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 #include <linux/efi-bgrt.h> 39 40 #include <asm/e820/api.h> 41 #include <asm/irqdomain.h> 42 #include <asm/pci_x86.h> 43 #include <asm/pgtable.h> 44 #include <asm/io_apic.h> 45 #include <asm/apic.h> 46 #include <asm/io.h> 47 #include <asm/mpspec.h> 48 #include <asm/smp.h> 49 #include <asm/i8259.h> 50 51 #include "sleep.h" /* To include x86_acpi_suspend_lowlevel */ 52 static int __initdata acpi_force = 0; 53 int acpi_disabled; 54 EXPORT_SYMBOL(acpi_disabled); 55 56 #ifdef CONFIG_X86_64 57 # include <asm/proto.h> 58 #endif /* X86 */ 59 60 #define PREFIX "ACPI: " 61 62 int acpi_noirq; /* skip ACPI IRQ initialization */ 63 int acpi_pci_disabled; /* skip ACPI PCI scan and IRQ initialization */ 64 EXPORT_SYMBOL(acpi_pci_disabled); 65 66 int acpi_lapic; 67 int acpi_ioapic; 68 int acpi_strict; 69 int acpi_disable_cmcff; 70 71 u8 acpi_sci_flags __initdata; 72 int acpi_sci_override_gsi __initdata; 73 int acpi_skip_timer_override __initdata; 74 int acpi_use_timer_override __initdata; 75 int acpi_fix_pin2_polarity __initdata; 76 77 #ifdef CONFIG_X86_LOCAL_APIC 78 static u64 acpi_lapic_addr __initdata = APIC_DEFAULT_PHYS_BASE; 79 #endif 80 81 #ifdef CONFIG_X86_IO_APIC 82 /* 83 * Locks related to IOAPIC hotplug 84 * Hotplug side: 85 * ->device_hotplug_lock 86 * ->acpi_ioapic_lock 87 * ->ioapic_lock 88 * Interrupt mapping side: 89 * ->acpi_ioapic_lock 90 * ->ioapic_mutex 91 * ->ioapic_lock 92 */ 93 static DEFINE_MUTEX(acpi_ioapic_lock); 94 #endif 95 96 /* -------------------------------------------------------------------------- 97 Boot-time Configuration 98 -------------------------------------------------------------------------- */ 99 100 /* 101 * The default interrupt routing model is PIC (8259). This gets 102 * overridden if IOAPICs are enumerated (below). 103 */ 104 enum acpi_irq_model_id acpi_irq_model = ACPI_IRQ_MODEL_PIC; 105 106 107 /* 108 * ISA irqs by default are the first 16 gsis but can be 109 * any gsi as specified by an interrupt source override. 110 */ 111 static u32 isa_irq_to_gsi[NR_IRQS_LEGACY] __read_mostly = { 112 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 113 }; 114 115 #define ACPI_INVALID_GSI INT_MIN 116 117 /* 118 * This is just a simple wrapper around early_memremap(), 119 * with sanity checks for phys == 0 and size == 0. 120 */ 121 void __init __iomem *__acpi_map_table(unsigned long phys, unsigned long size) 122 { 123 124 if (!phys || !size) 125 return NULL; 126 127 return early_memremap(phys, size); 128 } 129 130 void __init __acpi_unmap_table(void __iomem *map, unsigned long size) 131 { 132 if (!map || !size) 133 return; 134 135 early_memunmap(map, size); 136 } 137 138 #ifdef CONFIG_X86_LOCAL_APIC 139 static int __init acpi_parse_madt(struct acpi_table_header *table) 140 { 141 struct acpi_table_madt *madt = NULL; 142 143 if (!boot_cpu_has(X86_FEATURE_APIC)) 144 return -EINVAL; 145 146 madt = (struct acpi_table_madt *)table; 147 if (!madt) { 148 printk(KERN_WARNING PREFIX "Unable to map MADT\n"); 149 return -ENODEV; 150 } 151 152 if (madt->address) { 153 acpi_lapic_addr = (u64) madt->address; 154 155 printk(KERN_DEBUG PREFIX "Local APIC address 0x%08x\n", 156 madt->address); 157 } 158 159 default_acpi_madt_oem_check(madt->header.oem_id, 160 madt->header.oem_table_id); 161 162 return 0; 163 } 164 165 /** 166 * acpi_register_lapic - register a local apic and generates a logic cpu number 167 * @id: local apic id to register 168 * @acpiid: ACPI id to register 169 * @enabled: this cpu is enabled or not 170 * 171 * Returns the logic cpu number which maps to the local apic 172 */ 173 static int acpi_register_lapic(int id, u32 acpiid, u8 enabled) 174 { 175 unsigned int ver = 0; 176 int cpu; 177 178 if (id >= MAX_LOCAL_APIC) { 179 printk(KERN_INFO PREFIX "skipped apicid that is too big\n"); 180 return -EINVAL; 181 } 182 183 if (!enabled) { 184 ++disabled_cpus; 185 return -EINVAL; 186 } 187 188 if (boot_cpu_physical_apicid != -1U) 189 ver = boot_cpu_apic_version; 190 191 cpu = generic_processor_info(id, ver); 192 if (cpu >= 0) 193 early_per_cpu(x86_cpu_to_acpiid, cpu) = acpiid; 194 195 return cpu; 196 } 197 198 static int __init 199 acpi_parse_x2apic(struct acpi_subtable_header *header, const unsigned long end) 200 { 201 struct acpi_madt_local_x2apic *processor = NULL; 202 #ifdef CONFIG_X86_X2APIC 203 int apic_id; 204 u8 enabled; 205 #endif 206 207 processor = (struct acpi_madt_local_x2apic *)header; 208 209 if (BAD_MADT_ENTRY(processor, end)) 210 return -EINVAL; 211 212 acpi_table_print_madt_entry(header); 213 214 #ifdef CONFIG_X86_X2APIC 215 apic_id = processor->local_apic_id; 216 enabled = processor->lapic_flags & ACPI_MADT_ENABLED; 217 218 /* 219 * We need to register disabled CPU as well to permit 220 * counting disabled CPUs. This allows us to size 221 * cpus_possible_map more accurately, to permit 222 * to not preallocating memory for all NR_CPUS 223 * when we use CPU hotplug. 224 */ 225 if (!apic->apic_id_valid(apic_id) && enabled) 226 printk(KERN_WARNING PREFIX "x2apic entry ignored\n"); 227 else 228 acpi_register_lapic(apic_id, processor->uid, enabled); 229 #else 230 printk(KERN_WARNING PREFIX "x2apic entry ignored\n"); 231 #endif 232 233 return 0; 234 } 235 236 static int __init 237 acpi_parse_lapic(struct acpi_subtable_header * header, const unsigned long end) 238 { 239 struct acpi_madt_local_apic *processor = NULL; 240 241 processor = (struct acpi_madt_local_apic *)header; 242 243 if (BAD_MADT_ENTRY(processor, end)) 244 return -EINVAL; 245 246 acpi_table_print_madt_entry(header); 247 248 /* Ignore invalid ID */ 249 if (processor->id == 0xff) 250 return 0; 251 252 /* 253 * We need to register disabled CPU as well to permit 254 * counting disabled CPUs. This allows us to size 255 * cpus_possible_map more accurately, to permit 256 * to not preallocating memory for all NR_CPUS 257 * when we use CPU hotplug. 