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autoconf.c revision 1.10 
      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