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/module.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 39 #include <asm/pci_x86.h> 40 #include <asm/pgtable.h> 41 #include <asm/io_apic.h> 42 #include <asm/apic.h> 43 #include <asm/io.h> 44 #include <asm/mpspec.h> 45 #include <asm/smp.h> 46 47 static int __initdata acpi_force = 0; 48 u32 acpi_rsdt_forced; 49 int acpi_disabled; 50 EXPORT_SYMBOL(acpi_disabled); 51 52 #ifdef CONFIG_X86_64 53 # include <asm/proto.h> 54 # include <asm/numa_64.h> 55 #endif /* X86 */ 56 57 #define BAD_MADT_ENTRY(entry, end) ( \ 58 (!entry) || (unsigned long)entry + sizeof(*entry) > end || \ 59 ((struct acpi_subtable_header *)entry)->length < sizeof(*entry)) 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 71 u8 acpi_sci_flags __initdata; 72 int acpi_sci_override_gsi __initdata; 73 int acpi_skip_timer_override __initdata; 74 int acpi_use_timer_override __initdata; 75 int acpi_fix_pin2_polarity __initdata; 76 77 #ifdef CONFIG_X86_LOCAL_APIC 78 static u64 acpi_lapic_addr __initdata = APIC_DEFAULT_PHYS_BASE; 79 #endif 80 81 #ifndef __HAVE_ARCH_CMPXCHG 82 #warning ACPI uses CMPXCHG, i486 and later hardware 83 #endif 84 85 /* -------------------------------------------------------------------------- 86 Boot-time Configuration 87 -------------------------------------------------------------------------- */ 88 89 /* 90 * The default interrupt routing model is PIC (8259). This gets 91 * overridden if IOAPICs are enumerated (below). 92 */ 93 enum acpi_irq_model_id acpi_irq_model = ACPI_IRQ_MODEL_PIC; 94 95 96 /* 97 * ISA irqs by default are the first 16 gsis but can be 98 * any gsi as specified by an interrupt source override. 99 */ 100 static u32 isa_irq_to_gsi[NR_IRQS_LEGACY] __read_mostly = { 101 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 102 }; 103 104 static unsigned int gsi_to_irq(unsigned int gsi) 105 { 106 unsigned int irq = gsi + NR_IRQS_LEGACY; 107 unsigned int i; 108 109 for (i = 0; i < NR_IRQS_LEGACY; i++) { 110 if (isa_irq_to_gsi[i] == gsi) { 111 return i; 112 } 113 } 114 115 /* Provide an identity mapping of gsi == irq 116 * except on truly weird platforms that have 117 * non isa irqs in the first 16 gsis. 118 */ 119 if (gsi >= NR_IRQS_LEGACY) 120 irq = gsi; 121 else 122 irq = gsi_top + gsi; 123 124 return irq; 125 } 126 127 static u32 irq_to_gsi(int irq) 128 { 129 unsigned int gsi; 130 131 if (irq < NR_IRQS_LEGACY) 132 gsi = isa_irq_to_gsi[irq]; 133 else if (irq < gsi_top) 134 gsi = irq; 135 else if (irq < (gsi_top + NR_IRQS_LEGACY)) 136 gsi = irq - gsi_top; 137 else 138 gsi = 0xffffffff; 139 140 return gsi; 141 } 142 143 /* 144 * Temporarily use the virtual area starting from FIX_IO_APIC_BASE_END, 145 * to map the target physical address. The problem is that set_fixmap() 146 * provides a single page, and it is possible that the page is not 147 * sufficient. 148 * By using this area, we can map up to MAX_IO_APICS pages temporarily, 149 * i.e. until the next __va_range() call. 150 * 151 * Important Safety Note: The fixed I/O APIC page numbers are *subtracted* 152 * from the fixed base. That's why we start at FIX_IO_APIC_BASE_END and 153 * count idx down while incrementing the phys address. 154 */ 155 char *__init __acpi_map_table(unsigned long phys, unsigned long size) 156 { 157 158 if (!phys || !size) 159 return NULL; 160 161 return early_ioremap(phys, size); 162 } 163 void __init __acpi_unmap_table(char *map, unsigned long size) 164 { 165 if (!map || !size) 166 return; 167 168 early_iounmap(map, size); 169 } 170 171 #ifdef CONFIG_X86_LOCAL_APIC 172 static int __init acpi_parse_madt(struct acpi_table_header *table) 173 { 174 struct acpi_table_madt *madt = NULL; 175 176 if (!cpu_has_apic) 177 return -EINVAL; 178 179 madt = (struct acpi_table_madt *)table; 180 if (!madt) { 181 printk(KERN_WARNING PREFIX "Unable to map MADT\n"); 182 return -ENODEV; 183 } 184 185 if (madt->address) { 186 acpi_lapic_addr = (u64) madt->address; 187 188 printk(KERN_DEBUG PREFIX "Local APIC address 0x%08x\n", 189 madt->address); 190 } 191 192 default_acpi_madt_oem_check(madt->header.oem_id, 193 madt->header.oem_table_id); 194 195 return 0; 196 } 197 198 static void __cpuinit acpi_register_lapic(int id, u8 enabled) 199 { 200 unsigned int ver = 0; 201 202 if (id >= (MAX_LOCAL_APIC-1)) { 203 printk(KERN_INFO PREFIX "skipped apicid that is too big\n"); 204 return; 205 } 206 207 if (!enabled) { 208 ++disabled_cpus; 209 return; 210 } 211 212 if (boot_cpu_physical_apicid != -1U) 213 ver = apic_version[boot_cpu_physical_apicid]; 214 215 generic_processor_info(id, ver); 216 } 217 218 static int __init 219 acpi_parse_x2apic(struct acpi_subtable_header *header, const unsigned long end) 220 { 221 struct acpi_madt_local_x2apic *processor = NULL; 222 223 processor = (struct acpi_madt_local_x2apic *)header; 224 225 if (BAD_MADT_ENTRY(processor, end)) 226 return -EINVAL; 227 228 acpi_table_print_madt_entry(header); 229 230 #ifdef CONFIG_X86_X2APIC 231 /* 232 * We need to register disabled CPU as well to permit 233 * counting disabled CPUs. This allows us to size 234 * cpus_possible_map more accurately, to permit 235 * to not preallocating memory for all NR_CPUS 236 * when we use CPU hotplug. 