isa_machdep.c revision 1.5
1 /* $NetBSD: isa_machdep.c,v 1.5 2003/07/15 02:43:41 lukem 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/cdefs.h> 40 __KERNEL_RCSID(0, "$NetBSD: isa_machdep.c,v 1.5 2003/07/15 02:43:41 lukem Exp $"); 41 42 #include <sys/param.h> 43 #include <sys/systm.h> 44 #include <sys/device.h> 45 #include <sys/malloc.h> 46 #include <sys/queue.h> 47 48 #include <machine/sysconf.h> 49 #include <machine/autoconf.h> 50 #include <machine/mainboard.h> 51 #include <machine/bus.h> 52 53 #include <dev/isa/isavar.h> 54 #include <dev/isa/isareg.h> 55 56 static int isabusprint __P((void *auxp, const char *)); 57 static int isabusmatch __P((struct device *, struct cfdata *, void *)); 58 static void isabusattach __P((struct device *, struct device *, void *)); 59 60 struct isabus_softc { 61 struct device sc_dev; 62 struct mipsco_isa_chipset sc_isa_ic; 63 }; 64 65 CFATTACH_DECL(isabus, sizeof(struct isabus_softc), 66 isabusmatch, isabusattach, NULL, NULL); 67 68 extern struct cfdriver isabus_cd; 69 70 static struct mipsco_bus_space isa_io_bst, isa_mem_bst, isa_ctl_bst; 71 static struct mipsco_bus_dma_tag isa_dmatag; 72 73 static void isa_bus_space_init __P((struct mipsco_bus_space *, const char *, 74 paddr_t, size_t)); 75 int isa_intr __P((void *)); 76 77 78 int 79 isabusmatch(pdp, cfp, aux) 80 struct device *pdp; 81 struct cfdata *cfp; 82 void *aux; 83 { 84 struct confargs *ca = aux; 85 86 if (strcmp(ca->ca_name, isabus_cd.cd_name) != 0) 87 return 0; 88 return 1; 89 } 90 91 static void 92 isa_bus_space_init(bst, type, paddr, len) 93 struct mipsco_bus_space *bst; 94 const char *type; 95 paddr_t paddr; 96 size_t len; 97 { 98 vaddr_t vaddr = MIPS_PHYS_TO_KSEG1(paddr); /* XXX */ 99 100 /* Setup default bus_space */ 101 mipsco_bus_space_init(bst, type, paddr, vaddr, 0x0, len); 102 103 /* ISA bus maps 1 word for every byte, therefore stride = 2 */ 104 mipsco_bus_space_set_aligned_stride(bst, 2); 105 106 /* 107 * ISA bus will do an automatic byte swap, but when accessing 108 * memory using bus_space_stream functions we need to byte swap 109 * to reverse the one performed in hardware 110 */ 111 bst->bs_bswap = 1; 112 113 bst->bs_intr_establish = (void *)isa_intr_establish; 114 115 printf(" %s %p", type, (void *)vaddr); 116 } 117 118 119 void 120 isabusattach(pdp, dp, aux) 121 struct device *pdp, *dp; 122 void *aux; 123 { 124 struct isabus_softc *sc = (struct isabus_softc *)dp; 125 struct mipsco_isa_chipset *ic = &sc->sc_isa_ic; 126 struct isabus_attach_args iba; 127 128 printf(":"); 129 130 iba.iba_busname = "isa"; 131 iba.iba_iot = &isa_io_bst; 132 iba.iba_memt = &isa_mem_bst; 133 iba.iba_dmat = &isa_dmatag; 134 iba.iba_ic = ic; 135 136 isa_bus_space_init(&isa_io_bst, "isa_io", PIZAZZ_ISA_IOBASE, 137 PIZAZZ_ISA_IOSIZE); 138 139 