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 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 printk(KERN_WARNING PREFIX "Unable to map MADT\n"); 133 return -ENODEV; 134 } 135 136 if (madt->address) { 137 acpi_lapic_addr = (u64) madt->address; 138 139 printk(KERN_DEBUG PREFIX "Local APIC address 0x%08x\n", 140 madt->address); 141 } 142 143 default_acpi_madt_oem_check(madt->header.oem_id, 144 madt->header.oem_table_id); 145 146 return 0; 147 } 148 149 /** 150 * acpi_register_lapic - register a local apic and generates a logic cpu number 151 * @id: local apic id to register 152 * @acpiid: ACPI id to register 153 * @enabled: this cpu is enabled or not 154 * 155 * Returns the logic cpu number which maps to the local apic 156 */ 157 static int acpi_register_lapic(int id, u32 acpiid, u8 enabled) 158 { 159 unsigned int ver = 0; 160 int cpu; 161 162 if (id >= MAX_LOCAL_APIC) { 163 printk(KERN_INFO PREFIX "skipped apicid that is too big\n"); 164 return -EINVAL; 165 } 166 167 if (!enabled) { 168 ++disabled_cpus; 169 return -EINVAL; 170 } 171 172 if (boot_cpu_physical_apicid != -1U) 173 ver = boot_cpu_apic_version; 174 175 cpu = generic_processor_info(id, ver); 176 if (cpu >= 0) 177 early_per_cpu(x86_cpu_to_acpiid, cpu) = acpiid; 178 179 return cpu; 180 } 181 182 static int __init 183 acpi_parse_x2apic(union acpi_subtable_headers *header, const unsigned long end) 184 { 185 struct acpi_madt_local_x2apic *processor = NULL; 186 #ifdef CONFIG_X86_X2APIC 187 u32 apic_id; 188 u8 enabled; 189 #endif 190 191 processor = (struct acpi_madt_local_x2apic *)header; 192 193 if (BAD_MADT_ENTRY(processor, end)) 194 return -EINVAL; 195 196 acpi_table_print_madt_entry(&header->common); 197 198 #ifdef CONFIG_X86_X2APIC 199 apic_id = processor->local_apic_id; 200 enabled = processor->lapic_flags & ACPI_MADT_ENABLED; 201 202 /* Ignore invalid ID */ 203 if (apic_id == 0xffffffff) 204 return 0; 205 206 /* 207 * We need to register disabled CPU as well to permit 208 * counting disabled CPUs. This allows us to size 209 * cpus_possible_map more accurately, to permit 210 * to not preallocating memory for all NR_CPUS 211 * when we use CPU hotplug. 212 */ 213 if (!apic->apic_id_valid(apic_id)) { 214 if (enabled) 215 pr_warn(PREFIX "x2apic entry ignored\n"); 216 return 0; 217 } 218 219 acpi_register_lapic(apic_id, processor->uid, enabled); 220 #else 221 printk(KERN_WARNING PREFIX "x2apic entry ignored\n"); 222 #endif 223 224 return 0; 225 } 226 227 static int __init 228 acpi_parse_lapic(union acpi_subtable_headers * header, const unsigned long end) 229 { 230 struct acpi_madt_local_apic *processor = NULL; 231 232 processor = (struct acpi_madt_local_apic *)header; 233 234 if (BAD_MADT_ENTRY(processor, end)) 235 return -EINVAL; 236 237 acpi_table_print_madt_entry(&header->common); 238 239 /* Ignore invalid ID */ 240 if (processor->id == 0xff) 241 return 0; 242 243 /* 244 * We need to register disabled CPU as well to permit 245 * counting disabled CPUs. This allows us to size 246 * cpus_possible_map more accurately, to permit 247 * to not preallocating memory for all NR_CPUS 248 * when we use CPU hotplug. 249 */ 250 acpi_register_lapic(processor->id, /* APIC ID */ 251 processor->processor_id, /* ACPI ID */ 252 processor->lapic_flags & ACPI_MADT_ENABLED); 253 254 return 0; 255 } 256 257 static int __init 258 acpi_parse_sapic(union acpi_subtable_headers *header, const unsigned long end) 259 { 260 struct acpi_madt_local_sapic *processor = NULL; 261 262 processor = (struct acpi_madt_local_sapic *)header; 263 264 if (BAD_MADT_ENTRY(processor, end)) 265 return -EINVAL; 266 267 acpi_table_print_madt_entry(&header->common); 268 269 acpi_register_lapic((processor->id << 8) | processor->eid,/* APIC ID */ 270 processor->processor_id, /* ACPI ID */ 271 processor->lapic_flags & ACPI_MADT_ENABLED); 272 273 return 0; 274 } 275 276 static int __init 277 acpi_parse_lapic_addr_ovr(union acpi_subtable_headers * header, 278 const unsigned long end) 279 { 280 struct acpi_madt_local_apic_override *lapic_addr_ovr = NULL; 281 282 lapic_addr_ovr = (struct acpi_madt_local_apic_override *)header; 283 284 if (BAD_MADT_ENTRY(lapic_addr_ovr, end)) 285 return -EINVAL; 286 287 acpi_table_print_madt_entry(&header->common); 288 289 acpi_lapic_addr = lapic_addr_ovr->address; 290 291 return 0; 292 } 293 294 static int __init 295 acpi_parse_x2apic_nmi(union acpi_subtable_headers *header, 296 const unsigned long end) 297 { 298 struct acpi_madt_local_x2apic_nmi *x2apic_nmi = NULL; 299 300 x2apic_nmi = (struct acpi_madt_local_x2apic_nmi *)header; 301 302 if (BAD_MADT_ENTRY(x2apic_nmi, end)) 303 return -EINVAL; 304 305 acpi_table_print_madt_entry(&header->common); 306 307 if (x2apic_nmi->lint != 1) 308 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n"); 309 310 return 0; 311 } 312 313 static int __init 314 acpi_parse_lapic_nmi(union acpi_subtable_headers * header, const unsigned long end) 315 { 316 struct acpi_madt_local_apic_nmi *lapic_nmi = NULL; 317 318 lapic_nmi = (struct acpi_madt_local_apic_nmi *)header; 319 320 if (BAD_MADT_ENTRY(lapic_nmi, end)) 321 return -EINVAL; 322 323 acpi_table_print_madt_entry(&header->common); 324 325 if (lapic_nmi->lint != 1) 326 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n"); 327 328 return 0; 329 } 330 331 #endif /*CONFIG_X86_LOCAL_APIC */ 332 333 #ifdef CONFIG_X86_IO_APIC 334 #define MP_ISA_BUS 0 335 336 static int __init mp_register_ioapic_irq(u8 bus_irq, u8 polarity, 337 u8 trigger, u32 gsi); 338 339 static void __init mp_override_legacy_irq(u8 bus_irq, u8 polarity, u8 trigger, 340 u32 gsi) 341 { 342 /* 343 * Check bus_irq boundary. 