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 #define pr_fmt(fmt) "ACPI: " fmt 9 10 #include <linux/init.h> 11 #include <linux/acpi.h> 12 #include <linux/acpi_pmtmr.h> 13 #include <linux/efi.h> 14 #include <linux/cpumask.h> 15 #include <linux/export.h> 16 #include <linux/dmi.h> 17 #include <linux/irq.h> 18 #include <linux/slab.h> 19 #include <linux/memblock.h> 20 #include <linux/ioport.h> 21 #include <linux/pci.h> 22 #include <linux/efi-bgrt.h> 23 #include <linux/serial_core.h> 24 #include <linux/pgtable.h> 25 26 #include <asm/e820/api.h> 27 #include <asm/irqdomain.h> 28 #include <asm/pci_x86.h> 29 #include <asm/io_apic.h> 30 #include <asm/apic.h> 31 #include <asm/io.h> 32 #include <asm/mpspec.h> 33 #include <asm/smp.h> 34 #include <asm/i8259.h> 35 #include <asm/setup.h> 36 37 #include "sleep.h" /* To include x86_acpi_suspend_lowlevel */ 38 static int __initdata acpi_force = 0; 39 int acpi_disabled; 40 EXPORT_SYMBOL(acpi_disabled); 41 42 #ifdef CONFIG_X86_64 43 # include <asm/proto.h> 44 #endif /* X86 */ 45 46 int acpi_noirq; /* skip ACPI IRQ initialization */ 47 static int acpi_nobgrt; /* skip ACPI BGRT */ 48 int acpi_pci_disabled; /* skip ACPI PCI scan and IRQ initialization */ 49 EXPORT_SYMBOL(acpi_pci_disabled); 50 51 int acpi_lapic; 52 int acpi_ioapic; 53 int acpi_strict; 54 int acpi_disable_cmcff; 55 56 /* ACPI SCI override configuration */ 57 u8 acpi_sci_flags __initdata; 58 u32 acpi_sci_override_gsi __initdata = INVALID_ACPI_IRQ; 59 int acpi_skip_timer_override __initdata; 60 int acpi_use_timer_override __initdata; 61 int acpi_fix_pin2_polarity __initdata; 62 63 #ifdef CONFIG_X86_LOCAL_APIC 64 static u64 acpi_lapic_addr __initdata = APIC_DEFAULT_PHYS_BASE; 65 #endif 66 67 #ifdef CONFIG_X86_IO_APIC 68 /* 69 * Locks related to IOAPIC hotplug 70 * Hotplug side: 71 * ->device_hotplug_lock 72 * ->acpi_ioapic_lock 73 * ->ioapic_lock 74 * Interrupt mapping side: 75 * ->acpi_ioapic_lock 76 * ->ioapic_mutex 77 * ->ioapic_lock 78 */ 79 static DEFINE_MUTEX(acpi_ioapic_lock); 80 #endif 81 82 /* -------------------------------------------------------------------------- 83 Boot-time Configuration 84 -------------------------------------------------------------------------- */ 85 86 /* 87 * The default interrupt routing model is PIC (8259). This gets 88 * overridden if IOAPICs are enumerated (below). 89 */ 90 enum acpi_irq_model_id acpi_irq_model = ACPI_IRQ_MODEL_PIC; 91 92 93 /* 94 * ISA irqs by default are the first 16 gsis but can be 95 * any gsi as specified by an interrupt source override. 96 */ 97 static u32 isa_irq_to_gsi[NR_IRQS_LEGACY] __read_mostly = { 98 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 99 }; 100 101 /* 102 * This is just a simple wrapper around early_memremap(), 103 * with sanity checks for phys == 0 and size == 0. 104 */ 105 void __init __iomem *__acpi_map_table(unsigned long phys, unsigned long size) 106 { 107 108 if (!phys || !size) 109 return NULL; 110 111 return early_memremap(phys, size); 112 } 113 114 void __init __acpi_unmap_table(void __iomem *map, unsigned long size) 115 { 116 if (!map || !size) 117 return; 118 119 early_memunmap(map, size); 120 } 121 122 #ifdef CONFIG_X86_LOCAL_APIC 123 static int __init acpi_parse_madt(struct acpi_table_header *table) 124 { 125 struct acpi_table_madt *madt = NULL; 126 127 if (!boot_cpu_has(X86_FEATURE_APIC)) 128 return -EINVAL; 129 130 madt = (struct acpi_table_madt *)table; 131 if (!madt) { 132 pr_warn("Unable to map MADT\n"); 133 return -ENODEV; 134 } 135 136 if (madt->address) { 137 acpi_lapic_addr = (u64) madt->address; 138 139 pr_debug("Local APIC address 0x%08x\n", madt->address); 140 } 141 142 default_acpi_madt_oem_check(madt->header.oem_id, 143 madt->header.oem_table_id); 144 145 return 0; 146 } 147 148 /** 149 * acpi_register_lapic - register a local apic and generates a logic cpu number 150 * @id: local apic id to register 151 * @acpiid: ACPI id to register 152 * @enabled: this cpu is enabled or not 153 * 154 * Returns the logic cpu number which maps to the local apic 155 */ 156 static int acpi_register_lapic(int id, u32 acpiid, u8 enabled) 157 { 158 unsigned int ver = 0; 159 int cpu; 160 161 if (id >= MAX_LOCAL_APIC) { 162 pr_info("skipped apicid that is too big\n"); 163 return -EINVAL; 164 } 165 166 if (!enabled) { 167 ++disabled_cpus; 168 return -EINVAL; 169 } 170 171 if (boot_cpu_physical_apicid != -1U) 172 ver = boot_cpu_apic_version; 173 174 cpu = generic_processor_info(id, ver); 175 if (cpu >= 0) 176 early_per_cpu(x86_cpu_to_acpiid, cpu) = acpiid; 177 178 return cpu; 179 } 180 181 static int __init 182 acpi_parse_x2apic(union acpi_subtable_headers *header, const unsigned long end) 183 { 184 struct acpi_madt_local_x2apic *processor = NULL; 185 #ifdef CONFIG_X86_X2APIC 186 u32 apic_id; 187 u8 enabled; 188 #endif 189 190 processor = (struct acpi_madt_local_x2apic *)header; 191 192 if (BAD_MADT_ENTRY(processor, end)) 193 return -EINVAL; 194 195 acpi_table_print_madt_entry(&header->common); 196 197 #ifdef CONFIG_X86_X2APIC 198 apic_id = processor->local_apic_id; 199 enabled = processor->lapic_flags & ACPI_MADT_ENABLED; 200 201 /* Ignore invalid ID */ 202 if (apic_id == 0xffffffff) 203 return 0; 204 205 /* 206 * We need to register disabled CPU as well to permit 207 * counting disabled CPUs. This allows us to size 208 * cpus_possible_map more accurately, to permit 209 * to not preallocating memory for all NR_CPUS 210 * when we use CPU hotplug. 211 */ 212 if (!apic->apic_id_valid(apic_id)) { 213 if (enabled) 214 pr_warn("x2apic entry ignored\n"); 215 return 0; 216 } 217 218 acpi_register_lapic(apic_id, processor->uid, enabled); 219 #else 220 pr_warn("x2apic entry ignored\n"); 221 #endif 222 223 return 0; 224 } 225 226 static int __init 227 acpi_parse_lapic(union acpi_subtable_headers * header, const unsigned long end) 228 { 229 struct acpi_madt_local_apic *processor = NULL; 230 231 processor = (struct acpi_madt_local_apic *)header; 232 233 if (BAD_MADT_ENTRY(processor, end)) 234 return -EINVAL; 235 236 acpi_table_print_madt_entry(&header->common); 237 238 /* Ignore invalid ID */ 239 if (processor->id == 0xff) 240 return 0; 241 242 /* 243 * We need to register disabled CPU as well to permit 244 * counting disabled CPUs. This allows us to size 245 * cpus_possible_map more accurately, to permit 246 * to not preallocating memory for all NR_CPUS 247 * when we use CPU hotplug. 