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| author | Russell King <rmk+kernel@arm.linux.org.uk> | 2011-06-13 16:28:40 +0200 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2011-06-24 09:47:36 +0200 |
| commit | 3799bbe57843d279008c9ec3406838966cad5f15 (patch) | |
| tree | 791781918bd18ac0747eb0b82d8eb5e2205af105 /arch/arm/kernel/sleep.S | |
| parent | ARM: pm: reallocate registers to avoid r2, r3 (diff) | |
| download | linux-3799bbe57843d279008c9ec3406838966cad5f15.tar.xz linux-3799bbe57843d279008c9ec3406838966cad5f15.zip | |
ARM: pm: rejig suspend follow-on function calling convention
Save the suspend function pointer onto the stack for use when returning.
Allocate r2 to pass an argument to the suspend 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>
Diffstat (limited to 'arch/arm/kernel/sleep.S')
| -rw-r--r-- | arch/arm/kernel/sleep.S | 9 |
1 files changed, 5 insertions, 4 deletions
diff --git a/arch/arm/kernel/sleep.S b/arch/arm/kernel/sleep.S index 358be13499da..b924bcc32dcd 100644 --- a/arch/arm/kernel/sleep.S +++ b/arch/arm/kernel/sleep.S @@ -10,6 +10,7 @@ /* * Save CPU state for a suspend * r1 = v:p offset + * r2 = suspend function arg0 * r3 = virtual return function * Note: sp is decremented to allocate space for CPU state on stack * r0-r3,ip,lr corrupted @@ -17,7 +18,6 @@ ENTRY(cpu_suspend) stmfd sp!, {r3} stmfd sp!, {r4 - r11} - mov r9, lr #ifdef MULTI_CPU ldr r10, =processor ldr r5, [r10, #CPU_SLEEP_SIZE] @ size of CPU sleep state @@ -33,6 +33,7 @@ ENTRY(cpu_suspend) stmfd sp!, {r1, r6, ip} @ save v:p, virt SP, phys resume fn ldr r5, =sleep_save_sp add r6, sp, r1 @ convert SP to phys + stmfd sp!, {r2, lr} @ save suspend func arg and pointer #ifdef CONFIG_SMP ALT_SMP(mrc p15, 0, lr, c0, c0, 5) ALT_UP(mov lr, #0) @@ -51,12 +52,12 @@ ENTRY(cpu_suspend) @ flush data cache #ifdef MULTI_CACHE ldr r10, =cpu_cache - mov lr, r9 + mov lr, pc ldr pc, [r10, #CACHE_FLUSH_KERN_ALL] #else - mov lr, r9 - b __cpuc_flush_kern_all + bl __cpuc_flush_kern_all #endif + ldmfd sp!, {r0, pc} @ call suspend fn ENDPROC(cpu_suspend) .ltorg |