1 /* 2 * boot.c - Architecture-Specific Low-Level ACPI Boot Support 3 * 4 * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com> 5 * Copyright (C) 2001 Jun Nakajima <jun.nakajima@intel.com> 6 * 7 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 8 * 9 * This program is free software; you can redistribute it and/or modify 10 * it under the terms of the GNU General Public License as published by 11 * the Free Software Foundation; either version 2 of the License, or 12 * (at your option) any later version. 13 * 14 * This program is distributed in the hope that it will be useful, 15 * but WITHOUT ANY WARRANTY; without even the implied warranty of 16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 17 * GNU General Public License for more details. 18 * 19 * You should have received a copy of the GNU General Public License 20 * along with this program; if not, write to the Free Software 21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 22 * 23 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 24 */ 25 26 #include <linux/init.h> 27 #include <linux/acpi.h> 28 #include <linux/acpi_pmtmr.h> 29 #include <linux/efi.h> 30 #include <linux/cpumask.h> 31 #include <linux/module.h> 32 #include <linux/dmi.h> 33 #include <linux/irq.h> 34 #include <linux/irqdomain.h> 35 #include <linux/slab.h> 36 #include <linux/bootmem.h> 37 #include <linux/ioport.h> 38 #include <linux/pci.h> 39 40 #include <asm/pci_x86.h> 41 #include <asm/pgtable.h> 42 #include <asm/io_apic.h> 43 #include <asm/apic.h> 44 #include <asm/io.h> 45 #include <asm/mpspec.h> 46 #include <asm/smp.h> 47 #include <asm/i8259.h> 48 49 #include "sleep.h" /* To include x86_acpi_suspend_lowlevel */ 50 static int __initdata acpi_force = 0; 51 int acpi_disabled; 52 EXPORT_SYMBOL(acpi_disabled); 53 54 #ifdef CONFIG_X86_64 55 # include <asm/proto.h> 56 #endif /* X86 */ 57 58 #define PREFIX "ACPI: " 59 60 int acpi_noirq; /* skip ACPI IRQ initialization */ 61 int acpi_pci_disabled; /* skip ACPI PCI scan and IRQ initialization */ 62 EXPORT_SYMBOL(acpi_pci_disabled); 63 64 int acpi_lapic; 65 int acpi_ioapic; 66 int acpi_strict; 67 int acpi_disable_cmcff; 68 69 u8 acpi_sci_flags __initdata; 70 int acpi_sci_override_gsi __initdata; 71 int acpi_skip_timer_override __initdata; 72 int acpi_use_timer_override __initdata; 73 int acpi_fix_pin2_polarity __initdata; 74 75 #ifdef CONFIG_X86_LOCAL_APIC 76 static u64 acpi_lapic_addr __initdata = APIC_DEFAULT_PHYS_BASE; 77 #endif 78 79 /* -------------------------------------------------------------------------- 80 Boot-time Configuration 81 -------------------------------------------------------------------------- */ 82 83 /* 84 * The default interrupt routing model is PIC (8259). This gets 85 * overridden if IOAPICs are enumerated (below). 86 */ 87 enum acpi_irq_model_id acpi_irq_model = ACPI_IRQ_MODEL_PIC; 88 89 90 /* 91 * ISA irqs by default are the first 16 gsis but can be 92 * any gsi as specified by an interrupt source override. 93 */ 94 static u32 isa_irq_to_gsi[NR_IRQS_LEGACY] __read_mostly = { 95 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 96 }; 97 98 #define ACPI_INVALID_GSI INT_MIN 99 100 /* 101 * This is just a simple wrapper around early_ioremap(), 102 * with sanity checks for phys == 0 and size == 0. 103 */ 104 char *__init __acpi_map_table(unsigned long phys, unsigned long size) 105 { 106 107 if (!phys || !size) 108 return NULL; 109 110 return early_ioremap(phys, size); 111 } 112 113 void __init __acpi_unmap_table(char *map, unsigned long size) 114 { 115 if (!map || !size) 116 return; 117 118 early_iounmap(map, size); 119 } 120 121 #ifdef CONFIG_X86_LOCAL_APIC 122 static int __init acpi_parse_madt(struct acpi_table_header *table) 123 { 124 struct acpi_table_madt *madt = NULL; 125 126 if (!cpu_has_apic) 127 return -EINVAL; 128 129 madt = (struct acpi_table_madt *)table; 130 if (!madt) { 131 printk(KERN_WARNING PREFIX "Unable to map MADT\n"); 132 return -ENODEV; 133 } 134 135 if (madt->address) { 136 acpi_lapic_addr = (u64) madt->address; 137 138 printk(KERN_DEBUG PREFIX "Local APIC address 0x%08x\n", 139 madt->address); 140 } 141 142 default_acpi_madt_oem_check(madt->header.oem_id, 143 madt->header.oem_table_id); 144 145 return 0; 146 } 147 148 /** 149 * acpi_register_lapic - register a local apic and generates a logic cpu number 150 * @id: local apic id to register 151 * @enabled: this cpu is enabled or not 152 * 153 * Returns the logic cpu number which maps to the local apic 154 */ 155 static int acpi_register_lapic(int id, u8 enabled) 156 { 157 unsigned int ver = 0; 158 159 if (id >= MAX_LOCAL_APIC) { 160 printk(KERN_INFO PREFIX "skipped apicid that is too big\n"); 161 return -EINVAL; 162 } 163 164 if (!enabled) { 165 ++disabled_cpus; 166 return -EINVAL; 167 } 168 169 if (boot_cpu_physical_apicid != -1U) 170 ver = apic_version[boot_cpu_physical_apicid]; 171 172 return generic_processor_info(id, ver); 173 } 174 175 static int __init 176 acpi_parse_x2apic(struct acpi_subtable_header *header, const unsigned long end) 177 { 178 struct acpi_madt_local_x2apic *processor = NULL; 179 int apic_id; 180 u8 enabled; 181 182 processor = (struct acpi_madt_local_x2apic *)header; 183 184 if (BAD_MADT_ENTRY(processor, end)) 185 return -EINVAL; 186 187 acpi_table_print_madt_entry(header); 188 189 apic_id = processor->local_apic_id; 190 enabled = processor->lapic_flags & ACPI_MADT_ENABLED; 191 #ifdef CONFIG_X86_X2APIC 192 /* 193 * We need to register disabled CPU as well to permit 194 * counting disabled CPUs. This allows us to size 195 * cpus_possible_map more accurately, to permit 196 * to not preallocating memory for all NR_CPUS 197 * when we use CPU hotplug. 