344 */ 345 if (bus_irq >= NR_IRQS_LEGACY) { 346 pr_warn("Invalid bus_irq %u for legacy override\n", bus_irq); 347 return; 348 } 349 350 /* 351 * TBD: This check is for faulty timer entries, where the override 352 * erroneously sets the trigger to level, resulting in a HUGE 353 * increase of timer interrupts! 354 */ 355 if ((bus_irq == 0) && (trigger == 3)) 356 trigger = 1; 357 358 if (mp_register_ioapic_irq(bus_irq, polarity, trigger, gsi) < 0) 359 return; 360 /* 361 * Reset default identity mapping if gsi is also an legacy IRQ, 362 * otherwise there will be more than one entry with the same GSI 363 * and acpi_isa_irq_to_gsi() may give wrong result. 364 */ 365 if (gsi < nr_legacy_irqs() && isa_irq_to_gsi[gsi] == gsi) 366 isa_irq_to_gsi[gsi] = INVALID_ACPI_IRQ; 367 isa_irq_to_gsi[bus_irq] = gsi; 368 } 369 370 static int mp_config_acpi_gsi(struct device *dev, u32 gsi, int trigger, 371 int polarity) 372 { 373 #ifdef CONFIG_X86_MPPARSE 374 struct mpc_intsrc mp_irq; 375 struct pci_dev *pdev; 376 unsigned char number; 377 unsigned int devfn; 378 int ioapic; 379 u8 pin; 380 381 if (!acpi_ioapic) 382 return 0; 383 if (!dev || !dev_is_pci(dev)) 384 return 0; 385 386 pdev = to_pci_dev(dev); 387 number = pdev->bus->number; 388 devfn = pdev->devfn; 389 pin = pdev->pin; 390 /* print the entry should happen on mptable identically */ 391 mp_irq.type = MP_INTSRC; 392 mp_irq.irqtype = mp_INT; 393 mp_irq.irqflag = (trigger == ACPI_EDGE_SENSITIVE ? 4 : 0x0c) | 394 (polarity == ACPI_ACTIVE_HIGH ? 1 : 3); 395 mp_irq.srcbus = number; 396 mp_irq.srcbusirq = (((devfn >> 3) & 0x1f) << 2) | ((pin - 1) & 3); 397 ioapic = mp_find_ioapic(gsi); 398 mp_irq.dstapic = mpc_ioapic_id(ioapic); 399 mp_irq.dstirq = mp_find_ioapic_pin(ioapic, gsi); 400 401 mp_save_irq(&mp_irq); 402 #endif 403 return 0; 404 } 405 406 static int __init mp_register_ioapic_irq(u8 bus_irq, u8 polarity, 407 u8 trigger, u32 gsi) 408 { 409 struct mpc_intsrc mp_irq; 410 int ioapic, pin; 411 412 /* Convert 'gsi' to 'ioapic.pin'(INTIN#) */ 413 ioapic = mp_find_ioapic(gsi); 414 if (ioapic < 0) { 415 pr_warn("Failed to find ioapic for gsi : %u\n", gsi); 416 return ioapic; 417 } 418 419 pin = mp_find_ioapic_pin(ioapic, gsi); 420 421 mp_irq.type = MP_INTSRC; 422 mp_irq.irqtype = mp_INT; 423 mp_irq.irqflag = (trigger << 2) | polarity; 424 mp_irq.srcbus = MP_ISA_BUS; 425 mp_irq.srcbusirq = bus_irq; 426 mp_irq.dstapic = mpc_ioapic_id(ioapic); 427 mp_irq.dstirq = pin; 428 429 mp_save_irq(&mp_irq); 430 431 return 0; 432 } 433 434 static int __init 435 acpi_parse_ioapic(union acpi_subtable_headers * header, const unsigned long end) 436 { 437 struct acpi_madt_io_apic *ioapic = NULL; 438 struct ioapic_domain_cfg cfg = { 439 .type = IOAPIC_DOMAIN_DYNAMIC, 440 .ops = &mp_ioapic_irqdomain_ops, 441 }; 442 443 ioapic = (struct acpi_madt_io_apic *)header; 444 445 if (BAD_MADT_ENTRY(ioapic, end)) 446 return -EINVAL; 447 448 acpi_table_print_madt_entry(&header->common); 449 450 /* Statically assign IRQ numbers for IOAPICs hosting legacy IRQs */ 451 if (ioapic->global_irq_base < nr_legacy_irqs()) 452 cfg.type = IOAPIC_DOMAIN_LEGACY; 453 454 mp_register_ioapic(ioapic->id, ioapic->address, ioapic->global_irq_base, 455 &cfg); 456 457 return 0; 458 } 459 460 /* 461 * Parse Interrupt Source Override for the ACPI SCI 462 */ 463 static void __init acpi_sci_ioapic_setup(u8 bus_irq, u16 polarity, u16 trigger, u32 gsi) 464 { 465 if (trigger == 0) /* compatible SCI trigger is level */ 466 trigger = 3; 467 468 if (polarity == 0) /* compatible SCI polarity is low */ 469 polarity = 3; 470 471 /* Command-line over-ride via acpi_sci= */ 472 if (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) 473 trigger = (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2; 474 475 if (acpi_sci_flags & ACPI_MADT_POLARITY_MASK) 476 polarity = acpi_sci_flags & ACPI_MADT_POLARITY_MASK; 477 478 if (bus_irq < NR_IRQS_LEGACY) 479 mp_override_legacy_irq(bus_irq, polarity, trigger, gsi); 480 else 481 mp_register_ioapic_irq(bus_irq, polarity, trigger, gsi); 482 483 acpi_penalize_sci_irq(bus_irq, trigger, polarity); 484 485 /* 486 * stash over-ride to indicate we've been here 487 * and for later update of acpi_gbl_FADT 488 */ 489 acpi_sci_override_gsi = gsi; 490 return; 491 } 492 493 static int __init 494 acpi_parse_int_src_ovr(union acpi_subtable_headers * header, 495 const unsigned long end) 496 { 497 struct acpi_madt_interrupt_override *intsrc = NULL; 498 499 intsrc = (struct acpi_madt_interrupt_override *)header; 500 501 if (BAD_MADT_ENTRY(intsrc, end)) 502 return -EINVAL; 503 504 acpi_table_print_madt_entry(&header->common); 505 506 if (intsrc->source_irq == acpi_gbl_FADT.sci_interrupt) { 507 acpi_sci_ioapic_setup(intsrc->source_irq, 508 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK, 509 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2, 510 intsrc->global_irq); 511 return 0; 512 } 513 514 if (intsrc->source_irq == 0) { 515 if (acpi_skip_timer_override) { 516 printk(PREFIX "BIOS IRQ0 override ignored.\n"); 517 return 0; 518 } 519 520 if ((intsrc->global_irq == 2) && acpi_fix_pin2_polarity 521 && (intsrc->inti_flags & ACPI_MADT_POLARITY_MASK)) { 522 intsrc->inti_flags &= ~ACPI_MADT_POLARITY_MASK; 523 printk(PREFIX "BIOS IRQ0 pin2 override: forcing polarity to high active.