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