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/memblock.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 #include <asm/setup.h> 52 53 #include "sleep.h" /* To include x86_acpi_suspend_lowlevel */ 54 static int __initdata acpi_force = 0; 55 int acpi_disabled; 56 EXPORT_SYMBOL(acpi_disabled); 57 58 #ifdef CONFIG_X86_64 59 # include <asm/proto.h> 60 #endif /* X86 */ 61 62 #define PREFIX "ACPI: " 63 64 int acpi_noirq; /* skip ACPI IRQ initialization */ 65 int acpi_pci_disabled; /* skip ACPI PCI scan and IRQ initialization */ 66 EXPORT_SYMBOL(acpi_pci_disabled); 67 68 int acpi_lapic; 69 int acpi_ioapic; 70 int acpi_strict; 71 int acpi_disable_cmcff; 72 73 /* ACPI SCI override configuration */ 74 u8 acpi_sci_flags __initdata; 75 u32 acpi_sci_override_gsi __initdata = INVALID_ACPI_IRQ; 76 int acpi_skip_timer_override __initdata; 77 int acpi_use_timer_override __initdata; 78 int acpi_fix_pin2_polarity __initdata; 79 80 #ifdef CONFIG_X86_LOCAL_APIC 81 static u64 acpi_lapic_addr __initdata = APIC_DEFAULT_PHYS_BASE; 82 #endif 83 84 #ifdef CONFIG_X86_IO_APIC 85 /* 86 * Locks related to IOAPIC hotplug 87 * Hotplug side: 88 * ->device_hotplug_lock 89 * ->acpi_ioapic_lock 90 * ->ioapic_lock 91 * Interrupt mapping side: 92 * ->acpi_ioapic_lock 93 * ->ioapic_mutex 94 * ->ioapic_lock 95 */ 96 static DEFINE_MUTEX(acpi_ioapic_lock); 97 #endif 98 99 /* -------------------------------------------------------------------------- 100 Boot-time Configuration 101 -------------------------------------------------------------------------- */ 102 103 /* 104 * The default interrupt routing model is PIC (8259). This gets 105 * overridden if IOAPICs are enumerated (below). 106 */ 107 enum acpi_irq_model_id acpi_irq_model = ACPI_IRQ_MODEL_PIC; 108 109 110 /* 111 * ISA irqs by default are the first 16 gsis but can be 112 * any gsi as specified by an interrupt source override. 113 */ 114 static u32 isa_irq_to_gsi[NR_IRQS_LEGACY] __read_mostly = { 115 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 116 }; 117 118 /* 119 * This is just a simple wrapper around early_memremap(), 120 * with sanity checks for phys == 0 and size == 0. 121 */ 122 void __init __iomem *__acpi_map_table(unsigned long phys, unsigned long size) 123 { 124 125 if (!phys || !size) 126 return NULL; 127 128 return early_memremap(phys, size); 129 } 130 131 void __init __acpi_unmap_table(void __iomem *map, unsigned long size) 132 { 133 if (!map || !size) 134 return; 135 136 early_memunmap(map, size); 137 } 138 139 #ifdef CONFIG_X86_LOCAL_APIC 140 static int __init acpi_parse_madt(struct acpi_table_header *table) 141 { 142 struct acpi_table_madt *madt = NULL; 143 144 if (!boot_cpu_has(X86_FEATURE_APIC)) 145 return -EINVAL; 146 147 madt = (struct acpi_table_madt *)table; 148 if (!madt) { 149 printk(KERN_WARNING PREFIX "Unable to map MADT\n"); 150 return -ENODEV; 151 } 152 153 if (madt->address) { 154 acpi_lapic_addr = (u64) madt->address; 155 156 printk(KERN_DEBUG PREFIX "Local APIC address 0x%08x\n", 157 madt->address); 158 } 159 160 default_acpi_madt_oem_check(madt->header.oem_id, 161 madt->header.oem_table_id); 162 163 return 0; 164 } 165 166 /** 167 * acpi_register_lapic - register a local apic and generates a logic cpu number 168 * @id: local apic id to register 169 * @acpiid: ACPI id to register 170 * @enabled: this cpu is enabled or not 171 * 172 * Returns the logic cpu number which maps to the local apic 173 */ 174 static int acpi_register_lapic(int id, u32 acpiid, u8 enabled) 175 { 176 unsigned int ver = 0; 177 int cpu; 178 179 if (id >= MAX_LOCAL_APIC) { 180 printk(KERN_INFO PREFIX "skipped apicid that is too big\n"); 181 return -EINVAL; 182 } 183 184 if (!enabled) { 185 ++disabled_cpus; 186 return -EINVAL; 187 } 188 189 if (boot_cpu_physical_apicid != -1U) 190 ver = boot_cpu_apic_version; 191 192 cpu = generic_processor_info(id, ver); 193 if (cpu >= 0) 194 early_per_cpu(x86_cpu_to_acpiid, cpu) = acpiid; 195 196 return cpu; 197 } 198 199 static int __init 200 acpi_parse_x2apic(struct acpi_subtable_header *header, const unsigned long end) 201 { 202 struct acpi_madt_local_x2apic *processor = NULL; 203 #ifdef CONFIG_X86_X2APIC 204 u32 apic_id; 205 u8 enabled; 206 #endif 207 208 processor = (struct acpi_madt_local_x2apic *)header; 209 210 if (BAD_MADT_ENTRY(processor, end)) 211 return -EINVAL; 212 213 acpi_table_print_madt_entry(header); 214 215 #ifdef CONFIG_X86_X2APIC 216 apic_id = processor->local_apic_id; 217 enabled = processor->lapic_flags & ACPI_MADT_ENABLED; 218 219 /* Ignore invalid ID */ 220 if (apic_id == 0xffffffff) 221 return 0; 222 223 /* 224 * We need to register disabled CPU as well to permit 225 * counting disabled CPUs. This allows us to size 226 * cpus_possible_map more accurately, to permit 227 * to not preallocating memory for all NR_CPUS 228 * when we use CPU hotplug. 229 */ 230 if (!apic->apic_id_valid(apic_id)) { 231 if (enabled) 232 pr_warn(PREFIX "x2apic entry ignored\n"); 233 return 0; 234 } 235 236 acpi_register_lapic(apic_id, processor->uid, enabled); 237 #else 238 printk(KERN_WARNING PREFIX "x2apic entry ignored\n"); 239 #endif 240 241 return 0; 242 } 243 244 static int __init 245 acpi_parse_lapic(struct acpi_subtable_header * header, const unsigned long end) 246 { 247 struct acpi_madt_local_apic *processor = NULL; 248 249 processor = (struct acpi_madt_local_apic *)header; 250 251 if (BAD_MADT_ENTRY(processor, end)) 252 return -EINVAL; 253 254 acpi_table_print_madt_entry(header); 255 256 /* Ignore invalid ID */ 257 if (processor->id == 0xff) 258 return 0; 259 260 /* 261 * We need to register disabled CPU as well to permit 262 * counting disabled CPUs. This allows us to size 263 * cpus_possible_map more accurately, to permit 264 * to not preallocating memory for all NR_CPUS 265 * when we use CPU hotplug. 