0ce636700c
As Benjamin Herrenschmidt has indicated, we still need a dummy icbi to purge all the prefetched instructions from the ifetch buffers for the snooping icache. We also need a sync before the icbi to order the actual stores to memory that might have modified instructions with the icbi. Signed-off-by: Kevin Hao <haokexin@gmail.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
77 lines
1.9 KiB
C
77 lines
1.9 KiB
C
#ifndef _ASM_POWERPC_CACHE_H
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#define _ASM_POWERPC_CACHE_H
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#ifdef __KERNEL__
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/* bytes per L1 cache line */
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#if defined(CONFIG_8xx) || defined(CONFIG_403GCX)
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#define L1_CACHE_SHIFT 4
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#define MAX_COPY_PREFETCH 1
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#elif defined(CONFIG_PPC_E500MC)
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#define L1_CACHE_SHIFT 6
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#define MAX_COPY_PREFETCH 4
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#elif defined(CONFIG_PPC32)
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#define MAX_COPY_PREFETCH 4
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#if defined(CONFIG_PPC_47x)
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#define L1_CACHE_SHIFT 7
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#else
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#define L1_CACHE_SHIFT 5
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#endif
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#else /* CONFIG_PPC64 */
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#define L1_CACHE_SHIFT 7
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#endif
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#define L1_CACHE_BYTES (1 << L1_CACHE_SHIFT)
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#define SMP_CACHE_BYTES L1_CACHE_BYTES
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#if defined(__powerpc64__) && !defined(__ASSEMBLY__)
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struct ppc64_caches {
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u32 dsize; /* L1 d-cache size */
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u32 dline_size; /* L1 d-cache line size */
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u32 log_dline_size;
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u32 dlines_per_page;
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u32 isize; /* L1 i-cache size */
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u32 iline_size; /* L1 i-cache line size */
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u32 log_iline_size;
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u32 ilines_per_page;
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};
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extern struct ppc64_caches ppc64_caches;
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#endif /* __powerpc64__ && ! __ASSEMBLY__ */
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#if defined(__ASSEMBLY__)
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/*
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* For a snooping icache, we still need a dummy icbi to purge all the
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* prefetched instructions from the ifetch buffers. We also need a sync
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* before the icbi to order the the actual stores to memory that might
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* have modified instructions with the icbi.
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*/
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#define PURGE_PREFETCHED_INS \
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sync; \
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icbi 0,r3; \
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sync; \
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isync
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#else
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#define __read_mostly __attribute__((__section__(".data..read_mostly")))
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#ifdef CONFIG_6xx
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extern long _get_L2CR(void);
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extern long _get_L3CR(void);
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extern void _set_L2CR(unsigned long);
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extern void _set_L3CR(unsigned long);
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#else
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#define _get_L2CR() 0L
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#define _get_L3CR() 0L
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#define _set_L2CR(val) do { } while(0)
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#define _set_L3CR(val) do { } while(0)
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#endif
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extern void cacheable_memzero(void *p, unsigned int nb);
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extern void *cacheable_memcpy(void *, const void *, unsigned int);
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#endif /* !__ASSEMBLY__ */
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#endif /* __KERNEL__ */
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#endif /* _ASM_POWERPC_CACHE_H */
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