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| author | Rajeshwari Shinde <rajeshwari.s@samsung.com> | 2012-11-29 20:29:35 +0000 |
|---|---|---|
| committer | Minkyu Kang <mk7.kang@samsung.com> | 2013-03-27 16:53:37 +0900 |
| commit | 7ee68fe85f1a9e9db17d9760998c284cb85f56fa (patch) | |
| tree | 71ab4ae739c7ebedf68d6c26f09ac13b21976679 /arch/arm/cpu/armv7/exynos/soc.c | |
| parent | ebd749da69f423a26222d2cdde9a77007fd8b4b7 (diff) | |
| download | blackbird-obmc-uboot-7ee68fe85f1a9e9db17d9760998c284cb85f56fa.tar.gz blackbird-obmc-uboot-7ee68fe85f1a9e9db17d9760998c284cb85f56fa.zip | |
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>
Diffstat (limited to 'arch/arm/cpu/armv7/exynos/soc.c')
| -rw-r--r-- | arch/arm/cpu/armv7/exynos/soc.c | 36 |
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 |
