1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * boot.c - Architecture-Specific Low-Level ACPI Boot Support 4 * 5 * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com> 6 * Copyright (C) 2001 Jun Nakajima <jun.nakajima@intel.com> 7 */ 8 9 #include <linux/init.h> 10 #include <linux/acpi.h> 11 #include <linux/acpi_pmtmr.h> 12 #include <linux/efi.h> 13 #include <linux/cpumask.h> 14 #include <linux/export.h> 15 #include <linux/dmi.h> 16 #include <linux/irq.h> 17 #include <linux/slab.h> 18 #include <linux/memblock.h> 19 #include <linux/ioport.h> 20 #include <linux/pci.h> 21 #include <linux/efi-bgrt.h> 22 #include <linux/serial_core.h> 23 24 #include <asm/e820/api.h> 25 #include <asm/irqdomain.h> 26 #include <asm/pci_x86.h> 27 #include <asm/pgtable.h> 28 #include <asm/io_apic.h> 29 #include <asm/apic.h> 30 #include <asm/io.h> 31 #include <asm/mpspec.h> 32 #include <asm/smp.h> 33 #include <asm/i8259.h> 34 #include <asm/setup.h> 35 36 #include "sleep.h" /* To include x86_acpi_suspend_lowlevel */ 37 static int __initdata acpi_force = 0; 38 int acpi_disabled; 39 EXPORT_SYMBOL(acpi_disabled); 40 41 #ifdef CONFIG_X86_64 42 # include <asm/proto.h> 43 #endif /* X86 */ 44 45 #define PREFIX "ACPI: " 46 47 int acpi_noirq; /* skip ACPI IRQ initialization */ 48 static int acpi_nobgrt; /* skip ACPI BGRT */ 49 int acpi_pci_disabled; /* skip ACPI PCI scan and IRQ initialization */ 50 EXPORT_SYMBOL(acpi_pci_disabled); 51 52 int acpi_lapic; 53 int acpi_ioapic; 54 int acpi_strict; 55 int acpi_disable_cmcff; 56 57 /* ACPI SCI override configuration */ 58 u8 acpi_sci_flags __initdata; 59 u32 acpi_sci_override_gsi __initdata = INVALID_ACPI_IRQ; 60 int acpi_skip_timer_override __initdata; 61 int acpi_use_timer_override __initdata; 62 int acpi_fix_pin2_polarity __initdata; 63 64 #ifdef CONFIG_X86_LOCAL_APIC 65 static u64 acpi_lapic_addr __initdata = APIC_DEFAULT_PHYS_BASE; 66 #endif 67 68 #ifdef CONFIG_X86_IO_APIC 69 /* 70 * Locks related to IOAPIC hotplug 71 * Hotplug side: 72 * ->device_hotplug_lock 73 * ->acpi_ioapic_lock 74 * ->ioapic_lock 75 * Interrupt mapping side: 76 * ->acpi_ioapic_lock 77 * ->ioapic_mutex 78 * ->ioapic_lock 79 */ 80 static DEFINE_MUTEX(acpi_ioapic_lock); 81 #endif 82 83 /* -------------------------------------------------------------------------- 84 Boot-time Configuration 85 -------------------------------------------------------------------------- */ 86 87 /* 88 * The default interrupt routing model is PIC (8259). This gets 89 * overridden if IOAPICs are enumerated (below). 90 */ 91 enum acpi_irq_model_id acpi_irq_model = ACPI_IRQ_MODEL_PIC; 92 93 94 /* 95 * ISA irqs by default are the first 16 gsis but can be 96 * any gsi as specified by an interrupt source override. 97 */ 98 static u32 isa_irq_to_gsi[NR_IRQS_LEGACY] __read_mostly = { 99 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 100 }; 101 102 /* 103 * This is just a simple wrapper around early_memremap(), 104 * with sanity checks for phys == 0 and size == 0. 105 */ 106 void __init __iomem *__acpi_map_table(unsigned long phys, unsigned long size) 107 { 108 109 if (!phys || !size) 110 return NULL; 111 112 return early_memremap(phys, size); 113 } 114 115 void __init __acpi_unmap_table(void __iomem *map, unsigned long size) 116 { 117 if (!map || !size) 118 return; 119 120 early_memunmap(map, size); 121 } 122 123 #ifdef CONFIG_X86_LOCAL_APIC 124 static int __init acpi_parse_madt(struct acpi_table_header *table) 125 { 126 struct acpi_table_madt *madt = NULL; 127 128 if (!boot_cpu_has(X86_FEATURE_APIC)) 129 return -EINVAL; 130 131 madt = (struct acpi_table_madt *)table; 132 if (!madt) { 133 printk(KERN_WARNING PREFIX "Unable to map MADT\n"); 134 return -ENODEV; 135 } 136 137 if (madt->address) { 138 acpi_lapic_addr = (u64) madt->address; 139 140 printk(KERN_DEBUG PREFIX "Local APIC address 0x%08x\n", 141 madt->address); 142 } 143 144 default_acpi_madt_oem_check(madt->header.oem_id, 145 madt->header.oem_table_id); 146 147 return 0; 148 } 149 150 /** 151 * acpi_register_lapic - register a local apic and generates a logic cpu number 152 * @id: local apic id to register 153 * @acpiid: ACPI id to register 154 * @enabled: this cpu is enabled or not 155 * 156 * Returns the logic cpu number which maps to the local apic 157 */ 158 static int acpi_register_lapic(int id, u32 acpiid, u8 enabled) 159 { 160 unsigned int ver = 0; 161 int cpu; 162 163 if (id >= MAX_LOCAL_APIC) { 164 printk(KERN_INFO PREFIX "skipped apicid that is too big\n"); 165 return -EINVAL; 166 } 167 168 if (!enabled) { 169 ++disabled_cpus; 170 return -EINVAL; 171 } 172 173 if (boot_cpu_physical_apicid != -1U) 174 ver = boot_cpu_apic_version; 175 176 cpu = generic_processor_info(id, ver); 177 if (cpu >= 0) 178 early_per_cpu(x86_cpu_to_acpiid, cpu) = acpiid; 179 180 return cpu; 181 } 182 183 static int __init 184 acpi_parse_x2apic(union acpi_subtable_headers *header, const unsigned long end) 185 { 186 struct acpi_madt_local_x2apic *processor = NULL; 187 #ifdef CONFIG_X86_X2APIC 188 u32 apic_id; 189 u8 enabled; 190 #endif 191 192 processor = (struct acpi_madt_local_x2apic *)header; 193 194 if (BAD_MADT_ENTRY(processor, end)) 195 return -EINVAL; 196 197 acpi_table_print_madt_entry(&header->common); 198 199 #ifdef CONFIG_X86_X2APIC 200 apic_id = processor->local_apic_id; 201 enabled = processor->lapic_flags & ACPI_MADT_ENABLED; 202 203 /* Ignore invalid ID */ 204 if (apic_id == 0xffffffff) 205 return 0; 206 207 /* 208 * We need to register disabled CPU as well to permit 209 * counting disabled CPUs. This allows us to size 210 * cpus_possible_map more accurately, to permit 211 * to not preallocating memory for all NR_CPUS 212 * when we use CPU hotplug. 