1 /* 2 * boot.c - Architecture-Specific Low-Level ACPI Boot Support 3 * 4 * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com> 5 * Copyright (C) 2001 Jun Nakajima <jun.nakajima@intel.com> 6 * 7 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 8 * 9 * This program is free software; you can redistribute it and/or modify 10 * it under the terms of the GNU General Public License as published by 11 * the Free Software Foundation; either version 2 of the License, or 12 * (at your option) any later version. 13 * 14 * This program is distributed in the hope that it will be useful, 15 * but WITHOUT ANY WARRANTY; without even the implied warranty of 16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 17 * GNU General Public License for more details. 18 * 19 * You should have received a copy of the GNU General Public License 20 * along with this program; if not, write to the Free Software 21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 22 * 23 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 24 */ 25 26 #include <linux/init.h> 27 #include <linux/acpi.h> 28 #include <linux/acpi_pmtmr.h> 29 #include <linux/efi.h> 30 #include <linux/cpumask.h> 31 #include <linux/export.h> 32 #include <linux/dmi.h> 33 #include <linux/irq.h> 34 #include <linux/slab.h> 35 #include <linux/bootmem.h> 36 #include <linux/ioport.h> 37 #include <linux/pci.h> 38 39 #include <asm/irqdomain.h> 40 #include <asm/pci_x86.h> 41 #include <asm/pgtable.h> 42 #include <asm/io_apic.h> 43 #include <asm/apic.h> 44 #include <asm/io.h> 45 #include <asm/mpspec.h> 46 #include <asm/smp.h> 47 #include <asm/i8259.h> 48 49 #include "sleep.h" /* To include x86_acpi_suspend_lowlevel */ 50 static int __initdata acpi_force = 0; 51 int acpi_disabled; 52 EXPORT_SYMBOL(acpi_disabled); 53 54 #ifdef CONFIG_X86_64 55 # include <asm/proto.h> 56 #endif /* X86 */ 57 58 #define PREFIX "ACPI: " 59 60 int acpi_noirq; /* skip ACPI IRQ initialization */ 61 int acpi_pci_disabled; /* skip ACPI PCI scan and IRQ initialization */ 62 EXPORT_SYMBOL(acpi_pci_disabled); 63 64 int acpi_lapic; 65 int acpi_ioapic; 66 int acpi_strict; 67 int acpi_disable_cmcff; 68 69 u8 acpi_sci_flags __initdata; 70 int acpi_sci_override_gsi __initdata; 71 int acpi_skip_timer_override __initdata; 72 int acpi_use_timer_override __initdata; 73 int acpi_fix_pin2_polarity __initdata; 74 75 #ifdef CONFIG_X86_LOCAL_APIC 76 static u64 acpi_lapic_addr __initdata = APIC_DEFAULT_PHYS_BASE; 77 #endif 78 79 /* 80 * Locks related to IOAPIC hotplug 81 * Hotplug side: 82 * ->device_hotplug_lock 83 * ->acpi_ioapic_lock 84 * ->ioapic_lock 85 * Interrupt mapping side: 86 * ->acpi_ioapic_lock 87 * ->ioapic_mutex 88 * ->ioapic_lock 89 */ 90 static DEFINE_MUTEX(acpi_ioapic_lock); 91 92 /* -------------------------------------------------------------------------- 93 Boot-time Configuration 94 -------------------------------------------------------------------------- */ 95 96 /* 97 * The default interrupt routing model is PIC (8259). This gets 98 * overridden if IOAPICs are enumerated (below). 99 */ 100 enum acpi_irq_model_id acpi_irq_model = ACPI_IRQ_MODEL_PIC; 101 102 103 /* 104 * ISA irqs by default are the first 16 gsis but can be 105 * any gsi as specified by an interrupt source override. 106 */ 107 static u32 isa_irq_to_gsi[NR_IRQS_LEGACY] __read_mostly = { 108 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 109 }; 110 111 #define ACPI_INVALID_GSI INT_MIN 112 113 /* 114 * This is just a simple wrapper around early_ioremap(), 115 * with sanity checks for phys == 0 and size == 0. 116 */ 117 char *__init __acpi_map_table(unsigned long phys, unsigned long size) 118 { 119 120 if (!phys || !size) 121 return NULL; 122 123 return early_ioremap(phys, size); 124 } 125 126 void __init __acpi_unmap_table(char *map, unsigned long size) 127 { 128 if (!map || !size) 129 return; 130 131 early_iounmap(map, size); 132 } 133 134 #ifdef CONFIG_X86_LOCAL_APIC 135 static int __init acpi_parse_madt(struct acpi_table_header *table) 136 { 137 struct acpi_table_madt *madt = NULL; 138 139 if (!boot_cpu_has(X86_FEATURE_APIC)) 140 return -EINVAL; 141 142 madt = (struct acpi_table_madt *)table; 143 if (!madt) { 144 printk(KERN_WARNING PREFIX "Unable to map MADT\n"); 145 return -ENODEV; 146 } 147 148 if (madt->address) { 149 acpi_lapic_addr = (u64) madt->address; 150 151 printk(KERN_DEBUG PREFIX "Local APIC address 0x%08x\n", 152 madt->address); 153 } 154 155 default_acpi_madt_oem_check(madt->header.oem_id, 156 madt->header.oem_table_id); 157 158 return 0; 159 } 160 161 /** 162 * acpi_register_lapic - register a local apic and generates a logic cpu number 163 * @id: local apic id to register 164 * @acpiid: ACPI id to register 165 * @enabled: this cpu is enabled or not 166 * 167 * Returns the logic cpu number which maps to the local apic 168 */ 169 static int acpi_register_lapic(int id, u32 acpiid, u8 enabled) 170 { 171 unsigned int ver = 0; 172 int cpu; 173 174 if (id >= MAX_LOCAL_APIC) { 175 printk(KERN_INFO PREFIX "skipped apicid that is too big\n"); 176 return -EINVAL; 177 } 178 179 if (boot_cpu_physical_apicid != -1U) 180 ver = boot_cpu_apic_version; 181 182 cpu = __generic_processor_info(id, ver, enabled); 183 if (cpu >= 0) 184 early_per_cpu(x86_cpu_to_acpiid, cpu) = acpiid; 185 186 return cpu; 187 } 188 189 static int __init 190 acpi_parse_x2apic(struct acpi_subtable_header *header, const unsigned long end) 191 { 192 struct acpi_madt_local_x2apic *processor = NULL; 193 int apic_id; 194 u8 enabled; 195 196 processor = (struct acpi_madt_local_x2apic *)header; 197 198 if (BAD_MADT_ENTRY(processor, end)) 199 return -EINVAL; 200 201 acpi_table_print_madt_entry(header); 202 203 apic_id = processor->local_apic_id; 204 enabled = processor->lapic_flags & ACPI_MADT_ENABLED; 205 #ifdef CONFIG_X86_X2APIC 206 /* 207 * We need to register disabled CPU as well to permit 208 * counting disabled CPUs. This allows us to size 209 * cpus_possible_map more accurately, to permit 210 * to not preallocating memory for all NR_CPUS 211 * when we use CPU hotplug. 