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 u32 acpi_rsdt_forced; 50 int acpi_disabled; 51 EXPORT_SYMBOL(acpi_disabled); 52 53 #ifdef CONFIG_X86_64 54 # include <asm/proto.h> 55 #endif /* X86 */ 56 57 #define BAD_MADT_ENTRY(entry, end) ( \ 58 (!entry) || (unsigned long)entry + sizeof(*entry) > end || \ 59 ((struct acpi_subtable_header *)entry)->length < sizeof(*entry)) 60 61 #define PREFIX "ACPI: " 62 63 int acpi_noirq; /* skip ACPI IRQ initialization */ 64 int acpi_pci_disabled; /* skip ACPI PCI scan and IRQ initialization */ 65 EXPORT_SYMBOL(acpi_pci_disabled); 66 67 int acpi_lapic; 68 int acpi_ioapic; 69 int acpi_strict; 70 int acpi_disable_cmcff; 71 72 u8 acpi_sci_flags __initdata; 73 int acpi_sci_override_gsi __initdata; 74 int acpi_skip_timer_override __initdata; 75 int acpi_use_timer_override __initdata; 76 int acpi_fix_pin2_polarity __initdata; 77 78 #ifdef CONFIG_X86_LOCAL_APIC 79 static u64 acpi_lapic_addr __initdata = APIC_DEFAULT_PHYS_BASE; 80 #endif 81 82 #ifndef __HAVE_ARCH_CMPXCHG 83 #warning ACPI uses CMPXCHG, i486 and later hardware 84 #endif 85 86 /* -------------------------------------------------------------------------- 87 Boot-time Configuration 88 -------------------------------------------------------------------------- */ 89 90 /* 91 * The default interrupt routing model is PIC (8259). This gets 92 * overridden if IOAPICs are enumerated (below). 93 */ 94 enum acpi_irq_model_id acpi_irq_model = ACPI_IRQ_MODEL_PIC; 95 96 97 /* 98 * ISA irqs by default are the first 16 gsis but can be 99 * any gsi as specified by an interrupt source override. 100 */ 101 static u32 isa_irq_to_gsi[NR_IRQS_LEGACY] __read_mostly = { 102 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 103 }; 104 105 static unsigned int gsi_to_irq(unsigned int gsi) 106 { 107 unsigned int irq = gsi + NR_IRQS_LEGACY; 108 unsigned int i; 109 110 for (i = 0; i < NR_IRQS_LEGACY; i++) { 111 if (isa_irq_to_gsi[i] == gsi) { 112 return i; 113 } 114 } 115 116 /* Provide an identity mapping of gsi == irq 117 * except on truly weird platforms that have 118 * non isa irqs in the first 16 gsis. 119 */ 120 if (gsi >= NR_IRQS_LEGACY) 121 irq = gsi; 122 else 123 irq = gsi_top + gsi; 124 125 return irq; 126 } 127 128 static u32 irq_to_gsi(int irq) 129 { 130 unsigned int gsi; 131 132 if (irq < NR_IRQS_LEGACY) 133 gsi = isa_irq_to_gsi[irq]; 134 else if (irq < gsi_top) 135 gsi = irq; 136 else if (irq < (gsi_top + NR_IRQS_LEGACY)) 137 gsi = irq - gsi_top; 138 else 139 gsi = 0xffffffff; 140 141 return gsi; 142 } 143 144 /* 145 * This is just a simple wrapper around early_ioremap(), 146 * with sanity checks for phys == 0 and size == 0. 147 */ 148 char *__init __acpi_map_table(unsigned long phys, unsigned long size) 149 { 150 151 if (!phys || !size) 152 return NULL; 153 154 return early_ioremap(phys, size); 155 } 156 157 void __init __acpi_unmap_table(char *map, unsigned long size) 158 { 159 if (!map || !size) 160 return; 161 162 early_iounmap(map, size); 163 } 164 165 #ifdef CONFIG_X86_LOCAL_APIC 166 static int __init acpi_parse_madt(struct acpi_table_header *table) 167 { 168 struct acpi_table_madt *madt = NULL; 169 170 if (!cpu_has_apic) 171 return -EINVAL; 172 173 madt = (struct acpi_table_madt *)table; 174 if (!madt) { 175 printk(KERN_WARNING PREFIX "Unable to map MADT\n"); 176 return -ENODEV; 177 } 178 179 if (madt->address) { 180 acpi_lapic_addr = (u64) madt->address; 181 182 printk(KERN_DEBUG PREFIX "Local APIC address 0x%08x\n", 183 madt->address); 184 } 185 186 default_acpi_madt_oem_check(madt->header.oem_id, 187 madt->header.oem_table_id); 188 189 return 0; 190 } 191 192 /** 193 * acpi_register_lapic - register a local apic and generates a logic cpu number 194 * @id: local apic id to register 195 * @enabled: this cpu is enabled or not 196 * 197 * Returns the logic cpu number which maps to the local apic 198 */ 199 static int acpi_register_lapic(int id, u8 enabled) 200 { 201 unsigned int ver = 0; 202 203 if (id >= MAX_LOCAL_APIC) { 204 printk(KERN_INFO PREFIX "skipped apicid that is too big\n"); 205 return -EINVAL; 206 } 207 208 if (!enabled) { 209 ++disabled_cpus; 210 return -EINVAL; 211 } 212 213 if (boot_cpu_physical_apicid != -1U) 214 ver = apic_version[boot_cpu_physical_apicid]; 215 216 return generic_processor_info(id, ver); 217 } 218 219 static int __init 220 acpi_parse_x2apic(struct acpi_subtable_header *header, const unsigned long end) 221 { 222 struct acpi_madt_local_x2apic *processor = NULL; 223 int apic_id; 224 u8 enabled; 225 226 processor = (struct acpi_madt_local_x2apic *)header; 227 228 if (BAD_MADT_ENTRY(processor, end)) 229 return -EINVAL; 230 231 acpi_table_print_madt_entry(header); 232 233 apic_id = processor->local_apic_id; 234 enabled = processor->lapic_flags & ACPI_MADT_ENABLED; 235 #ifdef CONFIG_X86_X2APIC 236 /* 237 * We need to register disabled CPU as well to permit 238 * counting disabled CPUs. This allows us to size 239 * cpus_possible_map more accurately, to permit 240 * to not preallocating memory for all NR_CPUS 241 * when we use CPU hotplug. 