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 && intsrc->global_irq == 2) { 426 if (acpi_skip_timer_override) { 427 printk(PREFIX "BIOS IRQ0 pin2 override ignored.\n"); 428 return 0; 429 } 430 if (acpi_fix_pin2_polarity && (intsrc->inti_flags & ACPI_MADT_POLARITY_MASK)) { 431 intsrc->inti_flags &= ~ACPI_MADT_POLARITY_MASK; 432 printk(PREFIX "BIOS IRQ0 pin2 override: forcing polarity to high active.\n"); 433 } 434 } 435 436 mp_override_legacy_irq(intsrc->source_irq, 437 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK, 438 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2, 439 intsrc->global_irq); 440 441 return 0; 442 } 443 444 static int __init 445 acpi_parse_nmi_src(struct acpi_subtable_header * header, const unsigned long end) 446 { 447 struct acpi_madt_nmi_source *nmi_src = NULL; 448 449 nmi_src = (struct acpi_madt_nmi_source *)header; 450 451 if (BAD_MADT_ENTRY(nmi_src, end)) 452 return -EINVAL; 453 454 acpi_table_print_madt_entry(header); 455 456 /* TBD: Support nimsrc entries? */ 457 458 return 0; 459 } 460 461 #endif /* CONFIG_X86_IO_APIC */ 462 463 /* 464 * acpi_pic_sci_set_trigger() 465 * 466 * use ELCR to set PIC-mode trigger type for SCI 467 * 468 * If a PIC-mode SCI is not recognized or gives spurious IRQ7's 469 * it may require Edge Trigger -- use "acpi_sci=edge" 470 * 471 * Port 0x4d0-4d1 are ECLR1 and ECLR2, the Edge/Level Control Registers 472 * for the 8259 PIC. bit[n] = 1 means irq[n] is Level, otherwise Edge. 473 * ECLR1 is IRQs 0-7 (IRQ 0, 1, 2 must be 0) 474 * ECLR2 is IRQs 8-15 (IRQ 8, 13 must be 0) 475 */ 476 477 void __init acpi_pic_sci_set_trigger(unsigned int irq, u16 trigger) 478 { 479 unsigned int mask = 1 << irq; 480 unsigned int old, new; 481 482 /* Real old ELCR mask */ 483 old = inb(0x4d0) | (inb(0x4d1) << 8); 484 485 /* 486 * If we use ACPI to set PCI IRQs, then we should clear ELCR 487 * since we will set it correctly as we enable the PCI irq 488 * routing. 489 */ 490 new = acpi_noirq ? old : 0; 491 492 /* 493 * Update SCI information in the ELCR, it isn't in the PCI 494 * routing tables.. 495 */ 496 switch (trigger) { 497 case 1: /* Edge - clear */ 498 new &= ~mask; 499 break; 500 case 3: /* Level - set */ 501 new |= mask; 502 break; 503 } 504 505 if (old == new) 506 return; 507 508 printk(PREFIX "setting ELCR to %04x (from %04x)\n", new, old); 509 outb(new, 0x4d0); 510 outb(new >> 8, 0x4d1); 511 } 512 513 int acpi_gsi_to_irq(u32 gsi, unsigned int *irq) 514 { 515 *irq = gsi_to_irq(gsi); 516 517 #ifdef CONFIG_X86_IO_APIC 518 if (acpi_irq_model == ACPI_IRQ_MODEL_IOAPIC) 519 setup_IO_APIC_irq_extra(gsi); 520 #endif 521 522 return 0; 523 } 524 EXPORT_SYMBOL_GPL(acpi_gsi_to_irq); 525 526 int acpi_isa_irq_to_gsi(unsigned isa_irq, u32 *gsi) 527 { 528 if (isa_irq >= 16) 529 return -1; 530 *gsi = irq_to_gsi(isa_irq); 531 return 0; 532 } 533 534 static int acpi_register_gsi_pic(struct device *dev, u32 gsi, 535 int trigger, int polarity) 536 { 537 #ifdef CONFIG_PCI 538 /* 539 * Make sure all (legacy) PCI IRQs are set as level-triggered. 540 */ 541 if (trigger == ACPI_LEVEL_SENSITIVE) 542 eisa_set_level_irq(gsi); 543 #endif 544 545 return gsi; 546 } 547 548 static int acpi_register_gsi_ioapic(struct device *dev, u32 gsi, 549 int trigger, int polarity) 550 { 551 #ifdef CONFIG_X86_IO_APIC 552 gsi = mp_register_gsi(dev, gsi, trigger, polarity); 553 #endif 554 555 return gsi; 556 } 557 558 int (*__acpi_register_gsi)(struct device *dev, u32 gsi, 559 int trigger, int polarity) = acpi_register_gsi_pic; 560 561 /* 562 * success: return IRQ number (>=0) 563 * failure: return < 0 564 */ 565 int acpi_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity) 566 { 567 unsigned int irq; 568 unsigned int plat_gsi = gsi; 569 570 plat_gsi = (*__acpi_register_gsi)(dev, gsi, trigger, polarity); 571 irq = gsi_to_irq(plat_gsi); 572 573 return irq; 574 } 575 576 void __init acpi_set_irq_model_pic(void) 577 { 578 acpi_irq_model = ACPI_IRQ_MODEL_PIC; 579 __acpi_register_gsi = acpi_register_gsi_pic; 580 acpi_ioapic = 0; 581 } 582 583 void __init acpi_set_irq_model_ioapic(void) 584 { 585 acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC; 