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/irqdomain.h> 41 #include <asm/pci_x86.h> 42 #include <asm/pgtable.h> 43 #include <asm/io_apic.h> 44 #include <asm/apic.h> 45 #include <asm/io.h> 46 #include <asm/mpspec.h> 47 #include <asm/smp.h> 48 #include <asm/i8259.h> 49 50 #include "sleep.h" /* To include x86_acpi_suspend_lowlevel */ 51 static int __initdata acpi_force = 0; 52 int acpi_disabled; 53 EXPORT_SYMBOL(acpi_disabled); 54 55 #ifdef CONFIG_X86_64 56 # include <asm/proto.h> 57 #endif /* X86 */ 58 59 #define PREFIX "ACPI: " 60 61 int acpi_noirq; /* skip ACPI IRQ initialization */ 62 int acpi_pci_disabled; /* skip ACPI PCI scan and IRQ initialization */ 63 EXPORT_SYMBOL(acpi_pci_disabled); 64 65 int acpi_lapic; 66 int acpi_ioapic; 67 int acpi_strict; 68 int acpi_disable_cmcff; 69 70 u8 acpi_sci_flags __initdata; 71 int acpi_sci_override_gsi __initdata; 72 int acpi_skip_timer_override __initdata; 73 int acpi_use_timer_override __initdata; 74 int acpi_fix_pin2_polarity __initdata; 75 76 #ifdef CONFIG_X86_LOCAL_APIC 77 static u64 acpi_lapic_addr __initdata = APIC_DEFAULT_PHYS_BASE; 78 #endif 79 80 #ifdef CONFIG_X86_IO_APIC 81 /* 82 * Locks related to IOAPIC hotplug 83 * Hotplug side: 84 * ->device_hotplug_lock 85 * ->acpi_ioapic_lock 86 * ->ioapic_lock 87 * Interrupt mapping side: 88 * ->acpi_ioapic_lock 89 * ->ioapic_mutex 90 * ->ioapic_lock 91 */ 92 static DEFINE_MUTEX(acpi_ioapic_lock); 93 #endif 94 95 /* -------------------------------------------------------------------------- 96 Boot-time Configuration 97 -------------------------------------------------------------------------- */ 98 99 /* 100 * The default interrupt routing model is PIC (8259). This gets 101 * overridden if IOAPICs are enumerated (below). 102 */ 103 enum acpi_irq_model_id acpi_irq_model = ACPI_IRQ_MODEL_PIC; 104 105 106 /* 107 * ISA irqs by default are the first 16 gsis but can be 108 * any gsi as specified by an interrupt source override. 109 */ 110 static u32 isa_irq_to_gsi[NR_IRQS_LEGACY] __read_mostly = { 111 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 112 }; 113 114 #define ACPI_INVALID_GSI INT_MIN 115 116 /* 117 * This is just a simple wrapper around early_ioremap(), 118 * with sanity checks for phys == 0 and size == 0. 119 */ 120 char *__init __acpi_map_table(unsigned long phys, unsigned long size) 121 { 122 123 if (!phys || !size) 124 return NULL; 125 126 return early_ioremap(phys, size); 127 } 128 129 void __init __acpi_unmap_table(char *map, unsigned long size) 130 { 131 if (!map || !size) 132 return; 133 134 early_iounmap(map, size); 135 } 136 137 #ifdef CONFIG_X86_LOCAL_APIC 138 static int __init acpi_parse_madt(struct acpi_table_header *table) 139 { 140 struct acpi_table_madt *madt = NULL; 141 142 if (!boot_cpu_has(X86_FEATURE_APIC)) 143 return -EINVAL; 144 145 madt = (struct acpi_table_madt *)table; 146 if (!madt) { 147 printk(KERN_WARNING PREFIX "Unable to map MADT\n"); 148 return -ENODEV; 149 } 150 151 if (madt->address) { 152 acpi_lapic_addr = (u64) madt->address; 153 154 printk(KERN_DEBUG PREFIX "Local APIC address 0x%08x\n", 155 madt->address); 156 } 157 158 default_acpi_madt_oem_check(madt->header.oem_id, 159 madt->header.oem_table_id); 160 161 return 0; 162 } 163 164 /** 165 * acpi_register_lapic - register a local apic and generates a logic cpu number 166 * @id: local apic id to register 167 * @acpiid: ACPI id to register 168 * @enabled: this cpu is enabled or not 169 * 170 * Returns the logic cpu number which maps to the local apic 171 */ 172 static int acpi_register_lapic(int id, u32 acpiid, u8 enabled) 173 { 174 unsigned int ver = 0; 175 int cpu; 176 177 if (id >= MAX_LOCAL_APIC) { 178 printk(KERN_INFO PREFIX "skipped apicid that is too big\n"); 179 return -EINVAL; 180 } 181 182 if (boot_cpu_physical_apicid != -1U) 183 ver = boot_cpu_apic_version; 184 185 cpu = __generic_processor_info(id, ver, enabled); 186 if (cpu >= 0) 187 early_per_cpu(x86_cpu_to_acpiid, cpu) = acpiid; 188 189 return cpu; 190 } 191 192 static int __init 193 acpi_parse_x2apic(struct acpi_subtable_header *header, const unsigned long end) 194 { 195 struct acpi_madt_local_x2apic *processor = NULL; 196 int apic_id; 197 u8 enabled; 198 199 processor = (struct acpi_madt_local_x2apic *)header; 200 201 if (BAD_MADT_ENTRY(processor, end)) 202 return -EINVAL; 203 204 acpi_table_print_madt_entry(header); 205 206 apic_id = processor->local_apic_id; 207 enabled = processor->lapic_flags & ACPI_MADT_ENABLED; 208 #ifdef CONFIG_X86_X2APIC 209 /* 210 * We need to register disabled CPU as well to permit 211 * counting disabled CPUs. This allows us to size 212 * cpus_possible_map more accurately, to permit 213 * to not preallocating memory for all NR_CPUS 214 * when we use CPU hotplug. 215 */ 216 if (!apic->apic_id_valid(apic_id) && enabled) 217 printk(KERN_WARNING PREFIX "x2apic entry ignored\n"); 218 else 219 acpi_register_lapic(apic_id, processor->uid, enabled); 220 #else 221 printk(KERN_WARNING PREFIX "x2apic entry ignored\n"); 222 #endif 223 224 return 0; 225 } 226 227 static int __init 228 acpi_parse_lapic(struct acpi_subtable_header * header, const unsigned long end) 229 { 230 struct acpi_madt_local_apic *processor = NULL; 231 232 processor = (struct acpi_madt_local_apic *)header; 233 234 if (BAD_MADT_ENTRY(processor, end)) 235 return -EINVAL; 236 237 acpi_table_print_madt_entry(header); 238 239 /* Ignore invalid ID */ 240 if (processor->id == 0xff) 241 return 0; 242 243 /* 244 * We need to register disabled CPU as well to permit 245 * counting disabled CPUs. This allows us to size 246 * cpus_possible_map more accurately, to permit 247 * to not preallocating memory for all NR_CPUS 248 * when we use CPU hotplug. 