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 acpi_penalize_sci_irq(bus_irq, trigger, polarity); 449 450 /* 451 * stash over-ride to indicate we've been here 452 * and for later update of acpi_gbl_FADT 453 */ 454 acpi_sci_override_gsi = gsi; 455 return; 456 } 457 458 static int __init 459 acpi_parse_int_src_ovr(struct acpi_subtable_header * header, 460 const unsigned long end) 461 { 462 struct acpi_madt_interrupt_override *intsrc = NULL; 463 464 intsrc = (struct acpi_madt_interrupt_override *)header; 465 466 if (BAD_MADT_ENTRY(intsrc, end)) 467 return -EINVAL; 468 469 acpi_table_print_madt_entry(header); 470 471 if (intsrc->source_irq == acpi_gbl_FADT.sci_interrupt) { 472 acpi_sci_ioapic_setup(intsrc->source_irq, 473 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK, 474 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2, 475 intsrc->global_irq); 476 return 0; 477 } 478 479 if (intsrc->source_irq == 0) { 480 if (acpi_skip_timer_override) { 481 printk(PREFIX "BIOS IRQ0 override ignored.\n"); 482 return 0; 483 } 484 485 if ((intsrc->global_irq == 2) && acpi_fix_pin2_polarity 486 && (intsrc->inti_flags & ACPI_MADT_POLARITY_MASK)) { 487 intsrc->inti_flags &= ~ACPI_MADT_POLARITY_MASK; 488 printk(PREFIX "BIOS IRQ0 pin2 override: forcing polarity to high active.\n"); 489 } 490 } 491 492 mp_override_legacy_irq(intsrc->source_irq, 493 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK, 494 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2, 495 intsrc->global_irq); 496 497 return 0; 498 } 499 500 static int __init 501 acpi_parse_nmi_src(struct acpi_subtable_header * header, const unsigned long end) 502 { 503 struct acpi_madt_nmi_source *nmi_src = NULL; 504 505 nmi_src = (struct acpi_madt_nmi_source *)header; 506 507 if (BAD_MADT_ENTRY(nmi_src, end)) 508 return -EINVAL; 509 510 acpi_table_print_madt_entry(header); 511 512 /* TBD: Support nimsrc entries? */ 513 514 return 0; 515 } 516 517 #endif /* CONFIG_X86_IO_APIC */ 518 519 /* 520 * acpi_pic_sci_set_trigger() 521 * 522 * use ELCR to set PIC-mode trigger type for SCI 523 * 524 * If a PIC-mode SCI is not recognized or gives spurious IRQ7's 525 * it may require Edge Trigger -- use "acpi_sci=edge" 526 * 527 * Port 0x4d0-4d1 are ECLR1 and ECLR2, the Edge/Level Control Registers 528 * for the 8259 PIC. bit[n] = 1 means irq[n] is Level, otherwise Edge. 529 * ECLR1 is IRQs 0-7 (IRQ 0, 1, 2 must be 0) 530 * ECLR2 is IRQs 8-15 (IRQ 8, 13 must be 0) 531 */ 532 533 void __init acpi_pic_sci_set_trigger(unsigned int irq, u16 trigger) 534 { 535 unsigned int mask = 1 << irq; 536 unsigned int old, new; 537 538 /* Real old ELCR mask */ 539 old = inb(0x4d0) | (inb(0x4d1) << 8); 540 541 /* 542 * If we use ACPI to set PCI IRQs, then we should clear ELCR 543 * since we will set it correctly as we enable the PCI irq 544 * routing. 545 */ 546 new = acpi_noirq ? old : 0; 547 548 /* 549 * Update SCI information in the ELCR, it isn't in the PCI 550 * routing tables.. 551 */ 552 switch (trigger) { 553 case 1: /* Edge - clear */ 554 new &= ~mask; 555 break; 556 case 3: /* Level - set */ 557 new |= mask; 558 break; 559 } 560 561 if (old == new) 562 return; 563 564 printk(PREFIX "setting ELCR to %04x (from %04x)\n", new, old); 565 outb(new, 0x4d0); 566 outb(new >> 8, 0x4d1); 567 } 568 569 int acpi_gsi_to_irq(u32 gsi, unsigned int *irqp) 570 { 571 int rc, irq, trigger, polarity; 572 573 if (acpi_irq_model == ACPI_IRQ_MODEL_PIC) { 574 *irqp = gsi; 575 return 0; 576 } 577 578 rc = acpi_get_override_irq(gsi, &trigger, &polarity); 579 if (rc == 0) { 580 trigger = trigger ? ACPI_LEVEL_SENSITIVE : ACPI_EDGE_SENSITIVE; 581 polarity = polarity ? ACPI_ACTIVE_LOW : ACPI_ACTIVE_HIGH; 582 irq = acpi_register_gsi(NULL, gsi, trigger, polarity); 583 if (irq >= 0) { 584 *irqp = irq; 585 return 0; 586 } 587 } 588 589 return -1; 590 } 591 EXPORT_SYMBOL_GPL(acpi_gsi_to_irq); 592 593 int acpi_isa_irq_to_gsi(unsigned isa_irq, u32 *gsi) 594 { 595 if (isa_irq < nr_legacy_irqs() && 596 isa_irq_to_gsi[isa_irq] != ACPI_INVALID_GSI) { 597 *gsi = isa_irq_to_gsi[isa_irq]; 598 return 0; 599 } 600 601 return -1; 602 } 603 604 static int acpi_register_gsi_pic(struct device *dev, u32 gsi, 605 int trigger, int polarity) 606 { 607 #ifdef CONFIG_PCI 608 /* 609 * Make sure all (legacy) PCI IRQs are set as level-triggered. 