1 /* 2 * boot.c - Architecture-Specific Low-Level ACPI Boot Support 3 * 4 * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com> 5 * Copyright (C) 2001 Jun Nakajima <jun.nakajima@intel.com> 6 * 7 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 8 * 9 * This program is free software; you can redistribute it and/or modify 10 * it under the terms of the GNU General Public License as published by 11 * the Free Software Foundation; either version 2 of the License, or 12 * (at your option) any later version. 13 * 14 * This program is distributed in the hope that it will be useful, 15 * but WITHOUT ANY WARRANTY; without even the implied warranty of 16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 17 * GNU General Public License for more details. 18 * 19 * You should have received a copy of the GNU General Public License 20 * along with this program; if not, write to the Free Software 21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 22 * 23 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 24 */ 25 26 #include <linux/init.h> 27 #include <linux/acpi.h> 28 #include <linux/acpi_pmtmr.h> 29 #include <linux/efi.h> 30 #include <linux/cpumask.h> 31 #include <linux/export.h> 32 #include <linux/dmi.h> 33 #include <linux/irq.h> 34 #include <linux/slab.h> 35 #include <linux/bootmem.h> 36 #include <linux/ioport.h> 37 #include <linux/pci.h> 38 #include <linux/efi-bgrt.h> 39 #include <linux/serial_core.h> 40 41 #include <asm/e820/api.h> 42 #include <asm/irqdomain.h> 43 #include <asm/pci_x86.h> 44 #include <asm/pgtable.h> 45 #include <asm/io_apic.h> 46 #include <asm/apic.h> 47 #include <asm/io.h> 48 #include <asm/mpspec.h> 49 #include <asm/smp.h> 50 #include <asm/i8259.h> 51 52 #include "sleep.h" /* To include x86_acpi_suspend_lowlevel */ 53 static int __initdata acpi_force = 0; 54 int acpi_disabled; 55 EXPORT_SYMBOL(acpi_disabled); 56 57 #ifdef CONFIG_X86_64 58 # include <asm/proto.h> 59 #endif /* X86 */ 60 61 #define PREFIX "ACPI: " 62 63 int acpi_noirq; /* skip ACPI IRQ initialization */ 64 int acpi_pci_disabled; /* skip ACPI PCI scan and IRQ initialization */ 65 EXPORT_SYMBOL(acpi_pci_disabled); 66 67 int acpi_lapic; 68 int acpi_ioapic; 69 int acpi_strict; 70 int acpi_disable_cmcff; 71 72 /* ACPI SCI override configuration */ 73 u8 acpi_sci_flags __initdata; 74 u32 acpi_sci_override_gsi __initdata = INVALID_ACPI_IRQ; 75 int acpi_skip_timer_override __initdata; 76 int acpi_use_timer_override __initdata; 77 int acpi_fix_pin2_polarity __initdata; 78 79 #ifdef CONFIG_X86_LOCAL_APIC 80 static u64 acpi_lapic_addr __initdata = APIC_DEFAULT_PHYS_BASE; 81 #endif 82 83 #ifdef CONFIG_X86_IO_APIC 84 /* 85 * Locks related to IOAPIC hotplug 86 * Hotplug side: 87 * ->device_hotplug_lock 88 * ->acpi_ioapic_lock 89 * ->ioapic_lock 90 * Interrupt mapping side: 91 * ->acpi_ioapic_lock 92 * ->ioapic_mutex 93 * ->ioapic_lock 94 */ 95 static DEFINE_MUTEX(acpi_ioapic_lock); 96 #endif 97 98 /* -------------------------------------------------------------------------- 99 Boot-time Configuration 100 -------------------------------------------------------------------------- */ 101 102 /* 103 * The default interrupt routing model is PIC (8259). This gets 104 * overridden if IOAPICs are enumerated (below). 105 */ 106 enum acpi_irq_model_id acpi_irq_model = ACPI_IRQ_MODEL_PIC; 107 108 109 /* 110 * ISA irqs by default are the first 16 gsis but can be 111 * any gsi as specified by an interrupt source override. 112 */ 113 static u32 isa_irq_to_gsi[NR_IRQS_LEGACY] __read_mostly = { 114 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 115 }; 116 117 /* 118 * This is just a simple wrapper around early_memremap(), 119 * with sanity checks for phys == 0 and size == 0. 120 */ 121 void __init __iomem *__acpi_map_table(unsigned long phys, unsigned long size) 122 { 123 124 if (!phys || !size) 125 return NULL; 126 127 return early_memremap(phys, size); 128 } 129 130 void __init __acpi_unmap_table(void __iomem *map, unsigned long size) 131 { 132 if (!map || !size) 133 return; 134 135 early_memunmap(map, size); 136 } 137 138 #ifdef CONFIG_X86_LOCAL_APIC 139 static int __init acpi_parse_madt(struct acpi_table_header *table) 140 { 141 struct acpi_table_madt *madt = NULL; 142 143 if (!boot_cpu_has(X86_FEATURE_APIC)) 144 return -EINVAL; 145 146 madt = (struct acpi_table_madt *)table; 147 if (!madt) { 148 printk(KERN_WARNING PREFIX "Unable to map MADT\n"); 149 return -ENODEV; 150 } 151 152 if (madt->address) { 153 acpi_lapic_addr = (u64) madt->address; 154 155 printk(KERN_DEBUG PREFIX "Local APIC address 0x%08x\n", 156 madt->address); 157 } 158 159 default_acpi_madt_oem_check(madt->header.oem_id, 160 madt->header.oem_table_id); 161 162 return 0; 163 } 164 165 /** 166 * acpi_register_lapic - register a local apic and generates a logic cpu number 167 * @id: local apic id to register 168 * @acpiid: ACPI id to register 169 * @enabled: this cpu is enabled or not 170 * 171 * Returns the logic cpu number which maps to the local apic 172 */ 173 static int acpi_register_lapic(int id, u32 acpiid, u8 enabled) 174 { 175 unsigned int ver = 0; 176 int cpu; 177 178 if (id >= MAX_LOCAL_APIC) { 179 printk(KERN_INFO PREFIX "skipped apicid that is too big\n"); 180 return -EINVAL; 181 } 182 183 if (!enabled) { 184 ++disabled_cpus; 185 return -EINVAL; 186 } 187 188 if (boot_cpu_physical_apicid != -1U) 189 ver = boot_cpu_apic_version; 190 191 cpu = generic_processor_info(id, ver); 192 if (cpu >= 0) 193 early_per_cpu(x86_cpu_to_acpiid, cpu) = acpiid; 194 195 return cpu; 196 } 197 198 static int __init 199 acpi_parse_x2apic(struct acpi_subtable_header *header, const unsigned long end) 200 { 201 struct acpi_madt_local_x2apic *processor = NULL; 202 #ifdef CONFIG_X86_X2APIC 203 u32 apic_id; 204 u8 enabled; 205 #endif 206 207 processor = (struct acpi_madt_local_x2apic *)header; 208 209 if (BAD_MADT_ENTRY(processor, end)) 210 return -EINVAL; 211 212 acpi_table_print_madt_entry(header); 213 214 #ifdef CONFIG_X86_X2APIC 215 apic_id = processor->local_apic_id; 216 enabled = processor->lapic_flags & ACPI_MADT_ENABLED; 217 218 /* 219 * We need to register disabled CPU as well to permit 220 * counting disabled CPUs. This allows us to size 221 * cpus_possible_map more accurately, to permit 222 * to not preallocating memory for all NR_CPUS 223 * when we use CPU hotplug. 