/*- * Copyright (c) 1990, 1993 * 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 8.1 (Berkeley) 6/11/93 */ /* * 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 <sys/param.h> #include <sys/systm.h> #include <sys/map.h> #include <sys/buf.h> #include <sys/dkstat.h> #include <sys/conf.h> #include <sys/dmap.h> #include <sys/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 != NODEV; swp++) { if ( (u_int)swp->sw_dev >= nblkdev ) break; /* XXX */ if (bdevsw[major(swp->sw_dev)].d_psize) { nblks = (*bdevsw[major(swp->sw_dev)].d_psize)(swp->sw_dev); if (nblks != -1 && (swp->sw_nblks == 0 || swp->sw_nblks > nblks)) swp->sw_nblks = 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 */ static char devname[][2] = { 'w','d', /* 0 = wd */ 's','w', /* 1 = sw */ 'f','d', /* 2 = fd */ 'w','t', /* 3 = wt */ 'x','d', /* 4 = xd */ }; #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; 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; 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 != NODEV; 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 == NODEV) 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 }