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/genapic.h> 41 #include <asm/io.h> 42 #include <asm/mpspec.h> 43 #include <asm/smp.h> 44 45 #ifdef CONFIG_X86_LOCAL_APIC 46 # include <mach_apic.h> 47 #endif 48 49 static int __initdata acpi_force = 0; 50 51 #ifdef CONFIG_ACPI 52 int acpi_disabled = 0; 53 #else 54 int acpi_disabled = 1; 55 #endif 56 EXPORT_SYMBOL(acpi_disabled); 57 58 #ifdef CONFIG_X86_64 59 60 #include <asm/proto.h> 61 62 #else /* X86 */ 63 64 #ifdef CONFIG_X86_LOCAL_APIC 65 #include <mach_apic.h> 66 #include <mach_mpparse.h> 67 #endif /* CONFIG_X86_LOCAL_APIC */ 68 69 #endif /* X86 */ 70 71 #define BAD_MADT_ENTRY(entry, end) ( \ 72 (!entry) || (unsigned long)entry + sizeof(*entry) > end || \ 73 ((struct acpi_subtable_header *)entry)->length < sizeof(*entry)) 74 75 #define PREFIX "ACPI: " 76 77 int acpi_noirq; /* skip ACPI IRQ initialization */ 78 int acpi_pci_disabled; /* skip ACPI PCI scan and IRQ initialization */ 79 EXPORT_SYMBOL(acpi_pci_disabled); 80 int acpi_ht __initdata = 1; /* enable HT */ 81 82 int acpi_lapic; 83 int acpi_ioapic; 84 int acpi_strict; 85 86 u8 acpi_sci_flags __initdata; 87 int acpi_sci_override_gsi __initdata; 88 int acpi_skip_timer_override __initdata; 89 int acpi_use_timer_override __initdata; 90 91 #ifdef CONFIG_X86_LOCAL_APIC 92 static u64 acpi_lapic_addr __initdata = APIC_DEFAULT_PHYS_BASE; 93 #endif 94 95 #ifndef __HAVE_ARCH_CMPXCHG 96 #warning ACPI uses CMPXCHG, i486 and later hardware 97 #endif 98 99 /* -------------------------------------------------------------------------- 100 Boot-time Configuration 101 -------------------------------------------------------------------------- */ 102 103 /* 104 * The default interrupt routing model is PIC (8259). This gets 105 * overridden if IOAPICs are enumerated (below). 106 */ 107 enum acpi_irq_model_id acpi_irq_model = ACPI_IRQ_MODEL_PIC; 108 109 110 /* 111 * Temporarily use the virtual area starting from FIX_IO_APIC_BASE_END, 112 * to map the target physical address. The problem is that set_fixmap() 113 * provides a single page, and it is possible that the page is not 114 * sufficient. 115 * By using this area, we can map up to MAX_IO_APICS pages temporarily, 116 * i.e. until the next __va_range() call. 117 * 118 * Important Safety Note: The fixed I/O APIC page numbers are *subtracted* 119 * from the fixed base. That's why we start at FIX_IO_APIC_BASE_END and 120 * count idx down while incrementing the phys address. 121 */ 122 char *__init __acpi_map_table(unsigned long phys, unsigned long size) 123 { 124 unsigned long base, offset, mapped_size; 125 int idx; 126 127 if (!phys || !size) 128 return NULL; 129 130 if (phys+size <= (max_low_pfn_mapped << PAGE_SHIFT)) 131 return __va(phys); 132 133 offset = phys & (PAGE_SIZE - 1); 134 mapped_size = PAGE_SIZE - offset; 135 clear_fixmap(FIX_ACPI_END); 136 set_fixmap(FIX_ACPI_END, phys); 137 base = fix_to_virt(FIX_ACPI_END); 138 139 /* 140 * Most cases can be covered by the below. 