224 */ 225 if (!apic->apic_id_valid(apic_id)) { 226 if (enabled) 227 pr_warn(PREFIX "x2apic entry ignored\n"); 228 return 0; 229 } 230 231 acpi_register_lapic(apic_id, processor->uid, enabled); 232 #else 233 printk(KERN_WARNING PREFIX "x2apic entry ignored\n"); 234 #endif 235 236 return 0; 237 } 238 239 static int __init 240 acpi_parse_lapic(struct acpi_subtable_header * header, const unsigned long end) 241 { 242 struct acpi_madt_local_apic *processor = NULL; 243 244 processor = (struct acpi_madt_local_apic *)header; 245 246 if (BAD_MADT_ENTRY(processor, end)) 247 return -EINVAL; 248 249 acpi_table_print_madt_entry(header); 250 251 /* Ignore invalid ID */ 252 if (processor->id == 0xff) 253 return 0; 254 255 /* 256 * We need to register disabled CPU as well to permit 257 * counting disabled CPUs. This allows us to size 258 * cpus_possible_map more accurately, to permit 259 * to not preallocating memory for all NR_CPUS 260 * when we use CPU hotplug. 261 */ 262 acpi_register_lapic(processor->id, /* APIC ID */ 263 processor->processor_id, /* ACPI ID */ 264 processor->lapic_flags & ACPI_MADT_ENABLED); 265 266 return 0; 267 } 268 269 static int __init 270 acpi_parse_sapic(struct acpi_subtable_header *header, const unsigned long end) 271 { 272 struct acpi_madt_local_sapic *processor = NULL; 273 274 processor = (struct acpi_madt_local_sapic *)header; 275 276 if (BAD_MADT_ENTRY(processor, end)) 277 return -EINVAL; 278 279 acpi_table_print_madt_entry(header); 280 281 acpi_register_lapic((processor->id << 8) | processor->eid,/* APIC ID */ 282 processor->processor_id, /* ACPI ID */ 283 processor->lapic_flags & ACPI_MADT_ENABLED); 284 285 return 0; 286 } 287 288 static int __init 289 acpi_parse_lapic_addr_ovr(struct acpi_subtable_header * header, 290 const unsigned long end) 291 { 292 struct acpi_madt_local_apic_override *lapic_addr_ovr = NULL; 293 294 lapic_addr_ovr = (struct acpi_madt_local_apic_override *)header; 295 296 if (BAD_MADT_ENTRY(lapic_addr_ovr, end)) 297 return -EINVAL; 298 299 acpi_table_print_madt_entry(header); 300 301 acpi_lapic_addr = lapic_addr_ovr->address; 302 303 return 0; 304 } 305 306 static int __init 307 acpi_parse_x2apic_nmi(struct acpi_subtable_header *header, 308 const unsigned long end) 309 { 310 struct acpi_madt_local_x2apic_nmi *x2apic_nmi = NULL; 311 312 x2apic_nmi = (struct acpi_madt_local_x2apic_nmi *)header; 313 314 if (BAD_MADT_ENTRY(x2apic_nmi, end)) 315 return -EINVAL; 316 317 acpi_table_print_madt_entry(header); 318 319 if (x2apic_nmi->lint != 1) 320 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n"); 321 322 return 0; 323 } 324 325 static int __init 326 acpi_parse_lapic_nmi(struct acpi_subtable_header * header, const unsigned long end) 327 { 328 struct acpi_madt_local_apic_nmi *lapic_nmi = NULL; 329 330 lapic_nmi = (struct acpi_madt_local_apic_nmi *)header; 331 332 if (BAD_MADT_ENTRY(lapic_nmi, end)) 333 return -EINVAL; 334 335 acpi_table_print_madt_entry(header); 336 337 if (lapic_nmi->lint != 1) 338 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n"); 339 340 return 0; 341 } 342 343 #endif /*CONFIG_X86_LOCAL_APIC */ 344 345 #ifdef CONFIG_X86_IO_APIC 346 #define MP_ISA_BUS 0 347 348 static int __init mp_register_ioapic_irq(u8 bus_irq, u8 polarity, 349 u8 trigger, u32 gsi); 350 351 static void __init mp_override_legacy_irq(u8 bus_irq, u8 polarity, u8 trigger, 352 u32 gsi) 353 { 354 /* 355 * Check bus_irq boundary. 356 */ 357 if (bus_irq >= NR_IRQS_LEGACY) { 358 pr_warn("Invalid bus_irq %u for legacy override\n", bus_irq); 359 return; 360 } 361 362 /* 363 * TBD: This check is for faulty timer entries, where the override 364 * erroneously sets the trigger to level, resulting in a HUGE 365 * increase of timer interrupts! 366 */ 367 if ((bus_irq == 0) && (trigger == 3)) 368 trigger = 1; 369 370 if (mp_register_ioapic_irq(bus_irq, polarity, trigger, gsi) < 0) 371 return; 372 /* 373 * Reset default identity mapping if gsi is also an legacy IRQ, 374 * otherwise there will be more than one entry with the same GSI 375 * and acpi_isa_irq_to_gsi() may give wrong result. 376 */ 377 if (gsi < nr_legacy_irqs() && isa_irq_to_gsi[gsi] == gsi) 378 isa_irq_to_gsi[gsi] = INVALID_ACPI_IRQ; 379 isa_irq_to_gsi[bus_irq] = gsi; 380 } 381 382 static int mp_config_acpi_gsi(struct device *dev, u32 gsi, int trigger, 383 int polarity) 384 { 385 #ifdef CONFIG_X86_MPPARSE 386 struct mpc_intsrc mp_irq; 387 struct pci_dev *pdev; 388 unsigned char number; 389 unsigned int devfn; 390 int ioapic; 391 u8 pin; 392 393 if (!acpi_ioapic) 394 return 0; 395 if (!dev || !dev_is_pci(dev)) 396 return 0; 397 398 pdev = to_pci_dev(dev); 399 number = pdev->bus->number; 400 devfn = pdev->devfn; 401 pin = pdev->pin; 402 /* print the entry should happen on mptable identically */ 403 mp_irq.type = MP_INTSRC; 404 mp_irq.irqtype = mp_INT; 405 mp_irq.irqflag = (trigger == ACPI_EDGE_SENSITIVE ? 4 : 0x0c) | 406 (polarity == ACPI_ACTIVE_HIGH ? 1 : 3); 407 mp_irq.srcbus = number; 408 mp_irq.srcbusirq = (((devfn >> 3) & 0x1f) << 2) | ((pin - 1) & 3); 409 ioapic = mp_find_ioapic(gsi); 410 mp_irq.dstapic = mpc_ioapic_id(ioapic); 411 mp_irq.dstirq = mp_find_ioapic_pin(ioapic, gsi); 412 413 mp_save_irq(&mp_irq); 414 #endif 415 return 0; 416 } 417 418 static int __init mp_register_ioapic_irq(u8 bus_irq, u8 polarity, 419 u8 trigger, u32 gsi) 420 { 421 struct mpc_intsrc mp_irq; 422 int ioapic, pin; 423 424 /* Convert 'gsi' to 'ioapic.pin'(INTIN#) */ 425 ioapic = mp_find_ioapic(gsi); 426 if (ioapic < 0) { 427 pr_warn("Failed to find ioapic for gsi : %u\n", gsi); 428 return ioapic; 429 } 430 431 pin = mp_find_ioapic_pin(ioapic, gsi); 432 433 mp_irq.type = MP_INTSRC; 434 mp_irq.irqtype = mp_INT; 435 mp_irq.irqflag = (trigger << 2) | polarity; 436 mp_irq.srcbus = MP_ISA_BUS; 437 mp_irq.srcbusirq = bus_irq; 438 mp_irq.dstapic = mpc_ioapic_id(ioapic); 439 mp_irq.dstirq = pin; 440 441 mp_save_irq(&mp_irq); 442 443 return 0; 444 } 445 446 static int __init 447 