arch/sh/include/asm/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 <cpu/cache.h>
  14
  15 #define L1_CACHE_BYTES          (1 << L1_CACHE_SHIFT)
  16
  17 #define __read_mostly __attribute__((__section__(".data.read_mostly")))
  18
  19 #ifndef __ASSEMBLY__
  20 struct cache_info {
  21         unsigned int ways;              /* Number of cache ways */
  22         unsigned int sets;              /* Number of cache sets */
  23         unsigned int linesz;            /* Cache line size (bytes) */
  24
  25         unsigned int way_size;          /* sets * line size */
  26
  27         /*
  28          * way_incr is the address offset for accessing the next way
  29          * in memory mapped cache array ops.
  30          */
  31         unsigned int way_incr;
  32         unsigned int entry_shift;
  33         unsigned int entry_mask;
  34
  35         /*
  36          * Compute a mask which selects the address bits which overlap between
  37          * 1. those used to select the cache set during indexing
  38          * 2. those in the physical page number.
  39          */
  40         unsigned int alias_mask;
  41
  42         unsigned int n_aliases;         /* Number of aliases */
  43
  44         unsigned long flags;
  45 };
  46
  47 int __init detect_cpu_and_cache_system(void);
  48
  49 #endif /* __ASSEMBLY__ */
  50 #endif /* __KERNEL__ */
  51 #endif /* __ASM_SH_CACHE_H */