isa_bus_space_init(&isa_mem_bst, "isa_mem", PIZAZZ_ISA_MEMBASE, 140 PIZAZZ_ISA_MEMSIZE); 141 142 isa_bus_space_init(&isa_ctl_bst, "isa_intr", PIZAZZ_ISA_INTRLATCH, 143 sizeof(u_int32_t)); 144 145 _bus_dma_tag_init(&isa_dmatag); 146 147 ic->ic_bst = &isa_ctl_bst; 148 149 if (bus_space_map(ic->ic_bst, 0x00000, sizeof(u_int32_t), 150 BUS_SPACE_MAP_LINEAR, &ic->ic_bsh) != 0) { 151 printf(": can't map intrreg\n"); 152 return; 153 } 154 155 /* Clear ISA interrupt latch */ 156 bus_space_write_4(ic->ic_bst, ic->ic_bsh, 0, 0); 157 158 evcnt_attach_dynamic(&ic->ic_intrcnt, EVCNT_TYPE_INTR, NULL, 159 dp->dv_xname, "intr"); 160 161 LIST_INIT(&ic->intr_q); 162 (*platform.intr_establish)(SYS_INTR_ATBUS, isa_intr, ic); 163 164 printf("\n"); 165 config_found(dp, &iba, isabusprint); 166 } 167 168 int 169 isabusprint(auxp, name) 170 void *auxp; 171 const char *name; 172 { 173 if(name == NULL) 174 return(UNCONF); 175 return(QUIET); 176 } 177 178 void 179 isa_attach_hook(parent, self, iba) 180 struct device *parent, *self; 181 struct isabus_attach_args *iba; 182 { 183 } 184 185 const struct evcnt * 186 isa_intr_evcnt(isa_chipset_tag_t ic, int irq) 187 { 188 /* XXX for now, no evcnt parent reported */ 189 return NULL; 190 } 191 192 void * 193 isa_intr_establish(ic, intr, type, level, ih_fun, ih_arg) 194 isa_chipset_tag_t ic; 195 int intr; 196 int type; /* XXX not yet */ 197 int level; /* XXX not yet */ 198 int (*ih_fun) __P((void*)); 199 void *ih_arg; 200 { 201 struct mipsco_intrhand *ih; 202 203 ih = malloc(sizeof *ih, M_DEVBUF, M_NOWAIT); 204 if (ih == NULL) 205 panic("isa_intr_establish: malloc failed"); 206 207 ih->ih_fun = ih_fun; 208 ih->ih_arg = ih_arg; 209 LIST_INSERT_HEAD(&ic->intr_q, ih, ih_q); 210 return ih; 211 } 212 213 void 214 isa_intr_disestablish(ic, cookie) 215 isa_chipset_tag_t ic; 216 void *cookie; 217 { 218 struct mipsco_intrhand *ih = cookie; 219 220 LIST_REMOVE(ih, ih_q); 221 free(ih, M_DEVBUF); 222 } 223 224 int 225 isa_intr_alloc(ic, mask, type, irq) 226 isa_chipset_tag_t ic; 227 int mask; 228 int type; 229 int *irq; 230 { 231 return 0; 232 } 233 234 int 235 isa_intr(arg) 236 void *arg; 237 { 238 struct mipsco_isa_chipset *ic = (struct mipsco_isa_chipset *)arg; 239 struct mipsco_intrhand *ih; 240 int rv, handled; 241 242 ic->ic_intrcnt.ev_count++; 243 244 handled = 0; 245 LIST_FOREACH(ih, &ic->intr_q, ih_q) { 246 /* 247 * The handler returns one of three values: 248 * 0: This interrupt wasn't for me. 249 * 1: This interrupt was for me. 250 * -1: This interrupt might have been for me, but I can't say 251 * for sure. 252 */ 253 rv = (*ih->ih_fun)(ih->ih_arg); 254 handled |= (rv != 0); 255 } 256 257 /* Clear ISA interrupt latch */ 258 bus_space_write_4(ic->ic_bst, ic->ic_bsh, 0, 0); 259 260 return handled; 261 } 262
Indexes created Thu Oct 02 14:10:14 GMT 2025