610 */ 611 if (trigger == ACPI_LEVEL_SENSITIVE) 612 elcr_set_level_irq(gsi); 613 #endif 614 615 return gsi; 616 } 617 618 #ifdef CONFIG_X86_LOCAL_APIC 619 static int acpi_register_gsi_ioapic(struct device *dev, u32 gsi, 620 int trigger, int polarity) 621 { 622 int irq = gsi; 623 #ifdef CONFIG_X86_IO_APIC 624 int node; 625 struct irq_alloc_info info; 626 627 node = dev ? dev_to_node(dev) : NUMA_NO_NODE; 628 trigger = trigger == ACPI_EDGE_SENSITIVE ? 0 : 1; 629 polarity = polarity == ACPI_ACTIVE_HIGH ? 0 : 1; 630 ioapic_set_alloc_attr(&info, node, trigger, polarity); 631 632 mutex_lock(&acpi_ioapic_lock); 633 irq = mp_map_gsi_to_irq(gsi, IOAPIC_MAP_ALLOC, &info); 634 /* Don't set up the ACPI SCI because it's already set up */ 635 if (irq >= 0 && enable_update_mptable && 636 acpi_gbl_FADT.sci_interrupt != gsi) 637 mp_config_acpi_gsi(dev, gsi, trigger, polarity); 638 mutex_unlock(&acpi_ioapic_lock); 639 #endif 640 641 return irq; 642 } 643 644 static void acpi_unregister_gsi_ioapic(u32 gsi) 645 { 646 #ifdef CONFIG_X86_IO_APIC 647 int irq; 648 649 mutex_lock(&acpi_ioapic_lock); 650 irq = mp_map_gsi_to_irq(gsi, 0, NULL); 651 if (irq > 0) 652 mp_unmap_irq(irq); 653 mutex_unlock(&acpi_ioapic_lock); 654 #endif 655 } 656 #endif 657 658 int (*__acpi_register_gsi)(struct device *dev, u32 gsi, 659 int trigger, int polarity) = acpi_register_gsi_pic; 660 void (*__acpi_unregister_gsi)(u32 gsi) = NULL; 661 662 #ifdef CONFIG_ACPI_SLEEP 663 int (*acpi_suspend_lowlevel)(void) = x86_acpi_suspend_lowlevel; 664 #else 665 int (*acpi_suspend_lowlevel)(void); 666 #endif 667 668 /* 669 * success: return IRQ number (>=0) 670 * failure: return < 0 671 */ 672 int acpi_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity) 673 { 674 return __acpi_register_gsi(dev, gsi, trigger, polarity); 675 } 676 EXPORT_SYMBOL_GPL(acpi_register_gsi); 677 678 void acpi_unregister_gsi(u32 gsi) 679 { 680 if (__acpi_unregister_gsi) 681 __acpi_unregister_gsi(gsi); 682 } 683 EXPORT_SYMBOL_GPL(acpi_unregister_gsi); 684 685 #ifdef CONFIG_X86_LOCAL_APIC 686 static void __init acpi_set_irq_model_ioapic(void) 687 { 688 acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC; 689 __acpi_register_gsi = acpi_register_gsi_ioapic; 690 __acpi_unregister_gsi = acpi_unregister_gsi_ioapic; 691 acpi_ioapic = 1; 692 } 693 #endif 694 695 /* 696 * ACPI based hotplug support for CPU 697 */ 698 #ifdef CONFIG_ACPI_HOTPLUG_CPU 699 #include <acpi/processor.h> 700 701 static void acpi_map_cpu2node(acpi_handle handle, int cpu, int physid) 702 { 703 #ifdef CONFIG_ACPI_NUMA 704 int nid; 705 706 nid = acpi_get_node(handle); 707 if (nid != -1) { 708 set_apicid_to_node(physid, nid); 709 numa_set_node(cpu, nid); 710 } 711 #endif 712 } 713 714 int acpi_map_cpu(acpi_handle handle, phys_cpuid_t physid, int *pcpu) 715 { 716 int cpu; 717 718 cpu = acpi_register_lapic(physid, ACPI_MADT_ENABLED); 719 if (cpu < 0) { 720 pr_info(PREFIX "Unable to map lapic to logical cpu number\n"); 721 return cpu; 722 } 723 724 acpi_processor_set_pdc(handle); 725 acpi_map_cpu2node(handle, cpu, physid); 726 727 *pcpu = cpu; 728 return 0; 729 } 730 EXPORT_SYMBOL(acpi_map_cpu); 731 732 int acpi_unmap_cpu(int cpu) 733 { 734 #ifdef CONFIG_ACPI_NUMA 735 set_apicid_to_node(per_cpu(x86_cpu_to_apicid, cpu), NUMA_NO_NODE); 736 #endif 737 738 per_cpu(x86_cpu_to_apicid, cpu) = -1; 739 set_cpu_present(cpu, false); 740 num_processors--; 741 742 return (0); 743 } 744 EXPORT_SYMBOL(acpi_unmap_cpu); 745 #endif /* CONFIG_ACPI_HOTPLUG_CPU */ 746 747 int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base) 748 { 749 int ret = -ENOSYS; 750 #ifdef CONFIG_ACPI_HOTPLUG_IOAPIC 751 int ioapic_id; 752 u64 addr; 753 struct ioapic_domain_cfg cfg = { 754 .type = IOAPIC_DOMAIN_DYNAMIC, 755 .ops = &mp_ioapic_irqdomain_ops, 756 }; 757 758 ioapic_id = acpi_get_ioapic_id(handle, gsi_base, &addr); 759 if (ioapic_id < 0) { 760 unsigned long long uid; 761 acpi_status status; 762 763 status = acpi_evaluate_integer(handle, METHOD_NAME__UID, 764 NULL, &uid); 765 if (ACPI_FAILURE(status)) { 766 acpi_handle_warn(handle, "failed to get IOAPIC ID.