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 #include <linux/serial_core.h> 40 41 #include <asm/e820/api.h> 42 #include <asm/irqdomain.h> 43 #include <asm/pci_x86.h> 44 #include <asm/pgtable.h> 45 #include <asm/io_apic.h> 46 #include <asm/apic.h> 47 #include <asm/io.h> 48 #include <asm/mpspec.h> 49 #include <asm/smp.h> 50 #include <asm/i8259.h> 51 52 #include "sleep.h" /* To include x86_acpi_suspend_lowlevel */ 53 static int __initdata acpi_force = 0; 54 int acpi_disabled; 55 EXPORT_SYMBOL(acpi_disabled); 56 57 #ifdef CONFIG_X86_64 58 # include <asm/proto.h> 59 #endif /* X86 */ 60 61 #define PREFIX "ACPI: " 62 63 int acpi_noirq; /* skip ACPI IRQ initialization */ 64 int acpi_pci_disabled; /* skip ACPI PCI scan and IRQ initialization */ 65 EXPORT_SYMBOL(acpi_pci_disabled); 66 67 int acpi_lapic; 68 int acpi_ioapic; 69 int acpi_strict; 70 int acpi_disable_cmcff; 71 72 /* ACPI SCI override configuration */ 73 u8 acpi_sci_flags __initdata; 74 u32 acpi_sci_override_gsi __initdata = INVALID_ACPI_IRQ; 75 int acpi_skip_timer_override __initdata; 76 int acpi_use_timer_override __initdata; 77 int acpi_fix_pin2_polarity __initdata; 78 79 #ifdef CONFIG_X86_LOCAL_APIC 80 static u64 acpi_lapic_addr __initdata = APIC_DEFAULT_PHYS_BASE; 81 #endif 82 83 #ifdef CONFIG_X86_IO_APIC 84 /* 85 * Locks related to IOAPIC hotplug 86 * Hotplug side: 87 * ->device_hotplug_lock 88 * ->acpi_ioapic_lock 89 * ->ioapic_lock 90 * Interrupt mapping side: 91 * ->acpi_ioapic_lock 92 * ->ioapic_mutex 93 * ->ioapic_lock 94 */ 95 static DEFINE_MUTEX(acpi_ioapic_lock); 96 #endif 97 98 /* -------------------------------------------------------------------------- 99 Boot-time Configuration 100 -------------------------------------------------------------------------- */ 101 102 /* 103 * The default interrupt routing model is PIC (8259). This gets 104 * overridden if IOAPICs are enumerated (below). 105 */ 106 enum acpi_irq_model_id acpi_irq_model = ACPI_IRQ_MODEL_PIC; 107 108 109 /* 110 * ISA irqs by default are the first 16 gsis but can be 111 * any gsi as specified by an interrupt source override. 112 */ 113 static u32 isa_irq_to_gsi[NR_IRQS_LEGACY] __read_mostly = { 114 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 115 }; 116 117 /* 118 * This is just a simple wrapper around early_memremap(), 119 * with sanity checks for phys == 0 and size == 0. 120 */ 121 void __init __iomem *__acpi_map_table(unsigned long phys, unsigned long size) 122 { 123 124 if (!phys || !size) 125 return NULL; 126 127 return early_memremap(phys, size); 128 } 129 130 void __init __acpi_unmap_table(void __iomem *map, unsigned long size) 131 { 132 if (!map || !size) 133 return; 134 135 early_memunmap(map, size); 136 } 137 138 #ifdef CONFIG_X86_LOCAL_APIC 139 static int __init acpi_parse_madt(struct acpi_table_header *table) 140 { 141 struct acpi_table_madt *madt = NULL; 142 143 if (!boot_cpu_has(X86_FEATURE_APIC)) 144 return -EINVAL; 145 146 madt = (struct acpi_table_madt *)table; 147 if (!madt) { 148 printk(KERN_WARNING PREFIX "Unable to map MADT\n"); 149 return -ENODEV; 150 } 151 152 if (madt->address) { 153 acpi_lapic_addr = (u64) madt->address; 154 155 printk(KERN_DEBUG PREFIX "Local APIC address 0x%08x\n", 156 madt->address); 157 } 158 159 default_acpi_madt_oem_check(madt->header.oem_id, 160 madt->header.oem_table_id); 161 162 return 0; 163 } 164 165 /** 166 * acpi_register_lapic - register a local apic and generates a logic cpu number 167 * @id: local apic id to register 168 * @acpiid: ACPI id to register 169 * @enabled: this cpu is enabled or not 170 * 171 * Returns the logic cpu number which maps to the local apic 172 */ 173 static int acpi_register_lapic(int id, u32 acpiid, u8 enabled) 174 { 175 unsigned int ver = 0; 176 int cpu; 177 178 if (id >= MAX_LOCAL_APIC) { 179 printk(KERN_INFO PREFIX "skipped apicid that is too big\n"); 180 return -EINVAL; 181 } 182 183 if (!enabled) { 184 ++disabled_cpus; 185 return -EINVAL; 186 } 187 188 if (boot_cpu_physical_apicid != -1U) 189 ver = boot_cpu_apic_version; 190 191 cpu = generic_processor_info(id, ver); 192 if (cpu >= 0) 193 early_per_cpu(x86_cpu_to_acpiid, cpu) = acpiid; 194 195 return cpu; 196 } 197 198 static int __init 199 acpi_parse_x2apic(struct acpi_subtable_header *header, const unsigned long end) 200 { 201 struct acpi_madt_local_x2apic *processor = NULL; 202 #ifdef CONFIG_X86_X2APIC 203 u32 apic_id; 204 u8 enabled; 205 #endif 206 207 processor = (struct acpi_madt_local_x2apic *)header; 208 209 if (BAD_MADT_ENTRY(processor, end)) 210 return -EINVAL; 211 212 acpi_table_print_madt_entry(header); 213 214 #ifdef CONFIG_X86_X2APIC 215 apic_id = processor->local_apic_id; 216 enabled = processor->lapic_flags & ACPI_MADT_ENABLED; 217 218 /* Ignore invalid ID */ 219 if (apic_id == 0xffffffff) 220 return 0; 221 222 /* 223 * We need to register disabled CPU as well to permit 224 * counting disabled CPUs. This allows us to size 225 * cpus_possible_map more accurately, to permit 226 * to not preallocating memory for all NR_CPUS 227 * when we use CPU hotplug. 228 */ 229 if (!apic->apic_id_valid(apic_id)) { 230 if (enabled) 231 pr_warn(PREFIX "x2apic entry ignored\n"); 232 return 0; 233 } 234 235 acpi_register_lapic(apic_id, processor->uid, enabled); 236 #else 237 printk(KERN_WARNING PREFIX "x2apic entry ignored\n"); 238 #endif 239 240 return 0; 241 } 242 243 static int __init 244 acpi_parse_lapic(struct acpi_subtable_header * header, const unsigned long end) 245 { 246 struct acpi_madt_local_apic *processor = NULL; 247 248 processor = (struct acpi_madt_local_apic *)header; 249 250 if (BAD_MADT_ENTRY(processor, end)) 251 return -EINVAL; 252 253 acpi_table_print_madt_entry(header); 254 255 /* Ignore invalid ID */ 256 if (processor->id == 0xff) 257 return 0; 258 259 /* 260 * We need to register disabled CPU as well to permit 261 * counting disabled CPUs. This allows us to size 262 * cpus_possible_map more accurately, to permit 263 * to not preallocating memory for all NR_CPUS 264 * when we use CPU hotplug. 