biosvar.h revision 1.49
1/* $OpenBSD: biosvar.h,v 1.49 2007/12/05 19:17:13 deraadt Exp $ */ 2 3/* 4 * Copyright (c) 1997-1999 Michael Shalayeff 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19 * IN NO EVENT SHALL THE AUTHOR OR HIS RELATIVES BE LIABLE FOR ANY DIRECT, 20 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 21 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 22 * SERVICES; LOSS OF MIND, USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 24 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 25 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 26 * THE POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29#ifndef _I386_BIOSVAR_H_ 30#define _I386_BIOSVAR_H_ 31#pragma pack(1) 32 33 /* some boxes put apm data seg in the 2nd page */ 34#define BOOTARG_OFF (NBPG*2) 35#define BOOTARG_LEN (NBPG*1) 36#define BOOTBIOS_ADDR (0x7c00) 37 38 /* BIOS configure flags */ 39#define BIOSF_BIOS32 0x0001 40#define BIOSF_PCIBIOS 0x0002 41#define BIOSF_PROMSCAN 0x0004 42#define BIOSF_SMBIOS 0x0008 43 44/* BIOS media ID */ 45#define BIOSM_F320K 0xff /* floppy ds/sd 8 spt */ 46#define BIOSM_F160K 0xfe /* floppy ss/sd 8 spt */ 47#define BIOSM_F360K 0xfd /* floppy ds/sd 9 spt */ 48#define BIOSM_F180K 0xfc /* floppy ss/sd 9 spt */ 49#define BIOSM_ROMD 0xfa /* ROM disk */ 50#define BIOSM_F120M 0xf9 /* floppy ds/hd 15 spt 5.25" */ 51#define BIOSM_F720K 0xf9 /* floppy ds/dd 9 spt 3.50" */ 52#define BIOSM_HD 0xf8 /* hard drive */ 53#define BIOSM_F144K 0xf0 /* floppy ds/hd 18 spt 3.50" */ 54#define BIOSM_OTHER 0xf0 /* any other */ 55 56/* 57 * BIOS memory maps 58 */ 59#define BIOS_MAP_END 0x00 /* End of array XXX - special */ 60#define BIOS_MAP_FREE 0x01 /* Usable memory */ 61#define BIOS_MAP_RES 0x02 /* Reserved memory */ 62#define BIOS_MAP_ACPI 0x03 /* ACPI Reclaim memory */ 63#define BIOS_MAP_NVS 0x04 /* ACPI NVS memory */ 64 65/* 66 * Optional ROM header 67 */ 68typedef 69struct bios_romheader { 70 u_int16_t signature; /* 0xaa55 */ 71 u_int8_t len; /* length in pages (512 bytes) */ 72 u_int32_t entry; /* initialization entry point */ 73 u_int8_t reserved[19]; 74 u_int16_t pnpheader; /* offset to PnP expansion header */ 75} *bios_romheader_t; 76 77/* 78 * BIOS32 79 */ 80typedef 81struct bios32_header { 82 u_int32_t signature; /* 00: signature "_32_" */ 83 u_int32_t entry; /* 04: entry point */ 84 u_int8_t rev; /* 08: revision */ 85 u_int8_t length; /* 09: header length */ 86 u_int8_t cksum; /* 0a: modulo 256 checksum */ 87 u_int8_t reserved[5]; 88} *bios32_header_t; 89 90typedef 91struct bios32_entry_info { 92 u_int32_t bei_base; 93 u_int32_t bei_size; 94 u_int32_t bei_entry; 95} *bios32_entry_info_t; 96 97typedef 98struct bios32_entry { 99 u_int32_t offset; 100 u_int16_t segment; 101} *bios32_entry_t; 102 103#define BIOS32_START 0xe0000 104#define BIOS32_SIZE 0x20000 105#define BIOS32_END (BIOS32_START + BIOS32_SIZE - 0x10) 106 107#define BIOS32_MAKESIG(a, b, c, d) \ 108 ((a) | ((b) << 8) | ((c) << 16) | ((d) << 24)) 109#define BIOS32_SIGNATURE BIOS32_MAKESIG('_', '3', '2', '_') 110#define PCIBIOS_SIGNATURE BIOS32_MAKESIG('$', 'P', 'C', 'I') 111#define SMBIOS_SIGNATURE BIOS32_MAKESIG('_', 'S', 'M', '_') 112 113/* 114 * CTL_BIOS definitions. 115 */ 116#define BIOS_DEV 1 /* int: BIOS boot device */ 117#define BIOS_DISKINFO 2 /* struct: BIOS boot device info */ 118#define BIOS_CKSUMLEN 3 /* int: disk cksum block count */ 119#define BIOS_MAXID 4 /* number of valid machdep ids */ 120 121#define CTL_BIOS_NAMES { \ 122 { 0, 0 }, \ 123 { "biosdev", CTLTYPE_INT }, \ 124 { "diskinfo", CTLTYPE_STRUCT }, \ 125 { "cksumlen", CTLTYPE_INT }, \ 126} 127 128#define BOOTARG_MEMMAP 0 129typedef struct _bios_memmap { 130 u_int64_t addr; /* Beginning of block */ 131 u_int64_t size; /* Size of block */ 132 u_int32_t type; /* Type of block */ 133} bios_memmap_t; 134 135/* Info about disk from the bios, plus the mapping from 136 * BIOS numbers to BSD major (driver?) number. 137 * 138 * Also, do not bother with BIOSN*() macros, just parcel 139 * the info out, and use it like this. This makes for less 140 * of a dependance on BIOSN*() macros having to be the same 141 * across /boot, /bsd, and userland. 142 */ 143#define BOOTARG_DISKINFO 1 144typedef struct _bios_diskinfo { 145 /* BIOS section */ 146 int bios_number; /* BIOS number of drive (or -1) */ 147 u_int bios_cylinders; /* BIOS cylinders */ 148 u_int bios_heads; /* BIOS heads */ 149 u_int bios_sectors; /* BIOS sectors */ 150 int bios_edd; /* EDD support */ 151 152 /* BSD section */ 153 dev_t bsd_dev; /* BSD device */ 154 155 /* Checksum section */ 156 u_int32_t checksum; /* Checksum for drive */ 157 158 /* Misc. flags */ 159 u_int32_t flags; 160#define BDI_INVALID 0x00000001 /* I/O error during checksumming */ 161#define BDI_GOODLABEL 0x00000002 /* Had SCSI or ST506/ESDI disklabel */ 162#define BDI_BADLABEL 0x00000004 /* Had another disklabel */ 163#define BDI_EL_TORITO 0x00000008 /* 2,048-byte sectors */ 164#define BDI_PICKED 0x80000000 /* kernel-only: cksum matched */ 165 166} bios_diskinfo_t; 167 168#define BOOTARG_APMINFO 2 169typedef struct _bios_apminfo { 170 /* APM_CONNECT returned values */ 171 u_int apm_detail; 172 u_int apm_code32_base; 173 u_int apm_code16_base; 174 u_int apm_code_len; 175 u_int apm_data_base; 176 u_int apm_data_len; 177 u_int apm_entry; 178 u_int apm_code16_len; 179} bios_apminfo_t; 180 181#define BOOTARG_CKSUMLEN 3 /* u_int32_t */ 182 183#define BOOTARG_PCIINFO 4 184typedef struct _bios_pciinfo { 185 /* PCI BIOS v2.0+ - Installation check values */ 186 u_int32_t pci_chars; /* Characteristics (%eax) */ 187 u_int32_t pci_rev; /* BCD Revision (%ebx) */ 188 u_int32_t pci_entry32; /* PM entry point for PCI BIOS */ 189 u_int32_t pci_lastbus; /* Number of last PCI bus */ 190} bios_pciinfo_t; 191 192#define BOOTARG_CONSDEV 5 193typedef struct _bios_consdev { 194 dev_t consdev; 195 int conspeed; 196} bios_consdev_t; 197 198#define BOOTARG_SMPINFO 6 /* struct mp_float[] */ 199 200#define BOOTARG_BOOTMAC 7 201typedef struct _bios_bootmac { 202 char mac[6]; 203} bios_bootmac_t; 204 205#if defined(_KERNEL) || defined (_STANDALONE) 206 207#ifdef _LOCORE 208#define DOINT(n) int $0x20+(n) 209#else 210#define DOINT(n) "int $0x20+(" #n ")" 211 212extern volatile struct BIOS_regs { 213 u_int32_t biosr_ax; 214 u_int32_t biosr_cx; 215 u_int32_t biosr_dx; 216 u_int32_t biosr_bx; 217 u_int32_t biosr_bp; 218 u_int32_t biosr_si; 219 u_int32_t biosr_di; 220 u_int32_t biosr_ds; 221 u_int32_t biosr_es; 222} BIOS_regs; 223 224#ifdef _KERNEL 225#include <machine/bus.h> 226 227struct bios_attach_args { 228 char *ba_name; 229 u_int ba_func; 230 bus_space_tag_t ba_iot; 231 bus_space_tag_t ba_memt; 232 union { 233 void *_p; 234 bios_apminfo_t *_ba_apmp; 235 paddr_t _ba_acpipbase; 236 } _; 237}; 238 239#define ba_apmp _._ba_apmp 240#define ba_acpipbase _._ba_acpipbase 241 242struct consdev; 243struct proc; 244 245int bios_sysctl(int *, u_int, void *, size_t *, void *, size_t, struct proc *); 246 247void bioscnprobe(struct consdev *); 248void bioscninit(struct consdev *); 249void bioscnputc(dev_t, int); 250int bioscngetc(dev_t); 251void bioscnpollc(dev_t, int); 252void bios_getopt(void); 253 254/* bios32.c */ 255int bios32_service(u_int32_t, bios32_entry_t, bios32_entry_info_t); 256 257extern u_int bootapiver; 258extern bios_memmap_t *bios_memmap; 259extern void *bios_smpinfo; 260extern bios_pciinfo_t *bios_pciinfo; 261 262#endif /* _KERNEL */ 263#endif /* _LOCORE */ 264#endif /* _KERNEL || _STANDALONE */ 265 266#pragma pack() 267#endif /* _I386_BIOSVAR_H_ */ 268