248 */ 249 acpi_register_lapic(processor->id, /* APIC ID */ 250 processor->processor_id, /* ACPI ID */ 251 processor->lapic_flags & ACPI_MADT_ENABLED); 252 253 return 0; 254 } 255 256 static int __init 257 acpi_parse_sapic(union acpi_subtable_headers *header, const unsigned long end) 258 { 259 struct acpi_madt_local_sapic *processor = NULL; 260 261 processor = (struct acpi_madt_local_sapic *)header; 262 263 if (BAD_MADT_ENTRY(processor, end)) 264 return -EINVAL; 265 266 acpi_table_print_madt_entry(&header->common); 267 268 acpi_register_lapic((processor->id << 8) | processor->eid,/* APIC ID */ 269 processor->processor_id, /* ACPI ID */ 270 processor->lapic_flags & ACPI_MADT_ENABLED); 271 272 return 0; 273 } 274 275 static int __init 276 acpi_parse_lapic_addr_ovr(union acpi_subtable_headers * header, 277 const unsigned long end) 278 { 279 struct acpi_madt_local_apic_override *lapic_addr_ovr = NULL; 280 281 lapic_addr_ovr = (struct acpi_madt_local_apic_override *)header; 282 283 if (BAD_MADT_ENTRY(lapic_addr_ovr, end)) 284 return -EINVAL; 285 286 acpi_table_print_madt_entry(&header->common); 287 288 acpi_lapic_addr = lapic_addr_ovr->address; 289 290 return 0; 291 } 292 293 static int __init 294 acpi_parse_x2apic_nmi(union acpi_subtable_headers *header, 295 const unsigned long end) 296 { 297 struct acpi_madt_local_x2apic_nmi *x2apic_nmi = NULL; 298 299 x2apic_nmi = (struct acpi_madt_local_x2apic_nmi *)header; 300 301 if (BAD_MADT_ENTRY(x2apic_nmi, end)) 302 return -EINVAL; 303 304 acpi_table_print_madt_entry(&header->common); 305 306 if (x2apic_nmi->lint != 1) 307 pr_warn("NMI not connected to LINT 1!\n"); 308 309 return 0; 310 } 311 312 static int __init 313 acpi_parse_lapic_nmi(union acpi_subtable_headers * header, const unsigned long end) 314 { 315 struct acpi_madt_local_apic_nmi *lapic_nmi = NULL; 316 317 lapic_nmi = (struct acpi_madt_local_apic_nmi *)header; 318 319 if (BAD_MADT_ENTRY(lapic_nmi, end)) 320 return -EINVAL; 321 322 acpi_table_print_madt_entry(&header->common); 323 324 if (lapic_nmi->lint != 1) 325 pr_warn("NMI not connected to LINT 1!\n"); 326 327 return 0; 328 } 329 330 #endif /*CONFIG_X86_LOCAL_APIC */ 331 332 #ifdef CONFIG_X86_IO_APIC 333 #define MP_ISA_BUS 0 334 335 static int __init mp_register_ioapic_irq(u8 bus_irq, u8 polarity, 336 u8 trigger, u32 gsi); 337 338 static void __init mp_override_legacy_irq(u8 bus_irq, u8 polarity, u8 trigger, 339 u32 gsi) 340 { 341 /* 342 * Check bus_irq boundary. 343 */ 344 if (bus_irq >= NR_IRQS_LEGACY) { 345 pr_warn("Invalid bus_irq %u for legacy override\n", bus_irq); 346 return; 347 } 348 349 /* 350 * TBD: This check is for faulty timer entries, where the override 351 * erroneously sets the trigger to level, resulting in a HUGE 352 * increase of timer interrupts! 353 */ 354 if ((bus_irq == 0) && (trigger == 3)) 355 trigger = 1; 356 357 if (mp_register_ioapic_irq(bus_irq, polarity, trigger, gsi) < 0) 358 return; 359 /* 360 * Reset default identity mapping if gsi is also an legacy IRQ, 361 * otherwise there will be more than one entry with the same GSI 362 * and acpi_isa_irq_to_gsi() may give wrong result. 363 */ 364 if (gsi < nr_legacy_irqs() && isa_irq_to_gsi[gsi] == gsi) 365 isa_irq_to_gsi[gsi] = INVALID_ACPI_IRQ; 366 isa_irq_to_gsi[bus_irq] = gsi; 367 } 368 369 static int mp_config_acpi_gsi(struct device *dev, u32 gsi, int trigger, 370 int polarity) 371 { 372 #ifdef CONFIG_X86_MPPARSE 373 struct mpc_intsrc mp_irq; 374 struct pci_dev *pdev; 375 unsigned char number; 376 unsigned int devfn; 377 int ioapic; 378 u8 pin; 379 380 if (!acpi_ioapic) 381 return 0; 382 if (!dev || !dev_is_pci(dev)) 383 return 0; 384 385 pdev = to_pci_dev(dev); 386 number = pdev->bus->number; 387 devfn = pdev->devfn; 388 pin = pdev->pin; 389 /* print the entry should happen on mptable identically */ 390 mp_irq.type = MP_INTSRC; 391 mp_irq.irqtype = mp_INT; 392 mp_irq.irqflag = (trigger == ACPI_EDGE_SENSITIVE ? 4 : 0x0c) | 393 (polarity == ACPI_ACTIVE_HIGH ? 1 : 3); 394 mp_irq.srcbus = number; 395 mp_irq.srcbusirq = (((devfn >> 3) & 0x1f) << 2) | ((pin - 1) & 3); 396 ioapic = mp_find_ioapic(gsi); 397 mp_irq.dstapic = mpc_ioapic_id(ioapic); 398 mp_irq.dstirq = mp_find_ioapic_pin(ioapic, gsi); 399 400 mp_save_irq(&mp_irq); 401 #endif 402 return 0; 403 } 404 405 static int __init mp_register_ioapic_irq(u8 bus_irq, u8 polarity, 406 u8 trigger, u32 gsi) 407 { 408 struct mpc_intsrc mp_irq; 409 int ioapic, pin; 410 411 /* Convert 'gsi' to 'ioapic.pin'(INTIN#) */ 412 ioapic = mp_find_ioapic(gsi); 413 if (ioapic < 0) { 414 pr_warn("Failed to find ioapic for gsi : %u\n", gsi); 415 return ioapic; 416 } 417 418 pin = mp_find_ioapic_pin(ioapic, gsi); 419 420 mp_irq.type = MP_INTSRC; 421 mp_irq.irqtype = mp_INT; 422 mp_irq.irqflag = (trigger << 2) | polarity; 423 mp_irq.srcbus = MP_ISA_BUS; 424 mp_irq.srcbusirq = bus_irq; 425 mp_irq.dstapic = mpc_ioapic_id(ioapic); 426 mp_irq.dstirq = pin; 427 428 mp_save_irq(&mp_irq); 429 430 return 0; 431 } 432 433 static int __init 434 acpi_parse_ioapic(union acpi_subtable_headers * header, const unsigned long end) 435 { 436 struct acpi_madt_io_apic *ioapic = NULL; 437 struct ioapic_domain_cfg cfg = { 438 .type = IOAPIC_DOMAIN_DYNAMIC, 439 .ops = &mp_ioapic_irqdomain_ops, 440 }; 441 442 ioapic = (struct acpi_madt_io_apic *)header; 443 444 if (BAD_MADT_ENTRY(ioapic, end)) 445 return -EINVAL; 446 447 acpi_table_print_madt_entry(&header->common); 448 449 /* Statically assign IRQ numbers for IOAPICs hosting legacy IRQs */ 450 if (ioapic->global_irq_base < nr_legacy_irqs()) 451 cfg.type = IOAPIC_DOMAIN_LEGACY; 452 453 mp_register_ioapic(ioapic->id, ioapic->address, ioapic->global_irq_base, 454 &cfg); 455 456 return 0; 457 } 458 459 /* 460 * Parse Interrupt Source Override for the ACPI SCI 461 */ 462 static void __init acpi_sci_ioapic_setup(u8 bus_irq, u16 polarity, u16 trigger, u32 gsi) 463 { 464 if (trigger == 0) /* compatible SCI trigger is level */ 465 trigger = 3; 466 467 if (polarity == 0) /* compatible SCI polarity is low */ 468 polarity = 3; 469 470 /* Command-line over-ride via acpi_sci= */ 471 if (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) 472 trigger = (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2; 473 474 if (acpi_sci_flags & ACPI_MADT_POLARITY_MASK) 475 polarity = acpi_sci_flags & ACPI_MADT_POLARITY_MASK; 476 477 if (bus_irq < NR_IRQS_LEGACY) 478 mp_override_legacy_irq(bus_irq, polarity, trigger, gsi); 479 else 480 mp_register_ioapic_irq(bus_irq, polarity, trigger, gsi); 481 482 acpi_penalize_sci_irq(bus_irq, trigger, polarity); 483 484 /* 485 * stash over-ride to indicate we've been here 486 * and for later update of acpi_gbl_FADT 487 */ 488 acpi_sci_override_gsi = gsi; 489 return; 490 } 491 492 static int __init 493 acpi_parse_int_src_ovr(union acpi_subtable_headers * header, 494 const unsigned long end) 495 { 496 struct acpi_madt_interrupt_override *intsrc = NULL; 497 498 intsrc = (struct acpi_madt_interrupt_override *)header; 499 500 if (BAD_MADT_ENTRY(intsrc, end)) 501 return -EINVAL; 502 503 acpi_table_print_madt_entry(&header->common); 504 505 if (intsrc->source_irq == acpi_gbl_FADT.sci_interrupt) { 506 acpi_sci_ioapic_setup(intsrc->source_irq, 507 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK, 508 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2, 509 intsrc->global_irq); 510 return 0; 511 } 512 513 if (intsrc->source_irq == 0) { 514 if (acpi_skip_timer_override) { 515 pr_warn("BIOS IRQ0 override ignored.\n"); 516 return 0; 517 } 518 519 if ((intsrc->global_irq == 2) && acpi_fix_pin2_polarity 520 && (intsrc->inti_flags & ACPI_MADT_POLARITY_MASK)) { 521 intsrc->inti_flags &= ~ACPI_MADT_POLARITY_MASK; 522 pr_warn("BIOS IRQ0 pin2 override: forcing polarity to high active.\n"); 523 } 524 } 525 526 mp_override_legacy_irq(intsrc->source_irq, 527 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK, 528 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2, 529 intsrc->global_irq); 530 531 return 0; 532 } 533 534 static int __init 535 acpi_parse_nmi_src(union acpi_subtable_headers * header, const unsigned long end) 536 { 537 struct acpi_madt_nmi_source *nmi_src = NULL; 538 539 nmi_src = (struct acpi_madt_nmi_source *)header; 540 541 if (BAD_MADT_ENTRY(nmi_src, end)) 542 return -EINVAL; 543 544 acpi_table_print_madt_entry(&header->common); 545 546 /* TBD: Support nimsrc entries? */ 547 548 return 0; 549 } 550 551 #endif /* CONFIG_X86_IO_APIC */ 552 553 /* 554 * acpi_pic_sci_set_trigger() 555 * 556 * use ELCR to set PIC-mode trigger type for SCI 557 * 558 * If a PIC-mode SCI is not recognized or gives spurious IRQ7's 559 * it may require Edge Trigger -- use "acpi_sci=edge" 560 * 561 * Port 0x4d0-4d1 are ECLR1 and ECLR2, the Edge/Level Control Registers 562 * for the 8259 PIC. bit[n] = 1 means irq[n] is Level, otherwise Edge. 563 * ECLR1 is IRQs 0-7 (IRQ 0, 1, 2 must be 0) 564 * ECLR2 is IRQs 8-15 (IRQ 8, 13 must be 0) 565 */ 566 567 void __init acpi_pic_sci_set_trigger(unsigned int irq, u16 trigger) 568 { 569 unsigned int mask = 1 << irq; 570 unsigned int old, new; 571 572 /* Real old ELCR mask */ 573 old = inb(0x4d0) | (inb(0x4d1) << 8); 574 575 /* 576 * If we use ACPI to set PCI IRQs, then we should clear ELCR 577 * since we will set it correctly as we enable the PCI irq 578 * routing. 579 */ 580 new = acpi_noirq ? old : 0; 581 582 /* 583 * Update SCI information in the ELCR, it isn't in the PCI 584 * routing tables.. 585 */ 586 switch (trigger) { 587 case 1: /* Edge - clear */ 588 new &= ~mask; 589 break; 590 case 3: /* Level - set */ 591 new |= mask; 592 break; 593 } 594 595 if (old == new) 596 return; 597 598 pr_warn("setting ELCR to %04x (from %04x)\n", new, old); 599 outb(new, 0x4d0); 600 outb(new >> 8, 0x4d1); 601 } 602 603 int acpi_gsi_to_irq(u32 gsi, unsigned int *irqp) 604 { 605 int rc, irq, trigger, polarity; 606 607 if (acpi_irq_model == ACPI_IRQ_MODEL_PIC) { 608 *irqp = gsi; 609 return 0; 610 } 611 612 rc = acpi_get_override_irq(gsi, &trigger, &polarity); 613 if (rc) 614 return rc; 615 616 trigger = trigger ? ACPI_LEVEL_SENSITIVE : ACPI_EDGE_SENSITIVE; 617 polarity = polarity ? ACPI_ACTIVE_LOW : ACPI_ACTIVE_HIGH; 618 irq = acpi_register_gsi(NULL, gsi, trigger, polarity); 619 if (irq < 0) 620 return irq; 621 622 *irqp = irq; 623 return 0; 624 } 625 EXPORT_SYMBOL_GPL(acpi_gsi_to_irq); 626 627 int acpi_isa_irq_to_gsi(unsigned isa_irq, u32 *gsi) 628 { 629 if (isa_irq < nr_legacy_irqs() && 630 isa_irq_to_gsi[isa_irq] != INVALID_ACPI_IRQ) { 631 *gsi = isa_irq_to_gsi[isa_irq]; 632 return 0; 633 } 634 635 return -1; 636 } 637 638 static int acpi_register_gsi_pic(struct device *dev, u32 gsi, 639 int trigger, int polarity) 640 { 641 #ifdef CONFIG_PCI 642 /* 643 * Make sure all (legacy) PCI IRQs are set as level-triggered. 644 */ 645 if (trigger == ACPI_LEVEL_SENSITIVE) 646 elcr_set_level_irq(gsi); 647 #endif 648 649 return gsi; 650 } 651 652 #ifdef CONFIG_X86_LOCAL_APIC 653 static int acpi_register_gsi_ioapic(struct device *dev, u32 gsi, 654 int trigger, int polarity) 655 { 656 int irq = gsi; 657 #ifdef CONFIG_X86_IO_APIC 658 int node; 659 struct irq_alloc_info info; 660 661 node = dev ? dev_to_node(dev) : NUMA_NO_NODE; 662 trigger = trigger == ACPI_EDGE_SENSITIVE ? 0 : 1; 663 polarity = polarity == ACPI_ACTIVE_HIGH ? 