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 int apic_id; 223 u8 enabled; 224 225 processor = (struct acpi_madt_local_x2apic *)header; 226 227 if (BAD_MADT_ENTRY(processor, end)) 228 return -EINVAL; 229 230 acpi_table_print_madt_entry(header); 231 232 apic_id = processor->local_apic_id; 233 enabled = processor->lapic_flags & ACPI_MADT_ENABLED; 234 #ifdef CONFIG_X86_X2APIC 235 /* 236 * We need to register disabled CPU as well to permit 237 * counting disabled CPUs. This allows us to size 238 * cpus_possible_map more accurately, to permit 239 * to not preallocating memory for all NR_CPUS 240 * when we use CPU hotplug. 241 */ 242 if (!apic->apic_id_valid(apic_id) && enabled) 243 printk(KERN_WARNING PREFIX "x2apic entry ignored\n"); 244 else 245 acpi_register_lapic(apic_id, enabled); 246 #else 247 printk(KERN_WARNING PREFIX "x2apic entry ignored\n"); 248 #endif 249 250 return 0; 251 } 252 253 static int __init 254 acpi_parse_lapic(struct acpi_subtable_header * header, const unsigned long end) 255 { 256 struct acpi_madt_local_apic *processor = NULL; 257 258 processor = (struct acpi_madt_local_apic *)header; 259 260 if (BAD_MADT_ENTRY(processor, end)) 261 return -EINVAL; 262 263 acpi_table_print_madt_entry(header); 264 265 /* 266 * We need to register disabled CPU as well to permit 267 * counting disabled CPUs. This allows us to size 268 * cpus_possible_map more accurately, to permit 269 * to not preallocating memory for all NR_CPUS 270 * when we use CPU hotplug. 271 */ 272 acpi_register_lapic(processor->id, /* APIC ID */ 273 processor->lapic_flags & ACPI_MADT_ENABLED); 274 275 return 0; 276 } 277 278 static int __init 279 acpi_parse_sapic(struct acpi_subtable_header *header, const unsigned long end) 280 { 281 struct acpi_madt_local_sapic *processor = NULL; 282 283 processor = (struct acpi_madt_local_sapic *)header; 284 285 if (BAD_MADT_ENTRY(processor, end)) 286 return -EINVAL; 287 288 acpi_table_print_madt_entry(header); 289 290 acpi_register_lapic((processor->id << 8) | processor->eid,/* APIC ID */ 291 processor->lapic_flags & ACPI_MADT_ENABLED); 292 293 return 0; 294 } 295 296 static int __init 297 acpi_parse_lapic_addr_ovr(struct acpi_subtable_header * header, 298 const unsigned long end) 299 { 300 struct acpi_madt_local_apic_override *lapic_addr_ovr = NULL; 301 302 lapic_addr_ovr = (struct acpi_madt_local_apic_override *)header; 303 304 if (BAD_MADT_ENTRY(lapic_addr_ovr, end)) 305 return -EINVAL; 306 307 acpi_lapic_addr = lapic_addr_ovr->address; 308 309 return 0; 310 } 311 312 static int __init 313 acpi_parse_x2apic_nmi(struct acpi_subtable_header *header, 314 const unsigned long end) 315 { 316 struct acpi_madt_local_x2apic_nmi *x2apic_nmi = NULL; 317 318 x2apic_nmi = (struct acpi_madt_local_x2apic_nmi *)header; 319 320 if (BAD_MADT_ENTRY(x2apic_nmi, end)) 321 return -EINVAL; 322 323 acpi_table_print_madt_entry(header); 324 325 if (x2apic_nmi->lint != 1) 326 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n"); 327 328 return 0; 329 } 330 331 static int __init 332 acpi_parse_lapic_nmi(struct acpi_subtable_header * header, const unsigned long end) 333 { 334 struct acpi_madt_local_apic_nmi *lapic_nmi = NULL; 335 336 lapic_nmi = (struct acpi_madt_local_apic_nmi *)header; 337 338 if (BAD_MADT_ENTRY(lapic_nmi, end)) 339 return -EINVAL; 340 341 acpi_table_print_madt_entry(header); 342 343 if (lapic_nmi->lint != 1) 344 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n"); 345 346 return 0; 347 } 348 349 #endif /*CONFIG_X86_LOCAL_APIC */ 350 351 #ifdef CONFIG_X86_IO_APIC 352 353 static int __init 354 acpi_parse_ioapic(struct acpi_subtable_header * header, const unsigned long end) 355 { 356 struct acpi_madt_io_apic *ioapic = NULL; 357 358 ioapic = (struct acpi_madt_io_apic *)header; 359 360 if (BAD_MADT_ENTRY(ioapic, end)) 361 return -EINVAL; 362 363 acpi_table_print_madt_entry(header); 364 365 mp_register_ioapic(ioapic->id, 366 ioapic->address, ioapic->global_irq_base); 367 368 return 0; 369 } 370 371 /* 372 * Parse Interrupt Source Override for the ACPI SCI 373 */ 374 static void __init acpi_sci_ioapic_setup(u8 bus_irq, u16 polarity, u16 trigger, u32 gsi) 375 { 376 if (trigger == 0) /* compatible SCI trigger is level */ 377 trigger = 3; 378 379 if (polarity == 0) /* compatible SCI polarity is low */ 380 polarity = 3; 381 382 /* Command-line over-ride via acpi_sci= */ 383 if (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) 384 trigger = (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2; 385 386 if (acpi_sci_flags & ACPI_MADT_POLARITY_MASK) 387 polarity = acpi_sci_flags & ACPI_MADT_POLARITY_MASK; 388 389 /* 390 * mp_config_acpi_legacy_irqs() already setup IRQs < 16 391 * If GSI is < 16, this will update its flags, 392 * else it will create a new mp_irqs[] entry. 