1 /* 2 * boot.c - Architecture-Specific Low-Level ACPI Boot Support 3 * 4 * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com> 5 * Copyright (C) 2001 Jun Nakajima <jun.nakajima@intel.com> 6 * 7 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 8 * 9 * This program is free software; you can redistribute it and/or modify 10 * it under the terms of the GNU General Public License as published by 11 * the Free Software Foundation; either version 2 of the License, or 12 * (at your option) any later version. 13 * 14 * This program is distributed in the hope that it will be useful, 15 * but WITHOUT ANY WARRANTY; without even the implied warranty of 16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 17 * GNU General Public License for more details. 18 * 19 * You should have received a copy of the GNU General Public License 20 * along with this program; if not, write to the Free Software 21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 22 * 23 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 24 */ 25 26 #include <linux/init.h> 27 #include <linux/acpi.h> 28 #include <linux/acpi_pmtmr.h> 29 #include <linux/efi.h> 30 #include <linux/cpumask.h> 31 #include <linux/module.h> 32 #include <linux/dmi.h> 33 #include <linux/irq.h> 34 #include <linux/slab.h> 35 #include <linux/bootmem.h> 36 #include <linux/ioport.h> 37 #include <linux/pci.h> 38 39 #include <asm/pci_x86.h> 40 #include <asm/pgtable.h> 41 #include <asm/io_apic.h> 42 #include <asm/apic.h> 43 #include <asm/io.h> 44 #include <asm/mpspec.h> 45 #include <asm/smp.h> 46 47 static int __initdata acpi_force = 0; 48 u32 acpi_rsdt_forced; 49 int acpi_disabled; 50 EXPORT_SYMBOL(acpi_disabled); 51 52 #ifdef CONFIG_X86_64 53 # include <asm/proto.h> 54 # include <asm/numa_64.h> 55 #endif /* X86 */ 56 57 #define BAD_MADT_ENTRY(entry, end) ( \ 58 (!entry) || (unsigned long)entry + sizeof(*entry) > end || \ 59 ((struct acpi_subtable_header *)entry)->length < sizeof(*entry)) 60 61 #define PREFIX "ACPI: " 62 63 int acpi_noirq; /* skip ACPI IRQ initialization */ 64 int acpi_pci_disabled; /* skip ACPI PCI scan and IRQ initialization */ 65 EXPORT_SYMBOL(acpi_pci_disabled); 66 67 int acpi_lapic; 68 int acpi_ioapic; 69 int acpi_strict; 70 71 u8 acpi_sci_flags __initdata; 72 int acpi_sci_override_gsi __initdata; 73 int acpi_skip_timer_override __initdata; 74 int acpi_use_timer_override __initdata; 75 int acpi_fix_pin2_polarity __initdata; 76 77 #ifdef CONFIG_X86_LOCAL_APIC 78 static u64 acpi_lapic_addr __initdata = APIC_DEFAULT_PHYS_BASE; 79 #endif 80 81 #ifndef __HAVE_ARCH_CMPXCHG 82 #warning ACPI uses CMPXCHG, i486 and later hardware 83 #endif 84 85 /* -------------------------------------------------------------------------- 86 Boot-time Configuration 87 -------------------------------------------------------------------------- */ 88 89 /* 90 * The default interrupt routing model is PIC (8259). This gets 91 * overridden if IOAPICs are enumerated (below). 92 */ 93 enum acpi_irq_model_id acpi_irq_model = ACPI_IRQ_MODEL_PIC; 94 95 96 /* 97 * ISA irqs by default are the first 16 gsis but can be 98 * any gsi as specified by an interrupt source override. 99 */ 100 static u32 isa_irq_to_gsi[NR_IRQS_LEGACY] __read_mostly = { 101 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 102 }; 103 104 static unsigned int gsi_to_irq(unsigned int gsi) 105 { 106 unsigned int irq = gsi + NR_IRQS_LEGACY; 107 unsigned int i; 108 109 for (i = 0; i < NR_IRQS_LEGACY; i++) { 110 if (isa_irq_to_gsi[i] == gsi) { 111 return i; 112 } 113 } 114 115 /* Provide an identity mapping of gsi == irq 116 * except on truly weird platforms that have 117 * non isa irqs in the first 16 gsis. 118 */ 119 if (gsi >= NR_IRQS_LEGACY) 120 irq = gsi; 121 else 122 irq = gsi_top + gsi; 123 124 return irq; 125 } 126 127 static u32 irq_to_gsi(int irq) 128 { 129 unsigned int gsi; 130 131 if (irq < NR_IRQS_LEGACY) 132 gsi = isa_irq_to_gsi[irq]; 133 else if (irq < gsi_top) 134 gsi = irq; 135 else if (irq < (gsi_top + NR_IRQS_LEGACY)) 136 gsi = irq - gsi_top; 137 else 138 gsi = 0xffffffff; 139 140 return gsi; 141 } 142 143 /* 144 * Temporarily use the virtual area starting from FIX_IO_APIC_BASE_END, 145 * to map the target physical address. The problem is that set_fixmap() 146 * provides a single page, and it is possible that the page is not 147 * sufficient. 148 * By using this area, we can map up to MAX_IO_APICS pages temporarily, 149 * i.e. until the next __va_range() call. 150 * 151 * Important Safety Note: The fixed I/O APIC page numbers are *subtracted* 152 * from the fixed base. That's why we start at FIX_IO_APIC_BASE_END and 153 * count idx down while incrementing the phys address. 154 */ 155 char *__init __acpi_map_table(unsigned long phys, unsigned long size) 156 { 157 158 if (!phys || !size) 159 return NULL; 160 161 return early_ioremap(phys, size); 162 } 163 void __init __acpi_unmap_table(char *map, unsigned long size) 164 { 165 if (!map || !size) 166 return; 167 168 early_iounmap(map, size); 169 } 170 171 #ifdef CONFIG_X86_LOCAL_APIC 172 static int __init acpi_parse_madt(struct acpi_table_header *table) 173 { 174 struct acpi_table_madt *madt = NULL; 175 176 if (!cpu_has_apic) 177 return -EINVAL; 178 179 madt = (struct acpi_table_madt *)table; 180 if (!madt) { 181 printk(KERN_WARNING PREFIX "Unable to map MADT\n"); 182 return -ENODEV; 183 } 184 185 if (madt->address) { 186 acpi_lapic_addr = (u64) madt->address; 187 188 printk(KERN_DEBUG PREFIX "Local APIC address 0x%08x\n", 189 madt->address); 190 } 191 192 default_acpi_madt_oem_check(madt->header.oem_id, 193 madt->header.oem_table_id); 194 195 return 0; 196 } 197 198 static void __cpuinit acpi_register_lapic(int id, u8 enabled) 199 { 200 unsigned int ver = 0; 201 202 if (id >= (MAX_LOCAL_APIC-1)) { 203 