242 */ 243 if (!apic->apic_id_valid(apic_id) && enabled) 244 printk(KERN_WARNING PREFIX "x2apic entry ignored\n"); 245 else 246 acpi_register_lapic(apic_id, enabled); 247 #else 248 printk(KERN_WARNING PREFIX "x2apic entry ignored\n"); 249 #endif 250 251 return 0; 252 } 253 254 static int __init 255 acpi_parse_lapic(struct acpi_subtable_header * header, const unsigned long end) 256 { 257 struct acpi_madt_local_apic *processor = NULL; 258 259 processor = (struct acpi_madt_local_apic *)header; 260 261 if (BAD_MADT_ENTRY(processor, end)) 262 return -EINVAL; 263 264 acpi_table_print_madt_entry(header); 265 266 /* 267 * We need to register disabled CPU as well to permit 268 * counting disabled CPUs. This allows us to size 269 * cpus_possible_map more accurately, to permit 270 * to not preallocating memory for all NR_CPUS 271 * when we use CPU hotplug. 272 */ 273 acpi_register_lapic(processor->id, /* APIC ID */ 274 processor->lapic_flags & ACPI_MADT_ENABLED); 275 276 return 0; 277 } 278 279 static int __init 280 acpi_parse_sapic(struct acpi_subtable_header *header, const unsigned long end) 281 { 282 struct acpi_madt_local_sapic *processor = NULL; 283 284 processor = (struct acpi_madt_local_sapic *)header; 285 286 if (BAD_MADT_ENTRY(processor, end)) 287 return -EINVAL; 288 289 acpi_table_print_madt_entry(header); 290 291 acpi_register_lapic((processor->id << 8) | processor->eid,/* APIC ID */ 292 processor->lapic_flags & ACPI_MADT_ENABLED); 293 294 return 0; 295 } 296 297 static int __init 298 acpi_parse_lapic_addr_ovr(struct acpi_subtable_header * header, 299 const unsigned long end) 300 { 301 struct acpi_madt_local_apic_override *lapic_addr_ovr = NULL; 302 303 lapic_addr_ovr = (struct acpi_madt_local_apic_override *)header; 304 305 if (BAD_MADT_ENTRY(lapic_addr_ovr, end)) 306 return -EINVAL; 307 308 acpi_lapic_addr = lapic_addr_ovr->address; 309 310 return 0; 311 } 312 313 static int __init 314 acpi_parse_x2apic_nmi(struct acpi_subtable_header *header, 315 const unsigned long end) 316 { 317 struct acpi_madt_local_x2apic_nmi *x2apic_nmi = NULL; 318 319 x2apic_nmi = (struct acpi_madt_local_x2apic_nmi *)header; 320 321 if (BAD_MADT_ENTRY(x2apic_nmi, end)) 322 return -EINVAL; 323 324 acpi_table_print_madt_entry(header); 325 326 if (x2apic_nmi->lint != 1) 327 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n"); 328 329 return 0; 330 } 331 332 static int __init 333 acpi_parse_lapic_nmi(struct acpi_subtable_header * header, const unsigned long end) 334 { 335 struct acpi_madt_local_apic_nmi *lapic_nmi = NULL; 336 337 lapic_nmi = (struct acpi_madt_local_apic_nmi *)header; 338 339 if (BAD_MADT_ENTRY(lapic_nmi, end)) 340 return -EINVAL; 341 342 acpi_table_print_madt_entry(header); 343 344 if (lapic_nmi->lint != 1) 345 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n"); 346 347 return 0; 348 } 349 350 #endif /*CONFIG_X86_LOCAL_APIC */ 351 352 #ifdef CONFIG_X86_IO_APIC 353 354 static int __init 355 acpi_parse_ioapic(struct acpi_subtable_header * header, const unsigned long end) 356 { 357 struct acpi_madt_io_apic *ioapic = NULL; 358 359 ioapic = (struct acpi_madt_io_apic *)header; 360 361 if (BAD_MADT_ENTRY(ioapic, end)) 362 return -EINVAL; 363 364 acpi_table_print_madt_entry(header); 365 366 mp_register_ioapic(ioapic->id, 367 ioapic->address, ioapic->global_irq_base); 368 369 return 0; 370 } 371 372 /* 373 * Parse Interrupt Source Override for the ACPI SCI 374 */ 375 static void __init acpi_sci_ioapic_setup(u8 bus_irq, u16 polarity, u16 trigger, u32 gsi) 376 { 377 if (trigger == 0) /* compatible SCI trigger is level */ 378 trigger = 3; 379 380 if (polarity == 0) /* compatible SCI polarity is low */ 381 polarity = 3; 382 383 /* Command-line over-ride via acpi_sci= */ 384 if (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) 385 trigger = (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2; 386 387 if (acpi_sci_flags & ACPI_MADT_POLARITY_MASK) 388 polarity = acpi_sci_flags & ACPI_MADT_POLARITY_MASK; 389 390 /* 391 * mp_config_acpi_legacy_irqs() already setup IRQs < 16 392 * If GSI is < 16, this will update its flags, 393 * else it will create a new mp_irqs[] entry. 394 */ 395 mp_override_legacy_irq(bus_irq, polarity, trigger, gsi); 396 397 /* 398 * stash over-ride to indicate we've been here 399 * and for later update of acpi_gbl_FADT 400 */ 401 acpi_sci_override_gsi = gsi; 402 return; 403 } 404 405 static int __init 406 acpi_parse_int_src_ovr(struct acpi_subtable_header * header, 407 const unsigned long end) 408 { 409 struct acpi_madt_interrupt_override *intsrc = NULL; 410 411 intsrc = (struct acpi_madt_interrupt_override *)header; 412 413 if (BAD_MADT_ENTRY(intsrc, end)) 414 return -EINVAL; 415 416 acpi_table_print_madt_entry(header); 417 418 if (intsrc->source_irq == acpi_gbl_FADT.sci_interrupt) { 419 acpi_sci_ioapic_setup(intsrc->source_irq, 420 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK, 421 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2, 422 intsrc->global_irq); 423 return 0; 424 } 425 426 if (intsrc->source_irq == 0) { 427 if (acpi_skip_timer_override) { 428 printk(PREFIX "BIOS IRQ0 override ignored.\n"); 429 return 0; 430 } 431 432 if ((intsrc->global_irq == 2) && acpi_fix_pin2_polarity 433 && (intsrc->inti_flags & ACPI_MADT_POLARITY_MASK)) { 434 intsrc->inti_flags &= ~ACPI_MADT_POLARITY_MASK; 435 printk(PREFIX "BIOS IRQ0 pin2 override: forcing polarity to high active.