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 (!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 * @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); 448 449 /* 450 * stash over-ride to indicate we've been here 451 * and for later update of acpi_gbl_FADT 452 */ 453 acpi_sci_override_gsi = gsi; 454 return; 455 } 456 457 static int __init 458 acpi_parse_int_src_ovr(struct acpi_subtable_header * header, 459 const unsigned long end) 460 { 461 struct acpi_madt_interrupt_override *intsrc = NULL; 462 463 intsrc = (struct acpi_madt_interrupt_override *)header; 464 465 if (BAD_MADT_ENTRY(intsrc, end)) 466 return -EINVAL; 467 468 acpi_table_print_madt_entry(header); 469 470 if (intsrc->source_irq == acpi_gbl_FADT.sci_interrupt) { 471 acpi_sci_ioapic_setup(intsrc->source_irq, 472 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK, 473 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2, 474 intsrc->global_irq); 475 return 0; 476 } 477 478 if (intsrc->source_irq == 0) { 479 if (acpi_skip_timer_override) { 480 printk(PREFIX "BIOS IRQ0 override ignored.\n"); 481 return 0; 482 } 483 484 if ((intsrc->global_irq == 2) && acpi_fix_pin2_polarity 485 && (intsrc->inti_flags & ACPI_MADT_POLARITY_MASK)) { 486 intsrc->inti_flags &= ~ACPI_MADT_POLARITY_MASK; 487 printk(PREFIX "BIOS IRQ0 pin2 override: forcing polarity to high active.\n"); 488 } 489 } 490 491 mp_override_legacy_irq(intsrc->source_irq, 492 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK, 493 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2, 494 intsrc->global_irq); 495 496 return 0; 497 } 498 499 static int __init 500 acpi_parse_nmi_src(struct acpi_subtable_header * header, const unsigned long end) 501 { 502 struct acpi_madt_nmi_source *nmi_src = NULL; 503 504 nmi_src = (struct acpi_madt_nmi_source *)header; 505 506 if (BAD_MADT_ENTRY(nmi_src, end)) 507 return -EINVAL; 508 509 acpi_table_print_madt_entry(header); 510 511 /* TBD: Support nimsrc entries? */ 512 513 return 0; 514 } 515 516 #endif /* CONFIG_X86_IO_APIC */ 517 518 /* 519 * acpi_pic_sci_set_trigger() 520 * 521 * use ELCR to set PIC-mode trigger type for SCI 522 * 523 * If a PIC-mode SCI is not recognized or gives spurious IRQ7's 524 * it may require Edge Trigger -- use "acpi_sci=edge" 525 * 526 * Port 0x4d0-4d1 are ECLR1 and ECLR2, the Edge/Level Control Registers 527 * for the 8259 PIC. bit[n] = 1 means irq[n] is Level, otherwise Edge. 528 * ECLR1 is IRQs 0-7 (IRQ 0, 1, 2 must be 0) 529 * ECLR2 is IRQs 8-15 (IRQ 8, 13 must be 0) 530 */ 531 532 void __init acpi_pic_sci_set_trigger(unsigned int irq, u16 trigger) 533 { 534 unsigned int mask = 1 << irq; 535 unsigned int old, new; 536 537 /* Real old ELCR mask */ 538 old = inb(0x4d0) | (inb(0x4d1) << 8); 539 540 /* 541 * If we use ACPI to set PCI IRQs, then we should clear ELCR 542 * since we will set it correctly as we enable the PCI irq 543 * routing. 544 */ 545 new = acpi_noirq ? old : 0; 546 547 /* 548 * Update SCI information in the ELCR, it isn't in the PCI 549 * routing tables.. 550 */ 551 switch (trigger) { 552 case 1: /* Edge - clear */ 553 new &= ~mask; 554 break; 555 case 3: /* Level - set */ 556 new |= mask; 557 break; 558 } 559 560 if (old == new) 561 return; 562 563 printk(PREFIX "setting ELCR to %04x (from %04x)\n", new, old); 564 outb(new, 0x4d0); 565 outb(new >> 8, 0x4d1); 566 } 567 568 int acpi_gsi_to_irq(u32 gsi, unsigned int *irqp) 569 { 570 int rc, irq, trigger, polarity; 571 572 if (acpi_irq_model == ACPI_IRQ_MODEL_PIC) { 573 *irqp = gsi; 574 return 0; 575 } 576 577 rc = acpi_get_override_irq(gsi, &trigger, &polarity); 578 if (rc == 0) { 579 trigger = trigger ? ACPI_LEVEL_SENSITIVE : ACPI_EDGE_SENSITIVE; 580 polarity = polarity ? ACPI_ACTIVE_LOW : ACPI_ACTIVE_HIGH; 581 irq = acpi_register_gsi(NULL, gsi, trigger, polarity); 582 if (irq >= 0) { 583 *irqp = irq; 584 return 0; 585 } 586 } 587 588 return -1; 589 } 590 EXPORT_SYMBOL_GPL(acpi_gsi_to_irq); 591 592 int acpi_isa_irq_to_gsi(unsigned isa_irq, u32 *gsi) 593 { 594 if (isa_irq < nr_legacy_irqs() && 595 isa_irq_to_gsi[isa_irq] != ACPI_INVALID_GSI) { 596 *gsi = isa_irq_to_gsi[isa_irq]; 597 return 0; 598 } 599 600 return -1; 601 } 602 603 static int acpi_register_gsi_pic(struct device *dev, u32 gsi, 604 int trigger, int polarity) 605 { 606 #ifdef CONFIG_PCI 607 /* 608 * Make sure all (legacy) PCI IRQs are set as level-triggered. 