pci_kn20aa.c revision 1.22
1 /* $NetBSD: pci_kn20aa.c,v 1.22 1997/04/07 02:01:25 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 <machine/options.h> /* Pull in config options headers */ 31 32 #include <sys/types.h> 33 #include <sys/param.h> 34 #include <sys/time.h> 35 #include <sys/systm.h> 36 #include <sys/errno.h> 37 #include <sys/malloc.h> 38 #include <sys/device.h> 39 #include <sys/syslog.h> 40 41 #include <vm/vm.h> 42 43 #include <machine/autoconf.h> 44 45 #include <dev/pci/pcireg.h> 46 #include <dev/pci/pcivar.h> 47 48 #include <alpha/pci/ciareg.h> 49 #include <alpha/pci/ciavar.h> 50 51 #include <alpha/pci/pci_kn20aa.h> 52 53 #ifndef EVCNT_COUNTERS 54 #include <machine/intrcnt.h> 55 #endif 56 57 #include "sio.h" 58 #if NSIO 59 #include <alpha/pci/siovar.h> 60 #endif 61 62 int dec_kn20aa_intr_map __P((void *, pcitag_t, int, int, 63 pci_intr_handle_t *)); 64 const char *dec_kn20aa_intr_string __P((void *, pci_intr_handle_t)); 65 void *dec_kn20aa_intr_establish __P((void *, pci_intr_handle_t, 66 int, int (*func)(void *), void *)); 67 void dec_kn20aa_intr_disestablish __P((void *, void *)); 68 69 #define KN20AA_PCEB_IRQ 31 70 #define KN20AA_MAX_IRQ 32 71 #define PCI_STRAY_MAX 5 72 73 struct alpha_shared_intr *kn20aa_pci_intr; 74 #ifdef EVCNT_COUNTERS 75 struct evcnt kn20aa_intr_evcnt; 76 #endif 77 78 void kn20aa_iointr __P((void *framep, unsigned long vec)); 79 void kn20aa_enable_intr __P((int irq)); 80 void kn20aa_disable_intr __P((int irq)); 81 82 void 83 pci_kn20aa_pickintr(ccp) 84 struct cia_config *ccp; 85 { 86 int i; 87 bus_space_tag_t iot = ccp->cc_iot; 88 pci_chipset_tag_t pc = &ccp->cc_pc; 89 90 pc->pc_intr_v = ccp; 91 pc->pc_intr_map = dec_kn20aa_intr_map; 92 pc->pc_intr_string = dec_kn20aa_intr_string; 93 pc->pc_intr_establish = dec_kn20aa_intr_establish; 94 pc->pc_intr_disestablish = dec_kn20aa_intr_disestablish; 95 96 kn20aa_pci_intr = alpha_shared_intr_alloc(KN20AA_MAX_IRQ); 97 for (i = 0; i < KN20AA_MAX_IRQ; i++) 98 alpha_shared_intr_set_maxstrays(kn20aa_pci_intr, i, 99 PCI_STRAY_MAX); 100 101 #if NSIO 102 sio_intr_setup(iot); 103 kn20aa_enable_intr(KN20AA_PCEB_IRQ); 104 #endif 105 106 set_iointr(kn20aa_iointr); 107 } 108 109 int 110 dec_kn20aa_intr_map(ccv, bustag, buspin, line, ihp) 111 void *ccv; 112 pcitag_t bustag; 113 int buspin, line; 114 pci_intr_handle_t *ihp; 115 { 116 struct cia_config *ccp = ccv; 117 pci_chipset_tag_t pc = &ccp->cc_pc; 118 int device; 119 int kn20aa_irq; 120 121 if (buspin == 0) { 122 /* No IRQ used. */ 123 return 1; 124 } 125 if (buspin > 4) { 126 printf("pci_map_int: bad interrupt pin %d\n", buspin); 127 return 1; 128 } 129 130 /* 131 * Slot->interrupt translation. Appears to work, though it 132 * may not hold up forever. 133 * 134 * The DEC engineers who did this hardware obviously engaged 135 * in random drug testing. 