diff options
Diffstat (limited to 'arch/arm/mach-tegra/sleep.S')
| -rw-r--r-- | arch/arm/mach-tegra/sleep.S | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/arch/arm/mach-tegra/sleep.S b/arch/arm/mach-tegra/sleep.S index 08e9481c049e..91548a77dd95 100644 --- a/arch/arm/mach-tegra/sleep.S +++ b/arch/arm/mach-tegra/sleep.S @@ -25,9 +25,38 @@ #include <linux/linkage.h> #include <asm/assembler.h> +#include <asm/cp15.h> #include "iomap.h" #include "flowctrl.h" #include "sleep.h" +#ifdef CONFIG_PM_SLEEP +/* + * tegra_disable_clean_inv_dcache + * + * disable, clean & invalidate the D-cache + * + * Corrupted registers: r1-r3, r6, r8, r9-r11 + */ +ENTRY(tegra_disable_clean_inv_dcache) + stmfd sp!, {r0, r4-r5, r7, r9-r11, lr} + dmb @ ensure ordering + + /* Disable the D-cache */ + mrc p15, 0, r2, c1, c0, 0 + bic r2, r2, #CR_C + mcr p15, 0, r2, c1, c0, 0 + isb + + /* Flush the D-cache */ + bl v7_flush_dcache_louis + + /* Trun off coherency */ + exit_smp r4, r5 + + ldmfd sp!, {r0, r4-r5, r7, r9-r11, pc} +ENDPROC(tegra_disable_clean_inv_dcache) + +#endif |