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 atomic_t vmalloc_seq;
14 unsigned long sigpage;
15 #ifdef CONFIG_VDSO
16 unsigned long vdso;
17 #endif
18 #ifdef CONFIG_BINFMT_ELF_FDPIC
19 unsigned long exec_fdpic_loadmap;
20 unsigned long interp_fdpic_loadmap;
21 #endif
22 } mm_context_t;
23
24 #ifdef CONFIG_CPU_HAS_ASID
25 #define ASID_BITS 8
26 #define ASID_MASK ((~0ULL) << ASID_BITS)
27 #define ASID(mm) ((unsigned int)((mm)->context.id.counter & ~ASID_MASK))
28 #else
29 #define ASID(mm) (0)
30 #endif
31
32 #else
33
34 /*
35 * From nommu.h:
36 * Copyright (C) 2002, David McCullough <davidm@snapgear.com>
37 * modified for 2.6 by Hyok S. Choi <hyok.choi@samsung.com>
38 */
39 typedef struct {
40 unsigned long end_brk;
41 #ifdef CONFIG_BINFMT_ELF_FDPIC
42 unsigned long exec_fdpic_loadmap;
43 unsigned long interp_fdpic_loadmap;
44 #endif
45 } mm_context_t;
46
47 #endif
48
49 #endif
50
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