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_ioremap(), 119 * with sanity checks for phys == 0 and size == 0. 120 */ 121 char *__init __acpi_map_table(unsigned long phys, unsigned long size) 122 { 123 124 if (!phys || !size) 125 return NULL; 126 127 return early_ioremap(phys, size); 128 } 129 130 void __init __acpi_unmap_table(char *map, unsigned long size) 131 { 132 if (!map || !size) 133 return; 134 135 early_iounmap(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 int apic_id; 203 u8 enabled; 204 205 processor = (struct acpi_madt_local_x2apic *)header; 206 207 if (BAD_MADT_ENTRY(processor, end)) 208 return -EINVAL; 209 210 acpi_table_print_madt_entry(header); 211 212 apic_id = processor->local_apic_id; 213 enabled = processor->lapic_flags & ACPI_MADT_ENABLED; 214 #ifdef CONFIG_X86_X2APIC 215 /* 216 * We need to register disabled CPU as well to permit 217 * counting disabled CPUs. This allows us to size 218 * cpus_possible_map more accurately, to permit 219 * to not preallocating memory for all NR_CPUS 220 * when we use CPU hotplug. 221 */ 222 if (!apic->apic_id_valid(apic_id) && enabled) 223 printk(KERN_WARNING PREFIX "x2apic entry ignored\n"); 224 else 225 acpi_register_lapic(apic_id, processor->uid, enabled); 226 #else 227 printk(KERN_WARNING PREFIX "x2apic entry ignored\n"); 228 #endif 229 230 return 0; 231 } 232 233 static int __init 234 acpi_parse_lapic(struct acpi_subtable_header * header, const unsigned long end) 235 { 236 struct acpi_madt_local_apic *processor = NULL; 237 238 processor = (struct acpi_madt_local_apic *)header; 239 240 if (BAD_MADT_ENTRY(processor, end)) 241 return -EINVAL; 242 243 acpi_table_print_madt_entry(header); 244 245 /* Ignore invalid ID */ 246 if (processor->id == 0xff) 247 return 0; 248 249 /* 250 * We need to register disabled CPU as well to permit 251 * counting disabled CPUs. This allows us to size 252 * cpus_possible_map more accurately, to permit 253 * to not preallocating memory for all NR_CPUS 254 * when we use CPU hotplug. 255 */ 256 acpi_register_lapic(processor->id, /* APIC ID */ 257 processor->processor_id, /* ACPI ID */ 258 processor->lapic_flags & ACPI_MADT_ENABLED); 259 260 return 0; 261 } 262 263 static int __init 264 acpi_parse_sapic(struct acpi_subtable_header *header, const unsigned long end) 265 { 266 struct acpi_madt_local_sapic *processor = NULL; 267 268 processor = (struct acpi_madt_local_sapic *)header; 269 270 if (BAD_MADT_ENTRY(processor, end)) 271 return -EINVAL; 272 273 acpi_table_print_madt_entry(header); 274 275 acpi_register_lapic((processor->id << 8) | processor->eid,/* APIC ID */ 276 processor->processor_id, /* ACPI ID */ 277 processor->lapic_flags & ACPI_MADT_ENABLED); 278 279 return 0; 280 } 281 282 static int __init 283 acpi_parse_lapic_addr_ovr(struct acpi_subtable_header * header, 284 const unsigned long end) 285 { 286 struct acpi_madt_local_apic_override *lapic_addr_ovr = NULL; 287 288 lapic_addr_ovr = (struct acpi_madt_local_apic_override *)header; 289 290 if (BAD_MADT_ENTRY(lapic_addr_ovr, end)) 291 return -EINVAL; 292 293 acpi_table_print_madt_entry(header); 294 295 acpi_lapic_addr = lapic_addr_ovr->address; 296 297 return 0; 298 } 299 300 static int __init 301 acpi_parse_x2apic_nmi(struct acpi_subtable_header *header, 302 const unsigned long end) 303 { 304 struct acpi_madt_local_x2apic_nmi *x2apic_nmi = NULL; 305 306 x2apic_nmi = (struct acpi_madt_local_x2apic_nmi *)header; 307 308 if (BAD_MADT_ENTRY(x2apic_nmi, end)) 309 return -EINVAL; 310 311 acpi_table_print_madt_entry(header); 312 313 if (x2apic_nmi->lint != 1) 314 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n"); 315 316 return 0; 317 } 318 319 static int __init 320 acpi_parse_lapic_nmi(struct acpi_subtable_header * header, const unsigned long end) 321 { 322 struct acpi_madt_local_apic_nmi *lapic_nmi = NULL; 323 324 lapic_nmi = (struct acpi_madt_local_apic_nmi *)header; 325 326 if (BAD_MADT_ENTRY(lapic_nmi, end)) 327 return -EINVAL; 328 329 acpi_table_print_madt_entry(header); 330 331 if (lapic_nmi->lint != 1) 332 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n"); 333 334 return 0; 335 } 336 337 #endif /*CONFIG_X86_LOCAL_APIC */ 338 339 #ifdef CONFIG_X86_IO_APIC 340 #define MP_ISA_BUS 0 341 342 static void __init mp_override_legacy_irq(u8 bus_irq, u8 polarity, u8 trigger, 343 u32 gsi) 344 { 345 int ioapic; 346 int pin; 347 struct mpc_intsrc mp_irq; 348 349 /* 350 * Check bus_irq boundary. 351 */ 352 if (bus_irq >= NR_IRQS_LEGACY) { 353 pr_warn("Invalid bus_irq %u for legacy override\n", bus_irq); 354 return; 355 } 356 357 /* 358 * Convert 'gsi' to 'ioapic.pin'. 359 */ 360 ioapic = mp_find_ioapic(gsi); 361 if (ioapic < 0) 362 return; 363 pin = mp_find_ioapic_pin(ioapic, gsi); 364 365 /* 366 * TBD: This check is for faulty timer entries, where the override 367 * erroneously sets the trigger to level, resulting in a HUGE 368 * increase of timer interrupts! 369 */ 370 if ((bus_irq == 0) && (trigger == 3)) 371 trigger = 1; 372 373 mp_irq.type = MP_INTSRC; 374 mp_irq.irqtype = mp_INT; 375 mp_irq.irqflag = (trigger << 2) | polarity; 376 mp_irq.srcbus = MP_ISA_BUS; 377 mp_irq.srcbusirq = bus_irq; /* IRQ */ 378 mp_irq.dstapic = mpc_ioapic_id(ioapic); /* APIC ID */ 379 mp_irq.dstirq = pin; /* INTIN# */ 380 381 mp_save_irq(&mp_irq); 382 383 /* 384 * Reset default identity mapping if gsi is also an legacy IRQ, 385 * otherwise there will be more than one entry with the same GSI 386 * and acpi_isa_irq_to_gsi() may give wrong result. 