265 */ 266 acpi_register_lapic(processor->id, /* APIC ID */ 267 processor->processor_id, /* ACPI ID */ 268 processor->lapic_flags & ACPI_MADT_ENABLED); 269 270 return 0; 271 } 272 273 static int __init 274 acpi_parse_sapic(struct acpi_subtable_header *header, const unsigned long end) 275 { 276 struct acpi_madt_local_sapic *processor = NULL; 277 278 processor = (struct acpi_madt_local_sapic *)header; 279 280 if (BAD_MADT_ENTRY(processor, end)) 281 return -EINVAL; 282 283 acpi_table_print_madt_entry(header); 284 285 acpi_register_lapic((processor->id << 8) | processor->eid,/* APIC ID */ 286 processor->processor_id, /* ACPI ID */ 287 processor->lapic_flags & ACPI_MADT_ENABLED); 288 289 return 0; 290 } 291 292 static int __init 293 acpi_parse_lapic_addr_ovr(struct acpi_subtable_header * header, 294 const unsigned long end) 295 { 296 struct acpi_madt_local_apic_override *lapic_addr_ovr = NULL; 297 298 lapic_addr_ovr = (struct acpi_madt_local_apic_override *)header; 299 300 if (BAD_MADT_ENTRY(lapic_addr_ovr, end)) 301 return -EINVAL; 302 303 acpi_table_print_madt_entry(header); 304 305 acpi_lapic_addr = lapic_addr_ovr->address; 306 307 return 0; 308 } 309 310 static int __init 311 acpi_parse_x2apic_nmi(struct acpi_subtable_header *header, 312 const unsigned long end) 313 { 314 struct acpi_madt_local_x2apic_nmi *x2apic_nmi = NULL; 315 316 x2apic_nmi = (struct acpi_madt_local_x2apic_nmi *)header; 317 318 if (BAD_MADT_ENTRY(x2apic_nmi, end)) 319 return -EINVAL; 320 321 acpi_table_print_madt_entry(header); 322 323 if (x2apic_nmi->lint != 1) 324 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n"); 325 326 return 0; 327 } 328 329 static int __init 330 acpi_parse_lapic_nmi(struct acpi_subtable_header * header, const unsigned long end) 331 { 332 struct acpi_madt_local_apic_nmi *lapic_nmi = NULL; 333 334 lapic_nmi = (struct acpi_madt_local_apic_nmi *)header; 335 336 if (BAD_MADT_ENTRY(lapic_nmi, end)) 337 return -EINVAL; 338 339 acpi_table_print_madt_entry(header); 340 341 if (lapic_nmi->lint != 1) 342 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n"); 343 344 return 0; 345 } 346 347 #endif /*CONFIG_X86_LOCAL_APIC */ 348 349 #ifdef CONFIG_X86_IO_APIC 350 #define MP_ISA_BUS 0 351 352 static int __init mp_register_ioapic_irq(u8 bus_irq, u8 polarity, 353 u8 trigger, u32 gsi); 354 355 static void __init mp_override_legacy_irq(u8 bus_irq, u8 polarity, u8 trigger, 356 u32 gsi) 357 { 358 /* 359 * Check bus_irq boundary. 360 */ 361 if (bus_irq >= NR_IRQS_LEGACY) { 362 pr_warn("Invalid bus_irq %u for legacy override\n", bus_irq); 363 return; 364 } 365 366 /* 367 * TBD: This check is for faulty timer entries, where the override 368 * erroneously sets the trigger to level, resulting in a HUGE 369 * increase of timer interrupts! 370 */ 371 if ((bus_irq == 0) && (trigger == 3)) 372 trigger = 1; 373 374 if (mp_register_ioapic_irq(bus_irq, polarity, trigger, gsi) < 0) 375 return; 376 /* 377 * Reset default identity mapping if gsi is also an legacy IRQ, 378 * otherwise there will be more than one entry with the same GSI 379 * and acpi_isa_irq_to_gsi() may give wrong result. 380 */ 381 if (gsi < nr_legacy_irqs() && isa_irq_to_gsi[gsi] == gsi) 382 isa_irq_to_gsi[gsi] = INVALID_ACPI_IRQ; 383 isa_irq_to_gsi[bus_irq] = gsi; 384 } 385 386 static int mp_config_acpi_gsi(struct device *dev, u32 gsi, int trigger, 387 int polarity) 388 { 389 #ifdef CONFIG_X86_MPPARSE 390 struct mpc_intsrc mp_irq; 391 struct pci_dev *pdev; 392 unsigned char number; 393 unsigned int devfn; 394 int ioapic; 395 u8 pin; 396 397 if (!acpi_ioapic) 398 return 0; 399 if (!dev || !dev_is_pci(dev)) 400 return 0; 401 402 pdev = to_pci_dev(dev); 403 number = pdev->bus->number; 404 devfn = pdev->devfn; 405 pin = pdev->pin; 406 /* print the entry should happen on mptable identically */ 407 mp_irq.type = MP_INTSRC; 408 mp_irq.irqtype = mp_INT; 409 mp_irq.irqflag = (trigger == ACPI_EDGE_SENSITIVE ? 4 : 0x0c) | 410 (polarity == ACPI_ACTIVE_HIGH ? 1 : 3); 411 mp_irq.srcbus = number; 412 mp_irq.srcbusirq = (((devfn >> 3) & 0x1f) << 2) | ((pin - 1) & 3); 413 ioapic = mp_find_ioapic(gsi); 414 mp_irq.dstapic = mpc_ioapic_id(ioapic); 415 mp_irq.dstirq = mp_find_ioapic_pin(ioapic, gsi); 416 417 mp_save_irq(&mp_irq); 418 #endif 419 return 0; 420 } 421 422 static int __init mp_register_ioapic_irq(u8 bus_irq, u8 polarity, 423 u8 trigger, u32 gsi) 424 { 425 struct mpc_intsrc mp_irq; 426 int ioapic, pin; 427 428 /* Convert 'gsi' to 'ioapic.pin'(INTIN#) */ 429 ioapic = mp_find_ioapic(gsi); 430 if (ioapic < 0) { 431 pr_warn("Failed to find ioapic for gsi : %u\n", gsi); 432 return ioapic; 433 } 434 435 pin = mp_find_ioapic_pin(ioapic, gsi); 436 437 mp_irq.type = MP_INTSRC; 438 mp_irq.irqtype = mp_INT; 439 mp_irq.irqflag = (trigger << 2) | polarity; 440 mp_irq.srcbus = MP_ISA_BUS; 441 mp_irq.srcbusirq = bus_irq; 442 mp_irq.dstapic = mpc_ioapic_id(ioapic); 443 mp_irq.dstirq = pin; 444 445 mp_save_irq(&mp_irq); 446 447 return 0; 448 } 449 450 static int __init 451 acpi_parse_ioapic(struct acpi_subtable_header * header, const unsigned long end) 452 { 453 struct acpi_madt_io_apic *ioapic = NULL; 454 struct ioapic_domain_cfg cfg = { 455 .type = IOAPIC_DOMAIN_DYNAMIC, 456 .ops = &mp_ioapic_irqdomain_ops, 457 }; 458 459 ioapic = (struct acpi_madt_io_apic *)header; 460 461 if (BAD_MADT_ENTRY(ioapic, end)) 462 return -EINVAL; 463 464 acpi_table_print_madt_entry(header); 465 466 /* Statically assign IRQ numbers for IOAPICs hosting legacy IRQs */ 467 if (ioapic->global_irq_base < nr_legacy_irqs()) 468 cfg.type = IOAPIC_DOMAIN_LEGACY; 469 470 mp_register_ioapic(ioapic->id, ioapic->address, ioapic->global_irq_base, 471 &cfg); 472 473 return 0; 474 } 475 476 /* 477 * Parse Interrupt Source Override for the ACPI SCI 478 */ 479 static void __init acpi_sci_ioapic_setup(u8 bus_irq, u16 polarity, u16 trigger, u32 gsi) 480 { 481 if (trigger == 0) /* compatible SCI trigger is level */ 482 trigger = 3; 483 484 if (polarity == 