\n"); 436 } 437 } 438 439 mp_override_legacy_irq(intsrc->source_irq, 440 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK, 441 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2, 442 intsrc->global_irq); 443 444 return 0; 445 } 446 447 static int __init 448 acpi_parse_nmi_src(struct acpi_subtable_header * header, const unsigned long end) 449 { 450 struct acpi_madt_nmi_source *nmi_src = NULL; 451 452 nmi_src = (struct acpi_madt_nmi_source *)header; 453 454 if (BAD_MADT_ENTRY(nmi_src, end)) 455 return -EINVAL; 456 457 acpi_table_print_madt_entry(header); 458 459 /* TBD: Support nimsrc entries? */ 460 461 return 0; 462 } 463 464 #endif /* CONFIG_X86_IO_APIC */ 465 466 /* 467 * acpi_pic_sci_set_trigger() 468 * 469 * use ELCR to set PIC-mode trigger type for SCI 470 * 471 * If a PIC-mode SCI is not recognized or gives spurious IRQ7's 472 * it may require Edge Trigger -- use "acpi_sci=edge" 473 * 474 * Port 0x4d0-4d1 are ECLR1 and ECLR2, the Edge/Level Control Registers 475 * for the 8259 PIC. bit[n] = 1 means irq[n] is Level, otherwise Edge. 476 * ECLR1 is IRQs 0-7 (IRQ 0, 1, 2 must be 0) 477 * ECLR2 is IRQs 8-15 (IRQ 8, 13 must be 0) 478 */ 479 480 void __init acpi_pic_sci_set_trigger(unsigned int irq, u16 trigger) 481 { 482 unsigned int mask = 1 << irq; 483 unsigned int old, new; 484 485 /* Real old ELCR mask */ 486 old = inb(0x4d0) | (inb(0x4d1) << 8); 487 488 /* 489 * If we use ACPI to set PCI IRQs, then we should clear ELCR 490 * since we will set it correctly as we enable the PCI irq 491 * routing. 492 */ 493 new = acpi_noirq ? old : 0; 494 495 /* 496 * Update SCI information in the ELCR, it isn't in the PCI 497 * routing tables.. 498 */ 499 switch (trigger) { 500 case 1: /* Edge - clear */ 501 new &= ~mask; 502 break; 503 case 3: /* Level - set */ 504 new |= mask; 505 break; 506 } 507 508 if (old == new) 509 return; 510 511 printk(PREFIX "setting ELCR to %04x (from %04x)\n", new, old); 512 outb(new, 0x4d0); 513 outb(new >> 8, 0x4d1); 514 } 515 516 int acpi_gsi_to_irq(u32 gsi, unsigned int *irq) 517 { 518 *irq = gsi_to_irq(gsi); 519 520 #ifdef CONFIG_X86_IO_APIC 521 if (acpi_irq_model == ACPI_IRQ_MODEL_IOAPIC) 522 setup_IO_APIC_irq_extra(gsi); 523 #endif 524 525 return 0; 526 } 527 EXPORT_SYMBOL_GPL(acpi_gsi_to_irq); 528 529 int acpi_isa_irq_to_gsi(unsigned isa_irq, u32 *gsi) 530 { 531 if (isa_irq >= 16) 532 return -1; 533 *gsi = irq_to_gsi(isa_irq); 534 return 0; 535 } 536 537 static int acpi_register_gsi_pic(struct device *dev, u32 gsi, 538 int trigger, int polarity) 539 { 540 #ifdef CONFIG_PCI 541 /* 542 * Make sure all (legacy) PCI IRQs are set as level-triggered. 543 */ 544 if (trigger == ACPI_LEVEL_SENSITIVE) 545 eisa_set_level_irq(gsi); 546 #endif 547 548 return gsi; 549 } 550 551 static int acpi_register_gsi_ioapic(struct device *dev, u32 gsi, 552 int trigger, int polarity) 553 { 554 #ifdef CONFIG_X86_IO_APIC 555 gsi = mp_register_gsi(dev, gsi, trigger, polarity); 556 #endif 557 558 return gsi; 559 } 560 561 int (*__acpi_register_gsi)(struct device *dev, u32 gsi, 562 int trigger, int polarity) = acpi_register_gsi_pic; 563 564 #ifdef CONFIG_ACPI_SLEEP 565 int (*acpi_suspend_lowlevel)(void) = x86_acpi_suspend_lowlevel; 566 #else 567 int (*acpi_suspend_lowlevel)(void); 568 #endif 569 570 /* 571 * success: return IRQ number (>=0) 572 * failure: return < 0 573 */ 574 int acpi_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity) 575 { 576 unsigned int irq; 577 unsigned int plat_gsi = gsi; 578 579 plat_gsi = (*__acpi_register_gsi)(dev, gsi, trigger, polarity); 580 irq = gsi_to_irq(plat_gsi); 581 582 return irq; 583 } 584 EXPORT_SYMBOL_GPL(acpi_register_gsi); 585 586 void acpi_unregister_gsi(u32 gsi) 587 { 588 } 589 EXPORT_SYMBOL_GPL(acpi_unregister_gsi); 590 591 void __init acpi_set_irq_model_pic(void) 592 { 593 acpi_irq_model = ACPI_IRQ_MODEL_PIC; 594 __acpi_register_gsi = acpi_register_gsi_pic; 595 acpi_ioapic = 0; 596 } 597 598 void __init acpi_set_irq_model_ioapic(void) 599 { 600 acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC; 601 __acpi_register_gsi = acpi_register_gsi_ioapic; 602 acpi_ioapic = 1; 603 } 604 605 /* 606 * ACPI based hotplug support for CPU 607 */ 608 #ifdef CONFIG_ACPI_HOTPLUG_CPU 609 #include <acpi/processor.h> 610 611 static void acpi_map_cpu2node(acpi_handle handle, int cpu, int physid) 612 { 613 #ifdef CONFIG_ACPI_NUMA 614 int nid; 615 616 nid = acpi_get_node(handle); 617 if (nid == -1 || !node_online(nid)) 618 return; 619 set_apicid_to_node(physid, nid); 620 numa_set_node(cpu, nid); 621 #endif 622 } 623 624 static int _acpi_map_lsapic(acpi_handle handle, int physid, int *pcpu) 625 { 626 int cpu; 627 628 cpu = acpi_register_lapic(physid, ACPI_MADT_ENABLED); 629 if (cpu < 0) { 630 pr_info(PREFIX "Unable to map lapic to logical cpu number\n"); 631 return cpu; 632 } 633 634 acpi_processor_set_pdc(handle); 635 acpi_map_cpu2node(handle, cpu, physid); 636 637 *pcpu = cpu; 638 return 0; 639 } 640 641 /* wrapper to silence section mismatch warning */ 642 int __ref acpi_map_lsapic(acpi_handle handle, int physid, int *pcpu) 643 { 644 return _acpi_map_lsapic(handle, physid, pcpu); 645 } 646 EXPORT_SYMBOL(acpi_map_lsapic); 647 648 int acpi_unmap_lsapic(int cpu) 649 { 650 #ifdef CONFIG_ACPI_NUMA 651 set_apicid_to_node(per_cpu(x86_cpu_to_apicid, cpu), NUMA_NO_NODE); 652 #endif 653 654 per_cpu(x86_cpu_to_apicid, cpu) = -1; 655 set_cpu_present(cpu, false); 656 num_processors--; 657 658 return (0); 659 } 660 661 EXPORT_SYMBOL(acpi_unmap_lsapic); 662 #endif /* CONFIG_ACPI_HOTPLUG_CPU */ 663 664 int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base) 665 { 666 /* TBD */ 667 return -EINVAL; 668 } 669 670 EXPORT_SYMBOL(acpi_register_ioapic); 671 672 int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base) 673 { 674 /* TBD */ 675 return -EINVAL; 