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 */ 50static int __initdata acpi_force = 0; 51int acpi_disabled; 52EXPORT_SYMBOL(acpi_disabled); 53 54#ifdef CONFIG_X86_64 55# include <asm/proto.h> 56#endif /* X86 */ 57 58#define PREFIX "ACPI: " 59 60int acpi_noirq; /* skip ACPI IRQ initialization */ 61int acpi_pci_disabled; /* skip ACPI PCI scan and IRQ initialization */ 62EXPORT_SYMBOL(acpi_pci_disabled); 63 64int acpi_lapic; 65int acpi_ioapic; 66int acpi_strict; 67int acpi_disable_cmcff; 68 69u8 acpi_sci_flags __initdata; 70int acpi_sci_override_gsi __initdata; 71int acpi_skip_timer_override __initdata; 72int acpi_use_timer_override __initdata; 73int acpi_fix_pin2_polarity __initdata; 74 75#ifdef CONFIG_X86_LOCAL_APIC 76static u64 acpi_lapic_addr __initdata = APIC_DEFAULT_PHYS_BASE; 77#endif 78 79/* 80 * Locks related to IOAPIC hotplug 81 * Hotplug side: 82 * ->device_hotplug_lock 83 * ->acpi_ioapic_lock 84 * ->ioapic_lock 85 * Interrupt mapping side: 86 * ->acpi_ioapic_lock 87 * ->ioapic_mutex 88 * ->ioapic_lock 89 */ 90static DEFINE_MUTEX(acpi_ioapic_lock); 91 92/* -------------------------------------------------------------------------- 93 Boot-time Configuration 94 -------------------------------------------------------------------------- */ 95 96/* 97 * The default interrupt routing model is PIC (8259). This gets 98 * overridden if IOAPICs are enumerated (below). 99 */ 100enum acpi_irq_model_id acpi_irq_model = ACPI_IRQ_MODEL_PIC; 101 102 103/* 104 * ISA irqs by default are the first 16 gsis but can be 105 * any gsi as specified by an interrupt source override. 106 */ 107static u32 isa_irq_to_gsi[NR_IRQS_LEGACY] __read_mostly = { 108 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 109}; 110 111#define ACPI_INVALID_GSI INT_MIN 112 113/* 114 * This is just a simple wrapper around early_ioremap(), 115 * with sanity checks for phys == 0 and size == 0. 116 */ 117char *__init __acpi_map_table(unsigned long phys, unsigned long size) 118{ 119 120 if (!phys || !size) 121 return NULL; 122 123 return early_ioremap(phys, size); 124} 125 126void __init __acpi_unmap_table(char *map, unsigned long size) 127{ 128 if (!map || !size) 129 return; 130 131 early_iounmap(map, size); 132} 133 134#ifdef CONFIG_X86_LOCAL_APIC 135static int __init acpi_parse_madt(struct acpi_table_header *table) 136{ 137 struct acpi_table_madt *madt = NULL; 138 139 if (!cpu_has_apic) 140 return -EINVAL; 141 142 madt = (struct acpi_table_madt *)table; 143 if (!madt) { 144 printk(KERN_WARNING PREFIX "Unable to map MADT\n"); 145 return -ENODEV; 146 } 147 148 if (madt->address) { 149 acpi_lapic_addr = (u64) madt->address; 150 151 printk(KERN_DEBUG PREFIX "Local APIC address 0x%08x\n", 152 madt->address); 153 } 154 155 default_acpi_madt_oem_check(madt->header.oem_id, 156 madt->header.oem_table_id); 157 158 return 0; 159} 160 161/** 162 * acpi_register_lapic - register a local apic and generates a logic cpu number 163 * @id: local apic id to register 164 * @enabled: this cpu is enabled or not 165 * 166 * Returns the logic cpu number which maps to the local apic 167 */ 168static int acpi_register_lapic(int id, u8 enabled) 169{ 170 unsigned int ver = 0; 171 172 if (id >= MAX_LOCAL_APIC) { 173 printk(KERN_INFO PREFIX "skipped apicid that is too big\n"); 174 return -EINVAL; 175 } 176 177 if (!enabled) { 178 ++disabled_cpus; 179 return -EINVAL; 180 } 181 182 if (boot_cpu_physical_apicid != -1U) 183 ver = apic_version[boot_cpu_physical_apicid]; 184 185 return generic_processor_info(id, ver); 186} 187 188static int __init 189acpi_parse_x2apic(struct acpi_subtable_header *header, const unsigned long end) 190{ 191 struct acpi_madt_local_x2apic *processor = NULL; 192 int apic_id; 193 u8 enabled; 194 195 processor = (struct acpi_madt_local_x2apic *)header; 196 197 if (BAD_MADT_ENTRY(processor, end)) 198 return -EINVAL; 199 200 acpi_table_print_madt_entry(header); 201 202 apic_id = processor->local_apic_id; 203 enabled = processor->lapic_flags & ACPI_MADT_ENABLED; 204#ifdef CONFIG_X86_X2APIC 205 /* 206 * We need to register disabled CPU as well to permit 207 * counting disabled CPUs. This allows us to size 208 * cpus_possible_map more accurately, to permit 209 * to not preallocating memory for all NR_CPUS 210 * when we use CPU hotplug. 211 */ 212 if (!apic->apic_id_valid(apic_id) && enabled) 213 printk(KERN_WARNING PREFIX "x2apic entry ignored\n"); 214 else 215 acpi_register_lapic(apic_id, enabled); 216#else 217 printk(KERN_WARNING PREFIX "x2apic entry ignored\n"); 218#endif 219 220 return 0; 221} 222 223static int __init 224acpi_parse_lapic(struct acpi_subtable_header * header, const unsigned long end) 225{ 226 struct acpi_madt_local_apic *processor = NULL; 227 228 processor = (struct acpi_madt_local_apic *)header; 229 230 if (BAD_MADT_ENTRY(processor, end)) 231 return -EINVAL; 232 233 acpi_table_print_madt_entry(header); 234 235 /* 236 * We need to register disabled CPU as well to permit 237 * counting disabled CPUs. This allows us to size 238 * cpus_possible_map more accurately, to permit 239 * to not preallocating memory for all NR_CPUS 240 * when we use CPU hotplug. 