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 int acpi_ht __initdata = 1; /* enable HT */ 67 68 int acpi_lapic; 69 int acpi_ioapic; 70 int acpi_strict; 71 72 u8 acpi_sci_flags __initdata; 73 int acpi_sci_override_gsi __initdata; 74 int acpi_skip_timer_override __initdata; 75 int acpi_use_timer_override __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_end + 1 + 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_end) 134 gsi = irq; 135 else if (irq <= (gsi_end + NR_IRQS_LEGACY)) 136 gsi = irq - gsi_end; 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 (!enabled) { 203 ++disabled_cpus; 204 return; 205 } 206 207 if (boot_cpu_physical_apicid != -1U) 208 ver = apic_version[boot_cpu_physical_apicid]; 209 210 generic_processor_info(id, ver); 211 } 212 213 static int __init 214 acpi_parse_x2apic(struct acpi_subtable_header *header, const unsigned long end) 215 { 216 struct acpi_madt_local_x2apic *processor = NULL; 217 218 processor = (struct acpi_madt_local_x2apic *)header; 219 220 if (BAD_MADT_ENTRY(processor, end)) 221 return -EINVAL; 222 223 acpi_table_print_madt_entry(header); 224 225 #ifdef CONFIG_X86_X2APIC 226 /* 227 * We need to register disabled CPU as well to permit 228 * counting disabled CPUs. This allows us to size 229 * cpus_possible_map more accurately, to permit 230 * to not preallocating memory for all NR_CPUS 231 * when we use CPU hotplug. 232 */ 233 acpi_register_lapic(processor->local_apic_id, /* APIC ID */ 234 processor->lapic_flags & ACPI_MADT_ENABLED); 235 #else 236 printk(KERN_WARNING PREFIX "x2apic entry ignored\n"); 237 #endif 238 239 return 0; 240 } 241 242 static int __init 243 acpi_parse_lapic(struct acpi_subtable_header * header, const unsigned long end) 244 { 245 struct acpi_madt_local_apic *processor = NULL; 246 247 processor = (struct acpi_madt_local_apic *)header; 248 249 if (BAD_MADT_ENTRY(processor, end)) 250 return -EINVAL; 251 252 acpi_table_print_madt_entry(header); 253 254 /* 255 * We need to register disabled CPU as well to permit 256 * counting disabled CPUs. This allows us to size 257 * cpus_possible_map more accurately, to permit 258 * to not preallocating memory for all NR_CPUS 259 * when we use CPU hotplug. 260 */ 261 acpi_register_lapic(processor->id, /* APIC ID */ 262 processor->lapic_flags & ACPI_MADT_ENABLED); 263 264 return 0; 265 } 266 267 static int __init 268 acpi_parse_sapic(struct acpi_subtable_header *header, const unsigned long end) 269 { 270 struct acpi_madt_local_sapic *processor = NULL; 271 272 processor = (struct acpi_madt_local_sapic *)header; 273 274 if (BAD_MADT_ENTRY(processor, end)) 275 return -EINVAL; 276 277 acpi_table_print_madt_entry(header); 278 279 acpi_register_lapic((processor->id << 8) | processor->eid,/* APIC ID */ 280 processor->lapic_flags & ACPI_MADT_ENABLED); 281 282 return 0; 283 } 284 285 static int __init 286 acpi_parse_lapic_addr_ovr(struct acpi_subtable_header * header, 287 const unsigned long end) 288 { 289 struct acpi_madt_local_apic_override *lapic_addr_ovr = NULL; 290 291 lapic_addr_ovr = (struct acpi_madt_local_apic_override *)header; 292 293 if (BAD_MADT_ENTRY(lapic_addr_ovr, end)) 294 return -EINVAL; 295 296 acpi_lapic_addr = lapic_addr_ovr->address; 297 298 return 0; 299 } 300 301 static int __init 302 acpi_parse_x2apic_nmi(struct acpi_subtable_header *header, 303 const unsigned long end) 304 { 305 struct acpi_madt_local_x2apic_nmi *x2apic_nmi = NULL; 306 307 x2apic_nmi = (struct acpi_madt_local_x2apic_nmi *)header; 308 309 if (BAD_MADT_ENTRY(x2apic_nmi, end)) 310 return -EINVAL; 311 312 acpi_table_print_madt_entry(header); 313 314 if (x2apic_nmi->lint != 1) 315 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n"); 316 317 return 0; 318 } 319 320 static int __init 321 acpi_parse_lapic_nmi(struct acpi_subtable_header * header, const unsigned long end) 322 { 323 struct acpi_madt_local_apic_nmi *lapic_nmi = NULL; 324 325 lapic_nmi = (struct acpi_madt_local_apic_nmi *)header; 326 327 if (BAD_MADT_ENTRY(lapic_nmi, end)) 328 return -EINVAL; 329 330 acpi_table_print_madt_entry(header); 331 332 if (lapic_nmi->lint != 1) 333 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n"); 334 335 return 0; 336 } 337 338 #endif /*CONFIG_X86_LOCAL_APIC */ 339 340 #ifdef CONFIG_X86_IO_APIC 341 342 static int __init 343 acpi_parse_ioapic(struct acpi_subtable_header * header, const unsigned long end) 344 { 345 struct acpi_madt_io_apic *ioapic = NULL; 346 347 ioapic = (struct acpi_madt_io_apic *)header; 348 349 if (BAD_MADT_ENTRY(ioapic, end)) 350 return -EINVAL; 351 352 acpi_table_print_madt_entry(header); 353 354 mp_register_ioapic(ioapic->id, 355 ioapic->address, ioapic->global_irq_base); 356 357 return 0; 358 } 359 360 /* 361 * Parse Interrupt Source Override for the ACPI SCI 362 */ 363 static void __init acpi_sci_ioapic_setup(u8 bus_irq, u16 polarity, u16 trigger, u32 gsi) 364 { 365 if (trigger == 0) /* compatible SCI trigger is level */ 366 trigger = 3; 367 368 if (polarity == 0) /* compatible SCI polarity is low */ 369 polarity = 3; 370 371 /* Command-line over-ride via acpi_sci= */ 372 if (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) 373 trigger = (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2; 374 375 if (acpi_sci_flags & ACPI_MADT_POLARITY_MASK) 376 polarity = acpi_sci_flags & ACPI_MADT_POLARITY_MASK; 377 378 /* 379 * mp_config_acpi_legacy_irqs() already setup IRQs < 16 380 * If GSI is < 16, this will update its flags, 381 * else it will create a new mp_irqs[] entry. 