pci_eb164.c revision 1.3
1 /* $NetBSD: pci_eb164.c,v 1.3 1996/11/17 02:30:25 cgd 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/types.h> 31 #include <sys/param.h> 32 #include <sys/time.h> 33 #include <sys/systm.h> 34 #include <sys/errno.h> 35 #include <sys/malloc.h> 36 #include <sys/device.h> 37 #include <sys/syslog.h> 38 39 #include <vm/vm.h> 40 41 #include <machine/autoconf.h> 42 43 #include <dev/pci/pcireg.h> 44 #include <dev/pci/pcivar.h> 45 46 #include <alpha/pci/ciareg.h> 47 #include <alpha/pci/ciavar.h> 48 49 #include <alpha/pci/pci_eb164.h> 50 51 #ifndef EVCNT_COUNTERS 52 #include <machine/intrcnt.h> 53 #endif 54 55 #include "sio.h" 56 #if NSIO 57 #include <alpha/pci/siovar.h> 58 #endif 59 60 int dec_eb164_intr_map __P((void *, pcitag_t, int, int, 61 pci_intr_handle_t *)); 62 const char *dec_eb164_intr_string __P((void *, pci_intr_handle_t)); 63 void *dec_eb164_intr_establish __P((void *, pci_intr_handle_t, 64 int, int (*func)(void *), void *)); 65 void dec_eb164_intr_disestablish __P((void *, void *)); 66 67 #define EB164_SIO_IRQ 4 68 #define EB164_MAX_IRQ 24 69 #define PCI_STRAY_MAX 5 70 71 struct alpha_shared_intr *eb164_pci_intr; 72 #ifdef EVCNT_COUNTERS 73 struct evcnt eb164_intr_evcnt; 74 #endif 75 76 bus_space_tag_t eb164_intrgate_iot; 77 bus_space_handle_t eb164_intrgate_ioh; 78 79 void eb164_iointr __P((void *framep, unsigned long vec)); 80 void eb164_enable_intr __P((int irq)); 81 void eb164_disable_intr __P((int irq)); 82 83 void 84 pci_eb164_pickintr(ccp) 85 struct cia_config *ccp; 86 { 87 bus_space_tag_t iot = ccp->cc_iot; 88 pci_chipset_tag_t pc = &ccp->cc_pc; 89 int i; 90 91 pc->pc_intr_v = ccp; 92 pc->pc_intr_map = dec_eb164_intr_map; 93 pc->pc_intr_string = dec_eb164_intr_string; 94 pc->pc_intr_establish = dec_eb164_intr_establish; 95 pc->pc_intr_disestablish = dec_eb164_intr_disestablish; 96 97 eb164_intrgate_iot = iot; 98 if (bus_space_map(eb164_intrgate_iot, 0x804, 3, 0, 99 &eb164_intrgate_ioh) != 0) 100 panic("pci_eb164_pickintr: couldn't map interrupt PLD"); 101 for (i = 0; i < EB164_MAX_IRQ; i++) 102 eb164_disable_intr(i); 103 104 eb164_pci_intr = alpha_shared_intr_alloc(EB164_MAX_IRQ); 105 for (i = 0; i < EB164_MAX_IRQ; i++) 106 alpha_shared_intr_set_maxstrays(eb164_pci_intr, i, 107 PCI_STRAY_MAX); 108 109 #if NSIO 110 sio_intr_setup(iot); 111 eb164_enable_intr(EB164_SIO_IRQ); 112 #endif 113 114 set_iointr(eb164_iointr); 115 } 116 117 int 118 dec_eb164_intr_map(ccv, bustag, buspin, line, ihp) 119 void *ccv; 120 pcitag_t bustag; 121 int buspin, line; 122 pci_intr_handle_t *ihp; 123 { 124 struct cia_config *ccp = ccv; 125 pci_chipset_tag_t pc = &ccp->cc_pc; 126 int device; 127 int eb164_irq, pinbase, pinoff; 128 129 if (buspin == 0) { 130 /* No IRQ used. */ 131 return 1; 132 } 133 if (buspin > 4) { 134 printf("pci_map_int: bad interrupt pin %d\n", buspin); 135 return 1; 136 } 137 138 pci_decompose_tag(pc, bustag, NULL, &device, NULL); 139 switch (device) { 140 #if 0 /* THIS CODE SHOULD NEVER BE CALLED FOR THE SIO */ 141 case 8: /* SIO */ 142 eb164_irq = 4; 143 break; 144 #endif 145 146 case 11: 147 eb164_irq = 5; /* IDE */ 148 break; 149 150 case 6: 151 case 7: 152 case 8: 153 case 9: 154 switch (buspin) { 155 case 1: 156 pinbase = 0; 157 break; 158 case 2: 159 case 3: 160 case 4: 161 pinbase = (buspin * 4) - 1; 162 break; 163 #ifdef DIAGNOSTIC 164 default: 165 panic("dec_eb164_intr_map: slot buspin switch"); 166 #endif 167 }; 168 