1 /*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21
22 /*
23 * Copyright 2010 Sun Microsystems, Inc. All rights reserved.
24 * Use is subject to license terms.
25 */
26
27
28 #if defined(__lint)
29 #pragma pack(1)
30 struct {
31 uint16_t limit_low;
32 uint16_t base_low;
33 uint8_t base_middle;
34 uint8_t attr;
35 uint8_t attr_and_limit;
36 uint8_t base_high;
37 } global_descriptor_table[8];
38 struct {
39 uint16_t limit; /* sizeof (global_descriptor_table) - 1 */
40 void *base; /* &global_descriptor_table */
41 } gdt_info;
42 #pragma pack()
43
44 #else /* __lint */
45
46 .align 16
47 .data
48 /*
49 * This must remain in sync with the entries in intel/sys/gdt.h; in
50 * particular kmdb uses B64CODE_SEL or B32CODE_SEL in perpetuity for
51 * its IDT entries (they're copied to the kernel's GDT in init_idt()).
52 */
53
54 global_descriptor_table:
55 .long 0
56 .long 0
57
58 /* GDT_B32DATA: 32 bit flat data descriptor */
59 .value 0xFFFF /* segment limit 0..15 */
60 .value 0x0000 /* segment base 0..15 */
61 .byte 0x0 /* segment base 16..23 */
62 .byte 0x92 /* P = 1, read/write data */
63 .byte 0xCF /* G=1, B=1, Limit (16..19)=1111 */
64 .byte 0x0 /* segment base 24..32 */
65
66 /* GDT_B32CODE 32 bit flat code descriptor */
67 .value 0xFFFF /* segment limit 0..15 */
68 .value 0x0000 /* segment base 0..15 */
69 .byte 0x0 /* segment base 16..23 */
70 .byte 0x9A /* P=1, code, exec, readable */
71 .byte 0xCF /* G=1, D=1, Limit (16..19)=1111 */
72 .byte 0x0 /* segment base 24..32 */
73
74 /*
75 * GDT_B16CODE 16 bit code descriptor for doing BIOS calls
76 */
77 .value 0xFFFF /* segment limit 0..15 */
78 .value 0x0000 /* segment base 0..15 */
79 .byte 0x0 /* segment base 16..23 */
80 .byte 0x9A /* P=1, code, exec, readable */
81 .byte 0x0F /* G=0, D=0, Limit (16..19)=1111 */
82 .byte 0x0 /* segment base 24..32 */
83
84 /*
85 * GDT_B16DATA 16 bit data descriptor for doing BIOS calls
86 */
87 .value 0xFFFF /* segment limit 0..15 */
88 .value 0x0000 /* segment base 0..15 */
89 .byte 0x0 /* segment base 16..23 */
90 .byte 0x92 /* P = 1, read/write data */
91 .byte 0x4F /* G=0, D=1, Limit (16..19)=1111 */
92 .byte 0x0 /* segment base 24..32 */
93
94 /* GDT_B64CODE: 64 bit flat code descriptor - only L bit has meaning */
95 .value 0xFFFF /* segment limit 0..15 */
96 .value 0x0000 /* segment base 0..15 */
97 .byte 0x0 /* segment base 16..23 */
98 .byte 0x9A /* P=1, code, exec, readable */
99 .byte 0xAF /* G=1, D=0, L=1, Limit (16..19)=1111 */
100 .byte 0x0 /* segment base 24..32 */
101
102 /*
103 * unused
104 */
105 .long 0
106 .long 0
107
108 /*
109 * GDT_BGSTMP -- an entry for kmdb to use during boot
110 * the fast reboot code uses this entry for memory copies, too.
111 */
112 .value 0x0001 /* segment limit 0..15 */
113
114 .globl fake_cpu_gdt_base_0_15
115 fake_cpu_gdt_base_0_15:
116
117 .value 0x0000 /* segment base 0..15 */
118
119 .globl fake_cpu_gdt_base_16_23
120 fake_cpu_gdt_base_16_23:
121 .byte 0x0 /* segment base 16..23 */
122 .byte 0x9A /* P=1, code, exec, readable */
123 .byte 0xC0 /* G=1, D=1, Limit (16..19)=0000 */
124
125 .globl fake_cpu_gdt_base_24_31
126 fake_cpu_gdt_base_24_31:
127 .byte 0x0 /* segment base 24..32 */
128
129 / .long 0
130 / .long 0
131
132 gdt_info:
133 .value gdt_info - global_descriptor_table - 1
134 .long global_descriptor_table
135 .long 0 /* needed for 64 bit */
136
137 fake_cpu:
138 .4byte 0
139 .4byte 0
140 .4byte 0
141 .globl fake_cpu_ptr
142 fake_cpu_ptr:
143 .4byte 0
144 .skip 0x6c0, 0
145
146 #endif /* __lint */