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