pci_kn20aa.c revision 1.21
1 /* $NetBSD: pci_kn20aa.c,v 1.21 1996/11/17 02:05:27 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_kn20aa.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_kn20aa_intr_map __P((void *, pcitag_t, int, int, 61 pci_intr_handle_t *)); 62 const char *dec_kn20aa_intr_string __P((void *, pci_intr_handle_t)); 63 void *dec_kn20aa_intr_establish __P((void *, pci_intr_handle_t, 64 int, int (*func)(void *), void *)); 65 void dec_kn20aa_intr_disestablish __P((void *, void *)); 66 67 #define KN20AA_PCEB_IRQ 31 68 #define KN20AA_MAX_IRQ 32 69 #define PCI_STRAY_MAX 5 70 71 struct alpha_shared_intr *kn20aa_pci_intr; 72 #ifdef EVCNT_COUNTERS 73 struct evcnt kn20aa_intr_evcnt; 74 #endif 75 76 void kn20aa_iointr __P((void *framep, unsigned long vec)); 77 void kn20aa_enable_intr __P((int irq)); 78 void kn20aa_disable_intr __P((int irq)); 79 80 void 81 pci_kn20aa_pickintr(ccp) 82 struct cia_config *ccp; 83 { 84 int i; 85 bus_space_tag_t iot = ccp->cc_iot; 86 pci_chipset_tag_t pc = &ccp->cc_pc; 87 88 pc->pc_intr_v = ccp; 89 pc->pc_intr_map = dec_kn20aa_intr_map; 90 pc->pc_intr_string = dec_kn20aa_intr_string; 91 pc->pc_intr_establish = dec_kn20aa_intr_establish; 92 pc->pc_intr_disestablish = dec_kn20aa_intr_disestablish; 93 94 kn20aa_pci_intr = alpha_shared_intr_alloc(KN20AA_MAX_IRQ); 95 for (i = 0; i < KN20AA_MAX_IRQ; i++) 96 alpha_shared_intr_set_maxstrays(kn20aa_pci_intr, i, 97 PCI_STRAY_MAX); 98 99 #if NSIO 100 sio_intr_setup(iot); 101 kn20aa_enable_intr(KN20AA_PCEB_IRQ); 102 #endif 103 104 set_iointr(kn20aa_iointr); 105 } 106 107 int 108 dec_kn20aa_intr_map(ccv, bustag, buspin, line, ihp) 109 void *ccv; 110 pcitag_t bustag; 111 int buspin, line; 112 pci_intr_handle_t *ihp; 113 { 114 struct cia_config *ccp = ccv; 115 pci_chipset_tag_t pc = &ccp->cc_pc; 116 int device; 117 int kn20aa_irq; 118 119 if (buspin == 0) { 120 /* No IRQ used. */ 121 return 1; 122 } 123 if (buspin > 4) { 124 printf("pci_map_int: bad interrupt pin %d\n", buspin); 125 return 1; 126 } 127 128 /* 129 * Slot->interrupt translation. Appears to work, though it 130 * may not hold up forever. 131 * 132 * The DEC engineers who did this hardware obviously engaged 133 * in random drug testing. 134 */ 135 pci_decompose_tag(pc, bustag, NULL, &device, NULL); 136 switch (device) { 137 case 11: 138 case 12: 139 kn20aa_irq = ((device - 11) + 0) * 4; 140 break; 141 142 case 7: 143 kn20aa_irq = 8; 144 break; 145 146 case 9: 147 kn20aa_irq = 12; 148 break; 149 150 case 6: /* 21040 on AlphaStation 500 */ 151 kn20aa_irq = 13; 152 break; 153 154 case 8: 155 kn20aa_irq = 16; 156 break; 157 158 default: 159 printf("dec_kn20aa_intr_map: weird device number %d\n", 160 device); 161 return 1; 162 } 163 164 kn20aa_irq += buspin - 1; 165 if (kn20aa_irq > KN20AA_MAX_IRQ) 166 panic("pci_kn20aa_map_int: kn20aa_irq too