1 /* $NetBSD: bootbus.c,v 1.23 2021/08/07 16:19:05 thorpej Exp $ */ 2 3 /*- 4 * Copyright (c) 2002 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Jason R. Thorpe. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 /* 33 * Autoconfiguration support for Sun4d "bootbus". 34 */ 35 36 #include <sys/cdefs.h> 37 __KERNEL_RCSID(0, "$NetBSD: bootbus.c,v 1.23 2021/08/07 16:19:05 thorpej Exp $"); 38 39 #include <sys/param.h> 40 #include <sys/malloc.h> 41 #include <sys/kmem.h> 42 #include <sys/systm.h> 43 #include <sys/device.h> 44 45 #include <machine/autoconf.h> 46 #include <sys/bus.h> 47 48 #include <sparc/sparc/cpuunitvar.h> 49 #include <sparc/dev/bootbusvar.h> 50 51 #include "locators.h" 52 53 struct bootbus_softc { 54 int sc_node; /* our OBP node */ 55 56 bus_space_tag_t sc_st; /* ours */ 57 bus_space_tag_t sc_bustag; /* passed on to children */ 58 }; 59 60 static int bootbus_match(device_t, cfdata_t, void *); 61 static void bootbus_attach(device_t, device_t, void *); 62 63 CFATTACH_DECL_NEW(bootbus, sizeof(struct bootbus_softc), 64 bootbus_match, bootbus_attach, NULL, NULL); 65 66 static int bootbus_submatch(device_t, cfdata_t, const int *, void *); 67 static int bootbus_print(void *, const char *); 68 69 static int bootbus_setup_attach_args(struct bootbus_softc *, bus_space_tag_t, 70 int, struct bootbus_attach_args *); 71 static void bootbus_destroy_attach_args(struct bootbus_attach_args *); 72 73 static int 74 bootbus_match(device_t parent, cfdata_t cf, void *aux) 75 { 76 struct cpuunit_attach_args *cpua = aux; 77 78 if (strcmp(cpua->cpua_name, cf->cf_name) == 0) 79 return (1); 80 81 return (0); 82 } 83 84 static void 85 bootbus_attach(device_t parent, device_t self, void *aux) 86 { 87 struct bootbus_softc *sc = device_private(self); 88 struct cpuunit_attach_args *cpua = aux; 89 int node, error; 90 91 sc->sc_node = cpua->cpua_node; 92 sc->sc_st = cpua->cpua_bustag; 93 94 printf("\n"); 95 96 /* 97 * Initialize the bus space tag we pass on to our children. 98 */ 99 sc->sc_bustag = kmem_zalloc(sizeof(*sc->sc_bustag), KM_SLEEP); 100 sc->sc_bustag->cookie = sc; 101 sc->sc_bustag->parent = sc->sc_st; 102 sc->sc_bustag->sparc_bus_map = sc->sc_st->sparc_bus_map; 103 sc->sc_bustag->sparc_bus_mmap = sc->sc_st->sparc_bus_mmap; 104 105 /* 106 * Collect address translations from the OBP. 107 */ 108 error = prom_getprop(sc->sc_node, "ranges", 109 sizeof(struct openprom_range), &sc->sc_bustag->nranges, 110 &sc->sc_bustag->ranges); 111 if (error) { 112 printf("%s: error %d getting \"ranges\" property\n", 113 device_xname(self), error); 114 panic("bootbus_attach"); 115 } 116 117 /* Attach the CPU (and possibly bootbus) child nodes. */ 118 for (node = firstchild(sc->sc_node); node != 0; 119 node = nextsibling(node)) { 120 struct bootbus_attach_args baa; 121 122 if (bootbus_setup_attach_args(sc, sc->sc_bustag, node, &baa)) 123 panic("bootbus_attach: failed to set up attach args"); 124 125 config_found(self, &baa, bootbus_print, 126 CFARGS(.devhandle = prom_node_to_devhandle(node), 127 .submatch = bootbus_submatch)); 128 129 bootbus_destroy_attach_args(&baa); 130 } 131 } 132 133 static int 134 bootbus_submatch(device_t parent, cfdata_t cf, const int *ldesc, void *aux) 135 { 136 struct bootbus_attach_args *baa = aux; 137 138 if (cf->cf_loc[BOOTBUSCF_SLOT] != BOOTBUSCF_SLOT_DEFAULT && 139 cf->cf_loc[BOOTBUSCF_SLOT] != baa->ba_slot) 140 return (0); 141 142 if (cf->cf_loc[BOOTBUSCF_OFFSET] != BOOTBUSCF_OFFSET_DEFAULT && 143 cf->cf_loc[BOOTBUSCF_OFFSET] != baa->ba_offset) 144 return (0); 145 146 return (config_match(parent, cf, aux)); 147 } 148 149 static int 150 bootbus_print(void *aux, const char *pnp) 151 { 152 struct bootbus_attach_args *baa = aux; 153 int i; 154 155 if (pnp) 156 aprint_normal("%s at %s", baa->ba_name, pnp); 157 aprint_normal(" slot %d offset 0x%x", baa->ba_slot, baa->ba_offset); 158 for (i = 0; i < baa->ba_nintr; i++) 159 aprint_normal(" ipl %d", baa->ba_intr[i].oi_pri); 160 161 return (UNCONF); 162 } 163 164 static int 165 bootbus_setup_attach_args(struct bootbus_softc *sc, bus_space_tag_t bustag, 166 int node, struct bootbus_attach_args *baa) 167 { 168 int n, error; 169 170 memset(baa, 0, sizeof(*baa)); 171 172 error = prom_getprop(node, "name", 1, &n, &baa->ba_name); 173 if (error) 174 return (error); 175 baa->ba_name[n] = '\0'; 176 177 baa->ba_bustag = bustag; 178 baa->ba_node = node; 179 180 error = prom_getprop(node, "reg", sizeof(struct openprom_addr), 181 &baa->ba_nreg, &baa->ba_reg); 182 if (error) { 183 bootbus_destroy_attach_args(baa); 184 return (error); 185 } 186 187 error = prom_getprop(node, "intr", sizeof(struct openprom_intr), 188 &baa->ba_nintr, &baa->ba_intr); 189 if (error != 0 && error != ENOENT) { 190 bootbus_destroy_attach_args(baa); 191 return (error); 192 } 193 194 error = prom_getprop(node, "address", sizeof(uint32_t), 195 &baa->ba_npromvaddrs, &baa->ba_promvaddrs); 196 if (error != 0 && error != ENOENT) { 197 bootbus_destroy_attach_args(baa); 198 return (error); 199 } 200 201 return (0); 202 } 203 204 static void 205 bootbus_destroy_attach_args(struct bootbus_attach_args *baa) 206 { 207 208 if (baa->ba_name != NULL) 209 free(baa->ba_name, M_DEVBUF); 210 211 if (baa->ba_reg != NULL) 212 free(baa->ba_reg, M_DEVBUF); 213 214 if (baa->ba_intr != NULL) 215 free(baa->ba_intr, M_DEVBUF); 216 217 if (baa->ba_promvaddrs != NULL) 218 free(baa->ba_promvaddrs, M_DEVBUF); 219 } 220