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1/*
2 * Copyright (c) 2006 Apple Computer, Inc. All rights reserved.
3 *
4 * @APPLE_LICENSE_HEADER_START@
5 *
6 * This file contains Original Code and/or Modifications of Original Code
7 * as defined in and that are subject to the Apple Public Source License
8 * Version 2.0 (the 'License'). You may not use this file except in
9 * compliance with the License. Please obtain a copy of the License at
10 * http://www.opensource.apple.com/apsl/ and read it before using this
11 * file.
12 *
13 * The Original Code and all software distributed under the License are
14 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
15 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
16 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
18 * Please see the License for the specific language governing rights and
19 * limitations under the License.
20 *
21 * @APPLE_LICENSE_HEADER_END@
22 */
23
24#ifndef _OS_CACHE_CONTROL_H_
25#define _OS_CACHE_CONTROL_H_
26
27#include <stddef.h>
28#include <sys/cdefs.h>
29#include <stdint.h>
30
31__BEGIN_DECLS
32
33
34/* Functions performed by sys_cache_control(): */
35
36/* Prepare memory for execution. This should be called
37 * after writing machine instructions to memory, before
38 * executing them. It syncs the dcache and icache.
39 * On IA32 processors this function is a NOP, because
40 * no synchronization is required.
41 */
42#definekCacheFunctionPrepareForExecution1
43
44/* Flush data cache(s). This ensures that cached data
45 * makes it all the way out to DRAM, and then removes
46 * copies of the data from all processor caches.
47 * It can be useful when dealing with cache incoherent
48 * devices or DMA.
49 */
50#definekCacheFunctionFlushDcache2
51
52
53/* perform one of the above cache functions: */
54intsys_cache_control( int function, void *start, size_t len);
55
56/* equivalent to sys_cache_control(kCacheFunctionPrepareForExecution): */
57voidsys_icache_invalidate( void *start, size_t len);
58
59/* equivalent to sys_cache_control(kCacheFunctionFlushDcache): */
60voidsys_dcache_flush( void *start, size_t len);
61
62
63__END_DECLS
64
65#endif /* _OS_CACHE_CONTROL_H_ */
66

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