Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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FreeBSD/Linux Kernel Cross Reference
sys/i386/include/pc/bios.h
Version:
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1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 1997 Michael Smith 5 * Copyright (c) 1998 Jonathan Lemon 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * $FreeBSD$ 30 */ 31 32 #ifndef _MACHINE_PC_BIOS_H_ 33 #define _MACHINE_PC_BIOS_H_ 34 35 /* 36 * Signature structure for the BIOS32 Service Directory header 37 */ 38 struct bios32_SDheader 39 { 40 u_int8_t sig[4]; 41 u_int32_t entry; 42 u_int8_t revision; 43 u_int8_t len; 44 u_int8_t cksum; 45 u_int8_t pad[5]; 46 }; 47 48 /* 49 * PnP BIOS presence structure 50 */ 51 struct PnPBIOS_table 52 { 53 u_int8_t sig[4]; /* "$PnP */ 54 u_int8_t version; /* should be 0x10 */ 55 u_int8_t len; /* total structure length */ 56 u_int16_t control; /* BIOS feature flags */ 57 u_int8_t cksum; /* checksum */ 58 u_int32_t evflagaddr; /* address of event notificaton flag */ 59 u_int16_t rmentryoffset; /* real-mode entry offset */ 60 u_int16_t rmentryseg; /* segment */ 61 u_int16_t pmentryoffset; /* protected-mode entry offset */ 62 u_int32_t pmentrybase; /* segment base */ 63 u_int32_t oemdevid; /* motherboard EISA ID */ 64 u_int16_t rmbiosseg; /* real-mode BIOS segment */ 65 u_int32_t pmdataseg; /* protected-mode data segment */ 66 } __packed; 67 68 /* 69 * PnP BIOS return codes 70 */ 71 #define PNP_SUCCESS 0x00 72 #define PNP_NOT_SET_STATICALLY 0x7f 73 #define PNP_UNKNOWN_FUNCTION 0x81 74 #define PNP_FUNCTION_NOT_SUPPORTED 0x82 75 #define PNP_INVALID_HANDLE 0x83 76 #define PNP_BAD_PARAMETER 0x84 77 #define PNP_SET_FAILED 0x85 78 #define PNP_EVENTS_NOT_PENDING 0x86 79 #define PNP_SYSTEM_NOT_DOCKED 0x87 80 #define PNP_NO_ISA_PNP_CARDS 0x88 81 #define PNP_UNABLE_TO_DETERMINE_DOCK_CAPABILITIES 0x89 82 #define PNP_CONFIG_CHANGE_FAILED_NO_BATTERY 0x8a 83 #define PNP_CONFIG_CHANGE_FAILED_RESOURCE_CONFLICT 0x8b 84 #define PNP_BUFFER_TOO_SMALL 0x8c 85 #define PNP_USE_ESCD_SUPPORT 0x8d 86 #define PNP_MESSAGE_NOT_SUPPORTED 0x8e 87 #define PNP_HARDWARE_ERROR 0x8f 88 89 /* 90 * DMI return codes 91 */ 92 #define DMI_SUCCESS 0x00 93 #define DMI_UNKNOWN_FUNCTION 0x81 94 #define DMI_FUNCTION_NOT_SUPPORTED 0x82 95 #define DMI_INVALID_HANDLE 0x83 96 #define DMI_BAD_PARAMETER 0x84 97 #define DMI_INVALID_SUBFUNCTION 0x85 98 #define DMI_NO_CHANGE 0x86 99 #define DMI_ADD_STRUCTURE_FAILED 0x87 100 #define DMI_READ_ONLY 0x8d 101 #define DMI_LOCK_NOT_SUPPORTED 0x90 102 #define DMI_CURRENTLY_LOCKED 0x91 103 #define DMI_INVALID_LOCK 0x92 104 105 /* 106 * format specifiers and defines for bios16() 107 * s = short (16 bits) 108 * i = int (32 bits) 109 * p = pointer (converted to seg:offset) 110 * C,D,U = selector (corresponding to code/data/utility segment) 111 */ 112 #define PNP_COUNT_DEVNODES "sppD", 0x00 113 #define PNP_GET_DEVNODE "sppsD", 0x01 114 #define PNP_SET_DEVNODE "sspsD", 0x02 115 #define PNP_GET_EVENT "spD", 0x03 116 #define PNP_SEND_MSG "ssD", 0x04 117 #define PNP_GET_DOCK_INFO "spD", 0x05 118 119 #define PNP_SEL_PRIBOOT "ssiiisspD", 0x07 120 #define PNP_GET_PRIBOOT "sspppppD", 0x08 121 #define PNP_SET_RESINFO "spD", 0x09 122 #define PNP_GET_RESINFO "spD", 0x0A 123 #define PNP_GET_APM_ID "sppD", 0x0B 124 125 #define PNP_GET_ISA_INFO "spD", 0x40 126 #define PNP_GET_ECSD_INFO "spppD", 0x41 127 #define PNP_READ_ESCD "spUD", 0x42 128 #define PNP_WRITE_ESCD "spUD", 0x43 129 130 #define PNP_GET_DMI_INFO "spppppD", 0x50 131 #define PNP_GET_DMI_STRUCTURE "sppUD", 0x51 132 #define PNP_SET_DMI_STRUCTURE "sppsUD" 0x52 133 #define PNP_GET_DMI_CHANGE "spUD" 0x53 134 #define PNP_DMI_CONTROL "sspsUD" 0x54 135 #define PNP_GET_GPNV_INFO "sppppD" 0x55 136 #define PNP_READ_GPNV_DATA "ssppUD" 0x56 137 #define PNP_WRITE_GPNV_DATA "sspsUD" 0x57 138 139 #define PNP_BOOT_CHECK "sp", 0x60 140 #define PNP_COUNT_IPL "sppp", 0x61 141 #define PNP_GET_BOOTPRI "spp", 0x62 142 #define PNP_SET_BOOTPRI "sp", 0x63 143 #define PNP_GET_LASTBOOT "sp", 0x64 144 #define PNP_GET_BOOTFIRST "sp", 0x65 145 #define PNP_SET_BOOTFIRST "sp", 0x66 146 147 /* 148 * PCI BIOS functions 149 */ 150 #define PCIBIOS_BIOS_PRESENT 0xb101 151 #define PCIBIOS_READ_CONFIG_BYTE 0xb108 152 #define PCIBIOS_READ_CONFIG_WORD 0xb109 153 #define PCIBIOS_READ_CONFIG_DWORD 0xb10a 154 #define PCIBIOS_WRITE_CONFIG_BYTE 0xb10b 155 #define PCIBIOS_WRITE_CONFIG_WORD 0xb10c 156 #define PCIBIOS_WRITE_CONFIG_DWORD 0xb10d 157 #define PCIBIOS_GET_IRQ_ROUTING 0xb10e 158 #define PCIBIOS_ROUTE_INTERRUPT 0xb10f 159 160 /* 161 * PCI interrupt routing table. 162 * 163 * $PIR in the BIOS segment contains a PIR_table 164 * int 1a:b106 returns PIR_table in buffer at es:(e)di 165 * int 1a:b18e returns PIR_table in buffer at es:(e)di 166 * int 1a:b406 returns es:di pointing to the BIOS PIR_table 167 */ 168 struct PIR_header 169 { 170 int8_t ph_signature[4]; 171 u_int16_t ph_version; 172 u_int16_t ph_length; 173 u_int8_t ph_router_bus; 174 u_int8_t ph_router_dev_fn; 175 u_int16_t ph_pci_irqs; 176 u_int16_t ph_router_vendor; 177 u_int16_t ph_router_device; 178 u_int32_t ph_miniport; 179 u_int8_t ph_res[11]; 180 u_int8_t ph_checksum; 181 } __packed; 182 183 struct PIR_intpin 184 { 185 u_int8_t link; 186 u_int16_t irqs; 187 } __packed; 188 189 struct PIR_entry 190 { 191 u_int8_t pe_bus; 192 u_int8_t pe_res1:3; 193 u_int8_t pe_device:5; 194 struct PIR_intpin pe_intpin[4]; 195 u_int8_t pe_slot; 196 u_int8_t pe_res3; 197 } __packed; 198 199 struct PIR_table 200 { 201 struct PIR_header pt_header; 202 struct PIR_entry pt_entry[0]; 203 } __packed; 204 205 /* 206 * Int 15:E820 'SMAP' structure 207 */ 208 #define SMAP_SIG 0x534D4150 /* 'SMAP' */ 209 210 #define SMAP_TYPE_MEMORY 1 211 #define SMAP_TYPE_RESERVED 2 212 #define SMAP_TYPE_ACPI_RECLAIM 3 213 #define SMAP_TYPE_ACPI_NVS 4 214 #define SMAP_TYPE_ACPI_ERROR 5 215 #define SMAP_TYPE_DISABLED 6 216 #define SMAP_TYPE_PMEM 7 217 #define SMAP_TYPE_PRAM 12 218 219 #define SMAP_XATTR_ENABLED 0x00000001 220 #define SMAP_XATTR_NON_VOLATILE 0x00000002 221 #define SMAP_XATTR_MASK (SMAP_XATTR_ENABLED | SMAP_XATTR_NON_VOLATILE) 222 223 struct bios_smap { 224 u_int64_t base; 225 u_int64_t length; 226 u_int32_t type; 227 } __packed; 228 229 /* Structure extended to include extended attribute field in ACPI 3.0. */ 230 struct bios_smap_xattr { 231 u_int64_t base; 232 u_int64_t length; 233 u_int32_t type; 234 u_int32_t xattr; 235 } __packed; 236 237 /* 238 * System Management BIOS 239 */ 240 #define