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 (id >= (MAX_LOCAL_APIC-1)) { 202 printk(KERN_INFO PREFIX "skipped apicid that is too big\n"); 203 return; 204 } 205 206 if (!enabled) { 207 ++disabled_cpus; 208 return; 209 } 210 211 if (boot_cpu_physical_apicid != -1U) 212 ver = apic_version[boot_cpu_physical_apicid]; 213 214 generic_processor_info(id, ver); 215 } 216 217 static int __init 218 acpi_parse_x2apic(struct acpi_subtable_header *header, const unsigned long end) 219 { 220 struct acpi_madt_local_x2apic *processor = NULL; 221 222 processor = (struct acpi_madt_local_x2apic *)header; 223 224 if (BAD_MADT_ENTRY(processor, end)) 225 return -EINVAL; 226 227 acpi_table_print_madt_entry(header); 228 229 #ifdef CONFIG_X86_X2APIC 230 /* 231 * We need to register disabled CPU as well to permit 232 * counting disabled CPUs. This allows us to size 233 * cpus_possible_map more accurately, to permit 234 * to not preallocating memory for all NR_CPUS 235 * when we use CPU hotplug. 236 */ 237 acpi_register_lapic(processor->local_apic_id, /* APIC ID */ 238 processor->lapic_flags & ACPI_MADT_ENABLED); 239 #else 240 printk(KERN_WARNING PREFIX "x2apic entry ignored\n"); 241 #endif 242 243 return 0; 244 } 245 246 static int __init 247 acpi_parse_lapic(struct acpi_subtable_header * header, const unsigned long end) 248 { 249 struct acpi_madt_local_apic *processor = NULL; 250 251 processor = (struct acpi_madt_local_apic *)header; 252 253 if (BAD_MADT_ENTRY(processor, end)) 254 return -EINVAL; 255 256 acpi_table_print_madt_entry(header); 257 258 /* 259 * We need to register disabled CPU as well to permit 260 * counting disabled CPUs. This allows us to size 261 * cpus_possible_map more accurately, to permit 262 * to not preallocating memory for all NR_CPUS 263 * when we use CPU hotplug. 264 */ 265 acpi_register_lapic(processor->id, /* APIC ID */ 266 processor->lapic_flags & ACPI_MADT_ENABLED); 267 268 return 0; 269 } 270 271 static int __init 272 acpi_parse_sapic(struct acpi_subtable_header *header, const unsigned long end) 273 { 274 struct acpi_madt_local_sapic *processor = NULL; 275 276 processor = (struct acpi_madt_local_sapic *)header; 277 278 if (BAD_MADT_ENTRY(processor, end)) 279 return -EINVAL; 280 281 acpi_table_print_madt_entry(header); 282 283 acpi_register_lapic((processor->id << 8) | processor->eid,/* APIC ID */ 284 processor->lapic_flags & ACPI_MADT_ENABLED); 285 286 return 0; 287 } 288 289 static int __init 290 acpi_parse_lapic_addr_ovr(struct acpi_subtable_header * header, 291 const unsigned long end) 292 { 293 struct acpi_madt_local_apic_override *lapic_addr_ovr = NULL; 294 295 lapic_addr_ovr = (struct acpi_madt_local_apic_override *)header; 296 297 if (BAD_MADT_ENTRY(lapic_addr_ovr, end)) 298 return -EINVAL; 299 300 acpi_lapic_addr = lapic_addr_ovr->address; 301 302 return 0; 303 } 304 305 static int __init 306 acpi_parse_x2apic_nmi(struct acpi_subtable_header *header, 307 const unsigned long end) 308 { 309 struct acpi_madt_local_x2apic_nmi *x2apic_nmi = NULL; 310 311 x2apic_nmi = (struct acpi_madt_local_x2apic_nmi *)header; 312 313 if (BAD_MADT_ENTRY(x2apic_nmi, end)) 314 return -EINVAL; 315 316 acpi_table_print_madt_entry(header); 317 318 if (x2apic_nmi->lint != 1) 319 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n"); 320 321 return 0; 322 } 323 324 static int __init 325 acpi_parse_lapic_nmi(struct acpi_subtable_header * header, const unsigned long end) 326 { 327 struct acpi_madt_local_apic_nmi *lapic_nmi = NULL; 328 329 lapic_nmi = (struct acpi_madt_local_apic_nmi *)header; 330 331 if (BAD_MADT_ENTRY(lapic_nmi, end)) 332 return -EINVAL; 333 334 acpi_table_print_madt_entry(header); 335 336 if (lapic_nmi->lint != 1) 337 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n"); 338 339 return 0; 340 } 341 342 #endif /*CONFIG_X86_LOCAL_APIC */ 343 344 #ifdef CONFIG_X86_IO_APIC 345 346 static int __init 347 acpi_parse_ioapic(struct acpi_subtable_header * header, const unsigned long end) 348 { 349 struct acpi_madt_io_apic *ioapic = NULL; 350 351 ioapic = (struct acpi_madt_io_apic *)header; 352 353 if (BAD_MADT_ENTRY(ioapic, end)) 354 return -EINVAL; 355 356 acpi_table_print_madt_entry(header); 357 358 mp_register_ioapic(ioapic->id, 359 ioapic->address, ioapic->global_irq_base); 360 361 return 0; 362 } 363 364 /* 365 * Parse Interrupt Source Override for the ACPI SCI 366 */ 367 static void __init acpi_sci_ioapic_setup(u8 bus_irq, u16 polarity, u16 trigger, u32 gsi) 368 { 369 if (trigger == 0) /* compatible SCI trigger is level */ 370 trigger = 3; 371 372 if (polarity == 0) /* compatible SCI polarity is low */ 373 polarity = 3; 374 375 /* Command-line over-ride via acpi_sci= */ 376 if (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) 377 trigger = (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2; 378 379 if (acpi_sci_flags & ACPI_MADT_POLARITY_MASK) 380 polarity = acpi_sci_flags & ACPI_MADT_POLARITY_MASK; 381 382 /* 383 * mp_config_acpi_legacy_irqs() already setup IRQs < 16 384 * If GSI is < 16, this will update its flags, 385 * else it will create a new mp_irqs[] entry. 