acpi_parse_ioapic(struct acpi_subtable_header * header, const unsigned long end) 448 { 449 struct acpi_madt_io_apic *ioapic = NULL; 450 struct ioapic_domain_cfg cfg = { 451 .type = IOAPIC_DOMAIN_DYNAMIC, 452 .ops = &mp_ioapic_irqdomain_ops, 453 }; 454 455 ioapic = (struct acpi_madt_io_apic *)header; 456 457 if (BAD_MADT_ENTRY(ioapic, end)) 458 return -EINVAL; 459 460 acpi_table_print_madt_entry(header); 461 462 /* Statically assign IRQ numbers for IOAPICs hosting legacy IRQs */ 463 if (ioapic->global_irq_base < nr_legacy_irqs()) 464 cfg.type = IOAPIC_DOMAIN_LEGACY; 465 466 mp_register_ioapic(ioapic->id, ioapic->address, ioapic->global_irq_base, 467 &cfg); 468 469 return 0; 470 } 471 472 /* 473 * Parse Interrupt Source Override for the ACPI SCI 474 */ 475 static void __init acpi_sci_ioapic_setup(u8 bus_irq, u16 polarity, u16 trigger, u32 gsi) 476 { 477 if (trigger == 0) /* compatible SCI trigger is level */ 478 trigger = 3; 479 480 if (polarity == 0) /* compatible SCI polarity is low */ 481 polarity = 3; 482 483 /* Command-line over-ride via acpi_sci= */ 484 if (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) 485 trigger = (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2; 486 487 if (acpi_sci_flags & ACPI_MADT_POLARITY_MASK) 488 polarity = acpi_sci_flags & ACPI_MADT_POLARITY_MASK; 489 490 if (bus_irq < NR_IRQS_LEGACY) 491 mp_override_legacy_irq(bus_irq, polarity, trigger, gsi); 492 else 493 mp_register_ioapic_irq(bus_irq, polarity, trigger, gsi); 494 495 acpi_penalize_sci_irq(bus_irq, trigger, polarity); 496 497 /* 498 * stash over-ride to indicate we've been here 499 * and for later update of acpi_gbl_FADT 500 */ 501 acpi_sci_override_gsi = gsi; 502 return; 503 } 504 505 static int __init 506 acpi_parse_int_src_ovr(struct acpi_subtable_header * header, 507 const unsigned long end) 508 { 509 struct acpi_madt_interrupt_override *intsrc = NULL; 510 511 intsrc = (struct acpi_madt_interrupt_override *)header; 512 513 if (BAD_MADT_ENTRY(intsrc, end)) 514 return -EINVAL; 515 516 acpi_table_print_madt_entry(header); 517 518 if (intsrc->source_irq == acpi_gbl_FADT.sci_interrupt) { 519 acpi_sci_ioapic_setup(intsrc->source_irq, 520 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK, 521 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2, 522 intsrc->global_irq); 523 return 0; 524 } 525 526 if (intsrc->source_irq == 0) { 527 if (acpi_skip_timer_override) { 528 printk(PREFIX "BIOS IRQ0 override ignored.\n"); 529 return 0; 530 } 531 532 if ((intsrc->global_irq == 2) && acpi_fix_pin2_polarity 533 && (intsrc->inti_flags & ACPI_MADT_POLARITY_MASK)) { 534 intsrc->inti_flags &= ~ACPI_MADT_POLARITY_MASK; 535 printk(PREFIX "BIOS IRQ0 pin2 override: forcing polarity to high active.\n"); 536 } 537 } 538 539 mp_override_legacy_irq(intsrc->source_irq, 540 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK, 541 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2, 542 intsrc->global_irq); 543 544 return 0; 545 } 546 547 static int __init 548 acpi_parse_nmi_src(struct acpi_subtable_header * header, const unsigned long end) 549 { 550 struct acpi_madt_nmi_source *nmi_src = NULL; 551 552 nmi_src = (struct acpi_madt_nmi_source *)header; 553 554 if (BAD_MADT_ENTRY(nmi_src, end)) 555 return -EINVAL; 556 557 acpi_table_print_madt_entry(header); 558 559 /* TBD: Support nimsrc entries? */ 560 561 return 0; 562 } 563 564 #endif /* CONFIG_X86_IO_APIC */ 565 566 /* 567 * acpi_pic_sci_set_trigger() 568 * 569 * use ELCR to set PIC-mode trigger type for SCI 570 * 571 * If a PIC-mode SCI is not recognized or gives spurious IRQ7's 572 * it may require Edge Trigger -- use "acpi_sci=edge" 573 * 574 * Port 0x4d0-4d1 are ECLR1 and ECLR2, the Edge/Level Control Registers 575 * for the 8259 PIC. bit[n] = 1 means irq[n] is Level, otherwise Edge. 576 * ECLR1 is IRQs 0-7 (IRQ 0, 1, 2 must be 0) 577 * ECLR2 is IRQs 8-15 (IRQ 8, 13 must be 0) 578 */ 579 580 void __init acpi_pic_sci_set_trigger(unsigned int irq, u16 trigger) 581 { 582 unsigned int mask = 1 << irq; 583 unsigned int old, new; 584 585 /* Real old ELCR mask */ 586 old = inb(0x4d0) | (inb(0x4d1) << 8); 587 588 /* 589 * If we use ACPI to set PCI IRQs, then we should clear ELCR 590 * since we will set it correctly as we enable the PCI irq 591 * routing. 592 */ 593 new = acpi_noirq ? old : 0; 594 595 /* 596 * Update SCI information in the ELCR, it isn't in the PCI 597 * routing tables.. 598 */ 599 switch (trigger) { 600 case 1: /* Edge - clear */ 601 new &= ~mask; 602 break; 603 case 3: /* Level - set */ 604 new |= mask; 605 break; 606 } 607 608 if (old == new) 609 return; 610 611 printk(PREFIX "setting ELCR to %04x (from %04x)\n", new, old); 612 outb(new, 0x4d0); 613 outb(new >> 8, 0x4d1); 614 } 615 616 int acpi_gsi_to_irq(u32 gsi, unsigned int *irqp) 617 { 618 int rc, irq, trigger, polarity; 619 620 if (acpi_irq_model == ACPI_IRQ_MODEL_PIC) { 621 *irqp = gsi; 622 return 0; 623 } 624 625 rc = acpi_get_override_irq(gsi, &trigger, &polarity); 626 if (rc) 627 return rc; 628 629 trigger = trigger ? ACPI_LEVEL_SENSITIVE : ACPI_EDGE_SENSITIVE; 630 polarity = polarity ? ACPI_ACTIVE_LOW : ACPI_ACTIVE_HIGH; 631 irq = acpi_register_gsi(NULL, gsi, trigger, polarity); 632 if (irq < 0) 633 return irq; 634 635 *irqp = irq; 636 return 0; 637 } 638 EXPORT_SYMBOL_GPL(acpi_gsi_to_irq); 639 640 int acpi_isa_irq_to_gsi(unsigned isa_irq, u32 *gsi) 641 { 642 if (isa_irq < nr_legacy_irqs() && 643 isa_irq_to_gsi[isa_irq] != INVALID_ACPI_IRQ) { 644 *gsi = isa_irq_to_gsi[isa_irq]; 645 return 0; 646 } 647 648 return -1; 649 } 650 651 static int acpi_register_gsi_pic(struct device *dev, u32 gsi, 652 int trigger, int polarity) 653 { 654 #ifdef CONFIG_PCI 655 /* 656 * Make sure all (legacy) PCI IRQs are set as level-triggered. 657 */ 658 if (trigger == ACPI_LEVEL_SENSITIVE) 659 elcr_set_level_irq(gsi); 660 #endif 661 662 return gsi; 663 } 664 665 #ifdef CONFIG_X86_LOCAL_APIC 666 static int acpi_register_gsi_ioapic(struct device *dev, u32 gsi, 667 int trigger, int polarity) 668 { 669 int irq = gsi; 670 #ifdef CONFIG_X86_IO_APIC 671 int node; 672 struct irq_alloc_info info; 673 674 node = dev ? dev_to_node(dev) : NUMA_NO_NODE; 675 trigger = trigger == ACPI_EDGE_SENSITIVE ? 