241 */ 242 acpi_register_lapic(processor->id, /* APIC ID */ 243 processor->lapic_flags & ACPI_MADT_ENABLED); 244 245 return 0; 246} 247 248static int __init 249acpi_parse_sapic(struct acpi_subtable_header *header, const unsigned long end) 250{ 251 struct acpi_madt_local_sapic *processor = NULL; 252 253 processor = (struct acpi_madt_local_sapic *)header; 254 255 if (BAD_MADT_ENTRY(processor, end)) 256 return -EINVAL; 257 258 acpi_table_print_madt_entry(header); 259 260 acpi_register_lapic((processor->id << 8) | processor->eid,/* APIC ID */ 261 processor->lapic_flags & ACPI_MADT_ENABLED); 262 263 return 0; 264} 265 266static int __init 267acpi_parse_lapic_addr_ovr(struct acpi_subtable_header * header, 268 const unsigned long end) 269{ 270 struct acpi_madt_local_apic_override *lapic_addr_ovr = NULL; 271 272 lapic_addr_ovr = (struct acpi_madt_local_apic_override *)header; 273 274 if (BAD_MADT_ENTRY(lapic_addr_ovr, end)) 275 return -EINVAL; 276 277 acpi_lapic_addr = lapic_addr_ovr->address; 278 279 return 0; 280} 281 282static int __init 283acpi_parse_x2apic_nmi(struct acpi_subtable_header *header, 284 const unsigned long end) 285{ 286 struct acpi_madt_local_x2apic_nmi *x2apic_nmi = NULL; 287 288 x2apic_nmi = (struct acpi_madt_local_x2apic_nmi *)header; 289 290 if (BAD_MADT_ENTRY(x2apic_nmi, end)) 291 return -EINVAL; 292 293 acpi_table_print_madt_entry(header); 294 295 if (x2apic_nmi->lint != 1) 296 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n"); 297 298 return 0; 299} 300 301static int __init 302acpi_parse_lapic_nmi(struct acpi_subtable_header * header, const unsigned long end) 303{ 304 struct acpi_madt_local_apic_nmi *lapic_nmi = NULL; 305 306 lapic_nmi = (struct acpi_madt_local_apic_nmi *)header; 307 308 if (BAD_MADT_ENTRY(lapic_nmi, end)) 309 return -EINVAL; 310 311 acpi_table_print_madt_entry(header); 312 313 if (lapic_nmi->lint != 1) 314 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n"); 315 316 return 0; 317} 318 319#endif /*CONFIG_X86_LOCAL_APIC */ 320 321#ifdef CONFIG_X86_IO_APIC 322#define MP_ISA_BUS 0 323 324static void __init mp_override_legacy_irq(u8 bus_irq, u8 polarity, u8 trigger, 325 u32 gsi) 326{ 327 int ioapic; 328 int pin; 329 struct mpc_intsrc mp_irq; 330 331 /* 332 * Convert 'gsi' to 'ioapic.pin'. 333 */ 334 ioapic = mp_find_ioapic(gsi); 335 if (ioapic < 0) 336 return; 337 pin = mp_find_ioapic_pin(ioapic, gsi); 338 339 /* 340 * TBD: This check is for faulty timer entries, where the override 341 * erroneously sets the trigger to level, resulting in a HUGE 342 * increase of timer interrupts! 343 */ 344 if ((bus_irq == 0) && (trigger == 3)) 345 trigger = 1; 346 347 mp_irq.type = MP_INTSRC; 348 mp_irq.irqtype = mp_INT; 349 mp_irq.irqflag = (trigger << 2) | polarity; 350 mp_irq.srcbus = MP_ISA_BUS; 351 mp_irq.srcbusirq = bus_irq; /* IRQ */ 352 mp_irq.dstapic = mpc_ioapic_id(ioapic); /* APIC ID */ 353 mp_irq.dstirq = pin; /* INTIN# */ 354 355 mp_save_irq(&mp_irq); 356 357 /* 358 * Reset default identity mapping if gsi is also an legacy IRQ, 359 * otherwise there will be more than one entry with the same GSI 360 * and acpi_isa_irq_to_gsi() may give wrong result. 361 */ 362 if (gsi < nr_legacy_irqs() && isa_irq_to_gsi[gsi] == gsi) 363 isa_irq_to_gsi[gsi] = ACPI_INVALID_GSI; 364 isa_irq_to_gsi[bus_irq] = gsi; 365} 366 367static int mp_config_acpi_gsi(struct device *dev, u32 gsi, int trigger, 368 int polarity) 369{ 370#ifdef CONFIG_X86_MPPARSE 371 struct mpc_intsrc mp_irq; 372 struct pci_dev *pdev; 373 unsigned char number; 374 unsigned int devfn; 375 int ioapic; 376 u8 pin; 377 378 if (!acpi_ioapic) 379 return 0; 380 if (!dev || !dev_is_pci(dev)) 381 return 0; 382 383 pdev = to_pci_dev(dev); 384 number = pdev->bus->number; 385 devfn = pdev->devfn; 386 pin = pdev->pin; 387 /* print the entry should happen on mptable identically */ 388 mp_irq.type = MP_INTSRC; 389 mp_irq.irqtype = mp_INT; 390 mp_irq.irqflag = (trigger == ACPI_EDGE_SENSITIVE ? 4 : 0x0c) | 391 (polarity == ACPI_ACTIVE_HIGH ? 1 : 3); 392 mp_irq.srcbus = number; 393 mp_irq.srcbusirq = (((devfn >> 3) & 0x1f) << 2) | ((pin - 1) & 3); 394 ioapic = mp_find_ioapic(gsi); 395 mp_irq.dstapic = mpc_ioapic_id(ioapic); 396 mp_irq.dstirq = mp_find_ioapic_pin(ioapic, gsi); 397 398 mp_save_irq(&mp_irq); 399#endif 400 return 0; 401} 402 403static int mp_register_gsi(struct device *dev, u32 gsi, int trigger, 404 int polarity) 405{ 406 int irq, node; 407 408 if (acpi_irq_model != ACPI_IRQ_MODEL_IOAPIC) 409 return gsi; 410 411 trigger = trigger == ACPI_EDGE_SENSITIVE ? 0 : 1; 412 polarity = polarity == ACPI_ACTIVE_HIGH ? 0 : 1; 413 node = dev ? dev_to_node(dev) : NUMA_NO_NODE; 414 if (mp_set_gsi_attr(gsi, trigger, polarity, node)) { 415 pr_warn("Failed to set pin attr for GSI%d\n", gsi); 416 return -1; 417 } 418 419 irq = mp_map_gsi_to_irq(gsi, IOAPIC_MAP_ALLOC); 420 if (irq < 0) 421 return irq; 422 423 /* Don't set up the ACPI SCI because it's already set up */ 424 if (enable_update_mptable && acpi_gbl_FADT.sci_interrupt != gsi) 425 mp_config_acpi_gsi(dev, gsi, trigger, polarity); 426 427 return irq; 428} 429 430static void mp_unregister_gsi(u32 gsi) 431{ 432 int irq; 433 434 if (acpi_irq_model != ACPI_IRQ_MODEL_IOAPIC) 435 return; 436 437 irq = mp_map_gsi_to_irq(gsi, 0); 438 if (irq > 0) 439 mp_unmap_irq(irq); 440} 441 442static struct irq_domain_ops acpi_irqdomain_ops = { 443 .map = mp_irqdomain_map, 444 .unmap = mp_irqdomain_unmap, 445}; 446 447static int __init 448acpi_parse_ioapic(struct acpi_subtable_header * header, const unsigned long end) 449{ 450 struct acpi_madt_io_apic *ioapic = NULL; 451 struct ioapic_domain_cfg cfg = { 452 .type = IOAPIC_DOMAIN_DYNAMIC, 453 .ops = &acpi_irqdomain_ops, 454 }; 455 456 ioapic = (struct acpi_madt_io_apic *)header; 457 458 if (BAD_MADT_ENTRY(ioapic, end)) 459 return -EINVAL; 460 461 acpi_table_print_madt_entry(header); 462 463 /* Statically assign IRQ numbers for IOAPICs hosting legacy IRQs */ 464 if (ioapic->global_irq_base < nr_legacy_irqs()) 465 cfg.type = IOAPIC_DOMAIN_LEGACY; 466 467 mp_register_ioapic(ioapic->id, ioapic->address, ioapic->global_irq_base, 468 &cfg); 469 470 return 0; 471} 472 473/* 474 * Parse Interrupt Source Override for the ACPI SCI 