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 deivce 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); 938 939 hpet_res->name = (void *)&hpet_res[1]; 940 hpet_res->flags = IORESOURCE_MEM; 941 snprintf((char *)hpet_res->name, HPET_RESOURCE_NAME_SIZE, "HPET %u", 942 hpet_tbl->sequence); 943 944 hpet_res->start = hpet_address; 945 hpet_res->end = hpet_address + (1 * 1024) - 1; 946 947 return 0; 948 } 949 950 /* 951 * hpet_insert_resource inserts the HPET resources used into the resource 952 * tree. 953 */ 954 static __init int hpet_insert_resource(void) 955 { 956 if (!hpet_res) 957 return 1; 958 959 return insert_resource(&iomem_resource, hpet_res); 960 } 961 962 late_initcall(hpet_insert_resource); 963 964 #else 965 #define acpi_parse_hpet NULL 966 #endif 967 968 static int __init acpi_parse_fadt(struct acpi_table_header *table) 969 { 970 if (!(acpi_gbl_FADT.boot_flags & ACPI_FADT_LEGACY_DEVICES)) { 971 pr_debug("ACPI: no legacy devices present\n"); 972 x86_platform.legacy.devices.pnpbios = 0; 973 } 974 975 if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID && 976 !(acpi_gbl_FADT.boot_flags & ACPI_FADT_8042) && 977 x86_platform.legacy.i8042 != X86_LEGACY_I8042_PLATFORM_ABSENT) { 978 pr_debug("ACPI: i8042 controller is absent\n"); 979 x86_platform.legacy.i8042 = X86_LEGACY_I8042_FIRMWARE_ABSENT; 980 } 981 982 if (acpi_gbl_FADT.boot_flags & ACPI_FADT_NO_CMOS_RTC) { 983 pr_debug("ACPI: not registering RTC platform device\n"); 984 x86_platform.legacy.rtc = 0; 985 } 986 987 if (acpi_gbl_FADT.boot_flags & ACPI_FADT_NO_VGA) { 988 pr_debug("ACPI: probing for VGA not safe\n"); 989 x86_platform.legacy.no_vga = 1; 990 } 991 992 #ifdef CONFIG_X86_PM_TIMER 993 /* detect the location of the ACPI PM Timer */ 994 if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID) { 995 /* FADT rev. 2 */ 996 if (acpi_gbl_FADT.xpm_timer_block.space_id != 997 ACPI_ADR_SPACE_SYSTEM_IO) 998 return 0; 999 1000 pmtmr_ioport = acpi_gbl_FADT.xpm_timer_block.address; 1001 /* 1002 * "X" fields are optional extensions to the original V1.0 1003 * fields, so we must selectively expand V1.0 fields if the 1004 * corresponding X field is zero. 1005 */ 1006 if (!pmtmr_ioport) 1007 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block; 1008 } else { 1009 /* FADT rev. 1 */ 1010 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block; 1011 } 1012 if (pmtmr_ioport) 1013 printk(KERN_INFO PREFIX "PM-Timer IO Port: %#x\n", 1014 pmtmr_ioport); 1015 #endif 1016 return 0; 1017 } 1018 1019 #ifdef CONFIG_X86_LOCAL_APIC 1020 /* 1021 * Parse LAPIC entries in MADT 1022 * returns 0 on success, < 0 on error 1023 */ 1024 1025 static int __init early_acpi_parse_madt_lapic_addr_ovr(void) 1026 { 1027 int count; 1028 1029 if (!boot_cpu_has(X86_FEATURE_APIC)) 1030 return -ENODEV; 1031 1032 /* 1033 * Note that the LAPIC address is obtained from the MADT (32-bit value) 1034 * and (optionally) overridden by a LAPIC_ADDR_OVR entry (64-bit value). 