0 : 1; 676 polarity = polarity == ACPI_ACTIVE_HIGH ? 0 : 1; 677 ioapic_set_alloc_attr(&info, node, trigger, polarity); 678 679 mutex_lock(&acpi_ioapic_lock); 680 irq = mp_map_gsi_to_irq(gsi, IOAPIC_MAP_ALLOC, &info); 681 /* Don't set up the ACPI SCI because it's already set up */ 682 if (irq >= 0 && enable_update_mptable && gsi != acpi_gbl_FADT.sci_interrupt) 683 mp_config_acpi_gsi(dev, gsi, trigger, polarity); 684 mutex_unlock(&acpi_ioapic_lock); 685 #endif 686 687 return irq; 688 } 689 690 static void acpi_unregister_gsi_ioapic(u32 gsi) 691 { 692 #ifdef CONFIG_X86_IO_APIC 693 int irq; 694 695 mutex_lock(&acpi_ioapic_lock); 696 irq = mp_map_gsi_to_irq(gsi, 0, NULL); 697 if (irq > 0) 698 mp_unmap_irq(irq); 699 mutex_unlock(&acpi_ioapic_lock); 700 #endif 701 } 702 #endif 703 704 int (*__acpi_register_gsi)(struct device *dev, u32 gsi, 705 int trigger, int polarity) = acpi_register_gsi_pic; 706 void (*__acpi_unregister_gsi)(u32 gsi) = NULL; 707 708 #ifdef CONFIG_ACPI_SLEEP 709 int (*acpi_suspend_lowlevel)(void) = x86_acpi_suspend_lowlevel; 710 #else 711 int (*acpi_suspend_lowlevel)(void); 712 #endif 713 714 /* 715 * success: return IRQ number (>=0) 716 * failure: return < 0 717 */ 718 int acpi_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity) 719 { 720 return __acpi_register_gsi(dev, gsi, trigger, polarity); 721 } 722 EXPORT_SYMBOL_GPL(acpi_register_gsi); 723 724 void acpi_unregister_gsi(u32 gsi) 725 { 726 if (__acpi_unregister_gsi) 727 __acpi_unregister_gsi(gsi); 728 } 729 EXPORT_SYMBOL_GPL(acpi_unregister_gsi); 730 731 #ifdef CONFIG_X86_LOCAL_APIC 732 static void __init acpi_set_irq_model_ioapic(void) 733 { 734 acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC; 735 __acpi_register_gsi = acpi_register_gsi_ioapic; 736 __acpi_unregister_gsi = acpi_unregister_gsi_ioapic; 737 acpi_ioapic = 1; 738 } 739 #endif 740 741 /* 742 * ACPI based hotplug support for CPU 743 */ 744 #ifdef CONFIG_ACPI_HOTPLUG_CPU 745 #include <acpi/processor.h> 746 747 static int acpi_map_cpu2node(acpi_handle handle, int cpu, int physid) 748 { 749 #ifdef CONFIG_ACPI_NUMA 750 int nid; 751 752 nid = acpi_get_node(handle); 753 if (nid != NUMA_NO_NODE) { 754 set_apicid_to_node(physid, nid); 755 numa_set_node(cpu, nid); 756 } 757 #endif 758 return 0; 759 } 760 761 int acpi_map_cpu(acpi_handle handle, phys_cpuid_t physid, u32 acpi_id, 762 int *pcpu) 763 { 764 int cpu; 765 766 cpu = acpi_register_lapic(physid, acpi_id, ACPI_MADT_ENABLED); 767 if (cpu < 0) { 768 pr_info(PREFIX "Unable to map lapic to logical cpu number\n"); 769 return cpu; 770 } 771 772 acpi_processor_set_pdc(handle); 773 acpi_map_cpu2node(handle, cpu, physid); 774 775 *pcpu = cpu; 776 return 0; 777 } 778 EXPORT_SYMBOL(acpi_map_cpu); 779 780 int acpi_unmap_cpu(int cpu) 781 { 782 #ifdef CONFIG_ACPI_NUMA 783 set_apicid_to_node(per_cpu(x86_cpu_to_apicid, cpu), NUMA_NO_NODE); 784 #endif 785 786 per_cpu(x86_cpu_to_apicid, cpu) = -1; 787 set_cpu_present(cpu, false); 788 num_processors--; 789 790 return (0); 791 } 792 EXPORT_SYMBOL(acpi_unmap_cpu); 793 #endif /* CONFIG_ACPI_HOTPLUG_CPU */ 794 795 int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base) 796 { 797 int ret = -ENOSYS; 798 #ifdef CONFIG_ACPI_HOTPLUG_IOAPIC 799 int ioapic_id; 800 u64 addr; 801 struct ioapic_domain_cfg cfg = { 802 .type = IOAPIC_DOMAIN_DYNAMIC, 803 .ops = &mp_ioapic_irqdomain_ops, 804 }; 805 806 ioapic_id = acpi_get_ioapic_id(handle, gsi_base, &addr); 807 if (ioapic_id < 0) { 808 unsigned long long uid; 809 acpi_status status; 810 811 status = acpi_evaluate_integer(handle, METHOD_NAME__UID, 812 NULL, &uid); 813 if (ACPI_FAILURE(status)) { 814 acpi_handle_warn(handle, "failed to get IOAPIC ID.\n"); 815 return -EINVAL; 816 } 817 ioapic_id = (int)uid; 818 } 819 820 mutex_lock(&acpi_ioapic_lock); 821 ret = mp_register_ioapic(ioapic_id, phys_addr, gsi_base, &cfg); 822 mutex_unlock(&acpi_ioapic_lock); 823 #endif 824 825 return ret; 826 } 827 EXPORT_SYMBOL(acpi_register_ioapic); 828 829 int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base) 830 { 831 int ret = -ENOSYS; 832 833 #ifdef CONFIG_ACPI_HOTPLUG_IOAPIC 834 mutex_lock(&acpi_ioapic_lock); 835 ret = mp_unregister_ioapic(gsi_base); 836 mutex_unlock(&acpi_ioapic_lock); 837 #endif 838 839 return ret; 840 } 841 EXPORT_SYMBOL(acpi_unregister_ioapic); 842 843 /** 844 * acpi_ioapic_registered - Check whether IOAPIC assoicatied with @gsi_base 845 * has been registered 846 * @handle: ACPI handle of the IOAPIC deivce 847 * @gsi_base: GSI base associated with the IOAPIC 848 * 849 * Assume caller holds some type of lock to serialize acpi_ioapic_registered() 850 * with acpi_register_ioapic()/acpi_unregister_ioapic(). 851 */ 852 int acpi_ioapic_registered(acpi_handle handle, u32 gsi_base) 853 { 854 int ret = 0; 855 856 #ifdef CONFIG_ACPI_HOTPLUG_IOAPIC 857 mutex_lock(&acpi_ioapic_lock); 858 ret = mp_ioapic_registered(gsi_base); 859 mutex_unlock(&acpi_ioapic_lock); 860 #endif 861 862 return ret; 863 } 864 865 static int __init acpi_parse_sbf(struct acpi_table_header *table) 866 { 867 struct acpi_table_boot *sb = (struct acpi_table_boot *)table; 868 869 sbf_port = sb->cmos_index; /* Save CMOS port */ 870 871 return 0; 872 } 873 874 #ifdef CONFIG_HPET_TIMER 875 #include <asm/hpet.h> 876 877 static struct resource *hpet_res __initdata; 878 879 static int __init acpi_parse_hpet(struct acpi_table_header *table) 880 { 881 struct acpi_table_hpet *hpet_tbl = (struct acpi_table_hpet *)table; 882 883 if (hpet_tbl->address.space_id != ACPI_SPACE_MEM) { 884 printk(KERN_WARNING PREFIX "HPET timers must be located in " 885 "memory.\n"); 886 return -1; 887 } 888 889 hpet_address = hpet_tbl->address.address; 890 hpet_blockid = hpet_tbl->sequence; 891 892 /* 893 * Some broken BIOSes advertise HPET at 0x0. We really do not 894 * want to allocate a resource there. 