| 1 | /*
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| 2 | * Copyright (C) 2006-2011 Oracle Corporation
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| 3 | *
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| 4 | * This file is part of VirtualBox Open Source Edition (OSE), as
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| 5 | * available from http://www.virtualbox.org. This file is free software;
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| 6 | * you can redistribute it and/or modify it under the terms of the GNU
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| 7 | * General Public License (GPL) as published by the Free Software
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| 8 | * Foundation, in version 2 as it comes in the "COPYING" file of the
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| 9 | * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
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| 10 | * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
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| 11 | * --------------------------------------------------------------------
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| 12 | *
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| 13 | * This code is based on:
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| 14 | *
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| 15 | * ROM BIOS for use with Bochs/Plex86/QEMU emulation environment
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| 16 | *
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| 17 | * Copyright (C) 2002 MandrakeSoft S.A.
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| 18 | *
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| 19 | * MandrakeSoft S.A.
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| 20 | * 43, rue d'Aboukir
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| 21 | * 75002 Paris - France
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| 22 | * http://www.linux-mandrake.com/
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| 23 | * http://www.mandrakesoft.com/
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| 24 | *
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| 25 | * This library is free software; you can redistribute it and/or
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| 26 | * modify it under the terms of the GNU Lesser General Public
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| 27 | * License as published by the Free Software Foundation; either
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| 28 | * version 2 of the License, or (at your option) any later version.
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| 29 | *
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| 30 | * This library is distributed in the hope that it will be useful,
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| 31 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 32 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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| 33 | * Lesser General Public License for more details.
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| 34 | *
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| 35 | * You should have received a copy of the GNU Lesser General Public
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| 36 | * License along with this library; if not, write to the Free Software
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| 37 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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| 38 | *
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| 39 | */
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| 40 |
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| 41 |
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| 42 | /* Compile-time assertion macro. */
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| 43 | #define ct_assert(a) extern int ct_ass_arr[!!(a) == 1];
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| 44 |
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| 45 | /* For functions called from assembly code. */
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| 46 | #define BIOSCALL __cdecl
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| 47 |
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| 48 | #define BX_ELTORITO_BOOT 1
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| 49 | #define BX_PCIBIOS 1
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| 50 | #define BX_USE_PS2_MOUSE 1
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| 51 | #define BX_APM 1
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| 52 |
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| 53 | #define DEBUG_ATA 0
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| 54 | #define DEBUG_AHCI 0
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| 55 | #define DEBUG_CD_BOOT 0
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| 56 | #define DEBUG_ELTORITO 0
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| 57 | #define DEBUG_INT13_HD 0
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| 58 | #define DEBUG_INT13_FL 0
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| 59 | #define DEBUG_INT13_CD 0
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| 60 | #define DEBUG_INT15 0
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| 61 | #define DEBUG_INT15_MS 0
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| 62 | #define DEBUG_INT16 0
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| 63 | #define DEBUG_INT1A 0
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| 64 | #define DEBUG_INT74 0
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| 65 |
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| 66 | #define FP_OFF(p) ((unsigned)(p))
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| 67 | #define FP_SEG(p) ((unsigned)((unsigned long)(void __far*)(p) >> 16))
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| 68 | #define MK_FP(s,o) (((unsigned short)(s)):>((void __near *)(o)))
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| 69 |
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| 70 | typedef struct {
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| 71 | union {
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| 72 | struct {
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| 73 | uint16_t di, si, bp, sp;
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| 74 | uint16_t bx, dx, cx, ax;
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| 75 | } r16;
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| 76 | struct {
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| 77 | uint16_t filler[4];
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| 78 | uint8_t bl, bh, dl, dh, cl, ch, al, ah;
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| 79 | } r8;
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| 80 | } u;
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| 81 | } pusha_regs_t;
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| 82 |
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| 83 | typedef struct {