0 : 1; 664 ioapic_set_alloc_attr(&info, node, trigger, polarity); 665 666 mutex_lock(&acpi_ioapic_lock); 667 irq = mp_map_gsi_to_irq(gsi, IOAPIC_MAP_ALLOC, &info); 668 /* Don't set up the ACPI SCI because it's already set up */ 669 if (irq >= 0 && enable_update_mptable && gsi != acpi_gbl_FADT.sci_interrupt) 670 mp_config_acpi_gsi(dev, gsi, trigger, polarity); 671 mutex_unlock(&acpi_ioapic_lock); 672 #endif 673 674 return irq; 675 } 676 677 static void acpi_unregister_gsi_ioapic(u32 gsi) 678 { 679 #ifdef CONFIG_X86_IO_APIC 680 int irq; 681 682 mutex_lock(&acpi_ioapic_lock); 683 irq = mp_map_gsi_to_irq(gsi, 0, NULL); 684 if (irq > 0) 685 mp_unmap_irq(irq); 686 mutex_unlock(&acpi_ioapic_lock); 687 #endif 688 } 689 #endif 690 691 int (*__acpi_register_gsi)(struct device *dev, u32 gsi, 692 int trigger, int polarity) = acpi_register_gsi_pic; 693 void (*__acpi_unregister_gsi)(u32 gsi) = NULL; 694 695 #ifdef CONFIG_ACPI_SLEEP 696 int (*acpi_suspend_lowlevel)(void) = x86_acpi_suspend_lowlevel; 697 #else 698 int (*acpi_suspend_lowlevel)(void); 699 #endif 700 701 /* 702 * success: return IRQ number (>=0) 703 * failure: return < 0 704 */ 705 int acpi_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity) 706 { 707 return __acpi_register_gsi(dev, gsi, trigger, polarity); 708 } 709 EXPORT_SYMBOL_GPL(acpi_register_gsi); 710 711 void acpi_unregister_gsi(u32 gsi) 712 { 713 if (__acpi_unregister_gsi) 714 __acpi_unregister_gsi(gsi); 715 } 716 EXPORT_SYMBOL_GPL(acpi_unregister_gsi); 717 718 #ifdef CONFIG_X86_LOCAL_APIC 719 static void __init acpi_set_irq_model_ioapic(void) 720 { 721 acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC; 722 __acpi_register_gsi = acpi_register_gsi_ioapic; 723 __acpi_unregister_gsi = acpi_unregister_gsi_ioapic; 724 acpi_ioapic = 1; 725 } 726 #endif 727 728 /* 729 * ACPI based hotplug support for CPU 730 */ 731 #ifdef CONFIG_ACPI_HOTPLUG_CPU 732 #include <acpi/processor.h> 733 734 static int acpi_map_cpu2node(acpi_handle handle, int cpu, int physid) 735 { 736 #ifdef CONFIG_ACPI_NUMA 737 int nid; 738 739 nid = acpi_get_node(handle); 740 if (nid != NUMA_NO_NODE) { 741 set_apicid_to_node(physid, nid); 742 numa_set_node(cpu, nid); 743 } 744 #endif 745 return 0; 746 } 747 748 int acpi_map_cpu(acpi_handle handle, phys_cpuid_t physid, u32 acpi_id, 749 int *pcpu) 750 { 751 int cpu; 752 753 cpu = acpi_register_lapic(physid, acpi_id, ACPI_MADT_ENABLED); 754 if (cpu < 0) { 755 pr_info("Unable to map lapic to logical cpu number\n"); 756 return cpu; 757 } 758 759 acpi_processor_set_pdc(handle); 760 acpi_map_cpu2node(handle, cpu, physid); 761 762 *pcpu = cpu; 763 return 0; 764 } 765 EXPORT_SYMBOL(acpi_map_cpu); 766 767 int acpi_unmap_cpu(int cpu) 768 { 769 #ifdef CONFIG_ACPI_NUMA 770 set_apicid_to_node(per_cpu(x86_cpu_to_apicid, cpu), NUMA_NO_NODE); 771 #endif 772 773 per_cpu(x86_cpu_to_apicid, cpu) = -1; 774 set_cpu_present(cpu, false); 775 num_processors--; 776 777 return (0); 778 } 779 EXPORT_SYMBOL(acpi_unmap_cpu); 780 #endif /* CONFIG_ACPI_HOTPLUG_CPU */ 781 782 int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base) 783 { 784 int ret = -ENOSYS; 785 #ifdef CONFIG_ACPI_HOTPLUG_IOAPIC 786 int ioapic_id; 787 u64 addr; 788 struct ioapic_domain_cfg cfg = { 789 .type = IOAPIC_DOMAIN_DYNAMIC, 790 .ops = &mp_ioapic_irqdomain_ops, 791 }; 792 793 ioapic_id = acpi_get_ioapic_id(handle, gsi_base, &addr); 794 if (ioapic_id < 0) { 795 unsigned long long uid; 796 acpi_status status; 797 798 status = acpi_evaluate_integer(handle, METHOD_NAME__UID, 799 NULL, &uid); 800 if (ACPI_FAILURE(status)) { 801 acpi_handle_warn(handle, "failed to get IOAPIC ID.\n"); 802 return -EINVAL; 803 } 804 ioapic_id = (int)uid; 805 } 806 807 mutex_lock(&acpi_ioapic_lock); 808 ret = mp_register_ioapic(ioapic_id, phys_addr, gsi_base, &cfg); 809 mutex_unlock(&acpi_ioapic_lock); 810 #endif 811 812 return ret; 813 } 814 EXPORT_SYMBOL(acpi_register_ioapic); 815 816 int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base) 817 { 818 int ret = -ENOSYS; 819 820 #ifdef CONFIG_ACPI_HOTPLUG_IOAPIC 821 mutex_lock(&acpi_ioapic_lock); 822 ret = mp_unregister_ioapic(gsi_base); 823 mutex_unlock(&acpi_ioapic_lock); 824 #endif 825 826 return ret; 827 } 828 EXPORT_SYMBOL(acpi_unregister_ioapic); 829 830 /** 831 * acpi_ioapic_registered - Check whether IOAPIC associated with @gsi_base 832 * has been registered 833 * @handle: ACPI handle of the IOAPIC device 834 * @gsi_base: GSI base associated with the IOAPIC 835 * 836 * Assume caller holds some type of lock to serialize acpi_ioapic_registered() 837 * with acpi_register_ioapic()/acpi_unregister_ioapic(). 838 */ 839 int acpi_ioapic_registered(acpi_handle handle, u32 gsi_base) 840 { 841 int ret = 0; 842 843 #ifdef CONFIG_ACPI_HOTPLUG_IOAPIC 844 mutex_lock(&acpi_ioapic_lock); 845 ret = mp_ioapic_registered(gsi_base); 846 mutex_unlock(&acpi_ioapic_lock); 847 #endif 848 849 return ret; 850 } 851 852 static int __init acpi_parse_sbf(struct acpi_table_header *table) 853 { 854 struct acpi_table_boot *sb = (struct acpi_table_boot *)table; 855 856 sbf_port = sb->cmos_index; /* Save CMOS port */ 857 858 return 0; 859 } 860 861 #ifdef CONFIG_HPET_TIMER 862 #include <asm/hpet.h> 863 864 static struct resource *hpet_res __initdata; 865 866 static int __init acpi_parse_hpet(struct acpi_table_header *table) 867 { 868 struct acpi_table_hpet *hpet_tbl = (struct acpi_table_hpet *)table; 869 870 if (hpet_tbl->address.space_id != ACPI_SPACE_MEM) { 871 pr_warn("HPET timers must be located in memory.\n"); 872 return -1; 873 } 874 875 hpet_address = hpet_tbl->address.address; 876 hpet_blockid = hpet_tbl->sequence; 877 878 /* 879 * Some broken BIOSes advertise HPET at 0x0. We really do not 880 * want to allocate a resource there. 881 */ 882 if (!hpet_address) { 883 pr_warn("HPET id: %#x base: %#lx is invalid\n", hpet_tbl->id, hpet_address); 884 return 0; 885 } 886 #ifdef CONFIG_X86_64 887 /* 888 * Some even more broken BIOSes advertise HPET at 889 * 0xfed0000000000000 instead of 0xfed00000. Fix it up and add 890 * some noise: 891 */ 892 if (hpet_address == 0xfed0000000000000UL) { 893 if (!hpet_force_user) { 894 pr_warn("HPET id: %#x base: 0xfed0000000000000 is bogus, try hpet=force on the kernel command line to fix it up to 0xfed00000.