1 /* $OpenBSD: biosvar.h,v 1.48 2006/05/20 22:36:33 deraadt 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 #pragma pack(1)
32
33 /* some boxes put apm data seg in the 2nd page */
34 #define BOOTARG_OFF (NBPG*2)
35 #define BOOTARG_LEN (NBPG*1)
36 #define BOOTBIOS_ADDR (0x7c00)
37
38 /* BIOS configure flags */
39 #define BIOSF_BIOS32 0x0001
40 #define BIOSF_PCIBIOS 0x0002
41 #define BIOSF_PROMSCAN 0x0004
42 #define BIOSF_SMBIOS 0x0008
43
44 /* BIOS media ID */
45 #define BIOSM_F320K 0xff /* floppy ds/sd 8 spt */
46 #define BIOSM_F160K 0xfe /* floppy ss/sd 8 spt */
47 #define BIOSM_F360K 0xfd /* floppy ds/sd 9 spt */
48 #define BIOSM_F180K 0xfc /* floppy ss/sd 9 spt */
49 #define BIOSM_ROMD 0xfa /* ROM disk */
50 #define BIOSM_F120M 0xf9 /* floppy ds/hd 15 spt 5.25" */
51 #define BIOSM_F720K 0xf9 /* floppy ds/dd 9 spt 3.50" */
52 #define BIOSM_HD 0xf8 /* hard drive */
53 #define BIOSM_F144K 0xf0 /* floppy ds/hd 18 spt 3.50" */
54 #define BIOSM_OTHER 0xf0 /* any other */
55
56 /*
57 * BIOS memory maps
58 */
59 #define BIOS_MAP_END 0x00 /* End of array XXX - special */
60 #define BIOS_MAP_FREE 0x01 /* Usable memory */
61 #define BIOS_MAP_RES 0x02 /* Reserved memory */
62 #define BIOS_MAP_ACPI 0x03 /* ACPI Reclaim memory */
63 #define BIOS_MAP_NVS 0x04 /* ACPI NVS memory */
64
65 /*
66 * Optional ROM header
67 */
68 typedef
69 struct bios_romheader {
70 u_int16_t signature; /* 0xaa55 */
71 u_int8_t len; /* length in pages (512 bytes) */
72 u_int32_t entry; /* initialization entry point */
73 u_int8_t reserved[19];
74 u_int16_t pnpheader; /* offset to PnP expansion header */
75 } *bios_romheader_t;
76
77 /*
78 * BIOS32
79 */
80 typedef
81 struct bios32_header {
82 u_int32_t signature; /* 00: signature "_32_" */
83 u_int32_t entry; /* 04: entry point */
84 u_int8_t rev; /* 08: revision */
85 u_int8_t length; /* 09: header length */
86 u_int8_t cksum; /* 0a: modulo 256 checksum */
87 u_int8_t reserved[5];
88 } *bios32_header_t;
89
90 typedef
91 struct bios32_entry_info {
92 u_int32_t bei_base;
93 u_int32_t bei_size;
94 u_int32_t bei_entry;
95 } *bios32_entry_info_t;
96
97 typedef
98 struct bios32_entry {
99 u_int32_t offset;
100 u_int16_t segment;
101 } *bios32_entry_t;
102
103 #define BIOS32_START 0xe0000
104 #define BIOS32_SIZE 0x20000
105 #define BIOS32_END (BIOS32_START + BIOS32_SIZE - 0x10)
106
107 #define BIOS32_MAKESIG(a, b, c, d) \
108 ((a) | ((b) << 8) | ((c) << 16) | ((d) << 24))
109 #define BIOS32_SIGNATURE BIOS32_MAKESIG('_', '3', '2', '_')
110 #define PCIBIOS_SIGNATURE BIOS32_MAKESIG('$', 'P', 'C', 'I')
111 #define SMBIOS_SIGNATURE BIOS32_MAKESIG('_', 'S', 'M', '_')
112
113 /*
114 * CTL_BIOS definitions.
115 */
116 #define BIOS_DEV 1 /* int: BIOS boot device */
117 #define BIOS_DISKINFO 2 /* struct: BIOS boot device info */
118 #define BIOS_CKSUMLEN 3 /* int: disk cksum block count */
119 #define BIOS_MAXID 4 /* number of valid machdep ids */
120
121 #define CTL_BIOS_NAMES { \
122 { 0, 0 }, \
123 { "biosdev", CTLTYPE_INT }, \
124 { "diskinfo", CTLTYPE_STRUCT }, \
125 { "cksumlen", CTLTYPE_INT }, \
126 }
127
128 #define BOOTARG_MEMMAP 0
129 typedef struct _bios_memmap {
130 u_int64_t addr; /* Beginning of block */
131 u_int64_t size; /* Size of block */
132 u_int32_t type; /* Type of block */
133 } bios_memmap_t;
134
135 /* Info about disk from the bios, plus the mapping from
136 * BIOS numbers to BSD major (driver?) number.
