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/irqdomain.h> 40 #include <asm/pci_x86.h> 41 #include <asm/pgtable.h> 42 #include <asm/io_apic.h> 43 #include <asm/apic.h> 44 #include <asm/io.h> 45 #include <asm/mpspec.h> 46 #include <asm/smp.h> 47 #include <asm/i8259.h> 48 49 #include "sleep.h" /* To include x86_acpi_suspend_lowlevel */ 50 static int __initdata acpi_force = 0; 51 int acpi_disabled; 52 EXPORT_SYMBOL(acpi_disabled); 53 54 #ifdef CONFIG_X86_64 55 # include <asm/proto.h> 56 #endif /* X86 */ 57 58 #define PREFIX "ACPI: " 59 60 int acpi_noirq; /* skip ACPI IRQ initialization */ 61 int acpi_pci_disabled; /* skip ACPI PCI scan and IRQ initialization */ 62 EXPORT_SYMBOL(acpi_pci_disabled); 63 64 int acpi_lapic; 65 int acpi_ioapic; 66 int acpi_strict; 67 int acpi_disable_cmcff; 68 69 u8 acpi_sci_flags __initdata; 70 int acpi_sci_override_gsi __initdata; 71 int acpi_skip_timer_override __initdata; 72 int acpi_use_timer_override __initdata; 73 int acpi_fix_pin2_polarity __initdata; 74 75 #ifdef CONFIG_X86_LOCAL_APIC 76 static u64 acpi_lapic_addr __initdata = APIC_DEFAULT_PHYS_BASE; 77 #endif 78 79 /* 80 * 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 */ 90 static 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 */ 100 enum 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 */ 107 static 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 */ 117 char *__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 } 125 126 void __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 135 static 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 */ 168 static 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 } 187 188 static int __init 189 acpi_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 } 222 223 static int __init 224 acpi_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 } 247 248 static int __init 249 acpi_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 } 265 266 static int __init 267 acpi_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 } 281 282 static int __init 283 acpi_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 } 300 301 static int __init 302 acpi_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 0 323 324 static 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 } 366 367 static 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 } 402 403 static int __init 404 acpi_parse_ioapic(struct acpi_subtable_header * header, const unsigned long end) 405 { 406 struct acpi_madt_io_apic *ioapic = NULL; 407 struct ioapic_domain_cfg cfg = { 408 .type = IOAPIC_DOMAIN_DYNAMIC, 409 .ops = &mp_ioapic_irqdomain_ops, 410 }; 411 412 ioapic = (struct acpi_madt_io_apic *)header; 413 414 if (BAD_MADT_ENTRY(ioapic, end)) 415 return -EINVAL; 416 417 acpi_table_print_madt_entry(header); 418 419 /* Statically assign IRQ numbers for IOAPICs hosting legacy IRQs */ 420 if (ioapic->global_irq_base < nr_legacy_irqs()) 421 cfg.type = IOAPIC_DOMAIN_LEGACY; 422 423 mp_register_ioapic(ioapic->id, ioapic->address, ioapic->global_irq_base, 424 &cfg); 425 426 return 0; 427 } 428 429 /* 430 * Parse Interrupt Source Override for the ACPI SCI 431 */ 432 static void __init acpi_sci_ioapic_setup(u8 bus_irq, u16 polarity, u16 trigger, u32 gsi) 433 { 434 if (trigger == 0) /* compatible SCI trigger is level */ 435 trigger = 3; 436 437 if (polarity == 0) /* compatible SCI polarity is low */ 438 polarity = 3; 439 440 /* Command-line over-ride via acpi_sci= */ 441 if (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) 442 trigger = (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2; 443 444 if (acpi_sci_flags & ACPI_MADT_POLARITY_MASK) 445 polarity = acpi_sci_flags & ACPI_MADT_POLARITY_MASK; 446 447 mp_override_legacy_irq(bus_irq, polarity, trigger, gsi); 448 acpi_penalize_sci_irq(bus_irq, trigger, polarity); 449 450 /* 451 * stash over-ride to indicate we've been here 452 * and for later update of acpi_gbl_FADT 453 */ 454 acpi_sci_override_gsi = gsi; 455 return; 456 } 457 458 static int __init 459 acpi_parse_int_src_ovr(struct acpi_subtable_header * header, 460 const unsigned long end) 461 { 462 struct acpi_madt_interrupt_override *intsrc = NULL; 463 464 intsrc = (struct acpi_madt_interrupt_override *)header; 465 466 if (BAD_MADT_ENTRY(intsrc, end)) 467 return -EINVAL; 468 469 acpi_table_print_madt_entry(header); 470 471 if (intsrc->source_irq == acpi_gbl_FADT.sci_interrupt) { 472 acpi_sci_ioapic_setup(intsrc->source_irq, 473 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK, 474 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2, 475 intsrc->global_irq); 476 return 0; 477 } 478 479 if (intsrc->source_irq == 0) { 480 if (acpi_skip_timer_override) { 481 printk(PREFIX "BIOS IRQ0 override ignored.