676 } 677 678 EXPORT_SYMBOL(acpi_unregister_ioapic); 679 680 static int __init acpi_parse_sbf(struct acpi_table_header *table) 681 { 682 struct acpi_table_boot *sb; 683 684 sb = (struct acpi_table_boot *)table; 685 if (!sb) { 686 printk(KERN_WARNING PREFIX "Unable to map SBF\n"); 687 return -ENODEV; 688 } 689 690 sbf_port = sb->cmos_index; /* Save CMOS port */ 691 692 return 0; 693 } 694 695 #ifdef CONFIG_HPET_TIMER 696 #include <asm/hpet.h> 697 698 static struct resource *hpet_res __initdata; 699 700 static int __init acpi_parse_hpet(struct acpi_table_header *table) 701 { 702 struct acpi_table_hpet *hpet_tbl; 703 704 hpet_tbl = (struct acpi_table_hpet *)table; 705 if (!hpet_tbl) { 706 printk(KERN_WARNING PREFIX "Unable to map HPET\n"); 707 return -ENODEV; 708 } 709 710 if (hpet_tbl->address.space_id != ACPI_SPACE_MEM) { 711 printk(KERN_WARNING PREFIX "HPET timers must be located in " 712 "memory.\n"); 713 return -1; 714 } 715 716 hpet_address = hpet_tbl->address.address; 717 hpet_blockid = hpet_tbl->sequence; 718 719 /* 720 * Some broken BIOSes advertise HPET at 0x0. We really do not 721 * want to allocate a resource there. 722 */ 723 if (!hpet_address) { 724 printk(KERN_WARNING PREFIX 725 "HPET id: %#x base: %#lx is invalid\n", 726 hpet_tbl->id, hpet_address); 727 return 0; 728 } 729 #ifdef CONFIG_X86_64 730 /* 731 * Some even more broken BIOSes advertise HPET at 732 * 0xfed0000000000000 instead of 0xfed00000. Fix it up and add 733 * some noise: 734 */ 735 if (hpet_address == 0xfed0000000000000UL) { 736 if (!hpet_force_user) { 737 printk(KERN_WARNING PREFIX "HPET id: %#x " 738 "base: 0xfed0000000000000 is bogus\n " 739 "try hpet=force on the kernel command line to " 740 "fix it up to 0xfed00000.\n", hpet_tbl->id); 741 hpet_address = 0; 742 return 0; 743 } 744 printk(KERN_WARNING PREFIX 745 "HPET id: %#x base: 0xfed0000000000000 fixed up " 746 "to 0xfed00000.\n", hpet_tbl->id); 747 hpet_address >>= 32; 748 } 749 #endif 750 printk(KERN_INFO PREFIX "HPET id: %#x base: %#lx\n", 751 hpet_tbl->id, hpet_address); 752 753 /* 754 * Allocate and initialize the HPET firmware resource for adding into 755 * the resource tree during the lateinit timeframe. 756 */ 757 #define HPET_RESOURCE_NAME_SIZE 9 758 hpet_res = alloc_bootmem(sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE); 759 760 hpet_res->name = (void *)&hpet_res[1]; 761 hpet_res->flags = IORESOURCE_MEM; 762 snprintf((char *)hpet_res->name, HPET_RESOURCE_NAME_SIZE, "HPET %u", 763 hpet_tbl->sequence); 764 765 hpet_res->start = hpet_address; 766 hpet_res->end = hpet_address + (1 * 1024) - 1; 767 768 return 0; 769 } 770 771 /* 772 * hpet_insert_resource inserts the HPET resources used into the resource 773 * tree. 774 */ 775 static __init int hpet_insert_resource(void) 776 { 777 if (!hpet_res) 778 return 1; 779 780 return insert_resource(&iomem_resource, hpet_res); 781 } 782 783 late_initcall(hpet_insert_resource); 784 785 #else 786 #define acpi_parse_hpet NULL 787 #endif 788 789 static int __init acpi_parse_fadt(struct acpi_table_header *table) 790 { 791 792 #ifdef CONFIG_X86_PM_TIMER 793 /* detect the location of the ACPI PM Timer */ 794 if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID) { 795 /* FADT rev. 2 */ 796 if (acpi_gbl_FADT.xpm_timer_block.space_id != 797 ACPI_ADR_SPACE_SYSTEM_IO) 798 return 0; 799 800 pmtmr_ioport = acpi_gbl_FADT.xpm_timer_block.address; 801 /* 802 * "X" fields are optional extensions to the original V1.0 803 * fields, so we must selectively expand V1.0 fields if the 804 * corresponding X field is zero. 805 */ 806 if (!pmtmr_ioport) 807 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block; 808 } else { 809 /* FADT rev. 1 */ 810 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block; 811 } 812 if (pmtmr_ioport) 813 printk(KERN_INFO PREFIX "PM-Timer IO Port: %#x\n", 814 pmtmr_ioport); 815 #endif 816 return 0; 817 } 818 819 #ifdef CONFIG_X86_LOCAL_APIC 820 /* 821 * Parse LAPIC entries in MADT 822 * returns 0 on success, < 0 on error 823 */ 824 825 static int __init early_acpi_parse_madt_lapic_addr_ovr(void) 826 { 827 int count; 828 829 if (!cpu_has_apic) 830 return -ENODEV; 831 832 /* 833 * Note that the LAPIC address is obtained from the MADT (32-bit value) 834 * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value). 835 */ 836 837 count = 838 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE, 839 acpi_parse_lapic_addr_ovr, 0); 840 if (count < 0) { 841 printk(KERN_ERR PREFIX 842 "Error parsing LAPIC address override entry\n"); 843 return count; 844 } 845 846 register_lapic_address(acpi_lapic_addr); 847 848 return count; 849 } 850 851 static int __init acpi_parse_madt_lapic_entries(void) 852 { 853 int count; 854 int x2count = 0; 855 856 if (!cpu_has_apic) 857 return -ENODEV; 858 859 /* 860 * Note that the LAPIC address is obtained from the MADT (32-bit value) 861 * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value). 