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/irqdomain.h> 35 #include <linux/slab.h> 36 #include <linux/bootmem.h> 37 #include <linux/ioport.h> 38 #include <linux/pci.h> 39 40 #include <asm/pci_x86.h> 41 #include <asm/pgtable.h> 42 #include <asm/io_apic.h> 43 #include <asm/apic.h> 44 #include <asm/io.h> 45 #include <asm/mpspec.h> 46 #include <asm/smp.h> 47 #include <asm/i8259.h> 48 49 #include "sleep.h" /* To include x86_acpi_suspend_lowlevel */ 50 static int __initdata acpi_force = 0; 51 int acpi_disabled; 52 EXPORT_SYMBOL(acpi_disabled); 53 54 #ifdef CONFIG_X86_64 55 # include <asm/proto.h> 56 #endif /* X86 */ 57 58 #define PREFIX "ACPI: " 59 60 int acpi_noirq; /* skip ACPI IRQ initialization */ 61 int acpi_pci_disabled; /* skip ACPI PCI scan and IRQ initialization */ 62 EXPORT_SYMBOL(acpi_pci_disabled); 63 64 int acpi_lapic; 65 int acpi_ioapic; 66 int acpi_strict; 67 int acpi_disable_cmcff; 68 69 u8 acpi_sci_flags __initdata; 70 int acpi_sci_override_gsi __initdata; 71 int acpi_skip_timer_override __initdata; 72 int acpi_use_timer_override __initdata; 73 int acpi_fix_pin2_polarity __initdata; 74 75 #ifdef CONFIG_X86_LOCAL_APIC 76 static u64 acpi_lapic_addr __initdata = APIC_DEFAULT_PHYS_BASE; 77 #endif 78 79 /* 80 * Locks related to IOAPIC hotplug 81 * Hotplug side: 82 * ->device_hotplug_lock 83 * ->acpi_ioapic_lock 84 * ->ioapic_lock 85 * Interrupt mapping side: 86 * ->acpi_ioapic_lock 87 * ->ioapic_mutex 88 * ->ioapic_lock 89 */ 90 static DEFINE_MUTEX(acpi_ioapic_lock); 91 92 /* -------------------------------------------------------------------------- 93 Boot-time Configuration 94 -------------------------------------------------------------------------- */ 95 96 /* 97 * The default interrupt routing model is PIC (8259). This gets 98 * overridden if IOAPICs are enumerated (below). 99 */ 100 enum acpi_irq_model_id acpi_irq_model = ACPI_IRQ_MODEL_PIC; 101 102 103 /* 104 * ISA irqs by default are the first 16 gsis but can be 105 * any gsi as specified by an interrupt source override. 106 */ 107 static u32 isa_irq_to_gsi[NR_IRQS_LEGACY] __read_mostly = { 108 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 109 }; 110 111 #define ACPI_INVALID_GSI INT_MIN 112 113 /* 114 * This is just a simple wrapper around early_ioremap(), 115 * with sanity checks for phys == 0 and size == 0. 116 */ 117 char *__init __acpi_map_table(unsigned long phys, unsigned long size) 118 { 119 120 if (!phys || !size) 121 return NULL; 122 123 return early_ioremap(phys, size); 124 } 125 126 void __init __acpi_unmap_table(char *map, unsigned long size) 127 { 128 if (!map || !size) 129 return; 130 131 early_iounmap(map, size); 132 } 133 134 #ifdef CONFIG_X86_LOCAL_APIC 135 static int __init acpi_parse_madt(struct acpi_table_header *table) 136 { 137 struct acpi_table_madt *madt = NULL; 138 139 if (!cpu_has_apic) 140 return -EINVAL; 141 142 madt = (struct acpi_table_madt *)table; 143 if (!madt) { 144 printk(KERN_WARNING PREFIX "Unable to map MADT\n"); 145 return -ENODEV; 146 } 147 148 if (madt->address) { 149 acpi_lapic_addr = (u64) madt->address; 150 151 printk(KERN_DEBUG PREFIX "Local APIC address 0x%08x\n", 152 madt->address); 153 } 154 155 default_acpi_madt_oem_check(madt->header.oem_id, 156 madt->header.oem_table_id); 157 158 return 0; 159 } 160 161 /** 162 * acpi_register_lapic - register a local apic and generates a logic cpu number 163 * @id: local apic id to register 164 * @enabled: this cpu is enabled or not 165 * 166 * Returns the logic cpu number which maps to the local apic 167 */ 168 static int acpi_register_lapic(int id, u8 enabled) 169 { 170 unsigned int ver = 0; 171 172 if (id >= MAX_LOCAL_APIC) { 173 printk(KERN_INFO PREFIX "skipped apicid that is too big\n"); 174 return -EINVAL; 175 } 176 177 if (!enabled) { 178 ++disabled_cpus; 179 return -EINVAL; 180 } 181 182 if (boot_cpu_physical_apicid != -1U) 183 ver = apic_version[boot_cpu_physical_apicid]; 184 185 return generic_processor_info(id, ver); 186 } 187 188 static int __init 189 acpi_parse_x2apic(struct acpi_subtable_header *header, const unsigned long end) 190 { 191 struct acpi_madt_local_x2apic *processor = NULL; 192 int apic_id; 193 u8 enabled; 194 195 processor = (struct acpi_madt_local_x2apic *)header; 196 197 if (BAD_MADT_ENTRY(processor, end)) 198 return -EINVAL; 199 200 acpi_table_print_madt_entry(header); 201 202 apic_id = processor->local_apic_id; 203 enabled = processor->lapic_flags & ACPI_MADT_ENABLED; 204 #ifdef CONFIG_X86_X2APIC 205 /* 206 * We need to register disabled CPU as well to permit 207 * counting disabled CPUs. This allows us to size 208 * cpus_possible_map more accurately, to permit 209 * to not preallocating memory for all NR_CPUS 210 * when we use CPU hotplug. 211 */ 212 if (!apic->apic_id_valid(apic_id) && enabled) 213 printk(KERN_WARNING PREFIX "x2apic entry ignored\n"); 214 else 215 acpi_register_lapic(apic_id, enabled); 216 #else 217 printk(KERN_WARNING PREFIX "x2apic entry ignored\n"); 218 #endif 219 220 return 0; 221 } 222 223 static int __init 224 acpi_parse_lapic(struct acpi_subtable_header * header, const unsigned long end) 225 { 226 struct acpi_madt_local_apic *processor = NULL; 227 228 processor = (struct acpi_madt_local_apic *)header; 229 230 if (BAD_MADT_ENTRY(processor, end)) 231 return -EINVAL; 232 233 acpi_table_print_madt_entry(header); 234 235 /* 236 * We need to register disabled CPU as well to permit 237 * counting disabled CPUs. This allows us to size 238 * cpus_possible_map more accurately, to permit 239 * to not preallocating memory for all NR_CPUS 240 * when we use CPU hotplug. 