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| 84 | union {
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| 85 | struct {
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| 86 | uint32_t edi, esi, ebp, esp;
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| 87 | uint32_t ebx, edx, ecx, eax;
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| 88 | } r32;
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| 89 | struct {
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| 90 | uint16_t di, filler1, si, filler2, bp, filler3, sp, filler4;
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| 91 | uint16_t bx, filler5, dx, filler6, cx, filler7, ax, filler8;
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| 92 | } r16;
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| 93 | struct {
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| 94 | uint32_t filler[4];
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| 95 | uint8_t bl, bh;
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| 96 | uint16_t filler1;
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| 97 | uint8_t dl, dh;
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| 98 | uint16_t filler2;
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| 99 | uint8_t cl, ch;
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| 100 | uint16_t filler3;
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| 101 | uint8_t al, ah;
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| 102 | uint16_t filler4;
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| 103 | } r8;
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| 104 | } u;
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| 105 | } pushad_regs_t;
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| 106 |
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| 107 | typedef struct {
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| 108 | union {
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| 109 | struct {
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| 110 | uint16_t flags;
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| 111 | } r16;
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| 112 | struct {
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| 113 | uint8_t flagsl;
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| 114 | uint8_t flagsh;
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| 115 | } r8;
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| 116 | } u;
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| 117 | } flags_t;
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| 118 |
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| 119 | typedef struct {
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| 120 | uint16_t ip;
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| 121 | uint16_t cs;
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| 122 | flags_t flags;
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| 123 | } iret_addr_t;
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| 124 |
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| 125 | typedef struct {
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| 126 | uint16_t ds;
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| 127 | uint16_t es;
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| 128 | pusha_regs_t gr;
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| 129 | iret_addr_t ra;
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| 130 | } disk_regs_t;
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| 131 |
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| 132 | typedef struct {
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| 133 | pusha_regs_t gr;
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| 134 | uint16_t es;
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| 135 | uint16_t ds;
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| 136 | iret_addr_t ra;
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| 137 | } kbd_regs_t;
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| 138 |
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| 139 | typedef struct {
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| 140 | pusha_regs_t gr;
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| 141 | uint16_t es;
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| 142 | uint16_t ds;
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| 143 | flags_t fl;
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| 144 | } sys_regs_t;
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| 145 |
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| 146 | typedef struct {
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| 147 | pushad_regs_t gr;
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| 148 | uint16_t es;
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| 149 | uint16_t ds;
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| 150 | flags_t fl;
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| 151 | } sys32_regs_t;
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| 152 |
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| 153 | typedef struct {
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| 154 | pusha_regs_t gr;
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| 155 | iret_addr_t ra;
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| 156 | } i1apci_regs_t;
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| 157 |
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| 158 |
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| 159 | #define SetCF(x) x.u.r8.flagsl |= 0x01
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| 160 | #define SetZF(x) x.u.r8.flagsl |= 0x40
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| 161 | #define ClearCF(x) x.u.r8.flagsl &= 0xfe
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| 162 | #define ClearZF(x) x.u.r8.flagsl &= 0xbf
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| 163 | #define GetCF(x) (x.u.r8.flagsl & 0x01)
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| 164 |
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| 165 | #define SET_AL(val8) AX = ((AX & 0xff00) | (val8))
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| 166 | #define SET_BL(val8) BX = ((BX & 0xff00) | (val8))
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| 167 | #define SET_CL(val8) CX = ((CX & 0xff00) | (val8))
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| 168 | #define SET_DL(val8) DX = ((DX & 0xff00) | (val8))
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| 169 | #define SET_AH(val8) AX = ((AX & 0x00ff) | ((val8) << 8))
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| 170 | #define SET_BH(val8) BX = ((BX & 0x00ff) | ((val8) << 8))
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| 171 | #define SET_CH(val8) CX = ((CX & 0x00ff) | ((val8) << 8))
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| 172 | #define SET_DH(val8) DX = ((DX & 0x00ff) | ((val8) << 8))
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| 173 |
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| 174 | #define GET_AL() ( AX & 0x00ff )
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| 175 | #define GET_BL() ( BX & 0x00ff )
