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/slab.h> 35 #include <linux/bootmem.h> 36 #include <linux/ioport.h> 37 #include <linux/pci.h> 38 39 #include <asm/pci_x86.h> 40 #include <asm/pgtable.h> 41 #include <asm/io_apic.h> 42 #include <asm/apic.h> 43 #include <asm/io.h> 44 #include <asm/mpspec.h> 45 #include <asm/smp.h> 46 47 #include "sleep.h" /* To include x86_acpi_suspend_lowlevel */ 48 static int __initdata acpi_force = 0; 49 int acpi_disabled; 50 EXPORT_SYMBOL(acpi_disabled); 51 52 #ifdef CONFIG_X86_64 53 # include <asm/proto.h> 54 #endif /* X86 */ 55 56 #define PREFIX "ACPI: " 57 58 int acpi_noirq; /* skip ACPI IRQ initialization */ 59 int acpi_pci_disabled; /* skip ACPI PCI scan and IRQ initialization */ 60 EXPORT_SYMBOL(acpi_pci_disabled); 61 62 int acpi_lapic; 63 int acpi_ioapic; 64 int acpi_strict; 65 int acpi_disable_cmcff; 66 67 u8 acpi_sci_flags __initdata; 68 int acpi_sci_override_gsi __initdata; 69 int acpi_skip_timer_override __initdata; 70 int acpi_use_timer_override __initdata; 71 int acpi_fix_pin2_polarity __initdata; 72 73 #ifdef CONFIG_X86_LOCAL_APIC 74 static u64 acpi_lapic_addr __initdata = APIC_DEFAULT_PHYS_BASE; 75 #endif 76 77 #ifndef __HAVE_ARCH_CMPXCHG 78 #warning ACPI uses CMPXCHG, i486 and later hardware 79 #endif 80 81 /* -------------------------------------------------------------------------- 82 Boot-time Configuration 83 -------------------------------------------------------------------------- */ 84 85 /* 86 * The default interrupt routing model is PIC (8259). This gets 87 * overridden if IOAPICs are enumerated (below). 88 */ 89 enum acpi_irq_model_id acpi_irq_model = ACPI_IRQ_MODEL_PIC; 90 91 92 /* 93 * ISA irqs by default are the first 16 gsis but can be 94 * any gsi as specified by an interrupt source override. 95 */ 96 static u32 isa_irq_to_gsi[NR_IRQS_LEGACY] __read_mostly = { 97 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 98 }; 99 100 static unsigned int gsi_to_irq(unsigned int gsi) 101 { 102 unsigned int irq = gsi + NR_IRQS_LEGACY; 103 unsigned int i; 104 105 for (i = 0; i < NR_IRQS_LEGACY; i++) { 106 if (isa_irq_to_gsi[i] == gsi) { 107 return i; 108 } 109 } 110 111 /* Provide an identity mapping of gsi == irq 112 * except on truly weird platforms that have 113 * non isa irqs in the first 16 gsis. 114 */ 115 if (gsi >= NR_IRQS_LEGACY) 116 irq = gsi; 117 else 118 irq = gsi_top + gsi; 119 120 return irq; 121 } 122 123 static u32 irq_to_gsi(int irq) 124 { 125 unsigned int gsi; 126 127 if (irq < NR_IRQS_LEGACY) 128 gsi = isa_irq_to_gsi[irq]; 129 else if (irq < gsi_top) 130 gsi = irq; 131 else if (irq < (gsi_top + NR_IRQS_LEGACY)) 132 gsi = irq - gsi_top; 133 else 134 gsi = 0xffffffff; 135 136 return gsi; 137 } 138 139 /* 140 * This is just a simple wrapper around early_ioremap(), 141 * with sanity checks for phys == 0 and size == 0. 142 */ 143 char *__init __acpi_map_table(unsigned long phys, unsigned long size) 144 { 145 146 if (!phys || !size) 147 return NULL; 148 149 return early_ioremap(phys, size); 150 } 151 152 void __init __acpi_unmap_table(char *map, unsigned long size) 153 { 154 if (!map || !size) 155 return; 156 157 early_iounmap(map, size); 158 } 159 160 #ifdef CONFIG_X86_LOCAL_APIC 161 static int __init acpi_parse_madt(struct acpi_table_header *table) 162 { 163 struct acpi_table_madt *madt = NULL; 164 165 if (!cpu_has_apic) 166 return -EINVAL; 167 168 madt = (struct acpi_table_madt *)table; 169 if (!madt) { 170 printk(KERN_WARNING PREFIX "Unable to map MADT\n"); 171 return -ENODEV; 172 } 173 174 if (madt->address) { 175 acpi_lapic_addr = (u64) madt->address; 176 177 printk(KERN_DEBUG PREFIX "Local APIC address 0x%08x\n", 178 madt->address); 179 } 180 181 default_acpi_madt_oem_check(madt->header.oem_id, 182 madt->header.oem_table_id); 183 184 return 0; 185 } 186 187 /** 188 * acpi_register_lapic - register a local apic and generates a logic cpu number 189 * @id: local apic id to register 190 * @enabled: this cpu is enabled or not 191 * 192 * Returns the logic cpu number which maps to the local apic 193 */ 194 static int acpi_register_lapic(int id, u8 enabled) 195 { 196 unsigned int ver = 0; 197 198 if (id >= MAX_LOCAL_APIC) { 199 printk(KERN_INFO PREFIX "skipped apicid that is too big\n"); 200 return -EINVAL; 201 } 202 203 if (!enabled) { 204 ++disabled_cpus; 205 return -EINVAL; 206 } 207 208 if (boot_cpu_physical_apicid != -1U) 209 ver = apic_version[boot_cpu_physical_apicid]; 210 211 return generic_processor_info(id, ver); 212 } 213 214 static int __init 215 acpi_parse_x2apic(struct acpi_subtable_header *header, const unsigned long end) 216 { 217 struct acpi_madt_local_x2apic *processor = NULL; 218 int apic_id; 219 u8 enabled; 220 221 processor = (struct acpi_madt_local_x2apic *)header; 222 223 if (BAD_MADT_ENTRY(processor, end)) 224 return -EINVAL; 225 226 acpi_table_print_madt_entry(header); 227 228 apic_id = processor->local_apic_id; 229 enabled = processor->lapic_flags & ACPI_MADT_ENABLED; 230 #ifdef CONFIG_X86_X2APIC 231 /* 232 * We need to register disabled CPU as well to permit 233 * counting disabled CPUs. This allows us to size 234 * cpus_possible_map more accurately, to permit 235 * to not preallocating memory for all NR_CPUS 236 * when we use CPU hotplug. 