212 */ 213 if (!apic->apic_id_valid(apic_id) && enabled) 214 printk(KERN_WARNING PREFIX "x2apic entry ignored\n"); 215 else 216 acpi_register_lapic(apic_id, processor->uid, enabled); 217 #else 218 printk(KERN_WARNING PREFIX "x2apic entry ignored\n"); 219 #endif 220 221 return 0; 222 } 223 224 static int __init 225 acpi_parse_lapic(struct acpi_subtable_header * header, const unsigned long end) 226 { 227 struct acpi_madt_local_apic *processor = NULL; 228 229 processor = (struct acpi_madt_local_apic *)header; 230 231 if (BAD_MADT_ENTRY(processor, end)) 232 return -EINVAL; 233 234 acpi_table_print_madt_entry(header); 235 236 /* Ignore invalid ID */ 237 if (processor->id == 0xff) 238 return 0; 239 240 /* 241 * We need to register disabled CPU as well to permit 242 * counting disabled CPUs. This allows us to size 243 * cpus_possible_map more accurately, to permit 244 * to not preallocating memory for all NR_CPUS 245 * when we use CPU hotplug. 246 */ 247 acpi_register_lapic(processor->id, /* APIC ID */ 248 processor->processor_id, /* ACPI ID */ 249 processor->lapic_flags & ACPI_MADT_ENABLED); 250 251 return 0; 252 } 253 254 static int __init 255 acpi_parse_sapic(struct acpi_subtable_header *header, const unsigned long end) 256 { 257 struct acpi_madt_local_sapic *processor = NULL; 258 259 processor = (struct acpi_madt_local_sapic *)header; 260 261 if (BAD_MADT_ENTRY(processor, end)) 262 return -EINVAL; 263 264 acpi_table_print_madt_entry(header); 265 266 acpi_register_lapic((processor->id << 8) | processor->eid,/* APIC ID */ 267 processor->processor_id, /* ACPI ID */ 268 processor->lapic_flags & ACPI_MADT_ENABLED); 269 270 return 0; 271 } 272 273 static int __init 274 acpi_parse_lapic_addr_ovr(struct acpi_subtable_header * header, 275 const unsigned long end) 276 { 277 struct acpi_madt_local_apic_override *lapic_addr_ovr = NULL; 278 279 lapic_addr_ovr = (struct acpi_madt_local_apic_override *)header; 280 281 if (BAD_MADT_ENTRY(lapic_addr_ovr, end)) 282 return -EINVAL; 283 284 acpi_table_print_madt_entry(header); 285 286 acpi_lapic_addr = lapic_addr_ovr->address; 287 288 return 0; 289 } 290 291 static int __init 292 acpi_parse_x2apic_nmi(struct acpi_subtable_header *header, 293 const unsigned long end) 294 { 295 struct acpi_madt_local_x2apic_nmi *x2apic_nmi = NULL; 296 297 x2apic_nmi = (struct acpi_madt_local_x2apic_nmi *)header; 298 299 if (BAD_MADT_ENTRY(x2apic_nmi, end)) 300 return -EINVAL; 301 302 acpi_table_print_madt_entry(header); 303 304 if (x2apic_nmi->lint != 1) 305 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n"); 306 307 return 0; 308 } 309 310 static int __init 311 acpi_parse_lapic_nmi(struct acpi_subtable_header * header, const unsigned long end) 312 { 313 struct acpi_madt_local_apic_nmi *lapic_nmi = NULL; 314 315 lapic_nmi = (struct acpi_madt_local_apic_nmi *)header; 316 317 if (BAD_MADT_ENTRY(lapic_nmi, end)) 318 return -EINVAL; 319 320 acpi_table_print_madt_entry(header); 321 322 if (lapic_nmi->lint != 1) 323 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n"); 324 325 return 0; 326 } 327 328 #endif /*CONFIG_X86_LOCAL_APIC */ 329 330 #ifdef CONFIG_X86_IO_APIC 331 #define MP_ISA_BUS 0 332 333 static void __init mp_override_legacy_irq(u8 bus_irq, u8 polarity, u8 trigger, 334 u32 gsi) 335 { 336 int ioapic; 337 int pin; 338 struct mpc_intsrc mp_irq; 339 340 /* 341 * Convert 'gsi' to 'ioapic.pin'. 342 */ 343 ioapic = mp_find_ioapic(gsi); 344 if (ioapic < 0) 345 return; 346 pin = mp_find_ioapic_pin(ioapic, gsi); 347 348 /* 349 * TBD: This check is for faulty timer entries, where the override 350 * erroneously sets the trigger to level, resulting in a HUGE 351 * increase of timer interrupts! 352 */ 353 if ((bus_irq == 0) && (trigger == 3)) 354 trigger = 1; 355 356 mp_irq.type = MP_INTSRC; 357 mp_irq.irqtype = mp_INT; 358 mp_irq.irqflag = (trigger << 2) | polarity; 359 mp_irq.srcbus = MP_ISA_BUS; 360 mp_irq.srcbusirq = bus_irq; /* IRQ */ 361 mp_irq.dstapic = mpc_ioapic_id(ioapic); /* APIC ID */ 362 mp_irq.dstirq = pin; /* INTIN# */ 363 364 mp_save_irq(&mp_irq); 365 366 /* 367 * Reset default identity mapping if gsi is also an legacy IRQ, 368 * otherwise there will be more than one entry with the same GSI 369 * and acpi_isa_irq_to_gsi() may give wrong result. 370 */ 371 if (gsi < nr_legacy_irqs() && isa_irq_to_gsi[gsi] == gsi) 372 isa_irq_to_gsi[gsi] = ACPI_INVALID_GSI; 373 isa_irq_to_gsi[bus_irq] = gsi; 374 } 375 376 static int mp_config_acpi_gsi(struct device *dev, u32 gsi, int trigger, 377 int polarity) 378 { 379 #ifdef CONFIG_X86_MPPARSE 380 struct mpc_intsrc mp_irq; 381 struct pci_dev *pdev; 382 unsigned char number; 383 unsigned int devfn; 384 int ioapic; 385 u8 pin; 386 387 if (!acpi_ioapic) 388 return 0; 389 if (!dev || !dev_is_pci(dev)) 390 return 0; 391 392 pdev = to_pci_dev(dev); 393 number = pdev->bus->number; 394 devfn = pdev->devfn; 395 pin = pdev->pin; 396 /* print the entry should happen on mptable identically */ 397 mp_irq.type = MP_INTSRC; 398 mp_irq.irqtype = mp_INT; 399 mp_irq.irqflag = (trigger == ACPI_EDGE_SENSITIVE ? 4 : 0x0c) | 400 (polarity == ACPI_ACTIVE_HIGH ? 