258 */ 259 acpi_register_lapic(processor->id, /* APIC ID */ 260 processor->processor_id, /* ACPI ID */ 261 processor->lapic_flags & ACPI_MADT_ENABLED); 262 263 return 0; 264 } 265 266 static int __init 267 acpi_parse_sapic(struct acpi_subtable_header *header, const unsigned long end) 268 { 269 struct acpi_madt_local_sapic *processor = NULL; 270 271 processor = (struct acpi_madt_local_sapic *)header; 272 273 if (BAD_MADT_ENTRY(processor, end)) 274 return -EINVAL; 275 276 acpi_table_print_madt_entry(header); 277 278 acpi_register_lapic((processor->id << 8) | processor->eid,/* APIC ID */ 279 processor->processor_id, /* ACPI ID */ 280 processor->lapic_flags & ACPI_MADT_ENABLED); 281 282 return 0; 283 } 284 285 static int __init 286 acpi_parse_lapic_addr_ovr(struct acpi_subtable_header * header, 287 const unsigned long end) 288 { 289 struct acpi_madt_local_apic_override *lapic_addr_ovr = NULL; 290 291 lapic_addr_ovr = (struct acpi_madt_local_apic_override *)header; 292 293 if (BAD_MADT_ENTRY(lapic_addr_ovr, end)) 294 return -EINVAL; 295 296 acpi_table_print_madt_entry(header); 297 298 acpi_lapic_addr = lapic_addr_ovr->address; 299 300 return 0; 301 } 302 303 static int __init 304 acpi_parse_x2apic_nmi(struct acpi_subtable_header *header, 305 const unsigned long end) 306 { 307 struct acpi_madt_local_x2apic_nmi *x2apic_nmi = NULL; 308 309 x2apic_nmi = (struct acpi_madt_local_x2apic_nmi *)header; 310 311 if (BAD_MADT_ENTRY(x2apic_nmi, end)) 312 return -EINVAL; 313 314 acpi_table_print_madt_entry(header); 315 316 if (x2apic_nmi->lint != 1) 317 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n"); 318 319 return 0; 320 } 321 322 static int __init 323 acpi_parse_lapic_nmi(struct acpi_subtable_header * header, const unsigned long end) 324 { 325 struct acpi_madt_local_apic_nmi *lapic_nmi = NULL; 326 327 lapic_nmi = (struct acpi_madt_local_apic_nmi *)header; 328 329 if (BAD_MADT_ENTRY(lapic_nmi, end)) 330 return -EINVAL; 331 332 acpi_table_print_madt_entry(header); 333 334 if (lapic_nmi->lint != 1) 335 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n"); 336 337 return 0; 338 } 339 340 #endif /*CONFIG_X86_LOCAL_APIC */ 341 342 #ifdef CONFIG_X86_IO_APIC 343 #define MP_ISA_BUS 0 344 345 static void __init mp_override_legacy_irq(u8 bus_irq, u8 polarity, u8 trigger, 346 u32 gsi) 347 { 348 int ioapic; 349 int pin; 350 struct mpc_intsrc mp_irq; 351 352 /* 353 * Check bus_irq boundary. 354 */ 355 if (bus_irq >= NR_IRQS_LEGACY) { 356 pr_warn("Invalid bus_irq %u for legacy override\n", bus_irq); 357 return; 358 } 359 360 /* 361 * Convert 'gsi' to 'ioapic.pin'. 362 */ 363 ioapic = mp_find_ioapic(gsi); 364 if (ioapic < 0) 365 return; 366 pin = mp_find_ioapic_pin(ioapic, gsi); 367 368 /* 369 * TBD: This check is for faulty timer entries, where the override 370 * erroneously sets the trigger to level, resulting in a HUGE 371 * increase of timer interrupts! 372 */ 373 if ((bus_irq == 0) && (trigger == 3)) 374 trigger = 1; 375 376 mp_irq.type = MP_INTSRC; 377 mp_irq.irqtype = mp_INT; 378 mp_irq.irqflag = (trigger << 2) | polarity; 379 mp_irq.srcbus = MP_ISA_BUS; 380 mp_irq.srcbusirq = bus_irq; /* IRQ */ 381 mp_irq.dstapic = mpc_ioapic_id(ioapic); /* APIC ID */ 382 mp_irq.dstirq = pin; /* INTIN# */ 383 384 mp_save_irq(&mp_irq); 385 386 /* 387 * Reset default identity mapping if gsi is also an legacy IRQ, 388 * otherwise there will be more than one entry with the same GSI 389 * and acpi_isa_irq_to_gsi() may give wrong result. 390 */ 391 if (gsi < nr_legacy_irqs() && isa_irq_to_gsi[gsi] == gsi) 392 isa_irq_to_gsi[gsi] = ACPI_INVALID_GSI; 393 isa_irq_to_gsi[bus_irq] = gsi; 394 } 395 396 static int mp_config_acpi_gsi(struct device *dev, u32 gsi, int trigger, 397 int polarity) 398 { 399 #ifdef CONFIG_X86_MPPARSE 400 struct mpc_intsrc mp_irq; 401 struct pci_dev *pdev; 402 unsigned char number; 403 unsigned int devfn; 404 int ioapic; 405 u8 pin; 406 407 if (!acpi_ioapic) 408 return 0; 409 if (!dev || !dev_is_pci(dev)) 410 return 0; 411 412 pdev = to_pci_dev(dev); 413 number = pdev->bus->number; 414 devfn = pdev->devfn; 415 pin = pdev->pin; 416 /* print the entry should happen on mptable identically */ 417 mp_irq.type = MP_INTSRC; 418 mp_irq.irqtype = mp_INT; 419 mp_irq.irqflag = (trigger == ACPI_EDGE_SENSITIVE ? 4 : 0x0c) | 420 (polarity == ACPI_ACTIVE_HIGH ? 1 : 3); 421 mp_irq.srcbus = number; 422 mp_irq.srcbusirq = (((devfn >> 3) & 0x1f) << 2) | ((pin - 1) & 3); 423 ioapic = mp_find_ioapic(gsi); 424 mp_irq.dstapic = mpc_ioapic_id(ioapic); 425 mp_irq.dstirq = mp_find_ioapic_pin(ioapic, gsi); 426 427 mp_save_irq(&mp_irq); 428 #endif 429 return 0; 430 } 431 432 static int __init 433 acpi_parse_ioapic(struct acpi_subtable_header * header, const unsigned long end) 434 { 435 struct acpi_madt_io_apic *ioapic = NULL; 436 struct ioapic_domain_cfg cfg = { 437 .type = IOAPIC_DOMAIN_DYNAMIC, 438 .ops = &mp_ioapic_irqdomain_ops, 439 }; 440 441 ioapic = (struct acpi_madt_io_apic *)header; 442 443 if (BAD_MADT_ENTRY(ioapic, end)) 444 return -EINVAL; 445 446 acpi_table_print_madt_entry(header); 447 448 /* Statically assign IRQ numbers for IOAPICs hosting legacy IRQs */ 449 if (ioapic->global_irq_base < nr_legacy_irqs()) 450 cfg.type = IOAPIC_DOMAIN_LEGACY; 451 452 mp_register_ioapic(ioapic->id, ioapic->address, ioapic->global_irq_base, 453 &cfg); 454 455 return 0; 456 } 457 458 /* 459 * Parse Interrupt Source Override for the ACPI SCI 460 */ 461 static void __init acpi_sci_ioapic_setup(u8 bus_irq, u16 polarity, u16 trigger, u32 gsi) 462 { 463 if (trigger == 0) /* compatible SCI trigger is level */ 464 trigger = 3; 465 466 if (polarity == 0) /* compatible SCI polarity is low */ 467 polarity = 3; 468 469 /* Command-line over-ride via acpi_sci= */ 470 if (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) 471 trigger = (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2; 472 473 if (acpi_sci_flags & ACPI_MADT_POLARITY_MASK) 474 polarity = acpi_sci_flags & ACPI_MADT_POLARITY_MASK; 475 476 mp_override_legacy_irq(bus_irq, polarity, trigger, gsi); 477 acpi_penalize_sci_irq(bus_irq, trigger, polarity); 478 479 /* 480 * stash over-ride to indicate we've been here 481 * and for later update of acpi_gbl_FADT 482 */ 483 acpi_sci_override_gsi = gsi; 484 return; 485 } 486 487 static int __init 488 acpi_parse_int_src_ovr(struct acpi_subtable_header * header, 489 const unsigned long end) 490 { 491 struct acpi_madt_interrupt_override *intsrc = NULL; 492 493 intsrc = (struct acpi_madt_interrupt_override *)header; 494 495 if (BAD_MADT_ENTRY(intsrc, end)) 496 return -EINVAL; 497 498 acpi_table_print_madt_entry(header); 499 500 if (intsrc->source_irq == acpi_gbl_FADT.sci_interrupt) { 501 acpi_sci_ioapic_setup(intsrc->source_irq, 502 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK, 503 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2, 504 intsrc->global_irq); 505 return 0; 506 } 507 508 if (intsrc->source_irq == 0) { 509 if (acpi_skip_timer_override) { 510 printk(PREFIX "BIOS IRQ0 override ignored.\n"); 511 return 0; 512 } 513 514 if ((intsrc->global_irq == 2) && acpi_fix_pin2_polarity 515 && (intsrc->inti_flags & ACPI_MADT_POLARITY_MASK)) { 516 intsrc->inti_flags &= ~ACPI_MADT_POLARITY_MASK; 517 printk(PREFIX "BIOS IRQ0 pin2 override: forcing polarity to high active.\n"); 518 } 519 } 520 521 mp_override_legacy_irq(intsrc->source_irq, 522 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK, 523 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2, 524 intsrc->global_irq); 525 526 return 0; 527 } 528 529 static int __init 530 acpi_parse_nmi_src(struct acpi_subtable_header * header, const unsigned long end) 531 { 532 struct acpi_madt_nmi_source *nmi_src = NULL; 533 534 nmi_src = (struct acpi_madt_nmi_source *)header; 535 536 if (BAD_MADT_ENTRY(nmi_src, end)) 537 return -EINVAL; 538 539 acpi_table_print_madt_entry(header); 540 541 /* TBD: Support nimsrc entries? */ 542 543 return 0; 544 } 545 546 #endif /* CONFIG_X86_IO_APIC */ 547 548 /* 549 * acpi_pic_sci_set_trigger() 550 * 551 * use ELCR to set PIC-mode trigger type for SCI 552 * 553 * If a PIC-mode SCI is not recognized or gives spurious IRQ7's 554 * it may require Edge Trigger -- use "acpi_sci=edge" 555 * 556 * Port 0x4d0-4d1 are ECLR1 and ECLR2, the Edge/Level Control Registers 557 * for the 8259 PIC. bit[n] = 1 means irq[n] is Level, otherwise Edge. 558 * ECLR1 is IRQs 0-7 (IRQ 0, 1, 2 must be 0) 559 * ECLR2 is IRQs 8-15 (IRQ 8, 13 must be 0) 560 */ 561 562 void __init acpi_pic_sci_set_trigger(unsigned int irq, u16 trigger) 563 { 564 unsigned int mask = 1 << irq; 565 unsigned int old, new; 566 567 /* Real old ELCR mask */ 568 old = inb(0x4d0) | (inb(0x4d1) << 8); 569 570 /* 571 * If we use ACPI to set PCI IRQs, then we should clear ELCR 572 * since we will set it correctly as we enable the PCI irq 573 * routing. 574 */ 575 new = acpi_noirq ? old : 0; 576 577 /* 578 * Update SCI information in the ELCR, it isn't in the PCI 579 * routing tables.. 580 */ 581 switch (trigger) { 582 case 1: /* Edge - clear */ 583 new &= ~mask; 584 break; 585 case 3: /* Level - set */ 586 new |= mask; 587 break; 588 } 589 590 if (old == new) 591 return; 592 593 printk(PREFIX "setting ELCR to %04x (from %04x)\n", new, old); 594 outb(new, 0x4d0); 595 outb(new >> 8, 0x4d1); 596 } 597 598 int acpi_gsi_to_irq(u32 gsi, unsigned int *irqp) 599 { 600 int rc, irq, trigger, polarity; 601 602 if (acpi_irq_model == ACPI_IRQ_MODEL_PIC) { 603 *irqp = gsi; 604 return 0; 605 } 606 607 rc = acpi_get_override_irq(gsi, &trigger, &polarity); 608 if (rc == 0) { 609 trigger = trigger ? ACPI_LEVEL_SENSITIVE : ACPI_EDGE_SENSITIVE; 610 polarity = polarity ? ACPI_ACTIVE_LOW : ACPI_ACTIVE_HIGH; 611 irq = acpi_register_gsi(NULL, gsi, trigger, polarity); 612 if (irq >= 0) { 613 *irqp = irq; 614 return 0; 615 } 616 } 617 618 return -1; 619 } 620 EXPORT_SYMBOL_GPL(acpi_gsi_to_irq); 621 622 int acpi_isa_irq_to_gsi(unsigned isa_irq, u32 *gsi) 623 { 624 if (isa_irq < nr_legacy_irqs() && 625 isa_irq_to_gsi[isa_irq] != ACPI_INVALID_GSI) { 626 *gsi = isa_irq_to_gsi[isa_irq]; 627 return 0; 628 } 629 630 return -1; 631 } 632 633 static int acpi_register_gsi_pic(struct device *dev, u32 gsi, 634 int trigger, int polarity) 635 { 636 #ifdef CONFIG_PCI 637 /* 638 * Make sure all (legacy) PCI IRQs are set as level-triggered. 639 */ 640 if (trigger == ACPI_LEVEL_SENSITIVE) 641 elcr_set_level_irq(gsi); 642 #endif 643 644 return gsi; 645 } 646 647 #ifdef CONFIG_X86_LOCAL_APIC 648 static int acpi_register_gsi_ioapic(struct device *dev, u32 gsi, 649 int trigger, int polarity) 650 { 651 int irq = gsi; 652 #ifdef CONFIG_X86_IO_APIC 653 int node; 654 struct irq_alloc_info info; 655 656 node = dev ? dev_to_node(dev) : NUMA_NO_NODE; 657 trigger = trigger == ACPI_EDGE_SENSITIVE ? 0 : 1; 658 polarity = polarity == ACPI_ACTIVE_HIGH ? 