With commit 02b4e2756e ("ARM: v7 setup
function should invalidate L1 cache"), the default secondary_startup
function for ARMv7 CPUs does invalidate the L1 cache, which was the sole
reason why BCM63xx had to have its own secondary_startup implementation.
Now that the secondary_startup takes care of this, we can completely
remove that code.
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Our SoC branch usually contains expanded support for new SoCs and
other core platform code. Some highlights from this round:
- sunxi: SMP support for A23 SoC
- socpga: big-endian support
- pxa: conversion to common clock framework
- bcm: SMP support for BCM63138
- imx: support new I.MX7D SoC
- zte: basic support for ZX296702 SoC
Conflicts:
arch/arm/mach-socfpga/core.h
Trivial remove/remove conflict with our cleanup branch.
Resolution: remove both sides
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Merge tag 'armsoc-soc' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
Pull ARM SoC platform support updates from Kevin Hilman:
"Our SoC branch usually contains expanded support for new SoCs and
other core platform code. Some highlights from this round:
- sunxi: SMP support for A23 SoC
- socpga: big-endian support
- pxa: conversion to common clock framework
- bcm: SMP support for BCM63138
- imx: support new I.MX7D SoC
- zte: basic support for ZX296702 SoC"
* tag 'armsoc-soc' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (134 commits)
ARM: zx: Add basic defconfig support for ZX296702
ARM: dts: zx: add an initial zx296702 dts and doc
clk: zx: add clock support to zx296702
dt-bindings: Add #defines for ZTE ZX296702 clocks
ARM: socfpga: fix build error due to secondary_startup
MAINTAINERS: ARM64: EXYNOS: Extend entry for ARM64 DTS
ARM: ep93xx: simone: support for SPI-based MMC/SD cards
MAINTAINERS: update Shawn's email to use kernel.org one
ARM: socfpga: support suspend to ram
ARM: socfpga: add CPU_METHOD_OF_DECLARE for Arria 10
ARM: socfpga: use CPU_METHOD_OF_DECLARE for socfpga_cyclone5
ARM: EXYNOS: register power domain driver from core_initcall
ARM: EXYNOS: use PS_HOLD based poweroff for all supported SoCs
ARM: SAMSUNG: Constify platform_device_id
ARM: EXYNOS: Constify irq_domain_ops
ARM: EXYNOS: add coupled cpuidle support for Exynos3250
ARM: EXYNOS: add exynos_get_boot_addr() helper
ARM: EXYNOS: add exynos_set_boot_addr() helper
ARM: EXYNOS: make exynos_core_restart() less verbose
ARM: EXYNOS: fix exynos_boot_secondary() return value on timeout
...
All ARMv5 and older CPUs invalidate their caches in the early assembly
setup function, prior to enabling the MMU. This is because the L1
cache should not contain any data relevant to the execution of the
kernel at this point; all data should have been flushed out to memory.
This requirement should also be true for ARMv6 and ARMv7 CPUs - indeed,
these typically do not search their caches when caching is disabled (as
it needs to be when the MMU is disabled) so this change should be safe.
ARMv7 allows there to be CPUs which search their caches while caching is
disabled, and it's permitted that the cache is uninitialised at boot;
for these, the architecture reference manual requires that an
implementation specific code sequence is used immediately after reset
to ensure that the cache is placed into a sane state. Such
functionality is definitely outside the remit of the Linux kernel, and
must be done by the SoC's firmware before _any_ CPU gets to the Linux
kernel.
Changing the data cache clean+invalidate to a mere invalidate allows us
to get rid of a lot of platform specific hacks around this issue for
their secondary CPU bringup paths - some of which were buggy.
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Tested-by: Florian Fainelli <f.fainelli@gmail.com>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Tested-by: Dinh Nguyen <dinguyen@opensource.altera.com>
Acked-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
Tested-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
Acked-by: Shawn Guo <shawn.guo@linaro.org>
Tested-by: Thierry Reding <treding@nvidia.com>
Acked-by: Thierry Reding <treding@nvidia.com>
Tested-by: Geert Uytterhoeven <geert+renesas@glider.be>
Tested-by: Michal Simek <michal.simek@xilinx.com>
Tested-by: Wei Xu <xuwei5@hisilicon.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Add support for booting the secondary CPU on BCM63138, this involves:
- locating the bootlut to write the reset vector
- powering up the second CPU when we need to using the DT-supplied PMB
references
- disabling VFP when enabled such that we can keep having SMP
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Pull "Broadcom Cygnus SoC platform support" from Florian Fainelli:
This pull request contains the platform code to support the Broadcom Cygnus SoC
using the iProc architecture:
- add support for the Broadcom Cygnus SoC
- consolidate the BCM5301X Kconfig options under the iProc menuconfig entry
- remove one level of menu in menuconfig
* tag 'arm-soc/for-3.19/cygnus-platform-v2' of http://github.com/brcm/linux:
ARM: mach-bcm: ARCH_BCM_MOBILE: remove one level of menu from Kconfig
ARM: mach-bcm: Consolidate currently supported IPROC SoCs
ARM: cygnus: Initial support for Broadcom Cygnus SoC
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Adds initial support for the Cygnus SoC based on Broadcom’s iProc series.