609 */ 610 if (trigger == ACPI_LEVEL_SENSITIVE) 611 elcr_set_level_irq(gsi); 612 #endif 613 614 return gsi; 615 } 616 617 #ifdef CONFIG_X86_LOCAL_APIC 618 static int acpi_register_gsi_ioapic(struct device *dev, u32 gsi, 619 int trigger, int polarity) 620 { 621 int irq = gsi; 622 #ifdef CONFIG_X86_IO_APIC 623 int node; 624 struct irq_alloc_info info; 625 626 node = dev ? dev_to_node(dev) : NUMA_NO_NODE; 627 trigger = trigger == ACPI_EDGE_SENSITIVE ? 0 : 1; 628 polarity = polarity == ACPI_ACTIVE_HIGH ? 0 : 1; 629 ioapic_set_alloc_attr(&info, node, trigger, polarity); 630 631 mutex_lock(&acpi_ioapic_lock); 632 irq = mp_map_gsi_to_irq(gsi, IOAPIC_MAP_ALLOC, &info); 633 /* Don't set up the ACPI SCI because it's already set up */ 634 if (irq >= 0 && enable_update_mptable && 635 acpi_gbl_FADT.sci_interrupt != gsi) 636 mp_config_acpi_gsi(dev, gsi, trigger, polarity); 637 mutex_unlock(&acpi_ioapic_lock); 638 #endif 639 640 return irq; 641 } 642 643 static void acpi_unregister_gsi_ioapic(u32 gsi) 644 { 645 #ifdef CONFIG_X86_IO_APIC 646 int irq; 647 648 mutex_lock(&acpi_ioapic_lock); 649 irq = mp_map_gsi_to_irq(gsi, 0, NULL); 650 if (irq > 0) 651 mp_unmap_irq(irq); 652 mutex_unlock(&acpi_ioapic_lock); 653 #endif 654 } 655 #endif 656 657 int (*__acpi_register_gsi)(struct device *dev, u32 gsi, 658 int trigger, int polarity) = acpi_register_gsi_pic; 659 void (*__acpi_unregister_gsi)(u32 gsi) = NULL; 660 661 #ifdef CONFIG_ACPI_SLEEP 662 int (*acpi_suspend_lowlevel)(void) = x86_acpi_suspend_lowlevel; 663 #else 664 int (*acpi_suspend_lowlevel)(void); 665 #endif 666 667 /* 668 * success: return IRQ number (>=0) 669 * failure: return < 0 670 */ 671 int acpi_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity) 672 { 673 return __acpi_register_gsi(dev, gsi, trigger, polarity); 674 } 675 EXPORT_SYMBOL_GPL(acpi_register_gsi); 676 677 void acpi_unregister_gsi(u32 gsi) 678 { 679 if (__acpi_unregister_gsi) 680 __acpi_unregister_gsi(gsi); 681 } 682 EXPORT_SYMBOL_GPL(acpi_unregister_gsi); 683 684 #ifdef CONFIG_X86_LOCAL_APIC 685 static void __init acpi_set_irq_model_ioapic(void) 686 { 687 acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC; 688 __acpi_register_gsi = acpi_register_gsi_ioapic; 689 __acpi_unregister_gsi = acpi_unregister_gsi_ioapic; 690 acpi_ioapic = 1; 691 } 692 #endif 693 694 /* 695 * ACPI based hotplug support for CPU 696 */ 697 #ifdef CONFIG_ACPI_HOTPLUG_CPU 698 #include <acpi/processor.h> 699 700 static void acpi_map_cpu2node(acpi_handle handle, int cpu, int physid) 701 { 702 #ifdef CONFIG_ACPI_NUMA 703 int nid; 704 705 nid = acpi_get_node(handle); 706 if (nid != -1) { 707 set_apicid_to_node(physid, nid); 708 numa_set_node(cpu, nid); 709 } 710 #endif 711 } 712 713 int acpi_map_cpu(acpi_handle handle, phys_cpuid_t physid, int *pcpu) 714 { 715 int cpu; 716 717 cpu = acpi_register_lapic(physid, ACPI_MADT_ENABLED); 718 if (cpu < 0) { 719 pr_info(PREFIX "Unable to map lapic to logical cpu number\n"); 720 return cpu; 721 } 722 723 acpi_processor_set_pdc(handle); 724 acpi_map_cpu2node(handle, cpu, physid); 725 726 *pcpu = cpu; 727 return 0; 728 } 729 EXPORT_SYMBOL(acpi_map_cpu); 730 731 int acpi_unmap_cpu(int cpu) 732 { 733 #ifdef CONFIG_ACPI_NUMA 734 set_apicid_to_node(per_cpu(x86_cpu_to_apicid, cpu), NUMA_NO_NODE); 735 #endif 736 737 per_cpu(x86_cpu_to_apicid, cpu) = -1; 738 set_cpu_present(cpu, false); 739 num_processors--; 740 741 return (0); 742 } 743 EXPORT_SYMBOL(acpi_unmap_cpu); 744 #endif /* CONFIG_ACPI_HOTPLUG_CPU */ 745 746 int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base) 747 { 748 int ret = -ENOSYS; 749 #ifdef CONFIG_ACPI_HOTPLUG_IOAPIC 750 int ioapic_id; 751 u64 addr; 752 struct ioapic_domain_cfg cfg = { 753 .type = IOAPIC_DOMAIN_DYNAMIC, 754 .ops = &mp_ioapic_irqdomain_ops, 755 }; 756 757 ioapic_id = acpi_get_ioapic_id(handle, gsi_base, &addr); 758 if (ioapic_id < 0) { 759 unsigned long long uid; 760 acpi_status status; 761 762 status = acpi_evaluate_integer(handle, METHOD_NAME__UID, 763 NULL, &uid); 764 if (ACPI_FAILURE(status)) { 765 acpi_handle_warn(handle, "failed to get IOAPIC ID.