0 : 1; 659 ioapic_set_alloc_attr(&info, node, trigger, polarity); 660 661 mutex_lock(&acpi_ioapic_lock); 662 irq = mp_map_gsi_to_irq(gsi, IOAPIC_MAP_ALLOC, &info); 663 /* Don't set up the ACPI SCI because it's already set up */ 664 if (irq >= 0 && enable_update_mptable && 665 acpi_gbl_FADT.sci_interrupt != gsi) 666 mp_config_acpi_gsi(dev, gsi, trigger, polarity); 667 mutex_unlock(&acpi_ioapic_lock); 668 #endif 669 670 return irq; 671 } 672 673 static void acpi_unregister_gsi_ioapic(u32 gsi) 674 { 675 #ifdef CONFIG_X86_IO_APIC 676 int irq; 677 678 mutex_lock(&acpi_ioapic_lock); 679 irq = mp_map_gsi_to_irq(gsi, 0, NULL); 680 if (irq > 0) 681 mp_unmap_irq(irq); 682 mutex_unlock(&acpi_ioapic_lock); 683 #endif 684 } 685 #endif 686 687 int (*__acpi_register_gsi)(struct device *dev, u32 gsi, 688 int trigger, int polarity) = acpi_register_gsi_pic; 689 void (*__acpi_unregister_gsi)(u32 gsi) = NULL; 690 691 #ifdef CONFIG_ACPI_SLEEP 692 int (*acpi_suspend_lowlevel)(void) = x86_acpi_suspend_lowlevel; 693 #else 694 int (*acpi_suspend_lowlevel)(void); 695 #endif 696 697 /* 698 * success: return IRQ number (>=0) 699 * failure: return < 0 700 */ 701 int acpi_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity) 702 { 703 return __acpi_register_gsi(dev, gsi, trigger, polarity); 704 } 705 EXPORT_SYMBOL_GPL(acpi_register_gsi); 706 707 void acpi_unregister_gsi(u32 gsi) 708 { 709 if (__acpi_unregister_gsi) 710 __acpi_unregister_gsi(gsi); 711 } 712 EXPORT_SYMBOL_GPL(acpi_unregister_gsi); 713 714 #ifdef CONFIG_X86_LOCAL_APIC 715 static void __init acpi_set_irq_model_ioapic(void) 716 { 717 acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC; 718 __acpi_register_gsi = acpi_register_gsi_ioapic; 719 __acpi_unregister_gsi = acpi_unregister_gsi_ioapic; 720 acpi_ioapic = 1; 721 } 722 #endif 723 724 /* 725 * ACPI based hotplug support for CPU 726 */ 727 #ifdef CONFIG_ACPI_HOTPLUG_CPU 728 #include <acpi/processor.h> 729 730 static int acpi_map_cpu2node(acpi_handle handle, int cpu, int physid) 731 { 732 #ifdef CONFIG_ACPI_NUMA 733 int nid; 734 735 nid = acpi_get_node(handle); 736 if (nid != NUMA_NO_NODE) { 737 set_apicid_to_node(physid, nid); 738 numa_set_node(cpu, nid); 739 } 740 #endif 741 return 0; 742 } 743 744 int acpi_map_cpu(acpi_handle handle, phys_cpuid_t physid, u32 acpi_id, 745 int *pcpu) 746 { 747 int cpu; 748 749 cpu = acpi_register_lapic(physid, acpi_id, ACPI_MADT_ENABLED); 750 if (cpu < 0) { 751 pr_info(PREFIX "Unable to map lapic to logical cpu number\n"); 752 return cpu; 753 } 754 755 acpi_processor_set_pdc(handle); 756 acpi_map_cpu2node(handle, cpu, physid); 757 758 *pcpu = cpu; 759 return 0; 760 } 761 EXPORT_SYMBOL(acpi_map_cpu); 762 763 int acpi_unmap_cpu(int cpu) 764 { 765 #ifdef CONFIG_ACPI_NUMA 766 set_apicid_to_node(per_cpu(x86_cpu_to_apicid, cpu), NUMA_NO_NODE); 767 #endif 768 769 per_cpu(x86_cpu_to_apicid, cpu) = -1; 770 set_cpu_present(cpu, false); 771 num_processors--; 772 773 return (0); 774 } 775 EXPORT_SYMBOL(acpi_unmap_cpu); 776 #endif /* CONFIG_ACPI_HOTPLUG_CPU */ 777 778 int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base) 779 { 780 int ret = -ENOSYS; 781 #ifdef CONFIG_ACPI_HOTPLUG_IOAPIC 782 int ioapic_id; 783 u64 addr; 784 struct ioapic_domain_cfg cfg = { 785 .type = IOAPIC_DOMAIN_DYNAMIC, 786 .ops = &mp_ioapic_irqdomain_ops, 787 }; 788 789 ioapic_id = acpi_get_ioapic_id(handle, gsi_base, &addr); 790 if (ioapic_id < 0) { 791 unsigned long long uid; 792 acpi_status status; 793 794 status = acpi_evaluate_integer(handle, METHOD_NAME__UID, 795 NULL, &uid); 796 if (ACPI_FAILURE(status)) { 797 acpi_handle_warn(handle, "failed to get IOAPIC ID.\n"); 798 return -EINVAL; 799 } 800 ioapic_id = (int)uid; 801 } 802 803 mutex_lock(&acpi_ioapic_lock); 804 ret = mp_register_ioapic(ioapic_id, phys_addr, gsi_base, &cfg); 805 mutex_unlock(&acpi_ioapic_lock); 806 #endif 807 808 return ret; 809 } 810 EXPORT_SYMBOL(acpi_register_ioapic); 811 812 int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base) 813 { 814 int ret = -ENOSYS; 815 816 #ifdef CONFIG_ACPI_HOTPLUG_IOAPIC 817 mutex_lock(&acpi_ioapic_lock); 818 ret = mp_unregister_ioapic(gsi_base); 819 mutex_unlock(&acpi_ioapic_lock); 820 #endif 821 822 return ret; 823 } 824 EXPORT_SYMBOL(acpi_unregister_ioapic); 825 826 /** 827 * acpi_ioapic_registered - Check whether IOAPIC assoicatied with @gsi_base 828 * has been registered 829 * @handle: ACPI handle of the IOAPIC deivce 830 * @gsi_base: GSI base associated with the IOAPIC 831 * 832 * Assume caller holds some type of lock to serialize acpi_ioapic_registered() 833 * with acpi_register_ioapic()/acpi_unregister_ioapic(). 834 */ 835 int acpi_ioapic_registered(acpi_handle handle, u32 gsi_base) 836 { 837 int ret = 0; 838 839 #ifdef CONFIG_ACPI_HOTPLUG_IOAPIC 840 mutex_lock(&acpi_ioapic_lock); 841 ret = mp_ioapic_registered(gsi_base); 842 mutex_unlock(&acpi_ioapic_lock); 843 #endif 844 845 return ret; 846 } 847 848 static int __init acpi_parse_sbf(struct acpi_table_header *table) 849 { 850 struct acpi_table_boot *sb = (struct acpi_table_boot *)table; 851 852 sbf_port = sb->cmos_index; /* Save CMOS port */ 853 854 return 0; 855 } 856 857 #ifdef CONFIG_HPET_TIMER 858 #include <asm/hpet.h> 859 860 static struct resource *hpet_res __initdata; 861 862 static int __init acpi_parse_hpet(struct acpi_table_header *table) 863 { 864 struct acpi_table_hpet *hpet_tbl = (struct acpi_table_hpet *)table; 865 866 if (hpet_tbl->address.space_id != ACPI_SPACE_MEM) { 867 printk(KERN_WARNING PREFIX "HPET timers must be located in " 868 "memory.\n"); 869 return -1; 870 } 871 872 hpet_address = hpet_tbl->address.address; 873 hpet_blockid = hpet_tbl->sequence; 874 875 /* 876 * Some broken BIOSes advertise HPET at 0x0. We really do not 877 * want to allocate a resource there. 878 */ 879 if (!hpet_address) { 880 printk(KERN_WARNING PREFIX 881 "HPET id: %#x base: %#lx is invalid\n", 882 hpet_tbl->id, hpet_address); 883 return 0; 884 } 885 #ifdef CONFIG_X86_64 886 /* 887 * Some even more broken BIOSes advertise HPET at 888 * 0xfed0000000000000 instead of 0xfed00000. Fix it up and add 889 * some noise: 890 */ 891 if (hpet_address == 0xfed0000000000000UL) { 892 if (!hpet_force_user) { 893 printk(KERN_WARNING PREFIX "HPET id: %#x " 894 "base: 0xfed0000000000000 is bogus\n " 895 "try hpet=force on the kernel command line to " 896 "fix it up to 0xfed00000.\n", hpet_tbl->id); 897 hpet_address = 0; 898 return 0; 899 } 900 printk(KERN_WARNING PREFIX 901 "HPET id: %#x base: 0xfed0000000000000 fixed up " 902 "to 0xfed00000.\n", hpet_tbl->id); 903 hpet_address >>= 32; 904 } 905 #endif 906 printk(KERN_INFO PREFIX "HPET id: %#x base: %#lx\n", 907 hpet_tbl->id, hpet_address); 908 909 /* 910 * Allocate and initialize the HPET firmware resource for adding into 911 * the resource tree during the lateinit timeframe. 