\n"); 767 return -EINVAL; 768 } 769 ioapic_id = (int)uid; 770 } 771 772 mutex_lock(&acpi_ioapic_lock); 773 ret = mp_register_ioapic(ioapic_id, phys_addr, gsi_base, &cfg); 774 mutex_unlock(&acpi_ioapic_lock); 775 #endif 776 777 return ret; 778 } 779 EXPORT_SYMBOL(acpi_register_ioapic); 780 781 int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base) 782 { 783 int ret = -ENOSYS; 784 785 #ifdef CONFIG_ACPI_HOTPLUG_IOAPIC 786 mutex_lock(&acpi_ioapic_lock); 787 ret = mp_unregister_ioapic(gsi_base); 788 mutex_unlock(&acpi_ioapic_lock); 789 #endif 790 791 return ret; 792 } 793 EXPORT_SYMBOL(acpi_unregister_ioapic); 794 795 /** 796 * acpi_ioapic_registered - Check whether IOAPIC assoicatied with @gsi_base 797 * has been registered 798 * @handle: ACPI handle of the IOAPIC deivce 799 * @gsi_base: GSI base associated with the IOAPIC 800 * 801 * Assume caller holds some type of lock to serialize acpi_ioapic_registered() 802 * with acpi_register_ioapic()/acpi_unregister_ioapic(). 803 */ 804 int acpi_ioapic_registered(acpi_handle handle, u32 gsi_base) 805 { 806 int ret = 0; 807 808 #ifdef CONFIG_ACPI_HOTPLUG_IOAPIC 809 mutex_lock(&acpi_ioapic_lock); 810 ret = mp_ioapic_registered(gsi_base); 811 mutex_unlock(&acpi_ioapic_lock); 812 #endif 813 814 return ret; 815 } 816 817 static int __init acpi_parse_sbf(struct acpi_table_header *table) 818 { 819 struct acpi_table_boot *sb = (struct acpi_table_boot *)table; 820 821 sbf_port = sb->cmos_index; /* Save CMOS port */ 822 823 return 0; 824 } 825 826 #ifdef CONFIG_HPET_TIMER 827 #include <asm/hpet.h> 828 829 static struct resource *hpet_res __initdata; 830 831 static int __init acpi_parse_hpet(struct acpi_table_header *table) 832 { 833 struct acpi_table_hpet *hpet_tbl = (struct acpi_table_hpet *)table; 834 835 if (hpet_tbl->address.space_id != ACPI_SPACE_MEM) { 836 printk(KERN_WARNING PREFIX "HPET timers must be located in " 837 "memory.\n"); 838 return -1; 839 } 840 841 hpet_address = hpet_tbl->address.address; 842 hpet_blockid = hpet_tbl->sequence; 843 844 /* 845 * Some broken BIOSes advertise HPET at 0x0. We really do not 846 * want to allocate a resource there. 847 */ 848 if (!hpet_address) { 849 printk(KERN_WARNING PREFIX 850 "HPET id: %#x base: %#lx is invalid\n", 851 hpet_tbl->id, hpet_address); 852 return 0; 853 } 854 #ifdef CONFIG_X86_64 855 /* 856 * Some even more broken BIOSes advertise HPET at 857 * 0xfed0000000000000 instead of 0xfed00000. Fix it up and add 858 * some noise: 859 */ 860 if (hpet_address == 0xfed0000000000000UL) { 861 if (!hpet_force_user) { 862 printk(KERN_WARNING PREFIX "HPET id: %#x " 863 "base: 0xfed0000000000000 is bogus\n " 864 "try hpet=force on the kernel command line to " 865 "fix it up to 0xfed00000.\n", hpet_tbl->id); 866 hpet_address = 0; 867 return 0; 868 } 869 printk(KERN_WARNING PREFIX 870 "HPET id: %#x base: 0xfed0000000000000 fixed up " 871 "to 0xfed00000.\n", hpet_tbl->id); 872 hpet_address >>= 32; 873 } 874 #endif 875 printk(KERN_INFO PREFIX "HPET id: %#x base: %#lx\n", 876 hpet_tbl->id, hpet_address); 877 878 /* 879 * Allocate and initialize the HPET firmware resource for adding into 880 * the resource tree during the lateinit timeframe. 881 */ 882 #define HPET_RESOURCE_NAME_SIZE 9 883 hpet_res = alloc_bootmem(sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE); 884 885 hpet_res->name = (void *)&hpet_res[1]; 886 hpet_res->flags = IORESOURCE_MEM; 887 snprintf((char *)hpet_res->name, HPET_RESOURCE_NAME_SIZE, "HPET %u", 888 hpet_tbl->sequence); 889 890 hpet_res->start = hpet_address; 891 hpet_res->end = hpet_address + (1 * 1024) - 1; 892 893 return 0; 894 } 895 896 /* 897 * hpet_insert_resource inserts the HPET resources used into the resource 898 * tree. 899 */ 900 static __init int hpet_insert_resource(void) 901 { 902 if (!hpet_res) 903 return 1; 904 905 return insert_resource(&iomem_resource, hpet_res); 906 } 907 908 late_initcall(hpet_insert_resource); 909 910 #else 911 #define acpi_parse_hpet NULL 912 #endif 913 914 static int __init acpi_parse_fadt(struct acpi_table_header *table) 915 { 916 if (!