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/bootmem.h> 35 #include <linux/ioport.h> 36 37 #include <asm/pgtable.h> 38 #include <asm/io_apic.h> 39 #include <asm/apic.h> 40 #include <asm/io.h> 41 #include <asm/mpspec.h> 42 #include <asm/smp.h> 43 44 static int __initdata acpi_force = 0; 45 u32 acpi_rsdt_forced; 46 #ifdef CONFIG_ACPI 47 int acpi_disabled = 0; 48 #else 49 int acpi_disabled = 1; 50 #endif 51 EXPORT_SYMBOL(acpi_disabled); 52 53 #ifdef CONFIG_X86_64 54 # include <asm/proto.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 * Temporarily use the virtual area starting from FIX_IO_APIC_BASE_END, 98 * to map the target physical address. The problem is that set_fixmap() 99 * provides a single page, and it is possible that the page is not 100 * sufficient. 101 * By using this area, we can map up to MAX_IO_APICS pages temporarily, 102 * i.e. until the next __va_range() call. 103 * 104 * Important Safety Note: The fixed I/O APIC page numbers are *subtracted* 105 * from the fixed base. That's why we start at FIX_IO_APIC_BASE_END and 106 * count idx down while incrementing the phys address. 107 */ 108 char *__init __acpi_map_table(unsigned long phys, unsigned long size) 109 { 110 111 if (!phys || !size) 112 return NULL; 113 114 return early_ioremap(phys, size); 115 } 116 void __init __acpi_unmap_table(char *map, unsigned long size) 117 { 118 if (!map || !size) 119 return; 120 121 early_iounmap(map, size); 122 } 123 124 #ifdef CONFIG_PCI_MMCONFIG 125 126 static int acpi_mcfg_64bit_base_addr __initdata = FALSE; 127 128 /* The physical address of the MMCONFIG aperture. Set from ACPI tables. */ 129 struct acpi_mcfg_allocation *pci_mmcfg_config; 130 int pci_mmcfg_config_num; 131 132 static int __init acpi_mcfg_oem_check(struct acpi_table_mcfg *mcfg) 133 { 134 if (!strcmp(mcfg->header.oem_id, "SGI")) 135 acpi_mcfg_64bit_base_addr = TRUE; 136 137 return 0; 138 } 139 140 int __init acpi_parse_mcfg(struct acpi_table_header *header) 141 { 142 struct acpi_table_mcfg *mcfg; 143 unsigned long i; 144 int config_size; 145 146 if (!header) 147 return -EINVAL; 148 149 mcfg = (struct acpi_table_mcfg *)header; 150 151 /* how many config structures do we have */ 152 pci_mmcfg_config_num = 0; 153 i = header->length - sizeof(struct acpi_table_mcfg); 154 while (i >= sizeof(struct acpi_mcfg_allocation)) { 155 ++pci_mmcfg_config_num; 156 i -= sizeof(struct acpi_mcfg_allocation); 157 }; 158 if (pci_mmcfg_config_num == 0) { 159 printk(KERN_ERR PREFIX "MMCONFIG has no entries\n"); 160 return -ENODEV; 161 } 162 163 config_size = pci_mmcfg_config_num * sizeof(*pci_mmcfg_config); 164 pci_mmcfg_config = kmalloc(config_size, GFP_KERNEL); 165 if (!pci_mmcfg_config) { 166 printk(KERN_WARNING PREFIX 167 "No memory for MCFG config tables\n"); 168 return -ENOMEM; 169 } 170 171 memcpy(pci_mmcfg_config, &mcfg[1], config_size); 172 173 acpi_mcfg_oem_check(mcfg); 174 175 for (i = 0; i < pci_mmcfg_config_num; ++i) { 176 if ((pci_mmcfg_config[i].address > 0xFFFFFFFF) && 177 !acpi_mcfg_64bit_base_addr) { 178 printk(KERN_ERR PREFIX 179 "MMCONFIG not in low 4GB of memory\n"); 180 kfree(pci_mmcfg_config); 181 pci_mmcfg_config_num = 0; 182 return -ENODEV; 183 } 184 } 185 186 return 0; 187 } 188 #endif /* CONFIG_PCI_MMCONFIG */ 189 190 #ifdef CONFIG_X86_LOCAL_APIC 191 static int __init acpi_parse_madt(struct acpi_table_header *table) 192 { 193 struct acpi_table_madt *madt = NULL; 194 195 if (!cpu_has_apic) 196 return -EINVAL; 197 198 madt = (struct acpi_table_madt *)table; 199 if (!madt) { 200 printk(KERN_WARNING PREFIX "Unable to map MADT\n"); 201 return -ENODEV; 202 } 203 204 if (madt->address) { 205 acpi_lapic_addr = (u64) madt->address; 206 207 printk(KERN_DEBUG PREFIX "Local APIC address 0x%08x\n", 208 madt->address); 209 } 210 211 default_acpi_madt_oem_check(madt->header.oem_id, 212 madt->header.oem_table_id); 213 214 return 0; 215 } 216 217 static void __cpuinit acpi_register_lapic(int id, u8 enabled) 218 { 219 unsigned int ver = 0; 220 221 if (!enabled) { 222 ++disabled_cpus; 223 return; 224 } 225 226 if (boot_cpu_physical_apicid != -1U) 227 ver = apic_version[boot_cpu_physical_apicid]; 228 229 generic_processor_info(id, ver); 230 } 231 232 static int __init 233 acpi_parse_x2apic(struct acpi_subtable_header *header, const unsigned long end) 234 { 235 struct acpi_madt_local_x2apic *processor = NULL; 236 237 processor = (struct acpi_madt_local_x2apic *)header; 238 239 if (BAD_MADT_ENTRY(processor, end)) 240 return -EINVAL; 241 242 acpi_table_print_madt_entry(header); 243 244 #ifdef CONFIG_X86_X2APIC 245 /* 246 * We need to register disabled CPU as well to permit 247 * counting disabled CPUs. This allows us to size 248 * cpus_possible_map more accurately, to permit 249 * to not preallocating memory for all NR_CPUS 250 * when we use CPU hotplug. 251 */ 252 acpi_register_lapic(processor->local_apic_id, /* APIC ID */ 253 processor->lapic_flags & ACPI_MADT_ENABLED); 254 #else 255 printk(KERN_WARNING PREFIX "x2apic entry ignored\n"); 256 #endif 257 258 return 0; 259 } 260 261 static int __init 262 acpi_parse_lapic(struct acpi_subtable_header * header, const unsigned long end) 263 { 264 struct acpi_madt_local_apic *processor = NULL; 265 266 processor = (struct acpi_madt_local_apic *)header; 267 268 if (BAD_MADT_ENTRY(processor, end)) 269 return -EINVAL; 270 271 acpi_table_print_madt_entry(header); 272 273 /* 274 * We need to register disabled CPU as well to permit 275 * counting disabled CPUs. This allows us to size 276 * cpus_possible_map more accurately, to permit 277 * to not preallocating memory for all NR_CPUS 278 * when we use CPU hotplug. 