382 */ 383 mp_override_legacy_irq(bus_irq, polarity, trigger, gsi); 384 385 /* 386 * stash over-ride to indicate we've been here 387 * and for later update of acpi_gbl_FADT 388 */ 389 acpi_sci_override_gsi = gsi; 390 return; 391 } 392 393 static int __init 394 acpi_parse_int_src_ovr(struct acpi_subtable_header * header, 395 const unsigned long end) 396 { 397 struct acpi_madt_interrupt_override *intsrc = NULL; 398 399 intsrc = (struct acpi_madt_interrupt_override *)header; 400 401 if (BAD_MADT_ENTRY(intsrc, end)) 402 return -EINVAL; 403 404 acpi_table_print_madt_entry(header); 405 406 if (intsrc->source_irq == acpi_gbl_FADT.sci_interrupt) { 407 acpi_sci_ioapic_setup(intsrc->source_irq, 408 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK, 409 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2, 410 intsrc->global_irq); 411 return 0; 412 } 413 414 if (acpi_skip_timer_override && 415 intsrc->source_irq == 0 && intsrc->global_irq == 2) { 416 printk(PREFIX "BIOS IRQ0 pin2 override ignored.\n"); 417 return 0; 418 } 419 420 mp_override_legacy_irq(intsrc->source_irq, 421 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK, 422 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2, 423 intsrc->global_irq); 424 425 return 0; 426 } 427 428 static int __init 429 acpi_parse_nmi_src(struct acpi_subtable_header * header, const unsigned long end) 430 { 431 struct acpi_madt_nmi_source *nmi_src = NULL; 432 433 nmi_src = (struct acpi_madt_nmi_source *)header; 434 435 if (BAD_MADT_ENTRY(nmi_src, end)) 436 return -EINVAL; 437 438 acpi_table_print_madt_entry(header); 439 440 /* TBD: Support nimsrc entries? */ 441 442 return 0; 443 } 444 445 #endif /* CONFIG_X86_IO_APIC */ 446 447 /* 448 * acpi_pic_sci_set_trigger() 449 * 450 * use ELCR to set PIC-mode trigger type for SCI 451 * 452 * If a PIC-mode SCI is not recognized or gives spurious IRQ7's 453 * it may require Edge Trigger -- use "acpi_sci=edge" 454 * 455 * Port 0x4d0-4d1 are ECLR1 and ECLR2, the Edge/Level Control Registers 456 * for the 8259 PIC. bit[n] = 1 means irq[n] is Level, otherwise Edge. 457 * ECLR1 is IRQs 0-7 (IRQ 0, 1, 2 must be 0) 458 * ECLR2 is IRQs 8-15 (IRQ 8, 13 must be 0) 459 */ 460 461 void __init acpi_pic_sci_set_trigger(unsigned int irq, u16 trigger) 462 { 463 unsigned int mask = 1 << irq; 464 unsigned int old, new; 465 466 /* Real old ELCR mask */ 467 old = inb(0x4d0) | (inb(0x4d1) << 8); 468 469 /* 470 * If we use ACPI to set PCI IRQs, then we should clear ELCR 471 * since we will set it correctly as we enable the PCI irq 472 * routing. 473 */ 474 new = acpi_noirq ? old : 0; 475 476 /* 477 * Update SCI information in the ELCR, it isn't in the PCI 478 * routing tables.. 479 */ 480 switch (trigger) { 481 case 1: /* Edge - clear */ 482 new &= ~mask; 483 break; 484 case 3: /* Level - set */ 485 new |= mask; 486 break; 487 } 488 489 if (old == new) 490 return; 491 492 printk(PREFIX "setting ELCR to %04x (from %04x)\n", new, old); 493 outb(new, 0x4d0); 494 outb(new >> 8, 0x4d1); 495 } 496 497 int acpi_gsi_to_irq(u32 gsi, unsigned int *irq) 498 { 499 *irq = gsi_to_irq(gsi); 500 501 #ifdef CONFIG_X86_IO_APIC 502 if (acpi_irq_model == ACPI_IRQ_MODEL_IOAPIC) 503 setup_IO_APIC_irq_extra(gsi); 504 #endif 505 506 return 0; 507 } 508 509 int acpi_isa_irq_to_gsi(unsigned isa_irq, u32 *gsi) 510 { 511 if (isa_irq >= 16) 512 return -1; 513 *gsi = irq_to_gsi(isa_irq); 514 return 0; 515 } 516 517 /* 518 * success: return IRQ number (>=0) 519 * failure: return < 0 520 */ 521 int acpi_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity) 522 { 523 unsigned int irq; 524 unsigned int plat_gsi = gsi; 525 526 #ifdef CONFIG_PCI 527 /* 528 * Make sure all (legacy) PCI IRQs are set as level-triggered. 529 */ 530 if (acpi_irq_model == ACPI_IRQ_MODEL_PIC) { 531 if (trigger == ACPI_LEVEL_SENSITIVE) 532 eisa_set_level_irq(gsi); 533 } 534 #endif 535 536 #ifdef CONFIG_X86_IO_APIC 537 if (acpi_irq_model == ACPI_IRQ_MODEL_IOAPIC) { 538 plat_gsi = mp_register_gsi(dev, gsi, trigger, polarity); 539 } 540 #endif 541 irq = gsi_to_irq(plat_gsi); 542 543 return irq; 544 } 545 546 /* 547 * ACPI based hotplug support for CPU 548 */ 549 #ifdef CONFIG_ACPI_HOTPLUG_CPU 550 #include <acpi/processor.h> 551 552 static void acpi_map_cpu2node(acpi_handle handle, int cpu, int physid) 553 { 554 #ifdef CONFIG_ACPI_NUMA 555 int nid; 556 557 nid = acpi_get_node(handle); 558 if (nid == -1 || !node_online(nid)) 559 return; 560 #ifdef CONFIG_X86_64 561 apicid_to_node[physid] = nid; 562 numa_set_node(cpu, nid); 563 #else /* CONFIG_X86_32 */ 564 apicid_2_node[physid] = nid; 565 cpu_to_node_map[cpu] = nid; 566 #endif 567 568 #endif 569 } 570 571 static int __cpuinit _acpi_map_lsapic(acpi_handle handle, int *pcpu) 572 { 573 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; 574 union acpi_object *obj; 575 struct acpi_madt_local_apic *lapic; 576 cpumask_var_t tmp_map, new_map; 577 u8 physid; 578 int cpu; 579 int retval = -ENOMEM; 580 581 if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer))) 582 return -EINVAL; 583 584 if (!buffer.length || !buffer.pointer) 585 return -EINVAL; 586 587 obj = buffer.pointer; 588 if (obj->type != ACPI_TYPE_BUFFER || 589 obj->buffer.length < sizeof(*lapic)) { 590 kfree(buffer.pointer); 591 return -EINVAL; 592 } 593 594 lapic = (struct acpi_madt_local_apic *)obj->buffer.pointer; 595 596 if (lapic->header.type != ACPI_MADT_TYPE_LOCAL_APIC || 597 !