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/export.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 (!boot_cpu_has(X86_FEATURE_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 * @acpiid: ACPI id to register 165 * @enabled: this cpu is enabled or not 166 * 167 * Returns the logic cpu number which maps to the local apic 168 */ 169 static int acpi_register_lapic(int id, u32 acpiid, u8 enabled) 170 { 171 unsigned int ver = 0; 172 int cpu; 173 174 if (id >= MAX_LOCAL_APIC) { 175 printk(KERN_INFO PREFIX "skipped apicid that is too big\n"); 176 return -EINVAL; 177 } 178 179 if (boot_cpu_physical_apicid != -1U) 180 ver = boot_cpu_apic_version; 181 182 cpu = __generic_processor_info(id, ver, enabled); 183 if (cpu >= 0) 184 early_per_cpu(x86_cpu_to_acpiid, cpu) = acpiid; 185 186 return cpu; 187 } 188 189 static int __init 190 acpi_parse_x2apic(struct acpi_subtable_header *header, const unsigned long end) 191 { 192 struct acpi_madt_local_x2apic *processor = NULL; 193 int apic_id; 194 u8 enabled; 195 196 processor = (struct acpi_madt_local_x2apic *)header; 197 198 if (BAD_MADT_ENTRY(processor, end)) 199 return -EINVAL; 200 201 acpi_table_print_madt_entry(header); 202 203 apic_id = processor->local_apic_id; 204 enabled = processor->lapic_flags & ACPI_MADT_ENABLED; 205 #ifdef CONFIG_X86_X2APIC 206 /* 207 * We need to register disabled CPU as well to permit 208 * counting disabled CPUs. This allows us to size 209 * cpus_possible_map more accurately, to permit 210 * to not preallocating memory for all NR_CPUS 211 * when we use CPU hotplug. 212 */ 213 if (!apic->apic_id_valid(apic_id) && enabled) 214 printk(KERN_WARNING PREFIX "x2apic entry ignored\n"); 215 else 216 acpi_register_lapic(apic_id, processor->uid, enabled); 217 #else 218 printk(KERN_WARNING PREFIX "x2apic entry ignored\n"); 219 #endif 220 221 return 0; 222 } 223 224 static int __init 225 acpi_parse_lapic(struct acpi_subtable_header * header, const unsigned long end) 226 { 227 struct acpi_madt_local_apic *processor = NULL; 228 229 processor = (struct acpi_madt_local_apic *)header; 230 231 if (BAD_MADT_ENTRY(processor, end)) 232 return -EINVAL; 233 234 acpi_table_print_madt_entry(header); 235 236 /* Ignore invalid ID */ 237 if (processor->id == 0xff) 238 return 0; 239 240 /* 241 * We need to register disabled CPU as well to permit 242 * counting disabled CPUs. This allows us to size 243 * cpus_possible_map more accurately, to permit 244 * to not preallocating memory for all NR_CPUS 245 * when we use CPU hotplug. 246 */ 247 acpi_register_lapic(processor->id, /* APIC ID */ 248 processor->processor_id, /* ACPI ID */ 249 processor->lapic_flags & ACPI_MADT_ENABLED); 250 251 return 0; 252 } 253 254 static int __init 255 acpi_parse_sapic(struct acpi_subtable_header *header, const unsigned long end) 256 { 257 struct acpi_madt_local_sapic *processor = NULL; 258 259 processor = (struct acpi_madt_local_sapic *)header; 260 261 if (BAD_MADT_ENTRY(processor, end)) 262 return -EINVAL; 263 264 acpi_table_print_madt_entry(header); 265 266 acpi_register_lapic((processor->id << 8) | processor->eid,/* APIC ID */ 267 processor->processor_id, /* ACPI ID */ 268 processor->lapic_flags & ACPI_MADT_ENABLED); 269 270 return 0; 271 } 272 273 static int __init 274 acpi_parse_lapic_addr_ovr(struct acpi_subtable_header * header, 275 const unsigned long end) 276 { 277 struct acpi_madt_local_apic_override *lapic_addr_ovr = NULL; 278 279 lapic_addr_ovr = (struct acpi_madt_local_apic_override *)header; 280 281 if (BAD_MADT_ENTRY(lapic_addr_ovr, end)) 282 return -EINVAL; 283 284 acpi_table_print_madt_entry(header); 285 286 acpi_lapic_addr = lapic_addr_ovr->address; 287 288 return 0; 289 } 290 291 static int __init 292 acpi_parse_x2apic_nmi(struct acpi_subtable_header *header, 293 const unsigned long end) 294 { 295 struct acpi_madt_local_x2apic_nmi *x2apic_nmi = NULL; 296 297 x2apic_nmi = (struct acpi_madt_local_x2apic_nmi *)header; 298 299 if (BAD_MADT_ENTRY(x2apic_nmi, end)) 300 return -EINVAL; 301 302 acpi_table_print_madt_entry(header); 303 304 if (x2apic_nmi->lint != 1) 305 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n"); 306 307 return 0; 308 } 309 310 static int __init 311 acpi_parse_lapic_nmi(struct acpi_subtable_header * header, const unsigned long end) 312 { 313 struct acpi_madt_local_apic_nmi *lapic_nmi = NULL; 314 315 lapic_nmi = (struct acpi_madt_local_apic_nmi *)header; 316 317 if (BAD_MADT_ENTRY(lapic_nmi, end)) 318 return -EINVAL; 319 320 acpi_table_print_madt_entry(header); 321 322 if (lapic_nmi->lint != 1) 323 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n"); 324 325 return 0; 326 } 327 328 #endif /*CONFIG_X86_LOCAL_APIC */ 329 330 #ifdef CONFIG_X86_IO_APIC 331 #define MP_ISA_BUS 0 332 333 static void __init mp_override_legacy_irq(u8 bus_irq, u8 polarity, u8 trigger, 334 u32 gsi) 335 { 336 int ioapic; 337 int pin; 338 struct mpc_intsrc mp_irq; 339 340 /* 341 * Convert 'gsi' to 'ioapic.pin'. 342 */ 343 ioapic = mp_find_ioapic(gsi); 344 if (ioapic < 0) 345 return; 346 pin = mp_find_ioapic_pin(ioapic, gsi); 347 348 /* 349 * TBD: This check is for faulty timer entries, where the override 350 * erroneously sets the trigger to level, resulting in a HUGE 351 * increase of timer interrupts! 