862 */ 863 864 count = 865 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE, 866 acpi_parse_lapic_addr_ovr, 0); 867 if (count < 0) { 868 printk(KERN_ERR PREFIX 869 "Error parsing LAPIC address override entry\n"); 870 return count; 871 } 872 873 register_lapic_address(acpi_lapic_addr); 874 875 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC, 876 acpi_parse_sapic, MAX_LOCAL_APIC); 877 878 if (!count) { 879 x2count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC, 880 acpi_parse_x2apic, MAX_LOCAL_APIC); 881 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC, 882 acpi_parse_lapic, MAX_LOCAL_APIC); 883 } 884 if (!count && !x2count) { 885 printk(KERN_ERR PREFIX "No LAPIC entries present\n"); 886 /* TBD: Cleanup to allow fallback to MPS */ 887 return -ENODEV; 888 } else if (count < 0 || x2count < 0) { 889 printk(KERN_ERR PREFIX "Error parsing LAPIC entry\n"); 890 /* TBD: Cleanup to allow fallback to MPS */ 891 return count; 892 } 893 894 x2count = 895 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC_NMI, 896 acpi_parse_x2apic_nmi, 0); 897 count = 898 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI, acpi_parse_lapic_nmi, 0); 899 if (count < 0 || x2count < 0) { 900 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n"); 901 /* TBD: Cleanup to allow fallback to MPS */ 902 return count; 903 } 904 return 0; 905 } 906 #endif /* CONFIG_X86_LOCAL_APIC */ 907 908 #ifdef CONFIG_X86_IO_APIC 909 #define MP_ISA_BUS 0 910 911 #ifdef CONFIG_X86_ES7000 912 extern int es7000_plat; 913 #endif 914 915 void __init mp_override_legacy_irq(u8 bus_irq, u8 polarity, u8 trigger, u32 gsi) 916 { 917 int ioapic; 918 int pin; 919 struct mpc_intsrc mp_irq; 920 921 /* 922 * Convert 'gsi' to 'ioapic.pin'. 923 */ 924 ioapic = mp_find_ioapic(gsi); 925 if (ioapic < 0) 926 return; 927 pin = mp_find_ioapic_pin(ioapic, gsi); 928 929 /* 930 * TBD: This check is for faulty timer entries, where the override 931 * erroneously sets the trigger to level, resulting in a HUGE 932 * increase of timer interrupts! 933 */ 934 if ((bus_irq == 0) && (trigger == 3)) 935 trigger = 1; 936 937 mp_irq.type = MP_INTSRC; 938 mp_irq.irqtype = mp_INT; 939 mp_irq.irqflag = (trigger << 2) | polarity; 940 mp_irq.srcbus = MP_ISA_BUS; 941 mp_irq.srcbusirq = bus_irq; /* IRQ */ 942 mp_irq.dstapic = mpc_ioapic_id(ioapic); /* APIC ID */ 943 mp_irq.dstirq = pin; /* INTIN# */ 944 945 mp_save_irq(&mp_irq); 946 947 isa_irq_to_gsi[bus_irq] = gsi; 948 } 949 950 void __init mp_config_acpi_legacy_irqs(void) 951 { 952 int i; 953 struct mpc_intsrc mp_irq; 954 955 #ifdef CONFIG_EISA 956 /* 957 * Fabricate the legacy ISA bus (bus #31). 958 */ 959 mp_bus_id_to_type[MP_ISA_BUS] = MP_BUS_ISA; 960 #endif 961 set_bit(MP_ISA_BUS, mp_bus_not_pci); 962 pr_debug("Bus #%d is ISA\n", MP_ISA_BUS); 963 964 #ifdef CONFIG_X86_ES7000 965 /* 966 * Older generations of ES7000 have no legacy identity mappings 967 */ 968 if (es7000_plat == 1) 969 return; 970 #endif 971 972 /* 973 * Use the default configuration for the IRQs 0-15. Unless 974 * overridden by (MADT) interrupt source override entries. 975 */ 976 for (i = 0; i < 16; i++) { 977 int ioapic, pin; 978 unsigned int dstapic; 979 int idx; 980 u32 gsi; 981 982 /* Locate the gsi that irq i maps to. */ 983 if (acpi_isa_irq_to_gsi(i, &gsi)) 984 continue; 985 986 /* 987 * Locate the IOAPIC that manages the ISA IRQ. 988 */ 989 ioapic = mp_find_ioapic(gsi); 990 if (ioapic < 0) 991 continue; 992 pin = mp_find_ioapic_pin(ioapic, gsi); 993 dstapic = mpc_ioapic_id(ioapic); 994 995 for (idx = 0; idx < mp_irq_entries; idx++) { 996 struct mpc_intsrc *irq = mp_irqs + idx; 997 998 /* Do we already have a mapping for this ISA IRQ? */ 999 if (irq->srcbus == MP_ISA_BUS && irq->srcbusirq == i) 1000 break; 1001 1002 /* Do we already have a mapping for this IOAPIC pin */ 1003 if (irq->dstapic == dstapic && irq->dstirq == pin) 1004 break; 1005 } 1006 1007 if (idx != mp_irq_entries) { 1008 printk(KERN_DEBUG "ACPI: IRQ%d used by override.\n", i); 1009 continue; /* IRQ already used */ 1010 } 1011 1012 mp_irq.type = MP_INTSRC; 1013 mp_irq.irqflag = 0; /* Conforming */ 1014 mp_irq.srcbus = MP_ISA_BUS; 1015 mp_irq.dstapic = dstapic; 1016 mp_irq.irqtype = mp_INT; 1017 mp_irq.srcbusirq = i; /* Identity mapped */ 1018 mp_irq.dstirq = pin; 1019 1020 mp_save_irq(&mp_irq); 1021 } 1022 } 1023 1024 static int mp_config_acpi_gsi(struct device *dev, u32 gsi, int trigger, 1025 int polarity) 1026 { 1027 #ifdef CONFIG_X86_MPPARSE 1028 struct mpc_intsrc mp_irq; 1029 struct pci_dev *pdev; 1030 unsigned char number; 1031 unsigned int devfn; 1032 int ioapic; 1033 u8 pin; 1034 1035 if (!acpi_ioapic) 1036 return 0; 1037 if (!dev) 1038 return 0; 1039 if (dev->bus != &pci_bus_type) 1040 return 0; 1041 1042 pdev = to_pci_dev(dev); 1043 number = pdev->bus->number; 1044 devfn = pdev->devfn; 1045 pin = pdev->pin; 1046 /* print the entry should happen on mptable identically */ 1047 mp_irq.type = MP_INTSRC; 1048 mp_irq.irqtype = mp_INT; 1049 mp_irq.irqflag = (trigger == ACPI_EDGE_SENSITIVE ? 4 : 0x0c) | 1050 (polarity == ACPI_ACTIVE_HIGH ? 1 : 3); 1051 mp_irq.srcbus = number; 1052 mp_irq.srcbusirq = (((devfn >> 3) & 0x1f) << 2) | ((pin - 1) & 3); 1053 ioapic = mp_find_ioapic(gsi); 1054 mp_irq.dstapic = mpc_ioapic_id(ioapic); 1055 mp_irq.dstirq = mp_find_ioapic_pin(ioapic, gsi); 1056 1057 mp_save_irq(&mp_irq); 1058 #endif 1059 return 0; 1060 } 1061 1062 int mp_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity) 1063 { 1064 int ioapic; 1065 int ioapic_pin; 1066 struct io_apic_irq_attr irq_attr; 1067 int ret; 1068 1069 if (acpi_irq_model != ACPI_IRQ_MODEL_IOAPIC) 1070 return gsi; 1071 1072 /* Don't set up the ACPI SCI because it's already set up */ 1073 if (acpi_gbl_FADT.sci_interrupt == gsi) 1074 return gsi; 1075 1076 ioapic = mp_find_ioapic(gsi); 1077 if (ioapic < 0) { 1078 printk(KERN_WARNING "No IOAPIC for GSI %u\n", gsi); 1079 return gsi; 1080 } 1081 1082 ioapic_pin = mp_find_ioapic_pin(ioapic, gsi); 1083 1084 if (ioapic_pin > MP_MAX_IOAPIC_PIN) { 1085 printk(KERN_ERR "Invalid reference to IOAPIC pin " 1086 "%d-%d\n", mpc_ioapic_id(ioapic), 1087 ioapic_pin); 1088 return gsi; 1089 } 1090 1091 if (enable_update_mptable) 1092 mp_config_acpi_gsi(dev, gsi, trigger, polarity); 1093 1094 set_io_apic_irq_attr(&irq_attr, ioapic, ioapic_pin, 1095 trigger == ACPI_EDGE_SENSITIVE ? 