393 */ 394 mp_override_legacy_irq(bus_irq, polarity, trigger, gsi); 395 396 /* 397 * stash over-ride to indicate we've been here 398 * and for later update of acpi_gbl_FADT 399 */ 400 acpi_sci_override_gsi = gsi; 401 return; 402 } 403 404 static int __init 405 acpi_parse_int_src_ovr(struct acpi_subtable_header * header, 406 const unsigned long end) 407 { 408 struct acpi_madt_interrupt_override *intsrc = NULL; 409 410 intsrc = (struct acpi_madt_interrupt_override *)header; 411 412 if (BAD_MADT_ENTRY(intsrc, end)) 413 return -EINVAL; 414 415 acpi_table_print_madt_entry(header); 416 417 if (intsrc->source_irq == acpi_gbl_FADT.sci_interrupt) { 418 acpi_sci_ioapic_setup(intsrc->source_irq, 419 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK, 420 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2, 421 intsrc->global_irq); 422 return 0; 423 } 424 425 if (intsrc->source_irq == 0) { 426 if (acpi_skip_timer_override) { 427 printk(PREFIX "BIOS IRQ0 override ignored.\n"); 428 return 0; 429 } 430 431 if ((intsrc->global_irq == 2) && acpi_fix_pin2_polarity 432 && (intsrc->inti_flags & ACPI_MADT_POLARITY_MASK)) { 433 intsrc->inti_flags &= ~ACPI_MADT_POLARITY_MASK; 434 printk(PREFIX "BIOS IRQ0 pin2 override: forcing polarity to high active.\n"); 435 } 436 } 437 438 mp_override_legacy_irq(intsrc->source_irq, 439 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK, 440 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2, 441 intsrc->global_irq); 442 443 return 0; 444 } 445 446 static int __init 447 acpi_parse_nmi_src(struct acpi_subtable_header * header, const unsigned long end) 448 { 449 struct acpi_madt_nmi_source *nmi_src = NULL; 450 451 nmi_src = (struct acpi_madt_nmi_source *)header; 452 453 if (BAD_MADT_ENTRY(nmi_src, end)) 454 return -EINVAL; 455 456 acpi_table_print_madt_entry(header); 457 458 /* TBD: Support nimsrc entries? */ 459 460 return 0; 461 } 462 463 #endif /* CONFIG_X86_IO_APIC */ 464 465 /* 466 * acpi_pic_sci_set_trigger() 467 * 468 * use ELCR to set PIC-mode trigger type for SCI 469 * 470 * If a PIC-mode SCI is not recognized or gives spurious IRQ7's 471 * it may require Edge Trigger -- use "acpi_sci=edge" 472 * 473 * Port 0x4d0-4d1 are ECLR1 and ECLR2, the Edge/Level Control Registers 474 * for the 8259 PIC. bit[n] = 1 means irq[n] is Level, otherwise Edge. 475 * ECLR1 is IRQs 0-7 (IRQ 0, 1, 2 must be 0) 476 * ECLR2 is IRQs 8-15 (IRQ 8, 13 must be 0) 477 */ 478 479 void __init acpi_pic_sci_set_trigger(unsigned int irq, u16 trigger) 480 { 481 unsigned int mask = 1 << irq; 482 unsigned int old, new; 483 484 /* Real old ELCR mask */ 485 old = inb(0x4d0) | (inb(0x4d1) << 8); 486 487 /* 488 * If we use ACPI to set PCI IRQs, then we should clear ELCR 489 * since we will set it correctly as we enable the PCI irq 490 * routing. 491 */ 492 new = acpi_noirq ? old : 0; 493 494 /* 495 * Update SCI information in the ELCR, it isn't in the PCI 496 * routing tables.. 497 */ 498 switch (trigger) { 499 case 1: /* Edge - clear */ 500 new &= ~mask; 501 break; 502 case 3: /* Level - set */ 503 new |= mask; 504 break; 505 } 506 507 if (old == new) 508 return; 509 510 printk(PREFIX "setting ELCR to %04x (from %04x)\n", new, old); 511 outb(new, 0x4d0); 512 outb(new >> 8, 0x4d1); 513 } 514 515 int acpi_gsi_to_irq(u32 gsi, unsigned int *irq) 516 { 517 *irq = gsi_to_irq(gsi); 518 519 #ifdef CONFIG_X86_IO_APIC 520 if (acpi_irq_model == ACPI_IRQ_MODEL_IOAPIC) 521 setup_IO_APIC_irq_extra(gsi); 522 #endif 523 524 return 0; 525 } 526 EXPORT_SYMBOL_GPL(acpi_gsi_to_irq); 527 528 int acpi_isa_irq_to_gsi(unsigned isa_irq, u32 *gsi) 529 { 530 if (isa_irq >= 16) 531 return -1; 532 *gsi = irq_to_gsi(isa_irq); 533 return 0; 534 } 535 536 static int acpi_register_gsi_pic(struct device *dev, u32 gsi, 537 int trigger, int polarity) 538 { 539 #ifdef CONFIG_PCI 540 /* 541 * Make sure all (legacy) PCI IRQs are set as level-triggered. 542 */ 543 if (trigger == ACPI_LEVEL_SENSITIVE) 544 eisa_set_level_irq(gsi); 545 #endif 546 547 return gsi; 548 } 549 550 static int acpi_register_gsi_ioapic(struct device *dev, u32 gsi, 551 int trigger, int polarity) 552 { 553 #ifdef CONFIG_X86_IO_APIC 554 gsi = mp_register_gsi(dev, gsi, trigger, polarity); 555 #endif 556 557 return gsi; 558 } 559 560 int (*__acpi_register_gsi)(struct device *dev, u32 gsi, 561 int trigger, int polarity) = acpi_register_gsi_pic; 562 563 /* 564 * success: return IRQ number (>=0) 565 * failure: return < 0 566 */ 567 int acpi_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity) 568 { 569 unsigned int irq; 570 unsigned int plat_gsi = gsi; 571 572 plat_gsi = (*__acpi_register_gsi)(dev, gsi, trigger, polarity); 573 irq = gsi_to_irq(plat_gsi); 574 575 return irq; 576 } 577 578 void __init acpi_set_irq_model_pic(void) 579 { 580 acpi_irq_model = ACPI_IRQ_MODEL_PIC; 581 __acpi_register_gsi = acpi_register_gsi_pic; 582 acpi_ioapic = 0; 583 } 584 585 void __init acpi_set_irq_model_ioapic(void) 586 { 587 acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC; 588 __acpi_register_gsi = acpi_register_gsi_ioapic; 589 acpi_ioapic = 1; 590 } 591 592 /* 593 * ACPI based hotplug support for CPU 594 */ 595 #ifdef