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d0f13e3c20
linux/include/asm-powerpc
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Benjamin Herrenschmidt d0f13e3c20 [POWERPC] Introduce address space "slices" 
The basic issue is to be able to do what hugetlbfs does but with
different page sizes for some other special filesystems; more
specifically, my need is:

 - Huge pages

 - SPE local store mappings using 64K pages on a 4K base page size
kernel on Cell

 - Some special 4K segments in 64K-page kernels for mapping a dodgy
type of powerpc-specific infiniband hardware that requires 4K MMU
mappings for various reasons I won't explain here.

The main issues are:

 - To maintain/keep track of the page size per "segment" (as we can
only have one page size per segment on powerpc, which are 256MB
divisions of the address space).

 - To make sure special mappings stay within their allotted
"segments" (including MAP_FIXED crap)

 - To make sure everybody else doesn't mmap/brk/grow_stack into a
"segment" that is used for a special mapping

Some of the necessary mechanisms to handle that were present in the
hugetlbfs code, but mostly in ways not suitable for anything else.

The patch relies on some changes to the generic get_unmapped_area()
that just got merged.  It still hijacks hugetlb callbacks here or
there as the generic code hasn't been entirely cleaned up yet but
that shouldn't be a problem.

So what is a slice ?  Well, I re-used the mechanism used formerly by our
hugetlbfs implementation which divides the address space in
"meta-segments" which I called "slices".  The division is done using
256MB slices below 4G, and 1T slices above.  Thus the address space is
divided currently into 16 "low" slices and 16 "high" slices.  (Special
case: high slice 0 is the area between 4G and 1T).

Doing so simplifies significantly the tracking of segments and avoids
having to keep track of all the 256MB segments in the address space.

While I used the "concepts" of hugetlbfs, I mostly re-implemented
everything in a more generic way and "ported" hugetlbfs to it.

Slices can have an associated page size, which is encoded in the mmu
context and used by the SLB miss handler to set the segment sizes.  The
hash code currently doesn't care, it has a specific check for hugepages,
though I might add a mechanism to provide per-slice hash mapping
functions in the future.

