1 /* 2 * boot.c - Architecture-Specific Low-Level ACPI Boot Support 3 * 4 * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com> 5 * Copyright (C) 2001 Jun Nakajima <jun.nakajima@intel.com> 6 * 7 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 8 * 9 * This program is free software; you can redistribute it and/or modify 10 * it under the terms of the GNU General Public License as published by 11 * the Free Software Foundation; either version 2 of the License, or 12 * (at your option) any later version. 13 * 14 * This program is distributed in the hope that it will be useful, 15 * but WITHOUT ANY WARRANTY; without even the implied warranty of 16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 17 * GNU General Public License for more details. 18 * 19 * You should have received a copy of the GNU General Public License 20 * along with this program; if not, write to the Free Software 21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 22 * 23 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 24 */ 25 26 #include <linux/init.h> 27 #include <linux/acpi.h> 28 #include <linux/acpi_pmtmr.h> 29 #include <linux/efi.h> 30 #include <linux/cpumask.h> 31 #include <linux/export.h> 32 #include <linux/dmi.h> 33 #include <linux/irq.h> 34 #include <linux/slab.h> 35 #include <linux/bootmem.h> 36 #include <linux/ioport.h> 37 #include <linux/pci.h> 38 #include <linux/efi-bgrt.h> 39 40 #include <asm/e820/api.h> 41 #include <asm/irqdomain.h> 42 #include <asm/pci_x86.h> 43 #include <asm/pgtable.h> 44 #include <asm/io_apic.h> 45 #include <asm/apic.h> 46 #include <asm/io.h> 47 #include <asm/mpspec.h> 48 #include <asm/smp.h> 49 #include <asm/i8259.h> 50 51 #include "sleep.h" /* To include x86_acpi_suspend_lowlevel */ 52 static int __initdata acpi_force = 0; 53 int acpi_disabled; 54 EXPORT_SYMBOL(acpi_disabled); 55 56 #ifdef CONFIG_X86_64 57 # include <asm/proto.h> 58 #endif /* X86 */ 59 60 #define PREFIX "ACPI: " 61 62 int acpi_noirq; /* skip ACPI IRQ initialization */ 63 int acpi_pci_disabled; /* skip ACPI PCI scan and IRQ initialization */ 64 EXPORT_SYMBOL(acpi_pci_disabled); 65 66 int acpi_lapic; 67 int acpi_ioapic; 68 int acpi_strict; 69 int acpi_disable_cmcff; 70 71 u8 acpi_sci_flags __initdata; 72 int acpi_sci_override_gsi __initdata; 73 int acpi_skip_timer_override __initdata; 74 int acpi_use_timer_override __initdata; 75 int acpi_fix_pin2_polarity __initdata; 76 77 #ifdef CONFIG_X86_LOCAL_APIC 78 static u64 acpi_lapic_addr __initdata = APIC_DEFAULT_PHYS_BASE; 79 #endif 80 81 #ifdef CONFIG_X86_IO_APIC 82 /* 83 * Locks related to IOAPIC hotplug 84 * Hotplug side: 85 * ->device_hotplug_lock 86 * ->acpi_ioapic_lock 87 * ->ioapic_lock 88 * Interrupt mapping side: 89 * ->acpi_ioapic_lock 90 * ->ioapic_mutex 91 * ->ioapic_lock 92 */ 93 static DEFINE_MUTEX(acpi_ioapic_lock); 94 #endif 95 96 /* -------------------------------------------------------------------------- 97 Boot-time Configuration 98 -------------------------------------------------------------------------- */ 99 100 /* 101 * The default interrupt routing model is PIC (8259). This gets 102 * overridden if IOAPICs are enumerated (below). 103 */ 104 enum acpi_irq_model_id acpi_irq_model = ACPI_IRQ_MODEL_PIC; 105 106 107 /* 108 * ISA irqs by default are the first 16 gsis but can be 109 * any gsi as specified by an interrupt source override. 110 */ 111 static u32 isa_irq_to_gsi[NR_IRQS_LEGACY] __read_mostly = { 112 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 113 }; 114 115 #define ACPI_INVALID_GSI INT_MIN 116 117 /* 118 * This is just a simple wrapper around early_memremap(), 119 * with sanity checks for phys == 0 and size == 0. 120 */ 121 void __init __iomem *__acpi_map_table(unsigned long phys, unsigned long size) 122 { 123 124 if (!phys || !size) 125 return NULL; 126 127 return early_memremap(phys, size); 128 } 129 130 void __init __acpi_unmap_table(void __iomem *map, unsigned long size) 131 { 132 if (!map || !size) 133 return; 134 135 early_memunmap(map, size); 136 } 137 138 #ifdef CONFIG_X86_LOCAL_APIC 139 static int __init acpi_parse_madt(struct acpi_table_header *table) 140 { 141 struct acpi_table_madt *madt = NULL; 142 143 if (!boot_cpu_has(X86_FEATURE_APIC)) 144 return -EINVAL; 145 146 madt = (struct acpi_table_madt *)table; 147 if (!madt) { 148 printk(KERN_WARNING PREFIX "Unable to map MADT\n"); 149 return -ENODEV; 150 } 151 152 if (madt->address) { 153 acpi_lapic_addr = (u64) madt->address; 154 155 printk(KERN_DEBUG PREFIX "Local APIC address 0x%08x\n", 156 madt->address); 157 } 158 159 default_acpi_madt_oem_check(madt->header.oem_id, 160 madt->header.oem_table_id); 161 162 return 0; 163 } 164 165 /** 166 * acpi_register_lapic - register a local apic and generates a logic cpu number 167 * @id: local apic id to register 168 * @acpiid: ACPI id to register 169 * @enabled: this cpu is enabled or not 170 * 171 * Returns the logic cpu number which maps to the local apic 172 */ 173 static int acpi_register_lapic(int id, u32 acpiid, u8 enabled) 174 { 175 unsigned int ver = 0; 176 int cpu; 177 178 if (id >= MAX_LOCAL_APIC) { 179 printk(KERN_INFO PREFIX "skipped apicid that is too big\n"); 180 return -EINVAL; 181 } 182 183 if (!enabled) { 184 ++disabled_cpus; 185 return -EINVAL; 186 } 187 188 if (boot_cpu_physical_apicid != -1U) 189 ver = boot_cpu_apic_version; 190 191 cpu = generic_processor_info(id, ver); 192 if (cpu >= 0) 193 early_per_cpu(x86_cpu_to_acpiid, cpu) = acpiid; 194 195 return cpu; 196 } 197 198 static int __init 199 acpi_parse_x2apic(struct acpi_subtable_header *header, const unsigned long end) 200 { 201 struct acpi_madt_local_x2apic *processor = NULL; 202 #ifdef CONFIG_X86_X2APIC 203 int apic_id; 204 u8 enabled; 205 #endif 206 207 processor = (struct acpi_madt_local_x2apic *)header; 208 209 if (BAD_MADT_ENTRY(processor, end)) 210 return -EINVAL; 211 212 acpi_table_print_madt_entry(header); 213 214 #ifdef CONFIG_X86_X2APIC 215 apic_id = processor->local_apic_id; 216 enabled = processor->lapic_flags & ACPI_MADT_ENABLED; 217 218 /* 219 * We need to register disabled CPU as well to permit 220 * counting disabled CPUs. This allows us to size 221 * cpus_possible_map more accurately, to permit 222 * to not preallocating memory for all NR_CPUS 223 * when we use CPU hotplug. 