912 */ 913 #define HPET_RESOURCE_NAME_SIZE 9 914 hpet_res = alloc_bootmem(sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE); 915 916 hpet_res->name = (void *)&hpet_res[1]; 917 hpet_res->flags = IORESOURCE_MEM; 918 snprintf((char *)hpet_res->name, HPET_RESOURCE_NAME_SIZE, "HPET %u", 919 hpet_tbl->sequence); 920 921 hpet_res->start = hpet_address; 922 hpet_res->end = hpet_address + (1 * 1024) - 1; 923 924 return 0; 925 } 926 927 /* 928 * hpet_insert_resource inserts the HPET resources used into the resource 929 * tree. 930 */ 931 static __init int hpet_insert_resource(void) 932 { 933 if (!hpet_res) 934 return 1; 935 936 return insert_resource(&iomem_resource, hpet_res); 937 } 938 939 late_initcall(hpet_insert_resource); 940 941 #else 942 #define acpi_parse_hpet NULL 943 #endif 944 945 static int __init acpi_parse_fadt(struct acpi_table_header *table) 946 { 947 if (!(acpi_gbl_FADT.boot_flags & ACPI_FADT_LEGACY_DEVICES)) { 948 pr_debug("ACPI: no legacy devices present\n"); 949 x86_platform.legacy.devices.pnpbios = 0; 950 } 951 952 if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID && 953 !(acpi_gbl_FADT.boot_flags & ACPI_FADT_8042) && 954 x86_platform.legacy.i8042 != X86_LEGACY_I8042_PLATFORM_ABSENT) { 955 pr_debug("ACPI: i8042 controller is absent\n"); 956 x86_platform.legacy.i8042 = X86_LEGACY_I8042_FIRMWARE_ABSENT; 957 } 958 959 if (acpi_gbl_FADT.boot_flags & ACPI_FADT_NO_CMOS_RTC) { 960 pr_debug("ACPI: not registering RTC platform device\n"); 961 x86_platform.legacy.rtc = 0; 962 } 963 964 if (acpi_gbl_FADT.boot_flags & ACPI_FADT_NO_VGA) { 965 pr_debug("ACPI: probing for VGA not safe\n"); 966 x86_platform.legacy.no_vga = 1; 967 } 968 969 #ifdef CONFIG_X86_PM_TIMER 970 /* detect the location of the ACPI PM Timer */ 971 if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID) { 972 /* FADT rev. 2 */ 973 if (acpi_gbl_FADT.xpm_timer_block.space_id != 974 ACPI_ADR_SPACE_SYSTEM_IO) 975 return 0; 976 977 pmtmr_ioport = acpi_gbl_FADT.xpm_timer_block.address; 978 /* 979 * "X" fields are optional extensions to the original V1.0 980 * fields, so we must selectively expand V1.0 fields if the 981 * corresponding X field is zero. 982 */ 983 if (!pmtmr_ioport) 984 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block; 985 } else { 986 /* FADT rev. 1 */ 987 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block; 988 } 989 if (pmtmr_ioport) 990 printk(KERN_INFO PREFIX "PM-Timer IO Port: %#x\n", 991 pmtmr_ioport); 992 #endif 993 return 0; 994 } 995 996 #ifdef CONFIG_X86_LOCAL_APIC 997 /* 998 * Parse LAPIC entries in MADT 999 * returns 0 on success, < 0 on error 1000 */ 1001 1002 static int __init early_acpi_parse_madt_lapic_addr_ovr(void) 1003 { 1004 int count; 1005 1006 if (!boot_cpu_has(X86_FEATURE_APIC)) 1007 return -ENODEV; 1008 1009 /* 1010 * Note that the LAPIC address is obtained from the MADT (32-bit value) 1011 * and (optionally) overridden by a LAPIC_ADDR_OVR entry (64-bit value). 1012 */ 1013 1014 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE, 1015 acpi_parse_lapic_addr_ovr, 0); 1016 if (count < 0) { 1017 printk(KERN_ERR PREFIX 1018 "Error parsing LAPIC address override entry\n"); 1019 return count; 1020 } 1021 1022 register_lapic_address(acpi_lapic_addr); 1023 1024 return count; 1025 } 1026 1027 static int __init acpi_parse_madt_lapic_entries(void) 1028 { 1029 int count; 1030 int x2count = 0; 1031 int ret; 1032 struct acpi_subtable_proc madt_proc[2]; 1033 1034 if (!boot_cpu_has(X86_FEATURE_APIC)) 1035 return -ENODEV; 1036 1037 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC, 1038 acpi_parse_sapic, MAX_LOCAL_APIC); 1039 1040 if (!count) { 1041 memset(madt_proc, 0, sizeof(madt_proc)); 1042 madt_proc[0].id = ACPI_MADT_TYPE_LOCAL_APIC; 1043 madt_proc[0].handler = acpi_parse_lapic; 1044 madt_proc[1].id = ACPI_MADT_TYPE_LOCAL_X2APIC; 1045 madt_proc[1].handler = acpi_parse_x2apic; 1046 ret = acpi_table_parse_entries_array(ACPI_SIG_MADT, 1047 sizeof(struct acpi_table_madt), 1048 madt_proc, ARRAY_SIZE(madt_proc), MAX_LOCAL_APIC); 1049 if (ret < 0) { 1050 printk(KERN_ERR PREFIX 1051 "Error parsing LAPIC/X2APIC entries\n"); 1052 return ret; 1053 } 1054 1055 count = madt_proc[0].count; 1056 x2count = madt_proc[1].count; 1057 } 1058 if (!count && !x2count) { 1059 printk(KERN_ERR PREFIX "No LAPIC entries present\n"); 1060 /* TBD: Cleanup to allow fallback to MPS */ 1061 return -ENODEV; 1062 } else if (count < 0 || x2count < 0) { 1063 printk(KERN_ERR PREFIX "Error parsing LAPIC entry\n"); 1064 /* TBD: Cleanup to allow fallback to MPS */ 1065 return count; 1066 } 1067 1068 x2count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC_NMI, 1069 acpi_parse_x2apic_nmi, 0); 1070 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI, 1071 acpi_parse_lapic_nmi, 0); 1072 if (count < 0 || x2count < 0) { 1073 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n"); 1074 /* TBD: Cleanup to allow fallback to MPS */ 1075 return count; 1076 } 1077 return 0; 1078 } 1079 #endif /* CONFIG_X86_LOCAL_APIC */ 1080 1081 #ifdef CONFIG_X86_IO_APIC 1082 static void __init mp_config_acpi_legacy_irqs(void) 1083 { 1084 int i; 1085 struct mpc_intsrc mp_irq; 1086 1087 #ifdef CONFIG_EISA 1088 /* 1089 * Fabricate the legacy ISA bus (bus #31). 1090 */ 1091 mp_bus_id_to_type[MP_ISA_BUS] = MP_BUS_ISA; 1092 #endif 1093 set_bit(MP_ISA_BUS, mp_bus_not_pci); 1094 pr_debug("Bus #%d is ISA (nIRQs: %d)\n", MP_ISA_BUS, nr_legacy_irqs()); 1095 1096 /* 1097 * Use the default configuration for the IRQs 0-15. Unless 1098 * overridden by (MADT) interrupt source override entries. 