1035 */ 1036 1037 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE, 1038 acpi_parse_lapic_addr_ovr, 0); 1039 if (count < 0) { 1040 printk(KERN_ERR PREFIX 1041 "Error parsing LAPIC address override entry\n"); 1042 return count; 1043 } 1044 1045 register_lapic_address(acpi_lapic_addr); 1046 1047 return count; 1048 } 1049 1050 static int __init acpi_parse_madt_lapic_entries(void) 1051 { 1052 int count; 1053 int x2count = 0; 1054 int ret; 1055 struct acpi_subtable_proc madt_proc[2]; 1056 1057 if (!boot_cpu_has(X86_FEATURE_APIC)) 1058 return -ENODEV; 1059 1060 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC, 1061 acpi_parse_sapic, MAX_LOCAL_APIC); 1062 1063 if (!count) { 1064 memset(madt_proc, 0, sizeof(madt_proc)); 1065 madt_proc[0].id = ACPI_MADT_TYPE_LOCAL_APIC; 1066 madt_proc[0].handler = acpi_parse_lapic; 1067 madt_proc[1].id = ACPI_MADT_TYPE_LOCAL_X2APIC; 1068 madt_proc[1].handler = acpi_parse_x2apic; 1069 ret = acpi_table_parse_entries_array(ACPI_SIG_MADT, 1070 sizeof(struct acpi_table_madt), 1071 madt_proc, ARRAY_SIZE(madt_proc), MAX_LOCAL_APIC); 1072 if (ret < 0) { 1073 printk(KERN_ERR PREFIX 1074 "Error parsing LAPIC/X2APIC entries\n"); 1075 return ret; 1076 } 1077 1078 count = madt_proc[0].count; 1079 x2count = madt_proc[1].count; 1080 } 1081 if (!count && !x2count) { 1082 printk(KERN_ERR PREFIX "No LAPIC entries present\n"); 1083 /* TBD: Cleanup to allow fallback to MPS */ 1084 return -ENODEV; 1085 } else if (count < 0 || x2count < 0) { 1086 printk(KERN_ERR PREFIX "Error parsing LAPIC entry\n"); 1087 /* TBD: Cleanup to allow fallback to MPS */ 1088 return count; 1089 } 1090 1091 x2count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC_NMI, 1092 acpi_parse_x2apic_nmi, 0); 1093 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI, 1094 acpi_parse_lapic_nmi, 0); 1095 if (count < 0 || x2count < 0) { 1096 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n"); 1097 /* TBD: Cleanup to allow fallback to MPS */ 1098 return count; 1099 } 1100 return 0; 1101 } 1102 #endif /* CONFIG_X86_LOCAL_APIC */ 1103 1104 #ifdef CONFIG_X86_IO_APIC 1105 static void __init mp_config_acpi_legacy_irqs(void) 1106 { 1107 int i; 1108 struct mpc_intsrc mp_irq; 1109 1110 #ifdef CONFIG_EISA 1111 /* 1112 * Fabricate the legacy ISA bus (bus #31). 1113 */ 1114 mp_bus_id_to_type[MP_ISA_BUS] = MP_BUS_ISA; 1115 #endif 1116 set_bit(MP_ISA_BUS, mp_bus_not_pci); 1117 pr_debug("Bus #%d is ISA (nIRQs: %d)\n", MP_ISA_BUS, nr_legacy_irqs()); 1118 1119 /* 1120 * Use the default configuration for the IRQs 0-15. Unless 1121 * overridden by (MADT) interrupt source override entries. 1122 */ 1123 for (i = 0; i < nr_legacy_irqs(); i++) { 1124 int ioapic, pin; 1125 unsigned int dstapic; 1126 int idx; 1127 u32 gsi; 1128 1129 /* Locate the gsi that irq i maps to. */ 1130 if (acpi_isa_irq_to_gsi(i, &gsi)) 1131 continue; 1132 1133 /* 1134 * Locate the IOAPIC that manages the ISA IRQ. 1135 */ 1136 ioapic = mp_find_ioapic(gsi); 1137 if (ioapic < 0) 1138 continue; 1139 pin = mp_find_ioapic_pin(ioapic, gsi); 1140 dstapic = mpc_ioapic_id(ioapic); 1141 1142 for (idx = 0; idx < mp_irq_entries; idx++) { 1143 struct mpc_intsrc *irq = mp_irqs + idx; 1144 1145 /* Do we already have a mapping for this ISA IRQ? */ 1146 if (irq->srcbus == MP_ISA_BUS && irq->srcbusirq == i) 1147 break; 1148 1149 /* Do we already have a mapping for this IOAPIC pin */ 1150 if (irq->dstapic == dstapic && irq->dstirq == pin) 1151 break; 1152 } 1153 1154 if (idx != mp_irq_entries) { 1155 printk(KERN_DEBUG "ACPI: IRQ%d used by override.