1 /* 2 * boot.c - Architecture-Specific Low-Level ACPI Boot Support 3 * 4 * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com> 5 * Copyright (C) 2001 Jun Nakajima <jun.nakajima@intel.com> 6 * 7 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 8 * 9 * This program is free software; you can redistribute it and/or modify 10 * it under the terms of the GNU General Public License as published by 11 * the Free Software Foundation; either version 2 of the License, or 12 * (at your option) any later version. 13 * 14 * This program is distributed in the hope that it will be useful, 15 * but WITHOUT ANY WARRANTY; without even the implied warranty of 16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 17 * GNU General Public License for more details. 18 * 19 * You should have received a copy of the GNU General Public License 20 * along with this program; if not, write to the Free Software 21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 22 * 23 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 24 */ 25 26 #include <linux/init.h> 27 #include <linux/acpi.h> 28 #include <linux/acpi_pmtmr.h> 29 #include <linux/efi.h> 30 #include <linux/cpumask.h> 31 #include <linux/module.h> 32 #include <linux/dmi.h> 33 #include <linux/irq.h> 34 #include <linux/slab.h> 35 #include <linux/bootmem.h> 36 #include <linux/ioport.h> 37 #include <linux/pci.h> 38 39 #include <asm/pci_x86.h> 40 #include <asm/pgtable.h> 41 #include <asm/io_apic.h> 42 #include <asm/apic.h> 43 #include <asm/io.h> 44 #include <asm/mpspec.h> 45 #include <asm/smp.h> 46 47 static int __initdata acpi_force = 0; 48 u32 acpi_rsdt_forced; 49 int acpi_disabled; 50 EXPORT_SYMBOL(acpi_disabled); 51 52 #ifdef CONFIG_X86_64 53 # include <asm/proto.h> 54 # include <asm/numa_64.h> 55 #endif /* X86 */ 56 57 #define BAD_MADT_ENTRY(entry, end) ( \ 58 (!entry) || (unsigned long)entry + sizeof(*entry) > end || \ 59 ((struct acpi_subtable_header *)entry)->length < sizeof(*entry)) 60 61 #define PREFIX "ACPI: " 62 63 int acpi_noirq; /* skip ACPI IRQ initialization */ 64 int acpi_pci_disabled; /* skip ACPI PCI scan and IRQ initialization */ 65 EXPORT_SYMBOL(acpi_pci_disabled); 66 67 int acpi_lapic; 68 int acpi_ioapic; 69 int acpi_strict; 70 71 u8 acpi_sci_flags __initdata; 72 int acpi_sci_override_gsi __initdata; 73 int acpi_skip_timer_override __initdata; 74 int acpi_use_timer_override __initdata; 75 76 #ifdef CONFIG_X86_LOCAL_APIC 77 static u64 acpi_lapic_addr __initdata = APIC_DEFAULT_PHYS_BASE; 78 #endif 79 80 #ifndef __HAVE_ARCH_CMPXCHG 81 #warning ACPI uses CMPXCHG, i486 and later hardware 82 #endif 83 84 /* -------------------------------------------------------------------------- 85 Boot-time Configuration 86 -------------------------------------------------------------------------- */ 87 88 /* 89 * The default interrupt routing model is PIC (8259). This gets 90 * overridden if IOAPICs are enumerated (below). 91 */ 92 enum acpi_irq_model_id acpi_irq_model = ACPI_IRQ_MODEL_PIC; 93 94 95 /* 96 * ISA irqs by default are the first 16 gsis but can be 97 * any gsi as specified by an interrupt source override. 98 */ 99 static u32 isa_irq_to_gsi[NR_IRQS_LEGACY] __read_mostly = { 100 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 101 }; 102 103 static unsigned int gsi_to_irq(unsigned int gsi) 104 { 105 unsigned int irq = gsi + NR_IRQS_LEGACY; 106 unsigned int i; 107 108 for (i = 0; i < NR_IRQS_LEGACY; i++) { 109 if (isa_irq_to_gsi[i] == gsi) { 110 return i; 111 } 112 } 113 114 /* Provide an identity mapping of gsi == irq 115 * except on truly weird platforms that have 116 * non isa irqs in the first 16 gsis. 117 */ 118 if (gsi >= NR_IRQS_LEGACY) 119 irq = gsi; 120 else 121 irq = gsi_top + gsi; 122 123 return irq; 124 } 125 126 static u32 irq_to_gsi(int irq) 127 { 128 unsigned int gsi; 129 130 if (irq < NR_IRQS_LEGACY) 131 gsi = isa_irq_to_gsi[irq]; 132 else if (irq < gsi_top) 133 gsi = irq; 134 else if (irq < (gsi_top + NR_IRQS_LEGACY)) 135 gsi = irq - gsi_top; 136 else 137 gsi = 0xffffffff; 138 139 return gsi; 140 } 141 142 /* 143 * Temporarily use the virtual area starting from FIX_IO_APIC_BASE_END, 144 * to map the target physical address. The problem is that set_fixmap() 145 * provides a single page, and it is possible that the page is not 146 * sufficient. 147 * By using this area, we can map up to MAX_IO_APICS pages temporarily, 148 * i.e. until the next __va_range() call. 149 * 150 * Important Safety Note: The fixed I/O APIC page numbers are *subtracted* 151 * from the fixed base. That's why we start at FIX_IO_APIC_BASE_END and 152 * count idx down while incrementing the phys address. 153 */ 154 char *__init __acpi_map_table(unsigned long phys, unsigned long size) 155 { 156 157 if (!phys || !size) 158 return NULL; 159 160 return early_ioremap(phys, size); 161 } 162 void __init __acpi_unmap_table(char *map, unsigned long size) 163 { 164 if (!map || !size) 165 return; 166 167 early_iounmap(map, size); 168 } 169 170 #ifdef CONFIG_X86_LOCAL_APIC 171 static int __init acpi_parse_madt(struct acpi_table_header *table) 172 { 173 struct acpi_table_madt *madt = NULL; 174 175 if (!cpu_has_apic) 176 return -EINVAL; 177 178 madt = (struct acpi_table_madt *)table; 179 if (!madt) { 180 printk(KERN_WARNING PREFIX "Unable to map MADT\n"); 181 return -ENODEV; 182 } 183 184 if (madt->address) { 185 acpi_lapic_addr = (u64) madt->address; 186 187 printk(KERN_DEBUG PREFIX "Local APIC address 0x%08x\n", 188 madt->address); 189 } 190 191 default_acpi_madt_oem_check(madt->header.oem_id, 192 madt->header.oem_table_id); 193 194 return 0; 195 } 196 197 static void __cpuinit acpi_register_lapic(int id, u8 enabled) 198 { 199 unsigned int ver = 0; 200 201 if (!enabled) { 202 ++disabled_cpus; 203 return; 204 } 205 206 if (boot_cpu_physical_apicid != -1U) 207 ver = apic_version[boot_cpu_physical_apicid]; 208 209 generic_processor_info(id, ver); 210 } 211 212 static int __init 213 acpi_parse_x2apic(struct acpi_subtable_header *header, const unsigned long end) 214 { 215 struct acpi_madt_local_x2apic *processor = NULL; 216 217 processor = (struct acpi_madt_local_x2apic *)header; 218 219 if (BAD_MADT_ENTRY(processor, end)) 220 return -EINVAL; 221 222 acpi_table_print_madt_entry(header); 223 224 #ifdef CONFIG_X86_X2APIC 225 /* 226 * We need to register disabled CPU as well to permit 227 * counting disabled CPUs. This allows us to size 228 * cpus_possible_map more accurately, to permit 229 * to not preallocating memory for all NR_CPUS 230 * when we use CPU hotplug. 