0) /* compatible SCI polarity is low */ 485 polarity = 3; 486 487 /* Command-line over-ride via acpi_sci= */ 488 if (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) 489 trigger = (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2; 490 491 if (acpi_sci_flags & ACPI_MADT_POLARITY_MASK) 492 polarity = acpi_sci_flags & ACPI_MADT_POLARITY_MASK; 493 494 if (bus_irq < NR_IRQS_LEGACY) 495 mp_override_legacy_irq(bus_irq, polarity, trigger, gsi); 496 else 497 mp_register_ioapic_irq(bus_irq, polarity, trigger, gsi); 498 499 acpi_penalize_sci_irq(bus_irq, trigger, polarity); 500 501 /* 502 * stash over-ride to indicate we've been here 503 * and for later update of acpi_gbl_FADT 504 */ 505 acpi_sci_override_gsi = gsi; 506 return; 507 } 508 509 static int __init 510 acpi_parse_int_src_ovr(struct acpi_subtable_header * header, 511 const unsigned long end) 512 { 513 struct acpi_madt_interrupt_override *intsrc = NULL; 514 515 intsrc = (struct acpi_madt_interrupt_override *)header; 516 517 if (BAD_MADT_ENTRY(intsrc, end)) 518 return -EINVAL; 519 520 acpi_table_print_madt_entry(header); 521 522 if (intsrc->source_irq == acpi_gbl_FADT.sci_interrupt) { 523 acpi_sci_ioapic_setup(intsrc->source_irq, 524 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK, 525 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2, 526 intsrc->global_irq); 527 return 0; 528 } 529 530 if (intsrc->source_irq == 0) { 531 if (acpi_skip_timer_override) { 532 printk(PREFIX "BIOS IRQ0 override ignored.\n"); 533 return 0; 534 } 535 536 if ((intsrc->global_irq == 2) && acpi_fix_pin2_polarity 537 && (intsrc->inti_flags & ACPI_MADT_POLARITY_MASK)) { 538 intsrc->inti_flags &= ~ACPI_MADT_POLARITY_MASK; 539 printk(PREFIX "BIOS IRQ0 pin2 override: forcing polarity to high active.\n"); 540 } 541 } 542 543 mp_override_legacy_irq(intsrc->source_irq, 544 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK, 545 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2, 546 intsrc->global_irq); 547 548 return 0; 549 } 550 551 static int __init 552 acpi_parse_nmi_src(struct acpi_subtable_header * header, const unsigned long end) 553 { 554 struct acpi_madt_nmi_source *nmi_src = NULL; 555 556 nmi_src = (struct acpi_madt_nmi_source *)header; 557 558 if (BAD_MADT_ENTRY(nmi_src, end)) 559 return -EINVAL; 560 561 acpi_table_print_madt_entry(header); 562 563 /* TBD: Support nimsrc entries? */ 564 565 return 0; 566 } 567 568 #endif /* CONFIG_X86_IO_APIC */ 569 570 /* 571 * acpi_pic_sci_set_trigger() 572 * 573 * use ELCR to set PIC-mode trigger type for SCI 574 * 575 * If a PIC-mode SCI is not recognized or gives spurious IRQ7's 576 * it may require Edge Trigger -- use "acpi_sci=edge" 577 * 578 * Port 0x4d0-4d1 are ECLR1 and ECLR2, the Edge/Level Control Registers 579 * for the 8259 PIC. bit[n] = 1 means irq[n] is Level, otherwise Edge. 580 * ECLR1 is IRQs 0-7 (IRQ 0, 1, 2 must be 0) 581 * ECLR2 is IRQs 8-15 (IRQ 8, 13 must be 0) 582 */ 583 584 void __init acpi_pic_sci_set_trigger(unsigned int irq, u16 trigger) 585 { 586 unsigned int mask = 1 << irq; 587 unsigned int old, new; 588 589 /* Real old ELCR mask */ 590 old = inb(0x4d0) | (inb(0x4d1) << 8); 591 592 /* 593 * If we use ACPI to set PCI IRQs, then we should clear ELCR 594 * since we will set it correctly as we enable the PCI irq 595 * routing. 596 */ 597 new = acpi_noirq ? old : 0; 598 599 /* 600 * Update SCI information in the ELCR, it isn't in the PCI 601 * routing tables.. 602 */ 603 switch (trigger) { 604 case 1: /* Edge - clear */ 605 new &= ~mask; 606 break; 607 case 3: /* Level - set */ 608 new |= mask; 609 break; 610 } 611 612 if (old == new) 613 return; 614 615 printk(PREFIX "setting ELCR to %04x (from %04x)\n", new, old); 616 outb(new, 0x4d0); 617 outb(new >> 8, 0x4d1); 618 } 619 620 int acpi_gsi_to_irq(u32 gsi, unsigned int *irqp) 621 { 622 int rc, irq, trigger, polarity; 623 624 if (acpi_irq_model == ACPI_IRQ_MODEL_PIC) { 625 *irqp = gsi; 626 return 0; 627 } 628 629 rc = acpi_get_override_irq(gsi, &trigger, &polarity); 630 if (rc) 631 return rc; 632 633 trigger = trigger ? ACPI_LEVEL_SENSITIVE : ACPI_EDGE_SENSITIVE; 634 polarity = polarity ? ACPI_ACTIVE_LOW : ACPI_ACTIVE_HIGH; 635 irq = acpi_register_gsi(NULL, gsi, trigger, polarity); 636 if (irq < 0) 637 return irq; 638 639 *irqp = irq; 640 return 0; 641 } 642 EXPORT_SYMBOL_GPL(acpi_gsi_to_irq); 643 644 int acpi_isa_irq_to_gsi(unsigned isa_irq, u32 *gsi) 645 { 646 if (isa_irq < nr_legacy_irqs() && 647 isa_irq_to_gsi[isa_irq] != INVALID_ACPI_IRQ) { 648 *gsi = isa_irq_to_gsi[isa_irq]; 649 return 0; 650 } 651 652 return -1; 653 } 654 655 static int acpi_register_gsi_pic(struct device *dev, u32 gsi, 656 int trigger, int polarity) 657 { 658 #ifdef CONFIG_PCI 659 /* 660 * Make sure all (legacy) PCI IRQs are set as level-triggered. 661 */ 662 if (trigger == ACPI_LEVEL_SENSITIVE) 663 elcr_set_level_irq(gsi); 664 #endif 665 666 return gsi; 667 } 668 669 #ifdef CONFIG_X86_LOCAL_APIC 670 static int acpi_register_gsi_ioapic(struct device *dev, u32 gsi, 671 int trigger, int polarity) 672 { 673 int irq = gsi; 674 #ifdef CONFIG_X86_IO_APIC 675 int node; 676 struct irq_alloc_info info; 677 678 node = dev ? dev_to_node(dev) : NUMA_NO_NODE; 679 trigger = trigger == ACPI_EDGE_SENSITIVE ? 0 : 1; 680 polarity = polarity == ACPI_ACTIVE_HIGH ? 