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Diffstat (limited to 'arch/arm/cpu/armv7/exynos/common_setup.h')
-rw-r--r--arch/arm/cpu/armv7/exynos/common_setup.h62
1 files changed, 62 insertions, 0 deletions
diff --git a/arch/arm/cpu/armv7/exynos/common_setup.h b/arch/arm/cpu/armv7/exynos/common_setup.h
index e6318c0366..5235abb808 100644
--- a/arch/arm/cpu/armv7/exynos/common_setup.h
+++ b/arch/arm/cpu/armv7/exynos/common_setup.h
@@ -23,6 +23,8 @@
* MA 02111-1307 USA
*/
+#include <asm/arch/system.h>
+
#define DMC_OFFSET 0x10000
/*
@@ -43,3 +45,63 @@ void system_clock_init(void);
int do_lowlevel_init(void);
void sdelay(unsigned long);
+
+enum l2_cache_params {
+ CACHE_DATA_RAM_LATENCY_2_CYCLES = (2 << 0),
+ CACHE_DATA_RAM_LATENCY_3_CYCLES = (3 << 0),
+ CACHE_DISABLE_CLEAN_EVICT = (1 << 3),
+ CACHE_DATA_RAM_SETUP = (1 << 5),
+ CACHE_TAG_RAM_LATENCY_2_CYCLES = (2 << 6),
+ CACHE_TAG_RAM_LATENCY_3_CYCLES = (3 << 6),
+ CACHE_ENABLE_HAZARD_DETECT = (1 << 7),
+ CACHE_TAG_RAM_SETUP = (1 << 9),
+ CACHE_ECC_AND_PARITY = (1 << 21),
+ CACHE_ENABLE_FORCE_L2_LOGIC = (1 << 27)
+};
+
+
+#ifndef CONFIG_SYS_L2CACHE_OFF
+/*
+ * Configure L2CTLR to get timings that keep us from hanging/crashing.
+ *
+ * Must be inline here since low_power_start() is called without a
+ * stack (!).
+ */
+static inline void configure_l2_ctlr(void)
+{
+ uint32_t val;
+
+ mrc_l2_ctlr(val);
+
+ val |= CACHE_TAG_RAM_SETUP |
+ CACHE_DATA_RAM_SETUP |
+ CACHE_TAG_RAM_LATENCY_2_CYCLES |
+ CACHE_DATA_RAM_LATENCY_2_CYCLES;
+
+ if (proid_is_exynos5420() || proid_is_exynos5800()) {
+ val |= CACHE_ECC_AND_PARITY |
+ CACHE_TAG_RAM_LATENCY_3_CYCLES |
+ CACHE_DATA_RAM_LATENCY_3_CYCLES;
+ }
+
+ mcr_l2_ctlr(val);
+}
+
+/*
+ * Configure L2ACTLR.
+ *
+ * Must be inline here since low_power_start() is called without a
+ * stack (!).
+ */
+static inline void configure_l2_actlr(void)
+{
+ uint32_t val;
+
+ if (proid_is_exynos5420() || proid_is_exynos5800()) {
+ mrc_l2_aux_ctlr(val);
+ val |= CACHE_ENABLE_FORCE_L2_LOGIC |
+ CACHE_DISABLE_CLEAN_EVICT;
+ mcr_l2_aux_ctlr(val);
+ }
+}
+#endif