printk(KERN_INFO PREFIX "skipped apicid that is too big\n"); 204 return; 205 } 206 207 if (!enabled) { 208 ++disabled_cpus; 209 return; 210 } 211 212 if (boot_cpu_physical_apicid != -1U) 213 ver = apic_version[boot_cpu_physical_apicid]; 214 215 generic_processor_info(id, ver); 216 } 217 218 static int __init 219 acpi_parse_x2apic(struct acpi_subtable_header *header, const unsigned long end) 220 { 221 struct acpi_madt_local_x2apic *processor = NULL; 222 int apic_id; 223 u8 enabled; 224 225 processor = (struct acpi_madt_local_x2apic *)header; 226 227 if (BAD_MADT_ENTRY(processor, end)) 228 return -EINVAL; 229 230 acpi_table_print_madt_entry(header); 231 232 apic_id = processor->local_apic_id; 233 enabled = processor->lapic_flags & ACPI_MADT_ENABLED; 234 #ifdef CONFIG_X86_X2APIC 235 /* 236 * We need to register disabled CPU as well to permit 237 * counting disabled CPUs. This allows us to size 238 * cpus_possible_map more accurately, to permit 239 * to not preallocating memory for all NR_CPUS 240 * when we use CPU hotplug. 241 */ 242 if (!apic->apic_id_valid(apic_id) && enabled) 243 printk(KERN_WARNING PREFIX "x2apic entry ignored\n"); 244 else 245 acpi_register_lapic(apic_id, enabled); 246 #else 247 printk(KERN_WARNING PREFIX "x2apic entry ignored\n"); 248 #endif 249 250 return 0; 251 } 252 253 static int __init 254 acpi_parse_lapic(struct acpi_subtable_header * header, const unsigned long end) 255 { 256 struct acpi_madt_local_apic *processor = NULL; 257 258 processor = (struct acpi_madt_local_apic *)header; 259 260 if (BAD_MADT_ENTRY(processor, end)) 261 return -EINVAL; 262 263 acpi_table_print_madt_entry(header); 264 265 /* 266 * We need to register disabled CPU as well to permit 267 * counting disabled CPUs. This allows us to size 268 * cpus_possible_map more accurately, to permit 269 * to not preallocating memory for all NR_CPUS 270 * when we use CPU hotplug. 271 */ 272 acpi_register_lapic(processor->id, /* APIC ID */ 273 processor->lapic_flags & ACPI_MADT_ENABLED); 274 275 return 0; 276 } 277 278 static int __init 279 acpi_parse_sapic(struct acpi_subtable_header *header, const unsigned long end) 280 { 281 struct acpi_madt_local_sapic *processor = NULL; 282 283 processor = (struct acpi_madt_local_sapic *)header; 284 285 if (BAD_MADT_ENTRY(processor, end)) 286 return -EINVAL; 287 288 acpi_table_print_madt_entry(header); 289 290 acpi_register_lapic((processor->id << 8) | processor->eid,/* APIC ID */ 291 processor->lapic_flags & ACPI_MADT_ENABLED); 292 293 return 0; 294 } 295 296 static int __init 297 acpi_parse_lapic_addr_ovr(struct acpi_subtable_header * header, 298 const unsigned long end) 299 { 300 struct acpi_madt_local_apic_override *lapic_addr_ovr = NULL; 301 302 lapic_addr_ovr = (struct acpi_madt_local_apic_override *)header; 303 304 if (BAD_MADT_ENTRY(lapic_addr_ovr, end)) 305 return -EINVAL; 306 307 acpi_lapic_addr = lapic_addr_ovr->address; 308 309 return 0; 310 } 311 312 static int __init 313 acpi_parse_x2apic_nmi(struct acpi_subtable_header *header, 314 const unsigned long end) 315 { 316 struct acpi_madt_local_x2apic_nmi *x2apic_nmi = NULL; 317 318 x2apic_nmi = (struct acpi_madt_local_x2apic_nmi *)header; 319 320 if (BAD_MADT_ENTRY(x2apic_nmi, end)) 321 return -EINVAL; 322 323 acpi_table_print_madt_entry(header); 324 325 if (x2apic_nmi->lint != 1) 326 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n"); 327 328 return 0; 329 } 330 331 static int __init 332 acpi_parse_lapic_nmi(struct acpi_subtable_header * header, const unsigned long end) 333 { 334 struct acpi_madt_local_apic_nmi *lapic_nmi = NULL; 335 336 lapic_nmi = (struct acpi_madt_local_apic_nmi *)header; 337 338 if (BAD_MADT_ENTRY(lapic_nmi, end)) 339 return -EINVAL; 340 341 acpi_table_print_madt_entry(header); 342 343 if (lapic_nmi->lint != 1) 344 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n"); 345 346 return 0; 347 } 348 349 #endif /*CONFIG_X86_LOCAL_APIC */ 350 351 #ifdef CONFIG_X86_IO_APIC 352 353 static int __init 354 acpi_parse_ioapic(struct acpi_subtable_header * header, const unsigned long end) 355 { 356 struct acpi_madt_io_apic *ioapic = NULL; 357 358 ioapic = (struct acpi_madt_io_apic *)header; 359 360 if (BAD_MADT_ENTRY(ioapic, end)) 361 return -EINVAL; 362 363 acpi_table_print_madt_entry(header); 364 365 mp_register_ioapic(ioapic->id, 366 ioapic->address, ioapic->global_irq_base); 367 368 return 0; 369 } 370 371 /* 372 * Parse Interrupt Source Override for the ACPI SCI 373 */ 374 static void __init acpi_sci_ioapic_setup(u8 bus_irq, u16 polarity, u16 trigger, u32 gsi) 375 { 376 if (trigger == 0) /* compatible SCI trigger is level */ 377 trigger = 3; 378 379 if (polarity == 0) /* compatible SCI polarity is low */ 380 polarity = 3; 381 382 /* Command-line over-ride via acpi_sci= */ 383 if (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) 384 trigger = (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2; 385 386 if (acpi_sci_flags & ACPI_MADT_POLARITY_MASK) 387 polarity = acpi_sci_flags & ACPI_MADT_POLARITY_MASK; 388 389 /* 390 * mp_config_acpi_legacy_irqs() already setup IRQs < 16 391 * If GSI is < 16, this will update its flags, 392 * else it will create a new mp_irqs[] entry. 393 */ 394 mp_override_legacy_irq(bus_irq, polarity, trigger, gsi); 395 396 /* 397 * stash over-ride to indicate we've been here 398 * and for later update of acpi_gbl_FADT 399 */ 400 acpi_sci_override_gsi = gsi; 401 return; 402 } 403 404 static int __init 405 acpi_parse_int_src_ovr(struct acpi_subtable_header * header, 406 const unsigned long end) 407 { 408 struct acpi_madt_interrupt_override *intsrc = NULL; 409 410 intsrc = (struct acpi_madt_interrupt_override *)header; 411 412 if (BAD_MADT_ENTRY(intsrc, end)) 413 return -EINVAL; 414 415 acpi_table_print_madt_entry(header); 416 417 if (intsrc->source_irq == acpi_gbl_FADT.sci_interrupt) { 418 acpi_sci_ioapic_setup(intsrc->source_irq, 419 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK, 420 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2, 421 intsrc->global_irq); 422 return 0; 423 } 424 425 if (intsrc->source_irq == 0) { 426 if (acpi_skip_timer_override) { 427 printk(PREFIX "BIOS IRQ0 override ignored.