(lapic->lapic_flags & ACPI_MADT_ENABLED)) { 598 kfree(buffer.pointer); 599 return -EINVAL; 600 } 601 602 physid = lapic->id; 603 604 kfree(buffer.pointer); 605 buffer.length = ACPI_ALLOCATE_BUFFER; 606 buffer.pointer = NULL; 607 608 if (!alloc_cpumask_var(&tmp_map, GFP_KERNEL)) 609 goto out; 610 611 if (!alloc_cpumask_var(&new_map, GFP_KERNEL)) 612 goto free_tmp_map; 613 614 cpumask_copy(tmp_map, cpu_present_mask); 615 acpi_register_lapic(physid, lapic->lapic_flags & ACPI_MADT_ENABLED); 616 617 /* 618 * If mp_register_lapic successfully generates a new logical cpu 619 * number, then the following will get us exactly what was mapped 620 */ 621 cpumask_andnot(new_map, cpu_present_mask, tmp_map); 622 if (cpumask_empty(new_map)) { 623 printk ("Unable to map lapic to logical cpu number\n"); 624 retval = -EINVAL; 625 goto free_new_map; 626 } 627 628 acpi_processor_set_pdc(handle); 629 630 cpu = cpumask_first(new_map); 631 acpi_map_cpu2node(handle, cpu, physid); 632 633 *pcpu = cpu; 634 retval = 0; 635 636 free_new_map: 637 free_cpumask_var(new_map); 638 free_tmp_map: 639 free_cpumask_var(tmp_map); 640 out: 641 return retval; 642 } 643 644 /* wrapper to silence section mismatch warning */ 645 int __ref acpi_map_lsapic(acpi_handle handle, int *pcpu) 646 { 647 return _acpi_map_lsapic(handle, pcpu); 648 } 649 EXPORT_SYMBOL(acpi_map_lsapic); 650 651 int acpi_unmap_lsapic(int cpu) 652 { 653 per_cpu(x86_cpu_to_apicid, cpu) = -1; 654 set_cpu_present(cpu, false); 655 num_processors--; 656 657 return (0); 658 } 659 660 EXPORT_SYMBOL(acpi_unmap_lsapic); 661 #endif /* CONFIG_ACPI_HOTPLUG_CPU */ 662 663 int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base) 664 { 665 /* TBD */ 666 return -EINVAL; 667 } 668 669 EXPORT_SYMBOL(acpi_register_ioapic); 670 671 int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base) 672 { 673 /* TBD */ 674 return -EINVAL; 675 } 676 677 EXPORT_SYMBOL(acpi_unregister_ioapic); 678 679 static int __init acpi_parse_sbf(struct acpi_table_header *table) 680 { 681 struct acpi_table_boot *sb; 682 683 sb = (struct acpi_table_boot *)table; 684 if (!sb) { 685 printk(KERN_WARNING PREFIX "Unable to map SBF\n"); 686 return -ENODEV; 687 } 688 689 sbf_port = sb->cmos_index; /* Save CMOS port */ 690 691 return 0; 692 } 693 694 #ifdef CONFIG_HPET_TIMER 695 #include <asm/hpet.h> 696 697 static struct __initdata resource *hpet_res; 698 699 static int __init acpi_parse_hpet(struct acpi_table_header *table) 700 { 701 struct acpi_table_hpet *hpet_tbl; 702 703 hpet_tbl = (struct acpi_table_hpet *)table; 704 if (!hpet_tbl) { 705 printk(KERN_WARNING PREFIX "Unable to map HPET\n"); 706 return -ENODEV; 707 } 708 709 if (hpet_tbl->address.space_id != ACPI_SPACE_MEM) { 710 printk(KERN_WARNING PREFIX "HPET timers must be located in " 711 "memory.\n"); 712 return -1; 713 } 714 715 hpet_address = hpet_tbl->address.address; 716 hpet_blockid = hpet_tbl->sequence; 717 718 /* 719 * Some broken BIOSes advertise HPET at 0x0. We really do not 720 * want to allocate a resource there. 721 */ 722 if (!hpet_address) { 723 printk(KERN_WARNING PREFIX 724 "HPET id: %#x base: %#lx is invalid\n", 725 hpet_tbl->id, hpet_address); 726 return 0; 727 } 728 #ifdef CONFIG_X86_64 729 /* 730 * Some even more broken BIOSes advertise HPET at 731 * 0xfed0000000000000 instead of 0xfed00000. Fix it up and add 732 * some noise: 733 */ 734 if (hpet_address == 0xfed0000000000000UL) { 735 if (!hpet_force_user) { 736 printk(KERN_WARNING PREFIX "HPET id: %#x " 737 "base: 0xfed0000000000000 is bogus\n " 738 "try hpet=force on the kernel command line to " 739 "fix it up to 0xfed00000.\n", hpet_tbl->id); 740 hpet_address = 0; 741 return 0; 742 } 743 printk(KERN_WARNING PREFIX 744 "HPET id: %#x base: 0xfed0000000000000 fixed up " 745 "to 0xfed00000.\n", hpet_tbl->id); 746 hpet_address >>= 32; 747 } 748 #endif 749 printk(KERN_INFO PREFIX "HPET id: %#x base: %#lx\n", 750 hpet_tbl->id, hpet_address); 751 752 /* 753 * Allocate and initialize the HPET firmware resource for adding into 754 * the resource tree during the lateinit timeframe. 