213 */ 214 if (!apic->apic_id_valid(apic_id)) { 215 if (enabled) 216 pr_warn(PREFIX "x2apic entry ignored\n"); 217 return 0; 218 } 219 220 acpi_register_lapic(apic_id, processor->uid, enabled); 221 #else 222 printk(KERN_WARNING PREFIX "x2apic entry ignored\n"); 223 #endif 224 225 return 0; 226 } 227 228 static int __init 229 acpi_parse_lapic(union acpi_subtable_headers * header, const unsigned long end) 230 { 231 struct acpi_madt_local_apic *processor = NULL; 232 233 processor = (struct acpi_madt_local_apic *)header; 234 235 if (BAD_MADT_ENTRY(processor, end)) 236 return -EINVAL; 237 238 acpi_table_print_madt_entry(&header->common); 239 240 /* Ignore invalid ID */ 241 if (processor->id == 0xff) 242 return 0; 243 244 /* 245 * We need to register disabled CPU as well to permit 246 * counting disabled CPUs. This allows us to size 247 * cpus_possible_map more accurately, to permit 248 * to not preallocating memory for all NR_CPUS 249 * when we use CPU hotplug. 250 */ 251 acpi_register_lapic(processor->id, /* APIC ID */ 252 processor->processor_id, /* ACPI ID */ 253 processor->lapic_flags & ACPI_MADT_ENABLED); 254 255 return 0; 256 } 257 258 static int __init 259 acpi_parse_sapic(union acpi_subtable_headers *header, const unsigned long end) 260 { 261 struct acpi_madt_local_sapic *processor = NULL; 262 263 processor = (struct acpi_madt_local_sapic *)header; 264 265 if (BAD_MADT_ENTRY(processor, end)) 266 return -EINVAL; 267 268 acpi_table_print_madt_entry(&header->common); 269 270 acpi_register_lapic((processor->id << 8) | processor->eid,/* APIC ID */ 271 processor->processor_id, /* ACPI ID */ 272 processor->lapic_flags & ACPI_MADT_ENABLED); 273 274 return 0; 275 } 276 277 static int __init 278 acpi_parse_lapic_addr_ovr(union acpi_subtable_headers * header, 279 const unsigned long end) 280 { 281 struct acpi_madt_local_apic_override *lapic_addr_ovr = NULL; 282 283 lapic_addr_ovr = (struct acpi_madt_local_apic_override *)header; 284 285 if (BAD_MADT_ENTRY(lapic_addr_ovr, end)) 286 return -EINVAL; 287 288 acpi_table_print_madt_entry(&header->common); 289 290 acpi_lapic_addr = lapic_addr_ovr->address; 291 292 return 0; 293 } 294 295 static int __init 296 acpi_parse_x2apic_nmi(union acpi_subtable_headers *header, 297 const unsigned long end) 298 { 299 struct acpi_madt_local_x2apic_nmi *x2apic_nmi = NULL; 300 301 x2apic_nmi = (struct acpi_madt_local_x2apic_nmi *)header; 302 303 if (BAD_MADT_ENTRY(x2apic_nmi, end)) 304 return -EINVAL; 305 306 acpi_table_print_madt_entry(&header->common); 307 308 if (x2apic_nmi->lint != 1) 309 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n"); 310 311 return 0; 312 } 313 314 static int __init 315 acpi_parse_lapic_nmi(union acpi_subtable_headers * header, const unsigned long end) 316 { 317 struct acpi_madt_local_apic_nmi *lapic_nmi = NULL; 318 319 lapic_nmi = (struct acpi_madt_local_apic_nmi *)header; 320 321 if (BAD_MADT_ENTRY(lapic_nmi, end)) 322 return -EINVAL; 323 324 acpi_table_print_madt_entry(&header->common); 325 326 if (lapic_nmi->lint != 1) 327 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n"); 328 329 return 0; 330 } 331 332 #endif /*CONFIG_X86_LOCAL_APIC */ 333 334 #ifdef CONFIG_X86_IO_APIC 335 #define MP_ISA_BUS 0 336 337 static int __init mp_register_ioapic_irq(u8 bus_irq, u8 polarity, 338 u8 trigger, u32 gsi); 339 340 static void __init mp_override_legacy_irq(u8 bus_irq, u8 polarity, u8 trigger, 341 u32 gsi) 342 { 343 /* 344 * Check bus_irq boundary. 345 */ 346 if (bus_irq >= NR_IRQS_LEGACY) { 347 pr_warn("Invalid bus_irq %u for legacy override\n", bus_irq); 348 return; 349 } 350 351 /* 352 * TBD: This check is for faulty timer entries, where the override 353 * erroneously sets the trigger to level, resulting in a HUGE 354 * increase of timer interrupts! 355 */ 356 if ((bus_irq == 0) && (trigger == 3)) 357 trigger = 1; 358 359 if (mp_register_ioapic_irq(bus_irq, polarity, trigger, gsi) < 0) 360 return; 361 /* 362 * Reset default identity mapping if gsi is also an legacy IRQ, 363 * otherwise there will be more than one entry with the same GSI 364 * and acpi_isa_irq_to_gsi() may give wrong result. 365 */ 366 if (gsi < nr_legacy_irqs() && isa_irq_to_gsi[gsi] == gsi) 367 isa_irq_to_gsi[gsi] = INVALID_ACPI_IRQ; 368 isa_irq_to_gsi[bus_irq] = gsi; 369 } 370 371 static int mp_config_acpi_gsi(struct device *dev, u32 gsi, int trigger, 372 int polarity) 373 { 374 #ifdef CONFIG_X86_MPPARSE 375 struct mpc_intsrc mp_irq; 376 struct pci_dev *pdev; 377 unsigned char number; 378 unsigned int devfn; 379 int ioapic; 380 u8 pin; 381 382 if (!acpi_ioapic) 383 return 0; 384 if (!dev || !dev_is_pci(dev)) 385 return 0; 386 387 pdev = to_pci_dev(dev); 388 number = pdev->bus->number; 389 devfn = pdev->devfn; 390 pin = pdev->pin; 391 /* print the entry should happen on mptable identically */ 392 mp_irq.type = MP_INTSRC; 393 mp_irq.irqtype = mp_INT; 394 mp_irq.irqflag = (trigger == ACPI_EDGE_SENSITIVE ? 4 : 0x0c) | 395 (polarity == ACPI_ACTIVE_HIGH ? 1 : 3); 396 mp_irq.srcbus = number; 397 mp_irq.srcbusirq = (((devfn >> 3) & 0x1f) << 2) | ((pin - 1) & 3); 398 ioapic = mp_find_ioapic(gsi); 399 mp_irq.dstapic = mpc_ioapic_id(ioapic); 400 mp_irq.dstirq = mp_find_ioapic_pin(ioapic, gsi); 401 402 mp_save_irq(&mp_irq); 403 #endif 404 return 0; 405 } 406 407 static int __init mp_register_ioapic_irq(u8 bus_irq, u8 polarity, 408 u8 trigger, u32 gsi) 409 { 410 struct mpc_intsrc mp_irq; 411 int ioapic, pin; 412 413 /* Convert 'gsi' to 'ioapic.pin'(INTIN#) */ 414 ioapic = mp_find_ioapic(gsi); 415 if (ioapic < 0) { 416 pr_warn("Failed to find ioapic for gsi : %u\n", gsi); 417 return ioapic; 418 } 419 420 pin = mp_find_ioapic_pin(ioapic, gsi); 421 422 mp_irq.type = MP_INTSRC; 423 mp_irq.irqtype = mp_INT; 424 mp_irq.irqflag = (trigger << 2) | polarity; 425 mp_irq.srcbus = MP_ISA_BUS; 426 mp_irq.srcbusirq = bus_irq; 427 mp_irq.dstapic = mpc_ioapic_id(ioapic); 428 mp_irq.dstirq = pin; 429 430 mp_save_irq(&mp_irq); 431 432 return 0; 433 } 434 435 static int __init 436 acpi_parse_ioapic(union acpi_subtable_headers * header, const unsigned long end) 437 { 438 struct acpi_madt_io_apic *ioapic = NULL; 439 struct ioapic_domain_cfg cfg = { 440 .type = IOAPIC_DOMAIN_DYNAMIC, 441 .ops = &mp_ioapic_irqdomain_ops, 442 }; 443 444 ioapic = (struct acpi_madt_io_apic *)header; 445 446 if (BAD_MADT_ENTRY(ioapic, end)) 447 return -EINVAL; 448 449 acpi_table_print_madt_entry(&header->common); 450 451 /* Statically assign IRQ numbers for IOAPICs hosting legacy IRQs */ 452 if (ioapic->global_irq_base < nr_legacy_irqs()) 453 cfg.type = IOAPIC_DOMAIN_LEGACY; 454 455 mp_register_ioapic(ioapic->id, ioapic->address, ioapic->global_irq_base, 456 &cfg); 457 458 return 0; 459 } 460 461 /* 462 * Parse Interrupt Source Override for the ACPI SCI 463 */ 464 static void __init acpi_sci_ioapic_setup(u8 bus_irq, u16 polarity, u16 trigger, u32 gsi) 465 { 466 if (trigger == 0) /* compatible SCI trigger is level */ 467 trigger = 3; 468 469 if (polarity == 0) /* compatible SCI polarity is low */ 470 polarity = 3; 471 472 /* Command-line over-ride via acpi_sci= */ 473 if (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) 474 trigger = (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2; 475 476 if (acpi_sci_flags & ACPI_MADT_POLARITY_MASK) 477 polarity = acpi_sci_flags & ACPI_MADT_POLARITY_MASK; 478 479 if (bus_irq < NR_IRQS_LEGACY) 480 mp_override_legacy_irq(bus_irq, polarity, trigger, gsi); 481 else 482 mp_register_ioapic_irq(bus_irq, polarity, trigger, gsi); 483 484 acpi_penalize_sci_irq(bus_irq, trigger, polarity); 485 486 /* 487 * stash over-ride to indicate we've been here 488 * and for later update of acpi_gbl_FADT 489 */ 490 acpi_sci_override_gsi = gsi; 491 return; 492 } 493 494 static int __init 495 acpi_parse_int_src_ovr(union acpi_subtable_headers * header, 496 const unsigned long end) 497 { 498 struct acpi_madt_interrupt_override *intsrc = NULL; 499 500 intsrc = (struct acpi_madt_interrupt_override *)header; 501 502 if (BAD_MADT_ENTRY(intsrc, end)) 503 return -EINVAL; 504 505 acpi_table_print_madt_entry(&header->common); 506 507 if (intsrc->source_irq == acpi_gbl_FADT.sci_interrupt) { 508 acpi_sci_ioapic_setup(intsrc->source_irq, 509 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK, 510 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2, 511 intsrc->global_irq); 512 return 0; 513 } 514 515 if (intsrc->source_irq == 0) { 516 if (acpi_skip_timer_override) { 517 printk(PREFIX "BIOS IRQ0 override ignored.\n"); 518 return 0; 519 } 520 521 if ((intsrc->global_irq == 2) && acpi_fix_pin2_polarity 522 && (intsrc->inti_flags & ACPI_MADT_POLARITY_MASK)) { 523 intsrc->inti_flags &= ~ACPI_MADT_POLARITY_MASK; 524 printk(PREFIX "BIOS IRQ0 pin2 override: forcing polarity to high active.\n"); 525 } 526 } 527 528 mp_override_legacy_irq(intsrc->source_irq, 529 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK, 530 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2, 531 intsrc->global_irq); 532 533 return 0; 534 } 535 536 static int __init 537 acpi_parse_nmi_src(union acpi_subtable_headers * header, const unsigned long end) 538 { 539 struct acpi_madt_nmi_source *nmi_src = NULL; 540 541 nmi_src = (struct acpi_madt_nmi_source *)header; 542 543 if (BAD_MADT_ENTRY(nmi_src, end)) 544 return -EINVAL; 545 546 acpi_table_print_madt_entry(&header->common); 547 548 /* TBD: Support nimsrc entries? */ 549 550 return 0; 551 } 552 553 #endif /* CONFIG_X86_IO_APIC */ 554 555 /* 556 * acpi_pic_sci_set_trigger() 557 * 558 * use ELCR to set PIC-mode trigger type for SCI 559 * 560 * If a PIC-mode SCI is not recognized or gives spurious IRQ7's 561 * it may require Edge Trigger -- use "acpi_sci=edge" 562 * 563 * Port 0x4d0-4d1 are ECLR1 and ECLR2, the Edge/Level Control Registers 564 * for the 8259 PIC. bit[n] = 1 means irq[n] is Level, otherwise Edge. 565 * ECLR1 is IRQs 0-7 (IRQ 0, 1, 2 must be 0) 566 * ECLR2 is IRQs 8-15 (IRQ 8, 13 must be 0) 567 */ 568 569 void __init acpi_pic_sci_set_trigger(unsigned int irq, u16 trigger) 570 { 571 unsigned int mask = 1 << irq; 572 unsigned int old, new; 573 574 /* Real old ELCR mask */ 575 old = inb(0x4d0) | (inb(0x4d1) << 8); 576 577 /* 578 * If we use ACPI to set PCI IRQs, then we should clear ELCR 579 * since we will set it correctly as we enable the PCI irq 580 * routing. 581 */ 582 new = acpi_noirq ? old : 0; 583 584 /* 585 * Update SCI information in the ELCR, it isn't in the PCI 586 * routing tables.. 587 */ 588 switch (trigger) { 589 case 1: /* Edge - clear */ 590 new &= ~mask; 591 break; 592 case 3: /* Level - set */ 593 new |= mask; 594 break; 595 } 596 597 if (old == new) 598 return; 599 600 printk(PREFIX "setting ELCR to %04x (from %04x)\n", new, old); 601 outb(new, 0x4d0); 602 outb(new >> 8, 0x4d1); 603 } 604 605 int acpi_gsi_to_irq(u32 gsi, unsigned int *irqp) 606 { 607 int rc, irq, trigger, polarity; 608 609 if (acpi_irq_model == ACPI_IRQ_MODEL_PIC) { 610 *irqp = gsi; 611 return 0; 612 } 613 614 rc = acpi_get_override_irq(gsi, &trigger, &polarity); 615 if (rc) 616 return rc; 617 618 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 return irq; 623 624 *irqp = irq; 625 return 0; 626 } 627 EXPORT_SYMBOL_GPL(acpi_gsi_to_irq); 628 629 int acpi_isa_irq_to_gsi(unsigned isa_irq, u32 *gsi) 630 { 631 if (isa_irq < nr_legacy_irqs() && 632 isa_irq_to_gsi[isa_irq] != INVALID_ACPI_IRQ) { 633 *gsi = isa_irq_to_gsi[isa_irq]; 634 return 0; 635 } 636 637 return -1; 638 } 639 640 static int acpi_register_gsi_pic(struct device *dev, u32 gsi, 641 int trigger, int polarity) 642 { 643 #ifdef CONFIG_PCI 644 /* 645 * Make sure all (legacy) PCI IRQs are set as level-triggered. 646 */ 647 if (trigger == ACPI_LEVEL_SENSITIVE) 648 elcr_set_level_irq(gsi); 649 #endif 650 651 return gsi; 652 } 653 654 #ifdef CONFIG_X86_LOCAL_APIC 655 static int acpi_register_gsi_ioapic(struct device *dev, u32 gsi, 656 int trigger, int polarity) 657 { 658 int irq = gsi; 659 #ifdef CONFIG_X86_IO_APIC 660 int node; 661 struct irq_alloc_info info; 662 663 node = dev ? dev_to_node(dev) : NUMA_NO_NODE; 664 trigger = trigger == ACPI_EDGE_SENSITIVE ? 0 : 1; 665 polarity = polarity == ACPI_ACTIVE_HIGH ? 