895 */ 896 if (!hpet_address) { 897 printk(KERN_WARNING PREFIX 898 "HPET id: %#x base: %#lx is invalid\n", 899 hpet_tbl->id, hpet_address); 900 return 0; 901 } 902 #ifdef CONFIG_X86_64 903 /* 904 * Some even more broken BIOSes advertise HPET at 905 * 0xfed0000000000000 instead of 0xfed00000. Fix it up and add 906 * some noise: 907 */ 908 if (hpet_address == 0xfed0000000000000UL) { 909 if (!hpet_force_user) { 910 printk(KERN_WARNING PREFIX "HPET id: %#x " 911 "base: 0xfed0000000000000 is bogus\n " 912 "try hpet=force on the kernel command line to " 913 "fix it up to 0xfed00000.\n", hpet_tbl->id); 914 hpet_address = 0; 915 return 0; 916 } 917 printk(KERN_WARNING PREFIX 918 "HPET id: %#x base: 0xfed0000000000000 fixed up " 919 "to 0xfed00000.\n", hpet_tbl->id); 920 hpet_address >>= 32; 921 } 922 #endif 923 printk(KERN_INFO PREFIX "HPET id: %#x base: %#lx\n", 924 hpet_tbl->id, hpet_address); 925 926 /* 927 * Allocate and initialize the HPET firmware resource for adding into 928 * the resource tree during the lateinit timeframe. 929 */ 930 #define HPET_RESOURCE_NAME_SIZE 9 931 hpet_res = alloc_bootmem(sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE); 932 933 hpet_res->name = (void *)&hpet_res[1]; 934 hpet_res->flags = IORESOURCE_MEM; 935 snprintf((char *)hpet_res->name, HPET_RESOURCE_NAME_SIZE, "HPET %u", 936 hpet_tbl->sequence); 937 938 hpet_res->start = hpet_address; 939 hpet_res->end = hpet_address + (1 * 1024) - 1; 940 941 return 0; 942 } 943 944 /* 945 * hpet_insert_resource inserts the HPET resources used into the resource 946 * tree. 947 */ 948 static __init int hpet_insert_resource(void) 949 { 950 if (!hpet_res) 951 return 1; 952 953 return insert_resource(&iomem_resource, hpet_res); 954 } 955 956 late_initcall(hpet_insert_resource); 957 958 #else 959 #define acpi_parse_hpet NULL 960 #endif 961 962 static int __init acpi_parse_fadt(struct acpi_table_header *table) 963 { 964 if (!(acpi_gbl_FADT.boot_flags & ACPI_FADT_LEGACY_DEVICES)) { 965 pr_debug("ACPI: no legacy devices present\n"); 966 x86_platform.legacy.devices.pnpbios = 0; 967 } 968 969 if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID && 970 !(acpi_gbl_FADT.boot_flags & ACPI_FADT_8042) && 971 x86_platform.legacy.i8042 != X86_LEGACY_I8042_PLATFORM_ABSENT) { 972 pr_debug("ACPI: i8042 controller is absent\n"); 973 x86_platform.legacy.i8042 = X86_LEGACY_I8042_FIRMWARE_ABSENT; 974 } 975 976 if (acpi_gbl_FADT.boot_flags & ACPI_FADT_NO_CMOS_RTC) { 977 pr_debug("ACPI: not registering RTC platform device\n"); 978 x86_platform.legacy.rtc = 0; 979 } 980 981 if (acpi_gbl_FADT.boot_flags & ACPI_FADT_NO_VGA) { 982 pr_debug("ACPI: probing for VGA not safe\n"); 983 x86_platform.legacy.no_vga = 1; 984 } 985 986 #ifdef CONFIG_X86_PM_TIMER 987 /* detect the location of the ACPI PM Timer */ 988 if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID) { 989 /* FADT rev. 2 */ 990 if (acpi_gbl_FADT.xpm_timer_block.space_id != 991 ACPI_ADR_SPACE_SYSTEM_IO) 992 return 0; 993 994 pmtmr_ioport = acpi_gbl_FADT.xpm_timer_block.address; 995 /* 996 * "X" fields are optional extensions to the original V1.0 997 * fields, so we must selectively expand V1.0 fields if the 998 * corresponding X field is zero. 999 */ 1000 if (!pmtmr_ioport) 1001 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block; 1002 } else { 1003 /* FADT rev. 1 */ 1004 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block; 1005 } 1006 if (pmtmr_ioport) 1007 printk(KERN_INFO PREFIX "PM-Timer IO Port: %#x\n", 1008 pmtmr_ioport); 1009 #endif 1010 return 0; 1011 } 1012 1013 #ifdef CONFIG_X86_LOCAL_APIC 1014 /* 1015 * Parse LAPIC entries in MADT 1016 * returns 0 on success, < 0 on error 1017 */ 1018 1019 static int __init early_acpi_parse_madt_lapic_addr_ovr(void) 1020 { 1021 int count; 1022 1023 if (!boot_cpu_has(X86_FEATURE_APIC)) 1024 return -ENODEV; 1025 1026 /* 1027 * Note that the LAPIC address is obtained from the MADT (32-bit value) 1028 * and (optionally) overridden by a LAPIC_ADDR_OVR entry (64-bit value). 1029 */ 1030 1031 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE, 1032 acpi_parse_lapic_addr_ovr, 0); 1033 if (count < 0) { 1034 printk(KERN_ERR PREFIX 1035 "Error parsing LAPIC address override entry\n"); 1036 return count; 1037 } 1038 1039 register_lapic_address(acpi_lapic_addr); 1040 1041 return count; 1042 } 1043 1044 static int __init acpi_parse_madt_lapic_entries(void) 1045 { 1046 int count; 1047 int x2count = 0; 1048 int ret; 1049 struct acpi_subtable_proc madt_proc[2]; 1050 1051 if (!boot_cpu_has(X86_FEATURE_APIC)) 1052 return -ENODEV; 1053 1054 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC, 1055 acpi_parse_sapic, MAX_LOCAL_APIC); 1056 1057 if (!count) { 1058 memset(madt_proc, 0, sizeof(madt_proc)); 1059 madt_proc[0].id = ACPI_MADT_TYPE_LOCAL_APIC; 1060 madt_proc[0].handler = acpi_parse_lapic; 1061 madt_proc[1].id = ACPI_MADT_TYPE_LOCAL_X2APIC; 1062 madt_proc[1].handler = acpi_parse_x2apic; 1063 ret = acpi_table_parse_entries_array(ACPI_SIG_MADT, 1064 sizeof(struct acpi_table_madt), 1065 madt_proc, ARRAY_SIZE(madt_proc), MAX_LOCAL_APIC); 1066 if (ret < 0) { 1067 printk(KERN_ERR PREFIX 1068 "Error parsing LAPIC/X2APIC entries\n"); 1069 return ret; 1070 } 1071 1072 count = madt_proc[0].count; 1073 x2count = madt_proc[1].count; 1074 } 1075 if (!count && !x2count) { 1076 printk(KERN_ERR PREFIX "No LAPIC entries present\n"); 1077 /* TBD: Cleanup to allow fallback to MPS */ 1078 return -ENODEV; 1079 } else if (count < 0 || x2count < 0) { 1080 printk(KERN_ERR PREFIX "Error parsing LAPIC entry\n"); 1081 /* TBD: Cleanup to allow fallback to MPS */ 1082 return count; 1083 } 1084 1085 x2count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC_NMI, 1086 acpi_parse_x2apic_nmi, 0); 1087 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI, 1088 acpi_parse_lapic_nmi, 0); 1089 if (count < 0 || x2count < 0) { 1090 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n"); 1091 /* TBD: Cleanup to allow fallback to MPS */ 1092 return count; 1093 } 1094 return 0; 1095 } 1096 #endif /* CONFIG_X86_LOCAL_APIC */ 1097 1098 #ifdef CONFIG_X86_IO_APIC 1099 static void __init mp_config_acpi_legacy_irqs(void) 1100 { 1101 int i; 1102 struct mpc_intsrc mp_irq; 1103 1104 #ifdef CONFIG_EISA 1105 /* 1106 * Fabricate the legacy ISA bus (bus #31). 