586 __acpi_register_gsi = acpi_register_gsi_ioapic; 587 acpi_ioapic = 1; 588 } 589 590 /* 591 * ACPI based hotplug support for CPU 592 */ 593 #ifdef CONFIG_ACPI_HOTPLUG_CPU 594 #include <acpi/processor.h> 595 596 static void __cpuinit acpi_map_cpu2node(acpi_handle handle, int cpu, int physid) 597 { 598 #ifdef CONFIG_ACPI_NUMA 599 int nid; 600 601 nid = acpi_get_node(handle); 602 if (nid == -1 || !node_online(nid)) 603 return; 604 set_apicid_to_node(physid, nid); 605 numa_set_node(cpu, nid); 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 lapic = NULL; 646 647 if (!alloc_cpumask_var(&tmp_map, GFP_KERNEL)) 648 goto out; 649 650 if (!alloc_cpumask_var(&new_map, GFP_KERNEL)) 651 goto free_tmp_map; 652 653 cpumask_copy(tmp_map, cpu_present_mask); 654 acpi_register_lapic(physid, ACPI_MADT_ENABLED); 655 656 /* 657 * If mp_register_lapic successfully generates a new logical cpu 658 * number, then the following will get us exactly what was mapped 659 */ 660 cpumask_andnot(new_map, cpu_present_mask, tmp_map); 661 if (cpumask_empty(new_map)) { 662 printk ("Unable to map lapic to logical cpu number\n"); 663 retval = -EINVAL; 664 goto free_new_map; 665 } 666 667 acpi_processor_set_pdc(handle); 668 669 cpu = cpumask_first(new_map); 670 acpi_map_cpu2node(handle, cpu, physid); 671 672 *pcpu = cpu; 673 retval = 0; 674 675 free_new_map: 676 free_cpumask_var(new_map); 677 free_tmp_map: 678 free_cpumask_var(tmp_map); 679 out: 680 return retval; 681 } 682 683 /* wrapper to silence section mismatch warning */ 684 int __ref acpi_map_lsapic(acpi_handle handle, int *pcpu) 685 { 686 return _acpi_map_lsapic(handle, pcpu); 687 } 688 EXPORT_SYMBOL(acpi_map_lsapic); 689 690 int acpi_unmap_lsapic(int cpu) 691 { 692 per_cpu(x86_cpu_to_apicid, cpu) = -1; 693 set_cpu_present(cpu, false); 694 num_processors--; 695 696 return (0); 697 } 698 699 EXPORT_SYMBOL(acpi_unmap_lsapic); 700 #endif /* CONFIG_ACPI_HOTPLUG_CPU */ 701 702 int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base) 703 { 704 /* TBD */ 705 return -EINVAL; 706 } 707 708 EXPORT_SYMBOL(acpi_register_ioapic); 709 710 int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base) 711 { 712 /* TBD */ 713 return -EINVAL; 714 } 715 716 EXPORT_SYMBOL(acpi_unregister_ioapic); 717 718 static int __init acpi_parse_sbf(struct acpi_table_header *table) 719 { 720 struct acpi_table_boot *sb; 721 722 sb = (struct acpi_table_boot *)table; 723 if (!sb) { 724 printk(KERN_WARNING PREFIX "Unable to map SBF\n"); 725 return -ENODEV; 726 } 727 728 sbf_port = sb->cmos_index; /* Save CMOS port */ 729 730 return 0; 731 } 732 733 #ifdef CONFIG_HPET_TIMER 734 #include <asm/hpet.h> 735 736 static struct __initdata resource *hpet_res; 737 738 static int __init acpi_parse_hpet(struct acpi_table_header *table) 739 { 740 struct acpi_table_hpet *hpet_tbl; 741 742 hpet_tbl = (struct acpi_table_hpet *)table; 743 if (!hpet_tbl) { 744 printk(KERN_WARNING PREFIX "Unable to map HPET\n"); 745 return -ENODEV; 746 } 747 748 if (hpet_tbl->address.space_id != ACPI_SPACE_MEM) { 749 printk(KERN_WARNING PREFIX "HPET timers must be located in " 750 "memory.\n"); 751 return -1; 752 } 753 754 hpet_address = hpet_tbl->address.address; 755 hpet_blockid = hpet_tbl->sequence; 756 757 /* 758 * Some broken BIOSes advertise HPET at 0x0. We really do not 759 * want to allocate a resource there. 760 */ 761 if (!hpet_address) { 762 printk(KERN_WARNING PREFIX 763 "HPET id: %#x base: %#lx is invalid\n", 764 hpet_tbl->id, hpet_address); 765 return 0; 766 } 767 #ifdef CONFIG_X86_64 768 /* 769 * Some even more broken BIOSes advertise HPET at 770 * 0xfed0000000000000 instead of 0xfed00000. Fix it up and add 771 * some noise: 772 */ 773 if (hpet_address == 0xfed0000000000000UL) { 774 if (!hpet_force_user) { 775 printk(KERN_WARNING PREFIX "HPET id: %#x " 776 "base: 0xfed0000000000000 is bogus\n " 777 "try hpet=force on the kernel command line to " 778 "fix it up to 0xfed00000.\n", hpet_tbl->id); 779 hpet_address = 0; 780 return 0; 781 } 782 printk(KERN_WARNING PREFIX 783 "HPET id: %#x base: 0xfed0000000000000 fixed up " 784 "to 0xfed00000.