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 76 #ifdef CONFIG_X86_LOCAL_APIC 77 static u64 acpi_lapic_addr __initdata = APIC_DEFAULT_PHYS_BASE; 78 #endif 79 80 #ifndef __HAVE_ARCH_CMPXCHG 81 #warning ACPI uses CMPXCHG, i486 and later hardware 82 #endif 83 84 /* -------------------------------------------------------------------------- 85 Boot-time Configuration 86 -------------------------------------------------------------------------- */ 87 88 /* 89 * The default interrupt routing model is PIC (8259). This gets 90 * overridden if IOAPICs are enumerated (below). 91 */ 92 enum acpi_irq_model_id acpi_irq_model = ACPI_IRQ_MODEL_PIC; 93 94 95 /* 96 * ISA irqs by default are the first 16 gsis but can be 97 * any gsi as specified by an interrupt source override. 98 */ 99 static u32 isa_irq_to_gsi[NR_IRQS_LEGACY] __read_mostly = { 100 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 101 }; 102 103 static unsigned int gsi_to_irq(unsigned int gsi) 104 { 105 unsigned int irq = gsi + NR_IRQS_LEGACY; 106 unsigned int i; 107 108 for (i = 0; i < NR_IRQS_LEGACY; i++) { 109 if (isa_irq_to_gsi[i] == gsi) { 110 return i; 111 } 112 } 113 114 /* Provide an identity mapping of gsi == irq 115 * except on truly weird platforms that have 116 * non isa irqs in the first 16 gsis. 117 */ 118 if (gsi >= NR_IRQS_LEGACY) 119 irq = gsi; 120 else 121 irq = gsi_top + gsi; 122 123 return irq; 124 } 125 126 static u32 irq_to_gsi(int irq) 127 { 128 unsigned int gsi; 129 130 if (irq < NR_IRQS_LEGACY) 131 gsi = isa_irq_to_gsi[irq]; 132 else if (irq < gsi_top) 133 gsi = irq; 134 else if (irq < (gsi_top + NR_IRQS_LEGACY)) 135 gsi = irq - gsi_top; 136 else 137 gsi = 0xffffffff; 138 139 return gsi; 140 } 141 142 /* 143 * Temporarily use the virtual area starting from FIX_IO_APIC_BASE_END, 144 * to map the target physical address. The problem is that set_fixmap() 145 * provides a single page, and it is possible that the page is not 146 * sufficient. 147 * By using this area, we can map up to MAX_IO_APICS pages temporarily, 148 * i.e. until the next __va_range() call. 149 * 150 * Important Safety Note: The fixed I/O APIC page numbers are *subtracted* 151 * from the fixed base. That's why we start at FIX_IO_APIC_BASE_END and 152 * count idx down while incrementing the phys address. 153 */ 154 char *__init __acpi_map_table(unsigned long phys, unsigned long size) 155 { 156 157 if (!phys || !size) 158 return NULL; 159 160 return early_ioremap(phys, size); 161 } 162 void __init __acpi_unmap_table(char *map, unsigned long size) 163 { 164 if (!map || !size) 165 return; 166 167 early_iounmap(map, size); 168 } 169 170 #ifdef CONFIG_X86_LOCAL_APIC 171 static int __init acpi_parse_madt(struct acpi_table_header *table) 172 { 173 struct acpi_table_madt *madt = NULL; 174 175 if (!cpu_has_apic) 176 return -EINVAL; 177 178 madt = (struct acpi_table_madt *)table; 179 if (!madt) { 180 printk(KERN_WARNING PREFIX "Unable to map MADT\n"); 181 return -ENODEV; 182 } 183 184 if (madt->address) { 185 acpi_lapic_addr = (u64) madt->address; 186 187 printk(KERN_DEBUG PREFIX "Local APIC address 0x%08x\n", 188 madt->address); 189 } 190 191 default_acpi_madt_oem_check(madt->header.oem_id, 192 madt->header.oem_table_id); 193 194 return 0; 195 } 196 197 static void __cpuinit acpi_register_lapic(int id, u8 enabled) 198 { 199 unsigned int ver = 0; 200 201 if (!enabled) { 202 ++disabled_cpus; 203 return; 204 } 205 206 if (boot_cpu_physical_apicid != -1U) 207 ver = apic_version[boot_cpu_physical_apicid]; 208 209 generic_processor_info(id, ver); 210 } 211 212 static int __init 213 acpi_parse_x2apic(struct acpi_subtable_header *header, const unsigned long end) 214 { 215 struct acpi_madt_local_x2apic *processor = NULL; 216 217 processor = (struct acpi_madt_local_x2apic *)header; 218 219 if (BAD_MADT_ENTRY(processor, end)) 220 return -EINVAL; 221 222 acpi_table_print_madt_entry(header); 223 224 #ifdef CONFIG_X86_X2APIC 225 /* 226 * We need to register disabled CPU as well to permit 227 * counting disabled CPUs. This allows us to size 228 * cpus_possible_map more accurately, to permit 229 * to not preallocating memory for all NR_CPUS 230 * when we use CPU hotplug. 