\n"); 482 return 0; 483 } 484 485 if ((intsrc->global_irq == 2) && acpi_fix_pin2_polarity 486 && (intsrc->inti_flags & ACPI_MADT_POLARITY_MASK)) { 487 intsrc->inti_flags &= ~ACPI_MADT_POLARITY_MASK; 488 printk(PREFIX "BIOS IRQ0 pin2 override: forcing polarity to high active.\n"); 489 } 490 } 491 492 mp_override_legacy_irq(intsrc->source_irq, 493 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK, 494 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2, 495 intsrc->global_irq); 496 497 return 0; 498 } 499 500 static int __init 501 acpi_parse_nmi_src(struct acpi_subtable_header * header, const unsigned long end) 502 { 503 struct acpi_madt_nmi_source *nmi_src = NULL; 504 505 nmi_src = (struct acpi_madt_nmi_source *)header; 506 507 if (BAD_MADT_ENTRY(nmi_src, end)) 508 return -EINVAL; 509 510 acpi_table_print_madt_entry(header); 511 512 /* TBD: Support nimsrc entries? */ 513 514 return 0; 515 } 516 517 #endif /* CONFIG_X86_IO_APIC */ 518 519 /* 520 * acpi_pic_sci_set_trigger() 521 * 522 * use ELCR to set PIC-mode trigger type for SCI 523 * 524 * If a PIC-mode SCI is not recognized or gives spurious IRQ7's 525 * it may require Edge Trigger -- use "acpi_sci=edge" 526 * 527 * Port 0x4d0-4d1 are ECLR1 and ECLR2, the Edge/Level Control Registers 528 * for the 8259 PIC. bit[n] = 1 means irq[n] is Level, otherwise Edge. 529 * ECLR1 is IRQs 0-7 (IRQ 0, 1, 2 must be 0) 530 * ECLR2 is IRQs 8-15 (IRQ 8, 13 must be 0) 531 */ 532 533 void __init acpi_pic_sci_set_trigger(unsigned int irq, u16 trigger) 534 { 535 unsigned int mask = 1 << irq; 536 unsigned int old, new; 537 538 /* Real old ELCR mask */ 539 old = inb(0x4d0) | (inb(0x4d1) << 8); 540 541 /* 542 * If we use ACPI to set PCI IRQs, then we should clear ELCR 543 * since we will set it correctly as we enable the PCI irq 544 * routing. 545 */ 546 new = acpi_noirq ? old : 0; 547 548 /* 549 * Update SCI information in the ELCR, it isn't in the PCI 550 * routing tables.. 551 */ 552 switch (trigger) { 553 case 1: /* Edge - clear */ 554 new &= ~mask; 555 break; 556 case 3: /* Level - set */ 557 new |= mask; 558 break; 559 } 560 561 if (old == new) 562 return; 563 564 printk(PREFIX "setting ELCR to %04x (from %04x)\n", new, old); 565 outb(new, 0x4d0); 566 outb(new >> 8, 0x4d1); 567 } 568 569 int acpi_gsi_to_irq(u32 gsi, unsigned int *irqp) 570 { 571 int rc, irq, trigger, polarity; 572 573 if (acpi_irq_model == ACPI_IRQ_MODEL_PIC) { 574 *irqp = gsi; 575 return 0; 576 } 577 578 rc = acpi_get_override_irq(gsi, &trigger, &polarity); 579 if (rc == 0) { 580 trigger = trigger ? ACPI_LEVEL_SENSITIVE : ACPI_EDGE_SENSITIVE; 581 polarity = polarity ? ACPI_ACTIVE_LOW : ACPI_ACTIVE_HIGH; 582 irq = acpi_register_gsi(NULL, gsi, trigger, polarity); 583 if (irq >= 0) { 584 *irqp = irq; 585 return 0; 586 } 587 } 588 589 return -1; 590 } 591 EXPORT_SYMBOL_GPL(acpi_gsi_to_irq); 592 593 int acpi_isa_irq_to_gsi(unsigned isa_irq, u32 *gsi) 594 { 595 if (isa_irq < nr_legacy_irqs() && 596 isa_irq_to_gsi[isa_irq] != ACPI_INVALID_GSI) { 597 *gsi = isa_irq_to_gsi[isa_irq]; 598 return 0; 599 } 600 601 return -1; 602 } 603 604 static int acpi_register_gsi_pic(struct device *dev, u32 gsi, 605 int trigger, int polarity) 606 { 607 #ifdef CONFIG_PCI 608 /* 609 * Make sure all (legacy) PCI IRQs are set as level-triggered. 610 */ 611 if (trigger == ACPI_LEVEL_SENSITIVE) 612 elcr_set_level_irq(gsi); 613 #endif 614 615 return gsi; 616 } 617 618 #ifdef CONFIG_X86_LOCAL_APIC 619 static int acpi_register_gsi_ioapic(struct device *dev, u32 gsi, 620 int trigger, int polarity) 621 { 622 int irq = gsi; 623 #ifdef CONFIG_X86_IO_APIC 624 int node; 625 struct irq_alloc_info info; 626 627 node = dev ? dev_to_node(dev) : NUMA_NO_NODE; 628 trigger = trigger == ACPI_EDGE_SENSITIVE ? 0 : 1; 629 polarity = polarity == ACPI_ACTIVE_HIGH ? 0 : 1; 630 ioapic_set_alloc_attr(&info, node, trigger, polarity); 631 632 mutex_lock(&acpi_ioapic_lock); 633 irq = mp_map_gsi_to_irq(gsi, IOAPIC_MAP_ALLOC, &info); 634 /* Don't set up the ACPI SCI because it's already set up */ 635 if (irq >= 0 && enable_update_mptable && 636 acpi_gbl_FADT.sci_interrupt != gsi) 637 mp_config_acpi_gsi(dev, gsi, trigger, polarity); 638 mutex_unlock(&acpi_ioapic_lock); 639 #endif 640 641 return irq; 642 } 643 644 static void acpi_unregister_gsi_ioapic(u32 gsi) 645 { 646 #ifdef CONFIG_X86_IO_APIC 647 int irq; 648 649 mutex_lock(&acpi_ioapic_lock); 650 irq = mp_map_gsi_to_irq(gsi, 0, NULL); 651 if (irq > 0) 652 mp_unmap_irq(irq); 653 mutex_unlock(&acpi_ioapic_lock); 654 #endif 655 } 656 #endif 657 658 int (*__acpi_register_gsi)(struct device *dev, u32 gsi, 659 int trigger, int polarity) = acpi_register_gsi_pic; 660 void (*__acpi_unregister_gsi)(u32 gsi) = NULL; 661 662 #ifdef CONFIG_ACPI_SLEEP 663 int (*acpi_suspend_lowlevel)(void) = x86_acpi_suspend_lowlevel; 