198 */ 199 if (!apic->apic_id_valid(apic_id) && enabled) 200 printk(KERN_WARNING PREFIX "x2apic entry ignored\n"); 201 else 202 acpi_register_lapic(apic_id, enabled); 203 #else 204 printk(KERN_WARNING PREFIX "x2apic entry ignored\n"); 205 #endif 206 207 return 0; 208 } 209 210 static int __init 211 acpi_parse_lapic(struct acpi_subtable_header * header, const unsigned long end) 212 { 213 struct acpi_madt_local_apic *processor = NULL; 214 215 processor = (struct acpi_madt_local_apic *)header; 216 217 if (BAD_MADT_ENTRY(processor, end)) 218 return -EINVAL; 219 220 acpi_table_print_madt_entry(header); 221 222 /* 223 * We need to register disabled CPU as well to permit 224 * counting disabled CPUs. This allows us to size 225 * cpus_possible_map more accurately, to permit 226 * to not preallocating memory for all NR_CPUS 227 * when we use CPU hotplug. 228 */ 229 acpi_register_lapic(processor->id, /* APIC ID */ 230 processor->lapic_flags & ACPI_MADT_ENABLED); 231 232 return 0; 233 } 234 235 static int __init 236 acpi_parse_sapic(struct acpi_subtable_header *header, const unsigned long end) 237 { 238 struct acpi_madt_local_sapic *processor = NULL; 239 240 processor = (struct acpi_madt_local_sapic *)header; 241 242 if (BAD_MADT_ENTRY(processor, end)) 243 return -EINVAL; 244 245 acpi_table_print_madt_entry(header); 246 247 acpi_register_lapic((processor->id << 8) | processor->eid,/* APIC ID */ 248 processor->lapic_flags & ACPI_MADT_ENABLED); 249 250 return 0; 251 } 252 253 static int __init 254 acpi_parse_lapic_addr_ovr(struct acpi_subtable_header * header, 255 const unsigned long end) 256 { 257 struct acpi_madt_local_apic_override *lapic_addr_ovr = NULL; 258 259 lapic_addr_ovr = (struct acpi_madt_local_apic_override *)header; 260 261 if (BAD_MADT_ENTRY(lapic_addr_ovr, end)) 262 return -EINVAL; 263 264 acpi_lapic_addr = lapic_addr_ovr->address; 265 266 return 0; 267 } 268 269 static int __init 270 acpi_parse_x2apic_nmi(struct acpi_subtable_header *header, 271 const unsigned long end) 272 { 273 struct acpi_madt_local_x2apic_nmi *x2apic_nmi = NULL; 274 275 x2apic_nmi = (struct acpi_madt_local_x2apic_nmi *)header; 276 277 if (BAD_MADT_ENTRY(x2apic_nmi, end)) 278 return -EINVAL; 279 280 acpi_table_print_madt_entry(header); 281 282 if (x2apic_nmi->lint != 1) 283 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n"); 284 285 return 0; 286 } 287 288 static int __init 289 acpi_parse_lapic_nmi(struct acpi_subtable_header * header, const unsigned long end) 290 { 291 struct acpi_madt_local_apic_nmi *lapic_nmi = NULL; 292 293 lapic_nmi = (struct acpi_madt_local_apic_nmi *)header; 294 295 if (BAD_MADT_ENTRY(lapic_nmi, end)) 296 return -EINVAL; 297 298 acpi_table_print_madt_entry(header); 299 300 if (lapic_nmi->lint != 1) 301 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n"); 302 303 return 0; 304 } 305 306 #endif /*CONFIG_X86_LOCAL_APIC */ 307 308 #ifdef CONFIG_X86_IO_APIC 309 #define MP_ISA_BUS 0 310 311 static void __init mp_override_legacy_irq(u8 bus_irq, u8 polarity, u8 trigger, 312 u32 gsi) 313 { 314 int ioapic; 315 int pin; 316 struct mpc_intsrc mp_irq; 317 318 /* 319 * Convert 'gsi' to 'ioapic.pin'. 320 */ 321 ioapic = mp_find_ioapic(gsi); 322 if (ioapic < 0) 323 return; 324 pin = mp_find_ioapic_pin(ioapic, gsi); 325 326 /* 327 * TBD: This check is for faulty timer entries, where the override 328 * erroneously sets the trigger to level, resulting in a HUGE 329 * increase of timer interrupts! 330 */ 331 if ((bus_irq == 0) && (trigger == 3)) 332 trigger = 1; 333 334 mp_irq.type = MP_INTSRC; 335 mp_irq.irqtype = mp_INT; 336 mp_irq.irqflag = (trigger << 2) | polarity; 337 mp_irq.srcbus = MP_ISA_BUS; 338 mp_irq.srcbusirq = bus_irq; /* IRQ */ 339 mp_irq.dstapic = mpc_ioapic_id(ioapic); /* APIC ID */ 340 mp_irq.dstirq = pin; /* INTIN# */ 341 342 mp_save_irq(&mp_irq); 343 344 /* 345 * Reset default identity mapping if gsi is also an legacy IRQ, 346 * otherwise there will be more than one entry with the same GSI 347 * and acpi_isa_irq_to_gsi() may give wrong result. 348 */ 349 if (gsi < nr_legacy_irqs() && isa_irq_to_gsi[gsi] == gsi) 350 isa_irq_to_gsi[gsi] = ACPI_INVALID_GSI; 351 isa_irq_to_gsi[bus_irq] = gsi; 352 } 353 354 static int mp_config_acpi_gsi(struct device *dev, u32 gsi, int trigger, 355 int polarity) 356 { 357 #ifdef CONFIG_X86_MPPARSE 358 struct mpc_intsrc mp_irq; 359 struct pci_dev *pdev; 360 unsigned char number; 361 unsigned int devfn; 362 int ioapic; 363 u8 pin; 364 365 if (!acpi_ioapic) 366 return 0; 367 if (!dev || !dev_is_pci(dev)) 368 return 0; 369 370 pdev = to_pci_dev(dev); 371 number = pdev->bus->number; 372 devfn = pdev->devfn; 373 pin = pdev->pin; 374 /* print the entry should happen on mptable identically */ 375 mp_irq.type = MP_INTSRC; 376 mp_irq.irqtype = mp_INT; 377 mp_irq.irqflag = (trigger == ACPI_EDGE_SENSITIVE ? 4 : 0x0c) | 378 (polarity == ACPI_ACTIVE_HIGH ? 1 : 3); 379 mp_irq.srcbus = number; 380 mp_irq.srcbusirq = (((devfn >> 3) & 0x1f) << 2) | ((pin - 1) & 3); 381 ioapic = mp_find_ioapic(gsi); 382 mp_irq.dstapic = mpc_ioapic_id(ioapic); 383 mp_irq.dstirq = mp_find_ioapic_pin(ioapic, gsi); 384 385 mp_save_irq(&mp_irq); 386 #endif 387 return 0; 388 } 389 390 static int mp_register_gsi(struct device *dev, u32 gsi, int trigger, 391 int polarity) 392 { 393 int irq, node; 394 395 if (acpi_irq_model != ACPI_IRQ_MODEL_IOAPIC) 396 return gsi; 397 398 /* Don't set up the ACPI SCI because it's already set up */ 399 if (acpi_gbl_FADT.sci_interrupt == gsi) 400 return mp_map_gsi_to_irq(gsi, IOAPIC_MAP_ALLOC); 401 402 trigger = trigger == ACPI_EDGE_SENSITIVE ? 