This code is needed for cpuidle (W-)AFTR mode support on Exynos3250.
Cc: Daniel Lezcano <daniel.lezcano@xxxxxxxxxx>
Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@xxxxxxxxxxx>
Acked-by: Kyungmin Park <kyungmin.park@xxxxxxxxxxx>
---
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 2013f73..c599a0f 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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