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| 176 | #define GET_CL() ( CX & 0x00ff )
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| 177 | #define GET_DL() ( DX & 0x00ff )
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| 178 | #define GET_AH() ( AX >> 8 )
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| 179 | #define GET_BH() ( BX >> 8 )
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| 180 | #define GET_CH() ( CX >> 8 )
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| 181 | #define GET_DH() ( DX >> 8 )
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| 182 |
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| 183 | #define GET_ELDL() ( ELDX & 0x00ff )
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| 184 | #define GET_ELDH() ( ELDX >> 8 )
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| 185 |
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| 186 | #define SET_CF() FLAGS |= 0x0001
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| 187 | #define CLEAR_CF() FLAGS &= 0xfffe
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| 188 | #define GET_CF() (FLAGS & 0x0001)
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| 189 |
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| 190 | #define SET_ZF() FLAGS |= 0x0040
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| 191 | #define CLEAR_ZF() FLAGS &= 0xffbf
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| 192 | #define GET_ZF() (FLAGS & 0x0040)
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| 193 |
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| 194 | #define SET_IF() FLAGS |= 0x0200
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| 195 |
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| 196 | typedef unsigned short bx_bool;
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| 197 |
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| 198 | #define BX_VIRTUAL_PORTS 1 /* normal output to Bochs ports */
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| 199 | #define BX_DEBUG_SERIAL 0 /* output to COM1 */
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| 200 |
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| 201 | #define BIOS_PRINTF_HALT 1
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| 202 | #define BIOS_PRINTF_SCREEN 2
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| 203 | #define BIOS_PRINTF_INFO 4
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| 204 | #define BIOS_PRINTF_DEBUG 8
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| 205 | #define BIOS_PRINTF_ALL (BIOS_PRINTF_SCREEN | BIOS_PRINTF_INFO)
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| 206 | #define BIOS_PRINTF_DEBHALT (BIOS_PRINTF_SCREEN | BIOS_PRINTF_INFO | BIOS_PRINTF_HALT)
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| 207 |
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| 208 | extern const char bios_prefix_string[];
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| 209 | extern void bios_printf(uint16_t action, const char *s, ...);
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| 210 | extern void put_str(uint16_t action, const char __far *s);
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| 211 | extern void put_str_near(uint16_t action, const char __near *s);
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| 212 | extern uint8_t inb_cmos(uint8_t cmos_reg);
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| 213 | extern void outb_cmos(uint8_t cmos_reg, uint8_t val);
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| 214 | extern uint16_t cdrom_boot(void);
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| 215 | extern void show_logo(void);
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| 216 | extern void delay_boot(uint16_t secs);
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| 217 | extern bx_bool set_enable_a20(bx_bool val);
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| 218 |
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| 219 | #define printf(...) bios_printf(BIOS_PRINTF_SCREEN, __VA_ARGS__)
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| 220 |
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| 221 | // Defines the output macros.
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| 222 | // BX_DEBUG goes to INFO port until we can easily choose debug info on a
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| 223 | // per-device basis. Debug info are sent only in debug mode
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| 224 | #define DEBUG_ROMBIOS 1
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| 225 | #if DEBUG_ROMBIOS
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| 226 | # define BX_DEBUG(...) bios_printf(BIOS_PRINTF_INFO, __VA_ARGS__)
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| 227 | #else
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| 228 | # define BX_DEBUG(...)
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| 229 | #endif
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| 230 | #ifdef VBOX
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| 231 | #define BX_INFO(...) do { put_str(BIOS_PRINTF_INFO, bios_prefix_string); bios_printf(BIOS_PRINTF_INFO, __VA_ARGS__); } while (0)
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| 232 | #else /* !VBOX */
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| 233 | #define BX_INFO(...) bios_printf(BIOS_PRINTF_INFO, __VA_ARGS__)
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| 234 | #endif /* !VBOX */
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| 235 | #define BX_PANIC(...) bios_printf(BIOS_PRINTF_DEBHALT, __VA_ARGS__)
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| 236 |
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| 237 | /* Because we don't tell the recompiler when guest physical memory
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| 238 | * is written, it can incorrectly cache guest code overwritten by
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| 239 | * DMA (bus master or not). We just re-write the memory block to flush
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| 240 | * any of its caches. This is not exactly efficient, but works!
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| 241 | */
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| 242 | #define DMA_WORKAROUND 1
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| 243 |
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| 244 | /* Random hardware-related definitions. */
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| 245 |
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| 246 | #define PIC_MASTER 0x20
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| 247 | #define PIC_MASTER_MASK 0x21
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| 248 | #define PIC_SLAVE 0xA0
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| 249 | #define PIC_SLAVE_MASK 0xA1
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| 250 | #define PIC_CMD_EOI 0x20
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| 251 | #define PIC_CMD_RD_ISR 0x0B
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| 252 | #define PIC_CMD_INIT 0x11
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