CONFIG_ACPI_HOTPLUG_CPU 596 #include <acpi/processor.h> 597 598 static void __cpuinit acpi_map_cpu2node(acpi_handle handle, int cpu, int physid) 599 { 600 #ifdef CONFIG_ACPI_NUMA 601 int nid; 602 603 nid = acpi_get_node(handle); 604 if (nid == -1 || !node_online(nid)) 605 return; 606 set_apicid_to_node(physid, nid); 607 numa_set_node(cpu, nid); 608 #endif 609 } 610 611 static int __cpuinit _acpi_map_lsapic(acpi_handle handle, int *pcpu) 612 { 613 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; 614 union acpi_object *obj; 615 struct acpi_madt_local_apic *lapic; 616 cpumask_var_t tmp_map, new_map; 617 u8 physid; 618 int cpu; 619 int retval = -ENOMEM; 620 621 if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer))) 622 return -EINVAL; 623 624 if (!buffer.length || !buffer.pointer) 625 return -EINVAL; 626 627 obj = buffer.pointer; 628 if (obj->type != ACPI_TYPE_BUFFER || 629 obj->buffer.length < sizeof(*lapic)) { 630 kfree(buffer.pointer); 631 return -EINVAL; 632 } 633 634 lapic = (struct acpi_madt_local_apic *)obj->buffer.pointer; 635 636 if (lapic->header.type != ACPI_MADT_TYPE_LOCAL_APIC || 637 !(lapic->lapic_flags & ACPI_MADT_ENABLED)) { 638 kfree(buffer.pointer); 639 return -EINVAL; 640 } 641 642 physid = lapic->id; 643 644 kfree(buffer.pointer); 645 buffer.length = ACPI_ALLOCATE_BUFFER; 646 buffer.pointer = NULL; 647 lapic = NULL; 648 649 if (!alloc_cpumask_var(&tmp_map, GFP_KERNEL)) 650 goto out; 651 652 if (!alloc_cpumask_var(&new_map, GFP_KERNEL)) 653 goto free_tmp_map; 654 655 cpumask_copy(tmp_map, cpu_present_mask); 656 acpi_register_lapic(physid, ACPI_MADT_ENABLED); 657 658 /* 659 * If mp_register_lapic successfully generates a new logical cpu 660 * number, then the following will get us exactly what was mapped 661 */ 662 cpumask_andnot(new_map, cpu_present_mask, tmp_map); 663 if (cpumask_empty(new_map)) { 664 printk ("Unable to map lapic to logical cpu number\n"); 665 retval = -EINVAL; 666 goto free_new_map; 667 } 668 669 acpi_processor_set_pdc(handle); 670 671 cpu = cpumask_first(new_map); 672 acpi_map_cpu2node(handle, cpu, physid); 673 674 *pcpu = cpu; 675 retval = 0; 676 677 free_new_map: 678 free_cpumask_var(new_map); 679 free_tmp_map: 680 free_cpumask_var(tmp_map); 681 out: 682 return retval; 683 } 684 685 /* wrapper to silence section mismatch warning */ 686 int __ref acpi_map_lsapic(acpi_handle handle, int *pcpu) 687 { 688 return _acpi_map_lsapic(handle, pcpu); 689 } 690 EXPORT_SYMBOL(acpi_map_lsapic); 691 692 int acpi_unmap_lsapic(int cpu) 693 { 694 per_cpu(x86_cpu_to_apicid, cpu) = -1; 695 set_cpu_present(cpu, false); 696 num_processors--; 697 698 return (0); 699 } 700 701 EXPORT_SYMBOL(acpi_unmap_lsapic); 702 #endif /* CONFIG_ACPI_HOTPLUG_CPU */ 703 704 int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base) 705 { 706 /* TBD */ 707 return -EINVAL; 708 } 709 710 EXPORT_SYMBOL(acpi_register_ioapic); 711 712 int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base) 713 { 714 /* TBD */ 715 return -EINVAL; 716 } 717 718 EXPORT_SYMBOL(acpi_unregister_ioapic); 719 720 static int __init acpi_parse_sbf(struct acpi_table_header *table) 721 { 722 struct acpi_table_boot *sb; 723 724 sb = (struct acpi_table_boot *)table; 725 if (!sb) { 726 printk(KERN_WARNING PREFIX "Unable to map SBF\n"); 727 return -ENODEV; 728 } 729 730 sbf_port = sb->cmos_index; /* Save CMOS port */ 731 732 return 0; 733 } 734 735 #ifdef CONFIG_HPET_TIMER 736 #include <asm/hpet.h> 737 738 static struct __initdata resource *hpet_res; 739 740 static int __init acpi_parse_hpet(struct acpi_table_header *table) 741 { 742 struct acpi_table_hpet *hpet_tbl; 743 744 hpet_tbl = (struct acpi_table_hpet *)table; 745 if (!hpet_tbl) { 746 printk(KERN_WARNING PREFIX "Unable to map HPET\n"); 747 return -ENODEV; 748 } 749 750 if (hpet_tbl->address.space_id != ACPI_SPACE_MEM) { 751 printk(KERN_WARNING PREFIX "HPET timers must be located in " 752 "memory.\n"); 753 return -1; 754 } 755 756 hpet_address = hpet_tbl->address.address; 757 hpet_blockid = hpet_tbl->sequence; 758 759 /* 760 * Some broken BIOSes advertise HPET at 0x0. We really do not 761 * want to allocate a resource there. 762 */ 763 if (!hpet_address) { 764 printk(KERN_WARNING PREFIX 765 "HPET id: %#x base: %#lx is invalid\n", 766 hpet_tbl->id, hpet_address); 767 return 0; 768 } 769 #ifdef CONFIG_X86_64 770 /* 771 * Some even more broken BIOSes advertise HPET at 772 * 0xfed0000000000000 instead of 0xfed00000. Fix it up and add 773 * some noise: 774 */ 775 if (hpet_address == 0xfed0000000000000UL) { 776 if (!hpet_force_user) { 777 printk(KERN_WARNING PREFIX "HPET id: %#x " 778 "base: 0xfed0000000000000 is bogus\n " 779 "try hpet=force on the kernel command line to " 780 "fix it up to 0xfed00000.\n", hpet_tbl->id); 781 hpet_address = 0; 782 return 0; 783 } 784 printk(KERN_WARNING PREFIX 785 "HPET id: %#x base: 0xfed0000000000000 fixed up " 786 "to 0xfed00000.