\n"); 428 return 0; 429 } 430 431 if ((intsrc->global_irq == 2) && acpi_fix_pin2_polarity 432 && (intsrc->inti_flags & ACPI_MADT_POLARITY_MASK)) { 433 intsrc->inti_flags &= ~ACPI_MADT_POLARITY_MASK; 434 printk(PREFIX "BIOS IRQ0 pin2 override: forcing polarity to high active.\n"); 435 } 436 } 437 438 mp_override_legacy_irq(intsrc->source_irq, 439 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK, 440 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2, 441 intsrc->global_irq); 442 443 return 0; 444 } 445 446 static int __init 447 acpi_parse_nmi_src(struct acpi_subtable_header * header, const unsigned long end) 448 { 449 struct acpi_madt_nmi_source *nmi_src = NULL; 450 451 nmi_src = (struct acpi_madt_nmi_source *)header; 452 453 if (BAD_MADT_ENTRY(nmi_src, end)) 454 return -EINVAL; 455 456 acpi_table_print_madt_entry(header); 457 458 /* TBD: Support nimsrc entries? */ 459 460 return 0; 461 } 462 463 #endif /* CONFIG_X86_IO_APIC */ 464 465 /* 466 * acpi_pic_sci_set_trigger() 467 * 468 * use ELCR to set PIC-mode trigger type for SCI 469 * 470 * If a PIC-mode SCI is not recognized or gives spurious IRQ7's 471 * it may require Edge Trigger -- use "acpi_sci=edge" 472 * 473 * Port 0x4d0-4d1 are ECLR1 and ECLR2, the Edge/Level Control Registers 474 * for the 8259 PIC. bit[n] = 1 means irq[n] is Level, otherwise Edge. 475 * ECLR1 is IRQs 0-7 (IRQ 0, 1, 2 must be 0) 476 * ECLR2 is IRQs 8-15 (IRQ 8, 13 must be 0) 477 */ 478 479 void __init acpi_pic_sci_set_trigger(unsigned int irq, u16 trigger) 480 { 481 unsigned int mask = 1 << irq; 482 unsigned int old, new; 483 484 /* Real old ELCR mask */ 485 old = inb(0x4d0) | (inb(0x4d1) << 8); 486 487 /* 488 * If we use ACPI to set PCI IRQs, then we should clear ELCR 489 * since we will set it correctly as we enable the PCI irq 490 * routing. 491 */ 492 new = acpi_noirq ? old : 0; 493 494 /* 495 * Update SCI information in the ELCR, it isn't in the PCI 496 * routing tables.. 497 */ 498 switch (trigger) { 499 case 1: /* Edge - clear */ 500 new &= ~mask; 501 break; 502 case 3: /* Level - set */ 503 new |= mask; 504 break; 505 } 506 507 if (old == new) 508 return; 509 510 printk(PREFIX "setting ELCR to %04x (from %04x)\n", new, old); 511 outb(new, 0x4d0); 512 outb(new >> 8, 0x4d1); 513 } 514 515 int acpi_gsi_to_irq(u32 gsi, unsigned int *irq) 516 { 517 *irq = gsi_to_irq(gsi); 518 519 #ifdef CONFIG_X86_IO_APIC 520 if (acpi_irq_model == ACPI_IRQ_MODEL_IOAPIC) 521 setup_IO_APIC_irq_extra(gsi); 522 #endif 523 524 return 0; 525 } 526 EXPORT_SYMBOL_GPL(acpi_gsi_to_irq); 527 528 int acpi_isa_irq_to_gsi(unsigned isa_irq, u32 *gsi) 529 { 530 if (isa_irq >= 16) 531 return -1; 532 *gsi = irq_to_gsi(isa_irq); 533 return 0; 534 } 535 536 static int acpi_register_gsi_pic(struct device *dev, u32 gsi, 537 int trigger, int polarity) 538 { 539 #ifdef CONFIG_PCI 540 /* 541 * Make sure all (legacy) PCI IRQs are set as level-triggered. 542 */ 543 if (trigger == ACPI_LEVEL_SENSITIVE) 544 eisa_set_level_irq(gsi); 545 #endif 546 547 return gsi; 548 } 549 550 static int acpi_register_gsi_ioapic(struct device *dev, u32 gsi, 551 int trigger, int polarity) 552 { 553 #ifdef CONFIG_X86_IO_APIC 554 gsi = mp_register_gsi(dev, gsi, trigger, polarity); 555 #endif 556 557 return gsi; 558 } 559 560 int (*__acpi_register_gsi)(struct device *dev, u32 gsi, 561 int trigger, int polarity) = acpi_register_gsi_pic; 562 563 /* 564 * success: return IRQ number (>=0) 565 * failure: return < 0 566 */ 567 int acpi_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity) 568 { 569 unsigned int irq; 570 unsigned int plat_gsi = gsi; 571 572 plat_gsi = (*__acpi_register_gsi)(dev, gsi, trigger, polarity); 573 irq = gsi_to_irq(plat_gsi); 574 575 return irq; 576 } 577 EXPORT_SYMBOL_GPL(acpi_register_gsi); 578 579 void acpi_unregister_gsi(u32 gsi) 580 { 581 } 582 EXPORT_SYMBOL_GPL(acpi_unregister_gsi); 583 584 void __init acpi_set_irq_model_pic(void) 585 { 586 acpi_irq_model = ACPI_IRQ_MODEL_PIC; 587 __acpi_register_gsi = acpi_register_gsi_pic; 588 acpi_ioapic = 0; 589 } 590 591 void __init acpi_set_irq_model_ioapic(void) 592 { 593 acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC; 594 __acpi_register_gsi = acpi_register_gsi_ioapic; 595 acpi_ioapic = 1; 596 } 597 598 /* 599 * ACPI based hotplug support for CPU 600 */ 601 #ifdef CONFIG_ACPI_HOTPLUG_CPU 602 #include <acpi/processor.h> 603 604 static void __cpuinit acpi_map_cpu2node(acpi_handle handle, int cpu, int physid) 605 { 606 #ifdef CONFIG_ACPI_NUMA 607 int nid; 608 609 nid = acpi_get_node(handle); 610 if (nid == -1 || !node_online(nid)) 611 return; 612 set_apicid_to_node(physid, nid); 613 numa_set_node(cpu, nid); 614 #endif 615 } 616 617 static int __cpuinit _acpi_map_lsapic(acpi_handle handle, int *pcpu) 618 { 619 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; 620 union acpi_object *obj; 621 struct acpi_madt_local_apic *lapic; 622 cpumask_var_t tmp_map, new_map; 623 u8 physid; 624 int cpu; 625 int retval = -ENOMEM; 626 627 if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer))) 628 return -EINVAL; 629 630 if (!buffer.length || !buffer.pointer) 631 return -EINVAL; 632 633 obj = buffer.pointer; 634 if (obj->type != ACPI_TYPE_BUFFER || 635 obj->buffer.length < sizeof(*lapic)) { 636 kfree(buffer.pointer); 637 return -EINVAL; 638 } 639 640 lapic = (struct acpi_madt_local_apic *)obj->buffer.pointer; 641 642 if (lapic->header.type != ACPI_MADT_TYPE_LOCAL_APIC || 643 !