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