249 */ 250 acpi_register_lapic(processor->id, /* APIC ID */ 251 processor->processor_id, /* ACPI ID */ 252 processor->lapic_flags & ACPI_MADT_ENABLED); 253 254 return 0; 255 } 256 257 static int __init 258 acpi_parse_sapic(struct acpi_subtable_header *header, const unsigned long end) 259 { 260 struct acpi_madt_local_sapic *processor = NULL; 261 262 processor = (struct acpi_madt_local_sapic *)header; 263 264 if (BAD_MADT_ENTRY(processor, end)) 265 return -EINVAL; 266 267 acpi_table_print_madt_entry(header); 268 269 acpi_register_lapic((processor->id << 8) | processor->eid,/* APIC ID */ 270 processor->processor_id, /* ACPI ID */ 271 processor->lapic_flags & ACPI_MADT_ENABLED); 272 273 return 0; 274 } 275 276 static int __init 277 acpi_parse_lapic_addr_ovr(struct acpi_subtable_header * header, 278 const unsigned long end) 279 { 280 struct acpi_madt_local_apic_override *lapic_addr_ovr = NULL; 281 282 lapic_addr_ovr = (struct acpi_madt_local_apic_override *)header; 283 284 if (BAD_MADT_ENTRY(lapic_addr_ovr, end)) 285 return -EINVAL; 286 287 acpi_table_print_madt_entry(header); 288 289 acpi_lapic_addr = lapic_addr_ovr->address; 290 291 return 0; 292 } 293 294 static int __init 295 acpi_parse_x2apic_nmi(struct acpi_subtable_header *header, 296 const unsigned long end) 297 { 298 struct acpi_madt_local_x2apic_nmi *x2apic_nmi = NULL; 299 300 x2apic_nmi = (struct acpi_madt_local_x2apic_nmi *)header; 301 302 if (BAD_MADT_ENTRY(x2apic_nmi, end)) 303 return -EINVAL; 304 305 acpi_table_print_madt_entry(header); 306 307 if (x2apic_nmi->lint != 1) 308 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n"); 309 310 return 0; 311 } 312 313 static int __init 314 acpi_parse_lapic_nmi(struct acpi_subtable_header * header, const unsigned long end) 315 { 316 struct acpi_madt_local_apic_nmi *lapic_nmi = NULL; 317 318 lapic_nmi = (struct acpi_madt_local_apic_nmi *)header; 319 320 if (BAD_MADT_ENTRY(lapic_nmi, end)) 321 return -EINVAL; 322 323 acpi_table_print_madt_entry(header); 324 325 if (lapic_nmi->lint != 1) 326 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n"); 327 328 return 0; 329 } 330 331 #endif /*CONFIG_X86_LOCAL_APIC */ 332 333 #ifdef CONFIG_X86_IO_APIC 334 #define MP_ISA_BUS 0 335 336 static void __init mp_override_legacy_irq(u8 bus_irq, u8 polarity, u8 trigger, 337 u32 gsi) 338 { 339 int ioapic; 340 int pin; 341 struct mpc_intsrc mp_irq; 342 343 /* 344 * Convert 'gsi' to 'ioapic.pin'. 345 */ 346 ioapic = mp_find_ioapic(gsi); 347 if (ioapic < 0) 348 return; 349 pin = mp_find_ioapic_pin(ioapic, gsi); 350 351 /* 352 * TBD: This check is for faulty timer entries, where the override 353 * erroneously sets the trigger to level, resulting in a HUGE 354 * increase of timer interrupts! 355 */ 356 if ((bus_irq == 0) && (trigger == 3)) 357 trigger = 1; 358 359 mp_irq.type = MP_INTSRC; 360 mp_irq.irqtype = mp_INT; 361 mp_irq.irqflag = (trigger << 2) | polarity; 362 mp_irq.srcbus = MP_ISA_BUS; 363 mp_irq.srcbusirq = bus_irq; /* IRQ */ 364 mp_irq.dstapic = mpc_ioapic_id(ioapic); /* APIC ID */ 365 mp_irq.dstirq = pin; /* INTIN# */ 366 367 mp_save_irq(&mp_irq); 368 369 /* 370 * Reset default identity mapping if gsi is also an legacy IRQ, 371 * otherwise there will be more than one entry with the same GSI 372 * and acpi_isa_irq_to_gsi() may give wrong result. 373 */ 374 if (gsi < nr_legacy_irqs() && isa_irq_to_gsi[gsi] == gsi) 375 isa_irq_to_gsi[gsi] = ACPI_INVALID_GSI; 376 isa_irq_to_gsi[bus_irq] = gsi; 377 } 378 379 static int mp_config_acpi_gsi(struct device *dev, u32 gsi, int trigger, 380 int polarity) 381 { 382 #ifdef CONFIG_X86_MPPARSE 383 struct mpc_intsrc mp_irq; 384 struct pci_dev *pdev; 385 unsigned char number; 386 unsigned int devfn; 387 int ioapic; 388 u8 pin; 389 390 if (!acpi_ioapic) 391 return 0; 392 if (!dev || !dev_is_pci(dev)) 393 return 0; 394 395 pdev = to_pci_dev(dev); 396 number = pdev->bus->number; 397 devfn = pdev->devfn; 398 pin = pdev->pin; 399 /* print the entry should happen on mptable identically */ 400 mp_irq.type = MP_INTSRC; 401 mp_irq.irqtype = mp_INT; 402 mp_irq.irqflag = (trigger == ACPI_EDGE_SENSITIVE ? 4 : 0x0c) | 403 (polarity == ACPI_ACTIVE_HIGH ? 