Merge branch 'drm-intel-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/ickle...
[pandora-kernel.git] / arch / mn10300 / mm / cache-smp.h
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 */