\n", hpet_tbl->id); 785 hpet_address >>= 32; 786 } 787 #endif 788 printk(KERN_INFO PREFIX "HPET id: %#x base: %#lx\n", 789 hpet_tbl->id, hpet_address); 790 791 /* 792 * Allocate and initialize the HPET firmware resource for adding into 793 * the resource tree during the lateinit timeframe. 794 */ 795 #define HPET_RESOURCE_NAME_SIZE 9 796 hpet_res = alloc_bootmem(sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE); 797 798 hpet_res->name = (void *)&hpet_res[1]; 799 hpet_res->flags = IORESOURCE_MEM; 800 snprintf((char *)hpet_res->name, HPET_RESOURCE_NAME_SIZE, "HPET %u", 801 hpet_tbl->sequence); 802 803 hpet_res->start = hpet_address; 804 hpet_res->end = hpet_address + (1 * 1024) - 1; 805 806 return 0; 807 } 808 809 /* 810 * hpet_insert_resource inserts the HPET resources used into the resource 811 * tree. 812 */ 813 static __init int hpet_insert_resource(void) 814 { 815 if (!hpet_res) 816 return 1; 817 818 return insert_resource(&iomem_resource, hpet_res); 819 } 820 821 late_initcall(hpet_insert_resource); 822 823 #else 824 #define acpi_parse_hpet NULL 825 #endif 826 827 static int __init acpi_parse_fadt(struct acpi_table_header *table) 828 { 829 830 #ifdef CONFIG_X86_PM_TIMER 831 /* detect the location of the ACPI PM Timer */ 832 if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID) { 833 /* FADT rev. 2 */ 834 if (acpi_gbl_FADT.xpm_timer_block.space_id != 835 ACPI_ADR_SPACE_SYSTEM_IO) 836 return 0; 837 838 pmtmr_ioport = acpi_gbl_FADT.xpm_timer_block.address; 839 /* 840 * "X" fields are optional extensions to the original V1.0 841 * fields, so we must selectively expand V1.0 fields if the 842 * corresponding X field is zero. 843 */ 844 if (!pmtmr_ioport) 845 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block; 846 } else { 847 /* FADT rev. 1 */ 848 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block; 849 } 850 if (pmtmr_ioport) 851 printk(KERN_INFO PREFIX "PM-Timer IO Port: %#x\n", 852 pmtmr_ioport); 853 #endif 854 return 0; 855 } 856 857 #ifdef CONFIG_X86_LOCAL_APIC 858 /* 859 * Parse LAPIC entries in MADT 860 * returns 0 on success, < 0 on error 861 */ 862 863 static int __init early_acpi_parse_madt_lapic_addr_ovr(void) 864 { 865 int count; 866 867 if (!cpu_has_apic) 868 return -ENODEV; 869 870 /* 871 * Note that the LAPIC address is obtained from the MADT (32-bit value) 872 * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value). 873 */ 874 875 count = 876 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE, 877 acpi_parse_lapic_addr_ovr, 0); 878 if (count < 0) { 879 printk(KERN_ERR PREFIX 880 "Error parsing LAPIC address override entry\n"); 881 return count; 882 } 883 884 register_lapic_address(acpi_lapic_addr); 885 886 return count; 887 } 888 889 static int __init acpi_parse_madt_lapic_entries(void) 890 { 891 int count; 892 int x2count = 0; 893 894 if (!cpu_has_apic) 895 return -ENODEV; 896 897 /* 898 * Note that the LAPIC address is obtained from the MADT (32-bit value) 899 * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value). 900 */ 901 902 count = 903 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE, 904 acpi_parse_lapic_addr_ovr, 0); 905 if (count < 0) { 906 printk(KERN_ERR PREFIX 907 "Error parsing LAPIC address override entry\n"); 908 return count; 909 } 910 911 register_lapic_address(acpi_lapic_addr); 912 913 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC, 914 acpi_parse_sapic, MAX_LOCAL_APIC); 915 916 if (!count) { 917 x2count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC, 918 acpi_parse_x2apic, MAX_LOCAL_APIC); 919 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC, 920 acpi_parse_lapic, MAX_LOCAL_APIC); 921 } 922 if (!count && !x2count) { 923 printk(KERN_ERR PREFIX "No LAPIC entries present\n"); 924 /* TBD: Cleanup to allow fallback to MPS */ 925 return -ENODEV; 926 } else if (count < 0 || x2count < 0) { 927 printk(KERN_ERR PREFIX "Error parsing LAPIC entry\n"); 928 /* TBD: Cleanup to allow fallback to MPS */ 929 return count; 930 } 931 932 x2count = 933 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC_NMI, 934 acpi_parse_x2apic_nmi, 0); 935 count = 936 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI, acpi_parse_lapic_nmi, 0); 937 if (count < 0 || x2count < 0) { 938 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n"); 939 /* TBD: Cleanup to allow fallback to MPS */ 940 return count; 941 } 942 return 0; 943 } 944 #endif /* CONFIG_X86_LOCAL_APIC */ 945 946 #ifdef CONFIG_X86_IO_APIC 947 #define MP_ISA_BUS 0 948 949 #ifdef CONFIG_X86_ES7000 950 extern int es7000_plat; 951 #endif 952 953 void __init mp_override_legacy_irq(u8 bus_irq, u8 polarity, u8 trigger, u32 gsi) 954 { 955 int ioapic; 956 int pin; 957 struct mpc_intsrc mp_irq; 958 959 /* 960 * Convert 'gsi' to 'ioapic.pin'. 