0 : 1; 403 polarity = polarity == ACPI_ACTIVE_HIGH ? 0 : 1; 404 node = dev ? dev_to_node(dev) : NUMA_NO_NODE; 405 if (mp_set_gsi_attr(gsi, trigger, polarity, node)) { 406 pr_warn("Failed to set pin attr for GSI%d\n", gsi); 407 return -1; 408 } 409 410 irq = mp_map_gsi_to_irq(gsi, IOAPIC_MAP_ALLOC); 411 if (irq < 0) 412 return irq; 413 414 if (enable_update_mptable) 415 mp_config_acpi_gsi(dev, gsi, trigger, polarity); 416 417 return irq; 418 } 419 420 static void mp_unregister_gsi(u32 gsi) 421 { 422 int irq; 423 424 if (acpi_irq_model != ACPI_IRQ_MODEL_IOAPIC) 425 return; 426 427 if (acpi_gbl_FADT.sci_interrupt == gsi) 428 return; 429 430 irq = mp_map_gsi_to_irq(gsi, 0); 431 if (irq > 0) 432 mp_unmap_irq(irq); 433 } 434 435 static struct irq_domain_ops acpi_irqdomain_ops = { 436 .map = mp_irqdomain_map, 437 .unmap = mp_irqdomain_unmap, 438 }; 439 440 static int __init 441 acpi_parse_ioapic(struct acpi_subtable_header * header, const unsigned long end) 442 { 443 struct acpi_madt_io_apic *ioapic = NULL; 444 struct ioapic_domain_cfg cfg = { 445 .type = IOAPIC_DOMAIN_DYNAMIC, 446 .ops = &acpi_irqdomain_ops, 447 }; 448 449 ioapic = (struct acpi_madt_io_apic *)header; 450 451 if (BAD_MADT_ENTRY(ioapic, end)) 452 return -EINVAL; 453 454 acpi_table_print_madt_entry(header); 455 456 /* Statically assign IRQ numbers for IOAPICs hosting legacy IRQs */ 457 if (ioapic->global_irq_base < nr_legacy_irqs()) 458 cfg.type = IOAPIC_DOMAIN_LEGACY; 459 460 mp_register_ioapic(ioapic->id, ioapic->address, ioapic->global_irq_base, 461 &cfg); 462 463 return 0; 464 } 465 466 /* 467 * Parse Interrupt Source Override for the ACPI SCI 468 */ 469 static void __init acpi_sci_ioapic_setup(u8 bus_irq, u16 polarity, u16 trigger, u32 gsi) 470 { 471 if (trigger == 0) /* compatible SCI trigger is level */ 472 trigger = 3; 473 474 if (polarity == 0) /* compatible SCI polarity is low */ 475 polarity = 3; 476 477 /* Command-line over-ride via acpi_sci= */ 478 if (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) 479 trigger = (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2; 480 481 if (acpi_sci_flags & ACPI_MADT_POLARITY_MASK) 482 polarity = acpi_sci_flags & ACPI_MADT_POLARITY_MASK; 483 484 mp_override_legacy_irq(bus_irq, polarity, trigger, gsi); 485 486 /* 487 * stash over-ride to indicate we've been here 488 * and for later update of acpi_gbl_FADT 489 */ 490 acpi_sci_override_gsi = gsi; 491 return; 492 } 493 494 static int __init 495 acpi_parse_int_src_ovr(struct acpi_subtable_header * header, 496 const unsigned long end) 497 { 498 struct acpi_madt_interrupt_override *intsrc = NULL; 499 500 intsrc = (struct acpi_madt_interrupt_override *)header; 501 502 if (BAD_MADT_ENTRY(intsrc, end)) 503 return -EINVAL; 504 505 acpi_table_print_madt_entry(header); 506 507 if (intsrc->source_irq == acpi_gbl_FADT.sci_interrupt) { 508 acpi_sci_ioapic_setup(intsrc->source_irq, 509 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK, 510 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2, 511 intsrc->global_irq); 512 return 0; 513 } 514 515 if (intsrc->source_irq == 0) { 516 if (acpi_skip_timer_override) { 517 printk(PREFIX "BIOS IRQ0 override ignored.\n"); 518 return 0; 519 } 520 521 if ((intsrc->global_irq == 2) && acpi_fix_pin2_polarity 522 && (intsrc->inti_flags & ACPI_MADT_POLARITY_MASK)) { 523 intsrc->inti_flags &= ~ACPI_MADT_POLARITY_MASK; 524 printk(PREFIX "BIOS IRQ0 pin2 override: forcing polarity to high active.\n"); 525 } 526 } 527 528 mp_override_legacy_irq(intsrc->source_irq, 529 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK, 530 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2, 531 intsrc->global_irq); 532 533 return 0; 534 } 535 536 static int __init 537 acpi_parse_nmi_src(struct acpi_subtable_header * header, const unsigned long end) 538 { 539 struct acpi_madt_nmi_source *nmi_src = NULL; 540 541 nmi_src = (struct acpi_madt_nmi_source *)header; 542 543 if (BAD_MADT_ENTRY(nmi_src, end)) 544 return -EINVAL; 545 546 acpi_table_print_madt_entry(header); 547 548 /* TBD: Support nimsrc entries? */ 549 550 return 0; 551 } 552 553 #endif /* CONFIG_X86_IO_APIC */ 554 555 /* 556 * acpi_pic_sci_set_trigger() 557 * 558 * use ELCR to set PIC-mode trigger type for SCI 559 * 560 * If a PIC-mode SCI is not recognized or gives spurious IRQ7's 561 * it may require Edge Trigger -- use "acpi_sci=edge" 562 * 563 * Port 0x4d0-4d1 are ECLR1 and ECLR2, the Edge/Level Control Registers 564 * for the 8259 PIC. bit[n] = 1 means irq[n] is Level, otherwise Edge. 565 * ECLR1 is IRQs 0-7 (IRQ 0, 1, 2 must be 0) 566 * ECLR2 is IRQs 8-15 (IRQ 8, 13 must be 0) 567 */ 568 569 void __init acpi_pic_sci_set_trigger(unsigned int irq, u16 trigger) 570 { 571 unsigned int mask = 1 << irq; 572 unsigned int old, new; 573 574 /* Real old ELCR mask */ 575 old = inb(0x4d0) | (inb(0x4d1) << 8); 576 577 /* 578 * If we use ACPI to set PCI IRQs, then we should clear ELCR 579 * since we will set it correctly as we enable the PCI irq 580 * routing. 581 */ 582 new = acpi_noirq ? old : 0; 583 584 /* 585 * Update SCI information in the ELCR, it isn't in the PCI 586 * routing tables.. 