1 : 3); 404 mp_irq.srcbus = number; 405 mp_irq.srcbusirq = (((devfn >> 3) & 0x1f) << 2) | ((pin - 1) & 3); 406 ioapic = mp_find_ioapic(gsi); 407 mp_irq.dstapic = mpc_ioapic_id(ioapic); 408 mp_irq.dstirq = mp_find_ioapic_pin(ioapic, gsi); 409 410 mp_save_irq(&mp_irq); 411 #endif 412 return 0; 413 } 414 415 static int __init 416 acpi_parse_ioapic(struct acpi_subtable_header * header, const unsigned long end) 417 { 418 struct acpi_madt_io_apic *ioapic = NULL; 419 struct ioapic_domain_cfg cfg = { 420 .type = IOAPIC_DOMAIN_DYNAMIC, 421 .ops = &mp_ioapic_irqdomain_ops, 422 }; 423 424 ioapic = (struct acpi_madt_io_apic *)header; 425 426 if (BAD_MADT_ENTRY(ioapic, end)) 427 return -EINVAL; 428 429 acpi_table_print_madt_entry(header); 430 431 /* Statically assign IRQ numbers for IOAPICs hosting legacy IRQs */ 432 if (ioapic->global_irq_base < nr_legacy_irqs()) 433 cfg.type = IOAPIC_DOMAIN_LEGACY; 434 435 mp_register_ioapic(ioapic->id, ioapic->address, ioapic->global_irq_base, 436 &cfg); 437 438 return 0; 439 } 440 441 /* 442 * Parse Interrupt Source Override for the ACPI SCI 443 */ 444 static void __init acpi_sci_ioapic_setup(u8 bus_irq, u16 polarity, u16 trigger, u32 gsi) 445 { 446 if (trigger == 0) /* compatible SCI trigger is level */ 447 trigger = 3; 448 449 if (polarity == 0) /* compatible SCI polarity is low */ 450 polarity = 3; 451 452 /* Command-line over-ride via acpi_sci= */ 453 if (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) 454 trigger = (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2; 455 456 if (acpi_sci_flags & ACPI_MADT_POLARITY_MASK) 457 polarity = acpi_sci_flags & ACPI_MADT_POLARITY_MASK; 458 459 mp_override_legacy_irq(bus_irq, polarity, trigger, gsi); 460 acpi_penalize_sci_irq(bus_irq, trigger, polarity); 461 462 /* 463 * stash over-ride to indicate we've been here 464 * and for later update of acpi_gbl_FADT 465 */ 466 acpi_sci_override_gsi = gsi; 467 return; 468 } 469 470 static int __init 471 acpi_parse_int_src_ovr(struct acpi_subtable_header * header, 472 const unsigned long end) 473 { 474 struct acpi_madt_interrupt_override *intsrc = NULL; 475 476 intsrc = (struct acpi_madt_interrupt_override *)header; 477 478 if (BAD_MADT_ENTRY(intsrc, end)) 479 return -EINVAL; 480 481 acpi_table_print_madt_entry(header); 482 483 if (intsrc->source_irq == acpi_gbl_FADT.sci_interrupt) { 484 acpi_sci_ioapic_setup(intsrc->source_irq, 485 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK, 486 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2, 487 intsrc->global_irq); 488 return 0; 489 } 490 491 if (intsrc->source_irq == 0) { 492 if (acpi_skip_timer_override) { 493 printk(PREFIX "BIOS IRQ0 override ignored.\n"); 494 return 0; 495 } 496 497 if ((intsrc->global_irq == 2) && acpi_fix_pin2_polarity 498 && (intsrc->inti_flags & ACPI_MADT_POLARITY_MASK)) { 499 intsrc->inti_flags &= ~ACPI_MADT_POLARITY_MASK; 500 printk(PREFIX "BIOS IRQ0 pin2 override: forcing polarity to high active.\n"); 501 } 502 } 503 504 mp_override_legacy_irq(intsrc->source_irq, 505 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK, 506 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2, 507 intsrc->global_irq); 508 509 return 0; 510 } 511 512 static int __init 513 acpi_parse_nmi_src(struct acpi_subtable_header * header, const unsigned long end) 514 { 515 struct acpi_madt_nmi_source *nmi_src = NULL; 516 517 nmi_src = (struct acpi_madt_nmi_source *)header; 518 519 if (BAD_MADT_ENTRY(nmi_src, end)) 520 return -EINVAL; 521 522 acpi_table_print_madt_entry(header); 523 524 /* TBD: Support nimsrc entries? */ 525 526 return 0; 527 } 528 529 #endif /* CONFIG_X86_IO_APIC */ 530 531 /* 532 * acpi_pic_sci_set_trigger() 533 * 534 * use ELCR to set PIC-mode trigger type for SCI 535 * 536 * If a PIC-mode SCI is not recognized or gives spurious IRQ7's 537 * it may require Edge Trigger -- use "acpi_sci=edge" 538 * 539 * Port 0x4d0-4d1 are ECLR1 and ECLR2, the Edge/Level Control Registers 540 * for the 8259 PIC. bit[n] = 1 means irq[n] is Level, otherwise Edge. 541 * ECLR1 is IRQs 0-7 (IRQ 0, 1, 2 must be 0) 542 * ECLR2 is IRQs 8-15 (IRQ 8, 13 must be 0) 543 */ 544 545 void __init acpi_pic_sci_set_trigger(unsigned int irq, u16 trigger) 546 { 547 unsigned int mask = 1 << irq; 548 unsigned int old, new; 549 550 /* Real old ELCR mask */ 551 old = inb(0x4d0) | (inb(0x4d1) << 8); 552 553 /* 554 * If we use ACPI to set PCI IRQs, then we should clear ELCR 555 * since we will set it correctly as we enable the PCI irq 556 * routing. 557 */ 558 new = acpi_noirq ? old : 0; 559 560 /* 561 * Update SCI information in the ELCR, it isn't in the PCI 562 * routing tables.. 563 */ 564 switch (trigger) { 565 case 1: /* Edge - clear */ 566 new &= ~mask; 567 break; 568 case 3: /* Level - set */ 569 new |= mask; 570 break; 571 } 572 573 if (old == new) 574 return; 575 576 printk(PREFIX "setting ELCR to %04x (from %04x)\n", new, old); 577 outb(new, 0x4d0); 578 outb(new >> 8, 0x4d1); 579 } 580 581 int acpi_gsi_to_irq(u32 gsi, unsigned int *irqp) 582 { 583 int rc, irq, trigger, polarity; 584 585 if (acpi_irq_model == ACPI_IRQ_MODEL_PIC) { 586 *irqp = gsi; 587 return 0; 588 } 589 590 rc = acpi_get_override_irq(gsi, &trigger, &polarity); 591 if (rc == 0) { 592 trigger = trigger ? ACPI_LEVEL_SENSITIVE : ACPI_EDGE_SENSITIVE; 593 polarity = polarity ? ACPI_ACTIVE_LOW : ACPI_ACTIVE_HIGH; 594 irq = acpi_register_gsi(NULL, gsi, trigger, polarity); 595 if (irq >= 0) { 596 *irqp = irq; 597 return 0; 598 } 599 } 600 601 return -1; 602 } 603 EXPORT_SYMBOL_GPL(acpi_gsi_to_irq); 604 605 int acpi_isa_irq_to_gsi(unsigned isa_irq, u32 *gsi) 606 { 607 if (isa_irq < nr_legacy_irqs() && 608 isa_irq_to_gsi[isa_irq] != ACPI_INVALID_GSI) { 609 *gsi = isa_irq_to_gsi[isa_irq]; 610 return 0; 611 } 612 613 return -1; 614 } 615 616 static int acpi_register_gsi_pic(struct device *dev, u32 gsi, 617 int trigger, int polarity) 618 { 619 #ifdef CONFIG_PCI 620 /* 621 * Make sure all (legacy) PCI IRQs are set as level-triggered. 