0 : 1; 666 ioapic_set_alloc_attr(&info, node, trigger, polarity); 667 668 mutex_lock(&acpi_ioapic_lock); 669 irq = mp_map_gsi_to_irq(gsi, IOAPIC_MAP_ALLOC, &info); 670 /* Don't set up the ACPI SCI because it's already set up */ 671 if (irq >= 0 && enable_update_mptable && gsi != acpi_gbl_FADT.sci_interrupt) 672 mp_config_acpi_gsi(dev, gsi, trigger, polarity); 673 mutex_unlock(&acpi_ioapic_lock); 674 #endif 675 676 return irq; 677 } 678 679 static void acpi_unregister_gsi_ioapic(u32 gsi) 680 { 681 #ifdef CONFIG_X86_IO_APIC 682 int irq; 683 684 mutex_lock(&acpi_ioapic_lock); 685 irq = mp_map_gsi_to_irq(gsi, 0, NULL); 686 if (irq > 0) 687 mp_unmap_irq(irq); 688 mutex_unlock(&acpi_ioapic_lock); 689 #endif 690 } 691 #endif 692 693 int (*__acpi_register_gsi)(struct device *dev, u32 gsi, 694 int trigger, int polarity) = acpi_register_gsi_pic; 695 void (*__acpi_unregister_gsi)(u32 gsi) = NULL; 696 697 #ifdef CONFIG_ACPI_SLEEP 698 int (*acpi_suspend_lowlevel)(void) = x86_acpi_suspend_lowlevel; 699 #else 700 int (*acpi_suspend_lowlevel)(void); 701 #endif 702 703 /* 704 * success: return IRQ number (>=0) 705 * failure: return < 0 706 */ 707 int acpi_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity) 708 { 709 return __acpi_register_gsi(dev, gsi, trigger, polarity); 710 } 711 EXPORT_SYMBOL_GPL(acpi_register_gsi); 712 713 void acpi_unregister_gsi(u32 gsi) 714 { 715 if (__acpi_unregister_gsi) 716 __acpi_unregister_gsi(gsi); 717 } 718 EXPORT_SYMBOL_GPL(acpi_unregister_gsi); 719 720 #ifdef CONFIG_X86_LOCAL_APIC 721 static void __init acpi_set_irq_model_ioapic(void) 722 { 723 acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC; 724 __acpi_register_gsi = acpi_register_gsi_ioapic; 725 __acpi_unregister_gsi = acpi_unregister_gsi_ioapic; 726 acpi_ioapic = 1; 727 } 728 #endif 729 730 /* 731 * ACPI based hotplug support for CPU 732 */ 733 #ifdef CONFIG_ACPI_HOTPLUG_CPU 734 #include <acpi/processor.h> 735 736 static int acpi_map_cpu2node(acpi_handle handle, int cpu, int physid) 737 { 738 #ifdef CONFIG_ACPI_NUMA 739 int nid; 740 741 nid = acpi_get_node(handle); 742 if (nid != NUMA_NO_NODE) { 743 set_apicid_to_node(physid, nid); 744 numa_set_node(cpu, nid); 745 } 746 #endif 747 return 0; 748 } 749 750 int acpi_map_cpu(acpi_handle handle, phys_cpuid_t physid, u32 acpi_id, 751 int *pcpu) 752 { 753 int cpu; 754 755 cpu = acpi_register_lapic(physid, acpi_id, ACPI_MADT_ENABLED); 756 if (cpu < 0) { 757 pr_info(PREFIX "Unable to map lapic to logical cpu number\n"); 758 return cpu; 759 } 760 761 acpi_processor_set_pdc(handle); 762 acpi_map_cpu2node(handle, cpu, physid); 763 764 *pcpu = cpu; 765 return 0; 766 } 767 EXPORT_SYMBOL(acpi_map_cpu); 768 769 int acpi_unmap_cpu(int cpu) 770 { 771 #ifdef CONFIG_ACPI_NUMA 772 set_apicid_to_node(per_cpu(x86_cpu_to_apicid, cpu), NUMA_NO_NODE); 773 #endif 774 775 per_cpu(x86_cpu_to_apicid, cpu) = -1; 776 set_cpu_present(cpu, false); 777 num_processors--; 778 779 return (0); 780 } 781 EXPORT_SYMBOL(acpi_unmap_cpu); 782 #endif /* CONFIG_ACPI_HOTPLUG_CPU */ 783 784 int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base) 785 { 786 int ret = -ENOSYS; 787 #ifdef CONFIG_ACPI_HOTPLUG_IOAPIC 788 int ioapic_id; 789 u64 addr; 790 struct ioapic_domain_cfg cfg = { 791 .type = IOAPIC_DOMAIN_DYNAMIC, 792 .ops = &mp_ioapic_irqdomain_ops, 793 }; 794 795 ioapic_id = acpi_get_ioapic_id(handle, gsi_base, &addr); 796 if (ioapic_id < 0) { 797 unsigned long long uid; 798 acpi_status status; 799 800 status = acpi_evaluate_integer(handle, METHOD_NAME__UID, 801 NULL, &uid); 802 if (ACPI_FAILURE(status)) { 803 acpi_handle_warn(handle, "failed to get IOAPIC ID.\n"); 804 return -EINVAL; 805 } 806 ioapic_id = (int)uid; 807 } 808 809 mutex_lock(&acpi_ioapic_lock); 810 ret = mp_register_ioapic(ioapic_id, phys_addr, gsi_base, &cfg); 811 mutex_unlock(&acpi_ioapic_lock); 812 #endif 813 814 return ret; 815 } 816 EXPORT_SYMBOL(acpi_register_ioapic); 817 818 int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base) 819 { 820 int ret = -ENOSYS; 821 822 #ifdef CONFIG_ACPI_HOTPLUG_IOAPIC 823 mutex_lock(&acpi_ioapic_lock); 824 ret = mp_unregister_ioapic(gsi_base); 825 mutex_unlock(&acpi_ioapic_lock); 826 #endif 827 828 return ret; 829 } 830 EXPORT_SYMBOL(acpi_unregister_ioapic); 831 832 /** 833 * acpi_ioapic_registered - Check whether IOAPIC assoicatied with @gsi_base 834 * has been registered 835 * @handle: ACPI handle of the IOAPIC device 836 * @gsi_base: GSI base associated with the IOAPIC 837 * 838 * Assume caller holds some type of lock to serialize acpi_ioapic_registered() 839 * with acpi_register_ioapic()/acpi_unregister_ioapic(). 840 */ 841 int acpi_ioapic_registered(acpi_handle handle, u32 gsi_base) 842 { 843 int ret = 0; 844 845 #ifdef CONFIG_ACPI_HOTPLUG_IOAPIC 846 mutex_lock(&acpi_ioapic_lock); 847 ret = mp_ioapic_registered(gsi_base); 848 mutex_unlock(&acpi_ioapic_lock); 849 #endif 850 851 return ret; 852 } 853 854 static int __init acpi_parse_sbf(struct acpi_table_header *table) 855 { 856 struct acpi_table_boot *sb = (struct acpi_table_boot *)table; 857 858 sbf_port = sb->cmos_index; /* Save CMOS port */ 859 860 return 0; 861 } 862 863 #ifdef CONFIG_HPET_TIMER 864 #include <asm/hpet.h> 865 866 static struct resource *hpet_res __initdata; 867 868 static int __init acpi_parse_hpet(struct acpi_table_header *table) 869 { 870 struct acpi_table_hpet *hpet_tbl = (struct acpi_table_hpet *)table; 871 872 if (hpet_tbl->address.space_id != ACPI_SPACE_MEM) { 873 printk(KERN_WARNING PREFIX "HPET timers must be located in " 874 "memory.\n"); 875 return -1; 876 } 877 878 hpet_address = hpet_tbl->address.address; 879 hpet_blockid = hpet_tbl->sequence; 880 881 /* 882 * Some broken BIOSes advertise HPET at 0x0. We really do not 883 * want to allocate a resource there. 884 */ 885 if (!hpet_address) { 886 printk(KERN_WARNING PREFIX 887 "HPET id: %#x base: %#lx is invalid\n", 888 hpet_tbl->id, hpet_address); 889 return 0; 890 } 891 #ifdef CONFIG_X86_64 892 /* 893 * Some even more broken BIOSes advertise HPET at 894 * 0xfed0000000000000 instead of 0xfed00000. Fix it up and add 895 * some noise: 896 */ 897 if (hpet_address == 0xfed0000000000000UL) { 898 if (!hpet_force_user) { 899 printk(KERN_WARNING PREFIX "HPET id: %#x " 900 "base: 0xfed0000000000000 is bogus\n " 901 "try hpet=force on the kernel command line to " 902 "fix it up to 0xfed00000.\n", hpet_tbl->id); 903 hpet_address = 0; 904 return 0; 905 } 906 printk(KERN_WARNING PREFIX 907 "HPET id: %#x base: 0xfed0000000000000 fixed up " 908 "to 0xfed00000.\n", hpet_tbl->id); 909 hpet_address >>= 32; 910 } 911 #endif 912 printk(KERN_INFO PREFIX "HPET id: %#x base: %#lx\n", 913 hpet_tbl->id, hpet_address); 914 915 /* 916 * Allocate and initialize the HPET firmware resource for adding into 917 * the resource tree during the lateinit timeframe. 