475 */ 476static void __init acpi_sci_ioapic_setup(u8 bus_irq, u16 polarity, u16 trigger, u32 gsi) 477{ 478 if (trigger == 0) /* compatible SCI trigger is level */ 479 trigger = 3; 480 481 if (polarity == 0) /* compatible SCI polarity is low */ 482 polarity = 3; 483 484 /* Command-line over-ride via acpi_sci= */ 485 if (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) 486 trigger = (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2; 487 488 if (acpi_sci_flags & ACPI_MADT_POLARITY_MASK) 489 polarity = acpi_sci_flags & ACPI_MADT_POLARITY_MASK; 490 491 mp_override_legacy_irq(bus_irq, polarity, trigger, gsi); 492 acpi_penalize_sci_irq(bus_irq, trigger, polarity); 493 494 /* 495 * stash over-ride to indicate we've been here 496 * and for later update of acpi_gbl_FADT 497 */ 498 acpi_sci_override_gsi = gsi; 499 return; 500} 501 502static int __init 503acpi_parse_int_src_ovr(struct acpi_subtable_header * header, 504 const unsigned long end) 505{ 506 struct acpi_madt_interrupt_override *intsrc = NULL; 507 508 intsrc = (struct acpi_madt_interrupt_override *)header; 509 510 if (BAD_MADT_ENTRY(intsrc, end)) 511 return -EINVAL; 512 513 acpi_table_print_madt_entry(header); 514 515 if (intsrc->source_irq == acpi_gbl_FADT.sci_interrupt) { 516 acpi_sci_ioapic_setup(intsrc->source_irq, 517 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK, 518 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2, 519 intsrc->global_irq); 520 return 0; 521 } 522 523 if (intsrc->source_irq == 0) { 524 if (acpi_skip_timer_override) { 525 printk(PREFIX "BIOS IRQ0 override ignored.\n"); 526 return 0; 527 } 528 529 if ((intsrc->global_irq == 2) && acpi_fix_pin2_polarity 530 && (intsrc->inti_flags & ACPI_MADT_POLARITY_MASK)) { 531 intsrc->inti_flags &= ~ACPI_MADT_POLARITY_MASK; 532 printk(PREFIX "BIOS IRQ0 pin2 override: forcing polarity to high active.\n"); 533 } 534 } 535 536 mp_override_legacy_irq(intsrc->source_irq, 537 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK, 538 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2, 539 intsrc->global_irq); 540 541 return 0; 542} 543 544static int __init 545acpi_parse_nmi_src(struct acpi_subtable_header * header, const unsigned long end) 546{ 547 struct acpi_madt_nmi_source *nmi_src = NULL; 548 549 nmi_src = (struct acpi_madt_nmi_source *)header; 550 551 if (BAD_MADT_ENTRY(nmi_src, end)) 552 return -EINVAL; 553 554 acpi_table_print_madt_entry(header); 555 556 /* TBD: Support nimsrc entries? */ 557 558 return 0; 559} 560 561#endif /* CONFIG_X86_IO_APIC */ 562 563/* 564 * acpi_pic_sci_set_trigger() 565 * 566 * use ELCR to set PIC-mode trigger type for SCI 567 * 568 * If a PIC-mode SCI is not recognized or gives spurious IRQ7's 569 * it may require Edge Trigger -- use "acpi_sci=edge" 570 * 571 * Port 0x4d0-4d1 are ECLR1 and ECLR2, the Edge/Level Control Registers 572 * for the 8259 PIC. bit[n] = 1 means irq[n] is Level, otherwise Edge. 573 * ECLR1 is IRQs 0-7 (IRQ 0, 1, 2 must be 0) 574 * ECLR2 is IRQs 8-15 (IRQ 8, 13 must be 0) 575 */ 576 577void __init acpi_pic_sci_set_trigger(unsigned int irq, u16 trigger) 578{ 579 unsigned int mask = 1 << irq; 580 unsigned int old, new; 581 582 /* Real old ELCR mask */ 583 old = inb(0x4d0) | (inb(0x4d1) << 8); 584 585 /* 586 * If we use ACPI to set PCI IRQs, then we should clear ELCR 587 * since we will set it correctly as we enable the PCI irq 588 * routing. 589 */ 590 new = acpi_noirq ? old : 0; 591 592 /* 593 * Update SCI information in the ELCR, it isn't in the PCI 594 * routing tables.. 595 */ 596 switch (trigger) { 597 case 1: /* Edge - clear */ 598 new &= ~mask; 599 break; 600 case 3: /* Level - set */ 601 new |= mask; 602 break; 603 } 604 605 if (old == new) 606 return; 607 608 printk(PREFIX "setting ELCR to %04x (from %04x)\n", new, old); 609 outb(new, 0x4d0); 610 outb(new >> 8, 0x4d1); 611} 612 613int acpi_gsi_to_irq(u32 gsi, unsigned int *irqp) 614{ 615 int rc, irq, trigger, polarity; 616 617 if (acpi_irq_model == ACPI_IRQ_MODEL_PIC) { 618 *irqp = gsi; 619 return 0; 620 } 621 622 rc = acpi_get_override_irq(gsi, &trigger, &polarity); 623 if (rc == 0) { 624 trigger = trigger ? ACPI_LEVEL_SENSITIVE : ACPI_EDGE_SENSITIVE; 625 polarity = polarity ? ACPI_ACTIVE_LOW : ACPI_ACTIVE_HIGH; 626 irq = acpi_register_gsi(NULL, gsi, trigger, polarity); 627 if (irq >= 0) { 628 *irqp = irq; 629 return 0; 630 } 631 } 632 633 return -1; 634} 635EXPORT_SYMBOL_GPL(acpi_gsi_to_irq); 636 637int acpi_isa_irq_to_gsi(unsigned isa_irq, u32 *gsi) 638{ 639 if (isa_irq < nr_legacy_irqs() && 640 isa_irq_to_gsi[isa_irq] != ACPI_INVALID_GSI) { 641 *gsi = isa_irq_to_gsi[isa_irq]; 642 return 0; 643 } 644 645 return -1; 646} 647 648static int acpi_register_gsi_pic(struct device *dev, u32 gsi, 649 int trigger, int polarity) 650{ 651#ifdef CONFIG_PCI 652 /* 653 * Make sure all (legacy) PCI IRQs are set as level-triggered. 