622 */ 623 if (trigger == ACPI_LEVEL_SENSITIVE) 624 elcr_set_level_irq(gsi); 625 #endif 626 627 return gsi; 628 } 629 630 #ifdef CONFIG_X86_LOCAL_APIC 631 static int acpi_register_gsi_ioapic(struct device *dev, u32 gsi, 632 int trigger, int polarity) 633 { 634 int irq = gsi; 635 #ifdef CONFIG_X86_IO_APIC 636 int node; 637 struct irq_alloc_info info; 638 639 node = dev ? dev_to_node(dev) : NUMA_NO_NODE; 640 trigger = trigger == ACPI_EDGE_SENSITIVE ? 0 : 1; 641 polarity = polarity == ACPI_ACTIVE_HIGH ? 0 : 1; 642 ioapic_set_alloc_attr(&info, node, trigger, polarity); 643 644 mutex_lock(&acpi_ioapic_lock); 645 irq = mp_map_gsi_to_irq(gsi, IOAPIC_MAP_ALLOC, &info); 646 /* Don't set up the ACPI SCI because it's already set up */ 647 if (irq >= 0 && enable_update_mptable && 648 acpi_gbl_FADT.sci_interrupt != gsi) 649 mp_config_acpi_gsi(dev, gsi, trigger, polarity); 650 mutex_unlock(&acpi_ioapic_lock); 651 #endif 652 653 return irq; 654 } 655 656 static void acpi_unregister_gsi_ioapic(u32 gsi) 657 { 658 #ifdef CONFIG_X86_IO_APIC 659 int irq; 660 661 mutex_lock(&acpi_ioapic_lock); 662 irq = mp_map_gsi_to_irq(gsi, 0, NULL); 663 if (irq > 0) 664 mp_unmap_irq(irq); 665 mutex_unlock(&acpi_ioapic_lock); 666 #endif 667 } 668 #endif 669 670 int (*__acpi_register_gsi)(struct device *dev, u32 gsi, 671 int trigger, int polarity) = acpi_register_gsi_pic; 672 void (*__acpi_unregister_gsi)(u32 gsi) = NULL; 673 674 #ifdef CONFIG_ACPI_SLEEP 675 int (*acpi_suspend_lowlevel)(void) = x86_acpi_suspend_lowlevel; 676 #else 677 int (*acpi_suspend_lowlevel)(void); 678 #endif 679 680 /* 681 * success: return IRQ number (>=0) 682 * failure: return < 0 683 */ 684 int acpi_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity) 685 { 686 return __acpi_register_gsi(dev, gsi, trigger, polarity); 687 } 688 EXPORT_SYMBOL_GPL(acpi_register_gsi); 689 690 void acpi_unregister_gsi(u32 gsi) 691 { 692 if (__acpi_unregister_gsi) 693 __acpi_unregister_gsi(gsi); 694 } 695 EXPORT_SYMBOL_GPL(acpi_unregister_gsi); 696 697 #ifdef CONFIG_X86_LOCAL_APIC 698 static void __init acpi_set_irq_model_ioapic(void) 699 { 700 acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC; 701 __acpi_register_gsi = acpi_register_gsi_ioapic; 702 __acpi_unregister_gsi = acpi_unregister_gsi_ioapic; 703 acpi_ioapic = 1; 704 } 705 #endif 706 707 /* 708 * ACPI based hotplug support for CPU 709 */ 710 #ifdef CONFIG_ACPI_HOTPLUG_CPU 711 #include <acpi/processor.h> 712 713 int acpi_map_cpu2node(acpi_handle handle, int cpu, int physid) 714 { 715 #ifdef CONFIG_ACPI_NUMA 716 int nid; 717 718 nid = acpi_get_node(handle); 719 if (nid != NUMA_NO_NODE) { 720 set_apicid_to_node(physid, nid); 721 numa_set_node(cpu, nid); 722 } 723 #endif 724 return 0; 725 } 726 727 int acpi_map_cpu(acpi_handle handle, phys_cpuid_t physid, u32 acpi_id, 728 int *pcpu) 729 { 730 int cpu; 731 732 cpu = acpi_register_lapic(physid, acpi_id, ACPI_MADT_ENABLED); 733 if (cpu < 0) { 734 pr_info(PREFIX "Unable to map lapic to logical cpu number\n"); 735 return cpu; 736 } 737 738 acpi_processor_set_pdc(handle); 739 acpi_map_cpu2node(handle, cpu, physid); 740 741 *pcpu = cpu; 742 return 0; 743 } 744 EXPORT_SYMBOL(acpi_map_cpu); 745 746 int acpi_unmap_cpu(int cpu) 747 { 748 #ifdef CONFIG_ACPI_NUMA 749 set_apicid_to_node(per_cpu(x86_cpu_to_apicid, cpu), NUMA_NO_NODE); 750 #endif 751 752 per_cpu(x86_cpu_to_apicid, cpu) = -1; 753 set_cpu_present(cpu, false); 754 num_processors--; 755 756 return (0); 757 } 758 EXPORT_SYMBOL(acpi_unmap_cpu); 759 #endif /* CONFIG_ACPI_HOTPLUG_CPU */ 760 761 int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base) 762 { 763 int ret = -ENOSYS; 764 #ifdef CONFIG_ACPI_HOTPLUG_IOAPIC 765 int ioapic_id; 766 u64 addr; 767 struct ioapic_domain_cfg cfg = { 768 .type = IOAPIC_DOMAIN_DYNAMIC, 769 .ops = &mp_ioapic_irqdomain_ops, 770 }; 771 772 ioapic_id = acpi_get_ioapic_id(handle, gsi_base, &addr); 773 if (ioapic_id < 0) { 774 unsigned long long uid; 775 acpi_status status; 776 777 status = acpi_evaluate_integer(handle, METHOD_NAME__UID, 778 NULL, &uid); 779 if (ACPI_FAILURE(status)) { 780 acpi_handle_warn(handle, "failed to get IOAPIC ID.\n"); 781 return -EINVAL; 782 } 783 ioapic_id = (int)uid; 784 } 785 786 mutex_lock(&acpi_ioapic_lock); 787 ret = mp_register_ioapic(ioapic_id, phys_addr, gsi_base, &cfg); 788 mutex_unlock(&acpi_ioapic_lock); 789 #endif 790 791 return ret; 792 } 793 EXPORT_SYMBOL(acpi_register_ioapic); 794 795 int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base) 796 { 797 int ret = -ENOSYS; 798 799 #ifdef CONFIG_ACPI_HOTPLUG_IOAPIC 800 mutex_lock(&acpi_ioapic_lock); 801 ret = mp_unregister_ioapic(gsi_base); 802 mutex_unlock(&acpi_ioapic_lock); 803 #endif 804 805 return ret; 806 } 807 EXPORT_SYMBOL(acpi_unregister_ioapic); 808 809 /** 810 * acpi_ioapic_registered - Check whether IOAPIC assoicatied with @gsi_base 811 * has been registered 812 * @handle: ACPI handle of the IOAPIC deivce 813 * @gsi_base: GSI base associated with the IOAPIC 814 * 815 * Assume caller holds some type of lock to serialize acpi_ioapic_registered() 816 * with acpi_register_ioapic()/acpi_unregister_ioapic(). 