279 */ 280 acpi_register_lapic(processor->id, /* APIC ID */ 281 processor->lapic_flags & ACPI_MADT_ENABLED); 282 283 return 0; 284 } 285 286 static int __init 287 acpi_parse_sapic(struct acpi_subtable_header *header, const unsigned long end) 288 { 289 struct acpi_madt_local_sapic *processor = NULL; 290 291 processor = (struct acpi_madt_local_sapic *)header; 292 293 if (BAD_MADT_ENTRY(processor, end)) 294 return -EINVAL; 295 296 acpi_table_print_madt_entry(header); 297 298 acpi_register_lapic((processor->id << 8) | processor->eid,/* APIC ID */ 299 processor->lapic_flags & ACPI_MADT_ENABLED); 300 301 return 0; 302 } 303 304 static int __init 305 acpi_parse_lapic_addr_ovr(struct acpi_subtable_header * header, 306 const unsigned long end) 307 { 308 struct acpi_madt_local_apic_override *lapic_addr_ovr = NULL; 309 310 lapic_addr_ovr = (struct acpi_madt_local_apic_override *)header; 311 312 if (BAD_MADT_ENTRY(lapic_addr_ovr, end)) 313 return -EINVAL; 314 315 acpi_lapic_addr = lapic_addr_ovr->address; 316 317 return 0; 318 } 319 320 static int __init 321 acpi_parse_x2apic_nmi(struct acpi_subtable_header *header, 322 const unsigned long end) 323 { 324 struct acpi_madt_local_x2apic_nmi *x2apic_nmi = NULL; 325 326 x2apic_nmi = (struct acpi_madt_local_x2apic_nmi *)header; 327 328 if (BAD_MADT_ENTRY(x2apic_nmi, end)) 329 return -EINVAL; 330 331 acpi_table_print_madt_entry(header); 332 333 if (x2apic_nmi->lint != 1) 334 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n"); 335 336 return 0; 337 } 338 339 static int __init 340 acpi_parse_lapic_nmi(struct acpi_subtable_header * header, const unsigned long end) 341 { 342 struct acpi_madt_local_apic_nmi *lapic_nmi = NULL; 343 344 lapic_nmi = (struct acpi_madt_local_apic_nmi *)header; 345 346 if (BAD_MADT_ENTRY(lapic_nmi, end)) 347 return -EINVAL; 348 349 acpi_table_print_madt_entry(header); 350 351 if (lapic_nmi->lint != 1) 352 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n"); 353 354 return 0; 355 } 356 357 #endif /*CONFIG_X86_LOCAL_APIC */ 358 359 #ifdef CONFIG_X86_IO_APIC 360 361 static int __init 362 acpi_parse_ioapic(struct acpi_subtable_header * header, const unsigned long end) 363 { 364 struct acpi_madt_io_apic *ioapic = NULL; 365 366 ioapic = (struct acpi_madt_io_apic *)header; 367 368 if (BAD_MADT_ENTRY(ioapic, end)) 369 return -EINVAL; 370 371 acpi_table_print_madt_entry(header); 372 373 mp_register_ioapic(ioapic->id, 374 ioapic->address, ioapic->global_irq_base); 375 376 return 0; 377 } 378 379 /* 380 * Parse Interrupt Source Override for the ACPI SCI 381 */ 382 static void __init acpi_sci_ioapic_setup(u32 gsi, u16 polarity, u16 trigger) 383 { 384 if (trigger == 0) /* compatible SCI trigger is level */ 385 trigger = 3; 386 387 if (polarity == 0) /* compatible SCI polarity is low */ 388 polarity = 3; 389 390 /* Command-line over-ride via acpi_sci= */ 391 if (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) 392 trigger = (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2; 393 394 if (acpi_sci_flags & ACPI_MADT_POLARITY_MASK) 395 polarity = acpi_sci_flags & ACPI_MADT_POLARITY_MASK; 396 397 /* 398 * mp_config_acpi_legacy_irqs() already setup IRQs < 16 399 * If GSI is < 16, this will update its flags, 400 * else it will create a new mp_irqs[] entry. 401 */ 402 mp_override_legacy_irq(gsi, polarity, trigger, gsi); 403 404 /* 405 * stash over-ride to indicate we've been here 406 * and for later update of acpi_gbl_FADT 407 */ 408 acpi_sci_override_gsi = gsi; 409 return; 410 } 411 412 static int __init 413 acpi_parse_int_src_ovr(struct acpi_subtable_header * header, 414 const unsigned long end) 415 { 416 struct acpi_madt_interrupt_override *intsrc = NULL; 417 418 intsrc = (struct acpi_madt_interrupt_override *)header; 419 420 if (BAD_MADT_ENTRY(intsrc, end)) 421 return -EINVAL; 422 423 acpi_table_print_madt_entry(header); 424 425 if (intsrc->source_irq == acpi_gbl_FADT.sci_interrupt) { 426 acpi_sci_ioapic_setup(intsrc->global_irq, 427 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK, 428 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2); 429 return 0; 430 } 431 432 if (acpi_skip_timer_override && 433 intsrc->source_irq == 0 && intsrc->global_irq == 2) { 434 printk(PREFIX "BIOS IRQ0 pin2 override ignored.\n"); 435 return 0; 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; 518 return 0; 519 } 520 521 /* 522 * success: return IRQ number (>=0) 523 * failure: return < 0 524 */ 525 int acpi_register_gsi(u32 gsi, int triggering, int polarity) 526 { 527 unsigned int irq; 528 unsigned int plat_gsi = gsi; 529 530 #ifdef CONFIG_PCI 531 /* 532 * Make sure all (legacy) PCI IRQs are set as level-triggered. 533 */ 534 if (acpi_irq_model == ACPI_IRQ_MODEL_PIC) { 535 if (triggering == ACPI_LEVEL_SENSITIVE) 536 eisa_set_level_irq(gsi); 537 } 538 #endif 539 540 #ifdef CONFIG_X86_IO_APIC 541 if (acpi_irq_model == ACPI_IRQ_MODEL_IOAPIC) { 542 plat_gsi = mp_register_gsi(gsi, triggering, polarity); 543 } 544 #endif 545 acpi_gsi_to_irq(plat_gsi, &irq); 546 return irq; 547 } 548 549 /* 550 * ACPI based hotplug support for CPU 551 */ 552 #ifdef CONFIG_ACPI_HOTPLUG_CPU 553 554 static int __cpuinit _acpi_map_lsapic(acpi_handle handle, int *pcpu) 555 { 556 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; 557 union acpi_object *obj; 558 struct acpi_madt_local_apic *lapic; 559 cpumask_var_t tmp_map, new_map; 560 u8 physid; 561 int cpu; 562 int retval = -ENOMEM; 563 564 if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer))) 565 return -EINVAL; 566 567 if (!buffer.length || !buffer.pointer) 568 return -EINVAL; 569 570 obj = buffer.pointer; 571 if (obj->type != ACPI_TYPE_BUFFER || 572 obj->buffer.length < sizeof(*lapic)) { 573 kfree(buffer.pointer); 574 return -EINVAL; 575 } 576 577 lapic = (struct acpi_madt_local_apic *)obj->buffer.pointer; 578 579 if (lapic->header.type != ACPI_MADT_TYPE_LOCAL_APIC || 580 !