\n", i); 1156 continue; /* IRQ already used */ 1157 } 1158 1159 mp_irq.type = MP_INTSRC; 1160 mp_irq.irqflag = 0; /* Conforming */ 1161 mp_irq.srcbus = MP_ISA_BUS; 1162 mp_irq.dstapic = dstapic; 1163 mp_irq.irqtype = mp_INT; 1164 mp_irq.srcbusirq = i; /* Identity mapped */ 1165 mp_irq.dstirq = pin; 1166 1167 mp_save_irq(&mp_irq); 1168 } 1169 } 1170 1171 /* 1172 * Parse IOAPIC related entries in MADT 1173 * returns 0 on success, < 0 on error 1174 */ 1175 static int __init acpi_parse_madt_ioapic_entries(void) 1176 { 1177 int count; 1178 1179 /* 1180 * ACPI interpreter is required to complete interrupt setup, 1181 * so if it is off, don't enumerate the io-apics with ACPI. 1182 * If MPS is present, it will handle them, 1183 * otherwise the system will stay in PIC mode 1184 */ 1185 if (acpi_disabled || acpi_noirq) 1186 return -ENODEV; 1187 1188 if (!boot_cpu_has(X86_FEATURE_APIC)) 1189 return -ENODEV; 1190 1191 /* 1192 * if "noapic" boot option, don't look for IO-APICs 1193 */ 1194 if (skip_ioapic_setup) { 1195 printk(KERN_INFO PREFIX "Skipping IOAPIC probe " 1196 "due to 'noapic' option.\n"); 1197 return -ENODEV; 1198 } 1199 1200 count = acpi_table_parse_madt(ACPI_MADT_TYPE_IO_APIC, acpi_parse_ioapic, 1201 MAX_IO_APICS); 1202 if (!count) { 1203 printk(KERN_ERR PREFIX "No IOAPIC entries present\n"); 1204 return -ENODEV; 1205 } else if (count < 0) { 1206 printk(KERN_ERR PREFIX "Error parsing IOAPIC entry\n"); 1207 return count; 1208 } 1209 1210 count = acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE, 1211 acpi_parse_int_src_ovr, nr_irqs); 1212 if (count < 0) { 1213 printk(KERN_ERR PREFIX 1214 "Error parsing interrupt source overrides entry\n"); 1215 /* TBD: Cleanup to allow fallback to MPS */ 1216 return count; 1217 } 1218 1219 /* 1220 * If BIOS did not supply an INT_SRC_OVR for the SCI 1221 * pretend we got one so we can set the SCI flags. 1222 * But ignore setting up SCI on hardware reduced platforms. 1223 */ 1224 if (acpi_sci_override_gsi == INVALID_ACPI_IRQ && !acpi_gbl_reduced_hardware) 1225 acpi_sci_ioapic_setup(acpi_gbl_FADT.sci_interrupt, 0, 0, 1226 acpi_gbl_FADT.sci_interrupt); 1227 1228 /* Fill in identity legacy mappings where no override */ 1229 mp_config_acpi_legacy_irqs(); 1230 1231 count = acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE, 1232 acpi_parse_nmi_src, nr_irqs); 1233 if (count < 0) { 1234 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n"); 1235 /* TBD: Cleanup to allow fallback to MPS */ 1236 return count; 1237 } 1238 1239 return 0; 1240 } 1241 #else 1242 static inline int acpi_parse_madt_ioapic_entries(void) 1243 { 1244 return -1; 1245 } 1246 #endif /* !CONFIG_X86_IO_APIC */ 1247 1248 static void __init early_acpi_process_madt(void) 1249 { 1250 #ifdef CONFIG_X86_LOCAL_APIC 1251 int error; 1252 1253 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) { 1254 1255 /* 1256 * Parse MADT LAPIC entries 1257 */ 1258 error = early_acpi_parse_madt_lapic_addr_ovr(); 1259 if (!error) { 1260 acpi_lapic = 1; 1261 smp_found_config = 1; 1262 } 1263 if (error == -EINVAL) { 1264 /* 1265 * Dell Precision Workstation 410, 610 come here. 1266 */ 1267 printk(KERN_ERR PREFIX 1268 "Invalid BIOS MADT, disabling ACPI\n"); 1269 disable_acpi(); 1270 } 1271 } 1272 #endif 1273 } 1274 1275 static void __init acpi_process_madt(void) 1276 { 1277 #ifdef CONFIG_X86_LOCAL_APIC 1278 int error; 1279 1280 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) { 1281 1282 /* 1283 * Parse MADT LAPIC entries 1284 */ 1285 error = acpi_parse_madt_lapic_entries(); 1286 if (!error) { 1287 acpi_lapic = 1; 1288 1289 /* 1290 * Parse MADT IO-APIC entries 1291 */ 1292 mutex_lock(&acpi_ioapic_lock); 1293 error = acpi_parse_madt_ioapic_entries(); 1294 