\n", hpet_tbl->id); 787 hpet_address >>= 32; 788 } 789 #endif 790 printk(KERN_INFO PREFIX "HPET id: %#x base: %#lx\n", 791 hpet_tbl->id, hpet_address); 792 793 /* 794 * Allocate and initialize the HPET firmware resource for adding into 795 * the resource tree during the lateinit timeframe. 796 */ 797 #define HPET_RESOURCE_NAME_SIZE 9 798 hpet_res = alloc_bootmem(sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE); 799 800 hpet_res->name = (void *)&hpet_res[1]; 801 hpet_res->flags = IORESOURCE_MEM; 802 snprintf((char *)hpet_res->name, HPET_RESOURCE_NAME_SIZE, "HPET %u", 803 hpet_tbl->sequence); 804 805 hpet_res->start = hpet_address; 806 hpet_res->end = hpet_address + (1 * 1024) - 1; 807 808 return 0; 809 } 810 811 /* 812 * hpet_insert_resource inserts the HPET resources used into the resource 813 * tree. 814 */ 815 static __init int hpet_insert_resource(void) 816 { 817 if (!hpet_res) 818 return 1; 819 820 return insert_resource(&iomem_resource, hpet_res); 821 } 822 823 late_initcall(hpet_insert_resource); 824 825 #else 826 #define acpi_parse_hpet NULL 827 #endif 828 829 static int __init acpi_parse_fadt(struct acpi_table_header *table) 830 { 831 832 #ifdef CONFIG_X86_PM_TIMER 833 /* detect the location of the ACPI PM Timer */ 834 if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID) { 835 /* FADT rev. 2 */ 836 if (acpi_gbl_FADT.xpm_timer_block.space_id != 837 ACPI_ADR_SPACE_SYSTEM_IO) 838 return 0; 839 840 pmtmr_ioport = acpi_gbl_FADT.xpm_timer_block.address; 841 /* 842 * "X" fields are optional extensions to the original V1.0 843 * fields, so we must selectively expand V1.0 fields if the 844 * corresponding X field is zero. 845 */ 846 if (!pmtmr_ioport) 847 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block; 848 } else { 849 /* FADT rev. 1 */ 850 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block; 851 } 852 if (pmtmr_ioport) 853 printk(KERN_INFO PREFIX "PM-Timer IO Port: %#x\n", 854 pmtmr_ioport); 855 #endif 856 return 0; 857 } 858 859 #ifdef CONFIG_X86_LOCAL_APIC 860 /* 861 * Parse LAPIC entries in MADT 862 * returns 0 on success, < 0 on error 863 */ 864 865 static int __init early_acpi_parse_madt_lapic_addr_ovr(void) 866 { 867 int count; 868 869 if (!cpu_has_apic) 870 return -ENODEV; 871 872 /* 873 * Note that the LAPIC address is obtained from the MADT (32-bit value) 874 * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value). 875 */ 876 877 count = 878 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE, 879 acpi_parse_lapic_addr_ovr, 0); 880 if (count < 0) { 881 printk(KERN_ERR PREFIX 882 "Error parsing LAPIC address override entry\n"); 883 return count; 884 } 885 886 register_lapic_address(acpi_lapic_addr); 887 888 return count; 889 } 890 891 static int __init acpi_parse_madt_lapic_entries(void) 892 { 893 int count; 894 int x2count = 0; 895 896 if (!cpu_has_apic) 897 return -ENODEV; 898 899 /* 900 * Note that the LAPIC address is obtained from the MADT (32-bit value) 901 * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value). 902 */ 903 904 count = 905 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE, 906 acpi_parse_lapic_addr_ovr, 0); 907 if (count < 0) { 908 printk(KERN_ERR PREFIX 909 "Error parsing LAPIC address override entry\n"); 910 return count; 911 } 912 913 register_lapic_address(acpi_lapic_addr); 914 915 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC, 916 acpi_parse_sapic, MAX_LOCAL_APIC); 917 918 if (!count) { 919 x2count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC, 920 acpi_parse_x2apic, MAX_LOCAL_APIC); 921 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC, 922 acpi_parse_lapic, MAX_LOCAL_APIC); 923 } 924 if (!count && !x2count) { 925 printk(KERN_ERR PREFIX "No LAPIC entries present\n"); 926 /* TBD: Cleanup to allow fallback to MPS */ 927 return -ENODEV; 928 } else if (count < 0 || x2count < 0) { 929 printk(KERN_ERR PREFIX "Error parsing LAPIC entry\n"); 930 /* TBD: Cleanup to allow fallback to MPS */ 931 return count; 932 } 933 934 x2count = 935 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC_NMI, 936 acpi_parse_x2apic_nmi, 0); 937 count = 938 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI, acpi_parse_lapic_nmi, 0); 939 if (count < 0 || x2count < 0) { 940 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n"); 941 /* TBD: Cleanup to allow fallback to MPS */ 942 return count; 943 } 944 return 0; 945 } 946 #endif /* CONFIG_X86_LOCAL_APIC */ 947 948 #ifdef CONFIG_X86_IO_APIC 949 #define MP_ISA_BUS 0 950 951 #ifdef CONFIG_X86_ES7000 952 extern int es7000_plat; 953 #endif 954 955 void __init mp_override_legacy_irq(u8 bus_irq, u8 polarity, u8 trigger, u32 gsi) 956 { 957 int ioapic; 958 int pin; 959 struct mpc_intsrc mp_irq; 960 961 /* 962 * Convert 'gsi' to 'ioapic.pin'. 963 */ 964 ioapic = mp_find_ioapic(gsi); 965 if (ioapic < 0) 966 return; 967 pin = mp_find_ioapic_pin(ioapic, gsi); 968 969 /* 970 * TBD: This check is for faulty timer entries, where the override 971 * erroneously sets the trigger to level, resulting in a HUGE 972 * increase of timer interrupts! 