0 : 1, 1096 polarity == ACPI_ACTIVE_HIGH ? 0 : 1); 1097 ret = io_apic_set_pci_routing(dev, gsi_to_irq(gsi), &irq_attr); 1098 if (ret < 0) 1099 gsi = INT_MIN; 1100 1101 return gsi; 1102 } 1103 1104 /* 1105 * Parse IOAPIC related entries in MADT 1106 * returns 0 on success, < 0 on error 1107 */ 1108 static int __init acpi_parse_madt_ioapic_entries(void) 1109 { 1110 int count; 1111 1112 /* 1113 * ACPI interpreter is required to complete interrupt setup, 1114 * so if it is off, don't enumerate the io-apics with ACPI. 1115 * If MPS is present, it will handle them, 1116 * otherwise the system will stay in PIC mode 1117 */ 1118 if (acpi_disabled || acpi_noirq) 1119 return -ENODEV; 1120 1121 if (!cpu_has_apic) 1122 return -ENODEV; 1123 1124 /* 1125 * if "noapic" boot option, don't look for IO-APICs 1126 */ 1127 if (skip_ioapic_setup) { 1128 printk(KERN_INFO PREFIX "Skipping IOAPIC probe " 1129 "due to 'noapic' option.\n"); 1130 return -ENODEV; 1131 } 1132 1133 count = 1134 acpi_table_parse_madt(ACPI_MADT_TYPE_IO_APIC, acpi_parse_ioapic, 1135 MAX_IO_APICS); 1136 if (!count) { 1137 printk(KERN_ERR PREFIX "No IOAPIC entries present\n"); 1138 return -ENODEV; 1139 } else if (count < 0) { 1140 printk(KERN_ERR PREFIX "Error parsing IOAPIC entry\n"); 1141 return count; 1142 } 1143 1144 count = 1145 acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE, acpi_parse_int_src_ovr, 1146 nr_irqs); 1147 if (count < 0) { 1148 printk(KERN_ERR PREFIX 1149 "Error parsing interrupt source overrides entry\n"); 1150 /* TBD: Cleanup to allow fallback to MPS */ 1151 return count; 1152 } 1153 1154 /* 1155 * If BIOS did not supply an INT_SRC_OVR for the SCI 1156 * pretend we got one so we can set the SCI flags. 1157 */ 1158 if (!acpi_sci_override_gsi) 1159 acpi_sci_ioapic_setup(acpi_gbl_FADT.sci_interrupt, 0, 0, 1160 acpi_gbl_FADT.sci_interrupt); 1161 1162 /* Fill in identity legacy mappings where no override */ 1163 mp_config_acpi_legacy_irqs(); 1164 1165 count = 1166 acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE, acpi_parse_nmi_src, 1167 nr_irqs); 1168 if (count < 0) { 1169 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n"); 1170 /* TBD: Cleanup to allow fallback to MPS */ 1171 return count; 1172 } 1173 1174 return 0; 1175 } 1176 #else 1177 static inline int acpi_parse_madt_ioapic_entries(void) 1178 { 1179 return -1; 1180 } 1181 #endif /* !CONFIG_X86_IO_APIC */ 1182 1183 static void __init early_acpi_process_madt(void) 1184 { 1185 #ifdef CONFIG_X86_LOCAL_APIC 1186 int error; 1187 1188 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) { 1189 1190 /* 1191 * Parse MADT LAPIC entries 1192 */ 1193 error = early_acpi_parse_madt_lapic_addr_ovr(); 1194 if (!error) { 1195 acpi_lapic = 1; 1196 smp_found_config = 1; 1197 } 1198 if (error == -EINVAL) { 1199 /* 1200 * Dell Precision Workstation 410, 610 come here. 1201 */ 1202 printk(KERN_ERR PREFIX 1203 "Invalid BIOS MADT, disabling ACPI\n"); 1204 disable_acpi(); 1205 } 1206 } 1207 #endif 1208 } 1209 1210 static void __init acpi_process_madt(void) 1211 { 1212 #ifdef CONFIG_X86_LOCAL_APIC 1213 int error; 1214 1215 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) { 1216 1217 /* 1218 * Parse MADT LAPIC entries 1219 */ 1220 error = acpi_parse_madt_lapic_entries(); 1221 if (!error) { 1222 acpi_lapic = 1; 1223 1224 /* 1225 * Parse MADT IO-APIC entries 1226 */ 1227 error = acpi_parse_madt_ioapic_entries(); 1228 if (!error) { 1229 acpi_set_irq_model_ioapic(); 1230 1231 smp_found_config = 1; 1232 } 1233 } 1234 if (error == -EINVAL) { 1235 /* 1236 * Dell Precision Workstation 410, 610 come here. 1237 */ 1238 printk(KERN_ERR PREFIX 1239 "Invalid BIOS MADT, disabling ACPI\n"); 1240 disable_acpi(); 1241 } 1242 } else { 1243 /* 1244 * ACPI found no MADT, and so ACPI wants UP PIC mode. 1245 * In the event an MPS table was found, forget it. 1246 * Boot with "acpi=off" to use MPS on such a system. 1247 */ 1248 if (smp_found_config) { 1249 printk(KERN_WARNING PREFIX 1250 "No APIC-table, disabling MPS\n"); 1251 smp_found_config = 0; 1252 } 1253 } 1254 1255 /* 1256 * ACPI supports both logical (e.g. Hyper-Threading) and physical 1257 * processors, where MPS only supports physical. 1258 */ 1259 if (acpi_lapic && acpi_ioapic) 1260 printk(KERN_INFO "Using ACPI (MADT) for SMP configuration " 1261 "information\n"); 1262 else if (acpi_lapic) 1263 printk(KERN_INFO "Using ACPI for processor (LAPIC) " 1264 "configuration information\n"); 1265 #endif 1266 return; 1267 } 1268 1269 static int __init disable_acpi_irq(const struct dmi_system_id *d) 1270 { 1271 if (!acpi_force) { 1272 printk(KERN_NOTICE "%s detected: force use of acpi=noirq\n", 1273 d->ident); 1274 acpi_noirq_set(); 1275 } 1276 return 0; 1277 } 1278 1279 static int __init disable_acpi_pci(const struct dmi_system_id *d) 1280 { 1281 if (!acpi_force) { 1282 printk(KERN_NOTICE "%s detected: force use of pci=noacpi\n", 1283 d->ident); 1284 acpi_disable_pci(); 1285 } 1286 return 0; 1287 } 1288 1289 static int __init dmi_disable_acpi(const struct