387 */ 388 if (gsi < nr_legacy_irqs() && isa_irq_to_gsi[gsi] == gsi) 389 isa_irq_to_gsi[gsi] = ACPI_INVALID_GSI; 390 isa_irq_to_gsi[bus_irq] = gsi; 391 } 392 393 static int mp_config_acpi_gsi(struct device *dev, u32 gsi, int trigger, 394 int polarity) 395 { 396 #ifdef CONFIG_X86_MPPARSE 397 struct mpc_intsrc mp_irq; 398 struct pci_dev *pdev; 399 unsigned char number; 400 unsigned int devfn; 401 int ioapic; 402 u8 pin; 403 404 if (!acpi_ioapic) 405 return 0; 406 if (!dev || !dev_is_pci(dev)) 407 return 0; 408 409 pdev = to_pci_dev(dev); 410 number = pdev->bus->number; 411 devfn = pdev->devfn; 412 pin = pdev->pin; 413 /* print the entry should happen on mptable identically */ 414 mp_irq.type = MP_INTSRC; 415 mp_irq.irqtype = mp_INT; 416 mp_irq.irqflag = (trigger == ACPI_EDGE_SENSITIVE ? 4 : 0x0c) | 417 (polarity == ACPI_ACTIVE_HIGH ? 1 : 3); 418 mp_irq.srcbus = number; 419 mp_irq.srcbusirq = (((devfn >> 3) & 0x1f) << 2) | ((pin - 1) & 3); 420 ioapic = mp_find_ioapic(gsi); 421 mp_irq.dstapic = mpc_ioapic_id(ioapic); 422 mp_irq.dstirq = mp_find_ioapic_pin(ioapic, gsi); 423 424 mp_save_irq(&mp_irq); 425 #endif 426 return 0; 427 } 428 429 static int __init 430 acpi_parse_ioapic(struct acpi_subtable_header * header, const unsigned long end) 431 { 432 struct acpi_madt_io_apic *ioapic = NULL; 433 struct ioapic_domain_cfg cfg = { 434 .type = IOAPIC_DOMAIN_DYNAMIC, 435 .ops = &mp_ioapic_irqdomain_ops, 436 }; 437 438 ioapic = (struct acpi_madt_io_apic *)header; 439 440 if (BAD_MADT_ENTRY(ioapic, end)) 441 return -EINVAL; 442 443 acpi_table_print_madt_entry(header); 444 445 /* Statically assign IRQ numbers for IOAPICs hosting legacy IRQs */ 446 if (ioapic->global_irq_base < nr_legacy_irqs()) 447 cfg.type = IOAPIC_DOMAIN_LEGACY; 448 449 mp_register_ioapic(ioapic->id, ioapic->address, ioapic->global_irq_base, 450 &cfg); 451 452 return 0; 453 } 454 455 /* 456 * Parse Interrupt Source Override for the ACPI SCI 457 */ 458 static void __init acpi_sci_ioapic_setup(u8 bus_irq, u16 polarity, u16 trigger, u32 gsi) 459 { 460 if (trigger == 0) /* compatible SCI trigger is level */ 461 trigger = 3; 462 463 if (polarity == 0) /* compatible SCI polarity is low */ 464 polarity = 3; 465 466 /* Command-line over-ride via acpi_sci= */ 467 if (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) 468 trigger = (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2; 469 470 if (acpi_sci_flags & ACPI_MADT_POLARITY_MASK) 471 polarity = acpi_sci_flags & ACPI_MADT_POLARITY_MASK; 472 473 mp_override_legacy_irq(bus_irq, polarity, trigger, gsi); 474 acpi_penalize_sci_irq(bus_irq, trigger, polarity); 475 476 /* 477 * stash over-ride to indicate we've been here 478 * and for later update of acpi_gbl_FADT 479 */ 480 acpi_sci_override_gsi = gsi; 481 return; 482 } 483 484 static int __init 485 acpi_parse_int_src_ovr(struct acpi_subtable_header * header, 486 const unsigned long end) 487 { 488 struct acpi_madt_interrupt_override *intsrc = NULL; 489 490 intsrc = (struct acpi_madt_interrupt_override *)header; 491 492 if (BAD_MADT_ENTRY(intsrc, end)) 493 return -EINVAL; 494 495 acpi_table_print_madt_entry(header); 496 497 if (intsrc->source_irq == acpi_gbl_FADT.sci_interrupt) { 498 acpi_sci_ioapic_setup(intsrc->source_irq, 499 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK, 500 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2, 501 intsrc->global_irq); 502 return 0; 503 } 504 505 if (intsrc->source_irq == 0) { 506 if (acpi_skip_timer_override) { 507 printk(PREFIX "BIOS IRQ0 override ignored.\n"); 508 return 0; 509 } 510 511 if ((intsrc->global_irq == 2) && acpi_fix_pin2_polarity 512 && (intsrc->inti_flags & ACPI_MADT_POLARITY_MASK)) { 513 intsrc->inti_flags &= ~ACPI_MADT_POLARITY_MASK; 514 printk(PREFIX "BIOS IRQ0 pin2 override: forcing polarity to high active.\n"); 515 } 516 } 517 518 mp_override_legacy_irq(intsrc->source_irq, 519 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK, 520 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2, 521 intsrc->global_irq); 522 523 return 0; 524 } 525 526 static int __init 527 acpi_parse_nmi_src(struct acpi_subtable_header * header, const unsigned long end) 528 { 529 struct acpi_madt_nmi_source *nmi_src = NULL; 530 531 nmi_src = (struct acpi_madt_nmi_source *)header; 532 533 if (BAD_MADT_ENTRY(nmi_src, end)) 534 return -EINVAL; 535 536 acpi_table_print_madt_entry(header); 537 538 /* TBD: Support nimsrc entries? */ 539 540 return 0; 541 } 542 543 #endif /* CONFIG_X86_IO_APIC */ 544 545 /* 546 * acpi_pic_sci_set_trigger() 547 * 548 * use ELCR to set PIC-mode trigger type for SCI 549 * 550 * If a PIC-mode SCI is not recognized or gives spurious IRQ7's 551 * it may require Edge Trigger -- use "acpi_sci=edge" 552 * 553 * Port 0x4d0-4d1 are ECLR1 and ECLR2, the Edge/Level Control Registers 554 * for the 8259 PIC. bit[n] = 1 means irq[n] is Level, otherwise Edge. 555 * ECLR1 is IRQs 0-7 (IRQ 0, 1, 2 must be 0) 556 * ECLR2 is IRQs 8-15 (IRQ 8, 13 must be 0) 557 */ 558 559 void __init acpi_pic_sci_set_trigger(unsigned int irq, u16 trigger) 560 { 561 unsigned int mask = 1 << irq; 562 unsigned int old, new; 563 564 /* Real old ELCR mask */ 565 old = inb(0x4d0) | (inb(0x4d1) << 8); 566 567 /* 568 * If we use ACPI to set PCI IRQs, then we should clear ELCR 569 * since we will set it correctly as we enable the PCI irq 570 * routing. 