Commit Graph

46 Commits

Author SHA1 Message Date
Geert Uytterhoeven 8701d8083d ARM: shmobile: Consolidate SCU mapping code
Currently the SCU registers are mapped in SoC-specific code, using
different methods, all involving the static mapping set up from
machine_desc.map_io():
  - On emev2, a static (non-identity) mapping is used, with ioremap().
    As the static mapping uses the MT_DEVICE type, ioremap() reuses it,
    and the returned virtual address is suitable for passing to
    shmobile_smp_hook(),
  - On sh73a0 and r8a7779, a static identity mapping is used, with the
    legacy IOMEM() macro.
    As the static mapping uses the MT_DEVICE_NONSHARED type, replacing
    IOMEM() by ioremap() would create a new mapping, whose virtual
    address cannot be passed to shmobile_smp_hook().

Move the mapping of the SCU registers from SoC-specific code to common
code, always using ioremap(). To work in the absence of a static
mapping, this requires passing the physical SCU base address to
shmobile_smp_hook().

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
2016-02-17 21:24:29 +09:00
Masahiro Yamada 75305275a7 ARM: use const and __initconst for smp_operations
These smp_operations structures are not over-written, so add "const"
qualifier and replace __initdata with __initconst.

Also, add "static" where it is possible.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Acked-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Acked-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Acked-by: Moritz Fischer <moritz.fischer@ettus.com>
Acked-by: Stephen Boyd <sboyd@codeaurora.org> # qcom part
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Acked-by: Patrice Chotard <patrice.chotard@st.com>
Acked-by: Heiko Stuebner <heiko@sntech.de>
Acked-by: Wei Xu <xuwei5@hisilicon.com>
Acked-by: Florian Fainelli <f.fainelli@gmail.com>
Acked-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
Acked-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
Acked-by: Shawn Guo <shawnguo@kernel.org>
Acked-by: Matthias Brugger <matthias.bgg@gmail.com>
Acked-by: Thierry Reding <treding@nvidia.com>
Acked-by: Nicolas Pitre <nico@linaro.org>
Acked-by: Liviu Dudau <Liviu.Dudau@arm.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2015-12-01 22:17:45 +01:00
Linus Torvalds c706c7eb0d Merge branch 'for-linus' of git://ftp.arm.linux.org.uk/~rmk/linux-arm
Pull ARM development updates from Russell King:
 "Included in this update:

   - moving PSCI code from ARM64/ARM to drivers/

   - removal of some architecture internals from global kernel view

   - addition of software based "privileged no access" support using the
     old domains register to turn off the ability for kernel
     loads/stores to access userspace.  Only the proper accessors will
     be usable.

   - addition of early fixup support for early console

   - re-addition (and reimplementation) of OMAP special interconnect
     barrier

   - removal of finish_arch_switch()

   - only expose cpuX/online in sysfs if hotpluggable

   - a number of code cleanups"

* 'for-linus' of git://ftp.arm.linux.org.uk/~rmk/linux-arm: (41 commits)
  ARM: software-based priviledged-no-access support
  ARM: entry: provide uaccess assembly macro hooks
  ARM: entry: get rid of multiple macro definitions
  ARM: 8421/1: smp: Collapse arch_cpu_idle_dead() into cpu_die()
  ARM: uaccess: provide uaccess_save_and_enable() and uaccess_restore()
  ARM: mm: improve do_ldrd_abort macro
  ARM: entry: ensure that IRQs are enabled when calling syscall_trace_exit()
  ARM: entry: efficiency cleanups
  ARM: entry: get rid of asm_trace_hardirqs_on_cond
  ARM: uaccess: simplify user access assembly
  ARM: domains: remove DOMAIN_TABLE
  ARM: domains: keep vectors in separate domain
  ARM: domains: get rid of manager mode for user domain
  ARM: domains: move initial domain setting value to asm/domains.h
  ARM: domains: provide domain_mask()
  ARM: domains: switch to keeping domain value in register
  ARM: 8419/1: dma-mapping: harmonize definition of DMA_ERROR_CODE
  ARM: 8417/1: refactor bitops functions with BIT_MASK() and BIT_WORD()
  ARM: 8416/1: Feroceon: use of_iomap() to map register base
  ARM: 8415/1: early fixmap support for earlycon
  ...
2015-09-03 16:27:01 -07:00
Stephen Boyd 787047eea2 ARM: 8392/3: smp: Only expose /sys/.../cpuX/online if hotpluggable
Writes to /sys/.../cpuX/online fail if we determine the platform
doesn't support hotplug for that CPU. Furthermore, if the cpu_die
op isn't specified the system hangs when we try to offline a CPU
and it comes right back online unexpectedly. Let's figure this
stuff out before we make the sysfs nodes so that the online file
doesn't even exist if it isn't (at least sometimes) possible to
hotplug the CPU.

