6b15efd961
Use bd_getdev() to work out a dev_t for the root device. Allow $rootdev to override $currdev as the root device. biosdisk.c Save the slice table and disklabel when opening a disk. Add bd_getdev(), which attempts to return a dev_t corresponding to a given device. Cases which it still doesn't get right: - The inevitable da-when-wd-also-exists - Disks with no slice table (the slice number is not set correctly) The first is difficult to get right, the second will be fixed in an upcoming commit. comconsole.c vidconsole.c getchar() should return an 8-bit value; some BIOSsen pack extra information in %eax. libi386.h Remove some stale prototypes, add new ones.
95 lines
3.1 KiB
C
95 lines
3.1 KiB
C
/*-
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* Copyright (c) 1998 Michael Smith <msmith@freebsd.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $Id: libi386.h,v 1.6 1998/09/26 10:51:38 dfr Exp $
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*/
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/*
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* i386 fully-qualified device descriptor.
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* Note, this must match the 'struct devdesc' declaration
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* in bootstrap.h.
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*/
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struct i386_devdesc
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{
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struct devsw *d_dev;
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int d_type;
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union
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{
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struct
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{
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int unit;
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int slice;
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int partition;
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void *data;
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} biosdisk;
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struct
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{
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int unit; /* XXX net layer lives over these? */
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} netif;
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} d_kind;
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};
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extern int i386_getdev(void **vdev, const char *devspec, const char **path);
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extern char *i386_fmtdev(void *vdev);
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extern int i386_setcurrdev(struct env_var *ev, int flags, void *value);
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extern struct devdesc currdev; /* our current device */
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#define MAXDEV 31 /* maximum number of distinct devices */
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/* exported devices XXX rename? */
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extern struct devsw biosdisk;
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extern int bd_bios2unit(int biosdev); /* xlate BIOS device -> biosdisk unit */
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extern int bd_unit2bios(int unit); /* xlate biosdisk unit -> BIOS device */
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extern int bd_getdev(struct i386_devdesc *dev); /* return dev_t for (dev) */
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extern int i386_copyin(void *src, vm_offset_t dest, size_t len);
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extern int i386_copyout(vm_offset_t src, void *dest, size_t len);
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extern int i386_readin(int fd, vm_offset_t dest, size_t len);
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extern int getbasemem(void);
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extern int getextmem(void);
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extern vm_offset_t memtop;
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extern void gateA20(void);
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extern int i386_autoload(void);
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extern int bi_getboothowto(char *kargs);
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extern vm_offset_t bi_copyenv(vm_offset_t addr);
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/*
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* BIOS functions from bioscalls.c
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*/
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extern int BIOS_cominit(int port);
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extern int BIOS_computc(int c, int port);
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extern int BIOS_comgetc(int port);
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extern int BIOS_comisc(int port);
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extern int BIOS_diskinfo_old(int drive, int *param);
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