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 } 512 513 int acpi_isa_irq_to_gsi(unsigned isa_irq, u32 *gsi) 514 { 515 if (isa_irq >= 16) 516 return -1; 517 *gsi = irq_to_gsi(isa_irq); 518 return 0; 519 } 520 521 static int acpi_register_gsi_pic(struct device *dev, u32 gsi, 522 int trigger, int polarity) 523 { 524 #ifdef CONFIG_PCI 525 /* 526 * Make sure all (legacy) PCI IRQs are set as level-triggered. 527 */ 528 if (trigger == ACPI_LEVEL_SENSITIVE) 529 eisa_set_level_irq(gsi); 530 #endif 531 532 return gsi; 533 } 534 535 static int acpi_register_gsi_ioapic(struct device *dev, u32 gsi, 536 int trigger, int polarity) 537 { 538 #ifdef CONFIG_X86_IO_APIC 539 gsi = mp_register_gsi(dev, gsi, trigger, polarity); 540 #endif 541 542 return gsi; 543 } 544 545 int (*__acpi_register_gsi)(struct device *dev, u32 gsi, 546 int trigger, int polarity) = acpi_register_gsi_pic; 547 548 /* 549 * success: return IRQ number (>=0) 550 * failure: return < 0 551 */ 552 int acpi_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity) 553 { 554 unsigned int irq; 555 unsigned int plat_gsi = gsi; 556 557 plat_gsi = (*__acpi_register_gsi)(dev, gsi, trigger, polarity); 558 irq = gsi_to_irq(plat_gsi); 559 560 return irq; 561 } 562 563 void __init acpi_set_irq_model_pic(void) 564 { 565 acpi_irq_model = ACPI_IRQ_MODEL_PIC; 566 __acpi_register_gsi = acpi_register_gsi_pic; 567 acpi_ioapic = 0; 568 } 569 570 void __init acpi_set_irq_model_ioapic(void) 571 { 572 acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC; 573 __acpi_register_gsi = acpi_register_gsi_ioapic; 574 acpi_ioapic = 1; 575 } 576 577 /* 578 * ACPI based hotplug support for CPU 579 */ 580 #ifdef CONFIG_ACPI_HOTPLUG_CPU 581 #include <acpi/processor.h> 582 583 static void acpi_map_cpu2node(acpi_handle handle, int cpu, int physid) 584 { 585 #ifdef CONFIG_ACPI_NUMA 586 int nid; 587 588 nid = acpi_get_node(handle); 589 if (nid == -1 || !node_online(nid)) 590 return; 591 #ifdef CONFIG_X86_64 592 apicid_to_node[physid] = nid; 593 numa_set_node(cpu, nid); 594 #else /* CONFIG_X86_32 */ 595 apicid_2_node[physid] = nid; 596 cpu_to_node_map[cpu] = nid; 597 #endif 598 599 #endif 600 } 601 602 static int __cpuinit _acpi_map_lsapic(acpi_handle handle, int *pcpu) 603 { 604 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; 605 union acpi_object *obj; 606 struct acpi_madt_local_apic *lapic; 607 cpumask_var_t tmp_map, new_map; 608 u8 physid; 609 int cpu; 610 int retval = -ENOMEM; 611 612 if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer))) 613 return -EINVAL; 614 615 if (!buffer.length || !buffer.pointer) 616 return -EINVAL; 617 618 obj = buffer.pointer; 619 if (obj->type != ACPI_TYPE_BUFFER || 620 obj->buffer.length < sizeof(*lapic)) { 621 kfree(buffer.pointer); 622 return -EINVAL; 623 } 624 625 lapic = (struct acpi_madt_local_apic *)obj->buffer.pointer; 626 627 if (lapic->header.type != ACPI_MADT_TYPE_LOCAL_APIC || 628 !(lapic->lapic_flags & ACPI_MADT_ENABLED)) { 629 kfree(buffer.pointer); 630 return -EINVAL; 631 } 632 633 physid = lapic->id; 634 635 kfree(buffer.pointer); 636 buffer.length = ACPI_ALLOCATE_BUFFER; 637 buffer.pointer = NULL; 638 639 if (!alloc_cpumask_var(&tmp_map, GFP_KERNEL)) 640 goto out; 641 642 if (!alloc_cpumask_var(&new_map, GFP_KERNEL)) 643 goto free_tmp_map; 644 645 cpumask_copy(tmp_map, cpu_present_mask); 646 acpi_register_lapic(physid, lapic->lapic_flags & ACPI_MADT_ENABLED); 647 648 /* 649 * If mp_register_lapic successfully generates a new logical cpu 650 * number, then the following will get us exactly what was mapped 651 */ 652 cpumask_andnot(new_map, cpu_present_mask, tmp_map); 653 if (cpumask_empty(new_map)) { 654 printk ("Unable to map lapic to logical cpu number\n"); 655 retval = -EINVAL; 656 goto free_new_map; 657 } 658 659 acpi_processor_set_pdc(handle); 660 661 cpu = cpumask_first(new_map); 662 acpi_map_cpu2node(handle, cpu, physid); 663 664 *pcpu = cpu; 665 retval = 0; 666 667 free_new_map: 668 free_cpumask_var(new_map); 669 free_tmp_map: 670 free_cpumask_var(tmp_map); 671 out: 672 return retval; 673 } 674 675 /* wrapper