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__)
  30 struct 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
  41 extern 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
  49 extern long _get_L2CR(void);
  50 extern long _get_L3CR(void);
  51 extern void _set_L2CR(unsigned long);
  52 extern 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
  60 extern void cacheable_memzero(void *p, unsigned int nb);
  61 extern void *cacheable_memcpy(void *, const void *, unsigned int);
  62
  63 #endif /* !__ASSEMBLY__ */
  64 #endif /* __KERNEL__ */
  65 #endif /* _ASM_POWERPC_CACHE_H */