ia64/linux-2.6.18-xen.hg

view include/asm-arm/domain.h @ 782:9ab1c319531f

merge with linux-2.6.18-xen.hg
author Isaku Yamahata <yamahata@valinux.co.jp>
date Wed Jan 28 13:07:23 2009 +0900 (2009-01-28)
parents 831230e53067
children
line source
1 /*
2 * linux/include/asm-arm/domain.h
3 *
4 * Copyright (C) 1999 Russell King.
5 *
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.
9 */
10 #ifndef __ASM_PROC_DOMAIN_H
11 #define __ASM_PROC_DOMAIN_H
13 /*
14 * Domain numbers
15 *
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
19 *
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.
27 *
28 * 36-bit addressing and supersections are only available on
29 * CPUs based on ARMv6+ or the Intel XSC3 core.
30 */
31 #ifndef CONFIG_IO_36
32 #define DOMAIN_KERNEL 0
33 #define DOMAIN_TABLE 0
34 #define DOMAIN_USER 1
35 #define DOMAIN_IO 2
36 #else
37 #define DOMAIN_KERNEL 2
38 #define DOMAIN_TABLE 2
39 #define DOMAIN_USER 1
40 #define DOMAIN_IO 0
41 #endif
43 /*
44 * Domain types
45 */
46 #define DOMAIN_NOACCESS 0
47 #define DOMAIN_CLIENT 1
48 #define DOMAIN_MANAGER 3
50 #define domain_val(dom,type) ((type) << (2*(dom)))
52 #ifndef __ASSEMBLY__
54 #ifdef CONFIG_MMU
55 #define set_domain(x) \
56 do { \
57 __asm__ __volatile__( \
58 "mcr p15, 0, %0, c3, c0 @ set domain" \
59 : : "r" (x)); \
60 } while (0)
62 #define modify_domain(dom,type) \
63 do { \
64 struct thread_info *thread = current_thread_info(); \
65 unsigned int domain = thread->cpu_domain; \
66 domain &= ~domain_val(dom, DOMAIN_MANAGER); \
67 thread->cpu_domain = domain | domain_val(dom, type); \
68 set_domain(thread->cpu_domain); \
69 } while (0)
71 #else
72 #define set_domain(x) do { } while (0)
73 #define modify_domain(dom,type) do { } while (0)
74 #endif
76 #endif
77 #endif /* !__ASSEMBLY__ */