arch/powerpc/include/asm/cache.h

   1 #ifndef _ASM_POWERPC_CACHE_H
   2 #define _ASM_POWERPC_CACHE_H
   3
   4 #ifdef __KERNEL__
   5
   6 #include <asm/reg.h>
   7
   8 /* bytes per L1 cache line */
   9 #if defined(CONFIG_8xx) || defined(CONFIG_403GCX)
  10 #define L1_CACHE_SHIFT          4
  11 #define MAX_COPY_PREFETCH       1
  12 #elif defined(CONFIG_PPC_E500MC)
  13 #define L1_CACHE_SHIFT          6
  14 #define MAX_COPY_PREFETCH       4
  15 #elif defined(CONFIG_PPC32)
  16 #define MAX_COPY_PREFETCH       4
  17 #if defined(CONFIG_PPC_47x)
  18 #define L1_CACHE_SHIFT          7
  19 #else
  20 #define L1_CACHE_SHIFT          5
  21 #endif
  22 #else /* CONFIG_PPC64 */
  23 #define L1_CACHE_SHIFT          7
  24 #endif
  25
  26 #define L1_CACHE_BYTES          (1 << L1_CACHE_SHIFT)
  27
  28 #define SMP_CACHE_BYTES         L1_CACHE_BYTES
  29
  30 #if defined(__powerpc64__) && !defined(__ASSEMBLY__)
  31 struct ppc64_caches {
  32         u32     dsize;                  /* L1 d-cache size */
  33         u32     dline_size;             /* L1 d-cache line size */
  34         u32     log_dline_size;
  35         u32     dlines_per_page;
  36         u32     isize;                  /* L1 i-cache size */
  37         u32     iline_size;             /* L1 i-cache line size */
  38         u32     log_iline_size;
  39         u32     ilines_per_page;
  40 };
  41
  42 extern struct ppc64_caches ppc64_caches;
  43
  44 static inline void logmpp(u64 x)
  45 {
  46         asm volatile(PPC_LOGMPP(R1) : : "r" (x));
  47 }
  48
  49 #endif /* __powerpc64__ && ! __ASSEMBLY__ */
  50
  51 #if defined(__ASSEMBLY__)
  52 /*
  53  * For a snooping icache, we still need a dummy icbi to purge all the
  54  * prefetched instructions from the ifetch buffers. We also need a sync
  55  * before the icbi to order the the actual stores to memory that might
  56  * have modified instructions with the icbi.
  57  */
  58 #define PURGE_PREFETCHED_INS    \
  59         sync;                   \
  60         icbi    0,r3;           \
  61         sync;                   \
  62         isync
  63
  64 #else
  65 #define __read_mostly __attribute__((__section__(".data..read_mostly")))
  66
  67 #ifdef CONFIG_6xx
  68 extern long _get_L2CR(void);
  69 extern long _get_L3CR(void);
  70 extern void _set_L2CR(unsigned long);
  71 extern void _set_L3CR(unsigned long);
  72 #else
  73 #define _get_L2CR()     0L
  74 #define _get_L3CR()     0L
  75 #define _set_L2CR(val)  do { } while(0)
  76 #define _set_L3CR(val)  do { } while(0)
  77 #endif
  78
  79 #endif /* !__ASSEMBLY__ */
  80 #endif /* __KERNEL__ */
  81 #endif /* _ASM_POWERPC_CACHE_H */