231 */ 232 acpi_register_lapic(processor->local_apic_id, /* APIC ID */ 233 processor->lapic_flags & ACPI_MADT_ENABLED); 234 #else 235 printk(KERN_WARNING PREFIX "x2apic entry ignored\n"); 236 #endif 237 238 return 0; 239 } 240 241 static int __init 242 acpi_parse_lapic(struct acpi_subtable_header * header, const unsigned long end) 243 { 244 struct acpi_madt_local_apic *processor = NULL; 245 246 processor = (struct acpi_madt_local_apic *)header; 247 248 if (BAD_MADT_ENTRY(processor, end)) 249 return -EINVAL; 250 251 acpi_table_print_madt_entry(header); 252 253 /* 254 * We need to register disabled CPU as well to permit 255 * counting disabled CPUs. This allows us to size 256 * cpus_possible_map more accurately, to permit 257 * to not preallocating memory for all NR_CPUS 258 * when we use CPU hotplug. 259 */ 260 acpi_register_lapic(processor->id, /* APIC ID */ 261 processor->lapic_flags & ACPI_MADT_ENABLED); 262 263 return 0; 264 } 265 266 static int __init 267 acpi_parse_sapic(struct acpi_subtable_header *header, const unsigned long end) 268 { 269 struct acpi_madt_local_sapic *processor = NULL; 270 271 processor = (struct acpi_madt_local_sapic *)header; 272 273 if (BAD_MADT_ENTRY(processor, end)) 274 return -EINVAL; 275 276 acpi_table_print_madt_entry(header); 277 278 acpi_register_lapic((processor->id << 8) | processor->eid,/* APIC ID */ 279 processor->lapic_flags & ACPI_MADT_ENABLED); 280 281 return 0; 282 } 283 284 static int __init 285 acpi_parse_lapic_addr_ovr(struct acpi_subtable_header * header, 286 const unsigned long end) 287 { 288 struct acpi_madt_local_apic_override *lapic_addr_ovr = NULL; 289 290 lapic_addr_ovr = (struct acpi_madt_local_apic_override *)header; 291 292 if (BAD_MADT_ENTRY(lapic_addr_ovr, end)) 293 return -EINVAL; 294 295 acpi_lapic_addr = lapic_addr_ovr->address; 296 297 return 0; 298 } 299 300 static int __init 301 acpi_parse_x2apic_nmi(struct acpi_subtable_header *header, 302 const unsigned long end) 303 { 304 struct acpi_madt_local_x2apic_nmi *x2apic_nmi = NULL; 305 306 x2apic_nmi = (struct acpi_madt_local_x2apic_nmi *)header; 307 308 if (BAD_MADT_ENTRY(x2apic_nmi, end)) 309 return -EINVAL; 310 311 acpi_table_print_madt_entry(header); 312 313 if (x2apic_nmi->lint != 1) 314 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n"); 315 316 return 0; 317 } 318 319 static int __init 320 acpi_parse_lapic_nmi(struct acpi_subtable_header * header, const unsigned long end) 321 { 322 struct acpi_madt_local_apic_nmi *lapic_nmi = NULL; 323 324 lapic_nmi = (struct acpi_madt_local_apic_nmi *)header; 325 326 if (BAD_MADT_ENTRY(lapic_nmi, end)) 327 return -EINVAL; 328 329 acpi_table_print_madt_entry(header); 330 331 if (lapic_nmi->lint != 1) 332 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n"); 333 334 return 0; 335 } 336 337 #endif /*CONFIG_X86_LOCAL_APIC */ 338 339 #ifdef CONFIG_X86_IO_APIC 340 341 static int __init 342 acpi_parse_ioapic(struct acpi_subtable_header * header, const unsigned long end) 343 { 344 struct acpi_madt_io_apic *ioapic = NULL; 345 346 ioapic = (struct acpi_madt_io_apic *)header; 347 348 if (BAD_MADT_ENTRY(ioapic, end)) 349 return -EINVAL; 350 351 acpi_table_print_madt_entry(header); 352 353 mp_register_ioapic(ioapic->id, 354 ioapic->address, ioapic->global_irq_base); 355 356 return 0; 357 } 358 359 /* 360 * Parse Interrupt Source Override for the ACPI SCI 361 */ 362 static void __init acpi_sci_ioapic_setup(u8 bus_irq, u16 polarity, u16 trigger, u32 gsi) 363 { 364 if (trigger == 0) /* compatible SCI trigger is level */ 365 trigger = 3; 366 367 if (polarity == 0) /* compatible SCI polarity is low */ 368 polarity = 3; 369 370 /* Command-line over-ride via acpi_sci= */ 371 if (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) 372 trigger = (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2; 373 374 if (acpi_sci_flags & ACPI_MADT_POLARITY_MASK) 375 polarity = acpi_sci_flags & ACPI_MADT_POLARITY_MASK; 376 377 /* 378 * mp_config_acpi_legacy_irqs() already setup IRQs < 16 379 * If GSI is < 16, this will update its flags, 380 * else it will create a new mp_irqs[] entry. 381 */ 382 mp_override_legacy_irq(bus_irq, polarity, trigger, gsi); 383 384 /* 385 * stash over-ride to indicate we've been here 386 * and for later update of acpi_gbl_FADT 387 */ 388 acpi_sci_override_gsi = gsi; 389 return; 390 } 391 392 static int __init 393 acpi_parse_int_src_ovr(struct acpi_subtable_header * header, 394 const unsigned long end) 395 { 396 struct acpi_madt_interrupt_override *intsrc = NULL; 397 398 intsrc = (struct acpi_madt_interrupt_override *)header; 399 400 if (BAD_MADT_ENTRY(intsrc, end)) 401 return -EINVAL; 402 403 acpi_table_print_madt_entry(header); 404 405 if (intsrc->source_irq == acpi_gbl_FADT.sci_interrupt) { 406 acpi_sci_ioapic_setup(intsrc->source_irq, 407 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK, 408 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2, 409 intsrc->global_irq); 410 return 0; 411 } 412 413 if (acpi_skip_timer_override && 414 intsrc->source_irq == 0 && intsrc->global_irq == 2) { 415 printk(PREFIX "BIOS IRQ0 pin2 override ignored.