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 #ifdef __cplusplus 31 extern "C" { 32 #endif 33 34 #if defined(_KERNEL) || defined(_BOOT) 35 36 /* 37 * This structure is used by bootops to save/restore registers when 38 * transferring between protected and realmode code. 39 * 40 * NOTE: The following macros require an ANSI compiler! 41 */ 42 43 #define i8080reg(r) union { /* 8080-like "general purpose" registers */\ 44 uint32_t e ## r ## x; \ 45 struct { uint16_t r ## x; } word; \ 46 struct { uint8_t r ## l, r ## h; } byte; \ 47 } 48 49 #define i8086reg(r) union { /* 16/32-bit "special purpose" registers */\ 50 uint32_t e ## r; \ 51 struct { uint16_t r; } word; \ 52 } 53 54 struct bop_regs { 55 /* 56 * Machine state structure for realmode <-> protected mode callout 57 * operations: 58 */ 59 60 i8080reg(a) eax; /* The so-called "general purpose" registers */ 61 i8080reg(d) edx; 62 i8080reg(c) ecx; 63 i8080reg(b) ebx; 64 65 i8086reg(bp) ebp; /* 16/32-bit "pointer" registers */ 66 i8086reg(si) esi; 67 i8086reg(di) edi; 68 69 uint16_t ds; /* Segment registers */ 70 uint16_t es; 71 uint16_t fs; 72 uint16_t gs; 73 74 uint32_t eflags; 75 }; 76 77 #undef i8080reg 78 #undef i8086reg 79 #endif /* _KERNEL || _BOOT */ 80 81 #ifdef __cplusplus 82 } 83 #endif 84 85 #endif /* _SYS_BOOTREGS_H */ 86