386 */ 387 mp_override_legacy_irq(bus_irq, polarity, trigger, gsi); 388 389 /* 390 * stash over-ride to indicate we've been here 391 * and for later update of acpi_gbl_FADT 392 */ 393 acpi_sci_override_gsi = gsi; 394 return; 395 } 396 397 static int __init 398 acpi_parse_int_src_ovr(struct acpi_subtable_header * header, 399 const unsigned long end) 400 { 401 struct acpi_madt_interrupt_override *intsrc = NULL; 402 403 intsrc = (struct acpi_madt_interrupt_override *)header; 404 405 if (BAD_MADT_ENTRY(intsrc, end)) 406 return -EINVAL; 407 408 acpi_table_print_madt_entry(header); 409 410 if (intsrc->source_irq == acpi_gbl_FADT.sci_interrupt) { 411 acpi_sci_ioapic_setup(intsrc->source_irq, 412 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK, 413 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2, 414 intsrc->global_irq); 415 return 0; 416 } 417 418 if (acpi_skip_timer_override && 419 intsrc->source_irq == 0 && intsrc->global_irq == 2) { 420 printk(PREFIX "BIOS IRQ0 pin2 override ignored.\n"); 421 return 0; 422 } 423 424 mp_override_legacy_irq(intsrc->source_irq, 425 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK, 426 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2, 427 intsrc->global_irq); 428 429 return 0; 430 } 431 432 static int __init 433 acpi_parse_nmi_src(struct acpi_subtable_header * header, const unsigned long end) 434 { 435 struct acpi_madt_nmi_source *nmi_src = NULL; 436 437 nmi_src = (struct acpi_madt_nmi_source *)header; 438 439 if (BAD_MADT_ENTRY(nmi_src, end)) 440 return -EINVAL; 441 442 acpi_table_print_madt_entry(header); 443 444 /* TBD: Support nimsrc entries? */ 445 446 return 0; 447 } 448 449 #endif /* CONFIG_X86_IO_APIC */ 450 451 /* 452 * acpi_pic_sci_set_trigger() 453 * 454 * use ELCR to set PIC-mode trigger type for SCI 455 * 456 * If a PIC-mode SCI is not recognized or gives spurious IRQ7's 457 * it may require Edge Trigger -- use "acpi_sci=edge" 458 * 459 * Port 0x4d0-4d1 are ECLR1 and ECLR2, the Edge/Level Control Registers 460 * for the 8259 PIC. bit[n] = 1 means irq[n] is Level, otherwise Edge. 461 * ECLR1 is IRQs 0-7 (IRQ 0, 1, 2 must be 0) 462 * ECLR2 is IRQs 8-15 (IRQ 8, 13 must be 0) 463 */ 464 465 void __init acpi_pic_sci_set_trigger(unsigned int irq, u16 trigger) 466 { 467 unsigned int mask = 1 << irq; 468 unsigned int old, new; 469 470 /* Real old ELCR mask */ 471 old = inb(0x4d0) | (inb(0x4d1) << 8); 472 473 /* 474 * If we use ACPI to set PCI IRQs, then we should clear ELCR 475 * since we will set it correctly as we enable the PCI irq 476 * routing. 477 */ 478 new = acpi_noirq ? old : 0; 479 480 /* 481 * Update SCI information in the ELCR, it isn't in the PCI 482 * routing tables.. 483 */ 484 switch (trigger) { 485 case 1: /* Edge - clear */ 486 new &= ~mask; 487 break; 488 case 3: /* Level - set */ 489 new |= mask; 490 break; 491 } 492 493 if (old == new) 494 return; 495 496 printk(PREFIX "setting ELCR to %04x (from %04x)\n", new, old); 497 outb(new, 0x4d0); 498 outb(new >> 8, 0x4d1); 499 } 500 501 int acpi_gsi_to_irq(u32 gsi, unsigned int *irq) 502 { 503 *irq = gsi_to_irq(gsi); 504 505 #ifdef CONFIG_X86_IO_APIC 506 if (acpi_irq_model == ACPI_IRQ_MODEL_IOAPIC) 507 setup_IO_APIC_irq_extra(gsi); 508 #endif 509 510 return 0; 511 } 512 EXPORT_SYMBOL_GPL(acpi_gsi_to_irq); 513 514 int acpi_isa_irq_to_gsi(unsigned isa_irq, u32 *gsi) 515 { 516 if (isa_irq >= 16) 517 return -1; 518 *gsi = irq_to_gsi(isa_irq); 519 return 0; 520 } 521 522 static int acpi_register_gsi_pic(struct device *dev, u32 gsi, 523 int trigger, int polarity) 524 { 525 #ifdef CONFIG_PCI 526 /* 527 * Make sure all (legacy) PCI IRQs are set as level-triggered. 528 */ 529 if (trigger == ACPI_LEVEL_SENSITIVE) 530 eisa_set_level_irq(gsi); 531 #endif 532 533 return gsi; 534 } 535 536 static int acpi_register_gsi_ioapic(struct device *dev, u32 gsi, 537 int trigger, int polarity) 538 { 539 #ifdef CONFIG_X86_IO_APIC 540 gsi = mp_register_gsi(dev, gsi, trigger, polarity); 541 #endif 542 543 return gsi; 544 } 545 546 int (*__acpi_register_gsi)(struct device *dev, u32 gsi, 547 int trigger, int polarity) = acpi_register_gsi_pic; 548 549 /* 550 * success: return IRQ number (>=0) 551 * failure: return < 0 552 */ 553 int acpi_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity) 554 { 555 unsigned int irq; 556 unsigned int plat_gsi = gsi; 557 558 plat_gsi = (*__acpi_register_gsi)(dev, gsi, trigger, polarity); 559 irq = gsi_to_irq(plat_gsi); 560 561 return irq; 562 } 563 564 void __init acpi_set_irq_model_pic(void) 565 { 566 acpi_irq_model = ACPI_IRQ_MODEL_PIC; 567 __acpi_register_gsi = acpi_register_gsi_pic; 568 acpi_ioapic = 0; 569 } 570 571 void __init acpi_set_irq_model_ioapic(void) 572 { 573 acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC; 574 __acpi_register_gsi = acpi_register_gsi_ioapic; 575 acpi_ioapic = 1; 576 } 577 578 /* 579 * ACPI based hotplug support for CPU 