755 */ 756 #define HPET_RESOURCE_NAME_SIZE 9 757 hpet_res = alloc_bootmem(sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE); 758 759 hpet_res->name = (void *)&hpet_res[1]; 760 hpet_res->flags = IORESOURCE_MEM; 761 snprintf((char *)hpet_res->name, HPET_RESOURCE_NAME_SIZE, "HPET %u", 762 hpet_tbl->sequence); 763 764 hpet_res->start = hpet_address; 765 hpet_res->end = hpet_address + (1 * 1024) - 1; 766 767 return 0; 768 } 769 770 /* 771 * hpet_insert_resource inserts the HPET resources used into the resource 772 * tree. 773 */ 774 static __init int hpet_insert_resource(void) 775 { 776 if (!hpet_res) 777 return 1; 778 779 return insert_resource(&iomem_resource, hpet_res); 780 } 781 782 late_initcall(hpet_insert_resource); 783 784 #else 785 #define acpi_parse_hpet NULL 786 #endif 787 788 static int __init acpi_parse_fadt(struct acpi_table_header *table) 789 { 790 791 #ifdef CONFIG_X86_PM_TIMER 792 /* detect the location of the ACPI PM Timer */ 793 if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID) { 794 /* FADT rev. 2 */ 795 if (acpi_gbl_FADT.xpm_timer_block.space_id != 796 ACPI_ADR_SPACE_SYSTEM_IO) 797 return 0; 798 799 pmtmr_ioport = acpi_gbl_FADT.xpm_timer_block.address; 800 /* 801 * "X" fields are optional extensions to the original V1.0 802 * fields, so we must selectively expand V1.0 fields if the 803 * corresponding X field is zero. 804 */ 805 if (!pmtmr_ioport) 806 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block; 807 } else { 808 /* FADT rev. 1 */ 809 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block; 810 } 811 if (pmtmr_ioport) 812 printk(KERN_INFO PREFIX "PM-Timer IO Port: %#x\n", 813 pmtmr_ioport); 814 #endif 815 return 0; 816 } 817 818 #ifdef CONFIG_X86_LOCAL_APIC 819 /* 820 * Parse LAPIC entries in MADT 821 * returns 0 on success, < 0 on error 822 */ 823 824 static void __init acpi_register_lapic_address(unsigned long address) 825 { 826 mp_lapic_addr = address; 827 828 set_fixmap_nocache(FIX_APIC_BASE, address); 829 if (boot_cpu_physical_apicid == -1U) { 830 boot_cpu_physical_apicid = read_apic_id(); 831 apic_version[boot_cpu_physical_apicid] = 832 GET_APIC_VERSION(apic_read(APIC_LVR)); 833 } 834 } 835 836 static int __init early_acpi_parse_madt_lapic_addr_ovr(void) 837 { 838 int count; 839 840 if (!cpu_has_apic) 841 return -ENODEV; 842 843 /* 844 * Note that the LAPIC address is obtained from the MADT (32-bit value) 845 * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value). 846 */ 847 848 count = 849 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE, 850 acpi_parse_lapic_addr_ovr, 0); 851 if (count < 0) { 852 printk(KERN_ERR PREFIX 853 "Error parsing LAPIC address override entry\n"); 854 return count; 855 } 856 857 acpi_register_lapic_address(acpi_lapic_addr); 858 859 return count; 860 } 861 862 static int __init acpi_parse_madt_lapic_entries(void) 863 { 864 int count; 865 int x2count = 0; 866 867 if (!cpu_has_apic) 868 return -ENODEV; 869 870 /* 871 * Note that the LAPIC address is obtained from the MADT (32-bit value) 872 * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value). 873 */ 874 875 count = 876 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE, 877 acpi_parse_lapic_addr_ovr, 0); 878 if (count < 0) { 879 printk(KERN_ERR PREFIX 880 "Error parsing LAPIC address override entry\n"); 881 return count; 882 } 883 884 acpi_register_lapic_address(acpi_lapic_addr); 885 886 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC, 887 acpi_parse_sapic, MAX_APICS); 888 889 if (!count) { 890 x2count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC, 891 acpi_parse_x2apic, MAX_APICS); 892 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC, 893 acpi_parse_lapic, MAX_APICS); 894 } 895 if (!count && !x2count) { 896 printk(KERN_ERR PREFIX "No LAPIC entries present\n"); 897 /* TBD: Cleanup to allow fallback to MPS */ 898 return -ENODEV; 899 } else if (count < 0 || x2count < 0) { 900 printk(KERN_ERR PREFIX "Error parsing LAPIC entry\n"); 901 /* TBD: Cleanup to allow fallback to MPS */ 902 return count; 903 } 904 905 x2count = 906 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC_NMI, 907 acpi_parse_x2apic_nmi, 0); 908 count = 909 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI, acpi_parse_lapic_nmi, 0); 910 if (count < 0 || x2count < 0) { 911 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n"); 912 /* TBD: Cleanup to allow fallback to MPS */ 913 return count; 914 } 915 return 0; 916 } 917 #endif /* CONFIG_X86_LOCAL_APIC */ 918 919 #ifdef CONFIG_X86_IO_APIC 920 #define MP_ISA_BUS 0 921 922 #ifdef CONFIG_X86_ES7000 923 extern int es7000_plat; 924 #endif 925 926 static void assign_to_mp_irq(struct mpc_intsrc *m, 927 struct mpc_intsrc *mp_irq) 928 { 929 memcpy(mp_irq, m, sizeof(struct mpc_intsrc)); 930 } 931 932 static int mp_irq_cmp(struct mpc_intsrc *mp_irq, 933 struct mpc_intsrc *m) 934 { 935 return memcmp(mp_irq, m, sizeof(struct mpc_intsrc)); 936 } 937 938 static void save_mp_irq(struct mpc_intsrc *m) 939 { 940 int i; 941 942 for (i = 0; i < mp_irq_entries; i++) { 943 if (!mp_irq_cmp(&mp_irqs[i], m)) 944 return; 945 } 946 947 assign_to_mp_irq(m, &mp_irqs[mp_irq_entries]); 948 if (++mp_irq_entries == MAX_IRQ_SOURCES) 949 panic("Max # of irq sources exceeded!!\n"); 950 } 951 952 void __init mp_override_legacy_irq(u8 bus_irq, u8 polarity, u8 trigger, u32 gsi) 953 { 954 int ioapic; 955 int pin; 956 struct mpc_intsrc mp_irq; 957 958 /* 959 * Convert 'gsi' to 'ioapic.pin'. 