to silence section mismatch warning */ 676 int __ref acpi_map_lsapic(acpi_handle handle, int *pcpu) 677 { 678 return _acpi_map_lsapic(handle, pcpu); 679 } 680 EXPORT_SYMBOL(acpi_map_lsapic); 681 682 int acpi_unmap_lsapic(int cpu) 683 { 684 per_cpu(x86_cpu_to_apicid, cpu) = -1; 685 set_cpu_present(cpu, false); 686 num_processors--; 687 688 return (0); 689 } 690 691 EXPORT_SYMBOL(acpi_unmap_lsapic); 692 #endif /* CONFIG_ACPI_HOTPLUG_CPU */ 693 694 int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base) 695 { 696 /* TBD */ 697 return -EINVAL; 698 } 699 700 EXPORT_SYMBOL(acpi_register_ioapic); 701 702 int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base) 703 { 704 /* TBD */ 705 return -EINVAL; 706 } 707 708 EXPORT_SYMBOL(acpi_unregister_ioapic); 709 710 static int __init acpi_parse_sbf(struct acpi_table_header *table) 711 { 712 struct acpi_table_boot *sb; 713 714 sb = (struct acpi_table_boot *)table; 715 if (!sb) { 716 printk(KERN_WARNING PREFIX "Unable to map SBF\n"); 717 return -ENODEV; 718 } 719 720 sbf_port = sb->cmos_index; /* Save CMOS port */ 721 722 return 0; 723 } 724 725 #ifdef CONFIG_HPET_TIMER 726 #include <asm/hpet.h> 727 728 static struct __initdata resource *hpet_res; 729 730 static int __init acpi_parse_hpet(struct acpi_table_header *table) 731 { 732 struct acpi_table_hpet *hpet_tbl; 733 734 hpet_tbl = (struct acpi_table_hpet *)table; 735 if (!hpet_tbl) { 736 printk(KERN_WARNING PREFIX "Unable to map HPET\n"); 737 return -ENODEV; 738 } 739 740 if (hpet_tbl->address.space_id != ACPI_SPACE_MEM) { 741 printk(KERN_WARNING PREFIX "HPET timers must be located in " 742 "memory.\n"); 743 return -1; 744 } 745 746 hpet_address = hpet_tbl->address.address; 747 hpet_blockid = hpet_tbl->sequence; 748 749 /* 750 * Some broken BIOSes advertise HPET at 0x0. We really do not 751 * want to allocate a resource there. 752 */ 753 if (!hpet_address) { 754 printk(KERN_WARNING PREFIX 755 "HPET id: %#x base: %#lx is invalid\n", 756 hpet_tbl->id, hpet_address); 757 return 0; 758 } 759 #ifdef CONFIG_X86_64 760 /* 761 * Some even more broken BIOSes advertise HPET at 762 * 0xfed0000000000000 instead of 0xfed00000. Fix it up and add 763 * some noise: 764 */ 765 if (hpet_address == 0xfed0000000000000UL) { 766 if (!hpet_force_user) { 767 printk(KERN_WARNING PREFIX "HPET id: %#x " 768 "base: 0xfed0000000000000 is bogus\n " 769 "try hpet=force on the kernel command line to " 770 "fix it up to 0xfed00000.\n", hpet_tbl->id); 771 hpet_address = 0; 772 return 0; 773 } 774 printk(KERN_WARNING PREFIX 775 "HPET id: %#x base: 0xfed0000000000000 fixed up " 776 "to 0xfed00000.\n", hpet_tbl->id); 777 hpet_address >>= 32; 778 } 779 #endif 780 printk(KERN_INFO PREFIX "HPET id: %#x base: %#lx\n", 781 hpet_tbl->id, hpet_address); 782 783 /* 784 * Allocate and initialize the HPET firmware resource for adding into 785 * the resource tree during the lateinit timeframe. 786 */ 787 #define HPET_RESOURCE_NAME_SIZE 9 788 hpet_res = alloc_bootmem(sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE); 789 790 hpet_res->name = (void *)&hpet_res[1]; 791 hpet_res->flags = IORESOURCE_MEM; 792 snprintf((char *)hpet_res->name, HPET_RESOURCE_NAME_SIZE, "HPET %u", 793 hpet_tbl->sequence); 794 795 hpet_res->start = hpet_address; 796 hpet_res->end = hpet_address + (1 * 1024) - 1; 797 798 return 0; 799 } 800 801 /* 802 * hpet_insert_resource inserts the HPET resources used into the resource 803 * tree. 804 */ 805 static __init int hpet_insert_resource(void) 806 { 807 if (!hpet_res) 808 return 1; 809 810 return insert_resource(&iomem_resource, hpet_res); 811 } 812 813 late_initcall(hpet_insert_resource); 814 815 #else 816 #define acpi_parse_hpet NULL 817 #endif 818 819 static int __init acpi_parse_fadt(struct acpi_table_header *table) 820 { 821 822 #ifdef CONFIG_X86_PM_TIMER 823 /* detect the location of the ACPI PM Timer */ 824 if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID) { 825 /* FADT rev. 2 */ 826 if (acpi_gbl_FADT.xpm_timer_block.space_id != 827 ACPI_ADR_SPACE_SYSTEM_IO) 828 return 0; 829 830 pmtmr_ioport = acpi_gbl_FADT.xpm_timer_block.address; 831 /* 832 * "X" fields are optional extensions to the original V1.0 833 * fields, so we must selectively expand V1.0 fields if the 834 * corresponding X field is zero. 835 */ 836 if (!pmtmr_ioport) 837 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block; 838 } else { 839 /* FADT rev. 1 */ 840 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block; 841 } 842 if (pmtmr_ioport) 843 printk(KERN_INFO PREFIX "PM-Timer IO Port: %#x\n", 844 pmtmr_ioport); 845 #endif 846 return 0; 847 } 848 849 #ifdef CONFIG_X86_LOCAL_APIC 850 /* 851 * Parse LAPIC entries in MADT 852 * returns 0 on success, < 0 on error 853 */ 854 855 static void __init acpi_register_lapic_address(unsigned long address) 856 { 857 mp_lapic_addr = address; 858 859 set_fixmap_nocache(FIX_APIC_BASE, address); 860 if (boot_cpu_physical_apicid == -1U) { 861 boot_cpu_physical_apicid = read_apic_id(); 862 apic_version[boot_cpu_physical_apicid] = 863 GET_APIC_VERSION(apic_read(APIC_LVR)); 864 } 865 } 866 867 static int __init early_acpi_parse_madt_lapic_addr_ovr(void) 868 { 869 int count; 870 871 if (!cpu_has_apic) 872 return -ENODEV; 873 874 /* 875 * Note that the LAPIC address is obtained from the MADT (32-bit value) 876 * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value). 877 */ 878 879 count = 880 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE, 881 acpi_parse_lapic_addr_ovr, 0); 882 if (count < 0) { 883 printk(KERN_ERR PREFIX 884 "Error parsing LAPIC address override entry\n"); 885 return count; 886 } 887 888 acpi_register_lapic_address(acpi_lapic_addr); 889 890 return count; 891 } 892 893 static int __init acpi_parse_madt_lapic_entries(void) 894 { 895 int count; 896 int x2count = 0; 897 898 if (!cpu_has_apic) 899 return -ENODEV; 900 901 /* 902 * Note that the LAPIC address is obtained from the MADT (32-bit value) 903 * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value). 904 */ 905 906 count = 907 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE, 908 acpi_parse_lapic_addr_ovr, 0); 909 if (count < 0) { 910 printk(KERN_ERR PREFIX 911 "Error parsing LAPIC address override entry\n"); 912 return count; 913 } 914 915 acpi_register_lapic_address(acpi_lapic_addr); 916 917 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC, 918 acpi_parse_sapic, MAX_LOCAL_APIC); 919 920 if (!count) { 921 x2count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC, 922 acpi_parse_x2apic, MAX_LOCAL_APIC); 923 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC, 924 acpi_parse_lapic, MAX_LOCAL_APIC); 925 } 926 if (!count && !x2count) { 927 printk(KERN_ERR PREFIX "No LAPIC entries present\n"); 928 /* TBD: Cleanup to allow fallback to MPS */ 929 return -ENODEV; 930 } else if (count < 0 || x2count < 0) { 931 printk(KERN_ERR PREFIX "Error parsing LAPIC entry\n"); 932 /* TBD: Cleanup to allow fallback to MPS */ 933 return count; 934 } 935 936 x2count = 937 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC_NMI, 938 acpi_parse_x2apic_nmi, 0); 939 count = 940 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI, acpi_parse_lapic_nmi, 0); 941 if (count < 0 || x2count < 0) { 942 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n"); 943 /* TBD: Cleanup to allow fallback to MPS */ 944 return count; 945 } 946 return 0; 947 } 948 #endif /* CONFIG_X86_LOCAL_APIC */ 949 950 #ifdef CONFIG_X86_IO_APIC 951 #define MP_ISA_BUS 0 952 953 #ifdef CONFIG_X86_ES7000 954 extern int es7000_plat; 955 #endif 956 957 static void assign_to_mp_irq(struct mpc_intsrc *m, 958 struct mpc_intsrc *mp_irq) 959 { 960 memcpy(mp_irq, m, sizeof(struct mpc_intsrc)); 961 } 962 963 static int mp_irq_cmp(struct mpc_intsrc *mp_irq, 964 struct mpc_intsrc *m) 965 { 966 return memcmp(mp_irq, m, sizeof(struct mpc_intsrc)); 967 } 968 969 static void save_mp_irq(struct mpc_intsrc *m) 970 { 971 int i; 972 973 for (i = 0; i < mp_irq_entries; i++) { 974 if (!mp_irq_cmp(&mp_irqs[i], m)) 975 return; 976 } 977 978 assign_to_mp_irq(m, &mp_irqs[mp_irq_entries]); 979 if (++mp_irq_entries == MAX_IRQ_SOURCES) 980 panic("Max # of irq sources exceeded!!