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 39 #include <asm/irqdomain.h> 40 #include <asm/pci_x86.h> 41 #include <asm/pgtable.h> 42 #include <asm/io_apic.h> 43 #include <asm/apic.h> 44 #include <asm/io.h> 45 #include <asm/mpspec.h> 46 #include <asm/smp.h> 47 #include <asm/i8259.h> 48 49 #include "sleep.h" /* To include x86_acpi_suspend_lowlevel */ 50 static int __initdata acpi_force = 0; 51 int acpi_disabled; 52 EXPORT_SYMBOL(acpi_disabled); 53 54 #ifdef CONFIG_X86_64 55 # include <asm/proto.h> 56 #endif /* X86 */ 57 58 #define PREFIX "ACPI: " 59 60 int acpi_noirq; /* skip ACPI IRQ initialization */ 61 int acpi_pci_disabled; /* skip ACPI PCI scan and IRQ initialization */ 62 EXPORT_SYMBOL(acpi_pci_disabled); 63 64 int acpi_lapic; 65 int acpi_ioapic; 66 int acpi_strict; 67 int acpi_disable_cmcff; 68 69 u8 acpi_sci_flags __initdata; 70 int acpi_sci_override_gsi __initdata; 71 int acpi_skip_timer_override __initdata; 72 int acpi_use_timer_override __initdata; 73 int acpi_fix_pin2_polarity __initdata; 74 75 #ifdef CONFIG_X86_LOCAL_APIC 76 static u64 acpi_lapic_addr __initdata = APIC_DEFAULT_PHYS_BASE; 77 #endif 78 79 #ifdef CONFIG_X86_IO_APIC 80 /* 81 * Locks related to IOAPIC hotplug 82 * Hotplug side: 83 * ->device_hotplug_lock 84 * ->acpi_ioapic_lock 85 * ->ioapic_lock 86 * Interrupt mapping side: 87 * ->acpi_ioapic_lock 88 * ->ioapic_mutex 89 * ->ioapic_lock 90 */ 91 static DEFINE_MUTEX(acpi_ioapic_lock); 92 #endif 93 94 /* -------------------------------------------------------------------------- 95 Boot-time Configuration 96 -------------------------------------------------------------------------- */ 97 98 /* 99 * The default interrupt routing model is PIC (8259). This gets 100 * overridden if IOAPICs are enumerated (below). 101 */ 102 enum acpi_irq_model_id acpi_irq_model = ACPI_IRQ_MODEL_PIC; 103 104 105 /* 106 * ISA irqs by default are the first 16 gsis but can be 107 * any gsi as specified by an interrupt source override. 108 */ 109 static u32 isa_irq_to_gsi[NR_IRQS_LEGACY] __read_mostly = { 110 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 111 }; 112 113 #define ACPI_INVALID_GSI INT_MIN 114 115 /* 116 * This is just a simple wrapper around early_ioremap(), 117 * with sanity checks for phys == 0 and size == 0. 118 */ 119 char *__init __acpi_map_table(unsigned long phys, unsigned long size) 120 { 121 122 if (!phys || !size) 123 return NULL; 124 125 return early_ioremap(phys, size); 126 } 127 128 void __init __acpi_unmap_table(char *map, unsigned long size) 129 { 130 if (!map || !size) 131 return; 132 133 early_iounmap(map, size); 134 } 135 136 #ifdef CONFIG_X86_LOCAL_APIC 137 static int __init acpi_parse_madt(struct acpi_table_header *table) 138 { 139 struct acpi_table_madt *madt = NULL; 140 141 if (!boot_cpu_has(X86_FEATURE_APIC)) 142 return -EINVAL; 143 144 madt = (struct acpi_table_madt *)table; 145 if (!madt) { 146 printk(KERN_WARNING PREFIX "Unable to map MADT\n"); 147 return -ENODEV; 148 } 149 150 if (madt->address) { 151 acpi_lapic_addr = (u64) madt->address; 152 153 printk(KERN_DEBUG PREFIX "Local APIC address 0x%08x\n", 154 madt->address); 155 } 156 157 default_acpi_madt_oem_check(madt->header.oem_id, 158 madt->header.oem_table_id); 159 160 return 0; 161 } 162 163 /** 164 * acpi_register_lapic - register a local apic and generates a logic cpu number 165 * @id: local apic id to register 166 * @acpiid: ACPI id to register 167 * @enabled: this cpu is enabled or not 168 * 169 * Returns the logic cpu number which maps to the local apic 170 */ 171 static int acpi_register_lapic(int id, u32 acpiid, u8 enabled) 172 { 173 unsigned int ver = 0; 174 int cpu; 175 176 if (id >= MAX_LOCAL_APIC) { 177 printk(KERN_INFO PREFIX "skipped apicid that is too big\n"); 178 return -EINVAL; 179 } 180 181 if (boot_cpu_physical_apicid != -1U) 182 ver = boot_cpu_apic_version; 183 184 cpu = __generic_processor_info(id, ver, enabled); 185 if (cpu >= 0) 186 early_per_cpu(x86_cpu_to_acpiid, cpu) = acpiid; 187 188 return cpu; 189 } 190 191 static int __init 192 acpi_parse_x2apic(struct acpi_subtable_header *header, const unsigned long end) 193 { 194 struct acpi_madt_local_x2apic *processor = NULL; 195 int apic_id; 196 u8 enabled; 197 198 processor = (struct acpi_madt_local_x2apic *)header; 199 200 if (BAD_MADT_ENTRY(processor, end)) 201 return -EINVAL; 202 203 acpi_table_print_madt_entry(header); 204 205 apic_id = processor->local_apic_id; 206 enabled = processor->lapic_flags & ACPI_MADT_ENABLED; 207 #ifdef CONFIG_X86_X2APIC 208 /* 209 * We need to register disabled CPU as well to permit 210 * counting disabled CPUs. This allows us to size 211 * cpus_possible_map more accurately, to permit 212 * to not preallocating memory for all NR_CPUS 213 * when we use CPU hotplug. 214 */ 215 if (!apic->apic_id_valid(apic_id) && enabled) 216 printk(KERN_WARNING PREFIX "x2apic entry ignored\n"); 217 else 218 acpi_register_lapic(apic_id, processor->uid, enabled); 219 #else 220 printk(KERN_WARNING PREFIX "x2apic entry ignored\n"); 221 #endif 222 223 return 0; 224 } 225 226 static int __init 227 acpi_parse_lapic(struct acpi_subtable_header * header, const unsigned long end) 228 { 229 struct acpi_madt_local_apic *processor = NULL; 230 231 processor = (struct acpi_madt_local_apic *)header; 232 233 if (BAD_MADT_ENTRY(processor, end)) 234 return -EINVAL; 235 236 acpi_table_print_madt_entry(header); 237 238 /* Ignore invalid ID */ 239 if (processor->id == 0xff) 240 return 0; 241 242 /* 243 * We need to register disabled CPU as well to permit 244 * counting disabled CPUs. This allows us to size 245 * cpus_possible_map more accurately, to permit 246 * to not preallocating memory for all NR_CPUS 247 * when we use CPU hotplug. 