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         unsigned int id;
   9         spinlock_t id_lock;
  10 #endif
  11         unsigned int kvm_seq;
  12 } mm_context_t;
  13
  14 #ifdef CONFIG_CPU_HAS_ASID
  15 #define ASID(mm)        ((mm)->context.id & 255)
  16
  17 /* init_mm.context.id_lock should be initialized. */
  18 #define INIT_MM_CONTEXT(name)                                                 \
  19         .context.id_lock    = __SPIN_LOCK_UNLOCKED(name.context.id_lock),
  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