\n"); 981 } 982 983 void __init mp_override_legacy_irq(u8 bus_irq, u8 polarity, u8 trigger, u32 gsi) 984 { 985 int ioapic; 986 int pin; 987 struct mpc_intsrc mp_irq; 988 989 /* 990 * Convert 'gsi' to 'ioapic.pin'. 991 */ 992 ioapic = mp_find_ioapic(gsi); 993 if (ioapic < 0) 994 return; 995 pin = mp_find_ioapic_pin(ioapic, gsi); 996 997 /* 998 * TBD: This check is for faulty timer entries, where the override 999 * erroneously sets the trigger to level, resulting in a HUGE 1000 * increase of timer interrupts! 1001 */ 1002 if ((bus_irq == 0) && (trigger == 3)) 1003 trigger = 1; 1004 1005 mp_irq.type = MP_INTSRC; 1006 mp_irq.irqtype = mp_INT; 1007 mp_irq.irqflag = (trigger << 2) | polarity; 1008 mp_irq.srcbus = MP_ISA_BUS; 1009 mp_irq.srcbusirq = bus_irq; /* IRQ */ 1010 mp_irq.dstapic = mp_ioapics[ioapic].apicid; /* APIC ID */ 1011 mp_irq.dstirq = pin; /* INTIN# */ 1012 1013 save_mp_irq(&mp_irq); 1014 1015 isa_irq_to_gsi[bus_irq] = gsi; 1016 } 1017 1018 void __init mp_config_acpi_legacy_irqs(void) 1019 { 1020 int i; 1021 struct mpc_intsrc mp_irq; 1022 1023 #if defined (CONFIG_MCA) || defined (CONFIG_EISA) 1024 /* 1025 * Fabricate the legacy ISA bus (bus #31). 1026 */ 1027 mp_bus_id_to_type[MP_ISA_BUS] = MP_BUS_ISA; 1028 #endif 1029 set_bit(MP_ISA_BUS, mp_bus_not_pci); 1030 pr_debug("Bus #%d is ISA\n", MP_ISA_BUS); 1031 1032 #ifdef CONFIG_X86_ES7000 1033 /* 1034 * Older generations of ES7000 have no legacy identity mappings 1035 */ 1036 if (es7000_plat == 1) 1037 return; 1038 #endif 1039 1040 /* 1041 * Use the default configuration for the IRQs 0-15. Unless 1042 * overridden by (MADT) interrupt source override entries. 1043 */ 1044 for (i = 0; i < 16; i++) { 1045 int ioapic, pin; 1046 unsigned int dstapic; 1047 int idx; 1048 u32 gsi; 1049 1050 /* Locate the gsi that irq i maps to. */ 1051 if (acpi_isa_irq_to_gsi(i, &gsi)) 1052 continue; 1053 1054 /* 1055 * Locate the IOAPIC that manages the ISA IRQ. 1056 */ 1057 ioapic = mp_find_ioapic(gsi); 1058 if (ioapic < 0) 1059 continue; 1060 pin = mp_find_ioapic_pin(ioapic, gsi); 1061 dstapic = mp_ioapics[ioapic].apicid; 1062 1063 for (idx = 0; idx < mp_irq_entries; idx++) { 1064 struct mpc_intsrc *irq = mp_irqs + idx; 1065 1066 /* Do we already have a mapping for this ISA IRQ? */ 1067 if (irq->srcbus == MP_ISA_BUS && irq->srcbusirq == i) 1068 break; 1069 1070 /* Do we already have a mapping for this IOAPIC pin */ 1071 if (irq->dstapic == dstapic && irq->dstirq == pin) 1072 break; 1073 } 1074 1075 if (idx != mp_irq_entries) { 1076 printk(KERN_DEBUG "ACPI: IRQ%d used by override.\n", i); 1077 continue; /* IRQ already used */ 1078 } 1079 1080 mp_irq.type = MP_INTSRC; 1081 mp_irq.irqflag = 0; /* Conforming */ 1082 mp_irq.srcbus = MP_ISA_BUS; 1083 mp_irq.dstapic = dstapic; 1084 mp_irq.irqtype = mp_INT; 1085 mp_irq.srcbusirq = i; /* Identity mapped */ 1086 mp_irq.dstirq = pin; 1087 1088 save_mp_irq(&mp_irq); 1089 } 1090 } 1091 1092 static int mp_config_acpi_gsi(struct device *dev, u32 gsi, int trigger, 1093 int polarity) 1094 { 1095 #ifdef CONFIG_X86_MPPARSE 1096 struct mpc_intsrc mp_irq; 1097 struct pci_dev *pdev; 1098 unsigned char number; 1099 unsigned int devfn; 1100 int ioapic; 1101 u8 pin; 1102 1103 if (!acpi_ioapic) 1104 return 0; 1105 if (!dev) 1106 return 0; 1107 if (dev->bus != &pci_bus_type) 1108 return 0; 1109 1110 pdev = to_pci_dev(dev); 1111 number = pdev->bus->number; 1112 devfn = pdev->devfn; 1113 pin = pdev->pin; 1114 /* print the entry should happen on mptable identically */ 1115 mp_irq.type = MP_INTSRC; 1116 mp_irq.irqtype = mp_INT; 1117 mp_irq.irqflag = (trigger == ACPI_EDGE_SENSITIVE ? 4 : 0x0c) | 1118 (polarity == ACPI_ACTIVE_HIGH ? 