\n"); 766 return -EINVAL; 767 } 768 ioapic_id = (int)uid; 769 } 770 771 mutex_lock(&acpi_ioapic_lock); 772 ret = mp_register_ioapic(ioapic_id, phys_addr, gsi_base, &cfg); 773 mutex_unlock(&acpi_ioapic_lock); 774 #endif 775 776 return ret; 777 } 778 EXPORT_SYMBOL(acpi_register_ioapic); 779 780 int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base) 781 { 782 int ret = -ENOSYS; 783 784 #ifdef CONFIG_ACPI_HOTPLUG_IOAPIC 785 mutex_lock(&acpi_ioapic_lock); 786 ret = mp_unregister_ioapic(gsi_base); 787 mutex_unlock(&acpi_ioapic_lock); 788 #endif 789 790 return ret; 791 } 792 EXPORT_SYMBOL(acpi_unregister_ioapic); 793 794 /** 795 * acpi_ioapic_registered - Check whether IOAPIC assoicatied with @gsi_base 796 * has been registered 797 * @handle: ACPI handle of the IOAPIC deivce 798 * @gsi_base: GSI base associated with the IOAPIC 799 * 800 * Assume caller holds some type of lock to serialize acpi_ioapic_registered() 801 * with acpi_register_ioapic()/acpi_unregister_ioapic(). 802 */ 803 int acpi_ioapic_registered(acpi_handle handle, u32 gsi_base) 804 { 805 int ret = 0; 806 807 #ifdef CONFIG_ACPI_HOTPLUG_IOAPIC 808 mutex_lock(&acpi_ioapic_lock); 809 ret = mp_ioapic_registered(gsi_base); 810 mutex_unlock(&acpi_ioapic_lock); 811 #endif 812 813 return ret; 814 } 815 816 static int __init acpi_parse_sbf(struct acpi_table_header *table) 817 { 818 struct acpi_table_boot *sb = (struct acpi_table_boot *)table; 819 820 sbf_port = sb->cmos_index; /* Save CMOS port */ 821 822 return 0; 823 } 824 825 #ifdef CONFIG_HPET_TIMER 826 #include <asm/hpet.h> 827 828 static struct resource *hpet_res __initdata; 829 830 static int __init acpi_parse_hpet(struct acpi_table_header *table) 831 { 832 struct acpi_table_hpet *hpet_tbl = (struct acpi_table_hpet *)table; 833 834 if (hpet_tbl->address.space_id != ACPI_SPACE_MEM) { 835 printk(KERN_WARNING PREFIX "HPET timers must be located in " 836 "memory.\n"); 837 return -1; 838 } 839 840 hpet_address = hpet_tbl->address.address; 841 hpet_blockid = hpet_tbl->sequence; 842 843 /* 844 * Some broken BIOSes advertise HPET at 0x0. We really do not 845 * want to allocate a resource there. 846 */ 847 if (!hpet_address) { 848 printk(KERN_WARNING PREFIX 849 "HPET id: %#x base: %#lx is invalid\n", 850 hpet_tbl->id, hpet_address); 851 return 0; 852 } 853 #ifdef CONFIG_X86_64 854 /* 855 * Some even more broken BIOSes advertise HPET at 856 * 0xfed0000000000000 instead of 0xfed00000. Fix it up and add 857 * some noise: 858 */ 859 if (hpet_address == 0xfed0000000000000UL) { 860 if (!hpet_force_user) { 861 printk(KERN_WARNING PREFIX "HPET id: %#x " 862 "base: 0xfed0000000000000 is bogus\n " 863 "try hpet=force on the kernel command line to " 864 "fix it up to 0xfed00000.\n", hpet_tbl->id); 865 hpet_address = 0; 866 return 0; 867 } 868 printk(KERN_WARNING PREFIX 869 "HPET id: %#x base: 0xfed0000000000000 fixed up " 870 "to 0xfed00000.\n", hpet_tbl->id); 871 hpet_address >>= 32; 872 } 873 #endif 874 printk(KERN_INFO PREFIX "HPET id: %#x base: %#lx\n", 875 hpet_tbl->id, hpet_address); 876 877 /* 878 * Allocate and initialize the HPET firmware resource for adding into 879 * the resource tree during the lateinit timeframe. 880 */ 881 #define HPET_RESOURCE_NAME_SIZE 9 882 hpet_res = alloc_bootmem(sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE); 883 884 hpet_res->name = (void *)&hpet_res[1]; 885 hpet_res->flags = IORESOURCE_MEM; 886 snprintf((char *)hpet_res->name, HPET_RESOURCE_NAME_SIZE, "HPET %u", 887 hpet_tbl->sequence); 888 889 hpet_res->start = hpet_address; 890 hpet_res->end = hpet_address + (1 * 1024) - 1; 891 892 return 0; 893 } 894 895 /* 896 * hpet_insert_resource inserts the HPET resources used into the resource 897 * tree. 898 */ 899 static __init int hpet_insert_resource(void) 900 { 901 if (!hpet_res) 902 return 1; 903 904 return insert_resource(&iomem_resource, hpet_res); 905 } 906 907 late_initcall(hpet_insert_resource); 908 909 #else 910 #define acpi_parse_hpet NULL 911 #endif 912 913 static int __init acpi_parse_fadt(struct acpi_table_header *table) 914 { 915 if (!