241 */ 242 acpi_register_lapic(processor->id, /* APIC ID */ 243 processor->lapic_flags & ACPI_MADT_ENABLED); 244 245 return 0; 246 } 247 248 static int __init 249 acpi_parse_sapic(struct acpi_subtable_header *header, const unsigned long end) 250 { 251 struct acpi_madt_local_sapic *processor = NULL; 252 253 processor = (struct acpi_madt_local_sapic *)header; 254 255 if (BAD_MADT_ENTRY(processor, end)) 256 return -EINVAL; 257 258 acpi_table_print_madt_entry(header); 259 260 acpi_register_lapic((processor->id << 8) | processor->eid,/* APIC ID */ 261 processor->lapic_flags & ACPI_MADT_ENABLED); 262 263 return 0; 264 } 265 266 static int __init 267 acpi_parse_lapic_addr_ovr(struct acpi_subtable_header * header, 268 const unsigned long end) 269 { 270 struct acpi_madt_local_apic_override *lapic_addr_ovr = NULL; 271 272 lapic_addr_ovr = (struct acpi_madt_local_apic_override *)header; 273 274 if (BAD_MADT_ENTRY(lapic_addr_ovr, end)) 275 return -EINVAL; 276 277 acpi_lapic_addr = lapic_addr_ovr->address; 278 279 return 0; 280 } 281 282 static int __init 283 acpi_parse_x2apic_nmi(struct acpi_subtable_header *header, 284 const unsigned long end) 285 { 286 struct acpi_madt_local_x2apic_nmi *x2apic_nmi = NULL; 287 288 x2apic_nmi = (struct acpi_madt_local_x2apic_nmi *)header; 289 290 if (BAD_MADT_ENTRY(x2apic_nmi, end)) 291 return -EINVAL; 292 293 acpi_table_print_madt_entry(header); 294 295 if (x2apic_nmi->lint != 1) 296 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n"); 297 298 return 0; 299 } 300 301 static int __init 302 acpi_parse_lapic_nmi(struct acpi_subtable_header * header, const unsigned long end) 303 { 304 struct acpi_madt_local_apic_nmi *lapic_nmi = NULL; 305 306 lapic_nmi = (struct acpi_madt_local_apic_nmi *)header; 307 308 if (BAD_MADT_ENTRY(lapic_nmi, end)) 309 return -EINVAL; 310 311 acpi_table_print_madt_entry(header); 312 313 if (lapic_nmi->lint != 1) 314 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n"); 315 316 return 0; 317 } 318 319 #endif /*CONFIG_X86_LOCAL_APIC */ 320 321 #ifdef CONFIG_X86_IO_APIC 322 #define MP_ISA_BUS 0 323 324 static void __init mp_override_legacy_irq(u8 bus_irq, u8 polarity, u8 trigger, 325 u32 gsi) 326 { 327 int ioapic; 328 int pin; 329 struct mpc_intsrc mp_irq; 330 331 /* 332 * Convert 'gsi' to 'ioapic.pin'. 333 */ 334 ioapic = mp_find_ioapic(gsi); 335 if (ioapic < 0) 336 return; 337 pin = mp_find_ioapic_pin(ioapic, gsi); 338 339 /* 340 * TBD: This check is for faulty timer entries, where the override 341 * erroneously sets the trigger to level, resulting in a HUGE 342 * increase of timer interrupts! 343 */ 344 if ((bus_irq == 0) && (trigger == 3)) 345 trigger = 1; 346 347 mp_irq.type = MP_INTSRC; 348 mp_irq.irqtype = mp_INT; 349 mp_irq.irqflag = (trigger << 2) | polarity; 350 mp_irq.srcbus = MP_ISA_BUS; 351 mp_irq.srcbusirq = bus_irq; /* IRQ */ 352 mp_irq.dstapic = mpc_ioapic_id(ioapic); /* APIC ID */ 353 mp_irq.dstirq = pin; /* INTIN# */ 354 355 mp_save_irq(&mp_irq); 356 357 /* 358 * Reset default identity mapping if gsi is also an legacy IRQ, 359 * otherwise there will be more than one entry with the same GSI 360 * and acpi_isa_irq_to_gsi() may give wrong result. 361 */ 362 if (gsi < nr_legacy_irqs() && isa_irq_to_gsi[gsi] == gsi) 363 isa_irq_to_gsi[gsi] = ACPI_INVALID_GSI; 364 isa_irq_to_gsi[bus_irq] = gsi; 365 } 366 367 static int mp_config_acpi_gsi(struct device *dev, u32 gsi, int trigger, 368 int polarity) 369 { 370 #ifdef CONFIG_X86_MPPARSE 371 struct mpc_intsrc mp_irq; 372 struct pci_dev *pdev; 373 unsigned char number; 374 unsigned int devfn; 375 int ioapic; 376 u8 pin; 377 378 if (!acpi_ioapic) 379 return 0; 380 if (!dev || !dev_is_pci(dev)) 381 return 0; 382 383 pdev = to_pci_dev(dev); 384 number = pdev->bus->number; 385 devfn = pdev->devfn; 386 pin = pdev->pin; 387 /* print the entry should happen on mptable identically */ 388 mp_irq.type = MP_INTSRC; 389 mp_irq.irqtype = mp_INT; 390 mp_irq.irqflag = (trigger == ACPI_EDGE_SENSITIVE ? 4 : 0x0c) | 391 (polarity == ACPI_ACTIVE_HIGH ? 1 : 3); 392 mp_irq.srcbus = number; 393 mp_irq.srcbusirq = (((devfn >> 3) & 0x1f) << 2) | ((pin - 1) & 3); 394 ioapic = mp_find_ioapic(gsi); 395 mp_irq.dstapic = mpc_ioapic_id(ioapic); 396 mp_irq.dstirq = mp_find_ioapic_pin(ioapic, gsi); 397 398 mp_save_irq(&mp_irq); 399 #endif 400 return 0; 401 } 402 403 static int mp_register_gsi(struct device *dev, u32 gsi, int trigger, 404 int polarity) 405 { 406 int irq, node; 407 408 if (acpi_irq_model != ACPI_IRQ_MODEL_IOAPIC) 409 return gsi; 410 411 trigger = trigger == ACPI_EDGE_SENSITIVE ? 0 : 1; 412 polarity = polarity == ACPI_ACTIVE_HIGH ? 0 : 1; 413 node = dev ? dev_to_node(dev) : NUMA_NO_NODE; 414 if (mp_set_gsi_attr(gsi, trigger, polarity, node)) { 415 pr_warn("Failed to set pin attr for GSI%d\n", gsi); 416 return -1; 417 } 418 419 irq = mp_map_gsi_to_irq(gsi, IOAPIC_MAP_ALLOC); 420 if (irq < 0) 421 return irq; 422 423 /* Don't set up the ACPI SCI because it's already set up */ 424 if (enable_update_mptable && acpi_gbl_FADT.sci_interrupt != gsi) 425 mp_config_acpi_gsi(dev, gsi, trigger, polarity); 426 427 return irq; 428 } 429 430 static void mp_unregister_gsi(u32 gsi) 431 { 432 int irq; 433 434 if (acpi_irq_model != ACPI_IRQ_MODEL_IOAPIC) 435 return; 436 437 irq = mp_map_gsi_to_irq(gsi, 0); 438 if (irq > 0) 439 mp_unmap_irq(irq); 440 } 441 442 static struct irq_domain_ops acpi_irqdomain_ops = { 443 .map = mp_irqdomain_map, 444 .unmap = mp_irqdomain_unmap, 445 }; 446 447 static int __init 448 acpi_parse_ioapic(struct acpi_subtable_header * header, const unsigned long end) 449 { 450 struct acpi_madt_io_apic *ioapic = NULL; 451 struct ioapic_domain_cfg cfg = { 452 .type = IOAPIC_DOMAIN_DYNAMIC, 453 .ops = &acpi_irqdomain_ops, 454 }; 455 456 ioapic = (struct acpi_madt_io_apic *)header; 457 458 if (BAD_MADT_ENTRY(ioapic, end)) 459 return -EINVAL; 460 461 acpi_table_print_madt_entry(header); 462 463 /* Statically