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/* $OpenBSD: biosvar.h,v 1.41 2003/06/03 20:10:32 mickey Exp $ */
/*
* Copyright (c) 1997-1999 Michael Shalayeff
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR OR HIS RELATIVES BE LIABLE FOR ANY DIRECT,
* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF MIND, USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef _I386_BIOSVAR_H_
#define _I386_BIOSVAR_H_
#pragma pack(1)
/* some boxes put apm data seg in the 2nd page */
#define BOOTARG_OFF (NBPG*2)
#define BOOTARG_LEN (NBPG*1)
#define BOOTBIOS_ADDR (0x7c00)
/* BIOS configure flags */
#define BIOSF_BIOS32 0x0001
#define BIOSF_PCIBIOS 0x0002
#define BIOSF_PROMSCAN 0x0004
/* BIOS media ID */
#define BIOSM_F320K 0xff /* floppy ds/sd 8 spt */
#define BIOSM_F160K 0xfe /* floppy ss/sd 8 spt */
#define BIOSM_F360K 0xfd /* floppy ds/sd 9 spt */
#define BIOSM_F180K 0xfc /* floppy ss/sd 9 spt */
#define BIOSM_ROMD 0xfa /* ROM disk */
#define BIOSM_F120M 0xf9 /* floppy ds/hd 15 spt 5.25" */
#define BIOSM_F720K 0xf9 /* floppy ds/dd 9 spt 3.50" */
#define BIOSM_HD 0xf8 /* hard drive */
#define BIOSM_F144K 0xf0 /* floppy ds/hd 18 spt 3.50" */
#define BIOSM_OTHER 0xf0 /* any other */
/*
* BIOS memory maps
*/
#define BIOS_MAP_END 0x00 /* End of array XXX - special */
#define BIOS_MAP_FREE 0x01 /* Usable memory */
#define BIOS_MAP_RES 0x02 /* Reserved memory */
#define BIOS_MAP_ACPI 0x03 /* ACPI Reclaim memory */
#define BIOS_MAP_NVS 0x04 /* ACPI NVS memory */
/*
* Optional ROM header
*/
typedef
struct bios_romheader {
u_int16_t signature; /* 0xaa55 */
u_int8_t len; /* length in pages (512 bytes) */
u_int32_t entry; /* initialization entry point */
u_int8_t reserved[19];
u_int16_t pnpheader; /* offset to PnP expansion header */
} *bios_romheader_t;
/*
* BIOS32
*/
typedef
struct bios32_header {
u_int32_t signature; /* 00: signature "_32_" */
u_int32_t entry; /* 04: entry point */
u_int8_t rev; /* 08: revision */
u_int8_t length; /* 09: header length */
u_int8_t cksum; /* 0a: modulo 256 checksum */
u_int8_t reserved[5];
} *bios32_header_t;
typedef
struct bios32_entry_info {
paddr_t bei_base;
psize_t bei_size;
paddr_t bei_entry;
} *bios32_entry_info_t;
typedef
struct bios32_entry {
u_int32_t offset;
u_int16_t segment;
} *bios32_entry_t;
#define BIOS32_START 0xe0000
#define BIOS32_SIZE 0x20000
#define BIOS32_END (BIOS32_START + BIOS32_SIZE - 0x10)
#define BIOS32_MAKESIG(a, b, c, d) \
((a) | ((b) << 8) | ((c) << 16) | ((d) << 24))
#define BIOS32_SIGNATURE BIOS32_MAKESIG('_', '3', '2', '_')
#define PCIBIOS_SIGNATURE BIOS32_MAKESIG('$', 'P', 'C', 'I')
/*
* CTL_BIOS definitions.
*/
#define BIOS_DEV 1 /* int: BIOS boot device */
#define BIOS_DISKINFO 2 /* struct: BIOS boot device info */
#define BIOS_CKSUMLEN 3 /* int: disk cksum block count */
#define BIOS_MAXID 4 /* number of valid machdep ids */
#define CTL_BIOS_NAMES { \
{ 0, 0 }, \
{ "biosdev", CTLTYPE_INT }, \
{ "diskinfo", CTLTYPE_STRUCT }, \
{ "cksumlen", CTLTYPE_INT }, \
}
#define BOOTARG_MEMMAP 0
typedef struct _bios_memmap {
u_int64_t addr; /* Beginning of block */
u_int64_t size; /* Size of block */
u_int32_t type; /* Type of block */
} bios_memmap_t;
/* Info about disk from the bios, plus the mapping from
* BIOS numbers to BSD major (driver?) number.
