pci_kn20aa.c revision 1.29
1 /* $NetBSD: pci_kn20aa.c,v 1.29 1998/04/18 01:12:24 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 1.29 1998/04/18 01:12:24 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 /* Not supoprted on KN20AA. */ 99 pc->pc_pciide_compat_intr_establish = NULL; 100 101 kn20aa_pci_intr = alpha_shared_intr_alloc(KN20AA_MAX_IRQ); 102 for (i = 0; i < KN20AA_MAX_IRQ; i++) 103 alpha_shared_intr_set_maxstrays(kn20aa_pci_intr, i, 104 PCI_STRAY_MAX); 105 106 #if NSIO 107 sio_intr_setup(pc, iot); 108 kn20aa_enable_intr(KN20AA_PCEB_IRQ); 109 #endif 110 111 set_iointr(kn20aa_iointr); 112 } 113 114 int 115 dec_kn20aa_intr_map(ccv, bustag, buspin, line, ihp) 116 void *ccv; 117 pcitag_t bustag; 118 int buspin, line; 119 pci_intr_handle_t *ihp; 120 { 121 struct cia_config *ccp = ccv; 122 pci_chipset_tag_t pc = &ccp->cc_pc; 123 int device; 124 int kn20aa_irq; 125 126 if (buspin == 0) { 127 /* No IRQ used. */ 128 return 1; 129 } 130 if (buspin > 4) { 131 printf("dec_kn20aa_intr_map: bad interrupt pin %d\n", buspin); 132 return 1; 133 } 134 135 /* 136 * Slot->interrupt translation. Appears to work, though it 137 * may not hold up forever. 138 * 139 * The DEC engineers who did this hardware obviously engaged 140 * in random drug testing. 141 */ 142 alpha_pci_decompose_tag(pc, bustag, NULL, &device, NULL); 143 switch (device) { 144 case 11: 145 case 12: 146 kn20aa_irq = ((device - 11) + 0) * 4; 147 break; 148 149 case 7: 150 kn20aa_irq = 8; 151 break; 152 153 case 9: 154 kn20aa_irq = 12; 155 break; 156 157 case 6: /* 21040 on AlphaStation 500 */ 158 kn20aa_irq = 13; 159 break; 160 161 case 8: 162 kn20aa_irq = 16; 163 break; 164 165 default: 166 printf("dec_kn20aa_intr_map: weird device number %d\n", 167 device); 168 return 1; 169 } 170 171 kn20aa_irq += buspin - 1; 172 if (kn20aa_irq > KN20AA_MAX_IRQ) 173 panic("dec_kn20aa_intr_map: kn20aa_irq too large (%d)\n", 174 kn20aa_irq); 175 176 *ihp = kn20aa_irq; 177 return (0); 178 } 179 180 const char * 181 dec_kn20aa_intr_string(ccv, ih) 182 void *ccv; 183 pci_intr_handle_t ih; 184 { 185 #if 0 186 struct cia_config *ccp = ccv; 187 #endif 188 static char irqstr[15]; /* 11 + 2 + NULL + sanity */ 189 190 if (ih > KN20AA_MAX_IRQ) 191 panic("dec_kn20aa_intr_string: bogus kn20aa IRQ 0x%x\n", 192 ih); 193 194 sprintf(irqstr, "kn20aa irq %ld", ih); 195 return (irqstr); 196 } 197 198 void * 199 dec_kn20aa_intr_establish(ccv, ih, level, func, arg) 200 void *ccv, *arg; 201 pci_intr_handle_t ih; 202 int level; 203 int (*func) __P((void *)); 204 { 205 #if 0 206 struct cia_config *ccp = ccv; 207 #endif 208 void *cookie; 209 210 if (ih > KN20AA_MAX_IRQ) 211 panic("dec_kn20aa_intr_establish: bogus kn20aa IRQ 0x%x\n", 212 ih); 213 214 cookie = alpha_shared_intr_establish(kn20aa_pci_intr, ih, IST_LEVEL, 215 level, func, arg, "kn20aa irq"); 216 217 if (cookie != NULL && 218 alpha_shared_intr_isactive(kn20aa_pci_intr, ih)) 219 kn20aa_enable_intr(ih); 220 return (cookie); 221 } 222 223 void 224 dec_kn20aa_intr_disestablish(ccv, cookie) 225 void *ccv, *cookie; 226 { 227 #if 0 228 struct cia_config *ccp = ccv; 229 #endif 230 231 panic("dec_kn20aa_intr_disestablish not implemented"); /* XXX */ 232 } 233 234 void 235 kn20aa_iointr(framep, vec) 236 void *framep; 237 unsigned long vec; 238 { 239 int irq; 240 241 if (vec >= 0x900) { 242 if (vec >= 0x900 + (KN20AA_MAX_IRQ << 4)) 243 panic("kn20aa_iointr: vec 0x%x out of range\n", vec); 244 irq = (vec - 0x900) >> 4; 245 246 #ifdef EVCNT_COUNTERS 247 kn20aa_intr_evcnt.ev_count++; 248 #else 249 if (KN20AA_MAX_IRQ != INTRCNT_KN20AA_IRQ_LEN) 250 panic("kn20aa interrupt counter sizes inconsistent"); 251 intrcnt[INTRCNT_KN20AA_IRQ + irq]++; 252 #endif 253 254 if (!alpha_shared_intr_dispatch(kn20aa_pci_intr, irq)) { 255 alpha_shared_intr_stray(kn20aa_pci_intr, irq, 256 "kn20aa irq"); 257 if (kn20aa_pci_intr[irq].intr_nstrays == 258 kn20aa_pci_intr[irq].intr_maxstrays) 259 kn20aa_disable_intr(irq); 260 } 261 return; 262 } 263 #if NSIO 264 if (vec >= 0x800) { 265 sio_iointr(framep, vec); 266 return; 267 } 268 #endif 269 panic("kn20aa_iointr: weird vec 0x%x\n", vec); 270 } 271 272 void 273 kn20aa_enable_intr(irq) 274 int irq; 275 { 276 277 /* 278 * From disassembling small bits of the OSF/1 kernel: 279 * the following appears to enable a given interrupt request. 280 * "blech." I'd give valuable body parts for better docs or 281 * for a good decompiler. 282 */ 283 alpha_mb(); 284 REGVAL(0x8780000000L + 0x40L) |= (1 << irq); /* XXX */ 285 alpha_mb(); 286 } 287 288 void 289 kn20aa_disable_intr(irq) 290 int irq; 291 { 292 293 alpha_mb(); 294 REGVAL(0x8780000000L + 0x40L) &= ~(1 << irq); /* XXX */ 295 alpha_mb(); 296 } 297
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