571 */ 572 new = acpi_noirq ? old : 0; 573 574 /* 575 * Update SCI information in the ELCR, it isn't in the PCI 576 * routing tables.. 577 */ 578 switch (trigger) { 579 case 1: /* Edge - clear */ 580 new &= ~mask; 581 break; 582 case 3: /* Level - set */ 583 new |= mask; 584 break; 585 } 586 587 if (old == new) 588 return; 589 590 printk(PREFIX "setting ELCR to %04x (from %04x)\n", new, old); 591 outb(new, 0x4d0); 592 outb(new >> 8, 0x4d1); 593 } 594 595 int acpi_gsi_to_irq(u32 gsi, unsigned int *irqp) 596 { 597 int rc, irq, trigger, polarity; 598 599 if (acpi_irq_model == ACPI_IRQ_MODEL_PIC) { 600 *irqp = gsi; 601 return 0; 602 } 603 604 rc = acpi_get_override_irq(gsi, &trigger, &polarity); 605 if (rc == 0) { 606 trigger = trigger ? ACPI_LEVEL_SENSITIVE : ACPI_EDGE_SENSITIVE; 607 polarity = polarity ? ACPI_ACTIVE_LOW : ACPI_ACTIVE_HIGH; 608 irq = acpi_register_gsi(NULL, gsi, trigger, polarity); 609 if (irq >= 0) { 610 *irqp = irq; 611 return 0; 612 } 613 } 614 615 return -1; 616 } 617 EXPORT_SYMBOL_GPL(acpi_gsi_to_irq); 618 619 int acpi_isa_irq_to_gsi(unsigned isa_irq, u32 *gsi) 620 { 621 if (isa_irq < nr_legacy_irqs() && 622 isa_irq_to_gsi[isa_irq] != ACPI_INVALID_GSI) { 623 *gsi = isa_irq_to_gsi[isa_irq]; 624 return 0; 625 } 626 627 return -1; 628 } 629 630 static int acpi_register_gsi_pic(struct device *dev, u32 gsi, 631 int trigger, int polarity) 632 { 633 #ifdef CONFIG_PCI 634 /* 635 * Make sure all (legacy) PCI IRQs are set as level-triggered. 636 */ 637 if (trigger == ACPI_LEVEL_SENSITIVE) 638 elcr_set_level_irq(gsi); 639 #endif 640 641 return gsi; 642 } 643 644 #ifdef CONFIG_X86_LOCAL_APIC 645 static int acpi_register_gsi_ioapic(struct device *dev, u32 gsi, 646 int trigger, int polarity) 647 { 648 int irq = gsi; 649 #ifdef CONFIG_X86_IO_APIC 650 int node; 651 struct irq_alloc_info info; 652 653 node = dev ? dev_to_node(dev) : NUMA_NO_NODE; 654 trigger = trigger == ACPI_EDGE_SENSITIVE ? 0 : 1; 655 polarity = polarity == ACPI_ACTIVE_HIGH ? 0 : 1; 656 ioapic_set_alloc_attr(&info, node, trigger, polarity); 657 658 mutex_lock(&acpi_ioapic_lock); 659 irq = mp_map_gsi_to_irq(gsi, IOAPIC_MAP_ALLOC, &info); 660 /* Don't set up the ACPI SCI because it's already set up */ 661 if (irq >= 0 && enable_update_mptable && 662 acpi_gbl_FADT.sci_interrupt != gsi) 663 mp_config_acpi_gsi(dev, gsi, trigger, polarity); 664 mutex_unlock(&acpi_ioapic_lock); 665 #endif 666 667 return irq; 668 } 669 670 static void acpi_unregister_gsi_ioapic(u32 gsi) 671 { 672 #ifdef CONFIG_X86_IO_APIC 673 int irq; 674 675 mutex_lock(&acpi_ioapic_lock); 676 irq = mp_map_gsi_to_irq(gsi, 0, NULL); 677 if (irq > 0) 678 mp_unmap_irq(irq); 679 mutex_unlock(&acpi_ioapic_lock); 680 #endif 681 } 682 #endif 683 684 int (*__acpi_register_gsi)(struct device *dev, u32 gsi, 685 int trigger, int polarity) = acpi_register_gsi_pic; 686 void (*__acpi_unregister_gsi)(u32 gsi) = NULL; 687 688 #ifdef CONFIG_ACPI_SLEEP 689 int (*acpi_suspend_lowlevel)(void) = x86_acpi_suspend_lowlevel; 690 #else 691 int (*acpi_suspend_lowlevel)(void); 692 #endif 693 694 /* 695 * success: return IRQ number (>=0) 696 * failure: return < 0 697 */ 698 int acpi_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity) 699 { 700 return __acpi_register_gsi(dev, gsi, trigger, polarity); 701 } 702 EXPORT_SYMBOL_GPL(acpi_register_gsi); 703 704 void acpi_unregister_gsi(u32 gsi) 705 { 706 if (__acpi_unregister_gsi) 707 __acpi_unregister_gsi(gsi); 708 } 709 EXPORT_SYMBOL_GPL(acpi_unregister_gsi); 710 711 #ifdef CONFIG_X86_LOCAL_APIC 712 static void __init acpi_set_irq_model_ioapic(void) 713 { 714 acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC; 715 __acpi_register_gsi = acpi_register_gsi_ioapic; 716 __acpi_unregister_gsi = acpi_unregister_gsi_ioapic; 717 acpi_ioapic = 1; 718 } 719 #endif 720 721 /* 722 * ACPI based hotplug support for CPU 723 */ 724 #ifdef CONFIG_ACPI_HOTPLUG_CPU 725 #include <acpi/processor.h> 726 727 static int acpi_map_cpu2node(acpi_handle handle, int cpu, int physid) 728 { 729 #ifdef CONFIG_ACPI_NUMA 730 int nid; 731 732 nid = acpi_get_node(handle); 733 if (nid != NUMA_NO_NODE) { 734 set_apicid_to_node(physid, nid); 735 numa_set_node(cpu, nid); 736 } 737 #endif 738 return 0; 739 } 740 741 int acpi_map_cpu(acpi_handle handle, phys_cpuid_t physid, u32 acpi_id, 742 int *pcpu) 743 { 744 int cpu; 745 746 cpu = acpi_register_lapic(physid, acpi_id, ACPI_MADT_ENABLED); 747 if (cpu < 0) { 748 pr_info(PREFIX "Unable to map lapic to logical cpu number\n"); 749 return cpu; 750 } 751 752 acpi_processor_set_pdc(handle); 753 acpi_map_cpu2node(handle, cpu, physid); 754 755 *pcpu = cpu; 756 return 0; 757 } 758 EXPORT_SYMBOL(acpi_map_cpu); 759 760 int acpi_unmap_cpu(int cpu) 761 { 762 #ifdef CONFIG_ACPI_NUMA 763 set_apicid_to_node(per_cpu(x86_cpu_to_apicid, cpu), NUMA_NO_NODE); 764 #endif 765 766 per_cpu(x86_cpu_to_apicid, cpu) = -1; 767 set_cpu_present(cpu, false); 768 num_processors--; 769 770 return (0); 771 } 772 EXPORT_SYMBOL(acpi_unmap_cpu); 773 #endif /* CONFIG_ACPI_HOTPLUG_CPU */ 774 775 int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base) 776 { 777 int ret = -ENOSYS; 778 #ifdef CONFIG_ACPI_HOTPLUG_IOAPIC 779 int ioapic_id; 780 u64 addr; 781 struct ioapic_domain_cfg cfg = { 782 .type = IOAPIC_DOMAIN_DYNAMIC, 783 .ops = &mp_ioapic_irqdomain_ops, 784 }; 785 786 ioapic_id = acpi_get_ioapic_id(handle, gsi_base, &addr); 787 if (ioapic_id < 0) { 788 unsigned long long uid; 789 acpi_status status; 790 791 status = acpi_evaluate_integer(handle, METHOD_NAME__UID, 792 NULL, &uid); 793 if (ACPI_FAILURE(status)) { 794 acpi_handle_warn(handle, "failed to get IOAPIC ID.