pci_eb164.c revision 1.10
1 /* $NetBSD: pci_eb164.c,v 1.10 1997/09/02 20:10:30 thorpej Exp $ */ 2 3 /* 4 * Copyright (c) 1995, 1996 Carnegie-Mellon University. 5 * All rights reserved. 6 * 7 * Author: Chris G. Demetriou 8 * 9 * Permission to use, copy, modify and distribute this software and 10 * its documentation is hereby granted, provided that both the copyright 11 * notice and this permission notice appear in all copies of the 12 * software, derivative works or modified versions, and any portions 13 * thereof, and that both notices appear in supporting documentation. 14 * 15 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" 16 * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND 17 * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. 18 * 19 * Carnegie Mellon requests users of this software to return to 20 * 21 * Software Distribution Coordinator or Software.Distribution (at) CS.CMU.EDU 22 * School of Computer Science 23 * Carnegie Mellon University 24 * Pittsburgh PA 15213-3890 25 * 26 * any improvements or extensions that they make and grant Carnegie the 27 * rights to redistribute these changes. 28 */ 29 30 #include <sys/cdefs.h> /* RCS ID & Copyright macro defns */ 31 32 __KERNEL_RCSID(0, "$NetBSD: pci_eb164.c,v 1.10 1997/09/02 20:10:30 thorpej Exp $"); 33 34 #include <sys/types.h> 35 #include <sys/param.h> 36 #include <sys/time.h> 37 #include <sys/systm.h> 38 #include <sys/errno.h> 39 #include <sys/malloc.h> 40 #include <sys/device.h> 41 #include <sys/syslog.h> 42 43 #include <vm/vm.h> 44 45 #include <machine/autoconf.h> 46 47 #include <dev/pci/pcireg.h> 48 #include <dev/pci/pcivar.h> 49 50 #include <alpha/pci/ciareg.h> 51 #include <alpha/pci/ciavar.h> 52 53 #include <alpha/pci/pci_eb164.h> 54 55 #ifndef EVCNT_COUNTERS 56 #include <machine/intrcnt.h> 57 #endif 58 59 #include "sio.h" 60 #if NSIO 61 #include <alpha/pci/siovar.h> 62 #endif 63 64 int dec_eb164_intr_map __P((void *, pcitag_t, int, int, 65 pci_intr_handle_t *)); 66 const char *dec_eb164_intr_string __P((void *, pci_intr_handle_t)); 67 void *dec_eb164_intr_establish __P((void *, pci_intr_handle_t, 68 int, int (*func)(void *), void *)); 69 void dec_eb164_intr_disestablish __P((void *, void *)); 70 71 #define EB164_SIO_IRQ 4 72 #define EB164_MAX_IRQ 24 73 #define PCI_STRAY_MAX 5 74 75 struct alpha_shared_intr *eb164_pci_intr; 76 #ifdef EVCNT_COUNTERS 77 struct evcnt eb164_intr_evcnt; 78 #endif 79 80 bus_space_tag_t eb164_intrgate_iot; 81 bus_space_handle_t eb164_intrgate_ioh; 82 83 void eb164_iointr __P((void *framep, unsigned long vec)); 84 extern void eb164_intr_enable __P((int irq)); /* pci_eb164_intr.S */ 85 extern void eb164_intr_disable __P((int irq)); /* pci_eb164_intr.S */ 86 87 void 88 pci_eb164_pickintr(ccp) 89 struct cia_config *ccp; 90 { 91 bus_space_tag_t iot = &ccp->cc_iot; 92 pci_chipset_tag_t pc = &ccp->cc_pc; 93 int i; 94 95 pc->pc_intr_v = ccp; 96 pc->pc_intr_map = dec_eb164_intr_map; 97 pc->pc_intr_string = dec_eb164_intr_string; 98 pc->pc_intr_establish = dec_eb164_intr_establish; 99 pc->pc_intr_disestablish = dec_eb164_intr_disestablish; 100 101 eb164_intrgate_iot = iot; 102 if (bus_space_map(eb164_intrgate_iot, 0x804, 3, 0, 103 &eb164_intrgate_ioh) != 0) 104 panic("pci_eb164_pickintr: couldn't map interrupt PLD"); 105 for (i = 0; i < EB164_MAX_IRQ; i++) 106 eb164_intr_disable(i); 107 108 eb164_pci_intr = alpha_shared_intr_alloc(EB164_MAX_IRQ); 109 for (i = 0; i < EB164_MAX_IRQ; i++) 110 alpha_shared_intr_set_maxstrays(eb164_pci_intr, i, 111 PCI_STRAY_MAX); 112 113 #if NSIO 114 sio_intr_setup(iot); 115 eb164_intr_enable(EB164_SIO_IRQ); 116 #endif 117 118 set_iointr(eb164_iointr); 119 } 120 121 int 122 dec_eb164_intr_map(ccv, bustag, buspin, line, ihp) 123 void *ccv; 124 pcitag_t bustag; 125 int buspin, line; 126 pci_intr_handle_t *ihp; 127 { 128 struct cia_config *ccp = ccv; 129 pci_chipset_tag_t pc = &ccp->cc_pc; 130 int device; 131 int eb164_irq, pinbase, pinoff; 132 133 #ifndef DIAGNOSTIC 134 pinbase = pinoff = 0; /* XXX gcc -Wuninitialized */ 135 #endif 136 137 if (buspin == 0) { 138 /* No IRQ used. */ 139 return 1; 140 } 141 if (buspin > 4) { 142 printf("pci_map_int: bad interrupt pin %d\n", buspin); 143 return 1; 144 } 145 146 alpha_pci_decompose_tag(pc, bustag, NULL, &device, NULL); 147 switch (device) { 148 #if 0 /* THIS CODE SHOULD NEVER BE CALLED FOR THE SIO */ 149 case 8: /* SIO */ 150 eb164_irq = 4; 151 break; 152 #endif 153 154 case 11: 155 eb164_irq = 5; /* IDE */ 156 break; 157 158 case 5: 159 case 6: 160 case 7: 161 case 9: 162 switch (buspin) { 163 case 1: 164 pinbase = 0; 165 break; 166 case 2: 167 case 3: 168 case 4: 169 pinbase = (buspin * 4) - 1; 170 break; 171 #ifdef DIAGNOSTIC 172 default: 173 panic("dec_eb164_intr_map: slot buspin switch"); 174 #endif 175 }; 176 switch (device) { 177 case 5: 178 pinoff = 2; 179 break; 180 181 case 6: 182 case 7: 183 case 9: 184 pinoff = device - 6; 185 break; 186 #ifdef DIAGNOSTIC 187 default: 188 panic("dec_eb164_intr_map: slot device switch"); 189 #endif 190 } 191 eb164_irq = pinoff + pinbase; 192 break; 193 default: 194 panic("pci_eb164_map_int: invalid device number %d\n", 195 device); 196 } 197 198 if (eb164_irq > EB164_MAX_IRQ) 199 panic("pci_eb164_map_int: eb164_irq too large (%d)\n", 200 eb164_irq); 201 202 *ihp = eb164_irq; 203 return (0); 204 } 205 206 const char * 207 dec_eb164_intr_string(ccv, ih) 208 void *ccv; 209 pci_intr_handle_t ih; 210 { 211 #if 0 212 struct cia_config *ccp = ccv; 213 #endif 214 static char irqstr[15]; /* 11 + 2 + NULL + sanity */ 215 216 if (ih > EB164_MAX_IRQ) 217 panic("dec_eb164_intr_string: bogus eb164 IRQ 0x%x\n", ih); 218 sprintf(irqstr, "eb164 irq %d", ih); 219 return (irqstr); 220 } 221 222 void * 223 dec_eb164_intr_establish(ccv, ih, level, func, arg) 224 void *ccv, *arg; 225 pci_intr_handle_t ih; 226 int level; 227 int (*func) __P((void *)); 228 { 229 #if 0 230 struct cia_config *ccp = ccv; 231 #endif 232 void *cookie; 233 234 if (ih > EB164_MAX_IRQ) 235 panic("dec_eb164_intr_establish: bogus eb164 IRQ 0x%x\n", ih); 236 237 cookie = alpha_shared_intr_establish(eb164_pci_intr, ih, IST_LEVEL, 238 level, func, arg, "eb164 irq"); 239 240 if (cookie != NULL && alpha_shared_intr_isactive(eb164_pci_intr, ih)) 241 eb164_intr_enable(ih); 242 return (cookie); 243 } 244 245 void 246 dec_eb164_intr_disestablish(ccv, cookie) 247 void *ccv, *cookie; 248 { 249 #if 0 250 struct cia_config *ccp = ccv; 251 #endif 252 253 panic("dec_eb164_intr_disestablish not implemented"); /* XXX */ 254 } 255 256 void 257 eb164_iointr(framep, vec) 258 void *framep; 259 unsigned long vec; 260 { 261 int irq; 262 263 if (vec >= 0x900) { 264 if (vec >= 0x900 + (EB164_MAX_IRQ << 4)) 265 panic("eb164_iointr: vec 0x%x out of range\n", vec); 266 irq = (vec - 0x900) >> 4; 267 268 #ifdef EVCNT_COUNTERS 269 eb164_intr_evcnt.ev_count++; 270 #else 271 if (EB164_MAX_IRQ != INTRCNT_EB164_IRQ_LEN) 272 panic("eb164 interrupt counter sizes inconsistent"); 273 intrcnt[INTRCNT_EB164_IRQ + irq]++; 274 #endif 275 276 if (!alpha_shared_intr_dispatch(eb164_pci_intr, irq)) { 277 alpha_shared_intr_stray(eb164_pci_intr, irq, 278 "eb164 irq"); 279 if (eb164_pci_intr[irq].intr_nstrays == 280 eb164_pci_intr[irq].intr_maxstrays) 281 eb164_intr_disable(irq); 282 } 283 return; 284 } 285 #if NSIO 286 if (vec >= 0x800) { 287 sio_iointr(framep, vec); 288 return; 289 } 290 #endif 291 panic("eb164_iointr: weird vec 0x%x\n", vec); 292 } 293 294 #if 0 /* THIS DOES NOT WORK! see pci_eb164_intr.S. */ 295 u_int8_t eb164_intr_mask[3] = { 0xff, 0xff, 0xff }; 296 297 void 298 eb164_intr_enable(irq) 299 int irq; 300 { 301 int byte = (irq / 8), bit = (irq % 8); 302 303 #if 1 304 printf("eb164_intr_enable: enabling %d (%d:%d)\n", irq, byte, bit); 305 #endif 306 eb164_intr_mask[byte] &= ~(1 << bit); 307 308 bus_space_write_1(eb164_intrgate_iot, eb164_intrgate_ioh, byte, 309 eb164_intr_mask[byte]); 310 } 311 312 void 313 eb164_intr_disable(irq) 314 int irq; 315 { 316 int byte = (irq / 8), bit = (irq % 8); 317 318 #if 1 319 printf("eb164_intr_disable: disabling %d (%d:%d)\n", irq, byte, bit); 320 #endif 321 eb164_intr_mask[byte] |= (1 << bit); 322 323 bus_space_write_1(eb164_intrgate_iot, eb164_intrgate_ioh, byte, 324 eb164_intr_mask[byte]); 325 } 326 #endif 327
Indexes created Mon Sep 29 15:09:53 GMT 2025