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Subject[PATCH v4 2/4] ARM: EXYNOS: add code for setting/clearing boot flag
Date
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/firmware.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..acd5b56 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 4791a3c..27b8ae3 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);
+}
--
1.8.2.3


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