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 * 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 * $FreeBSD: releng/10.1/sys/i386/include/pc/bios.h 241027 2012-09-28 11:59:32Z jhb $ 28 */ 29 30 #ifndef _MACHINE_PC_BIOS_H_ 31 #define _MACHINE_PC_BIOS_H_ 32 33 /* 34 * Signature structure for the BIOS32 Service Directory header 35 */ 36 struct bios32_SDheader 37 { 38 u_int8_t sig[4]; 39 u_int32_t entry; 40 u_int8_t revision; 41 u_int8_t len; 42 u_int8_t cksum; 43 u_int8_t pad[5]; 44 }; 45 46 /* 47 * PnP BIOS presence structure 48 */ 49 struct PnPBIOS_table 50 { 51 u_int8_t sig[4]; /* "$PnP */ 52 u_int8_t version; /* should be 0x10 */ 53 u_int8_t len; /* total structure length */ 54 u_int16_t control; /* BIOS feature flags */ 55 u_int8_t cksum; /* checksum */ 56 u_int32_t evflagaddr; /* address of event notificaton flag */ 57 u_int16_t rmentryoffset; /* real-mode entry offset */ 58 u_int16_t rmentryseg; /* segment */ 59 u_int16_t pmentryoffset; /* protected-mode entry offset */ 60 u_int32_t pmentrybase; /* segment base */ 61 u_int32_t oemdevid; /* motherboard EISA ID */ 62 u_int16_t rmbiosseg; /* real-mode BIOS segment */ 63 u_int32_t pmdataseg; /* protected-mode data segment */ 64 } __packed; 65 66 /* 67 * PnP BIOS return codes 68 */ 69 #define PNP_SUCCESS 0x00 70 #define PNP_NOT_SET_STATICALLY 0x7f 71 #define PNP_UNKNOWN_FUNCTION 0x81 72 #define PNP_FUNCTION_NOT_SUPPORTED 0x82 73 #define PNP_INVALID_HANDLE 0x83 74 #define PNP_BAD_PARAMETER 0x84 75 #define PNP_SET_FAILED 0x85 76 #define PNP_EVENTS_NOT_PENDING 0x86 77 #define PNP_SYSTEM_NOT_DOCKED 0x87 78 #define PNP_NO_ISA_PNP_CARDS 0x88 79 #define PNP_UNABLE_TO_DETERMINE_DOCK_CAPABILITIES 0x89 80 #define PNP_CONFIG_CHANGE_FAILED_NO_BATTERY 0x8a 81 #define PNP_CONFIG_CHANGE_FAILED_RESOURCE_CONFLICT 0x8b 82 #define PNP_BUFFER_TOO_SMALL 0x8c 83 #define PNP_USE_ESCD_SUPPORT 0x8d 84 #define PNP_MESSAGE_NOT_SUPPORTED 0x8e 85 #define PNP_HARDWARE_ERROR 0x8f 86 87 /* 88 * DMI return codes 89 */ 90 #define DMI_SUCCESS 0x00 91 #define DMI_UNKNOWN_FUNCTION 0x81 92 #define DMI_FUNCTION_NOT_SUPPORTED 0x82 93 #define DMI_INVALID_HANDLE 0x83 94 #define DMI_BAD_PARAMETER 0x84 95 #define DMI_INVALID_SUBFUNCTION 0x85 96 #define DMI_NO_CHANGE 0x86 97 #define DMI_ADD_STRUCTURE_FAILED 0x87 98 #define DMI_READ_ONLY 0x8d 99 #define DMI_LOCK_NOT_SUPPORTED 0x90 100 #define DMI_CURRENTLY_LOCKED 0x91 101 #define DMI_INVALID_LOCK 0x92 102 103 /* 104 * format specifiers and defines for bios16() 105 * s = short (16 bits) 106 * i = int (32 bits) 107 * p = pointer (converted to seg:offset) 108 * C,D,U = selector (corresponding to code/data/utility segment) 109 */ 110 #define PNP_COUNT_DEVNODES "sppD", 0x00 111 #define PNP_GET_DEVNODE "sppsD", 0x01 112 #define PNP_SET_DEVNODE "sspsD", 0x02 113 #define PNP_GET_EVENT "spD", 0x03 114 #define PNP_SEND_MSG "ssD", 0x04 115 #define PNP_GET_DOCK_INFO "spD", 0x05 116 117 #define PNP_SEL_PRIBOOT "ssiiisspD", 0x07 118 #define PNP_GET_PRIBOOT "sspppppD", 0x08 119 #define PNP_SET_RESINFO "spD", 0x09 120 #define PNP_GET_RESINFO "spD", 0x0A 121 #define PNP_GET_APM_ID "sppD", 0x0B 122 123 #define PNP_GET_ISA_INFO "spD", 0x40 124 #define PNP_GET_ECSD_INFO "spppD", 0x41 125 #define PNP_READ_ESCD "spUD", 0x42 126 #define PNP_WRITE_ESCD "spUD", 0x43 127 128 #define PNP_GET_DMI_INFO "spppppD", 0x50 129 #define PNP_GET_DMI_STRUCTURE "sppUD", 0x51 130 #define PNP_SET_DMI_STRUCTURE "sppsUD" 0x52 131 #define PNP_GET_DMI_CHANGE "spUD" 0x53 132 #define PNP_DMI_CONTROL "sspsUD" 0x54 133 #define PNP_GET_GPNV_INFO "sppppD" 0x55 134 #define PNP_READ_GPNV_DATA "ssppUD" 0x56 135 #define PNP_WRITE_GPNV_DATA "sspsUD" 0x57 136 137 #define PNP_BOOT_CHECK "sp", 0x60 138 #define PNP_COUNT_IPL "sppp", 0x61 139 #define PNP_GET_BOOTPRI "spp", 0x62 140 #define PNP_SET_BOOTPRI "sp", 0x63 141 #define PNP_GET_LASTBOOT "sp", 0x64 142 #define PNP_GET_BOOTFIRST "sp", 0x65 143 #define PNP_SET_BOOTFIRST "sp", 0x66 144 145 /* 146 * PCI BIOS functions 147 */ 148 #define PCIBIOS_BIOS_PRESENT 0xb101 149 #define PCIBIOS_READ_CONFIG_BYTE 0xb108 150 #define PCIBIOS_READ_CONFIG_WORD 0xb109 151 #define PCIBIOS_READ_CONFIG_DWORD 0xb10a 152 #define PCIBIOS_WRITE_CONFIG_BYTE 0xb10b 153 #define PCIBIOS_WRITE_CONFIG_WORD 0xb10c 154 #define PCIBIOS_WRITE_CONFIG_DWORD 0xb10d 155 #define PCIBIOS_GET_IRQ_ROUTING 0xb10e 156 #define PCIBIOS_ROUTE_INTERRUPT 0xb10f 157 158 /* 159 * PCI interrupt routing table. 160 * 161 * $PIR in the BIOS segment contains a PIR_table 162 * int 1a:b106 returns PIR_table in buffer at es:(e)di 163 * int 1a:b18e returns PIR_table in buffer at es:(e)di 164 * int 1a:b406 returns es:di pointing to the BIOS PIR_table 165 */ 166 struct PIR_header 167 { 168 int8_t ph_signature[4]; 169 u_int16_t ph_version; 170 u_int16_t ph_length; 171 u_int8_t ph_router_bus; 172 u_int8_t ph_router_dev_fn; 173 u_int16_t ph_pci_irqs; 174 u_int16_t ph_router_vendor; 175 u_int16_t ph_router_device; 176 u_int32_t ph_miniport; 177 u_int8_t ph_res[11]; 178 u_int8_t ph_checksum; 179 } __packed; 180 181 struct PIR_intpin 182 { 183 u_int8_t link; 184 u_int16_t irqs; 185 } __packed; 186 187 struct PIR_entry 188 { 189 u_int8_t pe_bus; 190 u_int8_t pe_res1:3; 191 u_int8_t pe_device:5; 192 struct PIR_intpin pe_intpin[4]; 193 u_int8_t pe_slot; 194 u_int8_t pe_res3; 195 } __packed; 196 197 struct PIR_table 198 { 199 struct PIR_header pt_header; 200 struct PIR_entry pt_entry[0]; 201 } __packed; 202 203 /* 204 * Int 15:E820 'SMAP' structure 205 */ 206 #define SMAP_SIG 0x534D4150 /* 'SMAP' */ 207 208 #define SMAP_TYPE_MEMORY 1 209 #define SMAP_TYPE_RESERVED 2 210 #define SMAP_TYPE_ACPI_RECLAIM 3 211 #define SMAP_TYPE_ACPI_NVS 4 212 #define SMAP_TYPE_ACPI_ERROR 5 213 214 #define SMAP_XATTR_ENABLED 0x00000001 215 #define SMAP_XATTR_NON_VOLATILE 0x00000002 216 #define SMAP_XATTR_MASK (SMAP_XATTR_ENABLED | SMAP_XATTR_NON_VOLATILE) 217 218 struct bios_smap { 219 u_int64_t base; 220 u_int64_t length; 221 u_int32_t type; 222 } __packed; 223 224 /* 225 * System Management BIOS 226 */ 227 #define SMBIOS_START 0xf0000 228 #define SMBIOS_STEP 0x10 229 #define SMBIOS_OFF 0 230 #define SMBIOS_LEN 4 231 #define SMBIOS_SIG "_SM_" 232 233 struct smbios_eps { 234 uint8_t