0 : 1; 681 ioapic_set_alloc_attr(&info, node, trigger, polarity); 682 683 mutex_lock(&acpi_ioapic_lock); 684 irq = mp_map_gsi_to_irq(gsi, IOAPIC_MAP_ALLOC, &info); 685 /* Don't set up the ACPI SCI because it's already set up */ 686 if (irq >= 0 && enable_update_mptable && gsi != acpi_gbl_FADT.sci_interrupt) 687 mp_config_acpi_gsi(dev, gsi, trigger, polarity); 688 mutex_unlock(&acpi_ioapic_lock); 689 #endif 690 691 return irq; 692 } 693 694 static void acpi_unregister_gsi_ioapic(u32 gsi) 695 { 696 #ifdef CONFIG_X86_IO_APIC 697 int irq; 698 699 mutex_lock(&acpi_ioapic_lock); 700 irq = mp_map_gsi_to_irq(gsi, 0, NULL); 701 if (irq > 0) 702 mp_unmap_irq(irq); 703 mutex_unlock(&acpi_ioapic_lock); 704 #endif 705 } 706 #endif 707 708 int (*__acpi_register_gsi)(struct device *dev, u32 gsi, 709 int trigger, int polarity) = acpi_register_gsi_pic; 710 void (*__acpi_unregister_gsi)(u32 gsi) = NULL; 711 712 #ifdef CONFIG_ACPI_SLEEP 713 int (*acpi_suspend_lowlevel)(void) = x86_acpi_suspend_lowlevel; 714 #else 715 int (*acpi_suspend_lowlevel)(void); 716 #endif 717 718 /* 719 * success: return IRQ number (>=0) 720 * failure: return < 0 721 */ 722 int acpi_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity) 723 { 724 return __acpi_register_gsi(dev, gsi, trigger, polarity); 725 } 726 EXPORT_SYMBOL_GPL(acpi_register_gsi); 727 728 void acpi_unregister_gsi(u32 gsi) 729 { 730 if (__acpi_unregister_gsi) 731 __acpi_unregister_gsi(gsi); 732 } 733 EXPORT_SYMBOL_GPL(acpi_unregister_gsi); 734 735 #ifdef CONFIG_X86_LOCAL_APIC 736 static void __init acpi_set_irq_model_ioapic(void) 737 { 738 acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC; 739 __acpi_register_gsi = acpi_register_gsi_ioapic; 740 __acpi_unregister_gsi = acpi_unregister_gsi_ioapic; 741 acpi_ioapic = 1; 742 } 743 #endif 744 745 /* 746 * ACPI based hotplug support for CPU 747 */ 748 #ifdef CONFIG_ACPI_HOTPLUG_CPU 749 #include <acpi/processor.h> 750 751 static int acpi_map_cpu2node(acpi_handle handle, int cpu, int physid) 752 { 753 #ifdef CONFIG_ACPI_NUMA 754 int nid; 755 756 nid = acpi_get_node(handle); 757 if (nid != NUMA_NO_NODE) { 758 set_apicid_to_node(physid, nid); 759 numa_set_node(cpu, nid); 760 } 761 #endif 762 return 0; 763 } 764 765 int acpi_map_cpu(acpi_handle handle, phys_cpuid_t physid, u32 acpi_id, 766 int *pcpu) 767 { 768 int cpu; 769 770 cpu = acpi_register_lapic(physid, acpi_id, ACPI_MADT_ENABLED); 771 if (cpu < 0) { 772 pr_info(PREFIX "Unable to map lapic to logical cpu number\n"); 773 return cpu; 774 } 775 776 acpi_processor_set_pdc(handle); 777 acpi_map_cpu2node(handle, cpu, physid); 778 779 *pcpu = cpu; 780 return 0; 781 } 782 EXPORT_SYMBOL(acpi_map_cpu); 783 784 int acpi_unmap_cpu(int cpu) 785 { 786 #ifdef CONFIG_ACPI_NUMA 787 set_apicid_to_node(per_cpu(x86_cpu_to_apicid, cpu), NUMA_NO_NODE); 788 #endif 789 790 per_cpu(x86_cpu_to_apicid, cpu) = -1; 791 set_cpu_present(cpu, false); 792 num_processors--; 793 794 return (0); 795 } 796 EXPORT_SYMBOL(acpi_unmap_cpu); 797 #endif /* CONFIG_ACPI_HOTPLUG_CPU */ 798 799 int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base) 800 { 801 int ret = -ENOSYS; 802 #ifdef CONFIG_ACPI_HOTPLUG_IOAPIC 803 int ioapic_id; 804 u64 addr; 805 struct ioapic_domain_cfg cfg = { 806 .type = IOAPIC_DOMAIN_DYNAMIC, 807 .ops = &mp_ioapic_irqdomain_ops, 808 }; 809 810 ioapic_id = acpi_get_ioapic_id(handle, gsi_base, &addr); 811 if (ioapic_id < 0) { 812 unsigned long long uid; 813 acpi_status status; 814 815 status = acpi_evaluate_integer(handle, METHOD_NAME__UID, 816 NULL, &uid); 817 if (ACPI_FAILURE(status)) { 818 acpi_handle_warn(handle, "failed to get IOAPIC ID.\n"); 819 return -EINVAL; 820 } 821 ioapic_id = (int)uid; 822 } 823 824 mutex_lock(&acpi_ioapic_lock); 825 ret = mp_register_ioapic(ioapic_id, phys_addr, gsi_base, &cfg); 826 mutex_unlock(&acpi_ioapic_lock); 827 #endif 828 829 return ret; 830 } 831 EXPORT_SYMBOL(acpi_register_ioapic); 832 833 int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base) 834 { 835 int ret = -ENOSYS; 836 837 #ifdef CONFIG_ACPI_HOTPLUG_IOAPIC 838 mutex_lock(&acpi_ioapic_lock); 839 ret = mp_unregister_ioapic(gsi_base); 840 mutex_unlock(&acpi_ioapic_lock); 841 #endif 842 843 return ret; 844 } 845 EXPORT_SYMBOL(acpi_unregister_ioapic); 846 847 /** 848 * acpi_ioapic_registered - Check whether IOAPIC assoicatied with @gsi_base 849 * has been registered 850 * @handle: ACPI handle of the IOAPIC deivce 851 * @gsi_base: GSI base associated with the IOAPIC 852 * 853 * Assume caller holds some type of lock to serialize acpi_ioapic_registered() 854 * with acpi_register_ioapic()/acpi_unregister_ioapic(). 855 */ 856 int acpi_ioapic_registered(acpi_handle handle, u32 gsi_base) 857 { 858 int ret = 0; 859 860 #ifdef CONFIG_ACPI_HOTPLUG_IOAPIC 861 mutex_lock(&acpi_ioapic_lock); 862 ret = mp_ioapic_registered(gsi_base); 863 mutex_unlock(&acpi_ioapic_lock); 864 #endif 865 866 return ret; 867 } 868 869 static int __init acpi_parse_sbf(struct acpi_table_header *table) 870 { 871 struct acpi_table_boot *sb = (struct acpi_table_boot *)table; 872 873 sbf_port = sb->cmos_index; /* Save CMOS port */ 874 875 return 0; 876 } 877 878 #ifdef CONFIG_HPET_TIMER 879 #include <asm/hpet.h> 880 881 static struct resource *hpet_res __initdata; 882 883 static int __init acpi_parse_hpet(struct acpi_table_header *table) 884 { 885 struct acpi_table_hpet *hpet_tbl = (struct acpi_table_hpet *)table; 886 887 if (hpet_tbl->address.space_id != ACPI_SPACE_MEM) { 888 printk(KERN_WARNING PREFIX "HPET timers must be located in " 889 "memory.\n"); 890 return -1; 891 } 892 893 hpet_address = hpet_tbl->address.address; 894 hpet_blockid = hpet_tbl->sequence; 895 896 /* 897 * Some broken BIOSes advertise HPET at 0x0. We really do not 898 * want to allocate a resource there. 899 */ 900 if (!hpet_address) { 901 printk(KERN_WARNING PREFIX 902 "HPET id: %#x base: %#lx is invalid\n", 903 hpet_tbl->id, hpet_address); 904 return 0; 905 } 906 #ifdef CONFIG_X86_64 907 /* 908 * Some even more broken BIOSes advertise HPET at 909 * 0xfed0000000000000 instead of 0xfed00000. Fix it up and add 910 * some noise: 911 */ 912 if (hpet_address == 0xfed0000000000000UL) { 913 if (!hpet_force_user) { 914 printk(KERN_WARNING PREFIX "HPET id: %#x " 915 "base: 0xfed0000000000000 is bogus\n " 916 "try hpet=force on the kernel command line to " 917 "fix it up to 0xfed00000.\n", hpet_tbl->id); 918 hpet_address = 0; 919 return 0; 920 } 921 printk(KERN_WARNING PREFIX 922 "HPET id: %#x base: 0xfed0000000000000 fixed up " 923 "to 0xfed00000.\n", hpet_tbl->id); 924 hpet_address >>= 32; 925 } 926 #endif 927 printk(KERN_INFO PREFIX "HPET id: %#x base: %#lx\n", 928 hpet_tbl->id, hpet_address); 929 930 /* 931 * Allocate and initialize the HPET firmware resource for adding into 932 * the resource tree during the lateinit timeframe. 