mutex_unlock(&acpi_ioapic_lock); 1295 if (!error) { 1296 acpi_set_irq_model_ioapic(); 1297 1298 smp_found_config = 1; 1299 } 1300 } 1301 if (error == -EINVAL) { 1302 /* 1303 * Dell Precision Workstation 410, 610 come here. 1304 */ 1305 printk(KERN_ERR PREFIX 1306 "Invalid BIOS MADT, disabling ACPI\n"); 1307 disable_acpi(); 1308 } 1309 } else { 1310 /* 1311 * ACPI found no MADT, and so ACPI wants UP PIC mode. 1312 * In the event an MPS table was found, forget it. 1313 * Boot with "acpi=off" to use MPS on such a system. 1314 */ 1315 if (smp_found_config) { 1316 printk(KERN_WARNING PREFIX 1317 "No APIC-table, disabling MPS\n"); 1318 smp_found_config = 0; 1319 } 1320 } 1321 1322 /* 1323 * ACPI supports both logical (e.g. Hyper-Threading) and physical 1324 * processors, where MPS only supports physical. 1325 */ 1326 if (acpi_lapic && acpi_ioapic) 1327 printk(KERN_INFO "Using ACPI (MADT) for SMP configuration " 1328 "information\n"); 1329 else if (acpi_lapic) 1330 printk(KERN_INFO "Using ACPI for processor (LAPIC) " 1331 "configuration information\n"); 1332 #endif 1333 return; 1334 } 1335 1336 static int __init disable_acpi_irq(const struct dmi_system_id *d) 1337 { 1338 if (!acpi_force) { 1339 printk(KERN_NOTICE "%s detected: force use of acpi=noirq\n", 1340 d->ident); 1341 acpi_noirq_set(); 1342 } 1343 return 0; 1344 } 1345 1346 static int __init disable_acpi_pci(const struct dmi_system_id *d) 1347 { 1348 if (!acpi_force) { 1349 printk(KERN_NOTICE "%s detected: force use of pci=noacpi\n", 1350 d->ident); 1351 acpi_disable_pci(); 1352 } 1353 return 0; 1354 } 1355 1356 static int __init dmi_disable_acpi(const struct dmi_system_id *d) 1357 { 1358 if (!acpi_force) { 1359 printk(KERN_NOTICE "%s detected: acpi off\n", d->ident); 1360 disable_acpi(); 1361 } else { 1362 printk(KERN_NOTICE 1363 "Warning: DMI blacklist says broken, but acpi forced\n"); 1364 } 1365 return 0; 1366 } 1367 1368 /* 1369 * Force ignoring BIOS IRQ0 override 1370 */ 1371 static int __init dmi_ignore_irq0_timer_override(const struct dmi_system_id *d) 1372 { 1373 if (!acpi_skip_timer_override) { 1374 pr_notice("%s detected: Ignoring BIOS IRQ0 override\n", 1375 d->ident); 1376 acpi_skip_timer_override = 1; 1377 } 1378 return 0; 1379 } 1380 1381 /* 1382 * ACPI offers an alternative platform interface model that removes 1383 * ACPI hardware requirements for platforms that do not implement 1384 * the PC Architecture. 1385 * 1386 * We initialize the Hardware-reduced ACPI model here: 1387 */ 1388 void __init acpi_generic_reduced_hw_init(void) 1389 { 1390 /* 1391 * Override x86_init functions and bypass legacy PIC in 1392 * hardware reduced ACPI mode. 1393 */ 1394 x86_init.timers.timer_init = x86_init_noop; 1395 x86_init.irqs.pre_vector_init = x86_init_noop; 1396 legacy_pic = &null_legacy_pic; 1397 } 1398 1399 static void __init acpi_reduced_hw_init(void) 1400 { 1401 if (acpi_gbl_reduced_hardware) 1402 x86_init.acpi.reduced_hw_early_init(); 1403 } 1404 1405 /* 1406 * If your system is blacklisted here, but you find that acpi=force 1407 * works for you, please contact linux-acpi@vger.kernel.org 1408 */ 1409 static const struct dmi_system_id acpi_dmi_table[] __initconst = { 1410 /* 1411 * Boxes that need ACPI disabled 1412 */ 1413 { 1414 .callback = dmi_disable_acpi, 1415 .ident = "IBM Thinkpad", 1416 .matches = { 1417 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), 1418 DMI_MATCH(DMI_BOARD_NAME, "2629H1G"), 