266 */ 267 acpi_register_lapic(processor->id, /* APIC ID */ 268 processor->processor_id, /* ACPI ID */ 269 processor->lapic_flags & ACPI_MADT_ENABLED); 270 271 return 0; 272 } 273 274 static int __init 275 acpi_parse_sapic(struct acpi_subtable_header *header, const unsigned long end) 276 { 277 struct acpi_madt_local_sapic *processor = NULL; 278 279 processor = (struct acpi_madt_local_sapic *)header; 280 281 if (BAD_MADT_ENTRY(processor, end)) 282 return -EINVAL; 283 284 acpi_table_print_madt_entry(header); 285 286 acpi_register_lapic((processor->id << 8) | processor->eid,/* APIC ID */ 287 processor->processor_id, /* ACPI ID */ 288 processor->lapic_flags & ACPI_MADT_ENABLED); 289 290 return 0; 291 } 292 293 static int __init 294 acpi_parse_lapic_addr_ovr(struct acpi_subtable_header * header, 295 const unsigned long end) 296 { 297 struct acpi_madt_local_apic_override *lapic_addr_ovr = NULL; 298 299 lapic_addr_ovr = (struct acpi_madt_local_apic_override *)header; 300 301 if (BAD_MADT_ENTRY(lapic_addr_ovr, end)) 302 return -EINVAL; 303 304 acpi_table_print_madt_entry(header); 305 306 acpi_lapic_addr = lapic_addr_ovr->address; 307 308 return 0; 309 } 310 311 static int __init 312 acpi_parse_x2apic_nmi(struct acpi_subtable_header *header, 313 const unsigned long end) 314 { 315 struct acpi_madt_local_x2apic_nmi *x2apic_nmi = NULL; 316 317 x2apic_nmi = (struct acpi_madt_local_x2apic_nmi *)header; 318 319 if (BAD_MADT_ENTRY(x2apic_nmi, end)) 320 return -EINVAL; 321 322 acpi_table_print_madt_entry(header); 323 324 if (x2apic_nmi->lint != 1) 325 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n"); 326 327 return 0; 328 } 329 330 static int __init 331 acpi_parse_lapic_nmi(struct acpi_subtable_header * header, const unsigned long end) 332 { 333 struct acpi_madt_local_apic_nmi *lapic_nmi = NULL; 334 335 lapic_nmi = (struct acpi_madt_local_apic_nmi *)header; 336 337 if (BAD_MADT_ENTRY(lapic_nmi, end)) 338 return -EINVAL; 339 340 acpi_table_print_madt_entry(header); 341 342 if (lapic_nmi->lint != 1) 343 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n"); 344 345 return 0; 346 } 347 348 #endif /*CONFIG_X86_LOCAL_APIC */ 349 350 #ifdef CONFIG_X86_IO_APIC 351 #define MP_ISA_BUS 0 352 353 static int __init mp_register_ioapic_irq(u8 bus_irq, u8 polarity, 354 u8 trigger, u32 gsi); 355 356 static void __init mp_override_legacy_irq(u8 bus_irq, u8 polarity, u8 trigger, 357 u32 gsi) 358 { 359 /* 360 * Check bus_irq boundary. 361 */ 362 if (bus_irq >= NR_IRQS_LEGACY) { 363 pr_warn("Invalid bus_irq %u for legacy override\n", bus_irq); 364 return; 365 } 366 367 /* 368 * TBD: This check is for faulty timer entries, where the override 369 * erroneously sets the trigger to level, resulting in a HUGE 370 * increase of timer interrupts! 371 */ 372 if ((bus_irq == 0) && (trigger == 3)) 373 trigger = 1; 374 375 if (mp_register_ioapic_irq(bus_irq, polarity, trigger, gsi) < 0) 376 return; 377 /* 378 * Reset default identity mapping if gsi is also an legacy IRQ, 379 * otherwise there will be more than one entry with the same GSI 380 * and acpi_isa_irq_to_gsi() may give wrong result. 381 */ 382 if (gsi < nr_legacy_irqs() && isa_irq_to_gsi[gsi] == gsi) 383 isa_irq_to_gsi[gsi] = INVALID_ACPI_IRQ; 384 isa_irq_to_gsi[bus_irq] = gsi; 385 } 386 387 static int mp_config_acpi_gsi(struct device *dev, u32 gsi, int trigger, 388 int polarity) 389 { 390 #ifdef CONFIG_X86_MPPARSE 391 struct mpc_intsrc mp_irq; 392 struct pci_dev *pdev; 393 unsigned char number; 394 unsigned int devfn; 395 int ioapic; 396 u8 pin; 397 398 if (!acpi_ioapic) 399 return 0; 400 if (!dev || !dev_is_pci(dev)) 401 return 0; 402 403 pdev = to_pci_dev(dev); 404 number = pdev->bus->number; 405 devfn = pdev->devfn; 406 pin = pdev->pin; 407 /* print the entry should happen on mptable identically */ 408 mp_irq.type = MP_INTSRC; 409 mp_irq.irqtype = mp_INT; 410 mp_irq.irqflag = (trigger == ACPI_EDGE_SENSITIVE ? 4 : 0x0c) | 411 (polarity == ACPI_ACTIVE_HIGH ? 1 : 3); 412 mp_irq.srcbus = number; 413 mp_irq.srcbusirq = (((devfn >> 3) & 0x1f) << 2) | ((pin - 1) & 3); 414 ioapic = mp_find_ioapic(gsi); 415 mp_irq.dstapic = mpc_ioapic_id(ioapic); 416 mp_irq.dstirq = mp_find_ioapic_pin(ioapic, gsi); 417 418 mp_save_irq(&mp_irq); 419 #endif 420 return 0; 421 } 422 423 static int __init mp_register_ioapic_irq(u8 bus_irq, u8 polarity, 424 u8 trigger, u32 gsi) 425 { 426 struct mpc_intsrc mp_irq; 427 int ioapic, pin; 428 429 /* Convert 'gsi' to 'ioapic.pin'(INTIN#) */ 430 ioapic = mp_find_ioapic(gsi); 431 if (ioapic < 0) { 432 pr_warn("Failed to find ioapic for gsi : %u\n", gsi); 433 return ioapic; 434 } 435 436 pin = mp_find_ioapic_pin(ioapic, gsi); 437 438 mp_irq.type = MP_INTSRC; 439 mp_irq.irqtype = mp_INT; 440 mp_irq.irqflag = (trigger << 2) | polarity; 441 mp_irq.srcbus = MP_ISA_BUS; 442 mp_irq.srcbusirq = bus_irq; 443 mp_irq.dstapic = mpc_ioapic_id(ioapic); 444 mp_irq.dstirq = pin; 445 446 mp_save_irq(&mp_irq); 447 448 return 0; 449 } 450 451 static int __init 452 acpi_parse_ioapic(struct acpi_subtable_header * header, const unsigned long end) 453 { 454 struct acpi_madt_io_apic *ioapic = NULL; 455 struct ioapic_domain_cfg cfg = { 456 .type = IOAPIC_DOMAIN_DYNAMIC, 457 .ops = &mp_ioapic_irqdomain_ops, 458 }; 459 460 ioapic = (struct acpi_madt_io_apic *)header; 461 462 if (BAD_MADT_ENTRY(ioapic, end)) 463 return -EINVAL; 464 465 acpi_table_print_madt_entry(header); 466 467 /* Statically assign IRQ numbers for IOAPICs hosting legacy IRQs */ 468 if (ioapic->global_irq_base < nr_legacy_irqs()) 469 cfg.type = IOAPIC_DOMAIN_LEGACY; 470 471 mp_register_ioapic(ioapic->id, ioapic->address, ioapic->global_irq_base, 472 &cfg); 473 474 return 0; 475 } 476 477 /* 478 * Parse Interrupt Source Override for the ACPI SCI 479 */ 480 static void __init acpi_sci_ioapic_setup(u8 bus_irq, u16 polarity, u16 trigger, u32 gsi) 481 { 482 if (trigger == 0) /* compatible SCI trigger is level */ 483 trigger = 3; 484 485 if (polarity == 0) /* compatible SCI polarity is low */ 486 polarity = 3; 487 488 /* Command-line over-ride via acpi_sci= */ 489 if (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) 490 trigger = (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2; 