1 : 3); 401 mp_irq.srcbus = number; 402 mp_irq.srcbusirq = (((devfn >> 3) & 0x1f) << 2) | ((pin - 1) & 3); 403 ioapic = mp_find_ioapic(gsi); 404 mp_irq.dstapic = mpc_ioapic_id(ioapic); 405 mp_irq.dstirq = mp_find_ioapic_pin(ioapic, gsi); 406 407 mp_save_irq(&mp_irq); 408 #endif 409 return 0; 410 } 411 412 static int __init 413 acpi_parse_ioapic(struct acpi_subtable_header * header, const unsigned long end) 414 { 415 struct acpi_madt_io_apic *ioapic = NULL; 416 struct ioapic_domain_cfg cfg = { 417 .type = IOAPIC_DOMAIN_DYNAMIC, 418 .ops = &mp_ioapic_irqdomain_ops, 419 }; 420 421 ioapic = (struct acpi_madt_io_apic *)header; 422 423 if (BAD_MADT_ENTRY(ioapic, end)) 424 return -EINVAL; 425 426 acpi_table_print_madt_entry(header); 427 428 /* Statically assign IRQ numbers for IOAPICs hosting legacy IRQs */ 429 if (ioapic->global_irq_base < nr_legacy_irqs()) 430 cfg.type = IOAPIC_DOMAIN_LEGACY; 431 432 mp_register_ioapic(ioapic->id, ioapic->address, ioapic->global_irq_base, 433 &cfg); 434 435 return 0; 436 } 437 438 /* 439 * Parse Interrupt Source Override for the ACPI SCI 440 */ 441 static void __init acpi_sci_ioapic_setup(u8 bus_irq, u16 polarity, u16 trigger, u32 gsi) 442 { 443 if (trigger == 0) /* compatible SCI trigger is level */ 444 trigger = 3; 445 446 if (polarity == 0) /* compatible SCI polarity is low */ 447 polarity = 3; 448 449 /* Command-line over-ride via acpi_sci= */ 450 if (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) 451 trigger = (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2; 452 453 if (acpi_sci_flags & ACPI_MADT_POLARITY_MASK) 454 polarity = acpi_sci_flags & ACPI_MADT_POLARITY_MASK; 455 456 mp_override_legacy_irq(bus_irq, polarity, trigger, gsi); 457 acpi_penalize_sci_irq(bus_irq, trigger, polarity); 458 459 /* 460 * stash over-ride to indicate we've been here 461 * and for later update of acpi_gbl_FADT 462 */ 463 acpi_sci_override_gsi = gsi; 464 return; 465 } 466 467 static int __init 468 acpi_parse_int_src_ovr(struct acpi_subtable_header * header, 469 const unsigned long end) 470 { 471 struct acpi_madt_interrupt_override *intsrc = NULL; 472 473 intsrc = (struct acpi_madt_interrupt_override *)header; 474 475 if (BAD_MADT_ENTRY(intsrc, end)) 476 return -EINVAL; 477 478 acpi_table_print_madt_entry(header); 479 480 if (intsrc->source_irq == acpi_gbl_FADT.sci_interrupt) { 481 acpi_sci_ioapic_setup(intsrc->source_irq, 482 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK, 483 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2, 484 intsrc->global_irq); 485 return 0; 486 } 487 488 if (intsrc->source_irq == 0) { 489 if (acpi_skip_timer_override) { 490 printk(PREFIX "BIOS IRQ0 override ignored.\n"); 491 return 0; 492 } 493 494 if ((intsrc->global_irq == 2) && acpi_fix_pin2_polarity 495 && (intsrc->inti_flags & ACPI_MADT_POLARITY_MASK)) { 496 intsrc->inti_flags &= ~ACPI_MADT_POLARITY_MASK; 497 printk(PREFIX "BIOS IRQ0 pin2 override: forcing polarity to high active.\n"); 498 } 499 } 500 501 mp_override_legacy_irq(intsrc->source_irq, 502 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK, 503 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2, 504 intsrc->global_irq); 505 506 return 0; 507 } 508 509 static int __init 510 acpi_parse_nmi_src(struct acpi_subtable_header * header, const unsigned long end) 511 { 512 struct acpi_madt_nmi_source *nmi_src = NULL; 513 514 nmi_src = (struct acpi_madt_nmi_source *)header; 515 516 if (BAD_MADT_ENTRY(nmi_src, end)) 517 return -EINVAL; 518 519 acpi_table_print_madt_entry(header); 520 521 /* TBD: Support nimsrc entries? */ 522 523 return 0; 524 } 525 526 #endif /* CONFIG_X86_IO_APIC */ 527 528 /* 529 * acpi_pic_sci_set_trigger() 530 * 531 * use ELCR to set PIC-mode trigger type for SCI 532 * 533 * If a PIC-mode SCI is not recognized or gives spurious IRQ7's 534 * it may require Edge Trigger -- use "acpi_sci=edge" 535 * 536 * Port 0x4d0-4d1 are ECLR1 and ECLR2, the Edge/Level Control Registers 537 * for the 8259 PIC. bit[n] = 1 means irq[n] is Level, otherwise Edge. 538 * ECLR1 is IRQs 0-7 (IRQ 0, 1, 2 must be 0) 539 * ECLR2 is IRQs 8-15 (IRQ 8, 13 must be 0) 540 */ 541 542 void __init acpi_pic_sci_set_trigger(unsigned int irq, u16 trigger) 543 { 544 unsigned int mask = 1 << irq; 545 unsigned int old, new; 546 547 /* Real old ELCR mask */ 548 old = inb(0x4d0) | (inb(0x4d1) << 8); 549 550 /* 551 * If we use ACPI to set PCI IRQs, then we should clear ELCR 552 * since we will set it correctly as we enable the PCI irq 553 * routing. 554 */ 555 new = acpi_noirq ? old : 0; 556 557 /* 558 * Update SCI information in the ELCR, it isn't in the PCI 559 * routing tables.. 560 */ 561 switch (trigger) { 562 case 1: /* Edge - clear */ 563 new &= ~mask; 564 break; 565 case 3: /* Level - set */ 566 new |= mask; 567 break; 568 } 569 570 if (old == new) 571 return; 572 573 printk(PREFIX "setting ELCR to %04x (from %04x)\n", new, old); 574 outb(new, 0x4d0); 575 outb(new >> 8, 0x4d1); 576 } 577 578 int acpi_gsi_to_irq(u32 gsi, unsigned int *irqp) 579 { 580 int rc, irq, trigger, polarity; 581 582 if (acpi_irq_model == ACPI_IRQ_MODEL_PIC) { 583 *irqp = gsi; 584 return 0; 585 } 586 587 rc = acpi_get_override_irq(gsi, &trigger, &polarity); 588 if (rc == 0) { 589 trigger = trigger ? ACPI_LEVEL_SENSITIVE : ACPI_EDGE_SENSITIVE; 590 polarity = polarity ? ACPI_ACTIVE_LOW : ACPI_ACTIVE_HIGH; 591 irq = acpi_register_gsi(NULL, gsi, trigger, polarity); 592 if (irq >= 0) { 593 *irqp = irq; 594 return 0; 595 } 596 } 597 598 return -1; 599 } 600 EXPORT_SYMBOL_GPL(acpi_gsi_to_irq); 601 602 int acpi_isa_irq_to_gsi(unsigned isa_irq, u32 *gsi) 603 { 604 if (isa_irq < nr_legacy_irqs() && 605 isa_irq_to_gsi[isa_irq] != ACPI_INVALID_GSI) { 606 *gsi = isa_irq_to_gsi[isa_irq]; 607 return 0; 608 } 609 610 return -1; 611 } 612 613 static int acpi_register_gsi_pic(struct device *dev, u32 gsi, 614 int trigger, int polarity) 615 { 616 #ifdef CONFIG_PCI 617 /* 618 * Make sure all (legacy) PCI IRQs are set as level-triggered. 619 */ 620 if (trigger == ACPI_LEVEL_SENSITIVE) 621 elcr_set_level_irq(gsi); 622 #endif 623 624 return gsi; 625 } 626 627 #ifdef CONFIG_X86_LOCAL_APIC 628 static int acpi_register_gsi_ioapic(struct device *dev, u32 gsi, 629 int trigger, int polarity) 630 { 631 int irq = gsi; 632 #ifdef CONFIG_X86_IO_APIC 633 int node; 634 struct irq_alloc_info info; 635 636 node = dev ? dev_to_node(dev) : NUMA_NO_NODE; 637 trigger = trigger == ACPI_EDGE_SENSITIVE ? 0 : 1; 638 polarity = polarity == ACPI_ACTIVE_HIGH ? 