961 */ 962 ioapic = mp_find_ioapic(gsi); 963 if (ioapic < 0) 964 return; 965 pin = mp_find_ioapic_pin(ioapic, gsi); 966 967 /* 968 * TBD: This check is for faulty timer entries, where the override 969 * erroneously sets the trigger to level, resulting in a HUGE 970 * increase of timer interrupts! 971 */ 972 if ((bus_irq == 0) && (trigger == 3)) 973 trigger = 1; 974 975 mp_irq.type = MP_INTSRC; 976 mp_irq.irqtype = mp_INT; 977 mp_irq.irqflag = (trigger << 2) | polarity; 978 mp_irq.srcbus = MP_ISA_BUS; 979 mp_irq.srcbusirq = bus_irq; /* IRQ */ 980 mp_irq.dstapic = mpc_ioapic_id(ioapic); /* APIC ID */ 981 mp_irq.dstirq = pin; /* INTIN# */ 982 983 mp_save_irq(&mp_irq); 984 985 isa_irq_to_gsi[bus_irq] = gsi; 986 } 987 988 void __init mp_config_acpi_legacy_irqs(void) 989 { 990 int i; 991 struct mpc_intsrc mp_irq; 992 993 #if defined (CONFIG_MCA) || defined (CONFIG_EISA) 994 /* 995 * Fabricate the legacy ISA bus (bus #31). 996 */ 997 mp_bus_id_to_type[MP_ISA_BUS] = MP_BUS_ISA; 998 #endif 999 set_bit(MP_ISA_BUS, mp_bus_not_pci); 1000 pr_debug("Bus #%d is ISA\n", MP_ISA_BUS); 1001 1002 #ifdef CONFIG_X86_ES7000 1003 /* 1004 * Older generations of ES7000 have no legacy identity mappings 1005 */ 1006 if (es7000_plat == 1) 1007 return; 1008 #endif 1009 1010 /* 1011 * Use the default configuration for the IRQs 0-15. Unless 1012 * overridden by (MADT) interrupt source override entries. 1013 */ 1014 for (i = 0; i < 16; i++) { 1015 int ioapic, pin; 1016 unsigned int dstapic; 1017 int idx; 1018 u32 gsi; 1019 1020 /* Locate the gsi that irq i maps to. */ 1021 if (acpi_isa_irq_to_gsi(i, &gsi)) 1022 continue; 1023 1024 /* 1025 * Locate the IOAPIC that manages the ISA IRQ. 1026 */ 1027 ioapic = mp_find_ioapic(gsi); 1028 if (ioapic < 0) 1029 continue; 1030 pin = mp_find_ioapic_pin(ioapic, gsi); 1031 dstapic = mpc_ioapic_id(ioapic); 1032 1033 for (idx = 0; idx < mp_irq_entries; idx++) { 1034 struct mpc_intsrc *irq = mp_irqs + idx; 1035 1036 /* Do we already have a mapping for this ISA IRQ? */ 1037 if (irq->srcbus == MP_ISA_BUS && irq->srcbusirq == i) 1038 break; 1039 1040 /* Do we already have a mapping for this IOAPIC pin */ 1041 if (irq->dstapic == dstapic && irq->dstirq == pin) 1042 break; 1043 } 1044 1045 if (idx != mp_irq_entries) { 1046 printk(KERN_DEBUG "ACPI: IRQ%d used by override.\n", i); 1047 continue; /* IRQ already used */ 1048 } 1049 1050 mp_irq.type = MP_INTSRC; 1051 mp_irq.irqflag = 0; /* Conforming */ 1052 mp_irq.srcbus = MP_ISA_BUS; 1053 mp_irq.dstapic = dstapic; 1054 mp_irq.irqtype = mp_INT; 1055 mp_irq.srcbusirq = i; /* Identity mapped */ 1056 mp_irq.dstirq = pin; 1057 1058 mp_save_irq(&mp_irq); 1059 } 1060 } 1061 1062 static int mp_config_acpi_gsi(struct device *dev, u32 gsi, int trigger, 1063 int polarity) 1064 { 1065 #ifdef CONFIG_X86_MPPARSE 1066 struct mpc_intsrc mp_irq; 1067 struct pci_dev *pdev; 1068 unsigned char number; 1069 unsigned int devfn; 1070 int ioapic; 1071 u8 pin; 1072 1073 if (!acpi_ioapic) 1074 return 0; 1075 if (!dev) 1076 return 0; 1077 if (dev->bus != &pci_bus_type) 1078 return 0; 1079 1080 pdev = to_pci_dev(dev); 1081 number = pdev->bus->number; 1082 devfn = pdev->devfn; 1083 pin = pdev->pin; 1084 /* print the entry should happen on mptable identically */ 1085 mp_irq.type = MP_INTSRC; 1086 mp_irq.irqtype = mp_INT; 1087 mp_irq.irqflag = (trigger == ACPI_EDGE_SENSITIVE ? 4 : 0x0c) | 1088 (polarity == ACPI_ACTIVE_HIGH ? 