arch/arm/include/asm/mmu.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef __ARM_MMU_H
   3 #define __ARM_MMU_H
   4
   5 #ifdef CONFIG_MMU
   6
   7 typedef struct {
   8 #ifdef CONFIG_CPU_HAS_ASID
   9         atomic64_t      id;
  10 #else
  11         int             switch_pending;
  12 #endif
  13         unsigned int    vmalloc_seq;
  14         unsigned long   sigpage;
  15 #ifdef CONFIG_VDSO
  16         unsigned long   vdso;
  17 #endif
  18 } mm_context_t;
  19
  20 #ifdef CONFIG_CPU_HAS_ASID
  21 #define ASID_BITS       8
  22 #define ASID_MASK       ((~0ULL) << ASID_BITS)
  23 #define ASID(mm)        ((unsigned int)((mm)->context.id.counter & ~ASID_MASK))
  24 #else
  25 #define ASID(mm)        (0)
  26 #endif
  27
  28 #else
  29
  30 /*
  31  * From nommu.h:
  32  *  Copyright (C) 2002, David McCullough <davidm@snapgear.com>
  33  *  modified for 2.6 by Hyok S. Choi <hyok.choi@samsung.com>
  34  */
  35 typedef struct {
  36         unsigned long   end_brk;
  37 } mm_context_t;
  38
  39 #endif
  40
  41 #endif