0 : 1; 639 ioapic_set_alloc_attr(&info, node, trigger, polarity); 640 641 mutex_lock(&acpi_ioapic_lock); 642 irq = mp_map_gsi_to_irq(gsi, IOAPIC_MAP_ALLOC, &info); 643 /* Don't set up the ACPI SCI because it's already set up */ 644 if (irq >= 0 && enable_update_mptable && 645 acpi_gbl_FADT.sci_interrupt != gsi) 646 mp_config_acpi_gsi(dev, gsi, trigger, polarity); 647 mutex_unlock(&acpi_ioapic_lock); 648 #endif 649 650 return irq; 651 } 652 653 static void acpi_unregister_gsi_ioapic(u32 gsi) 654 { 655 #ifdef CONFIG_X86_IO_APIC 656 int irq; 657 658 mutex_lock(&acpi_ioapic_lock); 659 irq = mp_map_gsi_to_irq(gsi, 0, NULL); 660 if (irq > 0) 661 mp_unmap_irq(irq); 662 mutex_unlock(&acpi_ioapic_lock); 663 #endif 664 } 665 #endif 666 667 int (*__acpi_register_gsi)(struct device *dev, u32 gsi, 668 int trigger, int polarity) = acpi_register_gsi_pic; 669 void (*__acpi_unregister_gsi)(u32 gsi) = NULL; 670 671 #ifdef CONFIG_ACPI_SLEEP 672 int (*acpi_suspend_lowlevel)(void) = x86_acpi_suspend_lowlevel; 673 #else 674 int (*acpi_suspend_lowlevel)(void); 675 #endif 676 677 /* 678 * success: return IRQ number (>=0) 679 * failure: return < 0 680 */ 681 int acpi_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity) 682 { 683 return __acpi_register_gsi(dev, gsi, trigger, polarity); 684 } 685 EXPORT_SYMBOL_GPL(acpi_register_gsi); 686 687 void acpi_unregister_gsi(u32 gsi) 688 { 689 if (__acpi_unregister_gsi) 690 __acpi_unregister_gsi(gsi); 691 } 692 EXPORT_SYMBOL_GPL(acpi_unregister_gsi); 693 694 #ifdef CONFIG_X86_LOCAL_APIC 695 static void __init acpi_set_irq_model_ioapic(void) 696 { 697 acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC; 698 __acpi_register_gsi = acpi_register_gsi_ioapic; 699 __acpi_unregister_gsi = acpi_unregister_gsi_ioapic; 700 acpi_ioapic = 1; 701 } 702 #endif 703 704 /* 705 * ACPI based hotplug support for CPU 706 */ 707 #ifdef CONFIG_ACPI_HOTPLUG_CPU 708 #include <acpi/processor.h> 709 710 int acpi_map_cpu2node(acpi_handle handle, int cpu, int physid) 711 { 712 #ifdef CONFIG_ACPI_NUMA 713 int nid; 714 715 nid = acpi_get_node(handle); 716 if (nid != -1) { 717 set_apicid_to_node(physid, nid); 718 numa_set_node(cpu, nid); 719 } 720 #endif 721 return 0; 722 } 723 724 int acpi_map_cpu(acpi_handle handle, phys_cpuid_t physid, int *pcpu) 725 { 726 int cpu; 727 728 cpu = acpi_register_lapic(physid, U32_MAX, ACPI_MADT_ENABLED); 729 if (cpu < 0) { 730 pr_info(PREFIX "Unable to map lapic to logical cpu number\n"); 731 return cpu; 732 } 733 734 acpi_processor_set_pdc(handle); 735 acpi_map_cpu2node(handle, cpu, physid); 736 737 *pcpu = cpu; 738 return 0; 739 } 740 EXPORT_SYMBOL(acpi_map_cpu); 741 742 int acpi_unmap_cpu(int cpu) 743 { 744 #ifdef CONFIG_ACPI_NUMA 745 set_apicid_to_node(per_cpu(x86_cpu_to_apicid, cpu), NUMA_NO_NODE); 746 #endif 747 748 per_cpu(x86_cpu_to_apicid, cpu) = -1; 749 set_cpu_present(cpu, false); 750 num_processors--; 751 752 return (0); 753 } 754 EXPORT_SYMBOL(acpi_unmap_cpu); 755 #endif /* CONFIG_ACPI_HOTPLUG_CPU */ 756 757 int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base) 758 { 759 int ret = -ENOSYS; 760 #ifdef CONFIG_ACPI_HOTPLUG_IOAPIC 761 int ioapic_id; 762 u64 addr; 763 struct ioapic_domain_cfg cfg = { 764 .type = IOAPIC_DOMAIN_DYNAMIC, 765 .ops = &mp_ioapic_irqdomain_ops, 766 }; 767 768 ioapic_id = acpi_get_ioapic_id(handle, gsi_base, &addr); 769 if (ioapic_id < 0) { 770 unsigned long long uid; 771 acpi_status status; 772 773 status = acpi_evaluate_integer(handle, METHOD_NAME__UID, 774 NULL, &uid); 775 if (ACPI_FAILURE(status)) { 776 acpi_handle_warn(handle, "failed to get IOAPIC ID.\n"); 777 return -EINVAL; 778 } 779 ioapic_id = (int)uid; 780 } 781 782 mutex_lock(&acpi_ioapic_lock); 783 ret = mp_register_ioapic(ioapic_id, phys_addr, gsi_base, &cfg); 784 mutex_unlock(&acpi_ioapic_lock); 785 #endif 786 787 return ret; 788 } 789 EXPORT_SYMBOL(acpi_register_ioapic); 790 791 int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base) 792 { 793 int ret = -ENOSYS; 794 795 #ifdef CONFIG_ACPI_HOTPLUG_IOAPIC 796 mutex_lock(&acpi_ioapic_lock); 797 ret = mp_unregister_ioapic(gsi_base); 798 mutex_unlock(&acpi_ioapic_lock); 799 #endif 800 801 return ret; 802 } 803 EXPORT_SYMBOL(acpi_unregister_ioapic); 804 805 /** 806 * acpi_ioapic_registered - Check whether IOAPIC assoicatied with @gsi_base 807 * has been registered 808 * @handle: ACPI handle of the IOAPIC deivce 809 * @gsi_base: GSI base associated with the IOAPIC 810 * 811 * Assume caller holds some type of lock to serialize acpi_ioapic_registered() 812 * with acpi_register_ioapic()/acpi_unregister_ioapic(). 813 */ 814 int acpi_ioapic_registered(acpi_handle handle, u32 gsi_base) 815 { 816 int ret = 0; 817 818 #ifdef CONFIG_ACPI_HOTPLUG_IOAPIC 819 mutex_lock(&acpi_ioapic_lock); 820 ret = mp_ioapic_registered(gsi_base); 821 mutex_unlock(&acpi_ioapic_lock); 822 #endif 823 824 return ret; 825 } 826 827 static int __init acpi_parse_sbf(struct acpi_table_header *table) 828 { 829 struct acpi_table_boot *sb = (struct acpi_table_boot *)table; 830 831 sbf_port = sb->cmos_index; /* Save CMOS port */ 832 833 return 0; 834 } 835 836 #ifdef CONFIG_HPET_TIMER 837 #include <asm/hpet.h> 838 839 static struct resource *hpet_res __initdata; 840 841 static int __init acpi_parse_hpet(struct acpi_table_header *table) 842 { 843 struct acpi_table_hpet *hpet_tbl = (struct acpi_table_hpet *)table; 844 845 if (hpet_tbl->address.space_id != ACPI_SPACE_MEM) { 846 printk(KERN_WARNING PREFIX "HPET timers must be located in " 847 "memory.\n"); 848 return -1; 849 } 850 851 hpet_address = hpet_tbl->address.address; 852 hpet_blockid = hpet_tbl->sequence; 853 854 /* 855 * Some broken BIOSes advertise HPET at 0x0. We really do not 856 * want to allocate a resource there. 