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ARM: EXYNOS: add code for setting/clearing boot flag

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This code is needed for cpuidle (W-)AFTR mode support on Exynos3250.

Cc: Daniel Lezcano <daniel.lezcano@linaro.org>
Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Acked-by: Kyungmin Park <kyungmin.park@samsung.com>
Tested-by: Chanwoo Choi <cw00.choi@samsung.com>
Signed-off-by: Kukjin Kim <kgene@kernel.org>
This commit is contained in:
Bartlomiej Zolnierkiewicz 2015-03-27 02:32:56 +09:00 committed by Kukjin Kim
parent 497ab3b30c
commit dc1b9448d2
2 changed files with 31 additions and 0 deletions
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6
arch/arm/mach-exynos/common.h
View File

@ -126,6 +126,12 @@ enum {
void exynos_firmware_init(void);
/* CPU BOOT mode flag for Exynos3250 SoC bootloader */
#define C2_STATE (1 << 3)
void exynos_set_boot_flag(unsigned int cpu, unsigned int mode);
void exynos_clear_boot_flag(unsigned int cpu, unsigned int mode);
extern u32 exynos_get_eint_wake_mask(void);
#ifdef CONFIG_PM_SLEEP

25
arch/arm/mach-exynos/firmware.c
View File

@ -206,3 +206,28 @@ void __init exynos_firmware_init(void)
outer_cache.configure = exynos_l2_configure;
}
}
#define REG_CPU_STATE_ADDR (sysram_ns_base_addr + 0x28)
#define BOOT_MODE_MASK 0x1f
void exynos_set_boot_flag(unsigned int cpu, unsigned int mode)
{
unsigned int tmp;
tmp = __raw_readl(REG_CPU_STATE_ADDR + cpu * 4);
if (mode & BOOT_MODE_MASK)
tmp &= ~BOOT_MODE_MASK;
tmp |= mode;
__raw_writel(tmp, REG_CPU_STATE_ADDR + cpu * 4);
}
void exynos_clear_boot_flag(unsigned int cpu, unsigned int mode)
{
unsigned int tmp;
tmp = __raw_readl(REG_CPU_STATE_ADDR + cpu * 4);
tmp &= ~mode;
__raw_writel(tmp, REG_CPU_STATE_ADDR + cpu * 4);
}