LXR linux/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
   7typedef 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 */
  35typedef struct {
  36        unsigned long   end_brk;
  37} mm_context_t;
  38
  39#endif
  40
  41#endif
  42