anchor_string[4]; /* '_SM_' */ 235 uint8_t checksum; 236 uint8_t length; 237 uint8_t major_version; 238 uint8_t minor_version; 239 uint16_t maximum_structure_size; 240 uint8_t entry_point_revision; 241 uint8_t formatted_area[5]; 242 uint8_t intermediate_anchor_string[5]; /* '_DMI_' */ 243 uint8_t intermediate_checksum; 244 uint16_t structure_table_length; 245 uint32_t structure_table_address; 246 uint16_t number_structures; 247 uint8_t BCD_revision; 248 }; 249 250 struct smbios_structure_header { 251 uint8_t type; 252 uint8_t length; 253 uint16_t handle; 254 }; 255 256 #ifdef _KERNEL 257 #define BIOS_PADDRTOVADDR(x) ((x) + KERNBASE) 258 #define BIOS_VADDRTOPADDR(x) ((x) - KERNBASE) 259 260 struct bios_oem_signature { 261 char * anchor; /* search anchor string in BIOS memory */ 262 size_t offset; /* offset from anchor (may be negative) */ 263 size_t totlen; /* total length of BIOS string to copy */ 264 } __packed; 265 266 struct bios_oem_range { 267 u_int from; /* shouldn't be below 0xe0000 */ 268 u_int to; /* shouldn't be above 0xfffff */ 269 } __packed; 270 271 struct bios_oem { 272 struct bios_oem_range range; 273 struct bios_oem_signature signature[]; 274 } __packed; 275 276 struct segment_info { 277 u_int base; 278 u_int limit; 279 }; 280 281 #define BIOSCODE_FLAG 0x01 282 #define BIOSDATA_FLAG 0x02 283 #define BIOSUTIL_FLAG 0x04 284 #define BIOSARGS_FLAG 0x08 285 286 struct bios_segments { 287 struct segment_info code32; /* 32-bit code (mandatory) */ 288 struct segment_info code16; /* 16-bit code */ 289 struct segment_info data; /* 16-bit data */ 290 struct segment_info util; /* 16-bit utility */ 291 struct segment_info args; /* 16-bit args */ 292 }; 293 294 struct bios_regs { 295 u_int eax; 296 u_int ebx; 297 u_int ecx; 298 u_int edx; 299 u_int esi; 300 u_int edi; 301 }; 302 303 struct bios_args { 304 u_int entry; /* entry point of routine */ 305 struct bios_regs r; 306 struct bios_segments seg; 307 }; 308 309 /* 310 * BIOS32 Service Directory entry. Caller supplies name, bios32_SDlookup 311 * fills in the rest of the details. 312 */ 313 struct bios32_SDentry 314 { 315 union 316 { 317 u_int8_t name[4]; /* service identifier */ 318 u_int32_t id; /* as a 32-bit value */ 319 } ident; 320 u_int32_t base; /* base of service */ 321 u_int32_t len; /* service length */ 322 u_int32_t entry; /* entrypoint offset from base */ 323 vm_offset_t ventry; /* entrypoint in kernel virtual segment */ 324 }; 325 326 /* 327 * Exported lookup results 328 */ 329 extern struct bios32_SDentry PCIbios; 330 331 int bios_oem_strings(struct bios_oem *oem, u_char *buffer, size_t maxlen); 332 uint32_t bios_sigsearch(uint32_t start, u_char *sig, int siglen, int paralen, 333 int sigofs); 334 int bios16(struct bios_args *, char *, ...); 335 int bios16_call(struct bios_regs *, char *); 336 int bios32(struct bios_regs *, u_int, u_short); 337 int bios32_SDlookup(struct bios32_SDentry *ent); 338 void set_bios_selectors(struct bios_segments *, int); 339 340 #endif 341 342 #endif /* _MACHINE_PC_BIOS_H_ */
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