237 */ 238 acpi_register_lapic(processor->local_apic_id, /* APIC ID */ 239 processor->lapic_flags & ACPI_MADT_ENABLED); 240 #else 241 printk(KERN_WARNING PREFIX "x2apic entry ignored\n"); 242 #endif 243 244 return 0; 245 } 246 247 static int __init 248 acpi_parse_lapic(struct acpi_subtable_header * header, const unsigned long end) 249 { 250 struct acpi_madt_local_apic *processor = NULL; 251 252 processor = (struct acpi_madt_local_apic *)header; 253 254 if (BAD_MADT_ENTRY(processor, end)) 255 return -EINVAL; 256 257 acpi_table_print_madt_entry(header); 258 259 /* 260 * We need to register disabled CPU as well to permit 261 * counting disabled CPUs. This allows us to size 262 * cpus_possible_map more accurately, to permit 263 * to not preallocating memory for all NR_CPUS 264 * when we use CPU hotplug. 265 */ 266 acpi_register_lapic(processor->id, /* APIC ID */ 267 processor->lapic_flags & ACPI_MADT_ENABLED); 268 269 return 0; 270 } 271 272 static int __init 273 acpi_parse_sapic(struct acpi_subtable_header *header, const unsigned long end) 274 { 275 struct acpi_madt_local_sapic *processor = NULL; 276 277 processor = (struct acpi_madt_local_sapic *)header; 278 279 if (BAD_MADT_ENTRY(processor, end)) 280 return -EINVAL; 281 282 acpi_table_print_madt_entry(header); 283 284 acpi_register_lapic((processor->id << 8) | processor->eid,/* APIC ID */ 285 processor->lapic_flags & ACPI_MADT_ENABLED); 286 287 return 0; 288 } 289 290 static int __init 291 acpi_parse_lapic_addr_ovr(struct acpi_subtable_header * header, 292 const unsigned long end) 293 { 294 struct acpi_madt_local_apic_override *lapic_addr_ovr = NULL; 295 296 lapic_addr_ovr = (struct acpi_madt_local_apic_override *)header; 297 298 if (BAD_MADT_ENTRY(lapic_addr_ovr, end)) 299 return -EINVAL; 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 346 347 static int __init 348 acpi_parse_ioapic(struct acpi_subtable_header * header, const unsigned long end) 349 { 350 struct acpi_madt_io_apic *ioapic = NULL; 351 352 ioapic = (struct acpi_madt_io_apic *)header; 353 354 if (BAD_MADT_ENTRY(ioapic, end)) 355 return -EINVAL; 356 357 acpi_table_print_madt_entry(header); 358 359 mp_register_ioapic(ioapic->id, 360 ioapic->address, ioapic->global_irq_base); 361 362 return 0; 363 } 364 365 /* 366 * Parse Interrupt Source Override for the ACPI SCI 367 */ 368 static void __init acpi_sci_ioapic_setup(u8 bus_irq, u16 polarity, u16 trigger, u32 gsi) 369 { 370 if (trigger == 0) /* compatible SCI trigger is level */ 371 trigger = 3; 372 373 if (polarity == 0) /* compatible SCI polarity is low */ 374 polarity = 3; 375 376 /* Command-line over-ride via acpi_sci= */ 377 if (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) 378 trigger = (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2; 379 380 if (acpi_sci_flags & ACPI_MADT_POLARITY_MASK) 381 polarity = acpi_sci_flags & ACPI_MADT_POLARITY_MASK; 382 383 /* 384 * mp_config_acpi_legacy_irqs() already setup IRQs < 16 385 * If GSI is < 16, this will update its flags, 386 * else it will create a new mp_irqs[] entry. 387 */ 388 mp_override_legacy_irq(bus_irq, polarity, trigger, gsi); 389 390 /* 391 * stash over-ride to indicate we've been here 392 * and for later update of acpi_gbl_FADT 393 */ 394 acpi_sci_override_gsi = gsi; 395 return; 396 } 397 398 static int __init 399 acpi_parse_int_src_ovr(struct acpi_subtable_header * header, 400 const unsigned long end) 401 { 402 struct acpi_madt_interrupt_override *intsrc = NULL; 403 404 intsrc = (struct acpi_madt_interrupt_override *)header; 405 406 if (BAD_MADT_ENTRY(intsrc, end)) 407 return -EINVAL; 408 409 acpi_table_print_madt_entry(header); 410 411 if (intsrc->source_irq == acpi_gbl_FADT.sci_interrupt) { 412 acpi_sci_ioapic_setup(intsrc->source_irq, 413 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK, 414 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2, 415 intsrc->global_irq); 416 return 0; 417 } 418 419 if (intsrc->source_irq == 0 && intsrc->global_irq == 2) { 420 if (acpi_skip_timer_override) { 421 printk(PREFIX "BIOS IRQ0 pin2 override ignored.\n"); 422 return 0; 423 } 424 if (acpi_fix_pin2_polarity && (intsrc->inti_flags & ACPI_MADT_POLARITY_MASK)) { 425 intsrc->inti_flags &= ~ACPI_MADT_POLARITY_MASK; 426 printk(PREFIX "BIOS IRQ0 pin2 override: forcing polarity to high active.\n"); 427 } 428 } 429 430 mp_override_legacy_irq(intsrc->source_irq, 431 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK, 432 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2, 433 intsrc->global_irq); 434 435 return 0; 436 } 437 438 static int __init 439 acpi_parse_nmi_src(struct acpi_subtable_header * header, const unsigned long end) 440 { 441 struct acpi_madt_nmi_source *nmi_src = NULL; 442 443 nmi_src = (struct acpi_madt_nmi_source *)header; 444 445 if (BAD_MADT_ENTRY(nmi_src, end)) 446 return -EINVAL; 447 448 acpi_table_print_madt_entry(header); 449 450 /* TBD: Support nimsrc entries? */ 451 452 return 0; 453 } 454 455 #endif /* CONFIG_X86_IO_APIC */ 456 457 /* 458 * acpi_pic_sci_set_trigger() 459 * 460 * use ELCR to set PIC-mode trigger type for SCI 461 * 462 * If a PIC-mode SCI is not recognized or gives spurious IRQ7's 463 * it may require Edge Trigger -- use "acpi_sci=edge" 464 * 465 * Port 0x4d0-4d1 are ECLR1 and ECLR2, the Edge/Level Control Registers 466 * for the 8259 PIC. bit[n] = 1 means irq[n] is Level, otherwise Edge. 467 * ECLR1 is IRQs 0-7 (IRQ 0, 1, 2 must be 0) 468 * ECLR2 is IRQs 8-15 (IRQ 8, 13 must be 0) 469 */ 470 471 void __init acpi_pic_sci_set_trigger(unsigned int irq, u16 trigger) 472 { 473 unsigned int mask = 1 << irq; 474 unsigned int old, new; 475 476 /* Real old ELCR mask */ 477 old = inb(0x4d0) | (inb(0x4d1) << 8); 478 479 /* 480 * If we use ACPI to set PCI IRQs, then we should clear ELCR 481 * since we will set it correctly as we enable the PCI irq 482 * routing. 