pci_eb66.c revision 1.15
1 /* $NetBSD: pci_eb66.c,v 1.15 2007/12/03 15:33:08 ad Exp $ */ 2 3 /*- 4 * Copyright (c) 1998 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility, 9 * NASA Ames Research Center. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 3. All advertising materials mentioning features or use of this software 20 * must display the following acknowledgement: 21 * This product includes software developed by the NetBSD 22 * Foundation, Inc. and its contributors. 23 * 4. Neither the name of The NetBSD Foundation nor the names of its 24 * contributors may be used to endorse or promote products derived 25 * from this software without specific prior written permission. 26 * 27 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 28 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 29 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 30 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 31 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 32 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 33 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 34 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 35 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 36 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 37 * POSSIBILITY OF SUCH DAMAGE. 38 */ 39 40 /* 41 * Copyright (c) 1995, 1996 Carnegie-Mellon University. 42 * All rights reserved. 43 * 44 * Author: Chris G. Demetriou 45 * 46 * Permission to use, copy, modify and distribute this software and 47 * its documentation is hereby granted, provided that both the copyright 48 * notice and this permission notice appear in all copies of the 49 * software, derivative works or modified versions, and any portions 50 * thereof, and that both notices appear in supporting documentation. 51 * 52 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" 53 * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND 54 * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. 55 * 56 * Carnegie Mellon requests users of this software to return to 57 * 58 * Software Distribution Coordinator or Software.Distribution (at) CS.CMU.EDU 59 * School of Computer Science 60 * Carnegie Mellon University 61 * Pittsburgh PA 15213-3890 62 * 63 * any improvements or extensions that they make and grant Carnegie the 64 * rights to redistribute these changes. 65 */ 66 67 #include <sys/cdefs.h> /* RCS ID & Copyright macro defns */ 68 69 __KERNEL_RCSID(0, "$NetBSD: pci_eb66.c,v 1.15 2007/12/03 15:33:08 ad Exp $"); 70 71 #include <sys/types.h> 72 #include <sys/param.h> 73 #include <sys/time.h> 74 #include <sys/systm.h> 75 #include <sys/errno.h> 76 #include <sys/malloc.h> 77 #include <sys/device.h> 78 #include <sys/syslog.h> 79 80 #include <uvm/uvm_extern.h> 81 82 #include <machine/autoconf.h> 83 84 #include <dev/pci/pcireg.h> 85 #include <dev/pci/pcivar.h> 86 87 #include <alpha/pci/lcareg.h> 88 #include <alpha/pci/lcavar.h> 89 90 #include <alpha/pci/pci_eb66.h> 91 92 #include "sio.h" 93 #if NSIO 94 #include <alpha/pci/siovar.h> 95 #endif 96 97 int dec_eb66_intr_map __P((struct pci_attach_args *, 98 pci_intr_handle_t *)); 99 const char *dec_eb66_intr_string __P((void *, pci_intr_handle_t)); 100 const struct evcnt *dec_eb66_intr_evcnt __P((void *, pci_intr_handle_t)); 101 void *dec_eb66_intr_establish __P((void *, pci_intr_handle_t, 102 int, int (*func)(void *), void *)); 103 void dec_eb66_intr_disestablish __P((void *, void *)); 104 105 #define EB66_MAX_IRQ 32 106 #define PCI_STRAY_MAX 5 107 108 struct alpha_shared_intr *eb66_pci_intr; 109 110 bus_space_tag_t eb66_intrgate_iot; 111 bus_space_handle_t eb66_intrgate_ioh; 112 113 void eb66_iointr __P((void *arg, unsigned long vec)); 114 extern void eb66_intr_enable __P((int irq)); /* pci_eb66_intr.S */ 115 extern void eb66_intr_disable __P((int irq)); /* pci_eb66_intr.S */ 116 117 void 118 pci_eb66_pickintr(lcp) 119 struct lca_config *lcp; 120 { 121 bus_space_tag_t iot = &lcp->lc_iot; 122 pci_chipset_tag_t pc = &lcp->lc_pc; 123 char *cp; 124 int i; 125 126 pc->pc_intr_v = lcp; 127 pc->pc_intr_map = dec_eb66_intr_map; 128 pc->pc_intr_string = dec_eb66_intr_string; 129 pc->pc_intr_evcnt = dec_eb66_intr_evcnt; 130 pc->pc_intr_establish = dec_eb66_intr_establish; 131 pc->pc_intr_disestablish = dec_eb66_intr_disestablish; 132 133 /* Not supported on the EB66. */ 134 pc->pc_pciide_compat_intr_establish = NULL; 135 136 eb66_intrgate_iot = iot; 137 if (bus_space_map(eb66_intrgate_iot, 0x804, 3, 0, 138 &eb66_intrgate_ioh) != 0) 