\n"); 524 } 525 } 526 527 mp_override_legacy_irq(intsrc->source_irq, 528 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK, 529 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2, 530 intsrc->global_irq); 531 532 return 0; 533 } 534 535 static int __init 536 acpi_parse_nmi_src(union acpi_subtable_headers * header, const unsigned long end) 537 { 538 struct acpi_madt_nmi_source *nmi_src = NULL; 539 540 nmi_src = (struct acpi_madt_nmi_source *)header; 541 542 if (BAD_MADT_ENTRY(nmi_src, end)) 543 return -EINVAL; 544 545 acpi_table_print_madt_entry(&header->common); 546 547 /* TBD: Support nimsrc entries? */ 548 549 return 0; 550 } 551 552 #endif /* CONFIG_X86_IO_APIC */ 553 554 /* 555 * acpi_pic_sci_set_trigger() 556 * 557 * use ELCR to set PIC-mode trigger type for SCI 558 * 559 * If a PIC-mode SCI is not recognized or gives spurious IRQ7's 560 * it may require Edge Trigger -- use "acpi_sci=edge" 561 * 562 * Port 0x4d0-4d1 are ECLR1 and ECLR2, the Edge/Level Control Registers 563 * for the 8259 PIC. bit[n] = 1 means irq[n] is Level, otherwise Edge. 564 * ECLR1 is IRQs 0-7 (IRQ 0, 1, 2 must be 0) 565 * ECLR2 is IRQs 8-15 (IRQ 8, 13 must be 0) 566 */ 567 568 void __init acpi_pic_sci_set_trigger(unsigned int irq, u16 trigger) 569 { 570 unsigned int mask = 1 << irq; 571 unsigned int old, new; 572 573 /* Real old ELCR mask */ 574 old = inb(0x4d0) | (inb(0x4d1) << 8); 575 576 /* 577 * If we use ACPI to set PCI IRQs, then we should clear ELCR 578 * since we will set it correctly as we enable the PCI irq 579 * routing. 580 */ 581 new = acpi_noirq ? old : 0; 582 583 /* 584 * Update SCI information in the ELCR, it isn't in the PCI 585 * routing tables.. 586 */ 587 switch (trigger) { 588 case 1: /* Edge - clear */ 589 new &= ~mask; 590 break; 591 case 3: /* Level - set */ 592 new |= mask; 593 break; 594 } 595 596 if (old == new) 597 return; 598 599 printk(PREFIX "setting ELCR to %04x (from %04x)\n", new, old); 600 outb(new, 0x4d0); 601 outb(new >> 8, 0x4d1); 602 } 603 604 int acpi_gsi_to_irq(u32 gsi, unsigned int *irqp) 605 { 606 int rc, irq, trigger, polarity; 607 608 if (acpi_irq_model == ACPI_IRQ_MODEL_PIC) { 609 *irqp = gsi; 610 return 0; 611 } 612 613 rc = acpi_get_override_irq(gsi, &trigger, &polarity); 614 if (rc) 615 return rc; 616 617 trigger = trigger ? ACPI_LEVEL_SENSITIVE : ACPI_EDGE_SENSITIVE; 618 polarity = polarity ? ACPI_ACTIVE_LOW : ACPI_ACTIVE_HIGH; 619 irq = acpi_register_gsi(NULL, gsi, trigger, polarity); 620 if (irq < 0) 621 return irq; 622 623 *irqp = irq; 624 return 0; 625 } 626 EXPORT_SYMBOL_GPL(acpi_gsi_to_irq); 627 628 int acpi_isa_irq_to_gsi(unsigned isa_irq, u32 *gsi) 629 { 630 if (isa_irq < nr_legacy_irqs() && 631 isa_irq_to_gsi[isa_irq] != INVALID_ACPI_IRQ) { 632 *gsi = isa_irq_to_gsi[isa_irq]; 633 return 0; 634 } 635 636 return -1; 637 } 638 639 static int acpi_register_gsi_pic(struct device *dev, u32 gsi, 640 int trigger, int polarity) 641 { 642 #ifdef CONFIG_PCI 643 /* 644 * Make sure all (legacy) PCI IRQs are set as level-triggered. 645 */ 646 if (trigger == ACPI_LEVEL_SENSITIVE) 647 elcr_set_level_irq(gsi); 648 #endif 649 650 return gsi; 651 } 652 653 #ifdef CONFIG_X86_LOCAL_APIC 654 static int acpi_register_gsi_ioapic(struct device *dev, u32 gsi, 655 int trigger, int polarity) 656 { 657 int irq = gsi; 658 #ifdef CONFIG_X86_IO_APIC 659 int node; 660 struct irq_alloc_info info; 661 662 node = dev ? dev_to_node(dev) : NUMA_NO_NODE; 663 trigger = trigger == ACPI_EDGE_SENSITIVE ? 0 : 1; 664 polarity = polarity == ACPI_ACTIVE_HIGH ? 0 : 1; 665 ioapic_set_alloc_attr(&info, node, trigger, polarity); 666 667 mutex_lock(&acpi_ioapic_lock); 668 irq = mp_map_gsi_to_irq(gsi, IOAPIC_MAP_ALLOC, &info); 669 /* Don't set up the ACPI SCI because it's already set up */ 670 if (irq >= 0 && enable_update_mptable && gsi != acpi_gbl_FADT.sci_interrupt) 671 mp_config_acpi_gsi(dev, gsi, trigger, polarity); 672 mutex_unlock(&acpi_ioapic_lock); 673 #endif 674 675 return irq; 676 } 677 678 static void acpi_unregister_gsi_ioapic(u32 gsi) 679 { 680 #ifdef CONFIG_X86_IO_APIC 681 int irq; 682 683 mutex_lock(&acpi_ioapic_lock); 684 irq = mp_map_gsi_to_irq(gsi, 0, NULL); 685 if (irq > 0) 686 mp_unmap_irq(irq); 687 mutex_unlock(&acpi_ioapic_lock); 688 #endif 689 } 690 #endif 691 692 int (*__acpi_register_gsi)(struct device *dev, u32 gsi, 693 int trigger, int polarity) = acpi_register_gsi_pic; 694 void (*__acpi_unregister_gsi)(u32 gsi) = NULL; 695 696 #ifdef CONFIG_ACPI_SLEEP 697 int (*acpi_suspend_lowlevel)(void) = x86_acpi_suspend_lowlevel; 698 #else 699 int (*acpi_suspend_lowlevel)(void); 700 #endif 701 702 /* 703 * success: return IRQ number (>=0) 704 * failure: return < 0 705 */ 706 int acpi_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity) 707 { 708 return __acpi_register_gsi(dev, gsi, trigger, polarity); 709 } 710 EXPORT_SYMBOL_GPL(acpi_register_gsi); 711 712 void acpi_unregister_gsi(u32 gsi) 713 { 714 if (__acpi_unregister_gsi) 715 __acpi_unregister_gsi(gsi); 716 } 717 EXPORT_SYMBOL_GPL(acpi_unregister_gsi); 718 719 #ifdef CONFIG_X86_LOCAL_APIC 720 static void __init acpi_set_irq_model_ioapic(void) 721 { 722 acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC; 723 __acpi_register_gsi = acpi_register_gsi_ioapic; 724 __acpi_unregister_gsi = acpi_unregister_gsi_ioapic; 725 acpi_ioapic = 1; 726 } 727 #endif 728 729 /* 730 * ACPI based hotplug support for CPU 731 */ 732 #ifdef CONFIG_ACPI_HOTPLUG_CPU 733 #include <acpi/processor.h> 734 735 static int acpi_map_cpu2node(acpi_handle handle, int cpu, int physid) 736 { 737 #ifdef CONFIG_ACPI_NUMA 738 int nid; 739 740 nid = acpi_get_node(handle); 741 if (nid != NUMA_NO_NODE) { 742 set_apicid_to_node(physid, nid); 743 numa_set_node(cpu, nid); 744 } 745 #endif 746 return 0; 747 } 748 749 int acpi_map_cpu(acpi_handle handle, phys_cpuid_t physid, u32 acpi_id, 750 int *pcpu) 751 { 752 int cpu; 753 754 cpu = acpi_register_lapic(physid, acpi_id, ACPI_MADT_ENABLED); 755 if (cpu < 0) { 756 pr_info(PREFIX "Unable to map lapic to logical cpu number\n"); 757 return cpu; 758 } 759 760 acpi_processor_set_pdc(handle); 