(acpi_gbl_FADT.boot_flags & ACPI_FADT_LEGACY_DEVICES)) { 916 pr_debug("ACPI: no legacy devices present\n"); 917 x86_platform.legacy.devices.pnpbios = 0; 918 } 919 920 if (acpi_gbl_FADT.boot_flags & ACPI_FADT_NO_CMOS_RTC) { 921 pr_debug("ACPI: not registering RTC platform device\n"); 922 x86_platform.legacy.rtc = 0; 923 } 924 925 #ifdef CONFIG_X86_PM_TIMER 926 /* detect the location of the ACPI PM Timer */ 927 if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID) { 928 /* FADT rev. 2 */ 929 if (acpi_gbl_FADT.xpm_timer_block.space_id != 930 ACPI_ADR_SPACE_SYSTEM_IO) 931 return 0; 932 933 pmtmr_ioport = acpi_gbl_FADT.xpm_timer_block.address; 934 /* 935 * "X" fields are optional extensions to the original V1.0 936 * fields, so we must selectively expand V1.0 fields if the 937 * corresponding X field is zero. 938 */ 939 if (!pmtmr_ioport) 940 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block; 941 } else { 942 /* FADT rev. 1 */ 943 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block; 944 } 945 if (pmtmr_ioport) 946 printk(KERN_INFO PREFIX "PM-Timer IO Port: %#x\n", 947 pmtmr_ioport); 948 #endif 949 return 0; 950 } 951 952 #ifdef CONFIG_X86_LOCAL_APIC 953 /* 954 * Parse LAPIC entries in MADT 955 * returns 0 on success, < 0 on error 956 */ 957 958 static int __init early_acpi_parse_madt_lapic_addr_ovr(void) 959 { 960 int count; 961 962 if (!boot_cpu_has(X86_FEATURE_APIC)) 963 return -ENODEV; 964 965 /* 966 * Note that the LAPIC address is obtained from the MADT (32-bit value) 967 * and (optionally) overridden by a LAPIC_ADDR_OVR entry (64-bit value). 968 */ 969 970 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE, 971 acpi_parse_lapic_addr_ovr, 0); 972 if (count < 0) { 973 printk(KERN_ERR PREFIX 974 "Error parsing LAPIC address override entry\n"); 975 return count; 976 } 977 978 register_lapic_address(acpi_lapic_addr); 979 980 return count; 981 } 982 983 static int __init acpi_parse_madt_lapic_entries(void) 984 { 985 int count; 986 int x2count = 0; 987 int ret; 988 struct acpi_subtable_proc madt_proc[2]; 989 990 if (!boot_cpu_has(X86_FEATURE_APIC)) 991 return -ENODEV; 992 993 /* 994 * Note that the LAPIC address is obtained from the MADT (32-bit value) 995 * and (optionally) overridden by a LAPIC_ADDR_OVR entry (64-bit value). 996 */ 997 998 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE, 999 acpi_parse_lapic_addr_ovr, 0); 1000 if (count < 0) { 1001 printk(KERN_ERR PREFIX 1002 "Error parsing LAPIC address override entry\n"); 1003 return count; 1004 } 1005 1006 register_lapic_address(acpi_lapic_addr); 1007 1008 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC, 1009 acpi_parse_sapic, MAX_LOCAL_APIC); 1010 1011 if (!count) { 1012 memset(madt_proc, 0, sizeof(madt_proc)); 1013 madt_proc[0].id = ACPI_MADT_TYPE_LOCAL_APIC; 1014 madt_proc[0].handler = acpi_parse_lapic; 1015 madt_proc[1].id = ACPI_MADT_TYPE_LOCAL_X2APIC; 1016 madt_proc[1].handler = acpi_parse_x2apic; 1017 ret = acpi_table_parse_entries_array(ACPI_SIG_MADT, 1018 sizeof(struct acpi_table_madt), 1019 madt_proc, ARRAY_SIZE(madt_proc), MAX_LOCAL_APIC); 1020 if (ret < 0) { 1021 printk(KERN_ERR PREFIX 1022 "Error parsing LAPIC/X2APIC entries\n"); 1023 return ret; 1024 } 1025 1026 x2count = madt_proc[0].count; 1027 count = madt_proc[1].count; 1028 } 1029 if (!count && !x2count) { 1030 printk(KERN_ERR PREFIX "No LAPIC entries present\n"); 1031 /* TBD: Cleanup to allow fallback to MPS */ 1032 return -ENODEV; 1033 } else if (count < 0 || x2count < 0) { 1034 printk(KERN_ERR PREFIX "Error parsing LAPIC entry\n"); 1035 /* TBD: Cleanup to allow fallback to MPS */ 1036 return count; 1037 } 1038 1039 x2count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC_NMI, 1040 acpi_parse_x2apic_nmi, 0); 1041 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI, 1042 acpi_parse_lapic_nmi, 0); 1043 if (count < 0 || x2count < 0) { 1044 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n"); 1045 /* TBD: Cleanup to allow fallback to MPS */ 1046 return count; 1047 } 1048 return 0; 1049 } 1050 #endif /* CONFIG_X86_LOCAL_APIC */ 1051 1052 #ifdef CONFIG_X86_IO_APIC 1053 static void __init mp_config_acpi_legacy_irqs(void) 1054 { 1055 int i; 1056 struct mpc_intsrc mp_irq; 1057 1058 #ifdef CONFIG_EISA 1059 /* 1060 * Fabricate the legacy ISA bus (bus #31). 1061 */ 1062 mp_bus_id_to_type[MP_ISA_BUS] = MP_BUS_ISA; 1063 #endif 1064 set_bit(MP_ISA_BUS, mp_bus_not_pci); 1065 pr_debug("Bus #%d is ISA\n", MP_ISA_BUS); 1066 1067 /* 1068 * Use the default configuration for the IRQs 0-15. Unless 1069 * overridden by (MADT) interrupt source override entries. 