/*- * 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 * * $Id: autoconf.c,v 1.8 1994/07/01 04:25:48 phil 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 #include #include #include #include #include /* #include */ #ifdef CONFIG_NEW #include #else #include #endif /* * 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() { /* Start the clocks. */ startrtclock(); /* Find out what the hardware configuration looks like! */ #ifdef CONFIG_NEW if (config_rootfound("membus","membus") == 0) panic ("No mem bus found!"); #else pc532_configure(); #endif /* select the root device */ setroot(); /* * 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 0 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) #endif 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] = { 's','d', /* 0 = sd */ 's','w', /* 1 = sw */ 's','t', /* 2 = st */ 'r','d', /* 3 = rd */ }; #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. */ extern int _boot_flags; /* 0 => no flags */ setroot() { #if 1 int majdev, mindev; char ans; dev_t temp; if (_boot_flags & 0x2) { boothowto |= RB_SINGLE; } if (_boot_flags & 0x1) { printf ("root dev (0=>/dev/rd, 1=>/dev/sd0a, 2=>/dev/sd1a) ?"); ans = cngetc(); printf ("%c\n", ans); if (ans < '0' || ans > '2') { printf ("bad root dev, using config root dev \n"); return; } if (ans == '0') { rootdev = makedev(2,0); } else if (ans == '1') { rootdev = makedev(0,0); } else { rootdev = makedev(0,8); } } #else 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; 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 #endif } #ifndef CONFIG_NEW pc532_configure() { struct pc532_device *dvp; struct pc532_driver *dp; int num; splhigh(); /* Just to make sure. */ num = 0; for (dvp = pc532_devtab_tty; config_dev(dvp,&num); dvp++); if (num) printf ("\n"); num = 0; for (dvp = pc532_devtab_bio; config_dev(dvp,&num); dvp++); if (num) printf ("\n"); num = 0; for (dvp = pc532_devtab_net; config_dev(dvp,&num); dvp++); if (num) printf ("\n"); } /* * Configure a pc532 device. */ config_dev(struct pc532_device *dp, int *num) { struct pc532_driver *driv; if (driv = dp->pd_driver) { dp->pd_alive = (*driv->probe)(dp); if (dp->pd_alive) (*driv->attach)(dp); return (1); } else return(0); } #else /* mem bus stuff? */ int membusprobe(); void membusattach(); struct cfdriver membuscd = { NULL, "membus", membusprobe, membusattach, DV_DULL, sizeof(struct device), NULL, 0 }; static int membusprint(aux, name) void *aux; char *name; { if (name) printf("%s at %s", *(char **)aux, name); return(UNCONF); } membusprobe(parent, cf, aux) struct device *parent; struct cfdata *cf; void *aux; { return (strcmp(cf->cf_driver->cd_name, "membus") == 0); } static char *name_list[] = {"scn", "scn", "scn", "scn", "scn", "scn", "scn", "scn", "ncr", /* "dp", "aic", */ NULL }; void membusattach(parent, dev, aux) struct device *parent, *dev; void *aux; { char **name; int fail=0; printf ("\n"); for (name=name_list ; name ; name++) { if (!config_found(dev, name, membusprint)) { fail++; } } if (fail) { printf("Failed to find %d required devices.\n", fail); panic("Can't continue."); } } #endif