231 */ 232 acpi_register_lapic(processor->local_apic_id, /* APIC ID */ 233 processor->lapic_flags & ACPI_MADT_ENABLED); 234 #else 235 printk(KERN_WARNING PREFIX "x2apic entry ignored\n"); 236 #endif 237 238 return 0; 239 } 240 241 static int __init 242 acpi_parse_lapic(struct acpi_subtable_header * header, const unsigned long end) 243 { 244 struct acpi_madt_local_apic *processor = NULL; 245 246 processor = (struct acpi_madt_local_apic *)header; 247 248 if (BAD_MADT_ENTRY(processor, end)) 249 return -EINVAL; 250 251 acpi_table_print_madt_entry(header); 252 253 /* 254 * We need to register disabled CPU as well to permit 255 * counting disabled CPUs. This allows us to size 256 * cpus_possible_map more accurately, to permit 257 * to not preallocating memory for all NR_CPUS 258 * when we use CPU hotplug. 259 */ 260 acpi_register_lapic(processor->id, /* APIC ID */ 261 processor->lapic_flags & ACPI_MADT_ENABLED); 262 263 return 0; 264 } 265 266 static int __init 267 acpi_parse_sapic(struct acpi_subtable_header *header, const unsigned long end) 268 { 269 struct acpi_madt_local_sapic *processor = NULL; 270 271 processor = (struct acpi_madt_local_sapic *)header; 272 273 if (BAD_MADT_ENTRY(processor, end)) 274 return -EINVAL; 275 276 acpi_table_print_madt_entry(header); 277 278 acpi_register_lapic((processor->id << 8) | processor->eid,/* APIC ID */ 279 processor->lapic_flags & ACPI_MADT_ENABLED); 280 281 return 0; 282 } 283 284 static int __init 285 acpi_parse_lapic_addr_ovr(struct acpi_subtable_header * header, 286 const unsigned long end) 287 { 288 struct acpi_madt_local_apic_override *lapic_addr_ovr = NULL; 289 290 lapic_addr_ovr = (struct acpi_madt_local_apic_override *)header; 291 292 if (BAD_MADT_ENTRY(lapic_addr_ovr, end)) 293 return -EINVAL; 294 295 acpi_lapic_addr = lapic_addr_ovr->address; 296 297 return 0; 298 } 299 300 static int __init 301 acpi_parse_x2apic_nmi(struct acpi_subtable_header *header, 302 const unsigned long end) 303 { 304 struct acpi_madt_local_x2apic_nmi *x2apic_nmi = NULL; 305 306 x2apic_nmi = (struct acpi_madt_local_x2apic_nmi *)header; 307 308 if (BAD_MADT_ENTRY(x2apic_nmi, end)) 309 return -EINVAL; 310 311 acpi_table_print_madt_entry(header); 312 313 if (x2apic_nmi->lint != 1) 314 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n"); 315 316 return 0; 317 } 318 319 static int __init 320 acpi_parse_lapic_nmi(struct acpi_subtable_header * header, const unsigned long end) 321 { 322 struct acpi_madt_local_apic_nmi *lapic_nmi = NULL; 323 324 lapic_nmi = (struct acpi_madt_local_apic_nmi *)header; 325 326 if (BAD_MADT_ENTRY(lapic_nmi, end)) 327 return -EINVAL; 328 329 acpi_table_print_madt_entry(header); 330 331 if (lapic_nmi->lint != 1) 332 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n"); 333 334 return 0; 335 } 336 337 #endif /*CONFIG_X86_LOCAL_APIC */ 338 339 #ifdef CONFIG_X86_IO_APIC 340 341 static int __init 342 acpi_parse_ioapic(struct acpi_subtable_header * header, const unsigned long end) 343 { 344 struct acpi_madt_io_apic *ioapic = NULL; 345 346 ioapic = (struct acpi_madt_io_apic *)header; 347 348 if (BAD_MADT_ENTRY(ioapic, end)) 349 return -EINVAL; 350 351 acpi_table_print_madt_entry(header); 352 353 mp_register_ioapic(ioapic->id, 354 ioapic->address, ioapic->global_irq_base); 355 356 return 0; 357 } 358 359 /* 360 * Parse Interrupt Source Override for the ACPI SCI 361 */ 362 static void __init acpi_sci_ioapic_setup(u8 bus_irq, u16 polarity, u16 trigger, u32 gsi) 363 { 364 if (trigger == 0) /* compatible SCI trigger is level */ 365 trigger = 3; 366 367 if (polarity == 0) /* compatible SCI polarity is low */ 368 polarity = 3; 369 370 /* Command-line over-ride via acpi_sci= */ 371 if (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) 372 trigger = (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2; 373 374 if (acpi_sci_flags & ACPI_MADT_POLARITY_MASK) 375 polarity = acpi_sci_flags & ACPI_MADT_POLARITY_MASK; 376 377 /* 378 * mp_config_acpi_legacy_irqs() already setup IRQs < 16 379 * If GSI is < 16, this will update its flags, 380 * else it will create a new mp_irqs[] entry. 