(acpi_gbl_FADT.boot_flags & ACPI_FADT_LEGACY_DEVICES)) { 917 pr_debug("ACPI: no legacy devices present\n"); 918 x86_platform.legacy.devices.pnpbios = 0; 919 } 920 921 if (acpi_gbl_FADT.boot_flags & ACPI_FADT_NO_CMOS_RTC) { 922 pr_debug("ACPI: not registering RTC platform device\n"); 923 x86_platform.legacy.rtc = 0; 924 } 925 926 #ifdef CONFIG_X86_PM_TIMER 927 /* detect the location of the ACPI PM Timer */ 928 if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID) { 929 /* FADT rev. 2 */ 930 if (acpi_gbl_FADT.xpm_timer_block.space_id != 931 ACPI_ADR_SPACE_SYSTEM_IO) 932 return 0; 933 934 pmtmr_ioport = acpi_gbl_FADT.xpm_timer_block.address; 935 /* 936 * "X" fields are optional extensions to the original V1.0 937 * fields, so we must selectively expand V1.0 fields if the 938 * corresponding X field is zero. 939 */ 940 if (!pmtmr_ioport) 941 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block; 942 } else { 943 /* FADT rev. 1 */ 944 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block; 945 } 946 if (pmtmr_ioport) 947 printk(KERN_INFO PREFIX "PM-Timer IO Port: %#x\n", 948 pmtmr_ioport); 949 #endif 950 return 0; 951 } 952 953 #ifdef CONFIG_X86_LOCAL_APIC 954 /* 955 * Parse LAPIC entries in MADT 956 * returns 0 on success, < 0 on error 957 */ 958 959 static int __init early_acpi_parse_madt_lapic_addr_ovr(void) 960 { 961 int count; 962 963 if (!boot_cpu_has(X86_FEATURE_APIC)) 964 return -ENODEV; 965 966 /* 967 * Note that the LAPIC address is obtained from the MADT (32-bit value) 968 * and (optionally) overridden by a LAPIC_ADDR_OVR entry (64-bit value). 969 */ 970 971 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE, 972 acpi_parse_lapic_addr_ovr, 0); 973 if (count < 0) { 974 printk(KERN_ERR PREFIX 975 "Error parsing LAPIC address override entry\n"); 976 return count; 977 } 978 979 register_lapic_address(acpi_lapic_addr); 980 981 return count; 982 } 983 984 static int __init acpi_parse_madt_lapic_entries(void) 985 { 986 int count; 987 int x2count = 0; 988 int ret; 989 struct acpi_subtable_proc madt_proc[2]; 990 991 if (!boot_cpu_has(X86_FEATURE_APIC)) 992 return -ENODEV; 993 994 /* 995 * Note that the LAPIC address is obtained from the MADT (32-bit value) 996 * and (optionally) overridden by a LAPIC_ADDR_OVR entry (64-bit value). 997 */ 998 999 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE, 1000 acpi_parse_lapic_addr_ovr, 0); 1001 if (count < 0) { 1002 printk(KERN_ERR PREFIX 1003 "Error parsing LAPIC address override entry\n"); 1004 return count; 1005 } 1006 1007 register_lapic_address(acpi_lapic_addr); 1008 1009 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC, 1010 acpi_parse_sapic, MAX_LOCAL_APIC); 1011 1012 if (!count) { 1013 memset(madt_proc, 0, sizeof(madt_proc)); 1014 madt_proc[0].id = ACPI_MADT_TYPE_LOCAL_APIC; 1015 madt_proc[0].handler = acpi_parse_lapic; 1016 madt_proc[1].id = ACPI_MADT_TYPE_LOCAL_X2APIC; 1017 madt_proc[1].handler = acpi_parse_x2apic; 1018 ret = acpi_table_parse_entries_array(ACPI_SIG_MADT, 1019 sizeof(struct acpi_table_madt), 1020 madt_proc, ARRAY_SIZE(madt_proc), MAX_LOCAL_APIC); 1021 if (ret < 0) { 1022 printk(KERN_ERR PREFIX 1023 "Error parsing LAPIC/X2APIC entries\n"); 1024 return ret; 1025 } 1026 1027 x2count = madt_proc[0].count; 1028 count = madt_proc[1].count; 1029 } 1030 if (!count && !x2count) { 1031 printk(KERN_ERR PREFIX "No LAPIC entries present\n"); 1032 /* TBD: Cleanup to allow fallback to MPS */ 1033 return -ENODEV; 1034 } else if (count < 0 || x2count < 0) { 1035 printk(KERN_ERR PREFIX "Error parsing LAPIC entry\n"); 1036 /* TBD: Cleanup to allow fallback to MPS */ 1037 return count; 1038 } 1039 1040 x2count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC_NMI, 1041 acpi_parse_x2apic_nmi, 0); 1042 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI, 1043 acpi_parse_lapic_nmi, 0); 1044 if (count < 0 || x2count < 0) { 1045 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n"); 1046 /* TBD: Cleanup to allow fallback to MPS */ 1047 return count; 1048 } 1049 return 0; 1050 } 1051 #endif /* CONFIG_X86_LOCAL_APIC */ 1052 1053 #ifdef CONFIG_X86_IO_APIC 1054 static void __init mp_config_acpi_legacy_irqs(void) 1055 { 1056 int i; 1057 struct mpc_intsrc mp_irq; 1058 1059 #ifdef CONFIG_EISA 1060 /* 1061 * Fabricate the legacy ISA bus (bus #31). 1062 */ 1063 mp_bus_id_to_type[MP_ISA_BUS] = MP_BUS_ISA; 1064 #endif 1065 set_bit(MP_ISA_BUS, mp_bus_not_pci); 1066 pr_debug("Bus #%d is ISA\n", MP_ISA_BUS); 1067 1068 /* 1069 * Use the default configuration for the IRQs 0-15. Unless 1070 * overridden by (MADT) interrupt source override entries. 