1070 */ 1071 for (i = 0; i < nr_legacy_irqs(); i++) { 1072 int ioapic, pin; 1073 unsigned int dstapic; 1074 int idx; 1075 u32 gsi; 1076 1077 /* Locate the gsi that irq i maps to. */ 1078 if (acpi_isa_irq_to_gsi(i, &gsi)) 1079 continue; 1080 1081 /* 1082 * Locate the IOAPIC that manages the ISA IRQ. 1083 */ 1084 ioapic = mp_find_ioapic(gsi); 1085 if (ioapic < 0) 1086 continue; 1087 pin = mp_find_ioapic_pin(ioapic, gsi); 1088 dstapic = mpc_ioapic_id(ioapic); 1089 1090 for (idx = 0; idx < mp_irq_entries; idx++) { 1091 struct mpc_intsrc *irq = mp_irqs + idx; 1092 1093 /* Do we already have a mapping for this ISA IRQ? */ 1094 if (irq->srcbus == MP_ISA_BUS && irq->srcbusirq == i) 1095 break; 1096 1097 /* Do we already have a mapping for this IOAPIC pin */ 1098 if (irq->dstapic == dstapic && irq->dstirq == pin) 1099 break; 1100 } 1101 1102 if (idx != mp_irq_entries) { 1103 printk(KERN_DEBUG "ACPI: IRQ%d used by override.\n", i); 1104 continue; /* IRQ already used */ 1105 } 1106 1107 mp_irq.type = MP_INTSRC; 1108 mp_irq.irqflag = 0; /* Conforming */ 1109 mp_irq.srcbus = MP_ISA_BUS; 1110 mp_irq.dstapic = dstapic; 1111 mp_irq.irqtype = mp_INT; 1112 mp_irq.srcbusirq = i; /* Identity mapped */ 1113 mp_irq.dstirq = pin; 1114 1115 mp_save_irq(&mp_irq); 1116 } 1117 } 1118 1119 /* 1120 * Parse IOAPIC related entries in MADT 1121 * returns 0 on success, < 0 on error 1122 */ 1123 static int __init acpi_parse_madt_ioapic_entries(void) 1124 { 1125 int count; 1126 1127 /* 1128 * ACPI interpreter is required to complete interrupt setup, 1129 * so if it is off, don't enumerate the io-apics with ACPI. 1130 * If MPS is present, it will handle them, 1131 * otherwise the system will stay in PIC mode 1132 */ 1133 if (acpi_disabled || acpi_noirq) 1134 return -ENODEV; 1135 1136 if (!boot_cpu_has(X86_FEATURE_APIC)) 1137 return -ENODEV; 1138 1139 /* 1140 * if "noapic" boot option, don't look for IO-APICs 1141 */ 1142 if (skip_ioapic_setup) { 1143 printk(KERN_INFO PREFIX "Skipping IOAPIC probe " 1144 "due to 'noapic' option.\n"); 1145 return -ENODEV; 1146 } 1147 1148 count = acpi_table_parse_madt(ACPI_MADT_TYPE_IO_APIC, acpi_parse_ioapic, 1149 MAX_IO_APICS); 1150 if (!count) { 1151 printk(KERN_ERR PREFIX "No IOAPIC entries present\n"); 1152 return -ENODEV; 1153 } else if (count < 0) { 1154 printk(KERN_ERR PREFIX "Error parsing IOAPIC entry\n"); 1155 return count; 1156 } 1157 1158 count = acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE, 1159 acpi_parse_int_src_ovr, nr_irqs); 1160 if (count < 0) { 1161 printk(KERN_ERR PREFIX 1162 "Error parsing interrupt source overrides entry\n"); 1163 /* TBD: Cleanup to allow fallback to MPS */ 1164 return count; 1165 } 1166 1167 /* 1168 * If BIOS did not supply an INT_SRC_OVR for the SCI 1169 * pretend we got one so we can set the SCI flags. 1170 */ 1171 if (!acpi_sci_override_gsi) 1172 acpi_sci_ioapic_setup(acpi_gbl_FADT.sci_interrupt, 0, 0, 1173 acpi_gbl_FADT.sci_interrupt); 1174 1175 /* Fill in identity legacy mappings where no override */ 1176 mp_config_acpi_legacy_irqs(); 1177 1178 count = acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE, 1179 acpi_parse_nmi_src, nr_irqs); 1180 if (count < 0) { 1181 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n"); 1182 /* TBD: Cleanup to allow fallback to MPS */ 1183 return count; 1184 } 1185 1186 return 0; 1187 } 1188 #else 1189 static inline int acpi_parse_madt_ioapic_entries(void) 1190 { 1191 return -1; 1192 } 1193 #endif /* !CONFIG_X86_IO_APIC */ 1194 1195 static void __init early_acpi_process_madt(void) 1196 { 1197 #ifdef CONFIG_X86_LOCAL_APIC 1198 int error; 1199 1200 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) { 1201 1202 /* 1203 * Parse MADT LAPIC entries 1204 */ 1205 error = early_acpi_parse_madt_lapic_addr_ovr(); 1206 if (!error) { 1207 acpi_lapic = 1; 1208 smp_found_config = 1; 1209 } 1210 if (error == -EINVAL) { 1211 /* 1212 * Dell Precision Workstation 410, 610 come here. 1213 */ 1214 printk(KERN_ERR PREFIX 1215 "Invalid BIOS MADT, disabling ACPI\n"); 1216 disable_acpi(); 1217 } 1218 } 1219 #endif 1220 } 1221 1222 static void __init acpi_process_madt(void) 1223 { 1224 #ifdef CONFIG_X86_LOCAL_APIC 1225 int error; 1226 1227 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) { 1228 1229 /* 1230 * Parse MADT LAPIC entries 1231 */ 1232 error = acpi_parse_madt_lapic_entries(); 1233 if (!error) { 1234 acpi_lapic = 1; 1235 1236 /* 1237 * Parse MADT IO-APIC entries 1238 */ 1239 mutex_lock(&acpi_ioapic_lock); 1240 error = acpi_parse_madt_ioapic_entries(); 1241 mutex_unlock(&acpi_ioapic_lock); 1242 if (!error) { 1243 acpi_set_irq_model_ioapic(); 1244 1245 smp_found_config = 1; 1246 } 1247 } 1248 if (error == -EINVAL) { 1249 /* 1250 * Dell Precision Workstation 410, 610 come here. 1251 */ 1252 printk(KERN_ERR PREFIX 1253 "Invalid BIOS MADT, disabling ACPI\n"); 1254 disable_acpi(); 1255 } 1256 } else { 1257 /* 1258 * ACPI found no MADT, and so ACPI wants UP PIC mode. 1259 * In the event an MPS table was found, forget it. 1260 * Boot with "acpi=off" to use MPS on such a system. 