933 */ 934 #define HPET_RESOURCE_NAME_SIZE 9 935 hpet_res = alloc_bootmem(sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE); 936 937 hpet_res->name = (void *)&hpet_res[1]; 938 hpet_res->flags = IORESOURCE_MEM; 939 snprintf((char *)hpet_res->name, HPET_RESOURCE_NAME_SIZE, "HPET %u", 940 hpet_tbl->sequence); 941 942 hpet_res->start = hpet_address; 943 hpet_res->end = hpet_address + (1 * 1024) - 1; 944 945 return 0; 946 } 947 948 /* 949 * hpet_insert_resource inserts the HPET resources used into the resource 950 * tree. 951 */ 952 static __init int hpet_insert_resource(void) 953 { 954 if (!hpet_res) 955 return 1; 956 957 return insert_resource(&iomem_resource, hpet_res); 958 } 959 960 late_initcall(hpet_insert_resource); 961 962 #else 963 #define acpi_parse_hpet NULL 964 #endif 965 966 static int __init acpi_parse_fadt(struct acpi_table_header *table) 967 { 968 if (!(acpi_gbl_FADT.boot_flags & ACPI_FADT_LEGACY_DEVICES)) { 969 pr_debug("ACPI: no legacy devices present\n"); 970 x86_platform.legacy.devices.pnpbios = 0; 971 } 972 973 if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID && 974 !(acpi_gbl_FADT.boot_flags & ACPI_FADT_8042) && 975 x86_platform.legacy.i8042 != X86_LEGACY_I8042_PLATFORM_ABSENT) { 976 pr_debug("ACPI: i8042 controller is absent\n"); 977 x86_platform.legacy.i8042 = X86_LEGACY_I8042_FIRMWARE_ABSENT; 978 } 979 980 if (acpi_gbl_FADT.boot_flags & ACPI_FADT_NO_CMOS_RTC) { 981 pr_debug("ACPI: not registering RTC platform device\n"); 982 x86_platform.legacy.rtc = 0; 983 } 984 985 if (acpi_gbl_FADT.boot_flags & ACPI_FADT_NO_VGA) { 986 pr_debug("ACPI: probing for VGA not safe\n"); 987 x86_platform.legacy.no_vga = 1; 988 } 989 990 #ifdef CONFIG_X86_PM_TIMER 991 /* detect the location of the ACPI PM Timer */ 992 if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID) { 993 /* FADT rev. 2 */ 994 if (acpi_gbl_FADT.xpm_timer_block.space_id != 995 ACPI_ADR_SPACE_SYSTEM_IO) 996 return 0; 997 998 pmtmr_ioport = acpi_gbl_FADT.xpm_timer_block.address; 999 /* 1000 * "X" fields are optional extensions to the original V1.0 1001 * fields, so we must selectively expand V1.0 fields if the 1002 * corresponding X field is zero. 1003 */ 1004 if (!pmtmr_ioport) 1005 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block; 1006 } else { 1007 /* FADT rev. 1 */ 1008 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block; 1009 } 1010 if (pmtmr_ioport) 1011 printk(KERN_INFO PREFIX "PM-Timer IO Port: %#x\n", 1012 pmtmr_ioport); 1013 #endif 1014 return 0; 1015 } 1016 1017 #ifdef CONFIG_X86_LOCAL_APIC 1018 /* 1019 * Parse LAPIC entries in MADT 1020 * returns 0 on success, < 0 on error 1021 */ 1022 1023 static int __init early_acpi_parse_madt_lapic_addr_ovr(void) 1024 { 1025 int count; 1026 1027 if (!boot_cpu_has(X86_FEATURE_APIC)) 1028 return -ENODEV; 1029 1030 /* 1031 * Note that the LAPIC address is obtained from the MADT (32-bit value) 1032 * and (optionally) overridden by a LAPIC_ADDR_OVR entry (64-bit value). 1033 */ 1034 1035 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE, 1036 acpi_parse_lapic_addr_ovr, 0); 1037 if (count < 0) { 1038 printk(KERN_ERR PREFIX 1039 "Error parsing LAPIC address override entry\n"); 1040 return count; 1041 } 1042 1043 register_lapic_address(acpi_lapic_addr); 1044 1045 return count; 1046 } 1047 1048 static int __init acpi_parse_madt_lapic_entries(void) 1049 { 1050 int count; 1051 int x2count = 0; 1052 int ret; 1053 struct acpi_subtable_proc madt_proc[2]; 1054 1055 if (!boot_cpu_has(X86_FEATURE_APIC)) 1056 return -ENODEV; 1057 1058 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC, 1059 acpi_parse_sapic, MAX_LOCAL_APIC); 1060 1061 if (!count) { 1062 memset(madt_proc, 0, sizeof(madt_proc)); 1063 madt_proc[0].id = ACPI_MADT_TYPE_LOCAL_APIC; 1064 madt_proc[0].handler = acpi_parse_lapic; 1065 madt_proc[1].id = ACPI_MADT_TYPE_LOCAL_X2APIC; 1066 madt_proc[1].handler = acpi_parse_x2apic; 1067 ret = acpi_table_parse_entries_array(ACPI_SIG_MADT, 1068 sizeof(struct acpi_table_madt), 1069 madt_proc, ARRAY_SIZE(madt_proc), MAX_LOCAL_APIC); 1070 if (ret < 0) { 1071 printk(KERN_ERR PREFIX 1072 "Error parsing LAPIC/X2APIC entries\n"); 1073 return ret; 1074 } 1075 1076 count = madt_proc[0].count; 1077 x2count = madt_proc[1].count; 1078 } 1079 if (!count && !x2count) { 1080 printk(KERN_ERR PREFIX "No LAPIC entries present\n"); 1081 /* TBD: Cleanup to allow fallback to MPS */ 1082 return -ENODEV; 1083 } else if (count < 0 || x2count < 0) { 1084 printk(KERN_ERR PREFIX "Error parsing LAPIC entry\n"); 1085 /* TBD: Cleanup to allow fallback to MPS */ 1086 return count; 1087 } 1088 1089 x2count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC_NMI, 1090 acpi_parse_x2apic_nmi, 0); 1091 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI, 1092 acpi_parse_lapic_nmi, 0); 1093 if (count < 0 || x2count < 0) { 1094 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n"); 1095 /* TBD: Cleanup to allow fallback to MPS */ 1096 return count; 1097 } 1098 return 0; 1099 } 1100 #endif /* CONFIG_X86_LOCAL_APIC */ 1101 1102 #ifdef CONFIG_X86_IO_APIC 1103 static void __init mp_config_acpi_legacy_irqs(void) 1104 { 1105 int i; 1106 struct mpc_intsrc mp_irq; 1107 1108 #ifdef CONFIG_EISA 1109 /* 1110 * Fabricate the legacy ISA bus (bus #31). 1111 */ 1112 mp_bus_id_to_type[MP_ISA_BUS] = MP_BUS_ISA; 1113 #endif 1114 set_bit(MP_ISA_BUS, mp_bus_not_pci); 1115 pr_debug("Bus #%d is ISA (nIRQs: %d)\n", MP_ISA_BUS, nr_legacy_irqs()); 1116 1117 /* 1118 * Use the default configuration for the IRQs 0-15. Unless 1119 * overridden by (MADT) interrupt source override entries. 