664 #else 665 int (*acpi_suspend_lowlevel)(void); 666 #endif 667 668 /* 669 * success: return IRQ number (>=0) 670 * failure: return < 0 671 */ 672 int acpi_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity) 673 { 674 return __acpi_register_gsi(dev, gsi, trigger, polarity); 675 } 676 EXPORT_SYMBOL_GPL(acpi_register_gsi); 677 678 void acpi_unregister_gsi(u32 gsi) 679 { 680 if (__acpi_unregister_gsi) 681 __acpi_unregister_gsi(gsi); 682 } 683 EXPORT_SYMBOL_GPL(acpi_unregister_gsi); 684 685 #ifdef CONFIG_X86_LOCAL_APIC 686 static void __init acpi_set_irq_model_ioapic(void) 687 { 688 acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC; 689 __acpi_register_gsi = acpi_register_gsi_ioapic; 690 __acpi_unregister_gsi = acpi_unregister_gsi_ioapic; 691 acpi_ioapic = 1; 692 } 693 #endif 694 695 /* 696 * ACPI based hotplug support for CPU 697 */ 698 #ifdef CONFIG_ACPI_HOTPLUG_CPU 699 #include <acpi/processor.h> 700 701 static void acpi_map_cpu2node(acpi_handle handle, int cpu, int physid) 702 { 703 #ifdef CONFIG_ACPI_NUMA 704 int nid; 705 706 nid = acpi_get_node(handle); 707 if (nid != -1) { 708 set_apicid_to_node(physid, nid); 709 numa_set_node(cpu, nid); 710 } 711 #endif 712 } 713 714 int acpi_map_cpu(acpi_handle handle, phys_cpuid_t physid, int *pcpu) 715 { 716 int cpu; 717 718 cpu = acpi_register_lapic(physid, ACPI_MADT_ENABLED); 719 if (cpu < 0) { 720 pr_info(PREFIX "Unable to map lapic to logical cpu number\n"); 721 return cpu; 722 } 723 724 acpi_processor_set_pdc(handle); 725 acpi_map_cpu2node(handle, cpu, physid); 726 727 *pcpu = cpu; 728 return 0; 729 } 730 EXPORT_SYMBOL(acpi_map_cpu); 731 732 int acpi_unmap_cpu(int cpu) 733 { 734 #ifdef CONFIG_ACPI_NUMA 735 set_apicid_to_node(per_cpu(x86_cpu_to_apicid, cpu), NUMA_NO_NODE); 736 #endif 737 738 per_cpu(x86_cpu_to_apicid, cpu) = -1; 739 set_cpu_present(cpu, false); 740 num_processors--; 741 742 return (0); 743 } 744 EXPORT_SYMBOL(acpi_unmap_cpu); 745 #endif /* CONFIG_ACPI_HOTPLUG_CPU */ 746 747 int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base) 748 { 749 int ret = -ENOSYS; 750 #ifdef CONFIG_ACPI_HOTPLUG_IOAPIC 751 int ioapic_id; 752 u64 addr; 753 struct ioapic_domain_cfg cfg = { 754 .type = IOAPIC_DOMAIN_DYNAMIC, 755 .ops = &mp_ioapic_irqdomain_ops, 756 }; 757 758 ioapic_id = acpi_get_ioapic_id(handle, gsi_base, &addr); 759 if (ioapic_id < 0) { 760 unsigned long long uid; 761 acpi_status status; 762 763 status = acpi_evaluate_integer(handle, METHOD_NAME__UID, 764 NULL, &uid); 765 if (ACPI_FAILURE(status)) { 766 acpi_handle_warn(handle, "failed to get IOAPIC ID.\n"); 767 return -EINVAL; 768 } 769 ioapic_id = (int)uid; 770 } 771 772 mutex_lock(&acpi_ioapic_lock); 773 ret = mp_register_ioapic(ioapic_id, phys_addr, gsi_base, &cfg); 774 mutex_unlock(&acpi_ioapic_lock); 775 #endif 776 777 return ret; 778 } 779 EXPORT_SYMBOL(acpi_register_ioapic); 780 781 int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base) 782 { 783 int ret = -ENOSYS; 784 785 #ifdef CONFIG_ACPI_HOTPLUG_IOAPIC 786 mutex_lock(&acpi_ioapic_lock); 787 ret = mp_unregister_ioapic(gsi_base); 788 mutex_unlock(&acpi_ioapic_lock); 789 #endif 790 791 return ret; 792 } 793 EXPORT_SYMBOL(acpi_unregister_ioapic); 794 795 /** 796 * acpi_ioapic_registered - Check whether IOAPIC assoicatied with @gsi_base 797 * has been registered 798 * @handle: ACPI handle of the IOAPIC deivce 799 * @gsi_base: GSI base associated with the IOAPIC 800 * 801 * Assume caller holds some type of lock to serialize acpi_ioapic_registered() 802 * with acpi_register_ioapic()/acpi_unregister_ioapic(). 803 */ 804 int acpi_ioapic_registered(acpi_handle handle, u32 gsi_base) 805 { 806 int ret = 0; 807 808 #ifdef CONFIG_ACPI_HOTPLUG_IOAPIC 809 mutex_lock(&acpi_ioapic_lock); 810 ret = mp_ioapic_registered(gsi_base); 811 mutex_unlock(&acpi_ioapic_lock); 812 #endif 813 814 return ret; 815 } 816 817 static int __init acpi_parse_sbf(struct acpi_table_header *table) 818 { 819 struct acpi_table_boot *sb = (struct acpi_table_boot *)table; 820 821 sbf_port = sb->cmos_index; /* Save CMOS port */ 822 823 return 0; 824 } 825 826 #ifdef CONFIG_HPET_TIMER 827 #include <asm/hpet.h> 828 829 static struct resource *hpet_res __initdata; 830 831 static int __init acpi_parse_hpet(struct acpi_table_header *table) 832 { 833 struct acpi_table_hpet *hpet_tbl = (struct acpi_table_hpet *)table; 834 835 if (hpet_tbl->address.space_id != ACPI_SPACE_MEM) { 836 printk(KERN_WARNING PREFIX "HPET timers must be located in " 837 "memory.\n"); 838 return -1; 839 } 840 841 hpet_address = hpet_tbl->address.address; 842 hpet_blockid = hpet_tbl->sequence; 843 844 /* 845 * Some broken BIOSes advertise HPET at 0x0. We really do not 846 * want to allocate a resource there. 