248 */ 249 acpi_register_lapic(processor->id, /* APIC ID */ 250 processor->processor_id, /* ACPI ID */ 251 processor->lapic_flags & ACPI_MADT_ENABLED); 252 253 return 0; 254 } 255 256 static int __init 257 acpi_parse_sapic(struct acpi_subtable_header *header, const unsigned long end) 258 { 259 struct acpi_madt_local_sapic *processor = NULL; 260 261 processor = (struct acpi_madt_local_sapic *)header; 262 263 if (BAD_MADT_ENTRY(processor, end)) 264 return -EINVAL; 265 266 acpi_table_print_madt_entry(header); 267 268 acpi_register_lapic((processor->id << 8) | processor->eid,/* APIC ID */ 269 processor->processor_id, /* ACPI ID */ 270 processor->lapic_flags & ACPI_MADT_ENABLED); 271 272 return 0; 273 } 274 275 static int __init 276 acpi_parse_lapic_addr_ovr(struct acpi_subtable_header * header, 277 const unsigned long end) 278 { 279 struct acpi_madt_local_apic_override *lapic_addr_ovr = NULL; 280 281 lapic_addr_ovr = (struct acpi_madt_local_apic_override *)header; 282 283 if (BAD_MADT_ENTRY(lapic_addr_ovr, end)) 284 return -EINVAL; 285 286 acpi_table_print_madt_entry(header); 287 288 acpi_lapic_addr = lapic_addr_ovr->address; 289 290 return 0; 291 } 292 293 static int __init 294 acpi_parse_x2apic_nmi(struct acpi_subtable_header *header, 295 const unsigned long end) 296 { 297 struct acpi_madt_local_x2apic_nmi *x2apic_nmi = NULL; 298 299 x2apic_nmi = (struct acpi_madt_local_x2apic_nmi *)header; 300 301 if (BAD_MADT_ENTRY(x2apic_nmi, end)) 302 return -EINVAL; 303 304 acpi_table_print_madt_entry(header); 305 306 if (x2apic_nmi->lint != 1) 307 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n"); 308 309 return 0; 310 } 311 312 static int __init 313 acpi_parse_lapic_nmi(struct acpi_subtable_header * header, const unsigned long end) 314 { 315 struct acpi_madt_local_apic_nmi *lapic_nmi = NULL; 316 317 lapic_nmi = (struct acpi_madt_local_apic_nmi *)header; 318 319 if (BAD_MADT_ENTRY(lapic_nmi, end)) 320 return -EINVAL; 321 322 acpi_table_print_madt_entry(header); 323 324 if (lapic_nmi->lint != 1) 325 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n"); 326 327 return 0; 328 } 329 330 #endif /*CONFIG_X86_LOCAL_APIC */ 331 332 #ifdef CONFIG_X86_IO_APIC 333 #define MP_ISA_BUS 0 334 335 static void __init mp_override_legacy_irq(u8 bus_irq, u8 polarity, u8 trigger, 336 u32 gsi) 337 { 338 int ioapic; 339 int pin; 340 struct mpc_intsrc mp_irq; 341 342 /* 343 * Convert 'gsi' to 'ioapic.pin'. 344 */ 345 ioapic = mp_find_ioapic(gsi); 346 if (ioapic < 0) 347 return; 348 pin = mp_find_ioapic_pin(ioapic, gsi); 349 350 /* 351 * TBD: This check is for faulty timer entries, where the override 352 * erroneously sets the trigger to level, resulting in a HUGE 353 * increase of timer interrupts! 354 */ 355 if ((bus_irq == 0) && (trigger == 3)) 356 trigger = 1; 357 358 mp_irq.type = MP_INTSRC; 359 mp_irq.irqtype = mp_INT; 360 mp_irq.irqflag = (trigger << 2) | polarity; 361 mp_irq.srcbus = MP_ISA_BUS; 362 mp_irq.srcbusirq = bus_irq; /* IRQ */ 363 mp_irq.dstapic = mpc_ioapic_id(ioapic); /* APIC ID */ 364 mp_irq.dstirq = pin; /* INTIN# */ 365 366 mp_save_irq(&mp_irq); 367 368 /* 369 * Reset default identity mapping if gsi is also an legacy IRQ, 370 * otherwise there will be more than one entry with the same GSI 371 * and acpi_isa_irq_to_gsi() may give wrong result. 372 */ 373 if (gsi < nr_legacy_irqs() && isa_irq_to_gsi[gsi] == gsi) 374 isa_irq_to_gsi[gsi] = ACPI_INVALID_GSI; 375 isa_irq_to_gsi[bus_irq] = gsi; 376 } 377 378 static int mp_config_acpi_gsi(struct device *dev, u32 gsi, int trigger, 379 int polarity) 380 { 381 #ifdef CONFIG_X86_MPPARSE 382 struct mpc_intsrc mp_irq; 383 struct pci_dev *pdev; 384 unsigned char number; 385 unsigned int devfn; 386 int ioapic; 387 u8 pin; 388 389 if (!acpi_ioapic) 390 return 0; 391 if (!dev || !dev_is_pci(dev)) 392 return 0; 393 394 pdev = to_pci_dev(dev); 395 number = pdev->bus->number; 396 devfn = pdev->devfn; 397 pin = pdev->pin; 398 /* print the entry should happen on mptable identically */ 399 mp_irq.type = MP_INTSRC; 400 mp_irq.irqtype = mp_INT; 401 mp_irq.irqflag = (trigger == ACPI_EDGE_SENSITIVE ? 4 : 0x0c) | 402 (polarity == ACPI_ACTIVE_HIGH ? 1 : 3); 403 mp_irq.srcbus = number; 404 mp_irq.srcbusirq = (((devfn >> 3) & 0x1f) << 2) | ((pin - 1) & 3); 405 ioapic = mp_find_ioapic(gsi); 406 mp_irq.dstapic = mpc_ioapic_id(ioapic); 407 mp_irq.dstirq = mp_find_ioapic_pin(ioapic, gsi); 408 409 mp_save_irq(&mp_irq); 410 #endif 411 return 0; 412 } 413 414 static int __init 415 acpi_parse_ioapic(struct acpi_subtable_header * header, const unsigned long end) 416 { 417 struct acpi_madt_io_apic *ioapic = NULL; 418 struct ioapic_domain_cfg cfg = { 419 .type = IOAPIC_DOMAIN_DYNAMIC, 420 .ops = &mp_ioapic_irqdomain_ops, 421 }; 422 423 ioapic = (struct acpi_madt_io_apic *)header; 424 425 if (BAD_MADT_ENTRY(ioapic, end)) 426 return -EINVAL; 427 428 acpi_table_print_madt_entry(header); 429 430 /* Statically assign IRQ numbers for IOAPICs hosting legacy IRQs */ 431 if (ioapic->global_irq_base < nr_legacy_irqs()) 432 cfg.type = IOAPIC_DOMAIN_LEGACY; 433 434 mp_register_ioapic(ioapic->id, ioapic->address, ioapic->global_irq_base, 435 &cfg); 436 437 return 0; 438 } 439 440 /* 441 * Parse Interrupt Source Override for the ACPI SCI 442 */ 443 static void __init acpi_sci_ioapic_setup(u8 bus_irq, u16 polarity, u16 trigger, u32 gsi) 444 { 445 if (trigger == 0) /* compatible SCI trigger is level */ 446 trigger = 3; 447 448 if (polarity == 0) /* compatible SCI polarity is low */ 449 polarity = 3; 450 451 /* Command-line over-ride via acpi_sci= */ 452 if (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) 453 trigger = (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2; 454 455 if (acpi_sci_flags & ACPI_MADT_POLARITY_MASK) 456 polarity = acpi_sci_flags & ACPI_MADT_POLARITY_MASK; 457 458 mp_override_legacy_irq(bus_irq, polarity, trigger, gsi); 