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sh: cache: don't modify CCR from P1 area

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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>
This commit is contained in:
Vladimir Zapolskiy 2016-11-28 00:15:17 +02:00 • committed by Tom Rini
parent c230a37838
commit 6ab8b961de
1 changed files with 3 additions and 5 deletions
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8
arch/sh/cpu/sh4/cache.c
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@ -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