diff options
Diffstat (limited to 'arch/arm/mach-tegra/sleep.S')
| -rw-r--r-- | arch/arm/mach-tegra/sleep.S | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/arch/arm/mach-tegra/sleep.S b/arch/arm/mach-tegra/sleep.S index 91548a77dd95..88f4de986a52 100644 --- a/arch/arm/mach-tegra/sleep.S +++ b/arch/arm/mach-tegra/sleep.S @@ -25,6 +25,7 @@ #include <linux/linkage.h> #include <asm/assembler.h> +#include <asm/cache.h> #include <asm/cp15.h> #include "iomap.h" @@ -59,4 +60,45 @@ ENTRY(tegra_disable_clean_inv_dcache) ldmfd sp!, {r0, r4-r5, r7, r9-r11, pc} ENDPROC(tegra_disable_clean_inv_dcache) +/* + * tegra_sleep_cpu_finish(unsigned long v2p) + * + * enters suspend in LP2 by turning off the mmu and jumping to + * tegra?_tear_down_cpu + */ +ENTRY(tegra_sleep_cpu_finish) + /* Flush and disable the L1 data cache */ + bl tegra_disable_clean_inv_dcache + + mov32 r6, tegra_tear_down_cpu + ldr r1, [r6] + add r1, r1, r0 + + mov32 r3, tegra_shut_off_mmu + add r3, r3, r0 + mov r0, r1 + + mov pc, r3 +ENDPROC(tegra_sleep_cpu_finish) + +/* + * tegra_shut_off_mmu + * + * r0 = physical address to jump to with mmu off + * + * called with VA=PA mapping + * turns off MMU, icache, dcache and branch prediction + */ + .align L1_CACHE_SHIFT + .pushsection .idmap.text, "ax" +ENTRY(tegra_shut_off_mmu) + mrc p15, 0, r3, c1, c0, 0 + movw r2, #CR_I | CR_Z | CR_C | CR_M + bic r3, r3, r2 + dsb + mcr p15, 0, r3, c1, c0, 0 + isb + mov pc, r0 +ENDPROC(tegra_shut_off_mmu) + .popsection #endif |