817 */ 818 int acpi_ioapic_registered(acpi_handle handle, u32 gsi_base) 819 { 820 int ret = 0; 821 822 #ifdef CONFIG_ACPI_HOTPLUG_IOAPIC 823 mutex_lock(&acpi_ioapic_lock); 824 ret = mp_ioapic_registered(gsi_base); 825 mutex_unlock(&acpi_ioapic_lock); 826 #endif 827 828 return ret; 829 } 830 831 static int __init acpi_parse_sbf(struct acpi_table_header *table) 832 { 833 struct acpi_table_boot *sb = (struct acpi_table_boot *)table; 834 835 sbf_port = sb->cmos_index; /* Save CMOS port */ 836 837 return 0; 838 } 839 840 #ifdef CONFIG_HPET_TIMER 841 #include <asm/hpet.h> 842 843 static struct resource *hpet_res __initdata; 844 845 static int __init acpi_parse_hpet(struct acpi_table_header *table) 846 { 847 struct acpi_table_hpet *hpet_tbl = (struct acpi_table_hpet *)table; 848 849 if (hpet_tbl->address.space_id != ACPI_SPACE_MEM) { 850 printk(KERN_WARNING PREFIX "HPET timers must be located in " 851 "memory.\n"); 852 return -1; 853 } 854 855 hpet_address = hpet_tbl->address.address; 856 hpet_blockid = hpet_tbl->sequence; 857 858 /* 859 * Some broken BIOSes advertise HPET at 0x0. We really do not 860 * want to allocate a resource there. 861 */ 862 if (!hpet_address) { 863 printk(KERN_WARNING PREFIX 864 "HPET id: %#x base: %#lx is invalid\n", 865 hpet_tbl->id, hpet_address); 866 return 0; 867 } 868 #ifdef CONFIG_X86_64 869 /* 870 * Some even more broken BIOSes advertise HPET at 871 * 0xfed0000000000000 instead of 0xfed00000. Fix it up and add 872 * some noise: 873 */ 874 if (hpet_address == 0xfed0000000000000UL) { 875 if (!hpet_force_user) { 876 printk(KERN_WARNING PREFIX "HPET id: %#x " 877 "base: 0xfed0000000000000 is bogus\n " 878 "try hpet=force on the kernel command line to " 879 "fix it up to 0xfed00000.\n", hpet_tbl->id); 880 hpet_address = 0; 881 return 0; 882 } 883 printk(KERN_WARNING PREFIX 884 "HPET id: %#x base: 0xfed0000000000000 fixed up " 885 "to 0xfed00000.\n", hpet_tbl->id); 886 hpet_address >>= 32; 887 } 888 #endif 889 printk(KERN_INFO PREFIX "HPET id: %#x base: %#lx\n", 890 hpet_tbl->id, hpet_address); 891 892 /* 893 * Allocate and initialize the HPET firmware resource for adding into 894 * the resource tree during the lateinit timeframe. 895 */ 896 #define HPET_RESOURCE_NAME_SIZE 9 897 hpet_res = alloc_bootmem(sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE); 898 899 hpet_res->name = (void *)&hpet_res[1]; 900 hpet_res->flags = IORESOURCE_MEM; 901 snprintf((char *)hpet_res->name, HPET_RESOURCE_NAME_SIZE, "HPET %u", 902 hpet_tbl->sequence); 903 904 hpet_res->start = hpet_address; 905 hpet_res->end = hpet_address + (1 * 1024) - 1; 906 907 return 0; 908 } 909 910 /* 911 * hpet_insert_resource inserts the HPET resources used into the resource 912 * tree. 913 */ 914 static __init int hpet_insert_resource(void) 915 { 916 if (!hpet_res) 917 return 1; 918 919 return insert_resource(&iomem_resource, hpet_res); 920 } 921 922 late_initcall(hpet_insert_resource); 923 924 #else 925 #define acpi_parse_hpet NULL 926 #endif 927 928 static int __init acpi_parse_fadt(struct acpi_table_header *table) 929 { 930 if (!(acpi_gbl_FADT.boot_flags & ACPI_FADT_LEGACY_DEVICES)) { 931 pr_debug("ACPI: no legacy devices present\n"); 932 x86_platform.legacy.devices.pnpbios = 0; 933 } 934 935 if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID && 936 !(acpi_gbl_FADT.boot_flags & ACPI_FADT_8042) && 937 x86_platform.legacy.i8042 != X86_LEGACY_I8042_PLATFORM_ABSENT) { 938 pr_debug("ACPI: i8042 controller is absent\n"); 939 x86_platform.legacy.i8042 = X86_LEGACY_I8042_FIRMWARE_ABSENT; 940 } 941 942 if (acpi_gbl_FADT.boot_flags & ACPI_FADT_NO_CMOS_RTC) { 943 pr_debug("ACPI: not registering RTC platform device\n"); 944 x86_platform.legacy.rtc = 0; 945 } 946 947 #ifdef CONFIG_X86_PM_TIMER 948 /* detect the location of the ACPI PM Timer */ 949 if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID) { 950 /* FADT rev. 2 */ 951 if (acpi_gbl_FADT.xpm_timer_block.space_id != 952 ACPI_ADR_SPACE_SYSTEM_IO) 953 return 0; 954 955 pmtmr_ioport = acpi_gbl_FADT.xpm_timer_block.address; 956 /* 957 * "X" fields are optional extensions to the original V1.0 958 * fields, so we must selectively expand V1.0 fields if the 959 * corresponding X field is zero. 960 */ 961 if (!pmtmr_ioport) 962 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block; 963 } else { 964 /* FADT rev. 1 */ 965 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block; 966 } 967 if (pmtmr_ioport) 968 printk(KERN_INFO PREFIX "PM-Timer IO Port: %#x\n", 969 pmtmr_ioport); 970 #endif 971 return 0; 972 } 973 974 #ifdef CONFIG_X86_LOCAL_APIC 975 /* 976 * Parse LAPIC entries in MADT 977 * returns 0 on success, < 0 on error 978 */ 979 980 static int __init early_acpi_parse_madt_lapic_addr_ovr(void) 981 { 982 int count; 983 984 if (!boot_cpu_has(X86_FEATURE_APIC)) 985 return -ENODEV; 986 987 /* 988 * Note that the LAPIC address is obtained from the MADT (32-bit value) 989 * and (optionally) overridden by a LAPIC_ADDR_OVR entry (64-bit value). 