The slice code provide a pair of "generic" get_unmapped_area() (bottomup
and topdown) functions that should work with any slice size.  There is
some trickiness here so I would appreciate people to have a look at the
implementation of these and let me know if I got something wrong.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-05-09 16:35:00 +10:00
..
iseries [POWERPC] Refactor 64 bits DMA operations 2006-12-04 20:38:40 +11:00
8253pit.h
a.out.h
abs_addr.h Don't include linux/config.h from anywhere else in include/ 2006-04-26 12:56:16 +01:00
agp.h
asm-compat.h [POWERPC] Use mtocrf instruction in asm when CONFIG_POWER4_ONLY=y 2007-04-13 03:55:13 +10:00
atomic.h atomic.h: atomic_add_unless as inline. Remove system.h atomic.h circular dependency 2007-05-08 11:15:20 -07:00
auxvec.h
backlight.h [PATCH] powermac: More powermac backlight fixes 2006-07-31 13:28:45 -07:00
bitops.h atomic.h: add atomic64 cmpxchg, xchg and add_unless to powerpc 2007-05-08 11:15:19 -07:00
bootx.h
btext.h
bug.h [POWERPC] Fix manual assembly WARN_ON() in enter_rtas(). 2007-01-09 17:03:02 +11:00
bugs.h
byteorder.h
cache.h Don't include linux/config.h from anywhere else in include/ 2006-04-26 12:56:16 +01:00
cacheflush.h [POWERPC] DEBUG_PAGEALLOC for 32-bit 2007-04-13 04:09:39 +10:00
cell-pmu.h [POWERPC] cell: add cbe_node_to_cpu function 2007-04-23 21:44:38 +02:00
checksum.h [NET]: POWERPC checksum annotations and cleanups. 2006-12-02 21:23:20 -08:00
compat.h [PATCH] powerpc signal __user annotations 2006-02-08 01:03:46 -05:00
cputable.h [POWERPC] pasemi: PA6T oprofile support 2007-04-24 21:31:51 +10:00
cputime.h [PATCH] powerpc: implement missing jiffies64_to_cputime64() 2006-07-05 09:39:54 -07:00
current.h [POWERPC] Include stddef.h in asm-powerpc/current.h to get offsetof 2007-03-09 15:03:24 +11:00
dbdma.h [POWERPC] Xserve cpu-meter driver 2006-12-04 20:39:30 +11:00
dcr-mmio.h [POWERPC] Generic DCR infrastructure 2006-12-04 16:08:25 +11:00
dcr-native.h [POWERPC] More DCR native fixups 2007-02-16 14:00:19 +11:00
dcr.h [POWERPC] Compile fixes for arch/powerpc dcr code 2007-02-07 14:03:23 +11:00
delay.h [POWERPC] Fix mdelay badness on shared processor partitions 2006-06-21 15:01:33 +10:00
device.h [POWERPC] Refactor 64 bits DMA operations 2006-12-04 20:38:40 +11:00
div64.h
dma-mapping.h [PATCH] dma-mapping.h stubs fix 2007-01-30 08:39:21 -08:00
dma.h Don't include linux/config.h from anywhere else in include/ 2006-04-26 12:56:16 +01:00
edac.h [POWERPC] EDAC ECC software scrubber 2007-03-09 15:03:25 +11:00
eeh_event.h [POWERPC] EEH: rm un-needed data 2007-03-22 22:52:55 +11:00
eeh.h [POWERPC] Merge 32 and 64 bits asm-powerpc/io.h 2006-12-04 20:39:05 +11:00
elf.h [POWERPC] Move ELF_ET_DYN_BASE up to 512MB point 2007-01-24 21:13:56 +11:00
emergency-restart.h
errno.h
fcntl.h
firmware.h [POWERPC] Only use H_BULK_REMOVE if the firmware supports it 2007-02-08 15:02:35 +11:00
floppy.h [PATCH] ANSIfy powerpc floppy.h 2007-03-14 15:27:50 -07:00
fs_pd.h [POWERPC] Fix kernel build errors for mpc8272ads and mpc8560ads 2007-02-07 14:03:20 +11:00
futex.h [PATCH] mm: pagefault_{disable,enable}() 2006-12-07 08:39:21 -08:00
grackle.h
hardirq.h
heathrow.h
hvcall.h [POWERPC] Avoid hypervisor statistics calculation in real mode 2007-03-22 15:01:43 +11:00
hvconsole.h [PATCH] powerpc: hvc_console updates 2006-03-28 16:45:26 +11:00
hvcserver.h
hw_irq.h [POWERPC] Delete unused irq functions on powerpc 2006-12-08 17:10:18 +11:00
i8259.h [POWERPC] Fix CHRP platforms with only 8259 2006-10-25 13:49:22 +10:00
