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