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Merge branch 'x86/urgent' into core/signal

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Conflicts:
	arch/x86/kernel/signal_64.c
This commit is contained in:
Ingo Molnar 2008-10-12 11:32:17 +02:00
commit 206855c321
3527 changed files with 215005 additions and 116661 deletions
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2
Documentation/00-INDEX
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@ -251,8 +251,6 @@ mono.txt
- how to execute Mono-based .NET binaries with the help of BINFMT_MISC.
moxa-smartio
- file with info on installing/using Moxa multiport serial driver.
mtrr.txt
- how to use PPro Memory Type Range Registers to increase performance.
mutex-design.txt
- info on the generic mutex subsystem.
namespaces/

2
Documentation/DMA-API.txt
View File

@ -337,7 +337,7 @@ With scatterlists, you use the resulting mapping like this:
int i, count = dma_map_sg(dev, sglist, nents, direction);
struct scatterlist *sg;
for (i = 0, sg = sglist; i < count; i++, sg++) {
for_each_sg(sglist, sg, count, i) {
hw_address[i] = sg_dma_address(sg);
hw_len[i] = sg_dma_len(sg);
}

2
Documentation/DMA-mapping.txt
View File

@ -740,7 +740,7 @@ failure can be determined by:
dma_addr_t dma_handle;
dma_handle = pci_map_single(pdev, addr, size, direction);
if (pci_dma_mapping_error(dma_handle)) {
if (pci_dma_mapping_error(pdev, dma_handle)) {
/*
* reduce current DMA mapping usage,
* delay and try again later or

5
Documentation/DocBook/kernel-api.tmpl
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@ -283,6 +283,7 @@ X!Earch/x86/kernel/mca_32.c
<chapter id="security">
<title>Security Framework</title>
!Isecurity/security.c
!Esecurity/inode.c
</chapter>
<chapter id="audit">
@ -364,6 +365,10 @@ X!Edrivers/pnp/system.c
!Eblock/blk-barrier.c
!Eblock/blk-tag.c
!Iblock/blk-tag.c
!Eblock/blk-integrity.c
!Iblock/blktrace.c
!Iblock/genhd.c
!Eblock/genhd.c
</chapter>
<chapter id="chrdev">

12
Documentation/DocBook/mac80211.tmpl
View File

@ -145,7 +145,6 @@ usage should require reading the full document.
this though and the recommendation to allow only a single
interface in STA mode at first!
</para>
!Finclude/net/mac80211.h ieee80211_if_types
!Finclude/net/mac80211.h ieee80211_if_init_conf
!Finclude/net/mac80211.h ieee80211_if_conf
</chapter>
@ -177,8 +176,7 @@ usage should require reading the full document.
<title>functions/definitions</title>
!Finclude/net/mac80211.h ieee80211_rx_status
!Finclude/net/mac80211.h mac80211_rx_flags
!Finclude/net/mac80211.h ieee80211_tx_control
!Finclude/net/mac80211.h ieee80211_tx_status_flags
!Finclude/net/mac80211.h ieee80211_tx_info
!Finclude/net/mac80211.h ieee80211_rx
!Finclude/net/mac80211.h ieee80211_rx_irqsafe
!Finclude/net/mac80211.h ieee80211_tx_status
@ -189,12 +187,11 @@ usage should require reading the full document.
!Finclude/net/mac80211.h ieee80211_ctstoself_duration
!Finclude/net/mac80211.h ieee80211_generic_frame_duration
!Finclude/net/mac80211.h ieee80211_get_hdrlen_from_skb
!Finclude/net/mac80211.h ieee80211_get_hdrlen
!Finclude/net/mac80211.h ieee80211_hdrlen
!Finclude/net/mac80211.h ieee80211_wake_queue
!Finclude/net/mac80211.h ieee80211_stop_queue
!Finclude/net/mac80211.h ieee80211_start_queues
!Finclude/net/mac80211.h ieee80211_stop_queues
!Finclude/net/mac80211.h ieee80211_wake_queues
!Finclude/net/mac80211.h ieee80211_stop_queues
</sect1>
</chapter>
@ -230,8 +227,7 @@ usage should require reading the full document.
<title>Multiple queues and QoS support</title>
<para>TBD</para>
!Finclude/net/mac80211.h ieee80211_tx_queue_params
!Finclude/net/mac80211.h ieee80211_tx_queue_stats_data
!Finclude/net/mac80211.h ieee80211_tx_queue
!Finclude/net/mac80211.h ieee80211_tx_queue_stats
</chapter>
<chapter id="AP">

3
Documentation/HOWTO
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@ -77,7 +77,8 @@ documentation files are also added which explain how to use the feature.
When a kernel change causes the interface that the kernel exposes to
userspace to change, it is recommended that you send the information or
a patch to the manual pages explaining the change to the manual pages
maintainer at mtk.manpages@gmail.com.
maintainer at mtk.manpages@gmail.com, and CC the list
linux-api@vger.kernel.org.
Here is a list of files that are in the kernel source tree that are
required reading:

2
Documentation/RCU/checklist.txt
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@ -210,7 +210,7 @@ over a rather long period of time, but improvements are always welcome!
number of updates per grace period.
9. All RCU list-traversal primitives, which include
rcu_dereference(), list_for_each_rcu(), list_for_each_entry_rcu(),
rcu_dereference(), list_for_each_entry_rcu(),
list_for_each_continue_rcu(), and list_for_each_safe_rcu(),
must be either within an RCU read-side critical section or
must be protected by appropriate update-side locks. RCU

16
Documentation/RCU/rcuref.txt
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@ -29,9 +29,9 @@ release_referenced() delete()
}
If this list/array is made lock free using RCU as in changing the
write_lock() in add() and delete() to spin_lock and changing read_lock
in search_and_reference to rcu_read_lock(), the atomic_get in
search_and_reference could potentially hold reference to an element which
write_lock() in add() and delete() to spin_lock() and changing read_lock()
in search_and_reference() to rcu_read_lock(), the atomic_inc() in
search_and_reference() could potentially hold reference to an element which
has already been deleted from the list/array. Use atomic_inc_not_zero()
in this scenario as follows:
@ -40,20 +40,20 @@ add() search_and_reference()
{ {
alloc_object rcu_read_lock();
... search_for_element
atomic_set(&el->rc, 1); if (atomic_inc_not_zero(&el->rc)) {
write_lock(&list_lock); rcu_read_unlock();
atomic_set(&el->rc, 1); if (!atomic_inc_not_zero(&el->rc)) {
spin_lock(&list_lock); rcu_read_unlock();
return FAIL;
add_element }
... ...
write_unlock(&list_lock); rcu_read_unlock();
spin_unlock(&list_lock); rcu_read_unlock();
} }
3. 4.
release_referenced() delete()
{ {
... write_lock(&list_lock);
... spin_lock(&list_lock);
if (atomic_dec_and_test(&el->rc)) ...
call_rcu(&el->head, el_free); delete_element
... write_unlock(&list_lock);
... spin_unlock(&list_lock);
} ...
if (atomic_dec_and_test(&el->rc))
call_rcu(&el->head, el_free);

2
Documentation/RCU/whatisRCU.txt
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@ -786,8 +786,6 @@ RCU pointer/list traversal:
list_for_each_entry_rcu
hlist_for_each_entry_rcu
list_for_each_rcu (to be deprecated in favor of
list_for_each_entry_rcu)
list_for_each_continue_rcu (to be deprecated in favor of new
list_for_each_entry_continue_rcu)

27
Documentation/SELinux.txt Normal file
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@ -0,0 +1,27 @@
If you want to use SELinux, chances are you will want
to use the distro-provided policies, or install the
latest reference policy release from
http://oss.tresys.com/projects/refpolicy
However, if you want to install a dummy policy for
testing, you can do using 'mdp' provided under
scripts/selinux. Note that this requires the selinux
userspace to be installed - in particular you will
need checkpolicy to compile a kernel, and setfiles and
fixfiles to label the filesystem.
1. Compile the kernel with selinux enabled.
2. Type 'make' to compile mdp.
3. Make sure that you are not running with
SELinux enabled and a real policy. If
you are, reboot with selinux disabled
before continuing.
4. Run install_policy.sh:
cd scripts/selinux
sh install_policy.sh
Step 4 will create a new dummy policy valid for your
kernel, with a single selinux user, role, and type.
It will compile the policy, will set your SELINUXTYPE to
dummy in /etc/selinux/config, install the compiled policy
as 'dummy', and relabel your filesystem.

2
Documentation/SubmitChecklist
View File

@ -67,6 +67,8 @@ kernel patches.
19: All new userspace interfaces are documented in Documentation/ABI/.
See Documentation/ABI/README for more information.
Patches that change userspace interfaces should be CCed to
linux-api@vger.kernel.org.
20: Check that it all passes `make headers_check'.

14
Documentation/block/deadline-iosched.txt
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@ -30,12 +30,18 @@ write_expire (in ms)
Similar to read_expire mentioned above, but for writes.
fifo_batch
fifo_batch (number of requests)
----------
When a read request expires its deadline, we must move some requests from
the sorted io scheduler list to the block device dispatch queue. fifo_batch
controls how many requests we move.
Requests are grouped into ``batches'' of a particular data direction (read or
write) which are serviced in increasing sector order. To limit extra seeking,
deadline expiries are only checked between batches. fifo_batch controls the
maximum number of requests per batch.
This parameter tunes the balance between per-request latency and aggregate
throughput. When low latency is the primary concern, smaller is better (where
a value of 1 yields first-come first-served behaviour). Increasing fifo_batch
generally improves throughput, at the cost of latency variation.
writes_starved (number of dispatches)

3
Documentation/cdrom/ide-cd
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@ -145,8 +145,7 @@ useful for reading photocds.
To play an audio CD, you should first unmount and remove any data
CDROM. Any of the CDROM player programs should then work (workman,
workbone, cdplayer, etc.). Lacking anything else, you could use the
cdtester program in Documentation/cdrom/sbpcd.
workbone, cdplayer, etc.).
On a few drives, you can read digital audio directly using a program
such as cdda2wav. The only types of drive which I've heard support

10
Documentation/cpu-freq/index.txt
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@ -35,11 +35,9 @@ Mailing List
------------
There is a CPU frequency changing CVS commit and general list where
you can report bugs, problems or submit patches. To post a message,
send an email to cpufreq@lists.linux.org.uk, to subscribe go to
http://lists.linux.org.uk/mailman/listinfo/cpufreq. Previous post to the
mailing list are available to subscribers at
http://lists.linux.org.uk/mailman/private/cpufreq/.
send an email to cpufreq@vger.kernel.org, to subscribe go to
http://vger.kernel.org/vger-lists.html#cpufreq and follow the
instructions there.
Links
-----
@ -50,7 +48,7 @@ how to access the CVS repository:
* http://cvs.arm.linux.org.uk/
the CPUFreq Mailing list:
* http://lists.linux.org.uk/mailman/listinfo/cpufreq
* http://vger.kernel.org/vger-lists.html#cpufreq
Clock and voltage scaling for the SA-1100:
* http://www.lartmaker.nl/projects/scaling

21
Documentation/feature-removal-schedule.txt
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@ -6,6 +6,24 @@ be removed from this file.
---------------------------
What: old static regulatory information and ieee80211_regdom module parameter
When: 2.6.29
Why: The old regulatory infrastructure has been replaced with a new one
which does not require statically defined regulatory domains. We do
not want to keep static regulatory domains in the kernel due to the
the dynamic nature of regulatory law and localization. We kept around
the old static definitions for the regulatory domains of:
* US
* JP
* EU
and used by default the US when CONFIG_WIRELESS_OLD_REGULATORY was
set. We also kept around the ieee80211_regdom module parameter in case
some applications were relying on it. Changing regulatory domains
can now be done instead by using nl80211, as is done with iw.
Who: Luis R. Rodriguez <lrodriguez@atheros.com>
---------------------------
What: dev->power.power_state
When: July 2007
Why: Broken design for runtime control over driver power states, confusing
@ -232,6 +250,9 @@ What (Why):
- xt_mark match revision 0
(superseded by xt_mark match revision 1)
- xt_recent: the old ipt_recent proc dir
(superseded by /proc/net/xt_recent)
When: January 2009 or Linux 2.7.0, whichever comes first
Why: Superseded by newer revisions or modules
Who: Jan Engelhardt <jengelh@computergmbh.de>

14
Documentation/filesystems/ext4.txt
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@ -32,9 +32,9 @@ Mailing list: linux-ext4@vger.kernel.org
you will need to merge your changes with the version from e2fsprogs
1.41.x.
- Create a new filesystem using the ext4dev filesystem type:
- Create a new filesystem using the ext4 filesystem type:
# mke2fs -t ext4dev /dev/hda1
# mke2fs -t ext4 /dev/hda1
Or configure an existing ext3 filesystem to support extents and set
the test_fs flag to indicate that it's ok for an in-development
@ -47,13 +47,13 @@ Mailing list: linux-ext4@vger.kernel.org
# tune2fs -I 256 /dev/hda1
(Note: we currently do not have tools to convert an ext4dev
(Note: we currently do not have tools to convert an ext4
filesystem back to ext3; so please do not do try this on production
filesystems.)
- Mounting:
# mount -t ext4dev /dev/hda1 /wherever
# mount -t ext4 /dev/hda1 /wherever
- When comparing performance with other filesystems, remember that
ext3/4 by default offers higher data integrity guarantees than most.
@ -177,6 +177,11 @@ barrier=<0|1(*)> This enables/disables the use of write barriers in
your disks are battery-backed in one way or another,
disabling barriers may safely improve performance.
inode_readahead=n This tuning parameter controls the maximum
number of inode table blocks that ext4's inode
table readahead algorithm will pre-read into
the buffer cache. The default value is 32 blocks.
orlov (*) This enables the new Orlov block allocator. It is
enabled by default.
@ -252,6 +257,7 @@ stripe=n Number of filesystem blocks that mballoc will try
delalloc (*) Deferring block allocation until write-out time.
nodelalloc Disable delayed allocation. Blocks are allocation
when data is copied from user to page cache.
Data Mode
=========
There are 3 different data modes:

228
Documentation/filesystems/fiemap.txt Normal file
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@ -0,0 +1,228 @@
============
Fiemap Ioctl
============
The fiemap ioctl is an efficient method for userspace to get file
extent mappings. Instead of block-by-block mapping (such as bmap), fiemap
returns a list of extents.
Request Basics
--------------
A fiemap request is encoded within struct fiemap:
struct fiemap {
__u64 fm_start; /* logical offset (inclusive) at
* which to start mapping (in) */
__u64 fm_length; /* logical length of mapping which
* userspace cares about (in) */
__u32 fm_flags; /* FIEMAP_FLAG_* flags for request (in/out) */
__u32 fm_mapped_extents; /* number of extents that were
* mapped (out) */
__u32 fm_extent_count; /* size of fm_extents array (in) */
__u32 fm_reserved;
struct fiemap_extent fm_extents[0]; /* array of mapped extents (out) */
};
fm_start, and fm_length specify the logical range within the file
which the process would like mappings for. Extents returned mirror
those on disk - that is, the logical offset of the 1st returned extent
may start before fm_start, and the range covered by the last returned
extent may end after fm_length. All offsets and lengths are in bytes.
Certain flags to modify the way in which mappings are looked up can be
set in fm_flags. If the kernel doesn't understand some particular
flags, it will return EBADR and the contents of fm_flags will contain
the set of flags which caused the error. If the kernel is compatible
with all flags passed, the contents of fm_flags will be unmodified.
It is up to userspace to determine whether rejection of a particular
flag is fatal to it's operation. This scheme is intended to allow the
fiemap interface to grow in the future but without losing
compatibility with old software.
fm_extent_count specifies the number of elements in the fm_extents[] array
that can be used to return extents. If fm_extent_count is zero, then the
fm_extents[] array is ignored (no extents will be returned), and the
fm_mapped_extents count will hold the number of extents needed in
fm_extents[] to hold the file's current mapping. Note that there is
nothing to prevent the file from changing between calls to FIEMAP.
The following flags can be set in fm_flags:
* FIEMAP_FLAG_SYNC
If this flag is set, the kernel will sync the file before mapping extents.
* FIEMAP_FLAG_XATTR
If this flag is set, the extents returned will describe the inodes
extended attribute lookup tree, instead of it's data tree.
Extent Mapping
--------------
Extent information is returned within the embedded fm_extents array
which userspace must allocate along with the fiemap structure. The
number of elements in the fiemap_extents[] array should be passed via
fm_extent_count. The number of extents mapped by kernel will be
returned via fm_mapped_extents. If the number of fiemap_extents
allocated is less than would be required to map the requested range,
the maximum number of extents that can be mapped in the fm_extent[]
array will be returned and fm_mapped_extents will be equal to
fm_extent_count. In that case, the last extent in the array will not
complete the requested range and will not have the FIEMAP_EXTENT_LAST
flag set (see the next section on extent flags).
Each extent is described by a single fiemap_extent structure as
returned in fm_extents.
struct fiemap_extent {
__u64 fe_logical; /* logical offset in bytes for the start of
* the extent */
__u64 fe_physical; /* physical offset in bytes for the start
* of the extent */
__u64 fe_length; /* length in bytes for the extent */
__u64 fe_reserved64[2];
__u32 fe_flags; /* FIEMAP_EXTENT_* flags for this extent */
__u32 fe_reserved[3];
};
All offsets and lengths are in bytes and mirror those on disk. It is valid
for an extents logical offset to start before the request or it's logical
length to extend past the request. Unless FIEMAP_EXTENT_NOT_ALIGNED is
returned, fe_logical, fe_physical, and fe_length will be aligned to the
block size of the file system. With the exception of extents flagged as
FIEMAP_EXTENT_MERGED, adjacent extents will not be merged.
The fe_flags field contains flags which describe the extent returned.
A special flag, FIEMAP_EXTENT_LAST is always set on the last extent in
the file so that the process making fiemap calls can determine when no
more extents are available, without having to call the ioctl again.
Some flags are intentionally vague and will always be set in the
presence of other more specific flags. This way a program looking for
a general property does not have to know all existing and future flags
which imply that property.
For example, if FIEMAP_EXTENT_DATA_INLINE or FIEMAP_EXTENT_DATA_TAIL
are set, FIEMAP_EXTENT_NOT_ALIGNED will also be set. A program looking
for inline or tail-packed data can key on the specific flag. Software
which simply cares not to try operating on non-aligned extents
however, can just key on FIEMAP_EXTENT_NOT_ALIGNED, and not have to
worry about all present and future flags which might imply unaligned
data. Note that the opposite is not true - it would be valid for
FIEMAP_EXTENT_NOT_ALIGNED to appear alone.
* FIEMAP_EXTENT_LAST
This is the last extent in the file. A mapping attempt past this
extent will return nothing.
* FIEMAP_EXTENT_UNKNOWN
The location of this extent is currently unknown. This may indicate
the data is stored on an inaccessible volume or that no storage has
been allocated for the file yet.
* FIEMAP_EXTENT_DELALLOC
- This will also set FIEMAP_EXTENT_UNKNOWN.
Delayed allocation - while there is data for this extent, it's
physical location has not been allocated yet.
* FIEMAP_EXTENT_ENCODED
This extent does not consist of plain filesystem blocks but is
encoded (e.g. encrypted or compressed). Reading the data in this
extent via I/O to the block device will have undefined results.
Note that it is *always* undefined to try to update the data
in-place by writing to the indicated location without the
assistance of the filesystem, or to access the data using the
information returned by the FIEMAP interface while the filesystem
is mounted. In other words, user applications may only read the
extent data via I/O to the block device while the filesystem is
unmounted, and then only if the FIEMAP_EXTENT_ENCODED flag is
clear; user applications must not try reading or writing to the
filesystem via the block device under any other circumstances.
* FIEMAP_EXTENT_DATA_ENCRYPTED
- This will also set FIEMAP_EXTENT_ENCODED
The data in this extent has been encrypted by the file system.
* FIEMAP_EXTENT_NOT_ALIGNED
Extent offsets and length are not guaranteed to be block aligned.
* FIEMAP_EXTENT_DATA_INLINE
This will also set FIEMAP_EXTENT_NOT_ALIGNED
Data is located within a meta data block.
* FIEMAP_EXTENT_DATA_TAIL
This will also set FIEMAP_EXTENT_NOT_ALIGNED
Data is packed into a block with data from other files.
* FIEMAP_EXTENT_UNWRITTEN
Unwritten extent - the extent is allocated but it's data has not been
initialized. This indicates the extent's data will be all zero if read
through the filesystem but the contents are undefined if read directly from
the device.
* FIEMAP_EXTENT_MERGED
This will be set when a file does not support extents, i.e., it uses a block
based addressing scheme. Since returning an extent for each block back to
userspace would be highly inefficient, the kernel will try to merge most
adjacent blocks into 'extents'.
VFS -> File System Implementation
---------------------------------
File systems wishing to support fiemap must implement a ->fiemap callback on
their inode_operations structure. The fs ->fiemap call is responsible for
defining it's set of supported fiemap flags, and calling a helper function on
each discovered extent:
struct inode_operations {
...
int (*fiemap)(struct inode *, struct fiemap_extent_info *, u64 start,
u64 len);
->fiemap is passed struct fiemap_extent_info which describes the
fiemap request:
struct fiemap_extent_info {
unsigned int fi_flags; /* Flags as passed from user */
unsigned int fi_extents_mapped; /* Number of mapped extents */
unsigned int fi_extents_max; /* Size of fiemap_extent array */
struct fiemap_extent *fi_extents_start; /* Start of fiemap_extent array */
};
It is intended that the file system should not need to access any of this
structure directly.
Flag checking should be done at the beginning of the ->fiemap callback via the
fiemap_check_flags() helper:
int fiemap_check_flags(struct fiemap_extent_info *fieinfo, u32 fs_flags);
The struct fieinfo should be passed in as recieved from ioctl_fiemap(). The
set of fiemap flags which the fs understands should be passed via fs_flags. If
fiemap_check_flags finds invalid user flags, it will place the bad values in
fieinfo->fi_flags and return -EBADR. If the file system gets -EBADR, from
fiemap_check_flags(), it should immediately exit, returning that error back to
ioctl_fiemap().
For each extent in the request range, the file system should call
the helper function, fiemap_fill_next_extent():
int fiemap_fill_next_extent(struct fiemap_extent_info *info, u64 logical,
u64 phys, u64 len, u32 flags, u32 dev);
fiemap_fill_next_extent() will use the passed values to populate the
next free extent in the fm_extents array. 'General' extent flags will
automatically be set from specific flags on behalf of the calling file
system so that the userspace API is not broken.
fiemap_fill_next_extent() returns 0 on success, and 1 when the
user-supplied fm_extents array is full. If an error is encountered
while copying the extent to user memory, -EFAULT will be returned.

67
Documentation/filesystems/proc.txt
View File

@ -923,45 +923,44 @@ CPUs.
The "procs_blocked" line gives the number of processes currently blocked,
waiting for I/O to complete.
1.9 Ext4 file system parameters
------------------------------
Ext4 file system have one directory per partition under /proc/fs/ext4/
# ls /proc/fs/ext4/hdc/
group_prealloc max_to_scan mb_groups mb_history min_to_scan order2_req
stats stream_req
mb_groups:
This file gives the details of multiblock allocator buddy cache of free blocks
Information about mounted ext4 file systems can be found in
/proc/fs/ext4. Each mounted filesystem will have a directory in
/proc/fs/ext4 based on its device name (i.e., /proc/fs/ext4/hdc or
/proc/fs/ext4/dm-0). The files in each per-device directory are shown
in Table 1-10, below.
mb_history:
Multiblock allocation history.
Table 1-10: Files in /proc/fs/ext4/<devname>
..............................................................................
File Content
mb_groups details of multiblock allocator buddy cache of free blocks
mb_history multiblock allocation history
stats controls whether the multiblock allocator should start
collecting statistics, which are shown during the unmount
group_prealloc the multiblock allocator will round up allocation
requests to a multiple of this tuning parameter if the
stripe size is not set in the ext4 superblock
max_to_scan The maximum number of extents the multiblock allocator
will search to find the best extent
min_to_scan The minimum number of extents the multiblock allocator
will search to find the best extent
order2_req Tuning parameter which controls the minimum size for
requests (as a power of 2) where the buddy cache is
used
stream_req Files which have fewer blocks than this tunable
parameter will have their blocks allocated out of a
block group specific preallocation pool, so that small
files are packed closely together. Each large file
will have its blocks allocated out of its own unique
preallocation pool.
inode_readahead Tuning parameter which controls the maximum number of
inode table blocks that ext4's inode table readahead
algorithm will pre-read into the buffer cache
..............................................................................
stats:
This file indicate whether the multiblock allocator should start collecting
statistics. The statistics are shown during unmount
group_prealloc:
The multiblock allocator normalize the block allocation request to
group_prealloc filesystem blocks if we don't have strip value set.
The stripe value can be specified at mount time or during mke2fs.
max_to_scan:
How long multiblock allocator can look for a best extent (in found extents)
min_to_scan:
How long multiblock allocator must look for a best extent
order2_req:
Multiblock allocator use 2^N search using buddies only for requests greater
than or equal to order2_req. The request size is specfied in file system
blocks. A value of 2 indicate only if the requests are greater than or equal
to 4 blocks.
stream_req:
Files smaller than stream_req are served by the stream allocator, whose
purpose is to pack requests as close each to other as possible to
produce smooth I/O traffic. Avalue of 16 indicate that file smaller than 16
filesystem block size will use group based preallocation.
------------------------------------------------------------------------------
Summary

18
Documentation/hwmon/adt7473
View File

@ -14,14 +14,14 @@ Description
This driver implements support for the Analog Devices ADT7473 chip family.
The LM85 uses the 2-wire interface compatible with the SMBUS 2.0
The ADT7473 uses the 2-wire interface compatible with the SMBUS 2.0
specification. Using an analog to digital converter it measures three (3)
temperatures and two (2) voltages. It has three (3) 16-bit counters for
temperatures and two (2) voltages. It has four (4) 16-bit counters for
measuring fan speed. There are three (3) PWM outputs that can be used
to control fan speed.
A sophisticated control system for the PWM outputs is designed into the
LM85 that allows fan speed to be adjusted automatically based on any of the
ADT7473 that allows fan speed to be adjusted automatically based on any of the
three temperature sensors. Each PWM output is individually adjustable and
programmable. Once configured, the ADT7473 will adjust the PWM outputs in
response to the measured temperatures without further host intervention.
@ -46,14 +46,6 @@ from the raw value to get the temperature value.
The Analog Devices datasheet is very detailed and describes a procedure for
determining an optimal configuration for the automatic PWM control.
Hardware Configurations
-----------------------
The ADT7473 chips have an optional SMBALERT output that can be used to
signal the chipset in case a limit is exceeded or the temperature sensors
fail. Individual sensor interrupts can be masked so they won't trigger
SMBALERT. The SMBALERT output if configured replaces the PWM2 function.
Configuration Notes
-------------------
@ -61,8 +53,8 @@ Besides standard interfaces driver adds the following:
* PWM Control
* pwm#_auto_point1_pwm and pwm#_auto_point1_temp and
* pwm#_auto_point2_pwm and pwm#_auto_point2_temp -
* pwm#_auto_point1_pwm and temp#_auto_point1_temp and
* pwm#_auto_point2_pwm and temp#_auto_point2_temp -
point1: Set the pwm speed at a lower temperature bound.
point2: Set the pwm speed at a higher temperature bound.

12
Documentation/hwmon/sysfs-interface
View File

@ -329,6 +329,10 @@ power[1-*]_average Average power use
Unit: microWatt
RO
power[1-*]_average_interval Power use averaging interval
Unit: milliseconds
RW
power[1-*]_average_highest Historical average maximum power use
Unit: microWatt
RO
@ -353,6 +357,14 @@ power[1-*]_reset_history Reset input_highest, input_lowest,
average_highest and average_lowest.
WO
**********
* Energy *
**********
energy[1-*]_input Cumulative energy use
Unit: microJoule
RO
**********
* Alarms *
**********

4
Documentation/ioctl/cdrom.txt
View File

@ -271,14 +271,14 @@ CDROMCLOSETRAY pendant of CDROMEJECT
usage:
ioctl(fd, CDROMEJECT, 0);
ioctl(fd, CDROMCLOSETRAY, 0);
inputs: none
outputs: none
error returns:
ENOSYS cd drive not capable of ejecting
ENOSYS cd drive not capable of closing the tray
EBUSY other processes are accessing drive, or door is locked
notes:

4
Documentation/kernel-doc-nano-HOWTO.txt
View File

@ -168,10 +168,10 @@ if ($#ARGV < 0) {
mkdir $ARGV[0],0777;
$state = 0;
while (<STDIN>) {
if (/^\.TH \"[^\"]*\" 4 \"([^\"]*)\"/) {
if (/^\.TH \"[^\"]*\" 9 \"([^\"]*)\"/) {
if ($state == 1) { close OUT }
$state = 1;
$fn = "$ARGV[0]/$1.4";
$fn = "$ARGV[0]/$1.9";
print STDERR "Creating $fn\n";
open OUT, ">$fn" or die "can't open $fn: $!\n";
print OUT $_;

21
Documentation/kernel-parameters.txt
View File

@ -284,6 +284,11 @@ and is between 256 and 4096 characters. It is defined in the file
isolate - enable device isolation (each device, as far
as possible, will get its own protection
domain)
fullflush - enable flushing of IO/TLB entries when
they are unmapped. Otherwise they are
flushed before they will be reused, which
is a lot of faster
amd_iommu_size= [HW,X86-64]
Define the size of the aperture for the AMD IOMMU
driver. Possible values are:
@ -463,12 +468,6 @@ and is between 256 and 4096 characters. It is defined in the file
Range: 0 - 8192
Default: 64
disable_8254_timer
enable_8254_timer
[IA32/X86_64] Disable/Enable interrupt 0 timer routing
over the 8254 in addition to over the IO-APIC. The
kernel tries to set a sensible default.
hpet= [X86-32,HPET] option to control HPET usage
Format: { enable (default) | disable | force }
disable: disable HPET and use PIT instead
@ -1020,6 +1019,10 @@ and is between 256 and 4096 characters. It is defined in the file
(only serial suported for now)
Format: <serial_device>[,baud]
kmac= [MIPS] korina ethernet MAC address.
Configure the RouterBoard 532 series on-chip
Ethernet adapter MAC address.
l2cr= [PPC]
l3cr= [PPC]
@ -1888,6 +1891,12 @@ and is between 256 and 4096 characters. It is defined in the file
shapers= [NET]
Maximal number of shapers.
show_msr= [x86] show boot-time MSR settings
Format: { <integer> }
Show boot-time (BIOS-initialized) MSR settings.
The parameter means the number of CPUs to show,
for example 1 means boot CPU only.
sim710= [SCSI,HW]
See header of drivers/scsi/sim710.c.

305
Documentation/mtrr.txt
View File

@ -1,305 +0,0 @@
MTRR (Memory Type Range Register) control
3 Jun 1999
Richard Gooch
<rgooch@atnf.csiro.au>
On Intel P6 family processors (Pentium Pro, Pentium II and later)
the Memory Type Range Registers (MTRRs) may be used to control
processor access to memory ranges. This is most useful when you have
a video (VGA) card on a PCI or AGP bus. Enabling write-combining
allows bus write transfers to be combined into a larger transfer
before bursting over the PCI/AGP bus. This can increase performance
of image write operations 2.5 times or more.
The Cyrix 6x86, 6x86MX and M II processors have Address Range
Registers (ARRs) which provide a similar functionality to MTRRs. For
these, the ARRs are used to emulate the MTRRs.
The AMD K6-2 (stepping 8 and above) and K6-3 processors have two
MTRRs. These are supported. The AMD Athlon family provide 8 Intel
style MTRRs.
The Centaur C6 (WinChip) has 8 MCRs, allowing write-combining. These
are supported.
The VIA Cyrix III and VIA C3 CPUs offer 8 Intel style MTRRs.
The CONFIG_MTRR option creates a /proc/mtrr file which may be used
to manipulate your MTRRs. Typically the X server should use
this. This should have a reasonably generic interface so that
similar control registers on other processors can be easily
supported.
There are two interfaces to /proc/mtrr: one is an ASCII interface
which allows you to read and write. The other is an ioctl()
interface. The ASCII interface is meant for administration. The
ioctl() interface is meant for C programs (i.e. the X server). The
interfaces are described below, with sample commands and C code.
===============================================================================
Reading MTRRs from the shell:
% cat /proc/mtrr
reg00: base=0x00000000 ( 0MB), size= 128MB: write-back, count=1
reg01: base=0x08000000 ( 128MB), size= 64MB: write-back, count=1
===============================================================================
Creating MTRRs from the C-shell:
# echo "base=0xf8000000 size=0x400000 type=write-combining" >! /proc/mtrr
or if you use bash:
# echo "base=0xf8000000 size=0x400000 type=write-combining" >| /proc/mtrr
And the result thereof:
% cat /proc/mtrr
reg00: base=0x00000000 ( 0MB), size= 128MB: write-back, count=1
reg01: base=0x08000000 ( 128MB), size= 64MB: write-back, count=1
reg02: base=0xf8000000 (3968MB), size= 4MB: write-combining, count=1
This is for video RAM at base address 0xf8000000 and size 4 megabytes. To
find out your base address, you need to look at the output of your X
server, which tells you where the linear framebuffer address is. A
typical line that you may get is:
(--) S3: PCI: 968 rev 0, Linear FB @ 0xf8000000
Note that you should only use the value from the X server, as it may
move the framebuffer base address, so the only value you can trust is
that reported by the X server.
To find out the size of your framebuffer (what, you don't actually
know?), the following line will tell you:
(--) S3: videoram: 4096k
That's 4 megabytes, which is 0x400000 bytes (in hexadecimal).
A patch is being written for XFree86 which will make this automatic:
in other words the X server will manipulate /proc/mtrr using the
ioctl() interface, so users won't have to do anything. If you use a
commercial X server, lobby your vendor to add support for MTRRs.
===============================================================================
Creating overlapping MTRRs:
%echo "base=0xfb000000 size=0x1000000 type=write-combining" >/proc/mtrr
%echo "base=0xfb000000 size=0x1000 type=uncachable" >/proc/mtrr
And the results: cat /proc/mtrr
reg00: base=0x00000000 ( 0MB), size= 64MB: write-back, count=1
reg01: base=0xfb000000 (4016MB), size= 16MB: write-combining, count=1
reg02: base=0xfb000000 (4016MB), size= 4kB: uncachable, count=1
Some cards (especially Voodoo Graphics boards) need this 4 kB area
excluded from the beginning of the region because it is used for
registers.
NOTE: You can only create type=uncachable region, if the first
region that you created is type=write-combining.
===============================================================================
Removing MTRRs from the C-shell:
% echo "disable=2" >! /proc/mtrr
or using bash:
% echo "disable=2" >| /proc/mtrr
===============================================================================
Reading MTRRs from a C program using ioctl()'s:
/* mtrr-show.c
Source file for mtrr-show (example program to show MTRRs using ioctl()'s)
Copyright (C) 1997-1998 Richard Gooch
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
Richard Gooch may be reached by email at rgooch@atnf.csiro.au
The postal address is:
Richard Gooch, c/o ATNF, P. O. Box 76, Epping, N.S.W., 2121, Australia.
*/
/*
This program will use an ioctl() on /proc/mtrr to show the current MTRR
settings. This is an alternative to reading /proc/mtrr.
Written by Richard Gooch 17-DEC-1997
Last updated by Richard Gooch 2-MAY-1998
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <sys/ioctl.h>
#include <errno.h>
#include <asm/mtrr.h>
#define TRUE 1
#define FALSE 0
#define ERRSTRING strerror (errno)
static char *mtrr_strings[MTRR_NUM_TYPES] =
{
"uncachable", /* 0 */
"write-combining", /* 1 */
"?", /* 2 */
"?", /* 3 */
"write-through", /* 4 */
"write-protect", /* 5 */
"write-back", /* 6 */
};
int main ()
{
int fd;
struct mtrr_gentry gentry;
if ( ( fd = open ("/proc/mtrr", O_RDONLY, 0) ) == -1 )
{
if (errno == ENOENT)
{
fputs ("/proc/mtrr not found: not supported or you don't have a PPro?\n",
stderr);
exit (1);
}
fprintf (stderr, "Error opening /proc/mtrr\t%s\n", ERRSTRING);
exit (2);
}
for (gentry.regnum = 0; ioctl (fd, MTRRIOC_GET_ENTRY, &gentry) == 0;
++gentry.regnum)
{
if (gentry.size < 1)
{
fprintf (stderr, "Register: %u disabled\n", gentry.regnum);
continue;
}
fprintf (stderr, "Register: %u base: 0x%lx size: 0x%lx type: %s\n",
gentry.regnum, gentry.base, gentry.size,
mtrr_strings[gentry.type]);
}
if (errno == EINVAL) exit (0);
fprintf (stderr, "Error doing ioctl(2) on /dev/mtrr\t%s\n", ERRSTRING);
exit (3);
} /* End Function main */
===============================================================================
Creating MTRRs from a C programme using ioctl()'s:
/* mtrr-add.c
Source file for mtrr-add (example programme to add an MTRRs using ioctl())
Copyright (C) 1997-1998 Richard Gooch
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
Richard Gooch may be reached by email at rgooch@atnf.csiro.au
The postal address is:
Richard Gooch, c/o ATNF, P. O. Box 76, Epping, N.S.W., 2121, Australia.
*/
/*
This programme will use an ioctl() on /proc/mtrr to add an entry. The first
available mtrr is used. This is an alternative to writing /proc/mtrr.
Written by Richard Gooch 17-DEC-1997
Last updated by Richard Gooch 2-MAY-1998
*/
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <sys/ioctl.h>
#include <errno.h>
#include <asm/mtrr.h>
#define TRUE 1
#define FALSE 0
#define ERRSTRING strerror (errno)
static char *mtrr_strings[MTRR_NUM_TYPES] =
{
"uncachable", /* 0 */
"write-combining", /* 1 */
"?", /* 2 */
"?", /* 3 */
"write-through", /* 4 */
"write-protect", /* 5 */
"write-back", /* 6 */
};
int main (int argc, char **argv)
{
int fd;
struct mtrr_sentry sentry;
if (argc != 4)
{
fprintf (stderr, "Usage:\tmtrr-add base size type\n");
exit (1);
}
sentry.base = strtoul (argv[1], NULL, 0);
sentry.size = strtoul (argv[2], NULL, 0);
for (sentry.type = 0; sentry.type < MTRR_NUM_TYPES; ++sentry.type)
{
if (strcmp (argv[3], mtrr_strings[sentry.type]) == 0) break;
}
if (sentry.type >= MTRR_NUM_TYPES)
{
fprintf (stderr, "Illegal type: \"%s\"\n", argv[3]);
exit (2);
}
if ( ( fd = open ("/proc/mtrr", O_WRONLY, 0) ) == -1 )
{
if (errno == ENOENT)
{
fputs ("/proc/mtrr not found: not supported or you don't have a PPro?\n",
stderr);
exit (3);
}
fprintf (stderr, "Error opening /proc/mtrr\t%s\n", ERRSTRING);
exit (4);
}
if (ioctl (fd, MTRRIOC_ADD_ENTRY, &sentry) == -1)
{
fprintf (stderr, "Error doing ioctl(2) on /dev/mtrr\t%s\n", ERRSTRING);
exit (5);
}
fprintf (stderr, "Sleeping for 5 seconds so you can see the new entry\n");
sleep (5);
close (fd);
fputs ("I've just closed /proc/mtrr so now the new entry should be gone\n",
stderr);
} /* End Function main */
===============================================================================

46
Documentation/networking/LICENSE.qlge Normal file
View File

@ -0,0 +1,46 @@
Copyright (c) 2003-2008 QLogic Corporation
QLogic Linux Networking HBA Driver
This program includes a device driver for Linux 2.6 that may be
distributed with QLogic hardware specific firmware binary file.
You may modify and redistribute the device driver code under the
GNU General Public License as published by the Free Software
Foundation (version 2 or a later version).
You may redistribute the hardware specific firmware binary file
under the following terms:
1. Redistribution of source code (only if applicable),
must retain the above copyright notice, this list of
conditions and the following disclaimer.
2. Redistribution in binary form must reproduce the above
copyright notice, this list of conditions and the
following disclaimer in the documentation and/or other
materials provided with the distribution.
3. The name of QLogic Corporation may not be used to
endorse or promote products derived from this software
without specific prior written permission
REGARDLESS OF WHAT LICENSING MECHANISM IS USED OR APPLICABLE,
THIS PROGRAM IS PROVIDED BY QLOGIC CORPORATION "AS IS'' AND ANY
EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR
BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
POSSIBILITY OF SUCH DAMAGE.
USER ACKNOWLEDGES AND AGREES THAT USE OF THIS PROGRAM WILL NOT
CREATE OR GIVE GROUNDS FOR A LICENSE BY IMPLICATION, ESTOPPEL, OR
OTHERWISE IN ANY INTELLECTUAL PROPERTY RIGHTS (PATENT, COPYRIGHT,
TRADE SECRET, MASK WORK, OR OTHER PROPRIETARY RIGHT) EMBODIED IN
ANY OTHER QLOGIC HARDWARE OR SOFTWARE EITHER SOLELY OR IN
COMBINATION WITH THIS PROGRAM.