580 */ 581 #ifdef CONFIG_ACPI_HOTPLUG_CPU 582 #include <acpi/processor.h> 583 584 static void acpi_map_cpu2node(acpi_handle handle, int cpu, int physid) 585 { 586 #ifdef CONFIG_ACPI_NUMA 587 int nid; 588 589 nid = acpi_get_node(handle); 590 if (nid == -1 || !node_online(nid)) 591 return; 592 #ifdef CONFIG_X86_64 593 apicid_to_node[physid] = nid; 594 numa_set_node(cpu, nid); 595 #else /* CONFIG_X86_32 */ 596 apicid_2_node[physid] = nid; 597 cpu_to_node_map[cpu] = nid; 598 #endif 599 600 #endif 601 } 602 603 static int __cpuinit _acpi_map_lsapic(acpi_handle handle, int *pcpu) 604 { 605 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; 606 union acpi_object *obj; 607 struct acpi_madt_local_apic *lapic; 608 cpumask_var_t tmp_map, new_map; 609 u8 physid; 610 int cpu; 611 int retval = -ENOMEM; 612 613 if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer))) 614 return -EINVAL; 615 616 if (!buffer.length || !buffer.pointer) 617 return -EINVAL; 618 619 obj = buffer.pointer; 620 if (obj->type != ACPI_TYPE_BUFFER || 621 obj->buffer.length < sizeof(*lapic)) { 622 kfree(buffer.pointer); 623 return -EINVAL; 624 } 625 626 lapic = (struct acpi_madt_local_apic *)obj->buffer.pointer; 627 628 if (lapic->header.type != ACPI_MADT_TYPE_LOCAL_APIC || 629 !(lapic->lapic_flags & ACPI_MADT_ENABLED)) { 630 kfree(buffer.pointer); 631 return -EINVAL; 632 } 633 634 physid = lapic->id; 635 636 kfree(buffer.pointer); 637 buffer.length = ACPI_ALLOCATE_BUFFER; 638 buffer.pointer = NULL; 639 640 if (!alloc_cpumask_var(&tmp_map, GFP_KERNEL)) 641 goto out; 642 643 if (!alloc_cpumask_var(&new_map, GFP_KERNEL)) 644 goto free_tmp_map; 645 646 cpumask_copy(tmp_map, cpu_present_mask); 647 acpi_register_lapic(physid, lapic->lapic_flags & ACPI_MADT_ENABLED); 648 649 /* 650 * If mp_register_lapic successfully generates a new logical cpu 651 * number, then the following will get us exactly what was mapped 652 */ 653 cpumask_andnot(new_map, cpu_present_mask, tmp_map); 654 if (cpumask_empty(new_map)) { 655 printk ("Unable to map lapic to logical cpu number\n"); 656 retval = -EINVAL; 657 goto free_new_map; 658 } 659 660 acpi_processor_set_pdc(handle); 661 662 cpu = cpumask_first(new_map); 663 acpi_map_cpu2node(handle, cpu, physid); 664 665 *pcpu = cpu; 666 retval = 0; 667 668 free_new_map: 669 free_cpumask_var(new_map); 670 free_tmp_map: 671 free_cpumask_var(tmp_map); 672 out: 673 return retval; 674 } 675 676 /* wrapper to silence section mismatch warning */ 677 int __ref acpi_map_lsapic(acpi_handle handle, int *pcpu) 678 { 679 return _acpi_map_lsapic(handle, pcpu); 680 } 681 EXPORT_SYMBOL(acpi_map_lsapic); 682 683 int acpi_unmap_lsapic(int cpu) 684 { 685 per_cpu(x86_cpu_to_apicid, cpu) = -1; 686 set_cpu_present(cpu, false); 687 num_processors--; 688 689 return (0); 690 } 691 692 EXPORT_SYMBOL(acpi_unmap_lsapic); 693 #endif /* CONFIG_ACPI_HOTPLUG_CPU */ 694 695 int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base) 696 { 697 /* TBD */ 698 return -EINVAL; 699 } 700 701 EXPORT_SYMBOL(acpi_register_ioapic); 702 703 int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base) 704 { 705 /* TBD */ 706 return -EINVAL; 707 } 708 709 EXPORT_SYMBOL(acpi_unregister_ioapic); 710 711 static int __init acpi_parse_sbf(struct acpi_table_header *table) 712 { 713 struct acpi_table_boot *sb; 714 715 sb = (struct acpi_table_boot *)table; 716 if (!sb) { 717 printk(KERN_WARNING PREFIX "Unable to map SBF\n"); 718 return -ENODEV; 719 } 720 721 sbf_port = sb->cmos_index; /* Save CMOS port */ 722 723 return 0; 724 } 725 726 #ifdef CONFIG_HPET_TIMER 727 #include <asm/hpet.h> 728 729 static struct __initdata resource *hpet_res; 730 731 static int __init acpi_parse_hpet(struct acpi_table_header *table) 732 { 733 struct acpi_table_hpet *hpet_tbl; 734 735 hpet_tbl = (struct acpi_table_hpet *)table; 736 if (!hpet_tbl) { 737 printk(KERN_WARNING PREFIX "Unable to map HPET\n"); 738 return -ENODEV; 739 } 740 741 if (hpet_tbl->address.space_id != ACPI_SPACE_MEM) { 742 printk(KERN_WARNING PREFIX "HPET timers must be located in " 743 "memory.\n"); 744 return -1; 745 } 746 747 hpet_address = hpet_tbl->address.address; 748 hpet_blockid = hpet_tbl->sequence; 749 750 /* 751 * Some broken BIOSes advertise HPET at 0x0. We really do not 752 * want to allocate a resource there. 753 */ 754 if (!hpet_address) { 755 printk(KERN_WARNING PREFIX 756 "HPET id: %#x base: %#lx is invalid\n", 757 hpet_tbl->id, hpet_address); 758 return 0; 759 } 760 #ifdef CONFIG_X86_64 761 /* 762 * Some even more broken BIOSes advertise HPET at 763 * 0xfed0000000000000 instead of 0xfed00000. Fix it up and add 764 * some noise: 765 */ 766 if (hpet_address == 0xfed0000000000000UL) { 767 if (!hpet_force_user) { 768 printk(KERN_WARNING PREFIX "HPET id: %#x " 769 "base: 0xfed0000000000000 is bogus\n " 770 "try hpet=force on the kernel command line to " 771 "fix it up to 0xfed00000.\n", hpet_tbl->id); 772 hpet_address = 0; 773 return 0; 774 } 775 printk(KERN_WARNING PREFIX 776 "HPET id: %#x base: 0xfed0000000000000 fixed up " 777 "to 0xfed00000.