654 */ 655 if (trigger == ACPI_LEVEL_SENSITIVE) 656 eisa_set_level_irq(gsi); 657#endif 658 659 return gsi; 660} 661 662#ifdef CONFIG_X86_LOCAL_APIC 663static int acpi_register_gsi_ioapic(struct device *dev, u32 gsi, 664 int trigger, int polarity) 665{ 666 int irq = gsi; 667 668#ifdef CONFIG_X86_IO_APIC 669 mutex_lock(&acpi_ioapic_lock); 670 irq = mp_register_gsi(dev, gsi, trigger, polarity); 671 mutex_unlock(&acpi_ioapic_lock); 672#endif 673 674 return irq; 675} 676 677static void acpi_unregister_gsi_ioapic(u32 gsi) 678{ 679#ifdef CONFIG_X86_IO_APIC 680 mutex_lock(&acpi_ioapic_lock); 681 mp_unregister_gsi(gsi); 682 mutex_unlock(&acpi_ioapic_lock); 683#endif 684} 685#endif 686 687int (*__acpi_register_gsi)(struct device *dev, u32 gsi, 688 int trigger, int polarity) = acpi_register_gsi_pic; 689void (*__acpi_unregister_gsi)(u32 gsi) = NULL; 690 691#ifdef CONFIG_ACPI_SLEEP 692int (*acpi_suspend_lowlevel)(void) = x86_acpi_suspend_lowlevel; 693#else 694int (*acpi_suspend_lowlevel)(void); 695#endif 696 697/* 698 * success: return IRQ number (>=0) 699 * failure: return < 0 700 */ 701int acpi_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity) 702{ 703 return __acpi_register_gsi(dev, gsi, trigger, polarity); 704} 705EXPORT_SYMBOL_GPL(acpi_register_gsi); 706 707void acpi_unregister_gsi(u32 gsi) 708{ 709 if (__acpi_unregister_gsi) 710 __acpi_unregister_gsi(gsi); 711} 712EXPORT_SYMBOL_GPL(acpi_unregister_gsi); 713 714#ifdef CONFIG_X86_LOCAL_APIC 715static void __init acpi_set_irq_model_ioapic(void) 716{ 717 acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC; 718 __acpi_register_gsi = acpi_register_gsi_ioapic; 719 __acpi_unregister_gsi = acpi_unregister_gsi_ioapic; 720 acpi_ioapic = 1; 721} 722#endif 723 724/* 725 * ACPI based hotplug support for CPU 726 */ 727#ifdef CONFIG_ACPI_HOTPLUG_CPU 728#include <acpi/processor.h> 729 730static void acpi_map_cpu2node(acpi_handle handle, int cpu, int physid) 731{ 732#ifdef CONFIG_ACPI_NUMA 733 int nid; 734 735 nid = acpi_get_node(handle); 736 if (nid != -1) { 737 set_apicid_to_node(physid, nid); 738 numa_set_node(cpu, nid); 739 } 740#endif 741} 742 743static int _acpi_map_lsapic(acpi_handle handle, int physid, int *pcpu) 744{ 745 int cpu; 746 747 cpu = acpi_register_lapic(physid, ACPI_MADT_ENABLED); 748 if (cpu < 0) { 749 pr_info(PREFIX "Unable to map lapic to logical cpu number\n"); 750 return cpu; 751 } 752 753 acpi_processor_set_pdc(handle); 754 acpi_map_cpu2node(handle, cpu, physid); 755 756 *pcpu = cpu; 757 return 0; 758} 759 760/* wrapper to silence section mismatch warning */ 761int __ref acpi_map_cpu(acpi_handle handle, phys_cpuid_t physid, int *pcpu) 762{ 763 return _acpi_map_lsapic(handle, physid, pcpu); 764} 765EXPORT_SYMBOL(acpi_map_cpu); 766 767int acpi_unmap_cpu(int cpu) 768{ 769#ifdef CONFIG_ACPI_NUMA 770 set_apicid_to_node(per_cpu(x86_cpu_to_apicid, cpu), NUMA_NO_NODE); 771#endif 772 773 per_cpu(x86_cpu_to_apicid, cpu) = -1; 774 set_cpu_present(cpu, false); 775 num_processors--; 776 777 return (0); 778} 779EXPORT_SYMBOL(acpi_unmap_cpu); 780#endif /* CONFIG_ACPI_HOTPLUG_CPU */ 781 782int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base) 783{ 784 int ret = -ENOSYS; 785#ifdef CONFIG_ACPI_HOTPLUG_IOAPIC 786 int ioapic_id; 787 u64 addr; 788 struct ioapic_domain_cfg cfg = { 789 .type = IOAPIC_DOMAIN_DYNAMIC, 790 .ops = &acpi_irqdomain_ops, 791 }; 792 793 ioapic_id = acpi_get_ioapic_id(handle, gsi_base, &addr); 794 if (ioapic_id < 0) { 795 unsigned long long uid; 796 acpi_status status; 797 798 status = acpi_evaluate_integer(handle, METHOD_NAME__UID, 799 NULL, &uid); 800 if (ACPI_FAILURE(status)) { 801 acpi_handle_warn(handle, "failed to get IOAPIC ID.\n"); 802 return -EINVAL; 803 } 804 ioapic_id = (int)uid; 805 } 806 807 mutex_lock(&acpi_ioapic_lock); 808 ret = mp_register_ioapic(ioapic_id, phys_addr, gsi_base, &cfg); 809 mutex_unlock(&acpi_ioapic_lock); 810#endif 811 812 return ret; 813} 814EXPORT_SYMBOL(acpi_register_ioapic); 815 816int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base) 817{ 818 int ret = -ENOSYS; 819 820#ifdef CONFIG_ACPI_HOTPLUG_IOAPIC 821 mutex_lock(&acpi_ioapic_lock); 822 ret = mp_unregister_ioapic(gsi_base); 823 mutex_unlock(&acpi_ioapic_lock); 824#endif 825 826 return ret; 827} 828EXPORT_SYMBOL(acpi_unregister_ioapic); 829 830/** 831 * acpi_ioapic_registered - Check whether IOAPIC assoicatied with @gsi_base 832 * has been registered 833 * @handle: ACPI handle of the IOAPIC deivce 834 * @gsi_base: GSI base associated with the IOAPIC 835 * 836 * Assume caller holds some type of lock to serialize acpi_ioapic_registered() 837 * with acpi_register_ioapic()/acpi_unregister_ioapic(). 838 */ 839int acpi_ioapic_registered(acpi_handle handle, u32 gsi_base) 840{ 841 int ret = 0; 842 843#ifdef CONFIG_ACPI_HOTPLUG_IOAPIC 844 mutex_lock(&acpi_ioapic_lock); 845 ret = mp_ioapic_registered(gsi_base); 846 mutex_unlock(&acpi_ioapic_lock); 847#endif 848 849 return ret; 850} 851 852static int __init acpi_parse_sbf(struct acpi_table_header *table) 853{ 854 struct acpi_table_boot *sb = (struct acpi_table_boot *)table; 855 856 sbf_port = sb->cmos_index; /* Save CMOS port */ 857 858 return 0; 859} 860 861#ifdef CONFIG_HPET_TIMER 862#include <asm/hpet.h> 863 864static struct resource *hpet_res __initdata; 865 866static int __init acpi_parse_hpet(struct acpi_table_header *table) 867{ 868 struct acpi_table_hpet *hpet_tbl = (struct acpi_table_hpet *)table; 869 870 if (hpet_tbl->address.space_id != ACPI_SPACE_MEM) { 871 printk(KERN_WARNING PREFIX "HPET timers must be located in " 872 "memory.\n"); 873 return -1; 874 } 875 876 hpet_address = hpet_tbl->address.address; 877 hpet_blockid = hpet_tbl->sequence; 878 879 /* 880 * Some broken BIOSes advertise HPET at 0x0. We really do not 881 * want to allocate a resource there. 882 */ 883 if (!hpet_address) { 884 printk(KERN_WARNING PREFIX 885 "HPET id: %#x base: %#lx is invalid\n", 886 hpet_tbl->id, hpet_address); 887 return 0; 888 } 889#ifdef CONFIG_X86_64 890 /* 891 * Some even more broken BIOSes advertise HPET at 892 * 0xfed0000000000000 instead of 0xfed00000. Fix it up and add 893 * some noise: 894 */ 895 if (hpet_address == 0xfed0000000000000UL) { 896 if (!hpet_force_user) { 897 printk(KERN_WARNING PREFIX "HPET id: %#x " 898 "base: 0xfed0000000000000 is bogus\n " 899 "try hpet=force on the kernel command line to " 900 "fix it up to 0xfed00000.\n", hpet_tbl->id); 901 hpet_address = 0; 902 return 0; 903 } 904 printk(KERN_WARNING PREFIX 905 "HPET id: %#x base: 0xfed0000000000000 fixed up " 906 "to 0xfed00000.