491 492 if (acpi_sci_flags & ACPI_MADT_POLARITY_MASK) 493 polarity = acpi_sci_flags & ACPI_MADT_POLARITY_MASK; 494 495 if (bus_irq < NR_IRQS_LEGACY) 496 mp_override_legacy_irq(bus_irq, polarity, trigger, gsi); 497 else 498 mp_register_ioapic_irq(bus_irq, polarity, trigger, gsi); 499 500 acpi_penalize_sci_irq(bus_irq, trigger, polarity); 501 502 /* 503 * stash over-ride to indicate we've been here 504 * and for later update of acpi_gbl_FADT 505 */ 506 acpi_sci_override_gsi = gsi; 507 return; 508 } 509 510 static int __init 511 acpi_parse_int_src_ovr(struct acpi_subtable_header * header, 512 const unsigned long end) 513 { 514 struct acpi_madt_interrupt_override *intsrc = NULL; 515 516 intsrc = (struct acpi_madt_interrupt_override *)header; 517 518 if (BAD_MADT_ENTRY(intsrc, end)) 519 return -EINVAL; 520 521 acpi_table_print_madt_entry(header); 522 523 if (intsrc->source_irq == acpi_gbl_FADT.sci_interrupt) { 524 acpi_sci_ioapic_setup(intsrc->source_irq, 525 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK, 526 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2, 527 intsrc->global_irq); 528 return 0; 529 } 530 531 if (intsrc->source_irq == 0) { 532 if (acpi_skip_timer_override) { 533 printk(PREFIX "BIOS IRQ0 override ignored.\n"); 534 return 0; 535 } 536 537 if ((intsrc->global_irq == 2) && acpi_fix_pin2_polarity 538 && (intsrc->inti_flags & ACPI_MADT_POLARITY_MASK)) { 539 intsrc->inti_flags &= ~ACPI_MADT_POLARITY_MASK; 540 printk(PREFIX "BIOS IRQ0 pin2 override: forcing polarity to high active.\n"); 541 } 542 } 543 544 mp_override_legacy_irq(intsrc->source_irq, 545 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK, 546 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2, 547 intsrc->global_irq); 548 549 return 0; 550 } 551 552 static int __init 553 acpi_parse_nmi_src(struct acpi_subtable_header * header, const unsigned long end) 554 { 555 struct acpi_madt_nmi_source *nmi_src = NULL; 556 557 nmi_src = (struct acpi_madt_nmi_source *)header; 558 559 if (BAD_MADT_ENTRY(nmi_src, end)) 560 return -EINVAL; 561 562 acpi_table_print_madt_entry(header); 563 564 /* TBD: Support nimsrc entries? */ 565 566 return 0; 567 } 568 569 #endif /* CONFIG_X86_IO_APIC */ 570 571 /* 572 * acpi_pic_sci_set_trigger() 573 * 574 * use ELCR to set PIC-mode trigger type for SCI 575 * 576 * If a PIC-mode SCI is not recognized or gives spurious IRQ7's 577 * it may require Edge Trigger -- use "acpi_sci=edge" 578 * 579 * Port 0x4d0-4d1 are ECLR1 and ECLR2, the Edge/Level Control Registers 580 * for the 8259 PIC. bit[n] = 1 means irq[n] is Level, otherwise Edge. 581 * ECLR1 is IRQs 0-7 (IRQ 0, 1, 2 must be 0) 582 * ECLR2 is IRQs 8-15 (IRQ 8, 13 must be 0) 583 */ 584 585 void __init acpi_pic_sci_set_trigger(unsigned int irq, u16 trigger) 586 { 587 unsigned int mask = 1 << irq; 588 unsigned int old, new; 589 590 /* Real old ELCR mask */ 591 old = inb(0x4d0) | (inb(0x4d1) << 8); 592 593 /* 594 * If we use ACPI to set PCI IRQs, then we should clear ELCR 595 * since we will set it correctly as we enable the PCI irq 596 * routing. 597 */ 598 new = acpi_noirq ? old : 0; 599 600 /* 601 * Update SCI information in the ELCR, it isn't in the PCI 602 * routing tables.. 603 */ 604 switch (trigger) { 605 case 1: /* Edge - clear */ 606 new &= ~mask; 607 break; 608 case 3: /* Level - set */ 609 new |= mask; 610 break; 611 } 612 613 if (old == new) 614 return; 615 616 printk(PREFIX "setting ELCR to %04x (from %04x)\n", new, old); 617 outb(new, 0x4d0); 618 outb(new >> 8, 0x4d1); 619 } 620 621 int acpi_gsi_to_irq(u32 gsi, unsigned int *irqp) 622 { 623 int rc, irq, trigger, polarity; 624 625 if (acpi_irq_model == ACPI_IRQ_MODEL_PIC) { 626 *irqp = gsi; 627 return 0; 628 } 629 630 rc = acpi_get_override_irq(gsi, &trigger, &polarity); 631 if (rc) 632 return rc; 633 634 trigger = trigger ? ACPI_LEVEL_SENSITIVE : ACPI_EDGE_SENSITIVE; 635 polarity = polarity ? ACPI_ACTIVE_LOW : ACPI_ACTIVE_HIGH; 636 irq = acpi_register_gsi(NULL, gsi, trigger, polarity); 637 if (irq < 0) 638 return irq; 639 640 *irqp = irq; 641 return 0; 642 } 643 EXPORT_SYMBOL_GPL(acpi_gsi_to_irq); 644 645 int acpi_isa_irq_to_gsi(unsigned isa_irq, u32 *gsi) 646 { 647 if (isa_irq < nr_legacy_irqs() && 648 isa_irq_to_gsi[isa_irq] != INVALID_ACPI_IRQ) { 649 *gsi = isa_irq_to_gsi[isa_irq]; 650 return 0; 651 } 652 653 return -1; 654 } 655 656 static int acpi_register_gsi_pic(struct device *dev, u32 gsi, 657 int trigger, int polarity) 658 { 659 #ifdef CONFIG_PCI 660 /* 661 * Make sure all (legacy) PCI IRQs are set as level-triggered. 662 */ 663 if (trigger == ACPI_LEVEL_SENSITIVE) 664 elcr_set_level_irq(gsi); 665 #endif 666 667 return gsi; 668 } 669 670 #ifdef CONFIG_X86_LOCAL_APIC 671 static int acpi_register_gsi_ioapic(struct device *dev, u32 gsi, 672 int trigger, int polarity) 673 { 674 int irq = gsi; 675 #ifdef CONFIG_X86_IO_APIC 676 int node; 677 struct irq_alloc_info info; 678 679 node = dev ? dev_to_node(dev) : NUMA_NO_NODE; 680 trigger = trigger == ACPI_EDGE_SENSITIVE ? 0 : 1; 681 polarity = polarity == ACPI_ACTIVE_HIGH ? 0 : 1; 682 ioapic_set_alloc_attr(&info, node, trigger, polarity); 683 684 mutex_lock(&acpi_ioapic_lock); 685 irq = mp_map_gsi_to_irq(gsi, IOAPIC_MAP_ALLOC, &info); 686 /* Don't set up the ACPI SCI because it's already set up */ 687 if (irq >= 0 && enable_update_mptable && gsi != acpi_gbl_FADT.sci_interrupt) 688 mp_config_acpi_gsi(dev, gsi, trigger, polarity); 689 mutex_unlock(&acpi_ioapic_lock); 690 #endif 691 692 return irq; 693 } 694 695 static void acpi_unregister_gsi_ioapic(u32 gsi) 696 { 697 #ifdef CONFIG_X86_IO_APIC 698 int irq; 699 700 mutex_lock(&acpi_ioapic_lock); 701 irq = mp_map_gsi_to_irq(gsi, 0, NULL); 702 if (irq > 0) 703 mp_unmap_irq(irq); 704 mutex_unlock(&acpi_ioapic_lock); 705 #endif 706 } 707 #endif 708 709 int (*__acpi_register_gsi)(struct device *dev, u32 gsi, 710 int trigger, int polarity) = acpi_register_gsi_pic; 711 void (*__acpi_unregister_gsi)(u32 gsi) = NULL; 712 713 #ifdef CONFIG_ACPI_SLEEP 