44
Documentation/networking/can.txt
View File

@ -35,8 +35,9 @@ This file contains
6.1 general settings
6.2 local loopback of sent frames
6.3 CAN controller hardware filters
6.4 currently supported CAN hardware
6.5 todo
6.4 The virtual CAN driver (vcan)
6.5 currently supported CAN hardware
6.6 todo
7 Credits
@ -584,7 +585,42 @@ solution for a couple of reasons:
@133MHz with four SJA1000 CAN controllers from 2002 under heavy bus
load without any problems ...
6.4 currently supported CAN hardware (September 2007)
6.4 The virtual CAN driver (vcan)
Similar to the network loopback devices, vcan offers a virtual local
CAN interface. A full qualified address on CAN consists of
- a unique CAN Identifier (CAN ID)
- the CAN bus this CAN ID is transmitted on (e.g. can0)
so in common use cases more than one virtual CAN interface is needed.
The virtual CAN interfaces allow the transmission and reception of CAN
frames without real CAN controller hardware. Virtual CAN network
devices are usually named 'vcanX', like vcan0 vcan1 vcan2 ...
When compiled as a module the virtual CAN driver module is called vcan.ko
Since Linux Kernel version 2.6.24 the vcan driver supports the Kernel
netlink interface to create vcan network devices. The creation and
removal of vcan network devices can be managed with the ip(8) tool:
- Create a virtual CAN network interface:
ip link add type vcan
- Create a virtual CAN network interface with a specific name 'vcan42':
ip link add dev vcan42 type vcan
- Remove a (virtual CAN) network interface 'vcan42':
ip link del vcan42
The tool 'vcan' from the SocketCAN SVN repository on BerliOS is obsolete.
Virtual CAN network device creation in older Kernels:
In Linux Kernel versions < 2.6.24 the vcan driver creates 4 vcan
netdevices at module load time by default. This value can be changed
with the module parameter 'numdev'. E.g. 'modprobe vcan numdev=8'
6.5 currently supported CAN hardware
On the project website http://developer.berlios.de/projects/socketcan
there are different drivers available:
@ -603,7 +639,7 @@ solution for a couple of reasons:
Please check the Mailing Lists on the berlios OSS project website.
6.5 todo (September 2007)
6.6 todo
The configuration interface for CAN network drivers is still an open
issue that has not been finalized in the socketcan project. Also the

54
Documentation/networking/multiqueue.txt
View File

@ -24,4 +24,56 @@ netif_{start|stop|wake}_subqueue() functions to manage each queue while the
device is still operational. netdev->queue_lock is still used when the device
comes online or when it's completely shut down (unregister_netdev(), etc.).
Author: Peter P. Waskiewicz Jr. <peter.p.waskiewicz.jr@intel.com>
Section 2: Qdisc support for multiqueue devices
-----------------------------------------------
Currently two qdiscs are optimized for multiqueue devices. The first is the
default pfifo_fast qdisc. This qdisc supports one qdisc per hardware queue.
A new round-robin qdisc, sch_multiq also supports multiple hardware queues. The
qdisc is responsible for classifying the skb's and then directing the skb's to
bands and queues based on the value in skb->queue_mapping. Use this field in
the base driver to determine which queue to send the skb to.
sch_multiq has been added for hardware that wishes to avoid head-of-line
blocking. It will cycle though the bands and verify that the hardware queue
associated with the band is not stopped prior to dequeuing a packet.
On qdisc load, the number of bands is based on the number of queues on the
hardware. Once the association is made, any skb with skb->queue_mapping set,
will be queued to the band associated with the hardware queue.
Section 3: Brief howto using MULTIQ for multiqueue devices
---------------------------------------------------------------
The userspace command 'tc,' part of the iproute2 package, is used to configure
qdiscs. To add the MULTIQ qdisc to your network device, assuming the device
is called eth0, run the following command:
# tc qdisc add dev eth0 root handle 1: multiq
The qdisc will allocate the number of bands to equal the number of queues that
the device reports, and bring the qdisc online. Assuming eth0 has 4 Tx
queues, the band mapping would look like:
band 0 => queue 0
band 1 => queue 1
band 2 => queue 2
band 3 => queue 3
Traffic will begin flowing through each queue based on either the simple_tx_hash
function or based on netdev->select_queue() if you have it defined.
The behavior of tc filters remains the same. However a new tc action,
skbedit, has been added. Assuming you wanted to route all traffic to a
specific host, for example 192.168.0.3, through a specific queue you could use
this action and establish a filter such as:
tc filter add dev eth0 parent 1: protocol ip prio 1 u32 \
match ip dst 192.168.0.3 \
action skbedit queue_mapping 3
Author: Alexander Duyck <alexander.h.duyck@intel.com>
Original Author: Peter P. Waskiewicz Jr. <peter.p.waskiewicz.jr@intel.com>

175
Documentation/networking/phonet.txt Normal file
View File

@ -0,0 +1,175 @@
Linux Phonet protocol family
============================
Introduction
------------
Phonet is a packet protocol used by Nokia cellular modems for both IPC
and RPC. With the Linux Phonet socket family, Linux host processes can
receive and send messages from/to the modem, or any other external
device attached to the modem. The modem takes care of routing.
Phonet packets can be exchanged through various hardware connections
depending on the device, such as:
- USB with the CDC Phonet interface,
- infrared,
- Bluetooth,
- an RS232 serial port (with a dedicated "FBUS" line discipline),
- the SSI bus with some TI OMAP processors.
Packets format
--------------
Phonet packets have a common header as follows:
struct phonethdr {
uint8_t pn_media; /* Media type (link-layer identifier) */
uint8_t pn_rdev; /* Receiver device ID */
uint8_t pn_sdev; /* Sender device ID */
uint8_t pn_res; /* Resource ID or function */
uint16_t pn_length; /* Big-endian message byte length (minus 6) */
uint8_t pn_robj; /* Receiver object ID */
uint8_t pn_sobj; /* Sender object ID */
};
On Linux, the link-layer header includes the pn_media byte (see below).
The next 7 bytes are part of the network-layer header.
The device ID is split: the 6 higher-order bits consitute the device
address, while the 2 lower-order bits are used for multiplexing, as are
the 8-bit object identifiers. As such, Phonet can be considered as a
network layer with 6 bits of address space and 10 bits for transport
protocol (much like port numbers in IP world).
The modem always has address number zero. All other device have a their
own 6-bit address.
Link layer
----------
Phonet links are always point-to-point links. The link layer header
consists of a single Phonet media type byte. It uniquely identifies the
link through which the packet is transmitted, from the modem's
perspective. Each Phonet network device shall prepend and set the media
type byte as appropriate. For convenience, a common phonet_header_ops
link-layer header operations structure is provided. It sets the
media type according to the network device hardware address.
Linux Phonet network interfaces support a dedicated link layer packets
type (ETH_P_PHONET) which is out of the Ethernet type range. They can
only send and receive Phonet packets.
The virtual TUN tunnel device driver can also be used for Phonet. This
requires IFF_TUN mode, _without_ the IFF_NO_PI flag. In this case,
there is no link-layer header, so there is no Phonet media type byte.
Note that Phonet interfaces are not allowed to re-order packets, so
only the (default) Linux FIFO qdisc should be used with them.
Network layer
-------------
The Phonet socket address family maps the Phonet packet header:
struct sockaddr_pn {
sa_family_t spn_family; /* AF_PHONET */
uint8_t spn_obj; /* Object ID */
uint8_t spn_dev; /* Device ID */
uint8_t spn_resource; /* Resource or function */
uint8_t spn_zero[...]; /* Padding */
};
The resource field is only used when sending and receiving;
It is ignored by bind() and getsockname().
Low-level datagram protocol
---------------------------
Applications can send Phonet messages using the Phonet datagram socket
protocol from the PF_PHONET family. Each socket is bound to one of the
2^10 object IDs available, and can send and receive packets with any
other peer.
struct sockaddr_pn addr = { .spn_family = AF_PHONET, };
ssize_t len;
socklen_t addrlen = sizeof(addr);
int fd;
fd = socket(PF_PHONET, SOCK_DGRAM, 0);
bind(fd, (struct sockaddr *)&addr, sizeof(addr));
/* ... */
sendto(fd, msg, msglen, 0, (struct sockaddr *)&addr, sizeof(addr));
len = recvfrom(fd, buf, sizeof(buf), 0,
(struct sockaddr *)&addr, &addrlen);
This protocol follows the SOCK_DGRAM connection-less semantics.
However, connect() and getpeername() are not supported, as they did
not seem useful with Phonet usages (could be added easily).
Phonet Pipe protocol
--------------------
The Phonet Pipe protocol is a simple sequenced packets protocol
with end-to-end congestion control. It uses the passive listening
socket paradigm. The listening socket is bound to an unique free object
ID. Each listening socket can handle up to 255 simultaneous
connections, one per accept()'d socket.
int lfd, cfd;
lfd = socket(PF_PHONET, SOCK_SEQPACKET, PN_PROTO_PIPE);
listen (lfd, INT_MAX);
/* ... */
cfd = accept(lfd, NULL, NULL);
for (;;)
{
char buf[...];
ssize_t len = read(cfd, buf, sizeof(buf));
/* ... */
write(cfd, msg, msglen);
}
Connections are established between two endpoints by a "third party"
application. This means that both endpoints are passive; so connect()
is not possible.
WARNING:
When polling a connected pipe socket for writability, there is an
intrinsic race condition whereby writability might be lost between the
polling and the writing system calls. In this case, the socket will
block until write because possible again, unless non-blocking mode
becomes enabled.
The pipe protocol provides two socket options at the SOL_PNPIPE level:
PNPIPE_ENCAP accepts one integer value (int) of:
PNPIPE_ENCAP_NONE: The socket operates normally (default).
PNPIPE_ENCAP_IP: The socket is used as a backend for a virtual IP
interface. This requires CAP_NET_ADMIN capability. GPRS data
support on Nokia modems can use this. Note that the socket cannot
be reliably poll()'d or read() from while in this mode.
PNPIPE_IFINDEX is a read-only integer value. It contains the
interface index of the network interface created by PNPIPE_ENCAP,
or zero if encapsulation is off.
Authors
-------
Linux Phonet was initially written by Sakari Ailus.
Other contributors include Mikä Liljeberg, Andras Domokos,
Carlos Chinea and Rémi Denis-Courmont.
Copyright (C) 2008 Nokia Corporation.

194
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@ -0,0 +1,194 @@
Linux wireless regulatory documentation
---------------------------------------
This document gives a brief review over how the Linux wireless
regulatory infrastructure works.
More up to date information can be obtained at the project's web page:
http://wireless.kernel.org/en/developers/Regulatory
Keeping regulatory domains in userspace
---------------------------------------
Due to the dynamic nature of regulatory domains we keep them
in userspace and provide a framework for userspace to upload
to the kernel one regulatory domain to be used as the central
core regulatory domain all wireless devices should adhere to.
How to get regulatory domains to the kernel
-------------------------------------------
Userspace gets a regulatory domain in the kernel by having
a userspace agent build it and send it via nl80211. Only
expected regulatory domains will be respected by the kernel.
A currently available userspace agent which can accomplish this
is CRDA - central regulatory domain agent. Its documented here:
http://wireless.kernel.org/en/developers/Regulatory/CRDA
Essentially the kernel will send a udev event when it knows
it needs a new regulatory domain. A udev rule can be put in place
to trigger crda to send the respective regulatory domain for a
specific ISO/IEC 3166 alpha2.
Below is an example udev rule which can be used:
# Example file, should be put in /etc/udev/rules.d/regulatory.rules
KERNEL=="regulatory*", ACTION=="change", SUBSYSTEM=="platform", RUN+="/sbin/crda"
The alpha2 is passed as an environment variable under the variable COUNTRY.
Who asks for regulatory domains?
--------------------------------
* Users
Users can use iw:
http://wireless.kernel.org/en/users/Documentation/iw
An example:
# set regulatory domain to "Costa Rica"
iw reg set CR
This will request the kernel to set the regulatory domain to
the specificied alpha2. The kernel in turn will then ask userspace
to provide a regulatory domain for the alpha2 specified by the user
by sending a uevent.
* Wireless subsystems for Country Information elements
The kernel will send a uevent to inform userspace a new
regulatory domain is required. More on this to be added
as its integration is added.
* Drivers
If drivers determine they need a specific regulatory domain
set they can inform the wireless core using regulatory_hint().
They have two options -- they either provide an alpha2 so that
crda can provide back a regulatory domain for that country or
they can build their own regulatory domain based on internal
custom knowledge so the wireless core can respect it.
*Most* drivers will rely on the first mechanism of providing a
regulatory hint with an alpha2. For these drivers there is an additional
check that can be used to ensure compliance based on custom EEPROM
regulatory data. This additional check can be used by drivers by
registering on its struct wiphy a reg_notifier() callback. This notifier
is called when the core's regulatory domain has been changed. The driver
can use this to review the changes made and also review who made them
(driver, user, country IE) and determine what to allow based on its
internal EEPROM data. Devices drivers wishing to be capable of world
roaming should use this callback. More on world roaming will be
added to this document when its support is enabled.
Device drivers who provide their own built regulatory domain
do not need a callback as the channels registered by them are
the only ones that will be allowed and therefore *additional*
cannels cannot be enabled.
Example code - drivers hinting an alpha2:
------------------------------------------
This example comes from the zd1211rw device driver. You can start
by having a mapping of your device's EEPROM country/regulatory
domain value to to a specific alpha2 as follows:
static struct zd_reg_alpha2_map reg_alpha2_map[] = {
{ ZD_REGDOMAIN_FCC, "US" },
{ ZD_REGDOMAIN_IC, "CA" },
{ ZD_REGDOMAIN_ETSI, "DE" }, /* Generic ETSI, use most restrictive */
{ ZD_REGDOMAIN_JAPAN, "JP" },
{ ZD_REGDOMAIN_JAPAN_ADD, "JP" },
{ ZD_REGDOMAIN_SPAIN, "ES" },
{ ZD_REGDOMAIN_FRANCE, "FR" },
Then you can define a routine to map your read EEPROM value to an alpha2,
as follows:
static int zd_reg2alpha2(u8 regdomain, char *alpha2)
{
unsigned int i;
struct zd_reg_alpha2_map *reg_map;
for (i = 0; i < ARRAY_SIZE(reg_alpha2_map); i++) {
reg_map = &reg_alpha2_map[i];
if (regdomain == reg_map->reg) {
alpha2[0] = reg_map->alpha2[0];
alpha2[1] = reg_map->alpha2[1];
return 0;
}
}
return 1;
}
Lastly, you can then hint to the core of your discovered alpha2, if a match
was found. You need to do this after you have registered your wiphy. You
are expected to do this during initialization.
r = zd_reg2alpha2(mac->regdomain, alpha2);
if (!r)
regulatory_hint(hw->wiphy, alpha2, NULL);
Example code - drivers providing a built in regulatory domain:
--------------------------------------------------------------
If you have regulatory information you can obtain from your
driver and you *need* to use this we let you build a regulatory domain
structure and pass it to the wireless core. To do this you should
kmalloc() a structure big enough to hold your regulatory domain
structure and you should then fill it with your data. Finally you simply
call regulatory_hint() with the regulatory domain structure in it.
Bellow is a simple example, with a regulatory domain cached using the stack.
Your implementation may vary (read EEPROM cache instead, for example).
Example cache of some regulatory domain
struct ieee80211_regdomain mydriver_jp_regdom = {
.n_reg_rules = 3,
.alpha2 = "JP",
//.alpha2 = "99", /* If I have no alpha2 to map it to */
.reg_rules = {
/* IEEE 802.11b/g, channels 1..14 */
REG_RULE(2412-20, 2484+20, 40, 6, 20, 0),
/* IEEE 802.11a, channels 34..48 */
REG_RULE(5170-20, 5240+20, 40, 6, 20,
NL80211_RRF_PASSIVE_SCAN),
/* IEEE 802.11a, channels 52..64 */
REG_RULE(5260-20, 5320+20, 40, 6, 20,
NL80211_RRF_NO_IBSS |
NL80211_RRF_DFS),
}
};
Then in some part of your code after your wiphy has been registered:
int r;
struct ieee80211_regdomain *rd;
int size_of_regd;
int num_rules = mydriver_jp_regdom.n_reg_rules;
unsigned int i;
size_of_regd = sizeof(struct ieee80211_regdomain) +
(num_rules * sizeof(struct ieee80211_reg_rule));
rd = kzalloc(size_of_regd, GFP_KERNEL);
if (!rd)
return -ENOMEM;
memcpy(rd, &mydriver_jp_regdom, sizeof(struct ieee80211_regdomain));
for (i=0; i < num_rules; i++) {
memcpy(&rd->reg_rules[i], &mydriver_jp_regdom.reg_rules[i],
sizeof(struct ieee80211_reg_rule));
}
r = regulatory_hint(hw->wiphy, NULL, rd);
if (r) {
kfree(rd);
return r;
}

85
Documentation/networking/tproxy.txt Normal file
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@ -0,0 +1,85 @@
Transparent proxy support
=========================
This feature adds Linux 2.2-like transparent proxy support to current kernels.
To use it, enable NETFILTER_TPROXY, the socket match and the TPROXY target in
your kernel config. You will need policy routing too, so be sure to enable that
as well.
1. Making non-local sockets work
================================
The idea is that you identify packets with destination address matching a local
socket on your box, set the packet mark to a certain value, and then match on that
value using policy routing to have those packets delivered locally:
# iptables -t mangle -N DIVERT
# iptables -t mangle -A PREROUTING -p tcp -m socket -j DIVERT
# iptables -t mangle -A DIVERT -j MARK --set-mark 1
# iptables -t mangle -A DIVERT -j ACCEPT
# ip rule add fwmark 1 lookup 100
# ip route add local 0.0.0.0/0 dev lo table 100
Because of certain restrictions in the IPv4 routing output code you'll have to
modify your application to allow it to send datagrams _from_ non-local IP
addresses. All you have to do is enable the (SOL_IP, IP_TRANSPARENT) socket
option before calling bind:
fd = socket(AF_INET, SOCK_STREAM, 0);
/* - 8< -*/
int value = 1;
setsockopt(fd, SOL_IP, IP_TRANSPARENT, &value, sizeof(value));
/* - 8< -*/
name.sin_family = AF_INET;
name.sin_port = htons(0xCAFE);
name.sin_addr.s_addr = htonl(0xDEADBEEF);
bind(fd, &name, sizeof(name));
A trivial patch for netcat is available here:
http://people.netfilter.org/hidden/tproxy/netcat-ip_transparent-support.patch
2. Redirecting traffic
======================
Transparent proxying often involves "intercepting" traffic on a router. This is
usually done with the iptables REDIRECT target; however, there are serious
limitations of that method. One of the major issues is that it actually
modifies the packets to change the destination address -- which might not be
acceptable in certain situations. (Think of proxying UDP for example: you won't
be able to find out the original destination address. Even in case of TCP
getting the original destination address is racy.)
The 'TPROXY' target provides similar functionality without relying on NAT. Simply
add rules like this to the iptables ruleset above:
# iptables -t mangle -A PREROUTING -p tcp --dport 80 -j TPROXY \
--tproxy-mark 0x1/0x1 --on-port 50080
Note that for this to work you'll have to modify the proxy to enable (SOL_IP,
IP_TRANSPARENT) for the listening socket.
3. Iptables extensions
======================
To use tproxy you'll need to have the 'socket' and 'TPROXY' modules
compiled for iptables. A patched version of iptables is available
here: http://git.balabit.hu/?p=bazsi/iptables-tproxy.git
4. Application support
======================
4.1. Squid
----------
Squid 3.HEAD has support built-in. To use it, pass
'--enable-linux-netfilter' to configure and set the 'tproxy' option on
the HTTP listener you redirect traffic to with the TPROXY iptables
target.
For more information please consult the following page on the Squid
wiki: http://wiki.squid-cache.org/Features/Tproxy4

32
Documentation/rfkill.txt
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@ -341,6 +341,8 @@ key that does nothing by itself, as well as any hot key that is type-specific
3.1 Guidelines for wireless device drivers
------------------------------------------
(in this text, rfkill->foo means the foo field of struct rfkill).
1. Each independent transmitter in a wireless device (usually there is only one
transmitter per device) should have a SINGLE rfkill class attached to it.
@ -363,10 +365,32 @@ This rule exists because users of the rfkill subsystem expect to get (and set,
when possible) the overall transmitter rfkill state, not of a particular rfkill
line.
5. During suspend, the rfkill class will attempt to soft-block the radio
through a call to rfkill->toggle_radio, and will try to restore its previous
state during resume. After a rfkill class is suspended, it will *not* call
rfkill->toggle_radio until it is resumed.
5. The wireless device driver MUST NOT leave the transmitter enabled during
suspend and hibernation unless:
5.1. The transmitter has to be enabled for some sort of functionality
like wake-on-wireless-packet or autonomous packed forwarding in a mesh
network, and that functionality is enabled for this suspend/hibernation
cycle.
AND
5.2. The device was not on a user-requested BLOCKED state before
the suspend (i.e. the driver must NOT unblock a device, not even
to support wake-on-wireless-packet or remain in the mesh).
In other words, there is absolutely no allowed scenario where a driver can
automatically take action to unblock a rfkill controller (obviously, this deals
with scenarios where soft-blocking or both soft and hard blocking is happening.
Scenarios where hardware rfkill lines are the only ones blocking the
transmitter are outside of this rule, since the wireless device driver does not
control its input hardware rfkill lines in the first place).
6. During resume, rfkill will try to restore its previous state.
7. After a rfkill class is suspended, it will *not* call rfkill->toggle_radio
until it is resumed.
Example of a WLAN wireless driver connected to the rfkill subsystem:
--------------------------------------------------------------------

11
Documentation/s390/CommonIO
View File

@ -70,13 +70,19 @@ Command line parameters
Note: While already known devices can be added to the list of devices to be
ignored, there will be no effect on then. However, if such a device
disappears and then reappears, it will then be ignored.
disappears and then reappears, it will then be ignored. To make
known devices go away, you need the "purge" command (see below).
For example,
"echo add 0.0.a000-0.0.accc, 0.0.af00-0.0.afff > /proc/cio_ignore"
will add 0.0.a000-0.0.accc and 0.0.af00-0.0.afff to the list of ignored
devices.
You can remove already known but now ignored devices via
"echo purge > /proc/cio_ignore"
All devices ignored but still registered and not online (= not in use)
will be deregistered and thus removed from the system.
The devices can be specified either by bus id (0.x.abcd) or, for 2.4 backward
compatibility, by the device number in hexadecimal (0xabcd or abcd). Device
numbers given as 0xabcd will be interpreted as 0.0.abcd.
@ -98,8 +104,7 @@ debugfs entries
handling).
- /sys/kernel/debug/s390dbf/cio_msg/sprintf
Various debug messages from the common I/O-layer, including messages
printed when cio_msg=yes.
Various debug messages from the common I/O-layer.
- /sys/kernel/debug/s390dbf/cio_trace/hex_ascii
Logs the calling of functions in the common I/O-layer and, if applicable,

387
Documentation/scheduler/sched-design-CFS.txt
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@ -1,151 +1,242 @@
This is the CFS scheduler.
80% of CFS's design can be summed up in a single sentence: CFS basically
models an "ideal, precise multi-tasking CPU" on real hardware.
"Ideal multi-tasking CPU" is a (non-existent :-)) CPU that has 100%
physical power and which can run each task at precise equal speed, in
parallel, each at 1/nr_running speed. For example: if there are 2 tasks
running then it runs each at 50% physical power - totally in parallel.
On real hardware, we can run only a single task at once, so while that
one task runs, the other tasks that are waiting for the CPU are at a
disadvantage - the current task gets an unfair amount of CPU time. In
CFS this fairness imbalance is expressed and tracked via the per-task
p->wait_runtime (nanosec-unit) value. "wait_runtime" is the amount of
time the task should now run on the CPU for it to become completely fair
and balanced.
( small detail: on 'ideal' hardware, the p->wait_runtime value would
always be zero - no task would ever get 'out of balance' from the
'ideal' share of CPU time. )
CFS's task picking logic is based on this p->wait_runtime value and it
is thus very simple: it always tries to run the task with the largest
p->wait_runtime value. In other words, CFS tries to run the task with
the 'gravest need' for more CPU time. So CFS always tries to split up
CPU time between runnable tasks as close to 'ideal multitasking
hardware' as possible.
Most of the rest of CFS's design just falls out of this really simple
concept, with a few add-on embellishments like nice levels,
multiprocessing and various algorithm variants to recognize sleepers.
In practice it works like this: the system runs a task a bit, and when
the task schedules (or a scheduler tick happens) the task's CPU usage is
'accounted for': the (small) time it just spent using the physical CPU
is deducted from p->wait_runtime. [minus the 'fair share' it would have
gotten anyway]. Once p->wait_runtime gets low enough so that another
task becomes the 'leftmost task' of the time-ordered rbtree it maintains
(plus a small amount of 'granularity' distance relative to the leftmost
task so that we do not over-schedule tasks and trash the cache) then the
new leftmost task is picked and the current task is preempted.
The rq->fair_clock value tracks the 'CPU time a runnable task would have
fairly gotten, had it been runnable during that time'. So by using
rq->fair_clock values we can accurately timestamp and measure the
'expected CPU time' a task should have gotten. All runnable tasks are
sorted in the rbtree by the "rq->fair_clock - p->wait_runtime" key, and
CFS picks the 'leftmost' task and sticks to it. As the system progresses
forwards, newly woken tasks are put into the tree more and more to the
right - slowly but surely giving a chance for every task to become the
'leftmost task' and thus get on the CPU within a deterministic amount of
time.
Some implementation details:
- the introduction of Scheduling Classes: an extensible hierarchy of
scheduler modules. These modules encapsulate scheduling policy
details and are handled by the scheduler core without the core
code assuming about them too much.
- sched_fair.c implements the 'CFS desktop scheduler': it is a
replacement for the vanilla scheduler's SCHED_OTHER interactivity
code.
I'd like to give credit to Con Kolivas for the general approach here:
he has proven via RSDL/SD that 'fair scheduling' is possible and that
it results in better desktop scheduling. Kudos Con!
The CFS patch uses a completely different approach and implementation
from RSDL/SD. My goal was to make CFS's interactivity quality exceed
that of RSDL/SD, which is a high standard to meet :-) Testing
feedback is welcome to decide this one way or another. [ and, in any
case, all of SD's logic could be added via a kernel/sched_sd.c module
as well, if Con is interested in such an approach. ]
CFS's design is quite radical: it does not use runqueues, it uses a
time-ordered rbtree to build a 'timeline' of future task execution,
and thus has no 'array switch' artifacts (by which both the vanilla
scheduler and RSDL/SD are affected).
CFS uses nanosecond granularity accounting and does not rely on any
jiffies or other HZ detail. Thus the CFS scheduler has no notion of
'timeslices' and has no heuristics whatsoever. There is only one
central tunable (you have to switch on CONFIG_SCHED_DEBUG):
/proc/sys/kernel/sched_granularity_ns
which can be used to tune the scheduler from 'desktop' (low
latencies) to 'server' (good batching) workloads. It defaults to a
setting suitable for desktop workloads. SCHED_BATCH is handled by the
CFS scheduler module too.
Due to its design, the CFS scheduler is not prone to any of the
'attacks' that exist today against the heuristics of the stock
scheduler: fiftyp.c, thud.c, chew.c, ring-test.c, massive_intr.c all
work fine and do not impact interactivity and produce the expected
behavior.
the CFS scheduler has a much stronger handling of nice levels and
SCHED_BATCH: both types of workloads should be isolated much more
agressively than under the vanilla scheduler.
( another detail: due to nanosec accounting and timeline sorting,
sched_yield() support is very simple under CFS, and in fact under
CFS sched_yield() behaves much better than under any other
scheduler i have tested so far. )
- sched_rt.c implements SCHED_FIFO and SCHED_RR semantics, in a simpler
way than the vanilla scheduler does. It uses 100 runqueues (for all
100 RT priority levels, instead of 140 in the vanilla scheduler)
and it needs no expired array.
- reworked/sanitized SMP load-balancing: the runqueue-walking
assumptions are gone from the load-balancing code now, and
iterators of the scheduling modules are used. The balancing code got
quite a bit simpler as a result.
=============
CFS Scheduler
=============
Group scheduler extension to CFS
================================
1. OVERVIEW
Normally the scheduler operates on individual tasks and strives to provide
fair CPU time to each task. Sometimes, it may be desirable to group tasks
and provide fair CPU time to each such task group. For example, it may
be desirable to first provide fair CPU time to each user on the system
and then to each task belonging to a user.
CFS stands for "Completely Fair Scheduler," and is the new "desktop" process
scheduler implemented by Ingo Molnar and merged in Linux 2.6.23. It is the
replacement for the previous vanilla scheduler's SCHED_OTHER interactivity
code.
CONFIG_FAIR_GROUP_SCHED strives to achieve exactly that. It lets
SCHED_NORMAL/BATCH tasks be be grouped and divides CPU time fairly among such
groups. At present, there are two (mutually exclusive) mechanisms to group
tasks for CPU bandwidth control purpose:
80% of CFS's design can be summed up in a single sentence: CFS basically models
an "ideal, precise multi-tasking CPU" on real hardware.
- Based on user id (CONFIG_FAIR_USER_SCHED)
In this option, tasks are grouped according to their user id.
- Based on "cgroup" pseudo filesystem (CONFIG_FAIR_CGROUP_SCHED)
This options lets the administrator create arbitrary groups
of tasks, using the "cgroup" pseudo filesystem. See
Documentation/cgroups.txt for more information about this
filesystem.
"Ideal multi-tasking CPU" is a (non-existent :-)) CPU that has 100% physical
power and which can run each task at precise equal speed, in parallel, each at
1/nr_running speed. For example: if there are 2 tasks running, then it runs
each at 50% physical power --- i.e., actually in parallel.
On real hardware, we can run only a single task at once, so we have to
introduce the concept of "virtual runtime." The virtual runtime of a task
specifies when its next timeslice would start execution on the ideal
multi-tasking CPU described above. In practice, the virtual runtime of a task
is its actual runtime normalized to the total number of running tasks.
2. FEW IMPLEMENTATION DETAILS
In CFS the virtual runtime is expressed and tracked via the per-task
p->se.vruntime (nanosec-unit) value. This way, it's possible to accurately
timestamp and measure the "expected CPU time" a task should have gotten.
[ small detail: on "ideal" hardware, at any time all tasks would have the same
p->se.vruntime value --- i.e., tasks would execute simultaneously and no task
would ever get "out of balance" from the "ideal" share of CPU time. ]
CFS's task picking logic is based on this p->se.vruntime value and it is thus
very simple: it always tries to run the task with the smallest p->se.vruntime
value (i.e., the task which executed least so far). CFS always tries to split
up CPU time between runnable tasks as close to "ideal multitasking hardware" as
possible.
Most of the rest of CFS's design just falls out of this really simple concept,
with a few add-on embellishments like nice levels, multiprocessing and various
algorithm variants to recognize sleepers.
3. THE RBTREE
CFS's design is quite radical: it does not use the old data structures for the
runqueues, but it uses a time-ordered rbtree to build a "timeline" of future
task execution, and thus has no "array switch" artifacts (by which both the
previous vanilla scheduler and RSDL/SD are affected).
CFS also maintains the rq->cfs.min_vruntime value, which is a monotonic
increasing value tracking the smallest vruntime among all tasks in the
runqueue. The total amount of work done by the system is tracked using
min_vruntime; that value is used to place newly activated entities on the left
side of the tree as much as possible.
The total number of running tasks in the runqueue is accounted through the
rq->cfs.load value, which is the sum of the weights of the tasks queued on the
runqueue.
CFS maintains a time-ordered rbtree, where all runnable tasks are sorted by the
p->se.vruntime key (there is a subtraction using rq->cfs.min_vruntime to
account for possible wraparounds). CFS picks the "leftmost" task from this
tree and sticks to it.
As the system progresses forwards, the executed tasks are put into the tree
more and more to the right --- slowly but surely giving a chance for every task
to become the "leftmost task" and thus get on the CPU within a deterministic
amount of time.
Summing up, CFS works like this: it runs a task a bit, and when the task
schedules (or a scheduler tick happens) the task's CPU usage is "accounted
for": the (small) time it just spent using the physical CPU is added to
p->se.vruntime. Once p->se.vruntime gets high enough so that another task
becomes the "leftmost task" of the time-ordered rbtree it maintains (plus a
small amount of "granularity" distance relative to the leftmost task so that we
do not over-schedule tasks and trash the cache), then the new leftmost task is
picked and the current task is preempted.
4. SOME FEATURES OF CFS
CFS uses nanosecond granularity accounting and does not rely on any jiffies or
other HZ detail. Thus the CFS scheduler has no notion of "timeslices" in the
way the previous scheduler had, and has no heuristics whatsoever. There is
only one central tunable (you have to switch on CONFIG_SCHED_DEBUG):
/proc/sys/kernel/sched_granularity_ns
which can be used to tune the scheduler from "desktop" (i.e., low latencies) to
"server" (i.e., good batching) workloads. It defaults to a setting suitable
for desktop workloads. SCHED_BATCH is handled by the CFS scheduler module too.
Due to its design, the CFS scheduler is not prone to any of the "attacks" that
exist today against the heuristics of the stock scheduler: fiftyp.c, thud.c,
chew.c, ring-test.c, massive_intr.c all work fine and do not impact
interactivity and produce the expected behavior.
The CFS scheduler has a much stronger handling of nice levels and SCHED_BATCH
than the previous vanilla scheduler: both types of workloads are isolated much
more aggressively.
SMP load-balancing has been reworked/sanitized: the runqueue-walking
assumptions are gone from the load-balancing code now, and iterators of the
scheduling modules are used. The balancing code got quite a bit simpler as a
result.
5. Scheduling policies
CFS implements three scheduling policies:
- SCHED_NORMAL (traditionally called SCHED_OTHER): The scheduling
policy that is used for regular tasks.
- SCHED_BATCH: Does not preempt nearly as often as regular tasks
would, thereby allowing tasks to run longer and make better use of
caches but at the cost of interactivity. This is well suited for
batch jobs.
- SCHED_IDLE: This is even weaker than nice 19, but its not a true
idle timer scheduler in order to avoid to get into priority
inversion problems which would deadlock the machine.
SCHED_FIFO/_RR are implemented in sched_rt.c and are as specified by
POSIX.
The command chrt from util-linux-ng 2.13.1.1 can set all of these except
SCHED_IDLE.
6. SCHEDULING CLASSES
The new CFS scheduler has been designed in such a way to introduce "Scheduling
Classes," an extensible hierarchy of scheduler modules. These modules
encapsulate scheduling policy details and are handled by the scheduler core
without the core code assuming too much about them.
sched_fair.c implements the CFS scheduler described above.
sched_rt.c implements SCHED_FIFO and SCHED_RR semantics, in a simpler way than
the previous vanilla scheduler did. It uses 100 runqueues (for all 100 RT
priority levels, instead of 140 in the previous scheduler) and it needs no
expired array.
Scheduling classes are implemented through the sched_class structure, which
contains hooks to functions that must be called whenever an interesting event
occurs.
This is the (partial) list of the hooks:
- enqueue_task(...)
Called when a task enters a runnable state.
It puts the scheduling entity (task) into the red-black tree and
increments the nr_running variable.
- dequeue_tree(...)
When a task is no longer runnable, this function is called to keep the
corresponding scheduling entity out of the red-black tree. It decrements
the nr_running variable.
- yield_task(...)
This function is basically just a dequeue followed by an enqueue, unless the
compat_yield sysctl is turned on; in that case, it places the scheduling
entity at the right-most end of the red-black tree.
- check_preempt_curr(...)
This function checks if a task that entered the runnable state should
preempt the currently running task.
- pick_next_task(...)
This function chooses the most appropriate task eligible to run next.
- set_curr_task(...)
This function is called when a task changes its scheduling class or changes
its task group.
- task_tick(...)
This function is mostly called from time tick functions; it might lead to
process switch. This drives the running preemption.
- task_new(...)
The core scheduler gives the scheduling module an opportunity to manage new
task startup. The CFS scheduling module uses it for group scheduling, while
the scheduling module for a real-time task does not use it.
7. GROUP SCHEDULER EXTENSIONS TO CFS
Normally, the scheduler operates on individual tasks and strives to provide
fair CPU time to each task. Sometimes, it may be desirable to group tasks and
provide fair CPU time to each such task group. For example, it may be
desirable to first provide fair CPU time to each user on the system and then to
each task belonging to a user.
CONFIG_GROUP_SCHED strives to achieve exactly that. It lets tasks to be
grouped and divides CPU time fairly among such groups.
CONFIG_RT_GROUP_SCHED permits to group real-time (i.e., SCHED_FIFO and
SCHED_RR) tasks.
CONFIG_FAIR_GROUP_SCHED permits to group CFS (i.e., SCHED_NORMAL and
SCHED_BATCH) tasks.
At present, there are two (mutually exclusive) mechanisms to group tasks for
CPU bandwidth control purposes:
- Based on user id (CONFIG_USER_SCHED)
With this option, tasks are grouped according to their user id.
- Based on "cgroup" pseudo filesystem (CONFIG_CGROUP_SCHED)
This options needs CONFIG_CGROUPS to be defined, and lets the administrator
create arbitrary groups of tasks, using the "cgroup" pseudo filesystem. See
Documentation/cgroups.txt for more information about this filesystem.
Only one of these options to group tasks can be chosen and not both.
Group scheduler tunables:
When CONFIG_FAIR_USER_SCHED is defined, a directory is created in sysfs for
each new user and a "cpu_share" file is added in that directory.
When CONFIG_USER_SCHED is defined, a directory is created in sysfs for each new
user and a "cpu_share" file is added in that directory.
# cd /sys/kernel/uids
# cat 512/cpu_share # Display user 512's CPU share
@ -155,16 +246,14 @@ each new user and a "cpu_share" file is added in that directory.
2048
#
CPU bandwidth between two users are divided in the ratio of their CPU shares.
For ex: if you would like user "root" to get twice the bandwidth of user
"guest", then set the cpu_share for both the users such that "root"'s
cpu_share is twice "guest"'s cpu_share
CPU bandwidth between two users is divided in the ratio of their CPU shares.
For example: if you would like user "root" to get twice the bandwidth of user
"guest," then set the cpu_share for both the users such that "root"'s cpu_share
is twice "guest"'s cpu_share.
When CONFIG_FAIR_CGROUP_SCHED is defined, a "cpu.shares" file is created
for each group created using the pseudo filesystem. See example steps
below to create task groups and modify their CPU share using the "cgroups"
pseudo filesystem
When CONFIG_CGROUP_SCHED is defined, a "cpu.shares" file is created for each
group created using the pseudo filesystem. See example steps below to create
task groups and modify their CPU share using the "cgroups" pseudo filesystem.
# mkdir /dev/cpuctl
# mount -t cgroup -ocpu none /dev/cpuctl