(lapic->lapic_flags & ACPI_MADT_ENABLED)) { 581 kfree(buffer.pointer); 582 return -EINVAL; 583 } 584 585 physid = lapic->id; 586 587 kfree(buffer.pointer); 588 buffer.length = ACPI_ALLOCATE_BUFFER; 589 buffer.pointer = NULL; 590 591 if (!alloc_cpumask_var(&tmp_map, GFP_KERNEL)) 592 goto out; 593 594 if (!alloc_cpumask_var(&new_map, GFP_KERNEL)) 595 goto free_tmp_map; 596 597 cpumask_copy(tmp_map, cpu_present_mask); 598 acpi_register_lapic(physid, lapic->lapic_flags & ACPI_MADT_ENABLED); 599 600 /* 601 * If mp_register_lapic successfully generates a new logical cpu 602 * number, then the following will get us exactly what was mapped 603 */ 604 cpumask_andnot(new_map, cpu_present_mask, tmp_map); 605 if (cpumask_empty(new_map)) { 606 printk ("Unable to map lapic to logical cpu number\n"); 607 retval = -EINVAL; 608 goto free_new_map; 609 } 610 611 cpu = cpumask_first(new_map); 612 613 *pcpu = cpu; 614 retval = 0; 615 616 free_new_map: 617 free_cpumask_var(new_map); 618 free_tmp_map: 619 free_cpumask_var(tmp_map); 620 out: 621 return retval; 622 } 623 624 /* wrapper to silence section mismatch warning */ 625 int __ref acpi_map_lsapic(acpi_handle handle, int *pcpu) 626 { 627 return _acpi_map_lsapic(handle, pcpu); 628 } 629 EXPORT_SYMBOL(acpi_map_lsapic); 630 631 int acpi_unmap_lsapic(int cpu) 632 { 633 per_cpu(x86_cpu_to_apicid, cpu) = -1; 634 set_cpu_present(cpu, false); 635 num_processors--; 636 637 return (0); 638 } 639 640 EXPORT_SYMBOL(acpi_unmap_lsapic); 641 #endif /* CONFIG_ACPI_HOTPLUG_CPU */ 642 643 int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base) 644 { 645 /* TBD */ 646 return -EINVAL; 647 } 648 649 EXPORT_SYMBOL(acpi_register_ioapic); 650 651 int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base) 652 { 653 /* TBD */ 654 return -EINVAL; 655 } 656 657 EXPORT_SYMBOL(acpi_unregister_ioapic); 658 659 static int __init acpi_parse_sbf(struct acpi_table_header *table) 660 { 661 struct acpi_table_boot *sb; 662 663 sb = (struct acpi_table_boot *)table; 664 if (!sb) { 665 printk(KERN_WARNING PREFIX "Unable to map SBF\n"); 666 return -ENODEV; 667 } 668 669 sbf_port = sb->cmos_index; /* Save CMOS port */ 670 671 return 0; 672 } 673 674 #ifdef CONFIG_HPET_TIMER 675 #include <asm/hpet.h> 676 677 static struct __initdata resource *hpet_res; 678 679 static int __init acpi_parse_hpet(struct acpi_table_header *table) 680 { 681 struct acpi_table_hpet *hpet_tbl; 682 683 hpet_tbl = (struct acpi_table_hpet *)table; 684 if (!hpet_tbl) { 685 printk(KERN_WARNING PREFIX "Unable to map HPET\n"); 686 return -ENODEV; 687 } 688 689 if (hpet_tbl->address.space_id != ACPI_SPACE_MEM) { 690 printk(KERN_WARNING PREFIX "HPET timers must be located in " 691 "memory.\n"); 692 return -1; 693 } 694 695 hpet_address = hpet_tbl->address.address; 696 697 /* 698 * Some broken BIOSes advertise HPET at 0x0. We really do not 699 * want to allocate a resource there. 700 */ 701 if (!hpet_address) { 702 printk(KERN_WARNING PREFIX 703 "HPET id: %#x base: %#lx is invalid\n", 704 hpet_tbl->id, hpet_address); 705 return 0; 706 } 707 #ifdef CONFIG_X86_64 708 /* 709 * Some even more broken BIOSes advertise HPET at 710 * 0xfed0000000000000 instead of 0xfed00000. Fix it up and add 711 * some noise: 712 */ 713 if (hpet_address == 0xfed0000000000000UL) { 714 if (!hpet_force_user) { 715 printk(KERN_WARNING PREFIX "HPET id: %#x " 716 "base: 0xfed0000000000000 is bogus\n " 717 "try hpet=force on the kernel command line to " 718 "fix it up to 0xfed00000.\n", hpet_tbl->id); 719 hpet_address = 0; 720 return 0; 721 } 722 printk(KERN_WARNING PREFIX 723 "HPET id: %#x base: 0xfed0000000000000 fixed up " 724 "to 0xfed00000.\n", hpet_tbl->id); 725 hpet_address >>= 32; 726 } 727 #endif 728 printk(KERN_INFO PREFIX "HPET id: %#x base: %#lx\n", 729 hpet_tbl->id, hpet_address); 730 731 /* 732 * Allocate and initialize the HPET firmware resource for adding into 733 * the resource tree during the lateinit timeframe. 734 */ 735 #define HPET_RESOURCE_NAME_SIZE 9 736 hpet_res = alloc_bootmem(sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE); 737 738 hpet_res->name = (void *)&hpet_res[1]; 739 hpet_res->flags = IORESOURCE_MEM; 740 snprintf((char *)hpet_res->name, HPET_RESOURCE_NAME_SIZE, "HPET %u", 741 hpet_tbl->sequence); 742 743 hpet_res->start = hpet_address; 744 hpet_res->end = hpet_address + (1 * 1024) - 1; 745 746 return 0; 747 } 748 749 /* 750 * hpet_insert_resource inserts the HPET resources used into the resource 751 * tree. 752 */ 753 static __init int hpet_insert_resource(void) 754 { 755 if (!hpet_res) 756 return 1; 757 758 return insert_resource(&iomem_resource, hpet_res); 759 } 760 761 late_initcall(hpet_insert_resource); 762 763 #else 764 #define acpi_parse_hpet NULL 765 #endif 766 767 static int __init acpi_parse_fadt(struct acpi_table_header *table) 768 { 769 770 #ifdef CONFIG_X86_PM_TIMER 771 /* detect the location of the ACPI PM Timer */ 772 if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID) { 773 /* FADT rev. 2 */ 774 if (acpi_gbl_FADT.xpm_timer_block.space_id != 775 ACPI_ADR_SPACE_SYSTEM_IO) 776 return 0; 777 778 pmtmr_ioport = acpi_gbl_FADT.xpm_timer_block.address; 779 /* 780 * "X" fields are optional extensions to the original V1.0 781 * fields, so we must selectively expand V1.0 fields if the 782 * corresponding X field is zero. 783 */ 784 if (!pmtmr_ioport) 785 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block; 786 } else { 787 /* FADT rev. 1 */ 788 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block; 789 } 790 if (pmtmr_ioport) 791 printk(KERN_INFO PREFIX "PM-Timer IO Port: %#x\n", 792 pmtmr_ioport); 793 #endif 794 return 0; 795 } 796 797 #ifdef CONFIG_X86_LOCAL_APIC 798 /* 799 * Parse LAPIC entries in MADT 800 * returns 0 on success, < 0 on error 801 */ 802 803 static void __init acpi_register_lapic_address(unsigned long address) 804 { 805 mp_lapic_addr = address; 806 807 set_fixmap_nocache(FIX_APIC_BASE, address); 808 if (boot_cpu_physical_apicid == -1U) { 809 boot_cpu_physical_apicid = read_apic_id(); 810 apic_version[boot_cpu_physical_apicid] = 811 GET_APIC_VERSION(apic_read(APIC_LVR)); 812 } 813 } 814 815 static int __init early_acpi_parse_madt_lapic_addr_ovr(void) 816 { 817 int count; 818 819 if (!cpu_has_apic) 820 return -ENODEV; 821 822 /* 823 * Note that the LAPIC address is obtained from the MADT (32-bit value) 824 * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value). 825 */ 826 827 count = 828 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE, 829 acpi_parse_lapic_addr_ovr, 0); 830 if (count < 0) { 831 printk(KERN_ERR PREFIX 832 "Error parsing LAPIC address override entry\n"); 833 return count; 834 } 835 836 acpi_register_lapic_address(acpi_lapic_addr); 837 838 return count; 839 } 840 841 static int __init acpi_parse_madt_lapic_entries(void) 842 { 843 int count; 844 int x2count = 0; 845 846 if (!cpu_has_apic) 847 return -ENODEV; 848 849 /* 850 * Note that the LAPIC address is obtained from the MADT (32-bit value) 851 * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value). 