Add a new 'cpu_can_disable' op and repoint all 'cpu_disable'
implementations at it because all implementers use the op to
indicate if a CPU can be hotplugged or not in a static fashion.
With PSCI we may need to add a 'cpu_disable' op so that the
secure OS can be migrated off the CPU we're trying to hotplug.
In this case, the 'cpu_can_disable' op will indicate that all
CPUs are hotpluggable by returning true, but the 'cpu_disable' op
will make a PSCI migration call and occasionally fail, denying
the hotplug of a CPU. This shouldn't be any worse than x86 where
we may indicate that all CPUs are hotpluggable but occasionally
we can't offline a CPU due to check_irq_vectors_for_cpu_disable()
failing to find a CPU to move vectors to.

Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Nicolas Pitre <nico@linaro.org>
Cc: Dave Martin <Dave.Martin@arm.com>
Acked-by: Simon Horman <horms@verge.net.au> [shmobile portion]
Tested-by: Simon Horman <horms@verge.net.au>
Cc: Magnus Damm <magnus.damm@gmail.com>
Cc: <linux-sh@vger.kernel.org>
Tested-by: Tyler Baker <tyler.baker@linaro.org>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2015-07-31 18:58:30 +01:00
Geert Uytterhoeven 9a9863987b ARM: shmobile: Remove legacy SoC code for SH-Mobile AG5
The last user of the SH-Mobile AG5 (sh73a0) legacy SoC code was the
KZM-A9-GT legacy board code, which has been removed.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
2015-07-06 09:24:01 +09:00
Magnus Damm 8e8bffffda ARM: shmobile: sh73a0: Add Multiplatform support
Enable sh73a0 Multiplatform support for the generic sh73a0
machine vector. No board support is enabled, and the board
code for KZM9G DT Reference is left by itself.

Signed-off-by: Magnus Damm <damm+renesas@opensource.se>
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
2015-02-24 08:22:45 +09:00
Laurent Pinchart 335204dfb8 ARM: shmobile: Remove FSF address from copyright headers
The information is already included in the COPYING file in the kernel
sources root directory, we don't want to modify all source files when
the FSF will move to a new address, and I'm tired of seeing the related
checkpatch.pl warnings.

Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
2014-10-27 09:48:07 +09:00
Geert Uytterhoeven ded59d6dfc ARM: shmobile: Move sh73a0.h
Change location of sh73a0.h so it can be included as "sh73a0.h"
instead of the old style <mach/sh73a0.h>

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
2014-06-25 16:49:37 +09:00
Magnus Damm fd44aa5e57 ARM: shmobile: Move common.h
Change location for common.h so it can be used as #include "common.h"
instead of the old style #include <mach/common.h>.

Signed-off-by: Magnus Damm <damm+renesas@opensource.se>
Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
2014-06-17 17:09:39 +09:00
Magnus Damm 344bc8b0c8 ARM: shmobile: Let sh73a0 rely on SCU CPU notifier
Now when CPU notifiers are used for SCU boot vector
setup shmobile_smp_scu_boot_secondary() is no longer
needed.

Signed-off-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
2013-09-30 17:56:09 +09:00
Magnus Damm a3b142a1a0 ARM: shmobile: Use shmobile_smp_cpu_disable() on sh73a0
Use shmobile_smp_cpu_disable() on sh73a0 since it
allows CPU Hotplug of any CPU.

Signed-off-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
2013-09-20 17:47:30 -07:00
Olof Johansson 25475030ec Renesas ARM based SoC SMP updates for v3.12
* Per-CPU SMP boot and sleep code on SoCs that use SCU
 * Shared SCU CPU Hotplug code on r8a7779 and sh73a0 SoCs
 * Shared SCU CPU boot code on emev2, r8a7779 and sh73a0 SoCs
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Merge tag 'renesas-smp-for-v3.12' of git://git.kernel.org/pub/scm/linux/kernel/git/horms/renesas into next/renesas

From Simon Horman:
Renesas ARM based SoC SMP updates for v3.12

* Per-CPU SMP boot and sleep code on SoCs that use SCU
* Shared SCU CPU Hotplug code on r8a7779 and sh73a0 SoCs
* Shared SCU CPU boot code on emev2, r8a7779 and sh73a0 SoCs