761 acpi_map_cpu2node(handle, cpu, physid); 762 763 *pcpu = cpu; 764 return 0; 765 } 766 EXPORT_SYMBOL(acpi_map_cpu); 767 768 int acpi_unmap_cpu(int cpu) 769 { 770 #ifdef CONFIG_ACPI_NUMA 771 set_apicid_to_node(per_cpu(x86_cpu_to_apicid, cpu), NUMA_NO_NODE); 772 #endif 773 774 per_cpu(x86_cpu_to_apicid, cpu) = -1; 775 set_cpu_present(cpu, false); 776 num_processors--; 777 778 return (0); 779 } 780 EXPORT_SYMBOL(acpi_unmap_cpu); 781 #endif /* CONFIG_ACPI_HOTPLUG_CPU */ 782 783 int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base) 784 { 785 int ret = -ENOSYS; 786 #ifdef CONFIG_ACPI_HOTPLUG_IOAPIC 787 int ioapic_id; 788 u64 addr; 789 struct ioapic_domain_cfg cfg = { 790 .type = IOAPIC_DOMAIN_DYNAMIC, 791 .ops = &mp_ioapic_irqdomain_ops, 792 }; 793 794 ioapic_id = acpi_get_ioapic_id(handle, gsi_base, &addr); 795 if (ioapic_id < 0) { 796 unsigned long long uid; 797 acpi_status status; 798 799 status = acpi_evaluate_integer(handle, METHOD_NAME__UID, 800 NULL, &uid); 801 if (ACPI_FAILURE(status)) { 802 acpi_handle_warn(handle, "failed to get IOAPIC ID.\n"); 803 return -EINVAL; 804 } 805 ioapic_id = (int)uid; 806 } 807 808 mutex_lock(&acpi_ioapic_lock); 809 ret = mp_register_ioapic(ioapic_id, phys_addr, gsi_base, &cfg); 810 mutex_unlock(&acpi_ioapic_lock); 811 #endif 812 813 return ret; 814 } 815 EXPORT_SYMBOL(acpi_register_ioapic); 816 817 int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base) 818 { 819 int ret = -ENOSYS; 820 821 #ifdef CONFIG_ACPI_HOTPLUG_IOAPIC 822 mutex_lock(&acpi_ioapic_lock); 823 ret = mp_unregister_ioapic(gsi_base); 824 mutex_unlock(&acpi_ioapic_lock); 825 #endif 826 827 return ret; 828 } 829 EXPORT_SYMBOL(acpi_unregister_ioapic); 830 831 /** 832 * acpi_ioapic_registered - Check whether IOAPIC assoicatied with @gsi_base 833 * has been registered 834 * @handle: ACPI handle of the IOAPIC device 835 * @gsi_base: GSI base associated with the IOAPIC 836 * 837 * Assume caller holds some type of lock to serialize acpi_ioapic_registered() 838 * with acpi_register_ioapic()/acpi_unregister_ioapic(). 839 */ 840 int acpi_ioapic_registered(acpi_handle handle, u32 gsi_base) 841 { 842 int ret = 0; 843 844 #ifdef CONFIG_ACPI_HOTPLUG_IOAPIC 845 mutex_lock(&acpi_ioapic_lock); 846 ret = mp_ioapic_registered(gsi_base); 847 mutex_unlock(&acpi_ioapic_lock); 848 #endif 849 850 return ret; 851 } 852 853 static int __init acpi_parse_sbf(struct acpi_table_header *table) 854 { 855 struct acpi_table_boot *sb = (struct acpi_table_boot *)table; 856 857 sbf_port = sb->cmos_index; /* Save CMOS port */ 858 859 return 0; 860 } 861 862 #ifdef CONFIG_HPET_TIMER 863 #include <asm/hpet.h> 864 865 static struct resource *hpet_res __initdata; 866 867 static int __init acpi_parse_hpet(struct acpi_table_header *table) 868 { 869 struct acpi_table_hpet *hpet_tbl = (struct acpi_table_hpet *)table; 870 871 if (hpet_tbl->address.space_id != ACPI_SPACE_MEM) { 872 printk(KERN_WARNING PREFIX "HPET timers must be located in " 873 "memory.\n"); 874 return -1; 875 } 876 877 hpet_address = hpet_tbl->address.address; 878 hpet_blockid = hpet_tbl->sequence; 879 880 /* 881 * Some broken BIOSes advertise HPET at 0x0. We really do not 882 * want to allocate a resource there. 883 */ 884 if (!hpet_address) { 885 printk(KERN_WARNING PREFIX 886 "HPET id: %#x base: %#lx is invalid\n", 887 hpet_tbl->id, hpet_address); 888 return 0; 889 } 890 #ifdef CONFIG_X86_64 891 /* 892 * Some even more broken BIOSes advertise HPET at 893 * 0xfed0000000000000 instead of 0xfed00000. Fix it up and add 894 * some noise: 895 */ 896 if (hpet_address == 0xfed0000000000000UL) { 897 if (!hpet_force_user) { 898 printk(KERN_WARNING PREFIX "HPET id: %#x " 899 "base: 0xfed0000000000000 is bogus\n " 900 "try hpet=force on the kernel command line to " 901 "fix it up to 0xfed00000.\n", hpet_tbl->id); 902 hpet_address = 0; 903 return 0; 904 } 905 printk(KERN_WARNING PREFIX 906 "HPET id: %#x base: 0xfed0000000000000 fixed up " 907 "to 0xfed00000.\n", hpet_tbl->id); 908 hpet_address >>= 32; 909 } 910 #endif 911 printk(KERN_INFO PREFIX "HPET id: %#x base: %#lx\n", 912 hpet_tbl->id, hpet_address); 913 914 /* 915 * Allocate and initialize the HPET firmware resource for adding into 916 * the resource tree during the lateinit timeframe. 917 */ 918 #define HPET_RESOURCE_NAME_SIZE 9 919 hpet_res = memblock_alloc(sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE, 920 SMP_CACHE_BYTES); 921 if (!hpet_res) 922 panic("%s: Failed to allocate %zu bytes\n", __func__, 923 sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE); 924 925 hpet_res->name = (void *)&hpet_res[1]; 926 hpet_res->flags = IORESOURCE_MEM; 927 snprintf((char *)hpet_res->name, HPET_RESOURCE_NAME_SIZE, "HPET %u", 928 hpet_tbl->sequence); 929 930 hpet_res->start = hpet_address; 931 hpet_res->end = hpet_address + (1 * 1024) - 1; 932 933 return 0; 934 } 935 936 /* 937 * hpet_insert_resource inserts the HPET resources used into the resource 938 * tree. 939 */ 940 static __init int hpet_insert_resource(void) 941 { 942 if (!hpet_res) 943 return 1; 944 945 return insert_resource(&iomem_resource, hpet_res); 946 } 947 948 late_initcall(hpet_insert_resource); 949 950 #else 951 #define acpi_parse_hpet NULL 952 #endif 953 954 static int __init acpi_parse_fadt(struct acpi_table_header *table) 955 { 956 if (!(acpi_gbl_FADT.boot_flags & ACPI_FADT_LEGACY_DEVICES)) { 957 pr_debug("ACPI: no legacy devices present\n"); 958 x86_platform.legacy.devices.pnpbios = 0; 959 } 960 961 if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID && 962 !