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/*-
* Copyright (c) 1990 The Regents of the University of California.
* All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* William Jolitz.
*
* 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``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 REGENTS OR CONTRIBUTORS 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 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.
*
* @(#)autoconf.c 7.1 (Berkeley) 5/9/91
*
* PATCHES MAGIC LEVEL PATCH THAT GOT US HERE
* -------------------- ----- ----------------------
* CURRENT PATCH LEVEL: 1 00117
* -------------------- ----- ----------------------
*
* 09 Apr 93 ???(From sun-lamp) Fix to report sd when Julians
* scsi code is used, allow you to swap
* root floppies during a boot
*/
static char rcsid[] = "$Header: /b/source/CVS/src/sys.386bsd/i386/i386/autoconf.c,v 1.3 1993/04/10 21:58:52 cgd Exp $";
/*
* Setup the system to run on the current machine.
*
* Configure() is called at boot time and initializes the vba
* device tables and the memory controller monitoring. Available
* devices are determined (from possibilities mentioned in ioconf.c),
* and the drivers are initialized.
*/
#include "param.h"
#include "systm.h"
#include "buf.h"
#include "dkstat.h"
#include "conf.h"
#include "dmap.h"
#include "reboot.h"
#include "machine/pte.h"
/*
* The following several variables are related to
* the configuration process, and are used in initializing
* the machine.
*/
int dkn; /* number of iostat dk numbers assigned so far */
extern int cold; /* cold start flag initialized in locore.s */
/*
* Determine i/o configuration for a machine.
*/
configure()
{
#include "isa.h"
#if NISA > 0
isa_configure();
#endif
#if GENERICxxx
if ((boothowto & RB_ASKNAME) == 0)
setroot();
setconf();
#else
setroot();
#endif
/*
* Configure swap area and related system
* parameter based on device(s) used.
*/
swapconf();
cold = 0;
}
/*
* Configure swap space and related parameters.
*/
swapconf()
{
register struct swdevt *swp;
register int nblks;
extern int Maxmem;
for (swp = swdevt; swp->sw_dev > 0; swp++)
{
unsigned d = major(swp->sw_dev);
if (d > nblkdev) break;
if (bdevsw[d].d_psize) {
nblks = (*bdevsw[d].d_psize)(swp->sw_dev);
if (nblks > 0 &&
(swp->sw_nblks == 0 || swp->sw_nblks > nblks))
swp->sw_nblks = nblks;
else
swp->sw_nblks = 0;
}
swp->sw_nblks = ctod(dtoc(swp->sw_nblks));
}
if (dumplo == 0 && bdevsw[major(dumpdev)].d_psize)
/*dumplo = (*bdevsw[major(dumpdev)].d_psize)(dumpdev) - physmem;*/
dumplo = (*bdevsw[major(dumpdev)].d_psize)(dumpdev) -
Maxmem*NBPG/512;
if (dumplo < 0)
dumplo = 0;
}
#define DOSWAP /* change swdevt and dumpdev */
u_long bootdev = 0; /* should be dev_t, but not until 32 bits */
#include "sd.h"
static char devname[][2] = {
'w','d', /* 0 = wd */
's','w', /* 1 = sw */
'f','d', /* 2 = fd */
'w','t', /* 3 = wt */
#if NSD < 1
'a','s', /* 4 = as */
#else
's','d', /* 4 = sd -- new SCSI system */
#endif
};
#define PARTITIONMASK 0x7
#define PARTITIONSHIFT 3
/*
* Attempt to find the device from which we were booted.
* If we can do so, and not instructed not to do so,
* change rootdev to correspond to the load device.
*/
setroot()
{
int majdev, mindev, unit, part, adaptor;
dev_t temp, orootdev;
struct swdevt *swp;
/*printf("howto %x bootdev %x ", boothowto, bootdev);*/
if (boothowto & RB_DFLTROOT ||
(bootdev & B_MAGICMASK) != (u_long)B_DEVMAGIC)
return;
majdev = (bootdev >> B_TYPESHIFT) & B_TYPEMASK;
if (majdev > sizeof(devname) / sizeof(devname[0]))
return;
adaptor = (bootdev >> B_ADAPTORSHIFT) & B_ADAPTORMASK;
part = (bootdev >> B_PARTITIONSHIFT) & B_PARTITIONMASK;
unit = (bootdev >> B_UNITSHIFT) & B_UNITMASK;
mindev = (unit << PARTITIONSHIFT) + part;
orootdev = rootdev;
rootdev = makedev(majdev, mindev);
/*
* If the original rootdev is the same as the one
* just calculated, don't need to adjust the swap configuration.
*/
if (rootdev == orootdev)
return;
if (devname[majdev][0] == 'f' && devname[majdev][1] == 'd') {
printf("");
printf("* insert the floppy you want to have mounted as\n");
printf("* root, and hit any key to continue booting:\n");
cngetc();
printf("");
}
printf("changing root device to %c%c%d%c\n",
devname[majdev][0], devname[majdev][1],
mindev >> PARTITIONSHIFT, part + 'a');
#ifdef DOSWAP
mindev &= ~PARTITIONMASK;
for (swp = swdevt; swp->sw_dev; swp++) {
if (majdev == major(swp->sw_dev) &&
mindev == (minor(swp->sw_dev) & ~PARTITIONMASK)) {
temp = swdevt[0].sw_dev;
swdevt[0].sw_dev = swp->sw_dev;
swp->sw_dev = temp;
break;
}
}
if (swp->sw_dev == 0)
return;
/*
* If dumpdev was the same as the old primary swap
* device, move it to the new primary swap device.
*/
if (temp == dumpdev)
dumpdev = swdevt[0].sw_dev;
#endif
}
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