Home | History | Annotate | Line # | Download | only in mipsco 
      1 /*	$NetBSD: autoconf.c,v 1.28 2017/06/22 16:46:53 flxd Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 1988 University of Utah.
      5  * Copyright (c) 1992, 1993
      6  *	The Regents of the University of California.  All rights reserved.
      7  *
      8  * This code is derived from software contributed to Berkeley by
      9  * the Systems Programming Group of the University of Utah Computer
     10  * Science Department and Ralph Campbell.
     11  *
     12  * Redistribution and use in source and binary forms, with or without
     13  * modification, are permitted provided that the following conditions
     14  * are met:
     15  * 1. Redistributions of source code must retain the above copyright
     16  *    notice, this list of conditions and the following disclaimer.
     17  * 2. Redistributions in binary form must reproduce the above copyright
     18  *    notice, this list of conditions and the following disclaimer in the
     19  *    documentation and/or other materials provided with the distribution.
     20  * 3. Neither the name of the University nor the names of its contributors
     21  *    may be used to endorse or promote products derived from this software
     22  *    without specific prior written permission.
     23  *
     24  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     25  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     26  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     27  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     28  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     29  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     30  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     31  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     32  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     33  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     34  * SUCH DAMAGE.
     35  *
     36  * from: Utah Hdr: autoconf.c 1.31 91/01/21
     37  *
     38  *	@(#)autoconf.c	8.1 (Berkeley) 6/10/93
     39  */
     40 
     41 /*
     42  * Setup the system to run on the current machine.
     43  *
     44  * Configure() is called at boot time.  Available
     45  * devices are determined (from possibilities mentioned in ioconf.c),
     46  * and the drivers are initialized.
     47  */
     48 
     49 #define __INTR_PRIVATE
     50 #include <sys/cdefs.h>
     51 __KERNEL_RCSID(0, "$NetBSD: autoconf.c,v 1.28 2017/06/22 16:46:53 flxd Exp $");
     52 
     53 #include <sys/param.h>
     54 #include <sys/systm.h>
     55 #include <sys/buf.h>
     56 #include <sys/conf.h>
     57 #include <sys/reboot.h>
     58 #include <sys/device.h>
     59 
     60 #include <dev/scsipi/scsi_all.h>
     61 #include <dev/scsipi/scsipi_all.h>
     62 #include <dev/scsipi/scsiconf.h>
     63 
     64 #include <machine/cpu.h>
     65 #include <machine/mainboard.h>
     66 #include <machine/autoconf.h>
     67 
     68 /*
     69  * The following several variables are related to
     70  * the configuration process, and are used in initializing
     71  * the machine.
     72  */
     73 int	cpuspeed = 25;	/* approx # instr per usec. */
     74 
     75 extern int initcpu(void);		/*XXX*/
     76 
     77 void	findroot(device_t *, int *);
     78 
     79 struct mipsco_intrhand intrtab[MAX_INTR_COOKIES];
     80 
     81 /*
     82  * Determine mass storage and memory configuration for a machine.
     83  * Print CPU type, and then iterate over an array of devices
     84  * found on the baseboard or in TURBOchannel option slots.
     85  * Once devices are configured, enable interrupts, and probe
     86  * for attached scsi devices.
     87  */
     88 void
     89 cpu_configure(void)
     90 {
     91 
     92 	/*
     93 	 * Kick off autoconfiguration
     94 	 */
     95 	(void) splhigh();
     96 	if (config_rootfound("mainbus", NULL) == NULL)
     97 		panic("no mainbus found");
     98 	initcpu();
     99 }
    100 
    101 void
    102 cpu_rootconf(void)
    103 {
    104 	findroot(&booted_device, &booted_partition);
    105 
    106 	printf("boot device: %s\n",
    107 	       booted_device ? device_xname(booted_device) : "<unknown>");
    108 	rootconf();
    109 }
    110 
    111 dev_t	bootdev = 0;
    112 char	boot_class;
    113 int	boot_id, boot_lun, boot_part;
    114 
    115 /*
    116  * Attempt to find the device from which we were booted.
    117  */
    118 void
    119 findroot(device_t *devpp, int *partp)
    120 {
    121 	device_t dv;
    122 	deviter_t di;
    123 
    124 	for (dv = deviter_first(&di, DEVITER_F_ROOT_FIRST);
    125 	     dv != NULL;
    126 	     dv = deviter_next(&di)) {
    127 		if (device_class(dv) == boot_class &&
    128 		    /* XXX device_unit() abuse */
    129 		    device_unit(dv) == boot_id)
    130 		    	break;
    131 	}
    132 	deviter_release(&di);
    133 	if (dv != NULL) {
    134 		*devpp = dv;
    135 		*partp = boot_part;
    136 		return;
    137 	}
    138 
    139 	/*
    140 	 * Default to "not found".
    141 	 */
    142 	*devpp = NULL;
    143 	*partp = 0;
    144 	return;
    145 }
    146 
    147 void
    148 makebootdev(char *cp)
    149 {
    150 	boot_class = -1;
    151 	boot_id = boot_lun = boot_part = 0;
    152 
    153 	if (strlen(cp) < 6)
    154 		return;
    155 	if (strncmp(cp, "dk", 2) == 0 && cp[4] == '(') { /* Disk */
    156 		cp += 5;
    157 		if (*cp >= '0' && *cp <= '9')
    158 			boot_lun = *cp++ - '0';
    159 		if (*cp == ',')
    160 			cp += 1;
    161 		if (*cp >= '0' && *cp <= '9')
    162 			boot_id = *cp++ - '0';
    163 		if (*cp == ',')
    164 			cp += 1;
    165 		if (*cp >= '0' && *cp <= '7')
    166 			boot_part = *cp - '0';
    167 		boot_class = DV_DISK;
    168 		return;
    169 	}
    170 }
    171