1 : 3); 1119 mp_irq.srcbus = number; 1120 mp_irq.srcbusirq = (((devfn >> 3) & 0x1f) << 2) | ((pin - 1) & 3); 1121 ioapic = mp_find_ioapic(gsi); 1122 mp_irq.dstapic = mp_ioapics[ioapic].apicid; 1123 mp_irq.dstirq = mp_find_ioapic_pin(ioapic, gsi); 1124 1125 save_mp_irq(&mp_irq); 1126 #endif 1127 return 0; 1128 } 1129 1130 int mp_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity) 1131 { 1132 int ioapic; 1133 int ioapic_pin; 1134 struct io_apic_irq_attr irq_attr; 1135 1136 if (acpi_irq_model != ACPI_IRQ_MODEL_IOAPIC) 1137 return gsi; 1138 1139 /* Don't set up the ACPI SCI because it's already set up */ 1140 if (acpi_gbl_FADT.sci_interrupt == gsi) 1141 return gsi; 1142 1143 ioapic = mp_find_ioapic(gsi); 1144 if (ioapic < 0) { 1145 printk(KERN_WARNING "No IOAPIC for GSI %u\n", gsi); 1146 return gsi; 1147 } 1148 1149 ioapic_pin = mp_find_ioapic_pin(ioapic, gsi); 1150 1151 if (ioapic_pin > MP_MAX_IOAPIC_PIN) { 1152 printk(KERN_ERR "Invalid reference to IOAPIC pin " 1153 "%d-%d\n", mp_ioapics[ioapic].apicid, 1154 ioapic_pin); 1155 return gsi; 1156 } 1157 1158 if (enable_update_mptable) 1159 mp_config_acpi_gsi(dev, gsi, trigger, polarity); 1160 1161 set_io_apic_irq_attr(&irq_attr, ioapic, ioapic_pin, 1162 trigger == ACPI_EDGE_SENSITIVE ? 0 : 1, 1163 polarity == ACPI_ACTIVE_HIGH ? 0 : 1); 1164 io_apic_set_pci_routing(dev, gsi_to_irq(gsi), &irq_attr); 1165 1166 return gsi; 1167 } 1168 1169 /* 1170 * Parse IOAPIC related entries in MADT 1171 * returns 0 on success, < 0 on error 1172 */ 1173 static int __init acpi_parse_madt_ioapic_entries(void) 1174 { 1175 int count; 1176 1177 /* 1178 * ACPI interpreter is required to complete interrupt setup, 1179 * so if it is off, don't enumerate the io-apics with ACPI. 1180 * If MPS is present, it will handle them, 1181 * otherwise the system will stay in PIC mode 1182 */ 1183 if (acpi_disabled || acpi_noirq) 1184 return -ENODEV; 1185 1186 if (!cpu_has_apic) 1187 return -ENODEV; 1188 1189 /* 1190 * if "noapic" boot option, don't look for IO-APICs 1191 */ 1192 if (skip_ioapic_setup) { 1193 printk(KERN_INFO PREFIX "Skipping IOAPIC probe " 1194 "due to 'noapic' option.\n"); 1195 return -ENODEV; 1196 } 1197 1198 count = 1199 acpi_table_parse_madt(ACPI_MADT_TYPE_IO_APIC, acpi_parse_ioapic, 1200 MAX_IO_APICS); 1201 if (!count) { 1202 printk(KERN_ERR PREFIX "No IOAPIC entries present\n"); 1203 return -ENODEV; 1204 } else if (count < 0) { 1205 printk(KERN_ERR PREFIX "Error parsing IOAPIC entry\n"); 1206 return count; 1207 } 1208 1209 count = 1210 acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE, acpi_parse_int_src_ovr, 1211 nr_irqs); 1212 if (count < 0) { 1213 printk(KERN_ERR PREFIX 1214 "Error parsing interrupt source overrides entry\n"); 1215 /* TBD: Cleanup to allow fallback to MPS */ 1216 return count; 1217 } 1218 1219 /* 1220 * If BIOS did not supply an INT_SRC_OVR for the SCI 1221 * pretend we got one so we can set the SCI flags. 1222 */ 1223 if (!acpi_sci_override_gsi) 1224 acpi_sci_ioapic_setup(acpi_gbl_FADT.sci_interrupt, 0, 0, 1225 acpi_gbl_FADT.sci_interrupt); 1226 1227 /* Fill in identity legacy mappings where no override */ 1228 mp_config_acpi_legacy_irqs(); 1229 1230 count = 1231 acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE, acpi_parse_nmi_src, 1232 nr_irqs); 1233 if (count < 0) { 1234 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n"); 1235 /* TBD: Cleanup to allow fallback to MPS */ 1236 return count; 1237 } 1238 1239 return 0; 1240 } 1241 #else 1242 static inline int acpi_parse_madt_ioapic_entries(void) 1243 { 1244 return -1; 1245 } 1246 #endif /* !CONFIG_X86_IO_APIC */ 1247 1248 static void __init early_acpi_process_madt(void) 1249 { 1250 #ifdef CONFIG_X86_LOCAL_APIC 1251 int error; 1252 1253 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) { 1254 1255 /* 1256 * Parse MADT LAPIC entries 1257 */ 1258 error = early_acpi_parse_madt_lapic_addr_ovr(); 1259 if (!error) { 1260 acpi_lapic = 1; 1261 smp_found_config = 1; 1262 } 1263 if (error == -EINVAL) { 1264 /* 1265 * Dell Precision Workstation 410, 610 come here. 1266 */ 1267 printk(KERN_ERR PREFIX 1268 "Invalid BIOS MADT, disabling ACPI\n"); 1269 disable_acpi(); 1270 } 1271 } 1272 #endif 1273 } 1274 1275 static void __init acpi_process_madt(void) 1276 { 1277 #ifdef CONFIG_X86_LOCAL_APIC 1278 int error; 1279 1280 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) { 1281 1282 /* 1283 * Parse MADT LAPIC entries 1284 */ 1285 error = acpi_parse_madt_lapic_entries(); 1286 if (!error) { 1287 acpi_lapic = 1; 1288 1289 /* 1290 * Parse MADT IO-APIC entries 1291 */ 1292 error = acpi_parse_madt_ioapic_entries(); 1293 if (!error) { 1294 acpi_set_irq_model_ioapic(); 1295 1296 smp_found_config = 1; 1297 } 1298 } 1299 if (error == -EINVAL) { 1300 /* 1301 * Dell Precision Workstation 410, 610 come here. 1302 */ 1303 printk(KERN_ERR PREFIX 1304 "Invalid BIOS MADT, disabling ACPI\n"); 1305 disable_acpi(); 1306 } 1307 } else { 1308 /* 1309 * ACPI found no MADT, and so ACPI wants UP PIC mode. 1310 * In the event an MPS table was found, forget it. 1311 * Boot with "acpi=off" to use MPS on such a system. 1312 */ 1313 if (smp_found_config) { 1314 printk(KERN_WARNING PREFIX 1315 "No APIC-table, disabling MPS\n"); 1316 smp_found_config = 0; 1317 } 1318 } 1319 1320 /* 1321 * ACPI supports both logical (e.g. Hyper-Threading) and physical 1322 * processors, where MPS only supports physical. 1323 */ 1324 if (acpi_lapic && acpi_ioapic) 1325 printk(KERN_INFO "Using ACPI (MADT) for SMP configuration " 1326 "information\n"); 1327 else if (acpi_lapic) 1328 printk(KERN_INFO "Using ACPI for processor (LAPIC) " 1329 "configuration information\n"); 1330 #endif 1331 return; 1332 } 1333 1334 static int __init disable_acpi_irq(const struct dmi_system_id *d) 1335 { 1336 if (!acpi_force) { 1337 printk(KERN_NOTICE "%s detected: force use of acpi=noirq\n", 1338 d->ident); 1339 acpi_noirq_set(); 1340 } 1341 return 0; 1342 } 1343 1344 static int __init disable_acpi_pci(const struct dmi_system_id *d) 1345 { 1346 if (!acpi_force) { 1347 printk(KERN_NOTICE "%s detected: force use of pci=noacpi\n", 1348 d->ident); 1349 acpi_disable_pci(); 1350 } 1351 return 0; 1352 } 1353 1354 static int __init dmi_disable_acpi(const struct dmi_system_id *d) 1355 { 1356 if (!acpi_force) { 1357 printk(KERN_NOTICE "%s detected: acpi off\n", d->ident); 1358 disable_acpi(); 1359 } else { 1360 printk(KERN_NOTICE 1361 "Warning: DMI blacklist says broken, but acpi forced\n"); 1362 } 1363 return 0; 1364 } 1365 1366 /* 1367 * Force ignoring BIOS IRQ0 pin2 override 1368 */ 1369 static int __init dmi_ignore_irq0_timer_override(const struct dmi_system_id *d) 1370 { 1371 /* 1372 * The ati_ixp4x0_rev() early PCI quirk should have set 1373 * the acpi_skip_timer_override flag already: 1374 */ 1375 if (!acpi_skip_timer_override) { 1376 WARN(1, KERN_ERR "ati_ixp4x0 quirk not complete.\n"); 1377 pr_notice("%s detected: Ignoring BIOS IRQ0 pin2 override\n", 1378 d->ident); 1379 acpi_skip_timer_override = 1; 1380 } 1381 return 0; 1382 } 1383 1384 /* 1385 * If your system is blacklisted here, but you find that acpi=force 1386 * works for you, please contact linux-acpi@vger.kernel.org 1387 */ 1388 static struct dmi_system_id __initdata acpi_dmi_table[] = { 1389 /* 1390 * Boxes that need ACPI disabled 1391 */ 1392 { 1393 .callback = dmi_disable_acpi, 1394 .ident = "IBM Thinkpad", 1395 .matches = { 1396 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), 1397 DMI_MATCH(DMI_BOARD_NAME, "2629H1G"), 1398 }, 1399 }, 1400 1401 /* 1402 * Boxes that need ACPI PCI IRQ routing disabled 1403 */ 1404 { 1405 .callback = disable_acpi_irq, 1406 .ident = "ASUS A7V", 1407 .matches = { 1408 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC"), 1409 DMI_MATCH(DMI_BOARD_NAME, "<A7V>"), 1410 /* newer BIOS, Revision 1011, does work */ 1411 DMI_MATCH(DMI_BIOS_VERSION, 1412 "ASUS A7V ACPI BIOS Revision 1007"), 1413 }, 1414 }, 1415 { 1416 /* 1417 * Latest BIOS for IBM 600E (1.16) has bad pcinum 1418 * for LPC bridge, which is needed for the PCI 1419 * interrupt links to work. DSDT fix is in bug 5966. 