(lapic->lapic_flags & ACPI_MADT_ENABLED)) { 644 kfree(buffer.pointer); 645 return -EINVAL; 646 } 647 648 physid = lapic->id; 649 650 kfree(buffer.pointer); 651 buffer.length = ACPI_ALLOCATE_BUFFER; 652 buffer.pointer = NULL; 653 lapic = NULL; 654 655 if (!alloc_cpumask_var(&tmp_map, GFP_KERNEL)) 656 goto out; 657 658 if (!alloc_cpumask_var(&new_map, GFP_KERNEL)) 659 goto free_tmp_map; 660 661 cpumask_copy(tmp_map, cpu_present_mask); 662 acpi_register_lapic(physid, ACPI_MADT_ENABLED); 663 664 /* 665 * If acpi_register_lapic successfully generates a new logical cpu 666 * number, then the following will get us exactly what was mapped 667 */ 668 cpumask_andnot(new_map, cpu_present_mask, tmp_map); 669 if (cpumask_empty(new_map)) { 670 printk ("Unable to map lapic to logical cpu number\n"); 671 retval = -EINVAL; 672 goto free_new_map; 673 } 674 675 acpi_processor_set_pdc(handle); 676 677 cpu = cpumask_first(new_map); 678 acpi_map_cpu2node(handle, cpu, physid); 679 680 *pcpu = cpu; 681 retval = 0; 682 683 free_new_map: 684 free_cpumask_var(new_map); 685 free_tmp_map: 686 free_cpumask_var(tmp_map); 687 out: 688 return retval; 689 } 690 691 /* wrapper to silence section mismatch warning */ 692 int __ref acpi_map_lsapic(acpi_handle handle, int *pcpu) 693 { 694 return _acpi_map_lsapic(handle, pcpu); 695 } 696 EXPORT_SYMBOL(acpi_map_lsapic); 697 698 int acpi_unmap_lsapic(int cpu) 699 { 700 per_cpu(x86_cpu_to_apicid, cpu) = -1; 701 set_cpu_present(cpu, false); 702 num_processors--; 703 704 return (0); 705 } 706 707 EXPORT_SYMBOL(acpi_unmap_lsapic); 708 #endif /* CONFIG_ACPI_HOTPLUG_CPU */ 709 710 int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base) 711 { 712 /* TBD */ 713 return -EINVAL; 714 } 715 716 EXPORT_SYMBOL(acpi_register_ioapic); 717 718 int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base) 719 { 720 /* TBD */ 721 return -EINVAL; 722 } 723 724 EXPORT_SYMBOL(acpi_unregister_ioapic); 725 726 static int __init acpi_parse_sbf(struct acpi_table_header *table) 727 { 728 struct acpi_table_boot *sb; 729 730 sb = (struct acpi_table_boot *)table; 731 if (!sb) { 732 printk(KERN_WARNING PREFIX "Unable to map SBF\n"); 733 return -ENODEV; 734 } 735 736 sbf_port = sb->cmos_index; /* Save CMOS port */ 737 738 return 0; 739 } 740 741 #ifdef CONFIG_HPET_TIMER 742 #include <asm/hpet.h> 743 744 static struct __initdata resource *hpet_res; 745 746 static int __init acpi_parse_hpet(struct acpi_table_header *table) 747 { 748 struct acpi_table_hpet *hpet_tbl; 749 750 hpet_tbl = (struct acpi_table_hpet *)table; 751 if (!hpet_tbl) { 752 printk(KERN_WARNING PREFIX "Unable to map HPET\n"); 753 return -ENODEV; 754 } 755 756 if (hpet_tbl->address.space_id != ACPI_SPACE_MEM) { 757 printk(KERN_WARNING PREFIX "HPET timers must be located in " 758 "memory.\n"); 759 return -1; 760 } 761 762 hpet_address = hpet_tbl->address.address; 763 hpet_blockid = hpet_tbl->sequence; 764 765 /* 766 * Some broken BIOSes advertise HPET at 0x0. We really do not 767 * want to allocate a resource there. 768 */ 769 if (!hpet_address) { 770 printk(KERN_WARNING PREFIX 771 "HPET id: %#x base: %#lx is invalid\n", 772 hpet_tbl->id, hpet_address); 773 return 0; 774 } 775 #ifdef CONFIG_X86_64 776 /* 777 * Some even more broken BIOSes advertise HPET at 778 * 0xfed0000000000000 instead of 0xfed00000. Fix it up and add 779 * some noise: 780 */ 781 if (hpet_address == 0xfed0000000000000UL) { 782 if (!hpet_force_user) { 783 printk(KERN_WARNING PREFIX "HPET id: %#x " 784 "base: 0xfed0000000000000 is bogus\n " 785 "try hpet=force on the kernel command line to " 786 "fix it up to 0xfed00000.\n", hpet_tbl->id); 787 hpet_address = 0; 788 return 0; 789 } 790 printk(KERN_WARNING PREFIX 791 "HPET id: %#x base: 0xfed0000000000000 fixed up " 792 "to 0xfed00000.\n", hpet_tbl->id); 793 hpet_address >>= 32; 794 } 795 #endif 796 printk(KERN_INFO PREFIX "HPET id: %#x base: %#lx\n", 797 hpet_tbl->id, hpet_address); 798 799 /* 800 * Allocate and initialize the HPET firmware resource for adding into 801 * the resource tree during the lateinit timeframe. 802 */ 803 #define HPET_RESOURCE_NAME_SIZE 9 804 hpet_res = alloc_bootmem(sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE); 805 806 hpet_res->name = (void *)&hpet_res[1]; 807 hpet_res->flags = IORESOURCE_MEM; 808 snprintf((char *)hpet_res->name, HPET_RESOURCE_NAME_SIZE, "HPET %u", 809 hpet_tbl->sequence); 810 811 hpet_res->start = hpet_address; 812 hpet_res->end = hpet_address + (1 * 1024) - 1; 813 814 return 0; 815 } 816 817 /* 818 * hpet_insert_resource inserts the HPET resources used into the resource 819 * tree. 820 */ 821 static __init int hpet_insert_resource(void) 822 { 823 if (!hpet_res) 824 return 1; 825 826 return insert_resource(&iomem_resource, hpet_res); 827 } 828 829 late_initcall(hpet_insert_resource); 830 831 #else 832 #define acpi_parse_hpet NULL 833 #endif 834 835 static int __init acpi_parse_fadt(struct acpi_table_header *table) 836 { 837 838 #ifdef CONFIG_X86_PM_TIMER 839 /* detect the location of the ACPI PM Timer */ 840 if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID) { 841 /* FADT rev. 2 */ 842 if (acpi_gbl_FADT.xpm_timer_block.space_id != 843 ACPI_ADR_SPACE_SYSTEM_IO) 844 return 0; 845 846 pmtmr_ioport = acpi_gbl_FADT.xpm_timer_block.address; 847 /* 848 * "X" fields are optional extensions to the original V1.0 849 * fields, so we must selectively expand V1.0 fields if the 850 * corresponding X field is zero. 851 */ 852 if (!pmtmr_ioport) 853 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block; 854 } else { 855 /* FADT rev. 1 */ 856 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block; 857 } 858 if (pmtmr_ioport) 859 printk(KERN_INFO PREFIX "PM-Timer IO Port: %#x\n", 860 pmtmr_ioport); 861 #endif 862 return 0; 863 } 864 865 #ifdef CONFIG_X86_LOCAL_APIC 866 /* 867 * Parse LAPIC entries in MADT 868 * returns 0 on success, < 0 on error 869 */ 870 871 static int __init early_acpi_parse_madt_lapic_addr_ovr(void) 872 { 873 int count; 874 875 if (!cpu_has_apic) 876 return -ENODEV; 877 878 /* 879 * Note that the LAPIC address is obtained from the MADT (32-bit value) 880 * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value). 