* tag 'renesas-smp-for-v3.12' of git://git.kernel.org/pub/scm/linux/kernel/git/horms/renesas:
  ARM: shmobile: Per-CPU SMP boot / sleep code for SCU SoCs
  ARM: shmobile: Introduce per-CPU SMP boot / sleep code
  ARM: shmobile: Use shared SCU CPU Hotplug code on r8a7779
  ARM: shmobile: Use shared SCU CPU Hotplug code on sh73a0
  ARM: shmobile: Add shared SCU CPU Hotplug code
  ARM: shmobile: Use shared SCU SMP boot code on emev2
  ARM: shmobile: Use shared SCU SMP boot code on r8a7779
  ARM: shmobile: Use shared SCU SMP boot code on sh73a0
  ARM: shmobile: Introduce shared SCU SMP boot code

Signed-off-by: Olof Johansson <olof@lixom.net>
2013-08-28 10:04:38 -07:00
Olof Johansson e707bb338b Third round of Renesas ARM based SoC cleanups for v3.12
* Remove global GPIO_NR definition from sh73a0 SoC
 * Remove unnecessary nfsroot settings from bootargs of
   kzm9d and armadillo800eva
 * Rename irq initialisation functions of r8a7779 SoC
   to make them consistent with other SoCs
 * Simplify irq initialisation of r8a7740 SoC
 * Add missing __initdata annotations to bockw board, and
   r8a7790 and r8a7779 SoCs
 * Refactor time initialisation and remove shmobile_init_time.
   - This affects the following boards: kzm9g, marzen, ape6evm,
     armadillo800eva and bockw
   - This affects the following SoCs: r8a7790, r8a7779, r7a7740, r7a73a4
 * Cleanup device registration code of r8a7778 SoC
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Merge tag 'renesas-cleanup3-for-v3.12' of git://git.kernel.org/pub/scm/linux/kernel/git/horms/renesas into next/renesas

From Simon Horman:
Third round of Renesas ARM based SoC cleanups for v3.12

* Remove global GPIO_NR definition from sh73a0 SoC
* Remove unnecessary nfsroot settings from bootargs of
  kzm9d and armadillo800eva
* Rename irq initialisation functions of r8a7779 SoC
  to make them consistent with other SoCs
* Simplify irq initialisation of r8a7740 SoC
* Add missing __initdata annotations to bockw board, and
  r8a7790 and r8a7779 SoCs
* Refactor time initialisation and remove shmobile_init_time.
  - This affects the following boards: kzm9g, marzen, ape6evm,
    armadillo800eva and bockw
  - This affects the following SoCs: r8a7790, r8a7779, r7a7740, r7a73a4
* Cleanup device registration code of r8a7778 SoC

* tag 'renesas-cleanup3-for-v3.12' of git://git.kernel.org/pub/scm/linux/kernel/git/horms/renesas: (45 commits)
  ARM: shmobile: sh73a0: Remove global GPIO_NR definition
  ARM: shmobile: kzm9d: remove nfsroot settings from bootargs
  ARM: shmobile: armadillo800eva: remove nfsroot settings from bootargs
  ARM: shmobile: r8a7779: move r8a7779_init_irq_xxx() to setup
  ARM: shmobile: r8a7740: move r8a7740_init_irq_of() to setup
  ARM: shmobile: bockw: add missing __initdata
  ARM: shmobile: r8a7790: add missing __initdata
  ARM: shmobile: r8a7779: add missing __initdata
  ARM: shmobile: Remove unused shmobile_init_time()
  ARM: shmobile: Use clocksource_of_init() on r8a7790
  ARM: shmobile: Use default ->init_time() on KZM9G DT ref
  ARM: shmobile: Use default ->init_time() on Marzen DT ref
  ARM: shmobile: Use default ->init_time() on APE6EVM DT ref
  ARM: shmobile: Use default ->init_time() on APE6EVM
  ARM: shmobile: Use default ->init_time() on Armadillo DT ref
  ARM: shmobile: Use default ->init_time() on Bockw DT ref
  ARM: shmobile: Use default ->init_time() on Bockw
  ARM: shmobile: Use default ->init_time() on r8a7779
  ARM: shmobile: Use default ->init_time() on r8a7778
  ARM: shmobile: Use default ->init_time() on r8a7740
  ...