1420 * 2645, 2646 model numbers are shared with 600/600E/600X 1421 */ 1422 .callback = disable_acpi_irq, 1423 .ident = "IBM Thinkpad 600 Series 2645", 1424 .matches = { 1425 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), 1426 DMI_MATCH(DMI_BOARD_NAME, "2645"), 1427 }, 1428 }, 1429 { 1430 .callback = disable_acpi_irq, 1431 .ident = "IBM Thinkpad 600 Series 2646", 1432 .matches = { 1433 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), 1434 DMI_MATCH(DMI_BOARD_NAME, "2646"), 1435 }, 1436 }, 1437 /* 1438 * Boxes that need ACPI PCI IRQ routing and PCI scan disabled 1439 */ 1440 { /* _BBN 0 bug */ 1441 .callback = disable_acpi_pci, 1442 .ident = "ASUS PR-DLS", 1443 .matches = { 1444 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."), 1445 DMI_MATCH(DMI_BOARD_NAME, "PR-DLS"), 1446 DMI_MATCH(DMI_BIOS_VERSION, 1447 "ASUS PR-DLS ACPI BIOS Revision 1010"), 1448 DMI_MATCH(DMI_BIOS_DATE, "03/21/2003") 1449 }, 1450 }, 1451 { 1452 .callback = disable_acpi_pci, 1453 .ident = "Acer TravelMate 36x Laptop", 1454 .matches = { 1455 DMI_MATCH(DMI_SYS_VENDOR, "Acer"), 1456 DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"), 1457 }, 1458 }, 1459 {} 1460 }; 1461 1462 /* second table for DMI checks that should run after early-quirks */ 1463 static struct dmi_system_id __initdata acpi_dmi_table_late[] = { 1464 /* 1465 * HP laptops which use a DSDT reporting as HP/SB400/10000, 1466 * which includes some code which overrides all temperature 1467 * trip points to 16C if the INTIN2 input of the I/O APIC 1468 * is enabled. This input is incorrectly designated the 1469 * ISA IRQ 0 via an interrupt source override even though 1470 * it is wired to the output of the master 8259A and INTIN0 1471 * is not connected at all. Force ignoring BIOS IRQ0 pin2 1472 * override in that cases. 1473 */ 1474 { 1475 .callback = dmi_ignore_irq0_timer_override, 1476 .ident = "HP nx6115 laptop", 1477 .matches = { 1478 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 1479 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6115"), 1480 }, 1481 }, 1482 { 1483 .callback = dmi_ignore_irq0_timer_override, 1484 .ident = "HP NX6125 laptop", 1485 .matches = { 1486 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 1487 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6125"), 1488 }, 1489 }, 1490 { 1491 .callback = dmi_ignore_irq0_timer_override, 1492 .ident = "HP NX6325 laptop", 1493 .matches = { 1494 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 1495 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6325"), 1496 }, 1497 }, 1498 { 1499 .callback = dmi_ignore_irq0_timer_override, 1500 .ident = "HP 6715b laptop", 1501 .matches = { 1502 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 1503 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq 6715b"), 1504 }, 1505 }, 1506 {} 1507 }; 1508 1509 /* 1510 * acpi_boot_table_init() and acpi_boot_init() 1511 * called from setup_arch(), always. 1512 * 1. checksums all tables 1513 * 2. enumerates lapics 1514 * 3. enumerates io-apics 1515 * 1516 * acpi_table_init() is separate to allow reading SRAT without 1517 * other side effects. 1518 * 1519 * side effects of acpi_boot_init: 1520 * acpi_lapic = 1 if LAPIC found 1521 * acpi_ioapic = 1 if IOAPIC found 1522 * if (acpi_lapic && acpi_ioapic) smp_found_config = 1; 1523 * if acpi_blacklisted() acpi_disabled = 1; 1524 * acpi_irq_model=... 1525 * ... 1526 */ 1527 1528 void __init acpi_boot_table_init(void) 1529 { 1530 dmi_check_system(acpi_dmi_table); 1531 1532 /* 1533 * If acpi_disabled, bail out 1534 */ 1535 if (acpi_disabled) 1536 return; 1537 1538 /* 1539 * Initialize the ACPI boot-time table parser. 1540 */ 1541 if (acpi_table_init()) { 1542 disable_acpi(); 1543 return; 1544 } 1545 1546 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf); 1547 1548 /* 1549 * blacklist may disable ACPI entirely 1550 */ 1551 if (acpi_blacklisted()) { 1552 if (acpi_force) { 1553 printk(KERN_WARNING PREFIX "acpi=force override\n"); 1554 } else { 1555 printk(KERN_WARNING PREFIX "Disabling ACPI support\n"); 1556 disable_acpi(); 1557 return; 1558 } 1559 } 1560 } 1561 1562 int __init early_acpi_boot_init(void) 1563 { 1564 /* 1565 * If acpi_disabled, bail out 1566 */ 1567 if (acpi_disabled) 1568 return 1; 1569 1570 /* 1571 * Process the Multiple APIC Description Table (MADT), if present 1572 */ 1573 early_acpi_process_madt(); 1574 1575 return 0; 1576 } 1577 1578 int __init acpi_boot_init(void) 1579 { 1580 /* those are executed after early-quirks are executed */ 1581 dmi_check_system(acpi_dmi_table_late); 1582 