1261 */ 1262 if (smp_found_config) { 1263 printk(KERN_WARNING PREFIX 1264 "No APIC-table, disabling MPS\n"); 1265 smp_found_config = 0; 1266 } 1267 } 1268 1269 /* 1270 * ACPI supports both logical (e.g. Hyper-Threading) and physical 1271 * processors, where MPS only supports physical. 1272 */ 1273 if (acpi_lapic && acpi_ioapic) 1274 printk(KERN_INFO "Using ACPI (MADT) for SMP configuration " 1275 "information\n"); 1276 else if (acpi_lapic) 1277 printk(KERN_INFO "Using ACPI for processor (LAPIC) " 1278 "configuration information\n"); 1279 #endif 1280 return; 1281 } 1282 1283 static int __init disable_acpi_irq(const struct dmi_system_id *d) 1284 { 1285 if (!acpi_force) { 1286 printk(KERN_NOTICE "%s detected: force use of acpi=noirq\n", 1287 d->ident); 1288 acpi_noirq_set(); 1289 } 1290 return 0; 1291 } 1292 1293 static int __init disable_acpi_pci(const struct dmi_system_id *d) 1294 { 1295 if (!acpi_force) { 1296 printk(KERN_NOTICE "%s detected: force use of pci=noacpi\n", 1297 d->ident); 1298 acpi_disable_pci(); 1299 } 1300 return 0; 1301 } 1302 1303 static int __init dmi_disable_acpi(const struct dmi_system_id *d) 1304 { 1305 if (!acpi_force) { 1306 printk(KERN_NOTICE "%s detected: acpi off\n", d->ident); 1307 disable_acpi(); 1308 } else { 1309 printk(KERN_NOTICE 1310 "Warning: DMI blacklist says broken, but acpi forced\n"); 1311 } 1312 return 0; 1313 } 1314 1315 /* 1316 * Force ignoring BIOS IRQ0 override 1317 */ 1318 static int __init dmi_ignore_irq0_timer_override(const struct dmi_system_id *d) 1319 { 1320 if (!acpi_skip_timer_override) { 1321 pr_notice("%s detected: Ignoring BIOS IRQ0 override\n", 1322 d->ident); 1323 acpi_skip_timer_override = 1; 1324 } 1325 return 0; 1326 } 1327 1328 /* 1329 * ACPI offers an alternative platform interface model that removes 1330 * ACPI hardware requirements for platforms that do not implement 1331 * the PC Architecture. 1332 * 1333 * We initialize the Hardware-reduced ACPI model here: 1334 */ 1335 static void __init acpi_reduced_hw_init(void) 1336 { 1337 if (acpi_gbl_reduced_hardware) { 1338 /* 1339 * Override x86_init functions and bypass legacy pic 1340 * in Hardware-reduced ACPI mode 1341 */ 1342 x86_init.timers.timer_init = x86_init_noop; 1343 x86_init.irqs.pre_vector_init = x86_init_noop; 1344 legacy_pic = &null_legacy_pic; 1345 } 1346 } 1347 1348 /* 1349 * If your system is blacklisted here, but you find that acpi=force 1350 * works for you, please contact linux-acpi@vger.kernel.org 1351 */ 1352 static struct dmi_system_id __initdata acpi_dmi_table[] = { 1353 /* 1354 * Boxes that need ACPI disabled 1355 */ 1356 { 1357 .callback = dmi_disable_acpi, 1358 .ident = "IBM Thinkpad", 1359 .matches = { 1360 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), 1361 DMI_MATCH(DMI_BOARD_NAME, "2629H1G"), 1362 }, 1363 }, 1364 1365 /* 1366 * Boxes that need ACPI PCI IRQ routing disabled 1367 */ 1368 { 1369 .callback = disable_acpi_irq, 1370 .ident = "ASUS A7V", 1371 .matches = { 1372 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC"), 1373 DMI_MATCH(DMI_BOARD_NAME, "<A7V>"), 1374 /* newer BIOS, Revision 1011, does work */ 1375 DMI_MATCH(DMI_BIOS_VERSION, 1376 "ASUS A7V ACPI BIOS Revision 1007"), 1377 }, 1378 }, 1379 { 1380 /* 1381 * Latest BIOS for IBM 600E (1.16) has bad pcinum 1382 * for LPC bridge, which is needed for the PCI 1383 * interrupt links to work. DSDT fix is in bug 5966. 