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
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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 * $FreeBSD$ 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 * BIOS32 Service Directory entry. Caller supplies name, bios32_SDlookup 48 * fills in the rest of the details. 49 */ 50 struct bios32_SDentry 51 { 52 union 53 { 54 u_int8_t name[4]; /* service identifier */ 55 u_int32_t id; /* as a 32-bit value */ 56 } ident; 57 u_int32_t base; /* base of service */ 58 u_int32_t len; /* service length */ 59 u_int32_t entry; /* entrypoint offset from base */ 60 vm_offset_t ventry; /* entrypoint in kernel virtual segment */ 61 }; 62 63 extern int bios32_SDlookup(struct bios32_SDentry *ent); 64 extern u_int32_t bios_sigsearch(u_int32_t start, u_char *sig, int siglen, 65 int paralen, int sigofs); 66 67 #define BIOS_PADDRTOVADDR(x) ((x) + KERNBASE) 68 #define BIOS_VADDRTOPADDR(x) ((x) - KERNBASE) 69 70 71 /* 72 * PnP BIOS presence structure 73 */ 74 struct PnPBIOS_table 75 { 76 u_int8_t sig[4]; /* "$PnP */ 77 u_int8_t version; /* should be 0x10 */ 78 u_int8_t len; /* total structure length */ 79 u_int16_t control; /* BIOS feature flags */ 80 u_int8_t cksum; /* checksum */ 81 u_int32_t evflagaddr; /* address of event notificaton flag */ 82 u_int16_t rmentryoffset; /* real-mode entry offset */ 83 u_int16_t rmentryseg; /* segment */ 84 u_int16_t pmentryoffset; /* protected-mode entry offset */ 85 u_int32_t pmentrybase; /* segment base */ 86 u_int32_t oemdevid; /* motherboard EISA ID */ 87 u_int16_t rmbiosseg; /* real-mode BIOS segment */ 88 u_int32_t pmdataseg; /* protected-mode data segment */ 89 } __packed; 90 91 92 /* 93 * Exported lookup results 94 */ 95 extern struct bios32_SDentry PCIbios; 96 97 struct segment_info { 98 u_int base; 99 u_int limit; 100 }; 101 102 #define BIOSCODE_FLAG 0x01 103 #define BIOSDATA_FLAG 0x02 104 #define BIOSUTIL_FLAG 0x04 105 #define BIOSARGS_FLAG 0x08 106 107 struct bios_segments { 108 struct segment_info code32; /* 32-bit code (mandatory) */ 109 struct segment_info code16; /* 16-bit code */ 110 struct segment_info data; /* 16-bit data */ 111 struct segment_info util; /* 16-bit utility */ 112 struct segment_info args; /* 16-bit args */ 113 }; 114 115 struct bios_regs { 116 u_int eax; 117 u_int ebx; 118 u_int ecx; 119 u_int edx; 120 u_int esi; 121 u_int edi; 122 }; 123 124 struct bios_args { 125 u_int entry; /* entry point of routine */ 126 struct bios_regs r; 127 struct bios_segments seg; 128 }; 129 130 /* 131 * PnP BIOS return codes 132 */ 133 #define PNP_SUCCESS 0x00 134 #define PNP_NOT_SET_STATICALLY 0x7f 135 #define PNP_UNKNOWN_FUNCTION 0x81 136 #define PNP_FUNTION_NOT_SUPPORTED 0x82 137 #define PNP_INVALID_HANDLE 0x83 138 #define PNP_BAD_PARAMETER 0x84 139 #define PNP_SET_FAILED 0x85 140 #define PNP_EVENTS_NOT_PENDING 0x86 141 #define PNP_SYSTEM_NOT_DOCKED 0x87 142 #define PNP_NO_ISA_PNP_CARDS 0x88 143 #define PNP_UNABLE_TO_DETERMINE_DOCK_CAPABILITIES 0x89 144 #define PNP_CONFIG_CHANGE_FAILED_NO_BATTERY 0x8a 145 #define PNP_CONFIG_CHANGE_FAILED_RESOURCE_CONFLICT 0x8b 146 #define PNP_BUFFER_TOO_SMALL 0x8c 147 #define PNP_USE_ESCD_SUPPORT 0x8d 148 #define PNP_MESSAGE_NOT_SUPPORTED 0x8e 149 #define PNP_HARDWARE_ERROR 0x8f 150 151 /* 152 * DMI return codes 153 */ 154 #define DMI_SUCCESS 0x00 155 #define DMI_UNKNOWN_FUNCTION 0x81 156 #define DMI_FUNCTION_NOT_SUPPORTED 0x82 157 #define DMI_INVALID_HANDLE 0x83 158 #define DMI_BAD_PARAMETER 0x84 159 #define DMI_INVALID_SUBFUNCTION 0x85 160 #define DMI_NO_CHANGE 0x86 161 #define DMI_ADD_STRUCTURE_FAILED 0x87 162 #define DMI_READ_ONLY 0x8d 163 #define DMI_LOCK_NOT_SUPPORTED 0x90 164 #define