| 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 | #include <Availability.h>␊ |
| 31 | ␊ |
| 32 | __BEGIN_DECLS␊ |
| 33 | ␊ |
| 34 | ␊ |
| 35 | /* Functions performed by sys_cache_control(): */␊ |
| 36 | ␊ |
| 37 | /* Prepare memory for execution. This should be called␊ |
| 38 | * after writing machine instructions to memory, before␊ |
| 39 | * executing them. It syncs the dcache and icache.␊ |
| 40 | * On IA32 processors this function is a NOP, because␊ |
| 41 | * no synchronization is required.␊ |
| 42 | */␊ |
| 43 | #define␉kCacheFunctionPrepareForExecution␉1␊ |
| 44 | ␊ |
| 45 | /* Flush data cache(s). This ensures that cached data ␊ |
| 46 | * makes it all the way out to DRAM, and then removes␊ |
| 47 | * copies of the data from all processor caches.␊ |
| 48 | * It can be useful when dealing with cache incoherent␊ |
| 49 | * devices or DMA.␊ |
| 50 | */␊ |
| 51 | #define␉kCacheFunctionFlushDcache␉2␊ |
| 52 | ␊ |
| 53 | ␊ |
| 54 | /* perform one of the above cache functions: */␊ |
| 55 | int␉sys_cache_control( int function, void *start, size_t len);␊ |
| 56 | ␊ |
| 57 | /* equivalent to sys_cache_control(kCacheFunctionPrepareForExecution): */␊ |
| 58 | void␉sys_icache_invalidate( void *start, size_t len);␊ |
| 59 | ␊ |
| 60 | /* equivalent to sys_cache_control(kCacheFunctionFlushDcache): */␊ |
| 61 | void␉sys_dcache_flush( void *start, size_t len) __OSX_AVAILABLE_STARTING(__MAC_10_5, __IPHONE_2_0);␊ |
| 62 | ␊ |
| 63 | ␊ |
| 64 | __END_DECLS␊ |
| 65 | ␊ |
| 66 | #endif /* _OS_CACHE_CONTROL_H_ */␊ |
| 67 | |
