1/*
2 * Copyright (c) 2000-2009 Apple 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 * @OSF_COPYRIGHT@
30 */
31/* CMU_ENDHIST */
32/*
33 * Mach Operating System
34 * Copyright (c) 1991,1990 Carnegie Mellon University
35 * All Rights Reserved.
36 *
37 * Permission to use, copy, modify and distribute this software and its
38 * documentation is hereby granted, provided that both the copyright
39 * notice and this permission notice appear in all copies of the
40 * software, derivative works or modified versions, and any portions
41 * thereof, and that both notices appear in supporting documentation.
42 *
43 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
44 * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
45 * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
46 *
47 * Carnegie Mellon requests users of this software to return to
48 *
49 *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
50 *  School of Computer Science
51 *  Carnegie Mellon University
52 *  Pittsburgh PA 15213-3890
53 *
54 * any improvements or extensions that they make and grant Carnegie Mellon
55 * the rights to redistribute these changes.
56 */
57/*
58 */
59
60/*
61 * Global descriptor table.
62 */
63#include <i386/seg.h>
64
65struct real_descriptor master_gdt[GDTSZ]
66#if __x86_64__
67	__attribute__((section("__HIB,__desc")))
68#else
69	__attribute__((section("__INITGDT,__DATA")))
70#endif
71	__attribute__((aligned(CPU_CACHE_SIZE))) = {
72	[SEL_TO_INDEX(KERNEL32_CS)] = MAKE_REAL_DESCRIPTOR(	/* kernel 32-bit code */
73		0,
74		0xfffff,
75		SZ_32|SZ_G,
76		ACC_P|ACC_PL_K|ACC_CODE_R
77	),
78	[SEL_TO_INDEX(KERNEL_DS)] = MAKE_REAL_DESCRIPTOR(	/* kernel data */
79		0,
80		0xfffff,
81		SZ_32|SZ_G,
82		ACC_P|ACC_PL_K|ACC_DATA_W
83	),
84	[SEL_TO_INDEX(KERNEL64_CS)] = MAKE_REAL_DESCRIPTOR(	/* kernel 64-bit code */
85		0,
86		0xfffff,
87		SZ_64|SZ_G,
88		ACC_P|ACC_PL_K|ACC_CODE_R
89	),
90	[SEL_TO_INDEX(KERNEL64_SS)] = MAKE_REAL_DESCRIPTOR(	/* kernel 64-bit syscall stack */
91		0,
92		0xfffff,
93		SZ_32|SZ_G,
94		ACC_P|ACC_PL_K|ACC_DATA_W
95	),
96#ifdef __x86_64__
97	[SEL_TO_INDEX(USER_CS)] = MAKE_REAL_DESCRIPTOR(	/* 32-bit user code segment */
98		0,
99		0xfffff,
100 		SZ_32|SZ_G,
101		ACC_P|ACC_PL_U|ACC_CODE_R
102	),
103	[SEL_TO_INDEX(USER_DS)] = MAKE_REAL_DESCRIPTOR(	/* 32-bit user data segment */
104		0,
105		0xfffff,
106		SZ_32|SZ_G,
107		ACC_P|ACC_PL_U|ACC_DATA_W
108	),
109	[SEL_TO_INDEX(USER64_CS)] = MAKE_REAL_DESCRIPTOR(	/* user 64-bit code segment */
110		0,
111		0xfffff,
112		SZ_64|SZ_G,
113		ACC_P|ACC_PL_U|ACC_CODE_R
114	),
115#endif
116};
117