136 */ 137 pci_decompose_tag(pc, bustag, NULL, &device, NULL); 138 switch (device) { 139 case 11: 140 case 12: 141 kn20aa_irq = ((device - 11) + 0) * 4; 142 break; 143 144 case 7: 145 kn20aa_irq = 8; 146 break; 147 148 case 9: 149 kn20aa_irq = 12; 150 break; 151 152 case 6: /* 21040 on AlphaStation 500 */ 153 kn20aa_irq = 13; 154 break; 155 156 case 8: 157 kn20aa_irq = 16; 158 break; 159 160 default: 161 printf("dec_kn20aa_intr_map: weird device number %d\n", 162 device); 163 return 1; 164 } 165 166 kn20aa_irq += buspin - 1; 167 if (kn20aa_irq > KN20AA_MAX_IRQ) 168 panic("pci_kn20aa_map_int: kn20aa_irq too large (%d)\n", 169 kn20aa_irq); 170 171 *ihp = kn20aa_irq; 172 return (0); 173 } 174 175 const char * 176 dec_kn20aa_intr_string(ccv, ih) 177 void *ccv; 178 pci_intr_handle_t ih; 179 { 180 #if 0 181 struct cia_config *ccp = ccv; 182 #endif 183 static char irqstr[15]; /* 11 + 2 + NULL + sanity */ 184 185 if (ih > KN20AA_MAX_IRQ) 186 panic("dec_kn20aa_intr_string: bogus kn20aa IRQ 0x%x\n", 187 ih); 188 189 sprintf(irqstr, "kn20aa irq %ld", ih); 190 return (irqstr); 191 } 192 193 void * 194 dec_kn20aa_intr_establish(ccv, ih, level, func, arg) 195 void *ccv, *arg; 196 pci_intr_handle_t ih; 197 int level; 198 int (*func) __P((void *)); 199 { 200 #if 0 201 struct cia_config *ccp = ccv; 202 #endif 203 void *cookie; 204 205 if (ih > KN20AA_MAX_IRQ) 206 panic("dec_kn20aa_intr_establish: bogus kn20aa IRQ 0x%x\n", 207 ih); 208 209 cookie = alpha_shared_intr_establish(kn20aa_pci_intr, ih, IST_LEVEL, 210 level, func, arg, "kn20aa irq"); 211 212 if (cookie != NULL && 213 alpha_shared_intr_isactive(kn20aa_pci_intr, ih)) 214 kn20aa_enable_intr(ih); 215 return (cookie); 216 } 217 218 void 219 dec_kn20aa_intr_disestablish(ccv, cookie) 220 void *ccv, *cookie; 221 { 222 #if 0 223 struct cia_config *ccp = ccv; 224 #endif 225 226 panic("dec_kn20aa_intr_disestablish not implemented"); /* XXX */ 227 } 228 229 void 230 kn20aa_iointr(framep, vec) 231 void *framep; 232 unsigned long vec; 233 { 234 int irq; 235 236 if (vec >= 0x900) { 237 if (vec >= 0x900 + (KN20AA_MAX_IRQ << 4)) 238 panic("kn20aa_iointr: vec 0x%x out of range\n", vec); 239 irq = (vec - 0x900) >> 4; 240 241 #ifdef EVCNT_COUNTERS 242 kn20aa_intr_evcnt.ev_count++; 243 #else 244 if (KN20AA_MAX_IRQ != INTRCNT_KN20AA_IRQ_LEN) 245 panic("kn20aa interrupt counter sizes inconsistent"); 246 intrcnt[INTRCNT_KN20AA_IRQ + irq]++; 247 #endif 248 249 if (!alpha_shared_intr_dispatch(kn20aa_pci_intr, irq)) { 250 alpha_shared_intr_stray(kn20aa_pci_intr, irq, 251 "kn20aa irq"); 252 if (kn20aa_pci_intr[irq].intr_nstrays == 253 kn20aa_pci_intr[irq].intr_maxstrays) 254 kn20aa_disable_intr(irq); 255 } 256 return; 257 } 258 #if NSIO 259 if (vec >= 0x800) { 260 sio_iointr(framep, vec); 261 return; 262 } 263 #endif 264 panic("kn20aa_iointr: weird vec 0x%x\n", vec); 265 } 266 267 void 268 kn20aa_enable_intr(irq) 269 int irq; 270 { 271 272 /* 273 * From disassembling small bits of the OSF/1 kernel: 274 * the following appears to enable a given interrupt request. 275 * "blech." I'd give valuable body parts for better docs or 276 * for a good decompiler. 277 */ 278 alpha_mb(); 279 REGVAL(0x8780000000L + 0x40L) |= (1 << irq); /* XXX */ 280 alpha_mb(); 281 } 282 283 void 284 kn20aa_disable_intr(irq) 285 int irq; 286 { 287 288 alpha_mb(); 289 REGVAL(0x8780000000L + 0x40L) &= ~(1 << irq); /* XXX */ 290 alpha_mb(); 291 } 292
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