1 files changed, 47 insertions, 13 deletions

diff --git a/arch/arm/mach-exynos/common.c b/arch/arm/mach-exynos/common.c
index f494db872c67..97ca2592ce83 100644
--- a/arch/arm/mach-exynos/common.c
+++ b/arch/arm/mach-exynos/common.c
@@ -26,10 +26,12 @@
 #include <asm/hardware/gic.h>
 #include <asm/mach/map.h>
 #include <asm/mach/irq.h>
+#include <asm/cacheflush.h>
 
 #include <mach/regs-irq.h>
 #include <mach/regs-pmu.h>
 #include <mach/regs-gpio.h>
+#include <mach/pmu.h>
 
 #include <plat/cpu.h>
 #include <plat/clock.h>
@@ -45,6 +47,8 @@
 #include <plat/regs-serial.h>
 
 #include "common.h"
+#define L2_AUX_VAL 0x7C470001
+#define L2_AUX_MASK 0xC200ffff
 
 static const char name_exynos4210[] = "EXYNOS4210";
 static const char name_exynos4212[] = "EXYNOS4212";
@@ -173,7 +177,12 @@ static struct map_desc exynos4_iodesc[] __initdata = {
 	}, {
 		.virtual	= (unsigned long)S5P_VA_DMC0,
 		.pfn		= __phys_to_pfn(EXYNOS4_PA_DMC0),
-		.length		= SZ_4K,
+		.length		= SZ_64K,
+		.type		= MT_DEVICE,
+	}, {
+		.virtual	= (unsigned long)S5P_VA_DMC1,
+		.pfn		= __phys_to_pfn(EXYNOS4_PA_DMC1),
+		.length		= SZ_64K,
 		.type		= MT_DEVICE,
 	}, {
 		.virtual	= (unsigned long)S3C_VA_USB_HSPHY,
@@ -433,23 +442,48 @@ core_initcall(exynos4_core_init);
 #ifdef CONFIG_CACHE_L2X0
 static int __init exynos4_l2x0_cache_init(void)
 {
-	/* TAG, Data Latency Control: 2cycle */
-	__raw_writel(0x110, S5P_VA_L2CC + L2X0_TAG_LATENCY_CTRL);
+	int ret;
+	ret = l2x0_of_init(L2_AUX_VAL, L2_AUX_MASK);
+	if (!ret) {
+		l2x0_regs_phys = virt_to_phys(&l2x0_saved_regs);
+		clean_dcache_area(&l2x0_regs_phys, sizeof(unsigned long));
+		return 0;
+	}
 
-	if (soc_is_exynos4210())
-		__raw_writel(0x110, S5P_VA_L2CC + L2X0_DATA_LATENCY_CTRL);
-	else if (soc_is_exynos4212() || soc_is_exynos4412())
-		__raw_writel(0x120, S5P_VA_L2CC + L2X0_DATA_LATENCY_CTRL);
+	if (!(__raw_readl(S5P_VA_L2CC + L2X0_CTRL) & 0x1)) {
+		l2x0_saved_regs.phy_base = EXYNOS4_PA_L2CC;
+		/* TAG, Data Latency Control: 2 cycles */
+		l2x0_saved_regs.tag_latency = 0x110;
+
+		if (soc_is_exynos4212() || soc_is_exynos4412())
+			l2x0_saved_regs.data_latency = 0x120;
+		else
+			l2x0_saved_regs.data_latency = 0x110;
+
+		l2x0_saved_regs.prefetch_ctrl = 0x30000007;
+		l2x0_saved_regs.pwr_ctrl =
+			(L2X0_DYNAMIC_CLK_GATING_EN | L2X0_STNDBY_MODE_EN);
 
-	/* L2X0 Prefetch Control */
-	__raw_writel(0x30000007, S5P_VA_L2CC + L2X0_PREFETCH_CTRL);
+		l2x0_regs_phys = virt_to_phys(&l2x0_saved_regs);
 
-	/* L2X0 Power Control */
-	__raw_writel(L2X0_DYNAMIC_CLK_GATING_EN | L2X0_STNDBY_MODE_EN,
-		     S5P_VA_L2CC + L2X0_POWER_CTRL);
+		__raw_writel(l2x0_saved_regs.tag_latency,
+				S5P_VA_L2CC + L2X0_TAG_LATENCY_CTRL);
+		__raw_writel(l2x0_saved_regs.data_latency,
+				S5P_VA_L2CC + L2X0_DATA_LATENCY_CTRL);
 
-	l2x0_init(S5P_VA_L2CC, 0x7C470001, 0xC200ffff);
+		/* L2X0 Prefetch Control */
+		__raw_writel(l2x0_saved_regs.prefetch_ctrl,
+				S5P_VA_L2CC + L2X0_PREFETCH_CTRL);
+
+		/* L2X0 Power Control */
+		__raw_writel(l2x0_saved_regs.pwr_ctrl,
+				S5P_VA_L2CC + L2X0_POWER_CTRL);
+
+		clean_dcache_area(&l2x0_regs_phys, sizeof(unsigned long));
+		clean_dcache_area(&l2x0_saved_regs, sizeof(struct l2x0_regs));
+	}
 
+	l2x0_init(S5P_VA_L2CC, L2_AUX_VAL, L2_AUX_MASK);
 	return 0;
 }