1/*
2 * Copyright (c) 2000-2006 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 * @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 <mach/machine.h>
64#include <mach/i386/vm_param.h>
65#include <kern/thread.h>
66#include <i386/cpu_data.h>
67#include <i386/mp_desc.h>
68
69struct fake_descriptor master_gdt[GDTSZ] __attribute__ ((aligned (4096))) = {
70	[SEL_TO_INDEX(KERNEL_CS)] {	/* kernel code */
71		0,
72		  0xfffff,
73		  SZ_32|SZ_G,
74		ACC_P|ACC_PL_K|ACC_CODE_R,
75	},
76	[SEL_TO_INDEX(KERNEL_DS)] {	/* kernel data */
77		0,
78		  0xfffff,
79		  SZ_32|SZ_G,
80		  ACC_P|ACC_PL_K|ACC_DATA_W
81	},
82	[SEL_TO_INDEX(KERNEL_LDT)] {	/* local descriptor table */
83		(uint32_t) &master_ldt,
84		  LDTSZ_MIN*sizeof(struct fake_descriptor)-1,
85		  0,
86		  ACC_P|ACC_PL_K|ACC_LDT
87	},				/* The slot KERNEL_LDT_2 is reserved. */
88	[SEL_TO_INDEX(KERNEL_TSS)] {	/* TSS for this processor */
89		(uint32_t) &master_ktss,
90		  sizeof(struct i386_tss)-1,
91		  0,
92		  ACC_P|ACC_PL_K|ACC_TSS
93	},				/* The slot KERNEL_TSS_2 is reserved. */
94	[SEL_TO_INDEX(CPU_DATA_GS)] {	/* per-CPU current thread address */
95		(uint32_t) &cpu_data_master,
96		  sizeof(cpu_data_t)-1,
97		  SZ_32,
98		  ACC_P|ACC_PL_K|ACC_DATA_W
99	},
100	[SEL_TO_INDEX(USER_LDT)] {	/* user local descriptor table */
101		(uint32_t) &master_ldt,
102		  LDTSZ_MIN*sizeof(struct fake_descriptor)-1,
103		  0,
104		  ACC_P|ACC_PL_K|ACC_LDT
105	},
106	[SEL_TO_INDEX(KERNEL64_CS)] {	/* kernel 64-bit code */
107		0,
108		0xfffff,
109		SZ_64|SZ_G,
110		ACC_P|ACC_PL_K|ACC_CODE_R
111	},
112	[SEL_TO_INDEX(KERNEL64_SS)] {	/* kernel 64-bit syscall stack */
113		0,
114		0xfffff,
115		SZ_32|SZ_G,
116		ACC_P|ACC_PL_K|ACC_DATA_W
117	},
118#if	MACH_KDB
119	[SEL_TO_INDEX(DEBUG_TSS)] {	/* TSS for this processor */
120		(uint32_t)&master_dbtss,
121		  sizeof(struct i386_tss)-1,
122		  0,
123		  ACC_P|ACC_PL_K|ACC_TSS
124	},
125#endif	/* MACH_KDB */
126};
127