1419 }, 1420 }, 1421 1422 /* 1423 * Boxes that need ACPI PCI IRQ routing disabled 1424 */ 1425 { 1426 .callback = disable_acpi_irq, 1427 .ident = "ASUS A7V", 1428 .matches = { 1429 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC"), 1430 DMI_MATCH(DMI_BOARD_NAME, "<A7V>"), 1431 /* newer BIOS, Revision 1011, does work */ 1432 DMI_MATCH(DMI_BIOS_VERSION, 1433 "ASUS A7V ACPI BIOS Revision 1007"), 1434 }, 1435 }, 1436 { 1437 /* 1438 * Latest BIOS for IBM 600E (1.16) has bad pcinum 1439 * for LPC bridge, which is needed for the PCI 1440 * interrupt links to work. DSDT fix is in bug 5966. 1441 * 2645, 2646 model numbers are shared with 600/600E/600X 1442 */ 1443 .callback = disable_acpi_irq, 1444 .ident = "IBM Thinkpad 600 Series 2645", 1445 .matches = { 1446 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), 1447 DMI_MATCH(DMI_BOARD_NAME, "2645"), 1448 }, 1449 }, 1450 { 1451 .callback = disable_acpi_irq, 1452 .ident = "IBM Thinkpad 600 Series 2646", 1453 .matches = { 1454 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), 1455 DMI_MATCH(DMI_BOARD_NAME, "2646"), 1456 }, 1457 }, 1458 /* 1459 * Boxes that need ACPI PCI IRQ routing and PCI scan disabled 1460 */ 1461 { /* _BBN 0 bug */ 1462 .callback = disable_acpi_pci, 1463 .ident = "ASUS PR-DLS", 1464 .matches = { 1465 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."), 1466 DMI_MATCH(DMI_BOARD_NAME, "PR-DLS"), 1467 DMI_MATCH(DMI_BIOS_VERSION, 1468 "ASUS PR-DLS ACPI BIOS Revision 1010"), 1469 DMI_MATCH(DMI_BIOS_DATE, "03/21/2003") 1470 }, 1471 }, 1472 { 1473 .callback = disable_acpi_pci, 1474 .ident = "Acer TravelMate 36x Laptop", 1475 .matches = { 1476 DMI_MATCH(DMI_SYS_VENDOR, "Acer"), 1477 DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"), 1478 }, 1479 }, 1480 {} 1481 }; 1482 1483 /* second table for DMI checks that should run after early-quirks */ 1484 static const struct dmi_system_id acpi_dmi_table_late[] __initconst = { 1485 /* 1486 * HP laptops which use a DSDT reporting as HP/SB400/10000, 1487 * which includes some code which overrides all temperature 1488 * trip points to 16C if the INTIN2 input of the I/O APIC 1489 * is enabled. This input is incorrectly designated the 1490 * ISA IRQ 0 via an interrupt source override even though 1491 * it is wired to the output of the master 8259A and INTIN0 1492 * is not connected at all. Force ignoring BIOS IRQ0 1493 * override in that cases. 1494 */ 1495 { 1496 .callback = dmi_ignore_irq0_timer_override, 1497 .ident = "HP nx6115 laptop", 1498 .matches = { 1499 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 1500 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6115"), 1501 }, 1502 }, 1503 { 1504 .callback = dmi_ignore_irq0_timer_override, 1505 .ident = "HP NX6125 laptop", 1506 .matches = { 1507 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 1508 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6125"), 1509 }, 1510 }, 1511 { 1512 .callback = dmi_ignore_irq0_timer_override, 1513 .ident = "HP NX6325 laptop", 1514 .matches = { 1515 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 1516 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6325"), 1517 }, 1518 }, 1519 { 1520 .callback = dmi_ignore_irq0_timer_override, 1521 .ident = "HP 6715b laptop", 1522 .matches = { 1523 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 1524 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq 6715b"), 1525 }, 1526 }, 1527 { 1528 .callback = dmi_ignore_irq0_timer_override, 1529 .ident = "FUJITSU SIEMENS", 1530 .matches = { 1531 DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"), 1532 DMI_MATCH(DMI_PRODUCT_NAME, "AMILO PRO V2030"), 1533 }, 1534 }, 1535 {} 1536 }; 1537 1538 /* 1539 * acpi_boot_table_init() and acpi_boot_init() 1540 * called from setup_arch(), always. 