1 /* $NetBSD: autoconf.c,v 1.38 2014/03/24 20:05:20 christos 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 51 #include <sys/cdefs.h> 52 __KERNEL_RCSID(0, "$NetBSD: autoconf.c,v 1.38 2014/03/24 20:05:20 christos Exp $"); 53 54 #include <sys/param.h> 55 #include <sys/systm.h> 56 #include <sys/buf.h> 57 #include <sys/conf.h> 58 #include <sys/reboot.h> 59 #include <sys/device.h> 60 #include <sys/intr.h> 61 #include <sys/cpu.h> 62 63 #include <dev/scsipi/scsi_all.h> 64 #include <dev/scsipi/scsipi_all.h> 65 #include <dev/scsipi/scsiconf.h> 66 67 #include <machine/adrsmap.h> 68 #include <machine/romcall.h> 69 70 #include <newsmips/newsmips/machid.h> 71 72 #include "scsibus.h" 73 74 /* 75 * The following several variables are related to 76 * the configuration process, and are used in initializing 77 * the machine. 78 */ 79 int cpuspeed = 10; /* approx # instr per usec. */ 80 81 static void findroot(void); 82 83 /* 84 * Determine mass storage and memory configuration for a machine. 85 * Print CPU type, and then iterate over an array of devices 86 * found on the baseboard or in turbochannel option slots. 87 * Once devices are configured, enable interrupts, and probe 88 * for attached scsi devices. 89 */ 90 void 91 cpu_configure(void) 92 { 93 94 /* 95 * Kick off autoconfiguration 96 */ 97 (*disable_intr)(); 98 (void)splhigh(); 99 100 if (config_rootfound("mainbus", NULL) == NULL) 101 panic("no mainbus found"); 102 103 /* Enable hardware interrupt registers. */ 104 (*enable_intr)(); 105 106 /* Configuration is finished, turn on interrupts. */ 107 spl0(); /* enable all source forcing SOFT_INTs cleared */ 108 } 109 110 void 111 cpu_rootconf(void) 112 { 113 findroot(); 114 115 printf("boot device: %s\n", 116 booted_device ? device_xname(booted_device) : "<unknown>"); 117 118 rootconf(); 119 } 120 121 u_long bootdev = 0; /* should be dev_t, but not until 32 bits */ 122 123 /* 124 * Attempt to find the device from which we were booted. 125 */ 126 static void 127 findroot(void) 128 { 129 int ctlr, part, type; 130 device_t dv; 131 132 if (BOOTDEV_MAG(bootdev) != 5) /* NEWS-OS's B_DEVMAGIC */ 133 return; 134 135 ctlr = BOOTDEV_CTLR(bootdev); /* SCSI ID */ 136 part = BOOTDEV_PART(bootdev); /* LUN */ 137 type = BOOTDEV_TYPE(bootdev); 138 139 if (type != BOOTDEV_SD) 140 return; 141 142 /* 143 * XXX assumes only one controller exists. 144 */ 145 if ((dv = device_find_by_xname("scsibus0")) != NULL) { 146 #if NSCSIBUS > 0 147 struct scsibus_softc *sdv = device_private(dv); 148 struct scsipi_periph *periph; 149 150 periph = scsipi_lookup_periph(sdv->sc_channel, ctlr, 0); 151 if (periph != NULL) { 152 booted_device = periph->periph_dev; 153 booted_partition = part; 154 } 155 #endif /* NSCSIBUS > 0 */ 156 } 157 } 158