352 */ 353 if ((bus_irq == 0) && (trigger == 3)) 354 trigger = 1; 355 356 mp_irq.type = MP_INTSRC; 357 mp_irq.irqtype = mp_INT; 358 mp_irq.irqflag = (trigger << 2) | polarity; 359 mp_irq.srcbus = MP_ISA_BUS; 360 mp_irq.srcbusirq = bus_irq; /* IRQ */ 361 mp_irq.dstapic = mpc_ioapic_id(ioapic); /* APIC ID */ 362 mp_irq.dstirq = pin; /* INTIN# */ 363 364 mp_save_irq(&mp_irq); 365 366 /* 367 * Reset default identity mapping if gsi is also an legacy IRQ, 368 * otherwise there will be more than one entry with the same GSI 369 * and acpi_isa_irq_to_gsi() may give wrong result. 370 */ 371 if (gsi < nr_legacy_irqs() && isa_irq_to_gsi[gsi] == gsi) 372 isa_irq_to_gsi[gsi] = ACPI_INVALID_GSI; 373 isa_irq_to_gsi[bus_irq] = gsi; 374 } 375 376 static int mp_config_acpi_gsi(struct device *dev, u32 gsi, int trigger, 377 int polarity) 378 { 379 #ifdef CONFIG_X86_MPPARSE 380 struct mpc_intsrc mp_irq; 381 struct pci_dev *pdev; 382 unsigned char number; 383 unsigned int devfn; 384 int ioapic; 385 u8 pin; 386 387 if (!acpi_ioapic) 388 return 0; 389 if (!dev || !dev_is_pci(dev)) 390 return 0; 391 392 pdev = to_pci_dev(dev); 393 number = pdev->bus->number; 394 devfn = pdev->devfn; 395 pin = pdev->pin; 396 /* print the entry should happen on mptable identically */ 397 mp_irq.type = MP_INTSRC; 398 mp_irq.irqtype = mp_INT; 399 mp_irq.irqflag = (trigger == ACPI_EDGE_SENSITIVE ? 4 : 0x0c) | 400 (polarity == ACPI_ACTIVE_HIGH ? 1 : 3); 401 mp_irq.srcbus = number; 402 mp_irq.srcbusirq = (((devfn >> 3) & 0x1f) << 2) | ((pin - 1) & 3); 403 ioapic = mp_find_ioapic(gsi); 404 mp_irq.dstapic = mpc_ioapic_id(ioapic); 405 mp_irq.dstirq = mp_find_ioapic_pin(ioapic, gsi); 406 407 mp_save_irq(&mp_irq); 408 #endif 409 return 0; 410 } 411 412 static int __init 413 acpi_parse_ioapic(struct acpi_subtable_header * header, const unsigned long end) 414 { 415 struct acpi_madt_io_apic *ioapic = NULL; 416 struct ioapic_domain_cfg cfg = { 417 .type = IOAPIC_DOMAIN_DYNAMIC, 418 .ops = &mp_ioapic_irqdomain_ops, 419 }; 420 421 ioapic = (struct acpi_madt_io_apic *)header; 422 423 if (BAD_MADT_ENTRY(ioapic, end)) 424 return -EINVAL; 425 426 acpi_table_print_madt_entry(header); 427 428 /* Statically assign IRQ numbers for IOAPICs hosting legacy IRQs */ 429 if (ioapic->global_irq_base < nr_legacy_irqs()) 430 cfg.type = IOAPIC_DOMAIN_LEGACY; 431 432 mp_register_ioapic(ioapic->id, ioapic->address, ioapic->global_irq_base, 433 &cfg); 434 435 return 0; 436 } 437 438 /* 439 * Parse Interrupt Source Override for the ACPI SCI 440 */ 441 static void __init acpi_sci_ioapic_setup(u8 bus_irq, u16 polarity, u16 trigger, u32 gsi) 442 { 443 if (trigger == 0) /* compatible SCI trigger is level */ 444 trigger = 3; 445 446 if (polarity == 0) /* compatible SCI polarity is low */ 447 polarity = 3; 448 449 /* Command-line over-ride via acpi_sci= */ 450 if (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) 451 trigger = (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2; 452 453 if (acpi_sci_flags & ACPI_MADT_POLARITY_MASK) 454 polarity = acpi_sci_flags & ACPI_MADT_POLARITY_MASK; 455 456 mp_override_legacy_irq(bus_irq, polarity, trigger, gsi); 457 458 /* 459 * stash over-ride to indicate we've been here 460 * and for later update of acpi_gbl_FADT 461 */ 462 acpi_sci_override_gsi = gsi; 463 return; 464 } 465 466 static int __init 467 acpi_parse_int_src_ovr(struct acpi_subtable_header * header, 468 const unsigned long end) 469 { 470 struct acpi_madt_interrupt_override *intsrc = NULL; 471 472 intsrc = (struct acpi_madt_interrupt_override *)header; 473 474 if (BAD_MADT_ENTRY(intsrc, end)) 475 return -EINVAL; 476 477 acpi_table_print_madt_entry(header); 478 479 if (intsrc->source_irq == acpi_gbl_FADT.sci_interrupt) { 480 acpi_sci_ioapic_setup(intsrc->source_irq, 481 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK, 482 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2, 483 intsrc->global_irq); 484 return 0; 485 } 486 487 if (intsrc->source_irq == 0) { 488 if (acpi_skip_timer_override) { 489 printk(PREFIX "BIOS IRQ0 override ignored.\n"); 490 return 0; 491 } 492 493 if ((intsrc->global_irq == 2) && acpi_fix_pin2_polarity 494 && (intsrc->inti_flags & ACPI_MADT_POLARITY_MASK)) { 495 intsrc->inti_flags &= ~ACPI_MADT_POLARITY_MASK; 496 printk(PREFIX "BIOS IRQ0 pin2 override: forcing polarity to high active.\n"); 497 } 498 } 499 500 mp_override_legacy_irq(intsrc->source_irq, 501 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK, 502 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2, 503 intsrc->global_irq); 504 505 return 0; 506 } 507 508 static int __init 509 acpi_parse_nmi_src(struct acpi_subtable_header * header, const unsigned long end) 510 { 511 struct acpi_madt_nmi_source *nmi_src = NULL; 512 513 nmi_src = (struct acpi_madt_nmi_source *)header; 514 515 if (BAD_MADT_ENTRY(nmi_src, end)) 516 return -EINVAL; 517 518 acpi_table_print_madt_entry(header); 519 520 /* TBD: Support nimsrc entries? */ 521 522 return 0; 523 } 524 525 #endif /* CONFIG_X86_IO_APIC */ 526 527 /* 528 * acpi_pic_sci_set_trigger() 529 * 530 * use ELCR to set PIC-mode trigger type for SCI 531 * 532 * If a PIC-mode SCI is not recognized or gives spurious IRQ7's 533 * it may require Edge Trigger -- use "acpi_sci=edge" 534 * 535 * Port 0x4d0-4d1 are ECLR1 and ECLR2, the Edge/Level Control Registers 536 * for the 8259 PIC. bit[n] = 1 means irq[n] is Level, otherwise Edge. 537 * ECLR1 is IRQs 0-7 (IRQ 0, 1, 2 must be 0) 538 * ECLR2 is IRQs 8-15 (IRQ 8, 13 must be 0) 539 */ 540 541 void __init acpi_pic_sci_set_trigger(unsigned int irq, u16 trigger) 542 { 543 unsigned int mask = 1 << irq; 544 unsigned int old, new; 545 546 /* Real old ELCR mask */ 547 old = inb(0x4d0) | (inb(0x4d1) << 8); 548 549 /* 550 * If we use ACPI to set PCI IRQs, then we should clear ELCR 551 * since we will set it correctly as we enable the PCI irq 552 * routing. 