459 acpi_penalize_sci_irq(bus_irq, trigger, polarity); 460 461 /* 462 * stash over-ride to indicate we've been here 463 * and for later update of acpi_gbl_FADT 464 */ 465 acpi_sci_override_gsi = gsi; 466 return; 467 } 468 469 static int __init 470 acpi_parse_int_src_ovr(struct acpi_subtable_header * header, 471 const unsigned long end) 472 { 473 struct acpi_madt_interrupt_override *intsrc = NULL; 474 475 intsrc = (struct acpi_madt_interrupt_override *)header; 476 477 if (BAD_MADT_ENTRY(intsrc, end)) 478 return -EINVAL; 479 480 acpi_table_print_madt_entry(header); 481 482 if (intsrc->source_irq == acpi_gbl_FADT.sci_interrupt) { 483 acpi_sci_ioapic_setup(intsrc->source_irq, 484 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK, 485 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2, 486 intsrc->global_irq); 487 return 0; 488 } 489 490 if (intsrc->source_irq == 0) { 491 if (acpi_skip_timer_override) { 492 printk(PREFIX "BIOS IRQ0 override ignored.\n"); 493 return 0; 494 } 495 496 if ((intsrc->global_irq == 2) && acpi_fix_pin2_polarity 497 && (intsrc->inti_flags & ACPI_MADT_POLARITY_MASK)) { 498 intsrc->inti_flags &= ~ACPI_MADT_POLARITY_MASK; 499 printk(PREFIX "BIOS IRQ0 pin2 override: forcing polarity to high active.\n"); 500 } 501 } 502 503 mp_override_legacy_irq(intsrc->source_irq, 504 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK, 505 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2, 506 intsrc->global_irq); 507 508 return 0; 509 } 510 511 static int __init 512 acpi_parse_nmi_src(struct acpi_subtable_header * header, const unsigned long end) 513 { 514 struct acpi_madt_nmi_source *nmi_src = NULL; 515 516 nmi_src = (struct acpi_madt_nmi_source *)header; 517 518 if (BAD_MADT_ENTRY(nmi_src, end)) 519 return -EINVAL; 520 521 acpi_table_print_madt_entry(header); 522 523 /* TBD: Support nimsrc entries? */ 524 525 return 0; 526 } 527 528 #endif /* CONFIG_X86_IO_APIC */ 529 530 /* 531 * acpi_pic_sci_set_trigger() 532 * 533 * use ELCR to set PIC-mode trigger type for SCI 534 * 535 * If a PIC-mode SCI is not recognized or gives spurious IRQ7's 536 * it may require Edge Trigger -- use "acpi_sci=edge" 537 * 538 * Port 0x4d0-4d1 are ECLR1 and ECLR2, the Edge/Level Control Registers 539 * for the 8259 PIC. bit[n] = 1 means irq[n] is Level, otherwise Edge. 540 * ECLR1 is IRQs 0-7 (IRQ 0, 1, 2 must be 0) 541 * ECLR2 is IRQs 8-15 (IRQ 8, 13 must be 0) 542 */ 543 544 void __init acpi_pic_sci_set_trigger(unsigned int irq, u16 trigger) 545 { 546 unsigned int mask = 1 << irq; 547 unsigned int old, new; 548 549 /* Real old ELCR mask */ 550 old = inb(0x4d0) | (inb(0x4d1) << 8); 551 552 /* 553 * If we use ACPI to set PCI IRQs, then we should clear ELCR 554 * since we will set it correctly as we enable the PCI irq 555 * routing. 556 */ 557 new = acpi_noirq ? old : 0; 558 559 /* 560 * Update SCI information in the ELCR, it isn't in the PCI 561 * routing tables.. 562 */ 563 switch (trigger) { 564 case 1: /* Edge - clear */ 565 new &= ~mask; 566 break; 567 case 3: /* Level - set */ 568 new |= mask; 569 break; 570 } 571 572 if (old == new) 573 return; 574 575 printk(PREFIX "setting ELCR to %04x (from %04x)\n", new, old); 576 outb(new, 0x4d0); 577 outb(new >> 8, 0x4d1); 578 } 579 580 int acpi_gsi_to_irq(u32 gsi, unsigned int *irqp) 581 { 582 int rc, irq, trigger, polarity; 583 584 if (acpi_irq_model == ACPI_IRQ_MODEL_PIC) { 585 *irqp = gsi; 586 return 0; 587 } 588 589 rc = acpi_get_override_irq(gsi, &trigger, &polarity); 590 if (rc == 0) { 591 trigger = trigger ? ACPI_LEVEL_SENSITIVE : ACPI_EDGE_SENSITIVE; 592 polarity = polarity ? ACPI_ACTIVE_LOW : ACPI_ACTIVE_HIGH; 593 irq = acpi_register_gsi(NULL, gsi, trigger, polarity); 594 if (irq >= 0) { 595 *irqp = irq; 596 return 0; 597 } 598 } 599 600 return -1; 601 } 602 EXPORT_SYMBOL_GPL(acpi_gsi_to_irq); 603 604 int acpi_isa_irq_to_gsi(unsigned isa_irq, u32 *gsi) 605 { 606 if (isa_irq < nr_legacy_irqs() && 607 isa_irq_to_gsi[isa_irq] != ACPI_INVALID_GSI) { 608 *gsi = isa_irq_to_gsi[isa_irq]; 609 return 0; 610 } 611 612 return -1; 613 } 614 615 static int acpi_register_gsi_pic(struct device *dev, u32 gsi, 616 int trigger, int polarity) 617 { 618 #ifdef CONFIG_PCI 619 /* 620 * Make sure all (legacy) PCI IRQs are set as level-triggered. 621 */ 622 if (trigger == ACPI_LEVEL_SENSITIVE) 623 elcr_set_level_irq(gsi); 624 #endif 625 626 return gsi; 627 } 628 629 #ifdef CONFIG_X86_LOCAL_APIC 630 static int acpi_register_gsi_ioapic(struct device *dev, u32 gsi, 631 int trigger, int polarity) 632 { 633 int irq = gsi; 634 #ifdef CONFIG_X86_IO_APIC 635 int node; 636 struct irq_alloc_info info; 637 638 node = dev ? dev_to_node(dev) : NUMA_NO_NODE; 639 trigger = trigger == ACPI_EDGE_SENSITIVE ? 0 : 1; 640 polarity = polarity == ACPI_ACTIVE_HIGH ? 0 : 1; 641 ioapic_set_alloc_attr(&info, node, trigger, polarity); 642 643 mutex_lock(&acpi_ioapic_lock); 644 irq = mp_map_gsi_to_irq(gsi, IOAPIC_MAP_ALLOC, &info); 645 /* Don't set up the ACPI SCI because it's already set up */ 646 if (irq >= 0 && enable_update_mptable && 647 acpi_gbl_FADT.sci_interrupt != gsi) 648 mp_config_acpi_gsi(dev, gsi, trigger, polarity); 649 mutex_unlock(&acpi_ioapic_lock); 650 #endif 651 652 return irq; 653 } 654 655 static void acpi_unregister_gsi_ioapic(u32 gsi) 656 { 657 #ifdef CONFIG_X86_IO_APIC 658 int irq; 659 660 mutex_lock(&acpi_ioapic_lock); 661 irq = mp_map_gsi_to_irq(gsi, 0, NULL); 662 if (irq > 0) 663 mp_unmap_irq(irq); 664 mutex_unlock(&acpi_ioapic_lock); 665 #endif 666 } 667 #endif 668 669 int (*__acpi_register_gsi)(struct device *dev, u32 gsi, 670 int trigger, int polarity) = acpi_register_gsi_pic; 671 void (*__acpi_unregister_gsi)(u32 gsi) = NULL; 672 673 #ifdef CONFIG_ACPI_SLEEP 674 int (*acpi_suspend_lowlevel)(void) = x86_acpi_suspend_lowlevel; 