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ARM: pm: preserve r4 - r11 across a suspend 

Make cpu_suspend()..return function preserve r4 to r11 across a suspend
cycle.  This is in preparation of relieving platform support code from
this task.

Acked-by: Frank Hofmann <frank.hofmann@tomtom.com>
Tested-by: Kevin Hilman <khilman@ti.com>
Acked-by: Jean Pihet <j-pihet@ti.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Russell King 2011-06-13 15:04:14 +01:00
parent 3fd431bd0c
commit 5fa94c812c
1 changed files with 3 additions and 2 deletions
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5
arch/arm/kernel/sleep.S
View File

@ -12,10 +12,11 @@
* r1 = v:p offset * r1 = v:p offset
* r3 = virtual return function * r3 = virtual return function
* Note: sp is decremented to allocate space for CPU state on stack * Note: sp is decremented to allocate space for CPU state on stack
* r0-r3,r9,r10,lr corrupted * r0-r3,ip,lr corrupted
*/ */
ENTRY(cpu_suspend) ENTRY(cpu_suspend)
stmfd sp!, {r3} stmfd sp!, {r3}
stmfd sp!, {r4 - r11}
mov r9, lr mov r9, lr
#ifdef MULTI_CPU #ifdef MULTI_CPU
ldr r10, =processor ldr r10, =processor
@ -88,7 +89,7 @@ ENDPROC(cpu_resume_turn_mmu_on)
cpu_resume_after_mmu: cpu_resume_after_mmu:
str r5, [r2, r4, lsl #2] @ restore old mapping str r5, [r2, r4, lsl #2] @ restore old mapping
mcr p15, 0, r0, c1, c0, 0 @ turn on D-cache mcr p15, 0, r0, c1, c0, 0 @ turn on D-cache
ldmfd sp!, {pc} ldmfd sp!, {r4 - r11, pc}
ENDPROC(cpu_resume_after_mmu) ENDPROC(cpu_resume_after_mmu)
/* /*