Signed-off-by: Olof Johansson <olof@lixom.net>
2013-08-28 10:00:24 -07:00
Magnus Damm 352e57a3af ARM: shmobile: Use shared SCU CPU Hotplug code on sh73a0
Update the sh73a0 specific CPU Hotplug code to make use of
the recently introduced shared SCU functions. The sh73a0
power control hardware relies on SCU_PM_POWEROFF with WFI
so the shared SCU code will as-is power down the hardware
as expected.

Signed-off-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
2013-08-06 18:07:25 +09:00
Magnus Damm 12eb847438 ARM: shmobile: Use shared SCU SMP boot code on sh73a0
Use shared SCU code on sh73a0 for SMP boot.

Signed-off-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
2013-08-06 18:07:24 +09:00
Magnus Damm 5489cde560 ARM: shmobile: sh73a0: Rely on DT for SMP CPU info
Remove sh73a0 specific ->smp_init_cpus() callback and
instead of relying on shmobile_smp_init_cpus() simply
use DT for CPU core information.

This assumes that DT_MACHINE_START is used which is
the case when AG5EVM and Kota2 are removed.

Signed-off-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
2013-07-26 09:19:54 +09:00
Paul Gortmaker 8bd26e3a7e arm: delete __cpuinit/__CPUINIT usage from all ARM users
The __cpuinit type of throwaway sections might have made sense
some time ago when RAM was more constrained, but now the savings
do not offset the cost and complications.  For example, the fix in
commit 5e427ec2d0 ("x86: Fix bit corruption at CPU resume time")
is a good example of the nasty type of bugs that can be created
with improper use of the various __init prefixes.

After a discussion on LKML[1] it was decided that cpuinit should go
the way of devinit and be phased out.  Once all the users are gone,
we can then finally remove the macros themselves from linux/init.h.

Note that some harmless section mismatch warnings may result, since
notify_cpu_starting() and cpu_up() are arch independent (kernel/cpu.c)
and are flagged as __cpuinit  -- so if we remove the __cpuinit from
the arch specific callers, we will also get section mismatch warnings.
As an intermediate step, we intend to turn the linux/init.h cpuinit
related content into no-ops as early as possible, since that will get
rid of these warnings.  In any case, they are temporary and harmless.

This removes all the ARM uses of the __cpuinit macros from C code,
and all __CPUINIT from assembly code.  It also had two ".previous"
section statements that were paired off against __CPUINIT
(aka .section ".cpuinit.text") that also get removed here.

[1] https://lkml.org/lkml/2013/5/20/589

Cc: Russell King <linux@arm.linux.org.uk>
Cc: Will Deacon <will.deacon@arm.com>
Cc: linux-arm-kernel@lists.infradead.org
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
2013-07-14 19:36:52 -04:00
Magnus Damm abfa04eb12 ARM: shmobile: sh73a0 SMP with SCU boot fn and args
Let sh73a0 make use of shmobile_boot_fn and shmobile_boot_arg
together with shmobile_boot_scu and the SCU base address.

Signed-off-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
2013-06-17 16:07:28 +09:00
Linus Torvalds 8546dc1d4b Merge branch 'for-linus' of git://git.linaro.org/people/rmk/linux-arm
Pull ARM updates from Russell King:
 "The major items included in here are:

   - MCPM, multi-cluster power management, part of the infrastructure
     required for ARMs big.LITTLE support.

   - A rework of the ARM KVM code to allow re-use by ARM64.

   - Error handling cleanups of the IS_ERR_OR_NULL() madness and fixes
     of that stuff for arch/arm

   - Preparatory patches for Cortex-M3 support from Uwe Kleine-König.

  There is also a set of three patches in here from Hugh/Catalin to
  address freeing of inappropriate page tables on LPAE.  You already
  have these from akpm, but they were already part of my tree at the
  time he sent them, so unfortunately they'll end up with duplicate
  commits"