1541 * 1. checksums all tables 1542 * 2. enumerates lapics 1543 * 3. enumerates io-apics 1544 * 1545 * acpi_table_init() is separate to allow reading SRAT without 1546 * other side effects. 1547 * 1548 * side effects of acpi_boot_init: 1549 * acpi_lapic = 1 if LAPIC found 1550 * acpi_ioapic = 1 if IOAPIC found 1551 * if (acpi_lapic && acpi_ioapic) smp_found_config = 1; 1552 * if acpi_blacklisted() acpi_disabled = 1; 1553 * acpi_irq_model=... 1554 * ... 1555 */ 1556 1557 void __init acpi_boot_table_init(void) 1558 { 1559 dmi_check_system(acpi_dmi_table); 1560 1561 /* 1562 * If acpi_disabled, bail out 1563 */ 1564 if (acpi_disabled) 1565 return; 1566 1567 /* 1568 * Initialize the ACPI boot-time table parser. 1569 */ 1570 if (acpi_table_init()) { 1571 disable_acpi(); 1572 return; 1573 } 1574 1575 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf); 1576 1577 /* 1578 * blacklist may disable ACPI entirely 1579 */ 1580 if (acpi_blacklisted()) { 1581 if (acpi_force) { 1582 printk(KERN_WARNING PREFIX "acpi=force override\n"); 1583 } else { 1584 printk(KERN_WARNING PREFIX "Disabling ACPI support\n"); 1585 disable_acpi(); 1586 return; 1587 } 1588 } 1589 } 1590 1591 int __init early_acpi_boot_init(void) 1592 { 1593 /* 1594 * If acpi_disabled, bail out 1595 */ 1596 if (acpi_disabled) 1597 return 1; 1598 1599 /* 1600 * Process the Multiple APIC Description Table (MADT), if present 1601 */ 1602 early_acpi_process_madt(); 1603 1604 /* 1605 * Hardware-reduced ACPI mode initialization: 1606 */ 1607 acpi_reduced_hw_init(); 1608 1609 return 0; 1610 } 1611 1612 int __init acpi_boot_init(void) 1613 { 1614 /* those are executed after early-quirks are executed */ 1615 dmi_check_system(acpi_dmi_table_late); 1616 1617 /* 1618 * If acpi_disabled, bail out 1619 */ 1620 if (acpi_disabled) 1621 return 1; 1622 1623 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf); 1624 1625 /* 1626 * set sci_int and PM timer address 1627 */ 1628 acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt); 1629 1630 /* 1631 * Process the Multiple APIC Description Table (MADT), if present 1632 */ 1633 acpi_process_madt(); 1634 1635 acpi_table_parse(ACPI_SIG_HPET, acpi_parse_hpet); 1636 if (IS_ENABLED(CONFIG_ACPI_BGRT)) 1637 acpi_table_parse(ACPI_SIG_BGRT, acpi_parse_bgrt); 1638 1639 if (!acpi_noirq) 1640 x86_init.pci.init = pci_acpi_init; 1641 1642 /* Do not enable ACPI SPCR console by default */ 1643 acpi_parse_spcr(earlycon_acpi_spcr_enable, false); 1644 return 0; 1645 } 1646 1647 static int __init parse_acpi(char *arg) 1648 { 1649 if (!arg) 1650 return -EINVAL; 1651 1652 /* "acpi=off" disables both ACPI table parsing and interpreter */ 1653 if (strcmp(arg, "off") == 0) { 1654 disable_acpi(); 1655 } 1656 /* acpi=force to over-ride black-list */ 1657 else if (strcmp(arg, "force") == 0) { 1658 acpi_force = 1; 1659 acpi_disabled = 0; 1660 } 1661 /* acpi=strict disables out-of-spec workarounds */ 1662 else if (strcmp(arg, "strict") == 0) { 1663 acpi_strict = 1; 1664 } 1665 /* acpi=rsdt use RSDT instead of XSDT */ 1666 