847 */ 848 if (!hpet_address) { 849 printk(KERN_WARNING PREFIX 850 "HPET id: %#x base: %#lx is invalid\n", 851 hpet_tbl->id, hpet_address); 852 return 0; 853 } 854 #ifdef CONFIG_X86_64 855 /* 856 * Some even more broken BIOSes advertise HPET at 857 * 0xfed0000000000000 instead of 0xfed00000. Fix it up and add 858 * some noise: 859 */ 860 if (hpet_address == 0xfed0000000000000UL) { 861 if (!hpet_force_user) { 862 printk(KERN_WARNING PREFIX "HPET id: %#x " 863 "base: 0xfed0000000000000 is bogus\n " 864 "try hpet=force on the kernel command line to " 865 "fix it up to 0xfed00000.\n", hpet_tbl->id); 866 hpet_address = 0; 867 return 0; 868 } 869 printk(KERN_WARNING PREFIX 870 "HPET id: %#x base: 0xfed0000000000000 fixed up " 871 "to 0xfed00000.\n", hpet_tbl->id); 872 hpet_address >>= 32; 873 } 874 #endif 875 printk(KERN_INFO PREFIX "HPET id: %#x base: %#lx\n", 876 hpet_tbl->id, hpet_address); 877 878 /* 879 * Allocate and initialize the HPET firmware resource for adding into 880 * the resource tree during the lateinit timeframe. 881 */ 882 #define HPET_RESOURCE_NAME_SIZE 9 883 hpet_res = alloc_bootmem(sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE); 884 885 hpet_res->name = (void *)&hpet_res[1]; 886 hpet_res->flags = IORESOURCE_MEM; 887 snprintf((char *)hpet_res->name, HPET_RESOURCE_NAME_SIZE, "HPET %u", 888 hpet_tbl->sequence); 889 890 hpet_res->start = hpet_address; 891 hpet_res->end = hpet_address + (1 * 1024) - 1; 892 893 return 0; 894 } 895 896 /* 897 * hpet_insert_resource inserts the HPET resources used into the resource 898 * tree. 899 */ 900 static __init int hpet_insert_resource(void) 901 { 902 if (!hpet_res) 903 return 1; 904 905 return insert_resource(&iomem_resource, hpet_res); 906 } 907 908 late_initcall(hpet_insert_resource); 909 910 #else 911 #define acpi_parse_hpet NULL 912 #endif 913 914 static int __init acpi_parse_fadt(struct acpi_table_header *table) 915 { 916 917 #ifdef CONFIG_X86_PM_TIMER 918 /* detect the location of the ACPI PM Timer */ 919 if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID) { 920 /* FADT rev. 2 */ 921 if (acpi_gbl_FADT.xpm_timer_block.space_id != 922 ACPI_ADR_SPACE_SYSTEM_IO) 923 return 0; 924 925 pmtmr_ioport = acpi_gbl_FADT.xpm_timer_block.address; 926 /* 927 * "X" fields are optional extensions to the original V1.0 928 * fields, so we must selectively expand V1.0 fields if the 929 * corresponding X field is zero. 930 */ 931 if (!pmtmr_ioport) 932 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block; 933 } else { 934 /* FADT rev. 1 */ 935 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block; 936 } 937 if (pmtmr_ioport) 938 printk(KERN_INFO PREFIX "PM-Timer IO Port: %#x\n", 939 pmtmr_ioport); 940 #endif 941 return 0; 942 } 943 944 #ifdef CONFIG_X86_LOCAL_APIC 945 /* 946 * Parse LAPIC entries in MADT 947 * returns 0 on success, < 0 on error 948 */ 949 950 static int __init early_acpi_parse_madt_lapic_addr_ovr(void) 951 { 952 int count; 953 954 if (!cpu_has_apic) 955 return -ENODEV; 956 957 /* 958 * Note that the LAPIC address is obtained from the MADT (32-bit value) 959 * and (optionally) overridden by a LAPIC_ADDR_OVR entry (64-bit value). 960 */ 961 962 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE, 963 acpi_parse_lapic_addr_ovr, 0); 964 if (count < 0) { 965 printk(KERN_ERR PREFIX 966 "Error parsing LAPIC address override entry\n"); 967 return count; 968 } 969 970 register_lapic_address(acpi_lapic_addr); 971 972 return count; 973 } 974 975 static int __init acpi_parse_madt_lapic_entries(void) 976 { 977 int count; 978 int x2count = 0; 979 int ret; 980 struct acpi_subtable_proc madt_proc[2]; 981 982 if (!cpu_has_apic) 983 return -ENODEV; 984 985 /* 986 * Note that the LAPIC address is obtained from the MADT (32-bit value) 987 * and (optionally) overridden by a LAPIC_ADDR_OVR entry (64-bit value). 988 */ 989 990 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE, 991 acpi_parse_lapic_addr_ovr, 0); 992 if (count < 0) { 993 printk(KERN_ERR PREFIX 994 "Error parsing LAPIC address override entry\n"); 995 return count; 996 } 997 998 register_lapic_address(acpi_lapic_addr); 999 1000 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC, 1001 acpi_parse_sapic, MAX_LOCAL_APIC); 1002 1003 if (!count) { 1004 memset(madt_proc, 0, sizeof(madt_proc)); 1005 madt_proc[0].id = ACPI_MADT_TYPE_LOCAL_APIC; 1006 madt_proc[0].handler = acpi_parse_lapic; 1007 madt_proc[1].id = ACPI_MADT_TYPE_LOCAL_X2APIC; 1008 madt_proc[1].handler = acpi_parse_x2apic; 1009 ret = acpi_table_parse_entries_array(ACPI_SIG_MADT, 1010 sizeof(struct acpi_table_madt), 1011 madt_proc, ARRAY_SIZE(madt_proc), MAX_LOCAL_APIC); 1012 if (ret < 0) { 1013 printk(KERN_ERR PREFIX 1014 "Error parsing LAPIC/X2APIC entries\n"); 1015 return ret; 1016 } 1017 1018 x2count = madt_proc[0].count; 1019 