553 */ 554 new = acpi_noirq ? old : 0; 555 556 /* 557 * Update SCI information in the ELCR, it isn't in the PCI 558 * routing tables.. 559 */ 560 switch (trigger) { 561 case 1: /* Edge - clear */ 562 new &= ~mask; 563 break; 564 case 3: /* Level - set */ 565 new |= mask; 566 break; 567 } 568 569 if (old == new) 570 return; 571 572 printk(PREFIX "setting ELCR to %04x (from %04x)\n", new, old); 573 outb(new, 0x4d0); 574 outb(new >> 8, 0x4d1); 575 } 576 577 int acpi_gsi_to_irq(u32 gsi, unsigned int *irqp) 578 { 579 int rc, irq, trigger, polarity; 580 581 if (acpi_irq_model == ACPI_IRQ_MODEL_PIC) { 582 *irqp = gsi; 583 return 0; 584 } 585 586 rc = acpi_get_override_irq(gsi, &trigger, &polarity); 587 if (rc == 0) { 588 trigger = trigger ? ACPI_LEVEL_SENSITIVE : ACPI_EDGE_SENSITIVE; 589 polarity = polarity ? ACPI_ACTIVE_LOW : ACPI_ACTIVE_HIGH; 590 irq = acpi_register_gsi(NULL, gsi, trigger, polarity); 591 if (irq >= 0) { 592 *irqp = irq; 593 return 0; 594 } 595 } 596 597 return -1; 598 } 599 EXPORT_SYMBOL_GPL(acpi_gsi_to_irq); 600 601 int acpi_isa_irq_to_gsi(unsigned isa_irq, u32 *gsi) 602 { 603 if (isa_irq < nr_legacy_irqs() && 604 isa_irq_to_gsi[isa_irq] != ACPI_INVALID_GSI) { 605 *gsi = isa_irq_to_gsi[isa_irq]; 606 return 0; 607 } 608 609 return -1; 610 } 611 612 static int acpi_register_gsi_pic(struct device *dev, u32 gsi, 613 int trigger, int polarity) 614 { 615 #ifdef CONFIG_PCI 616 /* 617 * Make sure all (legacy) PCI IRQs are set as level-triggered. 618 */ 619 if (trigger == ACPI_LEVEL_SENSITIVE) 620 elcr_set_level_irq(gsi); 621 #endif 622 623 return gsi; 624 } 625 626 #ifdef CONFIG_X86_LOCAL_APIC 627 static int acpi_register_gsi_ioapic(struct device *dev, u32 gsi, 628 int trigger, int polarity) 629 { 630 int irq = gsi; 631 #ifdef CONFIG_X86_IO_APIC 632 int node; 633 struct irq_alloc_info info; 634 635 node = dev ? dev_to_node(dev) : NUMA_NO_NODE; 636 trigger = trigger == ACPI_EDGE_SENSITIVE ? 0 : 1; 637 polarity = polarity == ACPI_ACTIVE_HIGH ? 0 : 1; 638 ioapic_set_alloc_attr(&info, node, trigger, polarity); 639 640 mutex_lock(&acpi_ioapic_lock); 641 irq = mp_map_gsi_to_irq(gsi, IOAPIC_MAP_ALLOC, &info); 642 /* Don't set up the ACPI SCI because it's already set up */ 643 if (irq >= 0 && enable_update_mptable && 644 acpi_gbl_FADT.sci_interrupt != gsi) 645 mp_config_acpi_gsi(dev, gsi, trigger, polarity); 646 mutex_unlock(&acpi_ioapic_lock); 647 #endif 648 649 return irq; 650 } 651 652 static void acpi_unregister_gsi_ioapic(u32 gsi) 653 { 654 #ifdef CONFIG_X86_IO_APIC 655 int irq; 656 657 mutex_lock(&acpi_ioapic_lock); 658 irq = mp_map_gsi_to_irq(gsi, 0, NULL); 659 if (irq > 0) 660 mp_unmap_irq(irq); 661 mutex_unlock(&acpi_ioapic_lock); 662 #endif 663 } 664 #endif 665 666 int (*__acpi_register_gsi)(struct device *dev, u32 gsi, 667 int trigger, int polarity) = acpi_register_gsi_pic; 668 void (*__acpi_unregister_gsi)(u32 gsi) = NULL; 669 670 #ifdef CONFIG_ACPI_SLEEP 671 int (*acpi_suspend_lowlevel)(void) = x86_acpi_suspend_lowlevel; 672 #else 673 int (*acpi_suspend_lowlevel)(void); 674 #endif 675 676 /* 677 * success: return IRQ number (>=0) 678 * failure: return < 0 679 */ 680 int acpi_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity) 681 { 682 return __acpi_register_gsi(dev, gsi, trigger, polarity); 683 } 684 EXPORT_SYMBOL_GPL(acpi_register_gsi); 685 686 void acpi_unregister_gsi(u32 gsi) 687 { 688 if (__acpi_unregister_gsi) 689 __acpi_unregister_gsi(gsi); 690 } 691 EXPORT_SYMBOL_GPL(acpi_unregister_gsi); 692 693 #ifdef CONFIG_X86_LOCAL_APIC 694 static void __init acpi_set_irq_model_ioapic(void) 695 { 696 acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC; 697 __acpi_register_gsi = acpi_register_gsi_ioapic; 698 __acpi_unregister_gsi = acpi_unregister_gsi_ioapic; 699 acpi_ioapic = 1; 700 } 701 #endif 702 703 /* 704 * ACPI based hotplug support for CPU 705 */ 706 #ifdef CONFIG_ACPI_HOTPLUG_CPU 707 #include <acpi/processor.h> 708 709 int acpi_map_cpu2node(acpi_handle handle, int cpu, int physid) 710 { 711 #ifdef CONFIG_ACPI_NUMA 712 int nid; 713 714 nid = acpi_get_node(handle); 715 if (nid != -1) { 716 set_apicid_to_node(physid, nid); 717 numa_set_node(cpu, nid); 718 } 719 #endif 720 return 0; 721 } 722 723 int acpi_map_cpu(acpi_handle handle, phys_cpuid_t physid, int *pcpu) 724 { 725 int cpu; 726 727 cpu = acpi_register_lapic(physid, U32_MAX, ACPI_MADT_ENABLED); 728 if (cpu < 0) { 729 pr_info(PREFIX "Unable to map lapic to logical cpu number\n"); 730 return cpu; 731 } 732 733 acpi_processor_set_pdc(handle); 734 acpi_map_cpu2node(handle, cpu, physid); 735 736 *pcpu = cpu; 737 return 0; 738 } 739 EXPORT_SYMBOL(acpi_map_cpu); 740 741 int acpi_unmap_cpu(int cpu) 742 { 743 #ifdef CONFIG_ACPI_NUMA 744 set_apicid_to_node(per_cpu(x86_cpu_to_apicid, cpu), NUMA_NO_NODE); 745 #endif 746 747 per_cpu(x86_cpu_to_apicid, cpu) = -1; 748 set_cpu_present(cpu, false); 749 num_processors--; 750 751 return (0); 752 } 753 EXPORT_SYMBOL(acpi_unmap_cpu); 754 #endif /* CONFIG_ACPI_HOTPLUG_CPU */ 755 756 int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base) 757 { 758 int ret = -ENOSYS; 759 #ifdef CONFIG_ACPI_HOTPLUG_IOAPIC 760 int ioapic_id; 761 u64 addr; 762 struct ioapic_domain_cfg cfg = { 763 .type = IOAPIC_DOMAIN_DYNAMIC, 764 .ops = &mp_ioapic_irqdomain_ops, 765 }; 766 767 ioapic_id = acpi_get_ioapic_id(handle, gsi_base, &addr); 768 if (ioapic_id < 0) { 769 unsigned long long uid; 770 acpi_status status; 771 772 status = acpi_evaluate_integer(handle, METHOD_NAME__UID, 773 NULL, &uid); 774 if (ACPI_FAILURE(status)) { 775 acpi_handle_warn(handle, "failed to get IOAPIC ID.