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| author | Russell King <rmk+kernel@arm.linux.org.uk> | 2011-02-06 18:48:39 +0300 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2011-02-22 20:11:23 +0300 |
| commit | f6b0fa02e8b0708d17d631afce456524eadf87ff (patch) | |
| tree | 900fcd2149a03ba229bb29e982d3d6a5f3d3fcfc /arch/arm/mm/proc-xscale.S | |
| parent | 753790e713d80b50b867fa1ed32ec0eb5e82ae8e (diff) | |
| download | linux-f6b0fa02e8b0708d17d631afce456524eadf87ff.tar.xz | |
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-xscale.S')
| -rw-r--r-- | arch/arm/mm/proc-xscale.S | 45 |
1 files changed, 43 insertions, 2 deletions
diff --git a/arch/arm/mm/proc-xscale.S b/arch/arm/mm/proc-xscale.S index 5a37c5e45c41..086038cd86ab 100644 --- a/arch/arm/mm/proc-xscale.S +++ b/arch/arm/mm/proc-xscale.S @@ -513,11 +513,49 @@ ENTRY(cpu_xscale_set_pte_ext) xscale_set_pte_ext_epilogue mov pc, lr - .ltorg - .align +.globl cpu_xscale_suspend_size +.equ cpu_xscale_suspend_size, 4 * 7 +#ifdef CONFIG_PM +ENTRY(cpu_xscale_do_suspend) + stmfd sp!, {r4 - r10, lr} + mrc p14, 0, r4, c6, c0, 0 @ clock configuration, for turbo mode + mrc p15, 0, r5, c15, c1, 0 @ CP access reg + mrc p15, 0, r6, c13, c0, 0 @ PID + mrc p15, 0, r7, c3, c0, 0 @ domain ID + mrc p15, 0, r8, c2, c0, 0 @ translation table base addr + mrc p15, 0, r9, c1, c1, 0 @ auxiliary control reg + mrc p15, 0, r10, c1, c0, 0 @ control reg + bic r4, r4, #2 @ clear frequency change bit + stmia r0, {r4 - r10} @ store cp regs + ldmfd sp!, {r4 - r10, pc} +ENDPROC(cpu_xscale_do_suspend) + +ENTRY(cpu_xscale_do_resume) + ldmia r0, {r4 - r10} @ load cp regs + 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, BTB + mcr p14, 0, r4, c6, c0, 0 @ clock configuration, turbo mode. + mcr p15, 0, r5, c15, c1, 0 @ CP access reg + mcr p15, 0, r6, c13, c0, 0 @ PID + mcr p15, 0, r7, c3, c0, 0 @ domain ID + mcr p15, 0, r8, c2, c0, 0 @ translation table base addr + mcr p15, 0, r9, c1, c1, 0 @ auxiliary control reg + mov r0, r10 @ control register + mov r2, r8, lsr #14 @ get TTB0 base + mov r2, r2, lsl #14 + ldr r3, =PMD_TYPE_SECT | PMD_SECT_BUFFERABLE | \ + PMD_SECT_CACHEABLE | PMD_SECT_AP_WRITE + b cpu_resume_mmu +ENDPROC(cpu_xscale_do_resume) +#else +#define cpu_xscale_do_suspend 0 +#define cpu_xscale_do_resume 0 +#endif + __CPUINIT .type __xscale_setup, #function @@ -565,6 +603,9 @@ ENTRY(xscale_processor_functions) .word cpu_xscale_dcache_clean_area .word cpu_xscale_switch_mm .word cpu_xscale_set_pte_ext + .word cpu_xscale_suspend_size + .word cpu_xscale_do_suspend + .word cpu_xscale_do_resume .size xscale_processor_functions, . - xscale_processor_functions .section ".rodata" |