\n", hpet_tbl->id); 907 hpet_address >>= 32; 908 } 909#endif 910 printk(KERN_INFO PREFIX "HPET id: %#x base: %#lx\n", 911 hpet_tbl->id, hpet_address); 912 913 /* 914 * Allocate and initialize the HPET firmware resource for adding into 915 * the resource tree during the lateinit timeframe. 916 */ 917#define HPET_RESOURCE_NAME_SIZE 9 918 hpet_res = alloc_bootmem(sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE); 919 920 hpet_res->name = (void *)&hpet_res[1]; 921 hpet_res->flags = IORESOURCE_MEM; 922 snprintf((char *)hpet_res->name, HPET_RESOURCE_NAME_SIZE, "HPET %u", 923 hpet_tbl->sequence); 924 925 hpet_res->start = hpet_address; 926 hpet_res->end = hpet_address + (1 * 1024) - 1; 927 928 return 0; 929} 930 931/* 932 * hpet_insert_resource inserts the HPET resources used into the resource 933 * tree. 934 */ 935static __init int hpet_insert_resource(void) 936{ 937 if (!hpet_res) 938 return 1; 939 940 return insert_resource(&iomem_resource, hpet_res); 941} 942 943late_initcall(hpet_insert_resource); 944 945#else 946#define acpi_parse_hpet NULL 947#endif 948 949static int __init acpi_parse_fadt(struct acpi_table_header *table) 950{ 951 952#ifdef CONFIG_X86_PM_TIMER 953 /* detect the location of the ACPI PM Timer */ 954 if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID) { 955 /* FADT rev. 2 */ 956 if (acpi_gbl_FADT.xpm_timer_block.space_id != 957 ACPI_ADR_SPACE_SYSTEM_IO) 958 return 0; 959 960 pmtmr_ioport = acpi_gbl_FADT.xpm_timer_block.address; 961 /* 962 * "X" fields are optional extensions to the original V1.0 963 * fields, so we must selectively expand V1.0 fields if the 964 * corresponding X field is zero. 965 */ 966 if (!pmtmr_ioport) 967 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block; 968 } else { 969 /* FADT rev. 1 */ 970 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block; 971 } 972 if (pmtmr_ioport) 973 printk(KERN_INFO PREFIX "PM-Timer IO Port: %#x\n", 974 pmtmr_ioport); 975#endif 976 return 0; 977} 978 979#ifdef CONFIG_X86_LOCAL_APIC 980/* 981 * Parse LAPIC entries in MADT 982 * returns 0 on success, < 0 on error 983 */ 984 985static int __init early_acpi_parse_madt_lapic_addr_ovr(void) 986{ 987 int count; 988 989 if (!cpu_has_apic) 990 return -ENODEV; 991 992 /* 993 * Note that the LAPIC address is obtained from the MADT (32-bit value) 994 * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value). 995 */ 996 997 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE, 998 acpi_parse_lapic_addr_ovr, 0); 999 if (count < 0) { 1000 printk(KERN_ERR PREFIX 1001 "Error parsing LAPIC address override entry\n"); 1002 return count; 1003 } 1004 1005 register_lapic_address(acpi_lapic_addr); 1006 1007 return count; 1008} 1009 1010static int __init acpi_parse_madt_lapic_entries(void) 1011{ 1012 int count; 1013 int x2count = 0; 1014 1015 if (!cpu_has_apic) 1016 return -ENODEV; 1017 1018 /* 1019 * Note that the LAPIC address is obtained from the MADT (32-bit value) 1020 * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value). 1021 */ 1022 1023 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE, 1024 acpi_parse_lapic_addr_ovr, 0); 1025 if (count < 0) { 1026 printk(KERN_ERR PREFIX 1027 "Error parsing LAPIC address override entry\n"); 1028 return count; 1029 } 1030 1031 register_lapic_address(acpi_lapic_addr); 1032 1033 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC, 1034 acpi_parse_sapic, MAX_LOCAL_APIC); 1035 1036 if (!count) { 1037 x2count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC, 1038 acpi_parse_x2apic, MAX_LOCAL_APIC); 1039 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC, 1040 acpi_parse_lapic, MAX_LOCAL_APIC); 1041 } 1042 if (!count && !x2count) { 1043 printk(KERN_ERR PREFIX "No LAPIC entries present\n"); 1044 /* TBD: Cleanup to allow fallback to MPS */ 1045 return -ENODEV; 1046 } else if (count < 0 || x2count < 0) { 1047 printk(KERN_ERR PREFIX "Error parsing LAPIC entry\n"); 1048 /* TBD: Cleanup to allow fallback to MPS */ 1049 return count; 1050 } 1051 1052 x2count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC_NMI, 1053 acpi_parse_x2apic_nmi, 0); 1054 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI, 1055 acpi_parse_lapic_nmi, 0); 1056 if (count < 0 || x2count < 0) { 1057 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n"); 1058 /* TBD: Cleanup to allow fallback to MPS */ 1059 return count; 1060 } 1061 return 0; 1062} 1063#endif /* CONFIG_X86_LOCAL_APIC */ 1064 1065#ifdef CONFIG_X86_IO_APIC 1066static void __init mp_config_acpi_legacy_irqs(void) 1067{ 1068 int i; 1069 struct mpc_intsrc mp_irq; 1070 1071#ifdef CONFIG_EISA 1072 /* 1073 * Fabricate the legacy ISA bus (bus #31). 1074 */ 1075 mp_bus_id_to_type[MP_ISA_BUS] = MP_BUS_ISA; 1076#endif 1077 set_bit(MP_ISA_BUS, mp_bus_not_pci); 1078 pr_debug("Bus #%d is ISA\n", MP_ISA_BUS); 1079 1080 /* 1081 * Use the default configuration for the IRQs 0-15. Unless 1082 * overridden by (MADT) interrupt source override entries. 1083 */ 1084 for (i = 0; i < nr_legacy_irqs(); i++) { 1085 int ioapic, pin; 1086 unsigned int dstapic; 1087 int idx; 1088 u32 gsi; 1089 1090 /* Locate the gsi that irq i maps to. */ 1091 if (acpi_isa_irq_to_gsi(i, &gsi)) 1092 continue; 1093 1094 /* 1095 * Locate the IOAPIC that manages the ISA IRQ. 1096 */ 1097 ioapic = mp_find_ioapic(gsi); 1098 if (ioapic < 0) 1099 continue; 1100 pin = mp_find_ioapic_pin(ioapic, gsi); 1101 dstapic = mpc_ioapic_id(ioapic); 1102 1103 for (idx = 0; idx < mp_irq_entries; idx++) { 1104 struct mpc_intsrc *irq = mp_irqs + idx; 1105 1106 /* Do we already have a mapping for this ISA IRQ? */ 1107 if (irq->srcbus == MP_ISA_BUS && irq->srcbusirq == i) 1108 break; 1109 1110 /* Do we already have a mapping for this IOAPIC pin */ 1111 if (irq->dstapic == dstapic && irq->dstirq == pin) 1112 break; 1113 } 1114 1115 if (idx != mp_irq_entries) { 1116 printk(KERN_DEBUG "ACPI: IRQ%d used by override.