\n"); 416 return 0; 417 } 418 419 mp_override_legacy_irq(intsrc->source_irq, 420 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK, 421 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2, 422 intsrc->global_irq); 423 424 return 0; 425 } 426 427 static int __init 428 acpi_parse_nmi_src(struct acpi_subtable_header * header, const unsigned long end) 429 { 430 struct acpi_madt_nmi_source *nmi_src = NULL; 431 432 nmi_src = (struct acpi_madt_nmi_source *)header; 433 434 if (BAD_MADT_ENTRY(nmi_src, end)) 435 return -EINVAL; 436 437 acpi_table_print_madt_entry(header); 438 439 /* TBD: Support nimsrc entries? */ 440 441 return 0; 442 } 443 444 #endif /* CONFIG_X86_IO_APIC */ 445 446 /* 447 * acpi_pic_sci_set_trigger() 448 * 449 * use ELCR to set PIC-mode trigger type for SCI 450 * 451 * If a PIC-mode SCI is not recognized or gives spurious IRQ7's 452 * it may require Edge Trigger -- use "acpi_sci=edge" 453 * 454 * Port 0x4d0-4d1 are ECLR1 and ECLR2, the Edge/Level Control Registers 455 * for the 8259 PIC. bit[n] = 1 means irq[n] is Level, otherwise Edge. 456 * ECLR1 is IRQs 0-7 (IRQ 0, 1, 2 must be 0) 457 * ECLR2 is IRQs 8-15 (IRQ 8, 13 must be 0) 458 */ 459 460 void __init acpi_pic_sci_set_trigger(unsigned int irq, u16 trigger) 461 { 462 unsigned int mask = 1 << irq; 463 unsigned int old, new; 464 465 /* Real old ELCR mask */ 466 old = inb(0x4d0) | (inb(0x4d1) << 8); 467 468 /* 469 * If we use ACPI to set PCI IRQs, then we should clear ELCR 470 * since we will set it correctly as we enable the PCI irq 471 * routing. 472 */ 473 new = acpi_noirq ? old : 0; 474 475 /* 476 * Update SCI information in the ELCR, it isn't in the PCI 477 * routing tables.. 478 */ 479 switch (trigger) { 480 case 1: /* Edge - clear */ 481 new &= ~mask; 482 break; 483 case 3: /* Level - set */ 484 new |= mask; 485 break; 486 } 487 488 if (old == new) 489 return; 490 491 printk(PREFIX "setting ELCR to %04x (from %04x)\n", new, old); 492 outb(new, 0x4d0); 493 outb(new >> 8, 0x4d1); 494 } 495 496 int acpi_gsi_to_irq(u32 gsi, unsigned int *irq) 497 { 498 *irq = gsi_to_irq(gsi); 499 500 #ifdef CONFIG_X86_IO_APIC 501 if (acpi_irq_model == ACPI_IRQ_MODEL_IOAPIC) 502 setup_IO_APIC_irq_extra(gsi); 503 #endif 504 505 return 0; 506 } 507 508 int acpi_isa_irq_to_gsi(unsigned isa_irq, u32 *gsi) 509 { 510 if (isa_irq >= 16) 511 return -1; 512 *gsi = irq_to_gsi(isa_irq); 513 return 0; 514 } 515 516 static int acpi_register_gsi_pic(struct device *dev, u32 gsi, 517 int trigger, int polarity) 518 { 519 #ifdef CONFIG_PCI 520 /* 521 * Make sure all (legacy) PCI IRQs are set as level-triggered. 522 */ 523 if (trigger == ACPI_LEVEL_SENSITIVE) 524 eisa_set_level_irq(gsi); 525 #endif 526 527 return gsi; 528 } 529 530 static int acpi_register_gsi_ioapic(struct device *dev, u32 gsi, 531 int trigger, int polarity) 532 { 533 #ifdef CONFIG_X86_IO_APIC 534 gsi = mp_register_gsi(dev, gsi, trigger, polarity); 535 #endif 536 537 return gsi; 538 } 539 540 int (*__acpi_register_gsi)(struct device *dev, u32 gsi, 541 int trigger, int polarity) = acpi_register_gsi_pic; 542 543 /* 544 * success: return IRQ number (>=0) 545 * failure: return < 0 546 */ 547 int acpi_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity) 548 { 549 unsigned int irq; 550 unsigned int plat_gsi = gsi; 551 552 plat_gsi = (*__acpi_register_gsi)(dev, gsi, trigger, polarity); 553 irq = gsi_to_irq(plat_gsi); 554 555 return irq; 556 } 557 558 void __init acpi_set_irq_model_pic(void) 559 { 560 acpi_irq_model = ACPI_IRQ_MODEL_PIC; 561 __acpi_register_gsi = acpi_register_gsi_pic; 562 acpi_ioapic = 0; 563 } 564 565 void __init acpi_set_irq_model_ioapic(void) 566 { 567 acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC; 568 __acpi_register_gsi = acpi_register_gsi_ioapic; 569 acpi_ioapic = 1; 570 } 571 572 /* 573 * ACPI based hotplug support for CPU 574 */ 575 #ifdef CONFIG_ACPI_HOTPLUG_CPU 576 #include <acpi/processor.h> 577 578 static void acpi_map_cpu2node(acpi_handle handle, int cpu, int physid) 579 { 580 #ifdef CONFIG_ACPI_NUMA 581 int nid; 582 583 nid = acpi_get_node(handle); 584 if (nid == -1 || !node_online(nid)) 585 return; 586 #ifdef CONFIG_X86_64 587 apicid_to_node[physid] = nid; 588 numa_set_node(cpu, nid); 589 #else /* CONFIG_X86_32 */ 590 apicid_2_node[physid] = nid; 591 cpu_to_node_map[cpu] = nid; 592 #endif 593 594 #endif 595 } 596 597 static int __cpuinit _acpi_map_lsapic(acpi_handle handle, int *pcpu) 598 { 599 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; 600 union acpi_object *obj; 601 struct acpi_madt_local_apic *lapic; 602 cpumask_var_t tmp_map, new_map; 603 u8 physid; 604 int cpu; 605 int retval = -ENOMEM; 606 607 if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer))) 608 return -EINVAL; 609 610 if (!buffer.length || !buffer.pointer) 611 return -EINVAL; 612 613 obj = buffer.pointer; 614 if (obj->type != ACPI_TYPE_BUFFER || 615 obj->buffer.length < sizeof(*lapic)) { 616 kfree(buffer.pointer); 617 return -EINVAL; 618 } 619 620 lapic = (struct acpi_madt_local_apic *)obj->buffer.pointer; 621 622 if (lapic->header.type != ACPI_MADT_TYPE_LOCAL_APIC || 623 !