1120 */ 1121 for (i = 0; i < nr_legacy_irqs(); i++) { 1122 int ioapic, pin; 1123 unsigned int dstapic; 1124 int idx; 1125 u32 gsi; 1126 1127 /* Locate the gsi that irq i maps to. */ 1128 if (acpi_isa_irq_to_gsi(i, &gsi)) 1129 continue; 1130 1131 /* 1132 * Locate the IOAPIC that manages the ISA IRQ. 1133 */ 1134 ioapic = mp_find_ioapic(gsi); 1135 if (ioapic < 0) 1136 continue; 1137 pin = mp_find_ioapic_pin(ioapic, gsi); 1138 dstapic = mpc_ioapic_id(ioapic); 1139 1140 for (idx = 0; idx < mp_irq_entries; idx++) { 1141 struct mpc_intsrc *irq = mp_irqs + idx; 1142 1143 /* Do we already have a mapping for this ISA IRQ? */ 1144 if (irq->srcbus == MP_ISA_BUS && irq->srcbusirq == i) 1145 break; 1146 1147 /* Do we already have a mapping for this IOAPIC pin */ 1148 if (irq->dstapic == dstapic && irq->dstirq == pin) 1149 break; 1150 } 1151 1152 if (idx != mp_irq_entries) { 1153 printk(KERN_DEBUG "ACPI: IRQ%d used by override.\n", i); 1154 continue; /* IRQ already used */ 1155 } 1156 1157 mp_irq.type = MP_INTSRC; 1158 mp_irq.irqflag = 0; /* Conforming */ 1159 mp_irq.srcbus = MP_ISA_BUS; 1160 mp_irq.dstapic = dstapic; 1161 mp_irq.irqtype = mp_INT; 1162 mp_irq.srcbusirq = i; /* Identity mapped */ 1163 mp_irq.dstirq = pin; 1164 1165 mp_save_irq(&mp_irq); 1166 } 1167 } 1168 1169 /* 1170 * Parse IOAPIC related entries in MADT 1171 * returns 0 on success, < 0 on error 1172 */ 1173 static int __init acpi_parse_madt_ioapic_entries(void) 1174 { 1175 int count; 1176 1177 /* 1178 * ACPI interpreter is required to complete interrupt setup, 1179 * so if it is off, don't enumerate the io-apics with ACPI. 1180 * If MPS is present, it will handle them, 1181 * otherwise the system will stay in PIC mode 1182 */ 1183 if (acpi_disabled || acpi_noirq) 1184 return -ENODEV; 1185 1186 if (!boot_cpu_has(X86_FEATURE_APIC)) 1187 return -ENODEV; 1188 1189 /* 1190 * if "noapic" boot option, don't look for IO-APICs 1191 */ 1192 if (skip_ioapic_setup) { 1193 printk(KERN_INFO PREFIX "Skipping IOAPIC probe " 1194 "due to 'noapic' option.\n"); 1195 return -ENODEV; 1196 } 1197 1198 count = acpi_table_parse_madt(ACPI_MADT_TYPE_IO_APIC, acpi_parse_ioapic, 1199 MAX_IO_APICS); 1200 if (!count) { 1201 printk(KERN_ERR PREFIX "No IOAPIC entries present\n"); 1202 return -ENODEV; 1203 } else if (count < 0) { 1204 printk(KERN_ERR PREFIX "Error parsing IOAPIC entry\n"); 1205 return count; 1206 } 1207 1208 count = acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE, 1209 acpi_parse_int_src_ovr, nr_irqs); 1210 if (count < 0) { 1211 printk(KERN_ERR PREFIX 1212 "Error parsing interrupt source overrides entry\n"); 1213 /* TBD: Cleanup to allow fallback to MPS */ 1214 return count; 1215 } 1216 1217 /* 1218 * If BIOS did not supply an INT_SRC_OVR for the SCI 1219 * pretend we got one so we can set the SCI flags. 1220 * But ignore setting up SCI on hardware reduced platforms. 1221 */ 1222 if (acpi_sci_override_gsi == INVALID_ACPI_IRQ && !acpi_gbl_reduced_hardware) 1223 acpi_sci_ioapic_setup(acpi_gbl_FADT.sci_interrupt, 0, 0, 1224 acpi_gbl_FADT.sci_interrupt); 1225 1226 /* Fill in identity legacy mappings where no override */ 1227 mp_config_acpi_legacy_irqs(); 1228 1229 count = acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE, 1230 acpi_parse_nmi_src, nr_irqs); 1231 if (count < 0) { 1232 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n"); 1233 /* TBD: Cleanup to allow fallback to MPS */ 1234 return count; 1235 } 1236 1237 return 0; 1238 } 1239 #else 1240 static inline int acpi_parse_madt_ioapic_entries(void) 1241 { 1242 return -1; 1243 } 1244 #endif /* !CONFIG_X86_IO_APIC */ 1245 1246 static void __init early_acpi_process_madt(void) 1247 { 1248 #ifdef CONFIG_X86_LOCAL_APIC 1249 int error; 1250 1251 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) { 1252 1253 /* 1254 * Parse MADT LAPIC entries 1255 */ 1256 error = early_acpi_parse_madt_lapic_addr_ovr(); 1257 if (!error) { 1258 acpi_lapic = 1; 1259 smp_found_config = 1; 1260 } 1261 if (error == -EINVAL) { 1262 /* 1263 * Dell Precision Workstation 410, 610 come here. 1264 */ 1265 printk(KERN_ERR PREFIX 1266 "Invalid BIOS MADT, disabling ACPI\n"); 1267 disable_acpi(); 1268 } 1269 } 1270 #endif 1271 } 1272 1273 static void __init acpi_process_madt(void) 1274 { 1275 #ifdef CONFIG_X86_LOCAL_APIC 1276 int error; 1277 1278 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) { 1279 1280 /* 1281 * Parse MADT LAPIC entries 1282 */ 1283 error = acpi_parse_madt_lapic_entries(); 1284 if (!error) { 1285 acpi_lapic = 1; 1286 1287 /* 1288 * Parse MADT IO-APIC entries 1289 */ 1290 mutex_lock(&acpi_ioapic_lock); 1291 error = acpi_parse_madt_ioapic_entries(); 1292 mutex_unlock(&acpi_ioapic_lock); 1293 if (!error) { 1294 acpi_set_irq_model_ioapic(); 1295 1296 smp_found_config = 1; 1297 } 1298 } 1299 if (error == -EINVAL) { 1300 /* 1301 * Dell Precision Workstation 410, 610 come here. 1302 */ 1303 printk(KERN_ERR PREFIX 1304 "Invalid BIOS MADT, disabling ACPI\n"); 1305 disable_acpi(); 1306 } 1307 } else { 1308 /* 1309 * ACPI found no MADT, and so ACPI wants UP PIC mode. 1310 * In the event an MPS table was found, forget it. 1311 * Boot with "acpi=off" to use MPS on such a system. 1312 */ 1313 if (smp_found_config) { 1314 printk(KERN_WARNING PREFIX 1315 "No APIC-table, disabling MPS\n"); 1316 smp_found_config = 0; 1317 } 1318 } 1319 1320 /* 1321 * ACPI supports both logical (e.g. Hyper-Threading) and physical 1322 * processors, where MPS only supports physical. 