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
42enum {
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
52extern void          mtrr_init(void);
53extern kern_return_t mtrr_update_cpu(void);
54extern kern_return_t mtrr_update_all_cpus(void);
55
56extern kern_return_t mtrr_range_add(	addr64_t phys_addr,
57					uint64_t length,
58					uint32_t mem_type);
59
60extern kern_return_t mtrr_range_remove(	addr64_t phys_addr,
61					uint64_t length,
62					uint32_t mem_type);
63
64extern void          pat_init(void);
65
66__END_DECLS
67
68#endif /* __APPLE_API_PRIVATE */
69
70#endif /* !_I386_MTRR_H_ */
71