36
Documentation/scsi/scsi_fc_transport.txt
View File

@ -436,6 +436,42 @@ Other:
was updated to remove all vports for the fc_host as well.
Transport supplied functions
----------------------------
The following functions are supplied by the FC-transport for use by LLDs.
fc_vport_create - create a vport
fc_vport_terminate - detach and remove a vport
Details:
/**
* fc_vport_create - Admin App or LLDD requests creation of a vport
* @shost: scsi host the virtual port is connected to.
* @ids: The world wide names, FC4 port roles, etc for
* the virtual port.
*
* Notes:
* This routine assumes no locks are held on entry.
*/
struct fc_vport *
fc_vport_create(struct Scsi_Host *shost, struct fc_vport_identifiers *ids)
/**
* fc_vport_terminate - Admin App or LLDD requests termination of a vport
* @vport: fc_vport to be terminated
*
* Calls the LLDD vport_delete() function, then deallocates and removes
* the vport from the shost and object tree.
*
* Notes:
* This routine assumes no locks are held on entry.
*/
int
fc_vport_terminate(struct fc_vport *vport)
Credits
=======
The following people have contributed to this document:

62
Documentation/sound/alsa/ALSA-Configuration.txt
View File

@ -746,8 +746,10 @@ Prior to version 0.9.0rc4 options had a 'snd_' prefix. This was removed.
Module snd-hda-intel
--------------------
Module for Intel HD Audio (ICH6, ICH6M, ESB2, ICH7, ICH8),
ATI SB450, SB600, RS600,
Module for Intel HD Audio (ICH6, ICH6M, ESB2, ICH7, ICH8, ICH9, ICH10,
PCH, SCH),
ATI SB450, SB600, R600, RS600, RS690, RS780, RV610, RV620,
RV630, RV635, RV670, RV770,
VIA VT8251/VT8237A,
SIS966, ULI M5461
@ -807,6 +809,7 @@ Prior to version 0.9.0rc4 options had a 'snd_' prefix. This was removed.
ALC260
hp HP machines
hp-3013 HP machines (3013-variant)
hp-dc7600 HP DC7600
fujitsu Fujitsu S7020
acer Acer TravelMate
will Will laptops (PB V7900)
@ -828,8 +831,11 @@ Prior to version 0.9.0rc4 options had a 'snd_' prefix. This was removed.
hippo Hippo (ATI) with jack detection, Sony UX-90s
hippo_1 Hippo (Benq) with jack detection
sony-assamd Sony ASSAMD
toshiba-s06 Toshiba S06
toshiba-rx1 Toshiba RX1
ultra Samsung Q1 Ultra Vista model
lenovo-3000 Lenovo 3000 y410
nec NEC Versa S9100
basic fixed pin assignment w/o SPDIF
auto auto-config reading BIOS (default)
@ -838,6 +844,7 @@ Prior to version 0.9.0rc4 options had a 'snd_' prefix. This was removed.
3stack 3-stack model
toshiba Toshiba A205
acer Acer laptops
acer-aspire Acer Aspire One
dell Dell OEM laptops (Vostro 1200)
zepto Zepto laptops
test for testing/debugging purpose, almost all controls can
@ -847,6 +854,9 @@ Prior to version 0.9.0rc4 options had a 'snd_' prefix. This was removed.
ALC269
basic Basic preset
quanta Quanta FL1
eeepc-p703 ASUS Eeepc P703 P900A
eeepc-p901 ASUS Eeepc P901 S101
ALC662/663
3stack-dig 3-stack (2-channel) with SPDIF
@ -856,10 +866,17 @@ Prior to version 0.9.0rc4 options had a 'snd_' prefix. This was removed.
lenovo-101e Lenovo laptop
eeepc-p701 ASUS Eeepc P701
eeepc-ep20 ASUS Eeepc EP20
ecs ECS/Foxconn mobo
m51va ASUS M51VA
g71v ASUS G71V
h13 ASUS H13
g50v ASUS G50V
asus-mode1 ASUS
asus-mode2 ASUS
asus-mode3 ASUS
asus-mode4 ASUS
asus-mode5 ASUS
asus-mode6 ASUS
auto auto-config reading BIOS (default)
ALC882/885
@ -891,12 +908,14 @@ Prior to version 0.9.0rc4 options had a 'snd_' prefix. This was removed.
lenovo-101e Lenovo 101E
lenovo-nb0763 Lenovo NB0763
lenovo-ms7195-dig Lenovo MS7195
lenovo-sky Lenovo Sky
haier-w66 Haier W66
3stack-hp HP machines with 3stack (Lucknow, Samba boards)
6stack-dell Dell machines with 6stack (Inspiron 530)
mitac Mitac 8252D
clevo-m720 Clevo M720 laptop series
fujitsu-pi2515 Fujitsu AMILO Pi2515
3stack-6ch-intel Intel DG33* boards
auto auto-config reading BIOS (default)
ALC861/660
@ -929,7 +948,7 @@ Prior to version 0.9.0rc4 options had a 'snd_' prefix. This was removed.
allout 5-jack in back, 2-jack in front, SPDIF out
auto auto-config reading BIOS (default)
AD1882
AD1882 / AD1882A
3stack 3-stack mode (default)
6stack 6-stack mode
@ -1079,7 +1098,7 @@ Prior to version 0.9.0rc4 options had a 'snd_' prefix. This was removed.
register value without FIFO size correction as the current
DMA pointer. position_fix=2 will make the driver to use
the position buffer instead of reading SD_LPIB register.
(Usually SD_LPLIB register is more accurate than the
(Usually SD_LPIB register is more accurate than the
position buffer.)
NB: If you get many "azx_get_response timeout" messages at
@ -1166,6 +1185,7 @@ Prior to version 0.9.0rc4 options had a 'snd_' prefix. This was removed.
* Event Electronics, EZ8
* Digigram VX442
* Lionstracs, Mediastaton
* Terrasoniq TS 88
model - Use the given board model, one of the following:
delta1010, dio2496, delta66, delta44, audiophile, delta410,
@ -1200,7 +1220,10 @@ Prior to version 0.9.0rc4 options had a 'snd_' prefix. This was removed.
* TerraTec Phase 22
* TerraTec Phase 28
* AudioTrak Prodigy 7.1
* AudioTrak Prodigy 7.1LT
* AudioTrak Prodigy 7.1 LT
* AudioTrak Prodigy 7.1 XT
* AudioTrak Prodigy 7.1 HIFI
* AudioTrak Prodigy 7.1 HD2
* AudioTrak Prodigy 192
* Pontis MS300
* Albatron K8X800 Pro II
@ -1211,12 +1234,16 @@ Prior to version 0.9.0rc4 options had a 'snd_' prefix. This was removed.
* Shuttle SN25P
* Onkyo SE-90PCI
* Onkyo SE-200PCI
* ESI Juli@
* Hercules Fortissimo IV
* EGO-SYS WaveTerminal 192M
model - Use the given board model, one of the following:
revo51, revo71, amp2000, prodigy71, prodigy71lt,
prodigy192, aureon51, aureon71, universe, ap192,
k8x800, phase22, phase28, ms300, av710, se200pci,
se90pci
prodigy71xt, prodigy71hifi, prodigyhd2, prodigy192,
juli, aureon51, aureon71, universe, ap192, k8x800,
phase22, phase28, ms300, av710, se200pci, se90pci,
fortissimo4, sn25p, WT192M
This module supports multiple cards and autoprobe.
@ -1255,7 +1282,7 @@ Prior to version 0.9.0rc4 options had a 'snd_' prefix. This was removed.
Module for AC'97 motherboards from Intel and compatibles.
* Intel i810/810E, i815, i820, i830, i84x, MX440
ICH5, ICH6, ICH7, ESB2
ICH5, ICH6, ICH7, 6300ESB, ESB2
* SiS 7012 (SiS 735)
* NVidia NForce, NForce2, NForce3, MCP04, CK804
CK8, CK8S, MCP501
@ -1951,6 +1978,8 @@ Prior to version 0.9.0rc4 options had a 'snd_' prefix. This was removed.
* CHIC True Sound 4Dwave
* Shark Predator4D-PCI
* Jaton SonicWave 4D
* SiS SI7018 PCI Audio
* Hoontech SoundTrack Digital 4DWave NX
pcm_channels - max channels (voices) reserved for PCM
wavetable_size - max wavetable size in kB (4-?kb)
@ -1966,12 +1995,25 @@ Prior to version 0.9.0rc4 options had a 'snd_' prefix. This was removed.
vid - Vendor ID for the device (optional)
pid - Product ID for the device (optional)
nrpacks - Max. number of packets per URB (default: 8)
async_unlink - Use async unlink mode (default: yes)
device_setup - Device specific magic number (optional)
- Influence depends on the device
- Default: 0x0000
ignore_ctl_error - Ignore any USB-controller regarding mixer
interface (default: no)
This module supports multiple devices, autoprobe and hotplugging.
NB: nrpacks parameter can be modified dynamically via sysfs.
Don't put the value over 20. Changing via sysfs has no sanity
check.
NB: async_unlink=0 would cause Oops. It remains just for
debugging purpose (if any).
NB: ignore_ctl_error=1 may help when you get an error at accessing
the mixer element such as URB error -22. This happens on some
buggy USB device or the controller.
Module snd-usb-caiaq
--------------------
@ -2078,7 +2120,7 @@ Prior to version 0.9.0rc4 options had a 'snd_' prefix. This was removed.
-------------------
Module for sound cards based on the Asus AV100/AV200 chips,
i.e., Xonar D1, DX, D2 and D2X.
i.e., Xonar D1, DX, D2, D2X and HDAV1.3 (Deluxe).
This module supports autoprobe and multiple cards.

70
Documentation/sound/alsa/DocBook/writing-an-alsa-driver.tmpl
View File

@ -6135,44 +6135,58 @@ struct _snd_pcm_runtime {
</para>
</section>
<section id="useful-functions-snd-assert">
<title><function>snd_assert()</function></title>
<para>
<function>snd_assert()</function> macro is similar with the
normal <function>assert()</function> macro. For example,
<informalexample>
<programlisting>
<![CDATA[
snd_assert(pointer != NULL, return -EINVAL);
]]>
</programlisting>
</informalexample>
</para>
<para>
The first argument is the expression to evaluate, and the
second argument is the action if it fails. When
<constant>CONFIG_SND_DEBUG</constant>, is set, it will show an
error message such as <computeroutput>BUG? (xxx)</computeroutput>
together with stack trace.
</para>
<para>
When no debug flag is set, this macro is ignored.
</para>
</section>
<section id="useful-functions-snd-bug">
<title><function>snd_BUG()</function></title>
<para>
It shows the <computeroutput>BUG?</computeroutput> message and
stack trace as well as <function>snd_assert</function> at the point.
stack trace as well as <function>snd_BUG_ON</function> at the point.
It's useful to show that a fatal error happens there.
</para>
<para>
When no debug flag is set, this macro is ignored.
</para>
</section>
<section id="useful-functions-snd-bug-on">
<title><function>snd_BUG_ON()</function></title>
<para>
<function>snd_BUG_ON()</function> macro is similar with
<function>WARN_ON()</function> macro. For example,
<informalexample>
<programlisting>
<![CDATA[
snd_BUG_ON(!pointer);
]]>
</programlisting>
</informalexample>
or it can be used as the condition,
<informalexample>
<programlisting>
<![CDATA[
if (snd_BUG_ON(non_zero_is_bug))
return -EINVAL;
]]>
</programlisting>
</informalexample>
</para>
<para>
The macro takes an conditional expression to evaluate.
When <constant>CONFIG_SND_DEBUG</constant>, is set, the
expression is actually evaluated. If it's non-zero, it shows
the warning message such as
<computeroutput>BUG? (xxx)</computeroutput>
normally followed by stack trace. It returns the evaluated
value.
When no <constant>CONFIG_SND_DEBUG</constant> is set, this
macro always returns zero.
</para>
</section>
</chapter>

12
Documentation/sound/alsa/soc/dapm.txt
View File

@ -135,11 +135,7 @@ when the Mic is inserted:-
static int spitz_mic_bias(struct snd_soc_dapm_widget* w, int event)
{
if(SND_SOC_DAPM_EVENT_ON(event))
set_scoop_gpio(&spitzscoop2_device.dev, SPITZ_SCP2_MIC_BIAS);
else
reset_scoop_gpio(&spitzscoop2_device.dev, SPITZ_SCP2_MIC_BIAS);
gpio_set_value(SPITZ_GPIO_MIC_BIAS, SND_SOC_DAPM_EVENT_ON(event));
return 0;
}
@ -269,11 +265,7 @@ powered only when the spk is in use.
/* turn speaker amplifier on/off depending on use */
static int corgi_amp_event(struct snd_soc_dapm_widget *w, int event)
{
if (SND_SOC_DAPM_EVENT_ON(event))
set_scoop_gpio(&corgiscoop_device.dev, CORGI_SCP_APM_ON);
else
reset_scoop_gpio(&corgiscoop_device.dev, CORGI_SCP_APM_ON);
gpio_set_value(CORGI_GPIO_APM_ON, SND_SOC_DAPM_EVENT_ON(event));
return 0;
}

7
Documentation/sysctl/kernel.txt
View File

@ -351,9 +351,10 @@ kernel. This value defaults to SHMMAX.
softlockup_thresh:
This value can be used to lower the softlockup tolerance
threshold. The default threshold is 10s. If a cpu is locked up
for 10s, the kernel complains. Valid values are 1-60s.
This value can be used to lower the softlockup tolerance threshold. The
default threshold is 60 seconds. If a cpu is locked up for 60 seconds,
the kernel complains. Valid values are 1-60 seconds. Setting this
tunable to zero will disable the softlockup detection altogether.
==============================================================

12
Documentation/usb/anchors.txt
View File

@ -42,9 +42,21 @@ This function kills all URBs associated with an anchor. The URBs
are called in the reverse temporal order they were submitted.
This way no data can be reordered.
usb_unlink_anchored_urbs()
--------------------------
This function unlinks all URBs associated with an anchor. The URBs
are processed in the reverse temporal order they were submitted.
This is similar to usb_kill_anchored_urbs(), but it will not sleep.
Therefore no guarantee is made that the URBs have been unlinked when
the call returns. They may be unlinked later but will be unlinked in
finite time.
usb_wait_anchor_empty_timeout()
-------------------------------
This function waits for all URBs associated with an anchor to finish
or a timeout, whichever comes first. Its return value will tell you
whether the timeout was reached.

2
Documentation/video4linux/CARDLIST.em28xx
View File

@ -46,7 +46,7 @@
45 -> Pinnacle PCTV DVB-T (em2870)
46 -> Compro, VideoMate U3 (em2870) [185b:2870]
47 -> KWorld DVB-T 305U (em2880) [eb1a:e305]
48 -> KWorld DVB-T 310U (em2880)
48 -> KWorld DVB-T 310U (em2880) [eb1a:e310]
49 -> MSI DigiVox A/D (em2880) [eb1a:e310]
50 -> MSI DigiVox A/D II (em2880) [eb1a:e320]
51 -> Terratec Hybrid XS Secam (em2880) [0ccd:004c]

1
Documentation/video4linux/gspca.txt
View File

@ -190,6 +190,7 @@ pac7311 093a:260f SnakeCam
pac7311 093a:2621 PAC731x
pac7311 093a:2624 PAC7302
pac7311 093a:2626 Labtec 2200
pac7311 093a:262a Webcam 300k
zc3xx 0ac8:0302 Z-star Vimicro zc0302
vc032x 0ac8:0321 Vimicro generic vc0321
vc032x 0ac8:0323 Vimicro Vc0323

4
Documentation/x86/00-INDEX Normal file
View File

@ -0,0 +1,4 @@
00-INDEX
- this file
mtrr.txt
- how to use x86 Memory Type Range Registers to increase performance

900
Documentation/x86/boot.txt Normal file
View File

@ -0,0 +1,900 @@
THE LINUX/x86 BOOT PROTOCOL
---------------------------
On the x86 platform, the Linux kernel uses a rather complicated boot
convention. This has evolved partially due to historical aspects, as
well as the desire in the early days to have the kernel itself be a
bootable image, the complicated PC memory model and due to changed
expectations in the PC industry caused by the effective demise of
real-mode DOS as a mainstream operating system.
Currently, the following versions of the Linux/x86 boot protocol exist.
Old kernels: zImage/Image support only. Some very early kernels
may not even support a command line.
Protocol 2.00: (Kernel 1.3.73) Added bzImage and initrd support, as
well as a formalized way to communicate between the
boot loader and the kernel. setup.S made relocatable,
although the traditional setup area still assumed
writable.
Protocol 2.01: (Kernel 1.3.76) Added a heap overrun warning.
Protocol 2.02: (Kernel 2.4.0-test3-pre3) New command line protocol.
Lower the conventional memory ceiling. No overwrite
of the traditional setup area, thus making booting
safe for systems which use the EBDA from SMM or 32-bit
BIOS entry points. zImage deprecated but still
supported.
Protocol 2.03: (Kernel 2.4.18-pre1) Explicitly makes the highest possible
initrd address available to the bootloader.
Protocol 2.04: (Kernel 2.6.14) Extend the syssize field to four bytes.
Protocol 2.05: (Kernel 2.6.20) Make protected mode kernel relocatable.
Introduce relocatable_kernel and kernel_alignment fields.
Protocol 2.06: (Kernel 2.6.22) Added a field that contains the size of
the boot command line.
Protocol 2.07: (Kernel 2.6.24) Added paravirtualised boot protocol.
Introduced hardware_subarch and hardware_subarch_data
and KEEP_SEGMENTS flag in load_flags.
Protocol 2.08: (Kernel 2.6.26) Added crc32 checksum and ELF format
payload. Introduced payload_offset and payload length
fields to aid in locating the payload.
Protocol 2.09: (Kernel 2.6.26) Added a field of 64-bit physical
pointer to single linked list of struct setup_data.
**** MEMORY LAYOUT
The traditional memory map for the kernel loader, used for Image or
zImage kernels, typically looks like:
| |
0A0000 +------------------------+
| Reserved for BIOS | Do not use. Reserved for BIOS EBDA.
09A000 +------------------------+
| Command line |
| Stack/heap | For use by the kernel real-mode code.
098000 +------------------------+
| Kernel setup | The kernel real-mode code.
090200 +------------------------+
| Kernel boot sector | The kernel legacy boot sector.
090000 +------------------------+
| Protected-mode kernel | The bulk of the kernel image.
010000 +------------------------+
| Boot loader | <- Boot sector entry point 0000:7C00
001000 +------------------------+
| Reserved for MBR/BIOS |
000800 +------------------------+
| Typically used by MBR |
000600 +------------------------+
| BIOS use only |
000000 +------------------------+
When using bzImage, the protected-mode kernel was relocated to
0x100000 ("high memory"), and the kernel real-mode block (boot sector,
setup, and stack/heap) was made relocatable to any address between
0x10000 and end of low memory. Unfortunately, in protocols 2.00 and
2.01 the 0x90000+ memory range is still used internally by the kernel;
the 2.02 protocol resolves that problem.
It is desirable to keep the "memory ceiling" -- the highest point in
low memory touched by the boot loader -- as low as possible, since
some newer BIOSes have begun to allocate some rather large amounts of
memory, called the Extended BIOS Data Area, near the top of low
memory. The boot loader should use the "INT 12h" BIOS call to verify
how much low memory is available.
Unfortunately, if INT 12h reports that the amount of memory is too
low, there is usually nothing the boot loader can do but to report an
error to the user. The boot loader should therefore be designed to
take up as little space in low memory as it reasonably can. For
zImage or old bzImage kernels, which need data written into the
0x90000 segment, the boot loader should make sure not to use memory
above the 0x9A000 point; too many BIOSes will break above that point.
For a modern bzImage kernel with boot protocol version >= 2.02, a
memory layout like the following is suggested:
~ ~
| Protected-mode kernel |
100000 +------------------------+
| I/O memory hole |
0A0000 +------------------------+
| Reserved for BIOS | Leave as much as possible unused
~ ~
| Command line | (Can also be below the X+10000 mark)
X+10000 +------------------------+
| Stack/heap | For use by the kernel real-mode code.
X+08000 +------------------------+
| Kernel setup | The kernel real-mode code.
| Kernel boot sector | The kernel legacy boot sector.
X +------------------------+
| Boot loader | <- Boot sector entry point 0000:7C00
001000 +------------------------+
| Reserved for MBR/BIOS |
000800 +------------------------+
| Typically used by MBR |
000600 +------------------------+
| BIOS use only |
000000 +------------------------+
... where the address X is as low as the design of the boot loader
permits.
**** THE REAL-MODE KERNEL HEADER
In the following text, and anywhere in the kernel boot sequence, "a
sector" refers to 512 bytes. It is independent of the actual sector
size of the underlying medium.
The first step in loading a Linux kernel should be to load the
real-mode code (boot sector and setup code) and then examine the
following header at offset 0x01f1. The real-mode code can total up to
32K, although the boot loader may choose to load only the first two
sectors (1K) and then examine the bootup sector size.
The header looks like:
Offset Proto Name Meaning
/Size
01F1/1 ALL(1 setup_sects The size of the setup in sectors
01F2/2 ALL root_flags If set, the root is mounted readonly
01F4/4 2.04+(2 syssize The size of the 32-bit code in 16-byte paras
01F8/2 ALL ram_size DO NOT USE - for bootsect.S use only
01FA/2 ALL vid_mode Video mode control
01FC/2 ALL root_dev Default root device number
01FE/2 ALL boot_flag 0xAA55 magic number
0200/2 2.00+ jump Jump instruction
0202/4 2.00+ header Magic signature "HdrS"
0206/2 2.00+ version Boot protocol version supported
0208/4 2.00+ realmode_swtch Boot loader hook (see below)
020C/2 2.00+ start_sys The load-low segment (0x1000) (obsolete)
020E/2 2.00+ kernel_version Pointer to kernel version string
0210/1 2.00+ type_of_loader Boot loader identifier
0211/1 2.00+ loadflags Boot protocol option flags
0212/2 2.00+ setup_move_size Move to high memory size (used with hooks)
0214/4 2.00+ code32_start Boot loader hook (see below)
0218/4 2.00+ ramdisk_image initrd load address (set by boot loader)
021C/4 2.00+ ramdisk_size initrd size (set by boot loader)
0220/4 2.00+ bootsect_kludge DO NOT USE - for bootsect.S use only
0224/2 2.01+ heap_end_ptr Free memory after setup end
0226/2 N/A pad1 Unused
0228/4 2.02+ cmd_line_ptr 32-bit pointer to the kernel command line
022C/4 2.03+ initrd_addr_max Highest legal initrd address
0230/4 2.05+ kernel_alignment Physical addr alignment required for kernel
0234/1 2.05+ relocatable_kernel Whether kernel is relocatable or not
0235/3 N/A pad2 Unused
0238/4 2.06+ cmdline_size Maximum size of the kernel command line
023C/4 2.07+ hardware_subarch Hardware subarchitecture
0240/8 2.07+ hardware_subarch_data Subarchitecture-specific data
0248/4 2.08+ payload_offset Offset of kernel payload
024C/4 2.08+ payload_length Length of kernel payload
0250/8 2.09+ setup_data 64-bit physical pointer to linked list
of struct setup_data
(1) For backwards compatibility, if the setup_sects field contains 0, the
real value is 4.
(2) For boot protocol prior to 2.04, the upper two bytes of the syssize
field are unusable, which means the size of a bzImage kernel
cannot be determined.
If the "HdrS" (0x53726448) magic number is not found at offset 0x202,
the boot protocol version is "old". Loading an old kernel, the
following parameters should be assumed:
Image type = zImage
initrd not supported
Real-mode kernel must be located at 0x90000.
Otherwise, the "version" field contains the protocol version,
e.g. protocol version 2.01 will contain 0x0201 in this field. When
setting fields in the header, you must make sure only to set fields
supported by the protocol version in use.
**** DETAILS OF HEADER FIELDS
For each field, some are information from the kernel to the bootloader
("read"), some are expected to be filled out by the bootloader
("write"), and some are expected to be read and modified by the
bootloader ("modify").
All general purpose boot loaders should write the fields marked
(obligatory). Boot loaders who want to load the kernel at a
nonstandard address should fill in the fields marked (reloc); other
boot loaders can ignore those fields.
The byte order of all fields is littleendian (this is x86, after all.)
Field name: setup_sects
Type: read
Offset/size: 0x1f1/1
Protocol: ALL
The size of the setup code in 512-byte sectors. If this field is
0, the real value is 4. The real-mode code consists of the boot
sector (always one 512-byte sector) plus the setup code.
Field name: root_flags
Type: modify (optional)
Offset/size: 0x1f2/2
Protocol: ALL
If this field is nonzero, the root defaults to readonly. The use of
this field is deprecated; use the "ro" or "rw" options on the
command line instead.
Field name: syssize
Type: read
Offset/size: 0x1f4/4 (protocol 2.04+) 0x1f4/2 (protocol ALL)
Protocol: 2.04+
The size of the protected-mode code in units of 16-byte paragraphs.
For protocol versions older than 2.04 this field is only two bytes
wide, and therefore cannot be trusted for the size of a kernel if
the LOAD_HIGH flag is set.
Field name: ram_size
Type: kernel internal
Offset/size: 0x1f8/2
Protocol: ALL
This field is obsolete.
Field name: vid_mode
Type: modify (obligatory)
Offset/size: 0x1fa/2
Please see the section on SPECIAL COMMAND LINE OPTIONS.
Field name: root_dev
Type: modify (optional)
Offset/size: 0x1fc/2
Protocol: ALL
The default root device device number. The use of this field is
deprecated, use the "root=" option on the command line instead.
Field name: boot_flag
Type: read
Offset/size: 0x1fe/2
Protocol: ALL
Contains 0xAA55. This is the closest thing old Linux kernels have
to a magic number.
Field name: jump
Type: read
Offset/size: 0x200/2
Protocol: 2.00+
Contains an x86 jump instruction, 0xEB followed by a signed offset
relative to byte 0x202. This can be used to determine the size of
the header.
Field name: header
Type: read
Offset/size: 0x202/4
Protocol: 2.00+
Contains the magic number "HdrS" (0x53726448).
Field name: version
Type: read
Offset/size: 0x206/2
Protocol: 2.00+
Contains the boot protocol version, in (major << 8)+minor format,
e.g. 0x0204 for version 2.04, and 0x0a11 for a hypothetical version
10.17.
Field name: readmode_swtch
Type: modify (optional)
Offset/size: 0x208/4
Protocol: 2.00+
Boot loader hook (see ADVANCED BOOT LOADER HOOKS below.)
Field name: start_sys
Type: read
Offset/size: 0x20c/2
Protocol: 2.00+
The load low segment (0x1000). Obsolete.
Field name: kernel_version
Type: read
Offset/size: 0x20e/2
Protocol: 2.00+
If set to a nonzero value, contains a pointer to a NUL-terminated
human-readable kernel version number string, less 0x200. This can
be used to display the kernel version to the user. This value
should be less than (0x200*setup_sects).
For example, if this value is set to 0x1c00, the kernel version
number string can be found at offset 0x1e00 in the kernel file.
This is a valid value if and only if the "setup_sects" field
contains the value 15 or higher, as:
0x1c00 < 15*0x200 (= 0x1e00) but
0x1c00 >= 14*0x200 (= 0x1c00)
0x1c00 >> 9 = 14, so the minimum value for setup_secs is 15.
Field name: type_of_loader
Type: write (obligatory)
Offset/size: 0x210/1
Protocol: 2.00+
If your boot loader has an assigned id (see table below), enter
0xTV here, where T is an identifier for the boot loader and V is
a version number. Otherwise, enter 0xFF here.
Assigned boot loader ids:
0 LILO (0x00 reserved for pre-2.00 bootloader)
1 Loadlin
2 bootsect-loader (0x20, all other values reserved)
3 SYSLINUX
4 EtherBoot
5 ELILO
7 GRuB
8 U-BOOT
9 Xen
A Gujin
B Qemu
Please contact <hpa@zytor.com> if you need a bootloader ID
value assigned.
Field name: loadflags
Type: modify (obligatory)
Offset/size: 0x211/1
Protocol: 2.00+
This field is a bitmask.
Bit 0 (read): LOADED_HIGH
- If 0, the protected-mode code is loaded at 0x10000.
- If 1, the protected-mode code is loaded at 0x100000.
Bit 5 (write): QUIET_FLAG
- If 0, print early messages.
- If 1, suppress early messages.
This requests to the kernel (decompressor and early
kernel) to not write early messages that require
accessing the display hardware directly.
Bit 6 (write): KEEP_SEGMENTS
Protocol: 2.07+
- If 0, reload the segment registers in the 32bit entry point.
- If 1, do not reload the segment registers in the 32bit entry point.
Assume that %cs %ds %ss %es are all set to flat segments with
a base of 0 (or the equivalent for their environment).
Bit 7 (write): CAN_USE_HEAP
Set this bit to 1 to indicate that the value entered in the
heap_end_ptr is valid. If this field is clear, some setup code
functionality will be disabled.
Field name: setup_move_size
Type: modify (obligatory)
Offset/size: 0x212/2
Protocol: 2.00-2.01
When using protocol 2.00 or 2.01, if the real mode kernel is not
loaded at 0x90000, it gets moved there later in the loading
sequence. Fill in this field if you want additional data (such as
the kernel command line) moved in addition to the real-mode kernel
itself.
The unit is bytes starting with the beginning of the boot sector.
This field is can be ignored when the protocol is 2.02 or higher, or
if the real-mode code is loaded at 0x90000.
Field name: code32_start
Type: modify (optional, reloc)
Offset/size: 0x214/4
Protocol: 2.00+
The address to jump to in protected mode. This defaults to the load
address of the kernel, and can be used by the boot loader to
determine the proper load address.
This field can be modified for two purposes:
1. as a boot loader hook (see ADVANCED BOOT LOADER HOOKS below.)
2. if a bootloader which does not install a hook loads a
relocatable kernel at a nonstandard address it will have to modify
this field to point to the load address.
Field name: ramdisk_image
Type: write (obligatory)
Offset/size: 0x218/4
Protocol: 2.00+
The 32-bit linear address of the initial ramdisk or ramfs. Leave at
zero if there is no initial ramdisk/ramfs.
Field name: ramdisk_size
Type: write (obligatory)
Offset/size: 0x21c/4
Protocol: 2.00+
Size of the initial ramdisk or ramfs. Leave at zero if there is no
initial ramdisk/ramfs.
Field name: bootsect_kludge
Type: kernel internal
Offset/size: 0x220/4
Protocol: 2.00+
This field is obsolete.
Field name: heap_end_ptr
Type: write (obligatory)
Offset/size: 0x224/2
Protocol: 2.01+
Set this field to the offset (from the beginning of the real-mode
code) of the end of the setup stack/heap, minus 0x0200.
Field name: cmd_line_ptr
Type: write (obligatory)
Offset/size: 0x228/4
Protocol: 2.02+
Set this field to the linear address of the kernel command line.
The kernel command line can be located anywhere between the end of
the setup heap and 0xA0000; it does not have to be located in the
same 64K segment as the real-mode code itself.
Fill in this field even if your boot loader does not support a
command line, in which case you can point this to an empty string
(or better yet, to the string "auto".) If this field is left at
zero, the kernel will assume that your boot loader does not support
the 2.02+ protocol.
Field name: initrd_addr_max
Type: read
Offset/size: 0x22c/4
Protocol: 2.03+
The maximum address that may be occupied by the initial
ramdisk/ramfs contents. For boot protocols 2.02 or earlier, this
field is not present, and the maximum address is 0x37FFFFFF. (This
address is defined as the address of the highest safe byte, so if
your ramdisk is exactly 131072 bytes long and this field is
0x37FFFFFF, you can start your ramdisk at 0x37FE0000.)
Field name: kernel_alignment
Type: read (reloc)
Offset/size: 0x230/4
Protocol: 2.05+
Alignment unit required by the kernel (if relocatable_kernel is true.)
Field name: relocatable_kernel
Type: read (reloc)
Offset/size: 0x234/1
Protocol: 2.05+
If this field is nonzero, the protected-mode part of the kernel can
be loaded at any address that satisfies the kernel_alignment field.
After loading, the boot loader must set the code32_start field to
point to the loaded code, or to a boot loader hook.
Field name: cmdline_size
Type: read
Offset/size: 0x238/4
Protocol: 2.06+
The maximum size of the command line without the terminating
zero. This means that the command line can contain at most
cmdline_size characters. With protocol version 2.05 and earlier, the
maximum size was 255.
Field name: hardware_subarch
Type: write (optional, defaults to x86/PC)
Offset/size: 0x23c/4
Protocol: 2.07+
In a paravirtualized environment the hardware low level architectural
pieces such as interrupt handling, page table handling, and
accessing process control registers needs to be done differently.
This field allows the bootloader to inform the kernel we are in one
one of those environments.
0x00000000 The default x86/PC environment
0x00000001 lguest
0x00000002 Xen
Field name: hardware_subarch_data
Type: write (subarch-dependent)
Offset/size: 0x240/8
Protocol: 2.07+
A pointer to data that is specific to hardware subarch
This field is currently unused for the default x86/PC environment,
do not modify.
Field name: payload_offset
Type: read
Offset/size: 0x248/4
Protocol: 2.08+
If non-zero then this field contains the offset from the end of the
real-mode code to the payload.
The payload may be compressed. The format of both the compressed and
uncompressed data should be determined using the standard magic
numbers. Currently only gzip compressed ELF is used.
Field name: payload_length
Type: read
Offset/size: 0x24c/4
Protocol: 2.08+
The length of the payload.
Field name: setup_data
Type: write (special)
Offset/size: 0x250/8
Protocol: 2.09+
The 64-bit physical pointer to NULL terminated single linked list of
struct setup_data. This is used to define a more extensible boot
parameters passing mechanism. The definition of struct setup_data is
as follow:
struct setup_data {
u64 next;
u32 type;
u32 len;
u8 data[0];
};
Where, the next is a 64-bit physical pointer to the next node of
linked list, the next field of the last node is 0; the type is used
to identify the contents of data; the len is the length of data
field; the data holds the real payload.
This list may be modified at a number of points during the bootup
process. Therefore, when modifying this list one should always make
sure to consider the case where the linked list already contains
entries.
**** THE IMAGE CHECKSUM
From boot protocol version 2.08 onwards the CRC-32 is calculated over
the entire file using the characteristic polynomial 0x04C11DB7 and an
initial remainder of 0xffffffff. The checksum is appended to the
file; therefore the CRC of the file up to the limit specified in the
syssize field of the header is always 0.
**** THE KERNEL COMMAND LINE
The kernel command line has become an important way for the boot
loader to communicate with the kernel. Some of its options are also
relevant to the boot loader itself, see "special command line options"
below.
The kernel command line is a null-terminated string. The maximum
length can be retrieved from the field cmdline_size. Before protocol
version 2.06, the maximum was 255 characters. A string that is too
long will be automatically truncated by the kernel.
If the boot protocol version is 2.02 or later, the address of the
kernel command line is given by the header field cmd_line_ptr (see
above.) This address can be anywhere between the end of the setup
heap and 0xA0000.
If the protocol version is *not* 2.02 or higher, the kernel
command line is entered using the following protocol:
At offset 0x0020 (word), "cmd_line_magic", enter the magic
number 0xA33F.
At offset 0x0022 (word), "cmd_line_offset", enter the offset
of the kernel command line (relative to the start of the
real-mode kernel).
The kernel command line *must* be within the memory region
covered by setup_move_size, so you may need to adjust this
field.
**** MEMORY LAYOUT OF THE REAL-MODE CODE
The real-mode code requires a stack/heap to be set up, as well as
memory allocated for the kernel command line. This needs to be done
in the real-mode accessible memory in bottom megabyte.
It should be noted that modern machines often have a sizable Extended
BIOS Data Area (EBDA). As a result, it is advisable to use as little
of the low megabyte as possible.
Unfortunately, under the following circumstances the 0x90000 memory
segment has to be used:
- When loading a zImage kernel ((loadflags & 0x01) == 0).
- When loading a 2.01 or earlier boot protocol kernel.
-> For the 2.00 and 2.01 boot protocols, the real-mode code
can be loaded at another address, but it is internally
relocated to 0x90000. For the "old" protocol, the
real-mode code must be loaded at 0x90000.
When loading at 0x90000, avoid using memory above 0x9a000.
For boot protocol 2.02 or higher, the command line does not have to be
located in the same 64K segment as the real-mode setup code; it is
thus permitted to give the stack/heap the full 64K segment and locate
the command line above it.
The kernel command line should not be located below the real-mode
code, nor should it be located in high memory.
**** SAMPLE BOOT CONFIGURATION
As a sample configuration, assume the following layout of the real
mode segment:
When loading below 0x90000, use the entire segment:
0x0000-0x7fff Real mode kernel
0x8000-0xdfff Stack and heap
0xe000-0xffff Kernel command line
When loading at 0x90000 OR the protocol version is 2.01 or earlier:
0x0000-0x7fff Real mode kernel
0x8000-0x97ff Stack and heap
0x9800-0x9fff Kernel command line
Such a boot loader should enter the following fields in the header:
unsigned long base_ptr; /* base address for real-mode segment */
if ( setup_sects == 0 ) {
setup_sects = 4;
}
if ( protocol >= 0x0200 ) {
type_of_loader = <type code>;
if ( loading_initrd ) {
ramdisk_image = <initrd_address>;
ramdisk_size = <initrd_size>;
}
if ( protocol >= 0x0202 && loadflags & 0x01 )
heap_end = 0xe000;
else
heap_end = 0x9800;
if ( protocol >= 0x0201 ) {
heap_end_ptr = heap_end - 0x200;
loadflags |= 0x80; /* CAN_USE_HEAP */
}
if ( protocol >= 0x0202 ) {
cmd_line_ptr = base_ptr + heap_end;
strcpy(cmd_line_ptr, cmdline);
} else {
cmd_line_magic = 0xA33F;
cmd_line_offset = heap_end;
setup_move_size = heap_end + strlen(cmdline)+1;
strcpy(base_ptr+cmd_line_offset, cmdline);
}
} else {
/* Very old kernel */
heap_end = 0x9800;
cmd_line_magic = 0xA33F;
cmd_line_offset = heap_end;
/* A very old kernel MUST have its real-mode code
loaded at 0x90000 */
if ( base_ptr != 0x90000 ) {
/* Copy the real-mode kernel */
memcpy(0x90000, base_ptr, (setup_sects+1)*512);
base_ptr = 0x90000; /* Relocated */
}
strcpy(0x90000+cmd_line_offset, cmdline);
/* It is recommended to clear memory up to the 32K mark */
memset(0x90000 + (setup_sects+1)*512, 0,
(64-(setup_sects+1))*512);
}
**** LOADING THE REST OF THE KERNEL
The 32-bit (non-real-mode) kernel starts at offset (setup_sects+1)*512
in the kernel file (again, if setup_sects == 0 the real value is 4.)
It should be loaded at address 0x10000 for Image/zImage kernels and
0x100000 for bzImage kernels.
The kernel is a bzImage kernel if the protocol >= 2.00 and the 0x01
bit (LOAD_HIGH) in the loadflags field is set:
is_bzImage = (protocol >= 0x0200) && (loadflags & 0x01);
load_address = is_bzImage ? 0x100000 : 0x10000;
Note that Image/zImage kernels can be up to 512K in size, and thus use
the entire 0x10000-0x90000 range of memory. This means it is pretty
much a requirement for these kernels to load the real-mode part at
0x90000. bzImage kernels allow much more flexibility.
**** SPECIAL COMMAND LINE OPTIONS
If the command line provided by the boot loader is entered by the
user, the user may expect the following command line options to work.
They should normally not be deleted from the kernel command line even
though not all of them are actually meaningful to the kernel. Boot
loader authors who need additional command line options for the boot
loader itself should get them registered in
Documentation/kernel-parameters.txt to make sure they will not
conflict with actual kernel options now or in the future.
vga=<mode>
<mode> here is either an integer (in C notation, either
decimal, octal, or hexadecimal) or one of the strings
"normal" (meaning 0xFFFF), "ext" (meaning 0xFFFE) or "ask"
(meaning 0xFFFD). This value should be entered into the
vid_mode field, as it is used by the kernel before the command
line is parsed.
mem=<size>
<size> is an integer in C notation optionally followed by
(case insensitive) K, M, G, T, P or E (meaning << 10, << 20,
<< 30, << 40, << 50 or << 60). This specifies the end of
memory to the kernel. This affects the possible placement of
an initrd, since an initrd should be placed near end of
memory. Note that this is an option to *both* the kernel and
the bootloader!
initrd=<file>
An initrd should be loaded. The meaning of <file> is
obviously bootloader-dependent, and some boot loaders
(e.g. LILO) do not have such a command.
In addition, some boot loaders add the following options to the
user-specified command line:
BOOT_IMAGE=<file>
The boot image which was loaded. Again, the meaning of <file>
is obviously bootloader-dependent.
auto
The kernel was booted without explicit user intervention.
If these options are added by the boot loader, it is highly
recommended that they are located *first*, before the user-specified
or configuration-specified command line. Otherwise, "init=/bin/sh"
gets confused by the "auto" option.
**** RUNNING THE KERNEL
The kernel is started by jumping to the kernel entry point, which is
located at *segment* offset 0x20 from the start of the real mode
kernel. This means that if you loaded your real-mode kernel code at
0x90000, the kernel entry point is 9020:0000.
At entry, ds = es = ss should point to the start of the real-mode
kernel code (0x9000 if the code is loaded at 0x90000), sp should be
set up properly, normally pointing to the top of the heap, and
interrupts should be disabled. Furthermore, to guard against bugs in
the kernel, it is recommended that the boot loader sets fs = gs = ds =
es = ss.
In our example from above, we would do:
/* Note: in the case of the "old" kernel protocol, base_ptr must
be == 0x90000 at this point; see the previous sample code */
seg = base_ptr >> 4;
cli(); /* Enter with interrupts disabled! */
/* Set up the real-mode kernel stack */
_SS = seg;
_SP = heap_end;
_DS = _ES = _FS = _GS = seg;
jmp_far(seg+0x20, 0); /* Run the kernel */
If your boot sector accesses a floppy drive, it is recommended to
switch off the floppy motor before running the kernel, since the
kernel boot leaves interrupts off and thus the motor will not be
switched off, especially if the loaded kernel has the floppy driver as
a demand-loaded module!
**** ADVANCED BOOT LOADER HOOKS
If the boot loader runs in a particularly hostile environment (such as
LOADLIN, which runs under DOS) it may be impossible to follow the
standard memory location requirements. Such a boot loader may use the
following hooks that, if set, are invoked by the kernel at the
appropriate time. The use of these hooks should probably be
considered an absolutely last resort!
IMPORTANT: All the hooks are required to preserve %esp, %ebp, %esi and
%edi across invocation.
realmode_swtch:
A 16-bit real mode far subroutine invoked immediately before
entering protected mode. The default routine disables NMI, so
your routine should probably do so, too.
code32_start:
A 32-bit flat-mode routine *jumped* to immediately after the
transition to protected mode, but before the kernel is
uncompressed. No segments, except CS, are guaranteed to be
set up (current kernels do, but older ones do not); you should
set them up to BOOT_DS (0x18) yourself.
After completing your hook, you should jump to the address
that was in this field before your boot loader overwrote it
(relocated, if appropriate.)
**** 32-bit BOOT PROTOCOL
For machine with some new BIOS other than legacy BIOS, such as EFI,
LinuxBIOS, etc, and kexec, the 16-bit real mode setup code in kernel
based on legacy BIOS can not be used, so a 32-bit boot protocol needs
to be defined.
In 32-bit boot protocol, the first step in loading a Linux kernel
should be to setup the boot parameters (struct boot_params,
traditionally known as "zero page"). The memory for struct boot_params
should be allocated and initialized to all zero. Then the setup header
from offset 0x01f1 of kernel image on should be loaded into struct
boot_params and examined. The end of setup header can be calculated as
follow:
0x0202 + byte value at offset 0x0201
In addition to read/modify/write the setup header of the struct
boot_params as that of 16-bit boot protocol, the boot loader should
also fill the additional fields of the struct boot_params as that
described in zero-page.txt.
After setupping the struct boot_params, the boot loader can load the
32/64-bit kernel in the same way as that of 16-bit boot protocol.
In 32-bit boot protocol, the kernel is started by jumping to the
32-bit kernel entry point, which is the start address of loaded
32/64-bit kernel.
At entry, the CPU must be in 32-bit protected mode with paging
disabled; a GDT must be loaded with the descriptors for selectors
__BOOT_CS(0x10) and __BOOT_DS(0x18); both descriptors must be 4G flat
segment; __BOOS_CS must have execute/read permission, and __BOOT_DS
must have read/write permission; CS must be __BOOT_CS and DS, ES, SS
must be __BOOT_DS; interrupt must be disabled; %esi must hold the base
address of the struct boot_params; %ebp, %edi and %ebx must be zero.