(acpi_gbl_FADT.boot_flags & ACPI_FADT_8042) && 963 x86_platform.legacy.i8042 != X86_LEGACY_I8042_PLATFORM_ABSENT) { 964 pr_debug("ACPI: i8042 controller is absent\n"); 965 x86_platform.legacy.i8042 = X86_LEGACY_I8042_FIRMWARE_ABSENT; 966 } 967 968 if (acpi_gbl_FADT.boot_flags & ACPI_FADT_NO_CMOS_RTC) { 969 pr_debug("ACPI: not registering RTC platform device\n"); 970 x86_platform.legacy.rtc = 0; 971 } 972 973 if (acpi_gbl_FADT.boot_flags & ACPI_FADT_NO_VGA) { 974 pr_debug("ACPI: probing for VGA not safe\n"); 975 x86_platform.legacy.no_vga = 1; 976 } 977 978 #ifdef CONFIG_X86_PM_TIMER 979 /* detect the location of the ACPI PM Timer */ 980 if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID) { 981 /* FADT rev. 2 */ 982 if (acpi_gbl_FADT.xpm_timer_block.space_id != 983 ACPI_ADR_SPACE_SYSTEM_IO) 984 return 0; 985 986 pmtmr_ioport = acpi_gbl_FADT.xpm_timer_block.address; 987 /* 988 * "X" fields are optional extensions to the original V1.0 989 * fields, so we must selectively expand V1.0 fields if the 990 * corresponding X field is zero. 991 */ 992 if (!pmtmr_ioport) 993 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block; 994 } else { 995 /* FADT rev. 1 */ 996 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block; 997 } 998 if (pmtmr_ioport) 999 printk(KERN_INFO PREFIX "PM-Timer IO Port: %#x\n", 1000 pmtmr_ioport); 1001 #endif 1002 return 0; 1003 } 1004 1005 #ifdef CONFIG_X86_LOCAL_APIC 1006 /* 1007 * Parse LAPIC entries in MADT 1008 * returns 0 on success, < 0 on error 1009 */ 1010 1011 static int __init early_acpi_parse_madt_lapic_addr_ovr(void) 1012 { 1013 int count; 1014 1015 if (!boot_cpu_has(X86_FEATURE_APIC)) 1016 return -ENODEV; 1017 1018 /* 1019 * Note that the LAPIC address is obtained from the MADT (32-bit value) 1020 * and (optionally) overridden by a LAPIC_ADDR_OVR entry (64-bit value). 1021 */ 1022 1023 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE, 1024 acpi_parse_lapic_addr_ovr, 0); 1025 if (count < 0) { 1026 printk(KERN_ERR PREFIX 1027 "Error parsing LAPIC address override entry\n"); 1028 return count; 1029 } 1030 1031 register_lapic_address(acpi_lapic_addr); 1032 1033 return count; 1034 } 1035 1036 static int __init acpi_parse_madt_lapic_entries(void) 1037 { 1038 int count; 1039 int x2count = 0; 1040 int ret; 1041 struct acpi_subtable_proc madt_proc[2]; 1042 1043 if (!boot_cpu_has(X86_FEATURE_APIC)) 1044 return -ENODEV; 1045 1046 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC, 1047 acpi_parse_sapic, MAX_LOCAL_APIC); 1048 1049 if (!count) { 1050 memset(madt_proc, 0, sizeof(madt_proc)); 1051 madt_proc[0].id = ACPI_MADT_TYPE_LOCAL_APIC; 1052 madt_proc[0].handler = acpi_parse_lapic; 1053 madt_proc[1].id = ACPI_MADT_TYPE_LOCAL_X2APIC; 1054 madt_proc[1].handler = acpi_parse_x2apic; 1055 ret = acpi_table_parse_entries_array(ACPI_SIG_MADT, 1056 sizeof(struct acpi_table_madt), 1057 madt_proc, ARRAY_SIZE(madt_proc), MAX_LOCAL_APIC); 1058 if (ret < 0) { 1059 printk(KERN_ERR PREFIX 1060 "Error parsing LAPIC/X2APIC entries\n"); 1061 return ret; 1062 } 1063 1064 count = madt_proc[0].count; 1065 x2count = madt_proc[1].count; 1066 } 1067 if (!count && !x2count) { 1068 printk(KERN_ERR PREFIX "No LAPIC entries present\n"); 1069 /* TBD: Cleanup to allow fallback to MPS */ 1070 return -ENODEV; 1071 } else if (count < 0 || x2count < 0) { 1072 printk(KERN_ERR PREFIX "Error parsing LAPIC entry\n"); 1073 /* TBD: Cleanup to allow fallback to MPS */ 1074 return count; 1075 } 1076 1077 x2count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC_NMI, 1078 acpi_parse_x2apic_nmi, 0); 1079 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI, 1080 acpi_parse_lapic_nmi, 0); 1081 if (count < 0 || x2count < 0) { 1082 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n"); 1083 /* TBD: Cleanup to allow fallback to MPS */ 1084 return count; 1085 } 1086 return 0; 1087 } 1088 #endif /* CONFIG_X86_LOCAL_APIC */ 1089 1090 #ifdef CONFIG_X86_IO_APIC 1091 static void __init mp_config_acpi_legacy_irqs(void) 1092 { 1093 int i; 1094 struct mpc_intsrc mp_irq; 1095 1096 #ifdef CONFIG_EISA 1097 /* 1098 * Fabricate the legacy ISA bus (bus #31). 1099 */ 1100 mp_bus_id_to_type[MP_ISA_BUS] = MP_BUS_ISA; 1101 #endif 1102 set_bit(MP_ISA_BUS, mp_bus_not_pci); 1103 pr_debug("Bus #%d is ISA (nIRQs: %d)\n", MP_ISA_BUS, nr_legacy_irqs()); 1104 1105 /* 1106 * Use the default configuration for the IRQs 0-15. Unless 1107 * overridden by (MADT) interrupt source override entries. 1108 */ 1109 for (i = 0; i < nr_legacy_irqs(); i++) { 1110 int ioapic, pin; 1111 unsigned int dstapic; 1112 int idx; 1113 u32 gsi; 1114 1115 /* Locate the gsi that irq i maps to. */ 1116 if (acpi_isa_irq_to_gsi(i, &gsi)) 1117 continue; 1118 1119 /* 1120 * Locate the IOAPIC that manages the ISA IRQ. 1121 */ 1122 ioapic = mp_find_ioapic(gsi); 1123 if (ioapic < 0) 1124 continue; 1125 pin = mp_find_ioapic_pin(ioapic, gsi); 1126 dstapic = mpc_ioapic_id(ioapic); 1127 1128 for (idx = 0; idx < mp_irq_entries; idx++) { 1129 struct mpc_intsrc *irq = mp_irqs + idx; 1130 1131 /* Do we already have a mapping for this ISA IRQ? */ 1132 if (irq->srcbus == MP_ISA_BUS && irq->srcbusirq == i) 1133 break; 1134 1135 /* Do we already have a mapping for this IOAPIC pin */ 1136 if (irq->dstapic == dstapic && irq->dstirq == pin) 1137 break; 1138 } 1139 1140 if (idx != mp_irq_entries) { 1141 printk(KERN_DEBUG "ACPI: IRQ%d used by override.