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, Version 1.0 only 6 * (the "License"). You may not use this file except in compliance 7 * with the License. 8 * 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10 * or http://www.opensolaris.org/os/licensing. 11 * See the License for the specific language governing permissions 12 * and limitations under the License. 13 * 14 * When distributing Covered Code, include this CDDL HEADER in each 15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16 * If applicable, add the following below this CDDL HEADER, with the 17 * fields enclosed by brackets "[]" replaced with your own identifying 18 * information: Portions Copyright [yyyy] [name of copyright owner] 19 * 20 * CDDL HEADER END 21 */ 22 /* 23 * Copyright 2004 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 #ifndef _SYS_BOOTREGS_H 28 #define _SYS_BOOTREGS_H 29 30 #pragma ident "%Z%%M% %I% %E% SMI" 31 32 #ifdef __cplusplus 33 extern "C" { 34 #endif 35 36 #if defined(_KERNEL) || defined(_BOOT) 37 38 /* 39 * This structure is used by bootops to save/restore registers when 40 * transferring between protected and realmode code. 41 * 42 * NOTE: The following macros require an ANSI compiler! 43 */ 44 45 #define i8080reg(r) union { /* 8080-like "general purpose" registers */\ 46 uint32_t e ## r ## x; \ 47 struct { uint16_t r ## x; } word; \ 48 struct { uint8_t r ## l, r ## h; } byte; \ 49 } 50 51 #define i8086reg(r) union { /* 16/32-bit "special purpose" registers */\ 52 uint32_t e ## r; \ 53 struct { uint16_t r; } word; \ 54 } 55 56 struct bop_regs { 57 /* 58 * Machine state structure for realmode <-> protected mode callout 59 * operations: 60 */ 61 62 i8080reg(a) eax; /* The so-called "general purpose" registers */ 63 i8080reg(d) edx; 64 i8080reg(c) ecx; 65 i8080reg(b) ebx; 66 67 i8086reg(bp) ebp; /* 16/32-bit "pointer" registers */ 68 i8086reg(si) esi; 69 i8086reg(di) edi; 70 71 uint16_t ds; /* Segment registers */ 72 uint16_t es; 73 uint16_t fs; 74 uint16_t gs; 75 76 uint32_t eflags; 77 }; 78 79 #undef i8080reg 80 #undef i8086reg 81 #endif /* _KERNEL || _BOOT */ 82 83 #ifdef __cplusplus 84 } 85 #endif 86 87 #endif /* _SYS_BOOTREGS_H */ 88