\n"); 776 return -EINVAL; 777 } 778 ioapic_id = (int)uid; 779 } 780 781 mutex_lock(&acpi_ioapic_lock); 782 ret = mp_register_ioapic(ioapic_id, phys_addr, gsi_base, &cfg); 783 mutex_unlock(&acpi_ioapic_lock); 784 #endif 785 786 return ret; 787 } 788 EXPORT_SYMBOL(acpi_register_ioapic); 789 790 int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base) 791 { 792 int ret = -ENOSYS; 793 794 #ifdef CONFIG_ACPI_HOTPLUG_IOAPIC 795 mutex_lock(&acpi_ioapic_lock); 796 ret = mp_unregister_ioapic(gsi_base); 797 mutex_unlock(&acpi_ioapic_lock); 798 #endif 799 800 return ret; 801 } 802 EXPORT_SYMBOL(acpi_unregister_ioapic); 803 804 /** 805 * acpi_ioapic_registered - Check whether IOAPIC assoicatied with @gsi_base 806 * has been registered 807 * @handle: ACPI handle of the IOAPIC deivce 808 * @gsi_base: GSI base associated with the IOAPIC 809 * 810 * Assume caller holds some type of lock to serialize acpi_ioapic_registered() 811 * with acpi_register_ioapic()/acpi_unregister_ioapic(). 812 */ 813 int acpi_ioapic_registered(acpi_handle handle, u32 gsi_base) 814 { 815 int ret = 0; 816 817 #ifdef CONFIG_ACPI_HOTPLUG_IOAPIC 818 mutex_lock(&acpi_ioapic_lock); 819 ret = mp_ioapic_registered(gsi_base); 820 mutex_unlock(&acpi_ioapic_lock); 821 #endif 822 823 return ret; 824 } 825 826 static int __init acpi_parse_sbf(struct acpi_table_header *table) 827 { 828 struct acpi_table_boot *sb = (struct acpi_table_boot *)table; 829 830 sbf_port = sb->cmos_index; /* Save CMOS port */ 831 832 return 0; 833 } 834 835 #ifdef CONFIG_HPET_TIMER 836 #include <asm/hpet.h> 837 838 static struct resource *hpet_res __initdata; 839 840 static int __init acpi_parse_hpet(struct acpi_table_header *table) 841 { 842 struct acpi_table_hpet *hpet_tbl = (struct acpi_table_hpet *)table; 843 844 if (hpet_tbl->address.space_id != ACPI_SPACE_MEM) { 845 printk(KERN_WARNING PREFIX "HPET timers must be located in " 846 "memory.\n"); 847 return -1; 848 } 849 850 hpet_address = hpet_tbl->address.address; 851 hpet_blockid = hpet_tbl->sequence; 852 853 /* 854 * Some broken BIOSes advertise HPET at 0x0. We really do not 855 * want to allocate a resource there. 856 */ 857 if (!hpet_address) { 858 printk(KERN_WARNING PREFIX 859 "HPET id: %#x base: %#lx is invalid\n", 860 hpet_tbl->id, hpet_address); 861 return 0; 862 } 863 #ifdef CONFIG_X86_64 864 /* 865 * Some even more broken BIOSes advertise HPET at 866 * 0xfed0000000000000 instead of 0xfed00000. Fix it up and add 867 * some noise: 868 */ 869 if (hpet_address == 0xfed0000000000000UL) { 870 if (!hpet_force_user) { 871 printk(KERN_WARNING PREFIX "HPET id: %#x " 872 "base: 0xfed0000000000000 is bogus\n " 873 "try hpet=force on the kernel command line to " 874 "fix it up to 0xfed00000.\n", hpet_tbl->id); 875 hpet_address = 0; 876 return 0; 877 } 878 printk(KERN_WARNING PREFIX 879 "HPET id: %#x base: 0xfed0000000000000 fixed up " 880 "to 0xfed00000.\n", hpet_tbl->id); 881 hpet_address >>= 32; 882 } 883 #endif 884 printk(KERN_INFO PREFIX "HPET id: %#x base: %#lx\n", 885 hpet_tbl->id, hpet_address); 886 887 /* 888 * Allocate and initialize the HPET firmware resource for adding into 889 * the resource tree during the lateinit timeframe. 890 */ 891 #define HPET_RESOURCE_NAME_SIZE 9 892 hpet_res = alloc_bootmem(sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE); 893 894 hpet_res->name = (void *)&hpet_res[1]; 895 hpet_res->flags = IORESOURCE_MEM; 896 snprintf((char *)hpet_res->name, HPET_RESOURCE_NAME_SIZE, "HPET %u", 897 hpet_tbl->sequence); 898 899 hpet_res->start = hpet_address; 900 hpet_res->end = hpet_address + (1 * 1024) - 1; 901 902 return 0; 903 } 904 905 /* 906 * hpet_insert_resource inserts the HPET resources used into the resource 907 * tree. 908 */ 909 static __init int hpet_insert_resource(void) 910 { 911 if (!hpet_res) 912 return 1; 913 914 return insert_resource(&iomem_resource, hpet_res); 915 } 916 917 late_initcall(hpet_insert_resource); 918 919 #else 920 #define acpi_parse_hpet NULL 921 #endif 922 923 static int __init acpi_parse_fadt(struct acpi_table_header *table) 924 { 925 if (!