1099 */ 1100 for (i = 0; i < nr_legacy_irqs(); i++) { 1101 int ioapic, pin; 1102 unsigned int dstapic; 1103 int idx; 1104 u32 gsi; 1105 1106 /* Locate the gsi that irq i maps to. */ 1107 if (acpi_isa_irq_to_gsi(i, &gsi)) 1108 continue; 1109 1110 /* 1111 * Locate the IOAPIC that manages the ISA IRQ. 1112 */ 1113 ioapic = mp_find_ioapic(gsi); 1114 if (ioapic < 0) 1115 continue; 1116 pin = mp_find_ioapic_pin(ioapic, gsi); 1117 dstapic = mpc_ioapic_id(ioapic); 1118 1119 for (idx = 0; idx < mp_irq_entries; idx++) { 1120 struct mpc_intsrc *irq = mp_irqs + idx; 1121 1122 /* Do we already have a mapping for this ISA IRQ? */ 1123 if (irq->srcbus == MP_ISA_BUS && irq->srcbusirq == i) 1124 break; 1125 1126 /* Do we already have a mapping for this IOAPIC pin */ 1127 if (irq->dstapic == dstapic && irq->dstirq == pin) 1128 break; 1129 } 1130 1131 if (idx != mp_irq_entries) { 1132 printk(KERN_DEBUG "ACPI: IRQ%d used by override.\n", i); 1133 continue; /* IRQ already used */ 1134 } 1135 1136 mp_irq.type = MP_INTSRC; 1137 mp_irq.irqflag = 0; /* Conforming */ 1138 mp_irq.srcbus = MP_ISA_BUS; 1139 mp_irq.dstapic = dstapic; 1140 mp_irq.irqtype = mp_INT; 1141 mp_irq.srcbusirq = i; /* Identity mapped */ 1142 mp_irq.dstirq = pin; 1143 1144 mp_save_irq(&mp_irq); 1145 } 1146 } 1147 1148 /* 1149 * Parse IOAPIC related entries in MADT 1150 * returns 0 on success, < 0 on error 1151 */ 1152 static int __init acpi_parse_madt_ioapic_entries(void) 1153 { 1154 int count; 1155 1156 /* 1157 * ACPI interpreter is required to complete interrupt setup, 1158 * so if it is off, don't enumerate the io-apics with ACPI. 1159 * If MPS is present, it will handle them, 1160 * otherwise the system will stay in PIC mode 1161 */ 1162 if (acpi_disabled || acpi_noirq) 1163 return -ENODEV; 1164 1165 if (!boot_cpu_has(X86_FEATURE_APIC)) 1166 return -ENODEV; 1167 1168 /* 1169 * if "noapic" boot option, don't look for IO-APICs 1170 */ 1171 if (skip_ioapic_setup) { 1172 printk(KERN_INFO PREFIX "Skipping IOAPIC probe " 1173 "due to 'noapic' option.\n"); 1174 return -ENODEV; 1175 } 1176 1177 count = acpi_table_parse_madt(ACPI_MADT_TYPE_IO_APIC, acpi_parse_ioapic, 1178 MAX_IO_APICS); 1179 if (!count) { 1180 printk(KERN_ERR PREFIX "No IOAPIC entries present\n"); 1181 return -ENODEV; 1182 } else if (count < 0) { 1183 printk(KERN_ERR PREFIX "Error parsing IOAPIC entry\n"); 1184 return count; 1185 } 1186 1187 count = acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE, 1188 acpi_parse_int_src_ovr, nr_irqs); 1189 if (count < 0) { 1190 printk(KERN_ERR PREFIX 1191 "Error parsing interrupt source overrides entry\n"); 1192 /* TBD: Cleanup to allow fallback to MPS */ 1193 return count; 1194 } 1195 1196 /* 1197 * If BIOS did not supply an INT_SRC_OVR for the SCI 1198 * pretend we got one so we can set the SCI flags. 1199 */ 1200 if (!acpi_sci_override_gsi) 1201 acpi_sci_ioapic_setup(acpi_gbl_FADT.sci_interrupt, 0, 0, 1202 acpi_gbl_FADT.sci_interrupt); 1203 1204 /* Fill in identity legacy mappings where no override */ 1205 mp_config_acpi_legacy_irqs(); 1206 1207 count = acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE, 1208 acpi_parse_nmi_src, nr_irqs); 1209 if (count < 0) { 1210 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n"); 1211 /* TBD: Cleanup to allow fallback to MPS */ 1212 return count; 1213 } 1214 1215 return 0; 1216 } 1217 #else 1218 static inline int acpi_parse_madt_ioapic_entries(void) 1219 { 1220 return -1; 1221 } 1222 #endif /* !CONFIG_X86_IO_APIC */ 1223 1224 static void __init early_acpi_process_madt(void) 1225 { 1226 #ifdef CONFIG_X86_LOCAL_APIC 1227 int error; 1228 1229 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) { 1230 1231 /* 1232 * Parse MADT LAPIC entries 1233 */ 1234 error = early_acpi_parse_madt_lapic_addr_ovr(); 1235 if (!error) { 1236 acpi_lapic = 1; 1237 smp_found_config = 1; 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 } 1248 #endif 1249 } 1250 1251 static void __init acpi_process_madt(void) 1252 { 1253 #ifdef CONFIG_X86_LOCAL_APIC 1254 int error; 1255 1256 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) { 1257 1258 /* 1259 * Parse MADT LAPIC entries 1260 */ 1261 error = acpi_parse_madt_lapic_entries(); 1262 if (!error) { 1263 acpi_lapic = 1; 1264 1265 /* 1266 * Parse MADT IO-APIC entries 1267 */ 1268 mutex_lock(&acpi_ioapic_lock); 1269 error = acpi_parse_madt_ioapic_entries(); 1270 mutex_unlock(&acpi_ioapic_lock); 1271 if (!error) { 1272 acpi_set_irq_model_ioapic(); 1273 1274 smp_found_config = 1; 1275 } 1276 } 1277 if (error == -EINVAL) { 1278 /* 1279 * Dell Precision Workstation 410, 610 come here. 1280 */ 1281 printk(KERN_ERR PREFIX 1282 "Invalid BIOS MADT, disabling ACPI\n"); 1283 disable_acpi(); 1284 } 1285 } else { 1286 /* 1287 * ACPI found no MADT, and so ACPI wants UP PIC mode. 1288 * In the event an MPS table was found, forget it. 1289 * Boot with "acpi=off" to use MPS on such a system. 1290 */ 1291 if (smp_found_config) { 1292 printk(KERN_WARNING PREFIX 1293 "No APIC-table, disabling MPS\n"); 1294 smp_found_config = 0; 1295 } 1296 } 1297 1298 /* 1299 * ACPI supports both logical (e.g. Hyper-Threading) and physical 1300 * processors, where MPS only supports physical. 1301 */ 1302 if (acpi_lapic && acpi_ioapic) 1303 printk(KERN_INFO "Using ACPI (MADT) for SMP configuration " 1304 "information\n"); 1305 else if (acpi_lapic) 1306 printk(KERN_INFO "Using ACPI for processor (LAPIC) " 1307 "configuration information\n"); 1308 #endif 1309 return; 1310 } 1311 1312 static int __init disable_acpi_irq(const struct dmi_system_id *d) 1313 { 1314 if (!acpi_force) { 1315 printk(KERN_NOTICE "%s detected: force use of acpi=noirq\n", 1316 d->ident); 1317 acpi_noirq_set(); 1318 } 1319 return 0; 1320 } 1321 1322 static int __init disable_acpi_pci(const struct dmi_system_id *d) 1323 { 1324 if (!acpi_force) { 1325 printk(KERN_NOTICE "%s detected: force use of pci=noacpi\n", 1326 d->ident); 1327 acpi_disable_pci(); 1328 } 1329 return 0; 1330 } 1331 1332 static int __init dmi_disable_acpi(const struct dmi_system_id *d) 1333 { 1334 if (!acpi_force) { 1335 printk(KERN_NOTICE "%s detected: acpi off\n", d->ident); 1336 disable_acpi(); 1337 } else { 1338 printk(KERN_NOTICE 1339 "Warning: DMI blacklist says broken, but acpi forced\n"); 1340 } 1341 return 0; 1342 } 1343 1344 /* 1345 * Force ignoring BIOS IRQ0 override 1346 */ 1347 static int __init dmi_ignore_irq0_timer_override(const struct dmi_system_id *d) 1348 { 1349 if (!acpi_skip_timer_override) { 1350 pr_notice("%s detected: Ignoring BIOS IRQ0 override\n", 1351 d->ident); 1352 acpi_skip_timer_override = 1; 1353 } 1354 return 0; 1355 } 1356 1357 /* 1358 * ACPI offers an alternative platform interface model that removes 1359 * ACPI hardware requirements for platforms that do not implement 1360 * the PC Architecture. 