141 */ 142 idx = FIX_ACPI_END; 143 while (mapped_size < size) { 144 if (--idx < FIX_ACPI_BEGIN) 145 return NULL; /* cannot handle this */ 146 phys += PAGE_SIZE; 147 clear_fixmap(idx); 148 set_fixmap(idx, phys); 149 mapped_size += PAGE_SIZE; 150 } 151 152 return ((unsigned char *)base + offset); 153 } 154 155 #ifdef CONFIG_PCI_MMCONFIG 156 /* The physical address of the MMCONFIG aperture. Set from ACPI tables. */ 157 struct acpi_mcfg_allocation *pci_mmcfg_config; 158 int pci_mmcfg_config_num; 159 160 static int acpi_mcfg_64bit_base_addr __initdata = FALSE; 161 162 static int __init acpi_mcfg_oem_check(struct acpi_table_mcfg *mcfg) 163 { 164 if (!strcmp(mcfg->header.oem_id, "SGI")) 165 acpi_mcfg_64bit_base_addr = TRUE; 166 167 return 0; 168 } 169 170 int __init acpi_parse_mcfg(struct acpi_table_header *header) 171 { 172 struct acpi_table_mcfg *mcfg; 173 unsigned long i; 174 int config_size; 175 176 if (!header) 177 return -EINVAL; 178 179 mcfg = (struct acpi_table_mcfg *)header; 180 181 /* how many config structures do we have */ 182 pci_mmcfg_config_num = 0; 183 i = header->length - sizeof(struct acpi_table_mcfg); 184 while (i >= sizeof(struct acpi_mcfg_allocation)) { 185 ++pci_mmcfg_config_num; 186 i -= sizeof(struct acpi_mcfg_allocation); 187 }; 188 if (pci_mmcfg_config_num == 0) { 189 printk(KERN_ERR PREFIX "MMCONFIG has no entries\n"); 190 return -ENODEV; 191 } 192 193 config_size = pci_mmcfg_config_num * sizeof(*pci_mmcfg_config); 194 pci_mmcfg_config = kmalloc(config_size, GFP_KERNEL); 195 if (!pci_mmcfg_config) { 196 printk(KERN_WARNING PREFIX 197 "No memory for MCFG config tables\n"); 198 return -ENOMEM; 199 } 200 201 memcpy(pci_mmcfg_config, &mcfg[1], config_size); 202 203 acpi_mcfg_oem_check(mcfg); 204 205 for (i = 0; i < pci_mmcfg_config_num; ++i) { 206 if ((pci_mmcfg_config[i].address > 0xFFFFFFFF) && 207 !acpi_mcfg_64bit_base_addr) { 208 printk(KERN_ERR PREFIX 209 "MMCONFIG not in low 4GB of memory\n"); 210 kfree(pci_mmcfg_config); 211 pci_mmcfg_config_num = 0; 212 return -ENODEV; 213 } 214 } 215 216 return 0; 217 } 218 #endif /* CONFIG_PCI_MMCONFIG */ 219 220 #ifdef CONFIG_X86_LOCAL_APIC 221 static int __init acpi_parse_madt(struct acpi_table_header *table) 222 { 223 struct acpi_table_madt *madt = NULL; 224 225 if (!cpu_has_apic) 226 return -EINVAL; 227 228 madt = (struct acpi_table_madt *)table; 229 if (!madt) { 230 printk(KERN_WARNING PREFIX "Unable to map MADT\n"); 231 return -ENODEV; 232 } 233 234 if (madt->address) { 235 acpi_lapic_addr = (u64) madt->address; 236 237 printk(KERN_DEBUG PREFIX "Local APIC address 0x%08x\n", 238 madt->address); 239 } 240 241 acpi_madt_oem_check(madt->header.oem_id, madt->header.oem_table_id); 242 243 return 0; 244 } 245 246 static void __cpuinit acpi_register_lapic(int id, u8 enabled) 247 { 248 unsigned int ver = 0; 249 250 if (!enabled) { 251 ++disabled_cpus; 252 return; 253 } 254 255 #ifdef CONFIG_X86_32 256 if (boot_cpu_physical_apicid != -1U) 257 ver = apic_version[boot_cpu_physical_apicid]; 258 #endif 259 260 generic_processor_info(id, ver); 261 } 262 263 static int __init 264 acpi_parse_lapic(struct acpi_subtable_header * header, const unsigned long end) 265 { 266 struct acpi_madt_local_apic *processor = NULL; 267 268 processor = (struct acpi_madt_local_apic *)header; 269 270 if (BAD_MADT_ENTRY(processor, end)) 271 return -EINVAL; 272 273 acpi_table_print_madt_entry(header); 274 275 /* 276 * We need to register disabled CPU as well to permit 277 * counting disabled CPUs. This allows us to size 278 * cpus_possible_map more accurately, to permit 279 * to not preallocating memory for all NR_CPUS 280 * when we use CPU hotplug. 281 */ 282 acpi_register_lapic(processor->id, /* APIC ID */ 283 processor->lapic_flags & ACPI_MADT_ENABLED); 284 285 return 0; 286 } 287 288 static int __init 289 acpi_parse_sapic(struct acpi_subtable_header *header, const unsigned long end) 290 { 291 struct acpi_madt_local_sapic *processor = NULL; 292 293 processor = (struct acpi_madt_local_sapic *)header; 294 295 if (BAD_MADT_ENTRY(processor, end)) 296 return -EINVAL; 297 298 acpi_table_print_madt_entry(header); 299 300 acpi_register_lapic((processor->id << 8) | processor->eid,/* APIC ID */ 301 processor->lapic_flags & ACPI_MADT_ENABLED); 302 303 return 0; 304 } 305 306 static int __init 307 acpi_parse_lapic_addr_ovr(struct acpi_subtable_header * header, 308 const unsigned long end) 309 { 310 struct acpi_madt_local_apic_override *lapic_addr_ovr = NULL; 311 312 lapic_addr_ovr = (struct acpi_madt_local_apic_override *)header; 313 314 if (BAD_MADT_ENTRY(lapic_addr_ovr, end)) 315 return -EINVAL; 316 317 acpi_lapic_addr = lapic_addr_ovr->address; 318 319 return 0; 320 } 321 322 static int __init 323 acpi_parse_lapic_nmi(struct acpi_subtable_header * header, const unsigned long end) 324 { 325 struct acpi_madt_local_apic_nmi *lapic_nmi = NULL; 326 327 lapic_nmi = (struct acpi_madt_local_apic_nmi *)header; 328 329 if (BAD_MADT_ENTRY(lapic_nmi, end)) 330 return -EINVAL; 331 332 acpi_table_print_madt_entry(header); 333 334 if (lapic_nmi->lint != 1) 335 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n"); 336 337 return 0; 338 } 339 340 #endif /*CONFIG_X86_LOCAL_APIC */ 341 342 #ifdef CONFIG_X86_IO_APIC 343 344 static int __init 345 acpi_parse_ioapic(struct acpi_subtable_header * header, const unsigned long end) 346 { 347 struct acpi_madt_io_apic *ioapic = NULL; 348 349 ioapic = (struct acpi_madt_io_apic *)header; 350 351 if (BAD_MADT_ENTRY(ioapic, end)) 352 return -EINVAL; 353 354 acpi_table_print_madt_entry(header); 355 356 mp_register_ioapic(ioapic->id, 357 ioapic->address, ioapic->global_irq_base); 358 359 return 0; 360 } 361 362 /* 363 * Parse Interrupt Source Override for the ACPI SCI 364 */ 365 static void __init acpi_sci_ioapic_setup(u32 gsi, u16 polarity, u16 trigger) 366 { 367 if (trigger == 0) /* compatible SCI trigger is level */ 368 trigger = 3; 369 370 if (polarity == 0) /* compatible SCI polarity is low */ 371 polarity = 3; 372 373 /* Command-line over-ride via acpi_sci= */ 374 if (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) 375 trigger = (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2; 376 377 if (acpi_sci_flags & ACPI_MADT_POLARITY_MASK) 378 polarity = acpi_sci_flags & ACPI_MADT_POLARITY_MASK; 379 380 /* 381 * mp_config_acpi_legacy_irqs() already setup IRQs < 16 382 * If GSI is < 16, this will update its flags, 383 * else it will create a new mp_irqs[] entry. 384 */ 385 mp_override_legacy_irq(gsi, polarity, trigger, gsi); 386 387 /* 388 * stash over-ride to indicate we've been here 389 * and for later update of acpi_gbl_FADT 390 */ 391 acpi_sci_override_gsi = gsi; 392 return; 393 } 394 395 static int __init 396 acpi_parse_int_src_ovr(struct acpi_subtable_header * header, 397 const unsigned long end) 398 { 399 struct acpi_madt_interrupt_override *intsrc = NULL; 400 401 intsrc = (struct acpi_madt_interrupt_override *)header; 402 403 if (BAD_MADT_ENTRY(intsrc, end)) 404 return -EINVAL; 405 406 acpi_table_print_madt_entry(header); 407 408 if (intsrc->source_irq == acpi_gbl_FADT.sci_interrupt) { 409 acpi_sci_ioapic_setup(intsrc->global_irq, 410 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK, 411 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2); 412 return 0; 413 } 414 415 if (acpi_skip_timer_override && 416 intsrc->source_irq == 0 && intsrc->global_irq == 2) { 417 printk(PREFIX "BIOS IRQ0 pin2 override ignored.\n"); 418 return 0; 419 } 420 421 mp_override_legacy_irq(intsrc->source_irq, 422 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK, 423 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2, 424 intsrc->global_irq); 425 426 return 0; 427 } 428 429 static int __init 430 acpi_parse_nmi_src(struct acpi_subtable_header * header, const unsigned long end) 431 { 432 struct acpi_madt_nmi_source *nmi_src = NULL; 433 434 nmi_src = (struct acpi_madt_nmi_source *)header; 435 436 if (BAD_MADT_ENTRY(nmi_src, end)) 437 return -EINVAL; 438 439 acpi_table_print_madt_entry(header); 440 441 /* TBD: Support nimsrc entries? */ 442 443 return 0; 444 } 445 446 #endif /* CONFIG_X86_IO_APIC */ 447 448 /* 449 * acpi_pic_sci_set_trigger() 450 * 451 * use ELCR to set PIC-mode trigger type for SCI 452 * 453 * If a PIC-mode SCI is not recognized or gives spurious IRQ7's 454 * it may require Edge Trigger -- use "acpi_sci=edge" 455 * 456 * Port 0x4d0-4d1 are ECLR1 and ECLR2, the Edge/Level Control Registers 457 * for the 8259 PIC. bit[n] = 1 means irq[n] is Level, otherwise Edge. 458 * ECLR1 is IRQs 0-7 (IRQ 0, 1, 2 must be 0) 459 * ECLR2 is IRQs 8-15 (IRQ 8, 13 must be 0) 460 */ 461 462 void __init acpi_pic_sci_set_trigger(unsigned int irq, u16 trigger) 463 { 464 unsigned int mask = 1 << irq; 465 unsigned int old, new; 466 467 /* Real old ELCR mask */ 468 old = inb(0x4d0) | (inb(0x4d1) << 8); 469 470 /* 471 * If we use ACPI to set PCI IRQs, then we should clear ELCR 472 * since we will set it correctly as we enable the PCI irq 473 * routing. 