(lapic->lapic_flags & ACPI_MADT_ENABLED)) { 624 kfree(buffer.pointer); 625 return -EINVAL; 626 } 627 628 physid = lapic->id; 629 630 kfree(buffer.pointer); 631 buffer.length = ACPI_ALLOCATE_BUFFER; 632 buffer.pointer = NULL; 633 634 if (!alloc_cpumask_var(&tmp_map, GFP_KERNEL)) 635 goto out; 636 637 if (!alloc_cpumask_var(&new_map, GFP_KERNEL)) 638 goto free_tmp_map; 639 640 cpumask_copy(tmp_map, cpu_present_mask); 641 acpi_register_lapic(physid, lapic->lapic_flags & ACPI_MADT_ENABLED); 642 643 /* 644 * If mp_register_lapic successfully generates a new logical cpu 645 * number, then the following will get us exactly what was mapped 646 */ 647 cpumask_andnot(new_map, cpu_present_mask, tmp_map); 648 if (cpumask_empty(new_map)) { 649 printk ("Unable to map lapic to logical cpu number\n"); 650 retval = -EINVAL; 651 goto free_new_map; 652 } 653 654 acpi_processor_set_pdc(handle); 655 656 cpu = cpumask_first(new_map); 657 acpi_map_cpu2node(handle, cpu, physid); 658 659 *pcpu = cpu; 660 retval = 0; 661 662 free_new_map: 663 free_cpumask_var(new_map); 664 free_tmp_map: 665 free_cpumask_var(tmp_map); 666 out: 667 return retval; 668 } 669 670 /* wrapper to silence section mismatch warning */ 671 int __ref acpi_map_lsapic(acpi_handle handle, int *pcpu) 672 { 673 return _acpi_map_lsapic(handle, pcpu); 674 } 675 EXPORT_SYMBOL(acpi_map_lsapic); 676 677 int acpi_unmap_lsapic(int cpu) 678 { 679 per_cpu(x86_cpu_to_apicid, cpu) = -1; 680 set_cpu_present(cpu, false); 681 num_processors--; 682 683 return (0); 684 } 685 686 EXPORT_SYMBOL(acpi_unmap_lsapic); 687 #endif /* CONFIG_ACPI_HOTPLUG_CPU */ 688 689 int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base) 690 { 691 /* TBD */ 692 return -EINVAL; 693 } 694 695 EXPORT_SYMBOL(acpi_register_ioapic); 696 697 int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base) 698 { 699 /* TBD */ 700 return -EINVAL; 701 } 702 703 EXPORT_SYMBOL(acpi_unregister_ioapic); 704 705 static int __init acpi_parse_sbf(struct acpi_table_header *table) 706 { 707 struct acpi_table_boot *sb; 708 709 sb = (struct acpi_table_boot *)table; 710 if (!sb) { 711 printk(KERN_WARNING PREFIX "Unable to map SBF\n"); 712 return -ENODEV; 713 } 714 715 sbf_port = sb->cmos_index; /* Save CMOS port */ 716 717 return 0; 718 } 719 720 #ifdef CONFIG_HPET_TIMER 721 #include <asm/hpet.h> 722 723 static struct __initdata resource *hpet_res; 724 725 static int __init acpi_parse_hpet(struct acpi_table_header *table) 726 { 727 struct acpi_table_hpet *hpet_tbl; 728 729 hpet_tbl = (struct acpi_table_hpet *)table; 730 if (!hpet_tbl) { 731 printk(KERN_WARNING PREFIX "Unable to map HPET\n"); 732 return -ENODEV; 733 } 734 735 if (hpet_tbl->address.space_id != ACPI_SPACE_MEM) { 736 printk(KERN_WARNING PREFIX "HPET timers must be located in " 737 "memory.\n"); 738 return -1; 739 } 740 741 hpet_address = hpet_tbl->address.address; 742 hpet_blockid = hpet_tbl->sequence; 743 744 /* 745 * Some broken BIOSes advertise HPET at 0x0. We really do not 746 * want to allocate a resource there. 747 */ 748 if (!hpet_address) { 749 printk(KERN_WARNING PREFIX 750 "HPET id: %#x base: %#lx is invalid\n", 751 hpet_tbl->id, hpet_address); 752 return 0; 753 } 754 #ifdef CONFIG_X86_64 755 /* 756 * Some even more broken BIOSes advertise HPET at 757 * 0xfed0000000000000 instead of 0xfed00000. Fix it up and add 758 * some noise: 759 */ 760 if (hpet_address == 0xfed0000000000000UL) { 761 if (!hpet_force_user) { 762 printk(KERN_WARNING PREFIX "HPET id: %#x " 763 "base: 0xfed0000000000000 is bogus\n " 764 "try hpet=force on the kernel command line to " 765 "fix it up to 0xfed00000.\n", hpet_tbl->id); 766 hpet_address = 0; 767 return 0; 768 } 769 printk(KERN_WARNING PREFIX 770 "HPET id: %#x base: 0xfed0000000000000 fixed up " 771 "to 0xfed00000.\n", hpet_tbl->id); 772 hpet_address >>= 32; 773 } 774 #endif 775 printk(KERN_INFO PREFIX "HPET id: %#x base: %#lx\n", 776 hpet_tbl->id, hpet_address); 777 778 /* 779 * Allocate and initialize the HPET firmware resource for adding into 780 * the resource tree during the lateinit timeframe. 781 */ 782 #define HPET_RESOURCE_NAME_SIZE 9 783 hpet_res = alloc_bootmem(sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE); 784 785 hpet_res->name = (void *)&hpet_res[1]; 786 hpet_res->flags = IORESOURCE_MEM; 787 snprintf((char *)hpet_res->name, HPET_RESOURCE_NAME_SIZE, "HPET %u", 788 hpet_tbl->sequence); 789 790 hpet_res->start = hpet_address; 791 hpet_res->end = hpet_address + (1 * 1024) - 1; 792 793 return 0; 794 } 795 796 /* 797 * hpet_insert_resource inserts the HPET resources used into the resource 798 * tree. 799 */ 800 static __init int hpet_insert_resource(void) 801 { 802 if (!hpet_res) 803 return 1; 804 805 return insert_resource(&iomem_resource, hpet_res); 806 } 807 808 late_initcall(hpet_insert_resource); 809 810 #else 811 #define acpi_parse_hpet NULL 812 #endif 813 814 static int __init acpi_parse_fadt(struct acpi_table_header *table) 815 { 816 817 #ifdef CONFIG_X86_PM_TIMER 818 /* detect the location of the ACPI PM Timer */ 819 if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID) { 820 /* FADT rev. 2 */ 821 if (acpi_gbl_FADT.xpm_timer_block.space_id != 822 ACPI_ADR_SPACE_SYSTEM_IO) 823 return 0; 824 825 pmtmr_ioport = acpi_gbl_FADT.xpm_timer_block.address; 826 /* 827 * "X" fields are optional extensions to the original V1.0 828 * fields, so we must selectively expand V1.0 fields if the 829 * corresponding X field is zero. 830 */ 831 if (!pmtmr_ioport) 832 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block; 833 } else { 834 /* FADT rev. 1 */ 835 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block; 836 } 837 if (pmtmr_ioport) 838 printk(KERN_INFO PREFIX "PM-Timer IO Port: %#x\n", 839 pmtmr_ioport); 840 #endif 841 return 0; 842 } 843 844 #ifdef CONFIG_X86_LOCAL_APIC 845 /* 846 * Parse LAPIC entries in MADT 847 * returns 0 on success, < 0 on error 848 */ 849 850 static void __init acpi_register_lapic_address(unsigned long address) 851 { 852 mp_lapic_addr = address; 853 854 set_fixmap_nocache(FIX_APIC_BASE, address); 855 if (boot_cpu_physical_apicid == -1U) { 856 boot_cpu_physical_apicid = read_apic_id(); 857 apic_version[boot_cpu_physical_apicid] = 858 GET_APIC_VERSION(apic_read(APIC_LVR)); 859 } 860 } 861 862 static int __init early_acpi_parse_madt_lapic_addr_ovr(void) 863 { 864 int count; 865 866 if (!cpu_has_apic) 867 return -ENODEV; 868 869 /* 870 * Note that the LAPIC address is obtained from the MADT (32-bit value) 871 * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value). 