Merge tag 'char-misc-4.15-rc1' of ssh://gitolite.kernel.org/pub/scm/linux/kernel...
[sfrench/cifs-2.6.git] / 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