675 #else 676 int (*acpi_suspend_lowlevel)(void); 677 #endif 678 679 /* 680 * success: return IRQ number (>=0) 681 * failure: return < 0 682 */ 683 int acpi_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity) 684 { 685 return __acpi_register_gsi(dev, gsi, trigger, polarity); 686 } 687 EXPORT_SYMBOL_GPL(acpi_register_gsi); 688 689 void acpi_unregister_gsi(u32 gsi) 690 { 691 if (__acpi_unregister_gsi) 692 __acpi_unregister_gsi(gsi); 693 } 694 EXPORT_SYMBOL_GPL(acpi_unregister_gsi); 695 696 #ifdef CONFIG_X86_LOCAL_APIC 697 static void __init acpi_set_irq_model_ioapic(void) 698 { 699 acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC; 700 __acpi_register_gsi = acpi_register_gsi_ioapic; 701 __acpi_unregister_gsi = acpi_unregister_gsi_ioapic; 702 acpi_ioapic = 1; 703 } 704 #endif 705 706 /* 707 * ACPI based hotplug support for CPU 708 */ 709 #ifdef CONFIG_ACPI_HOTPLUG_CPU 710 #include <acpi/processor.h> 711 712 int acpi_map_cpu2node(acpi_handle handle, int cpu, int physid) 713 { 714 #ifdef CONFIG_ACPI_NUMA 715 int nid; 716 717 nid = acpi_get_node(handle); 718 if (nid != NUMA_NO_NODE) { 719 set_apicid_to_node(physid, nid); 720 numa_set_node(cpu, nid); 721 } 722 #endif 723 return 0; 724 } 725 726 int acpi_map_cpu(acpi_handle handle, phys_cpuid_t physid, int *pcpu) 727 { 728 int cpu; 729 730 cpu = acpi_register_lapic(physid, U32_MAX, ACPI_MADT_ENABLED); 731 if (cpu < 0) { 732 pr_info(PREFIX "Unable to map lapic to logical cpu number\n"); 733 return cpu; 734 } 735 736 acpi_processor_set_pdc(handle); 737 acpi_map_cpu2node(handle, cpu, physid); 738 739 *pcpu = cpu; 740 return 0; 741 } 742 EXPORT_SYMBOL(acpi_map_cpu); 743 744 int acpi_unmap_cpu(int cpu) 745 { 746 #ifdef CONFIG_ACPI_NUMA 747 set_apicid_to_node(per_cpu(x86_cpu_to_apicid, cpu), NUMA_NO_NODE); 748 #endif 749 750 per_cpu(x86_cpu_to_apicid, cpu) = -1; 751 set_cpu_present(cpu, false); 752 num_processors--; 753 754 return (0); 755 } 756 EXPORT_SYMBOL(acpi_unmap_cpu); 757 #endif /* CONFIG_ACPI_HOTPLUG_CPU */ 758 759 int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base) 760 { 761 int ret = -ENOSYS; 762 #ifdef CONFIG_ACPI_HOTPLUG_IOAPIC 763 int ioapic_id; 764 u64 addr; 765 struct ioapic_domain_cfg cfg = { 766 .type = IOAPIC_DOMAIN_DYNAMIC, 767 .ops = &mp_ioapic_irqdomain_ops, 768 }; 769 770 ioapic_id = acpi_get_ioapic_id(handle, gsi_base, &addr); 771 if (ioapic_id < 0) { 772 unsigned long long uid; 773 acpi_status status; 774 775 status = acpi_evaluate_integer(handle, METHOD_NAME__UID, 776 NULL, &uid); 777 if (ACPI_FAILURE(status)) { 778 acpi_handle_warn(handle, "failed to get IOAPIC ID.\n"); 779 return -EINVAL; 780 } 781 ioapic_id = (int)uid; 782 } 783 784 mutex_lock(&acpi_ioapic_lock); 785 ret = mp_register_ioapic(ioapic_id, phys_addr, gsi_base, &cfg); 786 mutex_unlock(&acpi_ioapic_lock); 787 #endif 788 789 return ret; 790 } 791 EXPORT_SYMBOL(acpi_register_ioapic); 792 793 int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base) 794 { 795 int ret = -ENOSYS; 796 797 #ifdef CONFIG_ACPI_HOTPLUG_IOAPIC 798 mutex_lock(&acpi_ioapic_lock); 799 ret = mp_unregister_ioapic(gsi_base); 800 mutex_unlock(&acpi_ioapic_lock); 801 #endif 802 803 return ret; 804 } 805 EXPORT_SYMBOL(acpi_unregister_ioapic); 806 807 /** 808 * acpi_ioapic_registered - Check whether IOAPIC assoicatied with @gsi_base 809 * has been registered 810 * @handle: ACPI handle of the IOAPIC deivce 811 * @gsi_base: GSI base associated with the IOAPIC 812 * 813 * Assume caller holds some type of lock to serialize acpi_ioapic_registered() 814 * with acpi_register_ioapic()/acpi_unregister_ioapic(). 815 */ 816 int acpi_ioapic_registered(acpi_handle handle, u32 gsi_base) 817 { 818 int ret = 0; 819 820 #ifdef CONFIG_ACPI_HOTPLUG_IOAPIC 821 mutex_lock(&acpi_ioapic_lock); 822 ret = mp_ioapic_registered(gsi_base); 823 mutex_unlock(&acpi_ioapic_lock); 824 #endif 825 826 return ret; 827 } 828 829 static int __init acpi_parse_sbf(struct acpi_table_header *table) 830 { 831 struct acpi_table_boot *sb = (struct acpi_table_boot *)table; 832 833 sbf_port = sb->cmos_index; /* Save CMOS port */ 834 835 return 0; 836 } 837 838 #ifdef CONFIG_HPET_TIMER 839 #include <asm/hpet.h> 840 841 static struct resource *hpet_res __initdata; 842 843 static int __init acpi_parse_hpet(struct acpi_table_header *table) 844 { 845 struct acpi_table_hpet *hpet_tbl = (struct acpi_table_hpet *)table; 846 847 if (hpet_tbl->address.space_id != ACPI_SPACE_MEM) { 848 printk(KERN_WARNING PREFIX "HPET timers must be located in " 849 "memory.\n"); 850 return -1; 851 } 852 853 hpet_address = hpet_tbl->address.address; 854 hpet_blockid = hpet_tbl->sequence; 855 856 /* 857 * Some broken BIOSes advertise HPET at 0x0. We really do not 858 * want to allocate a resource there. 859 */ 860 if (!hpet_address) { 861 printk(KERN_WARNING PREFIX 862 "HPET id: %#x base: %#lx is invalid\n", 863 hpet_tbl->id, hpet_address); 864 return 0; 865 } 866 #ifdef CONFIG_X86_64 867 /* 868 * Some even more broken BIOSes advertise HPET at 869 * 0xfed0000000000000 instead of 0xfed00000. Fix it up and add 870 * some noise: 871 */ 872 if (hpet_address == 0xfed0000000000000UL) { 873 if (!hpet_force_user) { 874 printk(KERN_WARNING PREFIX "HPET id: %#x " 875 "base: 0xfed0000000000000 is bogus\n " 876 "try hpet=force on the kernel command line to " 877 "fix it up to 0xfed00000.\n", hpet_tbl->id); 878 hpet_address = 0; 879 return 0; 880 } 881 printk(KERN_WARNING PREFIX 882 "HPET id: %#x base: 0xfed0000000000000 fixed up " 883 "to 0xfed00000.\n", hpet_tbl->id); 884 hpet_address >>= 32; 885 } 886 #endif 887 printk(KERN_INFO PREFIX "HPET id: %#x base: %#lx\n", 888 hpet_tbl->id, hpet_address); 889 890 /* 891 * Allocate and initialize the HPET firmware resource for adding into 892 * the resource tree during the lateinit timeframe. 