918 */ 919 #define HPET_RESOURCE_NAME_SIZE 9 920 hpet_res = memblock_alloc(sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE, 921 SMP_CACHE_BYTES); 922 if (!hpet_res) 923 panic("%s: Failed to allocate %zu bytes\n", __func__, 924 sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE); 925 926 hpet_res->name = (void *)&hpet_res[1]; 927 hpet_res->flags = IORESOURCE_MEM; 928 snprintf((char *)hpet_res->name, HPET_RESOURCE_NAME_SIZE, "HPET %u", 929 hpet_tbl->sequence); 930 931 hpet_res->start = hpet_address; 932 hpet_res->end = hpet_address + (1 * 1024) - 1; 933 934 return 0; 935 } 936 937 /* 938 * hpet_insert_resource inserts the HPET resources used into the resource 939 * tree. 940 */ 941 static __init int hpet_insert_resource(void) 942 { 943 if (!hpet_res) 944 return 1; 945 946 return insert_resource(&iomem_resource, hpet_res); 947 } 948 949 late_initcall(hpet_insert_resource); 950 951 #else 952 #define acpi_parse_hpet NULL 953 #endif 954 955 static int __init acpi_parse_fadt(struct acpi_table_header *table) 956 { 957 if (!(acpi_gbl_FADT.boot_flags & ACPI_FADT_LEGACY_DEVICES)) { 958 pr_debug("ACPI: no legacy devices present\n"); 959 x86_platform.legacy.devices.pnpbios = 0; 960 } 961 962 if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID && 963 !(acpi_gbl_FADT.boot_flags & ACPI_FADT_8042) && 964 x86_platform.legacy.i8042 != X86_LEGACY_I8042_PLATFORM_ABSENT) { 965 pr_debug("ACPI: i8042 controller is absent\n"); 966 x86_platform.legacy.i8042 = X86_LEGACY_I8042_FIRMWARE_ABSENT; 967 } 968 969 if (acpi_gbl_FADT.boot_flags & ACPI_FADT_NO_CMOS_RTC) { 970 pr_debug("ACPI: not registering RTC platform device\n"); 971 x86_platform.legacy.rtc = 0; 972 } 973 974 if (acpi_gbl_FADT.boot_flags & ACPI_FADT_NO_VGA) { 975 pr_debug("ACPI: probing for VGA not safe\n"); 976 x86_platform.legacy.no_vga = 1; 977 } 978 979 #ifdef CONFIG_X86_PM_TIMER 980 /* detect the location of the ACPI PM Timer */ 981 if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID) { 982 /* FADT rev. 2 */ 983 if (acpi_gbl_FADT.xpm_timer_block.space_id != 984 ACPI_ADR_SPACE_SYSTEM_IO) 985 return 0; 986 987 pmtmr_ioport = acpi_gbl_FADT.xpm_timer_block.address; 988 /* 989 * "X" fields are optional extensions to the original V1.0 990 * fields, so we must selectively expand V1.0 fields if the 991 * corresponding X field is zero. 992 */ 993 if (!pmtmr_ioport) 994 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block; 995 } else { 996 /* FADT rev. 1 */ 997 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block; 998 } 999 if (pmtmr_ioport) 1000 printk(KERN_INFO PREFIX "PM-Timer IO Port: %#x\n", 1001 pmtmr_ioport); 1002 #endif 1003 return 0; 1004 } 1005 1006 #ifdef CONFIG_X86_LOCAL_APIC 1007 /* 1008 * Parse LAPIC entries in MADT 1009 * returns 0 on success, < 0 on error 1010 */ 1011 1012 static int __init early_acpi_parse_madt_lapic_addr_ovr(void) 1013 { 1014 int count; 1015 1016 if (!boot_cpu_has(X86_FEATURE_APIC)) 1017 return -ENODEV; 1018 1019 /* 1020 * Note that the LAPIC address is obtained from the MADT (32-bit value) 1021 * and (optionally) overridden by a LAPIC_ADDR_OVR entry (64-bit value). 1022 */ 1023 1024 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE, 1025 acpi_parse_lapic_addr_ovr, 0); 1026 if (count < 0) { 1027 printk(KERN_ERR PREFIX 1028 "Error parsing LAPIC address override entry\n"); 1029 return count; 1030 } 1031 1032 register_lapic_address(acpi_lapic_addr); 1033 1034 return count; 1035 } 1036 1037 static int __init acpi_parse_madt_lapic_entries(void) 1038 { 1039 int count; 1040 int x2count = 0; 1041 int ret; 1042 struct acpi_subtable_proc madt_proc[2]; 1043 1044 if (!boot_cpu_has(X86_FEATURE_APIC)) 1045 return -ENODEV; 1046 1047 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC, 1048 acpi_parse_sapic, MAX_LOCAL_APIC); 1049 1050 if (!count) { 1051 memset(madt_proc, 0, sizeof(madt_proc)); 1052 madt_proc[0].id = ACPI_MADT_TYPE_LOCAL_APIC; 1053 madt_proc[0].handler = acpi_parse_lapic; 1054 madt_proc[1].id = ACPI_MADT_TYPE_LOCAL_X2APIC; 1055 madt_proc[1].handler = acpi_parse_x2apic; 1056 ret = acpi_table_parse_entries_array(ACPI_SIG_MADT, 1057 sizeof(struct acpi_table_madt), 1058 madt_proc, ARRAY_SIZE(madt_proc), MAX_LOCAL_APIC); 1059 if (ret < 0) { 1060 printk(KERN_ERR PREFIX 1061 "Error parsing LAPIC/X2APIC entries\n"); 1062 return ret; 1063 } 1064 1065 count = madt_proc[0].count; 1066 x2count = madt_proc[1].count; 1067 } 1068 if (!count && !x2count) { 1069 printk(KERN_ERR PREFIX "No LAPIC entries present\n"); 1070 /* TBD: Cleanup to allow fallback to MPS */ 1071 return -ENODEV; 1072 } else if (count < 0 || x2count < 0) { 1073 printk(KERN_ERR PREFIX "Error parsing LAPIC entry\n"); 1074 /* TBD: Cleanup to allow fallback to MPS */ 1075 return count; 1076 } 1077 1078 x2count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC_NMI, 1079 acpi_parse_x2apic_nmi, 0); 1080 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI, 1081 acpi_parse_lapic_nmi, 0); 1082 if (count < 0 || x2count < 0) { 1083 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n"); 1084 /* TBD: Cleanup to allow fallback to MPS */ 1085 return count; 1086 } 1087 return 0; 1088 } 1089 #endif /* CONFIG_X86_LOCAL_APIC */ 1090 1091 #ifdef CONFIG_X86_IO_APIC 1092 static void __init mp_config_acpi_legacy_irqs(void) 1093 { 1094 int i; 1095 struct mpc_intsrc mp_irq; 1096 1097 #ifdef CONFIG_EISA 1098 /* 1099 * Fabricate the legacy ISA bus (bus #31). 1100 */ 1101 mp_bus_id_to_type[MP_ISA_BUS] = MP_BUS_ISA; 1102 #endif 1103 set_bit(MP_ISA_BUS, mp_bus_not_pci); 1104 pr_debug("Bus #%d is ISA (nIRQs: %d)\n", MP_ISA_BUS, nr_legacy_irqs()); 1105 1106 /* 1107 * Use the default configuration for the IRQs 0-15. Unless 1108 * overridden by (MADT) interrupt source override entries. 