\n", i); 1117 continue; /* IRQ already used */ 1118 } 1119 1120 mp_irq.type = MP_INTSRC; 1121 mp_irq.irqflag = 0; /* Conforming */ 1122 mp_irq.srcbus = MP_ISA_BUS; 1123 mp_irq.dstapic = dstapic; 1124 mp_irq.irqtype = mp_INT; 1125 mp_irq.srcbusirq = i; /* Identity mapped */ 1126 mp_irq.dstirq = pin; 1127 1128 mp_save_irq(&mp_irq); 1129 } 1130} 1131 1132/* 1133 * Parse IOAPIC related entries in MADT 1134 * returns 0 on success, < 0 on error 1135 */ 1136static int __init acpi_parse_madt_ioapic_entries(void) 1137{ 1138 int count; 1139 1140 /* 1141 * ACPI interpreter is required to complete interrupt setup, 1142 * so if it is off, don't enumerate the io-apics with ACPI. 1143 * If MPS is present, it will handle them, 1144 * otherwise the system will stay in PIC mode 1145 */ 1146 if (acpi_disabled || acpi_noirq) 1147 return -ENODEV; 1148 1149 if (!cpu_has_apic) 1150 return -ENODEV; 1151 1152 /* 1153 * if "noapic" boot option, don't look for IO-APICs 1154 */ 1155 if (skip_ioapic_setup) { 1156 printk(KERN_INFO PREFIX "Skipping IOAPIC probe " 1157 "due to 'noapic' option.\n"); 1158 return -ENODEV; 1159 } 1160 1161 count = acpi_table_parse_madt(ACPI_MADT_TYPE_IO_APIC, acpi_parse_ioapic, 1162 MAX_IO_APICS); 1163 if (!count) { 1164 printk(KERN_ERR PREFIX "No IOAPIC entries present\n"); 1165 return -ENODEV; 1166 } else if (count < 0) { 1167 printk(KERN_ERR PREFIX "Error parsing IOAPIC entry\n"); 1168 return count; 1169 } 1170 1171 count = acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE, 1172 acpi_parse_int_src_ovr, nr_irqs); 1173 if (count < 0) { 1174 printk(KERN_ERR PREFIX 1175 "Error parsing interrupt source overrides entry\n"); 1176 /* TBD: Cleanup to allow fallback to MPS */ 1177 return count; 1178 } 1179 1180 /* 1181 * If BIOS did not supply an INT_SRC_OVR for the SCI 1182 * pretend we got one so we can set the SCI flags. 1183 */ 1184 if (!acpi_sci_override_gsi) 1185 acpi_sci_ioapic_setup(acpi_gbl_FADT.sci_interrupt, 0, 0, 1186 acpi_gbl_FADT.sci_interrupt); 1187 1188 /* Fill in identity legacy mappings where no override */ 1189 mp_config_acpi_legacy_irqs(); 1190 1191 count = acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE, 1192 acpi_parse_nmi_src, nr_irqs); 1193 if (count < 0) { 1194 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n"); 1195 /* TBD: Cleanup to allow fallback to MPS */ 1196 return count; 1197 } 1198 1199 return 0; 1200} 1201#else 1202static inline int acpi_parse_madt_ioapic_entries(void) 1203{ 1204 return -1; 1205} 1206#endif /* !CONFIG_X86_IO_APIC */ 1207 1208static void __init early_acpi_process_madt(void) 1209{ 1210#ifdef CONFIG_X86_LOCAL_APIC 1211 int error; 1212 1213 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) { 1214 1215 /* 1216 * Parse MADT LAPIC entries 1217 */ 1218 error = early_acpi_parse_madt_lapic_addr_ovr(); 1219 if (!error) { 1220 acpi_lapic = 1; 1221 smp_found_config = 1; 1222 } 1223 if (error == -EINVAL) { 1224 /* 1225 * Dell Precision Workstation 410, 610 come here. 1226 */ 1227 printk(KERN_ERR PREFIX 1228 "Invalid BIOS MADT, disabling ACPI\n"); 1229 disable_acpi(); 1230 } 1231 } 1232#endif 1233} 1234 1235static void __init acpi_process_madt(void) 1236{ 1237#ifdef CONFIG_X86_LOCAL_APIC 1238 int error; 1239 1240 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) { 1241 1242 /* 1243 * Parse MADT LAPIC entries 1244 */ 1245 error = acpi_parse_madt_lapic_entries(); 1246 if (!error) { 1247 acpi_lapic = 1; 1248 1249 /* 1250 * Parse MADT IO-APIC entries 1251 */ 1252 mutex_lock(&acpi_ioapic_lock); 1253 error = acpi_parse_madt_ioapic_entries(); 1254 mutex_unlock(&acpi_ioapic_lock); 1255 if (!error) { 1256 acpi_set_irq_model_ioapic(); 1257 1258 smp_found_config = 1; 1259 } 1260 } 1261 if (error == -EINVAL) { 1262 /* 1263 * Dell Precision Workstation 410, 610 come here. 1264 */ 1265 printk(KERN_ERR PREFIX 1266 "Invalid BIOS MADT, disabling ACPI\n"); 1267 disable_acpi(); 1268 } 1269 } else { 1270 /* 1271 * ACPI found no MADT, and so ACPI wants UP PIC mode. 1272 * In the event an MPS table was found, forget it. 1273 * Boot with "acpi=off" to use MPS on such a system. 1274 */ 1275 if (smp_found_config) { 1276 printk(KERN_WARNING PREFIX 1277 "No APIC-table, disabling MPS\n"); 1278 smp_found_config = 0; 1279 } 1280 } 1281 1282 /* 1283 * ACPI supports both logical (e.g. Hyper-Threading) and physical 1284 * processors, where MPS only supports physical. 1285 */ 1286 if (acpi_lapic && acpi_ioapic) 1287 printk(KERN_INFO "Using ACPI (MADT) for SMP configuration " 1288 "information\n"); 1289 else if (acpi_lapic) 1290 printk(KERN_INFO "Using ACPI for processor (LAPIC) " 1291 "configuration information\n"); 1292#endif 1293 return; 1294} 1295 1296static int __init disable_acpi_irq(const struct dmi_system_id *d) 1297{ 1298 if (!acpi_force) { 1299 printk(KERN_NOTICE "%s detected: force use of acpi=noirq\n", 1300 d->ident); 1301 acpi_noirq_set(); 1302 } 1303 return 0; 1304} 1305 1306static int __init disable_acpi_pci(const struct dmi_system_id *d) 1307{ 1308 if (!acpi_force) { 1309 printk(KERN_NOTICE "%s detected: force use of pci=noacpi\n", 1310 d->ident); 1311 acpi_disable_pci(); 1312 } 1313 return 0; 1314} 1315 1316static int __init dmi_disable_acpi(const struct dmi_system_id *d) 1317{ 1318 if (!acpi_force) { 1319 printk(KERN_NOTICE "%s detected: acpi off\n", d->ident); 1320 disable_acpi(); 1321 } else { 1322 printk(KERN_NOTICE 1323 "Warning: DMI blacklist says broken, but acpi forced\n"); 1324 } 1325 return 0; 1326} 1327 1328/* 1329 * Force ignoring BIOS IRQ0 override 1330 */ 1331static int __init dmi_ignore_irq0_timer_override(const struct dmi_system_id *d) 1332{ 1333 if (!acpi_skip_timer_override) { 1334 pr_notice("%s detected: Ignoring BIOS IRQ0 override\n", 1335 d->ident); 1336 acpi_skip_timer_override = 1; 1337 } 1338 return 0; 1339} 1340 1341/* 1342 * ACPI offers an alternative platform interface model that removes 1343 * ACPI hardware requirements for platforms that do not implement 1344 * the PC Architecture. 