1107 */ 1108 mp_bus_id_to_type[MP_ISA_BUS] = MP_BUS_ISA; 1109 #endif 1110 set_bit(MP_ISA_BUS, mp_bus_not_pci); 1111 pr_debug("Bus #%d is ISA (nIRQs: %d)\n", MP_ISA_BUS, nr_legacy_irqs()); 1112 1113 /* 1114 * Use the default configuration for the IRQs 0-15. Unless 1115 * overridden by (MADT) interrupt source override entries. 1116 */ 1117 for (i = 0; i < nr_legacy_irqs(); i++) { 1118 int ioapic, pin; 1119 unsigned int dstapic; 1120 int idx; 1121 u32 gsi; 1122 1123 /* Locate the gsi that irq i maps to. */ 1124 if (acpi_isa_irq_to_gsi(i, &gsi)) 1125 continue; 1126 1127 /* 1128 * Locate the IOAPIC that manages the ISA IRQ. 1129 */ 1130 ioapic = mp_find_ioapic(gsi); 1131 if (ioapic < 0) 1132 continue; 1133 pin = mp_find_ioapic_pin(ioapic, gsi); 1134 dstapic = mpc_ioapic_id(ioapic); 1135 1136 for (idx = 0; idx < mp_irq_entries; idx++) { 1137 struct mpc_intsrc *irq = mp_irqs + idx; 1138 1139 /* Do we already have a mapping for this ISA IRQ? */ 1140 if (irq->srcbus == MP_ISA_BUS && irq->srcbusirq == i) 1141 break; 1142 1143 /* Do we already have a mapping for this IOAPIC pin */ 1144 if (irq->dstapic == dstapic && irq->dstirq == pin) 1145 break; 1146 } 1147 1148 if (idx != mp_irq_entries) { 1149 printk(KERN_DEBUG "ACPI: IRQ%d used by override.\n", i); 1150 continue; /* IRQ already used */ 1151 } 1152 1153 mp_irq.type = MP_INTSRC; 1154 mp_irq.irqflag = 0; /* Conforming */ 1155 mp_irq.srcbus = MP_ISA_BUS; 1156 mp_irq.dstapic = dstapic; 1157 mp_irq.irqtype = mp_INT; 1158 mp_irq.srcbusirq = i; /* Identity mapped */ 1159 mp_irq.dstirq = pin; 1160 1161 mp_save_irq(&mp_irq); 1162 } 1163 } 1164 1165 /* 1166 * Parse IOAPIC related entries in MADT 1167 * returns 0 on success, < 0 on error 1168 */ 1169 static int __init acpi_parse_madt_ioapic_entries(void) 1170 { 1171 int count; 1172 1173 /* 1174 * ACPI interpreter is required to complete interrupt setup, 1175 * so if it is off, don't enumerate the io-apics with ACPI. 1176 * If MPS is present, it will handle them, 1177 * otherwise the system will stay in PIC mode 1178 */ 1179 if (acpi_disabled || acpi_noirq) 1180 return -ENODEV; 1181 1182 if (!boot_cpu_has(X86_FEATURE_APIC)) 1183 return -ENODEV; 1184 1185 /* 1186 * if "noapic" boot option, don't look for IO-APICs 1187 */ 1188 if (skip_ioapic_setup) { 1189 printk(KERN_INFO PREFIX "Skipping IOAPIC probe " 1190 "due to 'noapic' option.\n"); 1191 return -ENODEV; 1192 } 1193 1194 count = acpi_table_parse_madt(ACPI_MADT_TYPE_IO_APIC, acpi_parse_ioapic, 1195 MAX_IO_APICS); 1196 if (!count) { 1197 printk(KERN_ERR PREFIX "No IOAPIC entries present\n"); 1198 return -ENODEV; 1199 } else if (count < 0) { 1200 printk(KERN_ERR PREFIX "Error parsing IOAPIC entry\n"); 1201 return count; 1202 } 1203 1204 count = acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE, 1205 acpi_parse_int_src_ovr, nr_irqs); 1206 if (count < 0) { 1207 printk(KERN_ERR PREFIX 1208 "Error parsing interrupt source overrides entry\n"); 1209 /* TBD: Cleanup to allow fallback to MPS */ 1210 return count; 1211 } 1212 1213 /* 1214 * If BIOS did not supply an INT_SRC_OVR for the SCI 1215 * pretend we got one so we can set the SCI flags. 1216 * But ignore setting up SCI on hardware reduced platforms. 1217 */ 1218 if (acpi_sci_override_gsi == INVALID_ACPI_IRQ && !acpi_gbl_reduced_hardware) 1219 acpi_sci_ioapic_setup(acpi_gbl_FADT.sci_interrupt, 0, 0, 1220 acpi_gbl_FADT.sci_interrupt); 1221 1222 /* Fill in identity legacy mappings where no override */ 1223 mp_config_acpi_legacy_irqs(); 1224 1225 count = acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE, 1226 acpi_parse_nmi_src, nr_irqs); 1227 if (count < 0) { 1228 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n"); 1229 /* TBD: Cleanup to allow fallback to MPS */ 1230 return count; 1231 } 1232 1233 return 0; 1234 } 1235 #else 1236 static inline int acpi_parse_madt_ioapic_entries(void) 1237 { 1238 return -1; 1239 } 1240 #endif /* !CONFIG_X86_IO_APIC */ 1241 1242 static void __init early_acpi_process_madt(void) 1243 { 1244 #ifdef CONFIG_X86_LOCAL_APIC 1245 int error; 1246 1247 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) { 1248 1249 /* 1250 * Parse MADT LAPIC entries 1251 */ 1252 error = early_acpi_parse_madt_lapic_addr_ovr(); 1253 if (!error) { 1254 acpi_lapic = 1; 1255 smp_found_config = 1; 1256 } 1257 if (error == -EINVAL) { 1258 /* 1259 * Dell Precision Workstation 410, 610 come here. 1260 */ 1261 printk(KERN_ERR PREFIX 1262 "Invalid BIOS MADT, disabling ACPI\n"); 1263 disable_acpi(); 1264 } 1265 } 1266 #endif 1267 } 1268 1269 static void __init acpi_process_madt(void) 1270 { 1271 #ifdef CONFIG_X86_LOCAL_APIC 1272 int error; 1273 1274 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) { 1275 1276 /* 1277 * Parse MADT LAPIC entries 1278 */ 1279 error = acpi_parse_madt_lapic_entries(); 1280 if (!error) { 1281 acpi_lapic = 1; 1282 1283 /* 1284 * Parse MADT IO-APIC entries 1285 */ 1286 mutex_lock(&acpi_ioapic_lock); 1287 error = acpi_parse_madt_ioapic_entries(); 1288 mutex_unlock(&acpi_ioapic_lock); 1289 if (!error) { 1290 acpi_set_irq_model_ioapic(); 1291 1292 smp_found_config = 1; 1293 } 1294 } 1295 if (error == -EINVAL) { 1296 /* 1297 * Dell Precision Workstation 410, 610 come here. 1298 */ 1299 printk(KERN_ERR PREFIX 1300 "Invalid BIOS MADT, disabling ACPI\n"); 1301 disable_acpi(); 1302 } 1303 } else { 1304 /* 1305 * ACPI found no MADT, and so ACPI wants UP PIC mode. 1306 * In the event an MPS table was found, forget it. 1307 * Boot with "acpi=off" to use MPS on such a system. 1308 */ 1309 if (smp_found_config) { 1310 printk(KERN_WARNING PREFIX 1311 "No APIC-table, disabling MPS\n"); 1312 smp_found_config = 0; 1313 } 1314 } 1315 1316 /* 1317 * ACPI supports both logical (e.g. Hyper-Threading) and physical 1318 * processors, where MPS only supports physical. 