587 */ 588 switch (trigger) { 589 case 1: /* Edge - clear */ 590 new &= ~mask; 591 break; 592 case 3: /* Level - set */ 593 new |= mask; 594 break; 595 } 596 597 if (old == new) 598 return; 599 600 printk(PREFIX "setting ELCR to %04x (from %04x)\n", new, old); 601 outb(new, 0x4d0); 602 outb(new >> 8, 0x4d1); 603 } 604 605 int acpi_gsi_to_irq(u32 gsi, unsigned int *irqp) 606 { 607 int irq; 608 609 if (acpi_irq_model == ACPI_IRQ_MODEL_PIC) { 610 *irqp = gsi; 611 } else { 612 irq = mp_map_gsi_to_irq(gsi, 613 IOAPIC_MAP_ALLOC | IOAPIC_MAP_CHECK); 614 if (irq < 0) 615 return -1; 616 *irqp = irq; 617 } 618 return 0; 619 } 620 EXPORT_SYMBOL_GPL(acpi_gsi_to_irq); 621 622 int acpi_isa_irq_to_gsi(unsigned isa_irq, u32 *gsi) 623 { 624 if (isa_irq < nr_legacy_irqs() && 625 isa_irq_to_gsi[isa_irq] != ACPI_INVALID_GSI) { 626 *gsi = isa_irq_to_gsi[isa_irq]; 627 return 0; 628 } 629 630 return -1; 631 } 632 633 static int acpi_register_gsi_pic(struct device *dev, u32 gsi, 634 int trigger, int polarity) 635 { 636 #ifdef CONFIG_PCI 637 /* 638 * Make sure all (legacy) PCI IRQs are set as level-triggered. 639 */ 640 if (trigger == ACPI_LEVEL_SENSITIVE) 641 eisa_set_level_irq(gsi); 642 #endif 643 644 return gsi; 645 } 646 647 static int acpi_register_gsi_ioapic(struct device *dev, u32 gsi, 648 int trigger, int polarity) 649 { 650 int irq = gsi; 651 652 #ifdef CONFIG_X86_IO_APIC 653 irq = mp_register_gsi(dev, gsi, trigger, polarity); 654 #endif 655 656 return irq; 657 } 658 659 static void acpi_unregister_gsi_ioapic(u32 gsi) 660 { 661 #ifdef CONFIG_X86_IO_APIC 662 mp_unregister_gsi(gsi); 663 #endif 664 } 665 666 int (*__acpi_register_gsi)(struct device *dev, u32 gsi, 667 int trigger, int polarity) = acpi_register_gsi_pic; 668 void (*__acpi_unregister_gsi)(u32 gsi) = NULL; 669 670 #ifdef CONFIG_ACPI_SLEEP 671 int (*acpi_suspend_lowlevel)(void) = x86_acpi_suspend_lowlevel; 672 #else 673 int (*acpi_suspend_lowlevel)(void); 674 #endif 675 676 /* 677 * success: return IRQ number (>=0) 678 * failure: return < 0 679 */ 680 int acpi_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity) 681 { 682 return __acpi_register_gsi(dev, gsi, trigger, polarity); 683 } 684 EXPORT_SYMBOL_GPL(acpi_register_gsi); 685 686 void acpi_unregister_gsi(u32 gsi) 687 { 688 if (__acpi_unregister_gsi) 689 __acpi_unregister_gsi(gsi); 690 } 691 EXPORT_SYMBOL_GPL(acpi_unregister_gsi); 692 693 static void __init acpi_set_irq_model_ioapic(void) 694 { 695 acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC; 696 __acpi_register_gsi = acpi_register_gsi_ioapic; 697 __acpi_unregister_gsi = acpi_unregister_gsi_ioapic; 698 acpi_ioapic = 1; 699 } 700 701 /* 702 * ACPI based hotplug support for CPU 703 */ 704 #ifdef CONFIG_ACPI_HOTPLUG_CPU 705 #include <acpi/processor.h> 706 707 static void acpi_map_cpu2node(acpi_handle handle, int cpu, int physid) 708 { 709 #ifdef CONFIG_ACPI_NUMA 710 int nid; 711 712 nid = acpi_get_node(handle); 713 if (nid != -1) { 714 set_apicid_to_node(physid, nid); 715 numa_set_node(cpu, nid); 716 } 717 #endif 718 } 719 720 static int _acpi_map_lsapic(acpi_handle handle, int physid, int *pcpu) 721 { 722 int cpu; 723 724 cpu = acpi_register_lapic(physid, ACPI_MADT_ENABLED); 725 if (cpu < 0) { 726 pr_info(PREFIX "Unable to map lapic to logical cpu number\n"); 727 return cpu; 728 } 729 730 acpi_processor_set_pdc(handle); 731 acpi_map_cpu2node(handle, cpu, physid); 732 733 *pcpu = cpu; 734 return 0; 735 } 736 737 /* wrapper to silence section mismatch warning */ 738 int __ref acpi_map_lsapic(acpi_handle handle, int physid, int *pcpu) 739 { 740 return _acpi_map_lsapic(handle, physid, pcpu); 741 } 742 EXPORT_SYMBOL(acpi_map_lsapic); 743 744 int acpi_unmap_lsapic(int cpu) 745 { 746 #ifdef CONFIG_ACPI_NUMA 747 set_apicid_to_node(per_cpu(x86_cpu_to_apicid, cpu), NUMA_NO_NODE); 748 #endif 749 750 per_cpu(x86_cpu_to_apicid, cpu) = -1; 751 set_cpu_present(cpu, false); 752 num_processors--; 753 754 return (0); 755 } 756 757 EXPORT_SYMBOL(acpi_unmap_lsapic); 758 #endif /* CONFIG_ACPI_HOTPLUG_CPU */ 759 760 int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base) 761 { 762 /* TBD */ 763 return -EINVAL; 764 } 765 766 EXPORT_SYMBOL(acpi_register_ioapic); 767 768 int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base) 769 { 770 /* TBD */ 771 return -EINVAL; 772 } 773 774 EXPORT_SYMBOL(acpi_unregister_ioapic); 775 776 static int __init acpi_parse_sbf(struct acpi_table_header *table) 777 { 778 struct acpi_table_boot *sb; 779 780 sb = (struct acpi_table_boot *)table; 781 if (!sb) { 782 printk(KERN_WARNING PREFIX "Unable to map SBF\n"); 783 return -ENODEV; 784 } 785 786 sbf_port = sb->cmos_index; /* Save CMOS port */ 787 788 return 0; 789 } 790 791 #ifdef CONFIG_HPET_TIMER 792 #include <asm/hpet.h> 793 794 static struct resource *hpet_res __initdata; 795 796 static int __init acpi_parse_hpet(struct acpi_table_header *table) 797 { 798 struct acpi_table_hpet *hpet_tbl; 799 800 hpet_tbl = (struct acpi_table_hpet *)table; 801 if (!hpet_tbl) { 802 printk(KERN_WARNING PREFIX "Unable to map HPET\n"); 803 return -ENODEV; 804 } 805 806 if (hpet_tbl->address.space_id != ACPI_SPACE_MEM) { 807 printk(KERN_WARNING PREFIX "HPET timers must be located in " 808 "memory.\n"); 809 return -1; 810 } 811 812 hpet_address = hpet_tbl->address.address; 813 hpet_blockid = hpet_tbl->sequence; 814 815 /* 816 * Some broken BIOSes advertise HPET at 0x0. We really do not 817 * want to allocate a resource there. 818 */ 819 if (!hpet_address) { 820 printk(KERN_WARNING PREFIX 821 "HPET id: %#x base: %#lx is invalid\n", 822 hpet_tbl->id, hpet_address); 823 return 0; 824 } 825 #ifdef CONFIG_X86_64 826 /* 827 * Some even more broken BIOSes advertise HPET at 828 * 0xfed0000000000000 instead of 0xfed00000. Fix it up and add 829 * some noise: 830 */ 831 if (hpet_address == 0xfed0000000000000UL) { 832 if (!hpet_force_user) { 833 printk(KERN_WARNING PREFIX "HPET id: %#x " 834 "base: 0xfed0000000000000 is bogus\n " 835 "try hpet=force on the kernel command line to " 836 "fix it up to 0xfed00000.