852 */ 853 854 count = 855 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE, 856 acpi_parse_lapic_addr_ovr, 0); 857 if (count < 0) { 858 printk(KERN_ERR PREFIX 859 "Error parsing LAPIC address override entry\n"); 860 return count; 861 } 862 863 acpi_register_lapic_address(acpi_lapic_addr); 864 865 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC, 866 acpi_parse_sapic, MAX_APICS); 867 868 if (!count) { 869 x2count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC, 870 acpi_parse_x2apic, MAX_APICS); 871 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC, 872 acpi_parse_lapic, MAX_APICS); 873 } 874 if (!count && !x2count) { 875 printk(KERN_ERR PREFIX "No LAPIC entries present\n"); 876 /* TBD: Cleanup to allow fallback to MPS */ 877 return -ENODEV; 878 } else if (count < 0 || x2count < 0) { 879 printk(KERN_ERR PREFIX "Error parsing LAPIC entry\n"); 880 /* TBD: Cleanup to allow fallback to MPS */ 881 return count; 882 } 883 884 x2count = 885 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC_NMI, 886 acpi_parse_x2apic_nmi, 0); 887 count = 888 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI, acpi_parse_lapic_nmi, 0); 889 if (count < 0 || x2count < 0) { 890 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n"); 891 /* TBD: Cleanup to allow fallback to MPS */ 892 return count; 893 } 894 return 0; 895 } 896 #endif /* CONFIG_X86_LOCAL_APIC */ 897 898 #ifdef CONFIG_X86_IO_APIC 899 #define MP_ISA_BUS 0 900 901 #ifdef CONFIG_X86_ES7000 902 extern int es7000_plat; 903 #endif 904 905 static struct { 906 int apic_id; 907 int gsi_base; 908 int gsi_end; 909 DECLARE_BITMAP(pin_programmed, MP_MAX_IOAPIC_PIN + 1); 910 } mp_ioapic_routing[MAX_IO_APICS]; 911 912 int mp_find_ioapic(int gsi) 913 { 914 int i = 0; 915 916 /* Find the IOAPIC that manages this GSI. */ 917 for (i = 0; i < nr_ioapics; i++) { 918 if ((gsi >= mp_ioapic_routing[i].gsi_base) 919 && (gsi <= mp_ioapic_routing[i].gsi_end)) 920 return i; 921 } 922 923 printk(KERN_ERR "ERROR: Unable to locate IOAPIC for GSI %d\n", gsi); 924 return -1; 925 } 926 927 int mp_find_ioapic_pin(int ioapic, int gsi) 928 { 929 if (WARN_ON(ioapic == -1)) 930 return -1; 931 if (WARN_ON(gsi > mp_ioapic_routing[ioapic].gsi_end)) 932 return -1; 933 934 return gsi - mp_ioapic_routing[ioapic].gsi_base; 935 } 936 937 static u8 __init uniq_ioapic_id(u8 id) 938 { 939 #ifdef CONFIG_X86_32 940 if ((boot_cpu_data.x86_vendor == X86_VENDOR_INTEL) && 941 !APIC_XAPIC(apic_version[boot_cpu_physical_apicid])) 942 return io_apic_get_unique_id(nr_ioapics, id); 943 else 944 return id; 945 #else 946 int i; 947 DECLARE_BITMAP(used, 256); 948 bitmap_zero(used, 256); 949 for (i = 0; i < nr_ioapics; i++) { 950 struct mpc_ioapic *ia = &mp_ioapics[i]; 951 __set_bit(ia->apicid, used); 952 } 953 if (!test_bit(id, used)) 954 return id; 955 return find_first_zero_bit(used, 256); 956 #endif 957 } 958 959 static int bad_ioapic(unsigned long address) 960 { 961 if (nr_ioapics >= MAX_IO_APICS) { 962 printk(KERN_ERR "ERROR: Max # of I/O APICs (%d) exceeded " 963 "(found %d)\n", MAX_IO_APICS, nr_ioapics); 964 panic("Recompile kernel with bigger MAX_IO_APICS!\n"); 965 } 966 if (!address) { 967 printk(KERN_ERR "WARNING: Bogus (zero) I/O APIC address" 968 " found in table, skipping!\n"); 969 return 1; 970 } 971 return 0; 972 } 973 974 void __init mp_register_ioapic(int id, u32 address, u32 gsi_base) 975 { 976 int idx = 0; 977 978 if (bad_ioapic(address)) 979 return; 980 981 idx = nr_ioapics; 982 983 mp_ioapics[idx].type = MP_IOAPIC; 984 mp_ioapics[idx].flags = MPC_APIC_USABLE; 985 mp_ioapics[idx].apicaddr = address; 986 987 set_fixmap_nocache(FIX_IO_APIC_BASE_0 + idx, address); 988 mp_ioapics[idx].apicid = uniq_ioapic_id(id); 989 #ifdef CONFIG_X86_32 990 mp_ioapics[idx].apicver = io_apic_get_version(idx); 991 #else 992 mp_ioapics[idx].apicver = 0; 993 #endif 994 /* 995 * Build basic GSI lookup table to facilitate gsi->io_apic lookups 996 * and to prevent reprogramming of IOAPIC pins (PCI GSIs). 997 */ 998 mp_ioapic_routing[idx].apic_id = mp_ioapics[idx].apicid; 999 mp_ioapic_routing[idx].gsi_base = gsi_base; 1000 mp_ioapic_routing[idx].gsi_end = gsi_base + 1001 io_apic_get_redir_entries(idx); 1002 1003 printk(KERN_INFO "IOAPIC[%d]: apic_id %d, version %d, address 0x%x, " 1004 "GSI %d-%d\n", idx, mp_ioapics[idx].apicid, 1005 mp_ioapics[idx].apicver, mp_ioapics[idx].apicaddr, 1006 mp_ioapic_routing[idx].gsi_base, mp_ioapic_routing[idx].gsi_end); 1007 1008 nr_ioapics++; 1009 } 1010 1011 int __init acpi_probe_gsi(void) 1012 { 1013 int idx; 1014 int gsi; 1015 int max_gsi = 0; 1016 1017 if (acpi_disabled) 1018 return 0; 1019 1020 if (!acpi_ioapic) 1021 return 0; 1022 1023 max_gsi = 0; 1024 for (idx = 0; idx < nr_ioapics; idx++) { 1025 gsi = mp_ioapic_routing[idx].gsi_end; 1026 1027 if (gsi > max_gsi) 1028 max_gsi = gsi; 1029 } 1030 1031 return max_gsi + 1; 1032 } 1033 1034 static void assign_to_mp_irq(struct mpc_intsrc *m, 1035 struct mpc_intsrc *mp_irq) 1036 { 1037 memcpy(mp_irq, m, sizeof(struct mpc_intsrc)); 1038 } 1039 1040 static int mp_irq_cmp(struct mpc_intsrc *mp_irq, 1041 struct mpc_intsrc *m) 1042 { 1043 return memcmp(mp_irq, m, sizeof(struct mpc_intsrc)); 1044 } 1045 1046 static void save_mp_irq(struct mpc_intsrc *m) 1047 { 1048 int i; 1049 1050 for (i = 0; i < mp_irq_entries; i++) { 1051 if (!mp_irq_cmp(&mp_irqs[i], m)) 1052 return; 1053 } 1054 1055 assign_to_mp_irq(m, &mp_irqs[mp_irq_entries]); 1056 if (++mp_irq_entries == MAX_IRQ_SOURCES) 1057 panic("Max # of irq sources exceeded!!\n"); 1058 } 1059 1060 void __init mp_override_legacy_irq(u8 bus_irq, u8 polarity, u8 trigger, u32 gsi) 1061 { 1062 int ioapic; 1063 int pin; 1064 struct mpc_intsrc mp_irq; 1065 1066 /* 1067 * Convert 'gsi' to 'ioapic.pin'. 1068 */ 1069 ioapic = mp_find_ioapic(gsi); 1070 if (ioapic < 0) 1071 return; 1072 pin = mp_find_ioapic_pin(ioapic, gsi); 1073 1074 /* 1075 * TBD: This check is for faulty timer entries, where the override 1076 * erroneously sets the trigger to level, resulting in a HUGE 1077 * increase of timer interrupts! 