893 */ 894 #define HPET_RESOURCE_NAME_SIZE 9 895 hpet_res = alloc_bootmem(sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE); 896 897 hpet_res->name = (void *)&hpet_res[1]; 898 hpet_res->flags = IORESOURCE_MEM; 899 snprintf((char *)hpet_res->name, HPET_RESOURCE_NAME_SIZE, "HPET %u", 900 hpet_tbl->sequence); 901 902 hpet_res->start = hpet_address; 903 hpet_res->end = hpet_address + (1 * 1024) - 1; 904 905 return 0; 906 } 907 908 /* 909 * hpet_insert_resource inserts the HPET resources used into the resource 910 * tree. 911 */ 912 static __init int hpet_insert_resource(void) 913 { 914 if (!hpet_res) 915 return 1; 916 917 return insert_resource(&iomem_resource, hpet_res); 918 } 919 920 late_initcall(hpet_insert_resource); 921 922 #else 923 #define acpi_parse_hpet NULL 924 #endif 925 926 static int __init acpi_parse_fadt(struct acpi_table_header *table) 927 { 928 if (!(acpi_gbl_FADT.boot_flags & ACPI_FADT_LEGACY_DEVICES)) { 929 pr_debug("ACPI: no legacy devices present\n"); 930 x86_platform.legacy.devices.pnpbios = 0; 931 } 932 933 if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID && 934 !(acpi_gbl_FADT.boot_flags & ACPI_FADT_8042) && 935 x86_platform.legacy.i8042 != X86_LEGACY_I8042_PLATFORM_ABSENT) { 936 pr_debug("ACPI: i8042 controller is absent\n"); 937 x86_platform.legacy.i8042 = X86_LEGACY_I8042_FIRMWARE_ABSENT; 938 } 939 940 if (acpi_gbl_FADT.boot_flags & ACPI_FADT_NO_CMOS_RTC) { 941 pr_debug("ACPI: not registering RTC platform device\n"); 942 x86_platform.legacy.rtc = 0; 943 } 944 945 #ifdef CONFIG_X86_PM_TIMER 946 /* detect the location of the ACPI PM Timer */ 947 if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID) { 948 /* FADT rev. 2 */ 949 if (acpi_gbl_FADT.xpm_timer_block.space_id != 950 ACPI_ADR_SPACE_SYSTEM_IO) 951 return 0; 952 953 pmtmr_ioport = acpi_gbl_FADT.xpm_timer_block.address; 954 /* 955 * "X" fields are optional extensions to the original V1.0 956 * fields, so we must selectively expand V1.0 fields if the 957 * corresponding X field is zero. 958 */ 959 if (!pmtmr_ioport) 960 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block; 961 } else { 962 /* FADT rev. 1 */ 963 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block; 964 } 965 if (pmtmr_ioport) 966 printk(KERN_INFO PREFIX "PM-Timer IO Port: %#x\n", 967 pmtmr_ioport); 968 #endif 969 return 0; 970 } 971 972 #ifdef CONFIG_X86_LOCAL_APIC 973 /* 974 * Parse LAPIC entries in MADT 975 * returns 0 on success, < 0 on error 976 */ 977 978 static int __init early_acpi_parse_madt_lapic_addr_ovr(void) 979 { 980 int count; 981 982 if (!boot_cpu_has(X86_FEATURE_APIC)) 983 return -ENODEV; 984 985 /* 986 * Note that the LAPIC address is obtained from the MADT (32-bit value) 987 * and (optionally) overridden by a LAPIC_ADDR_OVR entry (64-bit value). 988 */ 989 990 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE, 991 acpi_parse_lapic_addr_ovr, 0); 992 if (count < 0) { 993 printk(KERN_ERR PREFIX 994 "Error parsing LAPIC address override entry\n"); 995 return count; 996 } 997 998 register_lapic_address(acpi_lapic_addr); 999 1000 return count; 1001 } 1002 1003 static int __init acpi_parse_madt_lapic_entries(void) 1004 { 1005 int count; 1006 int x2count = 0; 1007 int ret; 1008 struct acpi_subtable_proc madt_proc[2]; 1009 1010 if (!boot_cpu_has(X86_FEATURE_APIC)) 1011 return -ENODEV; 1012 1013 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC, 1014 acpi_parse_sapic, MAX_LOCAL_APIC); 1015 1016 if (!count) { 1017 memset(madt_proc, 0, sizeof(madt_proc)); 1018 madt_proc[0].id = ACPI_MADT_TYPE_LOCAL_APIC; 1019 madt_proc[0].handler = acpi_parse_lapic; 1020 madt_proc[1].id = ACPI_MADT_TYPE_LOCAL_X2APIC; 1021 madt_proc[1].handler = acpi_parse_x2apic; 1022 ret = acpi_table_parse_entries_array(ACPI_SIG_MADT, 1023 sizeof(struct acpi_table_madt), 1024 madt_proc, ARRAY_SIZE(madt_proc), MAX_LOCAL_APIC); 1025 if (ret < 0) { 1026 printk(KERN_ERR PREFIX 1027 "Error parsing LAPIC/X2APIC entries\n"); 1028 return ret; 1029 } 1030 1031 count = madt_proc[0].count; 1032 x2count = madt_proc[1].count; 1033 } 1034 if (!count && !x2count) { 1035 printk(KERN_ERR PREFIX "No LAPIC entries present\n"); 1036 /* TBD: Cleanup to allow fallback to MPS */ 1037 return -ENODEV; 1038 } else if (count < 0 || x2count < 0) { 1039 printk(KERN_ERR PREFIX "Error parsing LAPIC entry\n"); 1040 /* TBD: Cleanup to allow fallback to MPS */ 1041 return count; 1042 } 1043 1044 x2count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC_NMI, 1045 acpi_parse_x2apic_nmi, 0); 1046 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI, 1047 acpi_parse_lapic_nmi, 0); 1048 if (count < 0 || x2count < 0) { 1049 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n"); 1050 /* TBD: Cleanup to allow fallback to MPS */ 1051 return count; 1052 } 1053 return 0; 1054 } 1055 #endif /* CONFIG_X86_LOCAL_APIC */ 1056 1057 #ifdef CONFIG_X86_IO_APIC 1058 static void __init mp_config_acpi_legacy_irqs(void) 1059 { 1060 int i; 1061 struct mpc_intsrc mp_irq; 1062 1063 #ifdef CONFIG_EISA 1064 /* 1065 * Fabricate the legacy ISA bus (bus #31). 1066 */ 1067 mp_bus_id_to_type[MP_ISA_BUS] = MP_BUS_ISA; 1068 #endif 1069 set_bit(MP_ISA_BUS, mp_bus_not_pci); 1070 pr_debug("Bus #%d is ISA\n", MP_ISA_BUS); 1071 1072 /* 1073 * Use the default configuration for the IRQs 0-15. Unless 1074 * overridden by (MADT) interrupt source override entries. 