224 */ 225 if (!apic->apic_id_valid(apic_id) && enabled) 226 printk(KERN_WARNING PREFIX "x2apic entry ignored\n"); 227 else 228 acpi_register_lapic(apic_id, processor->uid, enabled); 229 #else 230 printk(KERN_WARNING PREFIX "x2apic entry ignored\n"); 231 #endif 232 233 return 0; 234 } 235 236 static int __init 237 acpi_parse_lapic(struct acpi_subtable_header * header, const unsigned long end) 238 { 239 struct acpi_madt_local_apic *processor = NULL; 240 241 processor = (struct acpi_madt_local_apic *)header; 242 243 if (BAD_MADT_ENTRY(processor, end)) 244 return -EINVAL; 245 246 acpi_table_print_madt_entry(header); 247 248 /* Ignore invalid ID */ 249 if (processor->id == 0xff) 250 return 0; 251 252 /* 253 * We need to register disabled CPU as well to permit 254 * counting disabled CPUs. This allows us to size 255 * cpus_possible_map more accurately, to permit 256 * to not preallocating memory for all NR_CPUS 257 * when we use CPU hotplug. 258 */ 259 acpi_register_lapic(processor->id, /* APIC ID */ 260 processor->processor_id, /* ACPI ID */ 261 processor->lapic_flags & ACPI_MADT_ENABLED); 262 263 return 0; 264 } 265 266 static int __init 267 acpi_parse_sapic(struct acpi_subtable_header *header, const unsigned long end) 268 { 269 struct acpi_madt_local_sapic *processor = NULL; 270 271 processor = (struct acpi_madt_local_sapic *)header; 272 273 if (BAD_MADT_ENTRY(processor, end)) 274 return -EINVAL; 275 276 acpi_table_print_madt_entry(header); 277 278 acpi_register_lapic((processor->id << 8) | processor->eid,/* APIC ID */ 279 processor->processor_id, /* ACPI ID */ 280 processor->lapic_flags & ACPI_MADT_ENABLED); 281 282 return 0; 283 } 284 285 static int __init 286 acpi_parse_lapic_addr_ovr(struct acpi_subtable_header * header, 287 const unsigned long end) 288 { 289 struct acpi_madt_local_apic_override *lapic_addr_ovr = NULL; 290 291 lapic_addr_ovr = (struct acpi_madt_local_apic_override *)header; 292 293 if (BAD_MADT_ENTRY(lapic_addr_ovr, end)) 294 return -EINVAL; 295 296 acpi_table_print_madt_entry(header); 297 298 acpi_lapic_addr = lapic_addr_ovr->address; 299 300 return 0; 301 } 302 303 static int __init 304 acpi_parse_x2apic_nmi(struct acpi_subtable_header *header, 305 const unsigned long end) 306 { 307 struct acpi_madt_local_x2apic_nmi *x2apic_nmi = NULL; 308 309 x2apic_nmi = (struct acpi_madt_local_x2apic_nmi *)header; 310 311 if (BAD_MADT_ENTRY(x2apic_nmi, end)) 312 return -EINVAL; 313 314 acpi_table_print_madt_entry(header); 315 316 if (x2apic_nmi->lint != 1) 317 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n"); 318 319 return 0; 320 } 321 322 static int __init 323 acpi_parse_lapic_nmi(struct acpi_subtable_header * header, const unsigned long end) 324 { 325 struct acpi_madt_local_apic_nmi *lapic_nmi = NULL; 326 327 lapic_nmi = (struct acpi_madt_local_apic_nmi *)header; 328 329 if (BAD_MADT_ENTRY(lapic_nmi, end)) 330 return -EINVAL; 331 332 acpi_table_print_madt_entry(header); 333 334 if (lapic_nmi->lint != 1) 335 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n"); 336 337 return 0; 338 } 339 340 #endif /*CONFIG_X86_LOCAL_APIC */ 341 342 #ifdef CONFIG_X86_IO_APIC 343 #define MP_ISA_BUS 0 344 345 static void __init mp_override_legacy_irq(u8 bus_irq, u8 polarity, u8 trigger, 346 u32 gsi) 347 { 348 int ioapic; 349 int pin; 350 struct mpc_intsrc mp_irq; 351 352 /* 353 * Check bus_irq boundary. 354 */ 355 if (bus_irq >= NR_IRQS_LEGACY) { 356 pr_warn("Invalid bus_irq %u for legacy override\n", bus_irq); 357 return; 358 } 359 360 /* 361 * Convert 'gsi' to 'ioapic.pin'. 362 */ 363 ioapic = mp_find_ioapic(gsi); 364 if (ioapic < 0) 365 return; 366 pin = mp_find_ioapic_pin(ioapic, gsi); 367 368 /* 369 * TBD: This check is for faulty timer entries, where the override 370 * erroneously sets the trigger to level, resulting in a HUGE 371 * increase of timer interrupts! 372 */ 373 if ((bus_irq == 0) && (trigger == 3)) 374 trigger = 1; 375 376 mp_irq.type = MP_INTSRC; 377 mp_irq.irqtype = mp_INT; 378 mp_irq.irqflag = (trigger << 2) | polarity; 379 mp_irq.srcbus = MP_ISA_BUS; 380 mp_irq.srcbusirq = bus_irq; /* IRQ */ 381 mp_irq.dstapic = mpc_ioapic_id(ioapic); /* APIC ID */ 382 mp_irq.dstirq = pin; /* INTIN# */ 383 384 mp_save_irq(&mp_irq); 385 386 /* 387 * Reset default identity mapping if gsi is also an legacy IRQ, 388 * otherwise there will be more than one entry with the same GSI 389 * and acpi_isa_irq_to_gsi() may give wrong result. 390 */ 391 if (gsi < nr_legacy_irqs() && isa_irq_to_gsi[gsi] == gsi) 392 isa_irq_to_gsi[gsi] = ACPI_INVALID_GSI; 393 isa_irq_to_gsi[bus_irq] = gsi; 394 } 395 396 static int mp_config_acpi_gsi(struct device *dev, u32 gsi, int trigger, 397 int polarity) 398 { 399 #ifdef CONFIG_X86_MPPARSE 400 struct mpc_intsrc mp_irq; 401 struct pci_dev *pdev; 402 unsigned char number; 403 unsigned int devfn; 404 int ioapic; 405 u8 pin; 406 407 if (!acpi_ioapic) 408 return 0; 409 if (!dev || !dev_is_pci(dev)) 410 return 0; 411 412 pdev = to_pci_dev(dev); 413 number = pdev->bus->number; 414 devfn = pdev->devfn; 415 pin = pdev->pin; 416 /* print the entry should happen on mptable identically */ 417 mp_irq.type = MP_INTSRC; 418 mp_irq.irqtype = mp_INT; 419 mp_irq.irqflag = (trigger == ACPI_EDGE_SENSITIVE ? 4 : 0x0c) | 420 (polarity == ACPI_ACTIVE_HIGH ? 