1384 * 2645, 2646 model numbers are shared with 600/600E/600X 1385 */ 1386 .callback = disable_acpi_irq, 1387 .ident = "IBM Thinkpad 600 Series 2645", 1388 .matches = { 1389 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), 1390 DMI_MATCH(DMI_BOARD_NAME, "2645"), 1391 }, 1392 }, 1393 { 1394 .callback = disable_acpi_irq, 1395 .ident = "IBM Thinkpad 600 Series 2646", 1396 .matches = { 1397 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), 1398 DMI_MATCH(DMI_BOARD_NAME, "2646"), 1399 }, 1400 }, 1401 /* 1402 * Boxes that need ACPI PCI IRQ routing and PCI scan disabled 1403 */ 1404 { /* _BBN 0 bug */ 1405 .callback = disable_acpi_pci, 1406 .ident = "ASUS PR-DLS", 1407 .matches = { 1408 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."), 1409 DMI_MATCH(DMI_BOARD_NAME, "PR-DLS"), 1410 DMI_MATCH(DMI_BIOS_VERSION, 1411 "ASUS PR-DLS ACPI BIOS Revision 1010"), 1412 DMI_MATCH(DMI_BIOS_DATE, "03/21/2003") 1413 }, 1414 }, 1415 { 1416 .callback = disable_acpi_pci, 1417 .ident = "Acer TravelMate 36x Laptop", 1418 .matches = { 1419 DMI_MATCH(DMI_SYS_VENDOR, "Acer"), 1420 DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"), 1421 }, 1422 }, 1423 {} 1424 }; 1425 1426 /* second table for DMI checks that should run after early-quirks */ 1427 static struct dmi_system_id __initdata acpi_dmi_table_late[] = { 1428 /* 1429 * HP laptops which use a DSDT reporting as HP/SB400/10000, 1430 * which includes some code which overrides all temperature 1431 * trip points to 16C if the INTIN2 input of the I/O APIC 1432 * is enabled. This input is incorrectly designated the 1433 * ISA IRQ 0 via an interrupt source override even though 1434 * it is wired to the output of the master 8259A and INTIN0 1435 * is not connected at all. Force ignoring BIOS IRQ0 1436 * override in that cases. 1437 */ 1438 { 1439 .callback = dmi_ignore_irq0_timer_override, 1440 .ident = "HP nx6115 laptop", 1441 .matches = { 1442 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 1443 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6115"), 1444 }, 1445 }, 1446 { 1447 .callback = dmi_ignore_irq0_timer_override, 1448 .ident = "HP NX6125 laptop", 1449 .matches = { 1450 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 1451 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6125"), 1452 }, 1453 }, 1454 { 1455 .callback = dmi_ignore_irq0_timer_override, 1456 .ident = "HP NX6325 laptop", 1457 .matches = { 1458 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 1459 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6325"), 1460 }, 1461 }, 1462 { 1463 .callback = dmi_ignore_irq0_timer_override, 1464 .ident = "HP 6715b laptop", 1465 .matches = { 1466 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 1467 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq 6715b"), 1468 }, 1469 }, 1470 { 1471 .callback = dmi_ignore_irq0_timer_override, 1472 .ident = "FUJITSU SIEMENS", 1473 .matches = { 1474 DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"), 1475 DMI_MATCH(DMI_PRODUCT_NAME, "AMILO PRO V2030"), 1476 }, 1477 }, 1478 {} 1479 }; 1480 1481 /* 1482 * acpi_boot_table_init() and acpi_boot_init() 1483 * called from setup_arch(), always. 1484 * 1. checksums all tables 1485 * 2. enumerates lapics 1486 * 3. enumerates io-apics 1487 * 1488 * acpi_table_init() is separate to allow reading SRAT without 1489 * other side effects. 1490 * 1491 * side effects of acpi_boot_init: 1492 * acpi_lapic = 1 if LAPIC found 1493 * acpi_ioapic = 1 if IOAPIC found 1494 * if (acpi_lapic && acpi_ioapic) smp_found_config = 1; 1495 * if acpi_blacklisted() acpi_disabled = 1; 1496 * acpi_irq_model=... 1497 * ... 1498 */ 1499 1500 void __init acpi_boot_table_init(void) 1501 { 1502 dmi_check_system(acpi_dmi_table); 1503 1504 /* 1505 * If acpi_disabled, bail out 1506 */ 1507 if (acpi_disabled) 1508 return; 1509 1510 /* 1511 * Initialize the ACPI boot-time table parser. 1512 */ 1513 if (acpi_table_init()) { 1514 disable_acpi(); 1515 return; 1516 } 1517 1518 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf); 1519 1520 /* 1521 * blacklist may disable ACPI entirely 1522 */ 1523 if (acpi_blacklisted()) { 1524 if (acpi_force) { 1525 printk(KERN_WARNING PREFIX "acpi=force override\n"); 1526 } else { 1527 printk(KERN_WARNING PREFIX "Disabling ACPI support\n"); 1528 disable_acpi(); 1529 return; 1530 } 1531 } 1532 } 1533 1534 int __init early_acpi_boot_init(void) 1535 { 1536 /* 1537 * If acpi_disabled, bail out 1538 */ 1539 if (acpi_disabled) 1540 return 1; 1541 1542 /* 1543 * Process the Multiple APIC Description Table (MADT), if present 1544 */ 1545 early_acpi_process_madt(); 1546 1547 /* 1548 * Hardware-reduced ACPI mode initialization: 1549 */ 1550 acpi_reduced_hw_init(); 1551 1552 return 0; 1553 } 1554 1555 int __init acpi_boot_init(void) 1556 { 1557 /* those are executed after early-quirks are executed */ 1558 dmi_check_system(acpi_dmi_table_late); 1559 1560 /* 1561 * If acpi_disabled, bail