EXYNOS5: Add L2 Cache Support.

This patch set adds L2 Cache Support to EXYNOS.

Signed-off-by: Arun Mankuzhi <arun.m@samsung.com>
Signed-off-by: Rajeshwari Shinde <rajeshwari.s@samsung.com>
Acked-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>

diff --git a/arch/arm/cpu/armv7/exynos/soc.c b/arch/arm/cpu/armv7/exynos/soc.c
index ab65b8d3a86536e16240c6a8e59b99574d278e87..e948e4c638d57daff6780672566045d5a80b6015 100644 (file)
--- a/arch/arm/cpu/armv7/exynos/soc.c
+++ b/arch/arm/cpu/armv7/exynos/soc.c
@@ -23,6 +23,14 @@
 
 #include <common.h>
 #include <asm/io.h>
+#include <asm/system.h>
+
+enum l2_cache_params {
+       CACHE_TAG_RAM_SETUP = (1 << 9),
+       CACHE_DATA_RAM_SETUP = (1 << 5),
+       CACHE_TAG_RAM_LATENCY = (2 << 6),
+       CACHE_DATA_RAM_LATENCY = (2 << 0)
+};
 
 void reset_cpu(ulong addr)
 {
@@ -36,3 +44,31 @@ void enable_caches(void)
        dcache_enable();
 }
 #endif
+
+#ifndef CONFIG_SYS_L2CACHE_OFF
+/*
+ * Set L2 cache parameters
+ */
+static void exynos5_set_l2cache_params(void)
+{
+       unsigned int val = 0;
+
+       asm volatile("mrc p15, 1, %0, c9, c0, 2\n" : "=r"(val));
+
+       val |= CACHE_TAG_RAM_SETUP |
+               CACHE_DATA_RAM_SETUP |
+               CACHE_TAG_RAM_LATENCY |
+               CACHE_DATA_RAM_LATENCY;
+
+       asm volatile("mcr p15, 1, %0, c9, c0, 2\n" : : "r"(val));
+}
+
+/*
+ * Sets L2 cache related parameters before enabling data cache
+ */
+void v7_outer_cache_enable(void)
+{
+       if (cpu_is_exynos5())
+               exynos5_set_l2cache_params();
+}
+#endif