(acpi_gbl_FADT.boot_flags & ACPI_FADT_LEGACY_DEVICES)) { 926 pr_debug("ACPI: no legacy devices present\n"); 927 x86_platform.legacy.devices.pnpbios = 0; 928 } 929 930 if (acpi_gbl_FADT.boot_flags & ACPI_FADT_NO_CMOS_RTC) { 931 pr_debug("ACPI: not registering RTC platform device\n"); 932 x86_platform.legacy.rtc = 0; 933 } 934 935 #ifdef CONFIG_X86_PM_TIMER 936 /* detect the location of the ACPI PM Timer */ 937 if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID) { 938 /* FADT rev. 2 */ 939 if (acpi_gbl_FADT.xpm_timer_block.space_id != 940 ACPI_ADR_SPACE_SYSTEM_IO) 941 return 0; 942 943 pmtmr_ioport = acpi_gbl_FADT.xpm_timer_block.address; 944 /* 945 * "X" fields are optional extensions to the original V1.0 946 * fields, so we must selectively expand V1.0 fields if the 947 * corresponding X field is zero. 948 */ 949 if (!pmtmr_ioport) 950 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block; 951 } else { 952 /* FADT rev. 1 */ 953 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block; 954 } 955 if (pmtmr_ioport) 956 printk(KERN_INFO PREFIX "PM-Timer IO Port: %#x\n", 957 pmtmr_ioport); 958 #endif 959 return 0; 960 } 961 962 #ifdef CONFIG_X86_LOCAL_APIC 963 /* 964 * Parse LAPIC entries in MADT 965 * returns 0 on success, < 0 on error 966 */ 967 968 static int __init early_acpi_parse_madt_lapic_addr_ovr(void) 969 { 970 int count; 971 972 if (!boot_cpu_has(X86_FEATURE_APIC)) 973 return -ENODEV; 974 975 /* 976 * Note that the LAPIC address is obtained from the MADT (32-bit value) 977 * and (optionally) overridden by a LAPIC_ADDR_OVR entry (64-bit value). 978 */ 979 980 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE, 981 acpi_parse_lapic_addr_ovr, 0); 982 if (count < 0) { 983 printk(KERN_ERR PREFIX 984 "Error parsing LAPIC address override entry\n"); 985 return count; 986 } 987 988 register_lapic_address(acpi_lapic_addr); 989 990 return count; 991 } 992 993 static int __init acpi_parse_madt_lapic_entries(void) 994 { 995 int count; 996 int x2count = 0; 997 int ret; 998 struct acpi_subtable_proc madt_proc[2]; 999 1000 if (!boot_cpu_has(X86_FEATURE_APIC)) 1001 return -ENODEV; 1002 1003 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC, 1004 acpi_parse_sapic, MAX_LOCAL_APIC); 1005 1006 if (!count) { 1007 memset(madt_proc, 0, sizeof(madt_proc)); 1008 madt_proc[0].id = ACPI_MADT_TYPE_LOCAL_APIC; 1009 madt_proc[0].handler = acpi_parse_lapic; 1010 madt_proc[1].id = ACPI_MADT_TYPE_LOCAL_X2APIC; 1011 madt_proc[1].handler = acpi_parse_x2apic; 1012 ret = acpi_table_parse_entries_array(ACPI_SIG_MADT, 1013 sizeof(struct acpi_table_madt), 1014 madt_proc, ARRAY_SIZE(madt_proc), MAX_LOCAL_APIC); 1015 if (ret < 0) { 1016 printk(KERN_ERR PREFIX 1017 "Error parsing LAPIC/X2APIC entries\n"); 1018 return ret; 1019 } 1020 1021 count = madt_proc[0].count; 1022 x2count = madt_proc[1].count; 1023 } 1024 if (!count && !x2count) { 1025 printk(KERN_ERR PREFIX "No LAPIC entries present\n"); 1026 /* TBD: Cleanup to allow fallback to MPS */ 1027 return -ENODEV; 1028 } else if (count < 0 || x2count < 0) { 1029 printk(KERN_ERR PREFIX "Error parsing LAPIC entry\n"); 1030 /* TBD: Cleanup to allow fallback to MPS */ 1031 return count; 1032 } 1033 1034 x2count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC_NMI, 1035 acpi_parse_x2apic_nmi, 0); 1036 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI, 1037 acpi_parse_lapic_nmi, 0); 1038 if (count < 0 || x2count < 0) { 1039 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n"); 1040 /* TBD: Cleanup to allow fallback to MPS */ 1041 return count; 1042 } 1043 return 0; 1044 } 1045 #endif /* CONFIG_X86_LOCAL_APIC */ 1046 1047 #ifdef CONFIG_X86_IO_APIC 1048 static void __init mp_config_acpi_legacy_irqs(void) 1049 { 1050 int i; 1051 struct mpc_intsrc mp_irq; 1052 1053 #ifdef CONFIG_EISA 1054 /* 1055 * Fabricate the legacy ISA bus (bus #31). 1056 */ 1057 mp_bus_id_to_type[MP_ISA_BUS] = MP_BUS_ISA; 1058 #endif 1059 set_bit(MP_ISA_BUS, mp_bus_not_pci); 1060 pr_debug("Bus #%d is ISA\n", MP_ISA_BUS); 1061 1062 /* 1063 * Use the default configuration for the IRQs 0-15. Unless 1064 * overridden by (MADT) interrupt source override entries. 1065 */ 1066 for (i = 0; i < nr_legacy_irqs(); i++) { 1067 int ioapic, pin; 1068 unsigned int dstapic; 1069 int idx; 1070 u32 gsi; 1071 1072 /* Locate the gsi that irq i maps to. */ 1073 if (acpi_isa_irq_to_gsi(i, &gsi)) 1074 continue; 1075 1076 /* 1077 * Locate the IOAPIC that manages the ISA IRQ. 1078 */ 1079 ioapic = mp_find_ioapic(gsi); 1080 if (ioapic < 0) 1081 continue; 1082 pin = mp_find_ioapic_pin(ioapic, gsi); 1083 dstapic = mpc_ioapic_id(ioapic); 1084 1085 for (idx = 0; idx < mp_irq_entries; idx++) { 1086 struct mpc_intsrc *irq = mp_irqs + idx; 1087 1088 /* Do we already have a mapping for this ISA IRQ? */ 1089 if (irq->srcbus == MP_ISA_BUS && irq->srcbusirq == i) 1090 break; 1091 1092 /* Do we already have a mapping for this IOAPIC pin */ 1093 if (irq->dstapic == dstapic && irq->dstirq == pin) 1094 break; 1095 } 1096 1097 if (idx != mp_irq_entries) { 1098 printk(KERN_DEBUG "ACPI: IRQ%d used by override.\n", i); 1099 continue; /* IRQ already used */ 1100 } 1101 1102 mp_irq.type = MP_INTSRC; 1103 mp_irq.irqflag = 0; /* Conforming */ 1104 mp_irq.srcbus = MP_ISA_BUS; 1105 mp_irq.dstapic = dstapic; 1106 mp_irq.irqtype = mp_INT; 1107 mp_irq.srcbusirq = i; /* Identity mapped */ 1108 mp_irq.dstirq = pin; 1109 1110 mp_save_irq(&mp_irq); 1111 } 1112 } 1113 1114 /* 1115 * Parse IOAPIC related entries in MADT 1116 * returns 0 on success, < 0 on error 1117 */ 1118 static int __init acpi_parse_madt_ioapic_entries(void) 1119 { 1120 int count; 1121 1122 /* 1123 * ACPI interpreter is required to complete interrupt setup, 1124 * so if it is off, don't enumerate the io-apics with ACPI. 1125 * If MPS is present, it will handle them, 1126 * otherwise the system will stay in PIC mode 1127 */ 1128 if (acpi_disabled || acpi_noirq) 1129 return -ENODEV; 1130 1131 if (!boot_cpu_has(X86_FEATURE_APIC)) 1132 return -ENODEV; 1133 1134 /* 1135 * if "noapic" boot option, don't look for IO-APICs 1136 */ 1137 if (skip_ioapic_setup) { 1138 printk(KERN_INFO PREFIX "Skipping IOAPIC probe " 1139 "due to 'noapic' option.