990 */ 991 992 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE, 993 acpi_parse_lapic_addr_ovr, 0); 994 if (count < 0) { 995 printk(KERN_ERR PREFIX 996 "Error parsing LAPIC address override entry\n"); 997 return count; 998 } 999 1000 register_lapic_address(acpi_lapic_addr); 1001 1002 return count; 1003 } 1004 1005 static int __init acpi_parse_madt_lapic_entries(void) 1006 { 1007 int count; 1008 int x2count = 0; 1009 int ret; 1010 struct acpi_subtable_proc madt_proc[2]; 1011 1012 if (!boot_cpu_has(X86_FEATURE_APIC)) 1013 return -ENODEV; 1014 1015 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC, 1016 acpi_parse_sapic, MAX_LOCAL_APIC); 1017 1018 if (!count) { 1019 memset(madt_proc, 0, sizeof(madt_proc)); 1020 madt_proc[0].id = ACPI_MADT_TYPE_LOCAL_APIC; 1021 madt_proc[0].handler = acpi_parse_lapic; 1022 madt_proc[1].id = ACPI_MADT_TYPE_LOCAL_X2APIC; 1023 madt_proc[1].handler = acpi_parse_x2apic; 1024 ret = acpi_table_parse_entries_array(ACPI_SIG_MADT, 1025 sizeof(struct acpi_table_madt), 1026 madt_proc, ARRAY_SIZE(madt_proc), MAX_LOCAL_APIC); 1027 if (ret < 0) { 1028 printk(KERN_ERR PREFIX 1029 "Error parsing LAPIC/X2APIC entries\n"); 1030 return ret; 1031 } 1032 1033 count = madt_proc[0].count; 1034 x2count = madt_proc[1].count; 1035 } 1036 if (!count && !x2count) { 1037 printk(KERN_ERR PREFIX "No LAPIC entries present\n"); 1038 /* TBD: Cleanup to allow fallback to MPS */ 1039 return -ENODEV; 1040 } else if (count < 0 || x2count < 0) { 1041 printk(KERN_ERR PREFIX "Error parsing LAPIC entry\n"); 1042 /* TBD: Cleanup to allow fallback to MPS */ 1043 return count; 1044 } 1045 1046 x2count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC_NMI, 1047 acpi_parse_x2apic_nmi, 0); 1048 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI, 1049 acpi_parse_lapic_nmi, 0); 1050 if (count < 0 || x2count < 0) { 1051 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n"); 1052 /* TBD: Cleanup to allow fallback to MPS */ 1053 return count; 1054 } 1055 return 0; 1056 } 1057 #endif /* CONFIG_X86_LOCAL_APIC */ 1058 1059 #ifdef CONFIG_X86_IO_APIC 1060 static void __init mp_config_acpi_legacy_irqs(void) 1061 { 1062 int i; 1063 struct mpc_intsrc mp_irq; 1064 1065 #ifdef CONFIG_EISA 1066 /* 1067 * Fabricate the legacy ISA bus (bus #31). 1068 */ 1069 mp_bus_id_to_type[MP_ISA_BUS] = MP_BUS_ISA; 1070 #endif 1071 set_bit(MP_ISA_BUS, mp_bus_not_pci); 1072 pr_debug("Bus #%d is ISA\n", MP_ISA_BUS); 1073 1074 /* 1075 * Use the default configuration for the IRQs 0-15. Unless 1076 * overridden by (MADT) interrupt source override entries. 1077 */ 1078 for (i = 0; i < nr_legacy_irqs(); i++) { 1079 int ioapic, pin; 1080 unsigned int dstapic; 1081 int idx; 1082 u32 gsi; 1083 1084 /* Locate the gsi that irq i maps to. */ 1085 if (acpi_isa_irq_to_gsi(i, &gsi)) 1086 continue; 1087 1088 /* 1089 * Locate the IOAPIC that manages the ISA IRQ. 1090 */ 1091 ioapic = mp_find_ioapic(gsi); 1092 if (ioapic < 0) 1093 continue; 1094 pin = mp_find_ioapic_pin(ioapic, gsi); 1095 dstapic = mpc_ioapic_id(ioapic); 1096 1097 for (idx = 0; idx < mp_irq_entries; idx++) { 1098 struct mpc_intsrc *irq = mp_irqs + idx; 1099 1100 /* Do we already have a mapping for this ISA IRQ? */ 1101 if (irq->srcbus == MP_ISA_BUS && irq->srcbusirq == i) 1102 break; 1103 1104 /* Do we already have a mapping for this IOAPIC pin */ 1105 if (irq->dstapic == dstapic && irq->dstirq == pin) 1106 break; 1107 } 1108 1109 if (idx != mp_irq_entries) { 1110 printk(KERN_DEBUG "ACPI: IRQ%d used by override.\n", i); 1111 continue; /* IRQ already used */ 1112 } 1113 1114 mp_irq.type = MP_INTSRC; 1115 mp_irq.irqflag = 0; /* Conforming */ 1116 mp_irq.srcbus = MP_ISA_BUS; 1117 mp_irq.dstapic = dstapic; 1118 mp_irq.irqtype = mp_INT; 1119 mp_irq.srcbusirq = i; /* Identity mapped */ 1120 mp_irq.dstirq = pin; 1121 1122 mp_save_irq(&mp_irq); 1123 } 1124 } 1125 1126 /* 1127 * Parse IOAPIC related entries in MADT 1128 * returns 0 on success, < 0 on error 1129 */ 1130 static int __init acpi_parse_madt_ioapic_entries(void) 1131 { 1132 int count; 1133 1134 /* 1135 * ACPI interpreter is required to complete interrupt setup, 1136 * so if it is off, don't enumerate the io-apics with ACPI. 1137 * If MPS is present, it will handle them, 1138 * otherwise the system will stay in PIC mode 1139 */ 1140 if (acpi_disabled || acpi_noirq) 1141 return -ENODEV; 1142 1143 if (!boot_cpu_has(X86_FEATURE_APIC)) 1144 return -ENODEV; 1145 1146 /* 1147 * if "noapic" boot option, don't look for IO-APICs 1148 */ 1149 if (skip_ioapic_setup) { 1150 printk(KERN_INFO PREFIX "Skipping IOAPIC probe " 1151 "due to 'noapic' option.\n"); 1152 return -ENODEV; 1153 } 1154 1155 count = acpi_table_parse_madt(ACPI_MADT_TYPE_IO_APIC, acpi_parse_ioapic, 1156 MAX_IO_APICS); 1157 if (!count) { 1158 printk(KERN_ERR PREFIX "No IOAPIC entries present\n"); 1159 return -ENODEV; 1160 } else if (count < 0) { 1161 printk(KERN_ERR PREFIX "Error parsing IOAPIC entry\n"); 1162 return count; 1163 } 1164 1165 count = acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE, 1166 acpi_parse_int_src_ovr, nr_irqs); 1167 if (count < 0) { 1168 printk(KERN_ERR PREFIX 1169 "Error parsing interrupt source overrides entry\n"); 1170 /* TBD: Cleanup to allow fallback to MPS */ 1171 return count; 1172 } 1173 1174 /* 1175 * If BIOS did not supply an INT_SRC_OVR for the SCI 1176 * pretend we got one so we can set the SCI flags. 