\n", i); 1142 continue; /* IRQ already used */ 1143 } 1144 1145 mp_irq.type = MP_INTSRC; 1146 mp_irq.irqflag = 0; /* Conforming */ 1147 mp_irq.srcbus = MP_ISA_BUS; 1148 mp_irq.dstapic = dstapic; 1149 mp_irq.irqtype = mp_INT; 1150 mp_irq.srcbusirq = i; /* Identity mapped */ 1151 mp_irq.dstirq = pin; 1152 1153 mp_save_irq(&mp_irq); 1154 } 1155 } 1156 1157 /* 1158 * Parse IOAPIC related entries in MADT 1159 * returns 0 on success, < 0 on error 1160 */ 1161 static int __init acpi_parse_madt_ioapic_entries(void) 1162 { 1163 int count; 1164 1165 /* 1166 * ACPI interpreter is required to complete interrupt setup, 1167 * so if it is off, don't enumerate the io-apics with ACPI. 1168 * If MPS is present, it will handle them, 1169 * otherwise the system will stay in PIC mode 1170 */ 1171 if (acpi_disabled || acpi_noirq) 1172 return -ENODEV; 1173 1174 if (!boot_cpu_has(X86_FEATURE_APIC)) 1175 return -ENODEV; 1176 1177 /* 1178 * if "noapic" boot option, don't look for IO-APICs 1179 */ 1180 if (skip_ioapic_setup) { 1181 printk(KERN_INFO PREFIX "Skipping IOAPIC probe " 1182 "due to 'noapic' option.\n"); 1183 return -ENODEV; 1184 } 1185 1186 count = acpi_table_parse_madt(ACPI_MADT_TYPE_IO_APIC, acpi_parse_ioapic, 1187 MAX_IO_APICS); 1188 if (!count) { 1189 printk(KERN_ERR PREFIX "No IOAPIC entries present\n"); 1190 return -ENODEV; 1191 } else if (count < 0) { 1192 printk(KERN_ERR PREFIX "Error parsing IOAPIC entry\n"); 1193 return count; 1194 } 1195 1196 count = acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE, 1197 acpi_parse_int_src_ovr, nr_irqs); 1198 if (count < 0) { 1199 printk(KERN_ERR PREFIX 1200 "Error parsing interrupt source overrides entry\n"); 1201 /* TBD: Cleanup to allow fallback to MPS */ 1202 return count; 1203 } 1204 1205 /* 1206 * If BIOS did not supply an INT_SRC_OVR for the SCI 1207 * pretend we got one so we can set the SCI flags. 1208 * But ignore setting up SCI on hardware reduced platforms. 1209 */ 1210 if (acpi_sci_override_gsi == INVALID_ACPI_IRQ && !acpi_gbl_reduced_hardware) 1211 acpi_sci_ioapic_setup(acpi_gbl_FADT.sci_interrupt, 0, 0, 1212 acpi_gbl_FADT.sci_interrupt); 1213 1214 /* Fill in identity legacy mappings where no override */ 1215 mp_config_acpi_legacy_irqs(); 1216 1217 count = acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE, 1218 acpi_parse_nmi_src, nr_irqs); 1219 if (count < 0) { 1220 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n"); 1221 /* TBD: Cleanup to allow fallback to MPS */ 1222 return count; 1223 } 1224 1225 return 0; 1226 } 1227 #else 1228 static inline int acpi_parse_madt_ioapic_entries(void) 1229 { 1230 return -1; 1231 } 1232 #endif /* !CONFIG_X86_IO_APIC */ 1233 1234 static void __init early_acpi_process_madt(void) 1235 { 1236 #ifdef CONFIG_X86_LOCAL_APIC 1237 int error; 1238 1239 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) { 1240 1241 /* 1242 * Parse MADT LAPIC entries 1243 */ 1244 error = early_acpi_parse_madt_lapic_addr_ovr(); 1245 if (!error) { 1246 acpi_lapic = 1; 1247 smp_found_config = 1; 1248 } 1249 if (error == -EINVAL) { 1250 /* 1251 * Dell Precision Workstation 410, 610 come here. 1252 */ 1253 printk(KERN_ERR PREFIX 1254 "Invalid BIOS MADT, disabling ACPI\n"); 1255 disable_acpi(); 1256 } 1257 } 1258 #endif 1259 } 1260 1261 static void __init acpi_process_madt(void) 1262 { 1263 #ifdef CONFIG_X86_LOCAL_APIC 1264 int error; 1265 1266 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) { 1267 1268 /* 1269 * Parse MADT LAPIC entries 1270 */ 1271 error = acpi_parse_madt_lapic_entries(); 1272 if (!error) { 1273 acpi_lapic = 1; 1274 1275 /* 1276 * Parse MADT IO-APIC entries 1277 */ 1278 mutex_lock(&acpi_ioapic_lock); 1279 error = acpi_parse_madt_ioapic_entries(); 1280 mutex_unlock(&acpi_ioapic_lock); 1281 if (!error) { 1282 acpi_set_irq_model_ioapic(); 1283 1284 smp_found_config = 1; 1285 } 1286 } 1287 if (error == -EINVAL) { 1288 /* 1289 * Dell Precision Workstation 410, 610 come here. 1290 */ 1291 printk(KERN_ERR PREFIX 1292 "Invalid BIOS MADT, disabling ACPI\n"); 1293 disable_acpi(); 1294 } 1295 } else { 1296 /* 1297 * ACPI found no MADT, and so ACPI wants UP PIC mode. 1298 * In the event an MPS table was found, forget it. 1299 * Boot with "acpi=off" to use MPS on such a system. 1300 */ 1301 if (smp_found_config) { 1302 printk(KERN_WARNING PREFIX 1303 "No APIC-table, disabling MPS\n"); 1304 smp_found_config = 0; 1305 } 1306 } 1307 1308 /* 1309 * ACPI supports both logical (e.g. Hyper-Threading) and physical 1310 * processors, where MPS only supports physical. 1311 */ 1312 if (acpi_lapic && acpi_ioapic) 1313 printk(KERN_INFO "Using ACPI (MADT) for SMP configuration " 1314 "information\n"); 1315 else if (acpi_lapic) 1316 printk(KERN_INFO "Using ACPI for processor (LAPIC) " 1317 "configuration information\n"); 1318 #endif 1319 return; 1320 } 1321 1322 static int __init disable_acpi_irq(const struct dmi_system_id *d) 1323 { 1324 if (!acpi_force) { 1325 printk(KERN_NOTICE "%s detected: force use of acpi=noirq\n", 1326 d->ident); 1327 acpi_noirq_set(); 1328 } 1329 return 0; 1330 } 1331 1332 static int __init disable_acpi_pci(const struct dmi_system_id *d) 1333 { 1334 if (!acpi_force) { 1335 printk(KERN_NOTICE "%s detected: force use of pci=noacpi\n", 1336 d->ident); 1337 acpi_disable_pci(); 1338 } 1339 return 0; 1340 } 1341 1342 static int __init dmi_disable_acpi(const struct dmi_system_id *d) 1343 { 1344 if (!acpi_force) { 1345 printk(KERN_NOTICE "%s detected: acpi off\n", d->ident); 1346 disable_acpi(); 1347 } else { 1348 printk(KERN_NOTICE 1349 "Warning: DMI blacklist says broken, but acpi forced\n"); 1350 } 1351 return 0; 1352 } 1353 1354 /* 1355 * Force ignoring BIOS IRQ0 override 1356 */ 1357 static int __init dmi_ignore_irq0_timer_override(const struct dmi_system_id *d) 1358 { 1359 if (!acpi_skip_timer_override) { 1360 pr_notice("%s detected: Ignoring BIOS IRQ0 override\n", 1361 d->ident); 1362 acpi_skip_timer_override = 1; 1363 } 1364 return 0; 1365 } 1366 1367 /* 1368 * ACPI offers an alternative platform interface model that removes 1369 * ACPI hardware requirements for platforms that do not implement 1370 * the PC Architecture. 