\n", 895 hpet_tbl->id); 896 hpet_address = 0; 897 return 0; 898 } 899 pr_warn("HPET id: %#x base: 0xfed0000000000000 fixed up to 0xfed00000.\n", 900 hpet_tbl->id); 901 hpet_address >>= 32; 902 } 903 #endif 904 pr_info("HPET id: %#x base: %#lx\n", hpet_tbl->id, hpet_address); 905 906 /* 907 * Allocate and initialize the HPET firmware resource for adding into 908 * the resource tree during the lateinit timeframe. 909 */ 910 #define HPET_RESOURCE_NAME_SIZE 9 911 hpet_res = memblock_alloc(sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE, 912 SMP_CACHE_BYTES); 913 if (!hpet_res) 914 panic("%s: Failed to allocate %zu bytes\n", __func__, 915 sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE); 916 917 hpet_res->name = (void *)&hpet_res[1]; 918 hpet_res->flags = IORESOURCE_MEM; 919 snprintf((char *)hpet_res->name, HPET_RESOURCE_NAME_SIZE, "HPET %u", 920 hpet_tbl->sequence); 921 922 hpet_res->start = hpet_address; 923 hpet_res->end = hpet_address + (1 * 1024) - 1; 924 925 return 0; 926 } 927 928 /* 929 * hpet_insert_resource inserts the HPET resources used into the resource 930 * tree. 931 */ 932 static __init int hpet_insert_resource(void) 933 { 934 if (!hpet_res) 935 return 1; 936 937 return insert_resource(&iomem_resource, hpet_res); 938 } 939 940 late_initcall(hpet_insert_resource); 941 942 #else 943 #define acpi_parse_hpet NULL 944 #endif 945 946 static int __init acpi_parse_fadt(struct acpi_table_header *table) 947 { 948 if (!(acpi_gbl_FADT.boot_flags & ACPI_FADT_LEGACY_DEVICES)) { 949 pr_debug("no legacy devices present\n"); 950 x86_platform.legacy.devices.pnpbios = 0; 951 } 952 953 if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID && 954 !(acpi_gbl_FADT.boot_flags & ACPI_FADT_8042) && 955 x86_platform.legacy.i8042 != X86_LEGACY_I8042_PLATFORM_ABSENT) { 956 pr_debug("i8042 controller is absent\n"); 957 x86_platform.legacy.i8042 = X86_LEGACY_I8042_FIRMWARE_ABSENT; 958 } 959 960 if (acpi_gbl_FADT.boot_flags & ACPI_FADT_NO_CMOS_RTC) { 961 pr_debug("not registering RTC platform device\n"); 962 x86_platform.legacy.rtc = 0; 963 } 964 965 if (acpi_gbl_FADT.boot_flags & ACPI_FADT_NO_VGA) { 966 pr_debug("probing for VGA not safe\n"); 967 x86_platform.legacy.no_vga = 1; 968 } 969 970 #ifdef CONFIG_X86_PM_TIMER 971 /* detect the location of the ACPI PM Timer */ 972 if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID) { 973 /* FADT rev. 2 */ 974 if (acpi_gbl_FADT.xpm_timer_block.space_id != 975 ACPI_ADR_SPACE_SYSTEM_IO) 976 return 0; 977 978 pmtmr_ioport = acpi_gbl_FADT.xpm_timer_block.address; 979 /* 980 * "X" fields are optional extensions to the original V1.0 981 * fields, so we must selectively expand V1.0 fields if the 982 * corresponding X field is zero. 983 */ 984 if (!pmtmr_ioport) 985 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block; 986 } else { 987 /* FADT rev. 1 */ 988 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block; 989 } 990 if (pmtmr_ioport) 991 pr_info("PM-Timer IO Port: %#x\n", 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 pr_err("Error parsing LAPIC address override entry\n"); 1018 return count; 1019 } 1020 1021 register_lapic_address(acpi_lapic_addr); 1022 1023 return count; 1024 } 1025 1026 static int __init acpi_parse_madt_lapic_entries(void) 1027 { 1028 int count; 1029 int x2count = 0; 1030 int ret; 1031 struct acpi_subtable_proc madt_proc[2]; 1032 1033 if (!boot_cpu_has(X86_FEATURE_APIC)) 1034 return -ENODEV; 1035 1036 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC, 1037 acpi_parse_sapic, MAX_LOCAL_APIC); 1038 1039 if (!count) { 1040 memset(madt_proc, 0, sizeof(madt_proc)); 1041 madt_proc[0].id = ACPI_MADT_TYPE_LOCAL_APIC; 1042 madt_proc[0].handler = acpi_parse_lapic; 1043 madt_proc[1].id = ACPI_MADT_TYPE_LOCAL_X2APIC; 1044 madt_proc[1].handler = acpi_parse_x2apic; 1045 ret = acpi_table_parse_entries_array(ACPI_SIG_MADT, 1046 sizeof(struct acpi_table_madt), 1047 madt_proc, ARRAY_SIZE(madt_proc), MAX_LOCAL_APIC); 1048 if (ret < 0) { 1049 pr_err("Error parsing LAPIC/X2APIC entries\n"); 1050 return ret; 1051 } 1052 1053 count = madt_proc[0].count; 1054 x2count = madt_proc[1].count; 1055 } 1056 if (!count && !x2count) { 1057 pr_err("No LAPIC entries present\n"); 1058 /* TBD: Cleanup to allow fallback to MPS */ 1059 return -ENODEV; 1060 } else if (count < 0 || x2count < 0) { 1061 pr_err("Error parsing LAPIC entry\n"); 1062 /* TBD: Cleanup to allow fallback to MPS */ 1063 return count; 1064 } 1065 1066 x2count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC_NMI, 1067 acpi_parse_x2apic_nmi, 0); 1068 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI, 1069 acpi_parse_lapic_nmi, 0); 1070 if (count < 0 || x2count < 0) { 1071 pr_err("Error parsing LAPIC NMI entry\n"); 1072 /* TBD: Cleanup to allow fallback to MPS */ 1073 return count; 1074 } 1075 return 0; 1076 } 1077 #endif /* CONFIG_X86_LOCAL_APIC */ 1078 1079 #ifdef CONFIG_X86_IO_APIC 1080 static void __init mp_config_acpi_legacy_irqs(void) 1081 { 1082 int i; 1083 struct mpc_intsrc mp_irq; 1084 1085 #ifdef CONFIG_EISA 1086 /* 1087 * Fabricate the legacy ISA bus (bus #31). 1088 */ 1089 mp_bus_id_to_type[MP_ISA_BUS] = MP_BUS_ISA; 1090 #endif 1091 set_bit(MP_ISA_BUS, mp_bus_not_pci); 1092 pr_debug("Bus #%d is ISA (nIRQs: %d)\n", MP_ISA_BUS, nr_legacy_irqs()); 1093 1094 /* 1095 * Use the default configuration for the IRQs 0-15. Unless 1096 * overridden by (MADT) interrupt source override entries. 