isa_machdep.c revision 1.4
1 /* $NetBSD: isa_machdep.c,v 1.4 2002/10/02 05:38:09 thorpej Exp $ */ 2 3 /* 4 * Copyright (c) 2001 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Wayne Knowles 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 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 #include <sys/param.h> 40 #include <sys/systm.h> 41 #include <sys/device.h> 42 #include <sys/malloc.h> 43 #include <sys/queue.h> 44 45 #include <machine/sysconf.h> 46 #include <machine/autoconf.h> 47 #include <machine/mainboard.h> 48 #include <machine/bus.h> 49 50 #include <dev/isa/isavar.h> 51 #include <dev/isa/isareg.h> 52 53 static int isabusprint __P((void *auxp, const char *)); 54 static int isabusmatch __P((struct device *, struct cfdata *, void *)); 55 static void isabusattach __P((struct device *, struct device *, void *)); 56 57 struct isabus_softc { 58 struct device sc_dev; 59 struct mipsco_isa_chipset sc_isa_ic; 60 }; 61 62 CFATTACH_DECL(isabus, sizeof(struct isabus_softc), 63 isabusmatch, isabusattach, NULL, NULL); 64 65 extern struct cfdriver isabus_cd; 66 67 static struct mipsco_bus_space isa_io_bst, isa_mem_bst, isa_ctl_bst; 68 static struct mipsco_bus_dma_tag isa_dmatag; 69 70 static void isa_bus_space_init __P((struct mipsco_bus_space *, const char *, 71 paddr_t, size_t)); 72 int isa_intr __P((void *)); 73 74 75 int 76 isabusmatch(pdp, cfp, aux) 77 struct device *pdp; 78 struct cfdata *cfp; 79 void *aux; 80 { 81 struct confargs *ca = aux; 82 83 if (strcmp(ca->ca_name, isabus_cd.cd_name) != 0) 84 return 0; 85 return 1; 86 } 87 88 static void 89 isa_bus_space_init(bst, type, paddr, len) 90 struct mipsco_bus_space *bst; 91 const char *type; 92 paddr_t paddr; 93 size_t len; 94 { 95 vaddr_t vaddr = MIPS_PHYS_TO_KSEG1(paddr); /* XXX */ 96 97 /* Setup default bus_space */ 98 mipsco_bus_space_init(bst, type, paddr, vaddr, 0x0, len); 99 100 /* ISA bus maps 1 word for every byte, therefore stride = 2 */ 101 mipsco_bus_space_set_aligned_stride(bst, 2); 102 103 /* 104 * ISA bus will do an automatic byte swap, but when accessing 105 * memory using bus_space_stream functions we need to byte swap 106 * to reverse the one performed in hardware 107 */ 108 bst->bs_bswap = 1; 109 110 bst->bs_intr_establish = (void *)isa_intr_establish; 111 112 printf(" %s %p", type, (void *)vaddr); 113 } 114 115 116 void 117 isabusattach(pdp, dp, aux) 118 struct device *pdp, *dp; 119 void *aux; 120 { 121 struct isabus_softc *sc = (struct isabus_softc *)dp; 122 struct mipsco_isa_chipset *ic = &sc->sc_isa_ic; 123 struct isabus_attach_args iba; 124 125 printf(":"); 126 127 iba.iba_busname = "isa"; 128 iba.iba_iot = &isa_io_bst; 129 iba.iba_memt = &isa_mem_bst; 130 iba.iba_dmat = &isa_dmatag; 131 iba.iba_ic = ic; 132 133 isa_bus_space_init(&isa_io_bst, "isa_io", PIZAZZ_ISA_IOBASE, 134 PIZAZZ_ISA_IOSIZE); 