out 1562 */ 1563 if (acpi_disabled) 1564 return 1; 1565 1566 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf); 1567 1568 /* 1569 * set sci_int and PM timer address 1570 */ 1571 acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt); 1572 1573 /* 1574 * Process the Multiple APIC Description Table (MADT), if present 1575 */ 1576 acpi_process_madt(); 1577 1578 acpi_table_parse(ACPI_SIG_HPET, acpi_parse_hpet); 1579 1580 if (!acpi_noirq) 1581 x86_init.pci.init = pci_acpi_init; 1582 1583 return 0; 1584 } 1585 1586 static int __init parse_acpi(char *arg) 1587 { 1588 if (!arg) 1589 return -EINVAL; 1590 1591 /* "acpi=off" disables both ACPI table parsing and interpreter */ 1592 if (strcmp(arg, "off") == 0) { 1593 disable_acpi(); 1594 } 1595 /* acpi=force to over-ride black-list */ 1596 else if (strcmp(arg, "force") == 0) { 1597 acpi_force = 1; 1598 acpi_disabled = 0; 1599 } 1600 /* acpi=strict disables out-of-spec workarounds */ 1601 else if (strcmp(arg, "strict") == 0) { 1602 acpi_strict = 1; 1603 } 1604 /* acpi=rsdt use RSDT instead of XSDT */ 1605 else if (strcmp(arg, "rsdt") == 0) { 1606 acpi_gbl_do_not_use_xsdt = TRUE; 1607 } 1608 /* "acpi=noirq" disables ACPI interrupt routing */ 1609 else if (strcmp(arg, "noirq") == 0) { 1610 acpi_noirq_set(); 1611 } 1612 /* "acpi=copy_dsdt" copys DSDT */ 1613 else if (strcmp(arg, "copy_dsdt") == 0) { 1614 acpi_gbl_copy_dsdt_locally = 1; 1615 } 1616 /* "acpi=nocmcff" disables FF mode for corrected errors */ 1617 else if (strcmp(arg, "nocmcff") == 0) { 1618 acpi_disable_cmcff = 1; 1619 } else { 1620 /* Core will printk when we return error. */ 1621 return -EINVAL; 1622 } 1623 return 0; 1624 } 1625 early_param("acpi", parse_acpi); 1626 1627 /* FIXME: Using pci= for an ACPI parameter is a travesty. */ 1628 static int __init parse_pci(char *arg) 1629 { 1630 if (arg && strcmp(arg, "noacpi") == 0) 1631 acpi_disable_pci(); 1632 return 0; 1633 } 1634 early_param("pci", parse_pci); 1635 1636 int __init acpi_mps_check(void) 1637 { 1638 #if defined(CONFIG_X86_LOCAL_APIC) && !defined(CONFIG_X86_MPPARSE) 1639 /* mptable code is not built-in*/ 1640 if (acpi_disabled || acpi_noirq) { 1641 printk(KERN_WARNING "MPS support code is not built-in.\n" 1642 "Using acpi=off or acpi=noirq or pci=noacpi " 1643 "may have problem\n"); 1644 return 1; 1645 } 1646 #endif 1647 return 0; 1648 } 1649 1650 #ifdef CONFIG_X86_IO_APIC 1651 static int __init parse_acpi_skip_timer_override(char *arg) 1652 { 1653 acpi_skip_timer_override = 1; 1654 return 0; 1655 } 1656 early_param("acpi_skip_timer_override", parse_acpi_skip_timer_override); 1657 1658 static int __init parse_acpi_use_timer_override(char *arg) 1659 { 1660 acpi_use_timer_override = 1; 1661 return 0; 1662 } 1663 early_param("acpi_use_timer_override", parse_acpi_use_timer_override); 1664 #endif /* CONFIG_X86_IO_APIC */ 1665 1666 static int __init setup_acpi_sci(char *s) 1667 { 1668 if (!s) 1669 return -EINVAL; 1670 if (!strcmp(s, "edge")) 1671 acpi_sci_flags = ACPI_MADT_TRIGGER_EDGE | 1672 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK); 1673 else if (!strcmp(s, "level")) 1674 acpi_sci_flags = ACPI_MADT_TRIGGER_LEVEL | 1675 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK); 1676 else if (!strcmp(s, "high")) 1677 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_HIGH | 1678 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK); 1679 else if (!strcmp(s, "low")) 1680 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_LOW | 1681 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK); 1682 else 1683 return -EINVAL; 1684 return 0; 1685 } 1686 early_param("acpi_sci", setup_acpi_sci); 1687 1688 int __acpi_acquire_global_lock(unsigned int *lock) 1689 { 1690 unsigned int old, new, val; 1691 do { 1692 old = *lock; 1693 new = (((old & ~0x3) + 2) + ((old >> 1) & 0x1)); 1694 val = cmpxchg(lock, old, new); 1695 } while (unlikely (val != old)); 1696 return (new < 3) ? -1 : 0; 1697 } 1698 1699 int __acpi_release_global_lock(unsigned int *lock) 1700 { 1701 unsigned int old, new, val; 1702 do { 1703 old = *lock; 1704 new = old & ~0x3; 1705 val = cmpxchg(lock, old, new); 1706 } while (unlikely (val != old)); 1707 return old & 0x1; 1708 } 1709 1710 void __init arch_reserve_mem_area(acpi_physical_address addr, size_t size) 1711 { 1712 e820_add_region(addr, size, E820_ACPI); 1713 update_e820(); 1714 } 1715