1371 * 1372 * We initialize the Hardware-reduced ACPI model here: 1373 */ 1374 void __init acpi_generic_reduced_hw_init(void) 1375 { 1376 /* 1377 * Override x86_init functions and bypass legacy PIC in 1378 * hardware reduced ACPI mode. 1379 */ 1380 x86_init.timers.timer_init = x86_init_noop; 1381 x86_init.irqs.pre_vector_init = x86_init_noop; 1382 legacy_pic = &null_legacy_pic; 1383 } 1384 1385 static void __init acpi_reduced_hw_init(void) 1386 { 1387 if (acpi_gbl_reduced_hardware) 1388 x86_init.acpi.reduced_hw_early_init(); 1389 } 1390 1391 /* 1392 * If your system is blacklisted here, but you find that acpi=force 1393 * works for you, please contact linux-acpi@vger.kernel.org 1394 */ 1395 static const struct dmi_system_id acpi_dmi_table[] __initconst = { 1396 /* 1397 * Boxes that need ACPI disabled 1398 */ 1399 { 1400 .callback = dmi_disable_acpi, 1401 .ident = "IBM Thinkpad", 1402 .matches = { 1403 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), 1404 DMI_MATCH(DMI_BOARD_NAME, "2629H1G"), 1405 }, 1406 }, 1407 1408 /* 1409 * Boxes that need ACPI PCI IRQ routing disabled 1410 */ 1411 { 1412 .callback = disable_acpi_irq, 1413 .ident = "ASUS A7V", 1414 .matches = { 1415 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC"), 1416 DMI_MATCH(DMI_BOARD_NAME, "<A7V>"), 1417 /* newer BIOS, Revision 1011, does work */ 1418 DMI_MATCH(DMI_BIOS_VERSION, 1419 "ASUS A7V ACPI BIOS Revision 1007"), 1420 }, 1421 }, 1422 { 1423 /* 1424 * Latest BIOS for IBM 600E (1.16) has bad pcinum 1425 * for LPC bridge, which is needed for the PCI 1426 * interrupt links to work. DSDT fix is in bug 5966. 1427 * 2645, 2646 model numbers are shared with 600/600E/600X 1428 */ 1429 .callback = disable_acpi_irq, 1430 .ident = "IBM Thinkpad 600 Series 2645", 1431 .matches = { 1432 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), 1433 DMI_MATCH(DMI_BOARD_NAME, "2645"), 1434 }, 1435 }, 1436 { 1437 .callback = disable_acpi_irq, 1438 .ident = "IBM Thinkpad 600 Series 2646", 1439 .matches = { 1440 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), 1441 DMI_MATCH(DMI_BOARD_NAME, "2646"), 1442 }, 1443 }, 1444 /* 1445 * Boxes that need ACPI PCI IRQ routing and PCI scan disabled 1446 */ 1447 { /* _BBN 0 bug */ 1448 .callback = disable_acpi_pci, 1449 .ident = "ASUS PR-DLS", 1450 .matches = { 1451 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."), 1452 DMI_MATCH(DMI_BOARD_NAME, "PR-DLS"), 1453 DMI_MATCH(DMI_BIOS_VERSION, 1454 "ASUS PR-DLS ACPI BIOS Revision 1010"), 1455 DMI_MATCH(DMI_BIOS_DATE, "03/21/2003") 1456 }, 1457 }, 1458 { 1459 .callback = disable_acpi_pci, 1460 .ident = "Acer TravelMate 36x Laptop", 1461 .matches = { 1462 DMI_MATCH(DMI_SYS_VENDOR, "Acer"), 1463 DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"), 1464 }, 1465 }, 1466 {} 1467 }; 1468 1469 /* second table for DMI checks that should run after early-quirks */ 1470 static const struct dmi_system_id acpi_dmi_table_late[] __initconst = { 1471 /* 1472 * HP laptops which use a DSDT reporting as HP/SB400/10000, 1473 * which includes some code which overrides all temperature 1474 * trip points to 16C if the INTIN2 input of the I/O APIC 1475 * is enabled. This input is incorrectly designated the 1476 * ISA IRQ 0 via an interrupt source override even though 1477 * it is wired to the output of the master 8259A and INTIN0 1478 * is not connected at all. Force ignoring BIOS IRQ0 1479 * override in that cases. 1480 */ 1481 { 1482 .callback = dmi_ignore_irq0_timer_override, 1483 .ident = "HP nx6115 laptop", 1484 .matches = { 1485 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 1486 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6115"), 1487 }, 1488 }, 1489 { 1490 .callback = dmi_ignore_irq0_timer_override, 1491 .ident = "HP NX6125 laptop", 1492 .matches = { 1493 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 1494 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6125"), 1495 }, 1496 }, 1497 { 1498 .callback = dmi_ignore_irq0_timer_override, 1499 .ident = "HP NX6325 laptop", 1500 .matches = { 1501 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 1502 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6325"), 1503 }, 1504 }, 1505 { 1506 .callback = dmi_ignore_irq0_timer_override, 1507 .ident = "HP 6715b laptop", 1508 .matches = { 1509 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 1510 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq 6715b"), 1511 }, 1512 }, 1513 { 1514 .callback = dmi_ignore_irq0_timer_override, 1515 .ident = "FUJITSU SIEMENS", 1516 .matches = { 1517 DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"), 1518 DMI_MATCH(DMI_PRODUCT_NAME, "AMILO PRO V2030"), 1519 }, 1520 }, 1521 {} 1522 }; 1523 1524 /* 1525 * acpi_boot_table_init() and acpi_boot_init() 1526 * called from setup_arch(), always. 1527 * 1. checksums all tables 1528 * 2. enumerates lapics 1529 * 3. enumerates io-apics 1530 * 1531 * acpi_table_init() is separate to allow reading SRAT without 1532 * other side effects. 1533 * 1534 * side effects of acpi_boot_init: 1535 * acpi_lapic = 1 if LAPIC found 1536 * acpi_ioapic = 1 if IOAPIC found 1537 * if (acpi_lapic && acpi_ioapic) smp_found_config = 1; 1538 * if acpi_blacklisted() acpi_disabled = 1; 1539 * acpi_irq_model=... 1540 * ... 1541 */ 1542 1543 void __init acpi_boot_table_init(void) 1544 { 1545 dmi_check_system(acpi_dmi_table); 1546 1547 /* 1548 * If acpi_disabled, bail out 1549 */ 1550 if (acpi_disabled) 1551 return; 1552 1553 /* 1554 * Initialize the ACPI boot-time table parser. 