biosvar.h revision 1.57 
1/*	$OpenBSD: biosvar.h,v 1.57 2012/01/11 15:58:27 jsing 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 _MACHINE_BIOSVAR_H_
30#define _MACHINE_BIOSVAR_H_
31
32	/* some boxes put apm data seg in the 2nd page */
33#define	BOOTARG_OFF	(NBPG*2)
34#define	BOOTARG_LEN	(NBPG*1)
35#define	BOOTBIOS_ADDR	(0x7c00)
36#define	BOOTBIOS_MAXSEC	((1 << 28) - 1)
37
38	/* physical page for ptp 0 need for various tramps */
39#define PTP0_PA		(NBPG*3)
40
41	/* BIOS configure flags */
42#define	BIOSF_BIOS32	0x0001
43#define	BIOSF_PCIBIOS	0x0002
44#define	BIOSF_PROMSCAN	0x0004
45#define	BIOSF_SMBIOS	0x0008
46
47/* BIOS media ID */
48#define BIOSM_F320K	0xff	/* floppy ds/sd  8 spt */
49#define	BIOSM_F160K	0xfe	/* floppy ss/sd  8 spt */
50#define	BIOSM_F360K	0xfd	/* floppy ds/sd  9 spt */
51#define	BIOSM_F180K	0xfc	/* floppy ss/sd  9 spt */
52#define	BIOSM_ROMD	0xfa	/* ROM disk */
53#define	BIOSM_F120M	0xf9	/* floppy ds/hd 15 spt 5.25" */
54#define	BIOSM_F720K	0xf9	/* floppy ds/dd  9 spt 3.50" */
55#define	BIOSM_HD	0xf8	/* hard drive */
56#define	BIOSM_F144K	0xf0	/* floppy ds/hd 18 spt 3.50" */
57#define	BIOSM_OTHER	0xf0	/* any other */
58
59/*
60 * BIOS memory maps
61 */
62#define	BIOS_MAP_END	0x00	/* End of array XXX - special */
63#define	BIOS_MAP_FREE	0x01	/* Usable memory */
64#define	BIOS_MAP_RES	0x02	/* Reserved memory */
65#define	BIOS_MAP_ACPI	0x03	/* ACPI Reclaim memory */
66#define	BIOS_MAP_NVS	0x04	/* ACPI NVS memory */
67
68/*
69 * Optional ROM header
70 */
71typedef
72struct bios_romheader {
73	u_int16_t	signature;	/* 0xaa55 */
74	u_int8_t	len;		/* length in pages (512 bytes) */
75	u_int32_t	entry;		/* initialization entry point */
76	u_int8_t	reserved[19];
77	u_int16_t	pnpheader;	/* offset to PnP expansion header */
78} __packed *bios_romheader_t;
79
80/*
81 * BIOS32
82 */
83typedef
84struct bios32_header {
85	u_int32_t	signature;	/* 00: signature "_32_" */
86	u_int32_t	entry;		/* 04: entry point */
87	u_int8_t	rev;		/* 08: revision */
88	u_int8_t	length;		/* 09: header length */
89	u_int8_t	cksum;		/* 0a: modulo 256 checksum */
90	u_int8_t	reserved[5];
91} __packed *bios32_header_t;
92
93typedef
94struct bios32_entry_info {
95	u_int32_t	bei_base;
96	u_int32_t	bei_size;
97	u_int32_t	bei_entry;
98} __packed *bios32_entry_info_t;
99
100typedef
101struct bios32_entry {
102	u_int32_t	offset;
103	u_int16_t	segment;
104} __packed *bios32_entry_t;
105
106#define	BIOS32_START	0xe0000
107#define	BIOS32_SIZE	0x20000
108#define	BIOS32_END	(BIOS32_START + BIOS32_SIZE - 0x10)
109
110#define	BIOS32_MAKESIG(a, b, c, d) \
111	((a) | ((b) << 8) | ((c) << 16) | ((d) << 24))
112#define	BIOS32_SIGNATURE	BIOS32_MAKESIG('_', '3', '2', '_')
113#define	PCIBIOS_SIGNATURE	BIOS32_MAKESIG('$', 'P', 'C', 'I')
114#define	SMBIOS_SIGNATURE	BIOS32_MAKESIG('_', 'S', 'M', '_')
115
116/*
117 * CTL_BIOS definitions.
118 */
119#define	BIOS_DEV		1	/* int: BIOS boot device */
120#define	BIOS_DISKINFO		2	/* struct: BIOS boot device info */
121#define BIOS_CKSUMLEN		3	/* int: disk cksum block count */
122#define	BIOS_MAXID		4	/* number of valid machdep ids */
123
124#define	CTL_BIOS_NAMES { \
125	{ 0, 0 }, \
126	{ "biosdev", CTLTYPE_INT }, \
127	{ "diskinfo", CTLTYPE_STRUCT }, \
128	{ "cksumlen", CTLTYPE_INT }, \
129}
130
131#define	BOOTARG_MEMMAP 0
132typedef struct _bios_memmap {
133	u_int64_t addr;		/* Beginning of block */
134	u_int64_t size;		/* Size of block */
135	u_int32_t type;		/* Type of block */
136} __packed bios_memmap_t;
137
138/* Info about disk from the bios, plus the mapping from
139 * BIOS numbers to BSD major (driver?) number.