\n"); 1140 return -ENODEV; 1141 } 1142 1143 count = acpi_table_parse_madt(ACPI_MADT_TYPE_IO_APIC, acpi_parse_ioapic, 1144 MAX_IO_APICS); 1145 if (!count) { 1146 printk(KERN_ERR PREFIX "No IOAPIC entries present\n"); 1147 return -ENODEV; 1148 } else if (count < 0) { 1149 printk(KERN_ERR PREFIX "Error parsing IOAPIC entry\n"); 1150 return count; 1151 } 1152 1153 count = acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE, 1154 acpi_parse_int_src_ovr, nr_irqs); 1155 if (count < 0) { 1156 printk(KERN_ERR PREFIX 1157 "Error parsing interrupt source overrides entry\n"); 1158 /* TBD: Cleanup to allow fallback to MPS */ 1159 return count; 1160 } 1161 1162 /* 1163 * If BIOS did not supply an INT_SRC_OVR for the SCI 1164 * pretend we got one so we can set the SCI flags. 1165 */ 1166 if (!acpi_sci_override_gsi) 1167 acpi_sci_ioapic_setup(acpi_gbl_FADT.sci_interrupt, 0, 0, 1168 acpi_gbl_FADT.sci_interrupt); 1169 1170 /* Fill in identity legacy mappings where no override */ 1171 mp_config_acpi_legacy_irqs(); 1172 1173 count = acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE, 1174 acpi_parse_nmi_src, nr_irqs); 1175 if (count < 0) { 1176 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n"); 1177 /* TBD: Cleanup to allow fallback to MPS */ 1178 return count; 1179 } 1180 1181 return 0; 1182 } 1183 #else 1184 static inline int acpi_parse_madt_ioapic_entries(void) 1185 { 1186 return -1; 1187 } 1188 #endif /* !CONFIG_X86_IO_APIC */ 1189 1190 static void __init early_acpi_process_madt(void) 1191 { 1192 #ifdef CONFIG_X86_LOCAL_APIC 1193 int error; 1194 1195 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) { 1196 1197 /* 1198 * Parse MADT LAPIC entries 1199 */ 1200 error = early_acpi_parse_madt_lapic_addr_ovr(); 1201 if (!error) { 1202 acpi_lapic = 1; 1203 smp_found_config = 1; 1204 } 1205 if (error == -EINVAL) { 1206 /* 1207 * Dell Precision Workstation 410, 610 come here. 1208 */ 1209 printk(KERN_ERR PREFIX 1210 "Invalid BIOS MADT, disabling ACPI\n"); 1211 disable_acpi(); 1212 } 1213 } 1214 #endif 1215 } 1216 1217 static void __init acpi_process_madt(void) 1218 { 1219 #ifdef CONFIG_X86_LOCAL_APIC 1220 int error; 1221 1222 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) { 1223 1224 /* 1225 * Parse MADT LAPIC entries 1226 */ 1227 error = acpi_parse_madt_lapic_entries(); 1228 if (!error) { 1229 acpi_lapic = 1; 1230 1231 /* 1232 * Parse MADT IO-APIC entries 1233 */ 1234 mutex_lock(&acpi_ioapic_lock); 1235 error = acpi_parse_madt_ioapic_entries(); 1236 mutex_unlock(&acpi_ioapic_lock); 1237 if (!error) { 1238 acpi_set_irq_model_ioapic(); 1239 1240 smp_found_config = 1; 1241 } 1242 } 1243 if (error == -EINVAL) { 1244 /* 1245 * Dell Precision Workstation 410, 610 come here. 1246 */ 1247 printk(KERN_ERR PREFIX 1248 "Invalid BIOS MADT, disabling ACPI\n"); 1249 disable_acpi(); 1250 } 1251 } else { 1252 /* 1253 * ACPI found no MADT, and so ACPI wants UP PIC mode. 1254 * In the event an MPS table was found, forget it. 1255 * Boot with "acpi=off" to use MPS on such a system. 1256 */ 1257 if (smp_found_config) { 1258 printk(KERN_WARNING PREFIX 1259 "No APIC-table, disabling MPS\n"); 1260 smp_found_config = 0; 1261 } 1262 } 1263 1264 /* 1265 * ACPI supports both logical (e.g. Hyper-Threading) and physical 1266 * processors, where MPS only supports physical. 1267 */ 1268 if (acpi_lapic && acpi_ioapic) 1269 printk(KERN_INFO "Using ACPI (MADT) for SMP configuration " 1270 "information\n"); 1271 else if (acpi_lapic) 1272 printk(KERN_INFO "Using ACPI for processor (LAPIC) " 1273 "configuration information\n"); 1274 #endif 1275 return; 1276 } 1277 1278 static int __init disable_acpi_irq(const struct dmi_system_id *d) 1279 { 1280 if (!acpi_force) { 1281 printk(KERN_NOTICE "%s detected: force use of acpi=noirq\n", 1282 d->ident); 1283 acpi_noirq_set(); 1284 } 1285 return 0; 1286 } 1287 1288 static int __init disable_acpi_pci(const struct dmi_system_id *d) 1289 { 1290 if (!acpi_force) { 1291 printk(KERN_NOTICE "%s detected: force use of pci=noacpi\n", 1292 d->ident); 1293 acpi_disable_pci(); 1294 } 1295 return 0; 1296 } 1297 1298 static int __init dmi_disable_acpi(const struct dmi_system_id *d) 1299 { 1300 if (!acpi_force) { 1301 printk(KERN_NOTICE "%s detected: acpi off\n", d->ident); 1302 disable_acpi(); 1303 } else { 1304 printk(KERN_NOTICE 1305 "Warning: DMI blacklist says broken, but acpi forced\n"); 1306 } 1307 return 0; 1308 } 1309 1310 /* 1311 * Force ignoring BIOS IRQ0 override 1312 */ 1313 static int __init dmi_ignore_irq0_timer_override(const struct dmi_system_id *d) 1314 { 1315 if (!acpi_skip_timer_override) { 1316 pr_notice("%s detected: Ignoring BIOS IRQ0 override\n", 1317 d->ident); 1318 acpi_skip_timer_override = 1; 1319 } 1320 return 0; 1321 } 1322 1323 /* 1324 * ACPI offers an alternative platform interface model that removes 1325 * ACPI hardware requirements for platforms that do not implement 1326 * the PC Architecture. 