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Documentation/x86/i386/boot.txt
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@ -1,900 +0,0 @@
THE LINUX/x86 BOOT PROTOCOL
---------------------------
On the x86 platform, the Linux kernel uses a rather complicated boot
convention. This has evolved partially due to historical aspects, as
well as the desire in the early days to have the kernel itself be a
bootable image, the complicated PC memory model and due to changed
expectations in the PC industry caused by the effective demise of
real-mode DOS as a mainstream operating system.
Currently, the following versions of the Linux/x86 boot protocol exist.
Old kernels: zImage/Image support only. Some very early kernels
may not even support a command line.
Protocol 2.00: (Kernel 1.3.73) Added bzImage and initrd support, as
well as a formalized way to communicate between the
boot loader and the kernel. setup.S made relocatable,
although the traditional setup area still assumed
writable.
Protocol 2.01: (Kernel 1.3.76) Added a heap overrun warning.
Protocol 2.02: (Kernel 2.4.0-test3-pre3) New command line protocol.
Lower the conventional memory ceiling. No overwrite
of the traditional setup area, thus making booting
safe for systems which use the EBDA from SMM or 32-bit
BIOS entry points. zImage deprecated but still
supported.
Protocol 2.03: (Kernel 2.4.18-pre1) Explicitly makes the highest possible
initrd address available to the bootloader.
Protocol 2.04: (Kernel 2.6.14) Extend the syssize field to four bytes.
Protocol 2.05: (Kernel 2.6.20) Make protected mode kernel relocatable.
Introduce relocatable_kernel and kernel_alignment fields.
Protocol 2.06: (Kernel 2.6.22) Added a field that contains the size of
the boot command line.
Protocol 2.07: (Kernel 2.6.24) Added paravirtualised boot protocol.
Introduced hardware_subarch and hardware_subarch_data
and KEEP_SEGMENTS flag in load_flags.
Protocol 2.08: (Kernel 2.6.26) Added crc32 checksum and ELF format
payload. Introduced payload_offset and payload length
fields to aid in locating the payload.
Protocol 2.09: (Kernel 2.6.26) Added a field of 64-bit physical
pointer to single linked list of struct setup_data.
**** MEMORY LAYOUT
The traditional memory map for the kernel loader, used for Image or
zImage kernels, typically looks like:
| |
0A0000 +------------------------+
| Reserved for BIOS | Do not use. Reserved for BIOS EBDA.
09A000 +------------------------+
| Command line |
| Stack/heap | For use by the kernel real-mode code.
098000 +------------------------+
| Kernel setup | The kernel real-mode code.
090200 +------------------------+
| Kernel boot sector | The kernel legacy boot sector.
090000 +------------------------+
| Protected-mode kernel | The bulk of the kernel image.
010000 +------------------------+
| Boot loader | <- Boot sector entry point 0000:7C00
001000 +------------------------+
| Reserved for MBR/BIOS |
000800 +------------------------+
| Typically used by MBR |
000600 +------------------------+
| BIOS use only |
000000 +------------------------+
When using bzImage, the protected-mode kernel was relocated to
0x100000 ("high memory"), and the kernel real-mode block (boot sector,
setup, and stack/heap) was made relocatable to any address between
0x10000 and end of low memory. Unfortunately, in protocols 2.00 and
2.01 the 0x90000+ memory range is still used internally by the kernel;
the 2.02 protocol resolves that problem.
It is desirable to keep the "memory ceiling" -- the highest point in
low memory touched by the boot loader -- as low as possible, since
some newer BIOSes have begun to allocate some rather large amounts of
memory, called the Extended BIOS Data Area, near the top of low
memory. The boot loader should use the "INT 12h" BIOS call to verify
how much low memory is available.
Unfortunately, if INT 12h reports that the amount of memory is too
low, there is usually nothing the boot loader can do but to report an
error to the user. The boot loader should therefore be designed to
take up as little space in low memory as it reasonably can. For
zImage or old bzImage kernels, which need data written into the
0x90000 segment, the boot loader should make sure not to use memory
above the 0x9A000 point; too many BIOSes will break above that point.
For a modern bzImage kernel with boot protocol version >= 2.02, a
memory layout like the following is suggested:
~ ~
| Protected-mode kernel |
100000 +------------------------+
| I/O memory hole |
0A0000 +------------------------+
| Reserved for BIOS | Leave as much as possible unused
~ ~
| Command line | (Can also be below the X+10000 mark)
X+10000 +------------------------+
| Stack/heap | For use by the kernel real-mode code.
X+08000 +------------------------+
| Kernel setup | The kernel real-mode code.
| Kernel boot sector | The kernel legacy boot sector.
X +------------------------+
| Boot loader | <- Boot sector entry point 0000:7C00
001000 +------------------------+
| Reserved for MBR/BIOS |
000800 +------------------------+
| Typically used by MBR |
000600 +------------------------+
| BIOS use only |
000000 +------------------------+
... where the address X is as low as the design of the boot loader
permits.
**** THE REAL-MODE KERNEL HEADER
In the following text, and anywhere in the kernel boot sequence, "a
sector" refers to 512 bytes. It is independent of the actual sector
size of the underlying medium.
The first step in loading a Linux kernel should be to load the
real-mode code (boot sector and setup code) and then examine the
following header at offset 0x01f1. The real-mode code can total up to
32K, although the boot loader may choose to load only the first two
sectors (1K) and then examine the bootup sector size.
The header looks like:
Offset Proto Name Meaning
/Size
01F1/1 ALL(1 setup_sects The size of the setup in sectors
01F2/2 ALL root_flags If set, the root is mounted readonly
01F4/4 2.04+(2 syssize The size of the 32-bit code in 16-byte paras
01F8/2 ALL ram_size DO NOT USE - for bootsect.S use only
01FA/2 ALL vid_mode Video mode control
01FC/2 ALL root_dev Default root device number
01FE/2 ALL boot_flag 0xAA55 magic number
0200/2 2.00+ jump Jump instruction
0202/4 2.00+ header Magic signature "HdrS"
0206/2 2.00+ version Boot protocol version supported
0208/4 2.00+ realmode_swtch Boot loader hook (see below)
020C/2 2.00+ start_sys The load-low segment (0x1000) (obsolete)
020E/2 2.00+ kernel_version Pointer to kernel version string
0210/1 2.00+ type_of_loader Boot loader identifier
0211/1 2.00+ loadflags Boot protocol option flags
0212/2 2.00+ setup_move_size Move to high memory size (used with hooks)
0214/4 2.00+ code32_start Boot loader hook (see below)
0218/4 2.00+ ramdisk_image initrd load address (set by boot loader)
021C/4 2.00+ ramdisk_size initrd size (set by boot loader)
0220/4 2.00+ bootsect_kludge DO NOT USE - for bootsect.S use only
0224/2 2.01+ heap_end_ptr Free memory after setup end
0226/2 N/A pad1 Unused
0228/4 2.02+ cmd_line_ptr 32-bit pointer to the kernel command line
022C/4 2.03+ initrd_addr_max Highest legal initrd address
0230/4 2.05+ kernel_alignment Physical addr alignment required for kernel
0234/1 2.05+ relocatable_kernel Whether kernel is relocatable or not
0235/3 N/A pad2 Unused
0238/4 2.06+ cmdline_size Maximum size of the kernel command line
023C/4 2.07+ hardware_subarch Hardware subarchitecture
0240/8 2.07+ hardware_subarch_data Subarchitecture-specific data
0248/4 2.08+ payload_offset Offset of kernel payload
024C/4 2.08+ payload_length Length of kernel payload
0250/8 2.09+ setup_data 64-bit physical pointer to linked list
of struct setup_data
(1) For backwards compatibility, if the setup_sects field contains 0, the
real value is 4.
(2) For boot protocol prior to 2.04, the upper two bytes of the syssize
field are unusable, which means the size of a bzImage kernel
cannot be determined.
If the "HdrS" (0x53726448) magic number is not found at offset 0x202,
the boot protocol version is "old". Loading an old kernel, the
following parameters should be assumed:
Image type = zImage
initrd not supported
Real-mode kernel must be located at 0x90000.
Otherwise, the "version" field contains the protocol version,
e.g. protocol version 2.01 will contain 0x0201 in this field. When
setting fields in the header, you must make sure only to set fields
supported by the protocol version in use.
**** DETAILS OF HEADER FIELDS
For each field, some are information from the kernel to the bootloader
("read"), some are expected to be filled out by the bootloader
("write"), and some are expected to be read and modified by the
bootloader ("modify").
All general purpose boot loaders should write the fields marked
(obligatory). Boot loaders who want to load the kernel at a
nonstandard address should fill in the fields marked (reloc); other
boot loaders can ignore those fields.
The byte order of all fields is littleendian (this is x86, after all.)
Field name: setup_sects
Type: read
Offset/size: 0x1f1/1
Protocol: ALL
The size of the setup code in 512-byte sectors. If this field is
0, the real value is 4. The real-mode code consists of the boot
sector (always one 512-byte sector) plus the setup code.
Field name: root_flags
Type: modify (optional)
Offset/size: 0x1f2/2
Protocol: ALL
If this field is nonzero, the root defaults to readonly. The use of
this field is deprecated; use the "ro" or "rw" options on the
command line instead.
Field name: syssize
Type: read
Offset/size: 0x1f4/4 (protocol 2.04+) 0x1f4/2 (protocol ALL)
Protocol: 2.04+
The size of the protected-mode code in units of 16-byte paragraphs.
For protocol versions older than 2.04 this field is only two bytes
wide, and therefore cannot be trusted for the size of a kernel if
the LOAD_HIGH flag is set.
Field name: ram_size
Type: kernel internal
Offset/size: 0x1f8/2
Protocol: ALL
This field is obsolete.
Field name: vid_mode
Type: modify (obligatory)
Offset/size: 0x1fa/2
Please see the section on SPECIAL COMMAND LINE OPTIONS.
Field name: root_dev
Type: modify (optional)
Offset/size: 0x1fc/2
Protocol: ALL
The default root device device number. The use of this field is
deprecated, use the "root=" option on the command line instead.
Field name: boot_flag
Type: read
Offset/size: 0x1fe/2
Protocol: ALL
Contains 0xAA55. This is the closest thing old Linux kernels have
to a magic number.
Field name: jump
Type: read
Offset/size: 0x200/2
Protocol: 2.00+
Contains an x86 jump instruction, 0xEB followed by a signed offset
relative to byte 0x202. This can be used to determine the size of
the header.
Field name: header
Type: read
Offset/size: 0x202/4
Protocol: 2.00+
Contains the magic number "HdrS" (0x53726448).
Field name: version
Type: read
Offset/size: 0x206/2
Protocol: 2.00+
Contains the boot protocol version, in (major << 8)+minor format,
e.g. 0x0204 for version 2.04, and 0x0a11 for a hypothetical version
10.17.
Field name: readmode_swtch
Type: modify (optional)
Offset/size: 0x208/4
Protocol: 2.00+
Boot loader hook (see ADVANCED BOOT LOADER HOOKS below.)
Field name: start_sys
Type: read
Offset/size: 0x20c/4
Protocol: 2.00+
The load low segment (0x1000). Obsolete.
Field name: kernel_version
Type: read
Offset/size: 0x20e/2
Protocol: 2.00+
If set to a nonzero value, contains a pointer to a NUL-terminated
human-readable kernel version number string, less 0x200. This can
be used to display the kernel version to the user. This value
should be less than (0x200*setup_sects).
For example, if this value is set to 0x1c00, the kernel version
number string can be found at offset 0x1e00 in the kernel file.
This is a valid value if and only if the "setup_sects" field
contains the value 15 or higher, as:
0x1c00 < 15*0x200 (= 0x1e00) but
0x1c00 >= 14*0x200 (= 0x1c00)
0x1c00 >> 9 = 14, so the minimum value for setup_secs is 15.
Field name: type_of_loader
Type: write (obligatory)
Offset/size: 0x210/1
Protocol: 2.00+
If your boot loader has an assigned id (see table below), enter
0xTV here, where T is an identifier for the boot loader and V is
a version number. Otherwise, enter 0xFF here.
Assigned boot loader ids:
0 LILO (0x00 reserved for pre-2.00 bootloader)
1 Loadlin
2 bootsect-loader (0x20, all other values reserved)
3 SYSLINUX
4 EtherBoot
5 ELILO
7 GRuB
8 U-BOOT
9 Xen
A Gujin
B Qemu
Please contact <hpa@zytor.com> if you need a bootloader ID
value assigned.
Field name: loadflags
Type: modify (obligatory)
Offset/size: 0x211/1
Protocol: 2.00+
This field is a bitmask.
Bit 0 (read): LOADED_HIGH
- If 0, the protected-mode code is loaded at 0x10000.
- If 1, the protected-mode code is loaded at 0x100000.
Bit 5 (write): QUIET_FLAG
- If 0, print early messages.
- If 1, suppress early messages.
This requests to the kernel (decompressor and early
kernel) to not write early messages that require
accessing the display hardware directly.
Bit 6 (write): KEEP_SEGMENTS
Protocol: 2.07+
- If 0, reload the segment registers in the 32bit entry point.
- If 1, do not reload the segment registers in the 32bit entry point.
Assume that %cs %ds %ss %es are all set to flat segments with
a base of 0 (or the equivalent for their environment).
Bit 7 (write): CAN_USE_HEAP
Set this bit to 1 to indicate that the value entered in the
heap_end_ptr is valid. If this field is clear, some setup code
functionality will be disabled.
Field name: setup_move_size
Type: modify (obligatory)
Offset/size: 0x212/2
Protocol: 2.00-2.01
When using protocol 2.00 or 2.01, if the real mode kernel is not
loaded at 0x90000, it gets moved there later in the loading
sequence. Fill in this field if you want additional data (such as
the kernel command line) moved in addition to the real-mode kernel
itself.
The unit is bytes starting with the beginning of the boot sector.
This field is can be ignored when the protocol is 2.02 or higher, or
if the real-mode code is loaded at 0x90000.
Field name: code32_start
Type: modify (optional, reloc)
Offset/size: 0x214/4
Protocol: 2.00+
The address to jump to in protected mode. This defaults to the load
address of the kernel, and can be used by the boot loader to
determine the proper load address.
This field can be modified for two purposes:
1. as a boot loader hook (see ADVANCED BOOT LOADER HOOKS below.)
2. if a bootloader which does not install a hook loads a
relocatable kernel at a nonstandard address it will have to modify
this field to point to the load address.
Field name: ramdisk_image
Type: write (obligatory)
Offset/size: 0x218/4
Protocol: 2.00+
The 32-bit linear address of the initial ramdisk or ramfs. Leave at
zero if there is no initial ramdisk/ramfs.
Field name: ramdisk_size
Type: write (obligatory)
Offset/size: 0x21c/4
Protocol: 2.00+
Size of the initial ramdisk or ramfs. Leave at zero if there is no
initial ramdisk/ramfs.
Field name: bootsect_kludge
Type: kernel internal
Offset/size: 0x220/4
Protocol: 2.00+
This field is obsolete.
Field name: heap_end_ptr
Type: write (obligatory)
Offset/size: 0x224/2
Protocol: 2.01+
Set this field to the offset (from the beginning of the real-mode
code) of the end of the setup stack/heap, minus 0x0200.
Field name: cmd_line_ptr
Type: write (obligatory)
Offset/size: 0x228/4
Protocol: 2.02+
Set this field to the linear address of the kernel command line.
The kernel command line can be located anywhere between the end of
the setup heap and 0xA0000; it does not have to be located in the
same 64K segment as the real-mode code itself.
Fill in this field even if your boot loader does not support a
command line, in which case you can point this to an empty string
(or better yet, to the string "auto".) If this field is left at
zero, the kernel will assume that your boot loader does not support
the 2.02+ protocol.
Field name: initrd_addr_max
Type: read
Offset/size: 0x22c/4
Protocol: 2.03+
The maximum address that may be occupied by the initial
ramdisk/ramfs contents. For boot protocols 2.02 or earlier, this
field is not present, and the maximum address is 0x37FFFFFF. (This
address is defined as the address of the highest safe byte, so if
your ramdisk is exactly 131072 bytes long and this field is
0x37FFFFFF, you can start your ramdisk at 0x37FE0000.)
Field name: kernel_alignment
Type: read (reloc)
Offset/size: 0x230/4
Protocol: 2.05+
Alignment unit required by the kernel (if relocatable_kernel is true.)
Field name: relocatable_kernel
Type: read (reloc)
Offset/size: 0x234/1
Protocol: 2.05+
If this field is nonzero, the protected-mode part of the kernel can
be loaded at any address that satisfies the kernel_alignment field.
After loading, the boot loader must set the code32_start field to
point to the loaded code, or to a boot loader hook.
Field name: cmdline_size
Type: read
Offset/size: 0x238/4
Protocol: 2.06+
The maximum size of the command line without the terminating
zero. This means that the command line can contain at most
cmdline_size characters. With protocol version 2.05 and earlier, the
maximum size was 255.
Field name: hardware_subarch
Type: write (optional, defaults to x86/PC)
Offset/size: 0x23c/4
Protocol: 2.07+
In a paravirtualized environment the hardware low level architectural
pieces such as interrupt handling, page table handling, and
accessing process control registers needs to be done differently.
This field allows the bootloader to inform the kernel we are in one
one of those environments.
0x00000000 The default x86/PC environment
0x00000001 lguest
0x00000002 Xen
Field name: hardware_subarch_data
Type: write (subarch-dependent)
Offset/size: 0x240/8
Protocol: 2.07+
A pointer to data that is specific to hardware subarch
This field is currently unused for the default x86/PC environment,
do not modify.
Field name: payload_offset
Type: read
Offset/size: 0x248/4
Protocol: 2.08+
If non-zero then this field contains the offset from the end of the
real-mode code to the payload.
The payload may be compressed. The format of both the compressed and
uncompressed data should be determined using the standard magic
numbers. Currently only gzip compressed ELF is used.
Field name: payload_length
Type: read
Offset/size: 0x24c/4
Protocol: 2.08+
The length of the payload.
Field name: setup_data
Type: write (special)
Offset/size: 0x250/8
Protocol: 2.09+
The 64-bit physical pointer to NULL terminated single linked list of
struct setup_data. This is used to define a more extensible boot
parameters passing mechanism. The definition of struct setup_data is
as follow:
struct setup_data {
u64 next;
u32 type;
u32 len;
u8 data[0];
};
Where, the next is a 64-bit physical pointer to the next node of
linked list, the next field of the last node is 0; the type is used
to identify the contents of data; the len is the length of data
field; the data holds the real payload.
This list may be modified at a number of points during the bootup
process. Therefore, when modifying this list one should always make
sure to consider the case where the linked list already contains
entries.
**** THE IMAGE CHECKSUM
From boot protocol version 2.08 onwards the CRC-32 is calculated over
the entire file using the characteristic polynomial 0x04C11DB7 and an
initial remainder of 0xffffffff. The checksum is appended to the
file; therefore the CRC of the file up to the limit specified in the
syssize field of the header is always 0.
**** THE KERNEL COMMAND LINE
The kernel command line has become an important way for the boot
loader to communicate with the kernel. Some of its options are also
relevant to the boot loader itself, see "special command line options"
below.
The kernel command line is a null-terminated string. The maximum
length can be retrieved from the field cmdline_size. Before protocol
version 2.06, the maximum was 255 characters. A string that is too
long will be automatically truncated by the kernel.
If the boot protocol version is 2.02 or later, the address of the
kernel command line is given by the header field cmd_line_ptr (see
above.) This address can be anywhere between the end of the setup
heap and 0xA0000.
If the protocol version is *not* 2.02 or higher, the kernel
command line is entered using the following protocol:
At offset 0x0020 (word), "cmd_line_magic", enter the magic
number 0xA33F.
At offset 0x0022 (word), "cmd_line_offset", enter the offset
of the kernel command line (relative to the start of the
real-mode kernel).
The kernel command line *must* be within the memory region
covered by setup_move_size, so you may need to adjust this
field.
**** MEMORY LAYOUT OF THE REAL-MODE CODE
The real-mode code requires a stack/heap to be set up, as well as
memory allocated for the kernel command line. This needs to be done
in the real-mode accessible memory in bottom megabyte.
It should be noted that modern machines often have a sizable Extended
BIOS Data Area (EBDA). As a result, it is advisable to use as little
of the low megabyte as possible.
Unfortunately, under the following circumstances the 0x90000 memory
segment has to be used:
- When loading a zImage kernel ((loadflags & 0x01) == 0).
- When loading a 2.01 or earlier boot protocol kernel.
-> For the 2.00 and 2.01 boot protocols, the real-mode code
can be loaded at another address, but it is internally
relocated to 0x90000. For the "old" protocol, the
real-mode code must be loaded at 0x90000.
When loading at 0x90000, avoid using memory above 0x9a000.
For boot protocol 2.02 or higher, the command line does not have to be
located in the same 64K segment as the real-mode setup code; it is
thus permitted to give the stack/heap the full 64K segment and locate
the command line above it.
The kernel command line should not be located below the real-mode
code, nor should it be located in high memory.
**** SAMPLE BOOT CONFIGURATION
As a sample configuration, assume the following layout of the real
mode segment:
When loading below 0x90000, use the entire segment:
0x0000-0x7fff Real mode kernel
0x8000-0xdfff Stack and heap
0xe000-0xffff Kernel command line
When loading at 0x90000 OR the protocol version is 2.01 or earlier:
0x0000-0x7fff Real mode kernel
0x8000-0x97ff Stack and heap
0x9800-0x9fff Kernel command line
Such a boot loader should enter the following fields in the header:
unsigned long base_ptr; /* base address for real-mode segment */
if ( setup_sects == 0 ) {
setup_sects = 4;
}
if ( protocol >= 0x0200 ) {
type_of_loader = <type code>;
if ( loading_initrd ) {
ramdisk_image = <initrd_address>;
ramdisk_size = <initrd_size>;
}
if ( protocol >= 0x0202 && loadflags & 0x01 )
heap_end = 0xe000;
else
heap_end = 0x9800;
if ( protocol >= 0x0201 ) {
heap_end_ptr = heap_end - 0x200;
loadflags |= 0x80; /* CAN_USE_HEAP */
}
if ( protocol >= 0x0202 ) {
cmd_line_ptr = base_ptr + heap_end;
strcpy(cmd_line_ptr, cmdline);
} else {
cmd_line_magic = 0xA33F;
cmd_line_offset = heap_end;
setup_move_size = heap_end + strlen(cmdline)+1;
strcpy(base_ptr+cmd_line_offset, cmdline);
}
} else {
/* Very old kernel */
heap_end = 0x9800;
cmd_line_magic = 0xA33F;
cmd_line_offset = heap_end;
/* A very old kernel MUST have its real-mode code
loaded at 0x90000 */
if ( base_ptr != 0x90000 ) {
/* Copy the real-mode kernel */
memcpy(0x90000, base_ptr, (setup_sects+1)*512);
base_ptr = 0x90000; /* Relocated */
}
strcpy(0x90000+cmd_line_offset, cmdline);
/* It is recommended to clear memory up to the 32K mark */
memset(0x90000 + (setup_sects+1)*512, 0,
(64-(setup_sects+1))*512);
}
**** LOADING THE REST OF THE KERNEL
The 32-bit (non-real-mode) kernel starts at offset (setup_sects+1)*512
in the kernel file (again, if setup_sects == 0 the real value is 4.)
It should be loaded at address 0x10000 for Image/zImage kernels and
0x100000 for bzImage kernels.
The kernel is a bzImage kernel if the protocol >= 2.00 and the 0x01
bit (LOAD_HIGH) in the loadflags field is set:
is_bzImage = (protocol >= 0x0200) && (loadflags & 0x01);
load_address = is_bzImage ? 0x100000 : 0x10000;
Note that Image/zImage kernels can be up to 512K in size, and thus use
the entire 0x10000-0x90000 range of memory. This means it is pretty
much a requirement for these kernels to load the real-mode part at
0x90000. bzImage kernels allow much more flexibility.
**** SPECIAL COMMAND LINE OPTIONS
If the command line provided by the boot loader is entered by the
user, the user may expect the following command line options to work.
They should normally not be deleted from the kernel command line even
though not all of them are actually meaningful to the kernel. Boot
loader authors who need additional command line options for the boot
loader itself should get them registered in
Documentation/kernel-parameters.txt to make sure they will not
conflict with actual kernel options now or in the future.
vga=<mode>
<mode> here is either an integer (in C notation, either
decimal, octal, or hexadecimal) or one of the strings
"normal" (meaning 0xFFFF), "ext" (meaning 0xFFFE) or "ask"
(meaning 0xFFFD). This value should be entered into the
vid_mode field, as it is used by the kernel before the command
line is parsed.
mem=<size>
<size> is an integer in C notation optionally followed by
(case insensitive) K, M, G, T, P or E (meaning << 10, << 20,
<< 30, << 40, << 50 or << 60). This specifies the end of
memory to the kernel. This affects the possible placement of
an initrd, since an initrd should be placed near end of
memory. Note that this is an option to *both* the kernel and
the bootloader!
initrd=<file>
An initrd should be loaded. The meaning of <file> is
obviously bootloader-dependent, and some boot loaders
(e.g. LILO) do not have such a command.
In addition, some boot loaders add the following options to the
user-specified command line:
BOOT_IMAGE=<file>
The boot image which was loaded. Again, the meaning of <file>
is obviously bootloader-dependent.
auto
The kernel was booted without explicit user intervention.
If these options are added by the boot loader, it is highly
recommended that they are located *first*, before the user-specified
or configuration-specified command line. Otherwise, "init=/bin/sh"
gets confused by the "auto" option.
**** RUNNING THE KERNEL
The kernel is started by jumping to the kernel entry point, which is
located at *segment* offset 0x20 from the start of the real mode
kernel. This means that if you loaded your real-mode kernel code at
0x90000, the kernel entry point is 9020:0000.
At entry, ds = es = ss should point to the start of the real-mode
kernel code (0x9000 if the code is loaded at 0x90000), sp should be
set up properly, normally pointing to the top of the heap, and
interrupts should be disabled. Furthermore, to guard against bugs in
the kernel, it is recommended that the boot loader sets fs = gs = ds =
es = ss.
In our example from above, we would do:
/* Note: in the case of the "old" kernel protocol, base_ptr must
be == 0x90000 at this point; see the previous sample code */
seg = base_ptr >> 4;
cli(); /* Enter with interrupts disabled! */
/* Set up the real-mode kernel stack */
_SS = seg;
_SP = heap_end;
_DS = _ES = _FS = _GS = seg;
jmp_far(seg+0x20, 0); /* Run the kernel */
If your boot sector accesses a floppy drive, it is recommended to
switch off the floppy motor before running the kernel, since the
kernel boot leaves interrupts off and thus the motor will not be
switched off, especially if the loaded kernel has the floppy driver as
a demand-loaded module!
**** ADVANCED BOOT LOADER HOOKS
If the boot loader runs in a particularly hostile environment (such as
LOADLIN, which runs under DOS) it may be impossible to follow the
standard memory location requirements. Such a boot loader may use the
following hooks that, if set, are invoked by the kernel at the
appropriate time. The use of these hooks should probably be
considered an absolutely last resort!
IMPORTANT: All the hooks are required to preserve %esp, %ebp, %esi and
%edi across invocation.
realmode_swtch:
A 16-bit real mode far subroutine invoked immediately before
entering protected mode. The default routine disables NMI, so
your routine should probably do so, too.
code32_start:
A 32-bit flat-mode routine *jumped* to immediately after the
transition to protected mode, but before the kernel is
uncompressed. No segments, except CS, are guaranteed to be
set up (current kernels do, but older ones do not); you should
set them up to BOOT_DS (0x18) yourself.
After completing your hook, you should jump to the address
that was in this field before your boot loader overwrote it
(relocated, if appropriate.)
**** 32-bit BOOT PROTOCOL
For machine with some new BIOS other than legacy BIOS, such as EFI,
LinuxBIOS, etc, and kexec, the 16-bit real mode setup code in kernel
based on legacy BIOS can not be used, so a 32-bit boot protocol needs
to be defined.
In 32-bit boot protocol, the first step in loading a Linux kernel
should be to setup the boot parameters (struct boot_params,
traditionally known as "zero page"). The memory for struct boot_params
should be allocated and initialized to all zero. Then the setup header
from offset 0x01f1 of kernel image on should be loaded into struct
boot_params and examined. The end of setup header can be calculated as
follow:
0x0202 + byte value at offset 0x0201
In addition to read/modify/write the setup header of the struct
boot_params as that of 16-bit boot protocol, the boot loader should
also fill the additional fields of the struct boot_params as that
described in zero-page.txt.
After setupping the struct boot_params, the boot loader can load the
32/64-bit kernel in the same way as that of 16-bit boot protocol.
In 32-bit boot protocol, the kernel is started by jumping to the
32-bit kernel entry point, which is the start address of loaded
32/64-bit kernel.
At entry, the CPU must be in 32-bit protected mode with paging
disabled; a GDT must be loaded with the descriptors for selectors
__BOOT_CS(0x10) and __BOOT_DS(0x18); both descriptors must be 4G flat
segment; __BOOS_CS must have execute/read permission, and __BOOT_DS
must have read/write permission; CS must be __BOOT_CS and DS, ES, SS
must be __BOOT_DS; interrupt must be disabled; %esi must hold the base
address of the struct boot_params; %ebp, %edi and %ebx must be zero.