\n", hpet_tbl->id); 837 hpet_address = 0; 838 return 0; 839 } 840 printk(KERN_WARNING PREFIX 841 "HPET id: %#x base: 0xfed0000000000000 fixed up " 842 "to 0xfed00000.\n", hpet_tbl->id); 843 hpet_address >>= 32; 844 } 845 #endif 846 printk(KERN_INFO PREFIX "HPET id: %#x base: %#lx\n", 847 hpet_tbl->id, hpet_address); 848 849 /* 850 * Allocate and initialize the HPET firmware resource for adding into 851 * the resource tree during the lateinit timeframe. 852 */ 853 #define HPET_RESOURCE_NAME_SIZE 9 854 hpet_res = alloc_bootmem(sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE); 855 856 hpet_res->name = (void *)&hpet_res[1]; 857 hpet_res->flags = IORESOURCE_MEM; 858 snprintf((char *)hpet_res->name, HPET_RESOURCE_NAME_SIZE, "HPET %u", 859 hpet_tbl->sequence); 860 861 hpet_res->start = hpet_address; 862 hpet_res->end = hpet_address + (1 * 1024) - 1; 863 864 return 0; 865 } 866 867 /* 868 * hpet_insert_resource inserts the HPET resources used into the resource 869 * tree. 870 */ 871 static __init int hpet_insert_resource(void) 872 { 873 if (!hpet_res) 874 return 1; 875 876 return insert_resource(&iomem_resource, hpet_res); 877 } 878 879 late_initcall(hpet_insert_resource); 880 881 #else 882 #define acpi_parse_hpet NULL 883 #endif 884 885 static int __init acpi_parse_fadt(struct acpi_table_header *table) 886 { 887 888 #ifdef CONFIG_X86_PM_TIMER 889 /* detect the location of the ACPI PM Timer */ 890 if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID) { 891 /* FADT rev. 2 */ 892 if (acpi_gbl_FADT.xpm_timer_block.space_id != 893 ACPI_ADR_SPACE_SYSTEM_IO) 894 return 0; 895 896 pmtmr_ioport = acpi_gbl_FADT.xpm_timer_block.address; 897 /* 898 * "X" fields are optional extensions to the original V1.0 899 * fields, so we must selectively expand V1.0 fields if the 900 * corresponding X field is zero. 901 */ 902 if (!pmtmr_ioport) 903 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block; 904 } else { 905 /* FADT rev. 1 */ 906 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block; 907 } 908 if (pmtmr_ioport) 909 printk(KERN_INFO PREFIX "PM-Timer IO Port: %#x\n", 910 pmtmr_ioport); 911 #endif 912 return 0; 913 } 914 915 #ifdef CONFIG_X86_LOCAL_APIC 916 /* 917 * Parse LAPIC entries in MADT 918 * returns 0 on success, < 0 on error 919 */ 920 921 static int __init early_acpi_parse_madt_lapic_addr_ovr(void) 922 { 923 int count; 924 925 if (!cpu_has_apic) 926 return -ENODEV; 927 928 /* 929 * Note that the LAPIC address is obtained from the MADT (32-bit value) 930 * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value). 931 */ 932 933 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE, 934 acpi_parse_lapic_addr_ovr, 0); 935 if (count < 0) { 936 printk(KERN_ERR PREFIX 937 "Error parsing LAPIC address override entry\n"); 938 return count; 939 } 940 941 register_lapic_address(acpi_lapic_addr); 942 943 return count; 944 } 945 946 static int __init acpi_parse_madt_lapic_entries(void) 947 { 948 int count; 949 int x2count = 0; 950 951 if (!cpu_has_apic) 952 return -ENODEV; 953 954 /* 955 * Note that the LAPIC address is obtained from the MADT (32-bit value) 956 * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value). 957 */ 958 959 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE, 960 acpi_parse_lapic_addr_ovr, 0); 961 if (count < 0) { 962 printk(KERN_ERR PREFIX 963 "Error parsing LAPIC address override entry\n"); 964 return count; 965 } 966 967 register_lapic_address(acpi_lapic_addr); 968 969 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC, 970 acpi_parse_sapic, MAX_LOCAL_APIC); 971 972 if (!count) { 973 x2count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC, 974 acpi_parse_x2apic, MAX_LOCAL_APIC); 975 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC, 976 acpi_parse_lapic, MAX_LOCAL_APIC); 977 } 978 if (!count && !x2count) { 979 printk(KERN_ERR PREFIX "No LAPIC entries present\n"); 980 /* TBD: Cleanup to allow fallback to MPS */ 981 return -ENODEV; 982 } else if (count < 0 || x2count < 0) { 983 printk(KERN_ERR PREFIX "Error parsing LAPIC entry\n"); 984 /* TBD: Cleanup to allow fallback to MPS */ 985 return count; 986 } 987 988 x2count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC_NMI, 989 acpi_parse_x2apic_nmi, 0); 990 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI, 991 acpi_parse_lapic_nmi, 0); 992 if (count < 0 || x2count < 0) { 993 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n"); 994 /* TBD: Cleanup to allow fallback to MPS */ 995 return count; 996 } 997 return 0; 998 } 999 #endif /* CONFIG_X86_LOCAL_APIC */ 1000 1001 #ifdef CONFIG_X86_IO_APIC 1002 static void __init mp_config_acpi_legacy_irqs(void) 1003 { 1004 int i; 1005 struct mpc_intsrc mp_irq; 1006 1007 #ifdef CONFIG_EISA 1008 /* 1009 * Fabricate the legacy ISA bus (bus #31). 1010 */ 1011 mp_bus_id_to_type[MP_ISA_BUS] = MP_BUS_ISA; 1012 #endif 1013 set_bit(MP_ISA_BUS, mp_bus_not_pci); 1014 pr_debug("Bus #%d is ISA\n", MP_ISA_BUS); 1015 1016 /* 1017 * Use the default configuration for the IRQs 0-15. Unless 1018 * overridden by (MADT) interrupt source override entries. 