1071 */ 1072 for (i = 0; i < nr_legacy_irqs(); i++) { 1073 int ioapic, pin; 1074 unsigned int dstapic; 1075 int idx; 1076 u32 gsi; 1077 1078 /* Locate the gsi that irq i maps to. */ 1079 if (acpi_isa_irq_to_gsi(i, &gsi)) 1080 continue; 1081 1082 /* 1083 * Locate the IOAPIC that manages the ISA IRQ. 1084 */ 1085 ioapic = mp_find_ioapic(gsi); 1086 if (ioapic < 0) 1087 continue; 1088 pin = mp_find_ioapic_pin(ioapic, gsi); 1089 dstapic = mpc_ioapic_id(ioapic); 1090 1091 for (idx = 0; idx < mp_irq_entries; idx++) { 1092 struct mpc_intsrc *irq = mp_irqs + idx; 1093 1094 /* Do we already have a mapping for this ISA IRQ? */ 1095 if (irq->srcbus == MP_ISA_BUS && irq->srcbusirq == i) 1096 break; 1097 1098 /* Do we already have a mapping for this IOAPIC pin */ 1099 if (irq->dstapic == dstapic && irq->dstirq == pin) 1100 break; 1101 } 1102 1103 if (idx != mp_irq_entries) { 1104 printk(KERN_DEBUG "ACPI: IRQ%d used by override.\n", i); 1105 continue; /* IRQ already used */ 1106 } 1107 1108 mp_irq.type = MP_INTSRC; 1109 mp_irq.irqflag = 0; /* Conforming */ 1110 mp_irq.srcbus = MP_ISA_BUS; 1111 mp_irq.dstapic = dstapic; 1112 mp_irq.irqtype = mp_INT; 1113 mp_irq.srcbusirq = i; /* Identity mapped */ 1114 mp_irq.dstirq = pin; 1115 1116 mp_save_irq(&mp_irq); 1117 } 1118 } 1119 1120 /* 1121 * Parse IOAPIC related entries in MADT 1122 * returns 0 on success, < 0 on error 1123 */ 1124 static int __init acpi_parse_madt_ioapic_entries(void) 1125 { 1126 int count; 1127 1128 /* 1129 * ACPI interpreter is required to complete interrupt setup, 1130 * so if it is off, don't enumerate the io-apics with ACPI. 1131 * If MPS is present, it will handle them, 1132 * otherwise the system will stay in PIC mode 1133 */ 1134 if (acpi_disabled || acpi_noirq) 1135 return -ENODEV; 1136 1137 if (!boot_cpu_has(X86_FEATURE_APIC)) 1138 return -ENODEV; 1139 1140 /* 1141 * if "noapic" boot option, don't look for IO-APICs 1142 */ 1143 if (skip_ioapic_setup) { 1144 printk(KERN_INFO PREFIX "Skipping IOAPIC probe " 1145 "due to 'noapic' option.\n"); 1146 return -ENODEV; 1147 } 1148 1149 count = acpi_table_parse_madt(ACPI_MADT_TYPE_IO_APIC, acpi_parse_ioapic, 1150 MAX_IO_APICS); 1151 if (!count) { 1152 printk(KERN_ERR PREFIX "No IOAPIC entries present\n"); 1153 return -ENODEV; 1154 } else if (count < 0) { 1155 printk(KERN_ERR PREFIX "Error parsing IOAPIC entry\n"); 1156 return count; 1157 } 1158 1159 count = acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE, 1160 acpi_parse_int_src_ovr, nr_irqs); 1161 if (count < 0) { 1162 printk(KERN_ERR PREFIX 1163 "Error parsing interrupt source overrides entry\n"); 1164 /* TBD: Cleanup to allow fallback to MPS */ 1165 return count; 1166 } 1167 1168 /* 1169 * If BIOS did not supply an INT_SRC_OVR for the SCI 1170 * pretend we got one so we can set the SCI flags. 1171 */ 1172 if (!acpi_sci_override_gsi) 1173 acpi_sci_ioapic_setup(acpi_gbl_FADT.sci_interrupt, 0, 0, 1174 acpi_gbl_FADT.sci_interrupt); 1175 1176 /* Fill in identity legacy mappings where no override */ 1177 mp_config_acpi_legacy_irqs(); 1178 1179 count = acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE, 1180 acpi_parse_nmi_src, nr_irqs); 1181 if (count < 0) { 1182 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n"); 1183 /* TBD: Cleanup to allow fallback to MPS */ 1184 return count; 1185 } 1186 1187 return 0; 1188 } 1189 #else 1190 static inline int acpi_parse_madt_ioapic_entries(void) 1191 { 1192 return -1; 1193 } 1194 #endif /* !CONFIG_X86_IO_APIC */ 1195 1196 static void __init early_acpi_process_madt(void) 1197 { 1198 #ifdef CONFIG_X86_LOCAL_APIC 1199 int error; 1200 1201 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) { 1202 1203 /* 1204 * Parse MADT LAPIC entries 1205 */ 1206 error = early_acpi_parse_madt_lapic_addr_ovr(); 1207 if (!error) { 1208 acpi_lapic = 1; 1209 smp_found_config = 1; 1210 } 1211 if (error == -EINVAL) { 1212 /* 1213 * Dell Precision Workstation 410, 610 come here. 1214 */ 1215 printk(KERN_ERR PREFIX 1216 "Invalid BIOS MADT, disabling ACPI\n"); 1217 disable_acpi(); 1218 } 1219 } 1220 #endif 1221 } 1222 1223 static void __init acpi_process_madt(void) 1224 { 1225 #ifdef CONFIG_X86_LOCAL_APIC 1226 int error; 1227 1228 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) { 1229 1230 /* 1231 * Parse MADT LAPIC entries 1232 */ 1233 error = acpi_parse_madt_lapic_entries(); 1234 if (!error) { 1235 acpi_lapic = 1; 1236 1237 /* 1238 * Parse MADT IO-APIC entries 1239 */ 1240 mutex_lock(&acpi_ioapic_lock); 1241 error = acpi_parse_madt_ioapic_entries(); 1242 mutex_unlock(&acpi_ioapic_lock); 1243 if (!error) { 1244 acpi_set_irq_model_ioapic(); 1245 1246 smp_found_config = 1; 1247 } 1248 } 1249 if (error == -EINVAL) { 1250 /* 1251 * Dell Precision Workstation 410, 610 come here. 1252 */ 1253 printk(KERN_ERR PREFIX 1254 "Invalid BIOS MADT, disabling ACPI\n"); 1255 disable_acpi(); 1256 } 1257 } else { 1258 /* 1259 * ACPI found no MADT, and so ACPI wants UP PIC mode. 1260 * In the event an MPS table was found, forget it. 1261 * Boot with "acpi=off" to use MPS on such a system. 