\n"); 795 return -EINVAL; 796 } 797 ioapic_id = (int)uid; 798 } 799 800 mutex_lock(&acpi_ioapic_lock); 801 ret = mp_register_ioapic(ioapic_id, phys_addr, gsi_base, &cfg); 802 mutex_unlock(&acpi_ioapic_lock); 803 #endif 804 805 return ret; 806 } 807 EXPORT_SYMBOL(acpi_register_ioapic); 808 809 int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base) 810 { 811 int ret = -ENOSYS; 812 813 #ifdef CONFIG_ACPI_HOTPLUG_IOAPIC 814 mutex_lock(&acpi_ioapic_lock); 815 ret = mp_unregister_ioapic(gsi_base); 816 mutex_unlock(&acpi_ioapic_lock); 817 #endif 818 819 return ret; 820 } 821 EXPORT_SYMBOL(acpi_unregister_ioapic); 822 823 /** 824 * acpi_ioapic_registered - Check whether IOAPIC assoicatied with @gsi_base 825 * has been registered 826 * @handle: ACPI handle of the IOAPIC deivce 827 * @gsi_base: GSI base associated with the IOAPIC 828 * 829 * Assume caller holds some type of lock to serialize acpi_ioapic_registered() 830 * with acpi_register_ioapic()/acpi_unregister_ioapic(). 831 */ 832 int acpi_ioapic_registered(acpi_handle handle, u32 gsi_base) 833 { 834 int ret = 0; 835 836 #ifdef CONFIG_ACPI_HOTPLUG_IOAPIC 837 mutex_lock(&acpi_ioapic_lock); 838 ret = mp_ioapic_registered(gsi_base); 839 mutex_unlock(&acpi_ioapic_lock); 840 #endif 841 842 return ret; 843 } 844 845 static int __init acpi_parse_sbf(struct acpi_table_header *table) 846 { 847 struct acpi_table_boot *sb = (struct acpi_table_boot *)table; 848 849 sbf_port = sb->cmos_index; /* Save CMOS port */ 850 851 return 0; 852 } 853 854 #ifdef CONFIG_HPET_TIMER 855 #include <asm/hpet.h> 856 857 static struct resource *hpet_res __initdata; 858 859 static int __init acpi_parse_hpet(struct acpi_table_header *table) 860 { 861 struct acpi_table_hpet *hpet_tbl = (struct acpi_table_hpet *)table; 862 863 if (hpet_tbl->address.space_id != ACPI_SPACE_MEM) { 864 printk(KERN_WARNING PREFIX "HPET timers must be located in " 865 "memory.\n"); 866 return -1; 867 } 868 869 hpet_address = hpet_tbl->address.address; 870 hpet_blockid = hpet_tbl->sequence; 871 872 /* 873 * Some broken BIOSes advertise HPET at 0x0. We really do not 874 * want to allocate a resource there. 875 */ 876 if (!hpet_address) { 877 printk(KERN_WARNING PREFIX 878 "HPET id: %#x base: %#lx is invalid\n", 879 hpet_tbl->id, hpet_address); 880 return 0; 881 } 882 #ifdef CONFIG_X86_64 883 /* 884 * Some even more broken BIOSes advertise HPET at 885 * 0xfed0000000000000 instead of 0xfed00000. Fix it up and add 886 * some noise: 887 */ 888 if (hpet_address == 0xfed0000000000000UL) { 889 if (!hpet_force_user) { 890 printk(KERN_WARNING PREFIX "HPET id: %#x " 891 "base: 0xfed0000000000000 is bogus\n " 892 "try hpet=force on the kernel command line to " 893 "fix it up to 0xfed00000.\n", hpet_tbl->id); 894 hpet_address = 0; 895 return 0; 896 } 897 printk(KERN_WARNING PREFIX 898 "HPET id: %#x base: 0xfed0000000000000 fixed up " 899 "to 0xfed00000.\n", hpet_tbl->id); 900 hpet_address >>= 32; 901 } 902 #endif 903 printk(KERN_INFO PREFIX "HPET id: %#x base: %#lx\n", 904 hpet_tbl->id, hpet_address); 905 906 /* 907 * Allocate and initialize the HPET firmware resource for adding into 908 * the resource tree during the lateinit timeframe. 909 */ 910 #define HPET_RESOURCE_NAME_SIZE 9 911 hpet_res = alloc_bootmem(sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE); 912 913 hpet_res->name = (void *)&hpet_res[1]; 914 hpet_res->flags = IORESOURCE_MEM; 915 snprintf((char *)hpet_res->name, HPET_RESOURCE_NAME_SIZE, "HPET %u", 916 hpet_tbl->sequence); 917 918 hpet_res->start = hpet_address; 919 hpet_res->end = hpet_address + (1 * 1024) - 1; 920 921 return 0; 922 } 923 924 /* 925 * hpet_insert_resource inserts the HPET resources used into the resource 926 * tree. 927 */ 928 static __init int hpet_insert_resource(void) 929 { 930 if (!hpet_res) 931 return 1; 932 933 return insert_resource(&iomem_resource, hpet_res); 934 } 935 936 late_initcall(hpet_insert_resource); 937 938 #else 939 #define acpi_parse_hpet NULL 940 #endif 941 942 static int __init acpi_parse_fadt(struct acpi_table_header *table) 943 { 944 if (!(acpi_gbl_FADT.boot_flags & ACPI_FADT_LEGACY_DEVICES)) { 945 pr_debug("ACPI: no legacy devices present\n"); 946 x86_platform.legacy.devices.pnpbios = 0; 947 } 948 949 if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID && 950 !