summaryrefslogtreecommitdiffstats
path: root/arch/arm/include/asm/mmu.h
blob: e049723840d3298a42f6b3c39b9ac558fee1857d (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __ARM_MMU_H
#define __ARM_MMU_H

#ifdef CONFIG_MMU

typedef struct {
#ifdef CONFIG_CPU_HAS_ASID
	atomic64_t	id;
#else
	int		switch_pending;
#endif
	atomic_t	vmalloc_seq;
	unsigned long	sigpage;
#ifdef CONFIG_VDSO
	unsigned long	vdso;
#endif
#ifdef CONFIG_BINFMT_ELF_FDPIC
	unsigned long	exec_fdpic_loadmap;
	unsigned long	interp_fdpic_loadmap;
#endif
} mm_context_t;

#ifdef CONFIG_CPU_HAS_ASID
#define ASID_BITS	8
#define ASID_MASK	((~0ULL) << ASID_BITS)
#define ASID(mm)	((unsigned int)((mm)->context.id.counter & ~ASID_MASK))
#else
#define ASID(mm)	(0)
#endif

#else

/*
 * From nommu.h:
 *  Copyright (C) 2002, David McCullough <davidm@snapgear.com>
 *  modified for 2.6 by Hyok S. Choi <hyok.choi@samsung.com>
 */
typedef struct {
	unsigned long	end_brk;
#ifdef CONFIG_BINFMT_ELF_FDPIC
	unsigned long	exec_fdpic_loadmap;
	unsigned long	interp_fdpic_loadmap;
#endif
} mm_context_t;

#endif

#endif