1 : 3); 421 mp_irq.srcbus = number; 422 mp_irq.srcbusirq = (((devfn >> 3) & 0x1f) << 2) | ((pin - 1) & 3); 423 ioapic = mp_find_ioapic(gsi); 424 mp_irq.dstapic = mpc_ioapic_id(ioapic); 425 mp_irq.dstirq = mp_find_ioapic_pin(ioapic, gsi); 426 427 mp_save_irq(&mp_irq); 428 #endif 429 return 0; 430 } 431 432 static int __init 433 acpi_parse_ioapic(struct acpi_subtable_header * header, const unsigned long end) 434 { 435 struct acpi_madt_io_apic *ioapic = NULL; 436 struct ioapic_domain_cfg cfg = { 437 .type = IOAPIC_DOMAIN_DYNAMIC, 438 .ops = &mp_ioapic_irqdomain_ops, 439 }; 440 441 ioapic = (struct acpi_madt_io_apic *)header; 442 443 if (BAD_MADT_ENTRY(ioapic, end)) 444 return -EINVAL; 445 446 acpi_table_print_madt_entry(header); 447 448 /* Statically assign IRQ numbers for IOAPICs hosting legacy IRQs */ 449 if (ioapic->global_irq_base < nr_legacy_irqs()) 450 cfg.type = IOAPIC_DOMAIN_LEGACY; 451 452 mp_register_ioapic(ioapic->id, ioapic->address, ioapic->global_irq_base, 453 &cfg); 454 455 return 0; 456 } 457 458 /* 459 * Parse Interrupt Source Override for the ACPI SCI 460 */ 461 static void __init acpi_sci_ioapic_setup(u8 bus_irq, u16 polarity, u16 trigger, u32 gsi) 462 { 463 if (trigger == 0) /* compatible SCI trigger is level */ 464 trigger = 3; 465 466 if (polarity == 0) /* compatible SCI polarity is low */ 467 polarity = 3; 468 469 /* Command-line over-ride via acpi_sci= */ 470 if (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) 471 trigger = (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2; 472 473 if (acpi_sci_flags & ACPI_MADT_POLARITY_MASK) 474 polarity = acpi_sci_flags & ACPI_MADT_POLARITY_MASK; 475 476 mp_override_legacy_irq(bus_irq, polarity, trigger, gsi); 477 acpi_penalize_sci_irq(bus_irq, trigger, polarity); 478 479 /* 480 * stash over-ride to indicate we've been here 481 * and for later update of acpi_gbl_FADT 482 */ 483 acpi_sci_override_gsi = gsi; 484 return; 485 } 486 487 static int __init 488 acpi_parse_int_src_ovr(struct acpi_subtable_header * header, 489 const unsigned long end) 490 { 491 struct acpi_madt_interrupt_override *intsrc = NULL; 492 493 intsrc = (struct acpi_madt_interrupt_override *)header; 494 495 if (BAD_MADT_ENTRY(intsrc, end)) 496 return -EINVAL; 497 498 acpi_table_print_madt_entry(header); 499 500 if (intsrc->source_irq == acpi_gbl_FADT.sci_interrupt) { 501 acpi_sci_ioapic_setup(intsrc->source_irq, 502 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK, 503 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2, 504 intsrc->global_irq); 505 return 0; 506 } 507 508 if (intsrc->source_irq == 0) { 509 if (acpi_skip_timer_override) { 510 printk(PREFIX "BIOS IRQ0 override ignored.\n"); 511 return 0; 512 } 513 514 if ((intsrc->global_irq == 2) && acpi_fix_pin2_polarity 515 && (intsrc->inti_flags & ACPI_MADT_POLARITY_MASK)) { 516 intsrc->inti_flags &= ~ACPI_MADT_POLARITY_MASK; 517 printk(PREFIX "BIOS IRQ0 pin2 override: forcing polarity to high active.\n"); 518 } 519 } 520 521 mp_override_legacy_irq(intsrc->source_irq, 522 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK, 523 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2, 524 intsrc->global_irq); 525 526 return 0; 527 } 528 529 static int __init 530 acpi_parse_nmi_src(struct acpi_subtable_header * header, const unsigned long end) 531 { 532 struct acpi_madt_nmi_source *nmi_src = NULL; 533 534 nmi_src = (struct acpi_madt_nmi_source *)header; 535 536 if (BAD_MADT_ENTRY(nmi_src, end)) 537 return -EINVAL; 538 539 acpi_table_print_madt_entry(header); 540 541 /* TBD: Support nimsrc entries? */ 542 543 return 0; 544 } 545 546 #endif /* CONFIG_X86_IO_APIC */ 547 548 /* 549 * acpi_pic_sci_set_trigger() 550 * 551 * use ELCR to set PIC-mode trigger type for SCI 552 * 553 * If a PIC-mode SCI is not recognized or gives spurious IRQ7's 554 * it may require Edge Trigger -- use "acpi_sci=edge" 555 * 556 * Port 0x4d0-4d1 are ECLR1 and ECLR2, the Edge/Level Control Registers 557 * for the 8259 PIC. bit[n] = 1 means irq[n] is Level, otherwise Edge. 558 * ECLR1 is IRQs 0-7 (IRQ 0, 1, 2 must be 0) 559 * ECLR2 is IRQs 8-15 (IRQ 8, 13 must be 0) 560 */ 561 562 void __init acpi_pic_sci_set_trigger(unsigned int irq, u16 trigger) 563 { 564 unsigned int mask = 1 << irq; 565 unsigned int old, new; 566 567 /* Real old ELCR mask */ 568 old = inb(0x4d0) | (inb(0x4d1) << 8); 569 570 /* 571 * If we use ACPI to set PCI IRQs, then we should clear ELCR 572 * since we will set it correctly as we enable the PCI irq 573 * routing. 574 */ 575 new = acpi_noirq ? old : 0; 576 577 /* 578 * Update SCI information in the ELCR, it isn't in the PCI 579 * routing tables.. 580 */ 581 switch (trigger) { 582 case 1: /* Edge - clear */ 583 new &= ~mask; 584 break; 585 case 3: /* Level - set */ 586 new |= mask; 587 break; 588 } 589 590 if (old == new) 591 return; 592 593 printk(PREFIX "setting ELCR to %04x (from %04x)\n", new, old); 594 outb(new, 0x4d0); 595 outb(new >> 8, 0x4d1); 596 } 597 598 int acpi_gsi_to_irq(u32 gsi, unsigned int *irqp) 599 { 600 int rc, irq, trigger, polarity; 601 602 if (acpi_irq_model == ACPI_IRQ_MODEL_PIC) { 603 *irqp = gsi; 604 return 0; 605 } 606 607 rc = acpi_get_override_irq(gsi, &trigger, &polarity); 608 if (rc == 0) { 609 trigger = trigger ? ACPI_LEVEL_SENSITIVE : ACPI_EDGE_SENSITIVE; 610 polarity = polarity ? ACPI_ACTIVE_LOW : ACPI_ACTIVE_HIGH; 611 irq = acpi_register_gsi(NULL, gsi, trigger, polarity); 612 if (irq >= 0) { 613 *irqp = irq; 614 return 0; 615 } 616 } 617 618 return -1; 619 } 620 EXPORT_SYMBOL_GPL(acpi_gsi_to_irq); 621 622 int acpi_isa_irq_to_gsi(unsigned isa_irq, u32 *gsi) 623 { 624 if (isa_irq < nr_legacy_irqs() && 625 isa_irq_to_gsi[isa_irq] != ACPI_INVALID_GSI) { 626 *gsi = isa_irq_to_gsi[isa_irq]; 627 return 0; 628 } 629 630 return -1; 631 } 632 633 static int acpi_register_gsi_pic(struct device *dev, u32 gsi, 634 int trigger, int polarity) 635 { 636 #ifdef CONFIG_PCI 637 /* 638 * Make sure all (legacy) PCI IRQs are set as level-triggered. 639 */ 640 if (trigger == ACPI_LEVEL_SENSITIVE) 641 elcr_set_level_irq(gsi); 642 #endif 643 644 return gsi; 645 } 646 647 #ifdef CONFIG_X86_LOCAL_APIC 648 static int acpi_register_gsi_ioapic(struct device *dev, u32 gsi, 649 int trigger, int polarity) 650 { 651 int irq = gsi; 652 #ifdef CONFIG_X86_IO_APIC 653 int node; 654 struct irq_alloc_info info; 655 656 node = dev ? dev_to_node(dev) : NUMA_NO_NODE; 657 trigger = trigger == ACPI_EDGE_SENSITIVE ? 