switch (device) { 169 case 5: 170 pinoff = 2; 171 break; 172 173 case 6: 174 case 7: 175 case 9: 176 pinoff = device - 6; 177 break; 178 #ifdef DIAGNOSTIC 179 default: 180 panic("dec_eb164_intr_map: slot device switch"); 181 #endif 182 } 183 eb164_irq = pinoff + pinbase; 184 break; 185 default: 186 panic("pci_eb164_map_int: invalid device number %d\n", 187 device); 188 } 189 190 if (eb164_irq > EB164_MAX_IRQ) 191 panic("pci_eb164_map_int: eb164_irq too large (%d)\n", 192 eb164_irq); 193 194 *ihp = eb164_irq; 195 return (0); 196 } 197 198 const char * 199 dec_eb164_intr_string(ccv, ih) 200 void *ccv; 201 pci_intr_handle_t ih; 202 { 203 #if 0 204 struct cia_config *ccp = ccv; 205 #endif 206 static char irqstr[15]; /* 11 + 2 + NULL + sanity */ 207 208 if (ih > EB164_MAX_IRQ) 209 panic("dec_eb164_intr_string: bogus eb164 IRQ 0x%x\n", ih); 210 sprintf(irqstr, "eb164 irq %d", ih); 211 return (irqstr); 212 } 213 214 void * 215 dec_eb164_intr_establish(ccv, ih, level, func, arg) 216 void *ccv, *arg; 217 pci_intr_handle_t ih; 218 int level; 219 int (*func) __P((void *)); 220 { 221 #if 0 222 struct cia_config *ccp = ccv; 223 #endif 224 void *cookie; 225 226 if (ih > EB164_MAX_IRQ) 227 panic("dec_eb164_intr_establish: bogus eb164 IRQ 0x%x\n", ih); 228 229 cookie = alpha_shared_intr_establish(eb164_pci_intr, ih, IST_LEVEL, 230 level, func, arg, "eb164 irq"); 231 232 if (cookie != NULL && alpha_shared_intr_isactive(eb164_pci_intr, ih)) 233 eb164_enable_intr(ih); 234 return (cookie); 235 } 236 237 void 238 dec_eb164_intr_disestablish(ccv, cookie) 239 void *ccv, *cookie; 240 { 241 #if 0 242 struct cia_config *ccp = ccv; 243 #endif 244 245 panic("dec_eb164_intr_disestablish not implemented"); /* XXX */ 246 } 247 248 void 249 eb164_iointr(framep, vec) 250 void *framep; 251 unsigned long vec; 252 { 253 int irq; 254 255 if (vec >= 0x900) { 256 if (vec >= 0x900 + (EB164_MAX_IRQ << 4)) 257 panic("eb164_iointr: vec 0x%x out of range\n", vec); 258 irq = (vec - 0x900) >> 4; 259 260 #ifdef EVCNT_COUNTERS 261 eb164_intr_evcnt.ev_count++; 262 #else 263 if (EB164_MAX_IRQ != INTRCNT_EB164_IRQ_LEN) 264 panic("eb164 interrupt counter sizes inconsistent"); 265 intrcnt[INTRCNT_EB164_IRQ + irq]++; 266 #endif 267 268 if (!alpha_shared_intr_dispatch(eb164_pci_intr, irq)) { 269 alpha_shared_intr_stray(eb164_pci_intr, irq, 270 "eb164 irq"); 271 if (eb164_pci_intr[irq].intr_nstrays == 272 eb164_pci_intr[irq].intr_maxstrays) 273 eb164_disable_intr(irq); 274 } 275 return; 276 } 277 #if NSIO 278 if (vec >= 0x800) { 279 sio_iointr(framep, vec); 280 return; 281 } 282 #endif 283 panic("eb164_iointr: weird vec 0x%x\n", vec); 284 } 285 286 u_int8_t eb164_intr_mask[3] = { 0xff, 0xff, 0xff }; 287 288 void 289 eb164_enable_intr(irq) 290 int irq; 291 { 292 int byte = (irq / 8), bit = (irq % 8); 293 294 #if 1 295 printf("eb164_enable_intr: enabling %d (%d:%d)\n", irq, byte, bit); 296 #endif 297 eb164_intr_mask[byte] &= ~(1 << bit); 298 299 bus_space_write_1(eb164_intrgate_iot, eb164_intrgate_ioh, byte, 300 eb164_intr_mask[byte]); 301 } 302 303 void 304 eb164_disable_intr(irq) 305 int irq; 306 { 307 int byte = (irq / 8), bit = (irq % 8); 308 309 #if 1 310 printf("eb164_disable_intr: disabling %d (%d:%d)\n", irq, byte, bit); 311 #endif 312 eb164_intr_mask[byte] |= (1 << bit); 313 314 bus_space_write_1(eb164_intrgate_iot, eb164_intrgate_ioh, byte, 315 eb164_intr_mask[byte]); 316 } 317
Indexes created Mon Sep 29 21:09:56 GMT 2025