857 */ 858 if (!hpet_address) { 859 printk(KERN_WARNING PREFIX 860 "HPET id: %#x base: %#lx is invalid\n", 861 hpet_tbl->id, hpet_address); 862 return 0; 863 } 864 #ifdef CONFIG_X86_64 865 /* 866 * Some even more broken BIOSes advertise HPET at 867 * 0xfed0000000000000 instead of 0xfed00000. Fix it up and add 868 * some noise: 869 */ 870 if (hpet_address == 0xfed0000000000000UL) { 871 if (!hpet_force_user) { 872 printk(KERN_WARNING PREFIX "HPET id: %#x " 873 "base: 0xfed0000000000000 is bogus\n " 874 "try hpet=force on the kernel command line to " 875 "fix it up to 0xfed00000.\n", hpet_tbl->id); 876 hpet_address = 0; 877 return 0; 878 } 879 printk(KERN_WARNING PREFIX 880 "HPET id: %#x base: 0xfed0000000000000 fixed up " 881 "to 0xfed00000.\n", hpet_tbl->id); 882 hpet_address >>= 32; 883 } 884 #endif 885 printk(KERN_INFO PREFIX "HPET id: %#x base: %#lx\n", 886 hpet_tbl->id, hpet_address); 887 888 /* 889 * Allocate and initialize the HPET firmware resource for adding into 890 * the resource tree during the lateinit timeframe. 891 */ 892 #define HPET_RESOURCE_NAME_SIZE 9 893 hpet_res = alloc_bootmem(sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE); 894 895 hpet_res->name = (void *)&hpet_res[1]; 896 hpet_res->flags = IORESOURCE_MEM; 897 snprintf((char *)hpet_res->name, HPET_RESOURCE_NAME_SIZE, "HPET %u", 898 hpet_tbl->sequence); 899 900 hpet_res->start = hpet_address; 901 hpet_res->end = hpet_address + (1 * 1024) - 1; 902 903 return 0; 904 } 905 906 /* 907 * hpet_insert_resource inserts the HPET resources used into the resource 908 * tree. 909 */ 910 static __init int hpet_insert_resource(void) 911 { 912 if (!hpet_res) 913 return 1; 914 915 return insert_resource(&iomem_resource, hpet_res); 916 } 917 918 late_initcall(hpet_insert_resource); 919 920 #else 921 #define acpi_parse_hpet NULL 922 #endif 923 924 static int __init acpi_parse_fadt(struct acpi_table_header *table) 925 { 926 if (!(acpi_gbl_FADT.boot_flags & ACPI_FADT_LEGACY_DEVICES)) { 927 pr_debug("ACPI: no legacy devices present\n"); 928 x86_platform.legacy.devices.pnpbios = 0; 929 } 930 931 if (acpi_gbl_FADT.boot_flags & ACPI_FADT_NO_CMOS_RTC) { 932 pr_debug("ACPI: not registering RTC platform device\n"); 933 x86_platform.legacy.rtc = 0; 934 } 935 936 #ifdef CONFIG_X86_PM_TIMER 937 /* detect the location of the ACPI PM Timer */ 938 if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID) { 939 /* FADT rev. 2 */ 940 if (acpi_gbl_FADT.xpm_timer_block.space_id != 941 ACPI_ADR_SPACE_SYSTEM_IO) 942 return 0; 943 944 pmtmr_ioport = acpi_gbl_FADT.xpm_timer_block.address; 945 /* 946 * "X" fields are optional extensions to the original V1.0 947 * fields, so we must selectively expand V1.0 fields if the 948 * corresponding X field is zero. 949 */ 950 if (!pmtmr_ioport) 951 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block; 952 } else { 953 /* FADT rev. 1 */ 954 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block; 955 } 956 if (pmtmr_ioport) 957 printk(KERN_INFO PREFIX "PM-Timer IO Port: %#x\n", 958 pmtmr_ioport); 959 #endif 960 return 0; 961 } 962 963 #ifdef CONFIG_X86_LOCAL_APIC 964 /* 965 * Parse LAPIC entries in MADT 966 * returns 0 on success, < 0 on error 967 */ 968 969 static int __init early_acpi_parse_madt_lapic_addr_ovr(void) 970 { 971 int count; 972 973 if (!boot_cpu_has(X86_FEATURE_APIC)) 974 return -ENODEV; 975 976 /* 977 * Note that the LAPIC address is obtained from the MADT (32-bit value) 978 * and (optionally) overridden by a LAPIC_ADDR_OVR entry (64-bit value). 979 */ 980 981 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE, 982 acpi_parse_lapic_addr_ovr, 0); 983 if (count < 0) { 984 printk(KERN_ERR PREFIX 985 "Error parsing LAPIC address override entry\n"); 986 return count; 987 } 988 989 register_lapic_address(acpi_lapic_addr); 990 991 return count; 992 } 993 994 static int __init acpi_parse_madt_lapic_entries(void) 995 { 996 int count; 997 int x2count = 0; 998 int ret; 999 struct acpi_subtable_proc madt_proc[2]; 1000 1001 if (!boot_cpu_has(X86_FEATURE_APIC)) 1002 return -ENODEV; 1003 1004 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC, 1005 acpi_parse_sapic, MAX_LOCAL_APIC); 1006 1007 if (!count) { 1008 memset(madt_proc, 0, sizeof(madt_proc)); 1009 madt_proc[0].id = ACPI_MADT_TYPE_LOCAL_APIC; 1010 madt_proc[0].handler = acpi_parse_lapic; 1011 madt_proc[1].id = ACPI_MADT_TYPE_LOCAL_X2APIC; 1012 madt_proc[1].handler = acpi_parse_x2apic; 1013 ret = acpi_table_parse_entries_array(ACPI_SIG_MADT, 1014 sizeof(struct acpi_table_madt), 1015 madt_proc, ARRAY_SIZE(madt_proc), MAX_LOCAL_APIC); 1016 if (ret < 0) { 1017 printk(KERN_ERR PREFIX 1018 "Error parsing LAPIC/X2APIC entries\n"); 1019 return ret; 1020 } 1021 1022 count = madt_proc[0].count; 1023 x2count = madt_proc[1].count; 1024 } 1025 if (!count && !x2count) { 1026 printk(KERN_ERR PREFIX "No LAPIC entries present\n"); 1027 /* TBD: Cleanup to allow fallback to MPS */ 1028 return -ENODEV; 1029 } else if (count < 0 || x2count < 0) { 1030 printk(KERN_ERR PREFIX "Error parsing LAPIC entry\n"); 1031 /* TBD: Cleanup to allow fallback to MPS */ 1032 return count; 1033 } 1034 1035 x2count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC_NMI, 1036 acpi_parse_x2apic_nmi, 0); 1037 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI, 1038 acpi_parse_lapic_nmi, 0); 1039 if (count < 0 || x2count < 0) { 1040 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n"); 1041 /* TBD: Cleanup to allow fallback to MPS */ 1042 return count; 1043 } 1044 return 0; 1045 } 1046 #endif /* CONFIG_X86_LOCAL_APIC */ 1047 1048 #ifdef CONFIG_X86_IO_APIC 1049 static void __init mp_config_acpi_legacy_irqs(void) 1050 { 1051 int i; 1052 struct mpc_intsrc mp_irq; 1053 1054 #ifdef CONFIG_EISA 1055 /* 1056 * Fabricate the legacy ISA bus (bus #31). 1057 */ 1058 mp_bus_id_to_type[MP_ISA_BUS] = MP_BUS_ISA; 1059 #endif 1060 set_bit(MP_ISA_BUS, mp_bus_not_pci); 1061 pr_debug("Bus #%d is ISA\n", MP_ISA_BUS); 1062 1063 /* 1064 * Use the default configuration for the IRQs 0-15. Unless 1065 * overridden by (MADT) interrupt source override entries. 