pci_kn20aa.c revision 1.23
1 /* $NetBSD: pci_kn20aa.c,v 1.23 1997/04/07 23:40:43 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> /* Config options headers */ 31 #include <sys/cdefs.h> /* RCS ID & Copyright macro defns */ 32 33 __KERNEL_RCSID(0, "$NetBSD: pci_kn20aa.c,v 1.23 1997/04/07 23:40:43 cgd Exp $"); 34 35 #include <sys/types.h> 36 #include <sys/param.h> 37 #include <sys/time.h> 38 #include <sys/systm.h> 39 #include <sys/errno.h> 40 #include <sys/malloc.h> 41 #include <sys/device.h> 42 #include <sys/syslog.h> 43 44 #include <vm/vm.h> 45 46 #include <machine/autoconf.h> 47 48 #include <dev/pci/pcireg.h> 49 #include <dev/pci/pcivar.h> 50 51 #include <alpha/pci/ciareg.h> 52 #include <alpha/pci/ciavar.h> 53 54 #include <alpha/pci/pci_kn20aa.h> 55 56 #ifndef EVCNT_COUNTERS 57 #include <machine/intrcnt.h> 58 #endif 59 60 #include "sio.h" 61 #if NSIO 62 #include <alpha/pci/siovar.h> 63 #endif 64 65 int dec_kn20aa_intr_map __P((void *, pcitag_t, int, int, 66 pci_intr_handle_t *)); 67 const char *dec_kn20aa_intr_string __P((void *, pci_intr_handle_t)); 68 void *dec_kn20aa_intr_establish __P((void *, pci_intr_handle_t, 69 int, int (*func)(void *), void *)); 70 void dec_kn20aa_intr_disestablish __P((void *, void *)); 71 72 #define KN20AA_PCEB_IRQ 31 73 #define KN20AA_MAX_IRQ 32 74 #define PCI_STRAY_MAX 5 75 76 struct alpha_shared_intr *kn20aa_pci_intr; 77 #ifdef EVCNT_COUNTERS 78 struct evcnt kn20aa_intr_evcnt; 79 #endif 80 81 void kn20aa_iointr __P((void *framep, unsigned long vec)); 82 void kn20aa_enable_intr __P((int irq)); 83 void kn20aa_disable_intr __P((int irq)); 84 85 void 86 pci_kn20aa_pickintr(ccp) 87 struct cia_config *ccp; 88 { 89 int i; 90 bus_space_tag_t iot = ccp->cc_iot; 91 pci_chipset_tag_t pc = &ccp->cc_pc; 92 93 pc->pc_intr_v = ccp; 94 pc->pc_intr_map = dec_kn20aa_intr_map; 95 pc->pc_intr_string = dec_kn20aa_intr_string; 96 pc->pc_intr_establish = dec_kn20aa_intr_establish; 97 pc->pc_intr_disestablish = dec_kn20aa_intr_disestablish; 98 99 kn20aa_pci_intr = alpha_shared_intr_alloc(KN20AA_MAX_IRQ); 100 for (i = 0; i < KN20AA_MAX_IRQ; i++) 101 alpha_shared_intr_set_maxstrays(kn20aa_pci_intr, i, 102 PCI_STRAY_MAX); 103 104 #if NSIO 105 sio_intr_setup(iot); 106 kn20aa_enable_intr(KN20AA_PCEB_IRQ); 107 #endif 108 109 set_iointr(kn20aa_iointr); 110 } 111 112 int 113 dec_kn20aa_intr_map(ccv, bustag, buspin, line, ihp) 114 void *ccv; 115 pcitag_t bustag; 116 int buspin, line; 117 pci_intr_handle_t *ihp; 118 { 119 struct cia_config *ccp = ccv; 120 pci_chipset_tag_t pc = &ccp->cc_pc; 121 int device; 122 int kn20aa_irq; 123 124 if (buspin == 0) { 125 /* No IRQ used. */ 126 return 1; 127 } 128 if (buspin > 4) { 129 printf("pci_map_int: bad interrupt pin %d\n", buspin); 130 return 1; 131 } 132 133 /* 134 * Slot->interrupt translation. Appears to work, though it 135 * may not hold up forever. 136 * 137 * The DEC engineers who did this hardware obviously engaged 138 * in random drug testing. 