LXR linux/arch/powerpc/include/asm/cache.h

   1#ifndef _ASM_POWERPC_CACHE_H
   2#define _ASM_POWERPC_CACHE_H
   3
   4#ifdef __KERNEL__
   5
   6
   7/* bytes per L1 cache line */
   8#if defined(CONFIG_8xx) || defined(CONFIG_403GCX)
   9#define L1_CACHE_SHIFT          4
  10#define MAX_COPY_PREFETCH       1
  11#elif defined(CONFIG_PPC_E500MC)
  12#define L1_CACHE_SHIFT          6
  13#define MAX_COPY_PREFETCH       4
  14#elif defined(CONFIG_PPC32)
  15#define MAX_COPY_PREFETCH       4
  16#if defined(CONFIG_PPC_47x)
  17#define L1_CACHE_SHIFT          7
  18#else
  19#define L1_CACHE_SHIFT          5
  20#endif
  21#else /* CONFIG_PPC64 */
  22#define L1_CACHE_SHIFT          7
  23#endif
  24
  25#define L1_CACHE_BYTES          (1 << L1_CACHE_SHIFT)
  26
  27#define SMP_CACHE_BYTES         L1_CACHE_BYTES
  28
  29#if defined(__powerpc64__) && !defined(__ASSEMBLY__)
  30struct ppc64_caches {
  31        u32     dsize;                  /* L1 d-cache size */
  32        u32     dline_size;             /* L1 d-cache line size */
  33        u32     log_dline_size;
  34        u32     dlines_per_page;
  35        u32     isize;                  /* L1 i-cache size */
  36        u32     iline_size;             /* L1 i-cache line size */
  37        u32     log_iline_size;
  38        u32     ilines_per_page;
  39};
  40
  41extern struct ppc64_caches ppc64_caches;
  42#endif /* __powerpc64__ && ! __ASSEMBLY__ */
  43
  44#if !defined(__ASSEMBLY__)
  45
  46#define __read_mostly __attribute__((__section__(".data..read_mostly")))
  47
  48#ifdef CONFIG_6xx
  49extern long _get_L2CR(void);
  50extern long _get_L3CR(void);
  51extern void _set_L2CR(unsigned long);
  52extern void _set_L3CR(unsigned long);
  53#else
  54#define _get_L2CR()     0L
  55#define _get_L3CR()     0L
  56#define _set_L2CR(val)  do { } while(0)
  57#define _set_L3CR(val)  do { } while(0)
  58#endif
  59
  60extern void cacheable_memzero(void *p, unsigned int nb);
  61extern void *cacheable_memcpy(void *, const void *, unsigned int);
  62
  63#endif /* !__ASSEMBLY__ */
  64#endif /* __KERNEL__ */
  65#endif /* _ASM_POWERPC_CACHE_H */
  66