include/asm-sh/cache.h

   1 /* $Id: cache.h,v 1.6 2004/03/11 18:08:05 lethal Exp $
   2  *
   3  * include/asm-sh/cache.h
   4  *
   5  * Copyright 1999 (C) Niibe Yutaka
   6  * Copyright 2002, 2003 (C) Paul Mundt
   7  */
   8 #ifndef __ASM_SH_CACHE_H
   9 #define __ASM_SH_CACHE_H
  10 #ifdef __KERNEL__
  11
  12 #include <linux/init.h>
  13 #include <asm/cpu/cache.h>
  14
  15 #define SH_CACHE_VALID          1
  16 #define SH_CACHE_UPDATED        2
  17 #define SH_CACHE_COMBINED       4
  18 #define SH_CACHE_ASSOC          8
  19
  20 #define L1_CACHE_BYTES          (1 << L1_CACHE_SHIFT)
  21
  22 #define __read_mostly __attribute__((__section__(".data.read_mostly")))
  23
  24 #ifndef __ASSEMBLY__
  25 struct cache_info {
  26         unsigned int ways;              /* Number of cache ways */
  27         unsigned int sets;              /* Number of cache sets */
  28         unsigned int linesz;            /* Cache line size (bytes) */
  29
  30         unsigned int way_size;          /* sets * line size */
  31
  32         /*
  33          * way_incr is the address offset for accessing the next way
  34          * in memory mapped cache array ops.
  35          */
  36         unsigned int way_incr;
  37         unsigned int entry_shift;
  38         unsigned int entry_mask;
  39
  40         /*
  41          * Compute a mask which selects the address bits which overlap between
  42          * 1. those used to select the cache set during indexing
  43          * 2. those in the physical page number.
  44          */
  45         unsigned int alias_mask;
  46
  47         unsigned int n_aliases;         /* Number of aliases */
  48
  49         unsigned long flags;
  50 };
  51
  52 int __init detect_cpu_and_cache_system(void);
  53
  54 #endif /* __ASSEMBLY__ */
  55 #endif /* __KERNEL__ */
  56 #endif /* __ASM_SH_CACHE_H */