1078 */ 1079 if ((bus_irq == 0) && (trigger == 3)) 1080 trigger = 1; 1081 1082 mp_irq.type = MP_INTSRC; 1083 mp_irq.irqtype = mp_INT; 1084 mp_irq.irqflag = (trigger << 2) | polarity; 1085 mp_irq.srcbus = MP_ISA_BUS; 1086 mp_irq.srcbusirq = bus_irq; /* IRQ */ 1087 mp_irq.dstapic = mp_ioapics[ioapic].apicid; /* APIC ID */ 1088 mp_irq.dstirq = pin; /* INTIN# */ 1089 1090 save_mp_irq(&mp_irq); 1091 } 1092 1093 void __init mp_config_acpi_legacy_irqs(void) 1094 { 1095 int i; 1096 int ioapic; 1097 unsigned int dstapic; 1098 struct mpc_intsrc mp_irq; 1099 1100 #if defined (CONFIG_MCA) || defined (CONFIG_EISA) 1101 /* 1102 * Fabricate the legacy ISA bus (bus #31). 1103 */ 1104 mp_bus_id_to_type[MP_ISA_BUS] = MP_BUS_ISA; 1105 #endif 1106 set_bit(MP_ISA_BUS, mp_bus_not_pci); 1107 pr_debug("Bus #%d is ISA\n", MP_ISA_BUS); 1108 1109 #ifdef CONFIG_X86_ES7000 1110 /* 1111 * Older generations of ES7000 have no legacy identity mappings 1112 */ 1113 if (es7000_plat == 1) 1114 return; 1115 #endif 1116 1117 /* 1118 * Locate the IOAPIC that manages the ISA IRQs (0-15). 1119 */ 1120 ioapic = mp_find_ioapic(0); 1121 if (ioapic < 0) 1122 return; 1123 dstapic = mp_ioapics[ioapic].apicid; 1124 1125 /* 1126 * Use the default configuration for the IRQs 0-15. Unless 1127 * overridden by (MADT) interrupt source override entries. 1128 */ 1129 for (i = 0; i < 16; i++) { 1130 int idx; 1131 1132 for (idx = 0; idx < mp_irq_entries; idx++) { 1133 struct mpc_intsrc *irq = mp_irqs + idx; 1134 1135 /* Do we already have a mapping for this ISA IRQ? */ 1136 if (irq->srcbus == MP_ISA_BUS && irq->srcbusirq == i) 1137 break; 1138 1139 /* Do we already have a mapping for this IOAPIC pin */ 1140 if (irq->dstapic == dstapic && irq->dstirq == i) 1141 break; 1142 } 1143 1144 if (idx != mp_irq_entries) { 1145 printk(KERN_DEBUG "ACPI: IRQ%d used by override.\n", i); 1146 continue; /* IRQ already used */ 1147 } 1148 1149 mp_irq.type = MP_INTSRC; 1150 mp_irq.irqflag = 0; /* Conforming */ 1151 mp_irq.srcbus = MP_ISA_BUS; 1152 mp_irq.dstapic = dstapic; 1153 mp_irq.irqtype = mp_INT; 1154 mp_irq.srcbusirq = i; /* Identity mapped */ 1155 mp_irq.dstirq = i; 1156 1157 save_mp_irq(&mp_irq); 1158 } 1159 } 1160 1161 int mp_register_gsi(u32 gsi, int triggering, int polarity) 1162 { 1163 int ioapic; 1164 int ioapic_pin; 1165 #ifdef CONFIG_X86_32 1166 #define MAX_GSI_NUM 4096 1167 #define IRQ_COMPRESSION_START 64 1168 1169 static int pci_irq = IRQ_COMPRESSION_START; 1170 /* 1171 * Mapping between Global System Interrupts, which 1172 * represent all possible interrupts, and IRQs 1173 * assigned to actual devices. 1174 */ 1175 static int gsi_to_irq[MAX_GSI_NUM]; 1176 #else 1177 1178 if (acpi_irq_model != ACPI_IRQ_MODEL_IOAPIC) 1179 return gsi; 1180 #endif 1181 1182 /* Don't set up the ACPI SCI because it's already set up */ 1183 if (acpi_gbl_FADT.sci_interrupt == gsi) 1184 return gsi; 1185 1186 ioapic = mp_find_ioapic(gsi); 1187 if (ioapic < 0) { 1188 printk(KERN_WARNING "No IOAPIC for GSI %u\n", gsi); 1189 return gsi; 1190 } 1191 1192 ioapic_pin = mp_find_ioapic_pin(ioapic, gsi); 1193 1194 #ifdef CONFIG_X86_32 1195 if (ioapic_renumber_irq) 1196 gsi = ioapic_renumber_irq(ioapic, gsi); 1197 #endif 1198 1199 /* 1200 * Avoid pin reprogramming. PRTs typically include entries 1201 * with redundant pin->gsi mappings (but unique PCI devices); 1202 * we only program the IOAPIC on the first. 1203 */ 1204 if (ioapic_pin > MP_MAX_IOAPIC_PIN) { 1205 printk(KERN_ERR "Invalid reference to IOAPIC pin " 1206 "%d-%d\n", mp_ioapic_routing[ioapic].apic_id, 1207 ioapic_pin); 1208 return gsi; 1209 } 1210 if (test_bit(ioapic_pin, mp_ioapic_routing[ioapic].pin_programmed)) { 1211 pr_debug("Pin %d-%d already programmed\n", 1212 mp_ioapic_routing[ioapic].apic_id, ioapic_pin); 1213 #ifdef CONFIG_X86_32 1214 return (gsi < IRQ_COMPRESSION_START ? gsi : gsi_to_irq[gsi]); 1215 #else 1216 return gsi; 1217 #endif 1218 } 1219 1220 set_bit(ioapic_pin, mp_ioapic_routing[ioapic].pin_programmed); 1221 #ifdef CONFIG_X86_32 1222 /* 1223 * For GSI >= 64, use IRQ compression 1224 */ 1225 if ((gsi >= IRQ_COMPRESSION_START) 1226 && (triggering == ACPI_LEVEL_SENSITIVE)) { 1227 /* 1228 * For PCI devices assign IRQs in order, avoiding gaps 1229 * due to unused I/O APIC pins. 1230 */ 1231 int irq = gsi; 1232 if (gsi < MAX_GSI_NUM) { 1233 /* 1234 * Retain the VIA chipset work-around (gsi > 15), but 1235 * avoid a problem where the 8254 timer (IRQ0) is setup 1236 * via an override (so it's not on pin 0 of the ioapic), 1237 * and at the same time, the pin 0 interrupt is a PCI 1238 * type. The gsi > 15 test could cause these two pins 1239 * to be shared as IRQ0, and they are not shareable. 1240 * So test for this condition, and if necessary, avoid 1241 * the pin collision. 1242 */ 1243 gsi = pci_irq++; 1244 /* 1245 * Don't assign IRQ used by ACPI SCI 1246 */ 1247 if (gsi == acpi_gbl_FADT.sci_interrupt) 1248 gsi = pci_irq++; 1249 gsi_to_irq[irq] = gsi; 1250 } else { 1251 printk(KERN_ERR "GSI %u is too high\n", gsi); 1252 return gsi; 1253 } 1254 } 1255 #endif 1256 io_apic_set_pci_routing(ioapic, ioapic_pin, gsi, 1257 triggering == ACPI_EDGE_SENSITIVE ? 0 : 1, 1258 polarity == ACPI_ACTIVE_HIGH ? 0 : 1); 1259 return gsi; 1260 } 1261 1262 int mp_config_acpi_gsi(unsigned char number, unsigned int devfn, u8 pin, 1263 u32 gsi, int triggering, int polarity) 1264 { 1265 #ifdef CONFIG_X86_MPPARSE 1266 struct mpc_intsrc mp_irq; 1267 int ioapic; 1268 1269 if (!acpi_ioapic) 1270 return 0; 1271 1272 /* print the entry should happen on mptable identically */ 1273 mp_irq.type = MP_INTSRC; 1274 mp_irq.irqtype = mp_INT; 1275 mp_irq.irqflag = (triggering == ACPI_EDGE_SENSITIVE ? 4 : 0x0c) | 1276 (polarity == ACPI_ACTIVE_HIGH ? 1 : 3); 1277 mp_irq.srcbus = number; 1278 mp_irq.srcbusirq = (((devfn >> 3) & 0x1f) << 2) | ((pin - 1) & 3); 1279 ioapic = mp_find_ioapic(gsi); 1280 mp_irq.dstapic = mp_ioapic_routing[ioapic].apic_id; 1281 mp_irq.dstirq = mp_find_ioapic_pin(ioapic, gsi); 1282 1283 save_mp_irq(&mp_irq); 1284 #endif 1285 return 0; 1286 } 1287 1288 /* 1289 * Parse IOAPIC related entries in MADT 1290 * returns 0 on success, < 0 on error 1291 */ 1292 static int __init acpi_parse_madt_ioapic_entries(void) 1293 { 1294 int count; 1295 1296 /* 1297 * ACPI interpreter is required to complete interrupt setup, 1298 * so if it is off, don't enumerate the io-apics with ACPI. 1299 * If MPS is present, it will handle them, 1300 * otherwise the system will stay in PIC mode 1301 */ 1302 if (acpi_disabled || acpi_noirq) { 1303 return -ENODEV; 1304 } 1305 1306 if (!cpu_has_apic) 1307 return -ENODEV; 1308 1309 /* 1310 * if "noapic" boot option, don't look for IO-APICs 1311 */ 1312 if (skip_ioapic_setup) { 1313 printk(KERN_INFO PREFIX "Skipping IOAPIC probe " 1314 "due to 'noapic' option.