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>
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 @@
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);
+}