assign IRQ numbers for IOAPICs hosting legacy IRQs */ 464 if (ioapic->global_irq_base < nr_legacy_irqs()) 465 cfg.type = IOAPIC_DOMAIN_LEGACY; 466 467 mp_register_ioapic(ioapic->id, ioapic->address, ioapic->global_irq_base, 468 &cfg); 469 470 return 0; 471 } 472 473 /* 474 * Parse Interrupt Source Override for the ACPI SCI 475 */ 476 static void __init acpi_sci_ioapic_setup(u8 bus_irq, u16 polarity, u16 trigger, u32 gsi) 477 { 478 if (trigger == 0) /* compatible SCI trigger is level */ 479 trigger = 3; 480 481 if (polarity == 0) /* compatible SCI polarity is low */ 482 polarity = 3; 483 484 /* Command-line over-ride via acpi_sci= */ 485 if (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) 486 trigger = (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2; 487 488 if (acpi_sci_flags & ACPI_MADT_POLARITY_MASK) 489 polarity = acpi_sci_flags & ACPI_MADT_POLARITY_MASK; 490 491 mp_override_legacy_irq(bus_irq, polarity, trigger, gsi); 492 493 /* 494 * stash over-ride to indicate we've been here 495 * and for later update of acpi_gbl_FADT 496 */ 497 acpi_sci_override_gsi = gsi; 498 return; 499 } 500 501 static int __init 502 acpi_parse_int_src_ovr(struct acpi_subtable_header * header, 503 const unsigned long end) 504 { 505 struct acpi_madt_interrupt_override *intsrc = NULL; 506 507 intsrc = (struct acpi_madt_interrupt_override *)header; 508 509 if (BAD_MADT_ENTRY(intsrc, end)) 510 return -EINVAL; 511 512 acpi_table_print_madt_entry(header); 513 514 if (intsrc->source_irq == acpi_gbl_FADT.sci_interrupt) { 515 acpi_sci_ioapic_setup(intsrc->source_irq, 516 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK, 517 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2, 518 intsrc->global_irq); 519 return 0; 520 } 521 522 if (intsrc->source_irq == 0) { 523 if (acpi_skip_timer_override) { 524 printk(PREFIX "BIOS IRQ0 override ignored.\n"); 525 return 0; 526 } 527 528 if ((intsrc->global_irq == 2) && acpi_fix_pin2_polarity 529 && (intsrc->inti_flags & ACPI_MADT_POLARITY_MASK)) { 530 intsrc->inti_flags &= ~ACPI_MADT_POLARITY_MASK; 531 printk(PREFIX "BIOS IRQ0 pin2 override: forcing polarity to high active.\n"); 532 } 533 } 534 535 mp_override_legacy_irq(intsrc->source_irq, 536 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK, 537 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2, 538 intsrc->global_irq); 539 540 return 0; 541 } 542 543 static int __init 544 acpi_parse_nmi_src(struct acpi_subtable_header * header, const unsigned long end) 545 { 546 struct acpi_madt_nmi_source *nmi_src = NULL; 547 548 nmi_src = (struct acpi_madt_nmi_source *)header; 549 550 if (BAD_MADT_ENTRY(nmi_src, end)) 551 return -EINVAL; 552 553 acpi_table_print_madt_entry(header); 554 555 /* TBD: Support nimsrc entries? */ 556 557 return 0; 558 } 559 560 #endif /* CONFIG_X86_IO_APIC */ 561 562 /* 563 * acpi_pic_sci_set_trigger() 564 * 565 * use ELCR to set PIC-mode trigger type for SCI 566 * 567 * If a PIC-mode SCI is not recognized or gives spurious IRQ7's 568 * it may require Edge Trigger -- use "acpi_sci=edge" 569 * 570 * Port 0x4d0-4d1 are ECLR1 and ECLR2, the Edge/Level Control Registers 571 * for the 8259 PIC. bit[n] = 1 means irq[n] is Level, otherwise Edge. 572 * ECLR1 is IRQs 0-7 (IRQ 0, 1, 2 must be 0) 573 * ECLR2 is IRQs 8-15 (IRQ 8, 13 must be 0) 574 */ 575 576 void __init acpi_pic_sci_set_trigger(unsigned int irq, u16 trigger) 577 { 578 unsigned int mask = 1 << irq; 579 unsigned int old, new; 580 581 /* Real old ELCR mask */ 582 old = inb(0x4d0) | (inb(0x4d1) << 8); 583 584 /* 585 * If we use ACPI to set PCI IRQs, then we should clear ELCR 586 * since we will set it correctly as we enable the PCI irq 587 * routing. 588 */ 589 new = acpi_noirq ? old : 0; 590 591 /* 592 * Update SCI information in the ELCR, it isn't in the PCI 593 * routing tables.. 594 */ 595 switch (trigger) { 596 case 1: /* Edge - clear */ 597 new &= ~mask; 598 break; 599 case 3: /* Level - set */ 600 new |= mask; 601 break; 602 } 603 604 if (old == new) 605 return; 606 607 printk(PREFIX "setting ELCR to %04x (from %04x)\n", new, old); 608 outb(new, 0x4d0); 609 outb(new >> 8, 0x4d1); 610 } 611 612 int acpi_gsi_to_irq(u32 gsi, unsigned int *irqp) 613 { 614 int rc, irq, trigger, polarity; 615 616 if (acpi_irq_model == ACPI_IRQ_MODEL_PIC) { 617 *irqp = gsi; 618 return 0; 619 } 620 621 rc = acpi_get_override_irq(gsi, &trigger, &polarity); 622 if (rc == 0) { 623 trigger = trigger ? ACPI_LEVEL_SENSITIVE : ACPI_EDGE_SENSITIVE; 624 polarity = polarity ? ACPI_ACTIVE_LOW : ACPI_ACTIVE_HIGH; 625 irq = acpi_register_gsi(NULL, gsi, trigger, polarity); 626 if (irq >= 0) { 627 *irqp = irq; 628 return 0; 629 } 630 } 631 632 return -1; 633 } 634 EXPORT_SYMBOL_GPL(acpi_gsi_to_irq); 635 636 int acpi_isa_irq_to_gsi(unsigned isa_irq, u32 *gsi) 637 { 638 if (isa_irq < nr_legacy_irqs() && 639 isa_irq_to_gsi[isa_irq] != ACPI_INVALID_GSI) { 640 *gsi = isa_irq_to_gsi[isa_irq]; 641 return 0; 642 } 643 644 return -1; 645 } 646 647 static int acpi_register_gsi_pic(struct device *dev, u32 gsi, 648 int trigger, int polarity) 649 { 650 #ifdef CONFIG_PCI 651 /* 652 * Make sure all (legacy) PCI IRQs are set as level-triggered. 