872 */ 873 874 count = 875 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE, 876 acpi_parse_lapic_addr_ovr, 0); 877 if (count < 0) { 878 printk(KERN_ERR PREFIX 879 "Error parsing LAPIC address override entry\n"); 880 return count; 881 } 882 883 acpi_register_lapic_address(acpi_lapic_addr); 884 885 return count; 886 } 887 888 static int __init acpi_parse_madt_lapic_entries(void) 889 { 890 int count; 891 int x2count = 0; 892 893 if (!cpu_has_apic) 894 return -ENODEV; 895 896 /* 897 * Note that the LAPIC address is obtained from the MADT (32-bit value) 898 * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value). 899 */ 900 901 count = 902 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE, 903 acpi_parse_lapic_addr_ovr, 0); 904 if (count < 0) { 905 printk(KERN_ERR PREFIX 906 "Error parsing LAPIC address override entry\n"); 907 return count; 908 } 909 910 acpi_register_lapic_address(acpi_lapic_addr); 911 912 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC, 913 acpi_parse_sapic, MAX_APICS); 914 915 if (!count) { 916 x2count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC, 917 acpi_parse_x2apic, MAX_APICS); 918 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC, 919 acpi_parse_lapic, MAX_APICS); 920 } 921 if (!count && !x2count) { 922 printk(KERN_ERR PREFIX "No LAPIC entries present\n"); 923 /* TBD: Cleanup to allow fallback to MPS */ 924 return -ENODEV; 925 } else if (count < 0 || x2count < 0) { 926 printk(KERN_ERR PREFIX "Error parsing LAPIC entry\n"); 927 /* TBD: Cleanup to allow fallback to MPS */ 928 return count; 929 } 930 931 x2count = 932 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC_NMI, 933 acpi_parse_x2apic_nmi, 0); 934 count = 935 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI, acpi_parse_lapic_nmi, 0); 936 if (count < 0 || x2count < 0) { 937 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n"); 938 /* TBD: Cleanup to allow fallback to MPS */ 939 return count; 940 } 941 return 0; 942 } 943 #endif /* CONFIG_X86_LOCAL_APIC */ 944 945 #ifdef CONFIG_X86_IO_APIC 946 #define MP_ISA_BUS 0 947 948 #ifdef CONFIG_X86_ES7000 949 extern int es7000_plat; 950 #endif 951 952 static void assign_to_mp_irq(struct mpc_intsrc *m, 953 struct mpc_intsrc *mp_irq) 954 { 955 memcpy(mp_irq, m, sizeof(struct mpc_intsrc)); 956 } 957 958 static int mp_irq_cmp(struct mpc_intsrc *mp_irq, 959 struct mpc_intsrc *m) 960 { 961 return memcmp(mp_irq, m, sizeof(struct mpc_intsrc)); 962 } 963 964 static void save_mp_irq(struct mpc_intsrc *m) 965 { 966 int i; 967 968 for (i = 0; i < mp_irq_entries; i++) { 969 if (!mp_irq_cmp(&mp_irqs[i], m)) 970 return; 971 } 972 973 assign_to_mp_irq(m, &mp_irqs[mp_irq_entries]); 974 if (++mp_irq_entries == MAX_IRQ_SOURCES) 975 panic("Max # of irq sources exceeded!!\n"); 976 } 977 978 void __init mp_override_legacy_irq(u8 bus_irq, u8 polarity, u8 trigger, u32 gsi) 979 { 980 int ioapic; 981 int pin; 982 struct mpc_intsrc mp_irq; 983 984 /* 985 * Convert 'gsi' to 'ioapic.pin'. 986 */ 987 ioapic = mp_find_ioapic(gsi); 988 if (ioapic < 0) 989 return; 990 pin = mp_find_ioapic_pin(ioapic, gsi); 991 992 /* 993 * TBD: This check is for faulty timer entries, where the override 994 * erroneously sets the trigger to level, resulting in a HUGE 995 * increase of timer interrupts! 996 */ 997 if ((bus_irq == 0) && (trigger == 3)) 998 trigger = 1; 999 1000 mp_irq.type = MP_INTSRC; 1001 mp_irq.irqtype = mp_INT; 1002 mp_irq.irqflag = (trigger << 2) | polarity; 1003 mp_irq.srcbus = MP_ISA_BUS; 1004 mp_irq.srcbusirq = bus_irq; /* IRQ */ 1005 mp_irq.dstapic = mp_ioapics[ioapic].apicid; /* APIC ID */ 1006 mp_irq.dstirq = pin; /* INTIN# */ 1007 1008 save_mp_irq(&mp_irq); 1009 1010 isa_irq_to_gsi[bus_irq] = gsi; 1011 } 1012 1013 void __init mp_config_acpi_legacy_irqs(void) 1014 { 1015 int i; 1016 struct mpc_intsrc mp_irq; 1017 1018 #if defined (CONFIG_MCA) || defined (CONFIG_EISA) 1019 /* 1020 * Fabricate the legacy ISA bus (bus #31). 1021 */ 1022 mp_bus_id_to_type[MP_ISA_BUS] = MP_BUS_ISA; 1023 #endif 1024 set_bit(MP_ISA_BUS, mp_bus_not_pci); 1025 pr_debug("Bus #%d is ISA\n", MP_ISA_BUS); 1026 1027 #ifdef CONFIG_X86_ES7000 1028 /* 1029 * Older generations of ES7000 have no legacy identity mappings 1030 */ 1031 if (es7000_plat == 1) 1032 return; 1033 #endif 1034 1035 /* 1036 * Use the default configuration for the IRQs 0-15. Unless 1037 * overridden by (MADT) interrupt source override entries. 1038 */ 1039 for (i = 0; i < 16; i++) { 1040 int ioapic, pin; 1041 unsigned int dstapic; 1042 int idx; 1043 u32 gsi; 1044 1045 /* Locate the gsi that irq i maps to. */ 1046 if (acpi_isa_irq_to_gsi(i, &gsi)) 1047 continue; 1048 1049 /* 1050 * Locate the IOAPIC that manages the ISA IRQ. 1051 */ 1052 ioapic = mp_find_ioapic(gsi); 1053 if (ioapic < 0) 1054 continue; 1055 pin = mp_find_ioapic_pin(ioapic, gsi); 1056 dstapic = mp_ioapics[ioapic].apicid; 1057 1058 for (idx = 0; idx < mp_irq_entries; idx++) { 1059 struct mpc_intsrc *irq = mp_irqs + idx; 1060 1061 /* Do we already have a mapping for this ISA IRQ? */ 1062 if (irq->srcbus == MP_ISA_BUS && irq->srcbusirq == i) 1063 break; 1064 1065 /* Do we already have a mapping for this IOAPIC pin */ 1066 if (irq->dstapic == dstapic && irq->dstirq == pin) 1067 break; 1068 } 1069 1070 if (idx != mp_irq_entries) { 1071 printk(KERN_DEBUG "ACPI: IRQ%d used by override.