139 */ 140 pci_decompose_tag(pc, bustag, NULL, &device, NULL); 141 switch (device) { 142 case 11: 143 case 12: 144 kn20aa_irq = ((device - 11) + 0) * 4; 145 break; 146 147 case 7: 148 kn20aa_irq = 8; 149 break; 150 151 case 9: 152 kn20aa_irq = 12; 153 break; 154 155 case 6: /* 21040 on AlphaStation 500 */ 156 kn20aa_irq = 13; 157 break; 158 159 case 8: 160 kn20aa_irq = 16; 161 break; 162 163 default: 164 printf("dec_kn20aa_intr_map: weird device number %d\n", 165 device); 166 return 1; 167 } 168 169 kn20aa_irq += buspin - 1; 170 if (kn20aa_irq > KN20AA_MAX_IRQ) 171 panic("pci_kn20aa_map_int: kn20aa_irq too large (%d)\n", 172 kn20aa_irq); 173 174 *ihp = kn20aa_irq; 175 return (0); 176 } 177 178 const char * 179 dec_kn20aa_intr_string(ccv, ih) 180 void *ccv; 181 pci_intr_handle_t ih; 182 { 183 #if 0 184 struct cia_config *ccp = ccv; 185 #endif 186 static char irqstr[15]; /* 11 + 2 + NULL + sanity */ 187 188 if (ih > KN20AA_MAX_IRQ) 189 panic("dec_kn20aa_intr_string: bogus kn20aa IRQ 0x%x\n", 190 ih); 191 192 sprintf(irqstr, "kn20aa irq %ld", ih); 193 return (irqstr); 194 } 195 196 void * 197 dec_kn20aa_intr_establish(ccv, ih, level, func, arg) 198 void *ccv, *arg; 199 pci_intr_handle_t ih; 200 int level; 201 int (*func) __P((void *)); 202 { 203 #if 0 204 struct cia_config *ccp = ccv; 205 #endif 206 void *cookie; 207 208 if (ih > KN20AA_MAX_IRQ) 209 panic("dec_kn20aa_intr_establish: bogus kn20aa IRQ 0x%x\n", 210 ih); 211 212 cookie = alpha_shared_intr_establish(kn20aa_pci_intr, ih, IST_LEVEL, 213 level, func, arg, "kn20aa irq"); 214 215 if (cookie != NULL && 216 alpha_shared_intr_isactive(kn20aa_pci_intr, ih)) 217 kn20aa_enable_intr(ih); 218 return (cookie); 219 } 220 221 void 222 dec_kn20aa_intr_disestablish(ccv, cookie) 223 void *ccv, *cookie; 224 { 225 #if 0 226 struct cia_config *ccp = ccv; 227 #endif 228 229 panic("dec_kn20aa_intr_disestablish not implemented"); /* XXX */ 230 } 231 232 void 233 kn20aa_iointr(framep, vec) 234 void *framep; 235 unsigned long vec; 236 { 237 int irq; 238 239 if (vec >= 0x900) { 240 if (vec >= 0x900 + (KN20AA_MAX_IRQ << 4)) 241 panic("kn20aa_iointr: vec 0x%x out of range\n", vec); 242 irq = (vec - 0x900) >> 4; 243 244 #ifdef EVCNT_COUNTERS 245 kn20aa_intr_evcnt.ev_count++; 246 #else 247 if (KN20AA_MAX_IRQ != INTRCNT_KN20AA_IRQ_LEN) 248 panic("kn20aa interrupt counter sizes inconsistent"); 249 intrcnt[INTRCNT_KN20AA_IRQ + irq]++; 250 #endif 251 252 if (!alpha_shared_intr_dispatch(kn20aa_pci_intr, irq)) { 253 alpha_shared_intr_stray(kn20aa_pci_intr, irq, 254 "kn20aa irq"); 255 if (kn20aa_pci_intr[irq].intr_nstrays == 256 kn20aa_pci_intr[irq].intr_maxstrays) 257 kn20aa_disable_intr(irq); 258 } 259 return; 260 } 261 #if NSIO 262 if (vec >= 0x800) { 263 sio_iointr(framep, vec); 264 return; 265 } 266 #endif 267 panic("kn20aa_iointr: weird vec 0x%x\n", vec); 268 } 269 270 void 271 kn20aa_enable_intr(irq) 272 int irq; 273 { 274 275 /* 276 * From disassembling small bits of the OSF/1 kernel: 277 * the following appears to enable a given interrupt request. 278 * "blech." I'd give valuable body parts for better docs or 279 * for a good decompiler. 280 */ 281 alpha_mb(); 282 REGVAL(0x8780000000L + 0x40L) |= (1 << irq); /* XXX */ 283 alpha_mb(); 284 } 285 286 void 287 kn20aa_disable_intr(irq) 288 int irq; 289 { 290 291 alpha_mb(); 292 REGVAL(0x8780000000L + 0x40L) &= ~(1 << irq); /* XXX */ 293 alpha_mb(); 294 } 295
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