881 */ 882 883 count = 884 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE, 885 acpi_parse_lapic_addr_ovr, 0); 886 if (count < 0) { 887 printk(KERN_ERR PREFIX 888 "Error parsing LAPIC address override entry\n"); 889 return count; 890 } 891 892 register_lapic_address(acpi_lapic_addr); 893 894 return count; 895 } 896 897 static int __init acpi_parse_madt_lapic_entries(void) 898 { 899 int count; 900 int x2count = 0; 901 902 if (!cpu_has_apic) 903 return -ENODEV; 904 905 /* 906 * Note that the LAPIC address is obtained from the MADT (32-bit value) 907 * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value). 908 */ 909 910 count = 911 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE, 912 acpi_parse_lapic_addr_ovr, 0); 913 if (count < 0) { 914 printk(KERN_ERR PREFIX 915 "Error parsing LAPIC address override entry\n"); 916 return count; 917 } 918 919 register_lapic_address(acpi_lapic_addr); 920 921 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC, 922 acpi_parse_sapic, MAX_LOCAL_APIC); 923 924 if (!count) { 925 x2count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC, 926 acpi_parse_x2apic, MAX_LOCAL_APIC); 927 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC, 928 acpi_parse_lapic, MAX_LOCAL_APIC); 929 } 930 if (!count && !x2count) { 931 printk(KERN_ERR PREFIX "No LAPIC entries present\n"); 932 /* TBD: Cleanup to allow fallback to MPS */ 933 return -ENODEV; 934 } else if (count < 0 || x2count < 0) { 935 printk(KERN_ERR PREFIX "Error parsing LAPIC entry\n"); 936 /* TBD: Cleanup to allow fallback to MPS */ 937 return count; 938 } 939 940 x2count = 941 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC_NMI, 942 acpi_parse_x2apic_nmi, 0); 943 count = 944 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI, acpi_parse_lapic_nmi, 0); 945 if (count < 0 || x2count < 0) { 946 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n"); 947 /* TBD: Cleanup to allow fallback to MPS */ 948 return count; 949 } 950 return 0; 951 } 952 #endif /* CONFIG_X86_LOCAL_APIC */ 953 954 #ifdef CONFIG_X86_IO_APIC 955 #define MP_ISA_BUS 0 956 957 #ifdef CONFIG_X86_ES7000 958 extern int es7000_plat; 959 #endif 960 961 void __init mp_override_legacy_irq(u8 bus_irq, u8 polarity, u8 trigger, u32 gsi) 962 { 963 int ioapic; 964 int pin; 965 struct mpc_intsrc mp_irq; 966 967 /* 968 * Convert 'gsi' to 'ioapic.pin'. 969 */ 970 ioapic = mp_find_ioapic(gsi); 971 if (ioapic < 0) 972 return; 973 pin = mp_find_ioapic_pin(ioapic, gsi); 974 975 /* 976 * TBD: This check is for faulty timer entries, where the override 977 * erroneously sets the trigger to level, resulting in a HUGE 978 * increase of timer interrupts! 979 */ 980 if ((bus_irq == 0) && (trigger == 3)) 981 trigger = 1; 982 983 mp_irq.type = MP_INTSRC; 984 mp_irq.irqtype = mp_INT; 985 mp_irq.irqflag = (trigger << 2) | polarity; 986 mp_irq.srcbus = MP_ISA_BUS; 987 mp_irq.srcbusirq = bus_irq; /* IRQ */ 988 mp_irq.dstapic = mpc_ioapic_id(ioapic); /* APIC ID */ 989 mp_irq.dstirq = pin; /* INTIN# */ 990 991 mp_save_irq(&mp_irq); 992 993 isa_irq_to_gsi[bus_irq] = gsi; 994 } 995 996 void __init mp_config_acpi_legacy_irqs(void) 997 { 998 int i; 999 struct mpc_intsrc mp_irq; 1000 1001 #ifdef CONFIG_EISA 1002 /* 1003 * Fabricate the legacy ISA bus (bus #31). 1004 */ 1005 mp_bus_id_to_type[MP_ISA_BUS] = MP_BUS_ISA; 1006 #endif 1007 set_bit(MP_ISA_BUS, mp_bus_not_pci); 1008 pr_debug("Bus #%d is ISA\n", MP_ISA_BUS); 1009 1010 #ifdef CONFIG_X86_ES7000 1011 /* 1012 * Older generations of ES7000 have no legacy identity mappings 1013 */ 1014 if (es7000_plat == 1) 1015 return; 1016 #endif 1017 1018 /* 1019 * Use the default configuration for the IRQs 0-15. Unless 1020 * overridden by (MADT) interrupt source override entries. 1021 */ 1022 for (i = 0; i < 16; i++) { 1023 int ioapic, pin; 1024 unsigned int dstapic; 1025 int idx; 1026 u32 gsi; 1027 1028 /* Locate the gsi that irq i maps to. */ 1029 if (acpi_isa_irq_to_gsi(i, &gsi)) 1030 continue; 1031 1032 /* 1033 * Locate the IOAPIC that manages the ISA IRQ. 1034 */ 1035 ioapic = mp_find_ioapic(gsi); 1036 if (ioapic < 0) 1037 continue; 1038 pin = mp_find_ioapic_pin(ioapic, gsi); 1039 dstapic = mpc_ioapic_id(ioapic); 1040 1041 for (idx = 0; idx < mp_irq_entries; idx++) { 1042 struct mpc_intsrc *irq = mp_irqs + idx; 1043 1044 /* Do we already have a mapping for this ISA IRQ? */ 1045 if (irq->srcbus == MP_ISA_BUS && irq->srcbusirq == i) 1046 break; 1047 1048 /* Do we already have a mapping for this IOAPIC pin */ 1049 if (irq->dstapic == dstapic && irq->dstirq == pin) 1050 break; 1051 } 1052 1053 if (idx != mp_irq_entries) { 1054 printk(KERN_DEBUG "ACPI: IRQ%d used by override.\n", i); 1055 continue; /* IRQ already used */ 1056 } 1057 1058 mp_irq.type = MP_INTSRC; 1059 mp_irq.irqflag = 0; /* Conforming */ 1060 mp_irq.srcbus = MP_ISA_BUS; 1061 mp_irq.dstapic = dstapic; 1062 mp_irq.irqtype = mp_INT; 1063 mp_irq.srcbusirq = i; /* Identity mapped */ 1064 mp_irq.dstirq = pin; 1065 1066 mp_save_irq(&mp_irq); 1067 } 1068 } 1069 1070 static int mp_config_acpi_gsi(struct device *dev, u32 gsi, int trigger, 1071 int polarity) 1072 { 1073 #ifdef CONFIG_X86_MPPARSE 1074 struct mpc_intsrc mp_irq; 1075 struct pci_dev *pdev; 1076 unsigned char number; 1077 unsigned int devfn; 1078 int ioapic; 1079 u8 pin; 1080 1081 if (!acpi_ioapic) 1082 return 0; 1083 if (!dev) 1084 return 0; 1085 if (dev->bus != &pci_bus_type) 1086 return 0; 1087 1088 pdev = to_pci_dev(dev); 1089 number = pdev->bus->number; 1090 devfn = pdev->devfn; 1091 pin = pdev->pin; 1092 /* print the entry should happen on mptable identically */ 1093 mp_irq.type = MP_INTSRC; 1094 mp_irq.irqtype = mp_INT; 1095 mp_irq.irqflag = (trigger == ACPI_EDGE_SENSITIVE ? 4 : 0x0c) | 1096 (polarity == ACPI_ACTIVE_HIGH ? 1 : 3); 1097 mp_irq.srcbus = number; 1098 mp_irq.srcbusirq = (((devfn >> 3) & 0x1f) << 2) | ((pin - 1) & 3); 1099 ioapic = mp_find_ioapic(gsi); 1100 mp_irq.dstapic = mpc_ioapic_id(ioapic); 1101 mp_irq.dstirq = mp_find_ioapic_pin(ioapic, gsi); 1102 1103 mp_save_irq(&mp_irq); 1104 #endif 1105 return 0; 1106 } 1107 1108 int mp_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity) 1109 { 1110 int ioapic; 1111 int ioapic_pin; 1112 struct io_apic_irq_attr irq_attr; 1113 1114 if (acpi_irq_model != ACPI_IRQ_MODEL_IOAPIC) 1115 return gsi; 1116 1117 /* Don't set up the ACPI SCI because it's already set up */ 1118 if (acpi_gbl_FADT.sci_interrupt == gsi) 1119 return gsi; 1120 1121 ioapic = mp_find_ioapic(gsi); 1122 if (ioapic < 0) { 1123 printk(KERN_WARNING "No IOAPIC for GSI %u\n", gsi); 1124 return gsi; 1125 } 1126 1127 ioapic_pin = mp_find_ioapic_pin(ioapic, gsi); 1128 1129 if (ioapic_pin > MP_MAX_IOAPIC_PIN) { 1130 printk(KERN_ERR "Invalid reference to IOAPIC pin " 1131 "%d-%d\n", mpc_ioapic_id(ioapic), 1132 ioapic_pin); 1133 return gsi; 1134 } 1135 1136 if (enable_update_mptable) 1137 mp_config_acpi_gsi(dev, gsi, trigger, polarity); 1138 1139 set_io_apic_irq_attr(&irq_attr, ioapic, ioapic_pin, 1140 trigger == ACPI_EDGE_SENSITIVE ? 0 : 1, 1141 polarity == ACPI_ACTIVE_HIGH ? 0 : 1); 1142 io_apic_set_pci_routing(dev, gsi_to_irq(gsi), &irq_attr); 1143 1144 return gsi; 1145 } 1146 1147 /* 1148 * Parse IOAPIC related entries in MADT 1149 * returns 0 on success, < 0 on error 1150 */ 1151 static int __init acpi_parse_madt_ioapic_entries(void) 1152 { 1153 int count; 1154 1155 /* 1156 * ACPI interpreter is required to complete interrupt setup, 1157 * so if it is off, don't enumerate the io-apics with ACPI. 1158 * If MPS is present, it will handle them, 1159 * otherwise the system will stay in PIC mode 1160 */ 1161 if (acpi_disabled || acpi_noirq) 1162 return -ENODEV; 1163 1164 if (!cpu_has_apic) 1165 return -ENODEV; 1166 1167 /* 1168 * if "noapic" boot option, don't look for IO-APICs 1169 */ 1170 if (skip_ioapic_setup) { 1171 printk(KERN_INFO PREFIX "Skipping IOAPIC probe " 1172 "due to 'noapic' option.\n"); 1173 return -ENODEV; 1174 } 1175 1176 count = 1177 acpi_table_parse_madt(ACPI_MADT_TYPE_IO_APIC, acpi_parse_ioapic, 1178 MAX_IO_APICS); 1179 if (!count) { 1180 printk(KERN_ERR PREFIX "No IOAPIC entries present\n"); 1181 return -ENODEV; 1182 } else if (count < 0) { 1183 printk(KERN_ERR PREFIX "Error parsing IOAPIC entry\n"); 1184 return count; 1185 } 1186 1187 count = 1188 acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE, acpi_parse_int_src_ovr, 1189 nr_irqs); 1190 if (count < 0) { 1191 printk(KERN_ERR PREFIX 1192 "Error parsing interrupt source overrides entry\n"); 1193 /* TBD: Cleanup to allow fallback to MPS */ 1194 return count; 1195 } 1196 1197 /* 1198 * If BIOS did not supply an INT_SRC_OVR for the SCI 1199 * pretend we got one so we can set the SCI flags. 1200 */ 1201 if (!acpi_sci_override_gsi) 1202 acpi_sci_ioapic_setup(acpi_gbl_FADT.sci_interrupt, 0, 0, 1203 acpi_gbl_FADT.sci_interrupt); 1204 1205 /* Fill in identity legacy mappings where no override */ 1206 mp_config_acpi_legacy_irqs(); 1207 1208 count = 1209 acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE, acpi_parse_nmi_src, 1210 nr_irqs); 1211 if (count < 0) { 1212 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n"); 1213 /* TBD: Cleanup to allow fallback to MPS */ 1214 return count; 1215 } 1216 1217 return 0; 1218 } 1219 #else 1220 static inline int acpi_parse_madt_ioapic_entries(void) 1221 { 1222 return -1; 1223 } 1224 #endif /* !CONFIG_X86_IO_APIC */ 1225 1226 static void __init early_acpi_process_madt(void) 1227 { 1228 #ifdef CONFIG_X86_LOCAL_APIC 1229 int error; 1230 1231 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) { 1232 1233 /* 1234 * Parse MADT LAPIC entries 1235 */ 1236 error = early_acpi_parse_madt_lapic_addr_ovr(); 1237 if (!error) { 1238 acpi_lapic = 1; 1239 smp_found_config = 1; 1240 } 1241 if (error == -EINVAL) { 1242 /* 1243 * Dell Precision Workstation 410, 610 come here. 1244 */ 1245 printk(KERN_ERR PREFIX 1246 "Invalid BIOS MADT, disabling ACPI\n"); 1247 disable_acpi(); 1248 } 1249 } 1250 #endif 1251 } 1252 1253 static void __init acpi_process_madt(void) 1254 { 1255 #ifdef CONFIG_X86_LOCAL_APIC 1256 int error; 1257 1258 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) { 1259 1260 /* 1261 * Parse MADT LAPIC entries 1262 */ 1263 error = acpi_parse_madt_lapic_entries(); 1264 if (!error) { 1265 acpi_lapic = 1; 1266 1267 /* 1268 * Parse MADT IO-APIC entries 1269 */ 1270 error = acpi_parse_madt_ioapic_entries(); 1271 if (!error) { 1272 acpi_set_irq_model_ioapic(); 1273 1274 smp_found_config = 1; 1275 } 1276 } 1277 if (error == -EINVAL) { 1278 /* 1279 * Dell Precision Workstation 410, 610 come here. 1280 */ 1281 printk(KERN_ERR PREFIX 1282 "Invalid BIOS MADT, disabling ACPI\n"); 1283 disable_acpi(); 1284 } 1285 } else { 1286 /* 1287 * ACPI found no MADT, and so ACPI wants UP PIC mode. 1288 * In the event an MPS table was found, forget it. 1289 * Boot with "acpi=off" to use MPS on such a system. 1290 */ 1291 if (smp_found_config) { 1292 printk(KERN_WARNING PREFIX 1293 "No APIC-table, disabling MPS\n"); 1294 smp_found_config = 0; 1295 } 1296 } 1297 1298 /* 1299 * ACPI supports both logical (e.g. Hyper-Threading) and physical 1300 * processors, where MPS only supports physical. 