1066 */ 1067 for (i = 0; i < nr_legacy_irqs(); i++) { 1068 int ioapic, pin; 1069 unsigned int dstapic; 1070 int idx; 1071 u32 gsi; 1072 1073 /* Locate the gsi that irq i maps to. */ 1074 if (acpi_isa_irq_to_gsi(i, &gsi)) 1075 continue; 1076 1077 /* 1078 * Locate the IOAPIC that manages the ISA IRQ. 1079 */ 1080 ioapic = mp_find_ioapic(gsi); 1081 if (ioapic < 0) 1082 continue; 1083 pin = mp_find_ioapic_pin(ioapic, gsi); 1084 dstapic = mpc_ioapic_id(ioapic); 1085 1086 for (idx = 0; idx < mp_irq_entries; idx++) { 1087 struct mpc_intsrc *irq = mp_irqs + idx; 1088 1089 /* Do we already have a mapping for this ISA IRQ? */ 1090 if (irq->srcbus == MP_ISA_BUS && irq->srcbusirq == i) 1091 break; 1092 1093 /* Do we already have a mapping for this IOAPIC pin */ 1094 if (irq->dstapic == dstapic && irq->dstirq == pin) 1095 break; 1096 } 1097 1098 if (idx != mp_irq_entries) { 1099 printk(KERN_DEBUG "ACPI: IRQ%d used by override.\n", i); 1100 continue; /* IRQ already used */ 1101 } 1102 1103 mp_irq.type = MP_INTSRC; 1104 mp_irq.irqflag = 0; /* Conforming */ 1105 mp_irq.srcbus = MP_ISA_BUS; 1106 mp_irq.dstapic = dstapic; 1107 mp_irq.irqtype = mp_INT; 1108 mp_irq.srcbusirq = i; /* Identity mapped */ 1109 mp_irq.dstirq = pin; 1110 1111 mp_save_irq(&mp_irq); 1112 } 1113 } 1114 1115 /* 1116 * Parse IOAPIC related entries in MADT 1117 * returns 0 on success, < 0 on error 1118 */ 1119 static int __init acpi_parse_madt_ioapic_entries(void) 1120 { 1121 int count; 1122 1123 /* 1124 * ACPI interpreter is required to complete interrupt setup, 1125 * so if it is off, don't enumerate the io-apics with ACPI. 1126 * If MPS is present, it will handle them, 1127 * otherwise the system will stay in PIC mode 1128 */ 1129 if (acpi_disabled || acpi_noirq) 1130 return -ENODEV; 1131 1132 if (!boot_cpu_has(X86_FEATURE_APIC)) 1133 return -ENODEV; 1134 1135 /* 1136 * if "noapic" boot option, don't look for IO-APICs 1137 */ 1138 if (skip_ioapic_setup) { 1139 printk(KERN_INFO PREFIX "Skipping IOAPIC probe " 1140 "due to 'noapic' option.\n"); 1141 return -ENODEV; 1142 } 1143 1144 count = acpi_table_parse_madt(ACPI_MADT_TYPE_IO_APIC, acpi_parse_ioapic, 1145 MAX_IO_APICS); 1146 if (!count) { 1147 printk(KERN_ERR PREFIX "No IOAPIC entries present\n"); 1148 return -ENODEV; 1149 } else if (count < 0) { 1150 printk(KERN_ERR PREFIX "Error parsing IOAPIC entry\n"); 1151 return count; 1152 } 1153 1154 count = acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE, 1155 acpi_parse_int_src_ovr, nr_irqs); 1156 if (count < 0) { 1157 printk(KERN_ERR PREFIX 1158 "Error parsing interrupt source overrides entry\n"); 1159 /* TBD: Cleanup to allow fallback to MPS */ 1160 return count; 1161 } 1162 1163 /* 1164 * If BIOS did not supply an INT_SRC_OVR for the SCI 1165 * pretend we got one so we can set the SCI flags. 1166 */ 1167 if (!acpi_sci_override_gsi) 1168 acpi_sci_ioapic_setup(acpi_gbl_FADT.sci_interrupt, 0, 0, 1169 acpi_gbl_FADT.sci_interrupt); 1170 1171 /* Fill in identity legacy mappings where no override */ 1172 mp_config_acpi_legacy_irqs(); 1173 1174 count = acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE, 1175 acpi_parse_nmi_src, nr_irqs); 1176 if (count < 0) { 1177 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n"); 1178 /* TBD: Cleanup to allow fallback to MPS */ 1179 return count; 1180 } 1181 1182 return 0; 1183 } 1184 #else 1185 static inline int acpi_parse_madt_ioapic_entries(void) 1186 { 1187 return -1; 1188 } 1189 #endif /* !CONFIG_X86_IO_APIC */ 1190 1191 static void __init early_acpi_process_madt(void) 1192 { 1193 #ifdef CONFIG_X86_LOCAL_APIC 1194 int error; 1195 1196 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) { 1197 1198 /* 1199 * Parse MADT LAPIC entries 1200 */ 1201 error = early_acpi_parse_madt_lapic_addr_ovr(); 1202 if (!error) { 1203 acpi_lapic = 1; 1204 smp_found_config = 1; 1205 } 1206 if (error == -EINVAL) { 1207 /* 1208 * Dell Precision Workstation 410, 610 come here. 1209 */ 1210 printk(KERN_ERR PREFIX 1211 "Invalid BIOS MADT, disabling ACPI\n"); 1212 disable_acpi(); 1213 } 1214 } 1215 #endif 1216 } 1217 1218 static void __init acpi_process_madt(void) 1219 { 1220 #ifdef CONFIG_X86_LOCAL_APIC 1221 int error; 1222 1223 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) { 1224 1225 /* 1226 * Parse MADT LAPIC entries 1227 */ 1228 error = acpi_parse_madt_lapic_entries(); 1229 if (!error) { 1230 acpi_lapic = 1; 1231 1232 /* 1233 * Parse MADT IO-APIC entries 1234 */ 1235 mutex_lock(&acpi_ioapic_lock); 1236 error = acpi_parse_madt_ioapic_entries(); 1237 mutex_unlock(&acpi_ioapic_lock); 1238 if (!error) { 1239 acpi_set_irq_model_ioapic(); 1240 1241 smp_found_config = 1; 1242 } 1243 } 1244 if (error == -EINVAL) { 1245 /* 1246 * Dell Precision Workstation 410, 610 come here. 1247 */ 1248 printk(KERN_ERR PREFIX 1249 "Invalid BIOS MADT, disabling ACPI\n"); 1250 disable_acpi(); 1251 } 1252 } else { 1253 /* 1254 * ACPI found no MADT, and so ACPI wants UP PIC mode. 1255 * In the event an MPS table was found, forget it. 1256 * Boot with "acpi=off" to use MPS on such a system. 1257 */ 1258 if (smp_found_config) { 1259 printk(KERN_WARNING PREFIX 1260 "No APIC-table, disabling MPS\n"); 1261 smp_found_config = 0; 1262 } 1263 } 1264 1265 /* 1266 * ACPI supports both logical (e.g. Hyper-Threading) and physical 1267 * processors, where MPS only supports physical. 