count = madt_proc[1].count; 1020 } 1021 if (!count && !x2count) { 1022 printk(KERN_ERR PREFIX "No LAPIC entries present\n"); 1023 /* TBD: Cleanup to allow fallback to MPS */ 1024 return -ENODEV; 1025 } else if (count < 0 || x2count < 0) { 1026 printk(KERN_ERR PREFIX "Error parsing LAPIC entry\n"); 1027 /* TBD: Cleanup to allow fallback to MPS */ 1028 return count; 1029 } 1030 1031 x2count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC_NMI, 1032 acpi_parse_x2apic_nmi, 0); 1033 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI, 1034 acpi_parse_lapic_nmi, 0); 1035 if (count < 0 || x2count < 0) { 1036 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n"); 1037 /* TBD: Cleanup to allow fallback to MPS */ 1038 return count; 1039 } 1040 return 0; 1041 } 1042 #endif /* CONFIG_X86_LOCAL_APIC */ 1043 1044 #ifdef CONFIG_X86_IO_APIC 1045 static void __init mp_config_acpi_legacy_irqs(void) 1046 { 1047 int i; 1048 struct mpc_intsrc mp_irq; 1049 1050 #ifdef CONFIG_EISA 1051 /* 1052 * Fabricate the legacy ISA bus (bus #31). 1053 */ 1054 mp_bus_id_to_type[MP_ISA_BUS] = MP_BUS_ISA; 1055 #endif 1056 set_bit(MP_ISA_BUS, mp_bus_not_pci); 1057 pr_debug("Bus #%d is ISA\n", MP_ISA_BUS); 1058 1059 /* 1060 * Use the default configuration for the IRQs 0-15. Unless 1061 * overridden by (MADT) interrupt source override entries. 1062 */ 1063 for (i = 0; i < nr_legacy_irqs(); i++) { 1064 int ioapic, pin; 1065 unsigned int dstapic; 1066 int idx; 1067 u32 gsi; 1068 1069 /* Locate the gsi that irq i maps to. */ 1070 if (acpi_isa_irq_to_gsi(i, &gsi)) 1071 continue; 1072 1073 /* 1074 * Locate the IOAPIC that manages the ISA IRQ. 1075 */ 1076 ioapic = mp_find_ioapic(gsi); 1077 if (ioapic < 0) 1078 continue; 1079 pin = mp_find_ioapic_pin(ioapic, gsi); 1080 dstapic = mpc_ioapic_id(ioapic); 1081 1082 for (idx = 0; idx < mp_irq_entries; idx++) { 1083 struct mpc_intsrc *irq = mp_irqs + idx; 1084 1085 /* Do we already have a mapping for this ISA IRQ? */ 1086 if (irq->srcbus == MP_ISA_BUS && irq->srcbusirq == i) 1087 break; 1088 1089 /* Do we already have a mapping for this IOAPIC pin */ 1090 if (irq->dstapic == dstapic && irq->dstirq == pin) 1091 break; 1092 } 1093 1094 if (idx != mp_irq_entries) { 1095 printk(KERN_DEBUG "ACPI: IRQ%d used by override.\n", i); 1096 continue; /* IRQ already used */ 1097 } 1098 1099 mp_irq.type = MP_INTSRC; 1100 mp_irq.irqflag = 0; /* Conforming */ 1101 mp_irq.srcbus = MP_ISA_BUS; 1102 mp_irq.dstapic = dstapic; 1103 mp_irq.irqtype = mp_INT; 1104 mp_irq.srcbusirq = i; /* Identity mapped */ 1105 mp_irq.dstirq = pin; 1106 1107 mp_save_irq(&mp_irq); 1108 } 1109 } 1110 1111 /* 1112 * Parse IOAPIC related entries in MADT 1113 * returns 0 on success, < 0 on error 1114 */ 1115 static int __init acpi_parse_madt_ioapic_entries(void) 1116 { 1117 int count; 1118 1119 /* 1120 * ACPI interpreter is required to complete interrupt setup, 1121 * so if it is off, don't enumerate the io-apics with ACPI. 1122 * If MPS is present, it will handle them, 1123 * otherwise the system will stay in PIC mode 1124 */ 1125 if (acpi_disabled || acpi_noirq) 1126 return -ENODEV; 1127 1128 if (!cpu_has_apic) 1129 return -ENODEV; 1130 1131 /* 1132 * if "noapic" boot option, don't look for IO-APICs 1133 */ 1134 if (skip_ioapic_setup) { 1135 printk(KERN_INFO PREFIX "Skipping IOAPIC probe " 1136 "due to 'noapic' option.\n"); 1137 return -ENODEV; 1138 } 1139 1140 count = acpi_table_parse_madt(ACPI_MADT_TYPE_IO_APIC, acpi_parse_ioapic, 1141 MAX_IO_APICS); 1142 if (!count) { 1143 printk(KERN_ERR PREFIX "No IOAPIC entries present\n"); 1144 return -ENODEV; 1145 } else if (count < 0) { 1146 printk(KERN_ERR PREFIX "Error parsing IOAPIC entry\n"); 1147 return count; 1148 } 1149 1150 count = acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE, 1151 acpi_parse_int_src_ovr, nr_irqs); 1152 if (count < 0) { 1153 printk(KERN_ERR PREFIX 1154 "Error parsing interrupt source overrides entry\n"); 1155 /* TBD: Cleanup to allow fallback to MPS */ 1156 return count; 1157 } 1158 1159 /* 1160 * If BIOS did not supply an INT_SRC_OVR for the SCI 1161 * pretend we got one so we can set the SCI flags. 