LXR linux/arch/arm/include/asm/mmu.h

   1#ifndef __ARM_MMU_H
   2#define __ARM_MMU_H
   3
   4#ifdef CONFIG_MMU
   5
   6typedef struct {
   7#ifdef CONFIG_CPU_HAS_ASID
   8        atomic64_t      id;
   9#else
  10        int             switch_pending;
  11#endif
  12        unsigned int    vmalloc_seq;
  13        unsigned long   sigpage;
  14} mm_context_t;
  15
  16#ifdef CONFIG_CPU_HAS_ASID
  17#define ASID_BITS       8
  18#define ASID_MASK       ((~0ULL) << ASID_BITS)
  19#define ASID(mm)        ((unsigned int)((mm)->context.id.counter & ~ASID_MASK))
  20#else
  21#define ASID(mm)        (0)
  22#endif
  23
  24#else
  25
  26/*
  27 * From nommu.h:
  28 *  Copyright (C) 2002, David McCullough <davidm@snapgear.com>
  29 *  modified for 2.6 by Hyok S. Choi <hyok.choi@samsung.com>
  30 */
  31typedef struct {
  32        unsigned long   end_brk;
  33} mm_context_t;
  34
  35#endif
  36
  37#endif
  38