381 */ 382 mp_override_legacy_irq(bus_irq, polarity, trigger, gsi); 383 384 /* 385 * stash over-ride to indicate we've been here 386 * and for later update of acpi_gbl_FADT 387 */ 388 acpi_sci_override_gsi = gsi; 389 return; 390 } 391 392 static int __init 393 acpi_parse_int_src_ovr(struct acpi_subtable_header * header, 394 const unsigned long end) 395 { 396 struct acpi_madt_interrupt_override *intsrc = NULL; 397 398 intsrc = (struct acpi_madt_interrupt_override *)header; 399 400 if (BAD_MADT_ENTRY(intsrc, end)) 401 return -EINVAL; 402 403 acpi_table_print_madt_entry(header); 404 405 if (intsrc->source_irq == acpi_gbl_FADT.sci_interrupt) { 406 acpi_sci_ioapic_setup(intsrc->source_irq, 407 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK, 408 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2, 409 intsrc->global_irq); 410 return 0; 411 } 412 413 if (acpi_skip_timer_override && 414 intsrc->source_irq == 0 && intsrc->global_irq == 2) { 415 printk(PREFIX "BIOS IRQ0 pin2 override ignored.\n"); 416 return 0; 417 } 418 419 mp_override_legacy_irq(intsrc->source_irq, 420 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK, 421 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2, 422 intsrc->global_irq); 423 424 return 0; 425 } 426 427 static int __init 428 acpi_parse_nmi_src(struct acpi_subtable_header * header, const unsigned long end) 429 { 430 struct acpi_madt_nmi_source *nmi_src = NULL; 431 432 nmi_src = (struct acpi_madt_nmi_source *)header; 433 434 if (BAD_MADT_ENTRY(nmi_src, end)) 435 return -EINVAL; 436 437 acpi_table_print_madt_entry(header); 438 439 /* TBD: Support nimsrc entries? */ 440 441 return 0; 442 } 443 444 #endif /* CONFIG_X86_IO_APIC */ 445 446 /* 447 * acpi_pic_sci_set_trigger() 448 * 449 * use ELCR to set PIC-mode trigger type for SCI 450 * 451 * If a PIC-mode SCI is not recognized or gives spurious IRQ7's 452 * it may require Edge Trigger -- use "acpi_sci=edge" 453 * 454 * Port 0x4d0-4d1 are ECLR1 and ECLR2, the Edge/Level Control Registers 455 * for the 8259 PIC. bit[n] = 1 means irq[n] is Level, otherwise Edge. 456 * ECLR1 is IRQs 0-7 (IRQ 0, 1, 2 must be 0) 457 * ECLR2 is IRQs 8-15 (IRQ 8, 13 must be 0) 458 */ 459 460 void __init acpi_pic_sci_set_trigger(unsigned int irq, u16 trigger) 461 { 462 unsigned int mask = 1 << irq; 463 unsigned int old, new; 464 465 /* Real old ELCR mask */ 466 old = inb(0x4d0) | (inb(0x4d1) << 8); 467 468 /* 469 * If we use ACPI to set PCI IRQs, then we should clear ELCR 470 * since we will set it correctly as we enable the PCI irq 471 * routing. 472 */ 473 new = acpi_noirq ? old : 0; 474 475 /* 476 * Update SCI information in the ELCR, it isn't in the PCI 477 * routing tables.. 478 */ 479 switch (trigger) { 480 case 1: /* Edge - clear */ 481 new &= ~mask; 482 break; 483 case 3: /* Level - set */ 484 new |= mask; 485 break; 486 } 487 488 if (old == new) 489 return; 490 491 printk(PREFIX "setting ELCR to %04x (from %04x)\n", new, old); 492 outb(new, 0x4d0); 493 outb(new >> 8, 0x4d1); 494 } 495 496 int acpi_gsi_to_irq(u32 gsi, unsigned int *irq) 497 { 498 *irq = gsi_to_irq(gsi); 499 500 #ifdef CONFIG_X86_IO_APIC 501 if (acpi_irq_model == ACPI_IRQ_MODEL_IOAPIC) 502 setup_IO_APIC_irq_extra(gsi); 503 #endif 504 505 return 0; 506 } 507 508 int acpi_isa_irq_to_gsi(unsigned isa_irq, u32 *gsi) 509 { 510 if (isa_irq >= 16) 511 return -1; 512 *gsi = irq_to_gsi(isa_irq); 513 return 0; 514 } 515 516 /* 517 * success: return IRQ number (>=0) 518 * failure: return < 0 519 */ 520 int acpi_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity) 521 { 522 unsigned int irq; 523 unsigned int plat_gsi = gsi; 524 525 #ifdef CONFIG_PCI 526 /* 527 * Make sure all (legacy) PCI IRQs are set as level-triggered. 