1345 * 1346 * We initialize the Hardware-reduced ACPI model here: 1347 */ 1348static void __init acpi_reduced_hw_init(void) 1349{ 1350 if (acpi_gbl_reduced_hardware) { 1351 /* 1352 * Override x86_init functions and bypass legacy pic 1353 * in Hardware-reduced ACPI mode 1354 */ 1355 x86_init.timers.timer_init = x86_init_noop; 1356 x86_init.irqs.pre_vector_init = x86_init_noop; 1357 legacy_pic = &null_legacy_pic; 1358 } 1359} 1360 1361/* 1362 * If your system is blacklisted here, but you find that acpi=force 1363 * works for you, please contact linux-acpi@vger.kernel.org 1364 */ 1365static struct dmi_system_id __initdata acpi_dmi_table[] = { 1366 /* 1367 * Boxes that need ACPI disabled 1368 */ 1369 { 1370 .callback = dmi_disable_acpi, 1371 .ident = "IBM Thinkpad", 1372 .matches = { 1373 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), 1374 DMI_MATCH(DMI_BOARD_NAME, "2629H1G"), 1375 }, 1376 }, 1377 1378 /* 1379 * Boxes that need ACPI PCI IRQ routing disabled 1380 */ 1381 { 1382 .callback = disable_acpi_irq, 1383 .ident = "ASUS A7V", 1384 .matches = { 1385 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC"), 1386 DMI_MATCH(DMI_BOARD_NAME, "<A7V>"), 1387 /* newer BIOS, Revision 1011, does work */ 1388 DMI_MATCH(DMI_BIOS_VERSION, 1389 "ASUS A7V ACPI BIOS Revision 1007"), 1390 }, 1391 }, 1392 { 1393 /* 1394 * Latest BIOS for IBM 600E (1.16) has bad pcinum 1395 * for LPC bridge, which is needed for the PCI 1396 * interrupt links to work. DSDT fix is in bug 5966. 1397 * 2645, 2646 model numbers are shared with 600/600E/600X 1398 */ 1399 .callback = disable_acpi_irq, 1400 .ident = "IBM Thinkpad 600 Series 2645", 1401 .matches = { 1402 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), 1403 DMI_MATCH(DMI_BOARD_NAME, "2645"), 1404 }, 1405 }, 1406 { 1407 .callback = disable_acpi_irq, 1408 .ident = "IBM Thinkpad 600 Series 2646", 1409 .matches = { 1410 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), 1411 DMI_MATCH(DMI_BOARD_NAME, "2646"), 1412 }, 1413 }, 1414 /* 1415 * Boxes that need ACPI PCI IRQ routing and PCI scan disabled 1416 */ 1417 { /* _BBN 0 bug */ 1418 .callback = disable_acpi_pci, 1419 .ident = "ASUS PR-DLS", 1420 .matches = { 1421 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."), 1422 DMI_MATCH(DMI_BOARD_NAME, "PR-DLS"), 1423 DMI_MATCH(DMI_BIOS_VERSION, 1424 "ASUS PR-DLS ACPI BIOS Revision 1010"), 1425 DMI_MATCH(DMI_BIOS_DATE, "03/21/2003") 1426 }, 1427 }, 1428 { 1429 .callback = disable_acpi_pci, 1430 .ident = "Acer TravelMate 36x Laptop", 1431 .matches = { 1432 DMI_MATCH(DMI_SYS_VENDOR, "Acer"), 1433 DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"), 1434 }, 1435 }, 1436 {} 1437}; 1438 1439/* second table for DMI checks that should run after early-quirks */ 1440static struct dmi_system_id __initdata acpi_dmi_table_late[] = { 1441 /* 1442 * HP laptops which use a DSDT reporting as HP/SB400/10000, 1443 * which includes some code which overrides all temperature 1444 * trip points to 16C if the INTIN2 input of the I/O APIC 1445 * is enabled. This input is incorrectly designated the 1446 * ISA IRQ 0 via an interrupt source override even though 1447 * it is wired to the output of the master 8259A and INTIN0 1448 * is not connected at all. Force ignoring BIOS IRQ0 1449 * override in that cases. 1450 */ 1451 { 1452 .callback = dmi_ignore_irq0_timer_override, 1453 .ident = "HP nx6115 laptop", 1454 .matches = { 1455 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 1456 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6115"), 1457 }, 1458 }, 1459 { 1460 .callback = dmi_ignore_irq0_timer_override, 1461 .ident = "HP NX6125 laptop", 1462 .matches = { 1463 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 1464 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6125"), 1465 }, 1466 }, 1467 { 1468 .callback = dmi_ignore_irq0_timer_override, 1469 .ident = "HP NX6325 laptop", 1470 .matches = { 1471 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 1472 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6325"), 1473 }, 1474 }, 1475 { 1476 .callback = dmi_ignore_irq0_timer_override, 1477 .ident = "HP 6715b laptop", 1478 .matches = { 1479 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 1480 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq 6715b"), 1481 }, 1482 }, 1483 { 1484 .callback = dmi_ignore_irq0_timer_override, 1485 .ident = "FUJITSU SIEMENS", 1486 .matches = { 1487 DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"), 1488 DMI_MATCH(DMI_PRODUCT_NAME, "AMILO PRO V2030"), 1489 }, 1490 }, 1491 {} 1492}; 1493 1494/* 1495 * acpi_boot_table_init() and acpi_boot_init() 1496 * called from setup_arch(), always. 1497 * 1. checksums all tables 1498 * 2. enumerates lapics 1499 * 3. enumerates io-apics 1500 * 1501 * acpi_table_init() is separate to allow reading SRAT without 1502 * other side effects. 1503 * 1504 * side effects of acpi_boot_init: 1505 * acpi_lapic = 1 if LAPIC found 1506 * acpi_ioapic = 1 if IOAPIC found 1507 * if (acpi_lapic && acpi_ioapic) smp_found_config = 1; 1508 * if acpi_blacklisted() acpi_disabled = 1; 1509 * acpi_irq_model=... 