1555 */ 1556 if (acpi_table_init()) { 1557 disable_acpi(); 1558 return; 1559 } 1560 1561 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf); 1562 1563 /* 1564 * blacklist may disable ACPI entirely 1565 */ 1566 if (acpi_blacklisted()) { 1567 if (acpi_force) { 1568 printk(KERN_WARNING PREFIX "acpi=force override\n"); 1569 } else { 1570 printk(KERN_WARNING PREFIX "Disabling ACPI support\n"); 1571 disable_acpi(); 1572 return; 1573 } 1574 } 1575 } 1576 1577 int __init early_acpi_boot_init(void) 1578 { 1579 /* 1580 * If acpi_disabled, bail out 1581 */ 1582 if (acpi_disabled) 1583 return 1; 1584 1585 /* 1586 * Process the Multiple APIC Description Table (MADT), if present 1587 */ 1588 early_acpi_process_madt(); 1589 1590 /* 1591 * Hardware-reduced ACPI mode initialization: 1592 */ 1593 acpi_reduced_hw_init(); 1594 1595 return 0; 1596 } 1597 1598 int __init acpi_boot_init(void) 1599 { 1600 /* those are executed after early-quirks are executed */ 1601 dmi_check_system(acpi_dmi_table_late); 1602 1603 /* 1604 * If acpi_disabled, bail out 1605 */ 1606 if (acpi_disabled) 1607 return 1; 1608 1609 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf); 1610 1611 /* 1612 * set sci_int and PM timer address 1613 */ 1614 acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt); 1615 1616 /* 1617 * Process the Multiple APIC Description Table (MADT), if present 1618 */ 1619 acpi_process_madt(); 1620 1621 acpi_table_parse(ACPI_SIG_HPET, acpi_parse_hpet); 1622 if (IS_ENABLED(CONFIG_ACPI_BGRT)) 1623 acpi_table_parse(ACPI_SIG_BGRT, acpi_parse_bgrt); 1624 1625 if (!acpi_noirq) 1626 x86_init.pci.init = pci_acpi_init; 1627 1628 /* Do not enable ACPI SPCR console by default */ 1629 acpi_parse_spcr(earlycon_acpi_spcr_enable, false); 1630 return 0; 1631 } 1632 1633 static int __init parse_acpi(char *arg) 1634 { 1635 if (!arg) 1636 return -EINVAL; 1637 1638 /* "acpi=off" disables both ACPI table parsing and interpreter */ 1639 if (strcmp(arg, "off") == 0) { 1640 disable_acpi(); 1641 } 1642 /* acpi=force to over-ride black-list */ 1643 else if (strcmp(arg, "force") == 0) { 1644 acpi_force = 1; 1645 acpi_disabled = 0; 1646 } 1647 /* acpi=strict disables out-of-spec workarounds */ 1648 else if (strcmp(arg, "strict") == 0) { 1649 acpi_strict = 1; 1650 } 1651 /* acpi=rsdt use RSDT instead of XSDT */ 1652 else if (strcmp(arg, "rsdt") == 0) { 1653 acpi_gbl_do_not_use_xsdt = TRUE; 1654 } 1655 /* "acpi=noirq" disables ACPI interrupt routing */ 1656 else if (strcmp(arg, "noirq") == 0) { 1657 acpi_noirq_set(); 1658 } 1659 /* "acpi=copy_dsdt" copys DSDT */ 1660 else if (strcmp(arg, "copy_dsdt") == 0) { 1661 acpi_gbl_copy_dsdt_locally = 1; 1662 } 1663 /* "acpi=nocmcff" disables FF mode for corrected errors */ 1664 else if (strcmp(arg, "nocmcff") == 0) { 1665 acpi_disable_cmcff = 1; 1666 } else { 1667 /* Core will printk when we return error. */ 1668 return -EINVAL; 1669 } 1670 return 0; 1671 } 1672 early_param("acpi", parse_acpi); 1673 1674 /* FIXME: Using pci= for an ACPI parameter is a travesty. */ 1675 static int __init parse_pci(char *arg) 1676 { 1677 if (arg && strcmp(arg, "noacpi") == 0) 1678 acpi_disable_pci(); 1679 return 0; 1680 } 1681 early_param("pci", parse_pci); 1682 1683 int __init acpi_mps_check(void) 1684 { 1685 #if defined(CONFIG_X86_LOCAL_APIC) && !defined(CONFIG_X86_MPPARSE) 1686 /* mptable code is not built-in*/ 1687 if (acpi_disabled || acpi_noirq) { 1688 printk(KERN_WARNING "MPS support code is not built-in.\n" 1689 "Using acpi=off or acpi=noirq or pci=noacpi " 1690 "may have problem\n"); 1691 return 1; 1692 } 1693 #endif 1694 return 0; 1695 } 1696 1697 #ifdef CONFIG_X86_IO_APIC 1698 static int __init parse_acpi_skip_timer_override(char *arg) 1699 { 1700 acpi_skip_timer_override = 1; 1701 return 0; 1702 } 1703 early_param("acpi_skip_timer_override", parse_acpi_skip_timer_override); 1704 1705 static int __init parse_acpi_use_timer_override(char *arg) 1706 { 1707 acpi_use_timer_override = 1; 1708 return 0; 1709 } 1710 early_param("acpi_use_timer_override", parse_acpi_use_timer_override); 1711 #endif /* CONFIG_X86_IO_APIC */ 1712 1713 static int __init setup_acpi_sci(char *s) 1714 { 1715 if (!s) 1716 return -EINVAL; 1717 if (!strcmp(s, "edge")) 1718 acpi_sci_flags = ACPI_MADT_TRIGGER_EDGE | 1719 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK); 1720 else if (!strcmp(s, "level")) 1721 acpi_sci_flags = ACPI_MADT_TRIGGER_LEVEL | 1722 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK); 1723 else if (!strcmp(s, "high")) 1724 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_HIGH | 1725 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK); 1726 else if (!strcmp(s, "low")) 1727 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_LOW | 1728 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK); 1729 else 1730 return -EINVAL; 1731 return 0; 1732 } 1733 early_param("acpi_sci", setup_acpi_sci); 1734 1735 int __acpi_acquire_global_lock(unsigned int *lock) 1736 { 1737 unsigned int old, new, val; 1738 do { 1739 old = *lock; 1740 new = (((old & ~0x3) + 2) + ((old >> 1) & 0x1)); 1741 val = cmpxchg(lock, old, new); 1742 } while (unlikely (val != old)); 1743 return (new < 3) ? -1 : 0; 1744 } 1745 1746 int __acpi_release_global_lock(unsigned int *lock) 1747 { 1748 unsigned int old, new, val; 1749 do { 1750 old = *lock; 1751 new = old & ~0x3; 1752 val = cmpxchg(lock, old, new); 1753 } while (unlikely (val != old)); 1754 return old & 0x1; 1755 } 1756 1757 void __init arch_reserve_mem_area(acpi_physical_address addr, size_t size) 1758 { 1759 e820__range_add(addr, size, E820_TYPE_ACPI); 1760 e820__update_table_print(); 1761 } 1762 1763 u64 x86_default_get_root_pointer(void) 1764 { 1765 return boot_params.acpi_rsdp_addr; 1766 } 1767