pci_kn20aa.c revision 1.26
1 /* $NetBSD: pci_kn20aa.c,v 1.26 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_kn20aa.c,v 1.26 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_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 bus_space_tag_t iot = &ccp->cc_iot; 90 pci_chipset_tag_t pc = &ccp->cc_pc; 91 92 pc->pc_intr_v = ccp; 93 pc->pc_intr_map = dec_kn20aa_intr_map; 94 pc->pc_intr_string = dec_kn20aa_intr_string; 95 pc->pc_intr_establish = dec_kn20aa_intr_establish; 96 pc->pc_intr_disestablish = dec_kn20aa_intr_disestablish; 97 98 kn20aa_pci_intr = alpha_shared_intr_alloc(KN20AA_MAX_IRQ); 99 for (i = 0; i < KN20AA_MAX_IRQ; i++) 100 alpha_shared_intr_set_maxstrays(kn20aa_pci_intr, i, 101 PCI_STRAY_MAX); 102 103 #if NSIO 104 sio_intr_setup(iot); 105 kn20aa_enable_intr(KN20AA_PCEB_IRQ); 106 #endif 107 108 set_iointr(kn20aa_iointr); 109 } 110 111 int 112 dec_kn20aa_intr_map(ccv, bustag, buspin, line, ihp) 113 void *ccv; 114 pcitag_t bustag; 115 int buspin, line; 116 pci_intr_handle_t *ihp; 117 { 118 struct cia_config *ccp = ccv; 119 pci_chipset_tag_t pc = &ccp->cc_pc; 120 int device; 121 int kn20aa_irq; 122 123 if (buspin == 0) { 124 /* No IRQ used. */ 125 return 1; 126 } 127 if (buspin > 4) { 128 printf("pci_map_int: bad interrupt pin %d\n", buspin); 129 return 1; 130 } 131 132 /* 133 * Slot->interrupt translation. Appears to work, though it 134 * may not hold up forever. 135 * 136 * The DEC engineers who did this hardware obviously engaged 137 * in random drug testing. 138 */ 139 alpha_pci_decompose_tag(pc, bustag, NULL, &device, NULL); 140 switch (device) { 141 case 11: 142 case 12: 143 kn20aa_irq = ((device - 11) + 0) * 4; 144 break; 145 146 case 7: 147 kn20aa_irq = 8; 148 break; 149 150 case 9: 151 kn20aa_irq = 12; 152 break; 153 154 case 6: /* 21040 on AlphaStation 500 */ 155 kn20aa_irq = 13; 156 break; 157 158 case 8: 159 kn20aa_irq = 16; 160 break; 161 162 default: 163 printf("dec_kn20aa_intr_map: weird device number %d\n", 164 device); 165 return 1; 166 } 167 168 kn20aa_irq += buspin - 1; 169 if (kn20aa_irq > KN20AA_MAX_IRQ) 170 panic("pci_kn20aa_map_int: kn20aa_irq too large (%d)\n", 171 kn20aa_irq); 172 173 *ihp = kn20aa_irq; 174 return (0); 175 } 176 177 const char * 178 dec_kn20aa_intr_string(ccv, ih) 179 void *ccv; 180 pci_intr_handle_t ih; 181 { 182 #if 0 183 struct cia_config *ccp = ccv; 184 #endif 185 static char irqstr[15]; /* 11 + 2 + NULL + sanity */ 186 187 if (ih > KN20AA_MAX_IRQ) 188 panic("dec_kn20aa_intr_string: bogus kn20aa IRQ 0x%x\n", 189 ih); 190 191 sprintf(irqstr, "kn20aa irq %ld", ih); 192 return (irqstr); 193 } 194 195 void * 196 dec_kn20aa_intr_establish(ccv, ih, level, func, arg) 197 void *ccv, *arg; 198 pci_intr_handle_t ih; 199 int level; 200 int (*func) __P((void *)); 201 { 202 #if 0 203 struct cia_config *ccp = ccv; 204 #endif 205 void *cookie; 206 207 if (ih > KN20AA_MAX_IRQ) 208 panic("dec_kn20aa_intr_establish: bogus kn20aa IRQ 0x%x\n", 209 ih); 210 211 cookie = alpha_shared_intr_establish(kn20aa_pci_intr, ih, IST_LEVEL, 212 level, func, arg, "kn20aa irq"); 213 214 if (cookie != NULL && 215 alpha_shared_intr_isactive(kn20aa_pci_intr, ih)) 216 kn20aa_enable_intr(ih); 217 return (cookie); 218 } 219 220 void 221 dec_kn20aa_intr_disestablish(ccv, cookie) 222 void *ccv, *cookie; 223 { 224 #if 0 225 struct cia_config *ccp = ccv; 226 #endif 227 228 panic("dec_kn20aa_intr_disestablish not implemented"); /* XXX */ 229 } 230 231 void 232 kn20aa_iointr(framep, vec) 233 void *framep; 234 unsigned long vec; 235 { 236 int irq; 237 238 if (vec >= 0x900) { 239 if (vec >= 0x900 + (KN20AA_MAX_IRQ << 4)) 240 panic("kn20aa_iointr: vec 0x%x out of range\n", vec); 241 irq = (vec - 0x900) >> 4; 242 243 #ifdef EVCNT_COUNTERS 244 kn20aa_intr_evcnt.ev_count++; 245 #else 246 if (KN20AA_MAX_IRQ != INTRCNT_KN20AA_IRQ_LEN) 247 panic("kn20aa interrupt counter sizes inconsistent"); 248 intrcnt[INTRCNT_KN20AA_IRQ + irq]++; 249 #endif 250 251 if (!alpha_shared_intr_dispatch(kn20aa_pci_intr, irq)) { 252 alpha_shared_intr_stray(kn20aa_pci_intr, irq, 253 "kn20aa irq"); 254 if (kn20aa_pci_intr[irq].intr_nstrays == 255 kn20aa_pci_intr[irq].intr_maxstrays) 256 kn20aa_disable_intr(irq); 257 } 258 return; 259 } 260 #if NSIO 261 if (vec >= 0x800) { 262 sio_iointr(framep, vec); 263 return; 264 } 265 #endif 266 panic("kn20aa_iointr: weird vec 0x%x\n", vec); 267 } 268 269 void 270 kn20aa_enable_intr(irq) 271 int irq; 272 { 273 274 /* 275 * From disassembling small bits of the OSF/1 kernel: 276 * the following appears to enable a given interrupt request. 277 * "blech." I'd give valuable body parts for better docs or 278 * for a good decompiler. 279 */ 280 alpha_mb(); 281 REGVAL(0x8780000000L + 0x40L) |= (1 << irq); /* XXX */ 282 alpha_mb(); 283 } 284 285 void 286 kn20aa_disable_intr(irq) 287 int irq; 288 { 289 290 alpha_mb(); 291 REGVAL(0x8780000000L + 0x40L) &= ~(1 << irq); /* XXX */ 292 alpha_mb(); 293 } 294
Indexes created Tue Sep 30 11:09:46 GMT 2025