305
Documentation/x86/mtrr.txt Normal file
View File

@ -0,0 +1,305 @@
MTRR (Memory Type Range Register) control
3 Jun 1999
Richard Gooch
<rgooch@atnf.csiro.au>
On Intel P6 family processors (Pentium Pro, Pentium II and later)
the Memory Type Range Registers (MTRRs) may be used to control
processor access to memory ranges. This is most useful when you have
a video (VGA) card on a PCI or AGP bus. Enabling write-combining
allows bus write transfers to be combined into a larger transfer
before bursting over the PCI/AGP bus. This can increase performance
of image write operations 2.5 times or more.
The Cyrix 6x86, 6x86MX and M II processors have Address Range
Registers (ARRs) which provide a similar functionality to MTRRs. For
these, the ARRs are used to emulate the MTRRs.
The AMD K6-2 (stepping 8 and above) and K6-3 processors have two
MTRRs. These are supported. The AMD Athlon family provide 8 Intel
style MTRRs.
The Centaur C6 (WinChip) has 8 MCRs, allowing write-combining. These
are supported.
The VIA Cyrix III and VIA C3 CPUs offer 8 Intel style MTRRs.
The CONFIG_MTRR option creates a /proc/mtrr file which may be used
to manipulate your MTRRs. Typically the X server should use
this. This should have a reasonably generic interface so that
similar control registers on other processors can be easily
supported.
There are two interfaces to /proc/mtrr: one is an ASCII interface
which allows you to read and write. The other is an ioctl()
interface. The ASCII interface is meant for administration. The
ioctl() interface is meant for C programs (i.e. the X server). The
interfaces are described below, with sample commands and C code.
===============================================================================
Reading MTRRs from the shell:
% cat /proc/mtrr
reg00: base=0x00000000 ( 0MB), size= 128MB: write-back, count=1
reg01: base=0x08000000 ( 128MB), size= 64MB: write-back, count=1
===============================================================================
Creating MTRRs from the C-shell:
# echo "base=0xf8000000 size=0x400000 type=write-combining" >! /proc/mtrr
or if you use bash:
# echo "base=0xf8000000 size=0x400000 type=write-combining" >| /proc/mtrr
And the result thereof:
% cat /proc/mtrr
reg00: base=0x00000000 ( 0MB), size= 128MB: write-back, count=1
reg01: base=0x08000000 ( 128MB), size= 64MB: write-back, count=1
reg02: base=0xf8000000 (3968MB), size= 4MB: write-combining, count=1
This is for video RAM at base address 0xf8000000 and size 4 megabytes. To
find out your base address, you need to look at the output of your X
server, which tells you where the linear framebuffer address is. A
typical line that you may get is:
(--) S3: PCI: 968 rev 0, Linear FB @ 0xf8000000
Note that you should only use the value from the X server, as it may
move the framebuffer base address, so the only value you can trust is
that reported by the X server.
To find out the size of your framebuffer (what, you don't actually
know?), the following line will tell you:
(--) S3: videoram: 4096k
That's 4 megabytes, which is 0x400000 bytes (in hexadecimal).
A patch is being written for XFree86 which will make this automatic:
in other words the X server will manipulate /proc/mtrr using the
ioctl() interface, so users won't have to do anything. If you use a
commercial X server, lobby your vendor to add support for MTRRs.
===============================================================================
Creating overlapping MTRRs:
%echo "base=0xfb000000 size=0x1000000 type=write-combining" >/proc/mtrr
%echo "base=0xfb000000 size=0x1000 type=uncachable" >/proc/mtrr
And the results: cat /proc/mtrr
reg00: base=0x00000000 ( 0MB), size= 64MB: write-back, count=1
reg01: base=0xfb000000 (4016MB), size= 16MB: write-combining, count=1
reg02: base=0xfb000000 (4016MB), size= 4kB: uncachable, count=1
Some cards (especially Voodoo Graphics boards) need this 4 kB area
excluded from the beginning of the region because it is used for
registers.
NOTE: You can only create type=uncachable region, if the first
region that you created is type=write-combining.
===============================================================================
Removing MTRRs from the C-shell:
% echo "disable=2" >! /proc/mtrr
or using bash:
% echo "disable=2" >| /proc/mtrr
===============================================================================
Reading MTRRs from a C program using ioctl()'s:
/* mtrr-show.c
Source file for mtrr-show (example program to show MTRRs using ioctl()'s)
Copyright (C) 1997-1998 Richard Gooch
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
Richard Gooch may be reached by email at rgooch@atnf.csiro.au
The postal address is:
Richard Gooch, c/o ATNF, P. O. Box 76, Epping, N.S.W., 2121, Australia.
*/
/*
This program will use an ioctl() on /proc/mtrr to show the current MTRR
settings. This is an alternative to reading /proc/mtrr.
Written by Richard Gooch 17-DEC-1997
Last updated by Richard Gooch 2-MAY-1998
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <sys/ioctl.h>
#include <errno.h>
#include <asm/mtrr.h>
#define TRUE 1
#define FALSE 0
#define ERRSTRING strerror (errno)
static char *mtrr_strings[MTRR_NUM_TYPES] =
{
"uncachable", /* 0 */
"write-combining", /* 1 */
"?", /* 2 */
"?", /* 3 */
"write-through", /* 4 */
"write-protect", /* 5 */
"write-back", /* 6 */
};
int main ()
{
int fd;
struct mtrr_gentry gentry;
if ( ( fd = open ("/proc/mtrr", O_RDONLY, 0) ) == -1 )
{
if (errno == ENOENT)
{
fputs ("/proc/mtrr not found: not supported or you don't have a PPro?\n",
stderr);
exit (1);
}
fprintf (stderr, "Error opening /proc/mtrr\t%s\n", ERRSTRING);
exit (2);
}
for (gentry.regnum = 0; ioctl (fd, MTRRIOC_GET_ENTRY, &gentry) == 0;
++gentry.regnum)
{
if (gentry.size < 1)
{
fprintf (stderr, "Register: %u disabled\n", gentry.regnum);
continue;
}
fprintf (stderr, "Register: %u base: 0x%lx size: 0x%lx type: %s\n",
gentry.regnum, gentry.base, gentry.size,
mtrr_strings[gentry.type]);
}
if (errno == EINVAL) exit (0);
fprintf (stderr, "Error doing ioctl(2) on /dev/mtrr\t%s\n", ERRSTRING);
exit (3);
} /* End Function main */
===============================================================================
Creating MTRRs from a C programme using ioctl()'s:
/* mtrr-add.c
Source file for mtrr-add (example programme to add an MTRRs using ioctl())
Copyright (C) 1997-1998 Richard Gooch
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
Richard Gooch may be reached by email at rgooch@atnf.csiro.au
The postal address is:
Richard Gooch, c/o ATNF, P. O. Box 76, Epping, N.S.W., 2121, Australia.
*/
/*
This programme will use an ioctl() on /proc/mtrr to add an entry. The first
available mtrr is used. This is an alternative to writing /proc/mtrr.
Written by Richard Gooch 17-DEC-1997
Last updated by Richard Gooch 2-MAY-1998
*/
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <sys/ioctl.h>
#include <errno.h>
#include <asm/mtrr.h>
#define TRUE 1
#define FALSE 0
#define ERRSTRING strerror (errno)
static char *mtrr_strings[MTRR_NUM_TYPES] =
{
"uncachable", /* 0 */
"write-combining", /* 1 */
"?", /* 2 */
"?", /* 3 */
"write-through", /* 4 */
"write-protect", /* 5 */
"write-back", /* 6 */
};
int main (int argc, char **argv)
{
int fd;
struct mtrr_sentry sentry;
if (argc != 4)
{
fprintf (stderr, "Usage:\tmtrr-add base size type\n");
exit (1);
}
sentry.base = strtoul (argv[1], NULL, 0);
sentry.size = strtoul (argv[2], NULL, 0);
for (sentry.type = 0; sentry.type < MTRR_NUM_TYPES; ++sentry.type)
{
if (strcmp (argv[3], mtrr_strings[sentry.type]) == 0) break;
}
if (sentry.type >= MTRR_NUM_TYPES)
{
fprintf (stderr, "Illegal type: \"%s\"\n", argv[3]);
exit (2);
}
if ( ( fd = open ("/proc/mtrr", O_WRONLY, 0) ) == -1 )
{
if (errno == ENOENT)
{
fputs ("/proc/mtrr not found: not supported or you don't have a PPro?\n",
stderr);
exit (3);
}
fprintf (stderr, "Error opening /proc/mtrr\t%s\n", ERRSTRING);
exit (4);
}
if (ioctl (fd, MTRRIOC_ADD_ENTRY, &sentry) == -1)
{
fprintf (stderr, "Error doing ioctl(2) on /dev/mtrr\t%s\n", ERRSTRING);
exit (5);
}
fprintf (stderr, "Sleeping for 5 seconds so you can see the new entry\n");
sleep (5);
close (fd);
fputs ("I've just closed /proc/mtrr so now the new entry should be gone\n",
stderr);
} /* End Function main */
===============================================================================

54
Documentation/x86/pat.txt
View File

@ -14,6 +14,10 @@ PAT allows for different types of memory attributes. The most commonly used
ones that will be supported at this time are Write-back, Uncached,
Write-combined and Uncached Minus.
PAT APIs
--------
There are many different APIs in the kernel that allows setting of memory
attributes at the page level. In order to avoid aliasing, these interfaces
should be used thoughtfully. Below is a table of interfaces available,
@ -26,38 +30,38 @@ address range to avoid any aliasing.
API | RAM | ACPI,... | Reserved/Holes |
-----------------------|----------|------------|------------------|
| | | |
ioremap | -- | UC | UC |
ioremap | -- | UC- | UC- |
| | | |
ioremap_cache | -- | WB | WB |
| | | |
ioremap_nocache | -- | UC | UC |
ioremap_nocache | -- | UC- | UC- |
| | | |
ioremap_wc | -- | -- | WC |
| | | |
set_memory_uc | UC | -- | -- |
set_memory_uc | UC- | -- | -- |
set_memory_wb | | | |
| | | |
set_memory_wc | WC | -- | -- |
set_memory_wb | | | |
| | | |
pci sysfs resource | -- | -- | UC |
pci sysfs resource | -- | -- | UC- |
| | | |
pci sysfs resource_wc | -- | -- | WC |
is IORESOURCE_PREFETCH| | | |
| | | |
pci proc | -- | -- | UC |
pci proc | -- | -- | UC- |
!PCIIOC_WRITE_COMBINE | | | |
| | | |
pci proc | -- | -- | WC |
PCIIOC_WRITE_COMBINE | | | |
| | | |
/dev/mem | -- | UC | UC |
/dev/mem | -- | WB/WC/UC- | WB/WC/UC- |
read-write | | | |
| | | |
/dev/mem | -- | UC | UC |
/dev/mem | -- | UC- | UC- |
mmap SYNC flag | | | |
| | | |
/dev/mem | -- | WB/WC/UC | WB/WC/UC |
/dev/mem | -- | WB/WC/UC- | WB/WC/UC- |
mmap !SYNC flag | |(from exist-| (from exist- |
and | | ing alias)| ing alias) |
any alias to this area| | | |
@ -68,7 +72,7 @@ pci proc | -- | -- | WC |
and | | | |
MTRR says WB | | | |
| | | |
/dev/mem | -- | -- | UC_MINUS |
/dev/mem | -- | -- | UC- |
mmap !SYNC flag | | | |
no alias to this area | | | |
and | | | |
@ -98,3 +102,35 @@ types.
Drivers should use set_memory_[uc|wc] to set access type for RAM ranges.
PAT debugging
-------------
With CONFIG_DEBUG_FS enabled, PAT memtype list can be examined by
# mount -t debugfs debugfs /sys/kernel/debug
# cat /sys/kernel/debug/x86/pat_memtype_list
PAT memtype list:
uncached-minus @ 0x7fadf000-0x7fae0000
uncached-minus @ 0x7fb19000-0x7fb1a000
uncached-minus @ 0x7fb1a000-0x7fb1b000
uncached-minus @ 0x7fb1b000-0x7fb1c000
uncached-minus @ 0x7fb1c000-0x7fb1d000
uncached-minus @ 0x7fb1d000-0x7fb1e000
uncached-minus @ 0x7fb1e000-0x7fb25000
uncached-minus @ 0x7fb25000-0x7fb26000
uncached-minus @ 0x7fb26000-0x7fb27000
uncached-minus @ 0x7fb27000-0x7fb28000
uncached-minus @ 0x7fb28000-0x7fb2e000
uncached-minus @ 0x7fb2e000-0x7fb2f000
uncached-minus @ 0x7fb2f000-0x7fb30000
uncached-minus @ 0x7fb31000-0x7fb32000
uncached-minus @ 0x80000000-0x90000000
This list shows physical address ranges and various PAT settings used to
access those physical address ranges.
Another, more verbose way of getting PAT related debug messages is with
"debugpat" boot parameter. With this parameter, various debug messages are
printed to dmesg log.

0
Documentation/x86/i386/usb-legacy-support.txt → Documentation/x86/usb-legacy-support.txt
View File

4
Documentation/x86/x86_64/boot-options.txt
View File

@ -54,10 +54,6 @@ APICs
apicmaintimer. Useful when your PIT timer is totally
broken.
disable_8254_timer / enable_8254_timer
Enable interrupt 0 timer routing over the 8254 in addition to over
the IO-APIC. The kernel tries to set a sensible default.
Early Console
syntax: earlyprintk=vga

0
Documentation/x86/i386/zero-page.txt → Documentation/x86/zero-page.txt
View File

63
MAINTAINERS
View File

@ -387,6 +387,7 @@ AMD IOMMU (AMD-VI)
P: Joerg Roedel
M: joerg.roedel@amd.com
L: iommu@lists.linux-foundation.org
T: git://git.kernel.org/pub/scm/linux/kernel/git/joro/linux-2.6-iommu.git
S: Supported
AMS (Apple Motion Sensor) DRIVER
@ -466,6 +467,12 @@ M: kernel@wantstofly.org
L: linux-arm-kernel@lists.arm.linux.org.uk (subscribers-only)
S: Maintained
ARM/AFEB9260 MACHINE SUPPORT
P: Sergey Lapin
M: slapin@ossfans.org
L: linux-arm-kernel@lists.arm.linux.org.uk (subscribers-only)
S: Maintained
ARM/AJECO 1ARM MACHINE SUPPORT
P: Lennert Buytenhek
M: kernel@wantstofly.org
@ -491,7 +498,7 @@ M: kernel@wantstofly.org
L: linux-arm-kernel@lists.arm.linux.org.uk (subscribers-only)
S: Maintained
ARM/COMPULAB CM-X270/EM-X270 MACHINE SUPPORT
ARM/COMPULAB CM-X270/EM-X270 and CM-X300 MACHINE SUPPORT
P: Mike Rapoport
M: mike@compulab.co.il
L: linux-arm-kernel@lists.arm.linux.org.uk (subscribers-only)
@ -623,6 +630,12 @@ M: marek.vasut@gmail.com
W: http://hackndev.com
S: Maintained
ARM/PALMZ72 SUPPORT
P: Sergey Lapin
M: slapin@ossfans.org
W: http://hackndev.com
S: Maintained
ARM/PLEB SUPPORT
P: Peter Chubb
M: pleb@gelato.unsw.edu.au
@ -1048,6 +1061,13 @@ L: cbe-oss-dev@ozlabs.org
W: http://www.ibm.com/developerworks/power/cell/
S: Supported
CISCO 10G ETHERNET DRIVER
P: Scott Feldman
M: scofeldm@cisco.com
P: Joe Eykholt
M: jeykholt@cisco.com
S: Supported
CFAG12864B LCD DRIVER
P: Miguel Ojeda Sandonis
M: miguel.ojeda.sandonis@gmail.com
@ -1198,9 +1218,7 @@ M: hpa@zytor.com
S: Maintained
CPUSETS
P: Paul Jackson
P: Paul Menage
M: pj@sgi.com
M: menage@google.com
L: linux-kernel@vger.kernel.org
W: http://www.bullopensource.org/cpuset/
@ -1641,9 +1659,10 @@ L: linux-ext4@vger.kernel.org
S: Maintained
EXT4 FILE SYSTEM
P: Stephen Tweedie, Andrew Morton
M: sct@redhat.com, akpm@linux-foundation.org, adilger@sun.com
P: Theodore Ts'o
M: tytso@mit.edu, adilger@sun.com
L: linux-ext4@vger.kernel.org
W: http://ext4.wiki.kernel.org
S: Maintained
F71805F HARDWARE MONITORING DRIVER
@ -1984,7 +2003,7 @@ S: Maintained
I2C/SMBUS STUB DRIVER
P: Mark M. Hoffman
M: mhoffman@lightlink.com
L: lm-sensors@lm-sensors.org
L: i2c@lm-sensors.org
S: Maintained
I2C SUBSYSTEM
@ -2321,6 +2340,12 @@ L: video4linux-list@redhat.com
W: http://www.ivtvdriver.org
S: Maintained
JME NETWORK DRIVER
P: Guo-Fu Tseng
M: cooldavid@cooldavid.org
L: netdev@vger.kernel.org
S: Maintained
JOURNALLING FLASH FILE SYSTEM V2 (JFFS2)
P: David Woodhouse
M: dwmw2@infradead.org
@ -2706,6 +2731,7 @@ MAN-PAGES: MANUAL PAGES FOR LINUX -- Sections 2, 3, 4, 5, and 7
P: Michael Kerrisk
M: mtk.manpages@gmail.com
W: http://www.kernel.org/doc/man-pages
L: linux-man@vger.kernel.org
S: Supported
MARVELL LIBERTAS WIRELESS DRIVER
@ -3385,6 +3411,13 @@ M: linux-driver@qlogic.com
L: netdev@vger.kernel.org
S: Supported
QLOGIC QLGE 10Gb ETHERNET DRIVER
P: Ron Mercer
M: linux-driver@qlogic.com
M: ron.mercer@qlogic.com
L: netdev@vger.kernel.org
S: Supported
QNX4 FILESYSTEM
P: Anders Larsen
M: al@alarsen.net
@ -3650,8 +3683,9 @@ M: jmorris@namei.org
P: Eric Paris
M: eparis@parisplace.org
L: linux-kernel@vger.kernel.org (kernel issues)
L: selinux@tycho.nsa.gov (subscribers-only, general discussion)
W: http://www.nsa.gov/selinux
L: selinux@tycho.nsa.gov (subscribers-only, general discussion)
W: http://selinuxproject.org
T: git kernel.org:pub/scm/linux/kernel/git/jmorris/security-testing-2.6.git
S: Supported
SENSABLE PHANTOM
@ -3726,7 +3760,7 @@ S: Maintained
SIS 96X I2C/SMBUS DRIVER
P: Mark M. Hoffman
M: mhoffman@lightlink.com
L: lm-sensors@lm-sensors.org
L: i2c@lm-sensors.org
S: Maintained
SIS FRAMEBUFFER DRIVER
@ -3828,16 +3862,19 @@ S: Maintained
SOUND
P: Jaroslav Kysela
M: perex@perex.cz
P: Takashi Iwai
M: tiwai@suse.de
L: alsa-devel@alsa-project.org (subscribers-only)
S: Maintained
SOUND - SOC LAYER / DYNAMIC AUDIO POWER MANAGEMENT
P: Liam Girdwood
M: liam.girdwood@wolfsonmicro.com
M: lrg@slimlogic.co.uk
P: Mark Brown
M: broonie@opensource.wolfsonmicro.com
T: git opensource.wolfsonmicro.com/linux-2.6-asoc
L: alsa-devel@alsa-project.org (subscribers-only)
W: http://alsa-project.org/main/index.php/ASoC
S: Supported
SPI SUBSYSTEM
@ -4333,6 +4370,12 @@ L: linux-usb@vger.kernel.org
W: http://www.connecttech.com
S: Supported
USB SMSC95XX ETHERNET DRIVER
P: Steve Glendinning
M: steve.glendinning@smsc.com
L: netdev@vger.kernel.org
S: Supported
USB SN9C1xx DRIVER
P: Luca Risolia
M: luca.risolia@studio.unibo.it

2
Makefile
View File

@ -1,7 +1,7 @@
VERSION = 2
PATCHLEVEL = 6
SUBLEVEL = 27
EXTRAVERSION = -rc7
EXTRAVERSION =
NAME = Rotary Wombat
# *DOCUMENTATION*

3
arch/alpha/kernel/smp.c
View File

@ -149,6 +149,9 @@ smp_callin(void)
atomic_inc(&init_mm.mm_count);
current->active_mm = &init_mm;
/* inform the notifiers about the new cpu */
notify_cpu_starting(cpuid);
/* Must have completely accurate bogos. */
local_irq_enable();

74
arch/arm/Kconfig
View File

@ -148,7 +148,6 @@ config ARCH_MAY_HAVE_PC_FDC
config ZONE_DMA
bool
default y
config GENERIC_ISA_DMA
bool
@ -178,6 +177,11 @@ config OPROFILE_MPCORE
config OPROFILE_ARM11_CORE
bool
config OPROFILE_ARMV7
def_bool y
depends on CPU_V7 && !SMP
bool
endif
config VECTORS_BASE
@ -245,6 +249,7 @@ config ARCH_CLPS7500
select TIMER_ACORN
select ISA
select NO_IOPORT
select ARCH_SPARSEMEM_ENABLE
help
Support for the Cirrus Logic PS7500FE system-on-a-chip.
@ -306,6 +311,7 @@ config ARCH_IOP13XX
select PLAT_IOP
select PCI
select ARCH_SUPPORTS_MSI
select VMSPLIT_1G
help
Support for Intel's IOP13XX (XScale) family of processors.
@ -350,6 +356,7 @@ config ARCH_IXP4XX
select GENERIC_GPIO
select GENERIC_TIME
select GENERIC_CLOCKEVENTS
select ZONE_DMA if PCI
help
Support for Intel's IXP4XX (XScale) family of processors.
@ -434,7 +441,7 @@ config ARCH_ORION5X
help
Support for the following Marvell Orion 5x series SoCs:
Orion-1 (5181), Orion-VoIP (5181L), Orion-NAS (5182),
Orion-2 (5281).
Orion-2 (5281), Orion-1-90 (6183).
config ARCH_PNX4008
bool "Philips Nexperia PNX4008 Mobile"
@ -464,6 +471,7 @@ config ARCH_RPC
select HAVE_PATA_PLATFORM
select ISA_DMA_API
select NO_IOPORT
select ARCH_SPARSEMEM_ENABLE
help
On the Acorn Risc-PC, Linux can support the internal IDE disk and
CD-ROM interface, serial and parallel port, and the floppy drive.
@ -471,9 +479,7 @@ config ARCH_RPC
config ARCH_SA1100
bool "SA1100-based"
select ISA
select ARCH_DISCONTIGMEM_ENABLE
select ARCH_SPARSEMEM_ENABLE
select ARCH_SELECT_MEMORY_MODEL
select ARCH_MTD_XIP
select GENERIC_GPIO
select GENERIC_TIME
@ -497,6 +503,7 @@ config ARCH_SHARK
bool "Shark"
select ISA
select ISA_DMA
select ZONE_DMA
select PCI
help
Support for the StrongARM based Digital DNARD machine, also known
@ -504,6 +511,8 @@ config ARCH_SHARK
config ARCH_LH7A40X
bool "Sharp LH7A40X"
select ARCH_DISCONTIGMEM_ENABLE if !LH7A40X_CONTIGMEM
select ARCH_SPARSEMEM_ENABLE if !LH7A40X_CONTIGMEM
help
Say Y here for systems based on one of the Sharp LH7A40X
System on a Chip processors. These CPUs include an ARM922T
@ -515,7 +524,9 @@ config ARCH_DAVINCI
select GENERIC_TIME
select GENERIC_CLOCKEVENTS
select GENERIC_GPIO
select ARCH_REQUIRE_GPIOLIB
select HAVE_CLK
select ZONE_DMA
help
Support for TI's DaVinci platform.
@ -734,6 +745,29 @@ config SMP
If you don't know what to do here, say N.
choice
prompt "Memory split"
default VMSPLIT_3G
help
Select the desired split between kernel and user memory.
If you are not absolutely sure what you are doing, leave this
option alone!
config VMSPLIT_3G
bool "3G/1G user/kernel split"
config VMSPLIT_2G
bool "2G/2G user/kernel split"
config VMSPLIT_1G
bool "1G/3G user/kernel split"
endchoice
config PAGE_OFFSET
hex
default 0x40000000 if VMSPLIT_1G
default 0x80000000 if VMSPLIT_2G
default 0xC0000000
config NR_CPUS
int "Maximum number of CPUs (2-32)"
range 2 32
@ -815,20 +849,18 @@ config ARCH_FLATMEM_HAS_HOLES
default y
depends on FLATMEM
# Discontigmem is deprecated
config ARCH_DISCONTIGMEM_ENABLE
bool
default (ARCH_LH7A40X && !LH7A40X_CONTIGMEM)
help
Say Y to support efficient handling of discontiguous physical memory,
for architectures which are either NUMA (Non-Uniform Memory Access)
or have huge holes in the physical address space for other reasons.
See <file:Documentation/vm/numa> for more.
config ARCH_SPARSEMEM_ENABLE
bool
config ARCH_SPARSEMEM_DEFAULT
def_bool ARCH_SPARSEMEM_ENABLE
config ARCH_SELECT_MEMORY_MODEL
bool
def_bool ARCH_DISCONTIGMEM_ENABLE && ARCH_SPARSEMEM_ENABLE
config NODES_SHIFT
int
@ -845,7 +877,7 @@ config LEDS
ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
ARCH_AT91 || MACH_TRIZEPS4 || ARCH_DAVINCI || \
ARCH_AT91 || ARCH_DAVINCI || \
ARCH_KS8695 || MACH_RD88F5182
help
If you say Y here, the LEDs on your machine will be used
@ -1005,9 +1037,9 @@ config ATAGS_PROC
endmenu
if (ARCH_SA1100 || ARCH_INTEGRATOR || ARCH_OMAP || ARCH_IMX || ARCH_PXA)
menu "CPU Power Management"
menu "CPU Frequency scaling"
if (ARCH_SA1100 || ARCH_INTEGRATOR || ARCH_OMAP || ARCH_IMX || ARCH_PXA)
source "drivers/cpufreq/Kconfig"
@ -1047,10 +1079,12 @@ config CPU_FREQ_PXA
default y
select CPU_FREQ_DEFAULT_GOV_USERSPACE
endmenu
endif
source "drivers/cpuidle/Kconfig"
endmenu
menu "Floating point emulation"
comment "At least one emulation must be selected"
@ -1202,6 +1236,8 @@ source "drivers/power/Kconfig"
source "drivers/hwmon/Kconfig"
source "drivers/thermal/Kconfig"
source "drivers/watchdog/Kconfig"
source "drivers/ssb/Kconfig"
@ -1222,6 +1258,10 @@ source "drivers/usb/Kconfig"
source "drivers/mmc/Kconfig"
source "drivers/memstick/Kconfig"
source "drivers/accessibility/Kconfig"
source "drivers/leds/Kconfig"
source "drivers/rtc/Kconfig"
@ -1230,6 +1270,8 @@ source "drivers/dma/Kconfig"
source "drivers/dca/Kconfig"
source "drivers/auxdisplay/Kconfig"
source "drivers/regulator/Kconfig"
source "drivers/uio/Kconfig"

2
arch/arm/Makefile
View File

@ -47,7 +47,7 @@ comma = ,
# Note that GCC does not numerically define an architecture version
# macro, but instead defines a whole series of macros which makes
# testing for a specific architecture or later rather impossible.
arch-$(CONFIG_CPU_32v7) :=-D__LINUX_ARM_ARCH__=7 $(call cc-option,-march=armv7a,-march=armv5t -Wa$(comma)-march=armv7a)
arch-$(CONFIG_CPU_32v7) :=-D__LINUX_ARM_ARCH__=7 $(call cc-option,-march=armv7-a,-march=armv5t -Wa$(comma)-march=armv7-a)
arch-$(CONFIG_CPU_32v6) :=-D__LINUX_ARM_ARCH__=6 $(call cc-option,-march=armv6,-march=armv5t -Wa$(comma)-march=armv6)
# Only override the compiler option if ARMv6. The ARMv6K extensions are
# always available in ARMv7

2
arch/arm/boot/compressed/Makefile
View File

@ -76,7 +76,7 @@ KBUILD_CFLAGS = $(subst -pg, , $(ORIG_CFLAGS))
endif
EXTRA_CFLAGS := -fpic -fno-builtin
EXTRA_AFLAGS :=
EXTRA_AFLAGS := -Wa,-march=all
# Supply ZRELADDR, INITRD_PHYS and PARAMS_PHYS to the decompressor via
# linker symbols. We only define initrd_phys and params_phys if the

3
arch/arm/boot/compressed/head.S
View File

@ -421,6 +421,7 @@ __setup_mmu: sub r3, r4, #16384 @ Page directory size
add r1, r1, #1048576
str r1, [r0]
mov pc, lr
ENDPROC(__setup_mmu)
__armv4_mmu_cache_on:
mov r12, lr
@ -801,7 +802,7 @@ loop1:
add r2, r2, #4 @ add 4 (line length offset)
ldr r4, =0x3ff
ands r4, r4, r1, lsr #3 @ find maximum number on the way size
.word 0xe16f5f14 @ clz r5, r4 - find bit position of way size increment
clz r5, r4 @ find bit position of way size increment
ldr r7, =0x7fff
ands r7, r7, r1, lsr #13 @ extract max number of the index size
loop2:

3
arch/arm/common/Kconfig
View File

@ -12,7 +12,8 @@ config ICST307
config SA1111
bool
select DMABOUNCE
select DMABOUNCE if !ARCH_PXA
select ZONE_DMA if !ARCH_PXA
config DMABOUNCE
bool