139 panic("pci_eb66_pickintr: couldn't map interrupt PLD"); 140 for (i = 0; i < EB66_MAX_IRQ; i++) 141 eb66_intr_disable(i); 142 143 eb66_pci_intr = alpha_shared_intr_alloc(EB66_MAX_IRQ, 8); 144 for (i = 0; i < EB66_MAX_IRQ; i++) { 145 alpha_shared_intr_set_maxstrays(eb66_pci_intr, i, 146 PCI_STRAY_MAX); 147 148 cp = alpha_shared_intr_string(eb66_pci_intr, i); 149 sprintf(cp, "irq %d", i); 150 evcnt_attach_dynamic(alpha_shared_intr_evcnt( 151 eb66_pci_intr, i), EVCNT_TYPE_INTR, NULL, 152 "eb66", cp); 153 } 154 155 #if NSIO 156 sio_intr_setup(pc, iot); 157 #endif 158 } 159 160 int 161 dec_eb66_intr_map(pa, ihp) 162 struct pci_attach_args *pa; 163 pci_intr_handle_t *ihp; 164 { 165 pcitag_t bustag = pa->pa_intrtag; 166 int buspin = pa->pa_intrpin, line = pa->pa_intrline; 167 pci_chipset_tag_t pc = pa->pa_pc; 168 int bus, device, function; 169 170 if (buspin == 0) { 171 /* No IRQ used. */ 172 return 1; 173 } 174 if (buspin > 4) { 175 printf("dec_eb66_intr_map: bad interrupt pin %d\n", buspin); 176 return 1; 177 } 178 179 pci_decompose_tag(pc, bustag, &bus, &device, &function); 180 181 /* 182 * The console places the interrupt mapping in the "line" value. 183 * A value of (char)-1 indicates there is no mapping. 184 */ 185 if (line == 0xff) { 186 printf("dec_eb66_intr_map: no mapping for %d/%d/%d\n", 187 bus, device, function); 188 return (1); 189 } 190 191 if (line >= EB66_MAX_IRQ) 192 panic("dec_eb66_intr_map: eb66 irq too large (%d)", 193 line); 194 195 *ihp = line; 196 return (0); 197 } 198 199 const char * 200 dec_eb66_intr_string(lcv, ih) 201 void *lcv; 202 pci_intr_handle_t ih; 203 { 204 static char irqstr[15]; /* 11 + 2 + NULL + sanity */ 205 206 if (ih >= EB66_MAX_IRQ) 207 panic("dec_eb66_intr_string: bogus eb66 IRQ 0x%lx", ih); 208 sprintf(irqstr, "eb66 irq %ld", ih); 209 return (irqstr); 210 } 211 212 const struct evcnt * 213 dec_eb66_intr_evcnt(lcv, ih) 214 void *lcv; 215 pci_intr_handle_t ih; 216 { 217 218 if (ih >= EB66_MAX_IRQ) 219 panic("dec_eb66_intr_string: bogus eb66 IRQ 0x%lx", ih); 220 return (alpha_shared_intr_evcnt(eb66_pci_intr, ih)); 221 } 222 223 void * 224 dec_eb66_intr_establish(lcv, ih, level, func, arg) 225 void *lcv, *arg; 226 pci_intr_handle_t ih; 227 int level; 228 int (*func) __P((void *)); 229 { 230 void *cookie; 231 232 if (ih >= EB66_MAX_IRQ) 233 panic("dec_eb66_intr_establish: bogus eb66 IRQ 0x%lx", ih); 234 235 cookie = alpha_shared_intr_establish(eb66_pci_intr, ih, IST_LEVEL, 236 level, func, arg, "eb66 irq"); 237 238 if (cookie != NULL && 239 alpha_shared_intr_firstactive(eb66_pci_intr, ih)) { 240 scb_set(0x900 + SCB_IDXTOVEC(ih), eb66_iointr, NULL, 241 level); 242 eb66_intr_enable(ih); 243 } 244 return (cookie); 245 } 246 247 void 248 dec_eb66_intr_disestablish(lcv, cookie) 249 void *lcv, *cookie; 250 { 251 struct alpha_shared_intrhand *ih = cookie; 252 unsigned int irq = ih->ih_num; 253 int s; 254 255 s = splhigh(); 256 257 alpha_shared_intr_disestablish(eb66_pci_intr, cookie, 258 "eb66 irq"); 259 if (alpha_shared_intr_isactive(eb66_pci_intr, irq) == 0) { 260 eb66_intr_disable(irq); 261 alpha_shared_intr_set_dfltsharetype(eb66_pci_intr, irq, 262 IST_NONE); 263 scb_free(0x900 + SCB_IDXTOVEC(irq)); 264 } 265 266 splx(s); 267 } 268 269 void 270 eb66_iointr(arg, vec) 271 void *arg; 272 unsigned long vec; 273 { 274 int irq; 275 276 irq = SCB_VECTOIDX(vec - 0x900); 277 278 if (!alpha_shared_intr_dispatch(eb66_pci_intr, irq)) { 279 alpha_shared_intr_stray(eb66_pci_intr, irq, 280 "eb66 irq"); 281 if (ALPHA_SHARED_INTR_DISABLE(eb66_pci_intr, irq)) 282 eb66_intr_disable(irq); 283 } else 284 alpha_shared_intr_reset_strays(eb66_pci_intr, irq); 285 } 286 287 #if 0 /* THIS DOES NOT WORK! see pci_eb66_intr.S. */ 288 u_int8_t eb66_intr_mask[3] = { 0xff, 0xff, 0xff }; 289 290 void 291 eb66_intr_enable(irq) 292 int irq; 293 { 294 int byte = (irq / 8), bit = (irq % 8); 295 296 #if 1 297 printf("eb66_intr_enable: enabling %d (%d:%d)\n", irq, byte, bit); 298 #endif 299 eb66_intr_mask[byte] &= ~(1 << bit); 300 301 bus_space_write_1(eb66_intrgate_iot, eb66_intrgate_ioh, byte, 302 eb66_intr_mask[byte]); 303 } 304 305 void 306 eb66_intr_disable(irq) 307 int irq; 308 { 309 int byte = (irq / 8), bit = (irq % 8); 310 311 #if 1 312 printf("eb66_intr_disable: disabling %d (%d:%d)\n", irq, byte, bit); 313 #endif 314 eb66_intr_mask[byte] |= (1 << bit); 315 316 bus_space_write_1(eb66_intrgate_iot, eb66_intrgate_ioh, byte, 317 eb66_intr_mask[byte]); 318 } 319 #endif 320
Indexes created Tue Sep 30 11:09:46 GMT 2025