biosvar.h revision 1.26 
1/*	$OpenBSD: biosvar.h,v 1.26 2019/08/04 14:28:58 kettenis 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 * 3. The name of the author may not be used to endorse or promote products
16 *    derived from this software without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
21 * IN NO EVENT SHALL THE AUTHOR OR HIS RELATIVES BE LIABLE FOR ANY DIRECT,
22 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
23 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
24 * SERVICES; LOSS OF MIND, USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
26 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
27 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
28 * THE POSSIBILITY OF SUCH DAMAGE.
29 */
30
31#ifndef _MACHINE_BIOSVAR_H_
32#define _MACHINE_BIOSVAR_H_
33
34	/* some boxes put apm data seg in the 2nd page */
35#define	BOOTARG_OFF	(PAGE_SIZE * 2)
36#define	BOOTARG_LEN	(PAGE_SIZE * 1)
37#define	BOOTBIOS_ADDR	(0x7c00)
38#define	BOOTBIOS_MAXSEC	((1 << 28) - 1)
39
40	/* BIOS configure flags */
41#define	BIOSF_BIOS32	0x0001
42#define	BIOSF_PCIBIOS	0x0002
43#define	BIOSF_PROMSCAN	0x0004
44#define	BIOSF_SMBIOS	0x0006
45
46/* BIOS media ID */
47#define BIOSM_F320K	0xff	/* floppy ds/sd  8 spt */
48#define	BIOSM_F160K	0xfe	/* floppy ss/sd  8 spt */
49#define	BIOSM_F360K	0xfd	/* floppy ds/sd  9 spt */
50#define	BIOSM_F180K	0xfc	/* floppy ss/sd  9 spt */
51#define	BIOSM_ROMD	0xfa	/* ROM disk */
52#define	BIOSM_F120M	0xf9	/* floppy ds/hd 15 spt 5.25" */
53#define	BIOSM_F720K	0xf9	/* floppy ds/dd  9 spt 3.50" */
54#define	BIOSM_HD	0xf8	/* hard drive */
55#define	BIOSM_F144K	0xf0	/* floppy ds/hd 18 spt 3.50" */
56#define	BIOSM_OTHER	0xf0	/* any other */
57
58/*
59 * BIOS memory maps
60 */
61#define	BIOS_MAP_END	0x00	/* End of array XXX - special */
62#define	BIOS_MAP_FREE	0x01	/* Usable memory */
63#define	BIOS_MAP_RES	0x02	/* Reserved memory */
64#define	BIOS_MAP_ACPI	0x03	/* ACPI Reclaim memory */
65#define	BIOS_MAP_NVS	0x04	/* ACPI NVS memory */
66
67/*
68 * Optional ROM header
69 */
70typedef
71struct bios_romheader {
72	uint16_t	signature;	/* 0xaa55 */
73	uint8_t		len;		/* length in pages (512 bytes) */
74	uint32_t	entry;		/* initialization entry point */
75	uint8_t		reserved[19];
76	uint16_t	pnpheader;	/* offset to PnP expansion header */
77} __packed *bios_romheader_t;
78
79#define	BIOS32_MAKESIG(a, b, c, d) \
80	((a) | ((b) << 8) | ((c) << 16) | ((d) << 24))
81#define	SMBIOS_SIGNATURE	BIOS32_MAKESIG('_', 'S', 'M', '_')
82
83/*
84 * CTL_BIOS definitions.
85 */
86#define	BIOS_DEV		1	/* int: BIOS boot device */
87#define	BIOS_DISKINFO		2	/* struct: BIOS boot device info */
88#define BIOS_CKSUMLEN		3	/* int: disk cksum block count */
89#define	BIOS_MAXID		4	/* number of valid machdep ids */
90
91#define	CTL_BIOS_NAMES { \
92	{ 0, 0 }, \
93	{ "biosdev", CTLTYPE_INT }, \
94	{ "diskinfo", CTLTYPE_STRUCT }, \
95	{ "cksumlen", CTLTYPE_INT }, \
96}
97
98#define	BOOTARG_MEMMAP 0
99typedef struct _bios_memmap {
100	uint64_t addr;		/* Beginning of block */
101	uint64_t size;		/* Size of block */
102	uint32_t type;		/* Type of block */
103} __packed bios_memmap_t;
104
105/* Info about disk from the bios, plus the mapping from
106 * BIOS numbers to BSD major (driver?) number.
107 *
108 * Also, do not bother with BIOSN*() macros, just parcel
109 * the info out, and use it like this.  This makes for less
110 * of a dependence on BIOSN*() macros having to be the same
111 * across /boot, /bsd, and userland.