1361 * 1362 * We initialize the Hardware-reduced ACPI model here: 1363 */ 1364 static void __init acpi_reduced_hw_init(void) 1365 { 1366 if (acpi_gbl_reduced_hardware) { 1367 /* 1368 * Override x86_init functions and bypass legacy pic 1369 * in Hardware-reduced ACPI mode 1370 */ 1371 x86_init.timers.timer_init = x86_init_noop; 1372 x86_init.irqs.pre_vector_init = x86_init_noop; 1373 legacy_pic = &null_legacy_pic; 1374 } 1375 } 1376 1377 /* 1378 * If your system is blacklisted here, but you find that acpi=force 1379 * works for you, please contact linux-acpi@vger.kernel.org 1380 */ 1381 static const struct dmi_system_id acpi_dmi_table[] __initconst = { 1382 /* 1383 * Boxes that need ACPI disabled 1384 */ 1385 { 1386 .callback = dmi_disable_acpi, 1387 .ident = "IBM Thinkpad", 1388 .matches = { 1389 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), 1390 DMI_MATCH(DMI_BOARD_NAME, "2629H1G"), 1391 }, 1392 }, 1393 1394 /* 1395 * Boxes that need ACPI PCI IRQ routing disabled 1396 */ 1397 { 1398 .callback = disable_acpi_irq, 1399 .ident = "ASUS A7V", 1400 .matches = { 1401 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC"), 1402 DMI_MATCH(DMI_BOARD_NAME, "<A7V>"), 1403 /* newer BIOS, Revision 1011, does work */ 1404 DMI_MATCH(DMI_BIOS_VERSION, 1405 "ASUS A7V ACPI BIOS Revision 1007"), 1406 }, 1407 }, 1408 { 1409 /* 1410 * Latest BIOS for IBM 600E (1.16) has bad pcinum 1411 * for LPC bridge, which is needed for the PCI 1412 * interrupt links to work. DSDT fix is in bug 5966. 1413 * 2645, 2646 model numbers are shared with 600/600E/600X 1414 */ 1415 .callback = disable_acpi_irq, 1416 .ident = "IBM Thinkpad 600 Series 2645", 1417 .matches = { 1418 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), 1419 DMI_MATCH(DMI_BOARD_NAME, "2645"), 1420 }, 1421 }, 1422 { 1423 .callback = disable_acpi_irq, 1424 .ident = "IBM Thinkpad 600 Series 2646", 1425 .matches = { 1426 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), 1427 DMI_MATCH(DMI_BOARD_NAME, "2646"), 1428 }, 1429 }, 1430 /* 1431 * Boxes that need ACPI PCI IRQ routing and PCI scan disabled 1432 */ 1433 { /* _BBN 0 bug */ 1434 .callback = disable_acpi_pci, 1435 .ident = "ASUS PR-DLS", 1436 .matches = { 1437 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."), 1438 DMI_MATCH(DMI_BOARD_NAME, "PR-DLS"), 1439 DMI_MATCH(DMI_BIOS_VERSION, 1440 "ASUS PR-DLS ACPI BIOS Revision 1010"), 1441 DMI_MATCH(DMI_BIOS_DATE, "03/21/2003") 1442 }, 1443 }, 1444 { 1445 .callback = disable_acpi_pci, 1446 .ident = "Acer TravelMate 36x Laptop", 1447 .matches = { 1448 DMI_MATCH(DMI_SYS_VENDOR, "Acer"), 1449 DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"), 1450 }, 1451 }, 1452 {} 1453 }; 1454 1455 /* second table for DMI checks that should run after early-quirks */ 1456 static const struct dmi_system_id acpi_dmi_table_late[] __initconst = { 1457 /* 1458 * HP laptops which use a DSDT reporting as HP/SB400/10000, 1459 * which includes some code which overrides all temperature 1460 * trip points to 16C if the INTIN2 input of the I/O APIC 1461 * is enabled. This input is incorrectly designated the 1462 * ISA IRQ 0 via an interrupt source override even though 1463 * it is wired to the output of the master 8259A and INTIN0 1464 * is not connected at all. Force ignoring BIOS IRQ0 1465 * override in that cases. 1466 */ 1467 { 1468 .callback = dmi_ignore_irq0_timer_override, 1469 .ident = "HP nx6115 laptop", 1470 .matches = { 1471 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 1472 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6115"), 1473 }, 1474 }, 1475 { 1476 .callback = dmi_ignore_irq0_timer_override, 1477 .ident = "HP NX6125 laptop", 1478 .matches = { 1479 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 1480 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6125"), 1481 }, 1482 }, 1483 { 1484 .callback = dmi_ignore_irq0_timer_override, 1485 .ident = "HP NX6325 laptop", 1486 .matches = { 1487 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 1488 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6325"), 1489 }, 1490 }, 1491 { 1492 .callback = dmi_ignore_irq0_timer_override, 1493 .ident = "HP 6715b laptop", 1494 .matches = { 1495 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 1496 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq 6715b"), 1497 }, 1498 }, 1499 { 1500 .callback = dmi_ignore_irq0_timer_override, 1501 .ident = "FUJITSU SIEMENS", 1502 .matches = { 1503 DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"), 1504 DMI_MATCH(DMI_PRODUCT_NAME, "AMILO PRO V2030"), 1505 }, 1506 }, 1507 {} 1508 }; 1509 1510 /* 1511 * acpi_boot_table_init() and acpi_boot_init() 1512 * called from setup_arch(), always. 1513 * 1. checksums all tables 1514 * 2. enumerates lapics 1515 * 3. enumerates io-apics 1516 * 1517 * acpi_table_init() is separate to allow reading SRAT without 1518 * other side effects. 1519 * 1520 * side effects of acpi_boot_init: 1521 * acpi_lapic = 1 if LAPIC found 1522 * acpi_ioapic = 1 if IOAPIC found 1523 * if (acpi_lapic && acpi_ioapic) smp_found_config = 1; 1524 * if acpi_blacklisted() acpi_disabled = 1; 1525 * acpi_irq_model=... 