140 *
141 * Also, do not bother with BIOSN*() macros, just parcel
142 * the info out, and use it like this.  This makes for less
143 * of a dependance on BIOSN*() macros having to be the same
144 * across /boot, /bsd, and userland.
145 */
146#define	BOOTARG_DISKINFO 1
147typedef struct _bios_diskinfo {
148	/* BIOS section */
149	int bios_number;	/* BIOS number of drive (or -1) */
150	u_int bios_cylinders;	/* BIOS cylinders */
151	u_int bios_heads;	/* BIOS heads */
152	u_int bios_sectors;	/* BIOS sectors */
153	int bios_edd;		/* EDD support */
154
155	/* BSD section */
156	dev_t bsd_dev;		/* BSD device */
157
158	/* Checksum section */
159	u_int32_t checksum;	/* Checksum for drive */
160
161	/* Misc. flags */
162	u_int32_t flags;
163#define BDI_INVALID	0x00000001	/* I/O error during checksumming */
164#define BDI_GOODLABEL	0x00000002	/* Had SCSI or ST506/ESDI disklabel */
165#define BDI_BADLABEL	0x00000004	/* Had another disklabel */
166#define BDI_EL_TORITO	0x00000008	/* 2,048-byte sectors */
167#define BDI_PICKED	0x80000000	/* kernel-only: cksum matched */
168
169} __packed bios_diskinfo_t;
170
171#define	BOOTARG_APMINFO 2
172typedef struct _bios_apminfo {
173	/* APM_CONNECT returned values */
174	u_int	apm_detail;
175	u_int	apm_code32_base;
176	u_int	apm_code16_base;
177	u_int	apm_code_len;
178	u_int	apm_data_base;
179	u_int	apm_data_len;
180	u_int	apm_entry;
181	u_int	apm_code16_len;
182} __packed bios_apminfo_t;
183
184#define	BOOTARG_CKSUMLEN 3		/* u_int32_t */
185
186#define	BOOTARG_PCIINFO 4
187typedef struct _bios_pciinfo {
188	/* PCI BIOS v2.0+ - Installation check values */
189	u_int32_t	pci_chars;	/* Characteristics (%eax) */
190	u_int32_t	pci_rev;	/* BCD Revision (%ebx) */
191	u_int32_t	pci_entry32;	/* PM entry point for PCI BIOS */
192	u_int32_t	pci_lastbus;	/* Number of last PCI bus */
193} __packed bios_pciinfo_t;
194
195#define	BOOTARG_CONSDEV	5
196typedef struct _bios_consdev {
197	dev_t	consdev;
198	int	conspeed;
199} __packed bios_consdev_t;
200
201#define BOOTARG_SMPINFO 6		/* struct mp_float[] */
202
203#define BOOTARG_BOOTMAC	7
204typedef struct _bios_bootmac {
205	char	mac[6];
206} __packed bios_bootmac_t;
207
208#define BOOTARG_DDB 8
209typedef struct _bios_ddb {
210	int	db_console;
211} __packed bios_ddb_t;
212
213#define BOOTARG_BOOTDUID 9
214typedef struct _bios_bootduid {
215	u_char	duid[8];
216} __packed bios_bootduid_t;
217
218#if defined(_KERNEL) || defined (_STANDALONE)
219
220#ifdef _LOCORE
221#define	DOINT(n)	int	$0x20+(n)
222#else
223#define	DOINT(n)	"int $0x20+(" #n ")"
224
225extern volatile struct BIOS_regs {
226	u_int32_t	biosr_ax;
227	u_int32_t	biosr_cx;
228	u_int32_t	biosr_dx;
229	u_int32_t	biosr_bx;
230	u_int32_t	biosr_bp;
231	u_int32_t	biosr_si;
232	u_int32_t	biosr_di;
233	u_int32_t	biosr_ds;
234	u_int32_t	biosr_es;
235} __packed BIOS_regs;
236
237#ifdef _KERNEL
238#include <machine/bus.h>
239
240struct bios_attach_args {
241	char		*ba_name;
242	u_int		ba_func;
243	bus_space_tag_t	ba_iot;
244	bus_space_tag_t	ba_memt;
245	union {
246		void		*_p;
247		bios_apminfo_t	*_ba_apmp;
248		paddr_t		_ba_acpipbase;
249	} _;
250};
251
252#define	ba_apmp		_._ba_apmp
253#define ba_acpipbase	_._ba_acpipbase
254
255struct consdev;
256struct proc;
257
258int bios_sysctl(int *, u_int, void *, size_t *, void *, size_t, struct proc *);
259
260void bios_getopt(void);
261
262/* bios32.c */
263int  bios32_service(u_int32_t, bios32_entry_t, bios32_entry_info_t);
264
265extern u_int bootapiver;
266extern bios_memmap_t *bios_memmap;
267extern void *bios_smpinfo;
268extern bios_pciinfo_t *bios_pciinfo;
269
270#endif /* _KERNEL */
271#endif /* _LOCORE */
272#endif /* _KERNEL || _STANDALONE */
273
274#endif /* _MACHINE_BIOSVAR_H_ */
275