137 *
138 * Also, do not bother with BIOSN*() macros, just parcel
139 * the info out, and use it like this. This makes for less
140 * of a dependance on BIOSN*() macros having to be the same
141 * across /boot, /bsd, and userland.
142 */
143 #define BOOTARG_DISKINFO 1
144 typedef struct _bios_diskinfo {
145 /* BIOS section */
146 int bios_number; /* BIOS number of drive (or -1) */
147 u_int bios_cylinders; /* BIOS cylinders */
148 u_int bios_heads; /* BIOS heads */
149 u_int bios_sectors; /* BIOS sectors */
150 int bios_edd; /* EDD support */
151
152 /* BSD section */
153 dev_t bsd_dev; /* BSD device */
154
155 /* Checksum section */
156 u_int32_t checksum; /* Checksum for drive */
157
158 /* Misc. flags */
159 u_int32_t flags;
160 #define BDI_INVALID 0x00000001 /* I/O error during checksumming */
161 #define BDI_GOODLABEL 0x00000002 /* Had SCSI or ST506/ESDI disklabel */
162 #define BDI_BADLABEL 0x00000004 /* Had another disklabel */
163 #define BDI_EL_TORITO 0x00000008 /* 2,048-byte sectors */
164 #define BDI_PICKED 0x80000000 /* kernel-only: cksum matched */
165
166 } bios_diskinfo_t;
167
168 #define BOOTARG_APMINFO 2
169 typedef struct _bios_apminfo {
170 /* APM_CONNECT returned values */
171 u_int apm_detail;
172 u_int apm_code32_base;
173 u_int apm_code16_base;
174 u_int apm_code_len;
175 u_int apm_data_base;
176 u_int apm_data_len;
177 u_int apm_entry;
178 u_int apm_code16_len;
179 } bios_apminfo_t;
180
181 #define BOOTARG_CKSUMLEN 3 /* u_int32_t */
182
183 #define BOOTARG_PCIINFO 4
184 typedef struct _bios_pciinfo {
185 /* PCI BIOS v2.0+ - Installation check values */
186 u_int32_t pci_chars; /* Characteristics (%eax) */
187 u_int32_t pci_rev; /* BCD Revision (%ebx) */
188 u_int32_t pci_entry32; /* PM entry point for PCI BIOS */
189 u_int32_t pci_lastbus; /* Number of last PCI bus */
190 } bios_pciinfo_t;
191
192 #define BOOTARG_CONSDEV 5
193 typedef struct _bios_consdev {
194 dev_t consdev;
195 int conspeed;
196 } bios_consdev_t;
197
198 #define BOOTARG_SMPINFO 6 /* struct mp_float[] */
199
200 #define BOOTARG_BOOTMAC 7
201 typedef struct _bios_bootmac {
202 char mac[6];
203 } bios_bootmac_t;
204
205 #if defined(_KERNEL) || defined (_STANDALONE)
206
207 #ifdef _LOCORE
208 #define DOINT(n) int $0x20+(n)
209 #else
210 #define DOINT(n) "int $0x20+(" #n ")"
211
212 extern volatile struct BIOS_regs {
213 u_int32_t biosr_ax;
214 u_int32_t biosr_cx;
215 u_int32_t biosr_dx;
216 u_int32_t biosr_bx;
217 u_int32_t biosr_bp;
218 u_int32_t biosr_si;
219 u_int32_t biosr_di;
220 u_int32_t biosr_ds;
221 u_int32_t biosr_es;
222 } BIOS_regs;
223
224 #ifdef _KERNEL
225 #include <machine/bus.h>
226
227 struct bios_attach_args {
228 char *bios_dev;
229 u_int bios_func;
230 bus_space_tag_t bios_iot;
231 bus_space_tag_t bios_memt;
232 union {
233 void *_p;
234 bios_apminfo_t *_bios_apmp;
235 } _;
236 };
237
238 #define bios_apmp _._bios_apmp
239
240 struct consdev;
241 struct proc;
242
243 int bios_sysctl(int *, u_int, void *, size_t *, void *, size_t, struct proc *);
244
245 void bioscnprobe(struct consdev *);
246 void bioscninit(struct consdev *);
247 void bioscnputc(dev_t, int);
248 int bioscngetc(dev_t);
249 void bioscnpollc(dev_t, int);
250 void bios_getopt(void);
251
252 /* bios32.c */
253 int bios32_service(u_int32_t, bios32_entry_t, bios32_entry_info_t);
254
255 extern u_int bootapiver;
256 extern bios_memmap_t *bios_memmap;
257 extern void *bios_smpinfo;
258 extern bios_pciinfo_t *bios_pciinfo;
259
260 #endif /* _KERNEL */
261 #endif /* _LOCORE */
262 #endif /* _KERNEL || _STANDALONE */
263
264 #pragma pack()
265 #endif /* _I386_BIOSVAR_H_ */