1 /* 2 * Copyright (c) 2000-2003 Apple Computer, Inc. All rights reserved. 3 * 4 * @APPLE_OSREFERENCE_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. The rights granted to you under the License 10 * may not be used to create, or enable the creation or redistribution of, 11 * unlawful or unlicensed copies of an Apple operating system, or to 12 * circumvent, violate, or enable the circumvention or violation of, any 13 * terms of an Apple operating system software license agreement. 14 * 15 * Please obtain a copy of the License at 16 * http://www.opensource.apple.com/apsl/ and read it before using this file. 17 * 18 * The Original Code and all software distributed under the License are 19 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER 20 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, 21 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, 22 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. 23 * Please see the License for the specific language governing rights and 24 * limitations under the License. 25 * 26 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ 27 */ 28 29 #ifndef _I386_MTRR_H_ 30 #define _I386_MTRR_H_ 31 32 /* 33 * Memory type range register (MTRR) support. 34 */ 35 36 #include <mach/std_types.h> 37 #include <sys/appleapiopts.h> 38 #include <sys/cdefs.h> 39 40 #ifdef __APPLE_API_PRIVATE 41 42 enum { 43 MTRR_TYPE_UNCACHEABLE = 0, 44 MTRR_TYPE_WRITECOMBINE = 1, 45 MTRR_TYPE_WRITETHROUGH = 4, 46 MTRR_TYPE_WRITEPROTECT = 5, 47 MTRR_TYPE_WRITEBACK = 6 48 }; 49 50 __BEGIN_DECLS 51 52 extern void mtrr_init(void); 53 extern kern_return_t mtrr_update_cpu(void); 54 extern kern_return_t mtrr_update_all_cpus(void); 55 56 extern kern_return_t mtrr_range_add( addr64_t phys_addr, 57 uint64_t length, 58 uint32_t mem_type); 59 60 extern kern_return_t mtrr_range_remove( addr64_t phys_addr, 61 uint64_t length, 62 uint32_t mem_type); 63 64 extern void pat_init(void); 65 66 __END_DECLS 67 68 #endif /* __APPLE_API_PRIVATE */ 69 70 #endif /* !_I386_MTRR_H_ */ 71