0 : 1; 658 polarity = polarity == ACPI_ACTIVE_HIGH ? 0 : 1; 659 ioapic_set_alloc_attr(&info, node, trigger, polarity); 660 661 mutex_lock(&acpi_ioapic_lock); 662 irq = mp_map_gsi_to_irq(gsi, IOAPIC_MAP_ALLOC, &info); 663 /* Don't set up the ACPI SCI because it's already set up */ 664 if (irq >= 0 && enable_update_mptable && 665 acpi_gbl_FADT.sci_interrupt != gsi) 666 mp_config_acpi_gsi(dev, gsi, trigger, polarity); 667 mutex_unlock(&acpi_ioapic_lock); 668 #endif 669 670 return irq; 671 } 672 673 static void acpi_unregister_gsi_ioapic(u32 gsi) 674 { 675 #ifdef CONFIG_X86_IO_APIC 676 int irq; 677 678 mutex_lock(&acpi_ioapic_lock); 679 irq = mp_map_gsi_to_irq(gsi, 0, NULL); 680 if (irq > 0) 681 mp_unmap_irq(irq); 682 mutex_unlock(&acpi_ioapic_lock); 683 #endif 684 } 685 #endif 686 687 int (*__acpi_register_gsi)(struct device *dev, u32 gsi, 688 int trigger, int polarity) = acpi_register_gsi_pic; 689 void (*__acpi_unregister_gsi)(u32 gsi) = NULL; 690 691 #ifdef CONFIG_ACPI_SLEEP 692 int (*acpi_suspend_lowlevel)(void) = x86_acpi_suspend_lowlevel; 693 #else 694 int (*acpi_suspend_lowlevel)(void); 695 #endif 696 697 /* 698 * success: return IRQ number (>=0) 699 * failure: return < 0 700 */ 701 int acpi_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity) 702 { 703 return __acpi_register_gsi(dev, gsi, trigger, polarity); 704 } 705 EXPORT_SYMBOL_GPL(acpi_register_gsi); 706 707 void acpi_unregister_gsi(u32 gsi) 708 { 709 if (__acpi_unregister_gsi) 710 __acpi_unregister_gsi(gsi); 711 } 712 EXPORT_SYMBOL_GPL(acpi_unregister_gsi); 713 714 #ifdef CONFIG_X86_LOCAL_APIC 715 static void __init acpi_set_irq_model_ioapic(void) 716 { 717 acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC; 718 __acpi_register_gsi = acpi_register_gsi_ioapic; 719 __acpi_unregister_gsi = acpi_unregister_gsi_ioapic; 720 acpi_ioapic = 1; 721 } 722 #endif 723 724 /* 725 * ACPI based hotplug support for CPU 726 */ 727 #ifdef CONFIG_ACPI_HOTPLUG_CPU 728 #include <acpi/processor.h> 729 730 static int acpi_map_cpu2node(acpi_handle handle, int cpu, int physid) 731 { 732 #ifdef CONFIG_ACPI_NUMA 733 int nid; 734 735 nid = acpi_get_node(handle); 736 if (nid != NUMA_NO_NODE) { 737 set_apicid_to_node(physid, nid); 738 numa_set_node(cpu, nid); 739 } 740 #endif 741 return 0; 742 } 743 744 int acpi_map_cpu(acpi_handle handle, phys_cpuid_t physid, u32 acpi_id, 745 int *pcpu) 746 { 747 int cpu; 748 749 cpu = acpi_register_lapic(physid, acpi_id, ACPI_MADT_ENABLED); 750 if (cpu < 0) { 751 pr_info(PREFIX "Unable to map lapic to logical cpu number\n"); 752 return cpu; 753 } 754 755 acpi_processor_set_pdc(handle); 756 acpi_map_cpu2node(handle, cpu, physid); 757 758 *pcpu = cpu; 759 return 0; 760 } 761 EXPORT_SYMBOL(acpi_map_cpu); 762 763 int acpi_unmap_cpu(int cpu) 764 { 765 #ifdef CONFIG_ACPI_NUMA 766 set_apicid_to_node(per_cpu(x86_cpu_to_apicid, cpu), NUMA_NO_NODE); 767 #endif 768 769 per_cpu(x86_cpu_to_apicid, cpu) = -1; 770 set_cpu_present(cpu, false); 771 num_processors--; 772 773 return (0); 774 } 775 EXPORT_SYMBOL(acpi_unmap_cpu); 776 #endif /* CONFIG_ACPI_HOTPLUG_CPU */ 777 778 int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base) 779 { 780 int ret = -ENOSYS; 781 #ifdef CONFIG_ACPI_HOTPLUG_IOAPIC 782 int ioapic_id; 783 u64 addr; 784 struct ioapic_domain_cfg cfg = { 785 .type = IOAPIC_DOMAIN_DYNAMIC, 786 .ops = &mp_ioapic_irqdomain_ops, 787 }; 788 789 ioapic_id = acpi_get_ioapic_id(handle, gsi_base, &addr); 790 if (ioapic_id < 0) { 791 unsigned long long uid; 792 acpi_status status; 793 794 status = acpi_evaluate_integer(handle, METHOD_NAME__UID, 795 NULL, &uid); 796 if (ACPI_FAILURE(status)) { 797 acpi_handle_warn(handle, "failed to get IOAPIC ID.\n"); 798 return -EINVAL; 799 } 800 ioapic_id = (int)uid; 801 } 802 803 mutex_lock(&acpi_ioapic_lock); 804 ret = mp_register_ioapic(ioapic_id, phys_addr, gsi_base, &cfg); 805 mutex_unlock(&acpi_ioapic_lock); 806 #endif 807 808 return ret; 809 } 810 EXPORT_SYMBOL(acpi_register_ioapic); 811 812 int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base) 813 { 814 int ret = -ENOSYS; 815 816 #ifdef CONFIG_ACPI_HOTPLUG_IOAPIC 817 mutex_lock(&acpi_ioapic_lock); 818 ret = mp_unregister_ioapic(gsi_base); 819 mutex_unlock(&acpi_ioapic_lock); 820 #endif 821 822 return ret; 823 } 824 EXPORT_SYMBOL(acpi_unregister_ioapic); 825 826 /** 827 * acpi_ioapic_registered - Check whether IOAPIC assoicatied with @gsi_base 828 * has been registered 829 * @handle: ACPI handle of the IOAPIC deivce 830 * @gsi_base: GSI base associated with the IOAPIC 831 * 832 * Assume caller holds some type of lock to serialize acpi_ioapic_registered() 833 * with acpi_register_ioapic()/acpi_unregister_ioapic(). 834 */ 835 int acpi_ioapic_registered(acpi_handle handle, u32 gsi_base) 836 { 837 int ret = 0; 838 839 #ifdef CONFIG_ACPI_HOTPLUG_IOAPIC 840 mutex_lock(&acpi_ioapic_lock); 841 ret = mp_ioapic_registered(gsi_base); 842 mutex_unlock(&acpi_ioapic_lock); 843 #endif 844 845 return ret; 846 } 847 848 static int __init acpi_parse_sbf(struct acpi_table_header *table) 849 { 850 struct acpi_table_boot *sb = (struct acpi_table_boot *)table; 851 852 sbf_port = sb->cmos_index; /* Save CMOS port */ 853 854 return 0; 855 } 856 857 #ifdef CONFIG_HPET_TIMER 858 #include <asm/hpet.h> 859 860 static struct resource *hpet_res __initdata; 861 862 static int __init acpi_parse_hpet(struct acpi_table_header *table) 863 { 864 struct acpi_table_hpet *hpet_tbl = (struct acpi_table_hpet *)table; 865 866 if (hpet_tbl->address.space_id != ACPI_SPACE_MEM) { 867 printk(KERN_WARNING PREFIX "HPET timers must be located in " 868 "memory.\n"); 869 return -1; 870 } 871 872 hpet_address = hpet_tbl->address.address; 873 hpet_blockid = hpet_tbl->sequence; 874 875 /* 876 * Some broken BIOSes advertise HPET at 0x0. We really do not 877 * want to allocate a resource there. 