483 */ 484 new = acpi_noirq ? old : 0; 485 486 /* 487 * Update SCI information in the ELCR, it isn't in the PCI 488 * routing tables.. 489 */ 490 switch (trigger) { 491 case 1: /* Edge - clear */ 492 new &= ~mask; 493 break; 494 case 3: /* Level - set */ 495 new |= mask; 496 break; 497 } 498 499 if (old == new) 500 return; 501 502 printk(PREFIX "setting ELCR to %04x (from %04x)\n", new, old); 503 outb(new, 0x4d0); 504 outb(new >> 8, 0x4d1); 505 } 506 507 int acpi_gsi_to_irq(u32 gsi, unsigned int *irq) 508 { 509 *irq = gsi_to_irq(gsi); 510 511 #ifdef CONFIG_X86_IO_APIC 512 if (acpi_irq_model == ACPI_IRQ_MODEL_IOAPIC) 513 setup_IO_APIC_irq_extra(gsi); 514 #endif 515 516 return 0; 517 } 518 EXPORT_SYMBOL_GPL(acpi_gsi_to_irq); 519 520 int acpi_isa_irq_to_gsi(unsigned isa_irq, u32 *gsi) 521 { 522 if (isa_irq >= 16) 523 return -1; 524 *gsi = irq_to_gsi(isa_irq); 525 return 0; 526 } 527 528 static int acpi_register_gsi_pic(struct device *dev, u32 gsi, 529 int trigger, int polarity) 530 { 531 #ifdef CONFIG_PCI 532 /* 533 * Make sure all (legacy) PCI IRQs are set as level-triggered. 534 */ 535 if (trigger == ACPI_LEVEL_SENSITIVE) 536 eisa_set_level_irq(gsi); 537 #endif 538 539 return gsi; 540 } 541 542 static int acpi_register_gsi_ioapic(struct device *dev, u32 gsi, 543 int trigger, int polarity) 544 { 545 #ifdef CONFIG_X86_IO_APIC 546 gsi = mp_register_gsi(dev, gsi, trigger, polarity); 547 #endif 548 549 return gsi; 550 } 551 552 int (*__acpi_register_gsi)(struct device *dev, u32 gsi, 553 int trigger, int polarity) = acpi_register_gsi_pic; 554 555 /* 556 * success: return IRQ number (>=0) 557 * failure: return < 0 558 */ 559 int acpi_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity) 560 { 561 unsigned int irq; 562 unsigned int plat_gsi = gsi; 563 564 plat_gsi = (*__acpi_register_gsi)(dev, gsi, trigger, polarity); 565 irq = gsi_to_irq(plat_gsi); 566 567 return irq; 568 } 569 570 void __init acpi_set_irq_model_pic(void) 571 { 572 acpi_irq_model = ACPI_IRQ_MODEL_PIC; 573 __acpi_register_gsi = acpi_register_gsi_pic; 574 acpi_ioapic = 0; 575 } 576 577 void __init acpi_set_irq_model_ioapic(void) 578 { 579 acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC; 580 __acpi_register_gsi = acpi_register_gsi_ioapic; 581 acpi_ioapic = 1; 582 } 583 584 /* 585 * ACPI based hotplug support for CPU 586 */ 587 #ifdef CONFIG_ACPI_HOTPLUG_CPU 588 #include <acpi/processor.h> 589 590 static void acpi_map_cpu2node(acpi_handle handle, int cpu, int physid) 591 { 592 #ifdef CONFIG_ACPI_NUMA 593 int nid; 594 595 nid = acpi_get_node(handle); 596 if (nid == -1 || !node_online(nid)) 597 return; 598 #ifdef CONFIG_X86_64 599 apicid_to_node[physid] = nid; 600 numa_set_node(cpu, nid); 601 #else /* CONFIG_X86_32 */ 602 apicid_2_node[physid] = nid; 603 cpu_to_node_map[cpu] = nid; 604 #endif 605 606 #endif 607 } 608 609 static int __cpuinit _acpi_map_lsapic(acpi_handle handle, int *pcpu) 610 { 611 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; 612 union acpi_object *obj; 613 struct acpi_madt_local_apic *lapic; 614 cpumask_var_t tmp_map, new_map; 615 u8 physid; 616 int cpu; 617 int retval = -ENOMEM; 618 619 if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer))) 620 return -EINVAL; 621 622 if (!buffer.length || !buffer.pointer) 623 return -EINVAL; 624 625 obj = buffer.pointer; 626 if (obj->type != ACPI_TYPE_BUFFER || 627 obj->buffer.length < sizeof(*lapic)) { 628 kfree(buffer.pointer); 629 return -EINVAL; 630 } 631 632 lapic = (struct acpi_madt_local_apic *)obj->buffer.pointer; 633 634 if (lapic->header.type != ACPI_MADT_TYPE_LOCAL_APIC || 635 !(lapic->lapic_flags & ACPI_MADT_ENABLED)) { 636 kfree(buffer.pointer); 637 return -EINVAL; 638 } 639 640 physid = lapic->id; 641 642 kfree(buffer.pointer); 643 buffer.length = ACPI_ALLOCATE_BUFFER; 644 buffer.pointer = NULL; 645 646 if (!alloc_cpumask_var(&tmp_map, GFP_KERNEL)) 647 goto out; 648 649 if (!alloc_cpumask_var(&new_map, GFP_KERNEL)) 650 goto free_tmp_map; 651 652 cpumask_copy(tmp_map, cpu_present_mask); 653 acpi_register_lapic(physid, lapic->lapic_flags & ACPI_MADT_ENABLED); 654 655 /* 656 * If mp_register_lapic successfully generates a new logical cpu 657 * number, then the following will get us exactly what was mapped 658 */ 659 cpumask_andnot(new_map, cpu_present_mask, tmp_map); 660 if (cpumask_empty(new_map)) { 661 printk ("Unable to map lapic to logical cpu number\n"); 662 retval = -EINVAL; 663 goto free_new_map; 664 } 665 666 acpi_processor_set_pdc(handle); 667 668 cpu = cpumask_first(new_map); 669 acpi_map_cpu2node(handle, cpu, physid); 670 671 *pcpu = cpu; 672 retval = 0; 673 674 free_new_map: 675 free_cpumask_var(new_map); 676 free_tmp_map: 677 free_cpumask_var(tmp_map); 678 out: 679 return retval; 680 } 681 682 /* wrapper to silence section mismatch warning */ 683 int __ref acpi_map_lsapic(acpi_handle handle, int *pcpu) 684 { 685 return _acpi_map_lsapic(handle, pcpu); 686 } 687 EXPORT_SYMBOL(acpi_map_lsapic); 688 689 int acpi_unmap_lsapic(int cpu) 690 { 691 per_cpu(x86_cpu_to_apicid, cpu) = -1; 692 set_cpu_present(cpu, false); 693 num_processors--; 694 695 return (0); 696 } 697 698 EXPORT_SYMBOL(acpi_unmap_lsapic); 699 #endif /* CONFIG_ACPI_HOTPLUG_CPU */ 700 701 int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base) 702 { 703 /* TBD */ 704 return -EINVAL; 705 } 706 707 EXPORT_SYMBOL(acpi_register_ioapic); 708 709 int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base) 710 { 711 /* TBD */ 712 return -EINVAL; 713 } 714 715 EXPORT_SYMBOL(acpi_unregister_ioapic); 716 717 static int __init acpi_parse_sbf(struct acpi_table_header *table) 718 { 719 struct acpi_table_boot *sb; 720 721 sb = (struct acpi_table_boot *)table; 722 if (!sb) { 723 printk(KERN_WARNING PREFIX "Unable to map SBF\n"); 724 return -ENODEV; 725 } 726 727 sbf_port = sb->cmos_index; /* Save CMOS port */ 728 729 return 0; 730 } 731 732 #ifdef CONFIG_HPET_TIMER 733 #include <asm/hpet.h> 734 735 static struct __initdata resource *hpet_res; 736 737 static int __init acpi_parse_hpet(struct acpi_table_header *table) 738 { 739 struct acpi_table_hpet *hpet_tbl; 740 741 hpet_tbl = (struct acpi_table_hpet *)table; 742 if (!hpet_tbl) { 743 printk(KERN_WARNING PREFIX "Unable to map HPET\n"); 744 return -ENODEV; 745 } 746 747 if (hpet_tbl->address.space_id != ACPI_SPACE_MEM) { 748 printk(KERN_WARNING PREFIX "HPET timers must be located in " 749 "memory.\n"); 750 return -1; 751 } 752 753 hpet_address = hpet_tbl->address.address; 754 hpet_blockid = hpet_tbl->sequence; 755 756 /* 757 * Some broken BIOSes advertise HPET at 0x0. We really do not 758 * want to allocate a resource there. 759 */ 760 if (!hpet_address) { 761 printk(KERN_WARNING PREFIX 762 "HPET id: %#x base: %#lx is invalid\n", 763 hpet_tbl->id, hpet_address); 764 return 0; 765 } 766 #ifdef CONFIG_X86_64 767 /* 768 * Some even more broken BIOSes advertise HPET at 769 * 0xfed0000000000000 instead of 0xfed00000. Fix it up and add 770 * some noise: 771 */ 772 if (hpet_address == 0xfed0000000000000UL) { 773 if (!hpet_force_user) { 774 printk(KERN_WARNING PREFIX "HPET id: %#x " 775 "base: 0xfed0000000000000 is bogus\n " 776 "try hpet=force on the kernel command line to " 777 "fix it up to 0xfed00000.\n", hpet_tbl->id); 778 hpet_address = 0; 779 return 0; 780 } 781 printk(KERN_WARNING PREFIX 782 "HPET id: %#x base: 0xfed0000000000000 fixed up " 783 "to 0xfed00000.\n", hpet_tbl->id); 784 hpet_address >>= 32; 785 } 786 #endif 787 printk(KERN_INFO PREFIX "HPET id: %#x base: %#lx\n", 788 hpet_tbl->id, hpet_address); 789 790 /* 791 * Allocate and initialize the HPET firmware resource for adding into 792 * the resource tree during the lateinit timeframe. 793 */ 794 #define HPET_RESOURCE_NAME_SIZE 9 795 hpet_res = alloc_bootmem(sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE); 796 797 hpet_res->name = (void *)&hpet_res[1]; 798 hpet_res->flags = IORESOURCE_MEM; 799 snprintf((char *)hpet_res->name, HPET_RESOURCE_NAME_SIZE, "HPET %u", 800 hpet_tbl->sequence); 801 802 hpet_res->start = hpet_address; 803 hpet_res->end = hpet_address + (1 * 1024) - 1; 804 805 return 0; 806 } 807 808 /* 809 * hpet_insert_resource inserts the HPET resources used into the resource 810 * tree. 811 */ 812 static __init int hpet_insert_resource(void) 813 { 814 if (!hpet_res) 815 return 1; 816 817 return insert_resource(&iomem_resource, hpet_res); 818 } 819 820 late_initcall(hpet_insert_resource); 821 822 #else 823 #define acpi_parse_hpet NULL 824 #endif 825 826 static int __init acpi_parse_fadt(struct acpi_table_header *table) 827 { 828 829 #ifdef CONFIG_X86_PM_TIMER 830 /* detect the location of the ACPI PM Timer */ 831 if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID) { 832 /* FADT rev. 2 */ 833 if (acpi_gbl_FADT.xpm_timer_block.space_id != 834 ACPI_ADR_SPACE_SYSTEM_IO) 835 return 0; 836 837 pmtmr_ioport = acpi_gbl_FADT.xpm_timer_block.address; 838 /* 839 * "X" fields are optional extensions to the original V1.0 840 * fields, so we must selectively expand V1.0 fields if the 841 * corresponding X field is zero. 842 */ 843 if (!pmtmr_ioport) 844 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block; 845 } else { 846 /* FADT rev. 1 */ 847 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block; 848 } 849 if (pmtmr_ioport) 850 printk(KERN_INFO PREFIX "PM-Timer IO Port: %#x\n", 851 pmtmr_ioport); 852 #endif 853 return 0; 854 } 855 856 #ifdef CONFIG_X86_LOCAL_APIC 857 /* 858 * Parse LAPIC entries in MADT 859 * returns 0 on success, < 0 on error 860 */ 861 862 static int __init early_acpi_parse_madt_lapic_addr_ovr(void) 863 { 864 int count; 865 866 if (!cpu_has_apic) 867 return -ENODEV; 868 869 /* 870 * Note that the LAPIC address is obtained from the MADT (32-bit value) 871 * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value). 872 */ 873 874 count = 875 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE, 876 acpi_parse_lapic_addr_ovr, 0); 877 if (count < 0) { 878 printk(KERN_ERR PREFIX 879 "Error parsing LAPIC address override entry\n"); 880 return count; 881 } 882 883 register_lapic_address(acpi_lapic_addr); 884 885 return count; 886 } 887 888 static int __init acpi_parse_madt_lapic_entries(void) 889 { 890 int count; 891 int x2count = 0; 892 893 if (!cpu_has_apic) 894 return -ENODEV; 895 896 /* 897 * Note that the LAPIC address is obtained from the MADT (32-bit value) 898 * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value). 