528 */ 529 if (acpi_irq_model == ACPI_IRQ_MODEL_PIC) { 530 if (trigger == ACPI_LEVEL_SENSITIVE) 531 eisa_set_level_irq(gsi); 532 } 533 #endif 534 535 #ifdef CONFIG_X86_IO_APIC 536 if (acpi_irq_model == ACPI_IRQ_MODEL_IOAPIC) { 537 plat_gsi = mp_register_gsi(dev, gsi, trigger, polarity); 538 } 539 #endif 540 irq = gsi_to_irq(plat_gsi); 541 542 return irq; 543 } 544 545 /* 546 * ACPI based hotplug support for CPU 547 */ 548 #ifdef CONFIG_ACPI_HOTPLUG_CPU 549 #include <acpi/processor.h> 550 551 static void acpi_map_cpu2node(acpi_handle handle, int cpu, int physid) 552 { 553 #ifdef CONFIG_ACPI_NUMA 554 int nid; 555 556 nid = acpi_get_node(handle); 557 if (nid == -1 || !node_online(nid)) 558 return; 559 #ifdef CONFIG_X86_64 560 apicid_to_node[physid] = nid; 561 numa_set_node(cpu, nid); 562 #else /* CONFIG_X86_32 */ 563 apicid_2_node[physid] = nid; 564 cpu_to_node_map[cpu] = nid; 565 #endif 566 567 #endif 568 } 569 570 static int __cpuinit _acpi_map_lsapic(acpi_handle handle, int *pcpu) 571 { 572 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; 573 union acpi_object *obj; 574 struct acpi_madt_local_apic *lapic; 575 cpumask_var_t tmp_map, new_map; 576 u8 physid; 577 int cpu; 578 int retval = -ENOMEM; 579 580 if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer))) 581 return -EINVAL; 582 583 if (!buffer.length || !buffer.pointer) 584 return -EINVAL; 585 586 obj = buffer.pointer; 587 if (obj->type != ACPI_TYPE_BUFFER || 588 obj->buffer.length < sizeof(*lapic)) { 589 kfree(buffer.pointer); 590 return -EINVAL; 591 } 592 593 lapic = (struct acpi_madt_local_apic *)obj->buffer.pointer; 594 595 if (lapic->header.type != ACPI_MADT_TYPE_LOCAL_APIC || 596 !(lapic->lapic_flags & ACPI_MADT_ENABLED)) { 597 kfree(buffer.pointer); 598 return -EINVAL; 599 } 600 601 physid = lapic->id; 602 603 kfree(buffer.pointer); 604 buffer.length = ACPI_ALLOCATE_BUFFER; 605 buffer.pointer = NULL; 606 607 if (!alloc_cpumask_var(&tmp_map, GFP_KERNEL)) 608 goto out; 609 610 if (!alloc_cpumask_var(&new_map, GFP_KERNEL)) 611 goto free_tmp_map; 612 613 cpumask_copy(tmp_map, cpu_present_mask); 614 acpi_register_lapic(physid, lapic->lapic_flags & ACPI_MADT_ENABLED); 615 616 /* 617 * If mp_register_lapic successfully generates a new logical cpu 618 * number, then the following will get us exactly what was mapped 619 */ 620 cpumask_andnot(new_map, cpu_present_mask, tmp_map); 621 if (cpumask_empty(new_map)) { 622 printk ("Unable to map lapic to logical cpu number\n"); 623 retval = -EINVAL; 624 goto free_new_map; 625 } 626 627 acpi_processor_set_pdc(handle); 628 629 cpu = cpumask_first(new_map); 630 acpi_map_cpu2node(handle, cpu, physid); 631 632 *pcpu = cpu; 633 retval = 0; 634 635 free_new_map: 636 free_cpumask_var(new_map); 637 free_tmp_map: 638 free_cpumask_var(tmp_map); 639 out: 640 return retval; 641 } 642 643 /* wrapper to silence section mismatch warning */ 644 int __ref acpi_map_lsapic(acpi_handle handle, int *pcpu) 645 { 646 return _acpi_map_lsapic(handle, pcpu); 647 } 648 EXPORT_SYMBOL(acpi_map_lsapic); 649 650 int acpi_unmap_lsapic(int cpu) 651 { 652 per_cpu(x86_cpu_to_apicid, cpu) = -1; 653 set_cpu_present(cpu, false); 654 num_processors--; 655 656 return (0); 657 } 658 659 EXPORT_SYMBOL(acpi_unmap_lsapic); 660 #endif /* CONFIG_ACPI_HOTPLUG_CPU */ 661 662 int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base) 663 { 664 /* TBD */ 665 return -EINVAL; 666 } 667 668 EXPORT_SYMBOL(acpi_register_ioapic); 669 670 int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base) 