960 */ 961 ioapic = mp_find_ioapic(gsi); 962 if (ioapic < 0) 963 return; 964 pin = mp_find_ioapic_pin(ioapic, gsi); 965 966 /* 967 * TBD: This check is for faulty timer entries, where the override 968 * erroneously sets the trigger to level, resulting in a HUGE 969 * increase of timer interrupts! 970 */ 971 if ((bus_irq == 0) && (trigger == 3)) 972 trigger = 1; 973 974 mp_irq.type = MP_INTSRC; 975 mp_irq.irqtype = mp_INT; 976 mp_irq.irqflag = (trigger << 2) | polarity; 977 mp_irq.srcbus = MP_ISA_BUS; 978 mp_irq.srcbusirq = bus_irq; /* IRQ */ 979 mp_irq.dstapic = mp_ioapics[ioapic].apicid; /* APIC ID */ 980 mp_irq.dstirq = pin; /* INTIN# */ 981 982 save_mp_irq(&mp_irq); 983 984 isa_irq_to_gsi[bus_irq] = gsi; 985 } 986 987 void __init mp_config_acpi_legacy_irqs(void) 988 { 989 int i; 990 struct mpc_intsrc mp_irq; 991 992 #if defined (CONFIG_MCA) || defined (CONFIG_EISA) 993 /* 994 * Fabricate the legacy ISA bus (bus #31). 995 */ 996 mp_bus_id_to_type[MP_ISA_BUS] = MP_BUS_ISA; 997 #endif 998 set_bit(MP_ISA_BUS, mp_bus_not_pci); 999 pr_debug("Bus #%d is ISA\n", MP_ISA_BUS); 1000 1001 #ifdef CONFIG_X86_ES7000 1002 /* 1003 * Older generations of ES7000 have no legacy identity mappings 1004 */ 1005 if (es7000_plat == 1) 1006 return; 1007 #endif 1008 1009 /* 1010 * Use the default configuration for the IRQs 0-15. Unless 1011 * overridden by (MADT) interrupt source override entries. 1012 */ 1013 for (i = 0; i < 16; i++) { 1014 int ioapic, pin; 1015 unsigned int dstapic; 1016 int idx; 1017 u32 gsi; 1018 1019 /* Locate the gsi that irq i maps to. */ 1020 if (acpi_isa_irq_to_gsi(i, &gsi)) 1021 continue; 1022 1023 /* 1024 * Locate the IOAPIC that manages the ISA IRQ. 1025 */ 1026 ioapic = mp_find_ioapic(gsi); 1027 if (ioapic < 0) 1028 continue; 1029 pin = mp_find_ioapic_pin(ioapic, gsi); 1030 dstapic = mp_ioapics[ioapic].apicid; 1031 1032 for (idx = 0; idx < mp_irq_entries; idx++) { 1033 struct mpc_intsrc *irq = mp_irqs + idx; 1034 1035 /* Do we already have a mapping for this ISA IRQ? */ 1036 if (irq->srcbus == MP_ISA_BUS && irq->srcbusirq == i) 1037 break; 1038 1039 /* Do we already have a mapping for this IOAPIC pin */ 1040 if (irq->dstapic == dstapic && irq->dstirq == pin) 1041 break; 1042 } 1043 1044 if (idx != mp_irq_entries) { 1045 printk(KERN_DEBUG "ACPI: IRQ%d used by override.\n", i); 1046 continue; /* IRQ already used */ 1047 } 1048 1049 mp_irq.type = MP_INTSRC; 1050 mp_irq.irqflag = 0; /* Conforming */ 1051 mp_irq.srcbus = MP_ISA_BUS; 1052 mp_irq.dstapic = dstapic; 1053 mp_irq.irqtype = mp_INT; 1054 mp_irq.srcbusirq = i; /* Identity mapped */ 1055 mp_irq.dstirq = pin; 1056 1057 save_mp_irq(&mp_irq); 1058 } 1059 } 1060 1061 static int mp_config_acpi_gsi(struct device *dev, u32 gsi, int trigger, 1062 int polarity) 1063 { 1064 #ifdef CONFIG_X86_MPPARSE 1065 struct mpc_intsrc mp_irq; 1066 struct pci_dev *pdev; 1067 unsigned char number; 1068 unsigned int devfn; 1069 int ioapic; 1070 u8 pin; 1071 1072 if (!acpi_ioapic) 1073 return 0; 1074 if (!dev) 1075 return 0; 1076 if (dev->bus != &pci_bus_type) 1077 return 0; 1078 1079 pdev = to_pci_dev(dev); 1080 number = pdev->bus->number; 1081 devfn = pdev->devfn; 1082 pin = pdev->pin; 1083 /* print the entry should happen on mptable identically */ 1084 mp_irq.type = MP_INTSRC; 1085 mp_irq.irqtype = mp_INT; 1086 mp_irq.irqflag = (trigger == ACPI_EDGE_SENSITIVE ? 4 : 0x0c) | 1087 (polarity == ACPI_ACTIVE_HIGH ? 1 : 3); 1088 mp_irq.srcbus = number; 1089 mp_irq.srcbusirq = (((devfn >> 3) & 0x1f) << 2) | ((pin - 1) & 3); 1090 ioapic = mp_find_ioapic(gsi); 1091 mp_irq.dstapic = mp_ioapics[ioapic].apicid; 1092 mp_irq.dstirq = mp_find_ioapic_pin(ioapic, gsi); 1093 1094 save_mp_irq(&mp_irq); 1095 #endif 1096 return 0; 1097 } 1098 1099 int mp_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity) 1100 { 1101 int ioapic; 1102 int ioapic_pin; 1103 struct io_apic_irq_attr irq_attr; 1104 1105 if (acpi_irq_model != ACPI_IRQ_MODEL_IOAPIC) 1106 return gsi; 1107 1108 /* Don't set up the ACPI SCI because it's already set up */ 1109 if (acpi_gbl_FADT.sci_interrupt == gsi) 1110 return gsi; 1111 1112 ioapic = mp_find_ioapic(gsi); 1113 if (ioapic < 0) { 1114 printk(KERN_WARNING "No IOAPIC for GSI %u\n", gsi); 1115 return gsi; 1116 } 1117 1118 ioapic_pin = mp_find_ioapic_pin(ioapic, gsi); 1119 1120 if (ioapic_pin > MP_MAX_IOAPIC_PIN) { 1121 printk(KERN_ERR "Invalid reference to IOAPIC pin " 1122 "%d-%d\n", mp_ioapics[ioapic].apicid, 1123 ioapic_pin); 1124 return gsi; 1125 } 1126 1127 if (enable_update_mptable) 1128 mp_config_acpi_gsi(dev, gsi, trigger, polarity); 1129 1130 set_io_apic_irq_attr(&irq_attr, ioapic, ioapic_pin, 1131 trigger == ACPI_EDGE_SENSITIVE ? 0 : 1, 1132 polarity == ACPI_ACTIVE_HIGH ? 0 : 1); 1133 io_apic_set_pci_routing(dev, gsi_to_irq(gsi), &irq_attr); 1134 1135 return gsi; 1136 } 1137 1138 /* 1139 * Parse IOAPIC related entries in MADT 1140 * returns 0 on success, < 0 on error 1141 */ 1142 static int __init acpi_parse_madt_ioapic_entries(void) 1143 { 1144 int count; 1145 1146 /* 1147 * ACPI interpreter is required to complete interrupt setup, 1148 * so if it is off, don't enumerate the io-apics with ACPI. 1149 * If MPS is present, it will handle them, 1150 * otherwise the system will stay in PIC mode 1151 */ 1152 if (acpi_disabled || acpi_noirq) 1153 return -ENODEV; 1154 1155 if (!cpu_has_apic) 1156 return -ENODEV; 1157 1158 /* 1159 * if "noapic" boot option, don't look for IO-APICs 1160 */ 1161 if (skip_ioapic_setup) { 1162 printk(KERN_INFO PREFIX "Skipping IOAPIC probe " 1163 "due to 'noapic' option.