\n", i); 1072 continue; /* IRQ already used */ 1073 } 1074 1075 mp_irq.type = MP_INTSRC; 1076 mp_irq.irqflag = 0; /* Conforming */ 1077 mp_irq.srcbus = MP_ISA_BUS; 1078 mp_irq.dstapic = dstapic; 1079 mp_irq.irqtype = mp_INT; 1080 mp_irq.srcbusirq = i; /* Identity mapped */ 1081 mp_irq.dstirq = pin; 1082 1083 save_mp_irq(&mp_irq); 1084 } 1085 } 1086 1087 static int mp_config_acpi_gsi(struct device *dev, u32 gsi, int trigger, 1088 int polarity) 1089 { 1090 #ifdef CONFIG_X86_MPPARSE 1091 struct mpc_intsrc mp_irq; 1092 struct pci_dev *pdev; 1093 unsigned char number; 1094 unsigned int devfn; 1095 int ioapic; 1096 u8 pin; 1097 1098 if (!acpi_ioapic) 1099 return 0; 1100 if (!dev) 1101 return 0; 1102 if (dev->bus != &pci_bus_type) 1103 return 0; 1104 1105 pdev = to_pci_dev(dev); 1106 number = pdev->bus->number; 1107 devfn = pdev->devfn; 1108 pin = pdev->pin; 1109 /* print the entry should happen on mptable identically */ 1110 mp_irq.type = MP_INTSRC; 1111 mp_irq.irqtype = mp_INT; 1112 mp_irq.irqflag = (trigger == ACPI_EDGE_SENSITIVE ? 4 : 0x0c) | 1113 (polarity == ACPI_ACTIVE_HIGH ? 1 : 3); 1114 mp_irq.srcbus = number; 1115 mp_irq.srcbusirq = (((devfn >> 3) & 0x1f) << 2) | ((pin - 1) & 3); 1116 ioapic = mp_find_ioapic(gsi); 1117 mp_irq.dstapic = mp_ioapics[ioapic].apicid; 1118 mp_irq.dstirq = mp_find_ioapic_pin(ioapic, gsi); 1119 1120 save_mp_irq(&mp_irq); 1121 #endif 1122 return 0; 1123 } 1124 1125 int mp_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity) 1126 { 1127 int ioapic; 1128 int ioapic_pin; 1129 struct io_apic_irq_attr irq_attr; 1130 1131 if (acpi_irq_model != ACPI_IRQ_MODEL_IOAPIC) 1132 return gsi; 1133 1134 /* Don't set up the ACPI SCI because it's already set up */ 1135 if (acpi_gbl_FADT.sci_interrupt == gsi) 1136 return gsi; 1137 1138 ioapic = mp_find_ioapic(gsi); 1139 if (ioapic < 0) { 1140 printk(KERN_WARNING "No IOAPIC for GSI %u\n", gsi); 1141 return gsi; 1142 } 1143 1144 ioapic_pin = mp_find_ioapic_pin(ioapic, gsi); 1145 1146 if (ioapic_pin > MP_MAX_IOAPIC_PIN) { 1147 printk(KERN_ERR "Invalid reference to IOAPIC pin " 1148 "%d-%d\n", mp_ioapics[ioapic].apicid, 1149 ioapic_pin); 1150 return gsi; 1151 } 1152 1153 if (enable_update_mptable) 1154 mp_config_acpi_gsi(dev, gsi, trigger, polarity); 1155 1156 set_io_apic_irq_attr(&irq_attr, ioapic, ioapic_pin, 1157 trigger == ACPI_EDGE_SENSITIVE ? 0 : 1, 1158 polarity == ACPI_ACTIVE_HIGH ? 0 : 1); 1159 io_apic_set_pci_routing(dev, gsi_to_irq(gsi), &irq_attr); 1160 1161 return gsi; 1162 } 1163 1164 /* 1165 * Parse IOAPIC related entries in MADT 1166 * returns 0 on success, < 0 on error 1167 */ 1168 static int __init acpi_parse_madt_ioapic_entries(void) 1169 { 1170 int count; 1171 1172 /* 1173 * ACPI interpreter is required to complete interrupt setup, 1174 * so if it is off, don't enumerate the io-apics with ACPI. 1175 * If MPS is present, it will handle them, 1176 * otherwise the system will stay in PIC mode 1177 */ 1178 if (acpi_disabled || acpi_noirq) 1179 return -ENODEV; 1180 1181 if (!cpu_has_apic) 1182 return -ENODEV; 1183 1184 /* 1185 * if "noapic" boot option, don't look for IO-APICs 1186 */ 1187 if (skip_ioapic_setup) { 1188 printk(KERN_INFO PREFIX "Skipping IOAPIC probe " 1189 "due to 'noapic' option.\n"); 1190 return -ENODEV; 1191 } 1192 1193 count = 1194 acpi_table_parse_madt(ACPI_MADT_TYPE_IO_APIC, acpi_parse_ioapic, 1195 MAX_IO_APICS); 1196 if (!count) { 1197 printk(KERN_ERR PREFIX "No IOAPIC entries present\n"); 1198 return -ENODEV; 1199 } else if (count < 0) { 1200 printk(KERN_ERR PREFIX "Error parsing IOAPIC entry\n"); 1201 return count; 1202 } 1203 1204 count = 1205 acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE, acpi_parse_int_src_ovr, 1206 nr_irqs); 1207 if (count < 0) { 1208 printk(KERN_ERR PREFIX 1209 "Error parsing interrupt source overrides entry\n"); 1210 /* TBD: Cleanup to allow fallback to MPS */ 1211 return count; 1212 } 1213 1214 /* 1215 * If BIOS did not supply an INT_SRC_OVR for the SCI 1216 * pretend we got one so we can set the SCI flags. 1217 */ 1218 if (!acpi_sci_override_gsi) 1219 acpi_sci_ioapic_setup(acpi_gbl_FADT.sci_interrupt, 0, 0, 1220 acpi_gbl_FADT.sci_interrupt); 1221 1222 /* Fill in identity legacy mappings where no override */ 1223 mp_config_acpi_legacy_irqs(); 1224 1225 count = 1226 acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE, acpi_parse_nmi_src, 1227 nr_irqs); 1228 if (count < 0) { 1229 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n"); 1230 /* TBD: Cleanup to allow fallback to MPS */ 1231 return count; 1232 } 1233 1234 return 0; 1235 } 1236 #else 1237 static inline int acpi_parse_madt_ioapic_entries(void) 1238 { 1239 return -1; 1240 } 1241 #endif /* !CONFIG_X86_IO_APIC */ 1242 1243 static void __init early_acpi_process_madt(void) 1244 { 1245 #ifdef CONFIG_X86_LOCAL_APIC 1246 int error; 1247 1248 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) { 1249 1250 /* 1251 * Parse MADT LAPIC entries 1252 */ 1253 error = early_acpi_parse_madt_lapic_addr_ovr(); 1254 if (!error) { 1255 acpi_lapic = 1; 1256 smp_found_config = 1; 1257 } 1258 if (error == -EINVAL) { 1259 /* 1260 * Dell Precision Workstation 410, 610 come here. 1261 */ 1262 printk(KERN_ERR PREFIX 1263 "Invalid BIOS MADT, disabling ACPI\n"); 1264 disable_acpi(); 1265 } 1266 } 1267 #endif 1268 } 1269 1270 static void __init acpi_process_madt(void) 1271 { 1272 #ifdef CONFIG_X86_LOCAL_APIC 1273 int error; 1274 1275 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) { 1276 1277 /* 1278 * Parse MADT LAPIC entries 1279 */ 1280 error = acpi_parse_madt_lapic_entries(); 1281 if (!error) { 1282 acpi_lapic = 1; 1283 1284 /* 1285 * Parse MADT IO-APIC entries 1286 */ 1287 error = acpi_parse_madt_ioapic_entries(); 1288 if (!error) { 1289 acpi_set_irq_model_ioapic(); 1290 1291 smp_found_config = 1; 1292 } 1293 } 1294 if (error == -EINVAL) { 1295 /* 1296 * Dell Precision Workstation 410, 610 come here. 1297 */ 1298 printk(KERN_ERR PREFIX 1299 "Invalid BIOS MADT, disabling ACPI\n"); 1300 disable_acpi(); 1301 } 1302 } else { 1303 /* 1304 * ACPI found no MADT, and so ACPI wants UP PIC mode. 1305 * In the event an MPS table was found, forget it. 1306 * Boot with "acpi=off" to use MPS on such a system. 