Reviewed-by: Ray Jui <rjui@broadcom.com>
Reviewed-by: Desmond Liu <desmondl@broadcom.com>
Reviewed-by: JD (Jiandong) Zheng <jdzheng@broadcom.com>
Tested-by: Jonathan Richardson <jonathar@broadcom.com>
Signed-off-by: Scott Branden <sbranden@broadcom.com>
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Support for SMP bringup of the B15 CPUs on Broadcom STB chips was added
in commit 4fbe66d990 but was reverted in
commit fc3e825fa9 to address some late
review comments. This reintroduces SMP support.
Signed-off-by: Marc Carino <marc.ceeeee@gmail.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Merge "ARM: BCM: Broadcom BCM63138 support" from Florian Fainelli:
This patchset adds very minimal support for the BCM63138 SoC which is
a xDSL SoC using a dual Cortex A9 CPU complex.
* tag 'bcm63138-v4' of http://github.com/brcm/linux:
MAINTAINERS: add entry for the Broadcom BCM63xx ARM SoCs
ARM: BCM63XX: add BCM963138DVT Reference platform DTS
ARM: BCM63XX: add BCM63138 minimal Device Tree
ARM: BCM63XX: add low-level UART debug support
ARM: BCM63XX: add basic support for the Broadcom BCM63138 DSL SoC
Conflicts:
arch/arm/Kconfig.debug
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
This patch adds basic support for the Broadcom BCM63138 DSL SoC which is
using a dual-core Cortex A9 system. Add the very minimum required code
boot Linux on this SoC.
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
There were several issues (of varying degree of importance) pointed out
with this code late in the review cycle, yet the code was still merged.
Let's rip it out for now and look at resubmitting at a later time.
This reverts most of commit 4fbe66d990.
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Signed-off-by: Olof Johansson <olof@lixom.net>
The BCM7xxx series of Broadcom SoCs are used primarily in set-top boxes.
This patch adds machine support for the ARM-based Broadcom SoCs.
Signed-off-by: Marc Carino <marc.ceeeee@gmail.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Signed-off-by: Matt Porter <mporter@linaro.org>
This patch adds SMP support for BCM281XX and BCM21664 family SoCs.
This feature is controlled with a distinct config option such that
an SMP-enabled multi-v7 binary can be configured to run these SoCs
in uniprocessor mode. Since this SMP functionality is used for
multiple Broadcom mobile chip families the config option is called
ARCH_BCM_MOBILE_SMP (for lack of a better name).
On SoCs of this type, the secondary core is not held in reset on
power-on. Instead it loops in a ROM-based holding pen. To release
it, one must write into a special register a jump address whose
low-order bits have been replaced with a secondary core's id, then
trigger an event with SEV. On receipt of an event, the ROM code
will examine the register's contents, and if the low-order bits
match its cpu id, it will clear them and write the value back to the
register just prior to jumping to the address specified.
The location of the special register is defined in the device tree
using a "secondary-boot-reg" property in a node whose "enable-method"
matches.
Derived from code originally provided by Ray Jui <rjui@broadcom.com>
Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: Matt Porter <mporter@linaro.org>
These source files contain only level-2 cache initialization code,
so rename them to make that fact more obvious.
Signed-off-by: Alex Elder <elder@linaro.org>
Reviewed-by: Tim Kryger <tim.kryger@linaro.org>
Reviewed-by: Markus Mayer <markus.mayer@linaro.org>
Reviewed-by: Matt Porter <mporter@linaro.org>
Signed-off-by: Matt Porter <mporter@linaro.org>
Move the code that implements the "smc" call into a C function that
uses inline assembly. This allows us to make that function private,
and enables us to get rid of "arch/arm/mach-bcm/bcm_kona_smc_asm.S".
Rename what had been the "buffer_addr" argument to be "buffer_phys"
so it's consistent with other usage in this file.
Since it's now easy to do, verify that r12 contains SEC_EXIT_NORMAL
upon completion of the SMC. There really isn't a good way to handle
the abnormal completion of a secure monitor request.
Since "bcm_kona_smc.h" is now only included from C files, eliminate
the #ifndef __ASSEMBLY__.