\n"); 1315 return -ENODEV; 1316 } 1317 1318 count = 1319 acpi_table_parse_madt(ACPI_MADT_TYPE_IO_APIC, acpi_parse_ioapic, 1320 MAX_IO_APICS); 1321 if (!count) { 1322 printk(KERN_ERR PREFIX "No IOAPIC entries present\n"); 1323 return -ENODEV; 1324 } else if (count < 0) { 1325 printk(KERN_ERR PREFIX "Error parsing IOAPIC entry\n"); 1326 return count; 1327 } 1328 1329 count = 1330 acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE, acpi_parse_int_src_ovr, 1331 nr_irqs); 1332 if (count < 0) { 1333 printk(KERN_ERR PREFIX 1334 "Error parsing interrupt source overrides entry\n"); 1335 /* TBD: Cleanup to allow fallback to MPS */ 1336 return count; 1337 } 1338 1339 /* 1340 * If BIOS did not supply an INT_SRC_OVR for the SCI 1341 * pretend we got one so we can set the SCI flags. 1342 */ 1343 if (!acpi_sci_override_gsi) 1344 acpi_sci_ioapic_setup(acpi_gbl_FADT.sci_interrupt, 0, 0); 1345 1346 /* Fill in identity legacy mapings where no override */ 1347 mp_config_acpi_legacy_irqs(); 1348 1349 count = 1350 acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE, acpi_parse_nmi_src, 1351 nr_irqs); 1352 if (count < 0) { 1353 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n"); 1354 /* TBD: Cleanup to allow fallback to MPS */ 1355 return count; 1356 } 1357 1358 return 0; 1359 } 1360 #else 1361 static inline int acpi_parse_madt_ioapic_entries(void) 1362 { 1363 return -1; 1364 } 1365 #endif /* !CONFIG_X86_IO_APIC */ 1366 1367 static void __init early_acpi_process_madt(void) 1368 { 1369 #ifdef CONFIG_X86_LOCAL_APIC 1370 int error; 1371 1372 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) { 1373 1374 /* 1375 * Parse MADT LAPIC entries 1376 */ 1377 error = early_acpi_parse_madt_lapic_addr_ovr(); 1378 if (!error) { 1379 acpi_lapic = 1; 1380 smp_found_config = 1; 1381 } 1382 if (error == -EINVAL) { 1383 /* 1384 * Dell Precision Workstation 410, 610 come here. 1385 */ 1386 printk(KERN_ERR PREFIX 1387 "Invalid BIOS MADT, disabling ACPI\n"); 1388 disable_acpi(); 1389 } 1390 } 1391 #endif 1392 } 1393 1394 static void __init acpi_process_madt(void) 1395 { 1396 #ifdef CONFIG_X86_LOCAL_APIC 1397 int error; 1398 1399 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) { 1400 1401 /* 1402 * Parse MADT LAPIC entries 1403 */ 1404 error = acpi_parse_madt_lapic_entries(); 1405 if (!error) { 1406 acpi_lapic = 1; 1407 1408 #ifdef CONFIG_X86_BIGSMP 1409 generic_bigsmp_probe(); 1410 #endif 1411 /* 1412 * Parse MADT IO-APIC entries 1413 */ 1414 error = acpi_parse_madt_ioapic_entries(); 1415 if (!error) { 1416 acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC; 1417 acpi_ioapic = 1; 1418 1419 smp_found_config = 1; 1420 if (apic->setup_apic_routing) 1421 apic->setup_apic_routing(); 1422 } 1423 } 1424 if (error == -EINVAL) { 1425 /* 1426 * Dell Precision Workstation 410, 610 come here. 1427 */ 1428 printk(KERN_ERR PREFIX 1429 "Invalid BIOS MADT, disabling ACPI\n"); 1430 disable_acpi(); 1431 } 1432 } else { 1433 /* 1434 * ACPI found no MADT, and so ACPI wants UP PIC mode. 1435 * In the event an MPS table was found, forget it. 1436 * Boot with "acpi=off" to use MPS on such a system. 1437 */ 1438 if (smp_found_config) { 1439 printk(KERN_WARNING PREFIX 1440 "No APIC-table, disabling MPS\n"); 1441 smp_found_config = 0; 1442 } 1443 } 1444 1445 /* 1446 * ACPI supports both logical (e.g. Hyper-Threading) and physical 1447 * processors, where MPS only supports physical. 1448 */ 1449 if (acpi_lapic && acpi_ioapic) 1450 printk(KERN_INFO "Using ACPI (MADT) for SMP configuration " 1451 "information\n"); 1452 else if (acpi_lapic) 1453 printk(KERN_INFO "Using ACPI for processor (LAPIC) " 1454 "configuration information\n"); 1455 #endif 1456 return; 1457 } 1458 1459 static int __init disable_acpi_irq(const struct dmi_system_id *d) 1460 { 1461 if (!acpi_force) { 1462 printk(KERN_NOTICE "%s detected: force use of acpi=noirq\n", 1463 d->ident); 1464 acpi_noirq_set(); 1465 } 1466 return 0; 1467 } 1468 1469 static int __init disable_acpi_pci(const struct dmi_system_id *d) 1470 { 1471 if (!acpi_force) { 1472 printk(KERN_NOTICE "%s detected: force use of pci=noacpi\n", 1473 d->ident); 1474 acpi_disable_pci(); 1475 } 1476 return 0; 1477 } 1478 1479 static int __init dmi_disable_acpi(const struct dmi_system_id *d) 1480 { 1481 if (!acpi_force) { 1482 printk(KERN_NOTICE "%s detected: acpi off\n", d->ident); 1483 disable_acpi(); 1484 } else { 1485 printk(KERN_NOTICE 1486 "Warning: DMI blacklist says broken, but acpi forced\n"); 1487 } 1488 return 0; 1489 } 1490 1491 /* 1492 * Limit ACPI to CPU enumeration for HT 1493 */ 1494 static int __init force_acpi_ht(const struct dmi_system_id *d) 1495 { 1496 if (!acpi_force) { 1497 printk(KERN_NOTICE "%s detected: force use of acpi=ht\n", 1498 d->ident); 1499 disable_acpi(); 1500 acpi_ht = 1; 1501 } else { 1502 printk(KERN_NOTICE 1503 "Warning: acpi=force overrules DMI blacklist: acpi=ht\n"); 1504 } 1505 return 0; 1506 } 1507 1508 /* 1509 * Force ignoring BIOS IRQ0 pin2 override 1510 */ 1511 static int __init dmi_ignore_irq0_timer_override(const struct dmi_system_id *d) 1512 { 1513 /* 1514 * The ati_ixp4x0_rev() early PCI quirk should have set 1515 * the acpi_skip_timer_override flag already: 1516 */ 1517 if (!acpi_skip_timer_override) { 1518 WARN(1, KERN_ERR "ati_ixp4x0 quirk not complete.