OMAP4: Enable L2 Cache support for OMAP4430 SDP

This patch enables L2 Cache support for OMAP4.
Signed-off-by: Santosh Shilimkar <santosh.shilimkar@ti.com>

arch/arm/configs/omap_4430sdp_defconfig

@@ -229,7 +229,7 @@ CONFIG_HAS_TLS_REG=y
 # CONFIG_ARM_ERRATA_458693 is not set
 # CONFIG_ARM_ERRATA_460075 is not set
 CONFIG_ARM_GIC=y
-
+# CONFIG_CACHE_L2X0 is not set
 #
 # Bus support
 #

arch/arm/mach-omap2/board-4430sdp.c

@@ -28,6 +28,7 @@
 #include <mach/control.h>
 #include <mach/timer-gp.h>
 #include <asm/hardware/gic.h>
+#include <asm/hardware/cache-l2x0.h>
 
 static struct platform_device sdp4430_lcd_device = {
 	.name		= "sdp4430_lcd",
@@ -70,6 +71,16 @@ static void __init omap_4430sdp_init_irq(void)
 
 static void __init omap_4430sdp_init(void)
 {
+#ifdef CONFIG_CACHE_L2X0
+	void __iomem *l2cache_base = IO_ADDRESS(OMAP44XX_L2CACHE_BASE);
+
+	/* set RAM latencies to 1 cycle for eASIC */
+	writel(0, l2cache_base + L2X0_TAG_LATENCY_CTRL);
+	writel(0, l2cache_base + L2X0_DATA_LATENCY_CTRL);
+	/* 16KB way size, 8-way associativity, parity disabled
+	* Bits:  .. 0 0 0 0 1 00 1 0 1 001 0 000 0 .... .... .... */
+	l2x0_init(l2cache_base, 0x02520000, 0xc0000fff);
+#endif
 	platform_add_devices(sdp4430_devices, ARRAY_SIZE(sdp4430_devices));
 	omap_board_config = sdp4430_config;
 	omap_board_config_size = ARRAY_SIZE(sdp4430_config);

arch/arm/mm/Kconfig

@@ -758,7 +758,7 @@ config CACHE_FEROCEON_L2_WRITETHROUGH
 config CACHE_L2X0
 	bool "Enable the L2x0 outer cache controller"
 	depends on REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP || MACH_REALVIEW_PB1176 || \
-		   REALVIEW_EB_A9MP || ARCH_MX35 || ARCH_MX31 || MACH_REALVIEW_PBX
+		   REALVIEW_EB_A9MP || ARCH_MX35 || ARCH_MX31 || MACH_REALVIEW_PBX || ARCH_OMAP4
 	default y
 	select OUTER_CACHE
 	help

arch/arm/plat-omap/include/mach/omap44xx.h

@@ -43,6 +43,8 @@
 #define OMAP44XX_LOCAL_TWD_SIZE		0x00000100
 #define OMAP44XX_WKUPGEN_BASE		0x48281000
 #define OMAP44XX_VA_WKUPGEN_BASE	IO_ADDRESS(OMAP44XX_WKUPGEN_BASE)
+#define OMAP44XX_L2CACHE_BASE		0x48242000
+#define OMAP44XX_VA_L2CACHE_BASE	0x48242000
 
 #endif /* __ASM_ARCH_OMAP44XX_H */