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

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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16
arch/powerpc/include/asm/cache.h
View File

@ -33,7 +33,8 @@
#define IFETCH_ALIGN_BYTES (1 << IFETCH_ALIGN_SHIFT)
#if defined(__powerpc64__) && !defined(__ASSEMBLY__)
#if !defined(__ASSEMBLY__)
#ifdef CONFIG_PPC64
struct ppc_cache_info {
u32 size;
@ -53,7 +54,18 @@ struct ppc64_caches {
};
extern struct ppc64_caches ppc64_caches;
#endif /* __powerpc64__ && ! __ASSEMBLY__ */
#else
static inline u32 l1_cache_shift(void)
{
return L1_CACHE_SHIFT;
}
static inline u32 l1_cache_bytes(void)
{
return L1_CACHE_BYTES;
}
#endif
#endif /* ! __ASSEMBLY__ */
#if defined(__ASSEMBLY__)
/*

24
arch/powerpc/include/asm/cacheflush.h
View File

@ -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 */
}