899 */ 900 901 count = 902 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE, 903 acpi_parse_lapic_addr_ovr, 0); 904 if (count < 0) { 905 printk(KERN_ERR PREFIX 906 "Error parsing LAPIC address override entry\n"); 907 return count; 908 } 909 910 register_lapic_address(acpi_lapic_addr); 911 912 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC, 913 acpi_parse_sapic, MAX_LOCAL_APIC); 914 915 if (!count) { 916 x2count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC, 917 acpi_parse_x2apic, MAX_LOCAL_APIC); 918 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC, 919 acpi_parse_lapic, MAX_LOCAL_APIC); 920 } 921 if (!count && !x2count) { 922 printk(KERN_ERR PREFIX "No LAPIC entries present\n"); 923 /* TBD: Cleanup to allow fallback to MPS */ 924 return -ENODEV; 925 } else if (count < 0 || x2count < 0) { 926 printk(KERN_ERR PREFIX "Error parsing LAPIC entry\n"); 927 /* TBD: Cleanup to allow fallback to MPS */ 928 return count; 929 } 930 931 x2count = 932 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC_NMI, 933 acpi_parse_x2apic_nmi, 0); 934 count = 935 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI, acpi_parse_lapic_nmi, 0); 936 if (count < 0 || x2count < 0) { 937 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n"); 938 /* TBD: Cleanup to allow fallback to MPS */ 939 return count; 940 } 941 return 0; 942 } 943 #endif /* CONFIG_X86_LOCAL_APIC */ 944 945 #ifdef CONFIG_X86_IO_APIC 946 #define MP_ISA_BUS 0 947 948 #ifdef CONFIG_X86_ES7000 949 extern int es7000_plat; 950 #endif 951 952 void __init mp_override_legacy_irq(u8 bus_irq, u8 polarity, u8 trigger, u32 gsi) 953 { 954 int ioapic; 955 int pin; 956 struct mpc_intsrc mp_irq; 957 958 /* 959 * Convert 'gsi' to 'ioapic.pin'. 960 */ 961 ioapic = mp_find_ioapic(gsi); 962 if (ioapic < 0) 963 return; 964 pin = mp_find_ioapic_pin(ioapic, gsi); 965 966 /* 967 * TBD: This check is for faulty timer entries, where the override 968 * erroneously sets the trigger to level, resulting in a HUGE 969 * increase of timer interrupts! 970 */ 971 if ((bus_irq == 0) && (trigger == 3)) 972 trigger = 1; 973 974 mp_irq.type = MP_INTSRC; 975 mp_irq.irqtype = mp_INT; 976 mp_irq.irqflag = (trigger << 2) | polarity; 977 mp_irq.srcbus = MP_ISA_BUS; 978 mp_irq.srcbusirq = bus_irq; /* IRQ */ 979 mp_irq.dstapic = mp_ioapics[ioapic].apicid; /* APIC ID */ 980 mp_irq.dstirq = pin; /* INTIN# */ 981 982 mp_save_irq(&mp_irq); 983 984 isa_irq_to_gsi[bus_irq] = gsi; 985 } 986 987 void __init mp_config_acpi_legacy_irqs(void) 988 { 989 int i; 990 struct mpc_intsrc mp_irq; 991 992 #if defined (CONFIG_MCA) || defined (CONFIG_EISA) 993 /* 994 * Fabricate the legacy ISA bus (bus #31). 995 */ 996 mp_bus_id_to_type[MP_ISA_BUS] = MP_BUS_ISA; 997 #endif 998 set_bit(MP_ISA_BUS, mp_bus_not_pci); 999 pr_debug("Bus #%d is ISA\n", MP_ISA_BUS); 1000 1001 #ifdef CONFIG_X86_ES7000 1002 /* 1003 * Older generations of ES7000 have no legacy identity mappings 1004 */ 1005 if (es7000_plat == 1) 1006 return; 1007 #endif 1008 1009 /* 1010 * Use the default configuration for the IRQs 0-15. Unless 1011 * overridden by (MADT) interrupt source override entries. 1012 */ 1013 for (i = 0; i < 16; i++) { 1014 int ioapic, pin; 1015 unsigned int dstapic; 1016 int idx; 1017 u32 gsi; 1018 1019 /* Locate the gsi that irq i maps to. */ 1020 if (acpi_isa_irq_to_gsi(i, &gsi)) 1021 continue; 1022 1023 /* 1024 * Locate the IOAPIC that manages the ISA IRQ. 1025 */ 1026 ioapic = mp_find_ioapic(gsi); 1027 if (ioapic < 0) 1028 continue; 1029 pin = mp_find_ioapic_pin(ioapic, gsi); 1030 dstapic = mp_ioapics[ioapic].apicid; 1031 1032 for (idx = 0; idx < mp_irq_entries; idx++) { 1033 struct mpc_intsrc *irq = mp_irqs + idx; 1034 1035 /* Do we already have a mapping for this ISA IRQ? */ 1036 if (irq->srcbus == MP_ISA_BUS && irq->srcbusirq == i) 1037 break; 1038 1039 /* Do we already have a mapping for this IOAPIC pin */ 1040 if (irq->dstapic == dstapic && irq->dstirq == pin) 1041 break; 1042 } 1043 1044 if (idx != mp_irq_entries) { 1045 printk(KERN_DEBUG "ACPI: IRQ%d used by override.\n", i); 1046 continue; /* IRQ already used */ 1047 } 1048 1049 mp_irq.type = MP_INTSRC; 1050 mp_irq.irqflag = 0; /* Conforming */ 1051 mp_irq.srcbus = MP_ISA_BUS; 1052 mp_irq.dstapic = dstapic; 1053 mp_irq.irqtype = mp_INT; 1054 mp_irq.srcbusirq = i; /* Identity mapped */ 1055 mp_irq.dstirq = pin; 1056 1057 mp_save_irq(&mp_irq); 1058 } 1059 } 1060 1061 static int mp_config_acpi_gsi(struct device *dev, u32 gsi, int trigger, 1062 int polarity) 1063 { 1064 #ifdef CONFIG_X86_MPPARSE 1065 struct mpc_intsrc mp_irq; 1066 struct pci_dev *pdev; 1067 unsigned char number; 1068 unsigned int devfn; 1069 int ioapic; 1070 u8 pin; 1071 1072 if (!acpi_ioapic) 1073 return 0; 1074 if (!dev) 1075 return 0; 1076 if (dev->bus != &pci_bus_type) 1077 return 0; 1078 1079 pdev = to_pci_dev(dev); 1080 number = pdev->bus->number; 1081 devfn = pdev->devfn; 1082 pin = pdev->pin; 1083 /* print the entry should happen on mptable identically */ 1084 mp_irq.type = MP_INTSRC; 1085 mp_irq.irqtype = mp_INT; 1086 mp_irq.irqflag = (trigger == ACPI_EDGE_SENSITIVE ? 4 : 0x0c) | 1087 (polarity == ACPI_ACTIVE_HIGH ? 