SMBIOS_START 0xf0000 241 #define SMBIOS_STEP 0x10 242 #define SMBIOS_OFF 0 243 #define SMBIOS_LEN 4 244 #define SMBIOS_SIG "_SM_" 245 246 struct smbios_eps { 247 uint8_t anchor_string[4]; /* '_SM_' */ 248 uint8_t checksum; 249 uint8_t length; 250 uint8_t major_version; 251 uint8_t minor_version; 252 uint16_t maximum_structure_size; 253 uint8_t entry_point_revision; 254 uint8_t formatted_area[5]; 255 uint8_t intermediate_anchor_string[5]; /* '_DMI_' */ 256 uint8_t intermediate_checksum; 257 uint16_t structure_table_length; 258 uint32_t structure_table_address; 259 uint16_t number_structures; 260 uint8_t BCD_revision; 261 }; 262 263 struct smbios_structure_header { 264 uint8_t type; 265 uint8_t length; 266 uint16_t handle; 267 }; 268 269 #ifdef _KERNEL 270 #define BIOS_PADDRTOVADDR(x) ((x) + PMAP_MAP_LOW) 271 #define BIOS_VADDRTOPADDR(x) ((x) - PMAP_MAP_LOW) 272 273 struct bios_oem_signature { 274 char * anchor; /* search anchor string in BIOS memory */ 275 size_t offset; /* offset from anchor (may be negative) */ 276 size_t totlen; /* total length of BIOS string to copy */ 277 } __packed; 278 279 struct bios_oem_range { 280 u_int from; /* shouldn't be below 0xe0000 */ 281 u_int to; /* shouldn't be above 0xfffff */ 282 } __packed; 283 284 struct bios_oem { 285 struct bios_oem_range range; 286 struct bios_oem_signature signature[]; 287 } __packed; 288 289 struct segment_info { 290 u_int base; 291 u_int limit; 292 }; 293 294 #define BIOSCODE_FLAG 0x01 295 #define BIOSDATA_FLAG 0x02 296 #define BIOSUTIL_FLAG 0x04 297 #define BIOSARGS_FLAG 0x08 298 299 struct bios_segments { 300 struct segment_info code32; /* 32-bit code (mandatory) */ 301 struct segment_info code16; /* 16-bit code */ 302 struct segment_info data; /* 16-bit data */ 303 struct segment_info util; /* 16-bit utility */ 304 struct segment_info args; /* 16-bit args */ 305 }; 306 307 struct bios_regs { 308 u_int eax; 309 u_int ebx; 310 u_int ecx; 311 u_int edx; 312 u_int esi; 313 u_int edi; 314 }; 315 316 struct bios_args { 317 u_int entry; /* entry point of routine */ 318 struct bios_regs r; 319 struct bios_segments seg; 320 }; 321 322 /* 323 * BIOS32 Service Directory entry. Caller supplies name, bios32_SDlookup 324 * fills in the rest of the details. 325 */ 326 struct bios32_SDentry 327 { 328 union 329 { 330 u_int8_t name[4]; /* service identifier */ 331 u_int32_t id; /* as a 32-bit value */ 332 } ident; 333 u_int32_t base; /* base of service */ 334 u_int32_t len; /* service length */ 335 u_int32_t entry; /* entrypoint offset from base */ 336 vm_offset_t ventry; /* entrypoint in kernel virtual segment */ 337 }; 338 339 /* 340 * Exported lookup results 341 */ 342 extern struct bios32_SDentry PCIbios; 343 344 int bios_oem_strings(struct bios_oem *oem, u_char *buffer, size_t maxlen); 345 uint32_t bios_sigsearch(uint32_t start, u_char *sig, int siglen, int paralen, 346 int sigofs); 347 int bios16(struct bios_args *, char *, ...); 348 int bios16_call(struct bios_regs *, char *); 349 int bios32(struct bios_regs *, u_int, u_short); 350 int bios32_SDlookup(struct bios32_SDentry *ent); 351 void set_bios_selectors(struct bios_segments *, int); 352 353 #endif 354 355 #endif /* _MACHINE_PC_BIOS_H_ */
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