237 */ 238 if (!apic->apic_id_valid(apic_id) && enabled) 239 printk(KERN_WARNING PREFIX "x2apic entry ignored\n"); 240 else 241 acpi_register_lapic(apic_id, enabled); 242 #else 243 printk(KERN_WARNING PREFIX "x2apic entry ignored\n"); 244 #endif 245 246 return 0; 247 } 248 249 static int __init 250 acpi_parse_lapic(struct acpi_subtable_header * header, const unsigned long end) 251 { 252 struct acpi_madt_local_apic *processor = NULL; 253 254 processor = (struct acpi_madt_local_apic *)header; 255 256 if (BAD_MADT_ENTRY(processor, end)) 257 return -EINVAL; 258 259 acpi_table_print_madt_entry(header); 260 261 /* 262 * We need to register disabled CPU as well to permit 263 * counting disabled CPUs. This allows us to size 264 * cpus_possible_map more accurately, to permit 265 * to not preallocating memory for all NR_CPUS 266 * when we use CPU hotplug. 267 */ 268 acpi_register_lapic(processor->id, /* APIC ID */ 269 processor->lapic_flags & ACPI_MADT_ENABLED); 270 271 return 0; 272 } 273 274 static int __init 275 acpi_parse_sapic(struct acpi_subtable_header *header, const unsigned long end) 276 { 277 struct acpi_madt_local_sapic *processor = NULL; 278 279 processor = (struct acpi_madt_local_sapic *)header; 280 281 if (BAD_MADT_ENTRY(processor, end)) 282 return -EINVAL; 283 284 acpi_table_print_madt_entry(header); 285 286 acpi_register_lapic((processor->id << 8) | processor->eid,/* APIC ID */ 287 processor->lapic_flags & ACPI_MADT_ENABLED); 288 289 return 0; 290 } 291 292 static int __init 293 acpi_parse_lapic_addr_ovr(struct acpi_subtable_header * header, 294 const unsigned long end) 295 { 296 struct acpi_madt_local_apic_override *lapic_addr_ovr = NULL; 297 298 lapic_addr_ovr = (struct acpi_madt_local_apic_override *)header; 299 300 if (BAD_MADT_ENTRY(lapic_addr_ovr, end)) 301 return -EINVAL; 302 303 acpi_lapic_addr = lapic_addr_ovr->address; 304 305 return 0; 306 } 307 308 static int __init 309 acpi_parse_x2apic_nmi(struct acpi_subtable_header *header, 310 const unsigned long end) 311 { 312 struct acpi_madt_local_x2apic_nmi *x2apic_nmi = NULL; 313 314 x2apic_nmi = (struct acpi_madt_local_x2apic_nmi *)header; 315 316 if (BAD_MADT_ENTRY(x2apic_nmi, end)) 317 return -EINVAL; 318 319 acpi_table_print_madt_entry(header); 320 321 if (x2apic_nmi->lint != 1) 322 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n"); 323 324 return 0; 325 } 326 327 static int __init 328 acpi_parse_lapic_nmi(struct acpi_subtable_header * header, const unsigned long end) 329 { 330 struct acpi_madt_local_apic_nmi *lapic_nmi = NULL; 331 332 lapic_nmi = (struct acpi_madt_local_apic_nmi *)header; 333 334 if (BAD_MADT_ENTRY(lapic_nmi, end)) 335 return -EINVAL; 336 337 acpi_table_print_madt_entry(header); 338 339 if (lapic_nmi->lint != 1) 340 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n"); 341 342 return 0; 343 } 344 345 #endif /*CONFIG_X86_LOCAL_APIC */ 346 347 #ifdef CONFIG_X86_IO_APIC 348 349 static int __init 350 acpi_parse_ioapic(struct acpi_subtable_header * header, const unsigned long end) 351 { 352 struct acpi_madt_io_apic *ioapic = NULL; 353 354 ioapic = (struct acpi_madt_io_apic *)header; 355 356 if (BAD_MADT_ENTRY(ioapic, end)) 357 return -EINVAL; 358 359 acpi_table_print_madt_entry(header); 360 361 mp_register_ioapic(ioapic->id, 362 ioapic->address, ioapic->global_irq_base); 363 364 return 0; 365 } 366 367 /* 368 * Parse Interrupt Source Override for the ACPI SCI 369 */ 370 static void __init acpi_sci_ioapic_setup(u8 bus_irq, u16 polarity, u16 trigger, u32 gsi) 371 { 372 if (trigger == 0) /* compatible SCI trigger is level */ 373 trigger = 3; 374 375 if (polarity == 0) /* compatible SCI polarity is low */ 376 polarity = 3; 377 378 /* Command-line over-ride via acpi_sci= */ 379 if (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) 380 trigger = (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2; 381 382 if (acpi_sci_flags & ACPI_MADT_POLARITY_MASK) 383 polarity = acpi_sci_flags & ACPI_MADT_POLARITY_MASK; 384 385 /* 386 * mp_config_acpi_legacy_irqs() already setup IRQs < 16 387 * If GSI is < 16, this will update its flags, 388 * else it will create a new mp_irqs[] entry. 389 */ 390 mp_override_legacy_irq(bus_irq, polarity, trigger, gsi); 391 392 /* 393 * stash over-ride to indicate we've been here 394 * and for later update of acpi_gbl_FADT 395 */ 396 acpi_sci_override_gsi = gsi; 397 return; 398 } 399 400 static int __init 401 acpi_parse_int_src_ovr(struct acpi_subtable_header * header, 402 const unsigned long end) 403 { 404 struct acpi_madt_interrupt_override *intsrc = NULL; 405 406 intsrc = (struct acpi_madt_interrupt_override *)header; 407 408 if (BAD_MADT_ENTRY(intsrc, end)) 409 return -EINVAL; 410 411 acpi_table_print_madt_entry(header); 412 413 if (intsrc->source_irq == acpi_gbl_FADT.sci_interrupt) { 414 acpi_sci_ioapic_setup(intsrc->source_irq, 415 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK, 416 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2, 417 intsrc->global_irq); 418 return 0; 419 } 420 421 if (intsrc->source_irq == 0) { 422 if (acpi_skip_timer_override) { 423 printk(PREFIX "BIOS IRQ0 override ignored.\n"); 424 return 0; 425 } 426 427 if ((intsrc->global_irq == 2) && acpi_fix_pin2_polarity 428 && (intsrc->inti_flags & ACPI_MADT_POLARITY_MASK)) { 429 intsrc->inti_flags &= ~ACPI_MADT_POLARITY_MASK; 430 printk(PREFIX "BIOS IRQ0 pin2 override: forcing polarity to high active.