112 */
113#define	BOOTARG_DISKINFO 1
114typedef struct _bios_diskinfo {
115	/* BIOS section */
116	int bios_number;	/* BIOS number of drive (or -1) */
117	u_int bios_cylinders;	/* BIOS cylinders */
118	u_int bios_heads;	/* BIOS heads */
119	u_int bios_sectors;	/* BIOS sectors */
120	int bios_edd;		/* EDD support */
121
122	/* BSD section */
123	dev_t bsd_dev;		/* BSD device */
124
125	/* Checksum section */
126	uint32_t checksum;	/* Checksum for drive */
127
128	/* Misc. flags */
129	uint32_t flags;
130#define BDI_INVALID	0x00000001	/* I/O error during checksumming */
131#define BDI_GOODLABEL	0x00000002	/* Had SCSI or ST506/ESDI disklabel */
132#define BDI_BADLABEL	0x00000004	/* Had another disklabel */
133#define BDI_EL_TORITO	0x00000008	/* 2,048-byte sectors */
134#define BDI_HIBVALID	0x00000010	/* hibernate signature valid */
135#define BDI_PICKED	0x80000000	/* kernel-only: cksum matched */
136
137} __packed bios_diskinfo_t;
138
139#define	BOOTARG_APMINFO 2
140typedef struct _bios_apminfo {
141	/* APM_CONNECT returned values */
142	u_int	apm_detail;
143	u_int	apm_code32_base;
144	u_int	apm_code16_base;
145	u_int	apm_code_len;
146	u_int	apm_data_base;
147	u_int	apm_data_len;
148	u_int	apm_entry;
149	u_int	apm_code16_len;
150} __packed bios_apminfo_t;
151
152#define	BOOTARG_CKSUMLEN 3		/* uint32_t */
153
154#define	BOOTARG_PCIINFO 4
155typedef struct _bios_pciinfo {
156	/* PCI BIOS v2.0+ - Installation check values */
157	uint32_t	pci_chars;	/* Characteristics (%eax) */
158	uint32_t	pci_rev;	/* BCD Revision (%ebx) */
159	uint32_t	pci_entry32;	/* PM entry point for PCI BIOS */
160	uint32_t	pci_lastbus;	/* Number of last PCI bus */
161} __packed bios_pciinfo_t;
162
163#define	BOOTARG_CONSDEV	5
164typedef struct _bios_consdev {
165	dev_t	consdev;
166	int	conspeed;
167	int	consaddr;
168	int	consfreq;
169} __packed bios_consdev_t;
170
171#define BOOTARG_BOOTMAC	7
172typedef struct _bios_bootmac {
173	char	mac[6];
174} __packed bios_bootmac_t;
175
176#define BOOTARG_DDB 8
177typedef struct _bios_ddb {
178	int	db_console;
179} __packed bios_ddb_t;
180
181#define BOOTARG_BOOTDUID 9
182typedef struct _bios_bootduid {
183	u_char	duid[8];
184} __packed bios_bootduid_t;
185
186#define BOOTARG_BOOTSR 10
187#define BOOTSR_UUID_MAX 16
188#define BOOTSR_CRYPTO_MAXKEYBYTES 32
189typedef struct _bios_bootsr {
190	uint8_t		uuid[BOOTSR_UUID_MAX];
191	uint8_t		maskkey[BOOTSR_CRYPTO_MAXKEYBYTES];
192} __packed bios_bootsr_t;
193
194#define	BOOTARG_EFIINFO 11
195typedef struct _bios_efiinfo {
196	uint64_t	config_acpi;
197	uint64_t	config_smbios;
198	uint64_t	fb_addr;
199	uint64_t	fb_size;
200	uint32_t	fb_height;
201	uint32_t	fb_width;
202	uint32_t	fb_pixpsl;	/* pixels per scan line */
203	uint32_t	fb_red_mask;
204	uint32_t	fb_green_mask;
205	uint32_t	fb_blue_mask;
206	uint32_t	fb_reserved_mask;
207} __packed bios_efiinfo_t;
208
209#define	BOOTARG_UCODE 12
210typedef struct _bios_ucode {
211	uint64_t	uc_addr;
212	uint64_t	uc_size;
213} __packed bios_ucode_t;
214
215#if defined(_KERNEL) || defined (_STANDALONE)
216
217#ifdef _LOCORE
218#define	DOINT(n)	int	$0x20+(n)
219#else
220#define	DOINT(n)	"int $0x20+(" #n ")"
221
222extern volatile struct BIOS_regs {
223	uint32_t	biosr_ax;
224	uint32_t	biosr_cx;
225	uint32_t	biosr_dx;
226	uint32_t	biosr_bx;
227	uint32_t	biosr_bp;
228	uint32_t	biosr_si;
229	uint32_t	biosr_di;
230	uint32_t	biosr_ds;
231	uint32_t	biosr_es;
232} __packed BIOS_regs;
233
234#ifdef _KERNEL
235#include <machine/bus.h>
236
237struct bios_attach_args {
238	char		*ba_name;
239	u_int		ba_func;
240	bus_space_tag_t	ba_iot;
241	bus_space_tag_t	ba_memt;
242	union {
243		void		*_p;
244		bios_apminfo_t	*_ba_apmp;
245		paddr_t		_ba_acpipbase;
246	} _;
247};
248
249#define	ba_apmp		_._ba_apmp
250#define ba_acpipbase	_._ba_acpipbase
251
252struct consdev;
253struct proc;
254
255int bios_sysctl(int *, u_int, void *, size_t *, void *, size_t, struct proc *);
256
257void bios_getopt(void);
258bios_diskinfo_t *bios_getdiskinfo(dev_t);
259
260extern u_int bootapiver;
261extern bios_memmap_t *bios_memmap;
262extern bios_efiinfo_t *bios_efiinfo;
263extern bios_ucode_t *bios_ucode;
264
265#endif /* _KERNEL */
266#endif /* _LOCORE */
267#endif /* _KERNEL || _STANDALONE */
268
269#endif /* _MACHINE_BIOSVAR_H_ */
270