(acpi_gbl_FADT.boot_flags & ACPI_FADT_8042) && 951 x86_platform.legacy.i8042 != X86_LEGACY_I8042_PLATFORM_ABSENT) { 952 pr_debug("ACPI: i8042 controller is absent\n"); 953 x86_platform.legacy.i8042 = X86_LEGACY_I8042_FIRMWARE_ABSENT; 954 } 955 956 if (acpi_gbl_FADT.boot_flags & ACPI_FADT_NO_CMOS_RTC) { 957 pr_debug("ACPI: not registering RTC platform device\n"); 958 x86_platform.legacy.rtc = 0; 959 } 960 961 #ifdef CONFIG_X86_PM_TIMER 962 /* detect the location of the ACPI PM Timer */ 963 if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID) { 964 /* FADT rev. 2 */ 965 if (acpi_gbl_FADT.xpm_timer_block.space_id != 966 ACPI_ADR_SPACE_SYSTEM_IO) 967 return 0; 968 969 pmtmr_ioport = acpi_gbl_FADT.xpm_timer_block.address; 970 /* 971 * "X" fields are optional extensions to the original V1.0 972 * fields, so we must selectively expand V1.0 fields if the 973 * corresponding X field is zero. 974 */ 975 if (!pmtmr_ioport) 976 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block; 977 } else { 978 /* FADT rev. 1 */ 979 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block; 980 } 981 if (pmtmr_ioport) 982 printk(KERN_INFO PREFIX "PM-Timer IO Port: %#x\n", 983 pmtmr_ioport); 984 #endif 985 return 0; 986 } 987 988 #ifdef CONFIG_X86_LOCAL_APIC 989 /* 990 * Parse LAPIC entries in MADT 991 * returns 0 on success, < 0 on error 992 */ 993 994 static int __init early_acpi_parse_madt_lapic_addr_ovr(void) 995 { 996 int count; 997 998 if (!boot_cpu_has(X86_FEATURE_APIC)) 999 return -ENODEV; 1000 1001 /* 1002 * Note that the LAPIC address is obtained from the MADT (32-bit value) 1003 * and (optionally) overridden by a LAPIC_ADDR_OVR entry (64-bit value). 1004 */ 1005 1006 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE, 1007 acpi_parse_lapic_addr_ovr, 0); 1008 if (count < 0) { 1009 printk(KERN_ERR PREFIX 1010 "Error parsing LAPIC address override entry\n"); 1011 return count; 1012 } 1013 1014 register_lapic_address(acpi_lapic_addr); 1015 1016 return count; 1017 } 1018 1019 static int __init acpi_parse_madt_lapic_entries(void) 1020 { 1021 int count; 1022 int x2count = 0; 1023 int ret; 1024 struct acpi_subtable_proc madt_proc[2]; 1025 1026 if (!boot_cpu_has(X86_FEATURE_APIC)) 1027 return -ENODEV; 1028 1029 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC, 1030 acpi_parse_sapic, MAX_LOCAL_APIC); 1031 1032 if (!count) { 1033 memset(madt_proc, 0, sizeof(madt_proc)); 1034 madt_proc[0].id = ACPI_MADT_TYPE_LOCAL_APIC; 1035 madt_proc[0].handler = acpi_parse_lapic; 1036 madt_proc[1].id = ACPI_MADT_TYPE_LOCAL_X2APIC; 1037 madt_proc[1].handler = acpi_parse_x2apic; 1038 ret = acpi_table_parse_entries_array(ACPI_SIG_MADT, 1039 sizeof(struct acpi_table_madt), 1040 madt_proc, ARRAY_SIZE(madt_proc), MAX_LOCAL_APIC); 1041 if (ret < 0) { 1042 printk(KERN_ERR PREFIX 1043 "Error parsing LAPIC/X2APIC entries\n"); 1044 return ret; 1045 } 1046 1047 count = madt_proc[0].count; 1048 x2count = madt_proc[1].count; 1049 } 1050 if (!count && !x2count) { 1051 printk(KERN_ERR PREFIX "No LAPIC entries present\n"); 1052 /* TBD: Cleanup to allow fallback to MPS */ 1053 return -ENODEV; 1054 } else if (count < 0 || x2count < 0) { 1055 printk(KERN_ERR PREFIX "Error parsing LAPIC entry\n"); 1056 /* TBD: Cleanup to allow fallback to MPS */ 1057 return count; 1058 } 1059 1060 x2count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC_NMI, 1061 acpi_parse_x2apic_nmi, 0); 1062 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI, 1063 acpi_parse_lapic_nmi, 0); 1064 if (count < 0 || x2count < 0) { 1065 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n"); 1066 /* TBD: Cleanup to allow fallback to MPS */ 1067 return count; 1068 } 1069 return 0; 1070 } 1071 #endif /* CONFIG_X86_LOCAL_APIC */ 1072 1073 #ifdef CONFIG_X86_IO_APIC 1074 static void __init mp_config_acpi_legacy_irqs(void) 1075 { 1076 int i; 1077 struct mpc_intsrc mp_irq; 1078 1079 #ifdef CONFIG_EISA 1080 /* 1081 * Fabricate the legacy ISA bus (bus #31). 1082 */ 1083 mp_bus_id_to_type[MP_ISA_BUS] = MP_BUS_ISA; 1084 #endif 1085 set_bit(MP_ISA_BUS, mp_bus_not_pci); 1086 pr_debug("Bus #%d is ISA\n", MP_ISA_BUS); 1087 1088 /* 1089 * Use the default configuration for the IRQs 0-15. Unless 1090 * overridden by (MADT) interrupt source override entries. 1091 */ 1092 for (i = 0; i < nr_legacy_irqs(); i++) { 1093 int ioapic, pin; 1094 unsigned int dstapic; 1095 int idx; 1096 u32 gsi; 1097 1098 /* Locate the gsi that irq i maps to. */ 1099 if (acpi_isa_irq_to_gsi(i, &gsi)) 1100 continue; 1101 1102 /* 1103 * Locate the IOAPIC that manages the ISA IRQ. 1104 */ 1105 ioapic = mp_find_ioapic(gsi); 1106 if (ioapic < 0) 1107 continue; 1108 pin = mp_find_ioapic_pin(ioapic, gsi); 1109 dstapic = mpc_ioapic_id(ioapic); 1110 1111 for (idx = 0; idx < mp_irq_entries; idx++) { 1112 struct mpc_intsrc *irq = mp_irqs + idx; 1113 1114 /* Do we already have a mapping for this ISA IRQ? */ 1115 if (irq->srcbus == MP_ISA_BUS && irq->srcbusirq == i) 1116 break; 1117 1118 /* Do we already have a mapping for this IOAPIC pin */ 1119 if (irq->dstapic == dstapic && irq->dstirq == pin) 1120 break; 1121 } 1122 1123 if (idx != mp_irq_entries) { 1124 printk(KERN_DEBUG "ACPI: IRQ%d used by override.\n", i); 1125 continue; /* IRQ already used */ 1126 } 1127 1128 mp_irq.type = MP_INTSRC; 1129 mp_irq.irqflag = 0; /* Conforming */ 1130 mp_irq.srcbus = MP_ISA_BUS; 1131 mp_irq.dstapic = dstapic; 1132 mp_irq.irqtype = mp_INT; 1133 mp_irq.srcbusirq = i; /* Identity mapped */ 1134 mp_irq.dstirq = pin; 1135 1136 mp_save_irq(&mp_irq); 1137 } 1138 } 1139 1140 /* 1141 * Parse IOAPIC related entries in MADT 1142 * returns 0 on success, < 0 on error 1143 */ 1144 static int __init acpi_parse_madt_ioapic_entries(void) 1145 { 1146 int count; 1147 1148 /* 1149 * ACPI interpreter is required to complete interrupt setup, 1150 * so if it is off, don't enumerate the io-apics with ACPI. 1151 * If MPS is present, it will handle them, 1152 * otherwise the system will stay in PIC mode 1153 */ 1154 if (acpi_disabled || acpi_noirq) 1155 return -ENODEV; 1156 1157 if (!boot_cpu_has(X86_FEATURE_APIC)) 1158 return -ENODEV; 1159 1160 /* 1161 * if "noapic" boot option, don't look for IO-APICs 1162 */ 1163 if (skip_ioapic_setup) { 1164 printk(KERN_INFO PREFIX "Skipping IOAPIC probe " 1165 "due to 'noapic' option.