1 : 3); 1089 mp_irq.srcbus = number; 1090 mp_irq.srcbusirq = (((devfn >> 3) & 0x1f) << 2) | ((pin - 1) & 3); 1091 ioapic = mp_find_ioapic(gsi); 1092 mp_irq.dstapic = mpc_ioapic_id(ioapic); 1093 mp_irq.dstirq = mp_find_ioapic_pin(ioapic, gsi); 1094 1095 mp_save_irq(&mp_irq); 1096 #endif 1097 return 0; 1098 } 1099 1100 int mp_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity) 1101 { 1102 int ioapic; 1103 int ioapic_pin; 1104 struct io_apic_irq_attr irq_attr; 1105 1106 if (acpi_irq_model != ACPI_IRQ_MODEL_IOAPIC) 1107 return gsi; 1108 1109 /* Don't set up the ACPI SCI because it's already set up */ 1110 if (acpi_gbl_FADT.sci_interrupt == gsi) 1111 return gsi; 1112 1113 ioapic = mp_find_ioapic(gsi); 1114 if (ioapic < 0) { 1115 printk(KERN_WARNING "No IOAPIC for GSI %u\n", gsi); 1116 return gsi; 1117 } 1118 1119 ioapic_pin = mp_find_ioapic_pin(ioapic, gsi); 1120 1121 if (ioapic_pin > MP_MAX_IOAPIC_PIN) { 1122 printk(KERN_ERR "Invalid reference to IOAPIC pin " 1123 "%d-%d\n", mpc_ioapic_id(ioapic), 1124 ioapic_pin); 1125 return gsi; 1126 } 1127 1128 if (enable_update_mptable) 1129 mp_config_acpi_gsi(dev, gsi, trigger, polarity); 1130 1131 set_io_apic_irq_attr(&irq_attr, ioapic, ioapic_pin, 1132 trigger == ACPI_EDGE_SENSITIVE ? 0 : 1, 1133 polarity == ACPI_ACTIVE_HIGH ? 0 : 1); 1134 io_apic_set_pci_routing(dev, gsi_to_irq(gsi), &irq_attr); 1135 1136 return gsi; 1137 } 1138 1139 /* 1140 * Parse IOAPIC related entries in MADT 1141 * returns 0 on success, < 0 on error 1142 */ 1143 static int __init acpi_parse_madt_ioapic_entries(void) 1144 { 1145 int count; 1146 1147 /* 1148 * ACPI interpreter is required to complete interrupt setup, 1149 * so if it is off, don't enumerate the io-apics with ACPI. 1150 * If MPS is present, it will handle them, 1151 * otherwise the system will stay in PIC mode 1152 */ 1153 if (acpi_disabled || acpi_noirq) 1154 return -ENODEV; 1155 1156 if (!cpu_has_apic) 1157 return -ENODEV; 1158 1159 /* 1160 * if "noapic" boot option, don't look for IO-APICs 1161 */ 1162 if (skip_ioapic_setup) { 1163 printk(KERN_INFO PREFIX "Skipping IOAPIC probe " 1164 "due to 'noapic' option.\n"); 1165 return -ENODEV; 1166 } 1167 1168 count = 1169 acpi_table_parse_madt(ACPI_MADT_TYPE_IO_APIC, acpi_parse_ioapic, 1170 MAX_IO_APICS); 1171 if (!count) { 1172 printk(KERN_ERR PREFIX "No IOAPIC entries present\n"); 1173 return -ENODEV; 1174 } else if (count < 0) { 1175 printk(KERN_ERR PREFIX "Error parsing IOAPIC entry\n"); 1176 return count; 1177 } 1178 1179 count = 1180 acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE, acpi_parse_int_src_ovr, 1181 nr_irqs); 1182 if (count < 0) { 1183 printk(KERN_ERR PREFIX 1184 "Error parsing interrupt source overrides entry\n"); 1185 /* TBD: Cleanup to allow fallback to MPS */ 1186 return count; 1187 } 1188 1189 /* 1190 * If BIOS did not supply an INT_SRC_OVR for the SCI 1191 * pretend we got one so we can set the SCI flags. 1192 */ 1193 if (!acpi_sci_override_gsi) 1194 acpi_sci_ioapic_setup(acpi_gbl_FADT.sci_interrupt, 0, 0, 1195 acpi_gbl_FADT.sci_interrupt); 1196 1197 /* Fill in identity legacy mappings where no override */ 1198 mp_config_acpi_legacy_irqs(); 1199 1200 count = 1201 acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE, acpi_parse_nmi_src, 1202 nr_irqs); 1203 if (count < 0) { 1204 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n"); 1205 /* TBD: Cleanup to allow fallback to MPS */ 1206 return count; 1207 } 1208 1209 return 0; 1210 } 1211 #else 1212 static inline int acpi_parse_madt_ioapic_entries(void) 1213 { 1214 return -1; 1215 } 1216 #endif /* !CONFIG_X86_IO_APIC */ 1217 1218 static void __init early_acpi_process_madt(void) 1219 { 1220 #ifdef CONFIG_X86_LOCAL_APIC 1221 int error; 1222 1223 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) { 1224 1225 /* 1226 * Parse MADT LAPIC entries 1227 */ 1228 error = early_acpi_parse_madt_lapic_addr_ovr(); 1229 if (!error) { 1230 acpi_lapic = 1; 1231 smp_found_config = 1; 1232 } 1233 if (error == -EINVAL) { 1234 /* 1235 * Dell Precision Workstation 410, 610 come here. 1236 */ 1237 printk(KERN_ERR PREFIX 1238 "Invalid BIOS MADT, disabling ACPI\n"); 1239 disable_acpi(); 1240 } 1241 } 1242 #endif 1243 } 1244 1245 static void __init acpi_process_madt(void) 1246 { 1247 #ifdef CONFIG_X86_LOCAL_APIC 1248 