* 'for-linus' of git://git.linaro.org/people/rmk/linux-arm: (77 commits)
  ARM: EXYNOS: remove unnecessary use of IS_ERR_VALUE()
  ARM: IMX: remove unnecessary use of IS_ERR_VALUE()
  ARM: OMAP: use consistent error checking
  ARM: cleanup: OMAP hwmod error checking
  ARM: 7709/1: mcpm: Add explicit AFLAGS to support v6/v7 multiplatform kernels
  ARM: 7700/2: Make cpu_init() notrace
  ARM: 7702/1: Set the page table freeing ceiling to TASK_SIZE
  ARM: 7701/1: mm: Allow arch code to control the user page table ceiling
  ARM: 7703/1: Disable preemption in broadcast_tlb*_a15_erratum()
  ARM: mcpm: provide an interface to set the SMP ops at run time
  ARM: mcpm: generic SMP secondary bringup and hotplug support
  ARM: mcpm_head.S: vlock-based first man election
  ARM: mcpm: Add baremetal voting mutexes
  ARM: mcpm: introduce helpers for platform coherency exit/setup
  ARM: mcpm: introduce the CPU/cluster power API
  ARM: multi-cluster PM: secondary kernel entry code
  ARM: cacheflush: add synchronization helpers for mixed cache state accesses
  ARM: cpu hotplug: remove majority of cache flushing from platforms
  ARM: smp: flush L1 cache in cpu_die()
  ARM: tegra: remove tegra specific cpu_disable()
  ...
2013-05-03 09:13:19 -07:00
Olof Johansson e0d20b69d3 Merge branch 'gic/cleanup' into next/soc
Merge in the gic cleanup since it has a handful of annoying internal conflicts
with soc development branches. All of them are delete/delete conflicts.

* gic/cleanup:
  irqchip: vic: add include of linux/irq.h
  irqchip: gic: Perform the gic_secondary_init() call via CPU notifier
  irqchip: gic: Call handle_bad_irq() directly
  arm: Move chained_irq_(enter|exit) to a generic file
  arm: Move the set_handle_irq and handle_arch_irq declarations to asm/irq.h

Signed-off-by: Olof Johansson <olof@lixom.net>

Conflicts:
	arch/arm/mach-shmobile/smp-emev2.c
	arch/arm/mach-shmobile/smp-r8a7779.c
	arch/arm/mach-shmobile/smp-sh73a0.c
	arch/arm/mach-socfpga/platsmp.c
2013-04-28 15:06:56 -07:00
Russell King bca7a5a049 ARM: cpu hotplug: remove majority of cache flushing from platforms
Remove the majority of cache flushing calls from the individual platform
files.  This is now handled by the core code.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2013-04-18 20:08:04 +01:00
Catalin Marinas c0114709ed irqchip: gic: Perform the gic_secondary_init() call via CPU notifier
All the calls to gic_secondary_init() pass 0 as the first argument.
Since this function is called on each CPU when starting, it can be done
in a platform-independent way via a CPU notifier registered by the GIC
code.

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Acked-by: Stephen Warren <swarren@nvidia.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Acked-by: Rob Herring <rob.herring@calxeda.com>
Acked-by: Simon Horman <horms+renesas@verge.net.au>
Tested-by: Simon Horman <horms+renesas@verge.net.au>
Acked-by: Srinidhi Kasagar <srinidhi.kasagar@stericsson.com>
Tested-by: Dinh Nguyen <dinguyen@altera.com>
Acked-by: Nicolas Pitre <nico@linaro.org>
Tested-by: Marc Zyngier <marc.zyngier@arm.com>
Cc: Russell King <linux@arm.linux.org.uk>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Kukjin Kim <kgene.kim@samsung.com>
Cc: Sascha Hauer <kernel@pengutronix.de>
Cc: David Brown <davidb@codeaurora.org>
Cc: Bryan Huntsman <bryanh@codeaurora.org>
Cc: Tony Lindgren <tony@atomide.com>
Cc: Magnus Damm <magnus.damm@gmail.com>
Cc: Shiraz Hashim <shiraz.hashim@st.com>
Cc: Linus Walleij <linus.walleij@linaro.org>
Cc: Will Deacon <will.deacon@arm.com>
Cc: Kukjin Kim <kgene.kim@samsung.com>
Cc: Barry Song <baohua.song@csr.com>
2013-03-26 16:12:02 +00:00
Magnus Damm eebadd6764 ARM: shmobile: Use sh73a0-specific cpu disable code
Convert the sh73a0 CPU Hotplug code to use a local
implementation of ->cpu_disable(). With this change
in place the sh73a0 SMP code does no longer depend
on hotplug.c.

Signed-off-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
2013-03-13 02:13:21 +09:00
Magnus Damm 76853504c3 ARM: shmobile: Rework SH73A0_SCU_BASE IOMEM() usage
Rework the IOMEM() usage for the SCU base address in the
case of sh73a0. Removes recently introduced build warnings:

arch/arm/mach-shmobile/smp-sh73a0.c:45:15: warning: initialization makes integer from pointer without a cast [enabled by default]
arch/arm/mach-shmobile/smp-sh73a0.c:45:15: warning: (near initialization for 'twd_local_timer.res[0].start') [enabled by default]
arch/arm/mach-shmobile/smp-sh73a0.c:45:15: warning: initialization makes integer from pointer without a cast [enabled by default]
/arch/arm/mach-shmobile/smp-sh73a0.c:45:15: warning: (near initialization for 'twd_local_timer.res[0].end') [enabled by default]

Reported-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
2013-03-13 02:13:20 +09:00
Magnus Damm 4c8228455d ARM: shmobile: Common shmobile_scu_base in headsmp-scu.S
Update the code in headsmp-scu.S to use a global
shmobile_scu_base variable both for convenient SCU
base address storage and for the early SCU setup
code in shmobile_secondary_vector_scu.