714 int (*acpi_suspend_lowlevel)(void) = x86_acpi_suspend_lowlevel; 715 #else 716 int (*acpi_suspend_lowlevel)(void); 717 #endif 718 719 /* 720 * success: return IRQ number (>=0) 721 * failure: return < 0 722 */ 723 int acpi_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity) 724 { 725 return __acpi_register_gsi(dev, gsi, trigger, polarity); 726 } 727 EXPORT_SYMBOL_GPL(acpi_register_gsi); 728 729 void acpi_unregister_gsi(u32 gsi) 730 { 731 if (__acpi_unregister_gsi) 732 __acpi_unregister_gsi(gsi); 733 } 734 EXPORT_SYMBOL_GPL(acpi_unregister_gsi); 735 736 #ifdef CONFIG_X86_LOCAL_APIC 737 static void __init acpi_set_irq_model_ioapic(void) 738 { 739 acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC; 740 __acpi_register_gsi = acpi_register_gsi_ioapic; 741 __acpi_unregister_gsi = acpi_unregister_gsi_ioapic; 742 acpi_ioapic = 1; 743 } 744 #endif 745 746 /* 747 * ACPI based hotplug support for CPU 748 */ 749 #ifdef CONFIG_ACPI_HOTPLUG_CPU 750 #include <acpi/processor.h> 751 752 static int acpi_map_cpu2node(acpi_handle handle, int cpu, int physid) 753 { 754 #ifdef CONFIG_ACPI_NUMA 755 int nid; 756 757 nid = acpi_get_node(handle); 758 if (nid != NUMA_NO_NODE) { 759 set_apicid_to_node(physid, nid); 760 numa_set_node(cpu, nid); 761 } 762 #endif 763 return 0; 764 } 765 766 int acpi_map_cpu(acpi_handle handle, phys_cpuid_t physid, u32 acpi_id, 767 int *pcpu) 768 { 769 int cpu; 770 771 cpu = acpi_register_lapic(physid, acpi_id, ACPI_MADT_ENABLED); 772 if (cpu < 0) { 773 pr_info(PREFIX "Unable to map lapic to logical cpu number\n"); 774 return cpu; 775 } 776 777 acpi_processor_set_pdc(handle); 778 acpi_map_cpu2node(handle, cpu, physid); 779 780 *pcpu = cpu; 781 return 0; 782 } 783 EXPORT_SYMBOL(acpi_map_cpu); 784 785 int acpi_unmap_cpu(int cpu) 786 { 787 #ifdef CONFIG_ACPI_NUMA 788 set_apicid_to_node(per_cpu(x86_cpu_to_apicid, cpu), NUMA_NO_NODE); 789 #endif 790 791 per_cpu(x86_cpu_to_apicid, cpu) = -1; 792 set_cpu_present(cpu, false); 793 num_processors--; 794 795 return (0); 796 } 797 EXPORT_SYMBOL(acpi_unmap_cpu); 798 #endif /* CONFIG_ACPI_HOTPLUG_CPU */ 799 800 int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base) 801 { 802 int ret = -ENOSYS; 803 #ifdef CONFIG_ACPI_HOTPLUG_IOAPIC 804 int ioapic_id; 805 u64 addr; 806 struct ioapic_domain_cfg cfg = { 807 .type = IOAPIC_DOMAIN_DYNAMIC, 808 .ops = &mp_ioapic_irqdomain_ops, 809 }; 810 811 ioapic_id = acpi_get_ioapic_id(handle, gsi_base, &addr); 812 if (ioapic_id < 0) { 813 unsigned long long uid; 814 acpi_status status; 815 816 status = acpi_evaluate_integer(handle, METHOD_NAME__UID, 817 NULL, &uid); 818 if (ACPI_FAILURE(status)) { 819 acpi_handle_warn(handle, "failed to get IOAPIC ID.\n"); 820 return -EINVAL; 821 } 822 ioapic_id = (int)uid; 823 } 824 825 mutex_lock(&acpi_ioapic_lock); 826 ret = mp_register_ioapic(ioapic_id, phys_addr, gsi_base, &cfg); 827 mutex_unlock(&acpi_ioapic_lock); 828 #endif 829 830 return ret; 831 } 832 EXPORT_SYMBOL(acpi_register_ioapic); 833 834 int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base) 835 { 836 int ret = -ENOSYS; 837 838 #ifdef CONFIG_ACPI_HOTPLUG_IOAPIC 839 mutex_lock(&acpi_ioapic_lock); 840 ret = mp_unregister_ioapic(gsi_base); 841 mutex_unlock(&acpi_ioapic_lock); 842 #endif 843 844 return ret; 845 } 846 EXPORT_SYMBOL(acpi_unregister_ioapic); 847 848 /** 849 * acpi_ioapic_registered - Check whether IOAPIC assoicatied with @gsi_base 850 * has been registered 851 * @handle: ACPI handle of the IOAPIC device 852 * @gsi_base: GSI base associated with the IOAPIC 853 * 854 * Assume caller holds some type of lock to serialize acpi_ioapic_registered() 855 * with acpi_register_ioapic()/acpi_unregister_ioapic(). 856 */ 857 int acpi_ioapic_registered(acpi_handle handle, u32 gsi_base) 858 { 859 int ret = 0; 860 861 #ifdef CONFIG_ACPI_HOTPLUG_IOAPIC 862 mutex_lock(&acpi_ioapic_lock); 863 ret = mp_ioapic_registered(gsi_base); 864 mutex_unlock(&acpi_ioapic_lock); 865 #endif 866 867 return ret; 868 } 869 870 static int __init acpi_parse_sbf(struct acpi_table_header *table) 871 { 872 struct acpi_table_boot *sb = (struct acpi_table_boot *)table; 873 874 sbf_port = sb->cmos_index; /* Save CMOS port */ 875 876 return 0; 877 } 878 879 #ifdef CONFIG_HPET_TIMER 880 #include <asm/hpet.h> 881 882 static struct resource *hpet_res __initdata; 883 884 static int __init acpi_parse_hpet(struct acpi_table_header *table) 885 { 886 struct acpi_table_hpet *hpet_tbl = (struct acpi_table_hpet *)table; 887 888 if (hpet_tbl->address.space_id != ACPI_SPACE_MEM) { 889 printk(KERN_WARNING PREFIX "HPET timers must be located in " 890 "memory.\n"); 891 return -1; 892 } 893 894 hpet_address = hpet_tbl->address.address; 895 hpet_blockid = hpet_tbl->sequence; 896 897 /* 898 * Some broken BIOSes advertise HPET at 0x0. We really do not 899 * want to allocate a resource there. 900 */ 901 if (!hpet_address) { 902 printk(KERN_WARNING PREFIX 903 "HPET id: %#x base: %#lx is invalid\n", 904 hpet_tbl->id, hpet_address); 905 return 0; 906 } 907 #ifdef CONFIG_X86_64 908 /* 909 * Some even more broken BIOSes advertise HPET at 910 * 0xfed0000000000000 instead of 0xfed00000. Fix it up and add 911 * some noise: 912 */ 913 if (hpet_address == 0xfed0000000000000UL) { 914 if (!hpet_force_user) { 915 printk(KERN_WARNING PREFIX "HPET id: %#x " 916 "base: 0xfed0000000000000 is bogus\n " 917 "try hpet=force on the kernel command line to " 918 "fix it up to 0xfed00000.\n", hpet_tbl->id); 919 hpet_address = 0; 920 return 0; 921 } 922 printk(KERN_WARNING PREFIX 923 "HPET id: %#x base: 0xfed0000000000000 fixed up " 924 "to 0xfed00000.\n", hpet_tbl->id); 925 hpet_address >>= 32; 926 } 927 #endif 928 printk(KERN_INFO PREFIX "HPET id: %#x base: %#lx\n", 929 hpet_tbl->id, hpet_address); 930 931 /* 932 * Allocate and initialize the HPET firmware resource for adding into 933 * the resource tree during the lateinit timeframe. 