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
smp_lock_cache(void)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
smp_unlock_cache(unsigned long flags)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
smp_lock_cache(void)63 static inline unsigned long smp_lock_cache(void) { return 0; }
smp_unlock_cache(unsigned long flags)64 static inline void smp_unlock_cache(unsigned long flags) {}
smp_cache_call(unsigned long opr_mask,unsigned long addr,unsigned long end)65 static inline void smp_cache_call(unsigned long opr_mask,
66 unsigned long addr, unsigned long end)
67 {
68 }
69 #endif /* CONFIG_SMP */
70