1109 */ 1110 for (i = 0; i < nr_legacy_irqs(); i++) { 1111 int ioapic, pin; 1112 unsigned int dstapic; 1113 int idx; 1114 u32 gsi; 1115 1116 /* Locate the gsi that irq i maps to. */ 1117 if (acpi_isa_irq_to_gsi(i, &gsi)) 1118 continue; 1119 1120 /* 1121 * Locate the IOAPIC that manages the ISA IRQ. 1122 */ 1123 ioapic = mp_find_ioapic(gsi); 1124 if (ioapic < 0) 1125 continue; 1126 pin = mp_find_ioapic_pin(ioapic, gsi); 1127 dstapic = mpc_ioapic_id(ioapic); 1128 1129 for (idx = 0; idx < mp_irq_entries; idx++) { 1130 struct mpc_intsrc *irq = mp_irqs + idx; 1131 1132 /* Do we already have a mapping for this ISA IRQ? */ 1133 if (irq->srcbus == MP_ISA_BUS && irq->srcbusirq == i) 1134 break; 1135 1136 /* Do we already have a mapping for this IOAPIC pin */ 1137 if (irq->dstapic == dstapic && irq->dstirq == pin) 1138 break; 1139 } 1140 1141 if (idx != mp_irq_entries) { 1142 printk(KERN_DEBUG "ACPI: IRQ%d used by override.\n", i); 1143 continue; /* IRQ already used */ 1144 } 1145 1146 mp_irq.type = MP_INTSRC; 1147 mp_irq.irqflag = 0; /* Conforming */ 1148 mp_irq.srcbus = MP_ISA_BUS; 1149 mp_irq.dstapic = dstapic; 1150 mp_irq.irqtype = mp_INT; 1151 mp_irq.srcbusirq = i; /* Identity mapped */ 1152 mp_irq.dstirq = pin; 1153 1154 mp_save_irq(&mp_irq); 1155 } 1156 } 1157 1158 /* 1159 * Parse IOAPIC related entries in MADT 1160 * returns 0 on success, < 0 on error 1161 */ 1162 static int __init acpi_parse_madt_ioapic_entries(void) 1163 { 1164 int count; 1165 1166 /* 1167 * ACPI interpreter is required to complete interrupt setup, 1168 * so if it is off, don't enumerate the io-apics with ACPI. 1169 * If MPS is present, it will handle them, 1170 * otherwise the system will stay in PIC mode 1171 */ 1172 if (acpi_disabled || acpi_noirq) 1173 return -ENODEV; 1174 1175 if (!boot_cpu_has(X86_FEATURE_APIC)) 1176 return -ENODEV; 1177 1178 /* 1179 * if "noapic" boot option, don't look for IO-APICs 1180 */ 1181 if (skip_ioapic_setup) { 1182 printk(KERN_INFO PREFIX "Skipping IOAPIC probe " 1183 "due to 'noapic' option.\n"); 1184 return -ENODEV; 1185 } 1186 1187 count = acpi_table_parse_madt(ACPI_MADT_TYPE_IO_APIC, acpi_parse_ioapic, 1188 MAX_IO_APICS); 1189 if (!count) { 1190 printk(KERN_ERR PREFIX "No IOAPIC entries present\n"); 1191 return -ENODEV; 1192 } else if (count < 0) { 1193 printk(KERN_ERR PREFIX "Error parsing IOAPIC entry\n"); 1194 return count; 1195 } 1196 1197 count = acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE, 1198 acpi_parse_int_src_ovr, nr_irqs); 1199 if (count < 0) { 1200 printk(KERN_ERR PREFIX 1201 "Error parsing interrupt source overrides entry\n"); 1202 /* TBD: Cleanup to allow fallback to MPS */ 1203 return count; 1204 } 1205 1206 /* 1207 * If BIOS did not supply an INT_SRC_OVR for the SCI 1208 * pretend we got one so we can set the SCI flags. 1209 * But ignore setting up SCI on hardware reduced platforms. 1210 */ 1211 if (acpi_sci_override_gsi == INVALID_ACPI_IRQ && !acpi_gbl_reduced_hardware) 1212 acpi_sci_ioapic_setup(acpi_gbl_FADT.sci_interrupt, 0, 0, 1213 acpi_gbl_FADT.sci_interrupt); 1214 1215 /* Fill in identity legacy mappings where no override */ 1216 mp_config_acpi_legacy_irqs(); 1217 1218 count = acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE, 1219 acpi_parse_nmi_src, nr_irqs); 1220 if (count < 0) { 1221 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n"); 1222 /* TBD: Cleanup to allow fallback to MPS */ 1223 return count; 1224 } 1225 1226 return 0; 1227 } 1228 #else 1229 static inline int acpi_parse_madt_ioapic_entries(void) 1230 { 1231 return -1; 1232 } 1233 #endif /* !CONFIG_X86_IO_APIC */ 1234 1235 static void __init early_acpi_process_madt(void) 1236 { 1237 #ifdef CONFIG_X86_LOCAL_APIC 1238 int error; 1239 1240 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) { 1241 1242 /* 1243 * Parse MADT LAPIC entries 1244 */ 1245 error = early_acpi_parse_madt_lapic_addr_ovr(); 1246 if (!error) { 1247 acpi_lapic = 1; 1248 smp_found_config = 1; 1249 } 1250 if (error == -EINVAL) { 1251 /* 1252 * Dell Precision Workstation 410, 610 come here. 1253 */ 1254 printk(KERN_ERR PREFIX 1255 "Invalid BIOS MADT, disabling ACPI\n"); 1256 disable_acpi(); 1257 } 1258 } 1259 #endif 1260 } 1261 1262 static void __init acpi_process_madt(void) 1263 { 1264 #ifdef CONFIG_X86_LOCAL_APIC 1265 int error; 1266 1267 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) { 1268 1269 /* 1270 * Parse MADT LAPIC entries 1271 */ 1272 error = acpi_parse_madt_lapic_entries(); 1273 if (!error) { 1274 acpi_lapic = 1; 1275 1276 /* 1277 * Parse MADT IO-APIC entries 1278 */ 1279 mutex_lock(&acpi_ioapic_lock); 1280 error = acpi_parse_madt_ioapic_entries(); 1281 mutex_unlock(&acpi_ioapic_lock); 1282 if (!error) { 1283 acpi_set_irq_model_ioapic(); 1284 1285 smp_found_config = 1; 1286 } 1287 } 1288 if (error == -EINVAL) { 1289 /* 1290 * Dell Precision Workstation 410, 610 come here. 1291 */ 1292 printk(KERN_ERR PREFIX 1293 "Invalid BIOS MADT, disabling ACPI\n"); 1294 disable_acpi(); 1295 } 1296 } else { 1297 /* 1298 * ACPI found no MADT, and so ACPI wants UP PIC mode. 1299 * In the event an MPS table was found, forget it. 1300 * Boot with "acpi=off" to use MPS on such a system. 1301 */ 1302 if (smp_found_config) { 1303 printk(KERN_WARNING PREFIX 1304 "No APIC-table, disabling MPS\n"); 1305 smp_found_config = 0; 1306 } 1307 } 1308 1309 /* 1310 * ACPI supports both logical (e.g. Hyper-Threading) and physical 1311 * processors, where MPS only supports physical. 1312 */ 1313 if (acpi_lapic && acpi_ioapic) 1314 printk(KERN_INFO "Using ACPI (MADT) for SMP configuration " 1315 "information\n"); 1316 else if (acpi_lapic) 1317 printk(KERN_INFO "Using ACPI for processor (LAPIC) " 1318 "configuration information\n"); 1319 #endif 1320 return; 1321 } 1322 1323 static int __init disable_acpi_irq(const struct dmi_system_id *d) 1324 { 1325 if (!acpi_force) { 1326 printk(KERN_NOTICE "%s detected: force use of acpi=noirq\n", 1327 d->ident); 1328 acpi_noirq_set(); 1329 } 1330 return 0; 1331 } 1332 1333 static int __init disable_acpi_pci(const struct dmi_system_id *d) 1334 { 1335 if (!acpi_force) { 1336 printk(KERN_NOTICE "%s detected: force use of pci=noacpi\n", 1337 d->ident); 1338 acpi_disable_pci(); 1339 } 1340 return 0; 1341 } 1342 1343 static int __init dmi_disable_acpi(const struct dmi_system_id *d) 1344 { 1345 if (!acpi_force) { 1346 printk(KERN_NOTICE "%s detected: acpi off\n", d->ident); 1347 disable_acpi(); 1348 } else { 1349 printk(KERN_NOTICE 1350 "Warning: DMI blacklist says broken, but acpi forced\n"); 1351 } 1352 return 0; 1353 } 1354 1355 /* 1356 * Force ignoring BIOS IRQ0 override 1357 */ 1358 static int __init dmi_ignore_irq0_timer_override(const struct dmi_system_id *d) 1359 { 1360 if (!acpi_skip_timer_override) { 1361 pr_notice("%s detected: Ignoring BIOS IRQ0 override\n", 1362 d->ident); 1363 acpi_skip_timer_override = 1; 1364 } 1365 return 0; 1366 } 1367 1368 /* 1369 * ACPI offers an alternative platform interface model that removes 1370 * ACPI hardware requirements for platforms that do not implement 1371 * the PC Architecture. 