934 */ 935 #define HPET_RESOURCE_NAME_SIZE 9 936 hpet_res = memblock_alloc(sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE, 937 SMP_CACHE_BYTES); 938 if (!hpet_res) 939 panic("%s: Failed to allocate %zu bytes\n", __func__, 940 sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE); 941 942 hpet_res->name = (void *)&hpet_res[1]; 943 hpet_res->flags = IORESOURCE_MEM; 944 snprintf((char *)hpet_res->name, HPET_RESOURCE_NAME_SIZE, "HPET %u", 945 hpet_tbl->sequence); 946 947 hpet_res->start = hpet_address; 948 hpet_res->end = hpet_address + (1 * 1024) - 1; 949 950 return 0; 951 } 952 953 /* 954 * hpet_insert_resource inserts the HPET resources used into the resource 955 * tree. 956 */ 957 static __init int hpet_insert_resource(void) 958 { 959 if (!hpet_res) 960 return 1; 961 962 return insert_resource(&iomem_resource, hpet_res); 963 } 964 965 late_initcall(hpet_insert_resource); 966 967 #else 968 #define acpi_parse_hpet NULL 969 #endif 970 971 static int __init acpi_parse_fadt(struct acpi_table_header *table) 972 { 973 if (!(acpi_gbl_FADT.boot_flags & ACPI_FADT_LEGACY_DEVICES)) { 974 pr_debug("ACPI: no legacy devices present\n"); 975 x86_platform.legacy.devices.pnpbios = 0; 976 } 977 978 if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID && 979 !(acpi_gbl_FADT.boot_flags & ACPI_FADT_8042) && 980 x86_platform.legacy.i8042 != X86_LEGACY_I8042_PLATFORM_ABSENT) { 981 pr_debug("ACPI: i8042 controller is absent\n"); 982 x86_platform.legacy.i8042 = X86_LEGACY_I8042_FIRMWARE_ABSENT; 983 } 984 985 if (acpi_gbl_FADT.boot_flags & ACPI_FADT_NO_CMOS_RTC) { 986 pr_debug("ACPI: not registering RTC platform device\n"); 987 x86_platform.legacy.rtc = 0; 988 } 989 990 if (acpi_gbl_FADT.boot_flags & ACPI_FADT_NO_VGA) { 991 pr_debug("ACPI: probing for VGA not safe\n"); 992 x86_platform.legacy.no_vga = 1; 993 } 994 995 #ifdef CONFIG_X86_PM_TIMER 996 /* detect the location of the ACPI PM Timer */ 997 if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID) { 998 /* FADT rev. 2 */ 999 if (acpi_gbl_FADT.xpm_timer_block.space_id != 1000 ACPI_ADR_SPACE_SYSTEM_IO) 1001 return 0; 1002 1003 pmtmr_ioport = acpi_gbl_FADT.xpm_timer_block.address; 1004 /* 1005 * "X" fields are optional extensions to the original V1.0 1006 * fields, so we must selectively expand V1.0 fields if the 1007 * corresponding X field is zero. 1008 */ 1009 if (!pmtmr_ioport) 1010 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block; 1011 } else { 1012 /* FADT rev. 1 */ 1013 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block; 1014 } 1015 if (pmtmr_ioport) 1016 printk(KERN_INFO PREFIX "PM-Timer IO Port: %#x\n", 1017 pmtmr_ioport); 1018 #endif 1019 return 0; 1020 } 1021 1022 #ifdef CONFIG_X86_LOCAL_APIC 1023 /* 1024 * Parse LAPIC entries in MADT 1025 * returns 0 on success, < 0 on error 1026 */ 1027 1028 static int __init early_acpi_parse_madt_lapic_addr_ovr(void) 1029 { 1030 int count; 1031 1032 if (!boot_cpu_has(X86_FEATURE_APIC)) 1033 return -ENODEV; 1034 1035 /* 1036 * Note that the LAPIC address is obtained from the MADT (32-bit value) 1037 * and (optionally) overridden by a LAPIC_ADDR_OVR entry (64-bit value). 1038 */ 1039 1040 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE, 1041 acpi_parse_lapic_addr_ovr, 0); 1042 if (count < 0) { 1043 printk(KERN_ERR PREFIX 1044 "Error parsing LAPIC address override entry\n"); 1045 return count; 1046 } 1047 1048 register_lapic_address(acpi_lapic_addr); 1049 1050 return count; 1051 } 1052 1053 static int __init acpi_parse_madt_lapic_entries(void) 1054 { 1055 int count; 1056 int x2count = 0; 1057 int ret; 1058 struct acpi_subtable_proc madt_proc[2]; 1059 1060 if (!boot_cpu_has(X86_FEATURE_APIC)) 1061 return -ENODEV; 1062 1063 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC, 1064 acpi_parse_sapic, MAX_LOCAL_APIC); 1065 1066 if (!count) { 1067 memset(madt_proc, 0, sizeof(madt_proc)); 1068 madt_proc[0].id = ACPI_MADT_TYPE_LOCAL_APIC; 1069 madt_proc[0].handler = acpi_parse_lapic; 1070 madt_proc[1].id = ACPI_MADT_TYPE_LOCAL_X2APIC; 1071 madt_proc[1].handler = acpi_parse_x2apic; 1072 ret = acpi_table_parse_entries_array(ACPI_SIG_MADT, 1073 sizeof(struct acpi_table_madt), 1074 madt_proc, ARRAY_SIZE(madt_proc), MAX_LOCAL_APIC); 1075 if (ret < 0) { 1076 printk(KERN_ERR PREFIX 1077 "Error parsing LAPIC/X2APIC entries\n"); 1078 return ret; 1079 } 1080 1081 count = madt_proc[0].count; 1082 x2count = madt_proc[1].count; 1083 } 1084 if (!count && !x2count) { 1085 printk(KERN_ERR PREFIX "No LAPIC entries present\n"); 1086 /* TBD: Cleanup to allow fallback to MPS */ 1087 return -ENODEV; 1088 } else if (count < 0 || x2count < 0) { 1089 printk(KERN_ERR PREFIX "Error parsing LAPIC entry\n"); 1090 /* TBD: Cleanup to allow fallback to MPS */ 1091 return count; 1092 } 1093 1094 x2count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC_NMI, 1095 acpi_parse_x2apic_nmi, 0); 1096 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI, 1097 acpi_parse_lapic_nmi, 0); 1098 if (count < 0 || x2count < 0) { 1099 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n"); 1100 /* TBD: Cleanup to allow fallback to MPS */ 1101 return count; 1102 } 1103 return 0; 1104 } 1105 #endif /* CONFIG_X86_LOCAL_APIC */ 1106 1107 #ifdef CONFIG_X86_IO_APIC 1108 static void __init mp_config_acpi_legacy_irqs(void) 1109 { 1110 int i; 1111 struct mpc_intsrc mp_irq; 1112 1113 #ifdef CONFIG_EISA 1114 /* 1115 * Fabricate the legacy ISA bus (bus #31). 1116 */ 1117 mp_bus_id_to_type[MP_ISA_BUS] = MP_BUS_ISA; 1118 #endif 1119 set_bit(MP_ISA_BUS, mp_bus_not_pci); 1120 pr_debug("Bus #%d is ISA (nIRQs: %d)\n", MP_ISA_BUS, nr_legacy_irqs()); 1121 1122 /* 1123 * Use the default configuration for the IRQs 0-15. Unless 1124 * overridden by (MADT) interrupt source override entries. 