blob: 3d2220498abc2db2d98378c94a3309c71e91ccee (
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
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
|
/*
* arch/arm/include/asm/domain.h
*
* Copyright (C) 1999 Russell King.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#ifndef __ASM_PROC_DOMAIN_H
#define __ASM_PROC_DOMAIN_H
#ifndef __ASSEMBLY__
#include <asm/barrier.h>
#endif
/*
* Domain numbers
*
* DOMAIN_IO - domain 2 includes all IO only
* DOMAIN_USER - domain 1 includes all user memory only
* DOMAIN_KERNEL - domain 0 includes all kernel memory only
*
* The domain numbering depends on whether we support 36 physical
* address for I/O or not. Addresses above the 32 bit boundary can
* only be mapped using supersections and supersections can only
* be set for domain 0. We could just default to DOMAIN_IO as zero,
* but there may be systems with supersection support and no 36-bit
* addressing. In such cases, we want to map system memory with
* supersections to reduce TLB misses and footprint.
*
* 36-bit addressing and supersections are only available on
* CPUs based on ARMv6+ or the Intel XSC3 core.
*/
#ifndef CONFIG_IO_36
#define DOMAIN_KERNEL 0
#define DOMAIN_TABLE 0
#define DOMAIN_USER 1
#define DOMAIN_IO 2
#else
#define DOMAIN_KERNEL 2
#define DOMAIN_TABLE 2
#define DOMAIN_USER 1
#define DOMAIN_IO 0
#endif
/*
* Domain types
*/
#define DOMAIN_NOACCESS 0
#define DOMAIN_CLIENT 1
#ifdef CONFIG_CPU_USE_DOMAINS
#define DOMAIN_MANAGER 3
#else
#define DOMAIN_MANAGER 1
#endif
#define domain_val(dom,type) ((type) << (2*(dom)))
#ifndef __ASSEMBLY__
#ifdef CONFIG_CPU_USE_DOMAINS
#define set_domain(x) \
do { \
__asm__ __volatile__( \
"mcr p15, 0, %0, c3, c0 @ set domain" \
: : "r" (x)); \
isb(); \
} while (0)
#define modify_domain(dom,type) \
do { \
struct thread_info *thread = current_thread_info(); \
unsigned int domain = thread->cpu_domain; \
domain &= ~domain_val(dom, DOMAIN_MANAGER); \
thread->cpu_domain = domain | domain_val(dom, type); \
set_domain(thread->cpu_domain); \
} while (0)
#else
#define set_domain(x) do { } while (0)
#define modify_domain(dom,type) do { } while (0)
#endif
/*
* Generate the T (user) versions of the LDR/STR and related
* instructions (inline assembly)
*/
#ifdef CONFIG_CPU_USE_DOMAINS
#define TUSER(instr) #instr "t"
#else
#define TUSER(instr) #instr
#endif
#else /* __ASSEMBLY__ */
/*
* Generate the T (user) versions of the LDR/STR and related
* instructions
*/
#ifdef CONFIG_CPU_USE_DOMAINS
#define TUSER(instr) instr ## t
#else
#define TUSER(instr) instr
#endif
#endif /* __ASSEMBLY__ */
#endif /* !__ASM_PROC_DOMAIN_H */
|
