1 /* $NetBSD: pci_intr_machdep.c,v 1.1 2006/02/03 19:58:21 bouyer Exp $ */ 2 3 /*- 4 * Copyright (c) 1997, 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) 1996 Christopher G. Demetriou. All rights reserved. 42 * Copyright (c) 1994 Charles M. Hannum. All rights reserved. 43 * 44 * Redistribution and use in source and binary forms, with or without 45 * modification, are permitted provided that the following conditions 46 * are met: 47 * 1. Redistributions of source code must retain the above copyright 48 * notice, this list of conditions and the following disclaimer. 49 * 2. Redistributions in binary form must reproduce the above copyright 50 * notice, this list of conditions and the following disclaimer in the 51 * documentation and/or other materials provided with the distribution. 52 * 3. All advertising materials mentioning features or use of this software 53 * must display the following acknowledgement: 54 * This product includes software developed by Charles M. Hannum. 55 * 4. The name of the author may not be used to endorse or promote products 56 * derived from this software without specific prior written permission. 57 * 58 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 59 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 60 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 61 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 62 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 63 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 64 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 65 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 66 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 67 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 68 */ 69 70 /* 71 * Machine-specific functions for PCI autoconfiguration. 72 * 73 * On PCs, there are two methods of generating PCI configuration cycles. 74 * We try to detect the appropriate mechanism for this machine and set 75 * up a few function pointers to access the correct method directly. 76 * 77 * The configuration method can be hard-coded in the config file by 78 * using `options PCI_CONF_MODE=N', where `N' is the configuration mode 79 * as defined section 3.6.4.1, `Generating Configuration Cycles'. 80 */ 81 82 #include <sys/cdefs.h> 83 __KERNEL_RCSID(0, "$NetBSD: pci_intr_machdep.c,v 1.1 2006/02/03 19:58:21 bouyer Exp $"); 84 85 #include <sys/types.h> 86 #include <sys/param.h> 87 #include <sys/time.h> 88 #include <sys/systm.h> 89 #include <sys/errno.h> 90 #include <sys/device.h> 91 #include <sys/lock.h> 92 93 #include <uvm/uvm_extern.h> 94 95 #include <machine/intr.h> 96 97 #include <dev/pci/pcivar.h> 98 99 #include "ioapic.h" 100 #include "eisa.h" 101 #include "opt_mpbios.h" 102 #include "opt_mpacpi.h" 103 104 #if NIOAPIC > 0 105 #include <machine/i82093var.h> 106 #include <machine/mpbiosvar.h> 107 #include <machine/pic.h> 108 #endif 109 110 #ifdef MPBIOS 111 #include <machine/mpbiosvar.h> 112 #endif 113 114 #ifdef MPACPI 115 #include <machine/mpacpi.h> 116 #endif 117 118 int 119 pci_intr_map(pa, ihp) 120 struct pci_attach_args *pa; 121 pci_intr_handle_t *ihp; 122 { 123 int pin = pa->pa_intrpin; 124 int line = pa->pa_intrline; 125 #if NIOAPIC > 0 126 int rawpin = pa->pa_rawintrpin; 127 pci_chipset_tag_t pc = pa->pa_pc; 128 int bus, dev, func; 129 #endif 130 131 if (pin == 0) { 132 /* No IRQ used. */ 133 goto bad; 134 } 135 136 if (pin > PCI_INTERRUPT_PIN_MAX) { 137 printf("pci_intr_map: bad interrupt pin %d\n", pin); 138 goto bad; 139 } 140 141 #if NIOAPIC > 0 142 pci_decompose_tag(pc, pa->pa_tag, &bus, &dev, &func); 143 if (mp_busses != NULL) { 144 if (intr_find_mpmapping(bus, (dev<<2)|(rawpin-1), ihp) == 0) { 145 *ihp |= line; 146 return 0; 147 } 148 /* 149 * No explicit PCI mapping found. This is not fatal, 150 * we'll try the ISA (or possibly EISA) mappings next. 151 */ 152 } 153 #endif 154 155 /* 156 * Section 6.2.4, `Miscellaneous Functions', says that 255 means 157 * `unknown' or `no connection' on a PC. We assume that a device with 158 * `no connection' either doesn't have an interrupt (in which case the 159 * pin number should be 0, and would have been noticed above), or 160 * wasn't configured by the BIOS (in which case we punt, since there's 161 * no real way we can know how the interrupt lines are mapped in the 162 * hardware). 163 * 164 * XXX 165 * Since IRQ 0 is only used by the clock, and we can't actually be sure 166 * that the BIOS did its job, we also recognize that as meaning that 167 * the BIOS has not configured the device. 168 */ 169 if (line == 0 || line == X86_PCI_INTERRUPT_LINE_NO_CONNECTION) { 170 printf("pci_intr_map: no mapping for pin %c (line=%02x)\n", 171 '@' + pin, line); 172 goto bad; 173 } else { 174 if (line >= NUM_LEGACY_IRQS) { 175 printf("pci_intr_map: bad interrupt line %d\n", line); 176 goto bad; 177 } 178 if (line == 2) { 179 printf("pci_intr_map: changed line 2 to line 9\n"); 180 line = 9; 181 } 182 } 183 #if NIOAPIC > 0 184 if (mp_busses != NULL) { 185 if (intr_find_mpmapping(mp_isa_bus, line, ihp) == 0) { 186 *ihp |= line; 187 return 0; 188 } 189 #if NEISA > 0 190 if (intr_find_mpmapping(mp_eisa_bus, line, ihp) == 0) { 191 *ihp |= line; 192 return 0; 193 } 194 #endif 195 printf("pci_intr_map: bus %d dev %d func %d pin %d; line %d\n", 196 bus, dev, func, pin, line); 197 printf("pci_intr_map: no MP mapping found\n"); 198 } 199 #endif 200 201 *ihp = line; 202 return 0; 203 204 bad: 205 *ihp = -1; 206 return 1; 207 } 208 209 const char * 210 pci_intr_string(pc, ih) 211 pci_chipset_tag_t pc; 212 pci_intr_handle_t ih; 213 { 214 return intr_string(ih); 215 } 216 217 218 const struct evcnt * 219 pci_intr_evcnt(pc, ih) 220 pci_chipset_tag_t pc; 221 pci_intr_handle_t ih; 222 { 223 224 /* XXX for now, no evcnt parent reported */ 225 return NULL; 226 } 227 228 void * 229 pci_intr_establish(pc, ih, level, func, arg) 230 pci_chipset_tag_t pc; 231 pci_intr_handle_t ih; 232 int level, (*func) __P((void *)); 233 void *arg; 234 { 235 int pin, irq; 236 struct pic *pic; 237 238 pic = &i8259_pic; 239 pin = irq = ih; 240 241 #if NIOAPIC > 0 242 if (ih & APIC_INT_VIA_APIC) { 243 pic = (struct pic *)ioapic_find(APIC_IRQ_APIC(ih)); 244 if (pic == NULL) { 245 printf("pci_intr_establish: bad ioapic %d\n", 246 APIC_IRQ_APIC(ih)); 247 return NULL; 248 } 249 pin = APIC_IRQ_PIN(ih); 250 irq = APIC_IRQ_LEGACY_IRQ(ih); 251 if (irq < 0 || irq >= NUM_LEGACY_IRQS) 252 irq = -1; 253 } 254 #endif 255 256 return intr_establish(irq, pic, pin, IST_LEVEL, level, func, arg); 257 } 258 259 void 260 pci_intr_disestablish(pc, cookie) 261 pci_chipset_tag_t pc; 262 void *cookie; 263 { 264 265 intr_disestablish(cookie); 266 } 267