1125 */ 1126 for (i = 0; i < nr_legacy_irqs(); i++) { 1127 int ioapic, pin; 1128 unsigned int dstapic; 1129 int idx; 1130 u32 gsi; 1131 1132 /* Locate the gsi that irq i maps to. */ 1133 if (acpi_isa_irq_to_gsi(i, &gsi)) 1134 continue; 1135 1136 /* 1137 * Locate the IOAPIC that manages the ISA IRQ. 1138 */ 1139 ioapic = mp_find_ioapic(gsi); 1140 if (ioapic < 0) 1141 continue; 1142 pin = mp_find_ioapic_pin(ioapic, gsi); 1143 dstapic = mpc_ioapic_id(ioapic); 1144 1145 for (idx = 0; idx < mp_irq_entries; idx++) { 1146 struct mpc_intsrc *irq = mp_irqs + idx; 1147 1148 /* Do we already have a mapping for this ISA IRQ? */ 1149 if (irq->srcbus == MP_ISA_BUS && irq->srcbusirq == i) 1150 break; 1151 1152 /* Do we already have a mapping for this IOAPIC pin */ 1153 if (irq->dstapic == dstapic && irq->dstirq == pin) 1154 break; 1155 } 1156 1157 if (idx != mp_irq_entries) { 1158 printk(KERN_DEBUG "ACPI: IRQ%d used by override.\n", i); 1159 continue; /* IRQ already used */ 1160 } 1161 1162 mp_irq.type = MP_INTSRC; 1163 mp_irq.irqflag = 0; /* Conforming */ 1164 mp_irq.srcbus = MP_ISA_BUS; 1165 mp_irq.dstapic = dstapic; 1166 mp_irq.irqtype = mp_INT; 1167 mp_irq.srcbusirq = i; /* Identity mapped */ 1168 mp_irq.dstirq = pin; 1169 1170 mp_save_irq(&mp_irq); 1171 } 1172 } 1173 1174 /* 1175 * Parse IOAPIC related entries in MADT 1176 * returns 0 on success, < 0 on error 1177 */ 1178 static int __init acpi_parse_madt_ioapic_entries(void) 1179 { 1180 int count; 1181 1182 /* 1183 * ACPI interpreter is required to complete interrupt setup, 1184 * so if it is off, don't enumerate the io-apics with ACPI. 1185 * If MPS is present, it will handle them, 1186 * otherwise the system will stay in PIC mode 1187 */ 1188 if (acpi_disabled || acpi_noirq) 1189 return -ENODEV; 1190 1191 if (!boot_cpu_has(X86_FEATURE_APIC)) 1192 return -ENODEV; 1193 1194 /* 1195 * if "noapic" boot option, don't look for IO-APICs 1196 */ 1197 if (skip_ioapic_setup) { 1198 printk(KERN_INFO PREFIX "Skipping IOAPIC probe " 1199 "due to 'noapic' option.\n"); 1200 return -ENODEV; 1201 } 1202 1203 count = acpi_table_parse_madt(ACPI_MADT_TYPE_IO_APIC, acpi_parse_ioapic, 1204 MAX_IO_APICS); 1205 if (!count) { 1206 printk(KERN_ERR PREFIX "No IOAPIC entries present\n"); 1207 return -ENODEV; 1208 } else if (count < 0) { 1209 printk(KERN_ERR PREFIX "Error parsing IOAPIC entry\n"); 1210 return count; 1211 } 1212 1213 count = acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE, 1214 acpi_parse_int_src_ovr, nr_irqs); 1215 if (count < 0) { 1216 printk(KERN_ERR PREFIX 1217 "Error parsing interrupt source overrides entry\n"); 1218 /* TBD: Cleanup to allow fallback to MPS */ 1219 return count; 1220 } 1221 1222 /* 1223 * If BIOS did not supply an INT_SRC_OVR for the SCI 1224 * pretend we got one so we can set the SCI flags. 1225 * But ignore setting up SCI on hardware reduced platforms. 1226 */ 1227 if (acpi_sci_override_gsi == INVALID_ACPI_IRQ && !acpi_gbl_reduced_hardware) 1228 acpi_sci_ioapic_setup(acpi_gbl_FADT.sci_interrupt, 0, 0, 1229 acpi_gbl_FADT.sci_interrupt); 1230 1231 /* Fill in identity legacy mappings where no override */ 1232 mp_config_acpi_legacy_irqs(); 1233 1234 count = acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE, 1235 acpi_parse_nmi_src, nr_irqs); 1236 if (count < 0) { 1237 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n"); 1238 /* TBD: Cleanup to allow fallback to MPS */ 1239 return count; 1240 } 1241 1242 return 0; 1243 } 1244 #else 1245 static inline int acpi_parse_madt_ioapic_entries(void) 1246 { 1247 return -1; 1248 } 1249 #endif /* !CONFIG_X86_IO_APIC */ 1250 1251 static void __init early_acpi_process_madt(void) 1252 { 1253 #ifdef CONFIG_X86_LOCAL_APIC 1254 int error; 1255 1256 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) { 1257 1258 /* 1259 * Parse MADT LAPIC entries 1260 */ 1261 error = early_acpi_parse_madt_lapic_addr_ovr(); 1262 if (!error) { 1263 acpi_lapic = 1; 1264 smp_found_config = 1; 1265 } 1266 if (error == -EINVAL) { 1267 /* 1268 * Dell Precision Workstation 410, 610 come here. 1269 */ 1270 printk(KERN_ERR PREFIX 1271 "Invalid BIOS MADT, disabling ACPI\n"); 1272 disable_acpi(); 1273 } 1274 } 1275 #endif 1276 } 1277 1278 static void __init acpi_process_madt(void) 1279 { 1280 #ifdef CONFIG_X86_LOCAL_APIC 1281 int error; 1282 1283 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) { 1284 1285 /* 1286 * Parse MADT LAPIC entries 1287 */ 1288 error = acpi_parse_madt_lapic_entries(); 1289 if (!error) { 1290 acpi_lapic = 1; 1291 1292 /* 1293 * Parse MADT IO-APIC entries 1294 */ 1295 mutex_lock(&acpi_ioapic_lock); 1296 error = acpi_parse_madt_ioapic_entries(); 1297 mutex_unlock(&acpi_ioapic_lock); 1298 if (!error) { 1299 acpi_set_irq_model_ioapic(); 1300 1301 smp_found_config = 1; 1302 } 1303 } 1304 if (error == -EINVAL) { 1305 /* 1306 * Dell Precision Workstation 410, 610 come here. 1307 */ 1308 printk(KERN_ERR PREFIX 1309 "Invalid BIOS MADT, disabling ACPI\n"); 1310 disable_acpi(); 1311 } 1312 } else { 1313 /* 1314 * ACPI found no MADT, and so ACPI wants UP PIC mode. 1315 * In the event an MPS table was found, forget it. 1316 * Boot with "acpi=off" to use MPS on such a system. 1317 */ 1318 if (smp_found_config) { 1319 printk(KERN_WARNING PREFIX 1320 "No APIC-table, disabling MPS\n"); 1321 smp_found_config = 0; 1322 } 1323 } 1324 1325 /* 1326 * ACPI supports both logical (e.g. Hyper-Threading) and physical 1327 * processors, where MPS only supports physical. 1328 */ 1329 if (acpi_lapic && acpi_ioapic) 1330 printk(KERN_INFO "Using ACPI (MADT) for SMP configuration " 1331 "information\n"); 1332 else if (acpi_lapic) 1333 printk(KERN_INFO "Using ACPI for processor (LAPIC) " 1334 "configuration information\n"); 1335 #endif 1336 return; 1337 } 1338 1339 static int __init disable_acpi_irq(const struct dmi_system_id *d) 1340 { 1341 if (!acpi_force) { 1342 printk(KERN_NOTICE "%s detected: force use of acpi=noirq\n", 1343 d->ident); 1344 acpi_noirq_set(); 1345 } 1346 return 0; 1347 } 1348 1349 static int __init disable_acpi_pci(const struct dmi_system_id *d) 1350 { 1351 if (!acpi_force) { 1352 printk(KERN_NOTICE "%s detected: force use of pci=noacpi\n", 1353 d->ident); 1354 acpi_disable_pci(); 1355 } 1356 return 0; 1357 } 1358 1359 static int __init dmi_disable_acpi(const struct dmi_system_id *d) 1360 { 1361 if (!acpi_force) { 1362 printk(KERN_NOTICE "%s detected: acpi off\n", d->ident); 1363 disable_acpi(); 1364 } else { 1365 printk(KERN_NOTICE 1366 "Warning: DMI blacklist says broken, but acpi forced\n"); 1367 } 1368 return 0; 1369 } 1370 1371 /* 1372 * Force ignoring BIOS IRQ0 override 1373 */ 1374 static int __init dmi_ignore_irq0_timer_override(const struct dmi_system_id *d) 1375 { 1376 if (!acpi_skip_timer_override) { 1377 pr_notice("%s detected: Ignoring BIOS IRQ0 override\n", 1378 d->ident); 1379 acpi_skip_timer_override = 1; 1380 } 1381 return 0; 1382 } 1383 1384 /* 1385 * ACPI offers an alternative platform interface model that removes 1386 * ACPI hardware requirements for platforms that do not implement 1387 * the PC Architecture. 