1262 */ 1263 if (smp_found_config) { 1264 printk(KERN_WARNING PREFIX 1265 "No APIC-table, disabling MPS\n"); 1266 smp_found_config = 0; 1267 } 1268 } 1269 1270 /* 1271 * ACPI supports both logical (e.g. Hyper-Threading) and physical 1272 * processors, where MPS only supports physical. 1273 */ 1274 if (acpi_lapic && acpi_ioapic) 1275 printk(KERN_INFO "Using ACPI (MADT) for SMP configuration " 1276 "information\n"); 1277 else if (acpi_lapic) 1278 printk(KERN_INFO "Using ACPI for processor (LAPIC) " 1279 "configuration information\n"); 1280 #endif 1281 return; 1282 } 1283 1284 static int __init disable_acpi_irq(const struct dmi_system_id *d) 1285 { 1286 if (!acpi_force) { 1287 printk(KERN_NOTICE "%s detected: force use of acpi=noirq\n", 1288 d->ident); 1289 acpi_noirq_set(); 1290 } 1291 return 0; 1292 } 1293 1294 static int __init disable_acpi_pci(const struct dmi_system_id *d) 1295 { 1296 if (!acpi_force) { 1297 printk(KERN_NOTICE "%s detected: force use of pci=noacpi\n", 1298 d->ident); 1299 acpi_disable_pci(); 1300 } 1301 return 0; 1302 } 1303 1304 static int __init dmi_disable_acpi(const struct dmi_system_id *d) 1305 { 1306 if (!acpi_force) { 1307 printk(KERN_NOTICE "%s detected: acpi off\n", d->ident); 1308 disable_acpi(); 1309 } else { 1310 printk(KERN_NOTICE 1311 "Warning: DMI blacklist says broken, but acpi forced\n"); 1312 } 1313 return 0; 1314 } 1315 1316 /* 1317 * Force ignoring BIOS IRQ0 override 1318 */ 1319 static int __init dmi_ignore_irq0_timer_override(const struct dmi_system_id *d) 1320 { 1321 if (!acpi_skip_timer_override) { 1322 pr_notice("%s detected: Ignoring BIOS IRQ0 override\n", 1323 d->ident); 1324 acpi_skip_timer_override = 1; 1325 } 1326 return 0; 1327 } 1328 1329 /* 1330 * ACPI offers an alternative platform interface model that removes 1331 * ACPI hardware requirements for platforms that do not implement 1332 * the PC Architecture. 1333 * 1334 * We initialize the Hardware-reduced ACPI model here: 1335 */ 1336 static void __init acpi_reduced_hw_init(void) 1337 { 1338 if (acpi_gbl_reduced_hardware) { 1339 /* 1340 * Override x86_init functions and bypass legacy pic 1341 * in Hardware-reduced ACPI mode 1342 */ 1343 x86_init.timers.timer_init = x86_init_noop; 1344 x86_init.irqs.pre_vector_init = x86_init_noop; 1345 legacy_pic = &null_legacy_pic; 1346 } 1347 } 1348 1349 /* 1350 * If your system is blacklisted here, but you find that acpi=force 1351 * works for you, please contact linux-acpi@vger.kernel.org 1352 */ 1353 static struct dmi_system_id __initdata acpi_dmi_table[] = { 1354 /* 1355 * Boxes that need ACPI disabled 1356 */ 1357 { 1358 .callback = dmi_disable_acpi, 1359 .ident = "IBM Thinkpad", 1360 .matches = { 1361 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), 1362 DMI_MATCH(DMI_BOARD_NAME, "2629H1G"), 1363 }, 1364 }, 1365 1366 /* 1367 * Boxes that need ACPI PCI IRQ routing disabled 1368 */ 1369 { 1370 .callback = disable_acpi_irq, 1371 .ident = "ASUS A7V", 1372 .matches = { 1373 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC"), 1374 DMI_MATCH(DMI_BOARD_NAME, "<A7V>"), 1375 /* newer BIOS, Revision 1011, does work */ 1376 DMI_MATCH(DMI_BIOS_VERSION, 1377 "ASUS A7V ACPI BIOS Revision 1007"), 1378 }, 1379 }, 1380 { 1381 /* 1382 * Latest BIOS for IBM 600E (1.16) has bad pcinum 1383 * for LPC bridge, which is needed for the PCI 1384 * interrupt links to work. DSDT fix is in bug 5966. 