\n"); 431 } 432 } 433 434 mp_override_legacy_irq(intsrc->source_irq, 435 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK, 436 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2, 437 intsrc->global_irq); 438 439 return 0; 440 } 441 442 static int __init 443 acpi_parse_nmi_src(struct acpi_subtable_header * header, const unsigned long end) 444 { 445 struct acpi_madt_nmi_source *nmi_src = NULL; 446 447 nmi_src = (struct acpi_madt_nmi_source *)header; 448 449 if (BAD_MADT_ENTRY(nmi_src, end)) 450 return -EINVAL; 451 452 acpi_table_print_madt_entry(header); 453 454 /* TBD: Support nimsrc entries? */ 455 456 return 0; 457 } 458 459 #endif /* CONFIG_X86_IO_APIC */ 460 461 /* 462 * acpi_pic_sci_set_trigger() 463 * 464 * use ELCR to set PIC-mode trigger type for SCI 465 * 466 * If a PIC-mode SCI is not recognized or gives spurious IRQ7's 467 * it may require Edge Trigger -- use "acpi_sci=edge" 468 * 469 * Port 0x4d0-4d1 are ECLR1 and ECLR2, the Edge/Level Control Registers 470 * for the 8259 PIC. bit[n] = 1 means irq[n] is Level, otherwise Edge. 471 * ECLR1 is IRQs 0-7 (IRQ 0, 1, 2 must be 0) 472 * ECLR2 is IRQs 8-15 (IRQ 8, 13 must be 0) 473 */ 474 475 void __init acpi_pic_sci_set_trigger(unsigned int irq, u16 trigger) 476 { 477 unsigned int mask = 1 << irq; 478 unsigned int old, new; 479 480 /* Real old ELCR mask */ 481 old = inb(0x4d0) | (inb(0x4d1) << 8); 482 483 /* 484 * If we use ACPI to set PCI IRQs, then we should clear ELCR 485 * since we will set it correctly as we enable the PCI irq 486 * routing. 487 */ 488 new = acpi_noirq ? old : 0; 489 490 /* 491 * Update SCI information in the ELCR, it isn't in the PCI 492 * routing tables.. 493 */ 494 switch (trigger) { 495 case 1: /* Edge - clear */ 496 new &= ~mask; 497 break; 498 case 3: /* Level - set */ 499 new |= mask; 500 break; 501 } 502 503 if (old == new) 504 return; 505 506 printk(PREFIX "setting ELCR to %04x (from %04x)\n", new, old); 507 outb(new, 0x4d0); 508 outb(new >> 8, 0x4d1); 509 } 510 511 int acpi_gsi_to_irq(u32 gsi, unsigned int *irq) 512 { 513 *irq = gsi_to_irq(gsi); 514 515 #ifdef CONFIG_X86_IO_APIC 516 if (acpi_irq_model == ACPI_IRQ_MODEL_IOAPIC) 517 setup_IO_APIC_irq_extra(gsi); 518 #endif 519 520 return 0; 521 } 522 EXPORT_SYMBOL_GPL(acpi_gsi_to_irq); 523 524 int acpi_isa_irq_to_gsi(unsigned isa_irq, u32 *gsi) 525 { 526 if (isa_irq >= 16) 527 return -1; 528 *gsi = irq_to_gsi(isa_irq); 529 return 0; 530 } 531 532 static int acpi_register_gsi_pic(struct device *dev, u32 gsi, 533 int trigger, int polarity) 534 { 535 #ifdef CONFIG_PCI 536 /* 537 * Make sure all (legacy) PCI IRQs are set as level-triggered. 538 */ 539 if (trigger == ACPI_LEVEL_SENSITIVE) 540 eisa_set_level_irq(gsi); 541 #endif 542 543 return gsi; 544 } 545 546 static int acpi_register_gsi_ioapic(struct device *dev, u32 gsi, 547 int trigger, int polarity) 548 { 549 #ifdef CONFIG_X86_IO_APIC 550 gsi = mp_register_gsi(dev, gsi, trigger, polarity); 551 #endif 552 553 return gsi; 554 } 555 556 int (*__acpi_register_gsi)(struct device *dev, u32 gsi, 557 int trigger, int polarity) = acpi_register_gsi_pic; 558 559 #ifdef CONFIG_ACPI_SLEEP 560 int (*acpi_suspend_lowlevel)(void) = x86_acpi_suspend_lowlevel; 561 #else 562 int (*acpi_suspend_lowlevel)(void); 563 #endif 564 565 /* 566 * success: return IRQ number (>=0) 567 * failure: return < 0 568 */ 569 int acpi_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity) 570 { 571 unsigned int irq; 572 unsigned int plat_gsi = gsi; 573 574 plat_gsi = (*__acpi_register_gsi)(dev, gsi, trigger, polarity); 575 irq = gsi_to_irq(plat_gsi); 576 577 return irq; 578 } 579 EXPORT_SYMBOL_GPL(acpi_register_gsi); 580 581 void acpi_unregister_gsi(u32 gsi) 582 { 583 } 584 EXPORT_SYMBOL_GPL(acpi_unregister_gsi); 585 586 void __init acpi_set_irq_model_pic(void) 587 { 588 acpi_irq_model = ACPI_IRQ_MODEL_PIC; 589 __acpi_register_gsi = acpi_register_gsi_pic; 590 acpi_ioapic = 0; 591 } 592 593 void __init acpi_set_irq_model_ioapic(void) 594 { 595 acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC; 596 __acpi_register_gsi = acpi_register_gsi_ioapic; 597 acpi_ioapic = 1; 598 } 599 600 /* 601 * ACPI based hotplug support for CPU 602 */ 603 #ifdef CONFIG_ACPI_HOTPLUG_CPU 604 #include <acpi/processor.h> 605 606 static void acpi_map_cpu2node(acpi_handle handle, int cpu, int physid) 607 { 608 #ifdef CONFIG_ACPI_NUMA 609 int nid; 610 611 nid = acpi_get_node(handle); 612 if (nid != -1) { 613 set_apicid_to_node(physid, nid); 614 numa_set_node(cpu, nid); 615 } 616 #endif 617 } 618 619 static int _acpi_map_lsapic(acpi_handle handle, int physid, int *pcpu) 620 { 621 int cpu; 622 623 cpu = acpi_register_lapic(physid, ACPI_MADT_ENABLED); 624 if (cpu < 0) { 625 pr_info(PREFIX "Unable to map lapic to logical cpu number\n"); 626 return cpu; 627 } 628 629 acpi_processor_set_pdc(handle); 630 acpi_map_cpu2node(handle, cpu, physid); 631 632 *pcpu = cpu; 633 return 0; 634 } 635 636 /* wrapper to silence section mismatch warning */ 637 int __ref acpi_map_lsapic(acpi_handle handle, int physid, int *pcpu) 638 { 639 return _acpi_map_lsapic(handle, physid, pcpu); 640 } 641 EXPORT_SYMBOL(acpi_map_lsapic); 642 643 int acpi_unmap_lsapic(int cpu) 644 { 645 #ifdef CONFIG_ACPI_NUMA 646 set_apicid_to_node(per_cpu(x86_cpu_to_apicid, cpu), NUMA_NO_NODE); 647 #endif 648 649 per_cpu(x86_cpu_to_apicid, cpu) = -1; 650 set_cpu_present(cpu, false); 651 num_processors--; 652 653 return (0); 654 } 655 656 EXPORT_SYMBOL(acpi_unmap_lsapic); 657 #endif /* CONFIG_ACPI_HOTPLUG_CPU */ 658 659 int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base) 