1268 */ 1269 if (acpi_lapic && acpi_ioapic) 1270 printk(KERN_INFO "Using ACPI (MADT) for SMP configuration " 1271 "information\n"); 1272 else if (acpi_lapic) 1273 printk(KERN_INFO "Using ACPI for processor (LAPIC) " 1274 "configuration information\n"); 1275 #endif 1276 return; 1277 } 1278 1279 static int __init disable_acpi_irq(const struct dmi_system_id *d) 1280 { 1281 if (!acpi_force) { 1282 printk(KERN_NOTICE "%s detected: force use of acpi=noirq\n", 1283 d->ident); 1284 acpi_noirq_set(); 1285 } 1286 return 0; 1287 } 1288 1289 static int __init disable_acpi_pci(const struct dmi_system_id *d) 1290 { 1291 if (!acpi_force) { 1292 printk(KERN_NOTICE "%s detected: force use of pci=noacpi\n", 1293 d->ident); 1294 acpi_disable_pci(); 1295 } 1296 return 0; 1297 } 1298 1299 static int __init dmi_disable_acpi(const struct dmi_system_id *d) 1300 { 1301 if (!acpi_force) { 1302 printk(KERN_NOTICE "%s detected: acpi off\n", d->ident); 1303 disable_acpi(); 1304 } else { 1305 printk(KERN_NOTICE 1306 "Warning: DMI blacklist says broken, but acpi forced\n"); 1307 } 1308 return 0; 1309 } 1310 1311 /* 1312 * Force ignoring BIOS IRQ0 override 1313 */ 1314 static int __init dmi_ignore_irq0_timer_override(const struct dmi_system_id *d) 1315 { 1316 if (!acpi_skip_timer_override) { 1317 pr_notice("%s detected: Ignoring BIOS IRQ0 override\n", 1318 d->ident); 1319 acpi_skip_timer_override = 1; 1320 } 1321 return 0; 1322 } 1323 1324 /* 1325 * ACPI offers an alternative platform interface model that removes 1326 * ACPI hardware requirements for platforms that do not implement 1327 * the PC Architecture. 1328 * 1329 * We initialize the Hardware-reduced ACPI model here: 1330 */ 1331 static void __init acpi_reduced_hw_init(void) 1332 { 1333 if (acpi_gbl_reduced_hardware) { 1334 /* 1335 * Override x86_init functions and bypass legacy pic 1336 * in Hardware-reduced ACPI mode 1337 */ 1338 x86_init.timers.timer_init = x86_init_noop; 1339 x86_init.irqs.pre_vector_init = x86_init_noop; 1340 legacy_pic = &null_legacy_pic; 1341 } 1342 } 1343 1344 /* 1345 * If your system is blacklisted here, but you find that acpi=force 1346 * works for you, please contact linux-acpi@vger.kernel.org 1347 */ 1348 static struct dmi_system_id __initdata acpi_dmi_table[] = { 1349 /* 1350 * Boxes that need ACPI disabled 1351 */ 1352 { 1353 .callback = dmi_disable_acpi, 1354 .ident = "IBM Thinkpad", 1355 .matches = { 1356 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), 1357 DMI_MATCH(DMI_BOARD_NAME, "2629H1G"), 1358 }, 1359 }, 1360 1361 /* 1362 * Boxes that need ACPI PCI IRQ routing disabled 1363 */ 1364 { 1365 .callback = disable_acpi_irq, 1366 .ident = "ASUS A7V", 1367 .matches = { 1368 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC"), 1369 DMI_MATCH(DMI_BOARD_NAME, "<A7V>"), 1370 /* newer BIOS, Revision 1011, does work */ 1371 DMI_MATCH(DMI_BIOS_VERSION, 1372 "ASUS A7V ACPI BIOS Revision 1007"), 1373 }, 1374 }, 1375 { 1376 /* 1377 * Latest BIOS for IBM 600E (1.16) has bad pcinum 1378 * for LPC bridge, which is needed for the PCI 1379 * interrupt links to work. DSDT fix is in bug 5966. 1380 * 2645, 2646 model numbers are shared with 600/600E/600X 1381 */ 1382 .callback = disable_acpi_irq, 1383 .ident = "IBM Thinkpad 600 Series 2645", 1384 .matches = { 1385 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), 1386 DMI_MATCH(DMI_BOARD_NAME, "2645"), 1387 }, 1388 }, 1389 { 1390 .callback = disable_acpi_irq, 1391 .ident = "IBM Thinkpad 600 Series 2646", 1392 .matches = { 1393 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), 1394 DMI_MATCH(DMI_BOARD_NAME, "2646"), 1395 }, 1396 }, 1397 /* 1398 * Boxes that need ACPI PCI IRQ routing and PCI scan disabled 1399 */ 1400 { /* _BBN 0 bug */ 1401 .callback = disable_acpi_pci, 1402 .ident = "ASUS PR-DLS", 1403 .matches = { 1404 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."), 1405 DMI_MATCH(DMI_BOARD_NAME, "PR-DLS"), 1406 DMI_MATCH(DMI_BIOS_VERSION, 1407 "ASUS PR-DLS ACPI BIOS Revision 1010"), 1408 DMI_MATCH(DMI_BIOS_DATE, "03/21/2003") 1409 }, 1410 }, 1411 { 1412 .callback = disable_acpi_pci, 1413 .ident = "Acer TravelMate 36x Laptop", 1414 .matches = { 1415 DMI_MATCH(DMI_SYS_VENDOR, "Acer"), 1416 DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"), 1417 }, 1418 }, 1419 {} 1420 }; 1421 1422 /* second table for DMI checks that should run after early-quirks */ 1423 static struct dmi_system_id __initdata acpi_dmi_table_late[] = { 1424 /* 1425 * HP laptops which use a DSDT reporting as HP/SB400/10000, 1426 * which includes some code which overrides all temperature 1427 * trip points to 16C if the INTIN2 input of the I/O APIC 1428 * is enabled. This input is incorrectly designated the 1429 * ISA IRQ 0 via an interrupt source override even though 1430 * it is wired to the output of the master 8259A and INTIN0 1431 * is not connected at all. Force ignoring BIOS IRQ0 1432 * override in that cases. 1433 */ 1434 { 1435 .callback = dmi_ignore_irq0_timer_override, 1436 .ident = "HP nx6115 laptop", 1437 .matches = { 1438 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 1439 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6115"), 1440 }, 1441 }, 1442 { 1443 .callback = dmi_ignore_irq0_timer_override, 1444 .ident = "HP NX6125 laptop", 1445 .matches = { 1446 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 1447 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6125"), 1448 }, 1449 }, 1450 { 1451 .callback = dmi_ignore_irq0_timer_override, 1452 .ident = "HP NX6325 laptop", 1453 .matches = { 1454 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 1455 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6325"), 1456 }, 1457 }, 1458 { 1459 .callback = dmi_ignore_irq0_timer_override, 1460 .ident = "HP 6715b laptop", 1461 .matches = { 1462 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 1463 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq 6715b"), 1464 }, 1465 }, 1466 { 1467 .callback = dmi_ignore_irq0_timer_override, 1468 .ident = "FUJITSU SIEMENS", 1469 .matches = { 1470 DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"), 1471 DMI_MATCH(DMI_PRODUCT_NAME, "AMILO PRO V2030"), 1472 }, 1473 }, 1474 {} 1475 }; 1476 1477 /* 1478 * acpi_boot_table_init() and acpi_boot_init() 1479 * called from setup_arch(), always. 1480 * 1. checksums all tables 1481 * 2. enumerates lapics 1482 * 3. enumerates io-apics 1483 * 1484 * acpi_table_init() is separate to allow reading SRAT without 1485 * other side effects. 