cache_wback_all() is a local function and it is called from cache_control() only, which is in turn jumps to P2 area.
The change fixes an issue when cache_wback_all() returns from P2 to P1, however cache_control() continues to manipulate with CCR register, according to the User's Manual this is restricted.
Signed-off-by: Vladimir Zapolskiy vz@mleia.com --- arch/sh/cpu/sh4/cache.c | 8 +++----- 1 file changed, 3 insertions(+), 5 deletions(-)
diff --git a/arch/sh/cpu/sh4/cache.c b/arch/sh/cpu/sh4/cache.c index 50695b6..7750f0f 100644 --- a/arch/sh/cpu/sh4/cache.c +++ b/arch/sh/cpu/sh4/cache.c @@ -18,10 +18,10 @@ static inline void cache_wback_all(void) { unsigned long addr, data, i, j;
- jump_to_P2(); - for (i = 0; i < CACHE_OC_NUM_ENTRIES; i++){ + for (i = 0; i < CACHE_OC_NUM_ENTRIES; i++) { for (j = 0; j < CACHE_OC_NUM_WAYS; j++) { - addr = CACHE_OC_ADDRESS_ARRAY | (j << CACHE_OC_WAY_SHIFT) + addr = CACHE_OC_ADDRESS_ARRAY + | (j << CACHE_OC_WAY_SHIFT) | (i << CACHE_OC_ENTRY_SHIFT); data = inl(addr); if (data & CACHE_UPDATED) { @@ -30,10 +30,8 @@ static inline void cache_wback_all(void) } } } - back_to_P1(); }
- #define CACHE_ENABLE 0 #define CACHE_DISABLE 1