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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-23 09:26:06 +07:00
b05ae4ee60
These functions are only used from one place each. If the cacheable_*
versions really are more efficient, then those changes should be
migrated into the common code instead.
NOTE: The old routines are just flat buggy on kernels that support
hardware with different cacheline sizes.
Signed-off-by: Kyle Moffett <Kyle.D.Moffett@boeing.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
82 lines
1.9 KiB
C
82 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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#include <asm/reg.h>
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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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static inline void logmpp(u64 x)
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{
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asm volatile(PPC_LOGMPP(R1) : : "r" (x));
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}
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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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#endif /* !__ASSEMBLY__ */
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#endif /* __KERNEL__ */
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#endif /* _ASM_POWERPC_CACHE_H */
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