1019 */ 1020 for (i = 0; i < nr_legacy_irqs(); i++) { 1021 int ioapic, pin; 1022 unsigned int dstapic; 1023 int idx; 1024 u32 gsi; 1025 1026 /* Locate the gsi that irq i maps to. */ 1027 if (acpi_isa_irq_to_gsi(i, &gsi)) 1028 continue; 1029 1030 /* 1031 * Locate the IOAPIC that manages the ISA IRQ. 1032 */ 1033 ioapic = mp_find_ioapic(gsi); 1034 if (ioapic < 0) 1035 continue; 1036 pin = mp_find_ioapic_pin(ioapic, gsi); 1037 dstapic = mpc_ioapic_id(ioapic); 1038 1039 for (idx = 0; idx < mp_irq_entries; idx++) { 1040 struct mpc_intsrc *irq = mp_irqs + idx; 1041 1042 /* Do we already have a mapping for this ISA IRQ? */ 1043 if (irq->srcbus == MP_ISA_BUS && irq->srcbusirq == i) 1044 break; 1045 1046 /* Do we already have a mapping for this IOAPIC pin */ 1047 if (irq->dstapic == dstapic && irq->dstirq == pin) 1048 break; 1049 } 1050 1051 if (idx != mp_irq_entries) { 1052 printk(KERN_DEBUG "ACPI: IRQ%d used by override.\n", i); 1053 continue; /* IRQ already used */ 1054 } 1055 1056 mp_irq.type = MP_INTSRC; 1057 mp_irq.irqflag = 0; /* Conforming */ 1058 mp_irq.srcbus = MP_ISA_BUS; 1059 mp_irq.dstapic = dstapic; 1060 mp_irq.irqtype = mp_INT; 1061 mp_irq.srcbusirq = i; /* Identity mapped */ 1062 mp_irq.dstirq = pin; 1063 1064 mp_save_irq(&mp_irq); 1065 } 1066 } 1067 1068 /* 1069 * Parse IOAPIC related entries in MADT 1070 * returns 0 on success, < 0 on error 1071 */ 1072 static int __init acpi_parse_madt_ioapic_entries(void) 1073 { 1074 int count; 1075 1076 /* 1077 * ACPI interpreter is required to complete interrupt setup, 1078 * so if it is off, don't enumerate the io-apics with ACPI. 1079 * If MPS is present, it will handle them, 1080 * otherwise the system will stay in PIC mode 1081 */ 1082 if (acpi_disabled || acpi_noirq) 1083 return -ENODEV; 1084 1085 if (!cpu_has_apic) 1086 return -ENODEV; 1087 1088 /* 1089 * if "noapic" boot option, don't look for IO-APICs 1090 */ 1091 if (skip_ioapic_setup) { 1092 printk(KERN_INFO PREFIX "Skipping IOAPIC probe " 1093 "due to 'noapic' option.\n"); 1094 return -ENODEV; 1095 } 1096 1097 count = acpi_table_parse_madt(ACPI_MADT_TYPE_IO_APIC, acpi_parse_ioapic, 1098 MAX_IO_APICS); 1099 if (!count) { 1100 printk(KERN_ERR PREFIX "No IOAPIC entries present\n"); 1101 return -ENODEV; 1102 } else if (count < 0) { 1103 printk(KERN_ERR PREFIX "Error parsing IOAPIC entry\n"); 1104 return count; 1105 } 1106 1107 count = acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE, 1108 acpi_parse_int_src_ovr, nr_irqs); 1109 if (count < 0) { 1110 printk(KERN_ERR PREFIX 1111 "Error parsing interrupt source overrides entry\n"); 1112 /* TBD: Cleanup to allow fallback to MPS */ 1113 return count; 1114 } 1115 1116 /* 1117 * If BIOS did not supply an INT_SRC_OVR for the SCI 1118 * pretend we got one so we can set the SCI flags. 1119 */ 1120 if (!acpi_sci_override_gsi) 1121 acpi_sci_ioapic_setup(acpi_gbl_FADT.sci_interrupt, 0, 0, 1122 acpi_gbl_FADT.sci_interrupt); 1123 1124 /* Fill in identity legacy mappings where no override */ 1125 mp_config_acpi_legacy_irqs(); 1126 1127 count = acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE, 1128 acpi_parse_nmi_src, nr_irqs); 1129 if (count < 0) { 1130 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n"); 1131 /* TBD: Cleanup to allow fallback to MPS */ 1132 return count; 1133 } 1134 1135 return 0; 1136 } 1137 #else 1138 static inline int acpi_parse_madt_ioapic_entries(void) 1139 { 1140 return -1; 1141 } 1142 #endif /* !CONFIG_X86_IO_APIC */ 1143 1144 static void __init early_acpi_process_madt(void) 1145 { 1146 #ifdef CONFIG_X86_LOCAL_APIC 1147 int error; 1148 1149 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) { 1150 1151 /* 1152 * Parse MADT LAPIC entries 1153 */ 1154 error = early_acpi_parse_madt_lapic_addr_ovr(); 1155 if (!error) { 1156 acpi_lapic = 1; 1157 smp_found_config = 1; 1158 } 1159 if (error == -EINVAL) { 1160 /* 1161 * Dell Precision Workstation 410, 610 come here. 1162 */ 1163 printk(KERN_ERR PREFIX 1164 "Invalid BIOS MADT, disabling ACPI\n"); 1165 disable_acpi(); 1166 } 1167 } 1168 #endif 1169 } 1170 1171 static void __init acpi_process_madt(void) 1172 { 1173 #ifdef CONFIG_X86_LOCAL_APIC 1174 int error; 1175 1176 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) { 1177 1178 /* 1179 * Parse MADT LAPIC entries 1180 */ 1181 error = acpi_parse_madt_lapic_entries(); 1182 if (!error) { 1183 acpi_lapic = 1; 1184 1185 /* 1186 * Parse MADT IO-APIC entries 1187 */ 1188 error = acpi_parse_madt_ioapic_entries(); 1189 if (!error) { 1190 acpi_set_irq_model_ioapic(); 1191 1192 smp_found_config = 1; 1193 } 1194 } 1195 if (error == -EINVAL) { 1196 /* 1197 * Dell Precision Workstation 410, 610 come here. 1198 */ 1199 printk(KERN_ERR PREFIX 1200 "Invalid BIOS MADT, disabling ACPI\n"); 1201 disable_acpi(); 1202 } 1203 } else { 1204 /* 1205 * ACPI found no MADT, and so ACPI wants UP PIC mode. 1206 * In the event an MPS table was found, forget it. 1207 * Boot with "acpi=off" to use MPS on such a system. 1208 */ 1209 if (smp_found_config) { 1210 printk(KERN_WARNING PREFIX 1211 "No APIC-table, disabling MPS\n"); 1212 smp_found_config = 0; 1213 } 1214 } 1215 1216 /* 1217 * ACPI supports both logical (e.g. Hyper-Threading) and physical 1218 * processors, where MPS only supports physical. 