Signed-off-by: Alex Elder <elder@linaro.org>
Reviewed-by: Tim Kryger <tim.kryger@linaro.org>
Reviewed-by: Markus Mayer <markus.mayer@linaro.org>
Reviewed-by: Matt Porter <mporter@linaro.org>
Signed-off-by: Matt Porter <mporter@linaro.org>
Add a new config option ARCH_BCM_MOBILE_L2_CACHE that allows support
for level-2 cache to be enabled or disabled at build time for
BCM218XX and BCM21664 family SoCs.
Build support for SMC only if it's required (currently it's only
required for to support level 2 cache control).
If arch/arm/mach-bcm/kona.c gets compiled, ARCH_BCM_MOBILE_L2_CACHE
must have been selected, which implies CONFIG_CACHE_L2X0 is set.
There is therefore no need to check CONFIG_CACHE_L2X0 at the top
of kona_l2_cache_init(), so get rid of that check.
Signed-off-by: Alex Elder <elder@linaro.org>
Reviewed-by: Tim Kryger <tim.kryger@linaro.org>
Reviewed-by: Markus Mayer <markus.mayer@linaro.org>
Reviewed-by: Matt Porter <mporter@linaro.org>
Signed-off-by: Matt Porter <mporter@linaro.org>
Currently CONFIG_ARCH_BCM_MOBILE is used to select all (both)
Broadcom mobile SoC families. Instead, use that only as a config
menu switch, and define specific symbols like ARCH_BCM_281XX to
select a particular SoC family. If ARCH_BCM_MOBILE is selected, all
of the SoCs will be selected by default, but this way each can be
disabled individually as well.
Note that BCM281xx and BCM21664 both require the SMC and L2 cache
control code, so that code will be built based on ARCH_BCM_MOBILE.
Signed-off-by: Alex Elder <elder@linaro.org>
[mporter: added ARM: to the description]
Signed-off-by: Matt Porter <mporter@linaro.org>
Lots of changes specific to one of the SoC families. Some that
stick out are:
* mach-qcom gains new features, most importantly SMP support for
the newer chips (Stephen Boyd, Rohit Vaswani)
* mvebu gains support for three new SoCs: Armada 375, 380 and 385
(Thomas Petazzoni and Free-electrons team)
* SMP support for Rockchips (Heiko Stübner)
* Lots of i.MX changes (Shawn Guo)
* Added support for BCM5301x SoC (Hauke Mehrtens)
* Multiplatform support for Marvell Kirkwood and Dove
(Andrew Lunn and Sebastian Hesselbarth doing the final part
of a long journey)
* Unify davinci platforms and remove obsolete ones (Sekhar Nori,
Arnd Bergmann)
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Merge tag 'soc-3.15' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
Pull ARM SoC specific changes from Arnd Bergmann:
"Lots of changes specific to one of the SoC families. Some that stick
out are:
- mach-qcom gains new features, most importantly SMP support for the
newer chips (Stephen Boyd, Rohit Vaswani)
- mvebu gains support for three new SoCs: Armada 375, 380 and 385
(Thomas Petazzoni and Free-electrons team)
- SMP support for Rockchips (Heiko Stübner)
- Lots of i.MX changes (Shawn Guo)
- Added support for BCM5301x SoC (Hauke Mehrtens)
- Multiplatform support for Marvell Kirkwood and Dove (Andrew Lunn
and Sebastian Hesselbarth doing the final part of a long journey)
- Unify davinci platforms and remove obsolete ones (Sekhar Nori, Arnd
Bergmann)"
* tag 'soc-3.15' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (126 commits)
ARM: sunxi: Select HAVE_ARM_ARCH_TIMER
ARM: cache-tauros2: remove ARMv6 code
ARM: mvebu: don't select CONFIG_NEON
ARM: davinci: fix DT booting with default defconfig
ARM: configs: bcm_defconfig: enable bcm590xx regulator support
ARM: davinci: remove tnetv107x support
MAINTAINERS: Update ARM STi maintainers
ARM: restrict BCM_KONA_UART to ARCH_BCM_MOBILE
ARM: bcm21664: Add board support.
ARM: sunxi: Add the new watchog compatibles to the reboot code
ARM: enable ARM_HAS_SG_CHAIN for multiplatform
ARM: davinci: remove da8xx_omapl_defconfig
ARM: davinci: da8xx: fix multiple watchdog device registration
ARM: davinci: add da8xx specific configs to davinci_all_defconfig
ARM: davinci: enable da8xx build concurrently with older devices
ARM: BCM5301X: workaround suppress fault
ARM: BCM5301X: add early debugging support
ARM: BCM5301X: initial support for the BCM5301X/BCM470X SoCs with ARM CPU
ARM: mach-bcm: Remove GENERIC_TIME
ARM: shmobile: APMU: Fix warnings due to improper printk formats
...