1388 * 1389 * We initialize the Hardware-reduced ACPI model here: 1390 */ 1391 void __init acpi_generic_reduced_hw_init(void) 1392 { 1393 /* 1394 * Override x86_init functions and bypass legacy PIC in 1395 * hardware reduced ACPI mode. 1396 */ 1397 x86_init.timers.timer_init = x86_init_noop; 1398 x86_init.irqs.pre_vector_init = x86_init_noop; 1399 legacy_pic = &null_legacy_pic; 1400 } 1401 1402 static void __init acpi_reduced_hw_init(void) 1403 { 1404 if (acpi_gbl_reduced_hardware) 1405 x86_init.acpi.reduced_hw_early_init(); 1406 } 1407 1408 /* 1409 * If your system is blacklisted here, but you find that acpi=force 1410 * works for you, please contact linux-acpi@vger.kernel.org 1411 */ 1412 static const struct dmi_system_id acpi_dmi_table[] __initconst = { 1413 /* 1414 * Boxes that need ACPI disabled 1415 */ 1416 { 1417 .callback = dmi_disable_acpi, 1418 .ident = "IBM Thinkpad", 1419 .matches = { 1420 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), 1421 DMI_MATCH(DMI_BOARD_NAME, "2629H1G"), 1422 }, 1423 }, 1424 1425 /* 1426 * Boxes that need ACPI PCI IRQ routing disabled 1427 */ 1428 { 1429 .callback = disable_acpi_irq, 1430 .ident = "ASUS A7V", 1431 .matches = { 1432 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC"), 1433 DMI_MATCH(DMI_BOARD_NAME, "<A7V>"), 1434 /* newer BIOS, Revision 1011, does work */ 1435 DMI_MATCH(DMI_BIOS_VERSION, 1436 "ASUS A7V ACPI BIOS Revision 1007"), 1437 }, 1438 }, 1439 { 1440 /* 1441 * Latest BIOS for IBM 600E (1.16) has bad pcinum 1442 * for LPC bridge, which is needed for the PCI 1443 * interrupt links to work. DSDT fix is in bug 5966. 1444 * 2645, 2646 model numbers are shared with 600/600E/600X 1445 */ 1446 .callback = disable_acpi_irq, 1447 .ident = "IBM Thinkpad 600 Series 2645", 1448 .matches = { 1449 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), 1450 DMI_MATCH(DMI_BOARD_NAME, "2645"), 1451 }, 1452 }, 1453 { 1454 .callback = disable_acpi_irq, 1455 .ident = "IBM Thinkpad 600 Series 2646", 1456 .matches = { 1457 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), 1458 DMI_MATCH(DMI_BOARD_NAME, "2646"), 1459 }, 1460 }, 1461 /* 1462 * Boxes that need ACPI PCI IRQ routing and PCI scan disabled 1463 */ 1464 { /* _BBN 0 bug */ 1465 .callback = disable_acpi_pci, 1466 .ident = "ASUS PR-DLS", 1467 .matches = { 1468 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."), 1469 DMI_MATCH(DMI_BOARD_NAME, "PR-DLS"), 1470 DMI_MATCH(DMI_BIOS_VERSION, 1471 "ASUS PR-DLS ACPI BIOS Revision 1010"), 1472 DMI_MATCH(DMI_BIOS_DATE, "03/21/2003") 1473 }, 1474 }, 1475 { 1476 .callback = disable_acpi_pci, 1477 .ident = "Acer TravelMate 36x Laptop", 1478 .matches = { 1479 DMI_MATCH(DMI_SYS_VENDOR, "Acer"), 1480 DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"), 1481 }, 1482 }, 1483 {} 1484 }; 1485 1486 /* second table for DMI checks that should run after early-quirks */ 1487 static const struct dmi_system_id acpi_dmi_table_late[] __initconst = { 1488 /* 1489 * HP laptops which use a DSDT reporting as HP/SB400/10000, 1490 * which includes some code which overrides all temperature 1491 * trip points to 16C if the INTIN2 input of the I/O APIC 1492 * is enabled. This input is incorrectly designated the 1493 * ISA IRQ 0 via an interrupt source override even though 1494 * it is wired to the output of the master 8259A and INTIN0 1495 * is not connected at all. Force ignoring BIOS IRQ0 1496 * override in that cases. 1497 */ 1498 { 1499 .callback = dmi_ignore_irq0_timer_override, 1500 .ident = "HP nx6115 laptop", 1501 .matches = { 1502 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 1503 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6115"), 1504 }, 1505 }, 1506 { 1507 .callback = dmi_ignore_irq0_timer_override, 1508 .ident = "HP NX6125 laptop", 1509 .matches = { 1510 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 1511 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6125"), 1512 }, 1513 }, 1514 { 1515 .callback = dmi_ignore_irq0_timer_override, 1516 .ident = "HP NX6325 laptop", 1517 .matches = { 1518 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 1519 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6325"), 1520 }, 1521 }, 1522 { 1523 .callback = dmi_ignore_irq0_timer_override, 1524 .ident = "HP 6715b laptop", 1525 .matches = { 1526 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 1527 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq 6715b"), 1528 }, 1529 }, 1530 { 1531 .callback = dmi_ignore_irq0_timer_override, 1532 .ident = "FUJITSU SIEMENS", 1533 .matches = { 1534 DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"), 1535 DMI_MATCH(DMI_PRODUCT_NAME, "AMILO PRO V2030"), 1536 }, 1537 }, 1538 {} 1539 }; 1540 1541 /* 1542 * acpi_boot_table_init() and acpi_boot_init() 1543 * called from setup_arch(), always. 1544 * 1. checksums all tables 1545 * 2. enumerates lapics 1546 * 3. enumerates io-apics 1547 * 1548 * acpi_table_init() is separate to allow reading SRAT without 1549 * other side effects. 1550 * 1551 * side effects of acpi_boot_init: 1552 * acpi_lapic = 1 if LAPIC found 1553 * acpi_ioapic = 1 if IOAPIC found 1554 * if (acpi_lapic && acpi_ioapic) smp_found_config = 1; 1555 * if acpi_blacklisted() acpi_disabled = 1; 1556 * acpi_irq_model=... 1557 * ... 