\n", hpet_tbl->id); 778 hpet_address >>= 32; 779 } 780 #endif 781 printk(KERN_INFO PREFIX "HPET id: %#x base: %#lx\n", 782 hpet_tbl->id, hpet_address); 783 784 /* 785 * Allocate and initialize the HPET firmware resource for adding into 786 * the resource tree during the lateinit timeframe. 787 */ 788 #define HPET_RESOURCE_NAME_SIZE 9 789 hpet_res = alloc_bootmem(sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE); 790 791 hpet_res->name = (void *)&hpet_res[1]; 792 hpet_res->flags = IORESOURCE_MEM; 793 snprintf((char *)hpet_res->name, HPET_RESOURCE_NAME_SIZE, "HPET %u", 794 hpet_tbl->sequence); 795 796 hpet_res->start = hpet_address; 797 hpet_res->end = hpet_address + (1 * 1024) - 1; 798 799 return 0; 800 } 801 802 /* 803 * hpet_insert_resource inserts the HPET resources used into the resource 804 * tree. 805 */ 806 static __init int hpet_insert_resource(void) 807 { 808 if (!hpet_res) 809 return 1; 810 811 return insert_resource(&iomem_resource, hpet_res); 812 } 813 814 late_initcall(hpet_insert_resource); 815 816 #else 817 #define acpi_parse_hpet NULL 818 #endif 819 820 static int __init acpi_parse_fadt(struct acpi_table_header *table) 821 { 822 823 #ifdef CONFIG_X86_PM_TIMER 824 /* detect the location of the ACPI PM Timer */ 825 if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID) { 826 /* FADT rev. 2 */ 827 if (acpi_gbl_FADT.xpm_timer_block.space_id != 828 ACPI_ADR_SPACE_SYSTEM_IO) 829 return 0; 830 831 pmtmr_ioport = acpi_gbl_FADT.xpm_timer_block.address; 832 /* 833 * "X" fields are optional extensions to the original V1.0 834 * fields, so we must selectively expand V1.0 fields if the 835 * corresponding X field is zero. 836 */ 837 if (!pmtmr_ioport) 838 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block; 839 } else { 840 /* FADT rev. 1 */ 841 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block; 842 } 843 if (pmtmr_ioport) 844 printk(KERN_INFO PREFIX "PM-Timer IO Port: %#x\n", 845 pmtmr_ioport); 846 #endif 847 return 0; 848 } 849 850 #ifdef CONFIG_X86_LOCAL_APIC 851 /* 852 * Parse LAPIC entries in MADT 853 * returns 0 on success, < 0 on error 854 */ 855 856 static int __init early_acpi_parse_madt_lapic_addr_ovr(void) 857 { 858 int count; 859 860 if (!cpu_has_apic) 861 return -ENODEV; 862 863 /* 864 * Note that the LAPIC address is obtained from the MADT (32-bit value) 865 * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value). 866 */ 867 868 count = 869 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE, 870 acpi_parse_lapic_addr_ovr, 0); 871 if (count < 0) { 872 printk(KERN_ERR PREFIX 873 "Error parsing LAPIC address override entry\n"); 874 return count; 875 } 876 877 register_lapic_address(acpi_lapic_addr); 878 879 return count; 880 } 881 882 static int __init acpi_parse_madt_lapic_entries(void) 883 { 884 int count; 885 int x2count = 0; 886 887 if (!cpu_has_apic) 888 return -ENODEV; 889 890 /* 891 * Note that the LAPIC address is obtained from the MADT (32-bit value) 892 * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value). 893 */ 894 895 count = 896 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE, 897 acpi_parse_lapic_addr_ovr, 0); 898 if (count < 0) { 899 printk(KERN_ERR PREFIX 900 "Error parsing LAPIC address override entry\n"); 901 return count; 902 } 903 904 register_lapic_address(acpi_lapic_addr); 905 906 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC, 907 acpi_parse_sapic, MAX_LOCAL_APIC); 908 909 if (!count) { 910 x2count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC, 911 acpi_parse_x2apic, MAX_LOCAL_APIC); 912 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC, 913 acpi_parse_lapic, MAX_LOCAL_APIC); 914 } 915 if (!count && !x2count) { 916 printk(KERN_ERR PREFIX "No LAPIC entries present\n"); 917 /* TBD: Cleanup to allow fallback to MPS */ 918 return -ENODEV; 919 } else if (count < 0 || x2count < 0) { 920 printk(KERN_ERR PREFIX "Error parsing LAPIC entry\n"); 921 /* TBD: Cleanup to allow fallback to MPS */ 922 return count; 923 } 924 925 x2count = 926 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC_NMI, 927 acpi_parse_x2apic_nmi, 0); 928 count = 929 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI, acpi_parse_lapic_nmi, 0); 930 if (count < 0 || x2count < 0) { 931 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n"); 932 /* TBD: Cleanup to allow fallback to MPS */ 933 return count; 934 } 935 return 0; 936 } 937 #endif /* CONFIG_X86_LOCAL_APIC */ 938 939 #ifdef CONFIG_X86_IO_APIC 940 #define MP_ISA_BUS 0 941 942 #ifdef CONFIG_X86_ES7000 943 extern int es7000_plat; 944 #endif 945 946 void __init mp_override_legacy_irq(u8 bus_irq, u8 polarity, u8 trigger, u32 gsi) 947 { 948 int ioapic; 949 int pin; 950 struct mpc_intsrc mp_irq; 951 952 /* 953 * Convert 'gsi' to 'ioapic.pin'. 954 */ 955 ioapic = mp_find_ioapic(gsi); 956 if (ioapic < 0) 957 return; 958 pin = mp_find_ioapic_pin(ioapic, gsi); 959 960 /* 961 * TBD: This check is for faulty timer entries, where the override 962 * erroneously sets the trigger to level, resulting in a HUGE 963 * increase of timer interrupts! 