1301 */ 1302 if (acpi_lapic && acpi_ioapic) 1303 printk(KERN_INFO "Using ACPI (MADT) for SMP configuration " 1304 "information\n"); 1305 else if (acpi_lapic) 1306 printk(KERN_INFO "Using ACPI for processor (LAPIC) " 1307 "configuration information\n"); 1308 #endif 1309 return; 1310 } 1311 1312 static int __init disable_acpi_irq(const struct dmi_system_id *d) 1313 { 1314 if (!acpi_force) { 1315 printk(KERN_NOTICE "%s detected: force use of acpi=noirq\n", 1316 d->ident); 1317 acpi_noirq_set(); 1318 } 1319 return 0; 1320 } 1321 1322 static int __init disable_acpi_pci(const struct dmi_system_id *d) 1323 { 1324 if (!acpi_force) { 1325 printk(KERN_NOTICE "%s detected: force use of pci=noacpi\n", 1326 d->ident); 1327 acpi_disable_pci(); 1328 } 1329 return 0; 1330 } 1331 1332 static int __init dmi_disable_acpi(const struct dmi_system_id *d) 1333 { 1334 if (!acpi_force) { 1335 printk(KERN_NOTICE "%s detected: acpi off\n", d->ident); 1336 disable_acpi(); 1337 } else { 1338 printk(KERN_NOTICE 1339 "Warning: DMI blacklist says broken, but acpi forced\n"); 1340 } 1341 return 0; 1342 } 1343 1344 /* 1345 * Force ignoring BIOS IRQ0 override 1346 */ 1347 static int __init dmi_ignore_irq0_timer_override(const struct dmi_system_id *d) 1348 { 1349 if (!acpi_skip_timer_override) { 1350 pr_notice("%s detected: Ignoring BIOS IRQ0 override\n", 1351 d->ident); 1352 acpi_skip_timer_override = 1; 1353 } 1354 return 0; 1355 } 1356 1357 /* 1358 * If your system is blacklisted here, but you find that acpi=force 1359 * works for you, please contact linux-acpi@vger.kernel.org 1360 */ 1361 static struct dmi_system_id __initdata acpi_dmi_table[] = { 1362 /* 1363 * Boxes that need ACPI disabled 1364 */ 1365 { 1366 .callback = dmi_disable_acpi, 1367 .ident = "IBM Thinkpad", 1368 .matches = { 1369 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), 1370 DMI_MATCH(DMI_BOARD_NAME, "2629H1G"), 1371 }, 1372 }, 1373 1374 /* 1375 * Boxes that need ACPI PCI IRQ routing disabled 1376 */ 1377 { 1378 .callback = disable_acpi_irq, 1379 .ident = "ASUS A7V", 1380 .matches = { 1381 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC"), 1382 DMI_MATCH(DMI_BOARD_NAME, "<A7V>"), 1383 /* newer BIOS, Revision 1011, does work */ 1384 DMI_MATCH(DMI_BIOS_VERSION, 1385 "ASUS A7V ACPI BIOS Revision 1007"), 1386 }, 1387 }, 1388 { 1389 /* 1390 * Latest BIOS for IBM 600E (1.16) has bad pcinum 1391 * for LPC bridge, which is needed for the PCI 1392 * interrupt links to work. DSDT fix is in bug 5966. 1393 * 2645, 2646 model numbers are shared with 600/600E/600X 1394 */ 1395 .callback = disable_acpi_irq, 1396 .ident = "IBM Thinkpad 600 Series 2645", 1397 .matches = { 1398 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), 1399 DMI_MATCH(DMI_BOARD_NAME, "2645"), 1400 }, 1401 }, 1402 { 1403 .callback = disable_acpi_irq, 1404 .ident = "IBM Thinkpad 600 Series 2646", 1405 .matches = { 1406 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), 1407 DMI_MATCH(DMI_BOARD_NAME, "2646"), 1408 }, 1409 }, 1410 /* 1411 * Boxes that need ACPI PCI IRQ routing and PCI scan disabled 1412 */ 1413 { /* _BBN 0 bug */ 1414 .callback = disable_acpi_pci, 1415 .ident = "ASUS PR-DLS", 1416 .matches = { 1417 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."), 1418 DMI_MATCH(DMI_BOARD_NAME, "PR-DLS"), 1419 DMI_MATCH(DMI_BIOS_VERSION, 1420 "ASUS PR-DLS ACPI BIOS Revision 1010"), 1421 DMI_MATCH(DMI_BIOS_DATE, "03/21/2003") 1422 }, 1423 }, 1424 { 1425 .callback = disable_acpi_pci, 1426 .ident = "Acer TravelMate 36x Laptop", 1427 .matches = { 1428 DMI_MATCH(DMI_SYS_VENDOR, "Acer"), 1429 DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"), 1430 }, 1431 }, 1432 {} 1433 }; 1434 1435 /* second table for DMI checks that should run after early-quirks */ 1436 static struct dmi_system_id __initdata acpi_dmi_table_late[] = { 1437 /* 1438 * HP laptops which use a DSDT reporting as HP/SB400/10000, 1439 * which includes some code which overrides all temperature 1440 * trip points to 16C if the INTIN2 input of the I/O APIC 1441 * is enabled. This input is incorrectly designated the 1442 * ISA IRQ 0 via an interrupt source override even though 1443 * it is wired to the output of the master 8259A and INTIN0 1444 * is not connected at all. Force ignoring BIOS IRQ0 1445 * override in that cases. 1446 */ 1447 { 1448 .callback = dmi_ignore_irq0_timer_override, 1449 .ident = "HP nx6115 laptop", 1450 .matches = { 1451 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 1452 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6115"), 1453 }, 1454 }, 1455 { 1456 .callback = dmi_ignore_irq0_timer_override, 1457 .ident = "HP NX6125 laptop", 1458 .matches = { 1459 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 1460 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6125"), 1461 }, 1462 }, 1463 { 1464 .callback = dmi_ignore_irq0_timer_override, 1465 .ident = "HP NX6325 laptop", 1466 .matches = { 1467 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 1468 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6325"), 1469 }, 1470 }, 1471 { 1472 .callback = dmi_ignore_irq0_timer_override, 1473 .ident = "HP 6715b laptop", 1474 .matches = { 1475 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 1476 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq 6715b"), 1477 }, 1478 }, 1479 { 1480 .callback = dmi_ignore_irq0_timer_override, 1481 .ident = "FUJITSU SIEMENS", 1482 .matches = { 1483 DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"), 1484 DMI_MATCH(DMI_PRODUCT_NAME, "AMILO PRO V2030"), 1485 }, 1486 }, 1487 {} 1488 }; 1489 1490 /* 1491 * acpi_boot_table_init() and acpi_boot_init() 1492 * called from setup_arch(), always. 