973 */ 974 if ((bus_irq == 0) && (trigger == 3)) 975 trigger = 1; 976 977 mp_irq.type = MP_INTSRC; 978 mp_irq.irqtype = mp_INT; 979 mp_irq.irqflag = (trigger << 2) | polarity; 980 mp_irq.srcbus = MP_ISA_BUS; 981 mp_irq.srcbusirq = bus_irq; /* IRQ */ 982 mp_irq.dstapic = mpc_ioapic_id(ioapic); /* APIC ID */ 983 mp_irq.dstirq = pin; /* INTIN# */ 984 985 mp_save_irq(&mp_irq); 986 987 isa_irq_to_gsi[bus_irq] = gsi; 988 } 989 990 void __init mp_config_acpi_legacy_irqs(void) 991 { 992 int i; 993 struct mpc_intsrc mp_irq; 994 995 #ifdef CONFIG_EISA 996 /* 997 * Fabricate the legacy ISA bus (bus #31). 998 */ 999 mp_bus_id_to_type[MP_ISA_BUS] = MP_BUS_ISA; 1000 #endif 1001 set_bit(MP_ISA_BUS, mp_bus_not_pci); 1002 pr_debug("Bus #%d is ISA\n", MP_ISA_BUS); 1003 1004 #ifdef CONFIG_X86_ES7000 1005 /* 1006 * Older generations of ES7000 have no legacy identity mappings 1007 */ 1008 if (es7000_plat == 1) 1009 return; 1010 #endif 1011 1012 /* 1013 * Use the default configuration for the IRQs 0-15. Unless 1014 * overridden by (MADT) interrupt source override entries. 1015 */ 1016 for (i = 0; i < 16; i++) { 1017 int ioapic, pin; 1018 unsigned int dstapic; 1019 int idx; 1020 u32 gsi; 1021 1022 /* Locate the gsi that irq i maps to. */ 1023 if (acpi_isa_irq_to_gsi(i, &gsi)) 1024 continue; 1025 1026 /* 1027 * Locate the IOAPIC that manages the ISA IRQ. 1028 */ 1029 ioapic = mp_find_ioapic(gsi); 1030 if (ioapic < 0) 1031 continue; 1032 pin = mp_find_ioapic_pin(ioapic, gsi); 1033 dstapic = mpc_ioapic_id(ioapic); 1034 1035 for (idx = 0; idx < mp_irq_entries; idx++) { 1036 struct mpc_intsrc *irq = mp_irqs + idx; 1037 1038 /* Do we already have a mapping for this ISA IRQ? */ 1039 if (irq->srcbus == MP_ISA_BUS && irq->srcbusirq == i) 1040 break; 1041 1042 /* Do we already have a mapping for this IOAPIC pin */ 1043 if (irq->dstapic == dstapic && irq->dstirq == pin) 1044 break; 1045 } 1046 1047 if (idx != mp_irq_entries) { 1048 printk(KERN_DEBUG "ACPI: IRQ%d used by override.\n", i); 1049 continue; /* IRQ already used */ 1050 } 1051 1052 mp_irq.type = MP_INTSRC; 1053 mp_irq.irqflag = 0; /* Conforming */ 1054 mp_irq.srcbus = MP_ISA_BUS; 1055 mp_irq.dstapic = dstapic; 1056 mp_irq.irqtype = mp_INT; 1057 mp_irq.srcbusirq = i; /* Identity mapped */ 1058 mp_irq.dstirq = pin; 1059 1060 mp_save_irq(&mp_irq); 1061 } 1062 } 1063 1064 static int mp_config_acpi_gsi(struct device *dev, u32 gsi, int trigger, 1065 int polarity) 1066 { 1067 #ifdef CONFIG_X86_MPPARSE 1068 struct mpc_intsrc mp_irq; 1069 struct pci_dev *pdev; 1070 unsigned char number; 1071 unsigned int devfn; 1072 int ioapic; 1073 u8 pin; 1074 1075 if (!acpi_ioapic) 1076 return 0; 1077 if (!dev) 1078 return 0; 1079 if (dev->bus != &pci_bus_type) 1080 return 0; 1081 1082 pdev = to_pci_dev(dev); 1083 number = pdev->bus->number; 1084 devfn = pdev->devfn; 1085 pin = pdev->pin; 1086 /* print the entry should happen on mptable identically */ 1087 mp_irq.type = MP_INTSRC; 1088 mp_irq.irqtype = mp_INT; 1089 mp_irq.irqflag = (trigger == ACPI_EDGE_SENSITIVE ? 4 : 0x0c) | 1090 (polarity == ACPI_ACTIVE_HIGH ? 1 : 3); 1091 mp_irq.srcbus = number; 1092 mp_irq.srcbusirq = (((devfn >> 3) & 0x1f) << 2) | ((pin - 1) & 3); 1093 ioapic = mp_find_ioapic(gsi); 1094 mp_irq.dstapic = mpc_ioapic_id(ioapic); 1095 mp_irq.dstirq = mp_find_ioapic_pin(ioapic, gsi); 1096 1097 mp_save_irq(&mp_irq); 1098 #endif 1099 return 0; 1100 } 1101 1102 int mp_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity) 1103 { 1104 int ioapic; 1105 int ioapic_pin; 1106 struct io_apic_irq_attr irq_attr; 1107 1108 if (acpi_irq_model != ACPI_IRQ_MODEL_IOAPIC) 1109 return gsi; 1110 1111 /* Don't set up the ACPI SCI because it's already set up */ 1112 if (acpi_gbl_FADT.sci_interrupt == gsi) 1113 return gsi; 1114 1115 ioapic = mp_find_ioapic(gsi); 1116 if (ioapic < 0) { 1117 printk(KERN_WARNING "No IOAPIC for GSI %u\n", gsi); 1118 return gsi; 1119 } 1120 1121 ioapic_pin = mp_find_ioapic_pin(ioapic, gsi); 1122 1123 if (ioapic_pin > MP_MAX_IOAPIC_PIN) { 1124 printk(KERN_ERR "Invalid reference to IOAPIC pin " 1125 "%d-%d\n", mpc_ioapic_id(ioapic), 1126 ioapic_pin); 1127 return gsi; 1128 } 1129 1130 if (enable_update_mptable) 1131 mp_config_acpi_gsi(dev, gsi, trigger, polarity); 1132 1133 set_io_apic_irq_attr(&irq_attr, ioapic, ioapic_pin, 1134 trigger == ACPI_EDGE_SENSITIVE ? 0 : 1, 1135 polarity == ACPI_ACTIVE_HIGH ? 0 : 1); 1136 io_apic_set_pci_routing(dev, gsi_to_irq(gsi), &irq_attr); 1137 1138 return gsi; 1139 } 1140 1141 /* 1142 * Parse IOAPIC related entries in MADT 1143 * returns 0 on success, < 0 on error 1144 */ 1145 static int __init acpi_parse_madt_ioapic_entries(void) 1146 { 1147 int count; 1148 1149 /* 1150 * ACPI interpreter is required to complete interrupt setup, 1151 * so if it is off, don't enumerate the io-apics with ACPI. 1152 * If MPS is present, it will handle them, 1153 * otherwise the system will stay in PIC mode 1154 */ 1155 if (acpi_disabled || acpi_noirq) 1156 return -ENODEV; 1157 1158 if (!cpu_has_apic) 1159 return -ENODEV; 1160 1161 /* 1162 * if "noapic" boot option, don't look for IO-APICs 1163 */ 1164 if (skip_ioapic_setup) { 1165 printk(KERN_INFO PREFIX "Skipping IOAPIC probe " 1166 "due to 'noapic' option.