*
* Also, do not bother with BIOSN*() macros, just parcel
* the info out, and use it like this. This makes for less
* of a dependance on BIOSN*() macros having to be the same
* across /boot, /bsd, and userland.
*/
#define BOOTARG_DISKINFO 1
typedef struct _bios_diskinfo {
/* BIOS section */
int bios_number; /* BIOS number of drive (or -1) */
u_int bios_cylinders; /* BIOS cylinders */
u_int bios_heads; /* BIOS heads */
u_int bios_sectors; /* BIOS sectors */
int bios_edd; /* EDD support */
/* BSD section */
dev_t bsd_dev; /* BSD device */
/* Checksum section */
u_int32_t checksum; /* Checksum for drive */
/* Misc. flags */
u_int32_t flags;
#define BDI_INVALID 0x00000001 /* I/O error during checksumming */
#define BDI_GOODLABEL 0x00000002 /* Had SCSI or ST506/ESDI disklabel */
#define BDI_BADLABEL 0x00000004 /* Had another disklabel */
#define BDI_PICKED 0x80000000 /* kernel-only: cksum matched */
} bios_diskinfo_t;
#define BOOTARG_APMINFO 2
typedef struct _bios_apminfo {
/* APM_CONNECT returned values */
u_int apm_detail;
u_int apm_code32_base;
u_int apm_code16_base;
u_int apm_code_len;
u_int apm_data_base;
u_int apm_data_len;
u_int apm_entry;
u_int apm_code16_len;
} bios_apminfo_t;
#define BOOTARG_CKSUMLEN 3 /* u_int32_t */
#define BOOTARG_PCIINFO 4
typedef struct _bios_pciinfo {
/* PCI BIOS v2.0+ - Installation check values */
u_int32_t pci_chars; /* Characteristics (%eax) */
u_int32_t pci_rev; /* BCD Revision (%ebx) */
u_int32_t pci_entry32; /* PM entry point for PCI BIOS */
u_int32_t pci_lastbus; /* Number of last PCI bus */
} bios_pciinfo_t;
#define BOOTARG_CONSDEV 5
typedef struct _bios_consdev {
dev_t consdev;
int conspeed;
} bios_consdev_t;
#if defined(_KERNEL) || defined (_STANDALONE)
#ifdef _LOCORE
#define DOINT(n) int $0x20+(n)
#else
#define DOINT(n) "int $0x20+(" #n ")"
extern struct BIOS_regs {
u_int32_t biosr_ax;
u_int32_t biosr_cx;
u_int32_t biosr_dx;
u_int32_t biosr_bx;
u_int32_t biosr_bp;
u_int32_t biosr_si;
u_int32_t biosr_di;
u_int32_t biosr_ds;
u_int32_t biosr_es;
} BIOS_regs;
#ifdef _KERNEL
#include <machine/bus.h>
struct bios_attach_args {
char *bios_dev;
u_int bios_func;
bus_space_tag_t bios_iot;
bus_space_tag_t bios_memt;
union {
void *_p;
bios_apminfo_t *_bios_apmp;
} _;
};
#define bios_apmp _._bios_apmp
struct consdev;
struct proc;
int bios_sysctl(int *, u_int, void *, size_t *, void *, size_t, struct proc *);
void bioscnprobe(struct consdev *);
void bioscninit(struct consdev *);
void bioscnputc(dev_t, int);
int bioscngetc(dev_t);
void bioscnpollc(dev_t, int);
void bios_getopt(void);
/* bios32.c */
int bios32_service(u_int32_t, bios32_entry_t, bios32_entry_info_t);
extern u_int bootapiver;
extern bios_memmap_t *bios_memmap;
#endif /* _KERNEL */
#endif /* _LOCORE */
#endif /* _KERNEL || _STANDALONE */
#pragma pack()
#endif /* _I386_BIOSVAR_H_ */
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