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ARM: pm: move return address (for cpu_resume) to top of stack 

Move the return address for cpu_resume to the top of stack so that
cpu_resume looks more like a normal function.

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 13:45:34 +01:00
Родитель 6b5f6ab0e1
Коммит 2fefbcd585
1 изменённых файлов: 8 добавлений и 8 удалений
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16
arch/arm/kernel/sleep.S
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@ -15,6 +15,7 @@
* r0-r3,r9,r10,lr corrupted * r0-r3,r9,r10,lr corrupted
*/ */
ENTRY(cpu_suspend) ENTRY(cpu_suspend)
stmfd sp!, {r3}
mov r9, lr mov r9, lr
#ifdef MULTI_CPU #ifdef MULTI_CPU
ldr r10, =processor ldr r10, =processor
@ -24,7 +25,7 @@ ENTRY(cpu_suspend)
sub sp, sp, r0 @ allocate CPU state on stack sub sp, sp, r0 @ allocate CPU state on stack
mov r0, sp @ save pointer mov r0, sp @ save pointer
add ip, ip, r1 @ convert resume fn to phys add ip, ip, r1 @ convert resume fn to phys
stmfd sp!, {r1, r2, r3, ip} @ save v:p, virt SP, retfn, phys resume fn stmfd sp!, {r1, r2, ip} @ save v:p, virt SP, phys resume fn
ldr r3, =sleep_save_sp ldr r3, =sleep_save_sp
add r2, sp, r1 @ convert SP to phys add r2, sp, r1 @ convert SP to phys
#ifdef CONFIG_SMP #ifdef CONFIG_SMP
@ -44,7 +45,7 @@ ENTRY(cpu_suspend)
sub sp, sp, r0 @ allocate CPU state on stack sub sp, sp, r0 @ allocate CPU state on stack
mov r0, sp @ save pointer mov r0, sp @ save pointer
add ip, ip, r1 @ convert resume fn to phys add ip, ip, r1 @ convert resume fn to phys
stmfd sp!, {r1, r2, r3, ip} @ save v:p, virt SP, retfn, phys resume fn stmfd sp!, {r1, r2, ip} @ save v:p, virt SP, phys resume fn
ldr r3, =sleep_save_sp ldr r3, =sleep_save_sp
add r2, sp, r1 @ convert SP to phys add r2, sp, r1 @ convert SP to phys
#ifdef CONFIG_SMP #ifdef CONFIG_SMP
@ -99,7 +100,7 @@ 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
mov pc, lr ldmfd sp!, {pc}
ENDPROC(cpu_resume_after_mmu) ENDPROC(cpu_resume_after_mmu)
/* /*
@ -122,12 +123,11 @@ ENTRY(cpu_resume)
ldr r0, sleep_save_sp @ stack phys addr ldr r0, sleep_save_sp @ stack phys addr
#endif #endif
setmode PSR_I_BIT | PSR_F_BIT | SVC_MODE, r1 @ set SVC, irqs off setmode PSR_I_BIT | PSR_F_BIT | SVC_MODE, r1 @ set SVC, irqs off
@ load v:p, stack, return fn, resume fn @ load v:p, stack, resume fn
ARM( ldmia r0!, {r1, sp, lr, pc} ) ARM( ldmia r0!, {r1, sp, pc} )
THUMB( ldmia r0!, {r1, r2, r3, r4} ) THUMB( ldmia r0!, {r1, r2, r3} )
THUMB( mov sp, r2 ) THUMB( mov sp, r2 )
THUMB( mov lr, r3 ) THUMB( bx r3 )
THUMB( bx r4 )
ENDPROC(cpu_resume) ENDPROC(cpu_resume)
sleep_save_sp: sleep_save_sp: