biosvar.h revision 1.53
1/* $OpenBSD: biosvar.h,v 1.53 2010/11/22 21:08:08 miod 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 32 /* some boxes put apm data seg in the 2nd page */ 33#define BOOTARG_OFF (NBPG*2) 34#define BOOTARG_LEN (NBPG*1) 35#define BOOTBIOS_ADDR (0x7c00) 36 37 /* physical page for ptp 0 need for various tramps */ 38#define PTP0_PA (NBPG*3) 39 40 /* BIOS configure flags */ 41#define BIOSF_BIOS32 0x0001 42#define BIOSF_PCIBIOS 0x0002 43#define BIOSF_PROMSCAN 0x0004 44#define BIOSF_SMBIOS 0x0008 45 46/* BIOS media ID */ 47#define BIOSM_F320K 0xff /* floppy ds/sd 8 spt */ 48#define BIOSM_F160K 0xfe /* floppy ss/sd 8 spt */ 49#define BIOSM_F360K 0xfd /* floppy ds/sd 9 spt */ 50#define BIOSM_F180K 0xfc /* floppy ss/sd 9 spt */ 51#define BIOSM_ROMD 0xfa /* ROM disk */ 52#define BIOSM_F120M 0xf9 /* floppy ds/hd 15 spt 5.25" */ 53#define BIOSM_F720K 0xf9 /* floppy ds/dd 9 spt 3.50" */ 54#define BIOSM_HD 0xf8 /* hard drive */ 55#define BIOSM_F144K 0xf0 /* floppy ds/hd 18 spt 3.50" */ 56#define BIOSM_OTHER 0xf0 /* any other */ 57 58/* 59 * BIOS memory maps 60 */ 61#define BIOS_MAP_END 0x00 /* End of array XXX - special */ 62#define BIOS_MAP_FREE 0x01 /* Usable memory */ 63#define BIOS_MAP_RES 0x02 /* Reserved memory */ 64#define BIOS_MAP_ACPI 0x03 /* ACPI Reclaim memory */ 65#define BIOS_MAP_NVS 0x04 /* ACPI NVS memory */ 66 67/* 68 * Optional ROM header 69 */ 70typedef 71struct bios_romheader { 72 u_int16_t signature; /* 0xaa55 */ 73 u_int8_t len; /* length in pages (512 bytes) */ 74 u_int32_t entry; /* initialization entry point */ 75 u_int8_t reserved[19]; 76 u_int16_t pnpheader; /* offset to PnP expansion header */ 77} __packed *bios_romheader_t; 78 79/* 80 * BIOS32 81 */ 82typedef 83struct bios32_header { 84 u_int32_t signature; /* 00: signature "_32_" */ 85 u_int32_t entry; /* 04: entry point */ 86 u_int8_t rev; /* 08: revision */ 87 u_int8_t length; /* 09: header length */ 88 u_int8_t cksum; /* 0a: modulo 256 checksum */ 89 u_int8_t reserved[5]; 90} __packed *bios32_header_t; 91 92typedef 93struct bios32_entry_info { 94 u_int32_t bei_base; 95 u_int32_t bei_size; 96 u_int32_t bei_entry; 97} __packed *bios32_entry_info_t; 98 99typedef 100struct bios32_entry { 101 u_int32_t offset; 102 u_int16_t segment; 103} __packed *bios32_entry_t; 104 105#define BIOS32_START 0xe0000 106#define BIOS32_SIZE 0x20000 107#define BIOS32_END (BIOS32_START + BIOS32_SIZE - 0x10) 108 109#define BIOS32_MAKESIG(a, b, c, d) \ 110 ((a) | ((b) << 8) | ((c) << 16) | ((d) << 24)) 111#define BIOS32_SIGNATURE BIOS32_MAKESIG('_', '3', '2', '_') 112#define PCIBIOS_SIGNATURE BIOS32_MAKESIG('$', 'P', 'C', 'I') 113#define SMBIOS_SIGNATURE BIOS32_MAKESIG('_', 'S', 'M', '_') 114 115/* 116 * CTL_BIOS definitions. 117 */ 118#define BIOS_DEV 1 /* int: BIOS boot device */ 119#define BIOS_DISKINFO 2 /* struct: BIOS boot device info */ 120#define BIOS_CKSUMLEN 3 /* int: disk cksum block count */ 121#define BIOS_MAXID 4 /* number of valid machdep ids */ 122 123#define CTL_BIOS_NAMES { \ 124 { 0, 0 }, \ 125 { "biosdev", CTLTYPE_INT }, \ 126 { "diskinfo", CTLTYPE_STRUCT }, \ 127 { "cksumlen", CTLTYPE_INT }, \ 128} 129 130#define BOOTARG_MEMMAP 0 131typedef struct _bios_memmap { 132 u_int64_t addr; /* Beginning of block */ 133 u_int64_t size; /* Size of block */ 134 u_int32_t type; /* Type of block */ 135} __packed bios_memmap_t; 136 137/* Info about disk from the bios, plus the mapping from 138 * BIOS numbers to BSD major (driver?) number. 