878 */ 879 if (!hpet_address) { 880 printk(KERN_WARNING PREFIX 881 "HPET id: %#x base: %#lx is invalid\n", 882 hpet_tbl->id, hpet_address); 883 return 0; 884 } 885 #ifdef CONFIG_X86_64 886 /* 887 * Some even more broken BIOSes advertise HPET at 888 * 0xfed0000000000000 instead of 0xfed00000. Fix it up and add 889 * some noise: 890 */ 891 if (hpet_address == 0xfed0000000000000UL) { 892 if (!hpet_force_user) { 893 printk(KERN_WARNING PREFIX "HPET id: %#x " 894 "base: 0xfed0000000000000 is bogus\n " 895 "try hpet=force on the kernel command line to " 896 "fix it up to 0xfed00000.\n", hpet_tbl->id); 897 hpet_address = 0; 898 return 0; 899 } 900 printk(KERN_WARNING PREFIX 901 "HPET id: %#x base: 0xfed0000000000000 fixed up " 902 "to 0xfed00000.\n", hpet_tbl->id); 903 hpet_address >>= 32; 904 } 905 #endif 906 printk(KERN_INFO PREFIX "HPET id: %#x base: %#lx\n", 907 hpet_tbl->id, hpet_address); 908 909 /* 910 * Allocate and initialize the HPET firmware resource for adding into 911 * the resource tree during the lateinit timeframe. 912 */ 913 #define HPET_RESOURCE_NAME_SIZE 9 914 hpet_res = alloc_bootmem(sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE); 915 916 hpet_res->name = (void *)&hpet_res[1]; 917 hpet_res->flags = IORESOURCE_MEM; 918 snprintf((char *)hpet_res->name, HPET_RESOURCE_NAME_SIZE, "HPET %u", 919 hpet_tbl->sequence); 920 921 hpet_res->start = hpet_address; 922 hpet_res->end = hpet_address + (1 * 1024) - 1; 923 924 return 0; 925 } 926 927 /* 928 * hpet_insert_resource inserts the HPET resources used into the resource 929 * tree. 930 */ 931 static __init int hpet_insert_resource(void) 932 { 933 if (!hpet_res) 934 return 1; 935 936 return insert_resource(&iomem_resource, hpet_res); 937 } 938 939 late_initcall(hpet_insert_resource); 940 941 #else 942 #define acpi_parse_hpet NULL 943 #endif 944 945 static int __init acpi_parse_fadt(struct acpi_table_header *table) 946 { 947 if (!(acpi_gbl_FADT.boot_flags & ACPI_FADT_LEGACY_DEVICES)) { 948 pr_debug("ACPI: no legacy devices present\n"); 949 x86_platform.legacy.devices.pnpbios = 0; 950 } 951 952 if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID && 953 !(acpi_gbl_FADT.boot_flags & ACPI_FADT_8042) && 954 x86_platform.legacy.i8042 != X86_LEGACY_I8042_PLATFORM_ABSENT) { 955 pr_debug("ACPI: i8042 controller is absent\n"); 956 x86_platform.legacy.i8042 = X86_LEGACY_I8042_FIRMWARE_ABSENT; 957 } 958 959 if (acpi_gbl_FADT.boot_flags & ACPI_FADT_NO_CMOS_RTC) { 960 pr_debug("ACPI: not registering RTC platform device\n"); 961 x86_platform.legacy.rtc = 0; 962 } 963 964 #ifdef CONFIG_X86_PM_TIMER 965 /* detect the location of the ACPI PM Timer */ 966 if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID) { 967 /* FADT rev. 2 */ 968 if (acpi_gbl_FADT.xpm_timer_block.space_id != 969 ACPI_ADR_SPACE_SYSTEM_IO) 970 return 0; 971 972 pmtmr_ioport = acpi_gbl_FADT.xpm_timer_block.address; 973 /* 974 * "X" fields are optional extensions to the original V1.0 975 * fields, so we must selectively expand V1.0 fields if the 976 * corresponding X field is zero. 977 */ 978 if (!pmtmr_ioport) 979 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block; 980 } else { 981 /* FADT rev. 1 */ 982 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block; 983 } 984 if (pmtmr_ioport) 985 printk(KERN_INFO PREFIX "PM-Timer IO Port: %#x\n", 986 pmtmr_ioport); 987 #endif 988 return 0; 989 } 990 991 #ifdef CONFIG_X86_LOCAL_APIC 992 /* 993 * Parse LAPIC entries in MADT 994 * returns 0 on success, < 0 on error 995 */ 996 997 static int __init early_acpi_parse_madt_lapic_addr_ovr(void) 998 { 999 int count; 1000 1001 if (!boot_cpu_has(X86_FEATURE_APIC)) 1002 return -ENODEV; 1003 1004 /* 1005 * Note that the LAPIC address is obtained from the MADT (32-bit value) 1006 * and (optionally) overridden by a LAPIC_ADDR_OVR entry (64-bit value). 1007 */ 1008 1009 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE, 1010 acpi_parse_lapic_addr_ovr, 0); 1011 if (count < 0) { 1012 printk(KERN_ERR PREFIX 1013 "Error parsing LAPIC address override entry\n"); 1014 return count; 1015 } 1016 1017 register_lapic_address(acpi_lapic_addr); 1018 1019 return count; 1020 } 1021 1022 static int __init acpi_parse_madt_lapic_entries(void) 1023 { 1024 int count; 1025 int x2count = 0; 1026 int ret; 1027 struct acpi_subtable_proc madt_proc[2]; 1028 1029 if (!boot_cpu_has(X86_FEATURE_APIC)) 1030 return -ENODEV; 1031 1032 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC, 1033 acpi_parse_sapic, MAX_LOCAL_APIC); 1034 1035 if (!count) { 1036 memset(madt_proc, 0, sizeof(madt_proc)); 1037 madt_proc[0].id = ACPI_MADT_TYPE_LOCAL_APIC; 1038 madt_proc[0].handler = acpi_parse_lapic; 1039 madt_proc[1].id = ACPI_MADT_TYPE_LOCAL_X2APIC; 1040 madt_proc[1].handler = acpi_parse_x2apic; 1041 ret = acpi_table_parse_entries_array(ACPI_SIG_MADT, 1042 sizeof(struct acpi_table_madt), 1043 madt_proc, ARRAY_SIZE(madt_proc), MAX_LOCAL_APIC); 1044 if (ret < 0) { 1045 printk(KERN_ERR PREFIX 1046 "Error parsing LAPIC/X2APIC entries\n"); 1047 return ret; 1048 } 1049 1050 count = madt_proc[0].count; 1051 x2count = madt_proc[1].count; 1052 } 1053 if (!count && !x2count) { 1054 printk(KERN_ERR PREFIX "No LAPIC entries present\n"); 1055 /* TBD: Cleanup to allow fallback to MPS */ 1056 return -ENODEV; 1057 } else if (count < 0 || x2count < 0) { 1058 printk(KERN_ERR PREFIX "Error parsing LAPIC entry\n"); 1059 /* TBD: Cleanup to allow fallback to MPS */ 1060 return count; 1061 } 1062 1063 x2count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC_NMI, 1064 acpi_parse_x2apic_nmi, 0); 1065 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI, 1066 acpi_parse_lapic_nmi, 0); 1067 if (count < 0 || x2count < 0) { 1068 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n"); 1069 /* TBD: Cleanup to allow fallback to MPS */ 1070 return count; 1071 } 1072 return 0; 1073 } 1074 #endif /* CONFIG_X86_LOCAL_APIC */ 1075 1076 #ifdef CONFIG_X86_IO_APIC 1077 static void __init mp_config_acpi_legacy_irqs(void) 1078 { 1079 int i; 1080 struct mpc_intsrc mp_irq; 1081 1082 #ifdef CONFIG_EISA 1083 /* 1084 * Fabricate the legacy ISA bus (bus #31). 