Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
Russell King | 4baa992 | 2008-08-02 10:55:55 +0100 | [diff] [blame] | 2 | * arch/arm/include/asm/domain.h |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 |
| 12 | |
David Howells | 9f97da7 | 2012-03-28 18:30:01 +0100 | [diff] [blame^] | 13 | #ifndef __ASSEMBLY__ |
| 14 | #include <asm/barrier.h> |
| 15 | #endif |
| 16 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 17 | /* |
| 18 | * Domain numbers |
| 19 | * |
| 20 | * DOMAIN_IO - domain 2 includes all IO only |
| 21 | * DOMAIN_USER - domain 1 includes all user memory only |
| 22 | * DOMAIN_KERNEL - domain 0 includes all kernel memory only |
Lennert Buytenhek | 23bdf86 | 2006-03-28 21:00:40 +0100 | [diff] [blame] | 23 | * |
| 24 | * The domain numbering depends on whether we support 36 physical |
| 25 | * address for I/O or not. Addresses above the 32 bit boundary can |
| 26 | * only be mapped using supersections and supersections can only |
| 27 | * be set for domain 0. We could just default to DOMAIN_IO as zero, |
| 28 | * but there may be systems with supersection support and no 36-bit |
| 29 | * addressing. In such cases, we want to map system memory with |
| 30 | * supersections to reduce TLB misses and footprint. |
| 31 | * |
| 32 | * 36-bit addressing and supersections are only available on |
| 33 | * CPUs based on ARMv6+ or the Intel XSC3 core. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 34 | */ |
Lennert Buytenhek | 23bdf86 | 2006-03-28 21:00:40 +0100 | [diff] [blame] | 35 | #ifndef CONFIG_IO_36 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 36 | #define DOMAIN_KERNEL 0 |
| 37 | #define DOMAIN_TABLE 0 |
| 38 | #define DOMAIN_USER 1 |
| 39 | #define DOMAIN_IO 2 |
Lennert Buytenhek | 23bdf86 | 2006-03-28 21:00:40 +0100 | [diff] [blame] | 40 | #else |
| 41 | #define DOMAIN_KERNEL 2 |
| 42 | #define DOMAIN_TABLE 2 |
| 43 | #define DOMAIN_USER 1 |
| 44 | #define DOMAIN_IO 0 |
| 45 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 46 | |
| 47 | /* |
| 48 | * Domain types |
| 49 | */ |
| 50 | #define DOMAIN_NOACCESS 0 |
| 51 | #define DOMAIN_CLIENT 1 |
Catalin Marinas | 247055a | 2010-09-13 16:03:21 +0100 | [diff] [blame] | 52 | #ifdef CONFIG_CPU_USE_DOMAINS |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 53 | #define DOMAIN_MANAGER 3 |
Catalin Marinas | 247055a | 2010-09-13 16:03:21 +0100 | [diff] [blame] | 54 | #else |
| 55 | #define DOMAIN_MANAGER 1 |
| 56 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 57 | |
| 58 | #define domain_val(dom,type) ((type) << (2*(dom))) |
| 59 | |
| 60 | #ifndef __ASSEMBLY__ |
Russell King | 002547b | 2006-06-20 20:46:52 +0100 | [diff] [blame] | 61 | |
Catalin Marinas | 247055a | 2010-09-13 16:03:21 +0100 | [diff] [blame] | 62 | #ifdef CONFIG_CPU_USE_DOMAINS |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 63 | #define set_domain(x) \ |
| 64 | do { \ |
| 65 | __asm__ __volatile__( \ |
| 66 | "mcr p15, 0, %0, c3, c0 @ set domain" \ |
| 67 | : : "r" (x)); \ |
Catalin Marinas | 620879c | 2007-02-05 14:47:46 +0100 | [diff] [blame] | 68 | isb(); \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 69 | } while (0) |
| 70 | |
| 71 | #define modify_domain(dom,type) \ |
| 72 | do { \ |
| 73 | struct thread_info *thread = current_thread_info(); \ |
| 74 | unsigned int domain = thread->cpu_domain; \ |
| 75 | domain &= ~domain_val(dom, DOMAIN_MANAGER); \ |
| 76 | thread->cpu_domain = domain | domain_val(dom, type); \ |
| 77 | set_domain(thread->cpu_domain); \ |
| 78 | } while (0) |
| 79 | |
Russell King | 002547b | 2006-06-20 20:46:52 +0100 | [diff] [blame] | 80 | #else |
| 81 | #define set_domain(x) do { } while (0) |
| 82 | #define modify_domain(dom,type) do { } while (0) |
| 83 | #endif |
| 84 | |
Catalin Marinas | 247055a | 2010-09-13 16:03:21 +0100 | [diff] [blame] | 85 | /* |
| 86 | * Generate the T (user) versions of the LDR/STR and related |
| 87 | * instructions (inline assembly) |
| 88 | */ |
| 89 | #ifdef CONFIG_CPU_USE_DOMAINS |
Catalin Marinas | 4e7682d | 2012-01-25 11:38:13 +0100 | [diff] [blame] | 90 | #define TUSER(instr) #instr "t" |
Catalin Marinas | 247055a | 2010-09-13 16:03:21 +0100 | [diff] [blame] | 91 | #else |
Catalin Marinas | 4e7682d | 2012-01-25 11:38:13 +0100 | [diff] [blame] | 92 | #define TUSER(instr) #instr |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 93 | #endif |
Catalin Marinas | 247055a | 2010-09-13 16:03:21 +0100 | [diff] [blame] | 94 | |
| 95 | #else /* __ASSEMBLY__ */ |
| 96 | |
| 97 | /* |
| 98 | * Generate the T (user) versions of the LDR/STR and related |
| 99 | * instructions |
| 100 | */ |
| 101 | #ifdef CONFIG_CPU_USE_DOMAINS |
Catalin Marinas | 4e7682d | 2012-01-25 11:38:13 +0100 | [diff] [blame] | 102 | #define TUSER(instr) instr ## t |
Catalin Marinas | 247055a | 2010-09-13 16:03:21 +0100 | [diff] [blame] | 103 | #else |
Catalin Marinas | 4e7682d | 2012-01-25 11:38:13 +0100 | [diff] [blame] | 104 | #define TUSER(instr) instr |
Catalin Marinas | 247055a | 2010-09-13 16:03:21 +0100 | [diff] [blame] | 105 | #endif |
| 106 | |
| 107 | #endif /* __ASSEMBLY__ */ |
| 108 | |
| 109 | #endif /* !__ASM_PROC_DOMAIN_H */ |