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 */
18enum 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
25enum 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
43extern spinlock_t smp_cache_lock;
44
45extern void smp_cache_call(unsigned long opr_mask,
46			   unsigned long addr, unsigned long end);
47
48static 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
56static 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
63static inline unsigned long smp_lock_cache(void) { return 0; }
64static inline void smp_unlock_cache(unsigned long flags) {}
65static inline void smp_cache_call(unsigned long opr_mask,
66				  unsigned long addr, unsigned long end)
67{
68}
69#endif /* CONFIG_SMP */
70