1486 * 1487 * side effects of acpi_boot_init: 1488 * acpi_lapic = 1 if LAPIC found 1489 * acpi_ioapic = 1 if IOAPIC found 1490 * if (acpi_lapic && acpi_ioapic) smp_found_config = 1; 1491 * if acpi_blacklisted() acpi_disabled = 1; 1492 * acpi_irq_model=... 1493 * ... 1494 */ 1495 1496 void __init acpi_boot_table_init(void) 1497 { 1498 dmi_check_system(acpi_dmi_table); 1499 1500 /* 1501 * If acpi_disabled, bail out 1502 */ 1503 if (acpi_disabled) 1504 return; 1505 1506 /* 1507 * Initialize the ACPI boot-time table parser. 1508 */ 1509 if (acpi_table_init()) { 1510 disable_acpi(); 1511 return; 1512 } 1513 1514 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf); 1515 1516 /* 1517 * blacklist may disable ACPI entirely 1518 */ 1519 if (acpi_blacklisted()) { 1520 if (acpi_force) { 1521 printk(KERN_WARNING PREFIX "acpi=force override\n"); 1522 } else { 1523 printk(KERN_WARNING PREFIX "Disabling ACPI support\n"); 1524 disable_acpi(); 1525 return; 1526 } 1527 } 1528 } 1529 1530 int __init early_acpi_boot_init(void) 1531 { 1532 /* 1533 * If acpi_disabled, bail out 1534 */ 1535 if (acpi_disabled) 1536 return 1; 1537 1538 /* 1539 * Process the Multiple APIC Description Table (MADT), if present 1540 */ 1541 early_acpi_process_madt(); 1542 1543 /* 1544 * Hardware-reduced ACPI mode initialization: 1545 */ 1546 acpi_reduced_hw_init(); 1547 1548 return 0; 1549 } 1550 1551 int __init acpi_boot_init(void) 1552 { 1553 /* those are executed after early-quirks are executed */ 1554 dmi_check_system(acpi_dmi_table_late); 1555 1556 /* 1557 * If acpi_disabled, bail out 1558 */ 1559 if (acpi_disabled) 1560 return 1; 1561 1562 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf); 1563 1564 /* 1565 * set sci_int and PM timer address 1566 */ 1567 acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt); 1568 1569 /* 1570 * Process the Multiple APIC Description Table (MADT), if present 1571 */ 1572 acpi_process_madt(); 1573 1574 acpi_table_parse(ACPI_SIG_HPET, acpi_parse_hpet); 1575 1576 if (!acpi_noirq) 1577 x86_init.pci.init = pci_acpi_init; 1578 1579 return 0; 1580 } 1581 1582 static int __init parse_acpi(char *arg) 1583 { 1584 if (!arg) 1585 return -EINVAL; 1586 1587 /* "acpi=off" disables both ACPI table parsing and interpreter */ 1588 if (strcmp(arg, "off") == 0) { 1589 disable_acpi(); 1590 } 1591 /* acpi=force to over-ride black-list */ 1592 else if (strcmp(arg, "force") == 0) { 1593 acpi_force = 1; 1594 acpi_disabled = 0; 1595 } 1596 /* acpi=strict disables out-of-spec workarounds */ 1597 else if (strcmp(arg, "strict") == 0) { 1598 acpi_strict = 1; 1599 } 1600 /* acpi=rsdt use RSDT instead of XSDT */ 1601 else if (strcmp(arg, "rsdt") == 0) { 1602 acpi_gbl_do_not_use_xsdt = TRUE; 1603 } 1604 /* "acpi=noirq" disables ACPI interrupt routing */ 1605 else if (strcmp(arg, "noirq") == 0) { 1606 acpi_noirq_set(); 1607 } 1608 /* "acpi=copy_dsdt" copys DSDT */ 1609 else if (strcmp(arg, "copy_dsdt") == 0) { 1610 acpi_gbl_copy_dsdt_locally = 1; 1611 } 1612 /* "acpi=nocmcff" disables FF mode for corrected errors */ 1613 else if (strcmp(arg, "nocmcff") == 0) { 1614 acpi_disable_cmcff = 1; 1615 } else { 1616 /* Core will printk when we return error. */ 1617 return -EINVAL; 1618 } 1619 return 0; 1620 } 1621 early_param("acpi", parse_acpi); 1622 1623 /* FIXME: Using pci= for an ACPI parameter is a travesty. */ 1624 static int __init parse_pci(char *arg) 1625 { 1626 if (arg && strcmp(arg, "noacpi") == 0) 1627 acpi_disable_pci(); 1628 return 0; 1629 } 1630 early_param("pci", parse_pci); 1631 1632 int __init acpi_mps_check(void) 1633 { 1634 #if defined(CONFIG_X86_LOCAL_APIC) && !defined(CONFIG_X86_MPPARSE) 1635 /* mptable code is not built-in*/ 1636 if (acpi_disabled || acpi_noirq) { 1637 printk(KERN_WARNING "MPS support code is not built-in.\n" 1638 "Using acpi=off or acpi=noirq or pci=noacpi " 1639 "may have problem\n"); 1640 return 1; 1641 } 1642 #endif 1643 return 0; 1644 } 1645 1646 #ifdef CONFIG_X86_IO_APIC 1647 static int __init parse_acpi_skip_timer_override(char *arg) 1648 { 1649 acpi_skip_timer_override = 1; 1650 return 0; 1651 } 1652 early_param("acpi_skip_timer_override", parse_acpi_skip_timer_override); 1653 1654 static int __init parse_acpi_use_timer_override(char *arg) 1655 { 1656 acpi_use_timer_override = 1; 1657 return 0; 1658 } 1659 early_param("acpi_use_timer_override", parse_acpi_use_timer_override); 1660 #endif /* CONFIG_X86_IO_APIC */ 1661 1662 static int __init setup_acpi_sci(char *s) 1663 { 1664 if (!s) 1665 return -EINVAL; 1666 if (!strcmp(s, "edge")) 1667 acpi_sci_flags = ACPI_MADT_TRIGGER_EDGE | 1668 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK); 1669 else if (!strcmp(s, "level")) 1670 acpi_sci_flags = ACPI_MADT_TRIGGER_LEVEL | 1671 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK); 1672 else if (!strcmp(s, "high")) 1673 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_HIGH | 1674 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK); 1675 else if (!strcmp(s, "low")) 1676 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_LOW | 1677 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK); 1678 else 1679 return -EINVAL; 1680 return 0; 1681 } 1682 early_param("acpi_sci", setup_acpi_sci); 1683 1684 int __acpi_acquire_global_lock(unsigned int *lock) 1685 { 1686 unsigned int old, new, val; 1687 do { 1688 old = *lock; 1689 new = (((old & ~0x3) + 2) + ((old >> 1) & 0x1)); 1690 val = cmpxchg(lock, old, new); 1691 } while (unlikely (val != old)); 1692 return (new < 3) ? -1 : 0; 1693 } 1694 1695 int __acpi_release_global_lock(unsigned int *lock) 1696 { 1697 unsigned int old, new, val; 1698 do { 1699 old = *lock; 1700 new = old & ~0x3; 1701 val = cmpxchg(lock, old, new); 1702 } while (unlikely (val != old)); 1703 return old & 0x1; 1704 } 1705 1706 void __init arch_reserve_mem_area(acpi_physical_address addr, size_t size) 1707 { 1708 e820_add_region(addr, size, E820_ACPI); 1709 update_e820(); 1710 } 1711