964 */ 965 if ((bus_irq == 0) && (trigger == 3)) 966 trigger = 1; 967 968 mp_irq.type = MP_INTSRC; 969 mp_irq.irqtype = mp_INT; 970 mp_irq.irqflag = (trigger << 2) | polarity; 971 mp_irq.srcbus = MP_ISA_BUS; 972 mp_irq.srcbusirq = bus_irq; /* IRQ */ 973 mp_irq.dstapic = mp_ioapics[ioapic].apicid; /* APIC ID */ 974 mp_irq.dstirq = pin; /* INTIN# */ 975 976 mp_save_irq(&mp_irq); 977 978 isa_irq_to_gsi[bus_irq] = gsi; 979 } 980 981 void __init mp_config_acpi_legacy_irqs(void) 982 { 983 int i; 984 struct mpc_intsrc mp_irq; 985 986 #if defined (CONFIG_MCA) || defined (CONFIG_EISA) 987 /* 988 * Fabricate the legacy ISA bus (bus #31). 989 */ 990 mp_bus_id_to_type[MP_ISA_BUS] = MP_BUS_ISA; 991 #endif 992 set_bit(MP_ISA_BUS, mp_bus_not_pci); 993 pr_debug("Bus #%d is ISA\n", MP_ISA_BUS); 994 995 #ifdef CONFIG_X86_ES7000 996 /* 997 * Older generations of ES7000 have no legacy identity mappings 998 */ 999 if (es7000_plat == 1) 1000 return; 1001 #endif 1002 1003 /* 1004 * Use the default configuration for the IRQs 0-15. Unless 1005 * overridden by (MADT) interrupt source override entries. 1006 */ 1007 for (i = 0; i < 16; i++) { 1008 int ioapic, pin; 1009 unsigned int dstapic; 1010 int idx; 1011 u32 gsi; 1012 1013 /* Locate the gsi that irq i maps to. */ 1014 if (acpi_isa_irq_to_gsi(i, &gsi)) 1015 continue; 1016 1017 /* 1018 * Locate the IOAPIC that manages the ISA IRQ. 1019 */ 1020 ioapic = mp_find_ioapic(gsi); 1021 if (ioapic < 0) 1022 continue; 1023 pin = mp_find_ioapic_pin(ioapic, gsi); 1024 dstapic = mp_ioapics[ioapic].apicid; 1025 1026 for (idx = 0; idx < mp_irq_entries; idx++) { 1027 struct mpc_intsrc *irq = mp_irqs + idx; 1028 1029 /* Do we already have a mapping for this ISA IRQ? */ 1030 if (irq->srcbus == MP_ISA_BUS && irq->srcbusirq == i) 1031 break; 1032 1033 /* Do we already have a mapping for this IOAPIC pin */ 1034 if (irq->dstapic == dstapic && irq->dstirq == pin) 1035 break; 1036 } 1037 1038 if (idx != mp_irq_entries) { 1039 printk(KERN_DEBUG "ACPI: IRQ%d used by override.\n", i); 1040 continue; /* IRQ already used */ 1041 } 1042 1043 mp_irq.type = MP_INTSRC; 1044 mp_irq.irqflag = 0; /* Conforming */ 1045 mp_irq.srcbus = MP_ISA_BUS; 1046 mp_irq.dstapic = dstapic; 1047 mp_irq.irqtype = mp_INT; 1048 mp_irq.srcbusirq = i; /* Identity mapped */ 1049 mp_irq.dstirq = pin; 1050 1051 mp_save_irq(&mp_irq); 1052 } 1053 } 1054 1055 static int mp_config_acpi_gsi(struct device *dev, u32 gsi, int trigger, 1056 int polarity) 1057 { 1058 #ifdef CONFIG_X86_MPPARSE 1059 struct mpc_intsrc mp_irq; 1060 struct pci_dev *pdev; 1061 unsigned char number; 1062 unsigned int devfn; 1063 int ioapic; 1064 u8 pin; 1065 1066 if (!acpi_ioapic) 1067 return 0; 1068 if (!dev) 1069 return 0; 1070 if (dev->bus != &pci_bus_type) 1071 return 0; 1072 1073 pdev = to_pci_dev(dev); 1074 number = pdev->bus->number; 1075 devfn = pdev->devfn; 1076 pin = pdev->pin; 1077 /* print the entry should happen on mptable identically */ 1078 mp_irq.type = MP_INTSRC; 1079 mp_irq.irqtype = mp_INT; 1080 mp_irq.irqflag = (trigger == ACPI_EDGE_SENSITIVE ? 4 : 0x0c) | 1081 (polarity == ACPI_ACTIVE_HIGH ? 1 : 3); 1082 mp_irq.srcbus = number; 1083 mp_irq.srcbusirq = (((devfn >> 3) & 0x1f) << 2) | ((pin - 1) & 3); 1084 ioapic = mp_find_ioapic(gsi); 1085 mp_irq.dstapic = mp_ioapics[ioapic].apicid; 1086 mp_irq.dstirq = mp_find_ioapic_pin(ioapic, gsi); 1087 1088 mp_save_irq(&mp_irq); 1089 #endif 1090 return 0; 1091 } 1092 1093 int mp_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity) 1094 { 1095 int ioapic; 1096 int ioapic_pin; 1097 struct io_apic_irq_attr irq_attr; 1098 1099 if (acpi_irq_model != ACPI_IRQ_MODEL_IOAPIC) 1100 return gsi; 1101 1102 /* Don't set up the ACPI SCI because it's already set up */ 1103 if (acpi_gbl_FADT.sci_interrupt == gsi) 1104 return gsi; 1105 1106 ioapic = mp_find_ioapic(gsi); 1107 if (ioapic < 0) { 1108 printk(KERN_WARNING "No IOAPIC for GSI %u\n", gsi); 1109 return gsi; 1110 } 1111 1112 ioapic_pin = mp_find_ioapic_pin(ioapic, gsi); 1113 1114 if (ioapic_pin > MP_MAX_IOAPIC_PIN) { 1115 printk(KERN_ERR "Invalid reference to IOAPIC pin " 1116 "%d-%d\n", mp_ioapics[ioapic].apicid, 1117 ioapic_pin); 1118 return gsi; 1119 } 1120 1121 if (enable_update_mptable) 1122 mp_config_acpi_gsi(dev, gsi, trigger, polarity); 1123 1124 set_io_apic_irq_attr(&irq_attr, ioapic, ioapic_pin, 1125 trigger == ACPI_EDGE_SENSITIVE ? 0 : 1, 1126 polarity == ACPI_ACTIVE_HIGH ? 0 : 1); 1127 io_apic_set_pci_routing(dev, gsi_to_irq(gsi), &irq_attr); 1128 1129 return gsi; 1130 } 1131 1132 /* 1133 * Parse IOAPIC related entries in MADT 1134 * returns 0 on success, < 0 on error 1135 */ 1136 static int __init acpi_parse_madt_ioapic_entries(void) 1137 { 1138 int count; 1139 1140 /* 1141 * ACPI interpreter is required to complete interrupt setup, 1142 * so if it is off, don't enumerate the io-apics with ACPI. 1143 * If MPS is present, it will handle them, 1144 * otherwise the system will stay in PIC mode 1145 */ 1146 if (acpi_disabled || acpi_noirq) 1147 return -ENODEV; 1148 1149 if (!cpu_has_apic) 1150 return -ENODEV; 1151 1152 /* 1153 * if "noapic" boot option, don't look for IO-APICs 1154 */ 1155 if (skip_ioapic_setup) { 1156 printk(KERN_INFO PREFIX "Skipping IOAPIC probe " 1157 "due to 'noapic' option.