Messages in this thread Patch in this message | | | From | Bartlomiej Zolnierkiewicz <> | Subject | [PATCH v3 2/4] ARM: EXYNOS: add code for setting/clearing boot flag | Date | Wed, 18 Mar 2015 13:51:51 +0100 |
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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> --- arch/arm/mach-exynos/common.h | 6 ++++++ arch/arm/mach-exynos/exynos.c | 25 +++++++++++++++++++++++++ 2 files changed, 31 insertions(+)
diff --git a/arch/arm/mach-exynos/common.h b/arch/arm/mach-exynos/common.h index f70eca7..87bf1f3 100644 --- a/arch/arm/mach-exynos/common.h +++ b/arch/arm/mach-exynos/common.h @@ -119,6 +119,12 @@ extern void __iomem *sysram_base_addr; extern void __iomem *pmu_base_addr; void exynos_sysram_init(void); +/* CPU BOOT mode flag */ +#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); + enum { FW_DO_IDLE_SLEEP, FW_DO_IDLE_AFTR, diff --git a/arch/arm/mach-exynos/exynos.c b/arch/arm/mach-exynos/exynos.c index 4031a96..90ed2e5 100644 --- a/arch/arm/mach-exynos/exynos.c +++ b/arch/arm/mach-exynos/exynos.c @@ -117,6 +117,31 @@ static void __init exynos_init_late(void) exynos_pm_init(); } +#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); +} + static int __init exynos_fdt_map_chipid(unsigned long node, const char *uname, int depth, void *data) { -- 1.8.2.3
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