DMI_CURRENTLY_LOCKED 0x91 165 #define DMI_INVALID_LOCK 0x92 166 167 /* 168 * format specifiers and defines for bios16() 169 * s = short (16 bits) 170 * i = int (32 bits) 171 * p = pointer (converted to seg:offset) 172 * C,D,U = selector (corresponding to code/data/utility segment) 173 */ 174 #define PNP_COUNT_DEVNODES "sppD", 0x00 175 #define PNP_GET_DEVNODE "sppsD", 0x01 176 #define PNP_SET_DEVNODE "sspsD", 0x02 177 #define PNP_GET_EVENT "spD", 0x03 178 #define PNP_SEND_MSG "ssD", 0x04 179 #define PNP_GET_DOCK_INFO "spD", 0x05 180 181 #define PNP_SEL_PRIBOOT "ssiiisspD", 0x07 182 #define PNP_GET_PRIBOOT "sspppppD", 0x08 183 #define PNP_SET_RESINFO "spD", 0x09 184 #define PNP_GET_RESINFO "spD", 0x0A 185 #define PNP_GET_APM_ID "sppD", 0x0B 186 187 #define PNP_GET_ISA_INFO "spD", 0x40 188 #define PNP_GET_ECSD_INFO "spppD", 0x41 189 #define PNP_READ_ESCD "spUD", 0x42 190 #define PNP_WRITE_ESCD "spUD", 0x43 191 192 #define PNP_GET_DMI_INFO "spppppD", 0x50 193 #define PNP_GET_DMI_STRUCTURE "sppUD", 0x51 194 #define PNP_SET_DMI_STRUCTURE "sppsUD" 0x52 195 #define PNP_GET_DMI_CHANGE "spUD" 0x53 196 #define PNP_DMI_CONTROL "sspsUD" 0x54 197 #define PNP_GET_GPNV_INFO "sppppD" 0x55 198 #define PNP_READ_GPNV_DATA "ssppUD" 0x56 199 #define PNP_WRITE_GPNV_DATA "sspsUD" 0x57 200 201 #define PNP_BOOT_CHECK "sp", 0x60 202 #define PNP_COUNT_IPL "sppp", 0x61 203 #define PNP_GET_BOOTPRI "spp", 0x62 204 #define PNP_SET_BOOTPRI "sp", 0x63 205 #define PNP_GET_LASTBOOT "sp", 0x64 206 #define PNP_GET_BOOTFIRST "sp", 0x65 207 #define PNP_SET_BOOTFIRST "sp", 0x66 208 209 /* 210 * PCI BIOS functions 211 */ 212 #define PCIBIOS_BIOS_PRESENT 0xb101 213 #define PCIBIOS_READ_CONFIG_BYTE 0xb108 214 #define PCIBIOS_READ_CONFIG_WORD 0xb109 215 #define PCIBIOS_READ_CONFIG_DWORD 0xb10a 216 #define PCIBIOS_WRITE_CONFIG_BYTE 0xb10b 217 #define PCIBIOS_WRITE_CONFIG_WORD 0xb10c 218 #define PCIBIOS_WRITE_CONFIG_DWORD 0xb10d 219 #define PCIBIOS_GET_IRQ_ROUTING 0xb10e 220 #define PCIBIOS_ROUTE_INTERRUPT 0xb10f 221 222 extern int bios16(struct bios_args *, char *, ...); 223 extern int bios16_call(struct bios_regs *, char *); 224 extern int bios32(struct bios_regs *, u_int, u_short); 225 extern void set_bios_selectors(struct bios_segments *, int); 226 227 /* 228 * PCI interrupt routing table. 229 * 230 * $PIR in the BIOS segment contains a PIR_table 231 * int 1a:b106 returns PIR_table in buffer at es:(e)di 232 * int 1a:b18e returns PIR_table in buffer at es:(e)di 233 * int 1a:b406 returns es:di pointing to the BIOS PIR_table 234 */ 235 struct PIR_header 236 { 237 int8_t ph_signature[4]; 238 u_int16_t ph_version; 239 u_int16_t ph_length; 240 u_int8_t ph_router_bus; 241 u_int8_t ph_router_dev_fn; 242 u_int16_t ph_pci_irqs; 243 u_int16_t ph_router_vendor; 244 u_int16_t ph_router_device; 245 u_int32_t ph_miniport; 246 u_int8_t ph_res[11]; 247 u_int8_t ph_checksum; 248 } __packed; 249 250 struct PIR_intpin 251 { 252 u_int8_t link; 253 u_int16_t irqs; 254 } __packed; 255 256 struct PIR_entry 257 { 258 u_int8_t pe_bus; 259 u_int8_t pe_res1:3; 260 u_int8_t pe_device:5; 261 struct PIR_intpin pe_intpin[4]; 262 u_int8_t pe_slot; 263 u_int8_t pe_res3; 264 } __packed; 265 266 struct PIR_table 267 { 268 struct PIR_header pt_header; 269 struct PIR_entry pt_entry[0]; 270 } __packed; 271 272 /* 273 * Int 15:E820 'SMAP' structure 274 * 275 * XXX add constants for type 276 */ 277 #define SMAP_SIG 0x534D4150 /* 'SMAP' */ 278 struct bios_smap { 279 u_int64_t base; 280 u_int64_t length; 281 u_int32_t type; 282 } __packed; 283 284 const u_char *bios_string(u_int from, u_int to, const u_char *string, int len); 285 286 287 #endif /* _MACHINE_PC_BIOS_H_ */
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