diff options
| author | Russell King <rmk+kernel@arm.linux.org.uk> | 2011-02-06 15:48:39 +0000 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2011-02-22 17:11:23 +0000 |
| commit | f6b0fa02e8b0708d17d631afce456524eadf87ff (patch) | |
| tree | 900fcd2149a03ba229bb29e982d3d6a5f3d3fcfc /arch/arm/mm/proc-arm926.S | |
| parent | 753790e713d80b50b867fa1ed32ec0eb5e82ae8e (diff) | |
ARM: pm: add generic CPU suspend/resume support
This adds core support for saving and restoring CPU coprocessor
registers for suspend/resume support. This contains support for suspend
with ARM920, ARM926, SA11x0, PXA25x, PXA27x, PXA3xx, V6 and V7 CPUs.
Tested on Assabet and Tegra 2.
Tested-by: Colin Cross <ccross@android.com>
Tested-by: Kukjin Kim <kgene.kim@samsung.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm/mm/proc-arm926.S')
| -rw-r--r-- | arch/arm/mm/proc-arm926.S | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/arch/arm/mm/proc-arm926.S b/arch/arm/mm/proc-arm926.S index 42eb4315740b..6a4bdb2c94a7 100644 --- a/arch/arm/mm/proc-arm926.S +++ b/arch/arm/mm/proc-arm926.S @@ -401,6 +401,40 @@ ENTRY(cpu_arm926_set_pte_ext) #endif mov pc, lr +/* Suspend/resume support: taken from arch/arm/plat-s3c24xx/sleep.S */ +.globl cpu_arm926_suspend_size +.equ cpu_arm926_suspend_size, 4 * 3 +#ifdef CONFIG_PM +ENTRY(cpu_arm926_do_suspend) + stmfd sp!, {r4 - r7, lr} + mrc p15, 0, r4, c13, c0, 0 @ PID + mrc p15, 0, r5, c3, c0, 0 @ Domain ID + mrc p15, 0, r6, c2, c0, 0 @ TTB address + mrc p15, 0, r7, c1, c0, 0 @ Control register + stmia r0, {r4 - r7} + ldmfd sp!, {r4 - r7, pc} +ENDPROC(cpu_arm926_do_suspend) + +ENTRY(cpu_arm926_do_resume) + mov ip, #0 + mcr p15, 0, ip, c8, c7, 0 @ invalidate I+D TLBs + mcr p15, 0, ip, c7, c7, 0 @ invalidate I+D caches + ldmia r0, {r4 - r7} + mcr p15, 0, r4, c13, c0, 0 @ PID + mcr p15, 0, r5, c3, c0, 0 @ Domain ID + mcr p15, 0, r6, c2, c0, 0 @ TTB address + mov r0, r7 @ control register + mov r2, r6, lsr #14 @ get TTB0 base + mov r2, r2, lsl #14 + ldr r3, =PMD_TYPE_SECT | PMD_SECT_BUFFERABLE | \ + PMD_SECT_CACHEABLE | PMD_BIT4 | PMD_SECT_AP_WRITE + b cpu_resume_mmu +ENDPROC(cpu_arm926_do_resume) +#else +#define cpu_arm926_do_suspend 0 +#define cpu_arm926_do_resume 0 +#endif + __CPUINIT .type __arm926_setup, #function @@ -456,6 +490,9 @@ arm926_processor_functions: .word cpu_arm926_dcache_clean_area .word cpu_arm926_switch_mm .word cpu_arm926_set_pte_ext + .word cpu_arm926_suspend_size + .word cpu_arm926_do_suspend + .word cpu_arm926_do_resume .size arm926_processor_functions, . - arm926_processor_functions .section ".rodata" |