1097 */ 1098 for (i = 0; i < nr_legacy_irqs(); i++) { 1099 int ioapic, pin; 1100 unsigned int dstapic; 1101 int idx; 1102 u32 gsi; 1103 1104 /* Locate the gsi that irq i maps to. */ 1105 if (acpi_isa_irq_to_gsi(i, &gsi)) 1106 continue; 1107 1108 /* 1109 * Locate the IOAPIC that manages the ISA IRQ. 1110 */ 1111 ioapic = mp_find_ioapic(gsi); 1112 if (ioapic < 0) 1113 continue; 1114 pin = mp_find_ioapic_pin(ioapic, gsi); 1115 dstapic = mpc_ioapic_id(ioapic); 1116 1117 for (idx = 0; idx < mp_irq_entries; idx++) { 1118 struct mpc_intsrc *irq = mp_irqs + idx; 1119 1120 /* Do we already have a mapping for this ISA IRQ? */ 1121 if (irq->srcbus == MP_ISA_BUS && irq->srcbusirq == i) 1122 break; 1123 1124 /* Do we already have a mapping for this IOAPIC pin */ 1125 if (irq->dstapic == dstapic && irq->dstirq == pin) 1126 break; 1127 } 1128 1129 if (idx != mp_irq_entries) { 1130 pr_debug("ACPI: IRQ%d used by override.\n", i); 1131 continue; /* IRQ already used */ 1132 } 1133 1134 mp_irq.type = MP_INTSRC; 1135 mp_irq.irqflag = 0; /* Conforming */ 1136 mp_irq.srcbus = MP_ISA_BUS; 1137 mp_irq.dstapic = dstapic; 1138 mp_irq.irqtype = mp_INT; 1139 mp_irq.srcbusirq = i; /* Identity mapped */ 1140 mp_irq.dstirq = pin; 1141 1142 mp_save_irq(&mp_irq); 1143 } 1144 } 1145 1146 /* 1147 * Parse IOAPIC related entries in MADT 1148 * returns 0 on success, < 0 on error 1149 */ 1150 static int __init acpi_parse_madt_ioapic_entries(void) 1151 { 1152 int count; 1153 1154 /* 1155 * ACPI interpreter is required to complete interrupt setup, 1156 * so if it is off, don't enumerate the io-apics with ACPI. 1157 * If MPS is present, it will handle them, 1158 * otherwise the system will stay in PIC mode 1159 */ 1160 if (acpi_disabled || acpi_noirq) 1161 return -ENODEV; 1162 1163 if (!boot_cpu_has(X86_FEATURE_APIC)) 1164 return -ENODEV; 1165 1166 /* 1167 * if "noapic" boot option, don't look for IO-APICs 1168 */ 1169 if (skip_ioapic_setup) { 1170 pr_info("Skipping IOAPIC probe due to 'noapic' option.\n"); 1171 return -ENODEV; 1172 } 1173 1174 count = acpi_table_parse_madt(ACPI_MADT_TYPE_IO_APIC, acpi_parse_ioapic, 1175 MAX_IO_APICS); 1176 if (!count) { 1177 pr_err("No IOAPIC entries present\n"); 1178 return -ENODEV; 1179 } else if (count < 0) { 1180 pr_err("Error parsing IOAPIC entry\n"); 1181 return count; 1182 } 1183 1184 count = acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE, 1185 acpi_parse_int_src_ovr, nr_irqs); 1186 if (count < 0) { 1187 pr_err("Error parsing interrupt source overrides entry\n"); 1188 /* TBD: Cleanup to allow fallback to MPS */ 1189 return count; 1190 } 1191 1192 /* 1193 * If BIOS did not supply an INT_SRC_OVR for the SCI 1194 * pretend we got one so we can set the SCI flags. 1195 * But ignore setting up SCI on hardware reduced platforms. 1196 */ 1197 if (acpi_sci_override_gsi == INVALID_ACPI_IRQ && !acpi_gbl_reduced_hardware) 1198 acpi_sci_ioapic_setup(acpi_gbl_FADT.sci_interrupt, 0, 0, 1199 acpi_gbl_FADT.sci_interrupt); 1200 1201 /* Fill in identity legacy mappings where no override */ 1202 mp_config_acpi_legacy_irqs(); 1203 1204 count = acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE, 1205 acpi_parse_nmi_src, nr_irqs); 1206 if (count < 0) { 1207 pr_err("Error parsing NMI SRC entry\n"); 1208 /* TBD: Cleanup to allow fallback to MPS */ 1209 return count; 1210 } 1211 1212 return 0; 1213 } 1214 #else 1215 static inline int acpi_parse_madt_ioapic_entries(void) 1216 { 1217 return -1; 1218 } 1219 #endif /* !CONFIG_X86_IO_APIC */ 1220 1221 static void __init early_acpi_process_madt(void) 1222 { 1223 #ifdef CONFIG_X86_LOCAL_APIC 1224 int error; 1225 1226 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) { 1227 1228 /* 1229 * Parse MADT LAPIC entries 1230 */ 1231 error = early_acpi_parse_madt_lapic_addr_ovr(); 1232 if (!error) { 1233 acpi_lapic = 1; 1234 smp_found_config = 1; 1235 } 1236 if (error == -EINVAL) { 1237 /* 1238 * Dell Precision Workstation 410, 610 come here. 1239 */ 1240 pr_err("Invalid BIOS MADT, disabling ACPI\n"); 1241 disable_acpi(); 1242 } 1243 } 1244 #endif 1245 } 1246 1247 static void __init acpi_process_madt(void) 1248 { 1249 #ifdef CONFIG_X86_LOCAL_APIC 1250 int error; 1251 1252 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) { 1253 1254 /* 1255 * Parse MADT LAPIC entries 1256 */ 1257 error = acpi_parse_madt_lapic_entries(); 1258 if (!error) { 1259 acpi_lapic = 1; 1260 1261 /* 1262 * Parse MADT IO-APIC entries 1263 */ 1264 mutex_lock(&acpi_ioapic_lock); 1265 error = acpi_parse_madt_ioapic_entries(); 1266 mutex_unlock(&acpi_ioapic_lock); 1267 if (!error) { 1268 acpi_set_irq_model_ioapic(); 1269 1270 smp_found_config = 1; 1271 } 1272 } 1273 if (error == -EINVAL) { 1274 /* 1275 * Dell Precision Workstation 410, 610 come here. 1276 */ 1277 pr_err("Invalid BIOS MADT, disabling ACPI\n"); 1278 disable_acpi(); 1279 } 1280 } else { 1281 /* 1282 * ACPI found no MADT, and so ACPI wants UP PIC mode. 1283 * In the event an MPS table was found, forget it. 1284 * Boot with "acpi=off" to use MPS on such a system. 1285 */ 1286 if (smp_found_config) { 1287 pr_warn("No APIC-table, disabling MPS\n"); 1288 smp_found_config = 0; 1289 } 1290 } 1291 1292 /* 1293 * ACPI supports both logical (e.g. Hyper-Threading) and physical 1294 * processors, where MPS only supports physical. 1295 */ 1296 if (acpi_lapic && acpi_ioapic) 1297 pr_info("Using ACPI (MADT) for SMP configuration information\n"); 1298 else if (acpi_lapic) 1299 pr_info("Using ACPI for processor (LAPIC) configuration information\n"); 1300 #endif 1301 return; 1302 } 1303 1304 static int __init disable_acpi_irq(const struct dmi_system_id *d) 1305 { 1306 if (!acpi_force) { 1307 pr_notice("%s detected: force use of acpi=noirq\n", d->ident); 1308 acpi_noirq_set(); 1309 } 1310 return 0; 1311 } 1312 1313 static int __init disable_acpi_pci(const struct dmi_system_id *d) 1314 { 1315 if (!acpi_force) { 1316 pr_notice("%s detected: force use of pci=noacpi\n", d->ident); 1317 acpi_disable_pci(); 1318 } 1319 return 0; 1320 } 1321 1322 static int __init dmi_disable_acpi(const struct dmi_system_id *d) 1323 { 1324 if (!acpi_force) { 1325 pr_notice("%s detected: acpi off\n", d->ident); 1326 disable_acpi(); 1327 } else { 1328 pr_notice("Warning: DMI blacklist says broken, but acpi forced\n"); 1329 } 1330 return 0; 1331 } 1332 1333 /* 1334 * Force ignoring BIOS IRQ0 override 1335 */ 1336 static int __init dmi_ignore_irq0_timer_override(const struct dmi_system_id *d) 1337 { 1338 if (!acpi_skip_timer_override) { 1339 pr_notice("%s detected: Ignoring BIOS IRQ0 override\n", 1340 d->ident); 1341 acpi_skip_timer_override = 1; 1342 } 1343 return 0; 1344 } 1345 1346 /* 1347 * ACPI offers an alternative platform interface model that removes 1348 * ACPI hardware requirements for platforms that do not implement 1349 * the PC Architecture. 