1319 */ 1320 if (acpi_lapic && acpi_ioapic) 1321 printk(KERN_INFO "Using ACPI (MADT) for SMP configuration " 1322 "information\n"); 1323 else if (acpi_lapic) 1324 printk(KERN_INFO "Using ACPI for processor (LAPIC) " 1325 "configuration information\n"); 1326 #endif 1327 return; 1328 } 1329 1330 static int __init disable_acpi_irq(const struct dmi_system_id *d) 1331 { 1332 if (!acpi_force) { 1333 printk(KERN_NOTICE "%s detected: force use of acpi=noirq\n", 1334 d->ident); 1335 acpi_noirq_set(); 1336 } 1337 return 0; 1338 } 1339 1340 static int __init disable_acpi_pci(const struct dmi_system_id *d) 1341 { 1342 if (!acpi_force) { 1343 printk(KERN_NOTICE "%s detected: force use of pci=noacpi\n", 1344 d->ident); 1345 acpi_disable_pci(); 1346 } 1347 return 0; 1348 } 1349 1350 static int __init dmi_disable_acpi(const struct dmi_system_id *d) 1351 { 1352 if (!acpi_force) { 1353 printk(KERN_NOTICE "%s detected: acpi off\n", d->ident); 1354 disable_acpi(); 1355 } else { 1356 printk(KERN_NOTICE 1357 "Warning: DMI blacklist says broken, but acpi forced\n"); 1358 } 1359 return 0; 1360 } 1361 1362 /* 1363 * Force ignoring BIOS IRQ0 override 1364 */ 1365 static int __init dmi_ignore_irq0_timer_override(const struct dmi_system_id *d) 1366 { 1367 if (!acpi_skip_timer_override) { 1368 pr_notice("%s detected: Ignoring BIOS IRQ0 override\n", 1369 d->ident); 1370 acpi_skip_timer_override = 1; 1371 } 1372 return 0; 1373 } 1374 1375 /* 1376 * ACPI offers an alternative platform interface model that removes 1377 * ACPI hardware requirements for platforms that do not implement 1378 * the PC Architecture. 1379 * 1380 * We initialize the Hardware-reduced ACPI model here: 1381 */ 1382 void __init acpi_generic_reduced_hw_init(void) 1383 { 1384 /* 1385 * Override x86_init functions and bypass legacy PIC in 1386 * hardware reduced ACPI mode. 1387 */ 1388 x86_init.timers.timer_init = x86_init_noop; 1389 x86_init.irqs.pre_vector_init = x86_init_noop; 1390 legacy_pic = &null_legacy_pic; 1391 } 1392 1393 static void __init acpi_reduced_hw_init(void) 1394 { 1395 if (acpi_gbl_reduced_hardware) 1396 x86_init.acpi.reduced_hw_early_init(); 1397 } 1398 1399 /* 1400 * If your system is blacklisted here, but you find that acpi=force 1401 * works for you, please contact linux-acpi@vger.kernel.org 1402 */ 1403 static const struct dmi_system_id acpi_dmi_table[] __initconst = { 1404 /* 1405 * Boxes that need ACPI disabled 1406 */ 1407 { 1408 .callback = dmi_disable_acpi, 1409 .ident = "IBM Thinkpad", 1410 .matches = { 1411 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), 1412 DMI_MATCH(DMI_BOARD_NAME, "2629H1G"), 1413 }, 1414 }, 1415 1416 /* 1417 * Boxes that need ACPI PCI IRQ routing disabled 1418 */ 1419 { 1420 .callback = disable_acpi_irq, 1421 .ident = "ASUS A7V", 1422 .matches = { 1423 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC"), 1424 DMI_MATCH(DMI_BOARD_NAME, "<A7V>"), 1425 /* newer BIOS, Revision 1011, does work */ 1426 DMI_MATCH(DMI_BIOS_VERSION, 1427 "ASUS A7V ACPI BIOS Revision 1007"), 1428 }, 1429 }, 1430 { 1431 /* 1432 * Latest BIOS for IBM 600E (1.16) has bad pcinum 1433 * for LPC bridge, which is needed for the PCI 1434 * interrupt links to work. DSDT fix is in bug 5966. 1435 * 2645, 2646 model numbers are shared with 600/600E/600X 1436 */ 1437 .callback = disable_acpi_irq, 1438 .ident = "IBM Thinkpad 600 Series 2645", 1439 .matches = { 1440 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), 1441 DMI_MATCH(DMI_BOARD_NAME, "2645"), 1442 }, 1443 }, 1444 { 1445 .callback = disable_acpi_irq, 1446 .ident = "IBM Thinkpad 600 Series 2646", 1447 .matches = { 1448 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), 1449 DMI_MATCH(DMI_BOARD_NAME, "2646"), 1450 }, 1451 }, 1452 /* 1453 * Boxes that need ACPI PCI IRQ routing and PCI scan disabled 1454 */ 1455 { /* _BBN 0 bug */ 1456 .callback = disable_acpi_pci, 1457 .ident = "ASUS PR-DLS", 1458 .matches = { 1459 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."), 1460 DMI_MATCH(DMI_BOARD_NAME, "PR-DLS"), 1461 DMI_MATCH(DMI_BIOS_VERSION, 1462 "ASUS PR-DLS ACPI BIOS Revision 1010"), 1463 DMI_MATCH(DMI_BIOS_DATE, "03/21/2003") 1464 }, 1465 }, 1466 { 1467 .callback = disable_acpi_pci, 1468 .ident = "Acer TravelMate 36x Laptop", 1469 .matches = { 1470 DMI_MATCH(DMI_SYS_VENDOR, "Acer"), 1471 DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"), 1472 }, 1473 }, 1474 {} 1475 }; 1476 1477 /* second table for DMI checks that should run after early-quirks */ 1478 static const struct dmi_system_id acpi_dmi_table_late[] __initconst = { 1479 /* 1480 * HP laptops which use a DSDT reporting as HP/SB400/10000, 1481 * which includes some code which overrides all temperature 1482 * trip points to 16C if the INTIN2 input of the I/O APIC 1483 * is enabled. This input is incorrectly designated the 1484 * ISA IRQ 0 via an interrupt source override even though 1485 * it is wired to the output of the master 8259A and INTIN0 1486 * is not connected at all. Force ignoring BIOS IRQ0 1487 * override in that cases. 1488 */ 1489 { 1490 .callback = dmi_ignore_irq0_timer_override, 1491 .ident = "HP nx6115 laptop", 1492 .matches = { 1493 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 1494 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6115"), 1495 }, 1496 }, 1497 { 1498 .callback = dmi_ignore_irq0_timer_override, 1499 .ident = "HP NX6125 laptop", 1500 .matches = { 1501 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 1502 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6125"), 1503 }, 1504 }, 1505 { 1506 .callback = dmi_ignore_irq0_timer_override, 1507 .ident = "HP NX6325 laptop", 1508 .matches = { 1509 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 1510 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6325"), 1511 }, 1512 }, 1513 { 1514 .callback = dmi_ignore_irq0_timer_override, 1515 .ident = "HP 6715b laptop", 1516 .matches = { 1517 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 1518 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq 6715b"), 1519 }, 1520 }, 1521 { 1522 .callback = dmi_ignore_irq0_timer_override, 1523 .ident = "FUJITSU SIEMENS", 1524 .matches = { 1525 DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"), 1526 DMI_MATCH(DMI_PRODUCT_NAME, "AMILO PRO V2030"), 1527 }, 1528 }, 1529 {} 1530 }; 1531 1532 /* 1533 * acpi_boot_table_init() and acpi_boot_init() 1534 * called from setup_arch(), always. 1535 * 1. checksums all tables 1536 * 2. enumerates lapics 1537 * 3. enumerates io-apics 1538 * 1539 * acpi_table_init() is separate to allow reading SRAT without 1540 * other side effects. 