1307 */ 1308 if (smp_found_config) { 1309 printk(KERN_WARNING PREFIX 1310 "No APIC-table, disabling MPS\n"); 1311 smp_found_config = 0; 1312 } 1313 } 1314 1315 /* 1316 * ACPI supports both logical (e.g. Hyper-Threading) and physical 1317 * processors, where MPS only supports physical. 1318 */ 1319 if (acpi_lapic && acpi_ioapic) 1320 printk(KERN_INFO "Using ACPI (MADT) for SMP configuration " 1321 "information\n"); 1322 else if (acpi_lapic) 1323 printk(KERN_INFO "Using ACPI for processor (LAPIC) " 1324 "configuration information\n"); 1325 #endif 1326 return; 1327 } 1328 1329 static int __init disable_acpi_irq(const struct dmi_system_id *d) 1330 { 1331 if (!acpi_force) { 1332 printk(KERN_NOTICE "%s detected: force use of acpi=noirq\n", 1333 d->ident); 1334 acpi_noirq_set(); 1335 } 1336 return 0; 1337 } 1338 1339 static int __init disable_acpi_pci(const struct dmi_system_id *d) 1340 { 1341 if (!acpi_force) { 1342 printk(KERN_NOTICE "%s detected: force use of pci=noacpi\n", 1343 d->ident); 1344 acpi_disable_pci(); 1345 } 1346 return 0; 1347 } 1348 1349 static int __init dmi_disable_acpi(const struct dmi_system_id *d) 1350 { 1351 if (!acpi_force) { 1352 printk(KERN_NOTICE "%s detected: acpi off\n", d->ident); 1353 disable_acpi(); 1354 } else { 1355 printk(KERN_NOTICE 1356 "Warning: DMI blacklist says broken, but acpi forced\n"); 1357 } 1358 return 0; 1359 } 1360 1361 /* 1362 * Force ignoring BIOS IRQ0 pin2 override 1363 */ 1364 static int __init dmi_ignore_irq0_timer_override(const struct dmi_system_id *d) 1365 { 1366 /* 1367 * The ati_ixp4x0_rev() early PCI quirk should have set 1368 * the acpi_skip_timer_override flag already: 1369 */ 1370 if (!acpi_skip_timer_override) { 1371 WARN(1, KERN_ERR "ati_ixp4x0 quirk not complete.\n"); 1372 pr_notice("%s detected: Ignoring BIOS IRQ0 pin2 override\n", 1373 d->ident); 1374 acpi_skip_timer_override = 1; 1375 } 1376 return 0; 1377 } 1378 1379 /* 1380 * If your system is blacklisted here, but you find that acpi=force 1381 * works for you, please contact linux-acpi@vger.kernel.org 1382 */ 1383 static struct dmi_system_id __initdata acpi_dmi_table[] = { 1384 /* 1385 * Boxes that need ACPI disabled 1386 */ 1387 { 1388 .callback = dmi_disable_acpi, 1389 .ident = "IBM Thinkpad", 1390 .matches = { 1391 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), 1392 DMI_MATCH(DMI_BOARD_NAME, "2629H1G"), 1393 }, 1394 }, 1395 1396 /* 1397 * Boxes that need ACPI PCI IRQ routing disabled 1398 */ 1399 { 1400 .callback = disable_acpi_irq, 1401 .ident = "ASUS A7V", 1402 .matches = { 1403 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC"), 1404 DMI_MATCH(DMI_BOARD_NAME, "<A7V>"), 1405 /* newer BIOS, Revision 1011, does work */ 1406 DMI_MATCH(DMI_BIOS_VERSION, 1407 "ASUS A7V ACPI BIOS Revision 1007"), 1408 }, 1409 }, 1410 { 1411 /* 1412 * Latest BIOS for IBM 600E (1.16) has bad pcinum 1413 * for LPC bridge, which is needed for the PCI 1414 * interrupt links to work. DSDT fix is in bug 5966. 1415 * 2645, 2646 model numbers are shared with 600/600E/600X 1416 */ 1417 .callback = disable_acpi_irq, 1418 .ident = "IBM Thinkpad 600 Series 2645", 1419 .matches = { 1420 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), 1421 DMI_MATCH(DMI_BOARD_NAME, "2645"), 1422 }, 1423 }, 1424 { 1425 .callback = disable_acpi_irq, 1426 .ident = "IBM Thinkpad 600 Series 2646", 1427 .matches = { 1428 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), 1429 DMI_MATCH(DMI_BOARD_NAME, "2646"), 1430 }, 1431 }, 1432 /* 1433 * Boxes that need ACPI PCI IRQ routing and PCI scan disabled 1434 */ 1435 { /* _BBN 0 bug */ 1436 .callback = disable_acpi_pci, 1437 .ident = "ASUS PR-DLS", 1438 .matches = { 1439 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."), 1440 DMI_MATCH(DMI_BOARD_NAME, "PR-DLS"), 1441 DMI_MATCH(DMI_BIOS_VERSION, 1442 "ASUS PR-DLS ACPI BIOS Revision 1010"), 1443 DMI_MATCH(DMI_BIOS_DATE, "03/21/2003") 1444 }, 1445 }, 1446 { 1447 .callback = disable_acpi_pci, 1448 .ident = "Acer TravelMate 36x Laptop", 1449 .matches = { 1450 DMI_MATCH(DMI_SYS_VENDOR, "Acer"), 1451 DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"), 1452 }, 1453 }, 1454 {} 1455 }; 1456 1457 /* second table for DMI checks that should run after early-quirks */ 1458 static struct dmi_system_id __initdata acpi_dmi_table_late[] = { 1459 /* 1460 * HP laptops which use a DSDT reporting as HP/SB400/10000, 1461 * which includes some code which overrides all temperature 1462 * trip points to 16C if the INTIN2 input of the I/O APIC 1463 * is enabled. This input is incorrectly designated the 1464 * ISA IRQ 0 via an interrupt source override even though 1465 * it is wired to the output of the master 8259A and INTIN0 1466 * is not connected at all. Force ignoring BIOS IRQ0 pin2 1467 * override in that cases. 1468 */ 1469 { 1470 .callback = dmi_ignore_irq0_timer_override, 1471 .ident = "HP nx6115 laptop", 1472 .matches = { 1473 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 1474 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6115"), 1475 }, 1476 }, 1477 { 1478 .callback = dmi_ignore_irq0_timer_override, 1479 .ident = "HP NX6125 laptop", 1480 .matches = { 1481 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 1482 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6125"), 1483 }, 1484 }, 1485 { 1486 .callback = dmi_ignore_irq0_timer_override, 1487 .ident = "HP NX6325 laptop", 1488 .matches = { 1489 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 1490 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6325"), 1491 }, 1492 }, 1493 { 1494 .callback = dmi_ignore_irq0_timer_override, 1495 .ident = "HP 6715b laptop", 1496 .matches = { 1497 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 1498 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq 6715b"), 1499 }, 1500 }, 1501 {} 1502 }; 1503 1504 /* 1505 * acpi_boot_table_init() and acpi_boot_init() 1506 * called from setup_arch(), always. 