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ARM: EXYNOS4: Add save/restore for other ARM registers

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This patch adds save/restore values for Power Control Register and
Diagnostic Register for PM.

Signed-off-by: Jaecheol Lee <jc.lee@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
This commit is contained in:
Jaecheol Lee 2011-07-18 19:25:03 +09:00 committed by Kukjin Kim
parent 12974e9f70
commit f4ba4b01ef
1 changed files with 25 additions and 1 deletions
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26
arch/arm/mach-exynos4/pm.c
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@ -207,7 +207,10 @@ static struct sleep_save exynos4_l2cc_save[] = {
SAVE_ITEM(S5P_VA_L2CC + L2X0_AUX_CTRL),
};
void exynos4_cpu_suspend(void)
/* For Cortex-A9 Diagnostic and Power control register */
static unsigned int save_arm_register[2];
void exynos4_cpu_suspend(unsigned long arg)
{
outer_flush_all();
@ -301,6 +304,16 @@ static int exynos4_pm_suspend(void)
tmp &= ~S5P_CENTRAL_LOWPWR_CFG;
__raw_writel(tmp, S5P_CENTRAL_SEQ_CONFIGURATION);
/* Save Power control register */
asm ("mrc p15, 0, %0, c15, c0, 0"
: "=r" (tmp) : : "cc");
save_arm_register[0] = tmp;
/* Save Diagnostic register */
asm ("mrc p15, 0, %0, c15, c0, 1"
: "=r" (tmp) : : "cc");
save_arm_register[1] = tmp;
return 0;
}
@ -321,6 +334,17 @@ static void exynos4_pm_resume(void)
/* No need to perform below restore code */
goto early_wakeup;
}
/* Restore Power control register */
tmp = save_arm_register[0];
asm volatile ("mcr p15, 0, %0, c15, c0, 0"
: : "r" (tmp)
: "cc");
/* Restore Diagnostic register */
tmp = save_arm_register[1];
asm volatile ("mcr p15, 0, %0, c15, c0, 1"
: : "r" (tmp)
: "cc");
/* For release retention */