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 2008 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 28#if defined(__lint) 29#pragma pack(1) 30struct { 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]; 38struct { 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 54global_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 0x9E /* 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 0x9E /* 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 0x9E /* 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 115fake_cpu_gdt_base_0_15: 116 117 .value 0x0000 /* segment base 0..15 */ 118 119 .globl fake_cpu_gdt_base_16_23 120fake_cpu_gdt_base_16_23: 121 .byte 0x0 /* segment base 16..23 */ 122 .byte 0x9E /* 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 126fake_cpu_gdt_base_24_31: 127 .byte 0x0 /* segment base 24..32 */ 128 129/ .long 0 130/ .long 0 131 132gdt_info: 133 .value gdt_info - global_descriptor_table - 1 134 .long global_descriptor_table 135 .long 0 /* needed for 64 bit */ 136 137fake_cpu: 138 .4byte 0 139 .4byte 0 140 .4byte 0 141 .globl fake_cpu_ptr 142fake_cpu_ptr: 143 .4byte 0 144 .skip 0x6c0, 0 145 146#endif /* __lint */ 147