1558 */ 1559 1560 void __init acpi_boot_table_init(void) 1561 { 1562 dmi_check_system(acpi_dmi_table); 1563 1564 /* 1565 * If acpi_disabled, bail out 1566 */ 1567 if (acpi_disabled) 1568 return; 1569 1570 /* 1571 * Initialize the ACPI boot-time table parser. 1572 */ 1573 if (acpi_table_init()) { 1574 disable_acpi(); 1575 return; 1576 } 1577 1578 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf); 1579 1580 /* 1581 * blacklist may disable ACPI entirely 1582 */ 1583 if (acpi_blacklisted()) { 1584 if (acpi_force) { 1585 printk(KERN_WARNING PREFIX "acpi=force override\n"); 1586 } else { 1587 printk(KERN_WARNING PREFIX "Disabling ACPI support\n"); 1588 disable_acpi(); 1589 return; 1590 } 1591 } 1592 } 1593 1594 int __init early_acpi_boot_init(void) 1595 { 1596 /* 1597 * If acpi_disabled, bail out 1598 */ 1599 if (acpi_disabled) 1600 return 1; 1601 1602 /* 1603 * Process the Multiple APIC Description Table (MADT), if present 1604 */ 1605 early_acpi_process_madt(); 1606 1607 /* 1608 * Hardware-reduced ACPI mode initialization: 1609 */ 1610 acpi_reduced_hw_init(); 1611 1612 return 0; 1613 } 1614 1615 int __init acpi_boot_init(void) 1616 { 1617 /* those are executed after early-quirks are executed */ 1618 dmi_check_system(acpi_dmi_table_late); 1619 1620 /* 1621 * If acpi_disabled, bail out 1622 */ 1623 if (acpi_disabled) 1624 return 1; 1625 1626 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf); 1627 1628 /* 1629 * set sci_int and PM timer address 1630 */ 1631 acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt); 1632 1633 /* 1634 * Process the Multiple APIC Description Table (MADT), if present 1635 */ 1636 acpi_process_madt(); 1637 1638 acpi_table_parse(ACPI_SIG_HPET, acpi_parse_hpet); 1639 if (IS_ENABLED(CONFIG_ACPI_BGRT)) 1640 acpi_table_parse(ACPI_SIG_BGRT, acpi_parse_bgrt); 1641 1642 if (!acpi_noirq) 1643 x86_init.pci.init = pci_acpi_init; 1644 1645 /* Do not enable ACPI SPCR console by default */ 1646 acpi_parse_spcr(earlycon_acpi_spcr_enable, false); 1647 return 0; 1648 } 1649 1650 static int __init parse_acpi(char *arg) 1651 { 1652 if (!arg) 1653 return -EINVAL; 1654 1655 /* "acpi=off" disables both ACPI table parsing and interpreter */ 1656 if (strcmp(arg, "off") == 0) { 1657 disable_acpi(); 1658 } 1659 /* acpi=force to over-ride black-list */ 1660 else if (strcmp(arg, "force") == 0) { 1661 acpi_force = 1; 1662 acpi_disabled = 0; 1663 } 1664 /* acpi=strict disables out-of-spec workarounds */ 1665 else if (strcmp(arg, "strict") == 0) { 1666 acpi_strict = 1; 1667 } 1668 /* acpi=rsdt use RSDT instead of XSDT */ 1669 else if (strcmp(arg, "rsdt") == 0) { 1670 acpi_gbl_do_not_use_xsdt = TRUE; 1671 } 1672 /* "acpi=noirq" disables ACPI interrupt routing */ 1673 else if (strcmp(arg, "noirq") == 0) { 1674 acpi_noirq_set(); 1675 } 1676 /* "acpi=copy_dsdt" copys DSDT */ 1677 else if (strcmp(arg, "copy_dsdt") == 0) { 1678 acpi_gbl_copy_dsdt_locally = 1; 1679 } 1680 /* "acpi=nocmcff" disables FF mode for corrected errors */ 1681 else if (strcmp(arg, "nocmcff") == 0) { 1682 acpi_disable_cmcff = 1; 1683 } else { 1684 /* Core will printk when we return error. */ 1685 return -EINVAL; 1686 } 1687 return 0; 1688 } 1689 early_param("acpi", parse_acpi); 1690 1691 /* FIXME: Using pci= for an ACPI parameter is a travesty. */ 1692 static int __init parse_pci(char *arg) 1693 { 1694 if (arg && strcmp(arg, "noacpi") == 0) 1695 acpi_disable_pci(); 1696 return 0; 1697 } 1698 early_param("pci", parse_pci); 1699 1700 int __init acpi_mps_check(void) 1701 { 1702 #if defined(CONFIG_X86_LOCAL_APIC) && !defined(CONFIG_X86_MPPARSE) 1703 /* mptable code is not built-in*/ 1704 if (acpi_disabled || acpi_noirq) { 1705 printk(KERN_WARNING "MPS support code is not built-in.\n" 1706 "Using acpi=off or acpi=noirq or pci=noacpi " 1707 "may have problem\n"); 1708 return 1; 1709 } 1710 #endif 1711 return 0; 1712 } 1713 1714 #ifdef CONFIG_X86_IO_APIC 1715 static int __init parse_acpi_skip_timer_override(char *arg) 1716 { 1717 acpi_skip_timer_override = 1; 1718 return 0; 1719 } 1720 early_param("acpi_skip_timer_override", parse_acpi_skip_timer_override); 1721 1722 static int __init parse_acpi_use_timer_override(char *arg) 1723 { 1724 acpi_use_timer_override = 1; 1725 return 0; 1726 } 1727 early_param("acpi_use_timer_override", parse_acpi_use_timer_override); 1728 #endif /* CONFIG_X86_IO_APIC */ 1729 1730 static int __init setup_acpi_sci(char *s) 1731 { 1732 if (!s) 1733 return -EINVAL; 1734 if (!strcmp(s, "edge")) 1735 acpi_sci_flags = ACPI_MADT_TRIGGER_EDGE | 1736 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK); 1737 else if (!strcmp(s, "level")) 1738 acpi_sci_flags = ACPI_MADT_TRIGGER_LEVEL | 1739 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK); 1740 else if (!strcmp(s, "high")) 1741 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_HIGH | 1742 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK); 1743 else if (!strcmp(s, "low")) 1744 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_LOW | 1745 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK); 1746 else 1747 return -EINVAL; 1748 return 0; 1749 } 1750 early_param("acpi_sci", setup_acpi_sci); 1751 1752 int __acpi_acquire_global_lock(unsigned int *lock) 1753 { 1754 unsigned int old, new, val; 1755 do { 1756 old = *lock; 1757 new = (((old & ~0x3) + 2) + ((old >> 1) & 0x1)); 1758 val = cmpxchg(lock, old, new); 1759 } while (unlikely (val != old)); 1760 return (new < 3) ? -1 : 0; 1761 } 1762 1763 int __acpi_release_global_lock(unsigned int *lock) 1764 { 1765 unsigned int old, new, val; 1766 do { 1767 old = *lock; 1768 new = old & ~0x3; 1769 val = cmpxchg(lock, old, new); 1770 } while (unlikely (val != old)); 1771 return old & 0x1; 1772 } 1773 1774 void __init arch_reserve_mem_area(acpi_physical_address addr, size_t size) 1775 { 1776 e820__range_add(addr, size, E820_TYPE_ACPI); 1777 e820__update_table_print(); 1778 } 1779 1780 u64 x86_default_get_root_pointer(void) 1781 { 1782 return boot_params.acpi_rsdp_addr; 1783 } 1784