1323 */ 1324 if (acpi_lapic && acpi_ioapic) 1325 printk(KERN_INFO "Using ACPI (MADT) for SMP configuration " 1326 "information\n"); 1327 else if (acpi_lapic) 1328 printk(KERN_INFO "Using ACPI for processor (LAPIC) " 1329 "configuration information\n"); 1330 #endif 1331 return; 1332 } 1333 1334 static int __init disable_acpi_irq(const struct dmi_system_id *d) 1335 { 1336 if (!acpi_force) { 1337 printk(KERN_NOTICE "%s detected: force use of acpi=noirq\n", 1338 d->ident); 1339 acpi_noirq_set(); 1340 } 1341 return 0; 1342 } 1343 1344 static int __init disable_acpi_pci(const struct dmi_system_id *d) 1345 { 1346 if (!acpi_force) { 1347 printk(KERN_NOTICE "%s detected: force use of pci=noacpi\n", 1348 d->ident); 1349 acpi_disable_pci(); 1350 } 1351 return 0; 1352 } 1353 1354 static int __init dmi_disable_acpi(const struct dmi_system_id *d) 1355 { 1356 if (!acpi_force) { 1357 printk(KERN_NOTICE "%s detected: acpi off\n", d->ident); 1358 disable_acpi(); 1359 } else { 1360 printk(KERN_NOTICE 1361 "Warning: DMI blacklist says broken, but acpi forced\n"); 1362 } 1363 return 0; 1364 } 1365 1366 /* 1367 * Force ignoring BIOS IRQ0 override 1368 */ 1369 static int __init dmi_ignore_irq0_timer_override(const struct dmi_system_id *d) 1370 { 1371 if (!acpi_skip_timer_override) { 1372 pr_notice("%s detected: Ignoring BIOS IRQ0 override\n", 1373 d->ident); 1374 acpi_skip_timer_override = 1; 1375 } 1376 return 0; 1377 } 1378 1379 /* 1380 * ACPI offers an alternative platform interface model that removes 1381 * ACPI hardware requirements for platforms that do not implement 1382 * the PC Architecture. 1383 * 1384 * We initialize the Hardware-reduced ACPI model here: 1385 */ 1386 void __init acpi_generic_reduced_hw_init(void) 1387 { 1388 /* 1389 * Override x86_init functions and bypass legacy PIC in 1390 * hardware reduced ACPI mode. 1391 */ 1392 x86_init.timers.timer_init = x86_init_noop; 1393 x86_init.irqs.pre_vector_init = x86_init_noop; 1394 legacy_pic = &null_legacy_pic; 1395 } 1396 1397 static void __init acpi_reduced_hw_init(void) 1398 { 1399 if (acpi_gbl_reduced_hardware) 1400 x86_init.acpi.reduced_hw_early_init(); 1401 } 1402 1403 /* 1404 * If your system is blacklisted here, but you find that acpi=force 1405 * works for you, please contact linux-acpi@vger.kernel.org 1406 */ 1407 static const struct dmi_system_id acpi_dmi_table[] __initconst = { 1408 /* 1409 * Boxes that need ACPI disabled 1410 */ 1411 { 1412 .callback = dmi_disable_acpi, 1413 .ident = "IBM Thinkpad", 1414 .matches = { 1415 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), 1416 DMI_MATCH(DMI_BOARD_NAME, "2629H1G"), 1417 }, 1418 }, 1419 1420 /* 1421 * Boxes that need ACPI PCI IRQ routing disabled 1422 */ 1423 { 1424 .callback = disable_acpi_irq, 1425 .ident = "ASUS A7V", 1426 .matches = { 1427 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC"), 1428 DMI_MATCH(DMI_BOARD_NAME, "<A7V>"), 1429 /* newer BIOS, Revision 1011, does work */ 1430 DMI_MATCH(DMI_BIOS_VERSION, 1431 "ASUS A7V ACPI BIOS Revision 1007"), 1432 }, 1433 }, 1434 { 1435 /* 1436 * Latest BIOS for IBM 600E (1.16) has bad pcinum 1437 * for LPC bridge, which is needed for the PCI 1438 * interrupt links to work. DSDT fix is in bug 5966. 1439 * 2645, 2646 model numbers are shared with 600/600E/600X 1440 */ 1441 .callback = disable_acpi_irq, 1442 .ident = "IBM Thinkpad 600 Series 2645", 1443 .matches = { 1444 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), 1445 DMI_MATCH(DMI_BOARD_NAME, "2645"), 1446 }, 1447 }, 1448 { 1449 .callback = disable_acpi_irq, 1450 .ident = "IBM Thinkpad 600 Series 2646", 1451 .matches = { 1452 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), 1453 DMI_MATCH(DMI_BOARD_NAME, "2646"), 1454 }, 1455 }, 1456 /* 1457 * Boxes that need ACPI PCI IRQ routing and PCI scan disabled 1458 */ 1459 { /* _BBN 0 bug */ 1460 .callback = disable_acpi_pci, 1461 .ident = "ASUS PR-DLS", 1462 .matches = { 1463 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."), 1464 DMI_MATCH(DMI_BOARD_NAME, "PR-DLS"), 1465 DMI_MATCH(DMI_BIOS_VERSION, 1466 "ASUS PR-DLS ACPI BIOS Revision 1010"), 1467 DMI_MATCH(DMI_BIOS_DATE, "03/21/2003") 1468 }, 1469 }, 1470 { 1471 .callback = disable_acpi_pci, 1472 .ident = "Acer TravelMate 36x Laptop", 1473 .matches = { 1474 DMI_MATCH(DMI_SYS_VENDOR, "Acer"), 1475 DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"), 1476 }, 1477 }, 1478 {} 1479 }; 1480 1481 /* second table for DMI checks that should run after early-quirks */ 1482 static const struct dmi_system_id acpi_dmi_table_late[] __initconst = { 1483 /* 1484 * HP laptops which use a DSDT reporting as HP/SB400/10000, 1485 * which includes some code which overrides all temperature 1486 * trip points to 16C if the INTIN2 input of the I/O APIC 1487 * is enabled. This input is incorrectly designated the 1488 * ISA IRQ 0 via an interrupt source override even though 1489 * it is wired to the output of the master 8259A and INTIN0 1490 * is not connected at all. Force ignoring BIOS IRQ0 1491 * override in that cases. 1492 */ 1493 { 1494 .callback = dmi_ignore_irq0_timer_override, 1495 .ident = "HP nx6115 laptop", 1496 .matches = { 1497 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 1498 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6115"), 1499 }, 1500 }, 1501 { 1502 .callback = dmi_ignore_irq0_timer_override, 1503 .ident = "HP NX6125 laptop", 1504 .matches = { 1505 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 1506 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6125"), 1507 }, 1508 }, 1509 { 1510 .callback = dmi_ignore_irq0_timer_override, 1511 .ident = "HP NX6325 laptop", 1512 .matches = { 1513 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 1514 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6325"), 1515 }, 1516 }, 1517 { 1518 .callback = dmi_ignore_irq0_timer_override, 1519 .ident = "HP 6715b laptop", 1520 .matches = { 1521 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 1522 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq 6715b"), 1523 }, 1524 }, 1525 { 1526 .callback = dmi_ignore_irq0_timer_override, 1527 .ident = "FUJITSU SIEMENS", 1528 .matches = { 1529 DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"), 1530 DMI_MATCH(DMI_PRODUCT_NAME, "AMILO PRO V2030"), 1531 }, 1532 }, 1533 {} 1534 }; 1535 1536 /* 1537 * acpi_boot_table_init() and acpi_boot_init() 1538 * called from setup_arch(), always. 1539 * 1. checksums all tables 1540 * 2. enumerates lapics 1541 * 3. enumerates io-apics 1542 * 1543 * acpi_table_init() is separate to allow reading SRAT without 1544 * other side effects. 1545 * 1546 * side effects of acpi_boot_init: 1547 * acpi_lapic = 1 if LAPIC found 1548 * acpi_ioapic = 1 if IOAPIC found 1549 * if (acpi_lapic && acpi_ioapic) smp_found_config = 1; 1550 * if acpi_blacklisted() acpi_disabled = 1; 1551 * acpi_irq_model=... 