1541 * 1542 * side effects of acpi_boot_init: 1543 * acpi_lapic = 1 if LAPIC found 1544 * acpi_ioapic = 1 if IOAPIC found 1545 * if (acpi_lapic && acpi_ioapic) smp_found_config = 1; 1546 * if acpi_blacklisted() acpi_disabled = 1; 1547 * acpi_irq_model=... 1548 * ... 1549 */ 1550 1551 void __init acpi_boot_table_init(void) 1552 { 1553 dmi_check_system(acpi_dmi_table); 1554 1555 /* 1556 * If acpi_disabled, bail out 1557 */ 1558 if (acpi_disabled) 1559 return; 1560 1561 /* 1562 * Initialize the ACPI boot-time table parser. 1563 */ 1564 if (acpi_table_init()) { 1565 disable_acpi(); 1566 return; 1567 } 1568 1569 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf); 1570 1571 /* 1572 * blacklist may disable ACPI entirely 1573 */ 1574 if (acpi_blacklisted()) { 1575 if (acpi_force) { 1576 printk(KERN_WARNING PREFIX "acpi=force override\n"); 1577 } else { 1578 printk(KERN_WARNING PREFIX "Disabling ACPI support\n"); 1579 disable_acpi(); 1580 return; 1581 } 1582 } 1583 } 1584 1585 int __init early_acpi_boot_init(void) 1586 { 1587 /* 1588 * If acpi_disabled, bail out 1589 */ 1590 if (acpi_disabled) 1591 return 1; 1592 1593 /* 1594 * Process the Multiple APIC Description Table (MADT), if present 1595 */ 1596 early_acpi_process_madt(); 1597 1598 /* 1599 * Hardware-reduced ACPI mode initialization: 1600 */ 1601 acpi_reduced_hw_init(); 1602 1603 return 0; 1604 } 1605 1606 int __init acpi_boot_init(void) 1607 { 1608 /* those are executed after early-quirks are executed */ 1609 dmi_check_system(acpi_dmi_table_late); 1610 1611 /* 1612 * If acpi_disabled, bail out 1613 */ 1614 if (acpi_disabled) 1615 return 1; 1616 1617 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf); 1618 1619 /* 1620 * set sci_int and PM timer address 1621 */ 1622 acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt); 1623 1624 /* 1625 * Process the Multiple APIC Description Table (MADT), if present 1626 */ 1627 acpi_process_madt(); 1628 1629 acpi_table_parse(ACPI_SIG_HPET, acpi_parse_hpet); 1630 if (IS_ENABLED(CONFIG_ACPI_BGRT)) 1631 acpi_table_parse(ACPI_SIG_BGRT, acpi_parse_bgrt); 1632 1633 if (!acpi_noirq) 1634 x86_init.pci.init = pci_acpi_init; 1635 1636 /* Do not enable ACPI SPCR console by default */ 1637 acpi_parse_spcr(earlycon_acpi_spcr_enable, false); 1638 return 0; 1639 } 1640 1641 static int __init parse_acpi(char *arg) 1642 { 1643 if (!arg) 1644 return -EINVAL; 1645 1646 /* "acpi=off" disables both ACPI table parsing and interpreter */ 1647 if (strcmp(arg, "off") == 0) { 1648 disable_acpi(); 1649 } 1650 /* acpi=force to over-ride black-list */ 1651 else if (strcmp(arg, "force") == 0) { 1652 acpi_force = 1; 1653 acpi_disabled = 0; 1654 } 1655 /* acpi=strict disables out-of-spec workarounds */ 1656 else if (strcmp(arg, "strict") == 0) { 1657 acpi_strict = 1; 1658 } 1659 /* acpi=rsdt use RSDT instead of XSDT */ 1660 else if (strcmp(arg, "rsdt") == 0) { 1661 acpi_gbl_do_not_use_xsdt = TRUE; 1662 } 1663 /* "acpi=noirq" disables ACPI interrupt routing */ 1664 else if (strcmp(arg, "noirq") == 0) { 1665 acpi_noirq_set(); 1666 } 1667 /* "acpi=copy_dsdt" copys DSDT */ 1668 else if (strcmp(arg, "copy_dsdt") == 0) { 1669 acpi_gbl_copy_dsdt_locally = 1; 1670 } 1671 /* "acpi=nocmcff" disables FF mode for corrected errors */ 1672 else if (strcmp(arg, "nocmcff") == 0) { 1673 acpi_disable_cmcff = 1; 1674 } else { 1675 /* Core will printk when we return error. */ 1676 return -EINVAL; 1677 } 1678 return 0; 1679 } 1680 early_param("acpi", parse_acpi); 1681 1682 /* FIXME: Using pci= for an ACPI parameter is a travesty. */ 1683 static int __init parse_pci(char *arg) 1684 { 1685 if (arg && strcmp(arg, "noacpi") == 0) 1686 acpi_disable_pci(); 1687 return 0; 1688 } 1689 early_param("pci", parse_pci); 1690 1691 int __init acpi_mps_check(void) 1692 { 1693 #if defined(CONFIG_X86_LOCAL_APIC) && !defined(CONFIG_X86_MPPARSE) 1694 /* mptable code is not built-in*/ 1695 if (acpi_disabled || acpi_noirq) { 1696 printk(KERN_WARNING "MPS support code is not built-in.\n" 1697 "Using acpi=off or acpi=noirq or pci=noacpi " 1698 "may have problem\n"); 1699 return 1; 1700 } 1701 #endif 1702 return 0; 1703 } 1704 1705 #ifdef CONFIG_X86_IO_APIC 1706 static int __init parse_acpi_skip_timer_override(char *arg) 1707 { 1708 acpi_skip_timer_override = 1; 1709 return 0; 1710 } 1711 early_param("acpi_skip_timer_override", parse_acpi_skip_timer_override); 1712 1713 static int __init parse_acpi_use_timer_override(char *arg) 1714 { 1715 acpi_use_timer_override = 1; 1716 return 0; 1717 } 1718 early_param("acpi_use_timer_override", parse_acpi_use_timer_override); 1719 #endif /* CONFIG_X86_IO_APIC */ 1720 1721 static int __init setup_acpi_sci(char *s) 1722 { 1723 if (!s) 1724 return -EINVAL; 1725 if (!strcmp(s, "edge")) 1726 acpi_sci_flags = ACPI_MADT_TRIGGER_EDGE | 1727 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK); 1728 else if (!strcmp(s, "level")) 1729 acpi_sci_flags = ACPI_MADT_TRIGGER_LEVEL | 1730 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK); 1731 else if (!strcmp(s, "high")) 1732 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_HIGH | 1733 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK); 1734 else if (!strcmp(s, "low")) 1735 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_LOW | 1736 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK); 1737 else 1738 return -EINVAL; 1739 return 0; 1740 } 1741 early_param("acpi_sci", setup_acpi_sci); 1742 1743 int __acpi_acquire_global_lock(unsigned int *lock) 1744 { 1745 unsigned int old, new, val; 1746 do { 1747 old = *lock; 1748 new = (((old & ~0x3) + 2) + ((old >> 1) & 0x1)); 1749 val = cmpxchg(lock, old, new); 1750 } while (unlikely (val != old)); 1751 return (new < 3) ? -1 : 0; 1752 } 1753 1754 int __acpi_release_global_lock(unsigned int *lock) 1755 { 1756 unsigned int old, new, val; 1757 do { 1758 old = *lock; 1759 new = old & ~0x3; 1760 val = cmpxchg(lock, old, new); 1761 } while (unlikely (val != old)); 1762 return old & 0x1; 1763 } 1764 1765 void __init arch_reserve_mem_area(acpi_physical_address addr, size_t size) 1766 { 1767 e820__range_add(addr, size, E820_TYPE_ACPI); 1768 e820__update_table_print(); 1769 } 1770