With this patch applied r8a7779, sh73a0 and EMEV2
all make use of the global shmobile_scu_base
variable. However only sh73a0 makes use of the SCU
bring up code in shmobile_secondary_vector_scu.

Signed-off-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
2013-03-13 02:13:19 +09:00
Magnus Damm ec0d84a8d5 ARM: shmobile: Move headsmp-sh73a0.S to headsmp-scu.S
Rename headsmp-sh73a0.S into headsmp-scu.S and
introduce shmobile_secondary_vector_scu().

The goal is to be able to share the function
above between all mach-shmobile SoCs that use
SCU for SMP. So far only sh73a0 use this.

At this time the SCU base address is still hard
coded in headsmp-scu.S to 0xf0000000, but this
will be changed in the future.

Signed-off-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
2013-03-13 02:13:19 +09:00
Magnus Damm aa8d3bb177 ARM: shmobile: Kill off sh73a0 scu_base_addr() function
Replace scu_base_addr() with a static shmobile_scu_base
variable and introduce SH73A0_SCU_BASE.

Later in the series the shmobile_scu_base variable will be
made into a global variable so this is preparation only.

Signed-off-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
2013-03-13 02:13:19 +09:00
Magnus Damm f313ae4e98 ARM: shmobile: Remove sh73a0_get_core_count()
Reduce the number of lines of code in smp-sh73a0.c
by getting rid of the sh73a0_get_core_count() function.

Signed-off-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
2013-03-13 02:13:18 +09:00
Ulrich Hecht dc784e73b4 ARM: mach-shmobile: sh73a0: allow unplugging of CPU0
sh73a0 deals fine with disabling any core, so we should permit it.

Signed-off-by: Ulrich Hecht <ulrich.hecht@gmail.com>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
2013-01-30 13:07:59 +09:00
Bastian Hecht 20aa11358d ARM: SH-Mobile: sh73a0: Add CPU Hotplug
Add the capability to add and remove CPUs on the fly.
The Cortex-A9 offers the possibility to take single cores out of the
MP Core. We add this capabilty taking care that caches are kept
coherent. For verifying the shutdown we rely on the internal SH73A0
Power Status Register PSTR.

Signed-off-by: Bastian Hecht <hechtb+renesas@gmail.com>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
2013-01-25 12:43:48 +09:00
Bastian Hecht 33419a69a5 ARM: SH-Mobile: sh73a0: Secondary CPUs handle own SCU flags
When booting secondary CPUs we have used the main CPU to set up the
Snoop Control Unit flags of these CPUs. It is a cleaner approach
if every CPU takes care of its own flags. We avoid the need for
locking and the program logic is more concise. With this patch the file
headsmp-sh73a0.S is added that contains a startup vector for secondary CPUs
that sets up its own SCU flags.
Further in sh73a0_smp_prepare_cpus() we can rely on the generic ARM helper
scu_power_mode(). This is possible as we don't cross borders anymore (every
CPU handles its own flags) and need no locking. So we can throw out the
needless function modify_scu_cpu_psr().

Signed-off-by: Bastian Hecht <hechtb+renesas@gmail.com>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
2013-01-25 12:43:47 +09:00
Rob Herring 520f7bd733 irqchip: Move ARM gic.h to include/linux/irqchip/arm-gic.h
Now that we have GIC moved to drivers/irqchip and all GIC DT init for
platforms using irqchip_init, move gic.h and update the remaining
includes.