\n"); 1167 return -ENODEV; 1168 } 1169 1170 count = 1171 acpi_table_parse_madt(ACPI_MADT_TYPE_IO_APIC, acpi_parse_ioapic, 1172 MAX_IO_APICS); 1173 if (!count) { 1174 printk(KERN_ERR PREFIX "No IOAPIC entries present\n"); 1175 return -ENODEV; 1176 } else if (count < 0) { 1177 printk(KERN_ERR PREFIX "Error parsing IOAPIC entry\n"); 1178 return count; 1179 } 1180 1181 count = 1182 acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE, acpi_parse_int_src_ovr, 1183 nr_irqs); 1184 if (count < 0) { 1185 printk(KERN_ERR PREFIX 1186 "Error parsing interrupt source overrides entry\n"); 1187 /* TBD: Cleanup to allow fallback to MPS */ 1188 return count; 1189 } 1190 1191 /* 1192 * If BIOS did not supply an INT_SRC_OVR for the SCI 1193 * pretend we got one so we can set the SCI flags. 1194 */ 1195 if (!acpi_sci_override_gsi) 1196 acpi_sci_ioapic_setup(acpi_gbl_FADT.sci_interrupt, 0, 0, 1197 acpi_gbl_FADT.sci_interrupt); 1198 1199 /* Fill in identity legacy mappings where no override */ 1200 mp_config_acpi_legacy_irqs(); 1201 1202 count = 1203 acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE, acpi_parse_nmi_src, 1204 nr_irqs); 1205 if (count < 0) { 1206 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n"); 1207 /* TBD: Cleanup to allow fallback to MPS */ 1208 return count; 1209 } 1210 1211 return 0; 1212 } 1213 #else 1214 static inline int acpi_parse_madt_ioapic_entries(void) 1215 { 1216 return -1; 1217 } 1218 #endif /* !CONFIG_X86_IO_APIC */ 1219 1220 static void __init early_acpi_process_madt(void) 1221 { 1222 #ifdef CONFIG_X86_LOCAL_APIC 1223 int error; 1224 1225 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) { 1226 1227 /* 1228 * Parse MADT LAPIC entries 1229 */ 1230 error = early_acpi_parse_madt_lapic_addr_ovr(); 1231 if (!error) { 1232 acpi_lapic = 1; 1233 smp_found_config = 1; 1234 } 1235 if (error == -EINVAL) { 1236 /* 1237 * Dell Precision Workstation 410, 610 come here. 1238 */ 1239 printk(KERN_ERR PREFIX 1240 "Invalid BIOS MADT, disabling ACPI\n"); 1241 disable_acpi(); 1242 } 1243 } 1244 #endif 1245 } 1246 1247 static void __init acpi_process_madt(void) 1248 { 1249 #ifdef CONFIG_X86_LOCAL_APIC 1250 int error; 1251 1252 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) { 1253 1254 /* 1255 * Parse MADT LAPIC entries 1256 */ 1257 error = acpi_parse_madt_lapic_entries(); 1258 if (!error) { 1259 acpi_lapic = 1; 1260 1261 /* 1262 * Parse MADT IO-APIC entries 1263 */ 1264 error = acpi_parse_madt_ioapic_entries(); 1265 if (!error) { 1266 acpi_set_irq_model_ioapic(); 1267 1268 smp_found_config = 1; 1269 } 1270 } 1271 if (error == -EINVAL) { 1272 /* 1273 * Dell Precision Workstation 410, 610 come here. 1274 */ 1275 printk(KERN_ERR PREFIX 1276 "Invalid BIOS MADT, disabling ACPI\n"); 1277 disable_acpi(); 1278 } 1279 } else { 1280 /* 1281 * ACPI found no MADT, and so ACPI wants UP PIC mode. 1282 * In the event an MPS table was found, forget it. 1283 * Boot with "acpi=off" to use MPS on such a system. 1284 */ 1285 if (smp_found_config) { 1286 printk(KERN_WARNING PREFIX 1287 "No APIC-table, disabling MPS\n"); 1288 smp_found_config = 0; 1289 } 1290 } 1291 1292 /* 1293 * ACPI supports both logical (e.g. Hyper-Threading) and physical 1294 * processors, where MPS only supports physical. 1295 */ 1296 if (acpi_lapic && acpi_ioapic) 1297 printk(KERN_INFO "Using ACPI (MADT) for SMP configuration " 1298 "information\n"); 1299 else if (acpi_lapic) 1300 printk(KERN_INFO "Using ACPI for processor (LAPIC) " 1301 "configuration information\n"); 1302 #endif 1303 return; 1304 } 1305 1306 static int __init disable_acpi_irq(const struct dmi_system_id *d) 1307 { 1308 if (!acpi_force) { 1309 printk(KERN_NOTICE "%s detected: force use of acpi=noirq\n", 1310 d->ident); 1311 acpi_noirq_set(); 1312 } 1313 return 0; 1314 } 1315 1316 static int __init disable_acpi_pci(const struct dmi_system_id *d) 1317 { 1318 if (!acpi_force) { 1319 printk(KERN_NOTICE "%s detected: force use of pci=noacpi\n", 1320 d->ident); 1321 acpi_disable_pci(); 1322 } 1323 return 0; 1324 } 1325 1326 static int __init dmi_disable_acpi(const struct dmi_system_id *d) 1327 { 1328 if (!acpi_force) { 1329 printk(KERN_NOTICE "%s detected: acpi off\n", d->ident); 1330 disable_acpi(); 1331 } else { 1332 printk(KERN_NOTICE 1333 "Warning: DMI blacklist says broken, but acpi forced\n"); 1334 } 1335 return 0; 1336 } 1337 1338 /* 1339 * Force ignoring BIOS IRQ0 override 1340 */ 1341 static int __init dmi_ignore_irq0_timer_override(const struct dmi_system_id *d) 1342 { 1343 if (!acpi_skip_timer_override) { 1344 pr_notice("%s detected: Ignoring BIOS IRQ0 override\n", 1345 d->ident); 1346 acpi_skip_timer_override = 1; 1347 } 1348 return 0; 1349 } 1350 1351 /* 1352 * If your system is blacklisted here, but you find that acpi=force 1353 * works for you, please contact linux-acpi@vger.kernel.org 1354 */ 1355 static struct dmi_system_id __initdata acpi_dmi_table[] = { 1356 /* 1357 * Boxes that need ACPI disabled 1358 */ 1359 { 1360 .callback = dmi_disable_acpi, 1361 .ident = "IBM Thinkpad", 1362 .matches = { 1363 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), 1364 DMI_MATCH(DMI_BOARD_NAME, "2629H1G"), 1365 }, 1366 }, 1367 1368 /* 1369 * Boxes that need ACPI PCI IRQ routing disabled 1370 */ 1371 { 1372 .callback = disable_acpi_irq, 1373 .ident = "ASUS A7V", 1374 .matches = { 1375 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC"), 1376 DMI_MATCH(DMI_BOARD_NAME, "<A7V>"), 1377 /* newer BIOS, Revision 1011, does work */ 1378 DMI_MATCH(DMI_BIOS_VERSION, 1379 "ASUS A7V ACPI BIOS Revision 1007"), 1380 }, 1381 }, 1382 { 1383 /* 1384 * Latest BIOS for IBM 600E (1.16) has bad pcinum 1385 * for LPC bridge, which is needed for the PCI 1386 * interrupt links to work. DSDT fix is in bug 5966. 1387 * 2645, 2646 model numbers are shared with 600/600E/600X 1388 */ 1389 .callback = disable_acpi_irq, 1390 .ident = "IBM Thinkpad 600 Series 2645", 1391 .matches = { 1392 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), 1393 DMI_MATCH(DMI_BOARD_NAME, "2645"), 1394 }, 1395 }, 1396 { 1397 .callback = disable_acpi_irq, 1398 .ident = "IBM Thinkpad 600 Series 2646", 1399 .matches = { 1400 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), 1401 DMI_MATCH(DMI_BOARD_NAME, "2646"), 1402 }, 1403 }, 1404 /* 1405 * Boxes that need ACPI PCI IRQ routing and PCI scan disabled 1406 */ 1407 { /* _BBN 0 bug */ 1408 .callback = disable_acpi_pci, 1409 .ident = "ASUS PR-DLS", 1410 .matches = { 1411 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."), 1412 DMI_MATCH(DMI_BOARD_NAME, "PR-DLS"), 1413 DMI_MATCH(DMI_BIOS_VERSION, 1414 "ASUS PR-DLS ACPI BIOS Revision 1010"), 1415 DMI_MATCH(DMI_BIOS_DATE, "03/21/2003") 1416 }, 1417 }, 1418 { 1419 .callback = disable_acpi_pci, 1420 .ident = "Acer TravelMate 36x Laptop", 1421 .matches = { 1422 DMI_MATCH(DMI_SYS_VENDOR, "Acer"), 1423 DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"), 1424 }, 1425 }, 1426 {} 1427 }; 1428 1429 /* second table for DMI checks that should run after early-quirks */ 1430 static struct dmi_system_id __initdata acpi_dmi_table_late[] = { 1431 /* 1432 * HP laptops which use a DSDT reporting as HP/SB400/10000, 1433 * which includes some code which overrides all temperature 1434 * trip points to 16C if the INTIN2 input of the I/O APIC 1435 * is enabled. This input is incorrectly designated the 1436 * ISA IRQ 0 via an interrupt source override even though 1437 * it is wired to the output of the master 8259A and INTIN0 1438 * is not connected at all. Force ignoring BIOS IRQ0 1439 * override in that cases. 1440 */ 1441 { 1442 .callback = dmi_ignore_irq0_timer_override, 1443 .ident = "HP nx6115 laptop", 1444 .matches = { 1445 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 1446 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6115"), 1447 }, 1448 }, 1449 { 1450 .callback = dmi_ignore_irq0_timer_override, 1451 .ident = "HP NX6125 laptop", 1452 .matches = { 1453 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 1454 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6125"), 1455 }, 1456 }, 1457 { 1458 .callback = dmi_ignore_irq0_timer_override, 1459 .ident = "HP NX6325 laptop", 1460 .matches = { 1461 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 1462 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6325"), 1463 }, 1464 }, 1465 { 1466 .callback = dmi_ignore_irq0_timer_override, 1467 .ident = "HP 6715b laptop", 1468 .matches = { 1469 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 1470 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq 6715b"), 1471 }, 1472 }, 1473 { 1474 .callback = dmi_ignore_irq0_timer_override, 1475 .ident = "FUJITSU SIEMENS", 1476 .matches = { 1477 DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"), 1478 DMI_MATCH(DMI_PRODUCT_NAME, "AMILO PRO V2030"), 1479 }, 1480 }, 1481 {} 1482 }; 1483 1484 /* 1485 * acpi_boot_table_init() and acpi_boot_init() 1486 * called from setup_arch(), always. 1487 * 1. checksums all tables 1488 * 2. enumerates lapics 1489 * 3. enumerates io-apics 1490 * 1491 * acpi_table_init() is separate to allow reading SRAT without 1492 * other side effects. 1493 * 1494 * side effects of acpi_boot_init: 1495 * acpi_lapic = 1 if LAPIC found 1496 * acpi_ioapic = 1 if IOAPIC found 1497 * if (acpi_lapic && acpi_ioapic) smp_found_config = 1; 1498 * if acpi_blacklisted() acpi_disabled = 1; 1499 * acpi_irq_model=... 1500 * ... 1501 */ 1502 1503 void __init acpi_boot_table_init(void) 1504 { 1505 dmi_check_system(acpi_dmi_table); 1506 1507 /* 1508 * If acpi_disabled, bail out 1509 */ 1510 if (acpi_disabled) 1511 return; 1512 1513 /* 1514 * Initialize the ACPI boot-time table parser. 