1327 * 1328 * We initialize the Hardware-reduced ACPI model here: 1329 */ 1330 static void __init acpi_reduced_hw_init(void) 1331 { 1332 if (acpi_gbl_reduced_hardware) { 1333 /* 1334 * Override x86_init functions and bypass legacy pic 1335 * in Hardware-reduced ACPI mode 1336 */ 1337 x86_init.timers.timer_init = x86_init_noop; 1338 x86_init.irqs.pre_vector_init = x86_init_noop; 1339 legacy_pic = &null_legacy_pic; 1340 } 1341 } 1342 1343 /* 1344 * If your system is blacklisted here, but you find that acpi=force 1345 * works for you, please contact linux-acpi@vger.kernel.org 1346 */ 1347 static struct dmi_system_id __initdata acpi_dmi_table[] = { 1348 /* 1349 * Boxes that need ACPI disabled 1350 */ 1351 { 1352 .callback = dmi_disable_acpi, 1353 .ident = "IBM Thinkpad", 1354 .matches = { 1355 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), 1356 DMI_MATCH(DMI_BOARD_NAME, "2629H1G"), 1357 }, 1358 }, 1359 1360 /* 1361 * Boxes that need ACPI PCI IRQ routing disabled 1362 */ 1363 { 1364 .callback = disable_acpi_irq, 1365 .ident = "ASUS A7V", 1366 .matches = { 1367 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC"), 1368 DMI_MATCH(DMI_BOARD_NAME, "<A7V>"), 1369 /* newer BIOS, Revision 1011, does work */ 1370 DMI_MATCH(DMI_BIOS_VERSION, 1371 "ASUS A7V ACPI BIOS Revision 1007"), 1372 }, 1373 }, 1374 { 1375 /* 1376 * Latest BIOS for IBM 600E (1.16) has bad pcinum 1377 * for LPC bridge, which is needed for the PCI 1378 * interrupt links to work. DSDT fix is in bug 5966. 1379 * 2645, 2646 model numbers are shared with 600/600E/600X 1380 */ 1381 .callback = disable_acpi_irq, 1382 .ident = "IBM Thinkpad 600 Series 2645", 1383 .matches = { 1384 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), 1385 DMI_MATCH(DMI_BOARD_NAME, "2645"), 1386 }, 1387 }, 1388 { 1389 .callback = disable_acpi_irq, 1390 .ident = "IBM Thinkpad 600 Series 2646", 1391 .matches = { 1392 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), 1393 DMI_MATCH(DMI_BOARD_NAME, "2646"), 1394 }, 1395 }, 1396 /* 1397 * Boxes that need ACPI PCI IRQ routing and PCI scan disabled 1398 */ 1399 { /* _BBN 0 bug */ 1400 .callback = disable_acpi_pci, 1401 .ident = "ASUS PR-DLS", 1402 .matches = { 1403 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."), 1404 DMI_MATCH(DMI_BOARD_NAME, "PR-DLS"), 1405 DMI_MATCH(DMI_BIOS_VERSION, 1406 "ASUS PR-DLS ACPI BIOS Revision 1010"), 1407 DMI_MATCH(DMI_BIOS_DATE, "03/21/2003") 1408 }, 1409 }, 1410 { 1411 .callback = disable_acpi_pci, 1412 .ident = "Acer TravelMate 36x Laptop", 1413 .matches = { 1414 DMI_MATCH(DMI_SYS_VENDOR, "Acer"), 1415 DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"), 1416 }, 1417 }, 1418 {} 1419 }; 1420 1421 /* second table for DMI checks that should run after early-quirks */ 1422 static struct dmi_system_id __initdata acpi_dmi_table_late[] = { 1423 /* 1424 * HP laptops which use a DSDT reporting as HP/SB400/10000, 1425 * which includes some code which overrides all temperature 1426 * trip points to 16C if the INTIN2 input of the I/O APIC 1427 * is enabled. This input is incorrectly designated the 1428 * ISA IRQ 0 via an interrupt source override even though 1429 * it is wired to the output of the master 8259A and INTIN0 1430 * is not connected at all. Force ignoring BIOS IRQ0 1431 * override in that cases. 1432 */ 1433 { 1434 .callback = dmi_ignore_irq0_timer_override, 1435 .ident = "HP nx6115 laptop", 1436 .matches = { 1437 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 1438 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6115"), 1439 }, 1440 }, 1441 { 1442 .callback = dmi_ignore_irq0_timer_override, 1443 .ident = "HP NX6125 laptop", 1444 .matches = { 1445 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 1446 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6125"), 1447 }, 1448 }, 1449 { 1450 .callback = dmi_ignore_irq0_timer_override, 1451 .ident = "HP NX6325 laptop", 1452 .matches = { 1453 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 1454 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6325"), 1455 }, 1456 }, 1457 { 1458 .callback = dmi_ignore_irq0_timer_override, 1459 .ident = "HP 6715b laptop", 1460 .matches = { 1461 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 1462 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq 6715b"), 1463 }, 1464 }, 1465 { 1466 .callback = dmi_ignore_irq0_timer_override, 1467 .ident = "FUJITSU SIEMENS", 1468 .matches = { 1469 DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"), 1470 DMI_MATCH(DMI_PRODUCT_NAME, "AMILO PRO V2030"), 1471 }, 1472 }, 1473 {} 1474 }; 1475 1476 /* 1477 * acpi_boot_table_init() and acpi_boot_init() 1478 * called from setup_arch(), always. 1479 * 1. checksums all tables 1480 * 2. enumerates lapics 1481 * 3. enumerates io-apics 1482 * 1483 * acpi_table_init() is separate to allow reading SRAT without 1484 * other side effects. 1485 * 1486 * side effects of acpi_boot_init: 1487 * acpi_lapic = 1 if LAPIC found 1488 * acpi_ioapic = 1 if IOAPIC found 1489 * if (acpi_lapic && acpi_ioapic) smp_found_config = 1; 1490 * if acpi_blacklisted() acpi_disabled = 1; 1491 * acpi_irq_model=... 1492 * ... 1493 */ 1494 1495 void __init acpi_boot_table_init(void) 1496 { 1497 dmi_check_system(acpi_dmi_table); 1498 1499 /* 1500 * If acpi_disabled, bail out 1501 */ 1502 if (acpi_disabled) 1503 return; 1504 1505 /* 1506 * Initialize the ACPI boot-time table parser. 