dmi_system_id *d) 1290 { 1291 if (!acpi_force) { 1292 printk(KERN_NOTICE "%s detected: acpi off\n", d->ident); 1293 disable_acpi(); 1294 } else { 1295 printk(KERN_NOTICE 1296 "Warning: DMI blacklist says broken, but acpi forced\n"); 1297 } 1298 return 0; 1299 } 1300 1301 /* 1302 * Force ignoring BIOS IRQ0 override 1303 */ 1304 static int __init dmi_ignore_irq0_timer_override(const struct dmi_system_id *d) 1305 { 1306 if (!acpi_skip_timer_override) { 1307 pr_notice("%s detected: Ignoring BIOS IRQ0 override\n", 1308 d->ident); 1309 acpi_skip_timer_override = 1; 1310 } 1311 return 0; 1312 } 1313 1314 /* 1315 * If your system is blacklisted here, but you find that acpi=force 1316 * works for you, please contact linux-acpi@vger.kernel.org 1317 */ 1318 static struct dmi_system_id __initdata acpi_dmi_table[] = { 1319 /* 1320 * Boxes that need ACPI disabled 1321 */ 1322 { 1323 .callback = dmi_disable_acpi, 1324 .ident = "IBM Thinkpad", 1325 .matches = { 1326 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), 1327 DMI_MATCH(DMI_BOARD_NAME, "2629H1G"), 1328 }, 1329 }, 1330 1331 /* 1332 * Boxes that need ACPI PCI IRQ routing disabled 1333 */ 1334 { 1335 .callback = disable_acpi_irq, 1336 .ident = "ASUS A7V", 1337 .matches = { 1338 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC"), 1339 DMI_MATCH(DMI_BOARD_NAME, "<A7V>"), 1340 /* newer BIOS, Revision 1011, does work */ 1341 DMI_MATCH(DMI_BIOS_VERSION, 1342 "ASUS A7V ACPI BIOS Revision 1007"), 1343 }, 1344 }, 1345 { 1346 /* 1347 * Latest BIOS for IBM 600E (1.16) has bad pcinum 1348 * for LPC bridge, which is needed for the PCI 1349 * interrupt links to work. DSDT fix is in bug 5966. 1350 * 2645, 2646 model numbers are shared with 600/600E/600X 1351 */ 1352 .callback = disable_acpi_irq, 1353 .ident = "IBM Thinkpad 600 Series 2645", 1354 .matches = { 1355 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), 1356 DMI_MATCH(DMI_BOARD_NAME, "2645"), 1357 }, 1358 }, 1359 { 1360 .callback = disable_acpi_irq, 1361 .ident = "IBM Thinkpad 600 Series 2646", 1362 .matches = { 1363 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), 1364 DMI_MATCH(DMI_BOARD_NAME, "2646"), 1365 }, 1366 }, 1367 /* 1368 * Boxes that need ACPI PCI IRQ routing and PCI scan disabled 1369 */ 1370 { /* _BBN 0 bug */ 1371 .callback = disable_acpi_pci, 1372 .ident = "ASUS PR-DLS", 1373 .matches = { 1374 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."), 1375 DMI_MATCH(DMI_BOARD_NAME, "PR-DLS"), 1376 DMI_MATCH(DMI_BIOS_VERSION, 1377 "ASUS PR-DLS ACPI BIOS Revision 1010"), 1378 DMI_MATCH(DMI_BIOS_DATE, "03/21/2003") 1379 }, 1380 }, 1381 { 1382 .callback = disable_acpi_pci, 1383 .ident = "Acer TravelMate 36x Laptop", 1384 .matches = { 1385 DMI_MATCH(DMI_SYS_VENDOR, "Acer"), 1386 DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"), 1387 }, 1388 }, 1389 {} 1390 }; 1391 1392 /* second table for DMI checks that should run after early-quirks */ 1393 static struct dmi_system_id __initdata acpi_dmi_table_late[] = { 1394 /* 1395 * HP laptops which use a DSDT reporting as HP/SB400/10000, 1396 * which includes some code which overrides all temperature 1397 * trip points to 16C if the INTIN2 input of the I/O APIC 1398 * is enabled. This input is incorrectly designated the 1399 * ISA IRQ 0 via an interrupt source override even though 1400 * it is wired to the output of the master 8259A and INTIN0 1401 * is not connected at all. Force ignoring BIOS IRQ0 1402 * override in that cases. 1403 */ 1404 { 1405 .callback = dmi_ignore_irq0_timer_override, 1406 .ident = "HP nx6115 laptop", 1407 .matches = { 1408 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 1409 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6115"), 1410 }, 1411 }, 1412 { 1413 .callback = dmi_ignore_irq0_timer_override, 1414 .ident = "HP NX6125 laptop", 1415 .matches = { 1416 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 1417 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6125"), 1418 }, 1419 }, 1420 { 1421 .callback = dmi_ignore_irq0_timer_override, 1422 .ident = "HP NX6325 laptop", 1423 .matches = { 1424 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 1425 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6325"), 1426 }, 1427 }, 1428 { 1429 .callback = dmi_ignore_irq0_timer_override, 1430 .ident = "HP 6715b laptop", 1431 .matches = { 1432 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 1433 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq 6715b"), 1434 }, 1435 }, 1436 { 1437 .callback = dmi_ignore_irq0_timer_override, 1438 .ident = "FUJITSU SIEMENS", 1439 .matches = { 1440 DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"), 1441 DMI_MATCH(DMI_PRODUCT_NAME, "AMILO PRO V2030"), 1442 }, 1443 }, 1444 {} 1445 }; 1446 1447 /* 1448 * acpi_boot_table_init() and acpi_boot_init() 1449 * called from setup_arch(), always. 1450 * 1. checksums all tables 1451 * 2. enumerates lapics 1452 * 3. enumerates io-apics 1453 * 1454 * acpi_table_init() is separate to allow reading SRAT without 1455 * other side effects. 1456 * 1457 * side effects of acpi_boot_init: 1458 * acpi_lapic = 1 if LAPIC found 1459 * acpi_ioapic = 1 if IOAPIC found 1460 * if (acpi_lapic && acpi_ioapic) smp_found_config = 1; 1461 * if acpi_blacklisted() acpi_disabled = 1; 1462 * acpi_irq_model=... 1463 * ... 