2
* arch/arm/include/asm/domain.h
4
* Copyright (C) 1999 Russell King.
6
* This program is free software; you can redistribute it and/or modify
7
* it under the terms of the GNU General Public License version 2 as
8
* published by the Free Software Foundation.
10
#ifndef __ASM_PROC_DOMAIN_H
11
#define __ASM_PROC_DOMAIN_H
16
* DOMAIN_IO - domain 2 includes all IO only
17
* DOMAIN_USER - domain 1 includes all user memory only
18
* DOMAIN_KERNEL - domain 0 includes all kernel memory only
20
* The domain numbering depends on whether we support 36 physical
21
* address for I/O or not. Addresses above the 32 bit boundary can
22
* only be mapped using supersections and supersections can only
23
* be set for domain 0. We could just default to DOMAIN_IO as zero,
24
* but there may be systems with supersection support and no 36-bit
25
* addressing. In such cases, we want to map system memory with
26
* supersections to reduce TLB misses and footprint.
28
* 36-bit addressing and supersections are only available on
29
* CPUs based on ARMv6+ or the Intel XSC3 core.
32
#define DOMAIN_KERNEL 0
33
#define DOMAIN_TABLE 0
37
#define DOMAIN_KERNEL 2
38
#define DOMAIN_TABLE 2
46
#define DOMAIN_NOACCESS 0
47
#define DOMAIN_CLIENT 1
48
#ifdef CONFIG_CPU_USE_DOMAINS
49
#define DOMAIN_MANAGER 3
51
#define DOMAIN_MANAGER 1
54
#define domain_val(dom,type) ((type) << (2*(dom)))
58
#ifdef CONFIG_CPU_USE_DOMAINS
59
#define set_domain(x) \
61
__asm__ __volatile__( \
62
"mcr p15, 0, %0, c3, c0 @ set domain" \
67
#define modify_domain(dom,type) \
69
struct thread_info *thread = current_thread_info(); \
70
unsigned int domain = thread->cpu_domain; \
71
domain &= ~domain_val(dom, DOMAIN_MANAGER); \
72
thread->cpu_domain = domain | domain_val(dom, type); \
73
set_domain(thread->cpu_domain); \
77
#define set_domain(x) do { } while (0)
78
#define modify_domain(dom,type) do { } while (0)
82
* Generate the T (user) versions of the LDR/STR and related
83
* instructions (inline assembly)
85
#ifdef CONFIG_CPU_USE_DOMAINS
86
#define T(instr) #instr "t"
88
#define T(instr) #instr
91
#else /* __ASSEMBLY__ */
94
* Generate the T (user) versions of the LDR/STR and related
97
#ifdef CONFIG_CPU_USE_DOMAINS
98
#define T(instr) instr ## t
100
#define T(instr) instr
103
#endif /* __ASSEMBLY__ */
105
#endif /* !__ASM_PROC_DOMAIN_H */