1493 * 1. checksums all tables 1494 * 2. enumerates lapics 1495 * 3. enumerates io-apics 1496 * 1497 * acpi_table_init() is separate to allow reading SRAT without 1498 * other side effects. 1499 * 1500 * side effects of acpi_boot_init: 1501 * acpi_lapic = 1 if LAPIC found 1502 * acpi_ioapic = 1 if IOAPIC found 1503 * if (acpi_lapic && acpi_ioapic) smp_found_config = 1; 1504 * if acpi_blacklisted() acpi_disabled = 1; 1505 * acpi_irq_model=... 1506 * ... 1507 */ 1508 1509 void __init acpi_boot_table_init(void) 1510 { 1511 dmi_check_system(acpi_dmi_table); 1512 1513 /* 1514 * If acpi_disabled, bail out 1515 */ 1516 if (acpi_disabled) 1517 return; 1518 1519 /* 1520 * Initialize the ACPI boot-time table parser. 1521 */ 1522 if (acpi_table_init()) { 1523 disable_acpi(); 1524 return; 1525 } 1526 1527 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf); 1528 1529 /* 1530 * blacklist may disable ACPI entirely 1531 */ 1532 if (acpi_blacklisted()) { 1533 if (acpi_force) { 1534 printk(KERN_WARNING PREFIX "acpi=force override\n"); 1535 } else { 1536 printk(KERN_WARNING PREFIX "Disabling ACPI support\n"); 1537 disable_acpi(); 1538 return; 1539 } 1540 } 1541 } 1542 1543 int __init early_acpi_boot_init(void) 1544 { 1545 /* 1546 * If acpi_disabled, bail out 1547 */ 1548 if (acpi_disabled) 1549 return 1; 1550 1551 /* 1552 * Process the Multiple APIC Description Table (MADT), if present 1553 */ 1554 early_acpi_process_madt(); 1555 1556 return 0; 1557 } 1558 1559 int __init acpi_boot_init(void) 1560 { 1561 /* those are executed after early-quirks are executed */ 1562 dmi_check_system(acpi_dmi_table_late); 1563 1564 /* 1565 * If acpi_disabled, bail out 1566 */ 1567 if (acpi_disabled) 1568 return 1; 1569 1570 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf); 1571 1572 /* 1573 * set sci_int and PM timer address 1574 */ 1575 acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt); 1576 1577 /* 1578 * Process the Multiple APIC Description Table (MADT), if present 1579 */ 1580 acpi_process_madt(); 1581 1582 acpi_table_parse(ACPI_SIG_HPET, acpi_parse_hpet); 1583 1584 if (!acpi_noirq) 1585 x86_init.pci.init = pci_acpi_init; 1586 1587 return 0; 1588 } 1589 1590 static int __init parse_acpi(char *arg) 1591 { 1592 if (!arg) 1593 return -EINVAL; 1594 1595 /* "acpi=off" disables both ACPI table parsing and interpreter */ 1596 if (strcmp(arg, "off") == 0) { 1597 disable_acpi(); 1598 } 1599 /* acpi=force to over-ride black-list */ 1600 else if (strcmp(arg, "force") == 0) { 1601 acpi_force = 1; 1602 acpi_disabled = 0; 1603 } 1604 /* acpi=strict disables out-of-spec workarounds */ 1605 else if (strcmp(arg, "strict") == 0) { 1606 acpi_strict = 1; 1607 } 1608 /* acpi=rsdt use RSDT instead of XSDT */ 1609 else if (strcmp(arg, "rsdt") == 0) { 1610 acpi_rsdt_forced = 1; 1611 } 1612 /* "acpi=noirq" disables ACPI interrupt routing */ 1613 else if (strcmp(arg, "noirq") == 0) { 1614 acpi_noirq_set(); 1615 } 1616 /* "acpi=copy_dsdt" copys DSDT */ 1617 else if (strcmp(arg, "copy_dsdt") == 0) { 1618 acpi_gbl_copy_dsdt_locally = 1; 1619 } else { 1620 /* Core will printk when we return error. */ 1621 return -EINVAL; 1622 } 1623 return 0; 1624 } 1625 early_param("acpi", parse_acpi); 1626 1627 /* FIXME: Using pci= for an ACPI parameter is a travesty. */ 1628 static int __init parse_pci(char *arg) 1629 { 1630 if (arg && strcmp(arg, "noacpi") == 0) 1631 acpi_disable_pci(); 1632 return 0; 1633 } 1634 early_param("pci", parse_pci); 1635 1636 int __init acpi_mps_check(void) 1637 { 1638 #if defined(CONFIG_X86_LOCAL_APIC) && !defined(CONFIG_X86_MPPARSE) 1639 /* mptable code is not built-in*/ 1640 if (acpi_disabled || acpi_noirq) { 1641 printk(KERN_WARNING "MPS support code is not built-in.\n" 1642 "Using acpi=off or acpi=noirq or pci=noacpi " 1643 "may have problem\n"); 1644 return 1; 1645 } 1646 #endif 1647 return 0; 1648 } 1649 1650 #ifdef CONFIG_X86_IO_APIC 1651 static int __init parse_acpi_skip_timer_override(char *arg) 1652 { 1653 acpi_skip_timer_override = 1; 1654 return 0; 1655 } 1656 early_param("acpi_skip_timer_override", parse_acpi_skip_timer_override); 1657 1658 static int __init parse_acpi_use_timer_override(char *arg) 1659 { 1660 acpi_use_timer_override = 1; 1661 return 0; 1662 } 1663 early_param("acpi_use_timer_override", parse_acpi_use_timer_override); 1664 #endif /* CONFIG_X86_IO_APIC */ 1665 1666 static int __init setup_acpi_sci(char *s) 1667 { 1668 if (!s) 1669 return -EINVAL; 1670 if (!strcmp(s, "edge")) 1671 acpi_sci_flags = ACPI_MADT_TRIGGER_EDGE | 1672 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK); 1673 else if (!strcmp(s, "level")) 1674 acpi_sci_flags = ACPI_MADT_TRIGGER_LEVEL | 1675 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK); 1676 else if (!strcmp(s, "high")) 1677 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_HIGH | 1678 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK); 1679 else if (!strcmp(s, "low")) 1680 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_LOW | 1681 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK); 1682 else 1683 return -EINVAL; 1684 return 0; 1685 } 1686 early_param("acpi_sci", setup_acpi_sci); 1687 1688 int __acpi_acquire_global_lock(unsigned int *lock) 1689 { 1690 unsigned int old, new, val; 1691 do { 1692 old = *lock; 1693 new = (((old & ~0x3) + 2) + ((old >> 1) & 0x1)); 1694 val = cmpxchg(lock, old, new); 1695 } while (unlikely (val != old)); 1696 return (new < 3) ? -1 : 0; 1697 } 1698 1699 int __acpi_release_global_lock(unsigned int *lock) 1700 { 1701 unsigned int old, new, val; 1702 do { 1703 old = *lock; 1704 new = old & ~0x3; 1705 val = cmpxchg(lock, old, new); 1706 } while (unlikely (val != old)); 1707 return old & 0x1; 1708 } 1709 1710 void __init arch_reserve_mem_area(acpi_physical_address addr, size_t size) 1711 { 1712 e820_add_region(addr, size, E820_ACPI); 1713 update_e820(); 1714 } 1715