1075 */ 1076 for (i = 0; i < nr_legacy_irqs(); i++) { 1077 int ioapic, pin; 1078 unsigned int dstapic; 1079 int idx; 1080 u32 gsi; 1081 1082 /* Locate the gsi that irq i maps to. */ 1083 if (acpi_isa_irq_to_gsi(i, &gsi)) 1084 continue; 1085 1086 /* 1087 * Locate the IOAPIC that manages the ISA IRQ. 1088 */ 1089 ioapic = mp_find_ioapic(gsi); 1090 if (ioapic < 0) 1091 continue; 1092 pin = mp_find_ioapic_pin(ioapic, gsi); 1093 dstapic = mpc_ioapic_id(ioapic); 1094 1095 for (idx = 0; idx < mp_irq_entries; idx++) { 1096 struct mpc_intsrc *irq = mp_irqs + idx; 1097 1098 /* Do we already have a mapping for this ISA IRQ? */ 1099 if (irq->srcbus == MP_ISA_BUS && irq->srcbusirq == i) 1100 break; 1101 1102 /* Do we already have a mapping for this IOAPIC pin */ 1103 if (irq->dstapic == dstapic && irq->dstirq == pin) 1104 break; 1105 } 1106 1107 if (idx != mp_irq_entries) { 1108 printk(KERN_DEBUG "ACPI: IRQ%d used by override.\n", i); 1109 continue; /* IRQ already used */ 1110 } 1111 1112 mp_irq.type = MP_INTSRC; 1113 mp_irq.irqflag = 0; /* Conforming */ 1114 mp_irq.srcbus = MP_ISA_BUS; 1115 mp_irq.dstapic = dstapic; 1116 mp_irq.irqtype = mp_INT; 1117 mp_irq.srcbusirq = i; /* Identity mapped */ 1118 mp_irq.dstirq = pin; 1119 1120 mp_save_irq(&mp_irq); 1121 } 1122 } 1123 1124 /* 1125 * Parse IOAPIC related entries in MADT 1126 * returns 0 on success, < 0 on error 1127 */ 1128 static int __init acpi_parse_madt_ioapic_entries(void) 1129 { 1130 int count; 1131 1132 /* 1133 * ACPI interpreter is required to complete interrupt setup, 1134 * so if it is off, don't enumerate the io-apics with ACPI. 1135 * If MPS is present, it will handle them, 1136 * otherwise the system will stay in PIC mode 1137 */ 1138 if (acpi_disabled || acpi_noirq) 1139 return -ENODEV; 1140 1141 if (!boot_cpu_has(X86_FEATURE_APIC)) 1142 return -ENODEV; 1143 1144 /* 1145 * if "noapic" boot option, don't look for IO-APICs 1146 */ 1147 if (skip_ioapic_setup) { 1148 printk(KERN_INFO PREFIX "Skipping IOAPIC probe " 1149 "due to 'noapic' option.\n"); 1150 return -ENODEV; 1151 } 1152 1153 count = acpi_table_parse_madt(ACPI_MADT_TYPE_IO_APIC, acpi_parse_ioapic, 1154 MAX_IO_APICS); 1155 if (!count) { 1156 printk(KERN_ERR PREFIX "No IOAPIC entries present\n"); 1157 return -ENODEV; 1158 } else if (count < 0) { 1159 printk(KERN_ERR PREFIX "Error parsing IOAPIC entry\n"); 1160 return count; 1161 } 1162 1163 count = acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE, 1164 acpi_parse_int_src_ovr, nr_irqs); 1165 if (count < 0) { 1166 printk(KERN_ERR PREFIX 1167 "Error parsing interrupt source overrides entry\n"); 1168 /* TBD: Cleanup to allow fallback to MPS */ 1169 return count; 1170 } 1171 1172 /* 1173 * If BIOS did not supply an INT_SRC_OVR for the SCI 1174 * pretend we got one so we can set the SCI flags. 1175 */ 1176 if (!acpi_sci_override_gsi) 1177 acpi_sci_ioapic_setup(acpi_gbl_FADT.sci_interrupt, 0, 0, 1178 acpi_gbl_FADT.sci_interrupt); 1179 1180 /* Fill in identity legacy mappings where no override */ 1181 mp_config_acpi_legacy_irqs(); 1182 1183 count = acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE, 1184 acpi_parse_nmi_src, nr_irqs); 1185 if (count < 0) { 1186 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n"); 1187 /* TBD: Cleanup to allow fallback to MPS */ 1188 return count; 1189 } 1190 1191 return 0; 1192 } 1193 #else 1194 static inline int acpi_parse_madt_ioapic_entries(void) 1195 { 1196 return -1; 1197 } 1198 #endif /* !CONFIG_X86_IO_APIC */ 1199 1200 static void __init early_acpi_process_madt(void) 1201 { 1202 #ifdef CONFIG_X86_LOCAL_APIC 1203 int error; 1204 1205 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) { 1206 1207 /* 1208 * Parse MADT LAPIC entries 1209 */ 1210 error = early_acpi_parse_madt_lapic_addr_ovr(); 1211 if (!error) { 1212 acpi_lapic = 1; 1213 smp_found_config = 1; 1214 } 1215 if (error == -EINVAL) { 1216 /* 1217 * Dell Precision Workstation 410, 610 come here. 1218 */ 1219 printk(KERN_ERR PREFIX 1220 "Invalid BIOS MADT, disabling ACPI\n"); 1221 disable_acpi(); 1222 } 1223 } 1224 #endif 1225 } 1226 1227 static void __init acpi_process_madt(void) 1228 { 1229 #ifdef CONFIG_X86_LOCAL_APIC 1230 int error; 1231 1232 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) { 1233 1234 /* 1235 * Parse MADT LAPIC entries 1236 */ 1237 error = acpi_parse_madt_lapic_entries(); 1238 if (!error) { 1239 acpi_lapic = 1; 1240 1241 /* 1242 * Parse MADT IO-APIC entries 1243 */ 1244 mutex_lock(&acpi_ioapic_lock); 1245 error = acpi_parse_madt_ioapic_entries(); 1246 mutex_unlock(&acpi_ioapic_lock); 1247 if (!error) { 1248 acpi_set_irq_model_ioapic(); 1249 1250 smp_found_config = 1; 1251 } 1252 } 1253 if (error == -EINVAL) { 1254 /* 1255 * Dell Precision Workstation 410, 610 come here. 1256 */ 1257 printk(KERN_ERR PREFIX 1258 "Invalid BIOS MADT, disabling ACPI\n"); 1259 disable_acpi(); 1260 } 1261 } else { 1262 /* 1263 * ACPI found no MADT, and so ACPI wants UP PIC mode. 1264 * In the event an MPS table was found, forget it. 1265 * Boot with "acpi=off" to use MPS on such a system. 1266 */ 1267 if (smp_found_config) { 1268 printk(KERN_WARNING PREFIX 1269 "No APIC-table, disabling MPS\n"); 1270 smp_found_config = 0; 1271 } 1272 } 1273 1274 /* 1275 * ACPI supports both logical (e.g. Hyper-Threading) and physical 1276 * processors, where MPS only supports physical. 1277 */ 1278 if (acpi_lapic && acpi_ioapic) 1279 printk(KERN_INFO "Using ACPI (MADT) for SMP configuration " 1280 "information\n"); 1281 else if (acpi_lapic) 1282 printk(KERN_INFO "Using ACPI for processor (LAPIC) " 1283 "configuration information\n"); 1284 #endif 1285 return; 1286 } 1287 1288 static int __init disable_acpi_irq(const struct dmi_system_id *d) 1289 { 1290 if (!acpi_force) { 1291 printk(KERN_NOTICE "%s detected: force use of acpi=noirq\n", 1292 d->ident); 1293 acpi_noirq_set(); 1294 } 1295 return 0; 1296 } 1297 1298 static int __init disable_acpi_pci(const struct dmi_system_id *d) 1299 { 1300 if (!acpi_force) { 1301 printk(KERN_NOTICE "%s detected: force use of pci=noacpi\n", 1302 d->ident); 1303 acpi_disable_pci(); 1304 } 1305 return 0; 1306 } 1307 1308 static int __init dmi_disable_acpi(const struct dmi_system_id *d) 1309 { 1310 if (!acpi_force) { 1311 printk(KERN_NOTICE "%s detected: acpi off\n", d->ident); 1312 disable_acpi(); 1313 } else { 1314 printk(KERN_NOTICE 1315 "Warning: DMI blacklist says broken, but acpi forced\n"); 1316 } 1317 return 0; 1318 } 1319 1320 /* 1321 * Force ignoring BIOS IRQ0 override 1322 */ 1323 static int __init dmi_ignore_irq0_timer_override(const struct dmi_system_id *d) 1324 { 1325 if (!acpi_skip_timer_override) { 1326 pr_notice("%s detected: Ignoring BIOS IRQ0 override\n", 1327 d->ident); 1328 acpi_skip_timer_override = 1; 1329 } 1330 return 0; 1331 } 1332 1333 /* 1334 * ACPI offers an alternative platform interface model that removes 1335 * ACPI hardware requirements for platforms that do not implement 1336 * the PC Architecture. 