OSCacheControl.h (2344B) - Raw
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) __OSX_AVAILABLE_STARTING(__MAC_10_5, __IPHONE_2_0); 56 57 /* equivalent to sys_cache_control(kCacheFunctionPrepareForExecution): */ 58 void sys_icache_invalidate( void *start, size_t len) __OSX_AVAILABLE_STARTING(__MAC_10_5, __IPHONE_2_0); 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_ */