int error; 1249 1250 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) { 1251 1252 /* 1253 * Parse MADT LAPIC entries 1254 */ 1255 error = acpi_parse_madt_lapic_entries(); 1256 if (!error) { 1257 acpi_lapic = 1; 1258 1259 /* 1260 * Parse MADT IO-APIC entries 1261 */ 1262 error = acpi_parse_madt_ioapic_entries(); 1263 if (!error) { 1264 acpi_set_irq_model_ioapic(); 1265 1266 smp_found_config = 1; 1267 } 1268 } 1269 if (error == -EINVAL) { 1270 /* 1271 * Dell Precision Workstation 410, 610 come here. 1272 */ 1273 printk(KERN_ERR PREFIX 1274 "Invalid BIOS MADT, disabling ACPI\n"); 1275 disable_acpi(); 1276 } 1277 } else { 1278 /* 1279 * ACPI found no MADT, and so ACPI wants UP PIC mode. 1280 * In the event an MPS table was found, forget it. 1281 * Boot with "acpi=off" to use MPS on such a system. 1282 */ 1283 if (smp_found_config) { 1284 printk(KERN_WARNING PREFIX 1285 "No APIC-table, disabling MPS\n"); 1286 smp_found_config = 0; 1287 } 1288 } 1289 1290 /* 1291 * ACPI supports both logical (e.g. Hyper-Threading) and physical 1292 * processors, where MPS only supports physical. 1293 */ 1294 if (acpi_lapic && acpi_ioapic) 1295 printk(KERN_INFO "Using ACPI (MADT) for SMP configuration " 1296 "information\n"); 1297 else if (acpi_lapic) 1298 printk(KERN_INFO "Using ACPI for processor (LAPIC) " 1299 "configuration information\n"); 1300 #endif 1301 return; 1302 } 1303 1304 static int __init disable_acpi_irq(const struct dmi_system_id *d) 1305 { 1306 if (!acpi_force) { 1307 printk(KERN_NOTICE "%s detected: force use of acpi=noirq\n", 1308 d->ident); 1309 acpi_noirq_set(); 1310 } 1311 return 0; 1312 } 1313 1314 static int __init disable_acpi_pci(const struct dmi_system_id *d) 1315 { 1316 if (!acpi_force) { 1317 printk(KERN_NOTICE "%s detected: force use of pci=noacpi\n", 1318 d->ident); 1319 acpi_disable_pci(); 1320 } 1321 return 0; 1322 } 1323 1324 static int __init dmi_disable_acpi(const struct dmi_system_id *d) 1325 { 1326 if (!acpi_force) { 1327 printk(KERN_NOTICE "%s detected: acpi off\n", d->ident); 1328 disable_acpi(); 1329 } else { 1330 printk(KERN_NOTICE 1331 "Warning: DMI blacklist says broken, but acpi forced\n"); 1332 } 1333 return 0; 1334 } 1335 1336 /* 1337 * Force ignoring BIOS IRQ0 pin2 override 1338 */ 1339 static int __init dmi_ignore_irq0_timer_override(const struct dmi_system_id *d) 1340 { 1341 /* 1342 * The ati_ixp4x0_rev() early PCI quirk should have set 1343 * the acpi_skip_timer_override flag already: 1344 */ 1345 if (!acpi_skip_timer_override) { 1346 WARN(1, KERN_ERR "ati_ixp4x0 quirk not complete.\n"); 1347 pr_notice("%s detected: Ignoring BIOS IRQ0 pin2 override\n", 1348 d->ident); 1349 acpi_skip_timer_override = 1; 1350 } 1351 return 0; 1352 } 1353 1354 /* 1355 * If your system is blacklisted here, but you find that acpi=force 1356 * works for you, please contact linux-acpi@vger.kernel.org 1357 */ 1358 static struct dmi_system_id __initdata acpi_dmi_table[] = { 1359 /* 1360 * Boxes that need ACPI disabled 1361 */ 1362 { 1363 .callback = dmi_disable_acpi, 1364 .ident = "IBM Thinkpad", 1365 .matches = { 1366 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), 1367 DMI_MATCH(DMI_BOARD_NAME, "2629H1G"), 1368 }, 1369 }, 1370 1371 /* 1372 * Boxes that need ACPI PCI IRQ routing disabled 1373 */ 1374 { 1375 .callback = disable_acpi_irq, 1376 .ident = "ASUS A7V", 1377 .matches = { 1378 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC"), 1379 DMI_MATCH(DMI_BOARD_NAME, "<A7V>"), 1380 /* newer BIOS, Revision 1011, does work */ 1381 DMI_MATCH(DMI_BIOS_VERSION, 1382 "ASUS A7V ACPI BIOS Revision 1007"), 1383 }, 1384 }, 1385 { 1386 /* 1387 * Latest BIOS for IBM 600E (1.16) has bad pcinum 1388 * for LPC bridge, which is needed for the PCI 1389 * interrupt links to work. DSDT fix is in bug 5966. 