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 2007 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27#pragma ident "%Z%%M% %I% %E% SMI" 28 29#if defined(__lint) 30 31int global_descriptor_table[0x10]; 32 33#else /* __lint */ 34 35 .align 16 36 37 /* 38 * This must remain in sync with the entries in intel/sys/gdt.h; in 39 * particular kmdb uses B64CODE_SEL or B32CODE_SEL in perpetuity for 40 * its IDT entries (they're copied to the kernel's GDT in init_idt()). 41 */ 42 43global_descriptor_table: 44 .long 0 45 .long 0 46 47 /* GDT_B32DATA: 32 bit flat data descriptor */ 48 .value 0xFFFF /* segment limit 0..15 */ 49 .value 0x0000 /* segment base 0..15 */ 50 .byte 0x0 /* segment base 16..23 */ 51 .byte 0x92 /* P = 1, read/write data */ 52 .byte 0xCF /* G=1, B=1, Limit (16..19)=1111 */ 53 .byte 0x0 /* segment base 24..32 */ 54 55 /* GDT_B32CODE 32 bit flat code descriptor */ 56 .value 0xFFFF /* segment limit 0..15 */ 57 .value 0x0000 /* segment base 0..15 */ 58 .byte 0x0 /* segment base 16..23 */ 59 .byte 0x9E /* P=1, code, exec, readable */ 60 .byte 0xCF /* G=1, D=1, Limit (16..19)=1111 */ 61 .byte 0x0 /* segment base 24..32 */ 62 63 /* 64 * GDT_B16CODE 16 bit code descriptor for doing BIOS calls 65 */ 66 .value 0xFFFF /* segment limit 0..15 */ 67 .value 0x0000 /* segment base 0..15 */ 68 .byte 0x0 /* segment base 16..23 */ 69 .byte 0x9E /* P=1, code, exec, readable */ 70 .byte 0x0F /* G=0, D=0, Limit (16..19)=1111 */ 71 .byte 0x0 /* segment base 24..32 */ 72 73 /* 74 * GDT_B16DATA 16 bit data descriptor for doing BIOS calls 75 */ 76 .value 0xFFFF /* segment limit 0..15 */ 77 .value 0x0000 /* segment base 0..15 */ 78 .byte 0x0 /* segment base 16..23 */ 79 .byte 0x92 /* P = 1, read/write data */ 80 .byte 0x4F /* G=0, D=1, Limit (16..19)=1111 */ 81 .byte 0x0 /* segment base 24..32 */ 82 83 /* GDT_B64CODE: 64 bit flat code descriptor - only L bit has meaning */ 84 .value 0xFFFF /* segment limit 0..15 */ 85 .value 0x0000 /* segment base 0..15 */ 86 .byte 0x0 /* segment base 16..23 */ 87 .byte 0x9E /* P=1, code, exec, readable */ 88 .byte 0xAF /* G=1, D=0, L=1, Limit (16..19)=1111 */ 89 .byte 0x0 /* segment base 24..32 */ 90 91 /* 92 * unused 93 */ 94 .long 0 95 .long 0 96 97 /* 98 * GDT_BGSTMP -- an entry for kmdb to use during boot 99 */ 100 .long 0 101 .long 0 102 103gdt_info: 104 .value gdt_info - global_descriptor_table - 1 105 .long global_descriptor_table 106 .long 0 /* needed for 64 bit */ 107 108#endif /* __lint */ 109