653 */ 654 if (trigger == ACPI_LEVEL_SENSITIVE) 655 eisa_set_level_irq(gsi); 656 #endif 657 658 return gsi; 659 } 660 661 #ifdef CONFIG_X86_LOCAL_APIC 662 static int acpi_register_gsi_ioapic(struct device *dev, u32 gsi, 663 int trigger, int polarity) 664 { 665 int irq = gsi; 666 667 #ifdef CONFIG_X86_IO_APIC 668 mutex_lock(&acpi_ioapic_lock); 669 irq = mp_register_gsi(dev, gsi, trigger, polarity); 670 mutex_unlock(&acpi_ioapic_lock); 671 #endif 672 673 return irq; 674 } 675 676 static void acpi_unregister_gsi_ioapic(u32 gsi) 677 { 678 #ifdef CONFIG_X86_IO_APIC 679 mutex_lock(&acpi_ioapic_lock); 680 mp_unregister_gsi(gsi); 681 mutex_unlock(&acpi_ioapic_lock); 682 #endif 683 } 684 #endif 685 686 int (*__acpi_register_gsi)(struct device *dev, u32 gsi, 687 int trigger, int polarity) = acpi_register_gsi_pic; 688 void (*__acpi_unregister_gsi)(u32 gsi) = NULL; 689 690 #ifdef CONFIG_ACPI_SLEEP 691 int (*acpi_suspend_lowlevel)(void) = x86_acpi_suspend_lowlevel; 692 #else 693 int (*acpi_suspend_lowlevel)(void); 694 #endif 695 696 /* 697 * success: return IRQ number (>=0) 698 * failure: return < 0 699 */ 700 int acpi_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity) 701 { 702 return __acpi_register_gsi(dev, gsi, trigger, polarity); 703 } 704 EXPORT_SYMBOL_GPL(acpi_register_gsi); 705 706 void acpi_unregister_gsi(u32 gsi) 707 { 708 if (__acpi_unregister_gsi) 709 __acpi_unregister_gsi(gsi); 710 } 711 EXPORT_SYMBOL_GPL(acpi_unregister_gsi); 712 713 #ifdef CONFIG_X86_LOCAL_APIC 714 static void __init acpi_set_irq_model_ioapic(void) 715 { 716 acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC; 717 __acpi_register_gsi = acpi_register_gsi_ioapic; 718 __acpi_unregister_gsi = acpi_unregister_gsi_ioapic; 719 acpi_ioapic = 1; 720 } 721 #endif 722 723 /* 724 * ACPI based hotplug support for CPU 725 */ 726 #ifdef CONFIG_ACPI_HOTPLUG_CPU 727 #include <acpi/processor.h> 728 729 static void acpi_map_cpu2node(acpi_handle handle, int cpu, int physid) 730 { 731 #ifdef CONFIG_ACPI_NUMA 732 int nid; 733 734 nid = acpi_get_node(handle); 735 if (nid != -1) { 736 set_apicid_to_node(physid, nid); 737 numa_set_node(cpu, nid); 738 } 739 #endif 740 } 741 742 static int _acpi_map_lsapic(acpi_handle handle, int physid, int *pcpu) 743 { 744 int cpu; 745 746 cpu = acpi_register_lapic(physid, ACPI_MADT_ENABLED); 747 if (cpu < 0) { 748 pr_info(PREFIX "Unable to map lapic to logical cpu number\n"); 749 return cpu; 750 } 751 752 acpi_processor_set_pdc(handle); 753 acpi_map_cpu2node(handle, cpu, physid); 754 755 *pcpu = cpu; 756 return 0; 757 } 758 759 /* wrapper to silence section mismatch warning */ 760 int __ref acpi_map_cpu(acpi_handle handle, phys_cpuid_t physid, int *pcpu) 761 { 762 return _acpi_map_lsapic(handle, physid, pcpu); 763 } 764 EXPORT_SYMBOL(acpi_map_cpu); 765 766 int acpi_unmap_cpu(int cpu) 767 { 768 #ifdef CONFIG_ACPI_NUMA 769 set_apicid_to_node(per_cpu(x86_cpu_to_apicid, cpu), NUMA_NO_NODE); 770 #endif 771 772 per_cpu(x86_cpu_to_apicid, cpu) = -1; 773 set_cpu_present(cpu, false); 774 num_processors--; 775 776 return (0); 777 } 778 EXPORT_SYMBOL(acpi_unmap_cpu); 779 #endif /* CONFIG_ACPI_HOTPLUG_CPU */ 780 781 int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base) 782 { 783 int ret = -ENOSYS; 784 #ifdef CONFIG_ACPI_HOTPLUG_IOAPIC 785 int ioapic_id; 786 u64 addr; 787 struct ioapic_domain_cfg cfg = { 788 .type = IOAPIC_DOMAIN_DYNAMIC, 789 .ops = &acpi_irqdomain_ops, 790 }; 791 792 ioapic_id = acpi_get_ioapic_id(handle, gsi_base, &addr); 793 if (ioapic_id < 0) { 794 unsigned long long uid; 795 acpi_status status; 796 797 status = acpi_evaluate_integer(handle, METHOD_NAME__UID, 798 NULL, &uid); 799 if (ACPI_FAILURE(status)) { 800 acpi_handle_warn(handle, "failed to get IOAPIC ID.\n"); 801 return -EINVAL; 802 } 803 ioapic_id = (int)uid; 804 } 805 806 mutex_lock(&acpi_ioapic_lock); 807 ret = mp_register_ioapic(ioapic_id, phys_addr, gsi_base, &cfg); 808 mutex_unlock(&acpi_ioapic_lock); 809 #endif 810 811 return ret; 812 } 813 EXPORT_SYMBOL(acpi_register_ioapic); 814 815 int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base) 816 { 817 int ret = -ENOSYS; 818 819 #ifdef CONFIG_ACPI_HOTPLUG_IOAPIC 820 mutex_lock(&acpi_ioapic_lock); 821 ret = mp_unregister_ioapic(gsi_base); 822 mutex_unlock(&acpi_ioapic_lock); 823 #endif 824 825 return ret; 826 } 827 EXPORT_SYMBOL(acpi_unregister_ioapic); 828 829 /** 830 * acpi_ioapic_registered - Check whether IOAPIC assoicatied with @gsi_base 831 * has been registered 832 * @handle: ACPI handle of the IOAPIC deivce 833 * @gsi_base: GSI base associated with the IOAPIC 834 * 835 * Assume caller holds some type of lock to serialize acpi_ioapic_registered() 836 * with acpi_register_ioapic()/acpi_unregister_ioapic(). 837 */ 838 int acpi_ioapic_registered(acpi_handle handle, u32 gsi_base) 839 { 840 int ret = 0; 841 842 #ifdef CONFIG_ACPI_HOTPLUG_IOAPIC 843 mutex_lock(&acpi_ioapic_lock); 844 ret = mp_ioapic_registered(gsi_base); 845 mutex_unlock(&acpi_ioapic_lock); 846 #endif 847 848 return ret; 849 } 850 851 static int __init acpi_parse_sbf(struct acpi_table_header *table) 852 { 853 struct acpi_table_boot *sb = (struct acpi_table_boot *)table; 854 855 sbf_port = sb->cmos_index; /* Save CMOS port */ 856 857 return 0; 858 } 859 860 #ifdef CONFIG_HPET_TIMER 861 #include <asm/hpet.h> 862 863 static struct resource *hpet_res __initdata; 864 865 static int __init acpi_parse_hpet(struct acpi_table_header *table) 866 { 867 struct acpi_table_hpet *hpet_tbl = (struct acpi_table_hpet *)table; 868 869 if (hpet_tbl->address.space_id != ACPI_SPACE_MEM) { 870 printk(KERN_WARNING PREFIX "HPET timers must be located in " 871 "memory.\n"); 872 return -1; 873 } 874 875 hpet_address = hpet_tbl->address.address; 876 hpet_blockid = hpet_tbl->sequence; 877 878 /* 879 * Some broken BIOSes advertise HPET at 0x0. We really do not 880 * want to allocate a resource there. 881 */ 882 if (!hpet_address) { 883 printk(KERN_WARNING PREFIX 884 "HPET id: %#x base: %#lx is invalid\n", 885 hpet_tbl->id, hpet_address); 886 return 0; 887 } 888 #ifdef CONFIG_X86_64 889 /* 890 * Some even more broken BIOSes advertise HPET at 891 * 0xfed0000000000000 instead of 0xfed00000. Fix it up and add 892 * some noise: 893 */ 894 if (hpet_address == 0xfed0000000000000UL) { 895 if (!hpet_force_user) { 896 printk(KERN_WARNING PREFIX "HPET id: %#x " 897 "base: 0xfed0000000000000 is bogus\n " 898 "try hpet=force on the kernel command line to " 899 "fix it up to 0xfed00000.