1372 * 1373 * We initialize the Hardware-reduced ACPI model here: 1374 */ 1375 void __init acpi_generic_reduced_hw_init(void) 1376 { 1377 /* 1378 * Override x86_init functions and bypass legacy PIC in 1379 * hardware reduced ACPI mode. 1380 */ 1381 x86_init.timers.timer_init = x86_init_noop; 1382 x86_init.irqs.pre_vector_init = x86_init_noop; 1383 legacy_pic = &null_legacy_pic; 1384 } 1385 1386 static void __init acpi_reduced_hw_init(void) 1387 { 1388 if (acpi_gbl_reduced_hardware) 1389 x86_init.acpi.reduced_hw_early_init(); 1390 } 1391 1392 /* 1393 * If your system is blacklisted here, but you find that acpi=force 1394 * works for you, please contact linux-acpi@vger.kernel.org 1395 */ 1396 static const struct dmi_system_id acpi_dmi_table[] __initconst = { 1397 /* 1398 * Boxes that need ACPI disabled 1399 */ 1400 { 1401 .callback = dmi_disable_acpi, 1402 .ident = "IBM Thinkpad", 1403 .matches = { 1404 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), 1405 DMI_MATCH(DMI_BOARD_NAME, "2629H1G"), 1406 }, 1407 }, 1408 1409 /* 1410 * Boxes that need ACPI PCI IRQ routing disabled 1411 */ 1412 { 1413 .callback = disable_acpi_irq, 1414 .ident = "ASUS A7V", 1415 .matches = { 1416 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC"), 1417 DMI_MATCH(DMI_BOARD_NAME, "<A7V>"), 1418 /* newer BIOS, Revision 1011, does work */ 1419 DMI_MATCH(DMI_BIOS_VERSION, 1420 "ASUS A7V ACPI BIOS Revision 1007"), 1421 }, 1422 }, 1423 { 1424 /* 1425 * Latest BIOS for IBM 600E (1.16) has bad pcinum 1426 * for LPC bridge, which is needed for the PCI 1427 * interrupt links to work. DSDT fix is in bug 5966. 1428 * 2645, 2646 model numbers are shared with 600/600E/600X 1429 */ 1430 .callback = disable_acpi_irq, 1431 .ident = "IBM Thinkpad 600 Series 2645", 1432 .matches = { 1433 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), 1434 DMI_MATCH(DMI_BOARD_NAME, "2645"), 1435 }, 1436 }, 1437 { 1438 .callback = disable_acpi_irq, 1439 .ident = "IBM Thinkpad 600 Series 2646", 1440 .matches = { 1441 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), 1442 DMI_MATCH(DMI_BOARD_NAME, "2646"), 1443 }, 1444 }, 1445 /* 1446 * Boxes that need ACPI PCI IRQ routing and PCI scan disabled 1447 */ 1448 { /* _BBN 0 bug */ 1449 .callback = disable_acpi_pci, 1450 .ident = "ASUS PR-DLS", 1451 .matches = { 1452 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."), 1453 DMI_MATCH(DMI_BOARD_NAME, "PR-DLS"), 1454 DMI_MATCH(DMI_BIOS_VERSION, 1455 "ASUS PR-DLS ACPI BIOS Revision 1010"), 1456 DMI_MATCH(DMI_BIOS_DATE, "03/21/2003") 1457 }, 1458 }, 1459 { 1460 .callback = disable_acpi_pci, 1461 .ident = "Acer TravelMate 36x Laptop", 1462 .matches = { 1463 DMI_MATCH(DMI_SYS_VENDOR, "Acer"), 1464 DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"), 1465 }, 1466 }, 1467 {} 1468 }; 1469 1470 /* second table for DMI checks that should run after early-quirks */ 1471 static const struct dmi_system_id acpi_dmi_table_late[] __initconst = { 1472 /* 1473 * HP laptops which use a DSDT reporting as HP/SB400/10000, 1474 * which includes some code which overrides all temperature 1475 * trip points to 16C if the INTIN2 input of the I/O APIC 1476 * is enabled. This input is incorrectly designated the 1477 * ISA IRQ 0 via an interrupt source override even though 1478 * it is wired to the output of the master 8259A and INTIN0 1479 * is not connected at all. Force ignoring BIOS IRQ0 1480 * override in that cases. 1481 */ 1482 { 1483 .callback = dmi_ignore_irq0_timer_override, 1484 .ident = "HP nx6115 laptop", 1485 .matches = { 1486 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 1487 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6115"), 1488 }, 1489 }, 1490 { 1491 .callback = dmi_ignore_irq0_timer_override, 1492 .ident = "HP NX6125 laptop", 1493 .matches = { 1494 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 1495 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6125"), 1496 }, 1497 }, 1498 { 1499 .callback = dmi_ignore_irq0_timer_override, 1500 .ident = "HP NX6325 laptop", 1501 .matches = { 1502 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 1503 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6325"), 1504 }, 1505 }, 1506 { 1507 .callback = dmi_ignore_irq0_timer_override, 1508 .ident = "HP 6715b laptop", 1509 .matches = { 1510 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 1511 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq 6715b"), 1512 }, 1513 }, 1514 { 1515 .callback = dmi_ignore_irq0_timer_override, 1516 .ident = "FUJITSU SIEMENS", 1517 .matches = { 1518 DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"), 1519 DMI_MATCH(DMI_PRODUCT_NAME, "AMILO PRO V2030"), 1520 }, 1521 }, 1522 {} 1523 }; 1524 1525 /* 1526 * acpi_boot_table_init() and acpi_boot_init() 1527 * called from setup_arch(), always. 1528 * 1. checksums all tables 1529 * 2. enumerates lapics 1530 * 3. enumerates io-apics 1531 * 1532 * acpi_table_init() is separate to allow reading SRAT without 1533 * other side effects. 1534 * 1535 * side effects of acpi_boot_init: 1536 * acpi_lapic = 1 if LAPIC found 1537 * acpi_ioapic = 1 if IOAPIC found 1538 * if (acpi_lapic && acpi_ioapic) smp_found_config = 1; 1539 * if acpi_blacklisted() acpi_disabled = 1; 1540 * acpi_irq_model=... 1541 * ... 1542 */ 1543 1544 void __init acpi_boot_table_init(void) 1545 { 1546 dmi_check_system(acpi_dmi_table); 1547 1548 /* 1549 * If acpi_disabled, bail out 1550 */ 1551 if (acpi_disabled) 1552 return; 1553 1554 /* 1555 * Initialize the ACPI boot-time table parser. 