1507 */ 1508 if (acpi_table_init()) { 1509 disable_acpi(); 1510 return; 1511 } 1512 1513 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf); 1514 1515 /* 1516 * blacklist may disable ACPI entirely 1517 */ 1518 if (acpi_blacklisted()) { 1519 if (acpi_force) { 1520 printk(KERN_WARNING PREFIX "acpi=force override\n"); 1521 } else { 1522 printk(KERN_WARNING PREFIX "Disabling ACPI support\n"); 1523 disable_acpi(); 1524 return; 1525 } 1526 } 1527 } 1528 1529 int __init early_acpi_boot_init(void) 1530 { 1531 /* 1532 * If acpi_disabled, bail out 1533 */ 1534 if (acpi_disabled) 1535 return 1; 1536 1537 /* 1538 * Process the Multiple APIC Description Table (MADT), if present 1539 */ 1540 early_acpi_process_madt(); 1541 1542 /* 1543 * Hardware-reduced ACPI mode initialization: 1544 */ 1545 acpi_reduced_hw_init(); 1546 1547 return 0; 1548 } 1549 1550 int __init acpi_boot_init(void) 1551 { 1552 /* those are executed after early-quirks are executed */ 1553 dmi_check_system(acpi_dmi_table_late); 1554 1555 /* 1556 * If acpi_disabled, bail out 1557 */ 1558 if (acpi_disabled) 1559 return 1; 1560 1561 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf); 1562 1563 /* 1564 * set sci_int and PM timer address 1565 */ 1566 acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt); 1567 1568 /* 1569 * Process the Multiple APIC Description Table (MADT), if present 1570 */ 1571 acpi_process_madt(); 1572 1573 acpi_table_parse(ACPI_SIG_HPET, acpi_parse_hpet); 1574 1575 if (!acpi_noirq) 1576 x86_init.pci.init = pci_acpi_init; 1577 1578 return 0; 1579 } 1580 1581 static int __init parse_acpi(char *arg) 1582 { 1583 if (!arg) 1584 return -EINVAL; 1585 1586 /* "acpi=off" disables both ACPI table parsing and interpreter */ 1587 if (strcmp(arg, "off") == 0) { 1588 disable_acpi(); 1589 } 1590 /* acpi=force to over-ride black-list */ 1591 else if (strcmp(arg, "force") == 0) { 1592 acpi_force = 1; 1593 acpi_disabled = 0; 1594 } 1595 /* acpi=strict disables out-of-spec workarounds */ 1596 else if (strcmp(arg, "strict") == 0) { 1597 acpi_strict = 1; 1598 } 1599 /* acpi=rsdt use RSDT instead of XSDT */ 1600 else if (strcmp(arg, "rsdt") == 0) { 1601 acpi_gbl_do_not_use_xsdt = TRUE; 1602 } 1603 /* "acpi=noirq" disables ACPI interrupt routing */ 1604 else if (strcmp(arg, "noirq") == 0) { 1605 acpi_noirq_set(); 1606 } 1607 /* "acpi=copy_dsdt" copys DSDT */ 1608 else if (strcmp(arg, "copy_dsdt") == 0) { 1609 acpi_gbl_copy_dsdt_locally = 1; 1610 } 1611 /* "acpi=nocmcff" disables FF mode for corrected errors */ 1612 else if (strcmp(arg, "nocmcff") == 0) { 1613 acpi_disable_cmcff = 1; 1614 } else { 1615 /* Core will printk when we return error. */ 1616 return -EINVAL; 1617 } 1618 return 0; 1619 } 1620 early_param("acpi", parse_acpi); 1621 1622 /* FIXME: Using pci= for an ACPI parameter is a travesty. */ 1623 static int __init parse_pci(char *arg) 1624 { 1625 if (arg && strcmp(arg, "noacpi") == 0) 1626 acpi_disable_pci(); 1627 return 0; 1628 } 1629 early_param("pci", parse_pci); 1630 1631 int __init acpi_mps_check(void) 1632 { 1633 #if defined(CONFIG_X86_LOCAL_APIC) && !defined(CONFIG_X86_MPPARSE) 1634 /* mptable code is not built-in*/ 1635 if (acpi_disabled || acpi_noirq) { 1636 printk(KERN_WARNING "MPS support code is not built-in.\n" 1637 "Using acpi=off or acpi=noirq or pci=noacpi " 1638 "may have problem\n"); 1639 return 1; 1640 } 1641 #endif 1642 return 0; 1643 } 1644 1645 #ifdef CONFIG_X86_IO_APIC 1646 static int __init parse_acpi_skip_timer_override(char *arg) 1647 { 1648 acpi_skip_timer_override = 1; 1649 return 0; 1650 } 1651 early_param("acpi_skip_timer_override", parse_acpi_skip_timer_override); 1652 1653 static int __init parse_acpi_use_timer_override(char *arg) 1654 { 1655 acpi_use_timer_override = 1; 1656 return 0; 1657 } 1658 early_param("acpi_use_timer_override", parse_acpi_use_timer_override); 1659 #endif /* CONFIG_X86_IO_APIC */ 1660 1661 static int __init setup_acpi_sci(char *s) 1662 { 1663 if (!s) 1664 return -EINVAL; 1665 if (!strcmp(s, "edge")) 1666 acpi_sci_flags = ACPI_MADT_TRIGGER_EDGE | 1667 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK); 1668 else if (!strcmp(s, "level")) 1669 acpi_sci_flags = ACPI_MADT_TRIGGER_LEVEL | 1670 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK); 1671 else if (!strcmp(s, "high")) 1672 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_HIGH | 1673 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK); 1674 else if (!strcmp(s, "low")) 1675 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_LOW | 1676 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK); 1677 else 1678 return -EINVAL; 1679 return 0; 1680 } 1681 early_param("acpi_sci", setup_acpi_sci); 1682 1683 int __acpi_acquire_global_lock(unsigned int *lock) 1684 { 1685 unsigned int old, new, val; 1686 do { 1687 old = *lock; 1688 new = (((old & ~0x3) + 2) + ((old >> 1) & 0x1)); 1689 val = cmpxchg(lock, old, new); 1690 } while (unlikely (val != old)); 1691 return (new < 3) ? -1 : 0; 1692 } 1693 1694 int __acpi_release_global_lock(unsigned int *lock) 1695 { 1696 unsigned int old, new, val; 1697 do { 1698 old = *lock; 1699 new = old & ~0x3; 1700 val = cmpxchg(lock, old, new); 1701 } while (unlikely (val != old)); 1702 return old & 0x1; 1703 } 1704 1705 void __init arch_reserve_mem_area(acpi_physical_address addr, size_t size) 1706 { 1707 e820_add_region(addr, size, E820_ACPI); 1708 update_e820(); 1709 } 1710