bios.h revision 49953
1/*- 2 * Copyright (c) 1997 Michael Smith 3 * Copyright (c) 1998 Jonathan Lemon 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25 * SUCH DAMAGE. 26 * 27 * $Id: bios.h,v 1.3 1999/07/29 01:49:19 msmith Exp $ 28 */ 29 30/* 31 * Signature structure for the BIOS32 Service Directory header 32 */ 33struct bios32_SDheader 34{ 35 u_int8_t sig[4]; 36 u_int32_t entry; 37 u_int8_t revision; 38 u_int8_t len; 39 u_int8_t cksum; 40 u_int8_t pad[5]; 41}; 42 43/* 44 * BIOS32 Service Directory entry. Caller supplies name, bios32_SDlookup 45 * fills in the rest of the details. 46 */ 47struct bios32_SDentry 48{ 49 union 50 { 51 u_int8_t name[4]; /* service identifier */ 52 u_int32_t id; /* as a 32-bit value */ 53 } ident; 54 u_int32_t base; /* base of service */ 55 u_int32_t len; /* service length */ 56 u_int32_t entry; /* entrypoint offset from base */ 57}; 58 59extern int bios32_SDlookup(struct bios32_SDentry *ent); 60extern u_int32_t bios_sigsearch(u_int32_t start, u_char *sig, int siglen, 61 int paralen, int sigofs); 62 63#define BIOS_PADDRTOVADDR(x) (((x) - ISA_HOLE_START) + atdevbase) 64#define BIOS_VADDRTOPADDR(x) (((x) - atdevbase) + ISA_HOLE_START) 65 66 67/* 68 * System Management BIOS / Desktop Management Interface tables 69 */ 70 71struct DMI_table 72{ 73 u_int8_t sig[5]; /* "_DMI_" */ 74 u_int8_t cksum; /* checksum */ 75 u_int16_t st_size; /* total length of SMBIOS table (bytes)*/ 76 u_int32_t st_base; /* base address of the SMBIOS table (physical) */ 77 u_int16_t st_entries; /* total number of structures present in the table */ 78 u_int8_t bcd_revision; /* interface revision number */ 79}; 80 81struct SMBIOS_table 82{ 83 u_int8_t sig[4]; /* "_SM_" */ 84 u_int8_t cksum; /* checksum */ 85 u_int8_t len; /* structure length */ 86 u_int8_t major, minor; /* major/minor revision numbers */ 87 u_int16_t st_maxsize; /* largest structure size (bytes) */ 88 u_int8_t revision; /* entrypoint revision */ 89 u_int8_t pad[5]; 90 struct DMI_table dmi; /* follows immediately */ 91}; 92 93 94/* 95 * PnP BIOS presence structure 96 */ 97struct PnPBIOS_table 98{ 99 u_int8_t sig[4]; /* "$PnP */ 100 u_int8_t version; /* should be 0x10 */ 101 u_int8_t len; /* total structure length */ 102 u_int16_t control; /* BIOS feature flags */ 103 u_int8_t cksum; /* checksum */ 104 u_int32_t evflagaddr; /* address of event notificaton flag */ 105 u_int16_t rmentryoffset; /* real-mode entry offset */ 106 u_int16_t rmentryseg; /* segment */ 107 u_int16_t pmentryoffset; /* protected-mode entry offset */ 108 u_int32_t pmentrybase; /* segment base */ 109 u_int32_t oemdevid; /* motherboard EISA ID */ 110 u_int16_t rmbiosseg; /* real-mode BIOS segment */ 111 u_int32_t pmdataseg; /* protected-mode data segment */ 112} __attribute__ ((packed)); 113 114 115/* 116 * Exported lookup results 117 */ 118extern struct bios32_SDentry PCIbios; 119extern struct SMBIOS_table *SMBIOStable; 120extern struct PnPBIOS_table *PnPBIOStable; 121 122struct segment_info { 123 u_int base; 124 u_int limit; 125}; 126 127#define BIOSCODE_FLAG 0x01 128#define BIOSDATA_FLAG 0x02 129#define BIOSUTIL_FLAG 0x04 130#define BIOSARGS_FLAG 0x08 131 132struct bios_segments { 133 u_int generation; 134 struct segment_info code32; /* 32-bit code (mandatory) */ 135 struct segment_info code16; /* 16-bit code */ 