summaryrefslogtreecommitdiff
diff options
context:
space:
mode:
-rw-r--r--arch/arm/cpu/armv7/exynos/soc.c36
1 files changed, 36 insertions, 0 deletions
diff --git a/arch/arm/cpu/armv7/exynos/soc.c b/arch/arm/cpu/armv7/exynos/soc.c
index ab65b8d3a8..e948e4c638 100644
--- 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