\n", hpet_tbl->id); 900 hpet_address = 0; 901 return 0; 902 } 903 printk(KERN_WARNING PREFIX 904 "HPET id: %#x base: 0xfed0000000000000 fixed up " 905 "to 0xfed00000.\n", hpet_tbl->id); 906 hpet_address >>= 32; 907 } 908 #endif 909 printk(KERN_INFO PREFIX "HPET id: %#x base: %#lx\n", 910 hpet_tbl->id, hpet_address); 911 912 /* 913 * Allocate and initialize the HPET firmware resource for adding into 914 * the resource tree during the lateinit timeframe. 915 */ 916 #define HPET_RESOURCE_NAME_SIZE 9 917 hpet_res = alloc_bootmem(sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE); 918 919 hpet_res->name = (void *)&hpet_res[1]; 920 hpet_res->flags = IORESOURCE_MEM; 921 snprintf((char *)hpet_res->name, HPET_RESOURCE_NAME_SIZE, "HPET %u", 922 hpet_tbl->sequence); 923 924 hpet_res->start = hpet_address; 925 hpet_res->end = hpet_address + (1 * 1024) - 1; 926 927 return 0; 928 } 929 930 /* 931 * hpet_insert_resource inserts the HPET resources used into the resource 932 * tree. 933 */ 934 static __init int hpet_insert_resource(void) 935 { 936 if (!hpet_res) 937 return 1; 938 939 return insert_resource(&iomem_resource, hpet_res); 940 } 941 942 late_initcall(hpet_insert_resource); 943 944 #else 945 #define acpi_parse_hpet NULL 946 #endif 947 948 static int __init acpi_parse_fadt(struct acpi_table_header *table) 949 { 950 951 #ifdef CONFIG_X86_PM_TIMER 952 /* detect the location of the ACPI PM Timer */ 953 if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID) { 954 /* FADT rev. 2 */ 955 if (acpi_gbl_FADT.xpm_timer_block.space_id != 956 ACPI_ADR_SPACE_SYSTEM_IO) 957 return 0; 958 959 pmtmr_ioport = acpi_gbl_FADT.xpm_timer_block.address; 960 /* 961 * "X" fields are optional extensions to the original V1.0 962 * fields, so we must selectively expand V1.0 fields if the 963 * corresponding X field is zero. 964 */ 965 if (!pmtmr_ioport) 966 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block; 967 } else { 968 /* FADT rev. 1 */ 969 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block; 970 } 971 if (pmtmr_ioport) 972 printk(KERN_INFO PREFIX "PM-Timer IO Port: %#x\n", 973 pmtmr_ioport); 974 #endif 975 return 0; 976 } 977 978 #ifdef CONFIG_X86_LOCAL_APIC 979 /* 980 * Parse LAPIC entries in MADT 981 * returns 0 on success, < 0 on error 982 */ 983 984 static int __init early_acpi_parse_madt_lapic_addr_ovr(void) 985 { 986 int count; 987 988 if (!cpu_has_apic) 989 return -ENODEV; 990 991 /* 992 * Note that the LAPIC address is obtained from the MADT (32-bit value) 993 * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value). 994 */ 995 996 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE, 997 acpi_parse_lapic_addr_ovr, 0); 998 if (count < 0) { 999 printk(KERN_ERR PREFIX 1000 "Error parsing LAPIC address override entry\n"); 1001 return count; 1002 } 1003 1004 register_lapic_address(acpi_lapic_addr); 1005 1006 return count; 1007 } 1008 1009 static int __init acpi_parse_madt_lapic_entries(void) 1010 { 1011 int count; 1012 int x2count = 0; 1013 1014 if (!cpu_has_apic) 1015 return -ENODEV; 1016 1017 /* 1018 * Note that the LAPIC address is obtained from the MADT (32-bit value) 1019 * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value). 1020 */ 1021 1022 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE, 1023 acpi_parse_lapic_addr_ovr, 0); 1024 if (count < 0) { 1025 printk(KERN_ERR PREFIX 1026 "Error parsing LAPIC address override entry\n"); 1027 return count; 1028 } 1029 1030 register_lapic_address(acpi_lapic_addr); 1031 1032 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC, 1033 acpi_parse_sapic, MAX_LOCAL_APIC); 1034 1035 if (!count) { 1036 x2count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC, 1037 acpi_parse_x2apic, MAX_LOCAL_APIC); 1038 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC, 1039 acpi_parse_lapic, MAX_LOCAL_APIC); 1040 } 1041 if (!count && !x2count) { 1042 printk(KERN_ERR PREFIX "No LAPIC entries present\n"); 1043 /* TBD: Cleanup to allow fallback to MPS */ 1044 return -ENODEV; 1045 } else if (count < 0 || x2count < 0) { 1046 printk(KERN_ERR PREFIX "Error parsing LAPIC entry\n"); 1047 /* TBD: Cleanup to allow fallback to MPS */ 1048 return count; 1049 } 1050 1051 x2count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC_NMI, 1052 acpi_parse_x2apic_nmi, 0); 1053 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI, 1054 acpi_parse_lapic_nmi, 0); 1055 if (count < 0 || x2count < 0) { 1056 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n"); 1057 /* TBD: Cleanup to allow fallback to MPS */ 1058 return count; 1059 } 1060 return 0; 1061 } 1062 #endif /* CONFIG_X86_LOCAL_APIC */ 1063 1064 #ifdef CONFIG_X86_IO_APIC 1065 static void __init mp_config_acpi_legacy_irqs(void) 1066 { 1067 int i; 1068 struct mpc_intsrc mp_irq; 1069 1070 #ifdef CONFIG_EISA 1071 /* 1072 * Fabricate the legacy ISA bus (bus #31). 1073 */ 1074 mp_bus_id_to_type[MP_ISA_BUS] = MP_BUS_ISA; 1075 #endif 1076 set_bit(MP_ISA_BUS, mp_bus_not_pci); 1077 pr_debug("Bus #%d is ISA\n", MP_ISA_BUS); 1078 1079 /* 1080 * Use the default configuration for the IRQs 0-15. Unless 1081 * overridden by (MADT) interrupt source override entries. 1082 */ 1083 for (i = 0; i < nr_legacy_irqs(); i++) { 1084 int ioapic, pin; 1085 unsigned int dstapic; 1086 int idx; 1087 u32 gsi; 1088 1089 /* Locate the gsi that irq i maps to. */ 1090 if (acpi_isa_irq_to_gsi(i, &gsi)) 1091 continue; 1092 1093 /* 1094 * Locate the IOAPIC that manages the ISA IRQ. 1095 */ 1096 ioapic = mp_find_ioapic(gsi); 1097 if (ioapic < 0) 1098 continue; 1099 pin = mp_find_ioapic_pin(ioapic, gsi); 1100 dstapic = mpc_ioapic_id(ioapic); 1101 1102 for (idx = 0; idx < mp_irq_entries; idx++) { 1103 struct mpc_intsrc *irq = mp_irqs + idx; 1104 1105 /* Do we already have a mapping for this ISA IRQ? */ 1106 if (irq->srcbus == MP_ISA_BUS && irq->srcbusirq == i) 1107 break; 1108 1109 /* Do we already have a mapping for this IOAPIC pin */ 1110 if (irq->dstapic == dstapic && irq->dstirq == pin) 1111 break; 1112 } 1113 1114 if (idx != mp_irq_entries) { 1115 printk(KERN_DEBUG "ACPI: IRQ%d used by override.