\n"); 1519 pr_notice("%s detected: Ignoring BIOS IRQ0 pin2 override\n", 1520 d->ident); 1521 acpi_skip_timer_override = 1; 1522 } 1523 return 0; 1524 } 1525 1526 /* 1527 * If your system is blacklisted here, but you find that acpi=force 1528 * works for you, please contact linux-acpi@vger.kernel.org 1529 */ 1530 static struct dmi_system_id __initdata acpi_dmi_table[] = { 1531 /* 1532 * Boxes that need ACPI disabled 1533 */ 1534 { 1535 .callback = dmi_disable_acpi, 1536 .ident = "IBM Thinkpad", 1537 .matches = { 1538 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), 1539 DMI_MATCH(DMI_BOARD_NAME, "2629H1G"), 1540 }, 1541 }, 1542 1543 /* 1544 * Boxes that need acpi=ht 1545 */ 1546 { 1547 .callback = force_acpi_ht, 1548 .ident = "FSC Primergy T850", 1549 .matches = { 1550 DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"), 1551 DMI_MATCH(DMI_PRODUCT_NAME, "PRIMERGY T850"), 1552 }, 1553 }, 1554 { 1555 .callback = force_acpi_ht, 1556 .ident = "HP VISUALIZE NT Workstation", 1557 .matches = { 1558 DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"), 1559 DMI_MATCH(DMI_PRODUCT_NAME, "HP VISUALIZE NT Workstation"), 1560 }, 1561 }, 1562 { 1563 .callback = force_acpi_ht, 1564 .ident = "Compaq Workstation W8000", 1565 .matches = { 1566 DMI_MATCH(DMI_SYS_VENDOR, "Compaq"), 1567 DMI_MATCH(DMI_PRODUCT_NAME, "Workstation W8000"), 1568 }, 1569 }, 1570 { 1571 .callback = force_acpi_ht, 1572 .ident = "ASUS P4B266", 1573 .matches = { 1574 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."), 1575 DMI_MATCH(DMI_BOARD_NAME, "P4B266"), 1576 }, 1577 }, 1578 { 1579 .callback = force_acpi_ht, 1580 .ident = "ASUS P2B-DS", 1581 .matches = { 1582 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."), 1583 DMI_MATCH(DMI_BOARD_NAME, "P2B-DS"), 1584 }, 1585 }, 1586 { 1587 .callback = force_acpi_ht, 1588 .ident = "ASUS CUR-DLS", 1589 .matches = { 1590 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."), 1591 DMI_MATCH(DMI_BOARD_NAME, "CUR-DLS"), 1592 }, 1593 }, 1594 { 1595 .callback = force_acpi_ht, 1596 .ident = "ABIT i440BX-W83977", 1597 .matches = { 1598 DMI_MATCH(DMI_BOARD_VENDOR, "ABIT <http://www.abit.com>"), 1599 DMI_MATCH(DMI_BOARD_NAME, "i440BX-W83977 (BP6)"), 1600 }, 1601 }, 1602 { 1603 .callback = force_acpi_ht, 1604 .ident = "IBM Bladecenter", 1605 .matches = { 1606 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), 1607 DMI_MATCH(DMI_BOARD_NAME, "IBM eServer BladeCenter HS20"), 1608 }, 1609 }, 1610 { 1611 .callback = force_acpi_ht, 1612 .ident = "IBM eServer xSeries 360", 1613 .matches = { 1614 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), 1615 DMI_MATCH(DMI_BOARD_NAME, "eServer xSeries 360"), 1616 }, 1617 }, 1618 { 1619 .callback = force_acpi_ht, 1620 .ident = "IBM eserver xSeries 330", 1621 .matches = { 1622 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), 1623 DMI_MATCH(DMI_BOARD_NAME, "eserver xSeries 330"), 1624 }, 1625 }, 1626 { 1627 .callback = force_acpi_ht, 1628 .ident = "IBM eserver xSeries 440", 1629 .matches = { 1630 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), 1631 DMI_MATCH(DMI_PRODUCT_NAME, "eserver xSeries 440"), 1632 }, 1633 }, 1634 1635 /* 1636 * Boxes that need ACPI PCI IRQ routing disabled 1637 */ 1638 { 1639 .callback = disable_acpi_irq, 1640 .ident = "ASUS A7V", 1641 .matches = { 1642 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC"), 1643 DMI_MATCH(DMI_BOARD_NAME, "<A7V>"), 1644 /* newer BIOS, Revision 1011, does work */ 1645 DMI_MATCH(DMI_BIOS_VERSION, 1646 "ASUS A7V ACPI BIOS Revision 1007"), 1647 }, 1648 }, 1649 { 1650 /* 1651 * Latest BIOS for IBM 600E (1.16) has bad pcinum 1652 * for LPC bridge, which is needed for the PCI 1653 * interrupt links to work. DSDT fix is in bug 5966. 1654 * 2645, 2646 model numbers are shared with 600/600E/600X 1655 */ 1656 .callback = disable_acpi_irq, 1657 .ident = "IBM Thinkpad 600 Series 2645", 1658 .matches = { 1659 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), 1660 DMI_MATCH(DMI_BOARD_NAME, "2645"), 1661 }, 1662 }, 1663 { 1664 .callback = disable_acpi_irq, 1665 .ident = "IBM Thinkpad 600 Series 2646", 1666 .matches = { 1667 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), 1668 DMI_MATCH(DMI_BOARD_NAME, "2646"), 1669 }, 1670 }, 1671 /* 1672 * Boxes that need ACPI PCI IRQ routing and PCI scan disabled 1673 */ 1674 { /* _BBN 0 bug */ 1675 .callback = disable_acpi_pci, 1676 .ident = "ASUS PR-DLS", 1677 .matches = { 1678 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."), 1679 DMI_MATCH(DMI_BOARD_NAME, "PR-DLS"), 1680 DMI_MATCH(DMI_BIOS_VERSION, 1681 "ASUS PR-DLS ACPI BIOS Revision 1010"), 1682 DMI_MATCH(DMI_BIOS_DATE, "03/21/2003") 1683 }, 1684 }, 1685 { 1686 .callback = disable_acpi_pci, 1687 .ident = "Acer TravelMate 36x Laptop", 1688 .matches = { 1689 DMI_MATCH(DMI_SYS_VENDOR, "Acer"), 1690 DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"), 1691 }, 1692 }, 1693 {} 1694 }; 1695 1696 /* second table for DMI checks that should run after early-quirks */ 1697 static struct dmi_system_id __initdata acpi_dmi_table_late[] = { 1698 /* 1699 * HP laptops which use a DSDT reporting as HP/SB400/10000, 1700 * which includes some code which overrides all temperature 1701 * trip points to 16C if the INTIN2 input of the I/O APIC 1702 * is enabled. This input is incorrectly designated the 1703 * ISA IRQ 0 via an interrupt source override even though 1704 * it is wired to the output of the master 8259A and INTIN0 1705 * is not connected at all. Force ignoring BIOS IRQ0 pin2 1706 * override in that cases. 1707 */ 1708 { 1709 .callback = dmi_ignore_irq0_timer_override, 1710 .ident = "HP nx6115 laptop", 1711 .matches = { 1712 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 1713 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6115"), 1714 }, 1715 }, 1716 { 1717 .callback = dmi_ignore_irq0_timer_override, 1718 .ident = "HP NX6125 laptop", 1719 .matches = { 1720 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 1721 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6125"), 1722 }, 1723 }, 1724 { 1725 .callback = dmi_ignore_irq0_timer_override, 1726 .ident = "HP NX6325 laptop", 1727 .matches = { 1728 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 1729 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6325"), 1730 }, 1731 }, 1732 { 1733 .callback = dmi_ignore_irq0_timer_override, 1734 .ident = "HP 6715b laptop", 1735 .matches = { 1736 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 1737 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq 6715b"), 1738 }, 1739 }, 1740 {} 1741 }; 1742 1743 /* 1744 * acpi_boot_table_init() and acpi_boot_init() 1745 * called from setup_arch(), always. 