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      1 /*	$NetBSD: autoconf.c,v 1.25 2025/11/29 23:12:26 tsutsui 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 /*
     50  * autoconf.c for news68k - from newsmips
     51  */
     52 
     53 #include <sys/cdefs.h>
     54 __KERNEL_RCSID(0, "$NetBSD: autoconf.c,v 1.25 2025/11/29 23:12:26 tsutsui Exp $");
     55 
     56 #include "scsibus.h"
     57 
     58 #include <sys/param.h>
     59 #include <sys/systm.h>
     60 #include <sys/conf.h>
     61 #include <sys/reboot.h>
     62 #include <sys/device.h>
     63 
     64 #include <dev/scsipi/scsipi_all.h>
     65 #include <dev/scsipi/scsiconf.h>
     66 
     67 #include <machine/cpu.h>
     68 #include <machine/romcall.h>
     69 #include <machine/autoconf.h>
     70 
     71 #include <news68k/news68k/isr.h>
     72 
     73 /*
     74  * The following several variables are related to
     75  * the configuration process, and are used in initializing
     76  * the machine.
     77  */
     78 
     79 static void findroot(void);
     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 	 * Kick off autoconfiguration
     93 	 */
     94 	(void) splhigh();
     95 
     96 	if (config_rootfound("mainbus", NULL) == NULL)
     97 		panic("autoconfig failed, no root");
     98 
     99 	/* Turn on interrupts */
    100 	(void) spl0();
    101 }
    102 
    103 void
    104 cpu_rootconf(void)
    105 {
    106 
    107 	findroot();
    108 
    109 	printf("boot device: %s\n",
    110 	       booted_device ? device_xname(booted_device) : "<unknown>");
    111 
    112 	rootconf();
    113 }
    114 
    115 u_long	bootdev = 0;		/* should be dev_t, but not until 32 bits */
    116 
    117 /*
    118  * Attempt to find the device from which we were booted.
    119  */
    120 void
    121 findroot(void)
    122 {
    123 #if NSCSIBUS > 0
    124 	int ctlr, part, type;
    125 	device_t dv;
    126 
    127 	if (BOOTDEV_MAG(bootdev) != 5)	/* NEWS-OS's B_DEVMAGIC */
    128 		return;
    129 
    130 	ctlr = BOOTDEV_CTLR(bootdev);	/* SCSI ID */
    131 	part = BOOTDEV_PART(bootdev);	/* LUN */
    132 	type = BOOTDEV_TYPE(bootdev);
    133 
    134 	if (type != BOOTDEV_SD)
    135 		return;
    136 
    137 	/*
    138 	 * XXX assumes only one controller exists.
    139 	 */
    140 	if ((dv = device_find_by_xname("scsibus0")) != NULL) {
    141 		struct scsibus_softc *sdv = device_private(dv);
    142 		struct scsipi_periph *periph;
    143 
    144 		periph = scsipi_lookup_periph(sdv->sc_channel, ctlr, 0);
    145 		if (periph != NULL) {
    146 			booted_device = periph->periph_dev;
    147 			booted_partition = part;
    148 		}
    149 	}
    150 #endif
    151 }
    152