\n", i); 1116 continue; /* IRQ already used */ 1117 } 1118 1119 mp_irq.type = MP_INTSRC; 1120 mp_irq.irqflag = 0; /* Conforming */ 1121 mp_irq.srcbus = MP_ISA_BUS; 1122 mp_irq.dstapic = dstapic; 1123 mp_irq.irqtype = mp_INT; 1124 mp_irq.srcbusirq = i; /* Identity mapped */ 1125 mp_irq.dstirq = pin; 1126 1127 mp_save_irq(&mp_irq); 1128 } 1129 } 1130 1131 /* 1132 * Parse IOAPIC related entries in MADT 1133 * returns 0 on success, < 0 on error 1134 */ 1135 static int __init acpi_parse_madt_ioapic_entries(void) 1136 { 1137 int count; 1138 1139 /* 1140 * ACPI interpreter is required to complete interrupt setup, 1141 * so if it is off, don't enumerate the io-apics with ACPI. 1142 * If MPS is present, it will handle them, 1143 * otherwise the system will stay in PIC mode 1144 */ 1145 if (acpi_disabled || acpi_noirq) 1146 return -ENODEV; 1147 1148 if (!cpu_has_apic) 1149 return -ENODEV; 1150 1151 /* 1152 * if "noapic" boot option, don't look for IO-APICs 1153 */ 1154 if (skip_ioapic_setup) { 1155 printk(KERN_INFO PREFIX "Skipping IOAPIC probe " 1156 "due to 'noapic' option.\n"); 1157 return -ENODEV; 1158 } 1159 1160 count = acpi_table_parse_madt(ACPI_MADT_TYPE_IO_APIC, acpi_parse_ioapic, 1161 MAX_IO_APICS); 1162 if (!count) { 1163 printk(KERN_ERR PREFIX "No IOAPIC entries present\n"); 1164 return -ENODEV; 1165 } else if (count < 0) { 1166 printk(KERN_ERR PREFIX "Error parsing IOAPIC entry\n"); 1167 return count; 1168 } 1169 1170 count = acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE, 1171 acpi_parse_int_src_ovr, nr_irqs); 1172 if (count < 0) { 1173 printk(KERN_ERR PREFIX 1174 "Error parsing interrupt source overrides entry\n"); 1175 /* TBD: Cleanup to allow fallback to MPS */ 1176 return count; 1177 } 1178 1179 /* 1180 * If BIOS did not supply an INT_SRC_OVR for the SCI 1181 * pretend we got one so we can set the SCI flags. 1182 */ 1183 if (!acpi_sci_override_gsi) 1184 acpi_sci_ioapic_setup(acpi_gbl_FADT.sci_interrupt, 0, 0, 1185 acpi_gbl_FADT.sci_interrupt); 1186 1187 /* Fill in identity legacy mappings where no override */ 1188 mp_config_acpi_legacy_irqs(); 1189 1190 count = acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE, 1191 acpi_parse_nmi_src, nr_irqs); 1192 if (count < 0) { 1193 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n"); 1194 /* TBD: Cleanup to allow fallback to MPS */ 1195 return count; 1196 } 1197 1198 return 0; 1199 } 1200 #else 1201 static inline int acpi_parse_madt_ioapic_entries(void) 1202 { 1203 return -1; 1204 } 1205 #endif /* !CONFIG_X86_IO_APIC */ 1206 1207 static void __init early_acpi_process_madt(void) 1208 { 1209 #ifdef CONFIG_X86_LOCAL_APIC 1210 int error; 1211 1212 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) { 1213 1214 /* 1215 * Parse MADT LAPIC entries 1216 */ 1217 error = early_acpi_parse_madt_lapic_addr_ovr(); 1218 if (!error) { 1219 acpi_lapic = 1; 1220 smp_found_config = 1; 1221 } 1222 if (error == -EINVAL) { 1223 /* 1224 * Dell Precision Workstation 410, 610 come here. 1225 */ 1226 printk(KERN_ERR PREFIX 1227 "Invalid BIOS MADT, disabling ACPI\n"); 1228 disable_acpi(); 1229 } 1230 } 1231 #endif 1232 } 1233 1234 static void __init acpi_process_madt(void) 1235 { 1236 #ifdef CONFIG_X86_LOCAL_APIC 1237 int error; 1238 1239 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) { 1240 1241 /* 1242 * Parse MADT LAPIC entries 1243 */ 1244 error = acpi_parse_madt_lapic_entries(); 1245 if (!error) { 1246 acpi_lapic = 1; 1247 1248 /* 1249 * Parse MADT IO-APIC entries 1250 */ 1251 mutex_lock(&acpi_ioapic_lock); 1252 error = acpi_parse_madt_ioapic_entries(); 1253 mutex_unlock(&acpi_ioapic_lock); 1254 if (!error) { 1255 acpi_set_irq_model_ioapic(); 1256 1257 smp_found_config = 1; 1258 } 1259 } 1260 if (error == -EINVAL) { 1261 /* 1262 * Dell Precision Workstation 410, 610 come here. 1263 */ 1264 printk(KERN_ERR PREFIX 1265 "Invalid BIOS MADT, disabling ACPI\n"); 1266 disable_acpi(); 1267 } 1268 } else { 1269 /* 1270 * ACPI found no MADT, and so ACPI wants UP PIC mode. 1271 * In the event an MPS table was found, forget it. 1272 * Boot with "acpi=off" to use MPS on such a system. 1273 */ 1274 if (smp_found_config) { 1275 printk(KERN_WARNING PREFIX 1276 "No APIC-table, disabling MPS\n"); 1277 smp_found_config = 0; 1278 } 1279 } 1280 1281 /* 1282 * ACPI supports both logical (e.g. Hyper-Threading) and physical 1283 * processors, where MPS only supports physical. 1284 */ 1285 if (acpi_lapic && acpi_ioapic) 1286 printk(KERN_INFO "Using ACPI (MADT) for SMP configuration " 1287 "information\n"); 1288 else if (acpi_lapic) 1289 printk(KERN_INFO "Using ACPI for processor (LAPIC) " 1290 "configuration information\n"); 1291 #endif 1292 return; 1293 } 1294 1295 static int __init disable_acpi_irq(const struct dmi_system_id *d) 1296 { 1297 if (!acpi_force) { 1298 printk(KERN_NOTICE "%s detected: force use of acpi=noirq\n", 1299 d->ident); 1300 acpi_noirq_set(); 1301 } 1302 return 0; 1303 } 1304 1305 static int __init disable_acpi_pci(const struct dmi_system_id *d) 1306 { 1307 if (!acpi_force) { 1308 printk(KERN_NOTICE "%s detected: force use of pci=noacpi\n", 1309 d->ident); 1310 acpi_disable_pci(); 1311 } 1312 return 0; 1313 } 1314 1315 static int __init dmi_disable_acpi(const struct dmi_system_id *d) 1316 { 1317 if (!acpi_force) { 1318 printk(KERN_NOTICE "%s detected: acpi off\n", d->ident); 1319 disable_acpi(); 1320 } else { 1321 printk(KERN_NOTICE 1322 "Warning: DMI blacklist says broken, but acpi forced\n"); 1323 } 1324 return 0; 1325 } 1326 1327 /* 1328 * Force ignoring BIOS IRQ0 override 1329 */ 1330 static int __init dmi_ignore_irq0_timer_override(const struct dmi_system_id *d) 1331 { 1332 if (!acpi_skip_timer_override) { 1333 pr_notice("%s detected: Ignoring BIOS IRQ0 override\n", 1334 d->ident); 1335 acpi_skip_timer_override = 1; 1336 } 1337 return 0; 1338 } 1339 1340 /* 1341 * ACPI offers an alternative platform interface model that removes 1342 * ACPI hardware requirements for platforms that do not implement 1343 * the PC Architecture. 