\n"); 1166 return -ENODEV; 1167 } 1168 1169 count = acpi_table_parse_madt(ACPI_MADT_TYPE_IO_APIC, acpi_parse_ioapic, 1170 MAX_IO_APICS); 1171 if (!count) { 1172 printk(KERN_ERR PREFIX "No IOAPIC entries present\n"); 1173 return -ENODEV; 1174 } else if (count < 0) { 1175 printk(KERN_ERR PREFIX "Error parsing IOAPIC entry\n"); 1176 return count; 1177 } 1178 1179 count = acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE, 1180 acpi_parse_int_src_ovr, nr_irqs); 1181 if (count < 0) { 1182 printk(KERN_ERR PREFIX 1183 "Error parsing interrupt source overrides entry\n"); 1184 /* TBD: Cleanup to allow fallback to MPS */ 1185 return count; 1186 } 1187 1188 /* 1189 * If BIOS did not supply an INT_SRC_OVR for the SCI 1190 * pretend we got one so we can set the SCI flags. 1191 */ 1192 if (!acpi_sci_override_gsi) 1193 acpi_sci_ioapic_setup(acpi_gbl_FADT.sci_interrupt, 0, 0, 1194 acpi_gbl_FADT.sci_interrupt); 1195 1196 /* Fill in identity legacy mappings where no override */ 1197 mp_config_acpi_legacy_irqs(); 1198 1199 count = acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE, 1200 acpi_parse_nmi_src, nr_irqs); 1201 if (count < 0) { 1202 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n"); 1203 /* TBD: Cleanup to allow fallback to MPS */ 1204 return count; 1205 } 1206 1207 return 0; 1208 } 1209 #else 1210 static inline int acpi_parse_madt_ioapic_entries(void) 1211 { 1212 return -1; 1213 } 1214 #endif /* !CONFIG_X86_IO_APIC */ 1215 1216 static void __init early_acpi_process_madt(void) 1217 { 1218 #ifdef CONFIG_X86_LOCAL_APIC 1219 int error; 1220 1221 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) { 1222 1223 /* 1224 * Parse MADT LAPIC entries 1225 */ 1226 error = early_acpi_parse_madt_lapic_addr_ovr(); 1227 if (!error) { 1228 acpi_lapic = 1; 1229 smp_found_config = 1; 1230 } 1231 if (error == -EINVAL) { 1232 /* 1233 * Dell Precision Workstation 410, 610 come here. 1234 */ 1235 printk(KERN_ERR PREFIX 1236 "Invalid BIOS MADT, disabling ACPI\n"); 1237 disable_acpi(); 1238 } 1239 } 1240 #endif 1241 } 1242 1243 static void __init acpi_process_madt(void) 1244 { 1245 #ifdef CONFIG_X86_LOCAL_APIC 1246 int error; 1247 1248 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) { 1249 1250 /* 1251 * Parse MADT LAPIC entries 1252 */ 1253 error = acpi_parse_madt_lapic_entries(); 1254 if (!error) { 1255 acpi_lapic = 1; 1256 1257 /* 1258 * Parse MADT IO-APIC entries 1259 */ 1260 mutex_lock(&acpi_ioapic_lock); 1261 error = acpi_parse_madt_ioapic_entries(); 1262 mutex_unlock(&acpi_ioapic_lock); 1263 if (!error) { 1264 acpi_set_irq_model_ioapic(); 1265 1266 smp_found_config = 1; 1267 } 1268 } 1269 if (error == -EINVAL) { 1270 /* 1271 * Dell Precision Workstation 410, 610 come here. 1272 */ 1273 printk(KERN_ERR PREFIX 1274 "Invalid BIOS MADT, disabling ACPI\n"); 1275 disable_acpi(); 1276 } 1277 } else { 1278 /* 1279 * ACPI found no MADT, and so ACPI wants UP PIC mode. 1280 * In the event an MPS table was found, forget it. 1281 * Boot with "acpi=off" to use MPS on such a system. 1282 */ 1283 if (smp_found_config) { 1284 printk(KERN_WARNING PREFIX 1285 "No APIC-table, disabling MPS\n"); 1286 smp_found_config = 0; 1287 } 1288 } 1289 1290 /* 1291 * ACPI supports both logical (e.g. Hyper-Threading) and physical 1292 * processors, where MPS only supports physical. 1293 */ 1294 if (acpi_lapic && acpi_ioapic) 1295 printk(KERN_INFO "Using ACPI (MADT) for SMP configuration " 1296 "information\n"); 1297 else if (acpi_lapic) 1298 printk(KERN_INFO "Using ACPI for processor (LAPIC) " 1299 "configuration information\n"); 1300 #endif 1301 return; 1302 } 1303 1304 static int __init disable_acpi_irq(const struct dmi_system_id *d) 1305 { 1306 if (!acpi_force) { 1307 printk(KERN_NOTICE "%s detected: force use of acpi=noirq\n", 1308 d->ident); 1309 acpi_noirq_set(); 1310 } 1311 return 0; 1312 } 1313 1314 static int __init disable_acpi_pci(const struct dmi_system_id *d) 1315 { 1316 if (!acpi_force) { 1317 printk(KERN_NOTICE "%s detected: force use of pci=noacpi\n", 1318 d->ident); 1319 acpi_disable_pci(); 1320 } 1321 return 0; 1322 } 1323 1324 static int __init dmi_disable_acpi(const struct dmi_system_id *d) 1325 { 1326 if (!acpi_force) { 1327 printk(KERN_NOTICE "%s detected: acpi off\n", d->ident); 1328 disable_acpi(); 1329 } else { 1330 printk(KERN_NOTICE 1331 "Warning: DMI blacklist says broken, but acpi forced\n"); 1332 } 1333 return 0; 1334 } 1335 1336 /* 1337 * Force ignoring BIOS IRQ0 override 1338 */ 1339 static int __init dmi_ignore_irq0_timer_override(const struct dmi_system_id *d) 1340 { 1341 if (!acpi_skip_timer_override) { 1342 pr_notice("%s detected: Ignoring BIOS IRQ0 override\n", 1343 d->ident); 1344 acpi_skip_timer_override = 1; 1345 } 1346 return 0; 1347 } 1348 1349 /* 1350 * ACPI offers an alternative platform interface model that removes 1351 * ACPI hardware requirements for platforms that do not implement 1352 * the PC Architecture. 