1337 * 1338 * We initialize the Hardware-reduced ACPI model here: 1339 */ 1340 static void __init acpi_reduced_hw_init(void) 1341 { 1342 if (acpi_gbl_reduced_hardware) { 1343 /* 1344 * Override x86_init functions and bypass legacy pic 1345 * in Hardware-reduced ACPI mode 1346 */ 1347 x86_init.timers.timer_init = x86_init_noop; 1348 x86_init.irqs.pre_vector_init = x86_init_noop; 1349 legacy_pic = &null_legacy_pic; 1350 } 1351 } 1352 1353 /* 1354 * If your system is blacklisted here, but you find that acpi=force 1355 * works for you, please contact linux-acpi@vger.kernel.org 1356 */ 1357 static struct dmi_system_id __initdata acpi_dmi_table[] = { 1358 /* 1359 * Boxes that need ACPI disabled 1360 */ 1361 { 1362 .callback = dmi_disable_acpi, 1363 .ident = "IBM Thinkpad", 1364 .matches = { 1365 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), 1366 DMI_MATCH(DMI_BOARD_NAME, "2629H1G"), 1367 }, 1368 }, 1369 1370 /* 1371 * Boxes that need ACPI PCI IRQ routing disabled 1372 */ 1373 { 1374 .callback = disable_acpi_irq, 1375 .ident = "ASUS A7V", 1376 .matches = { 1377 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC"), 1378 DMI_MATCH(DMI_BOARD_NAME, "<A7V>"), 1379 /* newer BIOS, Revision 1011, does work */ 1380 DMI_MATCH(DMI_BIOS_VERSION, 1381 "ASUS A7V ACPI BIOS Revision 1007"), 1382 }, 1383 }, 1384 { 1385 /* 1386 * Latest BIOS for IBM 600E (1.16) has bad pcinum 1387 * for LPC bridge, which is needed for the PCI 1388 * interrupt links to work. DSDT fix is in bug 5966. 1389 * 2645, 2646 model numbers are shared with 600/600E/600X 1390 */ 1391 .callback = disable_acpi_irq, 1392 .ident = "IBM Thinkpad 600 Series 2645", 1393 .matches = { 1394 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), 1395 DMI_MATCH(DMI_BOARD_NAME, "2645"), 1396 }, 1397 }, 1398 { 1399 .callback = disable_acpi_irq, 1400 .ident = "IBM Thinkpad 600 Series 2646", 1401 .matches = { 1402 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), 1403 DMI_MATCH(DMI_BOARD_NAME, "2646"), 1404 }, 1405 }, 1406 /* 1407 * Boxes that need ACPI PCI IRQ routing and PCI scan disabled 1408 */ 1409 { /* _BBN 0 bug */ 1410 .callback = disable_acpi_pci, 1411 .ident = "ASUS PR-DLS", 1412 .matches = { 1413 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."), 1414 DMI_MATCH(DMI_BOARD_NAME, "PR-DLS"), 1415 DMI_MATCH(DMI_BIOS_VERSION, 1416 "ASUS PR-DLS ACPI BIOS Revision 1010"), 1417 DMI_MATCH(DMI_BIOS_DATE, "03/21/2003") 1418 }, 1419 }, 1420 { 1421 .callback = disable_acpi_pci, 1422 .ident = "Acer TravelMate 36x Laptop", 1423 .matches = { 1424 DMI_MATCH(DMI_SYS_VENDOR, "Acer"), 1425 DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"), 1426 }, 1427 }, 1428 {} 1429 }; 1430 1431 /* second table for DMI checks that should run after early-quirks */ 1432 static struct dmi_system_id __initdata acpi_dmi_table_late[] = { 1433 /* 1434 * HP laptops which use a DSDT reporting as HP/SB400/10000, 1435 * which includes some code which overrides all temperature 1436 * trip points to 16C if the INTIN2 input of the I/O APIC 1437 * is enabled. This input is incorrectly designated the 1438 * ISA IRQ 0 via an interrupt source override even though 1439 * it is wired to the output of the master 8259A and INTIN0 1440 * is not connected at all. Force ignoring BIOS IRQ0 1441 * override in that cases. 1442 */ 1443 { 1444 .callback = dmi_ignore_irq0_timer_override, 1445 .ident = "HP nx6115 laptop", 1446 .matches = { 1447 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 1448 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6115"), 1449 }, 1450 }, 1451 { 1452 .callback = dmi_ignore_irq0_timer_override, 1453 .ident = "HP NX6125 laptop", 1454 .matches = { 1455 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 1456 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6125"), 1457 }, 1458 }, 1459 { 1460 .callback = dmi_ignore_irq0_timer_override, 1461 .ident = "HP NX6325 laptop", 1462 .matches = { 1463 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 1464 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6325"), 1465 }, 1466 }, 1467 { 1468 .callback = dmi_ignore_irq0_timer_override, 1469 .ident = "HP 6715b laptop", 1470 .matches = { 1471 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 1472 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq 6715b"), 1473 }, 1474 }, 1475 { 1476 .callback = dmi_ignore_irq0_timer_override, 1477 .ident = "FUJITSU SIEMENS", 1478 .matches = { 1479 DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"), 1480 DMI_MATCH(DMI_PRODUCT_NAME, "AMILO PRO V2030"), 1481 }, 1482 }, 1483 {} 1484 }; 1485 1486 /* 1487 * acpi_boot_table_init() and acpi_boot_init() 1488 * called from setup_arch(), always. 1489 * 1. checksums all tables 1490 * 2. enumerates lapics 1491 * 3. enumerates io-apics 1492 * 1493 * acpi_table_init() is separate to allow reading SRAT without 1494 * other side effects. 1495 * 1496 * side effects of acpi_boot_init: 1497 * acpi_lapic = 1 if LAPIC found 1498 * acpi_ioapic = 1 if IOAPIC found 1499 * if (acpi_lapic && acpi_ioapic) smp_found_config = 1; 1500 * if acpi_blacklisted() acpi_disabled = 1; 1501 * acpi_irq_model=... 