660 { 661 /* TBD */ 662 return -EINVAL; 663 } 664 665 EXPORT_SYMBOL(acpi_register_ioapic); 666 667 int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base) 668 { 669 /* TBD */ 670 return -EINVAL; 671 } 672 673 EXPORT_SYMBOL(acpi_unregister_ioapic); 674 675 static int __init acpi_parse_sbf(struct acpi_table_header *table) 676 { 677 struct acpi_table_boot *sb; 678 679 sb = (struct acpi_table_boot *)table; 680 if (!sb) { 681 printk(KERN_WARNING PREFIX "Unable to map SBF\n"); 682 return -ENODEV; 683 } 684 685 sbf_port = sb->cmos_index; /* Save CMOS port */ 686 687 return 0; 688 } 689 690 #ifdef CONFIG_HPET_TIMER 691 #include <asm/hpet.h> 692 693 static struct resource *hpet_res __initdata; 694 695 static int __init acpi_parse_hpet(struct acpi_table_header *table) 696 { 697 struct acpi_table_hpet *hpet_tbl; 698 699 hpet_tbl = (struct acpi_table_hpet *)table; 700 if (!hpet_tbl) { 701 printk(KERN_WARNING PREFIX "Unable to map HPET\n"); 702 return -ENODEV; 703 } 704 705 if (hpet_tbl->address.space_id != ACPI_SPACE_MEM) { 706 printk(KERN_WARNING PREFIX "HPET timers must be located in " 707 "memory.\n"); 708 return -1; 709 } 710 711 hpet_address = hpet_tbl->address.address; 712 hpet_blockid = hpet_tbl->sequence; 713 714 /* 715 * Some broken BIOSes advertise HPET at 0x0. We really do not 716 * want to allocate a resource there. 717 */ 718 if (!hpet_address) { 719 printk(KERN_WARNING PREFIX 720 "HPET id: %#x base: %#lx is invalid\n", 721 hpet_tbl->id, hpet_address); 722 return 0; 723 } 724 #ifdef CONFIG_X86_64 725 /* 726 * Some even more broken BIOSes advertise HPET at 727 * 0xfed0000000000000 instead of 0xfed00000. Fix it up and add 728 * some noise: 729 */ 730 if (hpet_address == 0xfed0000000000000UL) { 731 if (!hpet_force_user) { 732 printk(KERN_WARNING PREFIX "HPET id: %#x " 733 "base: 0xfed0000000000000 is bogus\n " 734 "try hpet=force on the kernel command line to " 735 "fix it up to 0xfed00000.\n", hpet_tbl->id); 736 hpet_address = 0; 737 return 0; 738 } 739 printk(KERN_WARNING PREFIX 740 "HPET id: %#x base: 0xfed0000000000000 fixed up " 741 "to 0xfed00000.\n", hpet_tbl->id); 742 hpet_address >>= 32; 743 } 744 #endif 745 printk(KERN_INFO PREFIX "HPET id: %#x base: %#lx\n", 746 hpet_tbl->id, hpet_address); 747 748 /* 749 * Allocate and initialize the HPET firmware resource for adding into 750 * the resource tree during the lateinit timeframe. 751 */ 752 #define HPET_RESOURCE_NAME_SIZE 9 753 hpet_res = alloc_bootmem(sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE); 754 755 hpet_res->name = (void *)&hpet_res[1]; 756 hpet_res->flags = IORESOURCE_MEM; 757 snprintf((char *)hpet_res->name, HPET_RESOURCE_NAME_SIZE, "HPET %u", 758 hpet_tbl->sequence); 759 760 hpet_res->start = hpet_address; 761 hpet_res->end = hpet_address + (1 * 1024) - 1; 762 763 return 0; 764 } 765 766 /* 767 * hpet_insert_resource inserts the HPET resources used into the resource 768 * tree. 769 */ 770 static __init int hpet_insert_resource(void) 771 { 772 if (!hpet_res) 773 return 1; 774 775 return insert_resource(&iomem_resource, hpet_res); 776 } 777 778 late_initcall(hpet_insert_resource); 779 780 #else 781 #define acpi_parse_hpet NULL 782 #endif 783 784 static int __init acpi_parse_fadt(struct acpi_table_header *table) 785 { 786 787 #ifdef CONFIG_X86_PM_TIMER 788 /* detect the location of the ACPI PM Timer */ 789 if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID) { 790 /* FADT rev. 2 */ 791 if (acpi_gbl_FADT.xpm_timer_block.space_id != 792 ACPI_ADR_SPACE_SYSTEM_IO) 793 return 0; 794 795 pmtmr_ioport = acpi_gbl_FADT.xpm_timer_block.address; 796 /* 797 * "X" fields are optional extensions to the original V1.0 798 * fields, so we must selectively expand V1.0 fields if the 799 * corresponding X field is zero. 800 */ 801 if (!pmtmr_ioport) 802 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block; 803 } else { 804 /* FADT rev. 1 */ 805 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block; 806 } 807 if (pmtmr_ioport) 808 printk(KERN_INFO PREFIX "PM-Timer IO Port: %#x\n", 809 pmtmr_ioport); 810 #endif 811 return 0; 812 } 813 814 #ifdef CONFIG_X86_LOCAL_APIC 815 /* 816 * Parse LAPIC entries in MADT 817 * returns 0 on success, < 0 on error 818 */ 819 820 static int __init early_acpi_parse_madt_lapic_addr_ovr(void) 821 { 822 int count; 823 824 if (!cpu_has_apic) 825 return -ENODEV; 826 827 /* 828 * Note that the LAPIC address is obtained from the MADT (32-bit value) 829 * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value). 830 */ 831 832 count = 833 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE, 834 acpi_parse_lapic_addr_ovr, 0); 835 if (count < 0) { 836 printk(KERN_ERR PREFIX 837 "Error parsing LAPIC address override entry\n"); 838 return count; 839 } 840 841 register_lapic_address(acpi_lapic_addr); 842 843 return count; 844 } 845 846 static int __init acpi_parse_madt_lapic_entries(void) 847 { 848 int count; 849 int x2count = 0; 850 851 if (!cpu_has_apic) 852 return -ENODEV; 853 854 /* 855 * Note that the LAPIC address is obtained from the MADT (32-bit value) 856 * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value). 