1390 * 2645, 2646 model numbers are shared with 600/600E/600X 1391 */ 1392 .callback = disable_acpi_irq, 1393 .ident = "IBM Thinkpad 600 Series 2645", 1394 .matches = { 1395 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), 1396 DMI_MATCH(DMI_BOARD_NAME, "2645"), 1397 }, 1398 }, 1399 { 1400 .callback = disable_acpi_irq, 1401 .ident = "IBM Thinkpad 600 Series 2646", 1402 .matches = { 1403 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), 1404 DMI_MATCH(DMI_BOARD_NAME, "2646"), 1405 }, 1406 }, 1407 /* 1408 * Boxes that need ACPI PCI IRQ routing and PCI scan disabled 1409 */ 1410 { /* _BBN 0 bug */ 1411 .callback = disable_acpi_pci, 1412 .ident = "ASUS PR-DLS", 1413 .matches = { 1414 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."), 1415 DMI_MATCH(DMI_BOARD_NAME, "PR-DLS"), 1416 DMI_MATCH(DMI_BIOS_VERSION, 1417 "ASUS PR-DLS ACPI BIOS Revision 1010"), 1418 DMI_MATCH(DMI_BIOS_DATE, "03/21/2003") 1419 }, 1420 }, 1421 { 1422 .callback = disable_acpi_pci, 1423 .ident = "Acer TravelMate 36x Laptop", 1424 .matches = { 1425 DMI_MATCH(DMI_SYS_VENDOR, "Acer"), 1426 DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"), 1427 }, 1428 }, 1429 {} 1430 }; 1431 1432 /* second table for DMI checks that should run after early-quirks */ 1433 static struct dmi_system_id __initdata acpi_dmi_table_late[] = { 1434 /* 1435 * HP laptops which use a DSDT reporting as HP/SB400/10000, 1436 * which includes some code which overrides all temperature 1437 * trip points to 16C if the INTIN2 input of the I/O APIC 1438 * is enabled. This input is incorrectly designated the 1439 * ISA IRQ 0 via an interrupt source override even though 1440 * it is wired to the output of the master 8259A and INTIN0 1441 * is not connected at all. Force ignoring BIOS IRQ0 pin2 1442 * override in that cases. 1443 */ 1444 { 1445 .callback = dmi_ignore_irq0_timer_override, 1446 .ident = "HP nx6115 laptop", 1447 .matches = { 1448 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 1449 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6115"), 1450 }, 1451 }, 1452 { 1453 .callback = dmi_ignore_irq0_timer_override, 1454 .ident = "HP NX6125 laptop", 1455 .matches = { 1456 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 1457 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6125"), 1458 }, 1459 }, 1460 { 1461 .callback = dmi_ignore_irq0_timer_override, 1462 .ident = "HP NX6325 laptop", 1463 .matches = { 1464 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 1465 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6325"), 1466 }, 1467 }, 1468 { 1469 .callback = dmi_ignore_irq0_timer_override, 1470 .ident = "HP 6715b laptop", 1471 .matches = { 1472 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 1473 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq 6715b"), 1474 }, 1475 }, 1476 {} 1477 }; 1478 1479 /* 1480 * acpi_boot_table_init() and acpi_boot_init() 1481 * called from setup_arch(), always. 1482 * 1. checksums all tables 1483 * 2. enumerates lapics 1484 * 3. enumerates io-apics 1485 * 1486 * acpi_table_init() is separate to allow reading SRAT without 1487 * other side effects. 1488 * 1489 * side effects of acpi_boot_init: 1490 * acpi_lapic = 1 if LAPIC found 1491 * acpi_ioapic = 1 if IOAPIC found 1492 * if (acpi_lapic && acpi_ioapic) smp_found_config = 1; 1493 * if acpi_blacklisted() acpi_disabled = 1; 1494 * acpi_irq_model=... 1495 * ... 1496 */ 1497 1498 void __init acpi_boot_table_init(void) 1499 { 1500 dmi_check_system(acpi_dmi_table); 1501 1502 /* 1503 * If acpi_disabled, bail out 1504 */ 1505 if (acpi_disabled) 1506 return; 1507 1508 /* 1509 * Initialize the ACPI boot-time table parser. 1510 */ 1511 if (acpi_table_init()) { 1512 disable_acpi(); 1513 return; 1514 } 1515 1516 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf); 1517 1518 /* 1519 * blacklist may disable ACPI entirely 1520 */ 1521 if (acpi_blacklisted()) { 1522 if (acpi_force) { 1523 printk(KERN_WARNING PREFIX "acpi=force override\n"); 1524 } else { 1525 printk(KERN_WARNING PREFIX "Disabling ACPI support\n"); 1526 disable_acpi(); 1527 return; 1528 } 1529 } 1530 } 1531 1532 int __init early_acpi_boot_init(void) 1533 { 1534 /* 1535 * If acpi_disabled, bail out 1536 */ 1537 if (acpi_disabled) 1538 return 1; 1539 1540 /* 1541 * Process the Multiple APIC Description Table (MADT), if present 1542 */ 1543 early_acpi_process_madt(); 1544 1545 return 0; 1546 } 1547 1548 int __init acpi_boot_init(void) 1549 { 1550 /* those are executed after early-quirks