1177 */ 1178 if (!acpi_sci_override_gsi) 1179 acpi_sci_ioapic_setup(acpi_gbl_FADT.sci_interrupt, 0, 0, 1180 acpi_gbl_FADT.sci_interrupt); 1181 1182 /* Fill in identity legacy mappings where no override */ 1183 mp_config_acpi_legacy_irqs(); 1184 1185 count = acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE, 1186 acpi_parse_nmi_src, nr_irqs); 1187 if (count < 0) { 1188 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n"); 1189 /* TBD: Cleanup to allow fallback to MPS */ 1190 return count; 1191 } 1192 1193 return 0; 1194 } 1195 #else 1196 static inline int acpi_parse_madt_ioapic_entries(void) 1197 { 1198 return -1; 1199 } 1200 #endif /* !CONFIG_X86_IO_APIC */ 1201 1202 static void __init early_acpi_process_madt(void) 1203 { 1204 #ifdef CONFIG_X86_LOCAL_APIC 1205 int error; 1206 1207 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) { 1208 1209 /* 1210 * Parse MADT LAPIC entries 1211 */ 1212 error = early_acpi_parse_madt_lapic_addr_ovr(); 1213 if (!error) { 1214 acpi_lapic = 1; 1215 smp_found_config = 1; 1216 } 1217 if (error == -EINVAL) { 1218 /* 1219 * Dell Precision Workstation 410, 610 come here. 1220 */ 1221 printk(KERN_ERR PREFIX 1222 "Invalid BIOS MADT, disabling ACPI\n"); 1223 disable_acpi(); 1224 } 1225 } 1226 #endif 1227 } 1228 1229 static void __init acpi_process_madt(void) 1230 { 1231 #ifdef CONFIG_X86_LOCAL_APIC 1232 int error; 1233 1234 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) { 1235 1236 /* 1237 * Parse MADT LAPIC entries 1238 */ 1239 error = acpi_parse_madt_lapic_entries(); 1240 if (!error) { 1241 acpi_lapic = 1; 1242 1243 /* 1244 * Parse MADT IO-APIC entries 1245 */ 1246 mutex_lock(&acpi_ioapic_lock); 1247 error = acpi_parse_madt_ioapic_entries(); 1248 mutex_unlock(&acpi_ioapic_lock); 1249 if (!error) { 1250 acpi_set_irq_model_ioapic(); 1251 1252 smp_found_config = 1; 1253 } 1254 } 1255 if (error == -EINVAL) { 1256 /* 1257 * Dell Precision Workstation 410, 610 come here. 1258 */ 1259 printk(KERN_ERR PREFIX 1260 "Invalid BIOS MADT, disabling ACPI\n"); 1261 disable_acpi(); 1262 } 1263 } else { 1264 /* 1265 * ACPI found no MADT, and so ACPI wants UP PIC mode. 1266 * In the event an MPS table was found, forget it. 1267 * Boot with "acpi=off" to use MPS on such a system. 1268 */ 1269 if (smp_found_config) { 1270 printk(KERN_WARNING PREFIX 1271 "No APIC-table, disabling MPS\n"); 1272 smp_found_config = 0; 1273 } 1274 } 1275 1276 /* 1277 * ACPI supports both logical (e.g. Hyper-Threading) and physical 1278 * processors, where MPS only supports physical. 1279 */ 1280 if (acpi_lapic && acpi_ioapic) 1281 printk(KERN_INFO "Using ACPI (MADT) for SMP configuration " 1282 "information\n"); 1283 else if (acpi_lapic) 1284 printk(KERN_INFO "Using ACPI for processor (LAPIC) " 1285 "configuration information\n"); 1286 #endif 1287 return; 1288 } 1289 1290 static int __init disable_acpi_irq(const struct dmi_system_id *d) 1291 { 1292 if (!acpi_force) { 1293 printk(KERN_NOTICE "%s detected: force use of acpi=noirq\n", 1294 d->ident); 1295 acpi_noirq_set(); 1296 } 1297 return 0; 1298 } 1299 1300 static int __init disable_acpi_pci(const struct dmi_system_id *d) 1301 { 1302 if (!acpi_force) { 1303 printk(KERN_NOTICE "%s detected: force use of pci=noacpi\n", 1304 d->ident); 1305 acpi_disable_pci(); 1306 } 1307 return 0; 1308 } 1309 1310 static int __init dmi_disable_acpi(const struct dmi_system_id *d) 1311 { 1312 if (!acpi_force) { 1313 printk(KERN_NOTICE "%s detected: acpi off\n", d->ident); 1314 disable_acpi(); 1315 } else { 1316 printk(KERN_NOTICE 1317 "Warning: DMI blacklist says broken, but acpi forced\n"); 1318 } 1319 return 0; 1320 } 1321 1322 /* 1323 * Force ignoring BIOS IRQ0 override 1324 */ 1325 static int __init dmi_ignore_irq0_timer_override(const struct dmi_system_id *d) 1326 { 1327 if (!acpi_skip_timer_override) { 1328 pr_notice("%s detected: Ignoring BIOS IRQ0 override\n", 1329 d->ident); 1330 acpi_skip_timer_override = 1; 1331 } 1332 return 0; 1333 } 1334 1335 /* 1336 * ACPI offers an alternative platform interface model that removes 1337 * ACPI hardware requirements for platforms that do not implement 1338 * the PC Architecture. 1339 * 1340 * We initialize the Hardware-reduced ACPI model here: 1341 */ 1342 static void __init acpi_reduced_hw_init(void) 1343 { 1344 if (acpi_gbl_reduced_hardware) { 1345 /* 1346 * Override x86_init functions and bypass legacy pic 1347 * in Hardware-reduced ACPI mode 1348 */ 1349 x86_init.timers.timer_init = x86_init_noop; 1350 x86_init.irqs.pre_vector_init = x86_init_noop; 1351 legacy_pic = &null_legacy_pic; 1352 } 1353 } 1354 1355 /* 1356 * If your system is blacklisted here, but you find that acpi=force 1357 * works for you, please contact linux-acpi@vger.kernel.org 1358 */ 1359 static struct dmi_system_id __initdata acpi_dmi_table[] = { 1360 /* 1361 * Boxes that need ACPI disabled 1362 */ 1363 { 1364 .callback = dmi_disable_acpi, 1365 .ident = "IBM Thinkpad", 1366 .matches = { 1367 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), 1368 DMI_MATCH(DMI_BOARD_NAME, "2629H1G"), 1369 }, 1370 }, 1371 1372 /* 1373 * Boxes that need ACPI PCI IRQ routing disabled 1374 */ 1375 { 1376 .callback = disable_acpi_irq, 1377 .ident = "ASUS A7V", 1378 .matches = { 1379 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC"), 1380 DMI_MATCH(DMI_BOARD_NAME, "<A7V>"), 1381 /* newer BIOS, Revision 1011, does work */ 1382 DMI_MATCH(DMI_BIOS_VERSION, 1383 "ASUS A7V ACPI BIOS Revision 1007"), 1384 }, 1385 }, 1386 { 1387 /* 1388 * Latest BIOS for IBM 600E (1.16) has bad pcinum 1389 * for LPC bridge, which is needed for the PCI 1390 * interrupt links to work. DSDT fix is in bug 5966. 