857 */ 858 859 count = 860 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE, 861 acpi_parse_lapic_addr_ovr, 0); 862 if (count < 0) { 863 printk(KERN_ERR PREFIX 864 "Error parsing LAPIC address override entry\n"); 865 return count; 866 } 867 868 register_lapic_address(acpi_lapic_addr); 869 870 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC, 871 acpi_parse_sapic, MAX_LOCAL_APIC); 872 873 if (!count) { 874 x2count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC, 875 acpi_parse_x2apic, MAX_LOCAL_APIC); 876 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC, 877 acpi_parse_lapic, MAX_LOCAL_APIC); 878 } 879 if (!count && !x2count) { 880 printk(KERN_ERR PREFIX "No LAPIC entries present\n"); 881 /* TBD: Cleanup to allow fallback to MPS */ 882 return -ENODEV; 883 } else if (count < 0 || x2count < 0) { 884 printk(KERN_ERR PREFIX "Error parsing LAPIC entry\n"); 885 /* TBD: Cleanup to allow fallback to MPS */ 886 return count; 887 } 888 889 x2count = 890 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC_NMI, 891 acpi_parse_x2apic_nmi, 0); 892 count = 893 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI, acpi_parse_lapic_nmi, 0); 894 if (count < 0 || x2count < 0) { 895 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n"); 896 /* TBD: Cleanup to allow fallback to MPS */ 897 return count; 898 } 899 return 0; 900 } 901 #endif /* CONFIG_X86_LOCAL_APIC */ 902 903 #ifdef CONFIG_X86_IO_APIC 904 #define MP_ISA_BUS 0 905 906 void __init mp_override_legacy_irq(u8 bus_irq, u8 polarity, u8 trigger, u32 gsi) 907 { 908 int ioapic; 909 int pin; 910 struct mpc_intsrc mp_irq; 911 912 /* 913 * Convert 'gsi' to 'ioapic.pin'. 914 */ 915 ioapic = mp_find_ioapic(gsi); 916 if (ioapic < 0) 917 return; 918 pin = mp_find_ioapic_pin(ioapic, gsi); 919 920 /* 921 * TBD: This check is for faulty timer entries, where the override 922 * erroneously sets the trigger to level, resulting in a HUGE 923 * increase of timer interrupts! 924 */ 925 if ((bus_irq == 0) && (trigger == 3)) 926 trigger = 1; 927 928 mp_irq.type = MP_INTSRC; 929 mp_irq.irqtype = mp_INT; 930 mp_irq.irqflag = (trigger << 2) | polarity; 931 mp_irq.srcbus = MP_ISA_BUS; 932 mp_irq.srcbusirq = bus_irq; /* IRQ */ 933 mp_irq.dstapic = mpc_ioapic_id(ioapic); /* APIC ID */ 934 mp_irq.dstirq = pin; /* INTIN# */ 935 936 mp_save_irq(&mp_irq); 937 938 isa_irq_to_gsi[bus_irq] = gsi; 939 } 940 941 void __init mp_config_acpi_legacy_irqs(void) 942 { 943 int i; 944 struct mpc_intsrc mp_irq; 945 946 #ifdef CONFIG_EISA 947 /* 948 * Fabricate the legacy ISA bus (bus #31). 949 */ 950 mp_bus_id_to_type[MP_ISA_BUS] = MP_BUS_ISA; 951 #endif 952 set_bit(MP_ISA_BUS, mp_bus_not_pci); 953 pr_debug("Bus #%d is ISA\n", MP_ISA_BUS); 954 955 /* 956 * Use the default configuration for the IRQs 0-15. Unless 957 * overridden by (MADT) interrupt source override entries. 958 */ 959 for (i = 0; i < 16; i++) { 960 int ioapic, pin; 961 unsigned int dstapic; 962 int idx; 963 u32 gsi; 964 965 /* Locate the gsi that irq i maps to. */ 966 if (acpi_isa_irq_to_gsi(i, &gsi)) 967 continue; 968 969 /* 970 * Locate the IOAPIC that manages the ISA IRQ. 971 */ 972 ioapic = mp_find_ioapic(gsi); 973 if (ioapic < 0) 974 continue; 975 pin = mp_find_ioapic_pin(ioapic, gsi); 976 dstapic = mpc_ioapic_id(ioapic); 977 978 for (idx = 0; idx < mp_irq_entries; idx++) { 979 struct mpc_intsrc *irq = mp_irqs + idx; 980 981 /* Do we already have a mapping for this ISA IRQ? */ 982 if (irq->srcbus == MP_ISA_BUS && irq->srcbusirq == i) 983 break; 984 985 /* Do we already have a mapping for this IOAPIC pin */ 986 if (irq->dstapic == dstapic && irq->dstirq == pin) 987 break; 988 } 989 990 if (idx != mp_irq_entries) { 991 printk(KERN_DEBUG "ACPI: IRQ%d used by override.\n", i); 992 continue; /* IRQ already used */ 993 } 994 995 mp_irq.type = MP_INTSRC; 996 mp_irq.irqflag = 0; /* Conforming */ 997 mp_irq.srcbus = MP_ISA_BUS; 998 mp_irq.dstapic = dstapic; 999 mp_irq.irqtype = mp_INT; 1000 mp_irq.srcbusirq = i; /* Identity mapped */ 1001 mp_irq.dstirq = pin; 1002 1003 mp_save_irq(&mp_irq); 1004 } 1005 } 1006 1007 static int mp_config_acpi_gsi(struct device *dev, u32 gsi, int trigger, 1008 int polarity) 1009 { 1010 #ifdef CONFIG_X86_MPPARSE 1011 struct mpc_intsrc mp_irq; 1012 struct pci_dev *pdev; 1013 unsigned char number; 1014 unsigned int devfn; 1015 int ioapic; 1016 u8 pin; 1017 1018 if (!acpi_ioapic) 1019 return 0; 1020 if (!dev || !dev_is_pci(dev)) 1021 return 0; 1022 1023 pdev = to_pci_dev(dev); 1024 number = pdev->bus->number; 1025 devfn = pdev->devfn; 1026 pin = pdev->pin; 1027 /* print the entry should happen on mptable identically */ 1028 mp_irq.type = MP_INTSRC; 1029 mp_irq.irqtype = mp_INT; 1030 mp_irq.irqflag = (trigger == ACPI_EDGE_SENSITIVE ? 4 : 0x0c) | 1031 (polarity == ACPI_ACTIVE_HIGH ? 1 : 3); 1032 mp_irq.srcbus = number; 1033 mp_irq.srcbusirq = (((devfn >> 3) & 0x1f) << 2) | ((pin - 1) & 3); 1034 ioapic = mp_find_ioapic(gsi); 1035 mp_irq.dstapic = mpc_ioapic_id(ioapic); 1036 mp_irq.dstirq = mp_find_ioapic_pin(ioapic, gsi); 1037 1038 mp_save_irq(&mp_irq); 1039 #endif 1040 return 0; 1041 } 1042 1043 int mp_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity) 1044 { 1045 int ioapic; 1046 int ioapic_pin; 1047 struct io_apic_irq_attr irq_attr; 1048 int ret; 1049 1050 if (acpi_irq_model != ACPI_IRQ_MODEL_IOAPIC) 1051 return gsi; 1052 1053 /* Don't set up the ACPI SCI because it's already set up */ 1054 if (acpi_gbl_FADT.sci_interrupt == gsi) 1055 return gsi; 1056 1057 ioapic = mp_find_ioapic(gsi); 1058 if (ioapic < 0) { 1059 printk(KERN_WARNING "No IOAPIC for GSI %u\n", gsi); 1060 return gsi; 1061 } 1062 1063 ioapic_pin = mp_find_ioapic_pin(ioapic, gsi); 1064 1065 if (ioapic_pin > MP_MAX_IOAPIC_PIN) { 1066 printk(KERN_ERR "Invalid reference to IOAPIC pin " 1067 "%d-%d\n", mpc_ioapic_id(ioapic), 1068 ioapic_pin); 1069 return gsi; 1070 } 1071 1072 if (enable_update_mptable) 1073 mp_config_acpi_gsi(dev, gsi, trigger, polarity); 1074 1075 set_io_apic_irq_attr(&irq_attr, ioapic, ioapic_pin, 1076 trigger == ACPI_EDGE_SENSITIVE ? 