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