1 : 3); 1088 mp_irq.srcbus = number; 1089 mp_irq.srcbusirq = (((devfn >> 3) & 0x1f) << 2) | ((pin - 1) & 3); 1090 ioapic = mp_find_ioapic(gsi); 1091 mp_irq.dstapic = mp_ioapics[ioapic].apicid; 1092 mp_irq.dstirq = mp_find_ioapic_pin(ioapic, gsi); 1093 1094 mp_save_irq(&mp_irq); 1095 #endif 1096 return 0; 1097 } 1098 1099 int mp_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity) 1100 { 1101 int ioapic; 1102 int ioapic_pin; 1103 struct io_apic_irq_attr irq_attr; 1104 1105 if (acpi_irq_model != ACPI_IRQ_MODEL_IOAPIC) 1106 return gsi; 1107 1108 /* Don't set up the ACPI SCI because it's already set up */ 1109 if (acpi_gbl_FADT.sci_interrupt == gsi) 1110 return gsi; 1111 1112 ioapic = mp_find_ioapic(gsi); 1113 if (ioapic < 0) { 1114 printk(KERN_WARNING "No IOAPIC for GSI %u\n", gsi); 1115 return gsi; 1116 } 1117 1118 ioapic_pin = mp_find_ioapic_pin(ioapic, gsi); 1119 1120 if (ioapic_pin > MP_MAX_IOAPIC_PIN) { 1121 printk(KERN_ERR "Invalid reference to IOAPIC pin " 1122 "%d-%d\n", mp_ioapics[ioapic].apicid, 1123 ioapic_pin); 1124 return gsi; 1125 } 1126 1127 if (enable_update_mptable) 1128 mp_config_acpi_gsi(dev, gsi, trigger, polarity); 1129 1130 set_io_apic_irq_attr(&irq_attr, ioapic, ioapic_pin, 1131 trigger == ACPI_EDGE_SENSITIVE ? 0 : 1, 1132 polarity == ACPI_ACTIVE_HIGH ? 0 : 1); 1133 io_apic_set_pci_routing(dev, gsi_to_irq(gsi), &irq_attr); 1134 1135 return gsi; 1136 } 1137 1138 /* 1139 * Parse IOAPIC related entries in MADT 1140 * returns 0 on success, < 0 on error 1141 */ 1142 static int __init acpi_parse_madt_ioapic_entries(void) 1143 { 1144 int count; 1145 1146 /* 1147 * ACPI interpreter is required to complete interrupt setup, 1148 * so if it is off, don't enumerate the io-apics with ACPI. 1149 * If MPS is present, it will handle them, 1150 * otherwise the system will stay in PIC mode 1151 */ 1152 if (acpi_disabled || acpi_noirq) 1153 return -ENODEV; 1154 1155 if (!cpu_has_apic) 1156 return -ENODEV; 1157 1158 /* 1159 * if "noapic" boot option, don't look for IO-APICs 1160 */ 1161 if (skip_ioapic_setup) { 1162 printk(KERN_INFO PREFIX "Skipping IOAPIC probe " 1163 "due to 'noapic' option.\n"); 1164 return -ENODEV; 1165 } 1166 1167 count = 1168 acpi_table_parse_madt(ACPI_MADT_TYPE_IO_APIC, acpi_parse_ioapic, 1169 MAX_IO_APICS); 1170 if (!count) { 1171 printk(KERN_ERR PREFIX "No IOAPIC entries present\n"); 1172 return -ENODEV; 1173 } else if (count < 0) { 1174 printk(KERN_ERR PREFIX "Error parsing IOAPIC entry\n"); 1175 return count; 1176 } 1177 1178 count = 1179 acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE, acpi_parse_int_src_ovr, 1180 nr_irqs); 1181 if (count < 0) { 1182 printk(KERN_ERR PREFIX 1183 "Error parsing interrupt source overrides entry\n"); 1184 /* TBD: Cleanup to allow fallback to MPS */ 1185 return count; 1186 } 1187 1188 /* 1189 * If BIOS did not supply an INT_SRC_OVR for the SCI 1190 * pretend we got one so we can set the SCI flags. 1191 */ 1192 if (!acpi_sci_override_gsi) 1193 acpi_sci_ioapic_setup(acpi_gbl_FADT.sci_interrupt, 0, 0, 1194 acpi_gbl_FADT.sci_interrupt); 1195 1196 /* Fill in identity legacy mappings where no override */ 1197 mp_config_acpi_legacy_irqs(); 1198 1199 count = 1200 acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE, acpi_parse_nmi_src, 1201 nr_irqs); 1202 if (count < 0) { 1203 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n"); 1204 /* TBD: Cleanup to allow fallback to MPS */ 1205 return count; 1206 } 1207 1208 return 0; 1209 } 1210 #else 1211 static inline int acpi_parse_madt_ioapic_entries(void) 1212 { 1213 return -1; 1214 } 1215 #endif /* !CONFIG_X86_IO_APIC */ 1216 1217 static void __init early_acpi_process_madt(void) 1218 { 1219 #ifdef CONFIG_X86_LOCAL_APIC 1220 int error; 1221 1222 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) { 1223 1224 /* 1225 * Parse MADT LAPIC entries 1226 */ 1227 error = early_acpi_parse_madt_lapic_addr_ovr(); 1228 if (!error) { 1229 acpi_lapic = 1; 1230 smp_found_config = 1; 1231 } 1232 if (error == -EINVAL) { 1233 /* 1234 * Dell Precision Workstation 410, 610 come here. 1235 */ 1236 printk(KERN_ERR PREFIX 1237 "Invalid BIOS MADT, disabling ACPI\n"); 1238 disable_acpi(); 1239 } 1240 } 1241 #endif 1242 } 1243 1244 static void __init acpi_process_madt(void) 1245 { 1246 #ifdef CONFIG_X86_LOCAL_APIC 1247 int error; 1248 1249 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) { 1250 1251 /* 1252 * Parse MADT LAPIC entries 1253 */ 1254 error = acpi_parse_madt_lapic_entries(); 1255 if (!error) { 1256 acpi_lapic = 1; 1257 1258 /* 1259 * Parse MADT IO-APIC entries 1260 */ 1261 error = acpi_parse_madt_ioapic_entries(); 1262 if (!error) { 1263 acpi_set_irq_model_ioapic(); 1264 1265 smp_found_config = 1; 1266 } 1267 } 1268 if (error == -EINVAL) { 1269 /* 1270 * Dell Precision Workstation 410, 610 come here. 1271 */ 1272 printk(KERN_ERR PREFIX 1273 "Invalid BIOS MADT, disabling ACPI\n"); 1274 disable_acpi(); 1275 } 1276 } else { 1277 /* 1278 * ACPI found no MADT, and so ACPI wants UP PIC mode. 1279 * In the event an MPS table was found, forget it. 1280 * Boot with "acpi=off" to use MPS on such a system. 1281 */ 1282 if (smp_found_config) { 1283 printk(KERN_WARNING PREFIX 1284 "No APIC-table, disabling MPS\n"); 1285 smp_found_config = 0; 1286 } 1287 } 1288 1289 /* 1290 * ACPI supports both logical (e.g. Hyper-Threading) and physical 1291 * processors, where MPS only supports physical. 