\n"); 1158 return -ENODEV; 1159 } 1160 1161 count = 1162 acpi_table_parse_madt(ACPI_MADT_TYPE_IO_APIC, acpi_parse_ioapic, 1163 MAX_IO_APICS); 1164 if (!count) { 1165 printk(KERN_ERR PREFIX "No IOAPIC entries present\n"); 1166 return -ENODEV; 1167 } else if (count < 0) { 1168 printk(KERN_ERR PREFIX "Error parsing IOAPIC entry\n"); 1169 return count; 1170 } 1171 1172 count = 1173 acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE, acpi_parse_int_src_ovr, 1174 nr_irqs); 1175 if (count < 0) { 1176 printk(KERN_ERR PREFIX 1177 "Error parsing interrupt source overrides entry\n"); 1178 /* TBD: Cleanup to allow fallback to MPS */ 1179 return count; 1180 } 1181 1182 /* 1183 * If BIOS did not supply an INT_SRC_OVR for the SCI 1184 * pretend we got one so we can set the SCI flags. 1185 */ 1186 if (!acpi_sci_override_gsi) 1187 acpi_sci_ioapic_setup(acpi_gbl_FADT.sci_interrupt, 0, 0, 1188 acpi_gbl_FADT.sci_interrupt); 1189 1190 /* Fill in identity legacy mappings where no override */ 1191 mp_config_acpi_legacy_irqs(); 1192 1193 count = 1194 acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE, acpi_parse_nmi_src, 1195 nr_irqs); 1196 if (count < 0) { 1197 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n"); 1198 /* TBD: Cleanup to allow fallback to MPS */ 1199 return count; 1200 } 1201 1202 return 0; 1203 } 1204 #else 1205 static inline int acpi_parse_madt_ioapic_entries(void) 1206 { 1207 return -1; 1208 } 1209 #endif /* !CONFIG_X86_IO_APIC */ 1210 1211 static void __init early_acpi_process_madt(void) 1212 { 1213 #ifdef CONFIG_X86_LOCAL_APIC 1214 int error; 1215 1216 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) { 1217 1218 /* 1219 * Parse MADT LAPIC entries 1220 */ 1221 error = early_acpi_parse_madt_lapic_addr_ovr(); 1222 if (!error) { 1223 acpi_lapic = 1; 1224 smp_found_config = 1; 1225 } 1226 if (error == -EINVAL) { 1227 /* 1228 * Dell Precision Workstation 410, 610 come here. 1229 */ 1230 printk(KERN_ERR PREFIX 1231 "Invalid BIOS MADT, disabling ACPI\n"); 1232 disable_acpi(); 1233 } 1234 } 1235 #endif 1236 } 1237 1238 static void __init acpi_process_madt(void) 1239 { 1240 #ifdef CONFIG_X86_LOCAL_APIC 1241 int error; 1242 1243 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) { 1244 1245 /* 1246 * Parse MADT LAPIC entries 1247 */ 1248 error = acpi_parse_madt_lapic_entries(); 1249 if (!error) { 1250 acpi_lapic = 1; 1251 1252 /* 1253 * Parse MADT IO-APIC entries 1254 */ 1255 error = acpi_parse_madt_ioapic_entries(); 1256 if (!error) { 1257 acpi_set_irq_model_ioapic(); 1258 1259 smp_found_config = 1; 1260 } 1261 } 1262 if (error == -EINVAL) { 1263 /* 1264 * Dell Precision Workstation 410, 610 come here. 1265 */ 1266 printk(KERN_ERR PREFIX 1267 "Invalid BIOS MADT, disabling ACPI\n"); 1268 disable_acpi(); 1269 } 1270 } else { 1271 /* 1272 * ACPI found no MADT, and so ACPI wants UP PIC mode. 1273 * In the event an MPS table was found, forget it. 1274 * Boot with "acpi=off" to use MPS on such a system. 1275 */ 1276 if (smp_found_config) { 1277 printk(KERN_WARNING PREFIX 1278 "No APIC-table, disabling MPS\n"); 1279 smp_found_config = 0; 1280 } 1281 } 1282 1283 /* 1284 * ACPI supports both logical (e.g. Hyper-Threading) and physical 1285 * processors, where MPS only supports physical. 1286 */ 1287 if (acpi_lapic && acpi_ioapic) 1288 printk(KERN_INFO "Using ACPI (MADT) for SMP configuration " 1289 "information\n"); 1290 else if (acpi_lapic) 1291 printk(KERN_INFO "Using ACPI for processor (LAPIC) " 1292 "configuration information\n"); 1293 #endif 1294 return; 1295 } 1296 1297 static int __init disable_acpi_irq(const struct dmi_system_id *d) 1298 { 1299 if (!acpi_force) { 1300 printk(KERN_NOTICE "%s detected: force use of acpi=noirq\n", 1301 d->ident); 1302 acpi_noirq_set(); 1303 } 1304 return 0; 1305 } 1306 1307 static int __init disable_acpi_pci(const struct dmi_system_id *d) 1308 { 1309 if (!acpi_force) { 1310 printk(KERN_NOTICE "%s detected: force use of pci=noacpi\n", 1311 d->ident); 1312 acpi_disable_pci(); 1313 } 1314 return 0; 1315 } 1316 1317 static int __init dmi_disable_acpi(const struct dmi_system_id *d) 1318 { 1319 if (!acpi_force) { 1320 printk(KERN_NOTICE "%s detected: acpi off\n", d->ident); 1321 disable_acpi(); 1322 } else { 1323 printk(KERN_NOTICE 1324 "Warning: DMI blacklist says broken, but acpi forced\n"); 1325 } 1326 return 0; 1327 } 1328 1329 /* 1330 * Force ignoring BIOS IRQ0 pin2 override 1331 */ 1332 static int __init dmi_ignore_irq0_timer_override(const struct dmi_system_id *d) 1333 { 1334 /* 1335 * The ati_ixp4x0_rev() early PCI quirk should have set 1336 * the acpi_skip_timer_override flag already: 1337 */ 1338 if (!acpi_skip_timer_override) { 1339 WARN(1, KERN_ERR "ati_ixp4x0 quirk not complete.