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powerpc/32: define helpers to get L1 cache sizes.

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This patch defines C helpers to retrieve the size of
cache blocks and uses them in the cacheflush functions.

Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Christophe Leroy
2019-05-14 09:05:15 +00:00
committed by Michael Ellerman
parent 1cfb725fb1
commit d98fc70fc1
2 changed files with 29 additions and 11 deletions
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24
arch/powerpc/include/asm/cacheflush.h
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@@ -67,11 +67,13 @@ static inline void __flush_dcache_icache_phys(unsigned long physaddr)
*/
static inline void flush_dcache_range(unsigned long start, unsigned long stop)
{
void *addr = (void *)(start & ~(L1_CACHE_BYTES - 1));
unsigned long size = stop - (unsigned long)addr + (L1_CACHE_BYTES - 1);
unsigned long shift = l1_cache_shift();
unsigned long bytes = l1_cache_bytes();
void *addr = (void *)(start & ~(bytes - 1));
unsigned long size = stop - (unsigned long)addr + (bytes - 1);
unsigned long i;
for (i = 0; i < size >> L1_CACHE_SHIFT; i++, addr += L1_CACHE_BYTES)
for (i = 0; i < size >> shift; i++, addr += bytes)
dcbf(addr);
mb(); /* sync */
}
@@ -83,11 +85,13 @@ static inline void flush_dcache_range(unsigned long start, unsigned long stop)
*/
static inline void clean_dcache_range(unsigned long start, unsigned long stop)
{
void *addr = (void *)(start & ~(L1_CACHE_BYTES - 1));
unsigned long size = stop - (unsigned long)addr + (L1_CACHE_BYTES - 1);
unsigned long shift = l1_cache_shift();
unsigned long bytes = l1_cache_bytes();
void *addr = (void *)(start & ~(bytes - 1));
unsigned long size = stop - (unsigned long)addr + (bytes - 1);
unsigned long i;
for (i = 0; i < size >> L1_CACHE_SHIFT; i++, addr += L1_CACHE_BYTES)
for (i = 0; i < size >> shift; i++, addr += bytes)
dcbst(addr);
mb(); /* sync */
}
@@ -100,11 +104,13 @@ static inline void clean_dcache_range(unsigned long start, unsigned long stop)
static inline void invalidate_dcache_range(unsigned long start,
unsigned long stop)
{
void *addr = (void *)(start & ~(L1_CACHE_BYTES - 1));
unsigned long size = stop - (unsigned long)addr + (L1_CACHE_BYTES - 1);
unsigned long shift = l1_cache_shift();
unsigned long bytes = l1_cache_bytes();
void *addr = (void *)(start & ~(bytes - 1));
unsigned long size = stop - (unsigned long)addr + (bytes - 1);
unsigned long i;
for (i = 0; i < size >> L1_CACHE_SHIFT; i++, addr += L1_CACHE_BYTES)
for (i = 0; i < size >> shift; i++, addr += bytes)
dcbi(addr);
mb(); /* sync */
}