1344 * 1345 * We initialize the Hardware-reduced ACPI model here: 1346 */ 1347 static void __init acpi_reduced_hw_init(void) 1348 { 1349 if (acpi_gbl_reduced_hardware) { 1350 /* 1351 * Override x86_init functions and bypass legacy pic 1352 * in Hardware-reduced ACPI mode 1353 */ 1354 x86_init.timers.timer_init = x86_init_noop; 1355 x86_init.irqs.pre_vector_init = x86_init_noop; 1356 legacy_pic = &null_legacy_pic; 1357 } 1358 } 1359 1360 /* 1361 * If your system is blacklisted here, but you find that acpi=force 1362 * works for you, please contact linux-acpi@vger.kernel.org 1363 */ 1364 static struct dmi_system_id __initdata acpi_dmi_table[] = { 1365 /* 1366 * Boxes that need ACPI disabled 1367 */ 1368 { 1369 .callback = dmi_disable_acpi, 1370 .ident = "IBM Thinkpad", 1371 .matches = { 1372 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), 1373 DMI_MATCH(DMI_BOARD_NAME, "2629H1G"), 1374 }, 1375 }, 1376 1377 /* 1378 * Boxes that need ACPI PCI IRQ routing disabled 1379 */ 1380 { 1381 .callback = disable_acpi_irq, 1382 .ident = "ASUS A7V", 1383 .matches = { 1384 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC"), 1385 DMI_MATCH(DMI_BOARD_NAME, "<A7V>"), 1386 /* newer BIOS, Revision 1011, does work */ 1387 DMI_MATCH(DMI_BIOS_VERSION, 1388 "ASUS A7V ACPI BIOS Revision 1007"), 1389 }, 1390 }, 1391 { 1392 /* 1393 * Latest BIOS for IBM 600E (1.16) has bad pcinum 1394 * for LPC bridge, which is needed for the PCI 1395 * interrupt links to work. DSDT fix is in bug 5966. 1396 * 2645, 2646 model numbers are shared with 600/600E/600X 1397 */ 1398 .callback = disable_acpi_irq, 1399 .ident = "IBM Thinkpad 600 Series 2645", 1400 .matches = { 1401 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), 1402 DMI_MATCH(DMI_BOARD_NAME, "2645"), 1403 }, 1404 }, 1405 { 1406 .callback = disable_acpi_irq, 1407 .ident = "IBM Thinkpad 600 Series 2646", 1408 .matches = { 1409 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), 1410 DMI_MATCH(DMI_BOARD_NAME, "2646"), 1411 }, 1412 }, 1413 /* 1414 * Boxes that need ACPI PCI IRQ routing and PCI scan disabled 1415 */ 1416 { /* _BBN 0 bug */ 1417 .callback = disable_acpi_pci, 1418 .ident = "ASUS PR-DLS", 1419 .matches = { 1420 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."), 1421 DMI_MATCH(DMI_BOARD_NAME, "PR-DLS"), 1422 DMI_MATCH(DMI_BIOS_VERSION, 1423 "ASUS PR-DLS ACPI BIOS Revision 1010"), 1424 DMI_MATCH(DMI_BIOS_DATE, "03/21/2003") 1425 }, 1426 }, 1427 { 1428 .callback = disable_acpi_pci, 1429 .ident = "Acer TravelMate 36x Laptop", 1430 .matches = { 1431 DMI_MATCH(DMI_SYS_VENDOR, "Acer"), 1432 DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"), 1433 }, 1434 }, 1435 {} 1436 }; 1437 1438 /* second table for DMI checks that should run after early-quirks */ 1439 static struct dmi_system_id __initdata acpi_dmi_table_late[] = { 1440 /* 1441 * HP laptops which use a DSDT reporting as HP/SB400/10000, 1442 * which includes some code which overrides all temperature 1443 * trip points to 16C if the INTIN2 input of the I/O APIC 1444 * is enabled. This input is incorrectly designated the 1445 * ISA IRQ 0 via an interrupt source override even though 1446 * it is wired to the output of the master 8259A and INTIN0 1447 * is not connected at all. Force ignoring BIOS IRQ0 1448 * override in that cases. 1449 */ 1450 { 1451 .callback = dmi_ignore_irq0_timer_override, 1452 .ident = "HP nx6115 laptop", 1453 .matches = { 1454 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 1455 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6115"), 1456 }, 1457 }, 1458 { 1459 .callback = dmi_ignore_irq0_timer_override, 1460 .ident = "HP NX6125 laptop", 1461 .matches = { 1462 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 1463 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6125"), 1464 }, 1465 }, 1466 { 1467 .callback = dmi_ignore_irq0_timer_override, 1468 .ident = "HP NX6325 laptop", 1469 .matches = { 1470 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 1471 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6325"), 1472 }, 1473 }, 1474 { 1475 .callback = dmi_ignore_irq0_timer_override, 1476 .ident = "HP 6715b laptop", 1477 .matches = { 1478 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 1479 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq 6715b"), 1480 }, 1481 }, 1482 { 1483 .callback = dmi_ignore_irq0_timer_override, 1484 .ident = "FUJITSU SIEMENS", 1485 .matches = { 1486 DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"), 1487 DMI_MATCH(DMI_PRODUCT_NAME, "AMILO PRO V2030"), 1488 }, 1489 }, 1490 {} 1491 }; 1492 1493 /* 1494 * acpi_boot_table_init() and acpi_boot_init() 1495 * called from setup_arch(), always. 1496 * 1. checksums all tables 1497 * 2. enumerates lapics 1498 * 3. enumerates io-apics 1499 * 1500 * acpi_table_init() is separate to allow reading SRAT without 1501 * other side effects. 1502 * 1503 * side effects of acpi_boot_init: 1504 * acpi_lapic = 1 if LAPIC found 1505 * acpi_ioapic = 1 if IOAPIC found 1506 * if (acpi_lapic && acpi_ioapic) smp_found_config = 1; 1507 * if acpi_blacklisted() acpi_disabled = 1; 1508 * acpi_irq_model=... 