1385 * 2645, 2646 model numbers are shared with 600/600E/600X 1386 */ 1387 .callback = disable_acpi_irq, 1388 .ident = "IBM Thinkpad 600 Series 2645", 1389 .matches = { 1390 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), 1391 DMI_MATCH(DMI_BOARD_NAME, "2645"), 1392 }, 1393 }, 1394 { 1395 .callback = disable_acpi_irq, 1396 .ident = "IBM Thinkpad 600 Series 2646", 1397 .matches = { 1398 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), 1399 DMI_MATCH(DMI_BOARD_NAME, "2646"), 1400 }, 1401 }, 1402 /* 1403 * Boxes that need ACPI PCI IRQ routing and PCI scan disabled 1404 */ 1405 { /* _BBN 0 bug */ 1406 .callback = disable_acpi_pci, 1407 .ident = "ASUS PR-DLS", 1408 .matches = { 1409 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."), 1410 DMI_MATCH(DMI_BOARD_NAME, "PR-DLS"), 1411 DMI_MATCH(DMI_BIOS_VERSION, 1412 "ASUS PR-DLS ACPI BIOS Revision 1010"), 1413 DMI_MATCH(DMI_BIOS_DATE, "03/21/2003") 1414 }, 1415 }, 1416 { 1417 .callback = disable_acpi_pci, 1418 .ident = "Acer TravelMate 36x Laptop", 1419 .matches = { 1420 DMI_MATCH(DMI_SYS_VENDOR, "Acer"), 1421 DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"), 1422 }, 1423 }, 1424 {} 1425 }; 1426 1427 /* second table for DMI checks that should run after early-quirks */ 1428 static struct dmi_system_id __initdata acpi_dmi_table_late[] = { 1429 /* 1430 * HP laptops which use a DSDT reporting as HP/SB400/10000, 1431 * which includes some code which overrides all temperature 1432 * trip points to 16C if the INTIN2 input of the I/O APIC 1433 * is enabled. This input is incorrectly designated the 1434 * ISA IRQ 0 via an interrupt source override even though 1435 * it is wired to the output of the master 8259A and INTIN0 1436 * is not connected at all. Force ignoring BIOS IRQ0 1437 * override in that cases. 1438 */ 1439 { 1440 .callback = dmi_ignore_irq0_timer_override, 1441 .ident = "HP nx6115 laptop", 1442 .matches = { 1443 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 1444 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6115"), 1445 }, 1446 }, 1447 { 1448 .callback = dmi_ignore_irq0_timer_override, 1449 .ident = "HP NX6125 laptop", 1450 .matches = { 1451 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 1452 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6125"), 1453 }, 1454 }, 1455 { 1456 .callback = dmi_ignore_irq0_timer_override, 1457 .ident = "HP NX6325 laptop", 1458 .matches = { 1459 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 1460 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6325"), 1461 }, 1462 }, 1463 { 1464 .callback = dmi_ignore_irq0_timer_override, 1465 .ident = "HP 6715b laptop", 1466 .matches = { 1467 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 1468 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq 6715b"), 1469 }, 1470 }, 1471 { 1472 .callback = dmi_ignore_irq0_timer_override, 1473 .ident = "FUJITSU SIEMENS", 1474 .matches = { 1475 DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"), 1476 DMI_MATCH(DMI_PRODUCT_NAME, "AMILO PRO V2030"), 1477 }, 1478 }, 1479 {} 1480 }; 1481 1482 /* 1483 * acpi_boot_table_init() and acpi_boot_init() 1484 * called from setup_arch(), always. 1485 * 1. checksums all tables 1486 * 2. enumerates lapics 1487 * 3. enumerates io-apics 1488 * 1489 * acpi_table_init() is separate to allow reading SRAT without 1490 * other side effects. 1491 * 1492 * side effects of acpi_boot_init: 1493 * acpi_lapic = 1 if LAPIC found 1494 * acpi_ioapic = 1 if IOAPIC found 1495 * if (acpi_lapic && acpi_ioapic) smp_found_config = 1; 1496 * if acpi_blacklisted() acpi_disabled = 1; 1497 * acpi_irq_model=... 1498 * ... 1499 */ 1500 1501 void __init acpi_boot_table_init(void) 1502 { 1503 dmi_check_system(acpi_dmi_table); 1504 1505 /* 1506 * If acpi_disabled, bail out 1507 */ 1508 if (acpi_disabled) 1509 return; 1510 1511 /* 1512 * Initialize the ACPI boot-time table parser. 1513 */ 1514 if (acpi_table_init()) { 1515 disable_acpi(); 1516 return; 1517 } 1518 1519 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf); 1520 1521 /* 1522 * blacklist may disable ACPI entirely 1523 */ 1524 if (acpi_blacklisted()) { 1525 if (acpi_force) { 1526 printk(KERN_WARNING PREFIX "acpi=force override\n"); 1527 } else { 1528 printk(KERN_WARNING PREFIX "Disabling ACPI support\n"); 1529 disable_acpi(); 1530 return; 1531 } 1532 } 1533 } 1534 1535 int __init early_acpi_boot_init(void) 1536 { 1537 /* 1538 * If acpi_disabled, bail out 1539 */ 1540 if (acpi_disabled) 1541 return 1; 1542 1543 /* 1544 * Process the Multiple APIC Description Table (MADT), if present 1545 */ 1546 early_acpi_process_madt(); 1547 1548 /* 1549 * Hardware-reduced ACPI mode initialization: 1550 */ 1551 acpi_reduced_hw_init(); 1552 1553 return 0; 1554 } 1555 1556 int __init acpi_boot_init(void) 1557 { 1558 /* those are executed after early-quirks are executed */ 1559 dmi_check_system(acpi_dmi_table_late); 1560 1561 /* 1562 * If acpi_disabled, bail out 1563 */ 1564 if (acpi_disabled) 1565 return 1; 1566 1567 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf); 1568 1569 /* 1570 * set sci_int and PM timer address 1571 */ 1572 acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt); 1573 1574 /* 1575 * Process the Multiple APIC Description Table (MADT), if present 1576 */ 1577 acpi_process_madt(); 1578 1579 acpi_table_parse(ACPI_SIG_HPET, acpi_parse_hpet); 1580 1581 if (!acpi_noirq) 1582 x86_init.pci.init = pci_acpi_init; 1583 1584 return 0; 1585 } 1586 1587 static int __init parse_acpi(char *arg) 1588 { 1589 if (!arg) 1590 return -EINVAL; 1591 1592 /* "acpi=off" disables both ACPI table parsing and interpreter */ 1593 if (strcmp(arg, "off") == 0) { 1594 disable_acpi(); 1595 } 1596 /* acpi=force to over-ride black-list */ 1597 else if (strcmp(arg, "force") == 0) { 1598 acpi_force = 1; 1599 acpi_disabled = 0; 1600 } 1601 /* acpi=strict disables out-of-spec workarounds */ 1602 else if (strcmp(arg, "strict") == 0) { 1603 acpi_strict = 1; 1604 } 1605 /* acpi=rsdt use RSDT instead of XSDT */ 1606 else if (strcmp(arg, "rsdt") == 0) { 1607 acpi_gbl_do_not_use_xsdt = TRUE; 1608 } 1609 /* "acpi=noirq" disables ACPI interrupt routing */ 1610 else if (strcmp(arg, "noirq") == 0) { 1611 acpi_noirq_set(); 1612 } 1613 /* "acpi=copy_dsdt" copys DSDT */ 1614 else if (strcmp(arg, "copy_dsdt") == 0) { 1615 acpi_gbl_copy_dsdt_locally = 1; 1616 } 1617 /* "acpi=nocmcff" disables FF mode for corrected errors */ 1618 else if (strcmp(arg, "nocmcff") == 0) { 1619 acpi_disable_cmcff = 1; 1620 } else { 1621 /* Core will printk when we return error. */ 1622 return -EINVAL; 1623 } 1624 return 0; 1625 } 1626 early_param("acpi", parse_acpi); 1627 1628 /* FIXME: Using pci= for an ACPI parameter is a travesty. */ 1629 static int __init parse_pci(char *arg) 1630 { 1631 if (arg && strcmp(arg, "noacpi") == 0) 1632 acpi_disable_pci(); 1633 return 0; 1634 } 1635 early_param("pci", parse_pci); 1636 1637 int __init acpi_mps_check(void) 1638 { 1639 #if defined(CONFIG_X86_LOCAL_APIC) && !defined(CONFIG_X86_MPPARSE) 1640 /* mptable code is not built-in*/ 1641 if (acpi_disabled || acpi_noirq) { 1642 printk(KERN_WARNING "MPS support code is not built-in.\n" 1643 "Using acpi=off or acpi=noirq or pci=noacpi " 1644 "may have problem\n"); 1645 return 1; 1646 } 1647 #endif 1648 return 0; 1649 } 1650 1651 #ifdef CONFIG_X86_IO_APIC 1652 static int __init parse_acpi_skip_timer_override(char *arg) 1653 { 1654 acpi_skip_timer_override = 1; 1655 return 0; 1656 } 1657 early_param("acpi_skip_timer_override", parse_acpi_skip_timer_override); 1658 1659 static int __init parse_acpi_use_timer_override(char *arg) 1660 { 1661 acpi_use_timer_override = 1; 1662 return 0; 1663 } 1664 early_param("acpi_use_timer_override", parse_acpi_use_timer_override); 1665 #endif /* CONFIG_X86_IO_APIC */ 1666 1667 static int __init setup_acpi_sci(char *s) 1668 { 1669 if (!s) 1670 return -EINVAL; 1671 if (!strcmp(s, "edge")) 1672 acpi_sci_flags = ACPI_MADT_TRIGGER_EDGE | 1673 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK); 1674 else if (!strcmp(s, "level")) 1675 acpi_sci_flags = ACPI_MADT_TRIGGER_LEVEL | 1676 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK); 1677 else if (!strcmp(s, "high")) 1678 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_HIGH | 1679 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK); 1680 else if (!strcmp(s, "low")) 1681 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_LOW | 1682 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK); 1683 else 1684 return -EINVAL; 1685 return 0; 1686 } 1687 early_param("acpi_sci", setup_acpi_sci); 1688 1689 int __acpi_acquire_global_lock(unsigned int *lock) 1690 { 1691 unsigned int old, new, val; 1692 do { 1693 old = *lock; 1694 new = (((old & ~0x3) + 2) + ((old >> 1) & 0x1)); 1695 val = cmpxchg(lock, old, new); 1696 } while (unlikely (val != old)); 1697 return (new < 3) ? -1 : 0; 1698 } 1699 1700 int __acpi_release_global_lock(unsigned int *lock) 1701 { 1702 unsigned int old, new, val; 1703 do { 1704 old = *lock; 1705 new = old & ~0x3; 1706 val = cmpxchg(lock, old, new); 1707 } while (unlikely (val != old)); 1708 return old & 0x1; 1709 } 1710 1711 void __init arch_reserve_mem_area(acpi_physical_address addr, size_t size) 1712 { 1713 e820_add_region(addr, size, E820_ACPI); 1714 update_e820(); 1715 } 1716