1552 * ... 1553 */ 1554 1555 void __init acpi_boot_table_init(void) 1556 { 1557 dmi_check_system(acpi_dmi_table); 1558 1559 /* 1560 * If acpi_disabled, bail out 1561 */ 1562 if (acpi_disabled) 1563 return; 1564 1565 /* 1566 * Initialize the ACPI boot-time table parser. 1567 */ 1568 if (acpi_table_init()) { 1569 disable_acpi(); 1570 return; 1571 } 1572 1573 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf); 1574 1575 /* 1576 * blacklist may disable ACPI entirely 1577 */ 1578 if (acpi_blacklisted()) { 1579 if (acpi_force) { 1580 printk(KERN_WARNING PREFIX "acpi=force override\n"); 1581 } else { 1582 printk(KERN_WARNING PREFIX "Disabling ACPI support\n"); 1583 disable_acpi(); 1584 return; 1585 } 1586 } 1587 } 1588 1589 int __init early_acpi_boot_init(void) 1590 { 1591 /* 1592 * If acpi_disabled, bail out 1593 */ 1594 if (acpi_disabled) 1595 return 1; 1596 1597 /* 1598 * Process the Multiple APIC Description Table (MADT), if present 1599 */ 1600 early_acpi_process_madt(); 1601 1602 /* 1603 * Hardware-reduced ACPI mode initialization: 1604 */ 1605 acpi_reduced_hw_init(); 1606 1607 return 0; 1608 } 1609 1610 int __init acpi_boot_init(void) 1611 { 1612 /* those are executed after early-quirks are executed */ 1613 dmi_check_system(acpi_dmi_table_late); 1614 1615 /* 1616 * If acpi_disabled, bail out 1617 */ 1618 if (acpi_disabled) 1619 return 1; 1620 1621 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf); 1622 1623 /* 1624 * set sci_int and PM timer address 1625 */ 1626 acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt); 1627 1628 /* 1629 * Process the Multiple APIC Description Table (MADT), if present 1630 */ 1631 acpi_process_madt(); 1632 1633 acpi_table_parse(ACPI_SIG_HPET, acpi_parse_hpet); 1634 if (IS_ENABLED(CONFIG_ACPI_BGRT)) 1635 acpi_table_parse(ACPI_SIG_BGRT, acpi_parse_bgrt); 1636 1637 if (!acpi_noirq) 1638 x86_init.pci.init = pci_acpi_init; 1639 1640 /* Do not enable ACPI SPCR console by default */ 1641 acpi_parse_spcr(earlycon_acpi_spcr_enable, false); 1642 return 0; 1643 } 1644 1645 static int __init parse_acpi(char *arg) 1646 { 1647 if (!arg) 1648 return -EINVAL; 1649 1650 /* "acpi=off" disables both ACPI table parsing and interpreter */ 1651 if (strcmp(arg, "off") == 0) { 1652 disable_acpi(); 1653 } 1654 /* acpi=force to over-ride black-list */ 1655 else if (strcmp(arg, "force") == 0) { 1656 acpi_force = 1; 1657 acpi_disabled = 0; 1658 } 1659 /* acpi=strict disables out-of-spec workarounds */ 1660 else if (strcmp(arg, "strict") == 0) { 1661 acpi_strict = 1; 1662 } 1663 /* acpi=rsdt use RSDT instead of XSDT */ 1664 else if (strcmp(arg, "rsdt") == 0) { 1665 acpi_gbl_do_not_use_xsdt = TRUE; 1666 } 1667 /* "acpi=noirq" disables ACPI interrupt routing */ 1668 else if (strcmp(arg, "noirq") == 0) { 1669 acpi_noirq_set(); 1670 } 1671 /* "acpi=copy_dsdt" copys DSDT */ 1672 else if (strcmp(arg, "copy_dsdt") == 0) { 1673 acpi_gbl_copy_dsdt_locally = 1; 1674 } 1675 /* "acpi=nocmcff" disables FF mode for corrected errors */ 1676 else if (strcmp(arg, "nocmcff") == 0) { 1677 acpi_disable_cmcff = 1; 1678 } else { 1679 /* Core will printk when we return error. */ 1680 return -EINVAL; 1681 } 1682 return 0; 1683 } 1684 early_param("acpi", parse_acpi); 1685 1686 /* FIXME: Using pci= for an ACPI parameter is a travesty. */ 1687 static int __init parse_pci(char *arg) 1688 { 1689 if (arg && strcmp(arg, "noacpi") == 0) 1690 acpi_disable_pci(); 1691 return 0; 1692 } 1693 early_param("pci", parse_pci); 1694 1695 int __init acpi_mps_check(void) 1696 { 1697 #if defined(CONFIG_X86_LOCAL_APIC) && !defined(CONFIG_X86_MPPARSE) 1698 /* mptable code is not built-in*/ 1699 if (acpi_disabled || acpi_noirq) { 1700 printk(KERN_WARNING "MPS support code is not built-in.\n" 1701 "Using acpi=off or acpi=noirq or pci=noacpi " 1702 "may have problem\n"); 1703 return 1; 1704 } 1705 #endif 1706 return 0; 1707 } 1708 1709 #ifdef CONFIG_X86_IO_APIC 1710 static int __init parse_acpi_skip_timer_override(char *arg) 1711 { 1712 acpi_skip_timer_override = 1; 1713 return 0; 1714 } 1715 early_param("acpi_skip_timer_override", parse_acpi_skip_timer_override); 1716 1717 static int __init parse_acpi_use_timer_override(char *arg) 1718 { 1719 acpi_use_timer_override = 1; 1720 return 0; 1721 } 1722 early_param("acpi_use_timer_override", parse_acpi_use_timer_override); 1723 #endif /* CONFIG_X86_IO_APIC */ 1724 1725 static int __init setup_acpi_sci(char *s) 1726 { 1727 if (!s) 1728 return -EINVAL; 1729 if (!strcmp(s, "edge")) 1730 acpi_sci_flags = ACPI_MADT_TRIGGER_EDGE | 1731 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK); 1732 else if (!strcmp(s, "level")) 1733 acpi_sci_flags = ACPI_MADT_TRIGGER_LEVEL | 1734 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK); 1735 else if (!strcmp(s, "high")) 1736 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_HIGH | 1737 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK); 1738 else if (!strcmp(s, "low")) 1739 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_LOW | 1740 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK); 1741 else 1742 return -EINVAL; 1743 return 0; 1744 } 1745 early_param("acpi_sci", setup_acpi_sci); 1746 1747 int __acpi_acquire_global_lock(unsigned int *lock) 1748 { 1749 unsigned int old, new, val; 1750 do { 1751 old = *lock; 1752 new = (((old & ~0x3) + 2) + ((old >> 1) & 0x1)); 1753 val = cmpxchg(lock, old, new); 1754 } while (unlikely (val != old)); 1755 return (new < 3) ? -1 : 0; 1756 } 1757 1758 int __acpi_release_global_lock(unsigned int *lock) 1759 { 1760 unsigned int old, new, val; 1761 do { 1762 old = *lock; 1763 new = old & ~0x3; 1764 val = cmpxchg(lock, old, new); 1765 } while (unlikely (val != old)); 1766 return old & 0x1; 1767 } 1768 1769 void __init arch_reserve_mem_area(acpi_physical_address addr, size_t size) 1770 { 1771 e820__range_add(addr, size, E820_TYPE_ACPI); 1772 e820__update_table_print(); 1773 } 1774