Signed-off-by: Rob Herring <rob.herring@calxeda.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Russell King <linux@arm.linux.org.uk>
Cc: Anton Vorontsov <avorontsov@mvista.com>
Cc: Kukjin Kim <kgene.kim@samsung.com>
Cc: Sascha Hauer <kernel@pengutronix.de>
Cc: David Brown <davidb@codeaurora.org>
Cc: Daniel Walker <dwalker@fifo99.com>
Cc: Bryan Huntsman <bryanh@codeaurora.org>
Cc: Tony Lindgren <tony@atomide.com>
Cc: Paul Mundt <lethal@linux-sh.org>
Cc: Magnus Damm <magnus.damm@gmail.com>
Cc: Viresh Kumar <viresh.linux@gmail.com>
Cc: Shiraz Hashim <shiraz.hashim@st.com>
Cc: Stephen Warren <swarren@wwwdotorg.org>
Cc: Srinidhi Kasagar <srinidhi.kasagar@stericsson.com>
Cc: Linus Walleij <linus.walleij@linaro.org>
Cc: Samuel Ortiz <sameo@linux.intel.com>
2013-01-12 10:47:32 -06:00
Simon Horman d5bea23c82 Revert "ARM: shmobile: sh73a0: Replace modify_scu_cpu_psr with scu_power_mode"
This reverts commit e721295185.

The code changes the flags of the wrong cpus - which breaks the whole
bootup of secondary CPUs.

Cc: Bastian Hecht <hechtb@gmail.com>
Signed-off-by: Simon Horman <horms@verge.net.au>
2012-11-13 11:42:28 +09:00
Bastian Hecht e721295185 ARM: shmobile: sh73a0: Replace modify_scu_cpu_psr with scu_power_mode
We can remove the extra code of modify_scu_cpu_psr() and use the cleaner
generic ARM helper scu_power_mode(). As every CPU only deals with its
own power register and scu_power_mode() operates with 8-bit accesses,
we save the locking overhead too.

Signed-off-by: Bastian Hecht <hechtb@gmail.com>
Signed-off-by: Simon Horman <horms@verge.net.au>
2012-11-06 13:47:21 +09:00
Marc Zyngier a62580e580 ARM: SoC: convert shmobile SMP to SMP operations
Convert shmobile SMP platforms to use struct smp_operations to provide
their SMP and CPU hotplug operations.

Cc: Paul Mundt <lethal@linux-sh.org>
Cc: Magnus Damm <magnus.damm@gmail.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Acked-by: Nicolas Pitre <nico@linaro.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2012-09-14 11:14:58 +02:00
Kuninori Morimoto d6720003c3 ARM / mach-shmobile: sh73a0 SMP TWD boot regression fix
Fix SMP TWD boot regression on sh73a0 based platforms caused by:

4200b16 ARM: shmobile: convert to twd_local_timer_register() interface

After the merge of the above commit it has been impossible to boot
sh73a0 based SoCs with SMP enabled and CONFIG_HAVE_ARM_TWD=y. The
kernel crashes at smp_init_cpus() timing which is before the console
has been initialized, so to the user this looks like a kernel lock up
without any particular error message.

This patch fixes the regression on sh73a0 by moving the TWD
registration code from smp_init_cpus() to sys_timer->init() time.

This patch removed shmobile_twd_init() which is no longer needed

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
2012-05-12 22:13:45 +02:00
Linus Torvalds 820d41cf0c ARM: cleanups of io includes
Rob Herring has done a sweeping change cleaning up all of the mach/io.h includes,
 moving some of the oft-repeated macros to a common location and removing a bunch of
 boiler plate. This is another step closer to a common zImage for multiple platforms.
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Merge tag 'cleanup2' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc

Pull "ARM: cleanups of io includes" from Olof Johansson:
 "Rob Herring has done a sweeping change cleaning up all of the
  mach/io.h includes, moving some of the oft-repeated macros to a common
  location and removing a bunch of boiler plate.  This is another step
  closer to a common zImage for multiple platforms."

Fix up various fairly trivial conflicts (<mach/io.h> removal vs changes
around it, tegra localtimer.o is *still* gone, yadda-yadda).

* tag 'cleanup2' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (29 commits)
  ARM: tegra: Include assembler.h in sleep.S to fix build break
  ARM: pxa: use common IOMEM definition
  ARM: dma-mapping: convert ARCH_HAS_DMA_SET_COHERENT_MASK to kconfig symbol
  ARM: __io abuse cleanup
  ARM: create a common IOMEM definition
  ARM: iop13xx: fix missing declaration of iop13xx_init_early
  ARM: fix ioremap/iounmap for !CONFIG_MMU
  ARM: kill off __mem_pci
  ARM: remove bunch of now unused mach/io.h files
  ARM: make mach/io.h include optional
  ARM: clps711x: remove unneeded include of mach/io.h
  ARM: dove: add explicit include of dove.h to addr-map.c
  ARM: at91: add explicit include of hardware.h to uncompressor
  ARM: ep93xx: clean-up mach/io.h
  ARM: tegra: clean-up mach/io.h
  ARM: orion5x: clean-up mach/io.h
  ARM: davinci: remove unneeded mach/io.h include
  [media] davinci: remove includes of mach/io.h
  ARM: OMAP: Remove remaining includes for mach/io.h
  ARM: msm: clean-up mach/io.h
  ...
2012-03-29 18:02:10 -07:00
Arnd Bergmann b2f1df8d2f Merge branch 'renesas/timer' into next/timer
Conflicts:
	arch/arm/mach-shmobile/timer.c