Add support for the Broadcom BCM21664 mobile SoC. It has two Cortex-A9
cores like the BCM281xx family of chips. BCM21664 and BCM281xx share
many IP blocks in addition to the ARM cores.
Signed-off-by: Markus Mayer <markus.mayer@linaro.org>
Signed-off-by: Matt Porter <mporter@linaro.org>
This patch adds support for the BCM5301X/BCM470X SoCs with an ARM CPUs.
Currently just booting to a shell is working and nothing else, no
Ethernet, wifi, flash, ...
I have some pending patches to make Ethernet work for this device.
Mostly device tree support for bcma is missing.
This SoC is used in small office and home router with Broadcom SoCs
it's internal name is Northstar. This code should support the BCM4707,
BCM4708, BCM4709, BCM53010, BCM53011 and BCM53012 SoC. It uses one or
two ARM Cortex A9 Cores, some highlights are 2 PCIe 2.0 controllers,
4 Gigabit Ethernet MACs and a USB 3.0 host controller.
This SoC uses a dual core CPU, but this is currently not implemented.
More information about this SoC can be found here:
http://www.anandtech.com/show/5925/broadcom-announces-bcm4708x-and-bcm5301x-socs-for-80211ac-routers
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Christian Daudt <bcm@fixthebug.org>
Signed-off-by: Matt Porter <mporter@linaro.org>
Move the bcm2835 board file into the mach-bcm directory. This allows us
to get rid of the mach-bcm2835 directory with the associated Kconfig
and Makefile.
Signed-off-by: Markus Mayer <markus.mayer@linaro.org>
[swarren, adjust defconfig so ARCH_BCM2835 still gets enabled]
Signed-off-by: Stephen Warren <swarren@wwwdotorg.org>
Currently ARCH_BCM has been used for Broadcom
Mobile V7 based SoCs. In order to allow other Broadcom
SoCs to also use mach-bcm directory and files, this patch
renames the original ARCH_BCM to ARCH_BCM_MOBILE, and
uses ARCH_BCM to define any Broadcom chip residing
in mach-bcm directory.
Signed-off-by: Christian Daudt <bcm@fixthebug.org>
Acked-by: Olof Johansson <olof@lixom.net>
Changes from v2:
- switch ARCH_MULTIPLATFORM from select to depends
- remove 'default y' from BCM_MOBILE
Changes from v1:
- fix alpha ordering in dts/Makefile
- break into 4 patches for separate subsys
In order to support multiple SoC models in the mach-bcm
directory, board_bcm.c is being renamed board_bcm281xx.c
Reviewed-by: Markus Mayer <markus.mayer@linaro.org>
Signed-off-by: Christian Daudt <csd@broadcom.com>
This patch adds the code needed to trigger a reboot on the bcm281xx
family.
Signed-off-by: Markus Mayer <markus.mayer@linaro.org>
Reviewed-by: Tim Kryger <tim.kryger@linaro.org>
Reviewed-by: Matt Porter <matt.porter@linaro.org>
Reviewed-by: Alex Elder <alex.elder@linaro.org>
Acked-by: Christian Daudt <csd@broadcom.com>
- Adds a module to provide calls into secure monitor mode
- Uses this module to make secure monitor calls to enable L2 cache.
Updates from V1:
- Split DT portion into separate patch
- replace #ifdef-ed L2 code with "if".
- move init call to board init
Signed-off-by: Christian Daudt <csd@broadcom.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
In order to start upstreaming Broadcom SoC support, create
a starting hierarchy, arch and dts files.
The first support SoC family that is planned is the
BCM281XX (BCM11130/11140/11351/28145/28155) family of dual A9 mobile
SoC cores.
This code is just the skeleton code for get the machine upstreamed. It
has been made MULTIPLATFORM compatible.
Next steps
----------
Upstream a basic set of drivers - sufficient for a console boot to
ramdisk. These will includer timer, gpio, i2c drivers.
After this basic set, we will proceed with a more comprehensive set
of drivers for the 281XX SoC family.
v2 patch mods
--------
- Remove l2x0_of_init call as there were problems with the code.
A separate patch will be submitted with cache init code
- Rename capri files and refs to bcm281xx-based names
- Add bcm281xx binding doc
- various misc cleanups
v3 patch mods
-------------
- Remove extra #include lines
- Remove remaining references to capri
- dt uart chipset string added
- cleaned up chip # references
v4 patch mods
-------------
- swap order of compatible definitions for uart
- fix typo
v5 patch mods
-------------
- Rename bcm281xx to bcm11351 in dts+code,
leaving references to bcm281xx only in help+comments.
v6 patch mods
-------------
- fix typo in uart 'compatible' string
Signed-off-by: Christian Daudt <csd@broadcom.com>
Reviewed-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Olof Johansson <olof@lixom.net>
