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| author |   Olof Johansson <olof@lixom.net> | 2013-02-11 19:37:51 -0800 |
|---|---|---|
| committer | Olof Johansson <olof@lixom.net> | 2013-02-11 19:37:51 -0800 |
| commit | 1c75c4210009d5cceced76af316c51f9e56ce630 (patch) | |
| tree | cfa3600b25fe8ca385ddc6a2cd230da876312dcb /arch/arm/mach-shmobile | |
| parent | Merge tag 'mxs-soc-3.9' of git://git.linaro.org/people/shawnguo/linux-2.6 into next/soc (diff) | |
| parent | arm: socfpga: Add SMP support for actual socfpga harware (diff) | |
| download | linux-dev-1c75c4210009d5cceced76af316c51f9e56ce630.tar.xz linux-dev-1c75c4210009d5cceced76af316c51f9e56ce630.zip | |
Merge branch 'socfpga/hw' into next/soc
From Dinh Nguyen, this is a series of patches introducing support for
socfpga hardware (Altera Cyclone5). It also includes a cleanup that
moves some of the ARMv7 cache maintenance functions to a common location,
since three other platforms aready implemented it separately.
* socfpga/hw:
arm: socfpga: Add SMP support for actual socfpga harware
arm: Add v7_invalidate_l1 to cache-v7.S
arm: socfpga: Add entries to enable make dtbs socfpga
arm: socfpga: Add new device tree source for actual socfpga HW
Trivial conflict in arch/arm/mach-tegra/headsmp.S.
Signed-off-by: Olof Johansson <olof@lixom.net>
Diffstat (limited to 'arch/arm/mach-shmobile')
| -rw-r--r-- | arch/arm/mach-shmobile/headsmp.S | 48 |
1 files changed, 0 insertions, 48 deletions
diff --git a/arch/arm/mach-shmobile/headsmp.S b/arch/arm/mach-shmobile/headsmp.S index b202c1272526..96001fd49b6c 100644 --- a/arch/arm/mach-shmobile/headsmp.S +++ b/arch/arm/mach-shmobile/headsmp.S @@ -16,54 +16,6 @@ __CPUINIT -/* Cache invalidation nicked from arch/arm/mach-imx/head-v7.S, thanks! - * - * The secondary kernel init calls v7_flush_dcache_all before it enables - * the L1; however, the L1 comes out of reset in an undefined state, so - * the clean + invalidate performed by v7_flush_dcache_all causes a bunch - * of cache lines with uninitialized data and uninitialized tags to get - * written out to memory, which does really unpleasant things to the main - * processor. We fix this by performing an invalidate, rather than a - * clean + invalidate, before jumping into the kernel. - * - * This funciton is cloned from arch/arm/mach-tegra/headsmp.S, and needs - * to be called for both secondary cores startup and primary core resume - * procedures. Ideally, it should be moved into arch/arm/mm/cache-v7.S. - */ -ENTRY(v7_invalidate_l1) - mov r0, #0 - mcr p15, 0, r0, c7, c5, 0 @ invalidate I cache - mcr p15, 2, r0, c0, c0, 0 - mrc p15, 1, r0, c0, c0, 0 - - ldr r1, =0x7fff - and r2, r1, r0, lsr #13 - - ldr r1, =0x3ff - - and r3, r1, r0, lsr #3 @ NumWays - 1 - add r2, r2, #1 @ NumSets - - and r0, r0, #0x7 - add r0, r0, #4 @ SetShift - - clz r1, r3 @ WayShift - add r4, r3, #1 @ NumWays -1: sub r2, r2, #1 @ NumSets-- - mov r3, r4 @ Temp = NumWays -2: subs r3, r3, #1 @ Temp-- - mov r5, r3, lsl r1 - mov r6, r2, lsl r0 - orr r5, r5, r6 @ Reg = (Temp<<WayShift)|(NumSets<<SetShift) - mcr p15, 0, r5, c7, c6, 2 - bgt 2b - cmp r2, #0 - bgt 1b - dsb - isb - mov pc, lr -ENDPROC(v7_invalidate_l1) - ENTRY(shmobile_invalidate_start) bl v7_invalidate_l1 b secondary_startup |