isa_machdep.c revision 1.9
1 /* $NetBSD: isa_machdep.c,v 1.9 2009/03/14 14:46:02 dsl 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 * 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 #include <sys/cdefs.h> 33 __KERNEL_RCSID(0, "$NetBSD: isa_machdep.c,v 1.9 2009/03/14 14:46:02 dsl Exp $"); 34 35 #include <sys/param.h> 36 #include <sys/systm.h> 37 #include <sys/device.h> 38 #include <sys/malloc.h> 39 #include <sys/queue.h> 40 41 #include <machine/sysconf.h> 42 #include <machine/autoconf.h> 43 #include <machine/mainboard.h> 44 #include <machine/bus.h> 45 46 #include <dev/isa/isavar.h> 47 #include <dev/isa/isareg.h> 48 49 static int mipscoisabusprint(void *auxp, const char *); 50 static int isabusmatch(struct device *, struct cfdata *, void *); 51 static void isabusattach(struct device *, struct device *, void *); 52 53 struct isabus_softc { 54 struct device sc_dev; 55 struct mipsco_isa_chipset sc_isa_ic; 56 }; 57 58 CFATTACH_DECL(isabus, sizeof(struct isabus_softc), 59 isabusmatch, isabusattach, NULL, NULL); 60 61 extern struct cfdriver isabus_cd; 62 63 static struct mipsco_bus_space isa_io_bst, isa_mem_bst, isa_ctl_bst; 64 static struct mipsco_bus_dma_tag isa_dmatag; 65 66 static void isa_bus_space_init(struct mipsco_bus_space *, const char *, 67 paddr_t, size_t); 68 int isa_intr(void *); 69 70 71 int 72 isabusmatch(pdp, cfp, aux) 73 struct device *pdp; 74 struct cfdata *cfp; 75 void *aux; 76 { 77 struct confargs *ca = aux; 78 79 if (strcmp(ca->ca_name, isabus_cd.cd_name) != 0) 80 return 0; 81 return 1; 82 } 83 84 static void 85 isa_bus_space_init(bst, type, paddr, len) 86 struct mipsco_bus_space *bst; 87 const char *type; 88 paddr_t paddr; 89 size_t len; 90 { 91 vaddr_t vaddr = MIPS_PHYS_TO_KSEG1(paddr); /* XXX */ 92 93 /* Setup default bus_space */ 94 mipsco_bus_space_init(bst, type, paddr, vaddr, 0x0, len); 95 96 /* ISA bus maps 1 word for every byte, therefore stride = 2 */ 97 mipsco_bus_space_set_aligned_stride(bst, 2); 98 99 /* 100 * ISA bus will do an automatic byte swap, but when accessing 101 * memory using bus_space_stream functions we need to byte swap 102 * to reverse the one performed in hardware 103 */ 104 bst->bs_bswap = 1; 105 106 bst->bs_intr_establish = (void *)isa_intr_establish; 107 108 printf(" %s %p", type, (void *)vaddr); 109 } 110 111 112 void 113 isabusattach(pdp, dp, aux) 114 struct device *pdp, *dp; 115 void *aux; 116 { 117 struct isabus_softc *sc = (struct isabus_softc *)dp; 118 struct mipsco_isa_chipset *ic = &sc->sc_isa_ic; 119 struct isabus_attach_args iba; 120 121 printf(":"); 122 123 iba.iba_iot = &isa_io_bst; 124 iba.iba_memt = &isa_mem_bst; 125 iba.iba_dmat = &isa_dmatag; 126 iba.iba_ic = ic; 127 128 isa_bus_space_init(&isa_io_bst, "isa_io", PIZAZZ_ISA_IOBASE, 129 PIZAZZ_ISA_IOSIZE); 130 131 