0 : 1, 1077 polarity == ACPI_ACTIVE_HIGH ? 0 : 1); 1078 ret = io_apic_set_pci_routing(dev, gsi_to_irq(gsi), &irq_attr); 1079 if (ret < 0) 1080 gsi = INT_MIN; 1081 1082 return gsi; 1083 } 1084 1085 /* 1086 * Parse IOAPIC related entries in MADT 1087 * returns 0 on success, < 0 on error 1088 */ 1089 static int __init acpi_parse_madt_ioapic_entries(void) 1090 { 1091 int count; 1092 1093 /* 1094 * ACPI interpreter is required to complete interrupt setup, 1095 * so if it is off, don't enumerate the io-apics with ACPI. 1096 * If MPS is present, it will handle them, 1097 * otherwise the system will stay in PIC mode 1098 */ 1099 if (acpi_disabled || acpi_noirq) 1100 return -ENODEV; 1101 1102 if (!cpu_has_apic) 1103 return -ENODEV; 1104 1105 /* 1106 * if "noapic" boot option, don't look for IO-APICs 1107 */ 1108 if (skip_ioapic_setup) { 1109 printk(KERN_INFO PREFIX "Skipping IOAPIC probe " 1110 "due to 'noapic' option.\n"); 1111 return -ENODEV; 1112 } 1113 1114 count = 1115 acpi_table_parse_madt(ACPI_MADT_TYPE_IO_APIC, acpi_parse_ioapic, 1116 MAX_IO_APICS); 1117 if (!count) { 1118 printk(KERN_ERR PREFIX "No IOAPIC entries present\n"); 1119 return -ENODEV; 1120 } else if (count < 0) { 1121 printk(KERN_ERR PREFIX "Error parsing IOAPIC entry\n"); 1122 return count; 1123 } 1124 1125 count = 1126 acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE, acpi_parse_int_src_ovr, 1127 nr_irqs); 1128 if (count < 0) { 1129 printk(KERN_ERR PREFIX 1130 "Error parsing interrupt source overrides entry\n"); 1131 /* TBD: Cleanup to allow fallback to MPS */ 1132 return count; 1133 } 1134 1135 /* 1136 * If BIOS did not supply an INT_SRC_OVR for the SCI 1137 * pretend we got one so we can set the SCI flags. 1138 */ 1139 if (!acpi_sci_override_gsi) 1140 acpi_sci_ioapic_setup(acpi_gbl_FADT.sci_interrupt, 0, 0, 1141 acpi_gbl_FADT.sci_interrupt); 1142 1143 /* Fill in identity legacy mappings where no override */ 1144 mp_config_acpi_legacy_irqs(); 1145 1146 count = 1147 acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE, acpi_parse_nmi_src, 1148 nr_irqs); 1149 if (count < 0) { 1150 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n"); 1151 /* TBD: Cleanup to allow fallback to MPS */ 1152 return count; 1153 } 1154 1155 return 0; 1156 } 1157 #else 1158 static inline int acpi_parse_madt_ioapic_entries(void) 1159 { 1160 return -1; 1161 } 1162 #endif /* !CONFIG_X86_IO_APIC */ 1163 1164 static void __init early_acpi_process_madt(void) 1165 { 1166 #ifdef CONFIG_X86_LOCAL_APIC 1167 int error; 1168 1169 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) { 1170 1171 /* 1172 * Parse MADT LAPIC entries 1173 */ 1174 error = early_acpi_parse_madt_lapic_addr_ovr(); 1175 if (!error) { 1176 acpi_lapic = 1; 1177 smp_found_config = 1; 1178 } 1179 if (error == -EINVAL) { 1180 /* 1181 * Dell Precision Workstation 410, 610 come here. 1182 */ 1183 printk(KERN_ERR PREFIX 1184 "Invalid BIOS MADT, disabling ACPI\n"); 1185 disable_acpi(); 1186 } 1187 } 1188 #endif 1189 } 1190 1191 static void __init acpi_process_madt(void) 1192 { 1193 #ifdef CONFIG_X86_LOCAL_APIC 1194 int error; 1195 1196 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) { 1197 1198 /* 1199 * Parse MADT LAPIC entries 1200 */ 1201 error = acpi_parse_madt_lapic_entries(); 1202 if (!error) { 1203 acpi_lapic = 1; 1204 1205 /* 1206 * Parse MADT IO-APIC entries 1207 */ 1208 error = acpi_parse_madt_ioapic_entries(); 1209 if (!error) { 1210 acpi_set_irq_model_ioapic(); 1211 1212 smp_found_config = 1; 1213 } 1214 } 1215 if (error == -EINVAL) { 1216 /* 1217 * Dell Precision Workstation 410, 610 come here. 1218 */ 1219 printk(KERN_ERR PREFIX 1220 "Invalid BIOS MADT, disabling ACPI\n"); 1221 disable_acpi(); 1222 } 1223 } else { 1224 /* 1225 * ACPI found no MADT, and so ACPI wants UP PIC mode. 1226 * In the event an MPS table was found, forget it. 1227 * Boot with "acpi=off" to use MPS on such a system. 1228 */ 1229 if (smp_found_config) { 1230 printk(KERN_WARNING PREFIX 1231 "No APIC-table, disabling MPS\n"); 1232 smp_found_config = 0; 1233 } 1234 } 1235 1236 /* 1237 * ACPI supports both logical (e.g. Hyper-Threading) and physical 1238 * processors, where MPS only supports physical. 1239 */ 1240 if (acpi_lapic && acpi_ioapic) 1241 printk(KERN_INFO "Using ACPI (MADT) for SMP configuration " 1242 "information\n"); 1243 else if (acpi_lapic) 1244 printk(KERN_INFO "Using ACPI for processor (LAPIC) " 1245 "configuration information\n"); 1246 #endif 1247 return; 1248 } 1249 1250 static int __init disable_acpi_irq(const struct dmi_system_id *d) 1251 { 1252 if (!acpi_force) { 1253 printk(KERN_NOTICE "%s detected: force use of acpi=noirq\n", 1254 d->ident); 1255 acpi_noirq_set(); 1256 } 1257 return 0; 1258 } 1259 1260 static int __init disable_acpi_pci(const struct dmi_system_id *d) 1261 { 1262 if (!acpi_force) { 1263 printk(KERN_NOTICE "%s detected: force use of pci=noacpi\n", 1264 d->ident); 1265 acpi_disable_pci(); 1266 } 1267 return 0; 1268 } 1269 1270 static int __init dmi_disable_acpi(const struct dmi_system_id *d) 1271 { 1272 if (!acpi_force) { 1273 printk(KERN_NOTICE "%s detected: acpi off\n", d->ident); 1274 disable_acpi(); 1275 } else { 1276 printk(KERN_NOTICE 1277 "Warning: DMI blacklist says broken, but acpi forced\n"); 1278 } 1279 return 0; 1280 } 1281 1282 /* 1283 * Force ignoring BIOS IRQ0 override 1284 */ 1285 static int __init dmi_ignore_irq0_timer_override(const struct dmi_system_id *d) 1286 { 1287 if (!acpi_skip_timer_override) { 1288 pr_notice("%s detected: Ignoring BIOS IRQ0 override\n", 1289 d->ident); 1290 acpi_skip_timer_override = 1; 1291 } 1292 return 0; 1293 } 1294 1295 /* 1296 * If your system is blacklisted here, but you find that acpi=force 1297 * works for you, please contact linux-acpi@vger.kernel.org 1298 */ 1299 static struct dmi_system_id __initdata acpi_dmi_table[] = { 1300 /* 1301 * Boxes that need ACPI disabled 1302 */ 1303 { 1304 .callback = dmi_disable_acpi, 1305 .ident = "IBM Thinkpad", 1306 .matches = { 1307 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), 1308 DMI_MATCH(DMI_BOARD_NAME, "2629H1G"), 1309 }, 1310 }, 1311 1312 /* 1313 * Boxes that need ACPI PCI IRQ routing disabled 1314 */ 1315 { 1316 .callback = disable_acpi_irq, 1317 .ident = "ASUS A7V", 1318 .matches = { 1319 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC"), 1320 DMI_MATCH(DMI_BOARD_NAME, "<A7V>"), 1321 /* newer BIOS, Revision 1011, does work */ 1322 DMI_MATCH(DMI_BIOS_VERSION, 1323 "ASUS A7V ACPI BIOS Revision 1007"), 1324 }, 1325 }, 1326 { 1327 /* 1328 * Latest BIOS for IBM 600E (1.16) has bad pcinum 1329 * for LPC bridge, which is needed for the PCI 1330 * interrupt links to work. DSDT fix is in bug 5966. 1331 * 2645, 2646 model numbers are shared with 600/600E/600X 1332 */ 1333 .callback = disable_acpi_irq, 1334 .ident = "IBM Thinkpad 600 Series 2645", 1335 .matches = { 1336 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), 1337 DMI_MATCH(DMI_BOARD_NAME, "2645"), 1338 }, 1339 }, 1340 { 1341 .callback = disable_acpi_irq, 1342 .ident = "IBM Thinkpad 600 Series 2646", 1343 .matches = { 1344 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), 1345 DMI_MATCH(DMI_BOARD_NAME, "2646"), 1346 }, 1347 }, 1348 /* 1349 * Boxes that need ACPI PCI IRQ routing and PCI scan disabled 1350 */ 1351 { /* _BBN 0 bug */ 1352 .callback = disable_acpi_pci, 1353 .ident = "ASUS PR-DLS", 1354 .matches = { 1355 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."), 1356 DMI_MATCH(DMI_BOARD_NAME, "PR-DLS"), 1357 DMI_MATCH(DMI_BIOS_VERSION, 1358 "ASUS PR-DLS ACPI BIOS Revision 1010"), 1359 DMI_MATCH(DMI_BIOS_DATE, "03/21/2003") 1360 }, 1361 }, 1362 { 1363 .callback = disable_acpi_pci, 1364 .ident = "Acer TravelMate 36x Laptop", 1365 .matches = { 1366 DMI_MATCH(DMI_SYS_VENDOR, "Acer"), 1367 DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"), 1368 }, 1369 }, 1370 {} 1371 }; 1372 1373 /* second table for DMI checks that should run after early-quirks */ 1374 static struct dmi_system_id __initdata acpi_dmi_table_late[] = { 1375 /* 1376 * HP laptops which use a DSDT reporting as HP/SB400/10000, 1377 * which includes some code which overrides all temperature 1378 * trip points to 16C if the INTIN2 input of the I/O APIC 1379 * is enabled. This input is incorrectly designated the 1380 * ISA IRQ 0 via an interrupt source override even though 1381 * it is wired to the output of the master 8259A and INTIN0 1382 * is not connected at all. Force ignoring BIOS IRQ0 1383 * override in that cases. 1384 */ 1385 { 1386 .callback = dmi_ignore_irq0_timer_override, 1387 .ident = "HP nx6115 laptop", 1388 .matches = { 1389 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 1390 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6115"), 1391 }, 1392 }, 1393 { 1394 .callback = dmi_ignore_irq0_timer_override, 1395 .ident = "HP NX6125 laptop", 1396 .matches = { 1397 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 1398 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6125"), 1399 }, 1400 }, 1401 { 1402 .callback = dmi_ignore_irq0_timer_override, 1403 .ident = "HP NX6325 laptop", 1404 .matches = { 1405 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 1406 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6325"), 1407 }, 1408 }, 1409 { 1410 .callback = dmi_ignore_irq0_timer_override, 1411 .ident = "HP 6715b laptop", 1412 .matches = { 1413 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 1414 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq 6715b"), 1415 }, 1416 }, 1417 { 1418 .callback = dmi_ignore_irq0_timer_override, 1419 .ident = "FUJITSU SIEMENS", 1420 .matches = { 1421 DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"), 1422 DMI_MATCH(DMI_PRODUCT_NAME, "AMILO PRO V2030"), 1423 }, 1424 }, 1425 {} 1426 }; 1427 1428 /* 1429 * acpi_boot_table_init() and acpi_boot_init() 1430 * called from setup_arch(), always. 1431 * 1. checksums all tables 1432 * 2. enumerates lapics 1433 * 3. enumerates io-apics 1434 * 1435 * acpi_table_init() is separate to allow reading SRAT without 1436 * other side effects. 1437 * 1438 * side effects of acpi_boot_init: 1439 * acpi_lapic = 1 if LAPIC found 1440 * acpi_ioapic = 1 if IOAPIC found 1441 * if (acpi_lapic && acpi_ioapic) smp_found_config = 1; 1442 * if acpi_blacklisted() acpi_disabled = 1; 1443 * acpi_irq_model=... 1444 * ... 1445 */ 1446 1447 void __init acpi_boot_table_init(void) 1448 { 1449 dmi_check_system(acpi_dmi_table); 1450 1451 /* 1452 * If acpi_disabled, bail out 1453 */ 1454 if (acpi_disabled) 1455 return; 1456 1457 /* 1458 * Initialize the ACPI boot-time table parser. 