ibmebus.h [POWERPC] ibmebus: dynamic addition/removal of adapters, some code cleanup 2007-03-16 16:38:19 +11:00
ide.h [POWERPC] Merge 32 and 64 bits asm-powerpc/io.h 2006-12-04 20:39:05 +11:00
immap_86xx.h [POWERPC] 86xx/85xx: Unify Freescale PCI Express memory map registers structure 2007-03-26 17:03:49 -05:00
immap_qe.h [POWERPC] qe: ucc_slow.guemr is in the wrong place 2007-03-29 14:33:56 -05:00
io-defs.h [POWERPC] Merge 32 and 64 bits asm-powerpc/io.h 2006-12-04 20:39:05 +11:00
io.h [POWERPC] Generic check_legacy_ioport 2007-04-27 21:14:30 +10:00
ioctl.h
ioctls.h
iommu.h [POWERPC] DART iommu suspend 2007-05-07 20:31:14 +10:00
ipc.h
ipcbuf.h
ipic.h [POWERPC] 83xx: Return a point to the struct ipic from ipic_init() 2007-01-26 01:45:32 -06:00
irq_regs.h IRQ: Maintain regs pointer globally rather than passing to IRQ handlers 2006-10-05 15:10:12 +01:00
irq.h [POWERPC] Add IRQ remapping hook 2007-01-24 21:13:59 +11:00
irqflags.h [PATCH] lockdep: irqtrace subsystem, core 2006-07-03 15:27:03 -07:00
Kbuild [PATCH] ps3: Virtual Frame Buffer Driver 2007-02-12 09:48:44 -08:00
kdebug.h Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc 2007-05-08 11:50:19 -07:00
kdump.h [POWERPC] kdump: Support kernels having 64k page size. 2006-09-13 18:30:04 +10:00
kexec.h kdump/kexec: calculate note size at compile time 2007-05-08 11:15:07 -07:00
keylargo.h
kmap_types.h
kprobes.h [POWERPC] Minor fault path optimization 2007-05-02 20:57:39 +10:00
libata-portmap.h Fix Maple PATA IRQ assignment. 2007-01-26 17:27:40 -05:00
linkage.h
lmb.h [PATCH] powerpc: Remove calculation of io hole 2006-03-22 15:04:30 +11:00
local.h local_t: powerpc extension 2007-05-08 11:15:20 -07:00
lppaca.h [POWERPC] Update lppaca offset comments 2006-08-08 17:08:58 +10:00
lv1call.h [POWERPC] ps3: add lv1 hvcalls 2006-12-04 20:40:44 +11:00
machdep.h [POWERPC] PowerPC MSI infrastructure 2007-05-08 13:40:31 +10:00
macio.h
mc146818rtc.h
mediabay.h
mman.h [PATCH] add asm-generic/mman.h 2006-02-15 15:32:22 -08:00
mmu_context.h [PATCH] x86: PARAVIRT: add hooks to intercept mm creation and destruction 2007-05-02 19:27:14 +02:00
mmu-44x.h [POWERPC] Early serial debug support for PPC44x 2007-05-08 14:47:33 +10:00
mmu-hash64.h [POWERPC] Introduce address space "slices" 2007-05-09 16:35:00 +10:00
mmu.h [POWERPC] Revise PPC44x MMU code for arch/powerpc 2007-05-02 20:04:29 +10:00
mmzone.h Don't include linux/config.h from anywhere else in include/ 2006-04-26 12:56:16 +01:00
module.h [POWERPC] Generic BUG for powerpc 2006-12-11 16:35:07 +11:00
mpc8xx.h [POWERPC] Add mpc866ads board-specific bits to arch/powerpc 2007-02-07 14:03:17 +11:00
mpc52xx.h [POWERPC] mpc52xx suspend to deep-sleep 2007-05-07 20:31:15 +10:00
mpc85xx.h [PATCH] ppc: Fix io.h for config with CONFIG_PCI not set 2006-11-13 14:49:25 +11:00
mpc86xx.h [POWERPC] Use mpc8641hpcn PIC base address from dev tree. 2006-08-25 14:32:13 +10:00
mpc8260.h [POWERPC] cpm2: CPM2 interrupt controller fix 2007-02-07 14:03:20 +11:00
mpic.h [POWERPC] MPIC MSI allocator 2007-05-08 13:43:48 +10:00
msgbuf.h
mutex.h [PATCH] mutex subsystem, add default include/asm-*/mutex.h files 2006-01-09 15:59:19 -08:00
namei.h
nvram.h
of_device.h [POWERPC] Export of_device_get_modalias 2007-05-07 20:31:15 +10:00
of_platform.h [POWERPC] Souped-up of_platform_device support 2006-12-04 16:08:52 +11:00
ohare.h
oprofile_impl.h [POWERPC] pasemi: PA6T oprofile support 2007-04-24 21:31:51 +10:00
paca.h [POWERPC] Introduce address space "slices" 2007-05-09 16:35:00 +10:00