671 { 672 /* TBD */ 673 return -EINVAL; 674 } 675 676 EXPORT_SYMBOL(acpi_unregister_ioapic); 677 678 static int __init acpi_parse_sbf(struct acpi_table_header *table) 679 { 680 struct acpi_table_boot *sb; 681 682 sb = (struct acpi_table_boot *)table; 683 if (!sb) { 684 printk(KERN_WARNING PREFIX "Unable to map SBF\n"); 685 return -ENODEV; 686 } 687 688 sbf_port = sb->cmos_index; /* Save CMOS port */ 689 690 return 0; 691 } 692 693 #ifdef CONFIG_HPET_TIMER 694 #include <asm/hpet.h> 695 696 static struct __initdata resource *hpet_res; 697 698 static int __init acpi_parse_hpet(struct acpi_table_header *table) 699 { 700 struct acpi_table_hpet *hpet_tbl; 701 702 hpet_tbl = (struct acpi_table_hpet *)table; 703 if (!hpet_tbl) { 704 printk(KERN_WARNING PREFIX "Unable to map HPET\n"); 705 return -ENODEV; 706 } 707 708 if (hpet_tbl->address.space_id != ACPI_SPACE_MEM) { 709 printk(KERN_WARNING PREFIX "HPET timers must be located in " 710 "memory.\n"); 711 return -1; 712 } 713 714 hpet_address = hpet_tbl->address.address; 715 hpet_blockid = hpet_tbl->sequence; 716 717 /* 718 * Some broken BIOSes advertise HPET at 0x0. We really do not 719 * want to allocate a resource there. 720 */ 721 if (!hpet_address) { 722 printk(KERN_WARNING PREFIX 723 "HPET id: %#x base: %#lx is invalid\n", 724 hpet_tbl->id, hpet_address); 725 return 0; 726 } 727 #ifdef CONFIG_X86_64 728 /* 729 * Some even more broken BIOSes advertise HPET at 730 * 0xfed0000000000000 instead of 0xfed00000. Fix it up and add 731 * some noise: 732 */ 733 if (hpet_address == 0xfed0000000000000UL) { 734 if (!hpet_force_user) { 735 printk(KERN_WARNING PREFIX "HPET id: %#x " 736 "base: 0xfed0000000000000 is bogus\n " 737 "try hpet=force on the kernel command line to " 738 "fix it up to 0xfed00000.\n", hpet_tbl->id); 739 hpet_address = 0; 740 return 0; 741 } 742 printk(KERN_WARNING PREFIX 743 "HPET id: %#x base: 0xfed0000000000000 fixed up " 744 "to 0xfed00000.\n", hpet_tbl->id); 745 hpet_address >>= 32; 746 } 747 #endif 748 printk(KERN_INFO PREFIX "HPET id: %#x base: %#lx\n", 749 hpet_tbl->id, hpet_address); 750 751 /* 752 * Allocate and initialize the HPET firmware resource for adding into 753 * the resource tree during the lateinit timeframe. 754 */ 755 #define HPET_RESOURCE_NAME_SIZE 9 756 hpet_res = alloc_bootmem(sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE); 757 758 hpet_res->name = (void *)&hpet_res[1]; 759 hpet_res->flags = IORESOURCE_MEM; 760 snprintf((char *)hpet_res->name, HPET_RESOURCE_NAME_SIZE, "HPET %u", 761 hpet_tbl->sequence); 762 763 hpet_res->start = hpet_address; 764 hpet_res->end = hpet_address + (1 * 1024) - 1; 765 766 return 0; 767 } 768 769 /* 770 * hpet_insert_resource inserts the HPET resources used into the resource 771 * tree. 772 */ 773 static __init int hpet_insert_resource(void) 774 { 775 if (!hpet_res) 776 return 1; 777 778 return insert_resource(&iomem_resource, hpet_res); 779 } 780 781 late_initcall(hpet_insert_resource); 782 783 #else 784 #define acpi_parse_hpet NULL 785 #endif 786 787 static int __init acpi_parse_fadt(struct acpi_table_header *table) 788 { 789 790 #ifdef CONFIG_X86_PM_TIMER 791 /* detect the location of the ACPI PM Timer */ 792 if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID) { 793 /* FADT rev. 2 */ 794 if (acpi_gbl_FADT.xpm_timer_block.space_id != 795 ACPI_ADR_SPACE_SYSTEM_IO) 796 return 0; 797 798 pmtmr_ioport = acpi_gbl_FADT.xpm_timer_block.address; 799 /* 800 * "X" fields are optional extensions to the original V1.0 801 * fields, so we must selectively expand V1.0 fields if the 802 * corresponding X field is zero. 803 */ 804 if (!pmtmr_ioport) 805 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block; 806 } else { 807 /* FADT rev. 1 */ 808 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block; 809 } 810 if (pmtmr_ioport) 811 printk(KERN_INFO PREFIX "PM-Timer IO Port: %#x\n", 812 pmtmr_ioport); 813 #endif 814 return 0; 815 } 816 817 #ifdef CONFIG_X86_LOCAL_APIC 818 /* 819 * Parse LAPIC entries in MADT 820 * returns 0 on success, < 0 on error 821 */ 822 823 static void __init acpi_register_lapic_address(unsigned long address) 824 { 825 mp_lapic_addr = address; 826 827 set_fixmap_nocache(FIX_APIC_BASE, address); 828 if (boot_cpu_physical_apicid == -1U) { 829 boot_cpu_physical_apicid = read_apic_id(); 830 apic_version[boot_cpu_physical_apicid] = 831 GET_APIC_VERSION(apic_read(APIC_LVR)); 832 } 833 } 834 835 static int __init early_acpi_parse_madt_lapic_addr_ovr(void) 836 { 837 int count; 838 839 if (!cpu_has_apic) 840 return -ENODEV; 841 842 /* 843 * Note that the LAPIC address is obtained from the MADT (32-bit value) 844 * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value). 845 */ 846 847 count = 848 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE, 849 acpi_parse_lapic_addr_ovr, 0); 850 if (count < 0) { 851 printk(KERN_ERR PREFIX 852 "Error parsing LAPIC address override entry\n"); 853 return count; 854 } 855 856 acpi_register_lapic_address(acpi_lapic_addr); 857 858 return count; 859 } 860 861 static int __init acpi_parse_madt_lapic_entries(void) 862 { 863 int count; 864 int x2count = 0; 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 acpi_register_lapic_address(acpi_lapic_addr); 884 885 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC, 886 acpi_parse_sapic, MAX_APICS); 887 888 if (!count) { 889 x2count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC, 890 acpi_parse_x2apic, MAX_APICS); 891 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC, 892 acpi_parse_lapic, MAX_APICS); 893 } 894 if (!count && !x2count) { 895 printk(KERN_ERR PREFIX "No LAPIC entries present\n"); 896 /* TBD: Cleanup to allow fallback to MPS */ 897 return -ENODEV; 898 } else if (count < 0 || x2count < 0) { 899 printk(KERN_ERR PREFIX "Error parsing LAPIC entry\n"); 900 /* TBD: Cleanup to allow fallback to MPS */ 901 return count; 902 } 903 904 x2count = 905 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC_NMI, 906 acpi_parse_x2apic_nmi, 0); 907 count = 908 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI, acpi_parse_lapic_nmi, 0); 909 if (count < 0 || x2count < 0) { 910 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n"); 911 /* TBD: Cleanup to allow fallback to MPS */ 912 return count; 913 } 914 return 0; 915 } 916 #endif /* CONFIG_X86_LOCAL_APIC */ 917 918 #ifdef CONFIG_X86_IO_APIC 919 #define MP_ISA_BUS 0 920 921 #ifdef CONFIG_X86_ES7000 922 extern int es7000_plat; 923 #endif 924 925 static void assign_to_mp_irq(struct mpc_intsrc *m, 926 struct mpc_intsrc *mp_irq) 927 { 928 memcpy(mp_irq, m, sizeof(struct mpc_intsrc)); 929 } 930 931 static int mp_irq_cmp(struct mpc_intsrc *mp_irq, 932 struct mpc_intsrc *m) 933 { 934 return memcmp(mp_irq, m, sizeof(struct mpc_intsrc)); 935 } 936 937 static void save_mp_irq(struct mpc_intsrc *m) 938 { 939 int i; 940 941 for (i = 0; i < mp_irq_entries; i++) { 942 if (!mp_irq_cmp(&mp_irqs[i], m)) 943 return; 944 } 945 946 assign_to_mp_irq(m, &mp_irqs[mp_irq_entries]); 947 if (++mp_irq_entries == MAX_IRQ_SOURCES) 948 panic("Max # of irq sources exceeded!!\n"); 949 } 950 951 void __init mp_override_legacy_irq(u8 bus_irq, u8 polarity, u8 trigger, u32 gsi) 952 { 953 int ioapic; 954 int pin; 955 struct mpc_intsrc mp_irq; 956 957 /* 958 * Convert 'gsi' to 'ioapic.pin'. 959 */ 960 ioapic = mp_find_ioapic(gsi); 961 if (ioapic < 0) 962 return; 963 pin = mp_find_ioapic_pin(ioapic, gsi); 964 965 /* 966 * TBD: This check is for faulty timer entries, where the override 967 * erroneously sets the trigger to level, resulting in a HUGE 968 * increase of timer interrupts! 