1459 */ 1460 if (acpi_table_init()) { 1461 disable_acpi(); 1462 return; 1463 } 1464 1465 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf); 1466 1467 /* 1468 * blacklist may disable ACPI entirely 1469 */ 1470 if (acpi_blacklisted()) { 1471 if (acpi_force) { 1472 printk(KERN_WARNING PREFIX "acpi=force override\n"); 1473 } else { 1474 printk(KERN_WARNING PREFIX "Disabling ACPI support\n"); 1475 disable_acpi(); 1476 return; 1477 } 1478 } 1479 } 1480 1481 int __init early_acpi_boot_init(void) 1482 { 1483 /* 1484 * If acpi_disabled, bail out 1485 */ 1486 if (acpi_disabled) 1487 return 1; 1488 1489 /* 1490 * Process the Multiple APIC Description Table (MADT), if present 1491 */ 1492 early_acpi_process_madt(); 1493 1494 return 0; 1495 } 1496 1497 int __init acpi_boot_init(void) 1498 { 1499 /* those are executed after early-quirks are executed */ 1500 dmi_check_system(acpi_dmi_table_late); 1501 1502 /* 1503 * If acpi_disabled, bail out 1504 */ 1505 if (acpi_disabled) 1506 return 1; 1507 1508 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf); 1509 1510 /* 1511 * set sci_int and PM timer address 1512 */ 1513 acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt); 1514 1515 /* 1516 * Process the Multiple APIC Description Table (MADT), if present 1517 */ 1518 acpi_process_madt(); 1519 1520 acpi_table_parse(ACPI_SIG_HPET, acpi_parse_hpet); 1521 1522 if (!acpi_noirq) 1523 x86_init.pci.init = pci_acpi_init; 1524 1525 return 0; 1526 } 1527 1528 static int __init parse_acpi(char *arg) 1529 { 1530 if (!arg) 1531 return -EINVAL; 1532 1533 /* "acpi=off" disables both ACPI table parsing and interpreter */ 1534 if (strcmp(arg, "off") == 0) { 1535 disable_acpi(); 1536 } 1537 /* acpi=force to over-ride black-list */ 1538 else if (strcmp(arg, "force") == 0) { 1539 acpi_force = 1; 1540 acpi_disabled = 0; 1541 } 1542 /* acpi=strict disables out-of-spec workarounds */ 1543 else if (strcmp(arg, "strict") == 0) { 1544 acpi_strict = 1; 1545 } 1546 /* acpi=rsdt use RSDT instead of XSDT */ 1547 else if (strcmp(arg, "rsdt") == 0) { 1548 acpi_gbl_do_not_use_xsdt = TRUE; 1549 } 1550 /* "acpi=noirq" disables ACPI interrupt routing */ 1551 else if (strcmp(arg, "noirq") == 0) { 1552 acpi_noirq_set(); 1553 } 1554 /* "acpi=copy_dsdt" copys DSDT */ 1555 else if (strcmp(arg, "copy_dsdt") == 0) { 1556 acpi_gbl_copy_dsdt_locally = 1; 1557 } 1558 /* "acpi=nocmcff" disables FF mode for corrected errors */ 1559 else if (strcmp(arg, "nocmcff") == 0) { 1560 acpi_disable_cmcff = 1; 1561 } else { 1562 /* Core will printk when we return error. */ 1563 return -EINVAL; 1564 } 1565 return 0; 1566 } 1567 early_param("acpi", parse_acpi); 1568 1569 /* FIXME: Using pci= for an ACPI parameter is a travesty. */ 1570 static int __init parse_pci(char *arg) 1571 { 1572 if (arg && strcmp(arg, "noacpi") == 0) 1573 acpi_disable_pci(); 1574 return 0; 1575 } 1576 early_param("pci", parse_pci); 1577 1578 int __init acpi_mps_check(void) 1579 { 1580 #if defined(CONFIG_X86_LOCAL_APIC) && !defined(CONFIG_X86_MPPARSE) 1581 /* mptable code is not built-in*/ 1582 if (acpi_disabled || acpi_noirq) { 1583 printk(KERN_WARNING "MPS support code is not built-in.\n" 1584 "Using acpi=off or acpi=noirq or pci=noacpi " 1585 "may have problem\n"); 1586 return 1; 1587 } 1588 #endif 1589 return 0; 1590 } 1591 1592 #ifdef CONFIG_X86_IO_APIC 1593 static int __init parse_acpi_skip_timer_override(char *arg) 1594 { 1595 acpi_skip_timer_override = 1; 1596 return 0; 1597 } 1598 early_param("acpi_skip_timer_override", parse_acpi_skip_timer_override); 1599 1600 static int __init parse_acpi_use_timer_override(char *arg) 1601 { 1602 acpi_use_timer_override = 1; 1603 return 0; 1604 } 1605 early_param("acpi_use_timer_override", parse_acpi_use_timer_override); 1606 #endif /* CONFIG_X86_IO_APIC */ 1607 1608 static int __init setup_acpi_sci(char *s) 1609 { 1610 if (!s) 1611 return -EINVAL; 1612 if (!strcmp(s, "edge")) 1613 acpi_sci_flags = ACPI_MADT_TRIGGER_EDGE | 1614 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK); 1615 else if (!strcmp(s, "level")) 1616 acpi_sci_flags = ACPI_MADT_TRIGGER_LEVEL | 1617 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK); 1618 else if (!strcmp(s, "high")) 1619 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_HIGH | 1620 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK); 1621 else if (!strcmp(s, "low")) 1622 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_LOW | 1623 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK); 1624 else 1625 return -EINVAL; 1626 return 0; 1627 } 1628 early_param("acpi_sci", setup_acpi_sci); 1629 1630 int __acpi_acquire_global_lock(unsigned int *lock) 1631 { 1632 unsigned int old, new, val; 1633 do { 1634 old = *lock; 1635 new = (((old & ~0x3) + 2) + ((old >> 1) & 0x1)); 1636 val = cmpxchg(lock, old, new); 1637 } while (unlikely (val != old)); 1638 return (new < 3) ? -1 : 0; 1639 } 1640 1641 int __acpi_release_global_lock(unsigned int *lock) 1642 { 1643 unsigned int old, new, val; 1644 do { 1645 old = *lock; 1646 new = old & ~0x3; 1647 val = cmpxchg(lock, old, new); 1648 } while (unlikely (val != old)); 1649 return old & 0x1; 1650 } 1651 1652 void __init arch_reserve_mem_area(acpi_physical_address addr, size_t size) 1653 { 1654 e820_add_region(addr, size, E820_ACPI); 1655 update_e820(); 1656 } 1657