297
arch/arm/common/dmabounce.c
View File

@ -154,9 +154,7 @@ alloc_safe_buffer(struct dmabounce_device_info *device_info, void *ptr,
#endif
write_lock_irqsave(&device_info->lock, flags);
list_add(&buf->node, &device_info->safe_buffers);
write_unlock_irqrestore(&device_info->lock, flags);
return buf;
@ -205,8 +203,22 @@ free_safe_buffer(struct dmabounce_device_info *device_info, struct safe_buffer *
/* ************************************************** */
static inline dma_addr_t
map_single(struct device *dev, void *ptr, size_t size,
static struct safe_buffer *find_safe_buffer_dev(struct device *dev,
dma_addr_t dma_addr, const char *where)
{
if (!dev || !dev->archdata.dmabounce)
return NULL;
if (dma_mapping_error(dev, dma_addr)) {
if (dev)
dev_err(dev, "Trying to %s invalid mapping\n", where);
else
pr_err("unknown device: Trying to %s invalid mapping\n", where);
return NULL;
}
return find_safe_buffer(dev->archdata.dmabounce, dma_addr);
}
static inline dma_addr_t map_single(struct device *dev, void *ptr, size_t size,
enum dma_data_direction dir)
{
struct dmabounce_device_info *device_info = dev->archdata.dmabounce;
@ -270,33 +282,21 @@ map_single(struct device *dev, void *ptr, size_t size,
return dma_addr;
}
static inline void
unmap_single(struct device *dev, dma_addr_t dma_addr, size_t size,
enum dma_data_direction dir)
static inline void unmap_single(struct device *dev, dma_addr_t dma_addr,
size_t size, enum dma_data_direction dir)
{
struct dmabounce_device_info *device_info = dev->archdata.dmabounce;
struct safe_buffer *buf = NULL;
/*
* Trying to unmap an invalid mapping
*/
if (dma_mapping_error(dev, dma_addr)) {
dev_err(dev, "Trying to unmap invalid mapping\n");
return;
}
if (device_info)
buf = find_safe_buffer(device_info, dma_addr);
struct safe_buffer *buf = find_safe_buffer_dev(dev, dma_addr, "unmap");
if (buf) {
BUG_ON(buf->size != size);
BUG_ON(buf->direction != dir);
dev_dbg(dev,
"%s: unsafe buffer %p (dma=%#x) mapped to %p (dma=%#x)\n",
__func__, buf->ptr, virt_to_dma(dev, buf->ptr),
buf->safe, buf->safe_dma_addr);
DO_STATS ( device_info->bounce_count++ );
DO_STATS(dev->archdata.dmabounce->bounce_count++);
if (dir == DMA_FROM_DEVICE || dir == DMA_BIDIRECTIONAL) {
void *ptr = buf->ptr;
@ -317,74 +317,7 @@ unmap_single(struct device *dev, dma_addr_t dma_addr, size_t size,
dmac_clean_range(ptr, ptr + size);
outer_clean_range(__pa(ptr), __pa(ptr) + size);
}
free_safe_buffer(device_info, buf);
}
}
static int sync_single(struct device *dev, dma_addr_t dma_addr, size_t size,
enum dma_data_direction dir)
{
struct dmabounce_device_info *device_info = dev->archdata.dmabounce;
struct safe_buffer *buf = NULL;
if (device_info)
buf = find_safe_buffer(device_info, dma_addr);
if (buf) {
/*
* Both of these checks from original code need to be
* commented out b/c some drivers rely on the following:
*
* 1) Drivers may map a large chunk of memory into DMA space
* but only sync a small portion of it. Good example is
* allocating a large buffer, mapping it, and then
* breaking it up into small descriptors. No point
* in syncing the whole buffer if you only have to
* touch one descriptor.
*
* 2) Buffers that are mapped as DMA_BIDIRECTIONAL are
* usually only synced in one dir at a time.
*
* See drivers/net/eepro100.c for examples of both cases.
*
* -ds
*
* BUG_ON(buf->size != size);
* BUG_ON(buf->direction != dir);
*/
dev_dbg(dev,
"%s: unsafe buffer %p (dma=%#x) mapped to %p (dma=%#x)\n",
__func__, buf->ptr, virt_to_dma(dev, buf->ptr),
buf->safe, buf->safe_dma_addr);
DO_STATS ( device_info->bounce_count++ );
switch (dir) {
case DMA_FROM_DEVICE:
dev_dbg(dev,
"%s: copy back safe %p to unsafe %p size %d\n",
__func__, buf->safe, buf->ptr, size);
memcpy(buf->ptr, buf->safe, size);
break;
case DMA_TO_DEVICE:
dev_dbg(dev,
"%s: copy out unsafe %p to safe %p, size %d\n",
__func__,buf->ptr, buf->safe, size);
memcpy(buf->safe, buf->ptr, size);
break;
case DMA_BIDIRECTIONAL:
BUG(); /* is this allowed? what does it mean? */
default:
BUG();
}
/*
* No need to sync the safe buffer - it was allocated
* via the coherent allocators.
*/
return 0;
} else {
return 1;
free_safe_buffer(dev->archdata.dmabounce, buf);
}
}
@ -396,21 +329,29 @@ static int sync_single(struct device *dev, dma_addr_t dma_addr, size_t size,
* substitute the safe buffer for the unsafe one.
* (basically move the buffer from an unsafe area to a safe one)
*/
dma_addr_t
dma_map_single(struct device *dev, void *ptr, size_t size,
dma_addr_t dma_map_single(struct device *dev, void *ptr, size_t size,
enum dma_data_direction dir)
{
dma_addr_t dma_addr;
dev_dbg(dev, "%s(ptr=%p,size=%d,dir=%x)\n",
__func__, ptr, size, dir);
BUG_ON(dir == DMA_NONE);
BUG_ON(!valid_dma_direction(dir));
dma_addr = map_single(dev, ptr, size, dir);
return dma_addr;
return map_single(dev, ptr, size, dir);
}
EXPORT_SYMBOL(dma_map_single);
dma_addr_t dma_map_page(struct device *dev, struct page *page,
unsigned long offset, size_t size, enum dma_data_direction dir)
{
dev_dbg(dev, "%s(page=%p,off=%#lx,size=%zx,dir=%x)\n",
__func__, page, offset, size, dir);
BUG_ON(!valid_dma_direction(dir));
return map_single(dev, page_address(page) + offset, size, dir);
}
EXPORT_SYMBOL(dma_map_page);
/*
* see if a mapped address was really a "safe" buffer and if so, copy
@ -419,126 +360,76 @@ dma_map_single(struct device *dev, void *ptr, size_t size,
* should be)
*/
void
dma_unmap_single(struct device *dev, dma_addr_t dma_addr, size_t size,
enum dma_data_direction dir)
void dma_unmap_single(struct device *dev, dma_addr_t dma_addr, size_t size,
enum dma_data_direction dir)
{
dev_dbg(dev, "%s(ptr=%p,size=%d,dir=%x)\n",
__func__, (void *) dma_addr, size, dir);
BUG_ON(dir == DMA_NONE);
unmap_single(dev, dma_addr, size, dir);
}
EXPORT_SYMBOL(dma_unmap_single);
int
dma_map_sg(struct device *dev, struct scatterlist *sg, int nents,
enum dma_data_direction dir)
int dmabounce_sync_for_cpu(struct device *dev, dma_addr_t addr,
unsigned long off, size_t sz, enum dma_data_direction dir)
{
int i;
struct safe_buffer *buf;
dev_dbg(dev, "%s(sg=%p,nents=%d,dir=%x)\n",
__func__, sg, nents, dir);
dev_dbg(dev, "%s(dma=%#x,off=%#lx,sz=%zx,dir=%x)\n",
__func__, addr, off, sz, dir);
BUG_ON(dir == DMA_NONE);
buf = find_safe_buffer_dev(dev, addr, __func__);
if (!buf)
return 1;
for (i = 0; i < nents; i++, sg++) {
struct page *page = sg_page(sg);
unsigned int offset = sg->offset;
unsigned int length = sg->length;
void *ptr = page_address(page) + offset;
BUG_ON(buf->direction != dir);
sg->dma_address =
map_single(dev, ptr, length, dir);
dev_dbg(dev, "%s: unsafe buffer %p (dma=%#x) mapped to %p (dma=%#x)\n",
__func__, buf->ptr, virt_to_dma(dev, buf->ptr),
buf->safe, buf->safe_dma_addr);
DO_STATS(dev->archdata.dmabounce->bounce_count++);
if (dir == DMA_FROM_DEVICE || dir == DMA_BIDIRECTIONAL) {
dev_dbg(dev, "%s: copy back safe %p to unsafe %p size %d\n",
__func__, buf->safe + off, buf->ptr + off, sz);
memcpy(buf->ptr + off, buf->safe + off, sz);
}
return nents;
return 0;
}
EXPORT_SYMBOL(dmabounce_sync_for_cpu);
void
dma_unmap_sg(struct device *dev, struct scatterlist *sg, int nents,
enum dma_data_direction dir)
int dmabounce_sync_for_device(struct device *dev, dma_addr_t addr,
unsigned long off, size_t sz, enum dma_data_direction dir)
{
int i;
struct safe_buffer *buf;
dev_dbg(dev, "%s(sg=%p,nents=%d,dir=%x)\n",
__func__, sg, nents, dir);
dev_dbg(dev, "%s(dma=%#x,off=%#lx,sz=%zx,dir=%x)\n",
__func__, addr, off, sz, dir);
BUG_ON(dir == DMA_NONE);
buf = find_safe_buffer_dev(dev, addr, __func__);
if (!buf)
return 1;
for (i = 0; i < nents; i++, sg++) {
dma_addr_t dma_addr = sg->dma_address;
unsigned int length = sg->length;
BUG_ON(buf->direction != dir);
unmap_single(dev, dma_addr, length, dir);
dev_dbg(dev, "%s: unsafe buffer %p (dma=%#x) mapped to %p (dma=%#x)\n",
__func__, buf->ptr, virt_to_dma(dev, buf->ptr),
buf->safe, buf->safe_dma_addr);
DO_STATS(dev->archdata.dmabounce->bounce_count++);
if (dir == DMA_TO_DEVICE || dir == DMA_BIDIRECTIONAL) {
dev_dbg(dev, "%s: copy out unsafe %p to safe %p, size %d\n",
__func__,buf->ptr + off, buf->safe + off, sz);
memcpy(buf->safe + off, buf->ptr + off, sz);
}
return 0;
}
EXPORT_SYMBOL(dmabounce_sync_for_device);
void dma_sync_single_range_for_cpu(struct device *dev, dma_addr_t dma_addr,
unsigned long offset, size_t size,
enum dma_data_direction dir)
{
dev_dbg(dev, "%s(dma=%#x,off=%#lx,size=%zx,dir=%x)\n",
__func__, dma_addr, offset, size, dir);
if (sync_single(dev, dma_addr, offset + size, dir))
dma_cache_maint(dma_to_virt(dev, dma_addr) + offset, size, dir);
}
EXPORT_SYMBOL(dma_sync_single_range_for_cpu);
void dma_sync_single_range_for_device(struct device *dev, dma_addr_t dma_addr,
unsigned long offset, size_t size,
enum dma_data_direction dir)
{
dev_dbg(dev, "%s(dma=%#x,off=%#lx,size=%zx,dir=%x)\n",
__func__, dma_addr, offset, size, dir);
if (sync_single(dev, dma_addr, offset + size, dir))
dma_cache_maint(dma_to_virt(dev, dma_addr) + offset, size, dir);
}
EXPORT_SYMBOL(dma_sync_single_range_for_device);
void
dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg, int nents,
enum dma_data_direction dir)
{
int i;
dev_dbg(dev, "%s(sg=%p,nents=%d,dir=%x)\n",
__func__, sg, nents, dir);
BUG_ON(dir == DMA_NONE);
for (i = 0; i < nents; i++, sg++) {
dma_addr_t dma_addr = sg->dma_address;
unsigned int length = sg->length;
sync_single(dev, dma_addr, length, dir);
}
}
void
dma_sync_sg_for_device(struct device *dev, struct scatterlist *sg, int nents,
enum dma_data_direction dir)
{
int i;
dev_dbg(dev, "%s(sg=%p,nents=%d,dir=%x)\n",
__func__, sg, nents, dir);
BUG_ON(dir == DMA_NONE);
for (i = 0; i < nents; i++, sg++) {
dma_addr_t dma_addr = sg->dma_address;
unsigned int length = sg->length;
sync_single(dev, dma_addr, length, dir);
}
}
static int
dmabounce_init_pool(struct dmabounce_pool *pool, struct device *dev, const char *name,
unsigned long size)
static int dmabounce_init_pool(struct dmabounce_pool *pool, struct device *dev,
const char *name, unsigned long size)
{
pool->size = size;
DO_STATS(pool->allocs = 0);
@ -549,9 +440,8 @@ dmabounce_init_pool(struct dmabounce_pool *pool, struct device *dev, const char
return pool->pool ? 0 : -ENOMEM;
}
int
dmabounce_register_dev(struct device *dev, unsigned long small_buffer_size,
unsigned long large_buffer_size)
int dmabounce_register_dev(struct device *dev, unsigned long small_buffer_size,
unsigned long large_buffer_size)
{
struct dmabounce_device_info *device_info;
int ret;
@ -607,9 +497,9 @@ dmabounce_register_dev(struct device *dev, unsigned long small_buffer_size,
kfree(device_info);
return ret;
}
EXPORT_SYMBOL(dmabounce_register_dev);
void
dmabounce_unregister_dev(struct device *dev)
void dmabounce_unregister_dev(struct device *dev)
{
struct dmabounce_device_info *device_info = dev->archdata.dmabounce;
@ -642,15 +532,6 @@ dmabounce_unregister_dev(struct device *dev)
dev_info(dev, "dmabounce: device unregistered\n");
}
EXPORT_SYMBOL(dma_map_single);
EXPORT_SYMBOL(dma_unmap_single);
EXPORT_SYMBOL(dma_map_sg);
EXPORT_SYMBOL(dma_unmap_sg);
EXPORT_SYMBOL(dma_sync_sg_for_cpu);
EXPORT_SYMBOL(dma_sync_sg_for_device);
EXPORT_SYMBOL(dmabounce_register_dev);
EXPORT_SYMBOL(dmabounce_unregister_dev);
MODULE_AUTHOR("Christopher Hoover <ch@hpl.hp.com>, Deepak Saxena <dsaxena@plexity.net>");

2
arch/arm/common/gic.c
View File

@ -27,9 +27,9 @@
#include <linux/list.h>
#include <linux/smp.h>
#include <linux/cpumask.h>
#include <linux/io.h>
#include <asm/irq.h>
#include <asm/io.h>
#include <asm/mach/irq.h>
#include <asm/hardware/gic.h>

14
arch/arm/common/it8152.c
View File

@ -66,14 +66,6 @@ static void it8152_unmask_irq(unsigned int irq)
}
}
static inline void it8152_irq(int irq)
{
struct irq_desc *desc;
desc = irq_desc + irq;
desc_handle_irq(irq, desc);
}
static struct irq_chip it8152_irq_chip = {
.name = "it8152",
.ack = it8152_mask_irq,
@ -128,21 +120,21 @@ void it8152_irq_demux(unsigned int irq, struct irq_desc *desc)
bits_pd &= ((1 << IT8152_PD_IRQ_COUNT) - 1);
while (bits_pd) {
i = __ffs(bits_pd);
it8152_irq(IT8152_PD_IRQ(i));
generic_handle_irq(IT8152_PD_IRQ(i));
bits_pd &= ~(1 << i);
}
bits_lp &= ((1 << IT8152_LP_IRQ_COUNT) - 1);
while (bits_lp) {
i = __ffs(bits_lp);
it8152_irq(IT8152_LP_IRQ(i));
generic_handle_irq(IT8152_LP_IRQ(i));
bits_lp &= ~(1 << i);
}
bits_ld &= ((1 << IT8152_LD_IRQ_COUNT) - 1);
while (bits_ld) {
i = __ffs(bits_ld);
it8152_irq(IT8152_LD_IRQ(i));
generic_handle_irq(IT8152_LD_IRQ(i));
bits_ld &= ~(1 << i);
}
}

28
arch/arm/common/locomo.c
View File

@ -24,9 +24,9 @@
#include <linux/platform_device.h>
#include <linux/slab.h>
#include <linux/spinlock.h>
#include <linux/io.h>
#include <mach/hardware.h>
#include <asm/io.h>
#include <asm/irq.h>
#include <asm/mach/irq.h>
@ -169,7 +169,6 @@ static struct locomo_dev_info locomo_devices[] = {
static void locomo_handler(unsigned int irq, struct irq_desc *desc)
{
int req, i;
struct irq_desc *d;
void __iomem *mapbase = get_irq_chip_data(irq);
/* Acknowledge the parent IRQ */
@ -181,10 +180,9 @@ static void locomo_handler(unsigned int irq, struct irq_desc *desc)
if (req) {
/* generate the next interrupt(s) */
irq = LOCOMO_IRQ_START;
d = irq_desc + irq;
for (i = 0; i <= 3; i++, d++, irq++) {
for (i = 0; i <= 3; i++, irq++) {
if (req & (0x0100 << i)) {
desc_handle_irq(irq, d);
generic_handle_irq(irq);
}
}
@ -222,12 +220,10 @@ static struct irq_chip locomo_chip = {
static void locomo_key_handler(unsigned int irq, struct irq_desc *desc)
{
struct irq_desc *d;
void __iomem *mapbase = get_irq_chip_data(irq);
if (locomo_readl(mapbase + LOCOMO_KEYBOARD + LOCOMO_KIC) & 0x0001) {
d = irq_desc + LOCOMO_IRQ_KEY_START;
desc_handle_irq(LOCOMO_IRQ_KEY_START, d);
generic_handle_irq(LOCOMO_IRQ_KEY_START);
}
}
@ -268,7 +264,6 @@ static struct irq_chip locomo_key_chip = {
static void locomo_gpio_handler(unsigned int irq, struct irq_desc *desc)
{
int req, i;
struct irq_desc *d;
void __iomem *mapbase = get_irq_chip_data(irq);
req = locomo_readl(mapbase + LOCOMO_GIR) &
@ -277,10 +272,9 @@ static void locomo_gpio_handler(unsigned int irq, struct irq_desc *desc)
if (req) {
irq = LOCOMO_IRQ_GPIO_START;
d = irq_desc + LOCOMO_IRQ_GPIO_START;
for (i = 0; i <= 15; i++, irq++, d++) {
for (i = 0; i <= 15; i++, irq++) {
if (req & (0x0001 << i)) {
desc_handle_irq(irq, d);
generic_handle_irq(irq);
}
}
}
@ -361,12 +355,10 @@ static struct irq_chip locomo_gpio_chip = {
static void locomo_lt_handler(unsigned int irq, struct irq_desc *desc)
{
struct irq_desc *d;
void __iomem *mapbase = get_irq_chip_data(irq);
if (locomo_readl(mapbase + LOCOMO_LTINT) & 0x0001) {
d = irq_desc + LOCOMO_IRQ_LT_START;
desc_handle_irq(LOCOMO_IRQ_LT_START, d);
generic_handle_irq(LOCOMO_IRQ_LT_START);
}
}
@ -407,17 +399,15 @@ static struct irq_chip locomo_lt_chip = {
static void locomo_spi_handler(unsigned int irq, struct irq_desc *desc)
{
int req, i;
struct irq_desc *d;
void __iomem *mapbase = get_irq_chip_data(irq);
req = locomo_readl(mapbase + LOCOMO_SPI + LOCOMO_SPIIR) & 0x000F;
if (req) {
irq = LOCOMO_IRQ_SPI_START;
d = irq_desc + irq;
for (i = 0; i <= 3; i++, irq++, d++) {
for (i = 0; i <= 3; i++, irq++) {
if (req & (0x0001 << i)) {
desc_handle_irq(irq, d);
generic_handle_irq(irq);
}
}
}

2
arch/arm/common/sa1111.c
View File

@ -25,10 +25,10 @@
#include <linux/spinlock.h>
#include <linux/dma-mapping.h>
#include <linux/clk.h>
#include <linux/io.h>
#include <mach/hardware.h>
#include <asm/mach-types.h>
#include <asm/io.h>
#include <asm/irq.h>
#include <asm/mach/irq.h>
#include <asm/sizes.h>

2
arch/arm/common/scoop.c
View File

@ -15,7 +15,7 @@
#include <linux/string.h>
#include <linux/slab.h>
#include <linux/platform_device.h>
#include <asm/io.h>
#include <linux/io.h>
#include <asm/gpio.h>
#include <asm/hardware/scoop.h>

2
arch/arm/common/sharpsl_param.c
View File

@ -12,6 +12,7 @@
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/string.h>
#include <asm/mach/sharpsl_param.h>
@ -36,6 +37,7 @@
#define PHAD_MAGIC MAGIC_CHG('P','H','A','D')
struct sharpsl_param_info sharpsl_param;
EXPORT_SYMBOL(sharpsl_param);
void sharpsl_save_param(void)
{

2
arch/arm/common/time-acorn.c
View File

@ -17,9 +17,9 @@
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/irq.h>
#include <linux/io.h>
#include <mach/hardware.h>
#include <asm/io.h>
#include <asm/hardware/ioc.h>
#include <asm/mach/time.h>

2
arch/arm/common/uengine.c
View File

@ -16,9 +16,9 @@
#include <linux/slab.h>
#include <linux/module.h>
#include <linux/string.h>
#include <linux/io.h>
#include <mach/hardware.h>
#include <asm/hardware/uengine.h>
#include <asm/io.h>
#if defined(CONFIG_ARCH_IXP2000)
#define IXP_UENGINE_CSR_VIRT_BASE IXP2000_UENGINE_CSR_VIRT_BASE

2
arch/arm/common/via82c505.c
View File

@ -4,8 +4,8 @@
#include <linux/mm.h>
#include <linux/init.h>
#include <linux/ioport.h>
#include <linux/io.h>
#include <asm/io.h>
#include <asm/system.h>
#include <asm/mach/pci.h>

2
arch/arm/common/vic.c
View File

@ -20,8 +20,8 @@
*/
#include <linux/init.h>
#include <linux/list.h>
#include <linux/io.h>
#include <asm/io.h>
#include <asm/mach/irq.h>
#include <asm/hardware/vic.h>

1259
arch/arm/configs/afeb9260_defconfig Normal file
View File

File diff suppressed because it is too large Load Diff

1
arch/arm/configs/at91sam9rlek_defconfig
View File

@ -496,6 +496,7 @@ CONFIG_INPUT_TOUCHSCREEN=y
# CONFIG_TOUCHSCREEN_PENMOUNT is not set
# CONFIG_TOUCHSCREEN_TOUCHRIGHT is not set
# CONFIG_TOUCHSCREEN_TOUCHWIN is not set
CONFIG_TOUCHSCREEN_ATMEL_TSADCC=y
# CONFIG_TOUCHSCREEN_UCB1400 is not set
# CONFIG_TOUCHSCREEN_USB_COMPOSITE is not set
# CONFIG_INPUT_MISC is not set

1466
arch/arm/configs/cm_x300_defconfig Normal file
View File

File diff suppressed because it is too large Load Diff

1121
arch/arm/configs/jornada720_defconfig
View File

File diff suppressed because it is too large Load Diff

3
arch/arm/configs/orion5x_defconfig
View File

@ -176,14 +176,17 @@ CONFIG_MACH_KUROBOX_PRO=y
CONFIG_MACH_DNS323=y
CONFIG_MACH_TS209=y
CONFIG_MACH_LINKSTATION_PRO=y
CONFIG_MACH_LINKSTATION_MINI=y
CONFIG_MACH_TS409=y
CONFIG_MACH_WRT350N_V2=y
CONFIG_MACH_TS78XX=y
CONFIG_MACH_MV2120=y
CONFIG_MACH_EDMINI_V2=y
CONFIG_MACH_MSS2=y
CONFIG_MACH_WNR854T=y
CONFIG_MACH_RD88F5181L_GE=y
CONFIG_MACH_RD88F5181L_FXO=y
CONFIG_MACH_RD88F6183AP_GE=y
#
# Boot options

951
arch/arm/configs/palmz72_defconfig Normal file
View File

@ -0,0 +1,951 @@
#
# Automatically generated make config: don't edit
# Linux kernel version: 2.6.27-rc4
# Sun Aug 24 02:29:27 2008
#
CONFIG_ARM=y
CONFIG_HAVE_PWM=y
CONFIG_SYS_SUPPORTS_APM_EMULATION=y
CONFIG_GENERIC_GPIO=y
CONFIG_GENERIC_TIME=y
CONFIG_GENERIC_CLOCKEVENTS=y
CONFIG_MMU=y
# CONFIG_NO_IOPORT is not set
CONFIG_GENERIC_HARDIRQS=y
CONFIG_STACKTRACE_SUPPORT=y
CONFIG_HAVE_LATENCYTOP_SUPPORT=y
CONFIG_LOCKDEP_SUPPORT=y
CONFIG_TRACE_IRQFLAGS_SUPPORT=y
CONFIG_HARDIRQS_SW_RESEND=y
CONFIG_GENERIC_IRQ_PROBE=y
CONFIG_RWSEM_GENERIC_SPINLOCK=y
# CONFIG_ARCH_HAS_ILOG2_U32 is not set
# CONFIG_ARCH_HAS_ILOG2_U64 is not set
CONFIG_GENERIC_HWEIGHT=y
CONFIG_GENERIC_CALIBRATE_DELAY=y
CONFIG_ARCH_SUPPORTS_AOUT=y
CONFIG_ZONE_DMA=y
CONFIG_ARCH_MTD_XIP=y
CONFIG_GENERIC_HARDIRQS_NO__DO_IRQ=y
CONFIG_VECTORS_BASE=0xffff0000
CONFIG_DEFCONFIG_LIST="/lib/modules/$UNAME_RELEASE/.config"
#
# General setup
#
CONFIG_EXPERIMENTAL=y
CONFIG_BROKEN_ON_SMP=y
CONFIG_LOCK_KERNEL=y
CONFIG_INIT_ENV_ARG_LIMIT=32
CONFIG_LOCALVERSION=""
# CONFIG_LOCALVERSION_AUTO is not set
CONFIG_SWAP=y
CONFIG_SYSVIPC=y
CONFIG_SYSVIPC_SYSCTL=y
# CONFIG_POSIX_MQUEUE is not set
# CONFIG_BSD_PROCESS_ACCT is not set
# CONFIG_TASKSTATS is not set
# CONFIG_AUDIT is not set
# CONFIG_IKCONFIG is not set
CONFIG_LOG_BUF_SHIFT=14
# CONFIG_CGROUPS is not set
# CONFIG_GROUP_SCHED is not set
CONFIG_SYSFS_DEPRECATED=y
CONFIG_SYSFS_DEPRECATED_V2=y
# CONFIG_RELAY is not set
CONFIG_NAMESPACES=y
# CONFIG_UTS_NS is not set
# CONFIG_IPC_NS is not set
# CONFIG_USER_NS is not set
# CONFIG_PID_NS is not set
CONFIG_BLK_DEV_INITRD=y
CONFIG_INITRAMFS_SOURCE=""
CONFIG_CC_OPTIMIZE_FOR_SIZE=y
CONFIG_SYSCTL=y
# CONFIG_EMBEDDED is not set
CONFIG_UID16=y
CONFIG_SYSCTL_SYSCALL=y
CONFIG_KALLSYMS=y
# CONFIG_KALLSYMS_EXTRA_PASS is not set
CONFIG_HOTPLUG=y
CONFIG_PRINTK=y
CONFIG_BUG=y
CONFIG_ELF_CORE=y
CONFIG_COMPAT_BRK=y
CONFIG_BASE_FULL=y
CONFIG_FUTEX=y
CONFIG_ANON_INODES=y
CONFIG_EPOLL=y
CONFIG_SIGNALFD=y
CONFIG_TIMERFD=y
CONFIG_EVENTFD=y
CONFIG_SHMEM=y
CONFIG_VM_EVENT_COUNTERS=y
CONFIG_SLAB=y
# CONFIG_SLUB is not set
# CONFIG_SLOB is not set
# CONFIG_PROFILING is not set
# CONFIG_MARKERS is not set
CONFIG_HAVE_OPROFILE=y
# CONFIG_KPROBES is not set
# CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS is not set
# CONFIG_HAVE_IOREMAP_PROT is not set
CONFIG_HAVE_KPROBES=y
CONFIG_HAVE_KRETPROBES=y
# CONFIG_HAVE_ARCH_TRACEHOOK is not set
# CONFIG_HAVE_DMA_ATTRS is not set
# CONFIG_USE_GENERIC_SMP_HELPERS is not set
CONFIG_HAVE_CLK=y
CONFIG_PROC_PAGE_MONITOR=y
CONFIG_HAVE_GENERIC_DMA_COHERENT=y
CONFIG_SLABINFO=y
CONFIG_RT_MUTEXES=y
# CONFIG_TINY_SHMEM is not set
CONFIG_BASE_SMALL=0
CONFIG_MODULES=y
# CONFIG_MODULE_FORCE_LOAD is not set
CONFIG_MODULE_UNLOAD=y
# CONFIG_MODULE_FORCE_UNLOAD is not set
# CONFIG_MODVERSIONS is not set
# CONFIG_MODULE_SRCVERSION_ALL is not set
CONFIG_KMOD=y
CONFIG_BLOCK=y
# CONFIG_LBD is not set
# CONFIG_BLK_DEV_IO_TRACE is not set
# CONFIG_LSF is not set
# CONFIG_BLK_DEV_BSG is not set
# CONFIG_BLK_DEV_INTEGRITY is not set
#
# IO Schedulers
#
CONFIG_IOSCHED_NOOP=y
CONFIG_IOSCHED_AS=y
# CONFIG_IOSCHED_DEADLINE is not set
# CONFIG_IOSCHED_CFQ is not set
CONFIG_DEFAULT_AS=y
# CONFIG_DEFAULT_DEADLINE is not set
# CONFIG_DEFAULT_CFQ is not set
# CONFIG_DEFAULT_NOOP is not set
CONFIG_DEFAULT_IOSCHED="anticipatory"
CONFIG_CLASSIC_RCU=y
#
# System Type
#
# CONFIG_ARCH_AAEC2000 is not set
# CONFIG_ARCH_INTEGRATOR is not set
# CONFIG_ARCH_REALVIEW is not set
# CONFIG_ARCH_VERSATILE is not set
# CONFIG_ARCH_AT91 is not set
# CONFIG_ARCH_CLPS7500 is not set
# CONFIG_ARCH_CLPS711X is not set
# CONFIG_ARCH_EBSA110 is not set
# CONFIG_ARCH_EP93XX is not set
# CONFIG_ARCH_FOOTBRIDGE is not set
# CONFIG_ARCH_NETX is not set
# CONFIG_ARCH_H720X is not set
# CONFIG_ARCH_IMX is not set
# CONFIG_ARCH_IOP13XX is not set
# CONFIG_ARCH_IOP32X is not set
# CONFIG_ARCH_IOP33X is not set
# CONFIG_ARCH_IXP23XX is not set
# CONFIG_ARCH_IXP2000 is not set
# CONFIG_ARCH_IXP4XX is not set
# CONFIG_ARCH_L7200 is not set
# CONFIG_ARCH_KIRKWOOD is not set
# CONFIG_ARCH_KS8695 is not set
# CONFIG_ARCH_NS9XXX is not set
# CONFIG_ARCH_LOKI is not set
# CONFIG_ARCH_MV78XX0 is not set
# CONFIG_ARCH_MXC is not set
# CONFIG_ARCH_ORION5X is not set
# CONFIG_ARCH_PNX4008 is not set
CONFIG_ARCH_PXA=y
# CONFIG_ARCH_RPC is not set
# CONFIG_ARCH_SA1100 is not set
# CONFIG_ARCH_S3C2410 is not set
# CONFIG_ARCH_SHARK is not set
# CONFIG_ARCH_LH7A40X is not set
# CONFIG_ARCH_DAVINCI is not set
# CONFIG_ARCH_OMAP is not set
# CONFIG_ARCH_MSM7X00A is not set
#
# Intel PXA2xx/PXA3xx Implementations
#
# CONFIG_ARCH_GUMSTIX is not set
# CONFIG_ARCH_LUBBOCK is not set
# CONFIG_MACH_LOGICPD_PXA270 is not set
# CONFIG_MACH_MAINSTONE is not set
# CONFIG_ARCH_PXA_IDP is not set
# CONFIG_PXA_SHARPSL is not set
# CONFIG_ARCH_PXA_ESERIES is not set
# CONFIG_MACH_TRIZEPS4 is not set
# CONFIG_MACH_EM_X270 is not set
# CONFIG_MACH_COLIBRI is not set
# CONFIG_MACH_ZYLONITE is not set
# CONFIG_MACH_LITTLETON is not set
# CONFIG_MACH_TAVOREVB is not set
# CONFIG_MACH_SAAR is not set
# CONFIG_MACH_ARMCORE is not set
# CONFIG_MACH_MAGICIAN is not set
# CONFIG_MACH_PCM027 is not set
CONFIG_ARCH_PXA_PALM=y
# CONFIG_MACH_PALMTX is not set
CONFIG_MACH_PALMZ72=y
# CONFIG_PXA_EZX is not set
CONFIG_PXA27x=y
CONFIG_PXA_PWM=y
#
# Boot options
#
#
# Power management
#
#
# Processor Type
#
CONFIG_CPU_32=y
CONFIG_CPU_XSCALE=y
CONFIG_CPU_32v5=y
CONFIG_CPU_ABRT_EV5T=y
CONFIG_CPU_PABRT_NOIFAR=y
CONFIG_CPU_CACHE_VIVT=y
CONFIG_CPU_TLB_V4WBI=y
CONFIG_CPU_CP15=y
CONFIG_CPU_CP15_MMU=y
#
# Processor Features
#
CONFIG_ARM_THUMB=y
# CONFIG_CPU_DCACHE_DISABLE is not set
# CONFIG_OUTER_CACHE is not set
CONFIG_IWMMXT=y
CONFIG_XSCALE_PMU=y
#
# Bus support
#
# CONFIG_PCI_SYSCALL is not set
# CONFIG_ARCH_SUPPORTS_MSI is not set
# CONFIG_PCCARD is not set
#
# Kernel Features
#
CONFIG_TICK_ONESHOT=y
# CONFIG_NO_HZ is not set
# CONFIG_HIGH_RES_TIMERS is not set
CONFIG_GENERIC_CLOCKEVENTS_BUILD=y
CONFIG_PREEMPT=y
CONFIG_HZ=100
CONFIG_AEABI=y
CONFIG_OABI_COMPAT=y
# CONFIG_ARCH_DISCONTIGMEM_ENABLE is not set
CONFIG_SELECT_MEMORY_MODEL=y
CONFIG_FLATMEM_MANUAL=y
# CONFIG_DISCONTIGMEM_MANUAL is not set
# CONFIG_SPARSEMEM_MANUAL is not set
CONFIG_FLATMEM=y
CONFIG_FLAT_NODE_MEM_MAP=y
# CONFIG_SPARSEMEM_STATIC is not set
# CONFIG_SPARSEMEM_VMEMMAP_ENABLE is not set
CONFIG_PAGEFLAGS_EXTENDED=y
CONFIG_SPLIT_PTLOCK_CPUS=4096
# CONFIG_RESOURCES_64BIT is not set
CONFIG_ZONE_DMA_FLAG=1
CONFIG_BOUNCE=y
CONFIG_VIRT_TO_BUS=y
CONFIG_ALIGNMENT_TRAP=y
#
# Boot options
#
CONFIG_ZBOOT_ROM_TEXT=0x0
CONFIG_ZBOOT_ROM_BSS=0x0
CONFIG_CMDLINE="mem=32M console=tty root=/dev/mmcblk0"
# CONFIG_XIP_KERNEL is not set
# CONFIG_KEXEC is not set
#
# CPU Frequency scaling
#
# CONFIG_CPU_FREQ is not set
#
# Floating point emulation
#
#
# At least one emulation must be selected
#
CONFIG_FPE_NWFPE=y
# CONFIG_FPE_NWFPE_XP is not set
# CONFIG_FPE_FASTFPE is not set
#
# Userspace binary formats
#
CONFIG_BINFMT_ELF=y
# CONFIG_BINFMT_AOUT is not set
# CONFIG_BINFMT_MISC is not set
#
# Power management options
#
CONFIG_PM=y
# CONFIG_PM_DEBUG is not set
CONFIG_PM_SLEEP=y
CONFIG_SUSPEND=y
CONFIG_SUSPEND_FREEZER=y
CONFIG_APM_EMULATION=y
CONFIG_ARCH_SUSPEND_POSSIBLE=y
CONFIG_NET=y
#
# Networking options
#
CONFIG_PACKET=y
# CONFIG_PACKET_MMAP is not set
CONFIG_UNIX=y
# CONFIG_NET_KEY is not set
CONFIG_INET=y
# CONFIG_IP_MULTICAST is not set
# CONFIG_IP_ADVANCED_ROUTER is not set
CONFIG_IP_FIB_HASH=y
CONFIG_IP_PNP=y
# CONFIG_IP_PNP_DHCP is not set
CONFIG_IP_PNP_BOOTP=y
# CONFIG_IP_PNP_RARP is not set
# CONFIG_NET_IPIP is not set
# CONFIG_NET_IPGRE is not set
# CONFIG_ARPD is not set
# CONFIG_SYN_COOKIES is not set
# CONFIG_INET_AH is not set
# CONFIG_INET_ESP is not set
# CONFIG_INET_IPCOMP is not set
# CONFIG_INET_XFRM_TUNNEL is not set
# CONFIG_INET_TUNNEL is not set
# CONFIG_INET_XFRM_MODE_TRANSPORT is not set
# CONFIG_INET_XFRM_MODE_TUNNEL is not set
# CONFIG_INET_XFRM_MODE_BEET is not set
# CONFIG_INET_LRO is not set
CONFIG_INET_DIAG=y
CONFIG_INET_TCP_DIAG=y
# CONFIG_TCP_CONG_ADVANCED is not set
CONFIG_TCP_CONG_CUBIC=y
CONFIG_DEFAULT_TCP_CONG="cubic"
# CONFIG_TCP_MD5SIG is not set
# CONFIG_IPV6 is not set
# CONFIG_NETWORK_SECMARK is not set
# CONFIG_NETFILTER is not set
# CONFIG_IP_DCCP is not set
# CONFIG_IP_SCTP is not set
# CONFIG_TIPC is not set
# CONFIG_ATM is not set
# CONFIG_BRIDGE is not set
# CONFIG_VLAN_8021Q is not set
# CONFIG_DECNET is not set
# CONFIG_LLC2 is not set
# CONFIG_IPX is not set
# CONFIG_ATALK is not set
# CONFIG_X25 is not set
# CONFIG_LAPB is not set
# CONFIG_ECONET is not set
# CONFIG_WAN_ROUTER is not set
# CONFIG_NET_SCHED is not set
#
# Network testing
#
# CONFIG_NET_PKTGEN is not set
# CONFIG_HAMRADIO is not set
# CONFIG_CAN is not set
# CONFIG_IRDA is not set
# CONFIG_BT is not set
# CONFIG_AF_RXRPC is not set
#
# Wireless
#
# CONFIG_CFG80211 is not set
# CONFIG_WIRELESS_EXT is not set
# CONFIG_MAC80211 is not set
# CONFIG_IEEE80211 is not set
# CONFIG_RFKILL is not set
# CONFIG_NET_9P is not set
#
# Device Drivers
#
#
# Generic Driver Options
#
CONFIG_UEVENT_HELPER_PATH="/sbin/hotplug"
CONFIG_STANDALONE=y
CONFIG_PREVENT_FIRMWARE_BUILD=y
CONFIG_FW_LOADER=y
CONFIG_FIRMWARE_IN_KERNEL=y
CONFIG_EXTRA_FIRMWARE=""
# CONFIG_SYS_HYPERVISOR is not set
# CONFIG_CONNECTOR is not set
# CONFIG_MTD is not set
# CONFIG_PARPORT is not set
CONFIG_BLK_DEV=y
# CONFIG_BLK_DEV_COW_COMMON is not set
CONFIG_BLK_DEV_LOOP=y
# CONFIG_BLK_DEV_CRYPTOLOOP is not set
# CONFIG_BLK_DEV_NBD is not set
# CONFIG_BLK_DEV_RAM is not set
# CONFIG_CDROM_PKTCDVD is not set
# CONFIG_ATA_OVER_ETH is not set
# CONFIG_MISC_DEVICES is not set
CONFIG_HAVE_IDE=y
# CONFIG_IDE is not set
#
# SCSI device support
#
# CONFIG_RAID_ATTRS is not set
# CONFIG_SCSI is not set
# CONFIG_SCSI_DMA is not set
# CONFIG_SCSI_NETLINK is not set
# CONFIG_ATA is not set
# CONFIG_MD is not set
# CONFIG_NETDEVICES is not set
# CONFIG_ISDN is not set
#
# Input device support
#
CONFIG_INPUT=y
# CONFIG_INPUT_FF_MEMLESS is not set
# CONFIG_INPUT_POLLDEV is not set
#
# Userland interfaces
#
CONFIG_INPUT_MOUSEDEV=y
# CONFIG_INPUT_MOUSEDEV_PSAUX is not set
CONFIG_INPUT_MOUSEDEV_SCREEN_X=1024
CONFIG_INPUT_MOUSEDEV_SCREEN_Y=768
# CONFIG_INPUT_JOYDEV is not set
CONFIG_INPUT_EVDEV=y
# CONFIG_INPUT_EVBUG is not set
#
# Input Device Drivers
#
CONFIG_INPUT_KEYBOARD=y
# CONFIG_KEYBOARD_ATKBD is not set
# CONFIG_KEYBOARD_SUNKBD is not set
# CONFIG_KEYBOARD_LKKBD is not set
# CONFIG_KEYBOARD_XTKBD is not set
# CONFIG_KEYBOARD_NEWTON is not set
# CONFIG_KEYBOARD_STOWAWAY is not set
CONFIG_KEYBOARD_PXA27x=y
# CONFIG_KEYBOARD_GPIO is not set
# CONFIG_KEYBOARD_MATRIX is not set
# CONFIG_INPUT_MOUSE is not set
# CONFIG_INPUT_JOYSTICK is not set
# CONFIG_INPUT_TABLET is not set
# CONFIG_INPUT_TOUCHSCREEN is not set
# CONFIG_INPUT_MISC is not set
#
# Hardware I/O ports
#
# CONFIG_SERIO is not set
# CONFIG_GAMEPORT is not set
#
# Character devices
#
CONFIG_VT=y
CONFIG_CONSOLE_TRANSLATIONS=y
CONFIG_VT_CONSOLE=y
CONFIG_HW_CONSOLE=y
# CONFIG_VT_HW_CONSOLE_BINDING is not set
CONFIG_DEVKMEM=y
# CONFIG_SERIAL_NONSTANDARD is not set
#
# Serial drivers
#
# CONFIG_SERIAL_8250 is not set
#
# Non-8250 serial port support
#
# CONFIG_SERIAL_PXA is not set
CONFIG_UNIX98_PTYS=y
CONFIG_LEGACY_PTYS=y
CONFIG_LEGACY_PTY_COUNT=256
# CONFIG_IPMI_HANDLER is not set
# CONFIG_HW_RANDOM is not set
# CONFIG_NVRAM is not set
# CONFIG_R3964 is not set
# CONFIG_RAW_DRIVER is not set
# CONFIG_TCG_TPM is not set
CONFIG_I2C=y
CONFIG_I2C_BOARDINFO=y
# CONFIG_I2C_CHARDEV is not set
CONFIG_I2C_HELPER_AUTO=y
#
# I2C Hardware Bus support
#
#
# I2C system bus drivers (mostly embedded / system-on-chip)
#
# CONFIG_I2C_GPIO is not set
# CONFIG_I2C_OCORES is not set
CONFIG_I2C_PXA=y
# CONFIG_I2C_PXA_SLAVE is not set
# CONFIG_I2C_SIMTEC is not set
#
# External I2C/SMBus adapter drivers
#
# CONFIG_I2C_PARPORT_LIGHT is not set
# CONFIG_I2C_TAOS_EVM is not set
#
# Other I2C/SMBus bus drivers
#
# CONFIG_I2C_PCA_PLATFORM is not set
# CONFIG_I2C_STUB is not set
#
# Miscellaneous I2C Chip support
#
# CONFIG_DS1682 is not set
# CONFIG_AT24 is not set
# CONFIG_SENSORS_EEPROM is not set
# CONFIG_SENSORS_PCF8574 is not set
# CONFIG_PCF8575 is not set
# CONFIG_SENSORS_PCA9539 is not set
# CONFIG_SENSORS_PCF8591 is not set
# CONFIG_TPS65010 is not set
# CONFIG_SENSORS_MAX6875 is not set
# CONFIG_SENSORS_TSL2550 is not set
# CONFIG_I2C_DEBUG_CORE is not set
# CONFIG_I2C_DEBUG_ALGO is not set
# CONFIG_I2C_DEBUG_BUS is not set
# CONFIG_I2C_DEBUG_CHIP is not set
CONFIG_SPI=y
CONFIG_SPI_MASTER=y
#
# SPI Master Controller Drivers
#
# CONFIG_SPI_BITBANG is not set
# CONFIG_SPI_PXA2XX is not set
#
# SPI Protocol Masters
#
# CONFIG_SPI_AT25 is not set
CONFIG_SPI_SPIDEV=y
# CONFIG_SPI_TLE62X0 is not set
CONFIG_ARCH_REQUIRE_GPIOLIB=y
CONFIG_GPIOLIB=y
CONFIG_GPIO_SYSFS=y
#
# I2C GPIO expanders:
#
# CONFIG_GPIO_MAX732X is not set
# CONFIG_GPIO_PCA953X is not set
# CONFIG_GPIO_PCF857X is not set
#
# PCI GPIO expanders:
#
#
# SPI GPIO expanders:
#
# CONFIG_GPIO_MAX7301 is not set
# CONFIG_GPIO_MCP23S08 is not set
# CONFIG_W1 is not set
CONFIG_POWER_SUPPLY=y
# CONFIG_POWER_SUPPLY_DEBUG is not set
CONFIG_PDA_POWER=y
# CONFIG_APM_POWER is not set
# CONFIG_BATTERY_DS2760 is not set
# CONFIG_HWMON is not set
# CONFIG_WATCHDOG is not set
#
# Sonics Silicon Backplane
#
CONFIG_SSB_POSSIBLE=y
# CONFIG_SSB is not set
#
# Multifunction device drivers
#
# CONFIG_MFD_CORE is not set
# CONFIG_MFD_SM501 is not set
# CONFIG_HTC_EGPIO is not set
# CONFIG_HTC_PASIC3 is not set
# CONFIG_MFD_TMIO is not set
# CONFIG_MFD_T7L66XB is not set
# CONFIG_MFD_TC6387XB is not set
# CONFIG_MFD_TC6393XB is not set
#
# Multimedia devices
#
#
# Multimedia core support
#
# CONFIG_VIDEO_DEV is not set
# CONFIG_DVB_CORE is not set
# CONFIG_VIDEO_MEDIA is not set
#
# Multimedia drivers
#
# CONFIG_DAB is not set
#
# Graphics support
#
# CONFIG_VGASTATE is not set
# CONFIG_VIDEO_OUTPUT_CONTROL is not set
CONFIG_FB=y
# CONFIG_FIRMWARE_EDID is not set
# CONFIG_FB_DDC is not set
CONFIG_FB_CFB_FILLRECT=y
CONFIG_FB_CFB_COPYAREA=y
CONFIG_FB_CFB_IMAGEBLIT=y
# CONFIG_FB_CFB_REV_PIXELS_IN_BYTE is not set
# CONFIG_FB_SYS_FILLRECT is not set
# CONFIG_FB_SYS_COPYAREA is not set
# CONFIG_FB_SYS_IMAGEBLIT is not set
# CONFIG_FB_FOREIGN_ENDIAN is not set
# CONFIG_FB_SYS_FOPS is not set
# CONFIG_FB_SVGALIB is not set
# CONFIG_FB_MACMODES is not set
# CONFIG_FB_BACKLIGHT is not set
# CONFIG_FB_MODE_HELPERS is not set
# CONFIG_FB_TILEBLITTING is not set
#
# Frame buffer hardware drivers
#
# CONFIG_FB_S1D13XXX is not set
CONFIG_FB_PXA=y
# CONFIG_FB_PXA_SMARTPANEL is not set
# CONFIG_FB_PXA_PARAMETERS is not set
# CONFIG_FB_MBX is not set
# CONFIG_FB_W100 is not set
# CONFIG_FB_AM200EPD is not set
# CONFIG_FB_VIRTUAL is not set
CONFIG_BACKLIGHT_LCD_SUPPORT=y
# CONFIG_LCD_CLASS_DEVICE is not set
CONFIG_BACKLIGHT_CLASS_DEVICE=y
# CONFIG_BACKLIGHT_CORGI is not set
CONFIG_BACKLIGHT_PWM=y
#
# Display device support
#
CONFIG_DISPLAY_SUPPORT=y
#
# Display hardware drivers
#
#
# Console display driver support
#
# CONFIG_VGA_CONSOLE is not set
CONFIG_DUMMY_CONSOLE=y
CONFIG_FRAMEBUFFER_CONSOLE=y
# CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY is not set
# CONFIG_FRAMEBUFFER_CONSOLE_ROTATION is not set
CONFIG_FONTS=y
CONFIG_FONT_8x8=y
# CONFIG_FONT_8x16 is not set
# CONFIG_FONT_6x11 is not set
# CONFIG_FONT_7x14 is not set
# CONFIG_FONT_PEARL_8x8 is not set
# CONFIG_FONT_ACORN_8x8 is not set
# CONFIG_FONT_MINI_4x6 is not set
# CONFIG_FONT_SUN8x16 is not set
# CONFIG_FONT_SUN12x22 is not set
# CONFIG_FONT_10x18 is not set
# CONFIG_LOGO is not set
# CONFIG_SOUND is not set
# CONFIG_HID_SUPPORT is not set
# CONFIG_USB_SUPPORT is not set
CONFIG_MMC=y
CONFIG_MMC_DEBUG=y
# CONFIG_MMC_UNSAFE_RESUME is not set
#
# MMC/SD Card Drivers
#
CONFIG_MMC_BLOCK=y
CONFIG_MMC_BLOCK_BOUNCE=y
# CONFIG_SDIO_UART is not set
# CONFIG_MMC_TEST is not set
#
# MMC/SD Host Controller Drivers
#
CONFIG_MMC_PXA=y
# CONFIG_MMC_SDHCI is not set
# CONFIG_MMC_SPI is not set
# CONFIG_NEW_LEDS is not set
CONFIG_RTC_LIB=y
CONFIG_RTC_CLASS=y
CONFIG_RTC_HCTOSYS=y
CONFIG_RTC_HCTOSYS_DEVICE="rtc0"
# CONFIG_RTC_DEBUG is not set
#
# RTC interfaces
#
CONFIG_RTC_INTF_SYSFS=y
CONFIG_RTC_INTF_PROC=y
CONFIG_RTC_INTF_DEV=y
# CONFIG_RTC_INTF_DEV_UIE_EMUL is not set
# CONFIG_RTC_DRV_TEST is not set
#
# I2C RTC drivers
#
# CONFIG_RTC_DRV_DS1307 is not set
# CONFIG_RTC_DRV_DS1374 is not set
# CONFIG_RTC_DRV_DS1672 is not set
# CONFIG_RTC_DRV_MAX6900 is not set
# CONFIG_RTC_DRV_RS5C372 is not set
# CONFIG_RTC_DRV_ISL1208 is not set
# CONFIG_RTC_DRV_X1205 is not set
# CONFIG_RTC_DRV_PCF8563 is not set
# CONFIG_RTC_DRV_PCF8583 is not set
# CONFIG_RTC_DRV_M41T80 is not set
# CONFIG_RTC_DRV_S35390A is not set
# CONFIG_RTC_DRV_FM3130 is not set
#
# SPI RTC drivers
#
# CONFIG_RTC_DRV_M41T94 is not set
# CONFIG_RTC_DRV_DS1305 is not set
# CONFIG_RTC_DRV_MAX6902 is not set
# CONFIG_RTC_DRV_R9701 is not set
# CONFIG_RTC_DRV_RS5C348 is not set
#
# Platform RTC drivers
#
# CONFIG_RTC_DRV_CMOS is not set
# CONFIG_RTC_DRV_DS1511 is not set
# CONFIG_RTC_DRV_DS1553 is not set
# CONFIG_RTC_DRV_DS1742 is not set
# CONFIG_RTC_DRV_STK17TA8 is not set
# CONFIG_RTC_DRV_M48T86 is not set
# CONFIG_RTC_DRV_M48T59 is not set
# CONFIG_RTC_DRV_V3020 is not set
#
# on-CPU RTC drivers
#
CONFIG_RTC_DRV_SA1100=y
# CONFIG_DMADEVICES is not set
#
# Voltage and Current regulators
#
# CONFIG_REGULATOR is not set
# CONFIG_REGULATOR_FIXED_VOLTAGE is not set
# CONFIG_REGULATOR_VIRTUAL_CONSUMER is not set
# CONFIG_REGULATOR_BQ24022 is not set
# CONFIG_UIO is not set
#
# File systems
#
CONFIG_EXT2_FS=y
# CONFIG_EXT2_FS_XATTR is not set
# CONFIG_EXT2_FS_XIP is not set
CONFIG_EXT3_FS=y
CONFIG_EXT3_FS_XATTR=y
# CONFIG_EXT3_FS_POSIX_ACL is not set
# CONFIG_EXT3_FS_SECURITY is not set
# CONFIG_EXT4DEV_FS is not set
CONFIG_JBD=y
CONFIG_FS_MBCACHE=y
# CONFIG_REISERFS_FS is not set
# CONFIG_JFS_FS is not set
# CONFIG_FS_POSIX_ACL is not set
# CONFIG_XFS_FS is not set
# CONFIG_OCFS2_FS is not set
# CONFIG_DNOTIFY is not set
# CONFIG_INOTIFY is not set
# CONFIG_QUOTA is not set
# CONFIG_AUTOFS_FS is not set
# CONFIG_AUTOFS4_FS is not set
# CONFIG_FUSE_FS is not set
#
# CD-ROM/DVD Filesystems
#
# CONFIG_ISO9660_FS is not set
# CONFIG_UDF_FS is not set
#
# DOS/FAT/NT Filesystems
#
CONFIG_FAT_FS=y
CONFIG_MSDOS_FS=y
CONFIG_VFAT_FS=y
CONFIG_FAT_DEFAULT_CODEPAGE=866
CONFIG_FAT_DEFAULT_IOCHARSET="utf8"
# CONFIG_NTFS_FS is not set
#
# Pseudo filesystems
#
CONFIG_PROC_FS=y
CONFIG_PROC_SYSCTL=y
CONFIG_SYSFS=y
CONFIG_TMPFS=y
# CONFIG_TMPFS_POSIX_ACL is not set
# CONFIG_HUGETLB_PAGE is not set
# CONFIG_CONFIGFS_FS is not set
#
# Miscellaneous filesystems
#
# CONFIG_ADFS_FS is not set
# CONFIG_AFFS_FS is not set
# CONFIG_HFS_FS is not set
# CONFIG_HFSPLUS_FS is not set
# CONFIG_BEFS_FS is not set
# CONFIG_BFS_FS is not set
# CONFIG_EFS_FS is not set
# CONFIG_CRAMFS is not set
# CONFIG_VXFS_FS is not set
# CONFIG_MINIX_FS is not set
# CONFIG_OMFS_FS is not set
# CONFIG_HPFS_FS is not set
# CONFIG_QNX4FS_FS is not set
# CONFIG_ROMFS_FS is not set
# CONFIG_SYSV_FS is not set
# CONFIG_UFS_FS is not set
# CONFIG_NETWORK_FILESYSTEMS is not set
#
# Partition Types
#
# CONFIG_PARTITION_ADVANCED is not set
CONFIG_MSDOS_PARTITION=y
CONFIG_NLS=y
CONFIG_NLS_DEFAULT="utf8"
# CONFIG_NLS_CODEPAGE_437 is not set
# CONFIG_NLS_CODEPAGE_737 is not set
# CONFIG_NLS_CODEPAGE_775 is not set
# CONFIG_NLS_CODEPAGE_850 is not set
# CONFIG_NLS_CODEPAGE_852 is not set
# CONFIG_NLS_CODEPAGE_855 is not set
# CONFIG_NLS_CODEPAGE_857 is not set
# CONFIG_NLS_CODEPAGE_860 is not set
# CONFIG_NLS_CODEPAGE_861 is not set
# CONFIG_NLS_CODEPAGE_862 is not set
# CONFIG_NLS_CODEPAGE_863 is not set
# CONFIG_NLS_CODEPAGE_864 is not set
# CONFIG_NLS_CODEPAGE_865 is not set
CONFIG_NLS_CODEPAGE_866=y
# CONFIG_NLS_CODEPAGE_869 is not set
# CONFIG_NLS_CODEPAGE_936 is not set
# CONFIG_NLS_CODEPAGE_950 is not set
# CONFIG_NLS_CODEPAGE_932 is not set
# CONFIG_NLS_CODEPAGE_949 is not set
# CONFIG_NLS_CODEPAGE_874 is not set
# CONFIG_NLS_ISO8859_8 is not set
# CONFIG_NLS_CODEPAGE_1250 is not set
# CONFIG_NLS_CODEPAGE_1251 is not set
# CONFIG_NLS_ASCII is not set
# CONFIG_NLS_ISO8859_1 is not set
# CONFIG_NLS_ISO8859_2 is not set
# CONFIG_NLS_ISO8859_3 is not set
# CONFIG_NLS_ISO8859_4 is not set
# CONFIG_NLS_ISO8859_5 is not set
# CONFIG_NLS_ISO8859_6 is not set
# CONFIG_NLS_ISO8859_7 is not set
# CONFIG_NLS_ISO8859_9 is not set
# CONFIG_NLS_ISO8859_13 is not set
# CONFIG_NLS_ISO8859_14 is not set
# CONFIG_NLS_ISO8859_15 is not set
# CONFIG_NLS_KOI8_R is not set
# CONFIG_NLS_KOI8_U is not set
CONFIG_NLS_UTF8=y
# CONFIG_DLM is not set
#
# Kernel hacking
#
# CONFIG_PRINTK_TIME is not set
CONFIG_ENABLE_WARN_DEPRECATED=y
CONFIG_ENABLE_MUST_CHECK=y
CONFIG_FRAME_WARN=1024
# CONFIG_MAGIC_SYSRQ is not set
# CONFIG_UNUSED_SYMBOLS is not set
# CONFIG_DEBUG_FS is not set
# CONFIG_HEADERS_CHECK is not set
# CONFIG_DEBUG_KERNEL is not set
CONFIG_DEBUG_BUGVERBOSE=y
CONFIG_DEBUG_MEMORY_INIT=y
CONFIG_FRAME_POINTER=y
# CONFIG_LATENCYTOP is not set
CONFIG_SYSCTL_SYSCALL_CHECK=y
CONFIG_HAVE_FTRACE=y
CONFIG_HAVE_DYNAMIC_FTRACE=y
# CONFIG_FTRACE is not set
# CONFIG_IRQSOFF_TRACER is not set
# CONFIG_PREEMPT_TRACER is not set
# CONFIG_SCHED_TRACER is not set
# CONFIG_CONTEXT_SWITCH_TRACER is not set
# CONFIG_SAMPLES is not set
CONFIG_HAVE_ARCH_KGDB=y
CONFIG_DEBUG_USER=y
#
# Security options
#
# CONFIG_KEYS is not set
# CONFIG_SECURITY is not set
# CONFIG_SECURITY_FILE_CAPABILITIES is not set
# CONFIG_CRYPTO is not set
#
# Library routines
#
CONFIG_BITREVERSE=y
# CONFIG_GENERIC_FIND_FIRST_BIT is not set
# CONFIG_GENERIC_FIND_NEXT_BIT is not set
# CONFIG_CRC_CCITT is not set
# CONFIG_CRC16 is not set
CONFIG_CRC_T10DIF=y
# CONFIG_CRC_ITU_T is not set
CONFIG_CRC32=y
# CONFIG_CRC7 is not set
# CONFIG_LIBCRC32C is not set
CONFIG_PLIST=y
CONFIG_HAS_IOMEM=y
CONFIG_HAS_IOPORT=y
CONFIG_HAS_DMA=y