1391 * 2645, 2646 model numbers are shared with 600/600E/600X 1392 */ 1393 .callback = disable_acpi_irq, 1394 .ident = "IBM Thinkpad 600 Series 2645", 1395 .matches = { 1396 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), 1397 DMI_MATCH(DMI_BOARD_NAME, "2645"), 1398 }, 1399 }, 1400 { 1401 .callback = disable_acpi_irq, 1402 .ident = "IBM Thinkpad 600 Series 2646", 1403 .matches = { 1404 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), 1405 DMI_MATCH(DMI_BOARD_NAME, "2646"), 1406 }, 1407 }, 1408 /* 1409 * Boxes that need ACPI PCI IRQ routing and PCI scan disabled 1410 */ 1411 { /* _BBN 0 bug */ 1412 .callback = disable_acpi_pci, 1413 .ident = "ASUS PR-DLS", 1414 .matches = { 1415 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."), 1416 DMI_MATCH(DMI_BOARD_NAME, "PR-DLS"), 1417 DMI_MATCH(DMI_BIOS_VERSION, 1418 "ASUS PR-DLS ACPI BIOS Revision 1010"), 1419 DMI_MATCH(DMI_BIOS_DATE, "03/21/2003") 1420 }, 1421 }, 1422 { 1423 .callback = disable_acpi_pci, 1424 .ident = "Acer TravelMate 36x Laptop", 1425 .matches = { 1426 DMI_MATCH(DMI_SYS_VENDOR, "Acer"), 1427 DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"), 1428 }, 1429 }, 1430 {} 1431 }; 1432 1433 /* second table for DMI checks that should run after early-quirks */ 1434 static struct dmi_system_id __initdata acpi_dmi_table_late[] = { 1435 /* 1436 * HP laptops which use a DSDT reporting as HP/SB400/10000, 1437 * which includes some code which overrides all temperature 1438 * trip points to 16C if the INTIN2 input of the I/O APIC 1439 * is enabled. This input is incorrectly designated the 1440 * ISA IRQ 0 via an interrupt source override even though 1441 * it is wired to the output of the master 8259A and INTIN0 1442 * is not connected at all. Force ignoring BIOS IRQ0 1443 * override in that cases. 1444 */ 1445 { 1446 .callback = dmi_ignore_irq0_timer_override, 1447 .ident = "HP nx6115 laptop", 1448 .matches = { 1449 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 1450 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6115"), 1451 }, 1452 }, 1453 { 1454 .callback = dmi_ignore_irq0_timer_override, 1455 .ident = "HP NX6125 laptop", 1456 .matches = { 1457 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 1458 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6125"), 1459 }, 1460 }, 1461 { 1462 .callback = dmi_ignore_irq0_timer_override, 1463 .ident = "HP NX6325 laptop", 1464 .matches = { 1465 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 1466 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6325"), 1467 }, 1468 }, 1469 { 1470 .callback = dmi_ignore_irq0_timer_override, 1471 .ident = "HP 6715b laptop", 1472 .matches = { 1473 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 1474 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq 6715b"), 1475 }, 1476 }, 1477 { 1478 .callback = dmi_ignore_irq0_timer_override, 1479 .ident = "FUJITSU SIEMENS", 1480 .matches = { 1481 DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"), 1482 DMI_MATCH(DMI_PRODUCT_NAME, "AMILO PRO V2030"), 1483 }, 1484 }, 1485 {} 1486 }; 1487 1488 /* 1489 * acpi_boot_table_init() and acpi_boot_init() 1490 * called from setup_arch(), always. 1491 * 1. checksums all tables 1492 * 2. enumerates lapics 1493 * 3. enumerates io-apics 1494 * 1495 * acpi_table_init() is separate to allow reading SRAT without 1496 * other side effects. 1497 * 1498 * side effects of acpi_boot_init: 1499 * acpi_lapic = 1 if LAPIC found 1500 * acpi_ioapic = 1 if IOAPIC found 1501 * if (acpi_lapic && acpi_ioapic) smp_found_config = 1; 1502 * if acpi_blacklisted() acpi_disabled = 1; 1503 * acpi_irq_model=... 1504 * ... 1505 */ 1506 1507 void __init acpi_boot_table_init(void) 1508 { 1509 dmi_check_system(acpi_dmi_table); 1510 1511 /* 1512 * If acpi_disabled, bail out 1513 */ 1514 if (acpi_disabled) 1515 return; 1516 1517 /* 1518 * Initialize the ACPI boot-time table parser. 1519 */ 1520 if (acpi_table_init()) { 1521 disable_acpi(); 1522 return; 1523 } 1524 1525 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf); 1526 1527 /* 1528 * blacklist may disable ACPI entirely 1529 */ 1530 if (acpi_blacklisted()) { 1531 if (acpi_force) { 1532 printk(KERN_WARNING PREFIX "acpi=force override\n"); 1533 } else { 1534 printk(KERN_WARNING PREFIX "Disabling ACPI support\n"); 1535 disable_acpi(); 1536 return; 1537 } 1538 } 1539 } 1540 1541 int __init early_acpi_boot_init(void) 1542 { 1543 /* 1544 * If acpi_disabled, bail out 1545 */ 1546 if (acpi_disabled) 1547 return 1; 1548 1549 /* 1550 * Process the Multiple APIC Description Table (MADT), if present 1551 */ 1552 early_acpi_process_madt(); 1553 1554 /* 1555 * Hardware-reduced ACPI mode initialization: 1556 */ 1557 acpi_reduced_hw_init(); 1558 1559 return 0; 1560 } 1561 1562 static int __init acpi_parse_bgrt(struct acpi_table_header *table) 1563 { 1564 efi_bgrt_init(table); 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_add_region(addr, size, E820_ACPI); 1728 update_e820(); 1729 } 1730