isa_bus_space_init(&isa_mem_bst, "isa_mem", PIZAZZ_ISA_MEMBASE, 132 PIZAZZ_ISA_MEMSIZE); 133 134 isa_bus_space_init(&isa_ctl_bst, "isa_intr", PIZAZZ_ISA_INTRLATCH, 135 sizeof(u_int32_t)); 136 137 _bus_dma_tag_init(&isa_dmatag); 138 139 ic->ic_bst = &isa_ctl_bst; 140 141 if (bus_space_map(ic->ic_bst, 0x00000, sizeof(u_int32_t), 142 BUS_SPACE_MAP_LINEAR, &ic->ic_bsh) != 0) { 143 printf(": can't map intrreg\n"); 144 return; 145 } 146 147 /* Clear ISA interrupt latch */ 148 bus_space_write_4(ic->ic_bst, ic->ic_bsh, 0, 0); 149 150 evcnt_attach_dynamic(&ic->ic_intrcnt, EVCNT_TYPE_INTR, NULL, 151 dp->dv_xname, "intr"); 152 153 LIST_INIT(&ic->intr_q); 154 (*platform.intr_establish)(SYS_INTR_ATBUS, isa_intr, ic); 155 156 printf("\n"); 157 config_found_ia(dp, "isabus", &iba, mipscoisabusprint); 158 } 159 160 int 161 mipscoisabusprint(auxp, name) 162 void *auxp; 163 const char *name; 164 { 165 if(name == NULL) 166 return(UNCONF); 167 return(QUIET); 168 } 169 170 void 171 isa_attach_hook(parent, self, iba) 172 struct device *parent, *self; 173 struct isabus_attach_args *iba; 174 { 175 } 176 177 const struct evcnt * 178 isa_intr_evcnt(isa_chipset_tag_t ic, int irq) 179 { 180 /* XXX for now, no evcnt parent reported */ 181 return NULL; 182 } 183 184 void * 185 isa_intr_establish(ic, intr, type, level, ih_fun, ih_arg) 186 isa_chipset_tag_t ic; 187 int intr; 188 int type; /* XXX not yet */ 189 int level; /* XXX not yet */ 190 int (*ih_fun)(void*); 191 void *ih_arg; 192 { 193 struct mipsco_intrhand *ih; 194 195 ih = malloc(sizeof *ih, M_DEVBUF, M_NOWAIT); 196 if (ih == NULL) 197 panic("isa_intr_establish: malloc failed"); 198 199 ih->ih_fun = ih_fun; 200 ih->ih_arg = ih_arg; 201 LIST_INSERT_HEAD(&ic->intr_q, ih, ih_q); 202 return ih; 203 } 204 205 void 206 isa_intr_disestablish(ic, cookie) 207 isa_chipset_tag_t ic; 208 void *cookie; 209 { 210 struct mipsco_intrhand *ih = cookie; 211 212 LIST_REMOVE(ih, ih_q); 213 free(ih, M_DEVBUF); 214 } 215 216 int 217 isa_intr_alloc(ic, mask, type, irq) 218 isa_chipset_tag_t ic; 219 int mask; 220 int type; 221 int *irq; 222 { 223 return 0; 224 } 225 226 int 227 isa_intr(arg) 228 void *arg; 229 { 230 struct mipsco_isa_chipset *ic = (struct mipsco_isa_chipset *)arg; 231 struct mipsco_intrhand *ih; 232 int rv, handled; 233 234 ic->ic_intrcnt.ev_count++; 235 236 handled = 0; 237 LIST_FOREACH(ih, &ic->intr_q, ih_q) { 238 /* 239 * The handler returns one of three values: 240 * 0: This interrupt wasn't for me. 241 * 1: This interrupt was for me. 242 * -1: This interrupt might have been for me, but I can't say 243 * for sure. 244 */ 245 rv = (*ih->ih_fun)(ih->ih_arg); 246 handled |= (rv != 0); 247 } 248 249 /* Clear ISA interrupt latch */ 250 bus_space_write_4(ic->ic_bst, ic->ic_bsh, 0, 0); 251 252 return handled; 253 } 254
Indexes created Thu Oct 02 14:10:14 GMT 2025