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 } 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  */
  31 typedef struct {
  32         unsigned long   end_brk;
  33 } mm_context_t;
  34
  35 #endif
  36
  37 #endif