1085 */ 1086 mp_bus_id_to_type[MP_ISA_BUS] = MP_BUS_ISA; 1087 #endif 1088 set_bit(MP_ISA_BUS, mp_bus_not_pci); 1089 pr_debug("Bus #%d is ISA (nIRQs: %d)\n", MP_ISA_BUS, nr_legacy_irqs()); 1090 1091 /* 1092 * Use the default configuration for the IRQs 0-15. Unless 1093 * overridden by (MADT) interrupt source override entries. 1094 */ 1095 for (i = 0; i < nr_legacy_irqs(); i++) { 1096 int ioapic, pin; 1097 unsigned int dstapic; 1098 int idx; 1099 u32 gsi; 1100 1101 /* Locate the gsi that irq i maps to. */ 1102 if (acpi_isa_irq_to_gsi(i, &gsi)) 1103 continue; 1104 1105 /* 1106 * Locate the IOAPIC that manages the ISA IRQ. 1107 */ 1108 ioapic = mp_find_ioapic(gsi); 1109 if (ioapic < 0) 1110 continue; 1111 pin = mp_find_ioapic_pin(ioapic, gsi); 1112 dstapic = mpc_ioapic_id(ioapic); 1113 1114 for (idx = 0; idx < mp_irq_entries; idx++) { 1115 struct mpc_intsrc *irq = mp_irqs + idx; 1116 1117 /* Do we already have a mapping for this ISA IRQ? */ 1118 if (irq->srcbus == MP_ISA_BUS && irq->srcbusirq == i) 1119 break; 1120 1121 /* Do we already have a mapping for this IOAPIC pin */ 1122 if (irq->dstapic == dstapic && irq->dstirq == pin) 1123 break; 1124 } 1125 1126 if (idx != mp_irq_entries) { 1127 printk(KERN_DEBUG "ACPI: IRQ%d used by override.\n", i); 1128 continue; /* IRQ already used */ 1129 } 1130 1131 mp_irq.type = MP_INTSRC; 1132 mp_irq.irqflag = 0; /* Conforming */ 1133 mp_irq.srcbus = MP_ISA_BUS; 1134 mp_irq.dstapic = dstapic; 1135 mp_irq.irqtype = mp_INT; 1136 mp_irq.srcbusirq = i; /* Identity mapped */ 1137 mp_irq.dstirq = pin; 1138 1139 mp_save_irq(&mp_irq); 1140 } 1141 } 1142 1143 /* 1144 * Parse IOAPIC related entries in MADT 1145 * returns 0 on success, < 0 on error 1146 */ 1147 static int __init acpi_parse_madt_ioapic_entries(void) 1148 { 1149 int count; 1150 1151 /* 1152 * ACPI interpreter is required to complete interrupt setup, 1153 * so if it is off, don't enumerate the io-apics with ACPI. 1154 * If MPS is present, it will handle them, 1155 * otherwise the system will stay in PIC mode 1156 */ 1157 if (acpi_disabled || acpi_noirq) 1158 return -ENODEV; 1159 1160 if (!boot_cpu_has(X86_FEATURE_APIC)) 1161 return -ENODEV; 1162 1163 /* 1164 * if "noapic" boot option, don't look for IO-APICs 1165 */ 1166 if (skip_ioapic_setup) { 1167 printk(KERN_INFO PREFIX "Skipping IOAPIC probe " 1168 "due to 'noapic' option.\n"); 1169 return -ENODEV; 1170 } 1171 1172 count = acpi_table_parse_madt(ACPI_MADT_TYPE_IO_APIC, acpi_parse_ioapic, 1173 MAX_IO_APICS); 1174 if (!count) { 1175 printk(KERN_ERR PREFIX "No IOAPIC entries present\n"); 1176 return -ENODEV; 1177 } else if (count < 0) { 1178 printk(KERN_ERR PREFIX "Error parsing IOAPIC entry\n"); 1179 return count; 1180 } 1181 1182 count = acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE, 1183 acpi_parse_int_src_ovr, nr_irqs); 1184 if (count < 0) { 1185 printk(KERN_ERR PREFIX 1186 "Error parsing interrupt source overrides entry\n"); 1187 /* TBD: Cleanup to allow fallback to MPS */ 1188 return count; 1189 } 1190 1191 /* 1192 * If BIOS did not supply an INT_SRC_OVR for the SCI 1193 * pretend we got one so we can set the SCI flags. 1194 */ 1195 if (!acpi_sci_override_gsi) 1196 acpi_sci_ioapic_setup(acpi_gbl_FADT.sci_interrupt, 0, 0, 1197 acpi_gbl_FADT.sci_interrupt); 1198 1199 /* Fill in identity legacy mappings where no override */ 1200 mp_config_acpi_legacy_irqs(); 1201 1202 count = acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE, 1203 acpi_parse_nmi_src, nr_irqs); 1204 if (count < 0) { 1205 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n"); 1206 /* TBD: Cleanup to allow fallback to MPS */ 1207 return count; 1208 } 1209 1210 return 0; 1211 } 1212 #else 1213 static inline int acpi_parse_madt_ioapic_entries(void) 1214 { 1215 return -1; 1216 } 1217 #endif /* !CONFIG_X86_IO_APIC */ 1218 1219 static void __init early_acpi_process_madt(void) 1220 { 1221 #ifdef CONFIG_X86_LOCAL_APIC 1222 int error; 1223 1224 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) { 1225 1226 /* 1227 * Parse MADT LAPIC entries 1228 */ 1229 error = early_acpi_parse_madt_lapic_addr_ovr(); 1230 if (!error) { 1231 acpi_lapic = 1; 1232 smp_found_config = 1; 1233 } 1234 if (error == -EINVAL) { 1235 /* 1236 * Dell Precision Workstation 410, 610 come here. 1237 */ 1238 printk(KERN_ERR PREFIX 1239 "Invalid BIOS MADT, disabling ACPI\n"); 1240 disable_acpi(); 1241 } 1242 } 1243 #endif 1244 } 1245 1246 static void __init acpi_process_madt(void) 1247 { 1248 #ifdef CONFIG_X86_LOCAL_APIC 1249 int error; 1250 1251 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) { 1252 1253 /* 1254 * Parse MADT LAPIC entries 1255 */ 1256 error = acpi_parse_madt_lapic_entries(); 1257 if (!error) { 1258 acpi_lapic = 1; 1259 1260 /* 1261 * Parse MADT IO-APIC entries 1262 */ 1263 mutex_lock(&acpi_ioapic_lock); 1264 error = acpi_parse_madt_ioapic_entries(); 1265 mutex_unlock(&acpi_ioapic_lock); 1266 if (!error) { 1267 acpi_set_irq_model_ioapic(); 1268 1269 smp_found_config = 1; 1270 } 1271 } 1272 if (error == -EINVAL) { 1273 /* 1274 * Dell Precision Workstation 410, 610 come here. 1275 */ 1276 printk(KERN_ERR PREFIX 1277 "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 printk(KERN_WARNING PREFIX 1288 "No APIC-table, disabling MPS\n"); 1289 smp_found_config = 0; 1290 } 1291 } 1292 1293 /* 1294 * ACPI supports both logical (e.g. Hyper-Threading) and physical 1295 * processors, where MPS only supports physical. 