135 136 isa_bus_space_init(&isa_mem_bst, "isa_mem", PIZAZZ_ISA_MEMBASE, 137 PIZAZZ_ISA_MEMSIZE); 138 139 isa_bus_space_init(&isa_ctl_bst, "isa_intr", PIZAZZ_ISA_INTRLATCH, 140 sizeof(u_int32_t)); 141 142 _bus_dma_tag_init(&isa_dmatag); 143 144 ic->ic_bst = &isa_ctl_bst; 145 146 if (bus_space_map(ic->ic_bst, 0x00000, sizeof(u_int32_t), 147 BUS_SPACE_MAP_LINEAR, &ic->ic_bsh) != 0) { 148 printf(": can't map intrreg\n"); 149 return; 150 } 151 152 /* Clear ISA interrupt latch */ 153 bus_space_write_4(ic->ic_bst, ic->ic_bsh, 0, 0); 154 155 evcnt_attach_dynamic(&ic->ic_intrcnt, EVCNT_TYPE_INTR, NULL, 156 dp->dv_xname, "intr"); 157 158 LIST_INIT(&ic->intr_q); 159 (*platform.intr_establish)(SYS_INTR_ATBUS, isa_intr, ic); 160 161 printf("\n"); 162 config_found(dp, &iba, isabusprint); 163 } 164 165 int 166 isabusprint(auxp, name) 167 void *auxp; 168 const char *name; 169 { 170 if(name == NULL) 171 return(UNCONF); 172 return(QUIET); 173 } 174 175 void 176 isa_attach_hook(parent, self, iba) 177 struct device *parent, *self; 178 struct isabus_attach_args *iba; 179 { 180 } 181 182 const struct evcnt * 183 isa_intr_evcnt(isa_chipset_tag_t ic, int irq) 184 { 185 /* XXX for now, no evcnt parent reported */ 186 return NULL; 187 } 188 189 void * 190 isa_intr_establish(ic, intr, type, level, ih_fun, ih_arg) 191 isa_chipset_tag_t ic; 192 int intr; 193 int type; /* XXX not yet */ 194 int level; /* XXX not yet */ 195 int (*ih_fun) __P((void*)); 196 void *ih_arg; 197 { 198 struct mipsco_intrhand *ih; 199 200 ih = malloc(sizeof *ih, M_DEVBUF, M_NOWAIT); 201 if (ih == NULL) 202 panic("isa_intr_establish: malloc failed"); 203 204 ih->ih_fun = ih_fun; 205 ih->ih_arg = ih_arg; 206 LIST_INSERT_HEAD(&ic->intr_q, ih, ih_q); 207 return ih; 208 } 209 210 void 211 isa_intr_disestablish(ic, cookie) 212 isa_chipset_tag_t ic; 213 void *cookie; 214 { 215 struct mipsco_intrhand *ih = cookie; 216 217 LIST_REMOVE(ih, ih_q); 218 free(ih, M_DEVBUF); 219 } 220 221 int 222 isa_intr_alloc(ic, mask, type, irq) 223 isa_chipset_tag_t ic; 224 int mask; 225 int type; 226 int *irq; 227 { 228 return 0; 229 } 230 231 int 232 isa_intr(arg) 233 void *arg; 234 { 235 struct mipsco_isa_chipset *ic = (struct mipsco_isa_chipset *)arg; 236 struct mipsco_intrhand *ih; 237 int rv, handled; 238 239 ic->ic_intrcnt.ev_count++; 240 241 handled = 0; 242 LIST_FOREACH(ih, &ic->intr_q, ih_q) { 243 /* 244 * The handler returns one of three values: 245 * 0: This interrupt wasn't for me. 246 * 1: This interrupt was for me. 247 * -1: This interrupt might have been for me, but I can't say 248 * for sure. 249 */ 250 rv = (*ih->ih_fun)(ih->ih_arg); 251 handled |= (rv != 0); 252 } 253 254 /* Clear ISA interrupt latch */ 255 bus_space_write_4(ic->ic_bst, ic->ic_bsh, 0, 0); 256 257 return handled; 258 } 259
Indexes created Thu Oct 02 14:10:14 GMT 2025