\n"); 1164 return -ENODEV; 1165 } 1166 1167 count = 1168 acpi_table_parse_madt(ACPI_MADT_TYPE_IO_APIC, acpi_parse_ioapic, 1169 MAX_IO_APICS); 1170 if (!count) { 1171 printk(KERN_ERR PREFIX "No IOAPIC entries present\n"); 1172 return -ENODEV; 1173 } else if (count < 0) { 1174 printk(KERN_ERR PREFIX "Error parsing IOAPIC entry\n"); 1175 return count; 1176 } 1177 1178 count = 1179 acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE, acpi_parse_int_src_ovr, 1180 nr_irqs); 1181 if (count < 0) { 1182 printk(KERN_ERR PREFIX 1183 "Error parsing interrupt source overrides entry\n"); 1184 /* TBD: Cleanup to allow fallback to MPS */ 1185 return count; 1186 } 1187 1188 /* 1189 * If BIOS did not supply an INT_SRC_OVR for the SCI 1190 * pretend we got one so we can set the SCI flags. 1191 */ 1192 if (!acpi_sci_override_gsi) 1193 acpi_sci_ioapic_setup(acpi_gbl_FADT.sci_interrupt, 0, 0, 1194 acpi_gbl_FADT.sci_interrupt); 1195 1196 /* Fill in identity legacy mappings where no override */ 1197 mp_config_acpi_legacy_irqs(); 1198 1199 count = 1200 acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE, acpi_parse_nmi_src, 1201 nr_irqs); 1202 if (count < 0) { 1203 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n"); 1204 /* TBD: Cleanup to allow fallback to MPS */ 1205 return count; 1206 } 1207 1208 return 0; 1209 } 1210 #else 1211 static inline int acpi_parse_madt_ioapic_entries(void) 1212 { 1213 return -1; 1214 } 1215 #endif /* !CONFIG_X86_IO_APIC */ 1216 1217 static void __init early_acpi_process_madt(void) 1218 { 1219 #ifdef CONFIG_X86_LOCAL_APIC 1220 int error; 1221 1222 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) { 1223 1224 /* 1225 * Parse MADT LAPIC entries 1226 */ 1227 error = early_acpi_parse_madt_lapic_addr_ovr(); 1228 if (!error) { 1229 acpi_lapic = 1; 1230 smp_found_config = 1; 1231 } 1232 if (error == -EINVAL) { 1233 /* 1234 * Dell Precision Workstation 410, 610 come here. 1235 */ 1236 printk(KERN_ERR PREFIX 1237 "Invalid BIOS MADT, disabling ACPI\n"); 1238 disable_acpi(); 1239 } 1240 } 1241 #endif 1242 } 1243 1244 static void __init acpi_process_madt(void) 1245 { 1246 #ifdef CONFIG_X86_LOCAL_APIC 1247 int error; 1248 1249 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) { 1250 1251 /* 1252 * Parse MADT LAPIC entries 1253 */ 1254 error = acpi_parse_madt_lapic_entries(); 1255 if (!error) { 1256 acpi_lapic = 1; 1257 1258 /* 1259 * Parse MADT IO-APIC entries 1260 */ 1261 error = acpi_parse_madt_ioapic_entries(); 1262 if (!error) { 1263 acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC; 1264 acpi_ioapic = 1; 1265 1266 smp_found_config = 1; 1267 } 1268 } 1269 if (error == -EINVAL) { 1270 /* 1271 * Dell Precision Workstation 410, 610 come here. 1272 */ 1273 printk(KERN_ERR PREFIX 1274 "Invalid BIOS MADT, disabling ACPI\n"); 1275 disable_acpi(); 1276 } 1277 } else { 1278 /* 1279 * ACPI found no MADT, and so ACPI wants UP PIC mode. 1280 * In the event an MPS table was found, forget it. 1281 * Boot with "acpi=off" to use MPS on such a system. 1282 */ 1283 if (smp_found_config) { 1284 printk(KERN_WARNING PREFIX 1285 "No APIC-table, disabling MPS\n"); 1286 smp_found_config = 0; 1287 } 1288 } 1289 1290 /* 1291 * ACPI supports both logical (e.g. Hyper-Threading) and physical 1292 * processors, where MPS only supports physical. 1293 */ 1294 if (acpi_lapic && acpi_ioapic) 1295 printk(KERN_INFO "Using ACPI (MADT) for SMP configuration " 1296 "information\n"); 1297 else if (acpi_lapic) 1298 printk(KERN_INFO "Using ACPI for processor (LAPIC) " 1299 "configuration information\n"); 1300 #endif 1301 return; 1302 } 1303 1304 static int __init disable_acpi_irq(const struct dmi_system_id *d) 1305 { 1306 if (!acpi_force) { 1307 printk(KERN_NOTICE "%s detected: force use of acpi=noirq\n", 1308 d->ident); 1309 acpi_noirq_set(); 1310 } 1311 return 0; 1312 } 1313 1314 static int __init disable_acpi_pci(const struct dmi_system_id *d) 1315 { 1316 if (!acpi_force) { 1317 printk(KERN_NOTICE "%s detected: force use of pci=noacpi\n", 1318 d->ident); 1319 acpi_disable_pci(); 1320 } 1321 return 0; 1322 } 1323 1324 static int __init dmi_disable_acpi(const struct dmi_system_id *d) 1325 { 1326 if (!acpi_force) { 1327 printk(KERN_NOTICE "%s detected: acpi off\n", d->ident); 1328 disable_acpi(); 1329 } else { 1330 printk(KERN_NOTICE 1331 "Warning: DMI blacklist says broken, but acpi forced\n"); 1332 } 1333 return 0; 1334 } 1335 1336 /* 1337 * Force ignoring BIOS IRQ0 pin2 override 1338 */ 1339 static int __init dmi_ignore_irq0_timer_override(const struct dmi_system_id *d) 1340 { 1341 /* 1342 * The ati_ixp4x0_rev() early PCI quirk should have set 1343 * the acpi_skip_timer_override flag already: 1344 */ 1345 if (!acpi_skip_timer_override) { 1346 WARN(1, KERN_ERR "ati_ixp4x0 quirk not complete.