139 * 140 * Also, do not bother with BIOSN*() macros, just parcel 141 * the info out, and use it like this. This makes for less 142 * of a dependance on BIOSN*() macros having to be the same 143 * across /boot, /bsd, and userland. 144 */ 145#define BOOTARG_DISKINFO 1 146typedef struct _bios_diskinfo { 147 /* BIOS section */ 148 int bios_number; /* BIOS number of drive (or -1) */ 149 u_int bios_cylinders; /* BIOS cylinders */ 150 u_int bios_heads; /* BIOS heads */ 151 u_int bios_sectors; /* BIOS sectors */ 152 int bios_edd; /* EDD support */ 153 154 /* BSD section */ 155 dev_t bsd_dev; /* BSD device */ 156 157 /* Checksum section */ 158 u_int32_t checksum; /* Checksum for drive */ 159 160 /* Misc. flags */ 161 u_int32_t flags; 162#define BDI_INVALID 0x00000001 /* I/O error during checksumming */ 163#define BDI_GOODLABEL 0x00000002 /* Had SCSI or ST506/ESDI disklabel */ 164#define BDI_BADLABEL 0x00000004 /* Had another disklabel */ 165#define BDI_EL_TORITO 0x00000008 /* 2,048-byte sectors */ 166#define BDI_PICKED 0x80000000 /* kernel-only: cksum matched */ 167 168} __packed bios_diskinfo_t; 169 170#define BOOTARG_APMINFO 2 171typedef struct _bios_apminfo { 172 /* APM_CONNECT returned values */ 173 u_int apm_detail; 174 u_int apm_code32_base; 175 u_int apm_code16_base; 176 u_int apm_code_len; 177 u_int apm_data_base; 178 u_int apm_data_len; 179 u_int apm_entry; 180 u_int apm_code16_len; 181} __packed bios_apminfo_t; 182 183#define BOOTARG_CKSUMLEN 3 /* u_int32_t */ 184 185#define BOOTARG_PCIINFO 4 186typedef struct _bios_pciinfo { 187 /* PCI BIOS v2.0+ - Installation check values */ 188 u_int32_t pci_chars; /* Characteristics (%eax) */ 189 u_int32_t pci_rev; /* BCD Revision (%ebx) */ 190 u_int32_t pci_entry32; /* PM entry point for PCI BIOS */ 191 u_int32_t pci_lastbus; /* Number of last PCI bus */ 192} __packed bios_pciinfo_t; 193 194#define BOOTARG_CONSDEV 5 195typedef struct _bios_consdev { 196 dev_t consdev; 197 int conspeed; 198} __packed bios_consdev_t; 199 200#define BOOTARG_SMPINFO 6 /* struct mp_float[] */ 201 202#define BOOTARG_BOOTMAC 7 203typedef struct _bios_bootmac { 204 char mac[6]; 205} __packed bios_bootmac_t; 206 207#define BOOTARG_DDB 8 208typedef struct _bios_ddb { 209 int db_console; 210} __packed bios_ddb_t; 211 212#if defined(_KERNEL) || defined (_STANDALONE) 213 214#ifdef _LOCORE 215#define DOINT(n) int $0x20+(n) 216#else 217#define DOINT(n) "int $0x20+(" #n ")" 218 219extern volatile struct BIOS_regs { 220 u_int32_t biosr_ax; 221 u_int32_t biosr_cx; 222 u_int32_t biosr_dx; 223 u_int32_t biosr_bx; 224 u_int32_t biosr_bp; 225 u_int32_t biosr_si; 226 u_int32_t biosr_di; 227 u_int32_t biosr_ds; 228 u_int32_t biosr_es; 229} __packed BIOS_regs; 230 231#ifdef _KERNEL 232#include <machine/bus.h> 233 234struct bios_attach_args { 235 char *ba_name; 236 u_int ba_func; 237 bus_space_tag_t ba_iot; 238 bus_space_tag_t ba_memt; 239 union { 240 void *_p; 241 bios_apminfo_t *_ba_apmp; 242 paddr_t _ba_acpipbase; 243 } _; 244}; 245 246#define ba_apmp _._ba_apmp 247#define ba_acpipbase _._ba_acpipbase 248 249struct consdev; 250struct proc; 251 252int bios_sysctl(int *, u_int, void *, size_t *, void *, size_t, struct proc *); 253 254void bios_getopt(void); 255 256/* bios32.c */ 257int bios32_service(u_int32_t, bios32_entry_t, bios32_entry_info_t); 258 259extern u_int bootapiver; 260extern bios_memmap_t *bios_memmap; 261extern void *bios_smpinfo; 262extern bios_pciinfo_t *bios_pciinfo; 263 264#endif /* _KERNEL */ 265#endif /* _LOCORE */ 266#endif /* _KERNEL || _STANDALONE */ 267 268#endif /* _I386_BIOSVAR_H_ */ 269