else if (strcmp(arg, "rsdt") == 0) { 1667 acpi_gbl_do_not_use_xsdt = TRUE; 1668 } 1669 /* "acpi=noirq" disables ACPI interrupt routing */ 1670 else if (strcmp(arg, "noirq") == 0) { 1671 acpi_noirq_set(); 1672 } 1673 /* "acpi=copy_dsdt" copys DSDT */ 1674 else if (strcmp(arg, "copy_dsdt") == 0) { 1675 acpi_gbl_copy_dsdt_locally = 1; 1676 } 1677 /* "acpi=nocmcff" disables FF mode for corrected errors */ 1678 else if (strcmp(arg, "nocmcff") == 0) { 1679 acpi_disable_cmcff = 1; 1680 } else { 1681 /* Core will printk when we return error. */ 1682 return -EINVAL; 1683 } 1684 return 0; 1685 } 1686 early_param("acpi", parse_acpi); 1687 1688 /* FIXME: Using pci= for an ACPI parameter is a travesty. */ 1689 static int __init parse_pci(char *arg) 1690 { 1691 if (arg && strcmp(arg, "noacpi") == 0) 1692 acpi_disable_pci(); 1693 return 0; 1694 } 1695 early_param("pci", parse_pci); 1696 1697 int __init acpi_mps_check(void) 1698 { 1699 #if defined(CONFIG_X86_LOCAL_APIC) && !defined(CONFIG_X86_MPPARSE) 1700 /* mptable code is not built-in*/ 1701 if (acpi_disabled || acpi_noirq) { 1702 printk(KERN_WARNING "MPS support code is not built-in.\n" 1703 "Using acpi=off or acpi=noirq or pci=noacpi " 1704 "may have problem\n"); 1705 return 1; 1706 } 1707 #endif 1708 return 0; 1709 } 1710 1711 #ifdef CONFIG_X86_IO_APIC 1712 static int __init parse_acpi_skip_timer_override(char *arg) 1713 { 1714 acpi_skip_timer_override = 1; 1715 return 0; 1716 } 1717 early_param("acpi_skip_timer_override", parse_acpi_skip_timer_override); 1718 1719 static int __init parse_acpi_use_timer_override(char *arg) 1720 { 1721 acpi_use_timer_override = 1; 1722 return 0; 1723 } 1724 early_param("acpi_use_timer_override", parse_acpi_use_timer_override); 1725 #endif /* CONFIG_X86_IO_APIC */ 1726 1727 static int __init setup_acpi_sci(char *s) 1728 { 1729 if (!s) 1730 return -EINVAL; 1731 if (!strcmp(s, "edge")) 1732 acpi_sci_flags = ACPI_MADT_TRIGGER_EDGE | 1733 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK); 1734 else if (!strcmp(s, "level")) 1735 acpi_sci_flags = ACPI_MADT_TRIGGER_LEVEL | 1736 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK); 1737 else if (!strcmp(s, "high")) 1738 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_HIGH | 1739 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK); 1740 else if (!strcmp(s, "low")) 1741 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_LOW | 1742 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK); 1743 else 1744 return -EINVAL; 1745 return 0; 1746 } 1747 early_param("acpi_sci", setup_acpi_sci); 1748 1749 int __acpi_acquire_global_lock(unsigned int *lock) 1750 { 1751 unsigned int old, new, val; 1752 do { 1753 old = *lock; 1754 new = (((old & ~0x3) + 2) + ((old >> 1) & 0x1)); 1755 val = cmpxchg(lock, old, new); 1756 } while (unlikely (val != old)); 1757 return (new < 3) ? -1 : 0; 1758 } 1759 1760 int __acpi_release_global_lock(unsigned int *lock) 1761 { 1762 unsigned int old, new, val; 1763 do { 1764 old = *lock; 1765 new = old & ~0x3; 1766 val = cmpxchg(lock, old, new); 1767 } while (unlikely (val != old)); 1768 return old & 0x1; 1769 } 1770 1771 void __init arch_reserve_mem_area(acpi_physical_address addr, size_t size) 1772 { 1773 e820__range_add(addr, size, E820_TYPE_ACPI); 1774 e820__update_table_print(); 1775 } 1776 1777 u64 x86_default_get_root_pointer(void) 1778 { 1779 return boot_params.hdr.acpi_rsdp_addr; 1780 } 1781