1515 */ 1516 if (acpi_table_init()) { 1517 disable_acpi(); 1518 return; 1519 } 1520 1521 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf); 1522 1523 /* 1524 * blacklist may disable ACPI entirely 1525 */ 1526 if (acpi_blacklisted()) { 1527 if (acpi_force) { 1528 printk(KERN_WARNING PREFIX "acpi=force override\n"); 1529 } else { 1530 printk(KERN_WARNING PREFIX "Disabling ACPI support\n"); 1531 disable_acpi(); 1532 return; 1533 } 1534 } 1535 } 1536 1537 int __init early_acpi_boot_init(void) 1538 { 1539 /* 1540 * If acpi_disabled, bail out 1541 */ 1542 if (acpi_disabled) 1543 return 1; 1544 1545 /* 1546 * Process the Multiple APIC Description Table (MADT), if present 1547 */ 1548 early_acpi_process_madt(); 1549 1550 return 0; 1551 } 1552 1553 int __init acpi_boot_init(void) 1554 { 1555 /* those are executed after early-quirks are executed */ 1556 dmi_check_system(acpi_dmi_table_late); 1557 1558 /* 1559 * If acpi_disabled, bail out 1560 */ 1561 if (acpi_disabled) 1562 return 1; 1563 1564 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf); 1565 1566 /* 1567 * set sci_int and PM timer address 1568 */ 1569 acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt); 1570 1571 /* 1572 * Process the Multiple APIC Description Table (MADT), if present 1573 */ 1574 acpi_process_madt(); 1575 1576 acpi_table_parse(ACPI_SIG_HPET, acpi_parse_hpet); 1577 1578 if (!acpi_noirq) 1579 x86_init.pci.init = pci_acpi_init; 1580 1581 return 0; 1582 } 1583 1584 static int __init parse_acpi(char *arg) 1585 { 1586 if (!arg) 1587 return -EINVAL; 1588 1589 /* "acpi=off" disables both ACPI table parsing and interpreter */ 1590 if (strcmp(arg, "off") == 0) { 1591 disable_acpi(); 1592 } 1593 /* acpi=force to over-ride black-list */ 1594 else if (strcmp(arg, "force") == 0) { 1595 acpi_force = 1; 1596 acpi_disabled = 0; 1597 } 1598 /* acpi=strict disables out-of-spec workarounds */ 1599 else if (strcmp(arg, "strict") == 0) { 1600 acpi_strict = 1; 1601 } 1602 /* acpi=rsdt use RSDT instead of XSDT */ 1603 else if (strcmp(arg, "rsdt") == 0) { 1604 acpi_rsdt_forced = 1; 1605 } 1606 /* "acpi=noirq" disables ACPI interrupt routing */ 1607 else if (strcmp(arg, "noirq") == 0) { 1608 acpi_noirq_set(); 1609 } 1610 /* "acpi=copy_dsdt" copys DSDT */ 1611 else if (strcmp(arg, "copy_dsdt") == 0) { 1612 acpi_gbl_copy_dsdt_locally = 1; 1613 } else { 1614 /* Core will printk when we return error. */ 1615 return -EINVAL; 1616 } 1617 return 0; 1618 } 1619 early_param("acpi", parse_acpi); 1620 1621 /* FIXME: Using pci= for an ACPI parameter is a travesty. */ 1622 static int __init parse_pci(char *arg) 1623 { 1624 if (arg && strcmp(arg, "noacpi") == 0) 1625 acpi_disable_pci(); 1626 return 0; 1627 } 1628 early_param("pci", parse_pci); 1629 1630 int __init acpi_mps_check(void) 1631 { 1632 #if defined(CONFIG_X86_LOCAL_APIC) && !defined(CONFIG_X86_MPPARSE) 1633 /* mptable code is not built-in*/ 1634 if (acpi_disabled || acpi_noirq) { 1635 printk(KERN_WARNING "MPS support code is not built-in.\n" 1636 "Using acpi=off or acpi=noirq or pci=noacpi " 1637 "may have problem\n"); 1638 return 1; 1639 } 1640 #endif 1641 return 0; 1642 } 1643 1644 #ifdef CONFIG_X86_IO_APIC 1645 static int __init parse_acpi_skip_timer_override(char *arg) 1646 { 1647 acpi_skip_timer_override = 1; 1648 return 0; 1649 } 1650 early_param("acpi_skip_timer_override", parse_acpi_skip_timer_override); 1651 1652 static int __init parse_acpi_use_timer_override(char *arg) 1653 { 1654 acpi_use_timer_override = 1; 1655 return 0; 1656 } 1657 early_param("acpi_use_timer_override", parse_acpi_use_timer_override); 1658 #endif /* CONFIG_X86_IO_APIC */ 1659 1660 static int __init setup_acpi_sci(char *s) 1661 { 1662 if (!s) 1663 return -EINVAL; 1664 if (!strcmp(s, "edge")) 1665 acpi_sci_flags = ACPI_MADT_TRIGGER_EDGE | 1666 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK); 1667 else if (!strcmp(s, "level")) 1668 acpi_sci_flags = ACPI_MADT_TRIGGER_LEVEL | 1669 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK); 1670 else if (!strcmp(s, "high")) 1671 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_HIGH | 1672 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK); 1673 else if (!strcmp(s, "low")) 1674 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_LOW | 1675 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK); 1676 else 1677 return -EINVAL; 1678 return 0; 1679 } 1680 early_param("acpi_sci", setup_acpi_sci); 1681 1682 int __acpi_acquire_global_lock(unsigned int *lock) 1683 { 1684 unsigned int old, new, val; 1685 do { 1686 old = *lock; 1687 new = (((old & ~0x3) + 2) + ((old >> 1) & 0x1)); 1688 val = cmpxchg(lock, old, new); 1689 } while (unlikely (val != old)); 1690 return (new < 3) ? -1 : 0; 1691 } 1692 1693 int __acpi_release_global_lock(unsigned int *lock) 1694 { 1695 unsigned int old, new, val; 1696 do { 1697 old = *lock; 1698 new = old & ~0x3; 1699 val = cmpxchg(lock, old, new); 1700 } while (unlikely (val != old)); 1701 return old & 0x1; 1702 } 1703