pci_kn20aa.c revision 1.35
1 /* $NetBSD: pci_kn20aa.c,v 1.35 1998/10/31 23:51:05 mjacob 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_kn20aa.c,v 1.35 1998/10/31 23:51:05 mjacob 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_kn20aa.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_kn20aa_intr_map __P((void *, pcitag_t, int, int, 65 pci_intr_handle_t *)); 66 const char *dec_kn20aa_intr_string __P((void *, pci_intr_handle_t)); 67 void *dec_kn20aa_intr_establish __P((void *, pci_intr_handle_t, 68 int, int (*func)(void *), void *)); 69 void dec_kn20aa_intr_disestablish __P((void *, void *)); 70 71 #define KN20AA_PCEB_IRQ 31 72 #define KN20AA_MAX_IRQ 32 73 #define PCI_STRAY_MAX 5 74 75 struct alpha_shared_intr *kn20aa_pci_intr; 76 #ifdef EVCNT_COUNTERS 77 struct evcnt kn20aa_intr_evcnt; 78 #endif 79 80 void kn20aa_iointr __P((void *framep, unsigned long vec)); 81 void kn20aa_enable_intr __P((int irq)); 82 void kn20aa_disable_intr __P((int irq)); 83 84 void 85 pci_kn20aa_pickintr(ccp) 86 struct cia_config *ccp; 87 { 88 int i; 89 #if NSIO 90 bus_space_tag_t iot = &ccp->cc_iot; 91 #endif 92 pci_chipset_tag_t pc = &ccp->cc_pc; 93 94 pc->pc_intr_v = ccp; 95 pc->pc_intr_map = dec_kn20aa_intr_map; 96 pc->pc_intr_string = dec_kn20aa_intr_string; 97 pc->pc_intr_establish = dec_kn20aa_intr_establish; 98 pc->pc_intr_disestablish = dec_kn20aa_intr_disestablish; 99 100 /* Not supported on KN20AA. */ 101 pc->pc_pciide_compat_intr_establish = NULL; 102 103 kn20aa_pci_intr = alpha_shared_intr_alloc(KN20AA_MAX_IRQ); 104 for (i = 0; i < KN20AA_MAX_IRQ; i++) 105 alpha_shared_intr_set_maxstrays(kn20aa_pci_intr, i, 106 PCI_STRAY_MAX); 107 108 #if NSIO 109 sio_intr_setup(pc, iot); 110 kn20aa_enable_intr(KN20AA_PCEB_IRQ); 111 #endif 112 113 set_iointr(kn20aa_iointr); 114 } 115 116 int 117 dec_kn20aa_intr_map(ccv, bustag, buspin, line, ihp) 118 void *ccv; 119 pcitag_t bustag; 120 int buspin, line; 121 pci_intr_handle_t *ihp; 122 { 123 struct cia_config *ccp = ccv; 124 pci_chipset_tag_t pc = &ccp->cc_pc; 125 int device; 126 int kn20aa_irq; 127 128 if (buspin == 0) { 129 /* No IRQ used. */ 130 return 1; 131 } 132 if (buspin > 4) { 133 printf("dec_kn20aa_intr_map: bad interrupt pin %d\n", buspin); 134 return 1; 135 } 136 137 /* 138 * Slot->interrupt translation. Appears to work, though it 139 * may not hold up forever. 140 * 141 * The DEC engineers who did this hardware obviously engaged 142 * in random drug testing. 143 */ 144 alpha_pci_decompose_tag(pc, bustag, NULL, &device, NULL); 145 switch (device) { 146 case 11: 147 case 12: 148 kn20aa_irq = ((device - 11) + 0) * 4; 149 break; 150 151 case 7: 152 kn20aa_irq = 8; 153 break; 154 155 case 9: 156 kn20aa_irq = 12; 157 break; 158 159 case 6: /* 21040 on AlphaStation 500 */ 160 kn20aa_irq = 13; 161 break; 162 163 case 8: 164 kn20aa_irq = 16; 165 break; 166 167 default: 168 printf("dec_kn20aa_intr_map: weird device number %d\n", 169 device); 170 return 1; 171 } 172 173 kn20aa_irq += buspin - 1; 174 if (kn20aa_irq > KN20AA_MAX_IRQ) 175 panic("dec_kn20aa_intr_map: kn20aa_irq too large (%d)\n", 176 kn20aa_irq); 177 178 *ihp = kn20aa_irq; 179 return (0); 180 } 181 182 const char * 183 dec_kn20aa_intr_string(ccv, ih) 184 void *ccv; 185 pci_intr_handle_t ih; 186 { 187 #if 0 188 struct cia_config *ccp = ccv; 189 #endif 190 static char irqstr[15]; /* 11 + 2 + NULL + sanity */ 191 192 if (ih > KN20AA_MAX_IRQ) 193 panic("dec_kn20aa_intr_string: bogus kn20aa IRQ 0x%x\n", 194 ih); 195 196 sprintf(irqstr, "kn20aa irq %ld", ih); 197 return (irqstr); 198 } 199 200 void * 201 dec_kn20aa_intr_establish(ccv, ih, level, func, arg) 202 void *ccv, *arg; 203 pci_intr_handle_t ih; 204 int level; 205 int (*func) __P((void *)); 206 { 207 #if 0 208 struct cia_config *ccp = ccv; 209 #endif 210 void *cookie; 211 212 if (ih > KN20AA_MAX_IRQ) 213 panic("dec_kn20aa_intr_establish: bogus kn20aa IRQ 0x%x\n", 214 ih); 215 216 cookie = alpha_shared_intr_establish(kn20aa_pci_intr, ih, IST_LEVEL, 217 level, func, arg, "kn20aa irq"); 218 219 if (cookie != NULL && 220 alpha_shared_intr_isactive(kn20aa_pci_intr, ih)) 221 kn20aa_enable_intr(ih); 222 return (cookie); 223 } 224 225 void 226 dec_kn20aa_intr_disestablish(ccv, cookie) 227 void *ccv, *cookie; 228 { 229 #if 0 230 struct cia_config *ccp = ccv; 231 #endif 232 struct alpha_shared_intrhand *ih = cookie; 233 unsigned int irq = ih->ih_num; 234 int s; 235 236 s = splhigh(); 237 238 alpha_shared_intr_disestablish(kn20aa_pci_intr, cookie, 239 "kn20aa irq"); 240 if (alpha_shared_intr_isactive(kn20aa_pci_intr, irq) == 0) { 241 kn20aa_disable_intr(irq); 242 alpha_shared_intr_set_dfltsharetype(kn20aa_pci_intr, irq, 243 IST_NONE); 244 } 245 246 splx(s); 247 } 248 249 void 250 kn20aa_iointr(framep, vec) 251 void *framep; 252 unsigned long vec; 253 { 254 int irq; 255 256 if (vec >= 0x900) { 257 if (vec >= 0x900 + (KN20AA_MAX_IRQ << 4)) 258 panic("kn20aa_iointr: vec 0x%x out of range\n", vec); 259 irq = (vec - 0x900) >> 4; 260 261 #ifdef EVCNT_COUNTERS 262 kn20aa_intr_evcnt.ev_count++; 263 #else 264 if (KN20AA_MAX_IRQ != INTRCNT_KN20AA_IRQ_LEN) 265 panic("kn20aa interrupt counter sizes inconsistent"); 266 intrcnt[INTRCNT_KN20AA_IRQ + irq]++; 267 #endif 268 269 if (!alpha_shared_intr_dispatch(kn20aa_pci_intr, irq)) { 270 alpha_shared_intr_stray(kn20aa_pci_intr, irq, 271 "kn20aa irq"); 272 if (ALPHA_SHARED_INTR_DISABLE(kn20aa_pci_intr, irq)) 273 kn20aa_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("kn20aa_iointr: weird vec 0x%x\n", vec); 284 } 285 286 void 287 kn20aa_enable_intr(irq) 288 int irq; 289 { 290 291 /* 292 * From disassembling small bits of the OSF/1 kernel: 293 * the following appears to enable a given interrupt request. 294 * "blech." I'd give valuable body parts for better docs or 295 * for a good decompiler. 296 */ 297 alpha_mb(); 298 REGVAL(0x8780000000L + 0x40L) |= (1 << irq); /* XXX */ 299 alpha_mb(); 300 } 301 302 void 303 kn20aa_disable_intr(irq) 304 int irq; 305 { 306 307 alpha_mb(); 308 REGVAL(0x8780000000L + 0x40L) &= ~(1 << irq); /* XXX */ 309 alpha_mb(); 310 } 311
Indexes created Tue Sep 30 17:09:57 GMT 2025