page_32.h [POWERPC] Kill off the PTE_FMT macro 2007-05-07 20:31:14 +10:00
page_64.h [POWERPC] Introduce address space "slices" 2007-05-09 16:35:00 +10:00
page.h [POWERPC] Remove use of 4level-fixup.h for ppc32 2007-05-08 13:40:31 +10:00
param.h
parport.h parport->dev driver model support 2007-05-08 11:15:05 -07:00
pci-bridge.h [POWERPC] Add a field for each specific bus to struct pci_controller 2007-01-24 21:13:59 +11:00
pci.h [POWERPC] Create and use get_pci_dma_ops() 2007-03-09 15:03:25 +11:00
percpu.h [PATCH] lockdep: add per_cpu_offset() 2006-07-03 15:27:00 -07:00
pgalloc-32.h [POWERPC] Remove use of 4level-fixup.h for ppc32 2007-05-08 13:40:31 +10:00
pgalloc-64.h [POWERPC] Remove arch/powerpc's dependence on asm-ppc/pg{alloc,table}.h 2007-05-02 20:04:30 +10:00
pgalloc.h [POWERPC] Remove arch/powerpc's dependence on asm-ppc/pg{alloc,table}.h 2007-05-02 20:04:30 +10:00
pgtable-4k.h [POWERPC] Remove arch/powerpc's dependence on asm-ppc/pg{alloc,table}.h 2007-05-02 20:04:30 +10:00
pgtable-64k.h [POWERPC] Remove arch/powerpc's dependence on asm-ppc/pg{alloc,table}.h 2007-05-02 20:04:30 +10:00
pgtable-ppc32.h [POWERPC] Remove use of 4level-fixup.h for ppc32 2007-05-08 13:40:31 +10:00
pgtable-ppc64.h [POWERPC] Remove arch/powerpc's dependence on asm-ppc/pg{alloc,table}.h 2007-05-02 20:04:30 +10:00
pgtable.h [POWERPC] Remove arch/powerpc's dependence on asm-ppc/pg{alloc,table}.h 2007-05-02 20:04:30 +10:00
pmac_feature.h [POWERPC] pmac_feature_call checks platform 2007-05-02 16:35:01 +10:00
pmac_low_i2c.h [PATCH] 3/5 powerpc: Add platform functions interpreter 2006-01-09 15:47:18 +11:00
pmac_pfunc.h typo fixes: mecanism -> mechanism 2006-06-30 18:20:44 +02:00
pmc.h [POWERPC] pasemi: PA6T oprofile support 2007-04-24 21:31:51 +10:00
pmi.h [POWERPC] Add PMI driver for cell blade 2007-02-16 14:00:19 +11:00
poll.h [PATCH] POLLRDHUP/EPOLLRDHUP handling for half-closed devices notifications 2006-03-25 08:22:56 -08:00
posix_types.h [PATCH] FD_ZERO build fix 2007-01-11 18:18:22 -08:00
ppc_asm.h [POWERPC] Cell timebase bug workaround 2006-10-25 11:54:18 +10:00
ppc-pci.h [POWERPC] EEH: wait for slot status 2007-03-22 22:52:54 +11:00
processor.h [POWERPC] Remove last_syscall 2007-03-22 22:52:58 +11:00
prom.h [POWERPC] Uninline of_iomap function 2007-05-02 20:04:29 +10:00
ps3.h [POWERPC] PS3: Interrupt routine fixups. 2007-05-02 20:04:31 +10:00
ps3av.h ps3: Make `ps3videomode -v 0 (auto mode) work again 2007-05-04 17:59:08 -07:00
ps3fb.h [PATCH] ps3: cleanup ps3fb before clearing HPTE 2007-02-12 09:48:44 -08:00
pSeries_reconfig.h
ptrace.h [PATCH] Add regs_return_value() helper 2006-10-02 07:57:16 -07:00
qe_ic.h [POWERPC] Add QUICC Engine (QE) infrastructure 2006-10-04 15:24:27 +10:00
qe.h [POWERPC] Add QUICC Engine (QE) infrastructure 2006-10-04 15:24:27 +10:00
reg_8xx.h
reg.h [POWERPC] pasemi: PA6T oprofile support 2007-04-24 21:31:51 +10:00
resource.h
rtas.h [POWERPC] Add rtas_service_present() helper 2006-12-08 17:10:22 +11:00
rtc.h
rwsem.h [PATCH] lockdep: remove RWSEM_DEBUG remnants 2006-07-03 15:27:01 -07:00
scatterlist.h
seccomp.h
sections.h
semaphore.h
sembuf.h
serial.h powerpc: Introduce a new config symbol to control 16550 early debug code 2006-01-10 16:19:05 +11:00
setup.h [PATCH] cleanup asm/setup.h userspace visibility 2006-12-07 08:39:46 -08:00
shmbuf.h
shmparam.h
sigcontext.h
siginfo.h
signal.h [PATCH] irq-flags: POWERPC: Use the new IRQF_ constants 2006-07-02 13:58:47 -07:00
smp.h [POWERPC] Celleb: basic support 2007-02-07 14:03:21 +11:00