1746 * 1. checksums all tables 1747 * 2. enumerates lapics 1748 * 3. enumerates io-apics 1749 * 1750 * acpi_table_init() is separate to allow reading SRAT without 1751 * other side effects. 1752 * 1753 * side effects of acpi_boot_init: 1754 * acpi_lapic = 1 if LAPIC found 1755 * acpi_ioapic = 1 if IOAPIC found 1756 * if (acpi_lapic && acpi_ioapic) smp_found_config = 1; 1757 * if acpi_blacklisted() acpi_disabled = 1; 1758 * acpi_irq_model=... 1759 * ... 1760 * 1761 * return value: (currently ignored) 1762 * 0: success 1763 * !0: failure 1764 */ 1765 1766 int __init acpi_boot_table_init(void) 1767 { 1768 int error; 1769 1770 dmi_check_system(acpi_dmi_table); 1771 1772 /* 1773 * If acpi_disabled, bail out 1774 * One exception: acpi=ht continues far enough to enumerate LAPICs 1775 */ 1776 if (acpi_disabled && !acpi_ht) 1777 return 1; 1778 1779 /* 1780 * Initialize the ACPI boot-time table parser. 1781 */ 1782 error = acpi_table_init(); 1783 if (error) { 1784 disable_acpi(); 1785 return error; 1786 } 1787 1788 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf); 1789 1790 /* 1791 * blacklist may disable ACPI entirely 1792 */ 1793 error = acpi_blacklisted(); 1794 if (error) { 1795 if (acpi_force) { 1796 printk(KERN_WARNING PREFIX "acpi=force override\n"); 1797 } else { 1798 printk(KERN_WARNING PREFIX "Disabling ACPI support\n"); 1799 disable_acpi(); 1800 return error; 1801 } 1802 } 1803 1804 return 0; 1805 } 1806 1807 int __init early_acpi_boot_init(void) 1808 { 1809 /* 1810 * If acpi_disabled, bail out 1811 * One exception: acpi=ht continues far enough to enumerate LAPICs 1812 */ 1813 if (acpi_disabled && !acpi_ht) 1814 return 1; 1815 1816 /* 1817 * Process the Multiple APIC Description Table (MADT), if present 1818 */ 1819 early_acpi_process_madt(); 1820 1821 return 0; 1822 } 1823 1824 int __init acpi_boot_init(void) 1825 { 1826 /* those are executed after early-quirks are executed */ 1827 dmi_check_system(acpi_dmi_table_late); 1828 1829 /* 1830 * If acpi_disabled, bail out 1831 * One exception: acpi=ht continues far enough to enumerate LAPICs 1832 */ 1833 if (acpi_disabled && !acpi_ht) 1834 return 1; 1835 1836 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf); 1837 1838 /* 1839 * set sci_int and PM timer address 1840 */ 1841 acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt); 1842 1843 /* 1844 * Process the Multiple APIC Description Table (MADT), if present 1845 */ 1846 acpi_process_madt(); 1847 1848 acpi_table_parse(ACPI_SIG_HPET, acpi_parse_hpet); 1849 1850 return 0; 1851 } 1852 1853 static int __init parse_acpi(char *arg) 1854 { 1855 if (!arg) 1856 return -EINVAL; 1857 1858 /* "acpi=off" disables both ACPI table parsing and interpreter */ 1859 if (strcmp(arg, "off") == 0) { 1860 disable_acpi(); 1861 } 1862 /* acpi=force to over-ride black-list */ 1863 else if (strcmp(arg, "force") == 0) { 1864 acpi_force = 1; 1865 acpi_ht = 1; 1866 acpi_disabled = 0; 1867 } 1868 /* acpi=strict disables out-of-spec workarounds */ 1869 else if (strcmp(arg, "strict") == 0) { 1870 acpi_strict = 1; 1871 } 1872 /* Limit ACPI just to boot-time to enable HT */ 1873 else if (strcmp(arg, "ht") == 0) { 1874 if (!acpi_force) 1875 disable_acpi(); 1876 acpi_ht = 1; 1877 } 1878 /* acpi=rsdt use RSDT instead of XSDT */ 1879 else if (strcmp(arg, "rsdt") == 0) { 1880 acpi_rsdt_forced = 1; 1881 } 1882 /* "acpi=noirq" disables ACPI interrupt routing */ 1883 else if (strcmp(arg, "noirq") == 0) { 1884 acpi_noirq_set(); 1885 } else { 1886 /* Core will printk when we return error. */ 1887 return -EINVAL; 1888 } 1889 return 0; 1890 } 1891 early_param("acpi", parse_acpi); 1892 1893 /* FIXME: Using pci= for an ACPI parameter is a travesty. */ 1894 static int __init parse_pci(char *arg) 1895 { 1896 if (arg && strcmp(arg, "noacpi") == 0) 1897 acpi_disable_pci(); 1898 return 0; 1899 } 1900 early_param("pci", parse_pci); 1901 1902 int __init acpi_mps_check(void) 1903 { 1904 #if defined(CONFIG_X86_LOCAL_APIC) && !defined(CONFIG_X86_MPPARSE) 1905 /* mptable code is not built-in*/ 1906 if (acpi_disabled || acpi_noirq) { 1907 printk(KERN_WARNING "MPS support code is not built-in.\n" 1908 "Using acpi=off or acpi=noirq or pci=noacpi " 1909 "may have problem\n"); 1910 return 1; 1911 } 1912 #endif 1913 return 0; 1914 } 1915 1916 #ifdef CONFIG_X86_IO_APIC 1917 static int __init parse_acpi_skip_timer_override(char *arg) 1918 { 1919 acpi_skip_timer_override = 1; 1920 return 0; 1921 } 1922 early_param("acpi_skip_timer_override", parse_acpi_skip_timer_override); 1923 1924 static int __init parse_acpi_use_timer_override(char *arg) 1925 { 1926 acpi_use_timer_override = 1; 1927 return 0; 1928 } 1929 early_param("acpi_use_timer_override", parse_acpi_use_timer_override); 1930 #endif /* CONFIG_X86_IO_APIC */ 1931 1932 static int __init setup_acpi_sci(char *s) 1933 { 1934 if (!s) 1935 return -EINVAL; 1936 if (!strcmp(s, "edge")) 1937 acpi_sci_flags = ACPI_MADT_TRIGGER_EDGE | 1938 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK); 1939 else if (!strcmp(s, "level")) 1940 acpi_sci_flags = ACPI_MADT_TRIGGER_LEVEL | 1941 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK); 1942 else if (!strcmp(s, "high")) 1943 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_HIGH | 1944 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK); 1945 else if (!strcmp(s, "low")) 1946 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_LOW | 1947 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK); 1948 else 1949 return -EINVAL; 1950 return 0; 1951 } 1952 early_param("acpi_sci", setup_acpi_sci); 1953 1954 int __acpi_acquire_global_lock(unsigned int *lock) 1955 { 1956 unsigned int old, new, val; 1957 do { 1958 old = *lock; 1959 new = (((old & ~0x3) + 2) + ((old >> 1) & 0x1)); 1960 val = cmpxchg(lock, old, new); 1961 } while (unlikely (val != old)); 1962 return (new < 3) ? -1 : 0; 1963 } 1964 1965 int __acpi_release_global_lock(unsigned int *lock) 1966 { 1967 unsigned int old, new, val; 1968 do { 1969 old = *lock; 1970 new = old & ~0x3; 1971 val = cmpxchg(lock, old, new); 1972 } while (unlikely (val != old)); 1973 return old & 0x1; 1974 } 1975