1353 * 1354 * We initialize the Hardware-reduced ACPI model here: 1355 */ 1356 static void __init acpi_reduced_hw_init(void) 1357 { 1358 if (acpi_gbl_reduced_hardware) { 1359 /* 1360 * Override x86_init functions and bypass legacy pic 1361 * in Hardware-reduced ACPI mode 1362 */ 1363 x86_init.timers.timer_init = x86_init_noop; 1364 x86_init.irqs.pre_vector_init = x86_init_noop; 1365 legacy_pic = &null_legacy_pic; 1366 } 1367 } 1368 1369 /* 1370 * If your system is blacklisted here, but you find that acpi=force 1371 * works for you, please contact linux-acpi@vger.kernel.org 1372 */ 1373 static struct dmi_system_id __initdata acpi_dmi_table[] = { 1374 /* 1375 * Boxes that need ACPI disabled 1376 */ 1377 { 1378 .callback = dmi_disable_acpi, 1379 .ident = "IBM Thinkpad", 1380 .matches = { 1381 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), 1382 DMI_MATCH(DMI_BOARD_NAME, "2629H1G"), 1383 }, 1384 }, 1385 1386 /* 1387 * Boxes that need ACPI PCI IRQ routing disabled 1388 */ 1389 { 1390 .callback = disable_acpi_irq, 1391 .ident = "ASUS A7V", 1392 .matches = { 1393 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC"), 1394 DMI_MATCH(DMI_BOARD_NAME, "<A7V>"), 1395 /* newer BIOS, Revision 1011, does work */ 1396 DMI_MATCH(DMI_BIOS_VERSION, 1397 "ASUS A7V ACPI BIOS Revision 1007"), 1398 }, 1399 }, 1400 { 1401 /* 1402 * Latest BIOS for IBM 600E (1.16) has bad pcinum 1403 * for LPC bridge, which is needed for the PCI 1404 * interrupt links to work. DSDT fix is in bug 5966. 1405 * 2645, 2646 model numbers are shared with 600/600E/600X 1406 */ 1407 .callback = disable_acpi_irq, 1408 .ident = "IBM Thinkpad 600 Series 2645", 1409 .matches = { 1410 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), 1411 DMI_MATCH(DMI_BOARD_NAME, "2645"), 1412 }, 1413 }, 1414 { 1415 .callback = disable_acpi_irq, 1416 .ident = "IBM Thinkpad 600 Series 2646", 1417 .matches = { 1418 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), 1419 DMI_MATCH(DMI_BOARD_NAME, "2646"), 1420 }, 1421 }, 1422 /* 1423 * Boxes that need ACPI PCI IRQ routing and PCI scan disabled 1424 */ 1425 { /* _BBN 0 bug */ 1426 .callback = disable_acpi_pci, 1427 .ident = "ASUS PR-DLS", 1428 .matches = { 1429 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."), 1430 DMI_MATCH(DMI_BOARD_NAME, "PR-DLS"), 1431 DMI_MATCH(DMI_BIOS_VERSION, 1432 "ASUS PR-DLS ACPI BIOS Revision 1010"), 1433 DMI_MATCH(DMI_BIOS_DATE, "03/21/2003") 1434 }, 1435 }, 1436 { 1437 .callback = disable_acpi_pci, 1438 .ident = "Acer TravelMate 36x Laptop", 1439 .matches = { 1440 DMI_MATCH(DMI_SYS_VENDOR, "Acer"), 1441 DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"), 1442 }, 1443 }, 1444 {} 1445 }; 1446 1447 /* second table for DMI checks that should run after early-quirks */ 1448 static struct dmi_system_id __initdata acpi_dmi_table_late[] = { 1449 /* 1450 * HP laptops which use a DSDT reporting as HP/SB400/10000, 1451 * which includes some code which overrides all temperature 1452 * trip points to 16C if the INTIN2 input of the I/O APIC 1453 * is enabled. This input is incorrectly designated the 1454 * ISA IRQ 0 via an interrupt source override even though 1455 * it is wired to the output of the master 8259A and INTIN0 1456 * is not connected at all. Force ignoring BIOS IRQ0 1457 * override in that cases. 1458 */ 1459 { 1460 .callback = dmi_ignore_irq0_timer_override, 1461 .ident = "HP nx6115 laptop", 1462 .matches = { 1463 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 1464 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6115"), 1465 }, 1466 }, 1467 { 1468 .callback = dmi_ignore_irq0_timer_override, 1469 .ident = "HP NX6125 laptop", 1470 .matches = { 1471 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 1472 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6125"), 1473 }, 1474 }, 1475 { 1476 .callback = dmi_ignore_irq0_timer_override, 1477 .ident = "HP NX6325 laptop", 1478 .matches = { 1479 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 1480 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6325"), 1481 }, 1482 }, 1483 { 1484 .callback = dmi_ignore_irq0_timer_override, 1485 .ident = "HP 6715b laptop", 1486 .matches = { 1487 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 1488 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq 6715b"), 1489 }, 1490 }, 1491 { 1492 .callback = dmi_ignore_irq0_timer_override, 1493 .ident = "FUJITSU SIEMENS", 1494 .matches = { 1495 DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"), 1496 DMI_MATCH(DMI_PRODUCT_NAME, "AMILO PRO V2030"), 1497 }, 1498 }, 1499 {} 1500 }; 1501 1502 /* 1503 * acpi_boot_table_init() and acpi_boot_init() 1504 * called from setup_arch(), always. 1505 * 1. checksums all tables 1506 * 2. enumerates lapics 1507 * 3. enumerates io-apics 1508 * 1509 * acpi_table_init() is separate to allow reading SRAT without 1510 * other side effects. 1511 * 1512 * side effects of acpi_boot_init: 1513 * acpi_lapic = 1 if LAPIC found 1514 * acpi_ioapic = 1 if IOAPIC found 1515 * if (acpi_lapic && acpi_ioapic) smp_found_config = 1; 1516 * if acpi_blacklisted() acpi_disabled = 1; 1517 * acpi_irq_model=... 1518 * ... 1519 */ 1520 1521 void __init acpi_boot_table_init(void) 1522 { 1523 dmi_check_system(acpi_dmi_table); 1524 1525 /* 1526 * If acpi_disabled, bail out 1527 */ 1528 if (acpi_disabled) 1529 return; 1530 1531 /* 1532 * Initialize the ACPI boot-time table parser. 