1502 * ... 1503 */ 1504 1505 void __init acpi_boot_table_init(void) 1506 { 1507 dmi_check_system(acpi_dmi_table); 1508 1509 /* 1510 * If acpi_disabled, bail out 1511 */ 1512 if (acpi_disabled) 1513 return; 1514 1515 /* 1516 * Initialize the ACPI boot-time table parser. 1517 */ 1518 if (acpi_table_init()) { 1519 disable_acpi(); 1520 return; 1521 } 1522 1523 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf); 1524 1525 /* 1526 * blacklist may disable ACPI entirely 1527 */ 1528 if (acpi_blacklisted()) { 1529 if (acpi_force) { 1530 printk(KERN_WARNING PREFIX "acpi=force override\n"); 1531 } else { 1532 printk(KERN_WARNING PREFIX "Disabling ACPI support\n"); 1533 disable_acpi(); 1534 return; 1535 } 1536 } 1537 } 1538 1539 int __init early_acpi_boot_init(void) 1540 { 1541 /* 1542 * If acpi_disabled, bail out 1543 */ 1544 if (acpi_disabled) 1545 return 1; 1546 1547 /* 1548 * Process the Multiple APIC Description Table (MADT), if present 1549 */ 1550 early_acpi_process_madt(); 1551 1552 /* 1553 * Hardware-reduced ACPI mode initialization: 1554 */ 1555 acpi_reduced_hw_init(); 1556 1557 return 0; 1558 } 1559 1560 int __init acpi_boot_init(void) 1561 { 1562 /* those are executed after early-quirks are executed */ 1563 dmi_check_system(acpi_dmi_table_late); 1564 1565 /* 1566 * If acpi_disabled, bail out 1567 */ 1568 if (acpi_disabled) 1569 return 1; 1570 1571 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf); 1572 1573 /* 1574 * set sci_int and PM timer address 1575 */ 1576 acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt); 1577 1578 /* 1579 * Process the Multiple APIC Description Table (MADT), if present 1580 */ 1581 acpi_process_madt(); 1582 1583 acpi_table_parse(ACPI_SIG_HPET, acpi_parse_hpet); 1584 1585 if (!acpi_noirq) 1586 x86_init.pci.init = pci_acpi_init; 1587 1588 return 0; 1589 } 1590 1591 static int __init parse_acpi(char *arg) 1592 { 1593 if (!arg) 1594 return -EINVAL; 1595 1596 /* "acpi=off" disables both ACPI table parsing and interpreter */ 1597 if (strcmp(arg, "off") == 0) { 1598 disable_acpi(); 1599 } 1600 /* acpi=force to over-ride black-list */ 1601 else if (strcmp(arg, "force") == 0) { 1602 acpi_force = 1; 1603 acpi_disabled = 0; 1604 } 1605 /* acpi=strict disables out-of-spec workarounds */ 1606 else if (strcmp(arg, "strict") == 0) { 1607 acpi_strict = 1; 1608 } 1609 /* acpi=rsdt use RSDT instead of XSDT */ 1610 else if (strcmp(arg, "rsdt") == 0) { 1611 acpi_gbl_do_not_use_xsdt = TRUE; 1612 } 1613 /* "acpi=noirq" disables ACPI interrupt routing */ 1614 else if (strcmp(arg, "noirq") == 0) { 1615 acpi_noirq_set(); 1616 } 1617 /* "acpi=copy_dsdt" copys DSDT */ 1618 else if (strcmp(arg, "copy_dsdt") == 0) { 1619 acpi_gbl_copy_dsdt_locally = 1; 1620 } 1621 /* "acpi=nocmcff" disables FF mode for corrected errors */ 1622 else if (strcmp(arg, "nocmcff") == 0) { 1623 acpi_disable_cmcff = 1; 1624 } else { 1625 /* Core will printk when we return error. */ 1626 return -EINVAL; 1627 } 1628 return 0; 1629 } 1630 early_param("acpi", parse_acpi); 1631 1632 /* FIXME: Using pci= for an ACPI parameter is a travesty. */ 1633 static int __init parse_pci(char *arg) 1634 { 1635 if (arg && strcmp(arg, "noacpi") == 0) 1636 acpi_disable_pci(); 1637 return 0; 1638 } 1639 early_param("pci", parse_pci); 1640 1641 int __init acpi_mps_check(void) 1642 { 1643 #if defined(CONFIG_X86_LOCAL_APIC) && !defined(CONFIG_X86_MPPARSE) 1644 /* mptable code is not built-in*/ 1645 if (acpi_disabled || acpi_noirq) { 1646 printk(KERN_WARNING "MPS support code is not built-in.\n" 1647 "Using acpi=off or acpi=noirq or pci=noacpi " 1648 "may have problem\n"); 1649 return 1; 1650 } 1651 #endif 1652 return 0; 1653 } 1654 1655 #ifdef CONFIG_X86_IO_APIC 1656 static int __init parse_acpi_skip_timer_override(char *arg) 1657 { 1658 acpi_skip_timer_override = 1; 1659 return 0; 1660 } 1661 early_param("acpi_skip_timer_override", parse_acpi_skip_timer_override); 1662 1663 static int __init parse_acpi_use_timer_override(char *arg) 1664 { 1665 acpi_use_timer_override = 1; 1666 return 0; 1667 } 1668 early_param("acpi_use_timer_override", parse_acpi_use_timer_override); 1669 #endif /* CONFIG_X86_IO_APIC */ 1670 1671 static int __init setup_acpi_sci(char *s) 1672 { 1673 if (!s) 1674 return -EINVAL; 1675 if (!strcmp(s, "edge")) 1676 acpi_sci_flags = ACPI_MADT_TRIGGER_EDGE | 1677 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK); 1678 else if (!strcmp(s, "level")) 1679 acpi_sci_flags = ACPI_MADT_TRIGGER_LEVEL | 1680 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK); 1681 else if (!strcmp(s, "high")) 1682 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_HIGH | 1683 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK); 1684 else if (!strcmp(s, "low")) 1685 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_LOW | 1686 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK); 1687 else 1688 return -EINVAL; 1689 return 0; 1690 } 1691 early_param("acpi_sci", setup_acpi_sci); 1692 1693 int __acpi_acquire_global_lock(unsigned int *lock) 1694 { 1695 unsigned int old, new, val; 1696 do { 1697 old = *lock; 1698 new = (((old & ~0x3) + 2) + ((old >> 1) & 0x1)); 1699 val = cmpxchg(lock, old, new); 1700 } while (unlikely (val != old)); 1701 return (new < 3) ? -1 : 0; 1702 } 1703 1704 int __acpi_release_global_lock(unsigned int *lock) 1705 { 1706 unsigned int old, new, val; 1707 do { 1708 old = *lock; 1709 new = old & ~0x3; 1710 val = cmpxchg(lock, old, new); 1711 } while (unlikely (val != old)); 1712 return old & 0x1; 1713 } 1714 1715 void __init arch_reserve_mem_area(acpi_physical_address addr, size_t size) 1716 { 1717 e820_add_region(addr, size, E820_ACPI); 1718 update_e820(); 1719 } 1720