This resolves a nonobvious merge conflict between renesas
timer changes in the global timer changes with those
from the renesas soc branch and last minute bug fixes that
went into v3.3.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2012-03-20 09:41:43 +00:00
Rob Herring a2a47ca366 ARM: __io abuse cleanup
Several platforms incorrectly use __io() for casting to 'void __iomem *'.
This converts all of those uses to use the common IOMEM macro.

Reported-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Rob Herring <rob.herring@calxeda.com>
Acked-by: Anton Vorontsov <cbouatmailru@gmail.com>
Cc: Russell King <linux@arm.linux.org.uk>
Cc: Paul Mundt <lethal@linux-sh.org>
Cc: Magnus Damm <magnus.damm@gmail.com>
Cc: Srinidhi Kasagar <srinidhi.kasagar@stericsson.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Cc: linux-sh@vger.kernel.org
Acked-by: Arnd Bergmann <arnd@arndb.de>
2012-03-13 21:25:21 -05:00
Marc Zyngier 4200b16d58 ARM: shmobile: convert to twd_local_timer_register() interface
Add support for the new smp_twd runtime registration interface
to the shmobile platforms, and remove the old compile-time support.

Cc: Magnus Damm <magnus.damm@gmail.com>
Cc: Paul Mundt <lethal@linux-sh.org>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
2012-03-13 13:30:31 +00:00
Magnus Damm 689189fb01 ARM: mach-shmobile: sh73a0 PSTR 32-bit access fix
Convert the sh73a0 SMP code to use 32-bit PSTR access.

This fixes wakeup from deep sleep for sh73a0 secondary CPUs.

Signed-off-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2012-02-24 13:24:58 +09:00
Will Deacon eb50439b92 ARM: 7293/1: logical_cpu_map: decouple CPU mapping from SMP
It turns out that the logical CPU mapping is useful even when !CONFIG_SMP
for manipulation of devices like interrupt and power controllers when
running a UP kernel on a CPU other than 0. This can happen when kexecing
a UP image from an SMP kernel.

In the future, multi-cluster systems running AMP configurations will
require something similar for mapping cluster IDs, so it makes sense to
decouple this logic in preparation for this support.

Acked-by: Yang Bai <hamo.by@gmail.com>
Acked-by: Marc Zyngier <marc.zyngier@arm.com>
Reported-by: Joerg Roedel <joerg.roedel@amd.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2012-01-23 10:20:05 +00:00
Will Deacon f80ca52cab ARM: shmobile: convert logical CPU numbers to physical numbers
This patch uses the new cpu_logical_map() macro for converting logical
CPU numbers into physical numbers when dealing with the SCU in the SMP
boot path for sh73a0.

Cc: Magnus Damm <magnus.damm@gmail.com>
Cc: Paul Mundt <lethal@linux-sh.org>
Signed-off-by: Will Deacon <will.deacon@arm.com>
2011-10-17 10:01:11 +01:00
Magnus Damm 60116a7378 ARM: mach-shmobile: sh73a0 twd_base fix
Fix the case of too late twd_base initialization for SMP
on sh73a0 which bas been broken because sh73a0 specific
smp_prepare_cpu() and percpu_timer_setup() changed order
in the commits:

05c74a6cbc
c413521eb4

Without this fix the sh73a0 SMP kernel panics on boot.

Signed-off-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2011-05-24 12:31:17 +09:00
Paul Mundt c0312b33da ARM: mach-shmobile: update for GIC changes.
This fixes up the SMP support to use the refactored GIC APIs.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2011-01-07 12:02:11 +09:00
Magnus Damm 72f4d57923 ARM: mach-shmobile: sh73a0 SMP support
Add SMP support for ag5evm and the sh73a0 processor.

Onlining and offlining works well, but at this point
offlined processor cores are not put into sleep mode.

There is no spinlock for syncing the secondary core
with the first one in this implementation. The code
instead relies on the cpu_online() check in __cpu_up().

Signed-off-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2010-12-14 18:15:47 +09:00