1162 */ 1163 if (!acpi_sci_override_gsi) 1164 acpi_sci_ioapic_setup(acpi_gbl_FADT.sci_interrupt, 0, 0, 1165 acpi_gbl_FADT.sci_interrupt); 1166 1167 /* Fill in identity legacy mappings where no override */ 1168 mp_config_acpi_legacy_irqs(); 1169 1170 count = acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE, 1171 acpi_parse_nmi_src, nr_irqs); 1172 if (count < 0) { 1173 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n"); 1174 /* TBD: Cleanup to allow fallback to MPS */ 1175 return count; 1176 } 1177 1178 return 0; 1179 } 1180 #else 1181 static inline int acpi_parse_madt_ioapic_entries(void) 1182 { 1183 return -1; 1184 } 1185 #endif /* !CONFIG_X86_IO_APIC */ 1186 1187 static void __init early_acpi_process_madt(void) 1188 { 1189 #ifdef CONFIG_X86_LOCAL_APIC 1190 int error; 1191 1192 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) { 1193 1194 /* 1195 * Parse MADT LAPIC entries 1196 */ 1197 error = early_acpi_parse_madt_lapic_addr_ovr(); 1198 if (!error) { 1199 acpi_lapic = 1; 1200 smp_found_config = 1; 1201 } 1202 if (error == -EINVAL) { 1203 /* 1204 * Dell Precision Workstation 410, 610 come here. 1205 */ 1206 printk(KERN_ERR PREFIX 1207 "Invalid BIOS MADT, disabling ACPI\n"); 1208 disable_acpi(); 1209 } 1210 } 1211 #endif 1212 } 1213 1214 static void __init acpi_process_madt(void) 1215 { 1216 #ifdef CONFIG_X86_LOCAL_APIC 1217 int error; 1218 1219 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) { 1220 1221 /* 1222 * Parse MADT LAPIC entries 1223 */ 1224 error = acpi_parse_madt_lapic_entries(); 1225 if (!error) { 1226 acpi_lapic = 1; 1227 1228 /* 1229 * Parse MADT IO-APIC entries 1230 */ 1231 mutex_lock(&acpi_ioapic_lock); 1232 error = acpi_parse_madt_ioapic_entries(); 1233 mutex_unlock(&acpi_ioapic_lock); 1234 if (!error) { 1235 acpi_set_irq_model_ioapic(); 1236 1237 smp_found_config = 1; 1238 } 1239 } 1240 if (error == -EINVAL) { 1241 /* 1242 * Dell Precision Workstation 410, 610 come here. 1243 */ 1244 printk(KERN_ERR PREFIX 1245 "Invalid BIOS MADT, disabling ACPI\n"); 1246 disable_acpi(); 1247 } 1248 } else { 1249 /* 1250 * ACPI found no MADT, and so ACPI wants UP PIC mode. 1251 * In the event an MPS table was found, forget it. 1252 * Boot with "acpi=off" to use MPS on such a system. 1253 */ 1254 if (smp_found_config) { 1255 printk(KERN_WARNING PREFIX 1256 "No APIC-table, disabling MPS\n"); 1257 smp_found_config = 0; 1258 } 1259 } 1260 1261 /* 1262 * ACPI supports both logical (e.g. Hyper-Threading) and physical 1263 * processors, where MPS only supports physical. 1264 */ 1265 if (acpi_lapic && acpi_ioapic) 1266 printk(KERN_INFO "Using ACPI (MADT) for SMP configuration " 1267 "information\n"); 1268 else if (acpi_lapic) 1269 printk(KERN_INFO "Using ACPI for processor (LAPIC) " 1270 "configuration information\n"); 1271 #endif 1272 return; 1273 } 1274 1275 static int __init disable_acpi_irq(const struct dmi_system_id *d) 1276 { 1277 if (!acpi_force) { 1278 printk(KERN_NOTICE "%s detected: force use of acpi=noirq\n", 1279 d->ident); 1280 acpi_noirq_set(); 1281 } 1282 return 0; 1283 } 1284 1285 static int __init disable_acpi_pci(const struct dmi_system_id *d) 1286 { 1287 if (!acpi_force) { 1288 printk(KERN_NOTICE "%s detected: force use of pci=noacpi\n", 1289 d->ident); 1290 acpi_disable_pci(); 1291 } 1292 return 0; 1293 } 1294 1295 static int __init dmi_disable_acpi(const struct dmi_system_id *d) 1296 { 1297 if (!acpi_force) { 1298 printk(KERN_NOTICE "%s detected: acpi off\n", d->ident); 1299 disable_acpi(); 1300 } else { 1301 printk(KERN_NOTICE 1302 "Warning: DMI blacklist says broken, but acpi forced\n"); 1303 } 1304 return 0; 1305 } 1306 1307 /* 1308 * Force ignoring BIOS IRQ0 override 1309 */ 1310 static int __init dmi_ignore_irq0_timer_override(const struct dmi_system_id *d) 1311 { 1312 if (!acpi_skip_timer_override) { 1313 pr_notice("%s detected: Ignoring BIOS IRQ0 override\n", 1314 d->ident); 1315 acpi_skip_timer_override = 1; 1316 } 1317 return 0; 1318 } 1319 1320 /* 1321 * ACPI offers an alternative platform interface model that removes 1322 * ACPI hardware requirements for platforms that do not implement 1323 * the PC Architecture. 1324 * 1325 * We initialize the Hardware-reduced ACPI model here: 1326 */ 1327 static void __init acpi_reduced_hw_init(void) 1328 { 1329 if (acpi_gbl_reduced_hardware) { 1330 /* 1331 * Override x86_init functions and bypass legacy pic 1332 * in Hardware-reduced ACPI mode 1333 */ 1334 x86_init.timers.timer_init = x86_init_noop; 1335 x86_init.irqs.pre_vector_init = x86_init_noop; 1336 legacy_pic = &null_legacy_pic; 1337 } 1338 } 1339 1340 /* 1341 * If your system is blacklisted here, but you find that acpi=force 1342 * works for you, please contact linux-acpi@vger.kernel.org 1343 */ 1344 static struct dmi_system_id __initdata acpi_dmi_table[] = { 1345 /* 1346 * Boxes that need ACPI disabled 1347 */ 1348 { 1349 .callback = dmi_disable_acpi, 1350 .ident = "IBM Thinkpad", 1351 .matches = { 1352 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), 1353 DMI_MATCH(DMI_BOARD_NAME, "2629H1G"), 1354 }, 1355 }, 1356 1357 /* 1358 * Boxes that need ACPI PCI IRQ routing disabled 1359 */ 1360 { 1361 .callback = disable_acpi_irq, 1362 .ident = "ASUS A7V", 1363 .matches = { 1364 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC"), 1365 DMI_MATCH(DMI_BOARD_NAME, "<A7V>"), 1366 /* newer BIOS, Revision 1011, does work */ 1367 DMI_MATCH(DMI_BIOS_VERSION, 1368 "ASUS A7V ACPI BIOS Revision 1007"), 1369 }, 1370 }, 1371 { 1372 /* 1373 * Latest BIOS for IBM 600E (1.16) has bad pcinum 1374 * for LPC bridge, which is needed for the PCI 1375 * interrupt links to work. DSDT fix is in bug 5966. 