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| author | Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com> | 2015-03-27 02:32:56 +0900 |
|---|---|---|
| committer | Kukjin Kim <kgene@kernel.org> | 2015-03-27 02:32:56 +0900 |
| commit | dc1b9448d23deb51ad74a873392402560955dbc2 (patch) | |
| tree | 001875aa8d3efb61728c8f93b8bd662b837230a0 /arch/arm/mach-exynos | |
| parent | 497ab3b30c7687f52e6711e2ac72d1b696ec7685 (diff) | |
| download | linux-stable-dc1b9448d23deb51ad74a873392402560955dbc2.tar.gz linux-stable-dc1b9448d23deb51ad74a873392402560955dbc2.tar.bz2 linux-stable-dc1b9448d23deb51ad74a873392402560955dbc2.zip | |
ARM: EXYNOS: add code for setting/clearing boot flag
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>
Diffstat (limited to 'arch/arm/mach-exynos')
| -rw-r--r-- | arch/arm/mach-exynos/common.h | 6 | ||||
| -rw-r--r-- | arch/arm/mach-exynos/firmware.c | 25 |
2 files changed, 31 insertions, 0 deletions
diff --git a/arch/arm/mach-exynos/common.h b/arch/arm/mach-exynos/common.h index f70eca7ee705..acd5b560b728 100644 --- a/arch/arm/mach-exynos/common.h +++ b/arch/arm/mach-exynos/common.h @@ -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 diff --git a/arch/arm/mach-exynos/firmware.c b/arch/arm/mach-exynos/firmware.c index 4791a3cc00f9..27b8ae3e1f89 100644 --- a/arch/arm/mach-exynos/firmware.c +++ b/arch/arm/mach-exynos/firmware.c @@ -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); +} |