\n"); 1340 pr_notice("%s detected: Ignoring BIOS IRQ0 pin2 override\n", 1341 d->ident); 1342 acpi_skip_timer_override = 1; 1343 } 1344 return 0; 1345 } 1346 1347 /* 1348 * If your system is blacklisted here, but you find that acpi=force 1349 * works for you, please contact linux-acpi@vger.kernel.org 1350 */ 1351 static struct dmi_system_id __initdata acpi_dmi_table[] = { 1352 /* 1353 * Boxes that need ACPI disabled 1354 */ 1355 { 1356 .callback = dmi_disable_acpi, 1357 .ident = "IBM Thinkpad", 1358 .matches = { 1359 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), 1360 DMI_MATCH(DMI_BOARD_NAME, "2629H1G"), 1361 }, 1362 }, 1363 1364 /* 1365 * Boxes that need ACPI PCI IRQ routing disabled 1366 */ 1367 { 1368 .callback = disable_acpi_irq, 1369 .ident = "ASUS A7V", 1370 .matches = { 1371 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC"), 1372 DMI_MATCH(DMI_BOARD_NAME, "<A7V>"), 1373 /* newer BIOS, Revision 1011, does work */ 1374 DMI_MATCH(DMI_BIOS_VERSION, 1375 "ASUS A7V ACPI BIOS Revision 1007"), 1376 }, 1377 }, 1378 { 1379 /* 1380 * Latest BIOS for IBM 600E (1.16) has bad pcinum 1381 * for LPC bridge, which is needed for the PCI 1382 * interrupt links to work. DSDT fix is in bug 5966. 1383 * 2645, 2646 model numbers are shared with 600/600E/600X 1384 */ 1385 .callback = disable_acpi_irq, 1386 .ident = "IBM Thinkpad 600 Series 2645", 1387 .matches = { 1388 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), 1389 DMI_MATCH(DMI_BOARD_NAME, "2645"), 1390 }, 1391 }, 1392 { 1393 .callback = disable_acpi_irq, 1394 .ident = "IBM Thinkpad 600 Series 2646", 1395 .matches = { 1396 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), 1397 DMI_MATCH(DMI_BOARD_NAME, "2646"), 1398 }, 1399 }, 1400 /* 1401 * Boxes that need ACPI PCI IRQ routing and PCI scan disabled 1402 */ 1403 { /* _BBN 0 bug */ 1404 .callback = disable_acpi_pci, 1405 .ident = "ASUS PR-DLS", 1406 .matches = { 1407 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."), 1408 DMI_MATCH(DMI_BOARD_NAME, "PR-DLS"), 1409 DMI_MATCH(DMI_BIOS_VERSION, 1410 "ASUS PR-DLS ACPI BIOS Revision 1010"), 1411 DMI_MATCH(DMI_BIOS_DATE, "03/21/2003") 1412 }, 1413 }, 1414 { 1415 .callback = disable_acpi_pci, 1416 .ident = "Acer TravelMate 36x Laptop", 1417 .matches = { 1418 DMI_MATCH(DMI_SYS_VENDOR, "Acer"), 1419 DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"), 1420 }, 1421 }, 1422 {} 1423 }; 1424 1425 /* second table for DMI checks that should run after early-quirks */ 1426 static struct dmi_system_id __initdata acpi_dmi_table_late[] = { 1427 /* 1428 * HP laptops which use a DSDT reporting as HP/SB400/10000, 1429 * which includes some code which overrides all temperature 1430 * trip points to 16C if the INTIN2 input of the I/O APIC 1431 * is enabled. This input is incorrectly designated the 1432 * ISA IRQ 0 via an interrupt source override even though 1433 * it is wired to the output of the master 8259A and INTIN0 1434 * is not connected at all. Force ignoring BIOS IRQ0 pin2 1435 * override in that cases. 1436 */ 1437 { 1438 .callback = dmi_ignore_irq0_timer_override, 1439 .ident = "HP nx6115 laptop", 1440 .matches = { 1441 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 1442 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6115"), 1443 }, 1444 }, 1445 { 1446 .callback = dmi_ignore_irq0_timer_override, 1447 .ident = "HP NX6125 laptop", 1448 .matches = { 1449 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 1450 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6125"), 1451 }, 1452 }, 1453 { 1454 .callback = dmi_ignore_irq0_timer_override, 1455 .ident = "HP NX6325 laptop", 1456 .matches = { 1457 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 1458 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6325"), 1459 }, 1460 }, 1461 { 1462 .callback = dmi_ignore_irq0_timer_override, 1463 .ident = "HP 6715b laptop", 1464 .matches = { 1465 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 1466 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq 6715b"), 1467 }, 1468 }, 1469 {} 1470 }; 1471 1472 /* 1473 * acpi_boot_table_init() and acpi_boot_init() 1474 * called from setup_arch(), always. 1475 * 1. checksums all tables 1476 * 2. enumerates lapics 1477 * 3. enumerates io-apics 1478 * 1479 * acpi_table_init() is separate to allow reading SRAT without 1480 * other side effects. 1481 * 1482 * side effects of acpi_boot_init: 1483 * acpi_lapic = 1 if LAPIC found 1484 * acpi_ioapic = 1 if IOAPIC found 1485 * if (acpi_lapic && acpi_ioapic) smp_found_config = 1; 1486 * if acpi_blacklisted() acpi_disabled = 1; 1487 * acpi_irq_model=... 1488 * ... 1489 */ 1490 1491 void __init acpi_boot_table_init(void) 1492 { 1493 dmi_check_system(acpi_dmi_table); 1494 1495 /* 1496 * If acpi_disabled, bail out 1497 */ 1498 if (acpi_disabled) 1499 return; 1500 1501 /* 1502 * Initialize the ACPI boot-time table parser. 