1533 */ 1534 if (acpi_table_init()) { 1535 disable_acpi(); 1536 return; 1537 } 1538 1539 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf); 1540 1541 /* 1542 * blacklist may disable ACPI entirely 1543 */ 1544 if (acpi_blacklisted()) { 1545 if (acpi_force) { 1546 printk(KERN_WARNING PREFIX "acpi=force override\n"); 1547 } else { 1548 printk(KERN_WARNING PREFIX "Disabling ACPI support\n"); 1549 disable_acpi(); 1550 return; 1551 } 1552 } 1553 } 1554 1555 int __init early_acpi_boot_init(void) 1556 { 1557 /* 1558 * If acpi_disabled, bail out 1559 */ 1560 if (acpi_disabled) 1561 return 1; 1562 1563 /* 1564 * Process the Multiple APIC Description Table (MADT), if present 1565 */ 1566 early_acpi_process_madt(); 1567 1568 /* 1569 * Hardware-reduced ACPI mode initialization: 1570 */ 1571 acpi_reduced_hw_init(); 1572 1573 return 0; 1574 } 1575 1576 int __init acpi_boot_init(void) 1577 { 1578 /* those are executed after early-quirks are executed */ 1579 dmi_check_system(acpi_dmi_table_late); 1580 1581 /* 1582 * If acpi_disabled, bail out 1583 */ 1584 if (acpi_disabled) 1585 return 1; 1586 1587 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf); 1588 1589 /* 1590 * set sci_int and PM timer address 1591 */ 1592 acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt); 1593 1594 /* 1595 * Process the Multiple APIC Description Table (MADT), if present 1596 */ 1597 acpi_process_madt(); 1598 1599 acpi_table_parse(ACPI_SIG_HPET, acpi_parse_hpet); 1600 if (IS_ENABLED(CONFIG_ACPI_BGRT)) 1601 acpi_table_parse(ACPI_SIG_BGRT, acpi_parse_bgrt); 1602 1603 if (!acpi_noirq) 1604 x86_init.pci.init = pci_acpi_init; 1605 1606 return 0; 1607 } 1608 1609 static int __init parse_acpi(char *arg) 1610 { 1611 if (!arg) 1612 return -EINVAL; 1613 1614 /* "acpi=off" disables both ACPI table parsing and interpreter */ 1615 if (strcmp(arg, "off") == 0) { 1616 disable_acpi(); 1617 } 1618 /* acpi=force to over-ride black-list */ 1619 else if (strcmp(arg, "force") == 0) { 1620 acpi_force = 1; 1621 acpi_disabled = 0; 1622 } 1623 /* acpi=strict disables out-of-spec workarounds */ 1624 else if (strcmp(arg, "strict") == 0) { 1625 acpi_strict = 1; 1626 } 1627 /* acpi=rsdt use RSDT instead of XSDT */ 1628 else if (strcmp(arg, "rsdt") == 0) { 1629 acpi_gbl_do_not_use_xsdt = TRUE; 1630 } 1631 /* "acpi=noirq" disables ACPI interrupt routing */ 1632 else if (strcmp(arg, "noirq") == 0) { 1633 acpi_noirq_set(); 1634 } 1635 /* "acpi=copy_dsdt" copys DSDT */ 1636 else if (strcmp(arg, "copy_dsdt") == 0) { 1637 acpi_gbl_copy_dsdt_locally = 1; 1638 } 1639 /* "acpi=nocmcff" disables FF mode for corrected errors */ 1640 else if (strcmp(arg, "nocmcff") == 0) { 1641 acpi_disable_cmcff = 1; 1642 } else { 1643 /* Core will printk when we return error. */ 1644 return -EINVAL; 1645 } 1646 return 0; 1647 } 1648 early_param("acpi", parse_acpi); 1649 1650 /* FIXME: Using pci= for an ACPI parameter is a travesty. */ 1651 static int __init parse_pci(char *arg) 1652 { 1653 if (arg && strcmp(arg, "noacpi") == 0) 1654 acpi_disable_pci(); 1655 return 0; 1656 } 1657 early_param("pci", parse_pci); 1658 1659 int __init acpi_mps_check(void) 1660 { 1661 #if defined(CONFIG_X86_LOCAL_APIC) && !defined(CONFIG_X86_MPPARSE) 1662 /* mptable code is not built-in*/ 1663 if (acpi_disabled || acpi_noirq) { 1664 printk(KERN_WARNING "MPS support code is not built-in.\n" 1665 "Using acpi=off or acpi=noirq or pci=noacpi " 1666 "may have problem\n"); 1667 return 1; 1668 } 1669 #endif 1670 return 0; 1671 } 1672 1673 #ifdef CONFIG_X86_IO_APIC 1674 static int __init parse_acpi_skip_timer_override(char *arg) 1675 { 1676 acpi_skip_timer_override = 1; 1677 return 0; 1678 } 1679 early_param("acpi_skip_timer_override", parse_acpi_skip_timer_override); 1680 1681 static int __init parse_acpi_use_timer_override(char *arg) 1682 { 1683 acpi_use_timer_override = 1; 1684 return 0; 1685 } 1686 early_param("acpi_use_timer_override", parse_acpi_use_timer_override); 1687 #endif /* CONFIG_X86_IO_APIC */ 1688 1689 static int __init setup_acpi_sci(char *s) 1690 { 1691 if (!s) 1692 return -EINVAL; 1693 if (!strcmp(s, "edge")) 1694 acpi_sci_flags = ACPI_MADT_TRIGGER_EDGE | 1695 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK); 1696 else if (!strcmp(s, "level")) 1697 acpi_sci_flags = ACPI_MADT_TRIGGER_LEVEL | 1698 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK); 1699 else if (!strcmp(s, "high")) 1700 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_HIGH | 1701 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK); 1702 else if (!strcmp(s, "low")) 1703 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_LOW | 1704 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK); 1705 else 1706 return -EINVAL; 1707 return 0; 1708 } 1709 early_param("acpi_sci", setup_acpi_sci); 1710 1711 int __acpi_acquire_global_lock(unsigned int *lock) 1712 { 1713 unsigned int old, new, val; 1714 do { 1715 old = *lock; 1716 new = (((old & ~0x3) + 2) + ((old >> 1) & 0x1)); 1717 val = cmpxchg(lock, old, new); 1718 } while (unlikely (val != old)); 1719 return (new < 3) ? -1 : 0; 1720 } 1721 1722 int __acpi_release_global_lock(unsigned int *lock) 1723 { 1724 unsigned int old, new, val; 1725 do { 1726 old = *lock; 1727 new = old & ~0x3; 1728 val = cmpxchg(lock, old, new); 1729 } while (unlikely (val != old)); 1730 return old & 0x1; 1731 } 1732 1733 void __init arch_reserve_mem_area(acpi_physical_address addr, size_t size) 1734 { 1735 e820__range_add(addr, size, E820_TYPE_ACPI); 1736 e820__update_table_print(); 1737 } 1738