1556 */ 1557 if (acpi_table_init()) { 1558 disable_acpi(); 1559 return; 1560 } 1561 1562 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf); 1563 1564 /* 1565 * blacklist may disable ACPI entirely 1566 */ 1567 if (acpi_blacklisted()) { 1568 if (acpi_force) { 1569 printk(KERN_WARNING PREFIX "acpi=force override\n"); 1570 } else { 1571 printk(KERN_WARNING PREFIX "Disabling ACPI support\n"); 1572 disable_acpi(); 1573 return; 1574 } 1575 } 1576 } 1577 1578 int __init early_acpi_boot_init(void) 1579 { 1580 /* 1581 * If acpi_disabled, bail out 1582 */ 1583 if (acpi_disabled) 1584 return 1; 1585 1586 /* 1587 * Process the Multiple APIC Description Table (MADT), if present 1588 */ 1589 early_acpi_process_madt(); 1590 1591 /* 1592 * Hardware-reduced ACPI mode initialization: 1593 */ 1594 acpi_reduced_hw_init(); 1595 1596 return 0; 1597 } 1598 1599 int __init acpi_boot_init(void) 1600 { 1601 /* those are executed after early-quirks are executed */ 1602 dmi_check_system(acpi_dmi_table_late); 1603 1604 /* 1605 * If acpi_disabled, bail out 1606 */ 1607 if (acpi_disabled) 1608 return 1; 1609 1610 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf); 1611 1612 /* 1613 * set sci_int and PM timer address 1614 */ 1615 acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt); 1616 1617 /* 1618 * Process the Multiple APIC Description Table (MADT), if present 1619 */ 1620 acpi_process_madt(); 1621 1622 acpi_table_parse(ACPI_SIG_HPET, acpi_parse_hpet); 1623 if (IS_ENABLED(CONFIG_ACPI_BGRT) && !acpi_nobgrt) 1624 acpi_table_parse(ACPI_SIG_BGRT, acpi_parse_bgrt); 1625 1626 if (!acpi_noirq) 1627 x86_init.pci.init = pci_acpi_init; 1628 1629 /* Do not enable ACPI SPCR console by default */ 1630 acpi_parse_spcr(earlycon_acpi_spcr_enable, false); 1631 return 0; 1632 } 1633 1634 static int __init parse_acpi(char *arg) 1635 { 1636 if (!arg) 1637 return -EINVAL; 1638 1639 /* "acpi=off" disables both ACPI table parsing and interpreter */ 1640 if (strcmp(arg, "off") == 0) { 1641 disable_acpi(); 1642 } 1643 /* acpi=force to over-ride black-list */ 1644 else if (strcmp(arg, "force") == 0) { 1645 acpi_force = 1; 1646 acpi_disabled = 0; 1647 } 1648 /* acpi=strict disables out-of-spec workarounds */ 1649 else if (strcmp(arg, "strict") == 0) { 1650 acpi_strict = 1; 1651 } 1652 /* acpi=rsdt use RSDT instead of XSDT */ 1653 else if (strcmp(arg, "rsdt") == 0) { 1654 acpi_gbl_do_not_use_xsdt = TRUE; 1655 } 1656 /* "acpi=noirq" disables ACPI interrupt routing */ 1657 else if (strcmp(arg, "noirq") == 0) { 1658 acpi_noirq_set(); 1659 } 1660 /* "acpi=copy_dsdt" copys DSDT */ 1661 else if (strcmp(arg, "copy_dsdt") == 0) { 1662 acpi_gbl_copy_dsdt_locally = 1; 1663 } 1664 /* "acpi=nocmcff" disables FF mode for corrected errors */ 1665 else if (strcmp(arg, "nocmcff") == 0) { 1666 acpi_disable_cmcff = 1; 1667 } else { 1668 /* Core will printk when we return error. */ 1669 return -EINVAL; 1670 } 1671 return 0; 1672 } 1673 early_param("acpi", parse_acpi); 1674 1675 static int __init parse_acpi_bgrt(char *arg) 1676 { 1677 acpi_nobgrt = true; 1678 return 0; 1679 } 1680 early_param("bgrt_disable", parse_acpi_bgrt); 1681 1682 /* FIXME: Using pci= for an ACPI parameter is a travesty. */ 1683 static int __init parse_pci(char *arg) 1684 { 1685 if (arg && strcmp(arg, "noacpi") == 0) 1686 acpi_disable_pci(); 1687 return 0; 1688 } 1689 early_param("pci", parse_pci); 1690 1691 int __init acpi_mps_check(void) 1692 { 1693 #if defined(CONFIG_X86_LOCAL_APIC) && !defined(CONFIG_X86_MPPARSE) 1694 /* mptable code is not built-in*/ 1695 if (acpi_disabled || acpi_noirq) { 1696 printk(KERN_WARNING "MPS support code is not built-in.\n" 1697 "Using acpi=off or acpi=noirq or pci=noacpi " 1698 "may have problem\n"); 1699 return 1; 1700 } 1701 #endif 1702 return 0; 1703 } 1704 1705 #ifdef CONFIG_X86_IO_APIC 1706 static int __init parse_acpi_skip_timer_override(char *arg) 1707 { 1708 acpi_skip_timer_override = 1; 1709 return 0; 1710 } 1711 early_param("acpi_skip_timer_override", parse_acpi_skip_timer_override); 1712 1713 static int __init parse_acpi_use_timer_override(char *arg) 1714 { 1715 acpi_use_timer_override = 1; 1716 return 0; 1717 } 1718 early_param("acpi_use_timer_override", parse_acpi_use_timer_override); 1719 #endif /* CONFIG_X86_IO_APIC */ 1720 1721 static int __init setup_acpi_sci(char *s) 1722 { 1723 if (!s) 1724 return -EINVAL; 1725 if (!strcmp(s, "edge")) 1726 acpi_sci_flags = ACPI_MADT_TRIGGER_EDGE | 1727 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK); 1728 else if (!strcmp(s, "level")) 1729 acpi_sci_flags = ACPI_MADT_TRIGGER_LEVEL | 1730 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK); 1731 else if (!strcmp(s, "high")) 1732 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_HIGH | 1733 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK); 1734 else if (!strcmp(s, "low")) 1735 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_LOW | 1736 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK); 1737 else 1738 return -EINVAL; 1739 return 0; 1740 } 1741 early_param("acpi_sci", setup_acpi_sci); 1742 1743 int __acpi_acquire_global_lock(unsigned int *lock) 1744 { 1745 unsigned int old, new, val; 1746 do { 1747 old = *lock; 1748 new = (((old & ~0x3) + 2) + ((old >> 1) & 0x1)); 1749 val = cmpxchg(lock, old, new); 1750 } while (unlikely (val != old)); 1751 return ((new & 0x3) < 3) ? -1 : 0; 1752 } 1753 1754 int __acpi_release_global_lock(unsigned int *lock) 1755 { 1756 unsigned int old, new, val; 1757 do { 1758 old = *lock; 1759 new = old & ~0x3; 1760 val = cmpxchg(lock, old, new); 1761 } while (unlikely (val != old)); 1762 return old & 0x1; 1763 } 1764 1765 void __init arch_reserve_mem_area(acpi_physical_address addr, size_t size) 1766 { 1767 e820__range_add(addr, size, E820_TYPE_ACPI); 1768 e820__update_table_print(); 1769 } 1770 1771 void x86_default_set_root_pointer(u64 addr) 1772 { 1773 boot_params.acpi_rsdp_addr = addr; 1774 } 1775 1776 u64 x86_default_get_root_pointer(void) 1777 { 1778 return boot_params.acpi_rsdp_addr; 1779 } 1780