1503 */ 1504 if (acpi_table_init()) { 1505 disable_acpi(); 1506 return; 1507 } 1508 1509 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf); 1510 1511 /* 1512 * blacklist may disable ACPI entirely 1513 */ 1514 if (acpi_blacklisted()) { 1515 if (acpi_force) { 1516 printk(KERN_WARNING PREFIX "acpi=force override\n"); 1517 } else { 1518 printk(KERN_WARNING PREFIX "Disabling ACPI support\n"); 1519 disable_acpi(); 1520 return; 1521 } 1522 } 1523 } 1524 1525 int __init early_acpi_boot_init(void) 1526 { 1527 /* 1528 * If acpi_disabled, bail out 1529 */ 1530 if (acpi_disabled) 1531 return 1; 1532 1533 /* 1534 * Process the Multiple APIC Description Table (MADT), if present 1535 */ 1536 early_acpi_process_madt(); 1537 1538 return 0; 1539 } 1540 1541 int __init acpi_boot_init(void) 1542 { 1543 /* those are executed after early-quirks are executed */ 1544 dmi_check_system(acpi_dmi_table_late); 1545 1546 /* 1547 * If acpi_disabled, bail out 1548 */ 1549 if (acpi_disabled) 1550 return 1; 1551 1552 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf); 1553 1554 /* 1555 * set sci_int and PM timer address 1556 */ 1557 acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt); 1558 1559 /* 1560 * Process the Multiple APIC Description Table (MADT), if present 1561 */ 1562 acpi_process_madt(); 1563 1564 acpi_table_parse(ACPI_SIG_HPET, acpi_parse_hpet); 1565 1566 if (!acpi_noirq) 1567 x86_init.pci.init = pci_acpi_init; 1568 1569 return 0; 1570 } 1571 1572 static int __init parse_acpi(char *arg) 1573 { 1574 if (!arg) 1575 return -EINVAL; 1576 1577 /* "acpi=off" disables both ACPI table parsing and interpreter */ 1578 if (strcmp(arg, "off") == 0) { 1579 disable_acpi(); 1580 } 1581 /* acpi=force to over-ride black-list */ 1582 else if (strcmp(arg, "force") == 0) { 1583 acpi_force = 1; 1584 acpi_disabled = 0; 1585 } 1586 /* acpi=strict disables out-of-spec workarounds */ 1587 else if (strcmp(arg, "strict") == 0) { 1588 acpi_strict = 1; 1589 } 1590 /* acpi=rsdt use RSDT instead of XSDT */ 1591 else if (strcmp(arg, "rsdt") == 0) { 1592 acpi_rsdt_forced = 1; 1593 } 1594 /* "acpi=noirq" disables ACPI interrupt routing */ 1595 else if (strcmp(arg, "noirq") == 0) { 1596 acpi_noirq_set(); 1597 } 1598 /* "acpi=copy_dsdt" copys DSDT */ 1599 else if (strcmp(arg, "copy_dsdt") == 0) { 1600 acpi_gbl_copy_dsdt_locally = 1; 1601 } else { 1602 /* Core will printk when we return error. */ 1603 return -EINVAL; 1604 } 1605 return 0; 1606 } 1607 early_param("acpi", parse_acpi); 1608 1609 /* FIXME: Using pci= for an ACPI parameter is a travesty. */ 1610 static int __init parse_pci(char *arg) 1611 { 1612 if (arg && strcmp(arg, "noacpi") == 0) 1613 acpi_disable_pci(); 1614 return 0; 1615 } 1616 early_param("pci", parse_pci); 1617 1618 int __init acpi_mps_check(void) 1619 { 1620 #if defined(CONFIG_X86_LOCAL_APIC) && !defined(CONFIG_X86_MPPARSE) 1621 /* mptable code is not built-in*/ 1622 if (acpi_disabled || acpi_noirq) { 1623 printk(KERN_WARNING "MPS support code is not built-in.\n" 1624 "Using acpi=off or acpi=noirq or pci=noacpi " 1625 "may have problem\n"); 1626 return 1; 1627 } 1628 #endif 1629 return 0; 1630 } 1631 1632 #ifdef CONFIG_X86_IO_APIC 1633 static int __init parse_acpi_skip_timer_override(char *arg) 1634 { 1635 acpi_skip_timer_override = 1; 1636 return 0; 1637 } 1638 early_param("acpi_skip_timer_override", parse_acpi_skip_timer_override); 1639 1640 static int __init parse_acpi_use_timer_override(char *arg) 1641 { 1642 acpi_use_timer_override = 1; 1643 return 0; 1644 } 1645 early_param("acpi_use_timer_override", parse_acpi_use_timer_override); 1646 #endif /* CONFIG_X86_IO_APIC */ 1647 1648 static int __init setup_acpi_sci(char *s) 1649 { 1650 if (!s) 1651 return -EINVAL; 1652 if (!strcmp(s, "edge")) 1653 acpi_sci_flags = ACPI_MADT_TRIGGER_EDGE | 1654 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK); 1655 else if (!strcmp(s, "level")) 1656 acpi_sci_flags = ACPI_MADT_TRIGGER_LEVEL | 1657 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK); 1658 else if (!strcmp(s, "high")) 1659 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_HIGH | 1660 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK); 1661 else if (!strcmp(s, "low")) 1662 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_LOW | 1663 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK); 1664 else 1665 return -EINVAL; 1666 return 0; 1667 } 1668 early_param("acpi_sci", setup_acpi_sci); 1669 1670 int __acpi_acquire_global_lock(unsigned int *lock) 1671 { 1672 unsigned int old, new, val; 1673 do { 1674 old = *lock; 1675 new = (((old & ~0x3) + 2) + ((old >> 1) & 0x1)); 1676 val = cmpxchg(lock, old, new); 1677 } while (unlikely (val != old)); 1678 return (new < 3) ? -1 : 0; 1679 } 1680 1681 int __acpi_release_global_lock(unsigned int *lock) 1682 { 1683 unsigned int old, new, val; 1684 do { 1685 old = *lock; 1686 new = old & ~0x3; 1687 val = cmpxchg(lock, old, new); 1688 } while (unlikely (val != old)); 1689 return old & 0x1; 1690 } 1691