1509 * ... 1510 */ 1511 1512 void __init acpi_boot_table_init(void) 1513 { 1514 dmi_check_system(acpi_dmi_table); 1515 1516 /* 1517 * If acpi_disabled, bail out 1518 */ 1519 if (acpi_disabled) 1520 return; 1521 1522 /* 1523 * Initialize the ACPI boot-time table parser. 1524 */ 1525 if (acpi_table_init()) { 1526 disable_acpi(); 1527 return; 1528 } 1529 1530 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf); 1531 1532 /* 1533 * blacklist may disable ACPI entirely 1534 */ 1535 if (acpi_blacklisted()) { 1536 if (acpi_force) { 1537 printk(KERN_WARNING PREFIX "acpi=force override\n"); 1538 } else { 1539 printk(KERN_WARNING PREFIX "Disabling ACPI support\n"); 1540 disable_acpi(); 1541 return; 1542 } 1543 } 1544 } 1545 1546 int __init early_acpi_boot_init(void) 1547 { 1548 /* 1549 * If acpi_disabled, bail out 1550 */ 1551 if (acpi_disabled) 1552 return 1; 1553 1554 /* 1555 * Process the Multiple APIC Description Table (MADT), if present 1556 */ 1557 early_acpi_process_madt(); 1558 1559 /* 1560 * Hardware-reduced ACPI mode initialization: 1561 */ 1562 acpi_reduced_hw_init(); 1563 1564 return 0; 1565 } 1566 1567 int __init acpi_boot_init(void) 1568 { 1569 /* those are executed after early-quirks are executed */ 1570 dmi_check_system(acpi_dmi_table_late); 1571 1572 /* 1573 * If acpi_disabled, bail out 1574 */ 1575 if (acpi_disabled) 1576 return 1; 1577 1578 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf); 1579 1580 /* 1581 * set sci_int and PM timer address 1582 */ 1583 acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt); 1584 1585 /* 1586 * Process the Multiple APIC Description Table (MADT), if present 1587 */ 1588 acpi_process_madt(); 1589 1590 acpi_table_parse(ACPI_SIG_HPET, acpi_parse_hpet); 1591 1592 if (!acpi_noirq) 1593 x86_init.pci.init = pci_acpi_init; 1594 1595 return 0; 1596 } 1597 1598 static int __init parse_acpi(char *arg) 1599 { 1600 if (!arg) 1601 return -EINVAL; 1602 1603 /* "acpi=off" disables both ACPI table parsing and interpreter */ 1604 if (strcmp(arg, "off") == 0) { 1605 disable_acpi(); 1606 } 1607 /* acpi=force to over-ride black-list */ 1608 else if (strcmp(arg, "force") == 0) { 1609 acpi_force = 1; 1610 acpi_disabled = 0; 1611 } 1612 /* acpi=strict disables out-of-spec workarounds */ 1613 else if (strcmp(arg, "strict") == 0) { 1614 acpi_strict = 1; 1615 } 1616 /* acpi=rsdt use RSDT instead of XSDT */ 1617 else if (strcmp(arg, "rsdt") == 0) { 1618 acpi_gbl_do_not_use_xsdt = TRUE; 1619 } 1620 /* "acpi=noirq" disables ACPI interrupt routing */ 1621 else if (strcmp(arg, "noirq") == 0) { 1622 acpi_noirq_set(); 1623 } 1624 /* "acpi=copy_dsdt" copys DSDT */ 1625 else if (strcmp(arg, "copy_dsdt") == 0) { 1626 acpi_gbl_copy_dsdt_locally = 1; 1627 } 1628 /* "acpi=nocmcff" disables FF mode for corrected errors */ 1629 else if (strcmp(arg, "nocmcff") == 0) { 1630 acpi_disable_cmcff = 1; 1631 } else { 1632 /* Core will printk when we return error. */ 1633 return -EINVAL; 1634 } 1635 return 0; 1636 } 1637 early_param("acpi", parse_acpi); 1638 1639 /* FIXME: Using pci= for an ACPI parameter is a travesty. */ 1640 static int __init parse_pci(char *arg) 1641 { 1642 if (arg && strcmp(arg, "noacpi") == 0) 1643 acpi_disable_pci(); 1644 return 0; 1645 } 1646 early_param("pci", parse_pci); 1647 1648 int __init acpi_mps_check(void) 1649 { 1650 #if defined(CONFIG_X86_LOCAL_APIC) && !defined(CONFIG_X86_MPPARSE) 1651 /* mptable code is not built-in*/ 1652 if (acpi_disabled || acpi_noirq) { 1653 printk(KERN_WARNING "MPS support code is not built-in.\n" 1654 "Using acpi=off or acpi=noirq or pci=noacpi " 1655 "may have problem\n"); 1656 return 1; 1657 } 1658 #endif 1659 return 0; 1660 } 1661 1662 #ifdef CONFIG_X86_IO_APIC 1663 static int __init parse_acpi_skip_timer_override(char *arg) 1664 { 1665 acpi_skip_timer_override = 1; 1666 return 0; 1667 } 1668 early_param("acpi_skip_timer_override", parse_acpi_skip_timer_override); 1669 1670 static int __init parse_acpi_use_timer_override(char *arg) 1671 { 1672 acpi_use_timer_override = 1; 1673 return 0; 1674 } 1675 early_param("acpi_use_timer_override", parse_acpi_use_timer_override); 1676 #endif /* CONFIG_X86_IO_APIC */ 1677 1678 static int __init setup_acpi_sci(char *s) 1679 { 1680 if (!s) 1681 return -EINVAL; 1682 if (!strcmp(s, "edge")) 1683 acpi_sci_flags = ACPI_MADT_TRIGGER_EDGE | 1684 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK); 1685 else if (!strcmp(s, "level")) 1686 acpi_sci_flags = ACPI_MADT_TRIGGER_LEVEL | 1687 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK); 1688 else if (!strcmp(s, "high")) 1689 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_HIGH | 1690 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK); 1691 else if (!strcmp(s, "low")) 1692 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_LOW | 1693 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK); 1694 else 1695 return -EINVAL; 1696 return 0; 1697 } 1698 early_param("acpi_sci", setup_acpi_sci); 1699 1700 int __acpi_acquire_global_lock(unsigned int *lock) 1701 { 1702 unsigned int old, new, val; 1703 do { 1704 old = *lock; 1705 new = (((old & ~0x3) + 2) + ((old >> 1) & 0x1)); 1706 val = cmpxchg(lock, old, new); 1707 } while (unlikely (val != old)); 1708 return (new < 3) ? -1 : 0; 1709 } 1710 1711 int __acpi_release_global_lock(unsigned int *lock) 1712 { 1713 unsigned int old, new, val; 1714 do { 1715 old = *lock; 1716 new = old & ~0x3; 1717 val = cmpxchg(lock, old, new); 1718 } while (unlikely (val != old)); 1719 return old & 0x1; 1720 } 1721 1722 void __init arch_reserve_mem_area(acpi_physical_address addr, size_t size) 1723 { 1724 e820_add_region(addr, size, E820_ACPI); 1725 update_e820(); 1726 } 1727