1510 * ... 1511 */ 1512 1513void __init acpi_boot_table_init(void) 1514{ 1515 dmi_check_system(acpi_dmi_table); 1516 1517 /* 1518 * If acpi_disabled, bail out 1519 */ 1520 if (acpi_disabled) 1521 return; 1522 1523 /* 1524 * Initialize the ACPI boot-time table parser. 1525 */ 1526 if (acpi_table_init()) { 1527 disable_acpi(); 1528 return; 1529 } 1530 1531 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf); 1532 1533 /* 1534 * blacklist may disable ACPI entirely 1535 */ 1536 if (acpi_blacklisted()) { 1537 if (acpi_force) { 1538 printk(KERN_WARNING PREFIX "acpi=force override\n"); 1539 } else { 1540 printk(KERN_WARNING PREFIX "Disabling ACPI support\n"); 1541 disable_acpi(); 1542 return; 1543 } 1544 } 1545} 1546 1547int __init early_acpi_boot_init(void) 1548{ 1549 /* 1550 * If acpi_disabled, bail out 1551 */ 1552 if (acpi_disabled) 1553 return 1; 1554 1555 /* 1556 * Process the Multiple APIC Description Table (MADT), if present 1557 */ 1558 early_acpi_process_madt(); 1559 1560 /* 1561 * Hardware-reduced ACPI mode initialization: 1562 */ 1563 acpi_reduced_hw_init(); 1564 1565 return 0; 1566} 1567 1568int __init acpi_boot_init(void) 1569{ 1570 /* those are executed after early-quirks are executed */ 1571 dmi_check_system(acpi_dmi_table_late); 1572 1573 /* 1574 * If acpi_disabled, bail out 1575 */ 1576 if (acpi_disabled) 1577 return 1; 1578 1579 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf); 1580 1581 /* 1582 * set sci_int and PM timer address 1583 */ 1584 acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt); 1585 1586 /* 1587 * Process the Multiple APIC Description Table (MADT), if present 1588 */ 1589 acpi_process_madt(); 1590 1591 acpi_table_parse(ACPI_SIG_HPET, acpi_parse_hpet); 1592 1593 if (!acpi_noirq) 1594 x86_init.pci.init = pci_acpi_init; 1595 1596 return 0; 1597} 1598 1599static int __init parse_acpi(char *arg) 1600{ 1601 if (!arg) 1602 return -EINVAL; 1603 1604 /* "acpi=off" disables both ACPI table parsing and interpreter */ 1605 if (strcmp(arg, "off") == 0) { 1606 disable_acpi(); 1607 } 1608 /* acpi=force to over-ride black-list */ 1609 else if (strcmp(arg, "force") == 0) { 1610 acpi_force = 1; 1611 acpi_disabled = 0; 1612 } 1613 /* acpi=strict disables out-of-spec workarounds */ 1614 else if (strcmp(arg, "strict") == 0) { 1615 acpi_strict = 1; 1616 } 1617 /* acpi=rsdt use RSDT instead of XSDT */ 1618 else if (strcmp(arg, "rsdt") == 0) { 1619 acpi_gbl_do_not_use_xsdt = TRUE; 1620 } 1621 /* "acpi=noirq" disables ACPI interrupt routing */ 1622 else if (strcmp(arg, "noirq") == 0) { 1623 acpi_noirq_set(); 1624 } 1625 /* "acpi=copy_dsdt" copys DSDT */ 1626 else if (strcmp(arg, "copy_dsdt") == 0) { 1627 acpi_gbl_copy_dsdt_locally = 1; 1628 } 1629 /* "acpi=nocmcff" disables FF mode for corrected errors */ 1630 else if (strcmp(arg, "nocmcff") == 0) { 1631 acpi_disable_cmcff = 1; 1632 } else { 1633 /* Core will printk when we return error. */ 1634 return -EINVAL; 1635 } 1636 return 0; 1637} 1638early_param("acpi", parse_acpi); 1639 1640/* FIXME: Using pci= for an ACPI parameter is a travesty. */ 1641static int __init parse_pci(char *arg) 1642{ 1643 if (arg && strcmp(arg, "noacpi") == 0) 1644 acpi_disable_pci(); 1645 return 0; 1646} 1647early_param("pci", parse_pci); 1648 1649int __init acpi_mps_check(void) 1650{ 1651#if defined(CONFIG_X86_LOCAL_APIC) && !defined(CONFIG_X86_MPPARSE) 1652/* mptable code is not built-in*/ 1653 if (acpi_disabled || acpi_noirq) { 1654 printk(KERN_WARNING "MPS support code is not built-in.\n" 1655 "Using acpi=off or acpi=noirq or pci=noacpi " 1656 "may have problem\n"); 1657 return 1; 1658 } 1659#endif 1660 return 0; 1661} 1662 1663#ifdef CONFIG_X86_IO_APIC 1664static int __init parse_acpi_skip_timer_override(char *arg) 1665{ 1666 acpi_skip_timer_override = 1; 1667 return 0; 1668} 1669early_param("acpi_skip_timer_override", parse_acpi_skip_timer_override); 1670 1671static int __init parse_acpi_use_timer_override(char *arg) 1672{ 1673 acpi_use_timer_override = 1; 1674 return 0; 1675} 1676early_param("acpi_use_timer_override", parse_acpi_use_timer_override); 1677#endif /* CONFIG_X86_IO_APIC */ 1678 1679static int __init setup_acpi_sci(char *s) 1680{ 1681 if (!s) 1682 return -EINVAL; 1683 if (!strcmp(s, "edge")) 1684 acpi_sci_flags = ACPI_MADT_TRIGGER_EDGE | 1685 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK); 1686 else if (!strcmp(s, "level")) 1687 acpi_sci_flags = ACPI_MADT_TRIGGER_LEVEL | 1688 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK); 1689 else if (!strcmp(s, "high")) 1690 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_HIGH | 1691 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK); 1692 else if (!strcmp(s, "low")) 1693 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_LOW | 1694 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK); 1695 else 1696 return -EINVAL; 1697 return 0; 1698} 1699early_param("acpi_sci", setup_acpi_sci); 1700 1701int __acpi_acquire_global_lock(unsigned int *lock) 1702{ 1703 unsigned int old, new, val; 1704 do { 1705 old = *lock; 1706 new = (((old & ~0x3) + 2) + ((old >> 1) & 0x1)); 1707 val = cmpxchg(lock, old, new); 1708 } while (unlikely (val != old)); 1709 return (new < 3) ? -1 : 0; 1710} 1711 1712int __acpi_release_global_lock(unsigned int *lock) 1713{ 1714 unsigned int old, new, val; 1715 do { 1716 old = *lock; 1717 new = old & ~0x3; 1718 val = cmpxchg(lock, old, new); 1719 } while (unlikely (val != old)); 1720 return old & 0x1; 1721} 1722 1723void __init arch_reserve_mem_area(acpi_physical_address addr, size_t size) 1724{ 1725 e820_add_region(addr, size, E820_ACPI); 1726 update_e820(); 1727} 1728