1219 */ 1220 if (acpi_lapic && acpi_ioapic) 1221 printk(KERN_INFO "Using ACPI (MADT) for SMP configuration " 1222 "information\n"); 1223 else if (acpi_lapic) 1224 printk(KERN_INFO "Using ACPI for processor (LAPIC) " 1225 "configuration information\n"); 1226 #endif 1227 return; 1228 } 1229 1230 static int __init disable_acpi_irq(const struct dmi_system_id *d) 1231 { 1232 if (!acpi_force) { 1233 printk(KERN_NOTICE "%s detected: force use of acpi=noirq\n", 1234 d->ident); 1235 acpi_noirq_set(); 1236 } 1237 return 0; 1238 } 1239 1240 static int __init disable_acpi_pci(const struct dmi_system_id *d) 1241 { 1242 if (!acpi_force) { 1243 printk(KERN_NOTICE "%s detected: force use of pci=noacpi\n", 1244 d->ident); 1245 acpi_disable_pci(); 1246 } 1247 return 0; 1248 } 1249 1250 static int __init dmi_disable_acpi(const struct dmi_system_id *d) 1251 { 1252 if (!acpi_force) { 1253 printk(KERN_NOTICE "%s detected: acpi off\n", d->ident); 1254 disable_acpi(); 1255 } else { 1256 printk(KERN_NOTICE 1257 "Warning: DMI blacklist says broken, but acpi forced\n"); 1258 } 1259 return 0; 1260 } 1261 1262 /* 1263 * Force ignoring BIOS IRQ0 override 1264 */ 1265 static int __init dmi_ignore_irq0_timer_override(const struct dmi_system_id *d) 1266 { 1267 if (!acpi_skip_timer_override) { 1268 pr_notice("%s detected: Ignoring BIOS IRQ0 override\n", 1269 d->ident); 1270 acpi_skip_timer_override = 1; 1271 } 1272 return 0; 1273 } 1274 1275 /* 1276 * If your system is blacklisted here, but you find that acpi=force 1277 * works for you, please contact linux-acpi@vger.kernel.org 1278 */ 1279 static struct dmi_system_id __initdata acpi_dmi_table[] = { 1280 /* 1281 * Boxes that need ACPI disabled 1282 */ 1283 { 1284 .callback = dmi_disable_acpi, 1285 .ident = "IBM Thinkpad", 1286 .matches = { 1287 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), 1288 DMI_MATCH(DMI_BOARD_NAME, "2629H1G"), 1289 }, 1290 }, 1291 1292 /* 1293 * Boxes that need ACPI PCI IRQ routing disabled 1294 */ 1295 { 1296 .callback = disable_acpi_irq, 1297 .ident = "ASUS A7V", 1298 .matches = { 1299 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC"), 1300 DMI_MATCH(DMI_BOARD_NAME, "<A7V>"), 1301 /* newer BIOS, Revision 1011, does work */ 1302 DMI_MATCH(DMI_BIOS_VERSION, 1303 "ASUS A7V ACPI BIOS Revision 1007"), 1304 }, 1305 }, 1306 { 1307 /* 1308 * Latest BIOS for IBM 600E (1.16) has bad pcinum 1309 * for LPC bridge, which is needed for the PCI 1310 * interrupt links to work. DSDT fix is in bug 5966. 1311 * 2645, 2646 model numbers are shared with 600/600E/600X 1312 */ 1313 .callback = disable_acpi_irq, 1314 .ident = "IBM Thinkpad 600 Series 2645", 1315 .matches = { 1316 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), 1317 DMI_MATCH(DMI_BOARD_NAME, "2645"), 1318 }, 1319 }, 1320 { 1321 .callback = disable_acpi_irq, 1322 .ident = "IBM Thinkpad 600 Series 2646", 1323 .matches = { 1324 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), 1325 DMI_MATCH(DMI_BOARD_NAME, "2646"), 1326 }, 1327 }, 1328 /* 1329 * Boxes that need ACPI PCI IRQ routing and PCI scan disabled 1330 */ 1331 { /* _BBN 0 bug */ 1332 .callback = disable_acpi_pci, 1333 .ident = "ASUS PR-DLS", 1334 .matches = { 1335 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."), 1336 DMI_MATCH(DMI_BOARD_NAME, "PR-DLS"), 1337 DMI_MATCH(DMI_BIOS_VERSION, 1338 "ASUS PR-DLS ACPI BIOS Revision 1010"), 1339 DMI_MATCH(DMI_BIOS_DATE, "03/21/2003") 1340 }, 1341 }, 1342 { 1343 .callback = disable_acpi_pci, 1344 .ident = "Acer TravelMate 36x Laptop", 1345 .matches = { 1346 DMI_MATCH(DMI_SYS_VENDOR, "Acer"), 1347 DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"), 1348 }, 1349 }, 1350 {} 1351 }; 1352 1353 /* second table for DMI checks that should run after early-quirks */ 1354 static struct dmi_system_id __initdata acpi_dmi_table_late[] = { 1355 /* 1356 * HP laptops which use a DSDT reporting as HP/SB400/10000, 1357 * which includes some code which overrides all temperature 1358 * trip points to 16C if the INTIN2 input of the I/O APIC 1359 * is enabled. This input is incorrectly designated the 1360 * ISA IRQ 0 via an interrupt source override even though 1361 * it is wired to the output of the master 8259A and INTIN0 1362 * is not connected at all. Force ignoring BIOS IRQ0 1363 * override in that cases. 1364 */ 1365 { 1366 .callback = dmi_ignore_irq0_timer_override, 1367 .ident = "HP nx6115 laptop", 1368 .matches = { 1369 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 1370 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6115"), 1371 }, 1372 }, 1373 { 1374 .callback = dmi_ignore_irq0_timer_override, 1375 .ident = "HP NX6125 laptop", 1376 .matches = { 1377 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 1378 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6125"), 1379 }, 1380 }, 1381 { 1382 .callback = dmi_ignore_irq0_timer_override, 1383 .ident = "HP NX6325 laptop", 1384 .matches = { 1385 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 1386 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6325"), 1387 }, 1388 }, 1389 { 1390 .callback = dmi_ignore_irq0_timer_override, 1391 .ident = "HP 6715b laptop", 1392 .matches = { 1393 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 1394 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq 6715b"), 1395 }, 1396 }, 1397 { 1398 .callback = dmi_ignore_irq0_timer_override, 1399 .ident = "FUJITSU SIEMENS", 1400 .matches = { 1401 DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"), 1402 DMI_MATCH(DMI_PRODUCT_NAME, "AMILO PRO V2030"), 1403 }, 1404 }, 1405 {} 1406 }; 1407 1408 /* 1409 * acpi_boot_table_init() and acpi_boot_init() 1410 * called from setup_arch(), always. 1411 * 1. checksums all tables 1412 * 2. enumerates lapics 1413 * 3. enumerates io-apics 1414 * 1415 * acpi_table_init() is separate to allow reading SRAT without 1416 * other side effects. 1417 * 1418 * side effects of acpi_boot_init: 1419 * acpi_lapic = 1 if LAPIC found 1420 * acpi_ioapic = 1 if IOAPIC found 1421 * if (acpi_lapic && acpi_ioapic) smp_found_config = 1; 1422 * if acpi_blacklisted() acpi_disabled = 1; 1423 * acpi_irq_model=... 1424 * ... 