1507 * 1. checksums all tables 1508 * 2. enumerates lapics 1509 * 3. enumerates io-apics 1510 * 1511 * acpi_table_init() is separate to allow reading SRAT without 1512 * other side effects. 1513 * 1514 * side effects of acpi_boot_init: 1515 * acpi_lapic = 1 if LAPIC found 1516 * acpi_ioapic = 1 if IOAPIC found 1517 * if (acpi_lapic && acpi_ioapic) smp_found_config = 1; 1518 * if acpi_blacklisted() acpi_disabled = 1; 1519 * acpi_irq_model=... 1520 * ... 1521 */ 1522 1523 void __init acpi_boot_table_init(void) 1524 { 1525 dmi_check_system(acpi_dmi_table); 1526 1527 /* 1528 * If acpi_disabled, bail out 1529 */ 1530 if (acpi_disabled) 1531 return; 1532 1533 /* 1534 * Initialize the ACPI boot-time table parser. 1535 */ 1536 if (acpi_table_init()) { 1537 disable_acpi(); 1538 return; 1539 } 1540 1541 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf); 1542 1543 /* 1544 * blacklist may disable ACPI entirely 1545 */ 1546 if (acpi_blacklisted()) { 1547 if (acpi_force) { 1548 printk(KERN_WARNING PREFIX "acpi=force override\n"); 1549 } else { 1550 printk(KERN_WARNING PREFIX "Disabling ACPI support\n"); 1551 disable_acpi(); 1552 return; 1553 } 1554 } 1555 } 1556 1557 int __init early_acpi_boot_init(void) 1558 { 1559 /* 1560 * If acpi_disabled, bail out 1561 */ 1562 if (acpi_disabled) 1563 return 1; 1564 1565 /* 1566 * Process the Multiple APIC Description Table (MADT), if present 1567 */ 1568 early_acpi_process_madt(); 1569 1570 return 0; 1571 } 1572 1573 int __init acpi_boot_init(void) 1574 { 1575 /* those are executed after early-quirks are executed */ 1576 dmi_check_system(acpi_dmi_table_late); 1577 1578 /* 1579 * If acpi_disabled, bail out 1580 */ 1581 if (acpi_disabled) 1582 return 1; 1583 1584 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf); 1585 1586 /* 1587 * set sci_int and PM timer address 1588 */ 1589 acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt); 1590 1591 /* 1592 * Process the Multiple APIC Description Table (MADT), if present 1593 */ 1594 acpi_process_madt(); 1595 1596 acpi_table_parse(ACPI_SIG_HPET, acpi_parse_hpet); 1597 1598 if (!acpi_noirq) 1599 x86_init.pci.init = pci_acpi_init; 1600 1601 return 0; 1602 } 1603 1604 static int __init parse_acpi(char *arg) 1605 { 1606 if (!arg) 1607 return -EINVAL; 1608 1609 /* "acpi=off" disables both ACPI table parsing and interpreter */ 1610 if (strcmp(arg, "off") == 0) { 1611 disable_acpi(); 1612 } 1613 /* acpi=force to over-ride black-list */ 1614 else if (strcmp(arg, "force") == 0) { 1615 acpi_force = 1; 1616 acpi_disabled = 0; 1617 } 1618 /* acpi=strict disables out-of-spec workarounds */ 1619 else if (strcmp(arg, "strict") == 0) { 1620 acpi_strict = 1; 1621 } 1622 /* acpi=rsdt use RSDT instead of XSDT */ 1623 else if (strcmp(arg, "rsdt") == 0) { 1624 acpi_rsdt_forced = 1; 1625 } 1626 /* "acpi=noirq" disables ACPI interrupt routing */ 1627 else if (strcmp(arg, "noirq") == 0) { 1628 acpi_noirq_set(); 1629 } 1630 /* "acpi=copy_dsdt" copys DSDT */ 1631 else if (strcmp(arg, "copy_dsdt") == 0) { 1632 acpi_gbl_copy_dsdt_locally = 1; 1633 } else { 1634 /* Core will printk when we return error. */ 1635 return -EINVAL; 1636 } 1637 return 0; 1638 } 1639 early_param("acpi", parse_acpi); 1640 1641 /* FIXME: Using pci= for an ACPI parameter is a travesty. */ 1642 static int __init parse_pci(char *arg) 1643 { 1644 if (arg && strcmp(arg, "noacpi") == 0) 1645 acpi_disable_pci(); 1646 return 0; 1647 } 1648 early_param("pci", parse_pci); 1649 1650 int __init acpi_mps_check(void) 1651 { 1652 #if defined(CONFIG_X86_LOCAL_APIC) && !defined(CONFIG_X86_MPPARSE) 1653 /* mptable code is not built-in*/ 1654 if (acpi_disabled || acpi_noirq) { 1655 printk(KERN_WARNING "MPS support code is not built-in.\n" 1656 "Using acpi=off or acpi=noirq or pci=noacpi " 1657 "may have problem\n"); 1658 return 1; 1659 } 1660 #endif 1661 return 0; 1662 } 1663 1664 #ifdef CONFIG_X86_IO_APIC 1665 static int __init parse_acpi_skip_timer_override(char *arg) 1666 { 1667 acpi_skip_timer_override = 1; 1668 return 0; 1669 } 1670 early_param("acpi_skip_timer_override", parse_acpi_skip_timer_override); 1671 1672 static int __init parse_acpi_use_timer_override(char *arg) 1673 { 1674 acpi_use_timer_override = 1; 1675 return 0; 1676 } 1677 early_param("acpi_use_timer_override", parse_acpi_use_timer_override); 1678 #endif /* CONFIG_X86_IO_APIC */ 1679 1680 static int __init setup_acpi_sci(char *s) 1681 { 1682 if (!s) 1683 return -EINVAL; 1684 if (!strcmp(s, "edge")) 1685 acpi_sci_flags = ACPI_MADT_TRIGGER_EDGE | 1686 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK); 1687 else if (!strcmp(s, "level")) 1688 acpi_sci_flags = ACPI_MADT_TRIGGER_LEVEL | 1689 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK); 1690 else if (!strcmp(s, "high")) 1691 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_HIGH | 1692 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK); 1693 else if (!strcmp(s, "low")) 1694 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_LOW | 1695 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK); 1696 else 1697 return -EINVAL; 1698 return 0; 1699 } 1700 early_param("acpi_sci", setup_acpi_sci); 1701 1702 int __acpi_acquire_global_lock(unsigned int *lock) 1703 { 1704 unsigned int old, new, val; 1705 do { 1706 old = *lock; 1707 new = (((old & ~0x3) + 2) + ((old >> 1) & 0x1)); 1708 val = cmpxchg(lock, old, new); 1709 } while (unlikely (val != old)); 1710 return (new < 3) ? -1 : 0; 1711 } 1712 1713 int __acpi_release_global_lock(unsigned int *lock) 1714 { 1715 unsigned int old, new, val; 1716 do { 1717 old = *lock; 1718 new = old & ~0x3; 1719 val = cmpxchg(lock, old, new); 1720 } while (unlikely (val != old)); 1721 return old & 0x1; 1722 } 1723