1296 */ 1297 if (acpi_lapic && acpi_ioapic) 1298 printk(KERN_INFO "Using ACPI (MADT) for SMP configuration " 1299 "information\n"); 1300 else if (acpi_lapic) 1301 printk(KERN_INFO "Using ACPI for processor (LAPIC) " 1302 "configuration information\n"); 1303 #endif 1304 return; 1305 } 1306 1307 static int __init disable_acpi_irq(const struct dmi_system_id *d) 1308 { 1309 if (!acpi_force) { 1310 printk(KERN_NOTICE "%s detected: force use of acpi=noirq\n", 1311 d->ident); 1312 acpi_noirq_set(); 1313 } 1314 return 0; 1315 } 1316 1317 static int __init disable_acpi_pci(const struct dmi_system_id *d) 1318 { 1319 if (!acpi_force) { 1320 printk(KERN_NOTICE "%s detected: force use of pci=noacpi\n", 1321 d->ident); 1322 acpi_disable_pci(); 1323 } 1324 return 0; 1325 } 1326 1327 static int __init dmi_disable_acpi(const struct dmi_system_id *d) 1328 { 1329 if (!acpi_force) { 1330 printk(KERN_NOTICE "%s detected: acpi off\n", d->ident); 1331 disable_acpi(); 1332 } else { 1333 printk(KERN_NOTICE 1334 "Warning: DMI blacklist says broken, but acpi forced\n"); 1335 } 1336 return 0; 1337 } 1338 1339 /* 1340 * Force ignoring BIOS IRQ0 override 1341 */ 1342 static int __init dmi_ignore_irq0_timer_override(const struct dmi_system_id *d) 1343 { 1344 if (!acpi_skip_timer_override) { 1345 pr_notice("%s detected: Ignoring BIOS IRQ0 override\n", 1346 d->ident); 1347 acpi_skip_timer_override = 1; 1348 } 1349 return 0; 1350 } 1351 1352 /* 1353 * ACPI offers an alternative platform interface model that removes 1354 * ACPI hardware requirements for platforms that do not implement 1355 * the PC Architecture. 1356 * 1357 * We initialize the Hardware-reduced ACPI model here: 1358 */ 1359 static void __init acpi_reduced_hw_init(void) 1360 { 1361 if (acpi_gbl_reduced_hardware) { 1362 /* 1363 * Override x86_init functions and bypass legacy pic 1364 * in Hardware-reduced ACPI mode 1365 */ 1366 x86_init.timers.timer_init = x86_init_noop; 1367 x86_init.irqs.pre_vector_init = x86_init_noop; 1368 legacy_pic = &null_legacy_pic; 1369 } 1370 } 1371 1372 /* 1373 * If your system is blacklisted here, but you find that acpi=force 1374 * works for you, please contact linux-acpi@vger.kernel.org 1375 */ 1376 static const struct dmi_system_id acpi_dmi_table[] __initconst = { 1377 /* 1378 * Boxes that need ACPI disabled 1379 */ 1380 { 1381 .callback = dmi_disable_acpi, 1382 .ident = "IBM Thinkpad", 1383 .matches = { 1384 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), 1385 DMI_MATCH(DMI_BOARD_NAME, "2629H1G"), 1386 }, 1387 }, 1388 1389 /* 1390 * Boxes that need ACPI PCI IRQ routing disabled 1391 */ 1392 { 1393 .callback = disable_acpi_irq, 1394 .ident = "ASUS A7V", 1395 .matches = { 1396 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC"), 1397 DMI_MATCH(DMI_BOARD_NAME, "<A7V>"), 1398 /* newer BIOS, Revision 1011, does work */ 1399 DMI_MATCH(DMI_BIOS_VERSION, 1400 "ASUS A7V ACPI BIOS Revision 1007"), 1401 }, 1402 }, 1403 { 1404 /* 1405 * Latest BIOS for IBM 600E (1.16) has bad pcinum 1406 * for LPC bridge, which is needed for the PCI 1407 * interrupt links to work. DSDT fix is in bug 5966. 1408 * 2645, 2646 model numbers are shared with 600/600E/600X 1409 */ 1410 .callback = disable_acpi_irq, 1411 .ident = "IBM Thinkpad 600 Series 2645", 1412 .matches = { 1413 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), 1414 DMI_MATCH(DMI_BOARD_NAME, "2645"), 1415 }, 1416 }, 1417 { 1418 .callback = disable_acpi_irq, 1419 .ident = "IBM Thinkpad 600 Series 2646", 1420 .matches = { 1421 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), 1422 DMI_MATCH(DMI_BOARD_NAME, "2646"), 1423 }, 1424 }, 1425 /* 1426 * Boxes that need ACPI PCI IRQ routing and PCI scan disabled 1427 */ 1428 { /* _BBN 0 bug */ 1429 .callback = disable_acpi_pci, 1430 .ident = "ASUS PR-DLS", 1431 .matches = { 1432 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."), 1433 DMI_MATCH(DMI_BOARD_NAME, "PR-DLS"), 1434 DMI_MATCH(DMI_BIOS_VERSION, 1435 "ASUS PR-DLS ACPI BIOS Revision 1010"), 1436 DMI_MATCH(DMI_BIOS_DATE, "03/21/2003") 1437 }, 1438 }, 1439 { 1440 .callback = disable_acpi_pci, 1441 .ident = "Acer TravelMate 36x Laptop", 1442 .matches = { 1443 DMI_MATCH(DMI_SYS_VENDOR, "Acer"), 1444 DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"), 1445 }, 1446 }, 1447 {} 1448 }; 1449 1450 /* second table for DMI checks that should run after early-quirks */ 1451 static const struct dmi_system_id acpi_dmi_table_late[] __initconst = { 1452 /* 1453 * HP laptops which use a DSDT reporting as HP/SB400/10000, 1454 * which includes some code which overrides all temperature 1455 * trip points to 16C if the INTIN2 input of the I/O APIC 1456 * is enabled. This input is incorrectly designated the 1457 * ISA IRQ 0 via an interrupt source override even though 1458 * it is wired to the output of the master 8259A and INTIN0 1459 * is not connected at all. Force ignoring BIOS IRQ0 1460 * override in that cases. 1461 */ 1462 { 1463 .callback = dmi_ignore_irq0_timer_override, 1464 .ident = "HP nx6115 laptop", 1465 .matches = { 1466 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 1467 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6115"), 1468 }, 1469 }, 1470 { 1471 .callback = dmi_ignore_irq0_timer_override, 1472 .ident = "HP NX6125 laptop", 1473 .matches = { 1474 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 1475 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6125"), 1476 }, 1477 }, 1478 { 1479 .callback = dmi_ignore_irq0_timer_override, 1480 .ident = "HP NX6325 laptop", 1481 .matches = { 1482 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 1483 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6325"), 1484 }, 1485 }, 1486 { 1487 .callback = dmi_ignore_irq0_timer_override, 1488 .ident = "HP 6715b laptop", 1489 .matches = { 1490 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 1491 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq 6715b"), 1492 }, 1493 }, 1494 { 1495 .callback = dmi_ignore_irq0_timer_override, 1496 .ident = "FUJITSU SIEMENS", 1497 .matches = { 1498 DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"), 1499 DMI_MATCH(DMI_PRODUCT_NAME, "AMILO PRO V2030"), 1500 }, 1501 }, 1502 {} 1503 }; 1504 1505 /* 1506 * acpi_boot_table_init() and acpi_boot_init() 1507 * called from setup_arch(), always. 1508 * 1. checksums all tables 1509 * 2. enumerates lapics 1510 * 3. enumerates io-apics 1511 * 1512 * acpi_table_init() is separate to allow reading SRAT without 1513 * other side effects. 