large (%d)\n", 167 kn20aa_irq); 168 169 *ihp = kn20aa_irq; 170 return (0); 171 } 172 173 const char * 174 dec_kn20aa_intr_string(ccv, ih) 175 void *ccv; 176 pci_intr_handle_t ih; 177 { 178 #if 0 179 struct cia_config *ccp = ccv; 180 #endif 181 static char irqstr[15]; /* 11 + 2 + NULL + sanity */ 182 183 if (ih > KN20AA_MAX_IRQ) 184 panic("dec_kn20aa_intr_string: bogus kn20aa IRQ 0x%x\n", 185 ih); 186 187 sprintf(irqstr, "kn20aa irq %ld", ih); 188 return (irqstr); 189 } 190 191 void * 192 dec_kn20aa_intr_establish(ccv, ih, level, func, arg) 193 void *ccv, *arg; 194 pci_intr_handle_t ih; 195 int level; 196 int (*func) __P((void *)); 197 { 198 #if 0 199 struct cia_config *ccp = ccv; 200 #endif 201 void *cookie; 202 203 if (ih > KN20AA_MAX_IRQ) 204 panic("dec_kn20aa_intr_establish: bogus kn20aa IRQ 0x%x\n", 205 ih); 206 207 cookie = alpha_shared_intr_establish(kn20aa_pci_intr, ih, IST_LEVEL, 208 level, func, arg, "kn20aa irq"); 209 210 if (cookie != NULL && 211 alpha_shared_intr_isactive(kn20aa_pci_intr, ih)) 212 kn20aa_enable_intr(ih); 213 return (cookie); 214 } 215 216 void 217 dec_kn20aa_intr_disestablish(ccv, cookie) 218 void *ccv, *cookie; 219 { 220 #if 0 221 struct cia_config *ccp = ccv; 222 #endif 223 224 panic("dec_kn20aa_intr_disestablish not implemented"); /* XXX */ 225 } 226 227 void 228 kn20aa_iointr(framep, vec) 229 void *framep; 230 unsigned long vec; 231 { 232 int irq; 233 234 if (vec >= 0x900) { 235 if (vec >= 0x900 + (KN20AA_MAX_IRQ << 4)) 236 panic("kn20aa_iointr: vec 0x%x out of range\n", vec); 237 irq = (vec - 0x900) >> 4; 238 239 #ifdef EVCNT_COUNTERS 240 kn20aa_intr_evcnt.ev_count++; 241 #else 242 if (KN20AA_MAX_IRQ != INTRCNT_KN20AA_IRQ_LEN) 243 panic("kn20aa interrupt counter sizes inconsistent"); 244 intrcnt[INTRCNT_KN20AA_IRQ + irq]++; 245 #endif 246 247 if (!alpha_shared_intr_dispatch(kn20aa_pci_intr, irq)) { 248 alpha_shared_intr_stray(kn20aa_pci_intr, irq, 249 "kn20aa irq"); 250 if (kn20aa_pci_intr[irq].intr_nstrays == 251 kn20aa_pci_intr[irq].intr_maxstrays) 252 kn20aa_disable_intr(irq); 253 } 254 return; 255 } 256 #if NSIO 257 if (vec >= 0x800) { 258 sio_iointr(framep, vec); 259 return; 260 } 261 #endif 262 panic("kn20aa_iointr: weird vec 0x%x\n", vec); 263 } 264 265 void 266 kn20aa_enable_intr(irq) 267 int irq; 268 { 269 270 /* 271 * From disassembling small bits of the OSF/1 kernel: 272 * the following appears to enable a given interrupt request. 273 * "blech." I'd give valuable body parts for better docs or 274 * for a good decompiler. 275 */ 276 alpha_mb(); 277 REGVAL(0x8780000000L + 0x40L) |= (1 << irq); /* XXX */ 278 alpha_mb(); 279 } 280 281 void 282 kn20aa_disable_intr(irq) 283 int irq; 284 { 285 286 alpha_mb(); 287 REGVAL(0x8780000000L + 0x40L) &= ~(1 << irq); /* XXX */ 288 alpha_mb(); 289 } 290
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