1350 * 1351 * We initialize the Hardware-reduced ACPI model here: 1352 */ 1353 void __init acpi_generic_reduced_hw_init(void) 1354 { 1355 /* 1356 * Override x86_init functions and bypass legacy PIC in 1357 * hardware reduced ACPI mode. 1358 */ 1359 x86_init.timers.timer_init = x86_init_noop; 1360 x86_init.irqs.pre_vector_init = x86_init_noop; 1361 legacy_pic = &null_legacy_pic; 1362 } 1363 1364 static void __init acpi_reduced_hw_init(void) 1365 { 1366 if (acpi_gbl_reduced_hardware) 1367 x86_init.acpi.reduced_hw_early_init(); 1368 } 1369 1370 /* 1371 * If your system is blacklisted here, but you find that acpi=force 1372 * works for you, please contact linux-acpi@vger.kernel.org 1373 */ 1374 static const struct dmi_system_id acpi_dmi_table[] __initconst = { 1375 /* 1376 * Boxes that need ACPI disabled 1377 */ 1378 { 1379 .callback = dmi_disable_acpi, 1380 .ident = "IBM Thinkpad", 1381 .matches = { 1382 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), 1383 DMI_MATCH(DMI_BOARD_NAME, "2629H1G"), 1384 }, 1385 }, 1386 1387 /* 1388 * Boxes that need ACPI PCI IRQ routing disabled 1389 */ 1390 { 1391 .callback = disable_acpi_irq, 1392 .ident = "ASUS A7V", 1393 .matches = { 1394 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC"), 1395 DMI_MATCH(DMI_BOARD_NAME, "<A7V>"), 1396 /* newer BIOS, Revision 1011, does work */ 1397 DMI_MATCH(DMI_BIOS_VERSION, 1398 "ASUS A7V ACPI BIOS Revision 1007"), 1399 }, 1400 }, 1401 { 1402 /* 1403 * Latest BIOS for IBM 600E (1.16) has bad pcinum 1404 * for LPC bridge, which is needed for the PCI 1405 * interrupt links to work. DSDT fix is in bug 5966. 1406 * 2645, 2646 model numbers are shared with 600/600E/600X 1407 */ 1408 .callback = disable_acpi_irq, 1409 .ident = "IBM Thinkpad 600 Series 2645", 1410 .matches = { 1411 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), 1412 DMI_MATCH(DMI_BOARD_NAME, "2645"), 1413 }, 1414 }, 1415 { 1416 .callback = disable_acpi_irq, 1417 .ident = "IBM Thinkpad 600 Series 2646", 1418 .matches = { 1419 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), 1420 DMI_MATCH(DMI_BOARD_NAME, "2646"), 1421 }, 1422 }, 1423 /* 1424 * Boxes that need ACPI PCI IRQ routing and PCI scan disabled 1425 */ 1426 { /* _BBN 0 bug */ 1427 .callback = disable_acpi_pci, 1428 .ident = "ASUS PR-DLS", 1429 .matches = { 1430 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."), 1431 DMI_MATCH(DMI_BOARD_NAME, "PR-DLS"), 1432 DMI_MATCH(DMI_BIOS_VERSION, 1433 "ASUS PR-DLS ACPI BIOS Revision 1010"), 1434 DMI_MATCH(DMI_BIOS_DATE, "03/21/2003") 1435 }, 1436 }, 1437 { 1438 .callback = disable_acpi_pci, 1439 .ident = "Acer TravelMate 36x Laptop", 1440 .matches = { 1441 DMI_MATCH(DMI_SYS_VENDOR, "Acer"), 1442 DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"), 1443 }, 1444 }, 1445 {} 1446 }; 1447 1448 /* second table for DMI checks that should run after early-quirks */ 1449 static const struct dmi_system_id acpi_dmi_table_late[] __initconst = { 1450 /* 1451 * HP laptops which use a DSDT reporting as HP/SB400/10000, 1452 * which includes some code which overrides all temperature 1453 * trip points to 16C if the INTIN2 input of the I/O APIC 1454 * is enabled. This input is incorrectly designated the 1455 * ISA IRQ 0 via an interrupt source override even though 1456 * it is wired to the output of the master 8259A and INTIN0 1457 * is not connected at all. Force ignoring BIOS IRQ0 1458 * override in that cases. 1459 */ 1460 { 1461 .callback = dmi_ignore_irq0_timer_override, 1462 .ident = "HP nx6115 laptop", 1463 .matches = { 1464 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 1465 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6115"), 1466 }, 1467 }, 1468 { 1469 .callback = dmi_ignore_irq0_timer_override, 1470 .ident = "HP NX6125 laptop", 1471 .matches = { 1472 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 1473 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6125"), 1474 }, 1475 }, 1476 { 1477 .callback = dmi_ignore_irq0_timer_override, 1478 .ident = "HP NX6325 laptop", 1479 .matches = { 1480 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 1481 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6325"), 1482 }, 1483 }, 1484 { 1485 .callback = dmi_ignore_irq0_timer_override, 1486 .ident = "HP 6715b laptop", 1487 .matches = { 1488 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 1489 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq 6715b"), 1490 }, 1491 }, 1492 { 1493 .callback = dmi_ignore_irq0_timer_override, 1494 .ident = "FUJITSU SIEMENS", 1495 .matches = { 1496 DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"), 1497 DMI_MATCH(DMI_PRODUCT_NAME, "AMILO PRO V2030"), 1498 }, 1499 }, 1500 {} 1501 }; 1502 1503 /* 1504 * acpi_boot_table_init() and acpi_boot_init() 1505 * called from setup_arch(), always. 1506 * 1. checksums all tables 1507 * 2. enumerates lapics 1508 * 3. enumerates io-apics 1509 * 1510 * acpi_table_init() is separate to allow reading SRAT without 1511 * other side effects. 1512 * 1513 * side effects of acpi_boot_init: 1514 * acpi_lapic = 1 if LAPIC found 1515 * acpi_ioapic = 1 if IOAPIC found 1516 * if (acpi_lapic && acpi_ioapic) smp_found_config = 1; 1517 * if acpi_blacklisted() acpi_disabled = 1; 1518 * acpi_irq_model=... 1519 * ... 1520 */ 1521 1522 void __init acpi_boot_table_init(void) 1523 { 1524 dmi_check_system(acpi_dmi_table); 1525 1526 /* 1527 * If acpi_disabled, bail out 1528 */ 1529 if (acpi_disabled) 1530 return; 1531 1532 /* 1533 * Initialize the ACPI boot-time table parser. 