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8be06289 AT |
1 | /* SMP caching definitions |
2 | * | |
3 | * Copyright (C) 2010 Red Hat, Inc. All Rights Reserved. | |
4 | * Written by David Howells (dhowells@redhat.com) | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or | |
7 | * modify it under the terms of the GNU General Public Licence | |
8 | * as published by the Free Software Foundation; either version | |
9 | * 2 of the Licence, or (at your option) any later version. | |
10 | */ | |
11 | ||
12 | ||
13 | /* | |
14 | * Operation requests for smp_cache_call(). | |
15 | * | |
16 | * One of smp_icache_ops and one of smp_dcache_ops can be OR'd together. | |
17 | */ | |
18 | enum smp_icache_ops { | |
19 | SMP_ICACHE_NOP = 0x0000, | |
20 | SMP_ICACHE_INV = 0x0001, | |
21 | SMP_ICACHE_INV_RANGE = 0x0002, | |
22 | }; | |
23 | #define SMP_ICACHE_OP_MASK 0x0003 | |
24 | ||
25 | enum smp_dcache_ops { | |
26 | SMP_DCACHE_NOP = 0x0000, | |
27 | SMP_DCACHE_INV = 0x0004, | |
28 | SMP_DCACHE_INV_RANGE = 0x0008, | |
29 | SMP_DCACHE_FLUSH = 0x000c, | |
30 | SMP_DCACHE_FLUSH_RANGE = 0x0010, | |
31 | SMP_DCACHE_FLUSH_INV = 0x0014, | |
32 | SMP_DCACHE_FLUSH_INV_RANGE = 0x0018, | |
33 | }; | |
34 | #define SMP_DCACHE_OP_MASK 0x001c | |
35 | ||
36 | #define SMP_IDCACHE_INV_FLUSH (SMP_ICACHE_INV | SMP_DCACHE_FLUSH) | |
37 | #define SMP_IDCACHE_INV_FLUSH_RANGE (SMP_ICACHE_INV_RANGE | SMP_DCACHE_FLUSH_RANGE) | |
38 | ||
39 | /* | |
40 | * cache-smp.c | |
41 | */ | |
42 | #ifdef CONFIG_SMP | |
43 | extern spinlock_t smp_cache_lock; | |
44 | ||
45 | extern void smp_cache_call(unsigned long opr_mask, | |
46 | unsigned long addr, unsigned long end); | |
47 | ||
48 | static inline unsigned long smp_lock_cache(void) | |
49 | __acquires(&smp_cache_lock) | |
50 | { | |
51 | unsigned long flags; | |
52 | spin_lock_irqsave(&smp_cache_lock, flags); | |
53 | return flags; | |
54 | } | |
55 | ||
56 | static inline void smp_unlock_cache(unsigned long flags) | |
57 | __releases(&smp_cache_lock) | |
58 | { | |
59 | spin_unlock_irqrestore(&smp_cache_lock, flags); | |
60 | } | |
61 | ||
62 | #else | |
63 | static inline unsigned long smp_lock_cache(void) { return 0; } | |
64 | static inline void smp_unlock_cache(unsigned long flags) {} | |
65 | static inline void smp_cache_call(unsigned long opr_mask, | |
66 | unsigned long addr, unsigned long end) | |
67 | { | |
68 | } | |
69 | #endif /* CONFIG_SMP */ |