1583 /* 1584 * If acpi_disabled, bail out 1585 */ 1586 if (acpi_disabled) 1587 return 1; 1588 1589 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf); 1590 1591 /* 1592 * set sci_int and PM timer address 1593 */ 1594 acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt); 1595 1596 /* 1597 * Process the Multiple APIC Description Table (MADT), if present 1598 */ 1599 acpi_process_madt(); 1600 1601 acpi_table_parse(ACPI_SIG_HPET, acpi_parse_hpet); 1602 1603 if (!acpi_noirq) 1604 x86_init.pci.init = pci_acpi_init; 1605 1606 return 0; 1607 } 1608 1609 static int __init parse_acpi(char *arg) 1610 { 1611 if (!arg) 1612 return -EINVAL; 1613 1614 /* "acpi=off" disables both ACPI table parsing and interpreter */ 1615 if (strcmp(arg, "off") == 0) { 1616 disable_acpi(); 1617 } 1618 /* acpi=force to over-ride black-list */ 1619 else if (strcmp(arg, "force") == 0) { 1620 acpi_force = 1; 1621 acpi_disabled = 0; 1622 } 1623 /* acpi=strict disables out-of-spec workarounds */ 1624 else if (strcmp(arg, "strict") == 0) { 1625 acpi_strict = 1; 1626 } 1627 /* acpi=rsdt use RSDT instead of XSDT */ 1628 else if (strcmp(arg, "rsdt") == 0) { 1629 acpi_rsdt_forced = 1; 1630 } 1631 /* "acpi=noirq" disables ACPI interrupt routing */ 1632 else if (strcmp(arg, "noirq") == 0) { 1633 acpi_noirq_set(); 1634 } 1635 /* "acpi=copy_dsdt" copys DSDT */ 1636 else if (strcmp(arg, "copy_dsdt") == 0) { 1637 acpi_gbl_copy_dsdt_locally = 1; 1638 } else { 1639 /* Core will printk when we return error. */ 1640 return -EINVAL; 1641 } 1642 return 0; 1643 } 1644 early_param("acpi", parse_acpi); 1645 1646 /* FIXME: Using pci= for an ACPI parameter is a travesty. */ 1647 static int __init parse_pci(char *arg) 1648 { 1649 if (arg && strcmp(arg, "noacpi") == 0) 1650 acpi_disable_pci(); 1651 return 0; 1652 } 1653 early_param("pci", parse_pci); 1654 1655 int __init acpi_mps_check(void) 1656 { 1657 #if defined(CONFIG_X86_LOCAL_APIC) && !defined(CONFIG_X86_MPPARSE) 1658 /* mptable code is not built-in*/ 1659 if (acpi_disabled || acpi_noirq) { 1660 printk(KERN_WARNING "MPS support code is not built-in.\n" 1661 "Using acpi=off or acpi=noirq or pci=noacpi " 1662 "may have problem\n"); 1663 return 1; 1664 } 1665 #endif 1666 return 0; 1667 } 1668 1669 #ifdef CONFIG_X86_IO_APIC 1670 static int __init parse_acpi_skip_timer_override(char *arg) 1671 { 1672 acpi_skip_timer_override = 1; 1673 return 0; 1674 } 1675 early_param("acpi_skip_timer_override", parse_acpi_skip_timer_override); 1676 1677 static int __init parse_acpi_use_timer_override(char *arg) 1678 { 1679 acpi_use_timer_override = 1; 1680 return 0; 1681 } 1682 early_param("acpi_use_timer_override", parse_acpi_use_timer_override); 1683 #endif /* CONFIG_X86_IO_APIC */ 1684 1685 static int __init setup_acpi_sci(char *s) 1686 { 1687 if (!s) 1688 return -EINVAL; 1689 if (!strcmp(s, "edge")) 1690 acpi_sci_flags = ACPI_MADT_TRIGGER_EDGE | 1691 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK); 1692 else if (!strcmp(s, "level")) 1693 acpi_sci_flags = ACPI_MADT_TRIGGER_LEVEL | 1694 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK); 1695 else if (!strcmp(s, "high")) 1696 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_HIGH | 1697 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK); 1698 else if (!strcmp(s, "low")) 1699 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_LOW | 1700 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK); 1701 else 1702 return -EINVAL; 1703 return 0; 1704 } 1705 early_param("acpi_sci", setup_acpi_sci); 1706 1707 int __acpi_acquire_global_lock(unsigned int *lock) 1708 { 1709 unsigned int old, new, val; 1710 do { 1711 old = *lock; 1712 new = (((old & ~0x3) + 2) + ((old >> 1) & 0x1)); 1713 val = cmpxchg(lock, old, new); 1714 } while (unlikely (val != old)); 1715 return (new < 3) ? -1 : 0; 1716 } 1717 1718 int __acpi_release_global_lock(unsigned int *lock) 1719 { 1720 unsigned int old, new, val; 1721 do { 1722 old = *lock; 1723 new = old & ~0x3; 1724 val = cmpxchg(lock, old, new); 1725 } while (unlikely (val != old)); 1726 return old & 0x1; 1727 } 1728