1292 */ 1293 if (acpi_lapic && acpi_ioapic) 1294 printk(KERN_INFO "Using ACPI (MADT) for SMP configuration " 1295 "information\n"); 1296 else if (acpi_lapic) 1297 printk(KERN_INFO "Using ACPI for processor (LAPIC) " 1298 "configuration information\n"); 1299 #endif 1300 return; 1301 } 1302 1303 static int __init disable_acpi_irq(const struct dmi_system_id *d) 1304 { 1305 if (!acpi_force) { 1306 printk(KERN_NOTICE "%s detected: force use of acpi=noirq\n", 1307 d->ident); 1308 acpi_noirq_set(); 1309 } 1310 return 0; 1311 } 1312 1313 static int __init disable_acpi_pci(const struct dmi_system_id *d) 1314 { 1315 if (!acpi_force) { 1316 printk(KERN_NOTICE "%s detected: force use of pci=noacpi\n", 1317 d->ident); 1318 acpi_disable_pci(); 1319 } 1320 return 0; 1321 } 1322 1323 static int __init dmi_disable_acpi(const struct dmi_system_id *d) 1324 { 1325 if (!acpi_force) { 1326 printk(KERN_NOTICE "%s detected: acpi off\n", d->ident); 1327 disable_acpi(); 1328 } else { 1329 printk(KERN_NOTICE 1330 "Warning: DMI blacklist says broken, but acpi forced\n"); 1331 } 1332 return 0; 1333 } 1334 1335 /* 1336 * Force ignoring BIOS IRQ0 pin2 override 1337 */ 1338 static int __init dmi_ignore_irq0_timer_override(const struct dmi_system_id *d) 1339 { 1340 /* 1341 * The ati_ixp4x0_rev() early PCI quirk should have set 1342 * the acpi_skip_timer_override flag already: 1343 */ 1344 if (!acpi_skip_timer_override) { 1345 WARN(1, KERN_ERR "ati_ixp4x0 quirk not complete.\n"); 1346 pr_notice("%s detected: Ignoring BIOS IRQ0 pin2 override\n", 1347 d->ident); 1348 acpi_skip_timer_override = 1; 1349 } 1350 return 0; 1351 } 1352 1353 /* 1354 * If your system is blacklisted here, but you find that acpi=force 1355 * works for you, please contact linux-acpi@vger.kernel.org 1356 */ 1357 static struct dmi_system_id __initdata acpi_dmi_table[] = { 1358 /* 1359 * Boxes that need ACPI disabled 1360 */ 1361 { 1362 .callback = dmi_disable_acpi, 1363 .ident = "IBM Thinkpad", 1364 .matches = { 1365 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), 1366 DMI_MATCH(DMI_BOARD_NAME, "2629H1G"), 1367 }, 1368 }, 1369 1370 /* 1371 * Boxes that need ACPI PCI IRQ routing disabled 1372 */ 1373 { 1374 .callback = disable_acpi_irq, 1375 .ident = "ASUS A7V", 1376 .matches = { 1377 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC"), 1378 DMI_MATCH(DMI_BOARD_NAME, "<A7V>"), 1379 /* newer BIOS, Revision 1011, does work */ 1380 DMI_MATCH(DMI_BIOS_VERSION, 1381 "ASUS A7V ACPI BIOS Revision 1007"), 1382 }, 1383 }, 1384 { 1385 /* 1386 * Latest BIOS for IBM 600E (1.16) has bad pcinum 1387 * for LPC bridge, which is needed for the PCI 1388 * interrupt links to work. DSDT fix is in bug 5966. 1389 * 2645, 2646 model numbers are shared with 600/600E/600X 1390 */ 1391 .callback = disable_acpi_irq, 1392 .ident = "IBM Thinkpad 600 Series 2645", 1393 .matches = { 1394 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), 1395 DMI_MATCH(DMI_BOARD_NAME, "2645"), 1396 }, 1397 }, 1398 { 1399 .callback = disable_acpi_irq, 1400 .ident = "IBM Thinkpad 600 Series 2646", 1401 .matches = { 1402 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), 1403 DMI_MATCH(DMI_BOARD_NAME, "2646"), 1404 }, 1405 }, 1406 /* 1407 * Boxes that need ACPI PCI IRQ routing and PCI scan disabled 1408 */ 1409 { /* _BBN 0 bug */ 1410 .callback = disable_acpi_pci, 1411 .ident = "ASUS PR-DLS", 1412 .matches = { 1413 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."), 1414 DMI_MATCH(DMI_BOARD_NAME, "PR-DLS"), 1415 DMI_MATCH(DMI_BIOS_VERSION, 1416 "ASUS PR-DLS ACPI BIOS Revision 1010"), 1417 DMI_MATCH(DMI_BIOS_DATE, "03/21/2003") 1418 }, 1419 }, 1420 { 1421 .callback = disable_acpi_pci, 1422 .ident = "Acer TravelMate 36x Laptop", 1423 .matches = { 1424 DMI_MATCH(DMI_SYS_VENDOR, "Acer"), 1425 DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"), 1426 }, 1427 }, 1428 {} 1429 }; 1430 1431 /* second table for DMI checks that should run after early-quirks */ 1432 static struct dmi_system_id __initdata acpi_dmi_table_late[] = { 1433 /* 1434 * HP laptops which use a DSDT reporting as HP/SB400/10000, 1435 * which includes some code which overrides all temperature 1436 * trip points to 16C if the INTIN2 input of the I/O APIC 1437 * is enabled. This input is incorrectly designated the 1438 * ISA IRQ 0 via an interrupt source override even though 1439 * it is wired to the output of the master 8259A and INTIN0 1440 * is not connected at all. Force ignoring BIOS IRQ0 pin2 1441 * override in that cases. 1442 */ 1443 { 1444 .callback = dmi_ignore_irq0_timer_override, 1445 .ident = "HP nx6115 laptop", 1446 .matches = { 1447 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 1448 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6115"), 1449 }, 1450 }, 1451 { 1452 .callback = dmi_ignore_irq0_timer_override, 1453 .ident = "HP NX6125 laptop", 1454 .matches = { 1455 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 1456 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6125"), 1457 }, 1458 }, 1459 { 1460 .callback = dmi_ignore_irq0_timer_override, 1461 .ident = "HP NX6325 laptop", 1462 .matches = { 1463 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 1464 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6325"), 1465 }, 1466 }, 1467 { 1468 .callback = dmi_ignore_irq0_timer_override, 1469 .ident = "HP 6715b laptop", 1470 .matches = { 1471 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 1472 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq 6715b"), 1473 }, 1474 }, 1475 {} 1476 }; 1477 1478 /* 1479 * acpi_boot_table_init() and acpi_boot_init() 1480 * called from setup_arch(), always. 1481 * 1. checksums all tables 1482 * 2. enumerates lapics 1483 * 3. enumerates io-apics 1484 * 1485 * acpi_table_init() is separate to allow reading SRAT without 1486 * other side effects. 