1376 * 2645, 2646 model numbers are shared with 600/600E/600X 1377 */ 1378 .callback = disable_acpi_irq, 1379 .ident = "IBM Thinkpad 600 Series 2645", 1380 .matches = { 1381 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), 1382 DMI_MATCH(DMI_BOARD_NAME, "2645"), 1383 }, 1384 }, 1385 { 1386 .callback = disable_acpi_irq, 1387 .ident = "IBM Thinkpad 600 Series 2646", 1388 .matches = { 1389 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), 1390 DMI_MATCH(DMI_BOARD_NAME, "2646"), 1391 }, 1392 }, 1393 /* 1394 * Boxes that need ACPI PCI IRQ routing and PCI scan disabled 1395 */ 1396 { /* _BBN 0 bug */ 1397 .callback = disable_acpi_pci, 1398 .ident = "ASUS PR-DLS", 1399 .matches = { 1400 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."), 1401 DMI_MATCH(DMI_BOARD_NAME, "PR-DLS"), 1402 DMI_MATCH(DMI_BIOS_VERSION, 1403 "ASUS PR-DLS ACPI BIOS Revision 1010"), 1404 DMI_MATCH(DMI_BIOS_DATE, "03/21/2003") 1405 }, 1406 }, 1407 { 1408 .callback = disable_acpi_pci, 1409 .ident = "Acer TravelMate 36x Laptop", 1410 .matches = { 1411 DMI_MATCH(DMI_SYS_VENDOR, "Acer"), 1412 DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"), 1413 }, 1414 }, 1415 {} 1416 }; 1417 1418 /* second table for DMI checks that should run after early-quirks */ 1419 static struct dmi_system_id __initdata acpi_dmi_table_late[] = { 1420 /* 1421 * HP laptops which use a DSDT reporting as HP/SB400/10000, 1422 * which includes some code which overrides all temperature 1423 * trip points to 16C if the INTIN2 input of the I/O APIC 1424 * is enabled. This input is incorrectly designated the 1425 * ISA IRQ 0 via an interrupt source override even though 1426 * it is wired to the output of the master 8259A and INTIN0 1427 * is not connected at all. Force ignoring BIOS IRQ0 1428 * override in that cases. 1429 */ 1430 { 1431 .callback = dmi_ignore_irq0_timer_override, 1432 .ident = "HP nx6115 laptop", 1433 .matches = { 1434 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 1435 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6115"), 1436 }, 1437 }, 1438 { 1439 .callback = dmi_ignore_irq0_timer_override, 1440 .ident = "HP NX6125 laptop", 1441 .matches = { 1442 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 1443 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6125"), 1444 }, 1445 }, 1446 { 1447 .callback = dmi_ignore_irq0_timer_override, 1448 .ident = "HP NX6325 laptop", 1449 .matches = { 1450 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 1451 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6325"), 1452 }, 1453 }, 1454 { 1455 .callback = dmi_ignore_irq0_timer_override, 1456 .ident = "HP 6715b laptop", 1457 .matches = { 1458 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 1459 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq 6715b"), 1460 }, 1461 }, 1462 { 1463 .callback = dmi_ignore_irq0_timer_override, 1464 .ident = "FUJITSU SIEMENS", 1465 .matches = { 1466 DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"), 1467 DMI_MATCH(DMI_PRODUCT_NAME, "AMILO PRO V2030"), 1468 }, 1469 }, 1470 {} 1471 }; 1472 1473 /* 1474 * acpi_boot_table_init() and acpi_boot_init() 1475 * called from setup_arch(), always. 1476 * 1. checksums all tables 1477 * 2. enumerates lapics 1478 * 3. enumerates io-apics 1479 * 1480 * acpi_table_init() is separate to allow reading SRAT without 1481 * other side effects. 1482 * 1483 * side effects of acpi_boot_init: 1484 * acpi_lapic = 1 if LAPIC found 1485 * acpi_ioapic = 1 if IOAPIC found 1486 * if (acpi_lapic && acpi_ioapic) smp_found_config = 1; 1487 * if acpi_blacklisted() acpi_disabled = 1; 1488 * acpi_irq_model=... 1489 * ... 1490 */ 1491 1492 void __init acpi_boot_table_init(void) 1493 { 1494 dmi_check_system(acpi_dmi_table); 1495 1496 /* 1497 * If acpi_disabled, bail out 1498 */ 1499 if (acpi_disabled) 1500 return; 1501 1502 /* 1503 * Initialize the ACPI boot-time table parser. 