969 */ 970 if ((bus_irq == 0) && (trigger == 3)) 971 trigger = 1; 972 973 mp_irq.type = MP_INTSRC; 974 mp_irq.irqtype = mp_INT; 975 mp_irq.irqflag = (trigger << 2) | polarity; 976 mp_irq.srcbus = MP_ISA_BUS; 977 mp_irq.srcbusirq = bus_irq; /* IRQ */ 978 mp_irq.dstapic = mp_ioapics[ioapic].apicid; /* APIC ID */ 979 mp_irq.dstirq = pin; /* INTIN# */ 980 981 save_mp_irq(&mp_irq); 982 983 isa_irq_to_gsi[bus_irq] = gsi; 984 } 985 986 void __init mp_config_acpi_legacy_irqs(void) 987 { 988 int i; 989 struct mpc_intsrc mp_irq; 990 991 #if defined (CONFIG_MCA) || defined (CONFIG_EISA) 992 /* 993 * Fabricate the legacy ISA bus (bus #31). 994 */ 995 mp_bus_id_to_type[MP_ISA_BUS] = MP_BUS_ISA; 996 #endif 997 set_bit(MP_ISA_BUS, mp_bus_not_pci); 998 pr_debug("Bus #%d is ISA\n", MP_ISA_BUS); 999 1000 #ifdef CONFIG_X86_ES7000 1001 /* 1002 * Older generations of ES7000 have no legacy identity mappings 1003 */ 1004 if (es7000_plat == 1) 1005 return; 1006 #endif 1007 1008 /* 1009 * Use the default configuration for the IRQs 0-15. Unless 1010 * overridden by (MADT) interrupt source override entries. 1011 */ 1012 for (i = 0; i < 16; i++) { 1013 int ioapic, pin; 1014 unsigned int dstapic; 1015 int idx; 1016 u32 gsi; 1017 1018 /* Locate the gsi that irq i maps to. */ 1019 if (acpi_isa_irq_to_gsi(i, &gsi)) 1020 continue; 1021 1022 /* 1023 * Locate the IOAPIC that manages the ISA IRQ. 1024 */ 1025 ioapic = mp_find_ioapic(gsi); 1026 if (ioapic < 0) 1027 continue; 1028 pin = mp_find_ioapic_pin(ioapic, gsi); 1029 dstapic = mp_ioapics[ioapic].apicid; 1030 1031 for (idx = 0; idx < mp_irq_entries; idx++) { 1032 struct mpc_intsrc *irq = mp_irqs + idx; 1033 1034 /* Do we already have a mapping for this ISA IRQ? */ 1035 if (irq->srcbus == MP_ISA_BUS && irq->srcbusirq == i) 1036 break; 1037 1038 /* Do we already have a mapping for this IOAPIC pin */ 1039 if (irq->dstapic == dstapic && irq->dstirq == pin) 1040 break; 1041 } 1042 1043 if (idx != mp_irq_entries) { 1044 printk(KERN_DEBUG "ACPI: IRQ%d used by override.\n", i); 1045 continue; /* IRQ already used */ 1046 } 1047 1048 mp_irq.type = MP_INTSRC; 1049 mp_irq.irqflag = 0; /* Conforming */ 1050 mp_irq.srcbus = MP_ISA_BUS; 1051 mp_irq.dstapic = dstapic; 1052 mp_irq.irqtype = mp_INT; 1053 mp_irq.srcbusirq = i; /* Identity mapped */ 1054 mp_irq.dstirq = pin; 1055 1056 save_mp_irq(&mp_irq); 1057 } 1058 } 1059 1060 static int mp_config_acpi_gsi(struct device *dev, u32 gsi, int trigger, 1061 int polarity) 1062 { 1063 #ifdef CONFIG_X86_MPPARSE 1064 struct mpc_intsrc mp_irq; 1065 struct pci_dev *pdev; 1066 unsigned char number; 1067 unsigned int devfn; 1068 int ioapic; 1069 u8 pin; 1070 1071 if (!acpi_ioapic) 1072 return 0; 1073 if (!dev) 1074 return 0; 1075 if (dev->bus != &pci_bus_type) 1076 return 0; 1077 1078 pdev = to_pci_dev(dev); 1079 number = pdev->bus->number; 1080 devfn = pdev->devfn; 1081 pin = pdev->pin; 1082 /* print the entry should happen on mptable identically */ 1083 mp_irq.type = MP_INTSRC; 1084 mp_irq.irqtype = mp_INT; 1085 mp_irq.irqflag = (trigger == ACPI_EDGE_SENSITIVE ? 4 : 0x0c) | 1086 (polarity == ACPI_ACTIVE_HIGH ? 1 : 3); 1087 mp_irq.srcbus = number; 1088 mp_irq.srcbusirq = (((devfn >> 3) & 0x1f) << 2) | ((pin - 1) & 3); 1089 ioapic = mp_find_ioapic(gsi); 1090 mp_irq.dstapic = mp_ioapics[ioapic].apicid; 1091 mp_irq.dstirq = mp_find_ioapic_pin(ioapic, gsi); 1092 1093 save_mp_irq(&mp_irq); 1094 #endif 1095 return 0; 1096 } 1097 1098 int mp_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity) 1099 { 1100 int ioapic; 1101 int ioapic_pin; 1102 struct io_apic_irq_attr irq_attr; 1103 1104 if (acpi_irq_model != ACPI_IRQ_MODEL_IOAPIC) 1105 return gsi; 1106 1107 /* Don't set up the ACPI SCI because it's already set up */ 1108 if (acpi_gbl_FADT.sci_interrupt == gsi) 1109 return gsi; 1110 1111 ioapic = mp_find_ioapic(gsi); 1112 if (ioapic < 0) { 1113 printk(KERN_WARNING "No IOAPIC for GSI %u\n", gsi); 1114 return gsi; 1115 } 1116 1117 ioapic_pin = mp_find_ioapic_pin(ioapic, gsi); 1118 1119 if (ioapic_pin > MP_MAX_IOAPIC_PIN) { 1120 printk(KERN_ERR "Invalid reference to IOAPIC pin " 1121 "%d-%d\n", mp_ioapics[ioapic].apicid, 1122 ioapic_pin); 1123 return gsi; 1124 } 1125 1126 if (enable_update_mptable) 1127 mp_config_acpi_gsi(dev, gsi, trigger, polarity); 1128 1129 set_io_apic_irq_attr(&irq_attr, ioapic, ioapic_pin, 1130 trigger == ACPI_EDGE_SENSITIVE ? 