1678
arch/arm/configs/viper_defconfig Normal file
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File diff suppressed because it is too large Load Diff

1741
arch/arm/configs/xm_x270_defconfig
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File diff suppressed because it is too large Load Diff

1806
arch/arm/configs/xm_x2xx_defconfig Normal file
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File diff suppressed because it is too large Load Diff

2
arch/arm/include/asm/bug.h
View File

@ -12,7 +12,7 @@ extern void __bug(const char *file, int line) __attribute__((noreturn));
#else
/* this just causes an oops */
#define BUG() (*(int *)0 = 0)
#define BUG() do { *(int *)0 = 0; } while (1)
#endif

90
arch/arm/include/asm/cacheflush.h
View File

@ -444,94 +444,4 @@ static inline void flush_ioremap_region(unsigned long phys, void __iomem *virt,
dmac_inv_range(start, start + size);
}
#define __cacheid_present(val) (val != read_cpuid(CPUID_ID))
#define __cacheid_type_v7(val) ((val & (7 << 29)) == (4 << 29))
#define __cacheid_vivt_prev7(val) ((val & (15 << 25)) != (14 << 25))
#define __cacheid_vipt_prev7(val) ((val & (15 << 25)) == (14 << 25))
#define __cacheid_vipt_nonaliasing_prev7(val) ((val & (15 << 25 | 1 << 23)) == (14 << 25))
#define __cacheid_vipt_aliasing_prev7(val) ((val & (15 << 25 | 1 << 23)) == (14 << 25 | 1 << 23))
#define __cacheid_vivt(val) (__cacheid_type_v7(val) ? 0 : __cacheid_vivt_prev7(val))
#define __cacheid_vipt(val) (__cacheid_type_v7(val) ? 1 : __cacheid_vipt_prev7(val))
#define __cacheid_vipt_nonaliasing(val) (__cacheid_type_v7(val) ? 1 : __cacheid_vipt_nonaliasing_prev7(val))
#define __cacheid_vipt_aliasing(val) (__cacheid_type_v7(val) ? 0 : __cacheid_vipt_aliasing_prev7(val))
#define __cacheid_vivt_asid_tagged_instr(val) (__cacheid_type_v7(val) ? ((val & (3 << 14)) == (1 << 14)) : 0)
#if defined(CONFIG_CPU_CACHE_VIVT) && !defined(CONFIG_CPU_CACHE_VIPT)
/*
* VIVT caches only
*/
#define cache_is_vivt() 1
#define cache_is_vipt() 0
#define cache_is_vipt_nonaliasing() 0
#define cache_is_vipt_aliasing() 0
#define icache_is_vivt_asid_tagged() 0
#elif !defined(CONFIG_CPU_CACHE_VIVT) && defined(CONFIG_CPU_CACHE_VIPT)
/*
* VIPT caches only
*/
#define cache_is_vivt() 0
#define cache_is_vipt() 1
#define cache_is_vipt_nonaliasing() \
({ \
unsigned int __val = read_cpuid(CPUID_CACHETYPE); \
__cacheid_vipt_nonaliasing(__val); \
})
#define cache_is_vipt_aliasing() \
({ \
unsigned int __val = read_cpuid(CPUID_CACHETYPE); \
__cacheid_vipt_aliasing(__val); \
})
#define icache_is_vivt_asid_tagged() \
({ \
unsigned int __val = read_cpuid(CPUID_CACHETYPE); \
__cacheid_vivt_asid_tagged_instr(__val); \
})
#else
/*
* VIVT or VIPT caches. Note that this is unreliable since ARM926
* and V6 CPUs satisfy the "(val & (15 << 25)) == (14 << 25)" test.
* There's no way to tell from the CacheType register what type (!)
* the cache is.
*/
#define cache_is_vivt() \
({ \
unsigned int __val = read_cpuid(CPUID_CACHETYPE); \
(!__cacheid_present(__val)) || __cacheid_vivt(__val); \
})
#define cache_is_vipt() \
({ \
unsigned int __val = read_cpuid(CPUID_CACHETYPE); \
__cacheid_present(__val) && __cacheid_vipt(__val); \
})
#define cache_is_vipt_nonaliasing() \
({ \
unsigned int __val = read_cpuid(CPUID_CACHETYPE); \
__cacheid_present(__val) && \
__cacheid_vipt_nonaliasing(__val); \
})
#define cache_is_vipt_aliasing() \
({ \
unsigned int __val = read_cpuid(CPUID_CACHETYPE); \
__cacheid_present(__val) && \
__cacheid_vipt_aliasing(__val); \
})
#define icache_is_vivt_asid_tagged() \
({ \
unsigned int __val = read_cpuid(CPUID_CACHETYPE); \
__cacheid_present(__val) && \
__cacheid_vivt_asid_tagged_instr(__val); \
})
#endif
#endif

52
arch/arm/include/asm/cachetype.h Normal file
View File

@ -0,0 +1,52 @@
#ifndef __ASM_ARM_CACHETYPE_H
#define __ASM_ARM_CACHETYPE_H
#define CACHEID_VIVT (1 << 0)
#define CACHEID_VIPT_NONALIASING (1 << 1)
#define CACHEID_VIPT_ALIASING (1 << 2)
#define CACHEID_VIPT (CACHEID_VIPT_ALIASING|CACHEID_VIPT_NONALIASING)
#define CACHEID_ASID_TAGGED (1 << 3)
extern unsigned int cacheid;
#define cache_is_vivt() cacheid_is(CACHEID_VIVT)
#define cache_is_vipt() cacheid_is(CACHEID_VIPT)
#define cache_is_vipt_nonaliasing() cacheid_is(CACHEID_VIPT_NONALIASING)
#define cache_is_vipt_aliasing() cacheid_is(CACHEID_VIPT_ALIASING)
#define icache_is_vivt_asid_tagged() cacheid_is(CACHEID_ASID_TAGGED)
/*
* __LINUX_ARM_ARCH__ is the minimum supported CPU architecture
* Mask out support which will never be present on newer CPUs.
* - v6+ is never VIVT
* - v7+ VIPT never aliases
*/
#if __LINUX_ARM_ARCH__ >= 7
#define __CACHEID_ARCH_MIN (CACHEID_VIPT_NONALIASING | CACHEID_ASID_TAGGED)
#elif __LINUX_ARM_ARCH__ >= 6
#define __CACHEID_ARCH_MIN (~CACHEID_VIVT)
#else
#define __CACHEID_ARCH_MIN (~0)
#endif
/*
* Mask out support which isn't configured
*/
#if defined(CONFIG_CPU_CACHE_VIVT) && !defined(CONFIG_CPU_CACHE_VIPT)
#define __CACHEID_ALWAYS (CACHEID_VIVT)
#define __CACHEID_NEVER (~CACHEID_VIVT)
#elif !defined(CONFIG_CPU_CACHE_VIVT) && defined(CONFIG_CPU_CACHE_VIPT)
#define __CACHEID_ALWAYS (0)
#define __CACHEID_NEVER (CACHEID_VIVT)
#else
#define __CACHEID_ALWAYS (0)
#define __CACHEID_NEVER (0)
#endif
static inline unsigned int __attribute__((pure)) cacheid_is(unsigned int mask)
{
return (__CACHEID_ALWAYS & mask) |
(~__CACHEID_NEVER & __CACHEID_ARCH_MIN & mask & cacheid);
}
#endif

78
arch/arm/include/asm/cnt32_to_63.h
View File

@ -1,78 +0,0 @@
/*
* include/asm/cnt32_to_63.h -- extend a 32-bit counter to 63 bits
*
* Author: Nicolas Pitre
* Created: December 3, 2006
* Copyright: MontaVista Software, Inc.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2
* as published by the Free Software Foundation.
*/
#ifndef __INCLUDE_CNT32_TO_63_H__
#define __INCLUDE_CNT32_TO_63_H__
#include <linux/compiler.h>
#include <asm/types.h>
#include <asm/byteorder.h>
/*
* Prototype: u64 cnt32_to_63(u32 cnt)
* Many hardware clock counters are only 32 bits wide and therefore have
* a relatively short period making wrap-arounds rather frequent. This
* is a problem when implementing sched_clock() for example, where a 64-bit
* non-wrapping monotonic value is expected to be returned.
*
* To overcome that limitation, let's extend a 32-bit counter to 63 bits
* in a completely lock free fashion. Bits 0 to 31 of the clock are provided
* by the hardware while bits 32 to 62 are stored in memory. The top bit in
* memory is used to synchronize with the hardware clock half-period. When
* the top bit of both counters (hardware and in memory) differ then the
* memory is updated with a new value, incrementing it when the hardware
* counter wraps around.
*
* Because a word store in memory is atomic then the incremented value will
* always be in synch with the top bit indicating to any potential concurrent
* reader if the value in memory is up to date or not with regards to the
* needed increment. And any race in updating the value in memory is harmless
* as the same value would simply be stored more than once.
*
* The only restriction for the algorithm to work properly is that this
* code must be executed at least once per each half period of the 32-bit
* counter to properly update the state bit in memory. This is usually not a
* problem in practice, but if it is then a kernel timer could be scheduled
* to manage for this code to be executed often enough.
*
* Note that the top bit (bit 63) in the returned value should be considered
* as garbage. It is not cleared here because callers are likely to use a
* multiplier on the returned value which can get rid of the top bit
* implicitly by making the multiplier even, therefore saving on a runtime
* clear-bit instruction. Otherwise caller must remember to clear the top
* bit explicitly.
*/
/* this is used only to give gcc a clue about good code generation */
typedef union {
struct {
#if defined(__LITTLE_ENDIAN)
u32 lo, hi;
#elif defined(__BIG_ENDIAN)
u32 hi, lo;
#endif
};
u64 val;
} cnt32_to_63_t;
#define cnt32_to_63(cnt_lo) \
({ \
static volatile u32 __m_cnt_hi = 0; \
cnt32_to_63_t __x; \
__x.hi = __m_cnt_hi; \
__x.lo = (cnt_lo); \
if (unlikely((s32)(__x.hi ^ __x.lo) < 0)) \
__m_cnt_hi = __x.hi = (__x.hi ^ 0x80000000) + (__x.hi >> 31); \
__x.val; \
})
#endif

64
arch/arm/include/asm/cputype.h Normal file
View File

@ -0,0 +1,64 @@
#ifndef __ASM_ARM_CPUTYPE_H
#define __ASM_ARM_CPUTYPE_H
#include <linux/stringify.h>
#define CPUID_ID 0
#define CPUID_CACHETYPE 1
#define CPUID_TCM 2
#define CPUID_TLBTYPE 3
#ifdef CONFIG_CPU_CP15
#define read_cpuid(reg) \
({ \
unsigned int __val; \
asm("mrc p15, 0, %0, c0, c0, " __stringify(reg) \
: "=r" (__val) \
: \
: "cc"); \
__val; \
})
#else
extern unsigned int processor_id;
#define read_cpuid(reg) (processor_id)
#endif
/*
* The CPU ID never changes at run time, so we might as well tell the
* compiler that it's constant. Use this function to read the CPU ID
* rather than directly reading processor_id or read_cpuid() directly.
*/
static inline unsigned int __attribute_const__ read_cpuid_id(void)
{
return read_cpuid(CPUID_ID);
}
static inline unsigned int __attribute_const__ read_cpuid_cachetype(void)
{
return read_cpuid(CPUID_CACHETYPE);
}
/*
* Intel's XScale3 core supports some v6 features (supersections, L2)
* but advertises itself as v5 as it does not support the v6 ISA. For
* this reason, we need a way to explicitly test for this type of CPU.
*/
#ifndef CONFIG_CPU_XSC3
#define cpu_is_xsc3() 0
#else
static inline int cpu_is_xsc3(void)
{
if ((read_cpuid_id() & 0xffffe000) == 0x69056000)
return 1;
return 0;
}
#endif
#if !defined(CONFIG_CPU_XSCALE) && !defined(CONFIG_CPU_XSC3)
#define cpu_is_xscale() 0
#else
#define cpu_is_xscale() 1
#endif
#endif

474
arch/arm/include/asm/dma-mapping.h
View File

@ -104,15 +104,14 @@ static inline int dma_mapping_error(struct device *dev, dma_addr_t dma_addr)
* Dummy noncoherent implementation. We don't provide a dma_cache_sync
* function so drivers using this API are highlighted with build warnings.
*/
static inline void *
dma_alloc_noncoherent(struct device *dev, size_t size, dma_addr_t *handle, gfp_t gfp)
static inline void *dma_alloc_noncoherent(struct device *dev, size_t size,
dma_addr_t *handle, gfp_t gfp)
{
return NULL;
}
static inline void
dma_free_noncoherent(struct device *dev, size_t size, void *cpu_addr,
dma_addr_t handle)
static inline void dma_free_noncoherent(struct device *dev, size_t size,
void *cpu_addr, dma_addr_t handle)
{
}
@ -127,8 +126,7 @@ dma_free_noncoherent(struct device *dev, size_t size, void *cpu_addr,
* return the CPU-viewed address, and sets @handle to be the
* device-viewed address.
*/
extern void *
dma_alloc_coherent(struct device *dev, size_t size, dma_addr_t *handle, gfp_t gfp);
extern void *dma_alloc_coherent(struct device *, size_t, dma_addr_t *, gfp_t);
/**
* dma_free_coherent - free memory allocated by dma_alloc_coherent
@ -143,9 +141,7 @@ dma_alloc_coherent(struct device *dev, size_t size, dma_addr_t *handle, gfp_t gf
* References to memory and mappings associated with cpu_addr/handle
* during and after this call executing are illegal.
*/
extern void
dma_free_coherent(struct device *dev, size_t size, void *cpu_addr,
dma_addr_t handle);
extern void dma_free_coherent(struct device *, size_t, void *, dma_addr_t);
/**
* dma_mmap_coherent - map a coherent DMA allocation into user space
@ -159,8 +155,8 @@ dma_free_coherent(struct device *dev, size_t size, void *cpu_addr,
* into user space. The coherent DMA buffer must not be freed by the
* driver until the user space mapping has been released.
*/
int dma_mmap_coherent(struct device *dev, struct vm_area_struct *vma,
void *cpu_addr, dma_addr_t handle, size_t size);
int dma_mmap_coherent(struct device *, struct vm_area_struct *,
void *, dma_addr_t, size_t);
/**
@ -174,282 +170,16 @@ int dma_mmap_coherent(struct device *dev, struct vm_area_struct *vma,
* return the CPU-viewed address, and sets @handle to be the
* device-viewed address.
*/
extern void *
dma_alloc_writecombine(struct device *dev, size_t size, dma_addr_t *handle, gfp_t gfp);
extern void *dma_alloc_writecombine(struct device *, size_t, dma_addr_t *,
gfp_t);
#define dma_free_writecombine(dev,size,cpu_addr,handle) \
dma_free_coherent(dev,size,cpu_addr,handle)
int dma_mmap_writecombine(struct device *dev, struct vm_area_struct *vma,
void *cpu_addr, dma_addr_t handle, size_t size);
int dma_mmap_writecombine(struct device *, struct vm_area_struct *,
void *, dma_addr_t, size_t);
/**
* dma_map_single - map a single buffer for streaming DMA
* @dev: valid struct device pointer, or NULL for ISA and EISA-like devices
* @cpu_addr: CPU direct mapped address of buffer
* @size: size of buffer to map
* @dir: DMA transfer direction
*
* Ensure that any data held in the cache is appropriately discarded
* or written back.
*
* The device owns this memory once this call has completed. The CPU
* can regain ownership by calling dma_unmap_single() or
* dma_sync_single_for_cpu().
*/
#ifndef CONFIG_DMABOUNCE
static inline dma_addr_t
dma_map_single(struct device *dev, void *cpu_addr, size_t size,
enum dma_data_direction dir)
{
if (!arch_is_coherent())
dma_cache_maint(cpu_addr, size, dir);
return virt_to_dma(dev, cpu_addr);
}
#else
extern dma_addr_t dma_map_single(struct device *,void *, size_t, enum dma_data_direction);
#endif
/**
* dma_map_page - map a portion of a page for streaming DMA
* @dev: valid struct device pointer, or NULL for ISA and EISA-like devices
* @page: page that buffer resides in
* @offset: offset into page for start of buffer
* @size: size of buffer to map
* @dir: DMA transfer direction
*
* Ensure that any data held in the cache is appropriately discarded
* or written back.
*
* The device owns this memory once this call has completed. The CPU
* can regain ownership by calling dma_unmap_page() or
* dma_sync_single_for_cpu().
*/
static inline dma_addr_t
dma_map_page(struct device *dev, struct page *page,
unsigned long offset, size_t size,
enum dma_data_direction dir)
{
return dma_map_single(dev, page_address(page) + offset, size, dir);
}
/**
* dma_unmap_single - unmap a single buffer previously mapped
* @dev: valid struct device pointer, or NULL for ISA and EISA-like devices
* @handle: DMA address of buffer
* @size: size of buffer to map
* @dir: DMA transfer direction
*
* Unmap a single streaming mode DMA translation. The handle and size
* must match what was provided in the previous dma_map_single() call.
* All other usages are undefined.
*
* After this call, reads by the CPU to the buffer are guaranteed to see
* whatever the device wrote there.
*/
#ifndef CONFIG_DMABOUNCE
static inline void
dma_unmap_single(struct device *dev, dma_addr_t handle, size_t size,
enum dma_data_direction dir)
{
/* nothing to do */
}
#else
extern void dma_unmap_single(struct device *, dma_addr_t, size_t, enum dma_data_direction);
#endif
/**
* dma_unmap_page - unmap a buffer previously mapped through dma_map_page()
* @dev: valid struct device pointer, or NULL for ISA and EISA-like devices
* @handle: DMA address of buffer
* @size: size of buffer to map
* @dir: DMA transfer direction
*
* Unmap a single streaming mode DMA translation. The handle and size
* must match what was provided in the previous dma_map_single() call.
* All other usages are undefined.
*
* After this call, reads by the CPU to the buffer are guaranteed to see
* whatever the device wrote there.
*/
static inline void
dma_unmap_page(struct device *dev, dma_addr_t handle, size_t size,
enum dma_data_direction dir)
{
dma_unmap_single(dev, handle, size, dir);
}
/**
* dma_map_sg - map a set of SG buffers for streaming mode DMA
* @dev: valid struct device pointer, or NULL for ISA and EISA-like devices
* @sg: list of buffers
* @nents: number of buffers to map
* @dir: DMA transfer direction
*
* Map a set of buffers described by scatterlist in streaming
* mode for DMA. This is the scatter-gather version of the
* above dma_map_single interface. Here the scatter gather list
* elements are each tagged with the appropriate dma address
* and length. They are obtained via sg_dma_{address,length}(SG).
*
* NOTE: An implementation may be able to use a smaller number of
* DMA address/length pairs than there are SG table elements.
* (for example via virtual mapping capabilities)
* The routine returns the number of addr/length pairs actually
* used, at most nents.
*
* Device ownership issues as mentioned above for dma_map_single are
* the same here.
*/
#ifndef CONFIG_DMABOUNCE
static inline int
dma_map_sg(struct device *dev, struct scatterlist *sg, int nents,
enum dma_data_direction dir)
{
int i;
for (i = 0; i < nents; i++, sg++) {
char *virt;
sg->dma_address = page_to_dma(dev, sg_page(sg)) + sg->offset;
virt = sg_virt(sg);
if (!arch_is_coherent())
dma_cache_maint(virt, sg->length, dir);
}
return nents;
}
#else
extern int dma_map_sg(struct device *, struct scatterlist *, int, enum dma_data_direction);
#endif
/**
* dma_unmap_sg - unmap a set of SG buffers mapped by dma_map_sg
* @dev: valid struct device pointer, or NULL for ISA and EISA-like devices
* @sg: list of buffers
* @nents: number of buffers to map
* @dir: DMA transfer direction
*
* Unmap a set of streaming mode DMA translations.
* Again, CPU read rules concerning calls here are the same as for
* dma_unmap_single() above.
*/
#ifndef CONFIG_DMABOUNCE
static inline void
dma_unmap_sg(struct device *dev, struct scatterlist *sg, int nents,
enum dma_data_direction dir)
{
/* nothing to do */
}
#else
extern void dma_unmap_sg(struct device *, struct scatterlist *, int, enum dma_data_direction);
#endif
/**
* dma_sync_single_range_for_cpu
* @dev: valid struct device pointer, or NULL for ISA and EISA-like devices
* @handle: DMA address of buffer
* @offset: offset of region to start sync
* @size: size of region to sync
* @dir: DMA transfer direction (same as passed to dma_map_single)
*
* Make physical memory consistent for a single streaming mode DMA
* translation after a transfer.
*
* If you perform a dma_map_single() but wish to interrogate the
* buffer using the cpu, yet do not wish to teardown the PCI dma
* mapping, you must call this function before doing so. At the
* next point you give the PCI dma address back to the card, you
* must first the perform a dma_sync_for_device, and then the
* device again owns the buffer.
*/
#ifndef CONFIG_DMABOUNCE
static inline void
dma_sync_single_range_for_cpu(struct device *dev, dma_addr_t handle,
unsigned long offset, size_t size,
enum dma_data_direction dir)
{
if (!arch_is_coherent())
dma_cache_maint(dma_to_virt(dev, handle) + offset, size, dir);
}
static inline void
dma_sync_single_range_for_device(struct device *dev, dma_addr_t handle,
unsigned long offset, size_t size,
enum dma_data_direction dir)
{
if (!arch_is_coherent())
dma_cache_maint(dma_to_virt(dev, handle) + offset, size, dir);
}
#else
extern void dma_sync_single_range_for_cpu(struct device *, dma_addr_t, unsigned long, size_t, enum dma_data_direction);
extern void dma_sync_single_range_for_device(struct device *, dma_addr_t, unsigned long, size_t, enum dma_data_direction);
#endif
static inline void
dma_sync_single_for_cpu(struct device *dev, dma_addr_t handle, size_t size,
enum dma_data_direction dir)
{
dma_sync_single_range_for_cpu(dev, handle, 0, size, dir);
}
static inline void
dma_sync_single_for_device(struct device *dev, dma_addr_t handle, size_t size,
enum dma_data_direction dir)
{
dma_sync_single_range_for_device(dev, handle, 0, size, dir);
}
/**
* dma_sync_sg_for_cpu
* @dev: valid struct device pointer, or NULL for ISA and EISA-like devices
* @sg: list of buffers
* @nents: number of buffers to map
* @dir: DMA transfer direction
*
* Make physical memory consistent for a set of streaming
* mode DMA translations after a transfer.
*
* The same as dma_sync_single_for_* but for a scatter-gather list,
* same rules and usage.
*/
#ifndef CONFIG_DMABOUNCE
static inline void
dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg, int nents,
enum dma_data_direction dir)
{
int i;
for (i = 0; i < nents; i++, sg++) {
char *virt = sg_virt(sg);
if (!arch_is_coherent())
dma_cache_maint(virt, sg->length, dir);
}
}
static inline void
dma_sync_sg_for_device(struct device *dev, struct scatterlist *sg, int nents,
enum dma_data_direction dir)
{
int i;
for (i = 0; i < nents; i++, sg++) {
char *virt = sg_virt(sg);
if (!arch_is_coherent())
dma_cache_maint(virt, sg->length, dir);
}
}
#else
extern void dma_sync_sg_for_cpu(struct device*, struct scatterlist*, int, enum dma_data_direction);
extern void dma_sync_sg_for_device(struct device*, struct scatterlist*, int, enum dma_data_direction);
#endif
#ifdef CONFIG_DMABOUNCE
/*
* For SA-1111, IXP425, and ADI systems the dma-mapping functions are "magic"
@ -475,7 +205,8 @@ extern void dma_sync_sg_for_device(struct device*, struct scatterlist*, int, enu
* appropriate DMA pools for the device.
*
*/
extern int dmabounce_register_dev(struct device *, unsigned long, unsigned long);
extern int dmabounce_register_dev(struct device *, unsigned long,
unsigned long);
/**
* dmabounce_unregister_dev
@ -506,7 +237,184 @@ extern void dmabounce_unregister_dev(struct device *);
*
*/
extern int dma_needs_bounce(struct device*, dma_addr_t, size_t);
/*
* The DMA API, implemented by dmabounce.c. See below for descriptions.
*/
extern dma_addr_t dma_map_single(struct device *, void *, size_t,
enum dma_data_direction);
extern dma_addr_t dma_map_page(struct device *, struct page *,
unsigned long, size_t, enum dma_data_direction);
extern void dma_unmap_single(struct device *, dma_addr_t, size_t,
enum dma_data_direction);
/*
* Private functions
*/
int dmabounce_sync_for_cpu(struct device *, dma_addr_t, unsigned long,
size_t, enum dma_data_direction);
int dmabounce_sync_for_device(struct device *, dma_addr_t, unsigned long,
size_t, enum dma_data_direction);
#else
#define dmabounce_sync_for_cpu(dev,dma,off,sz,dir) (1)
#define dmabounce_sync_for_device(dev,dma,off,sz,dir) (1)
/**
* dma_map_single - map a single buffer for streaming DMA
* @dev: valid struct device pointer, or NULL for ISA and EISA-like devices
* @cpu_addr: CPU direct mapped address of buffer
* @size: size of buffer to map
* @dir: DMA transfer direction
*
* Ensure that any data held in the cache is appropriately discarded
* or written back.
*
* The device owns this memory once this call has completed. The CPU
* can regain ownership by calling dma_unmap_single() or
* dma_sync_single_for_cpu().
*/
static inline dma_addr_t dma_map_single(struct device *dev, void *cpu_addr,
size_t size, enum dma_data_direction dir)
{
BUG_ON(!valid_dma_direction(dir));
if (!arch_is_coherent())
dma_cache_maint(cpu_addr, size, dir);
return virt_to_dma(dev, cpu_addr);
}
/**
* dma_map_page - map a portion of a page for streaming DMA
* @dev: valid struct device pointer, or NULL for ISA and EISA-like devices
* @page: page that buffer resides in
* @offset: offset into page for start of buffer
* @size: size of buffer to map
* @dir: DMA transfer direction
*
* Ensure that any data held in the cache is appropriately discarded
* or written back.
*
* The device owns this memory once this call has completed. The CPU
* can regain ownership by calling dma_unmap_page().
*/
static inline dma_addr_t dma_map_page(struct device *dev, struct page *page,
unsigned long offset, size_t size, enum dma_data_direction dir)
{
BUG_ON(!valid_dma_direction(dir));
if (!arch_is_coherent())
dma_cache_maint(page_address(page) + offset, size, dir);
return page_to_dma(dev, page) + offset;
}
/**
* dma_unmap_single - unmap a single buffer previously mapped
* @dev: valid struct device pointer, or NULL for ISA and EISA-like devices
* @handle: DMA address of buffer
* @size: size of buffer (same as passed to dma_map_single)
* @dir: DMA transfer direction (same as passed to dma_map_single)
*
* Unmap a single streaming mode DMA translation. The handle and size
* must match what was provided in the previous dma_map_single() call.
* All other usages are undefined.
*
* After this call, reads by the CPU to the buffer are guaranteed to see
* whatever the device wrote there.
*/
static inline void dma_unmap_single(struct device *dev, dma_addr_t handle,
size_t size, enum dma_data_direction dir)
{
/* nothing to do */
}
#endif /* CONFIG_DMABOUNCE */
/**
* dma_unmap_page - unmap a buffer previously mapped through dma_map_page()
* @dev: valid struct device pointer, or NULL for ISA and EISA-like devices
* @handle: DMA address of buffer
* @size: size of buffer (same as passed to dma_map_page)
* @dir: DMA transfer direction (same as passed to dma_map_page)
*
* Unmap a page streaming mode DMA translation. The handle and size
* must match what was provided in the previous dma_map_page() call.
* All other usages are undefined.
*
* After this call, reads by the CPU to the buffer are guaranteed to see
* whatever the device wrote there.
*/
static inline void dma_unmap_page(struct device *dev, dma_addr_t handle,
size_t size, enum dma_data_direction dir)
{
dma_unmap_single(dev, handle, size, dir);
}
/**
* dma_sync_single_range_for_cpu
* @dev: valid struct device pointer, or NULL for ISA and EISA-like devices
* @handle: DMA address of buffer
* @offset: offset of region to start sync
* @size: size of region to sync
* @dir: DMA transfer direction (same as passed to dma_map_single)
*
* Make physical memory consistent for a single streaming mode DMA
* translation after a transfer.
*
* If you perform a dma_map_single() but wish to interrogate the
* buffer using the cpu, yet do not wish to teardown the PCI dma
* mapping, you must call this function before doing so. At the
* next point you give the PCI dma address back to the card, you
* must first the perform a dma_sync_for_device, and then the
* device again owns the buffer.
*/
static inline void dma_sync_single_range_for_cpu(struct device *dev,
dma_addr_t handle, unsigned long offset, size_t size,
enum dma_data_direction dir)
{
BUG_ON(!valid_dma_direction(dir));
dmabounce_sync_for_cpu(dev, handle, offset, size, dir);
}
static inline void dma_sync_single_range_for_device(struct device *dev,
dma_addr_t handle, unsigned long offset, size_t size,
enum dma_data_direction dir)
{
BUG_ON(!valid_dma_direction(dir));
if (!dmabounce_sync_for_device(dev, handle, offset, size, dir))
return;
if (!arch_is_coherent())
dma_cache_maint(dma_to_virt(dev, handle) + offset, size, dir);
}
static inline void dma_sync_single_for_cpu(struct device *dev,
dma_addr_t handle, size_t size, enum dma_data_direction dir)
{
dma_sync_single_range_for_cpu(dev, handle, 0, size, dir);
}
static inline void dma_sync_single_for_device(struct device *dev,
dma_addr_t handle, size_t size, enum dma_data_direction dir)
{
dma_sync_single_range_for_device(dev, handle, 0, size, dir);
}
/*
* The scatter list versions of the above methods.
*/
extern int dma_map_sg(struct device *, struct scatterlist *, int,
enum dma_data_direction);
extern void dma_unmap_sg(struct device *, struct scatterlist *, int,
enum dma_data_direction);
extern void dma_sync_sg_for_cpu(struct device *, struct scatterlist *, int,
enum dma_data_direction);
extern void dma_sync_sg_for_device(struct device *, struct scatterlist *, int,
enum dma_data_direction);
#endif /* __KERNEL__ */
#endif

