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rk27xx: slightly optimize commit_discard_dcache_range()

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Change-Id: I13ce643d4ba26db5de9ffa083070d7f40b0e7b1f
This commit is contained in:
Marcin Bukat 2013-01-12 21:57:37 +01:00
parent e2be0e75ab
commit 29e51a1777
1 changed files with 5 additions and 6 deletions
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11
firmware/target/arm/rk27xx/system-rk27xx.c
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@ -218,18 +218,17 @@ void commit_discard_dcache (void) __attribute__((alias("commit_discard_idcache")
void commit_discard_dcache_range (const void *base, unsigned int size) void commit_discard_dcache_range (const void *base, unsigned int size)
{ {
int cnt = size + ((unsigned long)base & 0x1f); /* 0x01 is opcode for cache line commit discard */
unsigned long opcode = ((unsigned long)base & 0xffffffe0) | 0x01; uint32_t end_opcode = (uint32_t)((uintptr_t)base + size) | 0x01;
uint32_t opcode = (uint32_t)((uintptr_t)base & 0xffffffe0) | 0x01;
int old_irq = disable_irq_save(); int old_irq = disable_irq_save();
while (cnt > 0) while (opcode <= end_opcode)
{ {
CACHEOP = opcode;
while (CACHEOP & 0x03); while (CACHEOP & 0x03);
cnt -= 32; CACHEOP = opcode;
opcode += 32; opcode += 32;
} }