0 : 1, 1131 polarity == ACPI_ACTIVE_HIGH ? 0 : 1); 1132 io_apic_set_pci_routing(dev, gsi_to_irq(gsi), &irq_attr); 1133 1134 return gsi; 1135 } 1136 1137 /* 1138 * Parse IOAPIC related entries in MADT 1139 * returns 0 on success, < 0 on error 1140 */ 1141 static int __init acpi_parse_madt_ioapic_entries(void) 1142 { 1143 int count; 1144 1145 /* 1146 * ACPI interpreter is required to complete interrupt setup, 1147 * so if it is off, don't enumerate the io-apics with ACPI. 1148 * If MPS is present, it will handle them, 1149 * otherwise the system will stay in PIC mode 1150 */ 1151 if (acpi_disabled || acpi_noirq) 1152 return -ENODEV; 1153 1154 if (!cpu_has_apic) 1155 return -ENODEV; 1156 1157 /* 1158 * if "noapic" boot option, don't look for IO-APICs 1159 */ 1160 if (skip_ioapic_setup) { 1161 printk(KERN_INFO PREFIX "Skipping IOAPIC probe " 1162 "due to 'noapic' option.\n"); 1163 return -ENODEV; 1164 } 1165 1166 count = 1167 acpi_table_parse_madt(ACPI_MADT_TYPE_IO_APIC, acpi_parse_ioapic, 1168 MAX_IO_APICS); 1169 if (!count) { 1170 printk(KERN_ERR PREFIX "No IOAPIC entries present\n"); 1171 return -ENODEV; 1172 } else if (count < 0) { 1173 printk(KERN_ERR PREFIX "Error parsing IOAPIC entry\n"); 1174 return count; 1175 } 1176 1177 count = 1178 acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE, acpi_parse_int_src_ovr, 1179 nr_irqs); 1180 if (count < 0) { 1181 printk(KERN_ERR PREFIX 1182 "Error parsing interrupt source overrides entry\n"); 1183 /* TBD: Cleanup to allow fallback to MPS */ 1184 return count; 1185 } 1186 1187 /* 1188 * If BIOS did not supply an INT_SRC_OVR for the SCI 1189 * pretend we got one so we can set the SCI flags. 1190 */ 1191 if (!acpi_sci_override_gsi) 1192 acpi_sci_ioapic_setup(acpi_gbl_FADT.sci_interrupt, 0, 0, 1193 acpi_gbl_FADT.sci_interrupt); 1194 1195 /* Fill in identity legacy mappings where no override */ 1196 mp_config_acpi_legacy_irqs(); 1197 1198 count = 1199 acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE, acpi_parse_nmi_src, 1200 nr_irqs); 1201 if (count < 0) { 1202 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n"); 1203 /* TBD: Cleanup to allow fallback to MPS */ 1204 return count; 1205 } 1206 1207 return 0; 1208 } 1209 #else 1210 static inline int acpi_parse_madt_ioapic_entries(void) 1211 { 1212 return -1; 1213 } 1214 #endif /* !CONFIG_X86_IO_APIC */ 1215 1216 static void __init early_acpi_process_madt(void) 1217 { 1218 #ifdef CONFIG_X86_LOCAL_APIC 1219 int error; 1220 1221 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) { 1222 1223 /* 1224 * Parse MADT LAPIC entries 1225 */ 1226 error = early_acpi_parse_madt_lapic_addr_ovr(); 1227 if (!error) { 1228 acpi_lapic = 1; 1229 smp_found_config = 1; 1230 } 1231 if (error == -EINVAL) { 1232 /* 1233 * Dell Precision Workstation 410, 610 come here. 1234 */ 1235 printk(KERN_ERR PREFIX 1236 "Invalid BIOS MADT, disabling ACPI\n"); 1237 disable_acpi(); 1238 } 1239 } 1240 #endif 1241 } 1242 1243 static void __init acpi_process_madt(void) 1244 { 1245 #ifdef CONFIG_X86_LOCAL_APIC 1246 int error; 1247 1248 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) { 1249 1250 /* 1251 * Parse MADT LAPIC entries 1252 */ 1253 error = acpi_parse_madt_lapic_entries(); 1254 if (!error) { 1255 acpi_lapic = 1; 1256 1257 /* 1258 * Parse MADT IO-APIC entries 1259 */ 1260 error = acpi_parse_madt_ioapic_entries(); 1261 if (!error) { 1262 acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC; 1263 acpi_ioapic = 1; 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