1534 */ 1535 if (acpi_locate_initial_tables()) 1536 disable_acpi(); 1537 else 1538 acpi_reserve_initial_tables(); 1539 } 1540 1541 int __init early_acpi_boot_init(void) 1542 { 1543 if (acpi_disabled) 1544 return 1; 1545 1546 acpi_table_init_complete(); 1547 1548 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf); 1549 1550 /* 1551 * blacklist may disable ACPI entirely 1552 */ 1553 if (acpi_blacklisted()) { 1554 if (acpi_force) { 1555 pr_warn("acpi=force override\n"); 1556 } else { 1557 pr_warn("Disabling ACPI support\n"); 1558 disable_acpi(); 1559 return 1; 1560 } 1561 } 1562 1563 /* 1564 * Process the Multiple APIC Description Table (MADT), if present 1565 */ 1566 early_acpi_process_madt(); 1567 1568 /* 1569 * Hardware-reduced ACPI mode initialization: 1570 */ 1571 acpi_reduced_hw_init(); 1572 1573 return 0; 1574 } 1575 1576 int __init acpi_boot_init(void) 1577 { 1578 /* those are executed after early-quirks are executed */ 1579 dmi_check_system(acpi_dmi_table_late); 1580 1581 /* 1582 * If acpi_disabled, bail out 1583 */ 1584 if (acpi_disabled) 1585 return 1; 1586 1587 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf); 1588 1589 /* 1590 * set sci_int and PM timer address 1591 */ 1592 acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt); 1593 1594 /* 1595 * Process the Multiple APIC Description Table (MADT), if present 1596 */ 1597 acpi_process_madt(); 1598 1599 acpi_table_parse(ACPI_SIG_HPET, acpi_parse_hpet); 1600 if (IS_ENABLED(CONFIG_ACPI_BGRT) && !acpi_nobgrt) 1601 acpi_table_parse(ACPI_SIG_BGRT, acpi_parse_bgrt); 1602 1603 if (!acpi_noirq) 1604 x86_init.pci.init = pci_acpi_init; 1605 1606 /* Do not enable ACPI SPCR console by default */ 1607 acpi_parse_spcr(earlycon_acpi_spcr_enable, false); 1608 return 0; 1609 } 1610 1611 static int __init parse_acpi(char *arg) 1612 { 1613 if (!arg) 1614 return -EINVAL; 1615 1616 /* "acpi=off" disables both ACPI table parsing and interpreter */ 1617 if (strcmp(arg, "off") == 0) { 1618 disable_acpi(); 1619 } 1620 /* acpi=force to over-ride black-list */ 1621 else if (strcmp(arg, "force") == 0) { 1622 acpi_force = 1; 1623 acpi_disabled = 0; 1624 } 1625 /* acpi=strict disables out-of-spec workarounds */ 1626 else if (strcmp(arg, "strict") == 0) { 1627 acpi_strict = 1; 1628 } 1629 /* acpi=rsdt use RSDT instead of XSDT */ 1630 else if (strcmp(arg, "rsdt") == 0) { 1631 acpi_gbl_do_not_use_xsdt = TRUE; 1632 } 1633 /* "acpi=noirq" disables ACPI interrupt routing */ 1634 else if (strcmp(arg, "noirq") == 0) { 1635 acpi_noirq_set(); 1636 } 1637 /* "acpi=copy_dsdt" copies DSDT */ 1638 else if (strcmp(arg, "copy_dsdt") == 0) { 1639 acpi_gbl_copy_dsdt_locally = 1; 1640 } 1641 /* "acpi=nocmcff" disables FF mode for corrected errors */ 1642 else if (strcmp(arg, "nocmcff") == 0) { 1643 acpi_disable_cmcff = 1; 1644 } else { 1645 /* Core will printk when we return error. */ 1646 return -EINVAL; 1647 } 1648 return 0; 1649 } 1650 early_param("acpi", parse_acpi); 1651 1652 static int __init parse_acpi_bgrt(char *arg) 1653 { 1654 acpi_nobgrt = true; 1655 return 0; 1656 } 1657 early_param("bgrt_disable", parse_acpi_bgrt); 1658 1659 /* FIXME: Using pci= for an ACPI parameter is a travesty. */ 1660 static int __init parse_pci(char *arg) 1661 { 1662 if (arg && strcmp(arg, "noacpi") == 0) 1663 acpi_disable_pci(); 1664 return 0; 1665 } 1666 early_param("pci", parse_pci); 1667 1668 int __init acpi_mps_check(void) 1669 { 1670 #if defined(CONFIG_X86_LOCAL_APIC) && !defined(CONFIG_X86_MPPARSE) 1671 /* mptable code is not built-in*/ 1672 if (acpi_disabled || acpi_noirq) { 1673 pr_warn("MPS support code is not built-in, using acpi=off or acpi=noirq or pci=noacpi may have problem\n"); 1674 return 1; 1675 } 1676 #endif 1677 return 0; 1678 } 1679 1680 #ifdef CONFIG_X86_IO_APIC 1681 static int __init parse_acpi_skip_timer_override(char *arg) 1682 { 1683 acpi_skip_timer_override = 1; 1684 return 0; 1685 } 1686 early_param("acpi_skip_timer_override", parse_acpi_skip_timer_override); 1687 1688 static int __init parse_acpi_use_timer_override(char *arg) 1689 { 1690 acpi_use_timer_override = 1; 1691 return 0; 1692 } 1693 early_param("acpi_use_timer_override", parse_acpi_use_timer_override); 1694 #endif /* CONFIG_X86_IO_APIC */ 1695 1696 static int __init setup_acpi_sci(char *s) 1697 { 1698 if (!s) 1699 return -EINVAL; 1700 if (!strcmp(s, "edge")) 1701 acpi_sci_flags = ACPI_MADT_TRIGGER_EDGE | 1702 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK); 1703 else if (!strcmp(s, "level")) 1704 acpi_sci_flags = ACPI_MADT_TRIGGER_LEVEL | 1705 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK); 1706 else if (!strcmp(s, "high")) 1707 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_HIGH | 1708 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK); 1709 else if (!strcmp(s, "low")) 1710 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_LOW | 1711 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK); 1712 else 1713 return -EINVAL; 1714 return 0; 1715 } 1716 early_param("acpi_sci", setup_acpi_sci); 1717 1718 int __acpi_acquire_global_lock(unsigned int *lock) 1719 { 1720 unsigned int old, new, val; 1721 do { 1722 old = *lock; 1723 new = (((old & ~0x3) + 2) + ((old >> 1) & 0x1)); 1724 val = cmpxchg(lock, old, new); 1725 } while (unlikely (val != old)); 1726 return ((new & 0x3) < 3) ? -1 : 0; 1727 } 1728 1729 int __acpi_release_global_lock(unsigned int *lock) 1730 { 1731 unsigned int old, new, val; 1732 do { 1733 old = *lock; 1734 new = old & ~0x3; 1735 val = cmpxchg(lock, old, new); 1736 } while (unlikely (val != old)); 1737 return old & 0x1; 1738 } 1739 1740 void __init arch_reserve_mem_area(acpi_physical_address addr, size_t size) 1741 { 1742 e820__range_add(addr, size, E820_TYPE_ACPI); 1743 e820__update_table_print(); 1744 } 1745 1746 void x86_default_set_root_pointer(u64 addr) 1747 { 1748 boot_params.acpi_rsdp_addr = addr; 1749 } 1750 1751 u64 x86_default_get_root_pointer(void) 1752 { 1753 return boot_params.acpi_rsdp_addr; 1754 } 1755