1514 * 1515 * side effects of acpi_boot_init: 1516 * acpi_lapic = 1 if LAPIC found 1517 * acpi_ioapic = 1 if IOAPIC found 1518 * if (acpi_lapic && acpi_ioapic) smp_found_config = 1; 1519 * if acpi_blacklisted() acpi_disabled = 1; 1520 * acpi_irq_model=... 1521 * ... 1522 */ 1523 1524 void __init acpi_boot_table_init(void) 1525 { 1526 dmi_check_system(acpi_dmi_table); 1527 1528 /* 1529 * If acpi_disabled, bail out 1530 */ 1531 if (acpi_disabled) 1532 return; 1533 1534 /* 1535 * Initialize the ACPI boot-time table parser. 1536 */ 1537 if (acpi_table_init()) { 1538 disable_acpi(); 1539 return; 1540 } 1541 1542 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf); 1543 1544 /* 1545 * blacklist may disable ACPI entirely 1546 */ 1547 if (acpi_blacklisted()) { 1548 if (acpi_force) { 1549 printk(KERN_WARNING PREFIX "acpi=force override\n"); 1550 } else { 1551 printk(KERN_WARNING PREFIX "Disabling ACPI support\n"); 1552 disable_acpi(); 1553 return; 1554 } 1555 } 1556 } 1557 1558 int __init early_acpi_boot_init(void) 1559 { 1560 /* 1561 * If acpi_disabled, bail out 1562 */ 1563 if (acpi_disabled) 1564 return 1; 1565 1566 /* 1567 * Process the Multiple APIC Description Table (MADT), if present 1568 */ 1569 early_acpi_process_madt(); 1570 1571 /* 1572 * Hardware-reduced ACPI mode initialization: 1573 */ 1574 acpi_reduced_hw_init(); 1575 1576 return 0; 1577 } 1578 1579 int __init acpi_boot_init(void) 1580 { 1581 /* those are executed after early-quirks are executed */ 1582 dmi_check_system(acpi_dmi_table_late); 1583 1584 /* 1585 * If acpi_disabled, bail out 1586 */ 1587 if (acpi_disabled) 1588 return 1; 1589 1590 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf); 1591 1592 /* 1593 * set sci_int and PM timer address 1594 */ 1595 acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt); 1596 1597 /* 1598 * Process the Multiple APIC Description Table (MADT), if present 1599 */ 1600 acpi_process_madt(); 1601 1602 acpi_table_parse(ACPI_SIG_HPET, acpi_parse_hpet); 1603 if (IS_ENABLED(CONFIG_ACPI_BGRT)) 1604 acpi_table_parse(ACPI_SIG_BGRT, acpi_parse_bgrt); 1605 1606 if (!acpi_noirq) 1607 x86_init.pci.init = pci_acpi_init; 1608 1609 return 0; 1610 } 1611 1612 static int __init parse_acpi(char *arg) 1613 { 1614 if (!arg) 1615 return -EINVAL; 1616 1617 /* "acpi=off" disables both ACPI table parsing and interpreter */ 1618 if (strcmp(arg, "off") == 0) { 1619 disable_acpi(); 1620 } 1621 /* acpi=force to over-ride black-list */ 1622 else if (strcmp(arg, "force") == 0) { 1623 acpi_force = 1; 1624 acpi_disabled = 0; 1625 } 1626 /* acpi=strict disables out-of-spec workarounds */ 1627 else if (strcmp(arg, "strict") == 0) { 1628 acpi_strict = 1; 1629 } 1630 /* acpi=rsdt use RSDT instead of XSDT */ 1631 else if (strcmp(arg, "rsdt") == 0) { 1632 acpi_gbl_do_not_use_xsdt = TRUE; 1633 } 1634 /* "acpi=noirq" disables ACPI interrupt routing */ 1635 else if (strcmp(arg, "noirq") == 0) { 1636 acpi_noirq_set(); 1637 } 1638 /* "acpi=copy_dsdt" copys DSDT */ 1639 else if (strcmp(arg, "copy_dsdt") == 0) { 1640 acpi_gbl_copy_dsdt_locally = 1; 1641 } 1642 /* "acpi=nocmcff" disables FF mode for corrected errors */ 1643 else if (strcmp(arg, "nocmcff") == 0) { 1644 acpi_disable_cmcff = 1; 1645 } else { 1646 /* Core will printk when we return error. */ 1647 return -EINVAL; 1648 } 1649 return 0; 1650 } 1651 early_param("acpi", parse_acpi); 1652 1653 /* FIXME: Using pci= for an ACPI parameter is a travesty. */ 1654 static int __init parse_pci(char *arg) 1655 { 1656 if (arg && strcmp(arg, "noacpi") == 0) 1657 acpi_disable_pci(); 1658 return 0; 1659 } 1660 early_param("pci", parse_pci); 1661 1662 int __init acpi_mps_check(void) 1663 { 1664 #if defined(CONFIG_X86_LOCAL_APIC) && !defined(CONFIG_X86_MPPARSE) 1665 /* mptable code is not built-in*/ 1666 if (acpi_disabled || acpi_noirq) { 1667 printk(KERN_WARNING "MPS support code is not built-in.\n" 1668 "Using acpi=off or acpi=noirq or pci=noacpi " 1669 "may have problem\n"); 1670 return 1; 1671 } 1672 #endif 1673 return 0; 1674 } 1675 1676 #ifdef CONFIG_X86_IO_APIC 1677 static int __init parse_acpi_skip_timer_override(char *arg) 1678 { 1679 acpi_skip_timer_override = 1; 1680 return 0; 1681 } 1682 early_param("acpi_skip_timer_override", parse_acpi_skip_timer_override); 1683 1684 static int __init parse_acpi_use_timer_override(char *arg) 1685 { 1686 acpi_use_timer_override = 1; 1687 return 0; 1688 } 1689 early_param("acpi_use_timer_override", parse_acpi_use_timer_override); 1690 #endif /* CONFIG_X86_IO_APIC */ 1691 1692 static int __init setup_acpi_sci(char *s) 1693 { 1694 if (!s) 1695 return -EINVAL; 1696 if (!strcmp(s, "edge")) 1697 acpi_sci_flags = ACPI_MADT_TRIGGER_EDGE | 1698 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK); 1699 else if (!strcmp(s, "level")) 1700 acpi_sci_flags = ACPI_MADT_TRIGGER_LEVEL | 1701 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK); 1702 else if (!strcmp(s, "high")) 1703 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_HIGH | 1704 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK); 1705 else if (!strcmp(s, "low")) 1706 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_LOW | 1707 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK); 1708 else 1709 return -EINVAL; 1710 return 0; 1711 } 1712 early_param("acpi_sci", setup_acpi_sci); 1713 1714 int __acpi_acquire_global_lock(unsigned int *lock) 1715 { 1716 unsigned int old, new, val; 1717 do { 1718 old = *lock; 1719 new = (((old & ~0x3) + 2) + ((old >> 1) & 0x1)); 1720 val = cmpxchg(lock, old, new); 1721 } while (unlikely (val != old)); 1722 return (new < 3) ? -1 : 0; 1723 } 1724 1725 int __acpi_release_global_lock(unsigned int *lock) 1726 { 1727 unsigned int old, new, val; 1728 do { 1729 old = *lock; 1730 new = old & ~0x3; 1731 val = cmpxchg(lock, old, new); 1732 } while (unlikely (val != old)); 1733 return old & 0x1; 1734 } 1735 1736 void __init arch_reserve_mem_area(acpi_physical_address addr, size_t size) 1737 { 1738 e820__range_add(addr, size, E820_TYPE_ACPI); 1739 e820__update_table_print(); 1740 } 1741