1487 * 1488 * side effects of acpi_boot_init: 1489 * acpi_lapic = 1 if LAPIC found 1490 * acpi_ioapic = 1 if IOAPIC found 1491 * if (acpi_lapic && acpi_ioapic) smp_found_config = 1; 1492 * if acpi_blacklisted() acpi_disabled = 1; 1493 * acpi_irq_model=... 1494 * ... 1495 */ 1496 1497 void __init acpi_boot_table_init(void) 1498 { 1499 dmi_check_system(acpi_dmi_table); 1500 1501 /* 1502 * If acpi_disabled, bail out 1503 */ 1504 if (acpi_disabled) 1505 return; 1506 1507 /* 1508 * Initialize the ACPI boot-time table parser. 1509 */ 1510 if (acpi_table_init()) { 1511 disable_acpi(); 1512 return; 1513 } 1514 1515 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf); 1516 1517 /* 1518 * blacklist may disable ACPI entirely 1519 */ 1520 if (acpi_blacklisted()) { 1521 if (acpi_force) { 1522 printk(KERN_WARNING PREFIX "acpi=force override\n"); 1523 } else { 1524 printk(KERN_WARNING PREFIX "Disabling ACPI support\n"); 1525 disable_acpi(); 1526 return; 1527 } 1528 } 1529 } 1530 1531 int __init early_acpi_boot_init(void) 1532 { 1533 /* 1534 * If acpi_disabled, bail out 1535 */ 1536 if (acpi_disabled) 1537 return 1; 1538 1539 /* 1540 * Process the Multiple APIC Description Table (MADT), if present 1541 */ 1542 early_acpi_process_madt(); 1543 1544 return 0; 1545 } 1546 1547 int __init acpi_boot_init(void) 1548 { 1549 /* those are executed after early-quirks are executed */ 1550 dmi_check_system(acpi_dmi_table_late); 1551 1552 /* 1553 * If acpi_disabled, bail out 1554 */ 1555 if (acpi_disabled) 1556 return 1; 1557 1558 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf); 1559 1560 /* 1561 * set sci_int and PM timer address 1562 */ 1563 acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt); 1564 1565 /* 1566 * Process the Multiple APIC Description Table (MADT), if present 1567 */ 1568 acpi_process_madt(); 1569 1570 acpi_table_parse(ACPI_SIG_HPET, acpi_parse_hpet); 1571 1572 if (!acpi_noirq) 1573 x86_init.pci.init = pci_acpi_init; 1574 1575 return 0; 1576 } 1577 1578 static int __init parse_acpi(char *arg) 1579 { 1580 if (!arg) 1581 return -EINVAL; 1582 1583 /* "acpi=off" disables both ACPI table parsing and interpreter */ 1584 if (strcmp(arg, "off") == 0) { 1585 disable_acpi(); 1586 } 1587 /* acpi=force to over-ride black-list */ 1588 else if (strcmp(arg, "force") == 0) { 1589 acpi_force = 1; 1590 acpi_disabled = 0; 1591 } 1592 /* acpi=strict disables out-of-spec workarounds */ 1593 else if (strcmp(arg, "strict") == 0) { 1594 acpi_strict = 1; 1595 } 1596 /* acpi=rsdt use RSDT instead of XSDT */ 1597 else if (strcmp(arg, "rsdt") == 0) { 1598 acpi_rsdt_forced = 1; 1599 } 1600 /* "acpi=noirq" disables ACPI interrupt routing */ 1601 else if (strcmp(arg, "noirq") == 0) { 1602 acpi_noirq_set(); 1603 } 1604 /* "acpi=copy_dsdt" copys DSDT */ 1605 else if (strcmp(arg, "copy_dsdt") == 0) { 1606 acpi_gbl_copy_dsdt_locally = 1; 1607 } else { 1608 /* Core will printk when we return error. */ 1609 return -EINVAL; 1610 } 1611 return 0; 1612 } 1613 early_param("acpi", parse_acpi); 1614 1615 /* FIXME: Using pci= for an ACPI parameter is a travesty. */ 1616 static int __init parse_pci(char *arg) 1617 { 1618 if (arg && strcmp(arg, "noacpi") == 0) 1619 acpi_disable_pci(); 1620 return 0; 1621 } 1622 early_param("pci", parse_pci); 1623 1624 int __init acpi_mps_check(void) 1625 { 1626 #if defined(CONFIG_X86_LOCAL_APIC) && !defined(CONFIG_X86_MPPARSE) 1627 /* mptable code is not built-in*/ 1628 if (acpi_disabled || acpi_noirq) { 1629 printk(KERN_WARNING "MPS support code is not built-in.\n" 1630 "Using acpi=off or acpi=noirq or pci=noacpi " 1631 "may have problem\n"); 1632 return 1; 1633 } 1634 #endif 1635 return 0; 1636 } 1637 1638 #ifdef CONFIG_X86_IO_APIC 1639 static int __init parse_acpi_skip_timer_override(char *arg) 1640 { 1641 acpi_skip_timer_override = 1; 1642 return 0; 1643 } 1644 early_param("acpi_skip_timer_override", parse_acpi_skip_timer_override); 1645 1646 static int __init parse_acpi_use_timer_override(char *arg) 1647 { 1648 acpi_use_timer_override = 1; 1649 return 0; 1650 } 1651 early_param("acpi_use_timer_override", parse_acpi_use_timer_override); 1652 #endif /* CONFIG_X86_IO_APIC */ 1653 1654 static int __init setup_acpi_sci(char *s) 1655 { 1656 if (!s) 1657 return -EINVAL; 1658 if (!strcmp(s, "edge")) 1659 acpi_sci_flags = ACPI_MADT_TRIGGER_EDGE | 1660 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK); 1661 else if (!strcmp(s, "level")) 1662 acpi_sci_flags = ACPI_MADT_TRIGGER_LEVEL | 1663 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK); 1664 else if (!strcmp(s, "high")) 1665 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_HIGH | 1666 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK); 1667 else if (!strcmp(s, "low")) 1668 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_LOW | 1669 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK); 1670 else 1671 return -EINVAL; 1672 return 0; 1673 } 1674 early_param("acpi_sci", setup_acpi_sci); 1675 1676 int __acpi_acquire_global_lock(unsigned int *lock) 1677 { 1678 unsigned int old, new, val; 1679 do { 1680 old = *lock; 1681 new = (((old & ~0x3) + 2) + ((old >> 1) & 0x1)); 1682 val = cmpxchg(lock, old, new); 1683 } while (unlikely (val != old)); 1684 return (new < 3) ? -1 : 0; 1685 } 1686 1687 int __acpi_release_global_lock(unsigned int *lock) 1688 { 1689 unsigned int old, new, val; 1690 do { 1691 old = *lock; 1692 new = old & ~0x3; 1693 val = cmpxchg(lock, old, new); 1694 } while (unlikely (val != old)); 1695 return old & 0x1; 1696 } 1697