136 struct segment_info data; /* 16-bit data */ 137 struct segment_info util; /* 16-bit utility */ 138 struct segment_info args; /* 16-bit args */ 139}; 140 141struct bios_regs { 142 u_int eax; 143 u_int ebx; 144 u_int ecx; 145 u_int edx; 146 u_int esi; 147 u_int edi; 148}; 149 150struct bios_args { 151 u_int entry; /* entry point of routine */ 152 struct bios_regs r; 153 struct bios_segments seg; 154}; 155 156/* 157 * PnP BIOS return codes 158 */ 159#define PNP_SUCCESS 0x00 160#define PNP_NOT_SET_STATICALLY 0x7f 161#define PNP_UNKNOWN_FUNCTION 0x81 162#define PNP_FUNTION_NOT_SUPPORTED 0x82 163#define PNP_INVALID_HANDLE 0x83 164#define PNP_BAD_PARAMETER 0x84 165#define PNP_SET_FAILED 0x85 166#define PNP_EVENTS_NOT_PENDING 0x86 167#define PNP_SYSTEM_NOT_DOCKED 0x87 168#define PNP_NO_ISA_PNP_CARDS 0x88 169#define PNP_UNABLE_TO_DETERMINE_DOCK_CAPABILITIES 0x89 170#define PNP_CONFIG_CHANGE_FAILED_NO_BATTERY 0x8a 171#define PNP_CONFIG_CHANGE_FAILED_RESOURCE_CONFLICT 0x8b 172#define PNP_BUFFER_TOO_SMALL 0x8c 173#define PNP_USE_ESCD_SUPPORT 0x8d 174#define PNP_MESSAGE_NOT_SUPPORTED 0x8e 175#define PNP_HARDWARE_ERROR 0x8f 176 177/* 178 * DMI return codes 179 */ 180#define DMI_SUCCESS 0x00 181#define DMI_UNKNOWN_FUNCTION 0x81 182#define DMI_FUNCTION_NOT_SUPPORTED 0x82 183#define DMI_INVALID_HANDLE 0x83 184#define DMI_BAD_PARAMETER 0x84 185#define DMI_INVALID_SUBFUNCTION 0x85 186#define DMI_NO_CHANGE 0x86 187#define DMI_ADD_STRUCTURE_FAILED 0x87 188#define DMI_READ_ONLY 0x8d 189#define DMI_LOCK_NOT_SUPPORTED 0x90 190#define DMI_CURRENTLY_LOCKED 0x91 191#define DMI_INVALID_LOCK 0x92 192 193/* 194 * format specifiers and defines for bios16() 195 * s = short (16 bits) 196 * i = int (32 bits) 197 * p = pointer (converted to seg:offset) 198 * C,D,U = selector (corresponding to code/data/utility segment) 199 */ 200#define PNP_COUNT_DEVNODES "sppD", 0x00 201#define PNP_GET_DEVNODE "sppsD", 0x01 202#define PNP_SET_DEVNODE "sppsD", 0x02 203#define PNP_GET_EVENT "spD", 0x03 204#define PNP_SEND_MSG "ssD", 0x04 205#define PNP_GET_DOCK_INFO "spD", 0x05 206 207#define PNP_SEL_PRIBOOT "ssiiisspD", 0x07 208#define PNP_GET_PRIBOOT "sspppppD", 0x08 209#define PNP_SET_RESINFO "spD", 0x09 210#define PNP_GET_RESINFO "spD", 0x0A 211#define PNP_GET_APM_ID "sppD", 0x0B 212 213#define PNP_GET_ISA_INFO "spD", 0x40 214#define PNP_GET_ECSD_INFO "spppD", 0x41 215#define PNP_READ_ESCD "spUD", 0x42 216#define PNP_WRITE_ESCD "spUD", 0x43 217 218#define PNP_GET_DMI_INFO "spppppD", 0x50 219#define PNP_GET_DMI_STRUCTURE "sppUD", 0x51 220#define PNP_SET_DMI_STRUCTURE "sppsUD" 0x52 221#define PNP_GET_DMI_CHANGE "spUD" 0x53 222#define PNP_DMI_CONTROL "sspsUD" 0x54 223#define PNP_GET_GPNV_INFO "sppppD" 0x55 224#define PNP_READ_GPNV_DATA "ssppUD" 0x56 225#define PNP_WRITE_GPNV_DATA "sspsUD" 0x57 226 227#define PNP_BOOT_CHECK "sp", 0x60 228#define PNP_COUNT_IPL "sppp", 0x61 229#define PNP_GET_BOOTPRI "spp", 0x62 230#define PNP_SET_BOOTPRI "sp", 0x63 231#define PNP_GET_LASTBOOT "sp", 0x64 232#define PNP_GET_BOOTFIRST "sp", 0x65 233#define PNP_SET_BOOTFIRST "sp", 0x66 234 235extern int bios16(struct bios_args *, char *, ...); 236extern int bios16_call(struct bios_regs *, char *); 237extern int bios32(struct bios_regs *, u_int, u_short); 238extern void set_bios_selectors(struct bios_segments *, int); 239