1 /* $NetBSD: autoconf.c,v 1.10 2021/04/24 23:36:36 thorpej Exp $ */ 2 /*- 3 * Copyright (c) 2010, 2011 The NetBSD Foundation, Inc. 4 * All rights reserved. 5 * 6 * This code is derived from software contributed to The NetBSD Foundation 7 * by Raytheon BBN Technologies Corp and Defense Advanced Research Projects 8 * Agency and which was developed by Matt Thomas of 3am Software Foundry. 9 * 10 * This material is based upon work supported by the Defense Advanced Research 11 * Projects Agency and Space and Naval Warfare Systems Center, Pacific, under 12 * Contract No. N66001-09-C-2073. 13 * Approved for Public Release, Distribution Unlimited 14 * 15 * Redistribution and use in source and binary forms, with or without 16 * modification, are permitted provided that the following conditions 17 * are met: 18 * 1. Redistributions of source code must retain the above copyright 19 * notice, this list of conditions and the following disclaimer. 20 * 2. Redistributions in binary form must reproduce the above copyright 21 * notice, this list of conditions and the following disclaimer in the 22 * documentation and/or other materials provided with the distribution. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 25 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 26 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 27 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 28 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 29 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 30 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 31 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 32 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 33 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 34 * POSSIBILITY OF SUCH DAMAGE. 35 */ 36 37 #include <sys/cdefs.h> 38 __KERNEL_RCSID(0, "$NetBSD: autoconf.c,v 1.10 2021/04/24 23:36:36 thorpej Exp $"); 39 40 #define __INTR_PRIVATE 41 42 #include "locators.h" 43 44 #include <sys/param.h> 45 #include <sys/conf.h> 46 #include <sys/cpu.h> 47 #include <sys/device.h> 48 #include <sys/intr.h> 49 #include <sys/kernel.h> 50 #include <sys/proc.h> 51 #include <sys/systm.h> 52 53 #include <powerpc/booke/cpuvar.h> 54 55 /* 56 * Determine device configuration for a machine. 57 */ 58 void 59 cpu_configure(void) 60 { 61 62 intr_init(); 63 calc_delayconst(); 64 65 if (config_rootfound("mainbus", NULL) == NULL) 66 panic("%s: mainbus not configured", __func__); 67 68 spl0(); 69 } 70 71 static volatile int rootconf_timo = 1; 72 73 /* 74 * Setup root device. 75 * Configure swap area. 76 */ 77 void 78 cpu_rootconf(void) 79 { 80 /* 81 * We wait up to 10 seconds for a bootable device to be found. 82 */ 83 while (rootconf_timo > 0) { 84 if (booted_device != NULL) { 85 aprint_normal_dev(booted_device, "boot device\n"); 86 break; 87 } 88 89 if (root_string[0] != '\0' 90 && (booted_device = device_find_by_xname(root_string)) != NULL) { 91 aprint_normal_dev(booted_device, "boot device\n"); 92 break; 93 } 94 95 if (EWOULDBLOCK == kpause("autoconf", true, 1, NULL)) { 96 rootconf_timo--; 97 } 98 } 99 100 rootconf(); 101 } 102 103 void 104 device_register(device_t dev, void *aux) 105 { 106 if (cpu_md_ops.md_device_register != NULL) 107 (*cpu_md_ops.md_device_register)(dev, aux); 108 109 if (booted_device == NULL) { 110 if (root_string[0] != '\0' 111 && !strcmp(device_xname(dev), root_string)) { 112 aprint_normal_dev(dev, "boot device\n"); 113 booted_device = dev; 114 } else { 115 rootconf_timo = 5 * hz; 116 } 117 } 118 } 119 120 static bool mainbus_found; 121 122 static int 123 mainbus_print(void *aux, const char *pnp) 124 { 125 struct mainbus_attach_args *ma = aux; 126 127 if (pnp != NULL) 128 return QUIET; 129 130 if (pnp) 131 aprint_normal("%s at %s", ma->ma_name, pnp); 132 if (ma->ma_node != MAINBUSCF_NODE_DEFAULT) 133 aprint_normal(" node %d", ma->ma_node); 134 135 return (UNCONF); 136 } 137 138 static int 139 mainbus_match(device_t parent, cfdata_t cf, void *aux) 140 { 141 return mainbus_found == false; 142 } 143 144 static void 145 mainbus_attach(device_t parent, device_t self, void *aux) 146 { 147 struct mainbus_attach_args ma; 148 149 mainbus_found = true; 150 151 aprint_normal("\n"); 152 153 ma.ma_name = "cpunode"; 154 ma.ma_node = 0; 155 ma.ma_memt = curcpu()->ci_softc->cpu_bst; 156 ma.ma_le_memt = curcpu()->ci_softc->cpu_le_bst; 157 ma.ma_dmat = &booke_bus_dma_tag; 158 159 config_found(self, &ma, mainbus_print, CFARG_EOL); 160 } 161 162 CFATTACH_DECL_NEW(mainbus, 0, mainbus_match, mainbus_attach, NULL, NULL); 163