72
arch/arm/include/asm/elf.h
View File

@ -3,7 +3,6 @@
#include <asm/hwcap.h>
#ifndef __ASSEMBLY__
/*
* ELF register definitions..
*/
@ -17,12 +16,34 @@ typedef unsigned long elf_freg_t[3];
typedef elf_greg_t elf_gregset_t[ELF_NGREG];
typedef struct user_fp elf_fpregset_t;
#endif
#define EM_ARM 40
#define EF_ARM_APCS26 0x08
#define EF_ARM_SOFT_FLOAT 0x200
#define EF_ARM_EABI_MASK 0xFF000000
#define EF_ARM_EABI_MASK 0xff000000
#define EF_ARM_EABI_UNKNOWN 0x00000000
#define EF_ARM_EABI_VER1 0x01000000
#define EF_ARM_EABI_VER2 0x02000000
#define EF_ARM_EABI_VER3 0x03000000
#define EF_ARM_EABI_VER4 0x04000000
#define EF_ARM_EABI_VER5 0x05000000
#define EF_ARM_BE8 0x00800000 /* ABI 4,5 */
#define EF_ARM_LE8 0x00400000 /* ABI 4,5 */
#define EF_ARM_MAVERICK_FLOAT 0x00000800 /* ABI 0 */
#define EF_ARM_VFP_FLOAT 0x00000400 /* ABI 0 */
#define EF_ARM_SOFT_FLOAT 0x00000200 /* ABI 0 */
#define EF_ARM_OLD_ABI 0x00000100 /* ABI 0 */
#define EF_ARM_NEW_ABI 0x00000080 /* ABI 0 */
#define EF_ARM_ALIGN8 0x00000040 /* ABI 0 */
#define EF_ARM_PIC 0x00000020 /* ABI 0 */
#define EF_ARM_MAPSYMSFIRST 0x00000010 /* ABI 2 */
#define EF_ARM_APCS_FLOAT 0x00000010 /* ABI 0, floats in fp regs */
#define EF_ARM_DYNSYMSUSESEGIDX 0x00000008 /* ABI 2 */
#define EF_ARM_APCS_26 0x00000008 /* ABI 0 */
#define EF_ARM_SYMSARESORTED 0x00000004 /* ABI 1,2 */
#define EF_ARM_INTERWORK 0x00000004 /* ABI 0 */
#define EF_ARM_HASENTRY 0x00000002 /* All */
#define EF_ARM_RELEXEC 0x00000001 /* All */
#define R_ARM_NONE 0
#define R_ARM_PC24 1
@ -41,7 +62,6 @@ typedef struct user_fp elf_fpregset_t;
#endif
#define ELF_ARCH EM_ARM
#ifndef __ASSEMBLY__
/*
* This yields a string that ld.so will use to load implementation
* specific libraries for optimization. This is more specific in
@ -59,25 +79,17 @@ typedef struct user_fp elf_fpregset_t;
#define ELF_PLATFORM (elf_platform)
extern char elf_platform[];
#endif
struct elf32_hdr;
/*
* This is used to ensure we don't load something for the wrong architecture.
*/
#define elf_check_arch(x) ((x)->e_machine == EM_ARM && ELF_PROC_OK(x))
extern int elf_check_arch(const struct elf32_hdr *);
#define elf_check_arch elf_check_arch
/*
* 32-bit code is always OK. Some cpus can do 26-bit, some can't.
*/
#define ELF_PROC_OK(x) (ELF_THUMB_OK(x) && ELF_26BIT_OK(x))
#define ELF_THUMB_OK(x) \
((elf_hwcap & HWCAP_THUMB && ((x)->e_entry & 1) == 1) || \
((x)->e_entry & 3) == 0)
#define ELF_26BIT_OK(x) \
((elf_hwcap & HWCAP_26BIT && (x)->e_flags & EF_ARM_APCS26) || \
((x)->e_flags & EF_ARM_APCS26) == 0)
extern int arm_elf_read_implies_exec(const struct elf32_hdr *, int);
#define elf_read_implies_exec(ex,stk) arm_elf_read_implies_exec(&(ex), stk)
#define USE_ELF_CORE_DUMP
#define ELF_EXEC_PAGESIZE 4096
@ -94,23 +106,7 @@ extern char elf_platform[];
have no such handler. */
#define ELF_PLAT_INIT(_r, load_addr) (_r)->ARM_r0 = 0
/*
* Since the FPA coprocessor uses CP1 and CP2, and iWMMXt uses CP0
* and CP1, we only enable access to the iWMMXt coprocessor if the
* binary is EABI or softfloat (and thus, guaranteed not to use
* FPA instructions.)
*/
#define SET_PERSONALITY(ex, ibcs2) \
do { \
if ((ex).e_flags & EF_ARM_APCS26) { \
set_personality(PER_LINUX); \
} else { \
set_personality(PER_LINUX_32BIT); \
if (elf_hwcap & HWCAP_IWMMXT && (ex).e_flags & (EF_ARM_EABI_MASK | EF_ARM_SOFT_FLOAT)) \
set_thread_flag(TIF_USING_IWMMXT); \
else \
clear_thread_flag(TIF_USING_IWMMXT); \
} \
} while (0)
extern void elf_set_personality(const struct elf32_hdr *);
#define SET_PERSONALITY(ex, ibcs2) elf_set_personality(&(ex))
#endif

124
arch/arm/include/asm/futex.h
View File

@ -1,6 +1,124 @@
#ifndef _ASM_FUTEX_H
#define _ASM_FUTEX_H
#ifndef _ASM_ARM_FUTEX_H
#define _ASM_ARM_FUTEX_H
#ifdef __KERNEL__
#ifdef CONFIG_SMP
#include <asm-generic/futex.h>
#endif
#else /* !SMP, we can work around lack of atomic ops by disabling preemption */
#include <linux/futex.h>
#include <linux/preempt.h>
#include <linux/uaccess.h>
#include <asm/errno.h>
#define __futex_atomic_op(insn, ret, oldval, uaddr, oparg) \
__asm__ __volatile__( \
"1: ldrt %1, [%2]\n" \
" " insn "\n" \
"2: strt %0, [%2]\n" \
" mov %0, #0\n" \
"3:\n" \
" .section __ex_table,\"a\"\n" \
" .align 3\n" \
" .long 1b, 4f, 2b, 4f\n" \
" .previous\n" \
" .section .fixup,\"ax\"\n" \
"4: mov %0, %4\n" \
" b 3b\n" \
" .previous" \
: "=&r" (ret), "=&r" (oldval) \
: "r" (uaddr), "r" (oparg), "Ir" (-EFAULT) \
: "cc", "memory")
static inline int
futex_atomic_op_inuser (int encoded_op, int __user *uaddr)
{
int op = (encoded_op >> 28) & 7;
int cmp = (encoded_op >> 24) & 15;
int oparg = (encoded_op << 8) >> 20;
int cmparg = (encoded_op << 20) >> 20;
int oldval = 0, ret;
if (encoded_op & (FUTEX_OP_OPARG_SHIFT << 28))
oparg = 1 << oparg;
if (!access_ok(VERIFY_WRITE, uaddr, sizeof(int)))
return -EFAULT;
pagefault_disable(); /* implies preempt_disable() */
switch (op) {
case FUTEX_OP_SET:
__futex_atomic_op("mov %0, %3", ret, oldval, uaddr, oparg);
break;
case FUTEX_OP_ADD:
__futex_atomic_op("add %0, %1, %3", ret, oldval, uaddr, oparg);
break;
case FUTEX_OP_OR:
__futex_atomic_op("orr %0, %1, %3", ret, oldval, uaddr, oparg);
break;
case FUTEX_OP_ANDN:
__futex_atomic_op("and %0, %1, %3", ret, oldval, uaddr, ~oparg);
break;
case FUTEX_OP_XOR:
__futex_atomic_op("eor %0, %1, %3", ret, oldval, uaddr, oparg);
break;
default:
ret = -ENOSYS;
}
pagefault_enable(); /* subsumes preempt_enable() */
if (!ret) {
switch (cmp) {
case FUTEX_OP_CMP_EQ: ret = (oldval == cmparg); break;
case FUTEX_OP_CMP_NE: ret = (oldval != cmparg); break;
case FUTEX_OP_CMP_LT: ret = (oldval < cmparg); break;
case FUTEX_OP_CMP_GE: ret = (oldval >= cmparg); break;
case FUTEX_OP_CMP_LE: ret = (oldval <= cmparg); break;
case FUTEX_OP_CMP_GT: ret = (oldval > cmparg); break;
default: ret = -ENOSYS;
}
}
return ret;
}
static inline int
futex_atomic_cmpxchg_inatomic(int __user *uaddr, int oldval, int newval)
{
int val;
if (!access_ok(VERIFY_WRITE, uaddr, sizeof(int)))
return -EFAULT;
pagefault_disable(); /* implies preempt_disable() */
__asm__ __volatile__("@futex_atomic_cmpxchg_inatomic\n"
"1: ldrt %0, [%3]\n"
" teq %0, %1\n"
"2: streqt %2, [%3]\n"
"3:\n"
" .section __ex_table,\"a\"\n"
" .align 3\n"
" .long 1b, 4f, 2b, 4f\n"
" .previous\n"
" .section .fixup,\"ax\"\n"
"4: mov %0, %4\n"
" b 3b\n"
" .previous"
: "=&r" (val)
: "r" (oldval), "r" (newval), "r" (uaddr), "Ir" (-EFAULT)
: "cc", "memory");
pagefault_enable(); /* subsumes preempt_enable() */
return val;
}
#endif /* !SMP */
#endif /* __KERNEL__ */
#endif /* _ASM_ARM_FUTEX_H */

5
arch/arm/include/asm/io.h
View File

@ -60,10 +60,9 @@ extern void __raw_readsl(const void __iomem *addr, void *data, int longlen);
#define MT_DEVICE 0
#define MT_DEVICE_NONSHARED 1
#define MT_DEVICE_CACHED 2
#define MT_DEVICE_IXP2000 3
#define MT_DEVICE_WC 4
#define MT_DEVICE_WC 3
/*
* types 5 onwards can be found in asm/mach/map.h and are undefined
* types 4 onwards can be found in asm/mach/map.h and are undefined
* for ioremap
*/

4
arch/arm/include/asm/irq.h
View File

@ -22,6 +22,10 @@
#ifndef __ASSEMBLY__
struct irqaction;
extern void migrate_irqs(void);
extern void asm_do_IRQ(unsigned int, struct pt_regs *);
void init_IRQ(void);
#endif
#endif

1
arch/arm/include/asm/kprobes.h
View File

@ -61,7 +61,6 @@ struct kprobe_ctlblk {
void arch_remove_kprobe(struct kprobe *);
void kretprobe_trampoline(void);
int kprobe_trap_handler(struct pt_regs *regs, unsigned int instr);
int kprobe_fault_handler(struct pt_regs *regs, unsigned int fsr);
int kprobe_exceptions_notify(struct notifier_block *self,
unsigned long val, void *data);

17
arch/arm/include/asm/mach/map.h
View File

@ -18,16 +18,13 @@ struct map_desc {
unsigned int type;
};
/* types 0-4 are defined in asm/io.h */
#define MT_CACHECLEAN 5
#define MT_MINICLEAN 6
#define MT_LOW_VECTORS 7
#define MT_HIGH_VECTORS 8
#define MT_MEMORY 9
#define MT_ROM 10
#define MT_NONSHARED_DEVICE MT_DEVICE_NONSHARED
#define MT_IXP2000_DEVICE MT_DEVICE_IXP2000
/* types 0-3 are defined in asm/io.h */
#define MT_CACHECLEAN 4
#define MT_MINICLEAN 5
#define MT_LOW_VECTORS 6
#define MT_HIGH_VECTORS 7
#define MT_MEMORY 8
#define MT_ROM 9
#ifdef CONFIG_MMU
extern void iotable_init(struct map_desc *, int);

3
arch/arm/include/asm/mach/udc_pxa2xx.h
View File

@ -18,8 +18,7 @@ struct pxa2xx_udc_mach_info {
/* Boards following the design guidelines in the developer's manual,
* with on-chip GPIOs not Lubbock's weird hardware, can have a sane
* VBUS IRQ and omit the methods above. Store the GPIO number
* here; for GPIO 0, also mask in one of the pxa_gpio_mode() bits.
* Note that sometimes the signals go through inverters...
* here. Note that sometimes the signals go through inverters...
*/
bool gpio_vbus_inverted;
u16 gpio_vbus; /* high == vbus present */

2
arch/arm/include/asm/mc146818rtc.h
View File

@ -4,8 +4,8 @@
#ifndef _ASM_MC146818RTC_H
#define _ASM_MC146818RTC_H
#include <linux/io.h>
#include <mach/irqs.h>
#include <asm/io.h>
#ifndef RTC_PORT
#define RTC_PORT(x) (0x70 + (x))

40
arch/arm/include/asm/memory.h
View File

@ -13,43 +13,33 @@
#ifndef __ASM_ARM_MEMORY_H
#define __ASM_ARM_MEMORY_H
#include <linux/compiler.h>
#include <linux/const.h>
#include <mach/memory.h>
#include <asm/sizes.h>
/*
* Allow for constants defined here to be used from assembly code
* by prepending the UL suffix only with actual C code compilation.
*/
#ifndef __ASSEMBLY__
#define UL(x) (x##UL)
#else
#define UL(x) (x)
#endif
#include <linux/compiler.h>
#include <mach/memory.h>
#include <asm/sizes.h>
#define UL(x) _AC(x, UL)
#ifdef CONFIG_MMU
#ifndef TASK_SIZE
/*
* PAGE_OFFSET - the virtual address of the start of the kernel image
* TASK_SIZE - the maximum size of a user space task.
* TASK_UNMAPPED_BASE - the lower boundary of the mmap VM area
*/
#define TASK_SIZE UL(0xbf000000)
#define TASK_UNMAPPED_BASE UL(0x40000000)
#endif
#define PAGE_OFFSET UL(CONFIG_PAGE_OFFSET)
#define TASK_SIZE (UL(CONFIG_PAGE_OFFSET) - UL(0x01000000))
#define TASK_UNMAPPED_BASE (UL(CONFIG_PAGE_OFFSET) / 3)
/*
* The maximum size of a 26-bit user space task.
*/
#define TASK_SIZE_26 UL(0x04000000)
/*
* Page offset: 3GB
*/
#ifndef PAGE_OFFSET
#define PAGE_OFFSET UL(0xc0000000)
#endif
/*
* The module space lives between the addresses given by TASK_SIZE
* and PAGE_OFFSET - it must be within 32MB of the kernel text.
@ -147,16 +137,10 @@
#ifndef arch_adjust_zones
#define arch_adjust_zones(node,size,holes) do { } while (0)
#elif !defined(CONFIG_ZONE_DMA)
#error "custom arch_adjust_zones() requires CONFIG_ZONE_DMA"
#endif
/*
* Amount of memory reserved for the vmalloc() area, and minimum
* address for vmalloc mappings.
*/
extern unsigned long vmalloc_reserve;
#define VMALLOC_MIN (void *)(VMALLOC_END - vmalloc_reserve)
/*
* PFNs are used to describe any physical page; this means
* PFN 0 == physical address 0.

1
arch/arm/include/asm/mmu_context.h
View File

@ -15,6 +15,7 @@
#include <linux/compiler.h>
#include <asm/cacheflush.h>
#include <asm/cachetype.h>
#include <asm/proc-fns.h>
#include <asm-generic/mm_hooks.h>

5
arch/arm/include/asm/page.h
View File

@ -184,8 +184,9 @@ typedef struct page *pgtable_t;
#endif /* !__ASSEMBLY__ */
#define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \
VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
#define VM_DATA_DEFAULT_FLAGS \
(((current->personality & READ_IMPLIES_EXEC) ? VM_EXEC : 0) | \
VM_READ | VM_WRITE | VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
/*
* With EABI on ARMv5 and above we must have 64-bit aligned slab pointers.

86
arch/arm/include/asm/pgtable.h
View File

@ -164,14 +164,30 @@ extern void __pgd_error(const char *file, int line, unsigned long val);
#define L_PTE_PRESENT (1 << 0)
#define L_PTE_FILE (1 << 1) /* only when !PRESENT */
#define L_PTE_YOUNG (1 << 1)
#define L_PTE_BUFFERABLE (1 << 2) /* matches PTE */
#define L_PTE_CACHEABLE (1 << 3) /* matches PTE */
#define L_PTE_USER (1 << 4)
#define L_PTE_WRITE (1 << 5)
#define L_PTE_EXEC (1 << 6)
#define L_PTE_DIRTY (1 << 7)
#define L_PTE_BUFFERABLE (1 << 2) /* obsolete, matches PTE */
#define L_PTE_CACHEABLE (1 << 3) /* obsolete, matches PTE */
#define L_PTE_DIRTY (1 << 6)
#define L_PTE_WRITE (1 << 7)
#define L_PTE_USER (1 << 8)
#define L_PTE_EXEC (1 << 9)
#define L_PTE_SHARED (1 << 10) /* shared(v6), coherent(xsc3) */
/*
* These are the memory types, defined to be compatible with
* pre-ARMv6 CPUs cacheable and bufferable bits: XXCB
*/
#define L_PTE_MT_UNCACHED (0x00 << 2) /* 0000 */
#define L_PTE_MT_BUFFERABLE (0x01 << 2) /* 0001 */
#define L_PTE_MT_WRITETHROUGH (0x02 << 2) /* 0010 */
#define L_PTE_MT_WRITEBACK (0x03 << 2) /* 0011 */
#define L_PTE_MT_MINICACHE (0x06 << 2) /* 0110 (sa1100, xscale) */
#define L_PTE_MT_WRITEALLOC (0x07 << 2) /* 0111 */
#define L_PTE_MT_DEV_SHARED (0x04 << 2) /* 0100 */
#define L_PTE_MT_DEV_NONSHARED (0x0c << 2) /* 1100 */
#define L_PTE_MT_DEV_WC (0x09 << 2) /* 1001 */
#define L_PTE_MT_DEV_CACHED (0x0b << 2) /* 1011 */
#define L_PTE_MT_MASK (0x0f << 2)
#ifndef __ASSEMBLY__
/*
@ -180,23 +196,30 @@ extern void __pgd_error(const char *file, int line, unsigned long val);
* as well as any architecture dependent bits like global/ASID and SMP
* shared mapping bits.
*/
#define _L_PTE_DEFAULT L_PTE_PRESENT | L_PTE_YOUNG | L_PTE_CACHEABLE | L_PTE_BUFFERABLE
#define _L_PTE_READ L_PTE_USER | L_PTE_EXEC
#define _L_PTE_DEFAULT L_PTE_PRESENT | L_PTE_YOUNG
extern pgprot_t pgprot_user;
extern pgprot_t pgprot_kernel;
#define PAGE_NONE pgprot_user
#define PAGE_COPY __pgprot(pgprot_val(pgprot_user) | _L_PTE_READ)
#define PAGE_SHARED __pgprot(pgprot_val(pgprot_user) | _L_PTE_READ | \
L_PTE_WRITE)
#define PAGE_READONLY __pgprot(pgprot_val(pgprot_user) | _L_PTE_READ)
#define PAGE_KERNEL pgprot_kernel
#define _MOD_PROT(p, b) __pgprot(pgprot_val(p) | (b))
#define __PAGE_NONE __pgprot(_L_PTE_DEFAULT)
#define __PAGE_COPY __pgprot(_L_PTE_DEFAULT | _L_PTE_READ)
#define __PAGE_SHARED __pgprot(_L_PTE_DEFAULT | _L_PTE_READ | L_PTE_WRITE)
#define __PAGE_READONLY __pgprot(_L_PTE_DEFAULT | _L_PTE_READ)
#define PAGE_NONE pgprot_user
#define PAGE_SHARED _MOD_PROT(pgprot_user, L_PTE_USER | L_PTE_WRITE)
#define PAGE_SHARED_EXEC _MOD_PROT(pgprot_user, L_PTE_USER | L_PTE_WRITE | L_PTE_EXEC)
#define PAGE_COPY _MOD_PROT(pgprot_user, L_PTE_USER)
#define PAGE_COPY_EXEC _MOD_PROT(pgprot_user, L_PTE_USER | L_PTE_EXEC)
#define PAGE_READONLY _MOD_PROT(pgprot_user, L_PTE_USER)
#define PAGE_READONLY_EXEC _MOD_PROT(pgprot_user, L_PTE_USER | L_PTE_EXEC)
#define PAGE_KERNEL pgprot_kernel
#define PAGE_KERNEL_EXEC _MOD_PROT(pgprot_kernel, L_PTE_EXEC)
#define __PAGE_NONE __pgprot(_L_PTE_DEFAULT)
#define __PAGE_SHARED __pgprot(_L_PTE_DEFAULT | L_PTE_USER | L_PTE_WRITE)
#define __PAGE_SHARED_EXEC __pgprot(_L_PTE_DEFAULT | L_PTE_USER | L_PTE_WRITE | L_PTE_EXEC)
#define __PAGE_COPY __pgprot(_L_PTE_DEFAULT | L_PTE_USER)
#define __PAGE_COPY_EXEC __pgprot(_L_PTE_DEFAULT | L_PTE_USER | L_PTE_EXEC)
#define __PAGE_READONLY __pgprot(_L_PTE_DEFAULT | L_PTE_USER)
#define __PAGE_READONLY_EXEC __pgprot(_L_PTE_DEFAULT | L_PTE_USER | L_PTE_EXEC)
#endif /* __ASSEMBLY__ */
@ -212,19 +235,19 @@ extern pgprot_t pgprot_kernel;
#define __P001 __PAGE_READONLY
#define __P010 __PAGE_COPY
#define __P011 __PAGE_COPY
#define __P100 __PAGE_READONLY
#define __P101 __PAGE_READONLY
#define __P110 __PAGE_COPY
#define __P111 __PAGE_COPY
#define __P100 __PAGE_READONLY_EXEC
#define __P101 __PAGE_READONLY_EXEC
#define __P110 __PAGE_COPY_EXEC
#define __P111 __PAGE_COPY_EXEC
#define __S000 __PAGE_NONE
#define __S001 __PAGE_READONLY
#define __S010 __PAGE_SHARED
#define __S011 __PAGE_SHARED
#define __S100 __PAGE_READONLY
#define __S101 __PAGE_READONLY
#define __S110 __PAGE_SHARED
#define __S111 __PAGE_SHARED
#define __S100 __PAGE_READONLY_EXEC
#define __S101 __PAGE_READONLY_EXEC
#define __S110 __PAGE_SHARED_EXEC
#define __S111 __PAGE_SHARED_EXEC
#ifndef __ASSEMBLY__
/*
@ -286,8 +309,10 @@ static inline pte_t pte_mkspecial(pte_t pte) { return pte; }
/*
* Mark the prot value as uncacheable and unbufferable.
*/
#define pgprot_noncached(prot) __pgprot(pgprot_val(prot) & ~(L_PTE_CACHEABLE | L_PTE_BUFFERABLE))
#define pgprot_writecombine(prot) __pgprot(pgprot_val(prot) & ~L_PTE_CACHEABLE)
#define pgprot_noncached(prot) \
__pgprot((pgprot_val(prot) & ~L_PTE_MT_MASK) | L_PTE_MT_UNCACHED)
#define pgprot_writecombine(prot) \
__pgprot((pgprot_val(prot) & ~L_PTE_MT_MASK) | L_PTE_MT_BUFFERABLE)
#define pmd_none(pmd) (!pmd_val(pmd))
#define pmd_present(pmd) (pmd_val(pmd))
@ -319,11 +344,6 @@ static inline pte_t *pmd_page_vaddr(pmd_t pmd)
#define pmd_page(pmd) virt_to_page(__va(pmd_val(pmd)))
/*
* Permanent address of a page. We never have highmem, so this is trivial.
*/
#define pages_to_mb(x) ((x) >> (20 - PAGE_SHIFT))
/*
* Conversion functions: convert a page and protection to a page entry,
* and a page entry and page directory to the page they refer to.

7
arch/arm/include/asm/ptrace.h
View File

@ -54,7 +54,6 @@
#define PSR_C_BIT 0x20000000
#define PSR_Z_BIT 0x40000000
#define PSR_N_BIT 0x80000000
#define PCMASK 0
/*
* Groups of PSR bits
@ -139,11 +138,7 @@ static inline int valid_user_regs(struct pt_regs *regs)
return 0;
}
#define pc_pointer(v) \
((v) & ~PCMASK)
#define instruction_pointer(regs) \
(pc_pointer((regs)->ARM_pc))
#define instruction_pointer(regs) (regs)->ARM_pc
#ifdef CONFIG_SMP
extern unsigned long profile_pc(struct pt_regs *regs);

11
arch/arm/include/asm/setup.h
View File

@ -209,6 +209,17 @@ struct meminfo {
struct membank bank[NR_BANKS];
};
#define for_each_nodebank(iter,mi,no) \
for (iter = 0; iter < mi->nr_banks; iter++) \
if (mi->bank[iter].node == no)
#define bank_pfn_start(bank) __phys_to_pfn((bank)->start)
#define bank_pfn_end(bank) __phys_to_pfn((bank)->start + (bank)->size)
#define bank_pfn_size(bank) ((bank)->size >> PAGE_SHIFT)
#define bank_phys_start(bank) (bank)->start
#define bank_phys_end(bank) ((bank)->start + (bank)->size)
#define bank_phys_size(bank) (bank)->size
/*
* Early command line parameters.
*/

20
arch/arm/include/asm/sparsemem.h
View File

@ -3,8 +3,22 @@
#include <asm/memory.h>
#define MAX_PHYSADDR_BITS 32
#define MAX_PHYSMEM_BITS 32
#define SECTION_SIZE_BITS NODE_MEM_SIZE_BITS
/*
* Two definitions are required for sparsemem:
*
* MAX_PHYSMEM_BITS: The number of physical address bits required
* to address the last byte of memory.
*
* SECTION_SIZE_BITS: The number of physical address bits to cover
* the maximum amount of memory in a section.
*
* Eg, if you have 2 banks of up to 64MB at 0x80000000, 0x84000000,
* then MAX_PHYSMEM_BITS is 32, SECTION_SIZE_BITS is 26.
*
* Define these in your mach/memory.h.
*/
#if !defined(SECTION_SIZE_BITS) || !defined(MAX_PHYSMEM_BITS)
#error Sparsemem is not supported on this platform
#endif
#endif

58
arch/arm/include/asm/system.h
View File

@ -43,11 +43,6 @@
#define CR_XP (1 << 23) /* Extended page tables */
#define CR_VE (1 << 24) /* Vectored interrupts */
#define CPUID_ID 0
#define CPUID_CACHETYPE 1
#define CPUID_TCM 2
#define CPUID_TLBTYPE 3
/*
* This is used to ensure the compiler did actually allocate the register we
* asked it for some inline assembly sequences. Apparently we can't trust
@ -61,36 +56,8 @@
#ifndef __ASSEMBLY__
#include <linux/linkage.h>
#include <linux/stringify.h>
#include <linux/irqflags.h>
#ifdef CONFIG_CPU_CP15
#define read_cpuid(reg) \
({ \
unsigned int __val; \
asm("mrc p15, 0, %0, c0, c0, " __stringify(reg) \
: "=r" (__val) \
: \
: "cc"); \
__val; \
})
#else
extern unsigned int processor_id;
#define read_cpuid(reg) (processor_id)
#endif
/*
* The CPU ID never changes at run time, so we might as well tell the
* compiler that it's constant. Use this function to read the CPU ID
* rather than directly reading processor_id or read_cpuid() directly.
*/
static inline unsigned int read_cpuid_id(void) __attribute_const__;
static inline unsigned int read_cpuid_id(void)
{
return read_cpuid(CPUID_ID);
}
#define __exception __attribute__((section(".exception.text")))
struct thread_info;
@ -131,31 +98,6 @@ extern void cpu_init(void);
void arm_machine_restart(char mode);
extern void (*arm_pm_restart)(char str);
/*
* Intel's XScale3 core supports some v6 features (supersections, L2)
* but advertises itself as v5 as it does not support the v6 ISA. For
* this reason, we need a way to explicitly test for this type of CPU.
*/
#ifndef CONFIG_CPU_XSC3
#define cpu_is_xsc3() 0
#else
static inline int cpu_is_xsc3(void)
{
extern unsigned int processor_id;
if ((processor_id & 0xffffe000) == 0x69056000)
return 1;
return 0;
}
#endif
#if !defined(CONFIG_CPU_XSCALE) && !defined(CONFIG_CPU_XSC3)
#define cpu_is_xscale() 0
#else
#define cpu_is_xscale() 1
#endif
#define UDBG_UNDEFINED (1 << 0)
#define UDBG_SYSCALL (1 << 1)
#define UDBG_BADABORT (1 << 2)

2
arch/arm/include/asm/thread_info.h
View File

@ -98,7 +98,7 @@ static inline struct thread_info *current_thread_info(void)
}
#define thread_saved_pc(tsk) \
((unsigned long)(pc_pointer(task_thread_info(tsk)->cpu_context.pc)))
((unsigned long)(task_thread_info(tsk)->cpu_context.pc))
#define thread_saved_fp(tsk) \
((unsigned long)(task_thread_info(tsk)->cpu_context.fp))

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