are executed */ 1551 dmi_check_system(acpi_dmi_table_late); 1552 1553 /* 1554 * If acpi_disabled, bail out 1555 */ 1556 if (acpi_disabled) 1557 return 1; 1558 1559 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf); 1560 1561 /* 1562 * set sci_int and PM timer address 1563 */ 1564 acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt); 1565 1566 /* 1567 * Process the Multiple APIC Description Table (MADT), if present 1568 */ 1569 acpi_process_madt(); 1570 1571 acpi_table_parse(ACPI_SIG_HPET, acpi_parse_hpet); 1572 1573 if (!acpi_noirq) 1574 x86_init.pci.init = pci_acpi_init; 1575 1576 return 0; 1577 } 1578 1579 static int __init parse_acpi(char *arg) 1580 { 1581 if (!arg) 1582 return -EINVAL; 1583 1584 /* "acpi=off" disables both ACPI table parsing and interpreter */ 1585 if (strcmp(arg, "off") == 0) { 1586 disable_acpi(); 1587 } 1588 /* acpi=force to over-ride black-list */ 1589 else if (strcmp(arg, "force") == 0) { 1590 acpi_force = 1; 1591 acpi_disabled = 0; 1592 } 1593 /* acpi=strict disables out-of-spec workarounds */ 1594 else if (strcmp(arg, "strict") == 0) { 1595 acpi_strict = 1; 1596 } 1597 /* acpi=rsdt use RSDT instead of XSDT */ 1598 else if (strcmp(arg, "rsdt") == 0) { 1599 acpi_rsdt_forced = 1; 1600 } 1601 /* "acpi=noirq" disables ACPI interrupt routing */ 1602 else if (strcmp(arg, "noirq") == 0) { 1603 acpi_noirq_set(); 1604 } 1605 /* "acpi=copy_dsdt" copys DSDT */ 1606 else if (strcmp(arg, "copy_dsdt") == 0) { 1607 acpi_gbl_copy_dsdt_locally = 1; 1608 } else { 1609 /* Core will printk when we return error. */ 1610 return -EINVAL; 1611 } 1612 return 0; 1613 } 1614 early_param("acpi", parse_acpi); 1615 1616 /* FIXME: Using pci= for an ACPI parameter is a travesty. */ 1617 static int __init parse_pci(char *arg) 1618 { 1619 if (arg && strcmp(arg, "noacpi") == 0) 1620 acpi_disable_pci(); 1621 return 0; 1622 } 1623 early_param("pci", parse_pci); 1624 1625 int __init acpi_mps_check(void) 1626 { 1627 #if defined(CONFIG_X86_LOCAL_APIC) && !defined(CONFIG_X86_MPPARSE) 1628 /* mptable code is not built-in*/ 1629 if (acpi_disabled || acpi_noirq) { 1630 printk(KERN_WARNING "MPS support code is not built-in.\n" 1631 "Using acpi=off or acpi=noirq or pci=noacpi " 1632 "may have problem\n"); 1633 return 1; 1634 } 1635 #endif 1636 return 0; 1637 } 1638 1639 #ifdef CONFIG_X86_IO_APIC 1640 static int __init parse_acpi_skip_timer_override(char *arg) 1641 { 1642 acpi_skip_timer_override = 1; 1643 return 0; 1644 } 1645 early_param("acpi_skip_timer_override", parse_acpi_skip_timer_override); 1646 1647 static int __init parse_acpi_use_timer_override(char *arg) 1648 { 1649 acpi_use_timer_override = 1; 1650 return 0; 1651 } 1652 early_param("acpi_use_timer_override", parse_acpi_use_timer_override); 1653 #endif /* CONFIG_X86_IO_APIC */ 1654 1655 static int __init setup_acpi_sci(char *s) 1656 { 1657 if (!s) 1658 return -EINVAL; 1659 if (!strcmp(s, "edge")) 1660 acpi_sci_flags = ACPI_MADT_TRIGGER_EDGE | 1661 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK); 1662 else if (!strcmp(s, "level")) 1663 acpi_sci_flags = ACPI_MADT_TRIGGER_LEVEL | 1664 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK); 1665 else if (!strcmp(s, "high")) 1666 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_HIGH | 1667 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK); 1668 else if (!strcmp(s, "low")) 1669 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_LOW | 1670 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK); 1671 else 1672 return -EINVAL; 1673 return 0; 1674 } 1675 early_param("acpi_sci", setup_acpi_sci); 1676 1677 int __acpi_acquire_global_lock(unsigned int *lock) 1678 { 1679 unsigned int old, new, val; 1680 do { 1681 old = *lock; 1682 new = (((old & ~0x3) + 2) + ((old >> 1) & 0x1)); 1683 val = cmpxchg(lock, old, new); 1684 } while (unlikely (val != old)); 1685 return (new < 3) ? -1 : 0; 1686 } 1687 1688 int __acpi_release_global_lock(unsigned int *lock) 1689 { 1690 unsigned int old, new, val; 1691 do { 1692 old = *lock; 1693 new = old & ~0x3; 1694 val = cmpxchg(lock, old, new); 1695 } while (unlikely (val != old)); 1696 return old & 0x1; 1697 } 1698