1425 */ 1426 1427 void __init acpi_boot_table_init(void) 1428 { 1429 dmi_check_system(acpi_dmi_table); 1430 1431 /* 1432 * If acpi_disabled, bail out 1433 */ 1434 if (acpi_disabled) 1435 return; 1436 1437 /* 1438 * Initialize the ACPI boot-time table parser. 1439 */ 1440 if (acpi_table_init()) { 1441 disable_acpi(); 1442 return; 1443 } 1444 1445 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf); 1446 1447 /* 1448 * blacklist may disable ACPI entirely 1449 */ 1450 if (acpi_blacklisted()) { 1451 if (acpi_force) { 1452 printk(KERN_WARNING PREFIX "acpi=force override\n"); 1453 } else { 1454 printk(KERN_WARNING PREFIX "Disabling ACPI support\n"); 1455 disable_acpi(); 1456 return; 1457 } 1458 } 1459 } 1460 1461 int __init early_acpi_boot_init(void) 1462 { 1463 /* 1464 * If acpi_disabled, bail out 1465 */ 1466 if (acpi_disabled) 1467 return 1; 1468 1469 /* 1470 * Process the Multiple APIC Description Table (MADT), if present 1471 */ 1472 early_acpi_process_madt(); 1473 1474 return 0; 1475 } 1476 1477 int __init acpi_boot_init(void) 1478 { 1479 /* those are executed after early-quirks are executed */ 1480 dmi_check_system(acpi_dmi_table_late); 1481 1482 /* 1483 * If acpi_disabled, bail out 1484 */ 1485 if (acpi_disabled) 1486 return 1; 1487 1488 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf); 1489 1490 /* 1491 * set sci_int and PM timer address 1492 */ 1493 acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt); 1494 1495 /* 1496 * Process the Multiple APIC Description Table (MADT), if present 1497 */ 1498 acpi_process_madt(); 1499 1500 acpi_table_parse(ACPI_SIG_HPET, acpi_parse_hpet); 1501 1502 if (!acpi_noirq) 1503 x86_init.pci.init = pci_acpi_init; 1504 1505 return 0; 1506 } 1507 1508 static int __init parse_acpi(char *arg) 1509 { 1510 if (!arg) 1511 return -EINVAL; 1512 1513 /* "acpi=off" disables both ACPI table parsing and interpreter */ 1514 if (strcmp(arg, "off") == 0) { 1515 disable_acpi(); 1516 } 1517 /* acpi=force to over-ride black-list */ 1518 else if (strcmp(arg, "force") == 0) { 1519 acpi_force = 1; 1520 acpi_disabled = 0; 1521 } 1522 /* acpi=strict disables out-of-spec workarounds */ 1523 else if (strcmp(arg, "strict") == 0) { 1524 acpi_strict = 1; 1525 } 1526 /* acpi=rsdt use RSDT instead of XSDT */ 1527 else if (strcmp(arg, "rsdt") == 0) { 1528 acpi_gbl_do_not_use_xsdt = TRUE; 1529 } 1530 /* "acpi=noirq" disables ACPI interrupt routing */ 1531 else if (strcmp(arg, "noirq") == 0) { 1532 acpi_noirq_set(); 1533 } 1534 /* "acpi=copy_dsdt" copys DSDT */ 1535 else if (strcmp(arg, "copy_dsdt") == 0) { 1536 acpi_gbl_copy_dsdt_locally = 1; 1537 } 1538 /* "acpi=nocmcff" disables FF mode for corrected errors */ 1539 else if (strcmp(arg, "nocmcff") == 0) { 1540 acpi_disable_cmcff = 1; 1541 } else { 1542 /* Core will printk when we return error. */ 1543 return -EINVAL; 1544 } 1545 return 0; 1546 } 1547 early_param("acpi", parse_acpi); 1548 1549 /* FIXME: Using pci= for an ACPI parameter is a travesty. */ 1550 static int __init parse_pci(char *arg) 1551 { 1552 if (arg && strcmp(arg, "noacpi") == 0) 1553 acpi_disable_pci(); 1554 return 0; 1555 } 1556 early_param("pci", parse_pci); 1557 1558 int __init acpi_mps_check(void) 1559 { 1560 #if defined(CONFIG_X86_LOCAL_APIC) && !defined(CONFIG_X86_MPPARSE) 1561 /* mptable code is not built-in*/ 1562 if (acpi_disabled || acpi_noirq) { 1563 printk(KERN_WARNING "MPS support code is not built-in.\n" 1564 "Using acpi=off or acpi=noirq or pci=noacpi " 1565 "may have problem\n"); 1566 return 1; 1567 } 1568 #endif 1569 return 0; 1570 } 1571 1572 #ifdef CONFIG_X86_IO_APIC 1573 static int __init parse_acpi_skip_timer_override(char *arg) 1574 { 1575 acpi_skip_timer_override = 1; 1576 return 0; 1577 } 1578 early_param("acpi_skip_timer_override", parse_acpi_skip_timer_override); 1579 1580 static int __init parse_acpi_use_timer_override(char *arg) 1581 { 1582 acpi_use_timer_override = 1; 1583 return 0; 1584 } 1585 early_param("acpi_use_timer_override", parse_acpi_use_timer_override); 1586 #endif /* CONFIG_X86_IO_APIC */ 1587 1588 static int __init setup_acpi_sci(char *s) 1589 { 1590 if (!s) 1591 return -EINVAL; 1592 if (!strcmp(s, "edge")) 1593 acpi_sci_flags = ACPI_MADT_TRIGGER_EDGE | 1594 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK); 1595 else if (!strcmp(s, "level")) 1596 acpi_sci_flags = ACPI_MADT_TRIGGER_LEVEL | 1597 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK); 1598 else if (!strcmp(s, "high")) 1599 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_HIGH | 1600 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK); 1601 else if (!strcmp(s, "low")) 1602 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_LOW | 1603 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK); 1604 else 1605 return -EINVAL; 1606 return 0; 1607 } 1608 early_param("acpi_sci", setup_acpi_sci); 1609 1610 int __acpi_acquire_global_lock(unsigned int *lock) 1611 { 1612 unsigned int old, new, val; 1613 do { 1614 old = *lock; 1615 new = (((old & ~0x3) + 2) + ((old >> 1) & 0x1)); 1616 val = cmpxchg(lock, old, new); 1617 } while (unlikely (val != old)); 1618 return (new < 3) ? -1 : 0; 1619 } 1620 1621 int __acpi_release_global_lock(unsigned int *lock) 1622 { 1623 unsigned int old, new, val; 1624 do { 1625 old = *lock; 1626 new = old & ~0x3; 1627 val = cmpxchg(lock, old, new); 1628 } while (unlikely (val != old)); 1629 return old & 0x1; 1630 } 1631 1632 void __init arch_reserve_mem_area(acpi_physical_address addr, size_t size) 1633 { 1634 e820_add_region(addr, size, E820_ACPI); 1635 update_e820(); 1636 } 1637