smu.h [POWERPC] powermac: Constify & voidify get_property() 2006-07-31 15:55:05 +10:00
socket.h [NET]: Adding SO_TIMESTAMPNS / SCM_TIMESTAMPNS support 2007-04-25 22:24:21 -07:00
sockios.h [NET]: Introduce SIOCGSTAMPNS ioctl to get timestamps with nanosec resolution 2007-04-25 22:24:04 -07:00
sparsemem.h [POWERPC] ps3: add lpar addressing 2006-12-04 20:40:52 +11:00
spinlock_types.h
spinlock.h [PATCH] Directed yield: direct yield of spinlocks for powerpc 2006-10-01 00:39:22 -07:00
spu_csa.h [POWERPC] spufs: make spu page faults not block scheduling 2007-04-23 21:18:55 +02:00
spu_info.h [POWERPC] spufs: Add /lslr, /dma_info and /proxydma files 2006-12-04 20:39:45 +11:00
spu_priv1.h [POWERPC] Celleb: consolidate spu management ops 2007-02-07 14:03:21 +11:00
spu.h [POWERPC] Fix spu SLB invalidations 2007-03-10 00:07:50 +01:00
sstep.h [POWERPC] Added kprobes support to ppc32 2007-02-06 22:55:19 -06:00
stat.h
statfs.h
string.h [STRING]: Move strcasecmp/strncasecmp to lib/string.c 2007-04-26 01:54:39 -07:00
suspend.h [POWERPC] Fix suspend states again 2007-05-02 20:04:30 +10:00
synch.h [PATCH] powerpc: newline for ISYNC_ON_SMP 2006-02-24 14:06:00 +11:00
syscalls.h [PATCH] powerpc: declare arch syscalls in <asm/syscalls.h> 2006-03-27 14:48:22 +11:00
systbl.h allow vmsplice to work in 32-bit mode on ppc64 2007-04-17 16:36:26 -07:00
system.h Remove tas() 2007-05-08 11:15:20 -07:00
tce.h [POWERPC] Use 4kB iommu pages even on 64kB-page systems 2006-11-01 14:52:48 +11:00
termbits.h [PATCH] tty: switch to ktermios 2006-12-08 08:28:57 -08:00
termios.h [PATCH] consolidate line discipline number definitions 2007-02-11 10:51:26 -08:00
thread_info.h [PATCH] PM: Fix SMP races in the freezer 2006-12-13 09:05:49 -08:00
time.h [POWERPC] 8xx: powerpc port of core CPM PIC 2007-02-07 14:03:17 +11:00
timex.h [POWERPC] Cell timebase bug workaround 2006-10-25 11:54:18 +10:00
tlb.h [POWERPC] Make tlb flush batch use lazy MMU mode 2007-04-13 04:09:38 +10:00
tlbflush.h [POWERPC] Cleanup and fix breakage in tlbflush.h 2007-04-24 22:08:56 +10:00
topology.h [PATCH] sched: remove SMT nice 2007-03-05 07:57:51 -08:00
tsi108_irq.h [POWERPC] Update mpc7448hpc2 board irq support using device tree 2006-08-23 15:51:18 +10:00
tsi108_pci.h [POWERPC] Generalize tsi108 PCI setup 2007-05-08 11:54:20 +10:00
tsi108.h [POWERPC] Generalize tsi108 PCI setup 2007-05-08 11:54:20 +10:00
types.h [PATCH] Centralise definitions of sector_t and blkcnt_t 2006-12-04 19:41:15 -08:00
uaccess.h [POWERPC] Add inatomic versions of __get_user and __put_user 2007-04-13 04:09:38 +10:00
ucc_fast.h ucc_geth: Implement Transmit on Demand support 2007-04-28 11:01:04 -04:00
ucc_slow.h [POWERPC] QE: clean up ucc_slow.c and ucc_fast.c 2007-02-17 16:12:54 -06:00
ucc.h [POWERPC] Add QUICC Engine (QE) infrastructure 2006-10-04 15:24:27 +10:00
ucontext.h
udbg.h [POWERPC] Early serial debug support for PPC44x 2007-05-08 14:47:33 +10:00
uic.h [POWERPC] Add arch/powerpc driver for UIC, PPC4xx interrupt controller 2007-04-24 21:32:01 +10:00
unaligned.h
uninorth.h
unistd.h [POWERPC] Wire up sys_epoll_pwait 2007-03-12 15:48:35 +11:00
user.h
vdso_datapage.h [PATCH] powerpc: Kill _machine and hard-coded platform numbers 2006-03-28 23:15:54 +11:00
vdso.h [POWERPC] Fix vDSO page count calculation 2007-02-13 15:35:52 +11:00
vga.h [PATCH] vgacon: make VGA_MAP_MEM take size, remove extra use 2006-06-22 15:05:58 -07:00
vio.h [POWERPC] Refactor 64 bits DMA operations 2006-12-04 20:38:40 +11:00
xmon.h [POWERPC] add support for stopping spus from xmon 2006-10-25 14:20:22 +10:00
xor.h