\n"); 1347 pr_notice("%s detected: Ignoring BIOS IRQ0 pin2 override\n", 1348 d->ident); 1349 acpi_skip_timer_override = 1; 1350 } 1351 return 0; 1352 } 1353 1354 /* 1355 * If your system is blacklisted here, but you find that acpi=force 1356 * works for you, please contact linux-acpi@vger.kernel.org 1357 */ 1358 static struct dmi_system_id __initdata acpi_dmi_table[] = { 1359 /* 1360 * Boxes that need ACPI disabled 1361 */ 1362 { 1363 .callback = dmi_disable_acpi, 1364 .ident = "IBM Thinkpad", 1365 .matches = { 1366 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), 1367 DMI_MATCH(DMI_BOARD_NAME, "2629H1G"), 1368 }, 1369 }, 1370 1371 /* 1372 * Boxes that need ACPI PCI IRQ routing disabled 1373 */ 1374 { 1375 .callback = disable_acpi_irq, 1376 .ident = "ASUS A7V", 1377 .matches = { 1378 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC"), 1379 DMI_MATCH(DMI_BOARD_NAME, "<A7V>"), 1380 /* newer BIOS, Revision 1011, does work */ 1381 DMI_MATCH(DMI_BIOS_VERSION, 1382 "ASUS A7V ACPI BIOS Revision 1007"), 1383 }, 1384 }, 1385 { 1386 /* 1387 * Latest BIOS for IBM 600E (1.16) has bad pcinum 1388 * for LPC bridge, which is needed for the PCI 1389 * interrupt links to work. DSDT fix is in bug 5966. 1390 * 2645, 2646 model numbers are shared with 600/600E/600X 1391 */ 1392 .callback = disable_acpi_irq, 1393 .ident = "IBM Thinkpad 600 Series 2645", 1394 .matches = { 1395 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), 1396 DMI_MATCH(DMI_BOARD_NAME, "2645"), 1397 }, 1398 }, 1399 { 1400 .callback = disable_acpi_irq, 1401 .ident = "IBM Thinkpad 600 Series 2646", 1402 .matches = { 1403 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), 1404 DMI_MATCH(DMI_BOARD_NAME, "2646"), 1405 }, 1406 }, 1407 /* 1408 * Boxes that need ACPI PCI IRQ routing and PCI scan disabled 1409 */ 1410 { /* _BBN 0 bug */ 1411 .callback = disable_acpi_pci, 1412 .ident = "ASUS PR-DLS", 1413 .matches = { 1414 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."), 1415 DMI_MATCH(DMI_BOARD_NAME, "PR-DLS"), 1416 DMI_MATCH(DMI_BIOS_VERSION, 1417 "ASUS PR-DLS ACPI BIOS Revision 1010"), 1418 DMI_MATCH(DMI_BIOS_DATE, "03/21/2003") 1419 }, 1420 }, 1421 { 1422 .callback = disable_acpi_pci, 1423 .ident = "Acer TravelMate 36x Laptop", 1424 .matches = { 1425 DMI_MATCH(DMI_SYS_VENDOR, "Acer"), 1426 DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"), 1427 }, 1428 }, 1429 {} 1430 }; 1431 1432 /* second table for DMI checks that should run after early-quirks */ 1433 static struct dmi_system_id __initdata acpi_dmi_table_late[] = { 1434 /* 1435 * HP laptops which use a DSDT reporting as HP/SB400/10000, 1436 * which includes some code which overrides all temperature 1437 * trip points to 16C if the INTIN2 input of the I/O APIC 1438 * is enabled. This input is incorrectly designated the 1439 * ISA IRQ 0 via an interrupt source override even though 1440 * it is wired to the output of the master 8259A and INTIN0 1441 * is not connected at all. Force ignoring BIOS IRQ0 pin2 1442 * override in that cases. 1443 */ 1444 { 1445 .callback = dmi_ignore_irq0_timer_override, 1446 .ident = "HP nx6115 laptop", 1447 .matches = { 1448 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 1449 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6115"), 1450 }, 1451 }, 1452 { 1453 .callback = dmi_ignore_irq0_timer_override, 1454 .ident = "HP NX6125 laptop", 1455 .matches = { 1456 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 1457 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6125"), 1458 }, 1459 }, 1460 { 1461 .callback = dmi_ignore_irq0_timer_override, 1462 .ident = "HP NX6325 laptop", 1463 .matches = { 1464 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 1465 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6325"), 1466 }, 1467 }, 1468 { 1469 .callback = dmi_ignore_irq0_timer_override, 1470 .ident = "HP 6715b laptop", 1471 .matches = { 1472 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 1473 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq 6715b"), 1474 }, 1475 }, 1476 {} 1477 }; 1478 1479 /* 1480 * acpi_boot_table_init() and acpi_boot_init() 1481 * called from setup_arch(), always. 1482 * 1. checksums all tables 1483 * 2. enumerates lapics 1484 * 3. enumerates io-apics 1485 * 1486 * acpi_table_init() is separate to allow reading SRAT without 1487 * other side effects. 1488 * 1489 * side effects of acpi_boot_init: 1490 * acpi_lapic = 1 if LAPIC found 1491 * acpi_ioapic = 1 if IOAPIC found 1492 * if (acpi_lapic && acpi_ioapic) smp_found_config = 1; 1493 * if acpi_blacklisted() acpi_disabled = 1; 1494 * acpi_irq_model=... 1495 * ... 1496 */ 1497 1498 void __init acpi_boot_table_init(void) 1499 { 1500 dmi_check_system(acpi_dmi_table); 1501 1502 /* 1503 * If acpi_disabled, bail out 1504 * One exception: acpi=ht continues far enough to enumerate LAPICs 1505 */ 1506 if (acpi_disabled && !acpi_ht) 1507 return; 1508 1509 /* 1510 * Initialize the ACPI boot-time table parser. 