1504 */ 1505 if (acpi_table_init()) { 1506 disable_acpi(); 1507 return; 1508 } 1509 1510 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf); 1511 1512 /* 1513 * blacklist may disable ACPI entirely 1514 */ 1515 if (acpi_blacklisted()) { 1516 if (acpi_force) { 1517 printk(KERN_WARNING PREFIX "acpi=force override\n"); 1518 } else { 1519 printk(KERN_WARNING PREFIX "Disabling ACPI support\n"); 1520 disable_acpi(); 1521 return; 1522 } 1523 } 1524 } 1525 1526 int __init early_acpi_boot_init(void) 1527 { 1528 /* 1529 * If acpi_disabled, bail out 1530 */ 1531 if (acpi_disabled) 1532 return 1; 1533 1534 /* 1535 * Process the Multiple APIC Description Table (MADT), if present 1536 */ 1537 early_acpi_process_madt(); 1538 1539 /* 1540 * Hardware-reduced ACPI mode initialization: 1541 */ 1542 acpi_reduced_hw_init(); 1543 1544 return 0; 1545 } 1546 1547 int __init acpi_boot_init(void) 1548 { 1549 /* those are executed after early-quirks are executed */ 1550 dmi_check_system(acpi_dmi_table_late); 1551 1552 /* 1553 * If acpi_disabled, bail out 1554 */ 1555 if (acpi_disabled) 1556 return 1; 1557 1558 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf); 1559 1560 /* 1561 * set sci_int and PM timer address 1562 */ 1563 acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt); 1564 1565 /* 1566 * Process the Multiple APIC Description Table (MADT), if present 1567 */ 1568 acpi_process_madt(); 1569 1570 acpi_table_parse(ACPI_SIG_HPET, acpi_parse_hpet); 1571 1572 if (!acpi_noirq) 1573 x86_init.pci.init = pci_acpi_init; 1574 1575 return 0; 1576 } 1577 1578 static int __init parse_acpi(char *arg) 1579 { 1580 if (!arg) 1581 return -EINVAL; 1582 1583 /* "acpi=off" disables both ACPI table parsing and interpreter */ 1584 if (strcmp(arg, "off") == 0) { 1585 disable_acpi(); 1586 } 1587 /* acpi=force to over-ride black-list */ 1588 else if (strcmp(arg, "force") == 0) { 1589 acpi_force = 1; 1590 acpi_disabled = 0; 1591 } 1592 /* acpi=strict disables out-of-spec workarounds */ 1593 else if (strcmp(arg, "strict") == 0) { 1594 acpi_strict = 1; 1595 } 1596 /* acpi=rsdt use RSDT instead of XSDT */ 1597 else if (strcmp(arg, "rsdt") == 0) { 1598 acpi_gbl_do_not_use_xsdt = TRUE; 1599 } 1600 /* "acpi=noirq" disables ACPI interrupt routing */ 1601 else if (strcmp(arg, "noirq") == 0) { 1602 acpi_noirq_set(); 1603 } 1604 /* "acpi=copy_dsdt" copys DSDT */ 1605 else if (strcmp(arg, "copy_dsdt") == 0) { 1606 acpi_gbl_copy_dsdt_locally = 1; 1607 } 1608 /* "acpi=nocmcff" disables FF mode for corrected errors */ 1609 else if (strcmp(arg, "nocmcff") == 0) { 1610 acpi_disable_cmcff = 1; 1611 } else { 1612 /* Core will printk when we return error. */ 1613 return -EINVAL; 1614 } 1615 return 0; 1616 } 1617 early_param("acpi", parse_acpi); 1618 1619 /* FIXME: Using pci= for an ACPI parameter is a travesty. */ 1620 static int __init parse_pci(char *arg) 1621 { 1622 if (arg && strcmp(arg, "noacpi") == 0) 1623 acpi_disable_pci(); 1624 return 0; 1625 } 1626 early_param("pci", parse_pci); 1627 1628 int __init acpi_mps_check(void) 1629 { 1630 #if defined(CONFIG_X86_LOCAL_APIC) && !defined(CONFIG_X86_MPPARSE) 1631 /* mptable code is not built-in*/ 1632 if (acpi_disabled || acpi_noirq) { 1633 printk(KERN_WARNING "MPS support code is not built-in.\n" 1634 "Using acpi=off or acpi=noirq or pci=noacpi " 1635 "may have problem\n"); 1636 return 1; 1637 } 1638 #endif 1639 return 0; 1640 } 1641 1642 #ifdef CONFIG_X86_IO_APIC 1643 static int __init parse_acpi_skip_timer_override(char *arg) 1644 { 1645 acpi_skip_timer_override = 1; 1646 return 0; 1647 } 1648 early_param("acpi_skip_timer_override", parse_acpi_skip_timer_override); 1649 1650 static int __init parse_acpi_use_timer_override(char *arg) 1651 { 1652 acpi_use_timer_override = 1; 1653 return 0; 1654 } 1655 early_param("acpi_use_timer_override", parse_acpi_use_timer_override); 1656 #endif /* CONFIG_X86_IO_APIC */ 1657 1658 static int __init setup_acpi_sci(char *s) 1659 { 1660 if (!s) 1661 return -EINVAL; 1662 if (!strcmp(s, "edge")) 1663 acpi_sci_flags = ACPI_MADT_TRIGGER_EDGE | 1664 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK); 1665 else if (!strcmp(s, "level")) 1666 acpi_sci_flags = ACPI_MADT_TRIGGER_LEVEL | 1667 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK); 1668 else if (!strcmp(s, "high")) 1669 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_HIGH | 1670 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK); 1671 else if (!strcmp(s, "low")) 1672 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_LOW | 1673 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK); 1674 else 1675 return -EINVAL; 1676 return 0; 1677 } 1678 early_param("acpi_sci", setup_acpi_sci); 1679 1680 int __acpi_acquire_global_lock(unsigned int *lock) 1681 { 1682 unsigned int old, new, val; 1683 do { 1684 old = *lock; 1685 new = (((old & ~0x3) + 2) + ((old >> 1) & 0x1)); 1686 val = cmpxchg(lock, old, new); 1687 } while (unlikely (val != old)); 1688 return (new < 3) ? -1 : 0; 1689 } 1690 1691 int __acpi_release_global_lock(unsigned int *lock) 1692 { 1693 unsigned int old, new, val; 1694 do { 1695 old = *lock; 1696 new = old & ~0x3; 1697 val = cmpxchg(lock, old, new); 1698 } while (unlikely (val != old)); 1699 return old & 0x1; 1700 } 1701 1702 void __init arch_reserve_mem_area(acpi_physical_address addr, size_t size) 1703 { 1704 e820_add_region(addr, size, E820_ACPI); 1705 update_e820(); 1706 } 1707