1464 */ 1465 1466 void __init acpi_boot_table_init(void) 1467 { 1468 dmi_check_system(acpi_dmi_table); 1469 1470 /* 1471 * If acpi_disabled, bail out 1472 */ 1473 if (acpi_disabled) 1474 return; 1475 1476 /* 1477 * Initialize the ACPI boot-time table parser. 1478 */ 1479 if (acpi_table_init()) { 1480 disable_acpi(); 1481 return; 1482 } 1483 1484 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf); 1485 1486 /* 1487 * blacklist may disable ACPI entirely 1488 */ 1489 if (acpi_blacklisted()) { 1490 if (acpi_force) { 1491 printk(KERN_WARNING PREFIX "acpi=force override\n"); 1492 } else { 1493 printk(KERN_WARNING PREFIX "Disabling ACPI support\n"); 1494 disable_acpi(); 1495 return; 1496 } 1497 } 1498 } 1499 1500 int __init early_acpi_boot_init(void) 1501 { 1502 /* 1503 * If acpi_disabled, bail out 1504 */ 1505 if (acpi_disabled) 1506 return 1; 1507 1508 /* 1509 * Process the Multiple APIC Description Table (MADT), if present 1510 */ 1511 early_acpi_process_madt(); 1512 1513 return 0; 1514 } 1515 1516 int __init acpi_boot_init(void) 1517 { 1518 /* those are executed after early-quirks are executed */ 1519 dmi_check_system(acpi_dmi_table_late); 1520 1521 /* 1522 * If acpi_disabled, bail out 1523 */ 1524 if (acpi_disabled) 1525 return 1; 1526 1527 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf); 1528 1529 /* 1530 * set sci_int and PM timer address 1531 */ 1532 acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt); 1533 1534 /* 1535 * Process the Multiple APIC Description Table (MADT), if present 1536 */ 1537 acpi_process_madt(); 1538 1539 acpi_table_parse(ACPI_SIG_HPET, acpi_parse_hpet); 1540 1541 if (!acpi_noirq) 1542 x86_init.pci.init = pci_acpi_init; 1543 1544 return 0; 1545 } 1546 1547 static int __init parse_acpi(char *arg) 1548 { 1549 if (!arg) 1550 return -EINVAL; 1551 1552 /* "acpi=off" disables both ACPI table parsing and interpreter */ 1553 if (strcmp(arg, "off") == 0) { 1554 disable_acpi(); 1555 } 1556 /* acpi=force to over-ride black-list */ 1557 else if (strcmp(arg, "force") == 0) { 1558 acpi_force = 1; 1559 acpi_disabled = 0; 1560 } 1561 /* acpi=strict disables out-of-spec workarounds */ 1562 else if (strcmp(arg, "strict") == 0) { 1563 acpi_strict = 1; 1564 } 1565 /* acpi=rsdt use RSDT instead of XSDT */ 1566 else if (strcmp(arg, "rsdt") == 0) { 1567 acpi_rsdt_forced = 1; 1568 } 1569 /* "acpi=noirq" disables ACPI interrupt routing */ 1570 else if (strcmp(arg, "noirq") == 0) { 1571 acpi_noirq_set(); 1572 } 1573 /* "acpi=copy_dsdt" copys DSDT */ 1574 else if (strcmp(arg, "copy_dsdt") == 0) { 1575 acpi_gbl_copy_dsdt_locally = 1; 1576 } 1577 /* "acpi=nocmcff" disables FF mode for corrected errors */ 1578 else if (strcmp(arg, "nocmcff") == 0) { 1579 acpi_disable_cmcff = 1; 1580 } else { 1581 /* Core will printk when we return error. */ 1582 return -EINVAL; 1583 } 1584 return 0; 1585 } 1586 early_param("acpi", parse_acpi); 1587 1588 /* FIXME: Using pci= for an ACPI parameter is a travesty. */ 1589 static int __init parse_pci(char *arg) 1590 { 1591 if (arg && strcmp(arg, "noacpi") == 0) 1592 acpi_disable_pci(); 1593 return 0; 1594 } 1595 early_param("pci", parse_pci); 1596 1597 int __init acpi_mps_check(void) 1598 { 1599 #if defined(CONFIG_X86_LOCAL_APIC) && !defined(CONFIG_X86_MPPARSE) 1600 /* mptable code is not built-in*/ 1601 if (acpi_disabled || acpi_noirq) { 1602 printk(KERN_WARNING "MPS support code is not built-in.\n" 1603 "Using acpi=off or acpi=noirq or pci=noacpi " 1604 "may have problem\n"); 1605 return 1; 1606 } 1607 #endif 1608 return 0; 1609 } 1610 1611 #ifdef CONFIG_X86_IO_APIC 1612 static int __init parse_acpi_skip_timer_override(char *arg) 1613 { 1614 acpi_skip_timer_override = 1; 1615 return 0; 1616 } 1617 early_param("acpi_skip_timer_override", parse_acpi_skip_timer_override); 1618 1619 static int __init parse_acpi_use_timer_override(char *arg) 1620 { 1621 acpi_use_timer_override = 1; 1622 return 0; 1623 } 1624 early_param("acpi_use_timer_override", parse_acpi_use_timer_override); 1625 #endif /* CONFIG_X86_IO_APIC */ 1626 1627 static int __init setup_acpi_sci(char *s) 1628 { 1629 if (!s) 1630 return -EINVAL; 1631 if (!strcmp(s, "edge")) 1632 acpi_sci_flags = ACPI_MADT_TRIGGER_EDGE | 1633 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK); 1634 else if (!strcmp(s, "level")) 1635 acpi_sci_flags = ACPI_MADT_TRIGGER_LEVEL | 1636 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK); 1637 else if (!strcmp(s, "high")) 1638 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_HIGH | 1639 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK); 1640 else if (!strcmp(s, "low")) 1641 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_LOW | 1642 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK); 1643 else 1644 return -EINVAL; 1645 return 0; 1646 } 1647 early_param("acpi_sci", setup_acpi_sci); 1648 1649 int __acpi_acquire_global_lock(unsigned int *lock) 1650 { 1651 unsigned int old, new, val; 1652 do { 1653 old = *lock; 1654 new = (((old & ~0x3) + 2) + ((old >> 1) & 0x1)); 1655 val = cmpxchg(lock, old, new); 1656 } while (unlikely (val != old)); 1657 return (new < 3) ? -1 : 0; 1658 } 1659 1660 int __acpi_release_global_lock(unsigned int *lock) 1661 { 1662 unsigned int old, new, val; 1663 do { 1664 old = *lock; 1665 new = old & ~0x3; 1666 val = cmpxchg(lock, old, new); 1667 } while (unlikely (val != old)); 1668 return old & 0x1; 1669 } 1670 1671 void __init arch_reserve_mem_area(acpi_physical_address addr, size_t size) 1672 { 1673 e820_add_region(addr, size, E820_ACPI); 1674 update_e820(); 1675 } 1676