1511 */ 1512 if (acpi_table_init()) { 1513 disable_acpi(); 1514 return; 1515 } 1516 1517 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf); 1518 1519 /* 1520 * blacklist may disable ACPI entirely 1521 */ 1522 if (acpi_blacklisted()) { 1523 if (acpi_force) { 1524 printk(KERN_WARNING PREFIX "acpi=force override\n"); 1525 } else { 1526 printk(KERN_WARNING PREFIX "Disabling ACPI support\n"); 1527 disable_acpi(); 1528 return; 1529 } 1530 } 1531 } 1532 1533 int __init early_acpi_boot_init(void) 1534 { 1535 /* 1536 * If acpi_disabled, bail out 1537 * One exception: acpi=ht continues far enough to enumerate LAPICs 1538 */ 1539 if (acpi_disabled && !acpi_ht) 1540 return 1; 1541 1542 /* 1543 * Process the Multiple APIC Description Table (MADT), if present 1544 */ 1545 early_acpi_process_madt(); 1546 1547 return 0; 1548 } 1549 1550 int __init acpi_boot_init(void) 1551 { 1552 /* those are executed after early-quirks are executed */ 1553 dmi_check_system(acpi_dmi_table_late); 1554 1555 /* 1556 * If acpi_disabled, bail out 1557 * One exception: acpi=ht continues far enough to enumerate LAPICs 1558 */ 1559 if (acpi_disabled && !acpi_ht) 1560 return 1; 1561 1562 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf); 1563 1564 /* 1565 * set sci_int and PM timer address 1566 */ 1567 acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt); 1568 1569 /* 1570 * Process the Multiple APIC Description Table (MADT), if present 1571 */ 1572 acpi_process_madt(); 1573 1574 acpi_table_parse(ACPI_SIG_HPET, acpi_parse_hpet); 1575 1576 if (!acpi_noirq) 1577 x86_init.pci.init = pci_acpi_init; 1578 1579 return 0; 1580 } 1581 1582 static int __init parse_acpi(char *arg) 1583 { 1584 if (!arg) 1585 return -EINVAL; 1586 1587 /* "acpi=off" disables both ACPI table parsing and interpreter */ 1588 if (strcmp(arg, "off") == 0) { 1589 disable_acpi(); 1590 } 1591 /* acpi=force to over-ride black-list */ 1592 else if (strcmp(arg, "force") == 0) { 1593 acpi_force = 1; 1594 acpi_ht = 1; 1595 acpi_disabled = 0; 1596 } 1597 /* acpi=strict disables out-of-spec workarounds */ 1598 else if (strcmp(arg, "strict") == 0) { 1599 acpi_strict = 1; 1600 } 1601 /* Limit ACPI just to boot-time to enable HT */ 1602 else if (strcmp(arg, "ht") == 0) { 1603 if (!acpi_force) { 1604 printk(KERN_WARNING "acpi=ht will be removed in Linux-2.6.35\n"); 1605 disable_acpi(); 1606 } 1607 acpi_ht = 1; 1608 } 1609 /* acpi=rsdt use RSDT instead of XSDT */ 1610 else if (strcmp(arg, "rsdt") == 0) { 1611 acpi_rsdt_forced = 1; 1612 } 1613 /* "acpi=noirq" disables ACPI interrupt routing */ 1614 else if (strcmp(arg, "noirq") == 0) { 1615 acpi_noirq_set(); 1616 } 1617 /* "acpi=copy_dsdt" copys DSDT */ 1618 else if (strcmp(arg, "copy_dsdt") == 0) { 1619 acpi_gbl_copy_dsdt_locally = 1; 1620 } else { 1621 /* Core will printk when we return error. */ 1622 return -EINVAL; 1623 } 1624 return 0; 1625 } 1626 early_param("acpi", parse_acpi); 1627 1628 /* FIXME: Using pci= for an ACPI parameter is a travesty. */ 1629 static int __init parse_pci(char *arg) 1630 { 1631 if (arg && strcmp(arg, "noacpi") == 0) 1632 acpi_disable_pci(); 1633 return 0; 1634 } 1635 early_param("pci", parse_pci); 1636 1637 int __init acpi_mps_check(void) 1638 { 1639 #if defined(CONFIG_X86_LOCAL_APIC) && !defined(CONFIG_X86_MPPARSE) 1640 /* mptable code is not built-in*/ 1641 if (acpi_disabled || acpi_noirq) { 1642 printk(KERN_WARNING "MPS support code is not built-in.\n" 1643 "Using acpi=off or acpi=noirq or pci=noacpi " 1644 "may have problem\n"); 1645 return 1; 1646 } 1647 #endif 1648 return 0; 1649 } 1650 1651 #ifdef CONFIG_X86_IO_APIC 1652 static int __init parse_acpi_skip_timer_override(char *arg) 1653 { 1654 acpi_skip_timer_override = 1; 1655 return 0; 1656 } 1657 early_param("acpi_skip_timer_override", parse_acpi_skip_timer_override); 1658 1659 static int __init parse_acpi_use_timer_override(char *arg) 1660 { 1661 acpi_use_timer_override = 1; 1662 return 0; 1663 } 1664 early_param("acpi_use_timer_override", parse_acpi_use_timer_override); 1665 #endif /* CONFIG_X86_IO_APIC */ 1666 1667 static int __init setup_acpi_sci(char *s) 1668 { 1669 if (!s) 1670 return -EINVAL; 1671 if (!strcmp(s, "edge")) 1672 acpi_sci_flags = ACPI_MADT_TRIGGER_EDGE | 1673 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK); 1674 else if (!strcmp(s, "level")) 1675 acpi_sci_flags = ACPI_MADT_TRIGGER_LEVEL | 1676 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK); 1677 else if (!strcmp(s, "high")) 1678 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_HIGH | 1679 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK); 1680 else if (!strcmp(s, "low")) 1681 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_LOW | 1682 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK); 1683 else 1684 return -EINVAL; 1685 return 0; 1686 } 1687 early_param("acpi_sci", setup_acpi_sci); 1688 1689 int __acpi_acquire_global_lock(unsigned int *lock) 1690 { 1691 unsigned int old, new, val; 1692 do { 1693 old = *lock; 1694 new = (((old & ~0x3) + 2) + ((old >> 1) & 0x1)); 1695 val = cmpxchg(lock, old, new); 1696 } while (unlikely (val != old)); 1697 return (new < 3) ? -1 : 0; 1698 } 1699 1700 int __acpi_release_global_lock(unsigned int *lock) 1701 { 1702 unsigned int old, new, val; 1703 do { 1704 old = *lock; 1705 new = old & ~0x3; 1706 val = cmpxchg(lock, old, new); 1707 } while (unlikely (val != old)); 1708 return old & 0x1; 1709 } 1710