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