ARM: pm: add generic CPU suspend/resume support

[GitHub/mt8127/android_kernel_alcatel_ttab.git] / arch / arm / mm / proc-arm920.S

diff --git a/arch/arm/mm/proc-arm920.S b/arch/arm/mm/proc-arm920.S
index 6109f278a9045f4429bcd31ca9a4f8a092d3c66f..219980ec8b6e6b8065d4a58ff2d743334c31b8e8 100644 (file)
--- a/arch/arm/mm/proc-arm920.S
+++ b/arch/arm/mm/proc-arm920.S
@@ -387,6 +387,40 @@ ENTRY(cpu_arm920_set_pte_ext)
 #endif
        mov     pc, lr
 
+/* Suspend/resume support: taken from arch/arm/plat-s3c24xx/sleep.S */
+.globl cpu_arm920_suspend_size
+.equ   cpu_arm920_suspend_size, 4 * 3
+#ifdef CONFIG_PM
+ENTRY(cpu_arm920_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_arm920_do_suspend)
+
+ENTRY(cpu_arm920_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_arm920_do_resume)
+#else
+#define cpu_arm920_do_suspend  0
+#define cpu_arm920_do_resume   0
+#endif
+
        __CPUINIT
 
        .type   __arm920_setup, #function
@@ -432,6 +466,9 @@ arm920_processor_functions:
        .word   cpu_arm920_dcache_clean_area
        .word   cpu_arm920_switch_mm
        .word   cpu_arm920_set_pte_ext
+       .word   cpu_arm920_suspend_size
+       .word   cpu_arm920_do_suspend
+       .word   cpu_arm920_do_resume
        .size   arm920_processor_functions, . - arm920_processor_functions
 
        .section ".rodata"