1526 * ... 1527 */ 1528 1529 void __init acpi_boot_table_init(void) 1530 { 1531 dmi_check_system(acpi_dmi_table); 1532 1533 /* 1534 * If acpi_disabled, bail out 1535 */ 1536 if (acpi_disabled) 1537 return; 1538 1539 /* 1540 * Initialize the ACPI boot-time table parser. 1541 */ 1542 if (acpi_table_init()) { 1543 disable_acpi(); 1544 return; 1545 } 1546 1547 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf); 1548 1549 /* 1550 * blacklist may disable ACPI entirely 1551 */ 1552 if (acpi_blacklisted()) { 1553 if (acpi_force) { 1554 printk(KERN_WARNING PREFIX "acpi=force override\n"); 1555 } else { 1556 printk(KERN_WARNING PREFIX "Disabling ACPI support\n"); 1557 disable_acpi(); 1558 return; 1559 } 1560 } 1561 } 1562 1563 int __init early_acpi_boot_init(void) 1564 { 1565 /* 1566 * If acpi_disabled, bail out 1567 */ 1568 if (acpi_disabled) 1569 return 1; 1570 1571 /* 1572 * Process the Multiple APIC Description Table (MADT), if present 1573 */ 1574 early_acpi_process_madt(); 1575 1576 /* 1577 * Hardware-reduced ACPI mode initialization: 1578 */ 1579 acpi_reduced_hw_init(); 1580 1581 return 0; 1582 } 1583 1584 int __init acpi_boot_init(void) 1585 { 1586 /* those are executed after early-quirks are executed */ 1587 dmi_check_system(acpi_dmi_table_late); 1588 1589 /* 1590 * If acpi_disabled, bail out 1591 */ 1592 if (acpi_disabled) 1593 return 1; 1594 1595 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf); 1596 1597 /* 1598 * set sci_int and PM timer address 1599 */ 1600 acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt); 1601 1602 /* 1603 * Process the Multiple APIC Description Table (MADT), if present 1604 */ 1605 acpi_process_madt(); 1606 1607 acpi_table_parse(ACPI_SIG_HPET, acpi_parse_hpet); 1608 if (IS_ENABLED(CONFIG_ACPI_BGRT)) 1609 acpi_table_parse(ACPI_SIG_BGRT, acpi_parse_bgrt); 1610 1611 if (!acpi_noirq) 1612 x86_init.pci.init = pci_acpi_init; 1613 1614 return 0; 1615 } 1616 1617 static int __init parse_acpi(char *arg) 1618 { 1619 if (!arg) 1620 return -EINVAL; 1621 1622 /* "acpi=off" disables both ACPI table parsing and interpreter */ 1623 if (strcmp(arg, "off") == 0) { 1624 disable_acpi(); 1625 } 1626 /* acpi=force to over-ride black-list */ 1627 else if (strcmp(arg, "force") == 0) { 1628 acpi_force = 1; 1629 acpi_disabled = 0; 1630 } 1631 /* acpi=strict disables out-of-spec workarounds */ 1632 else if (strcmp(arg, "strict") == 0) { 1633 acpi_strict = 1; 1634 } 1635 /* acpi=rsdt use RSDT instead of XSDT */ 1636 else if (strcmp(arg, "rsdt") == 0) { 1637 acpi_gbl_do_not_use_xsdt = TRUE; 1638 } 1639 /* "acpi=noirq" disables ACPI interrupt routing */ 1640 else if (strcmp(arg, "noirq") == 0) { 1641 acpi_noirq_set(); 1642 } 1643 /* "acpi=copy_dsdt" copys DSDT */ 1644 else if (strcmp(arg, "copy_dsdt") == 0) { 1645 acpi_gbl_copy_dsdt_locally = 1; 1646 } 1647 /* "acpi=nocmcff" disables FF mode for corrected errors */ 1648 else if (strcmp(arg, "nocmcff") == 0) { 1649 acpi_disable_cmcff = 1; 1650 } else { 1651 /* Core will printk when we return error. */ 1652 return -EINVAL; 1653 } 1654 return 0; 1655 } 1656 early_param("acpi", parse_acpi); 1657 1658 /* FIXME: Using pci= for an ACPI parameter is a travesty. */ 1659 static int __init parse_pci(char *arg) 1660 { 1661 if (arg && strcmp(arg, "noacpi") == 0) 1662 acpi_disable_pci(); 1663 return 0; 1664 } 1665 early_param("pci", parse_pci); 1666 1667 int __init acpi_mps_check(void) 1668 { 1669 #if defined(CONFIG_X86_LOCAL_APIC) && !defined(CONFIG_X86_MPPARSE) 1670 /* mptable code is not built-in*/ 1671 if (acpi_disabled || acpi_noirq) { 1672 printk(KERN_WARNING "MPS support code is not built-in.\n" 1673 "Using acpi=off or acpi=noirq or pci=noacpi " 1674 "may have problem\n"); 1675 return 1; 1676 } 1677 #endif 1678 return 0; 1679 } 1680 1681 #ifdef CONFIG_X86_IO_APIC 1682 static int __init parse_acpi_skip_timer_override(char *arg) 1683 { 1684 acpi_skip_timer_override = 1; 1685 return 0; 1686 } 1687 early_param("acpi_skip_timer_override", parse_acpi_skip_timer_override); 1688 1689 static int __init parse_acpi_use_timer_override(char *arg) 1690 { 1691 acpi_use_timer_override = 1; 1692 return 0; 1693 } 1694 early_param("acpi_use_timer_override", parse_acpi_use_timer_override); 1695 #endif /* CONFIG_X86_IO_APIC */ 1696 1697 static int __init setup_acpi_sci(char *s) 1698 { 1699 if (!s) 1700 return -EINVAL; 1701 if (!strcmp(s, "edge")) 1702 acpi_sci_flags = ACPI_MADT_TRIGGER_EDGE | 1703 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK); 1704 else if (!strcmp(s, "level")) 1705 acpi_sci_flags = ACPI_MADT_TRIGGER_LEVEL | 1706 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK); 1707 else if (!strcmp(s, "high")) 1708 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_HIGH | 1709 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK); 1710 else if (!strcmp(s, "low")) 1711 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_LOW | 1712 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK); 1713 else 1714 return -EINVAL; 1715 return 0; 1716 } 1717 early_param("acpi_sci", setup_acpi_sci); 1718 1719 int __acpi_acquire_global_lock(unsigned int *lock) 1720 { 1721 unsigned int old, new, val; 1722 do { 1723 old = *lock; 1724 new = (((old & ~0x3) + 2) + ((old >> 1) & 0x1)); 1725 val = cmpxchg(lock, old, new); 1726 } while (unlikely (val != old)); 1727 return (new < 3) ? -1 : 0; 1728 } 1729 1730 int __acpi_release_global_lock(unsigned int *lock) 1731 { 1732 unsigned int old, new, val; 1733 do { 1734 old = *lock; 1735 new = old & ~0x3; 1736 val = cmpxchg(lock, old, new); 1737 } while (unlikely (val != old)); 1738 return old & 0x1; 1739 } 1740 1741 void __init arch_reserve_mem_area(acpi_physical_address addr, size_t size) 1742 { 1743 e820__range_add(addr, size, E820_TYPE_ACPI); 1744 e820__update_table_print(); 1745 } 1746