diff options
| author | Mathieu J. Poirier <mathieu.poirier@linaro.org> | 2012-07-31 08:59:33 +0000 |
|---|---|---|
| committer | Albert ARIBAUD <albert.u.boot@aribaud.net> | 2012-09-01 14:58:20 +0200 |
| commit | f418597369c88912b8f7351eda02d28c3e1eb0d6 (patch) | |
| tree | 1b22653814e6e3c41ea2da89fe11f32be7ff2459 | |
| parent | 53e6f6a6340adba6ff2a970ff27ac741901a8776 (diff) | |
snowball: Adding board specific cache cleanup routine
Following ARM's reference manuel for initializing the cache - the
kernel won't boot otherwise.
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Signed-off-by: John Rigby <john.rigby@linaro.org>
| -rw-r--r-- | arch/arm/cpu/armv7/u8500/cpu.c | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/arch/arm/cpu/armv7/u8500/cpu.c b/arch/arm/cpu/armv7/u8500/cpu.c index 02bb332097a..6f95c306736 100644 --- a/arch/arm/cpu/armv7/u8500/cpu.c +++ b/arch/arm/cpu/armv7/u8500/cpu.c @@ -36,6 +36,14 @@ #define CPUID_DB8500V2 0x412fc091 #define ASICID_DB8500V11 0x008500A1 +#define CACHE_CONTR_BASE 0xA0412000 +/* Cache controller register offsets + * as found in ARM's technical reference manual + */ +#define CACHE_INVAL_BY_WAY (CACHE_CONTR_BASE + 0x77C) +#define CACHE_LOCKDOWN_BY_D (CACHE_CONTR_BASE + 0X900) +#define CACHE_LOCKDOWN_BY_I (CACHE_CONTR_BASE + 0X904) + static unsigned int read_asicid(void); static inline unsigned int read_cpuid(void) @@ -73,6 +81,24 @@ static unsigned int read_asicid(void) return readl(address); } +void cpu_cache_initialization(void) +{ + unsigned int value; + /* invalidate all cache entries */ + writel(0xFFFF, CACHE_INVAL_BY_WAY); + + /* ways are set to '0' when they are totally + * cleaned and invalidated + */ + do { + value = readl(CACHE_INVAL_BY_WAY); + } while (value & 0xFF); + + /* Invalidate register 9 D and I lockdown */ + writel(0xFF, CACHE_LOCKDOWN_BY_D); + writel(0xFF, CACHE_LOCKDOWN_BY_I); +} + #ifdef CONFIG_ARCH_CPU_INIT /* * SOC specific cpu init |