arch/arm/include/asm/mmu.h

   1 #ifndef __ARM_MMU_H
   2 #define __ARM_MMU_H
   3
   4 #ifdef CONFIG_MMU
   5
   6 typedef 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 #ifdef CONFIG_VDSO
  15         unsigned long   vdso;
  16 #endif
  17 } mm_context_t;
  18
  19 #ifdef CONFIG_CPU_HAS_ASID
  20 #define ASID_BITS       8
  21 #define ASID_MASK       ((~0ULL) << ASID_BITS)
  22 #define ASID(mm)        ((unsigned int)((mm)->context.id.counter & ~ASID_MASK))
  23 #else
  24 #define ASID(mm)        (0)
  25 #endif
  26
  27 #else
  28
  29 /*
  30  * From nommu.h:
  31  *  Copyright (C) 2002, David McCullough <davidm@snapgear.com>
  32  *  modified for 2.6 by Hyok S. Choi <hyok.choi@samsung.com>
  33  */
  34 typedef struct {
  35         unsigned long   end_brk;
  36 } mm_context_t;
  37
  38 #endif
  39
  40 #endif