474 */ 475 new = acpi_noirq ? old : 0; 476 477 /* 478 * Update SCI information in the ELCR, it isn't in the PCI 479 * routing tables.. 480 */ 481 switch (trigger) { 482 case 1: /* Edge - clear */ 483 new &= ~mask; 484 break; 485 case 3: /* Level - set */ 486 new |= mask; 487 break; 488 } 489 490 if (old == new) 491 return; 492 493 printk(PREFIX "setting ELCR to %04x (from %04x)\n", new, old); 494 outb(new, 0x4d0); 495 outb(new >> 8, 0x4d1); 496 } 497 498 int acpi_gsi_to_irq(u32 gsi, unsigned int *irq) 499 { 500 *irq = gsi; 501 return 0; 502 } 503 504 /* 505 * success: return IRQ number (>=0) 506 * failure: return < 0 507 */ 508 int acpi_register_gsi(u32 gsi, int triggering, int polarity) 509 { 510 unsigned int irq; 511 unsigned int plat_gsi = gsi; 512 513 #ifdef CONFIG_PCI 514 /* 515 * Make sure all (legacy) PCI IRQs are set as level-triggered. 516 */ 517 if (acpi_irq_model == ACPI_IRQ_MODEL_PIC) { 518 if (triggering == ACPI_LEVEL_SENSITIVE) 519 eisa_set_level_irq(gsi); 520 } 521 #endif 522 523 #ifdef CONFIG_X86_IO_APIC 524 if (acpi_irq_model == ACPI_IRQ_MODEL_IOAPIC) { 525 plat_gsi = mp_register_gsi(gsi, triggering, polarity); 526 } 527 #endif 528 acpi_gsi_to_irq(plat_gsi, &irq); 529 return irq; 530 } 531 532 /* 533 * ACPI based hotplug support for CPU 534 */ 535 #ifdef CONFIG_ACPI_HOTPLUG_CPU 536 537 static int __cpuinit _acpi_map_lsapic(acpi_handle handle, int *pcpu) 538 { 539 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; 540 union acpi_object *obj; 541 struct acpi_madt_local_apic *lapic; 542 cpumask_t tmp_map, new_map; 543 u8 physid; 544 int cpu; 545 546 if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer))) 547 return -EINVAL; 548 549 if (!buffer.length || !buffer.pointer) 550 return -EINVAL; 551 552 obj = buffer.pointer; 553 if (obj->type != ACPI_TYPE_BUFFER || 554 obj->buffer.length < sizeof(*lapic)) { 555 kfree(buffer.pointer); 556 return -EINVAL; 557 } 558 559 lapic = (struct acpi_madt_local_apic *)obj->buffer.pointer; 560 561 if (lapic->header.type != ACPI_MADT_TYPE_LOCAL_APIC || 562 !(lapic->lapic_flags & ACPI_MADT_ENABLED)) { 563 kfree(buffer.pointer); 564 return -EINVAL; 565 } 566 567 physid = lapic->id; 568 569 kfree(buffer.pointer); 570 buffer.length = ACPI_ALLOCATE_BUFFER; 571 buffer.pointer = NULL; 572 573 tmp_map = cpu_present_map; 574 acpi_register_lapic(physid, lapic->lapic_flags & ACPI_MADT_ENABLED); 575 576 /* 577 * If mp_register_lapic successfully generates a new logical cpu 578 * number, then the following will get us exactly what was mapped 579 */ 580 cpus_andnot(new_map, cpu_present_map, tmp_map); 581 if (cpus_empty(new_map)) { 582 printk ("Unable to map lapic to logical cpu number\n"); 583 return -EINVAL; 584 } 585 586 cpu = first_cpu(new_map); 587 588 *pcpu = cpu; 589 return 0; 590 } 591 592 /* wrapper to silence section mismatch warning */ 593 int __ref acpi_map_lsapic(acpi_handle handle, int *pcpu) 594 { 595 return _acpi_map_lsapic(handle, pcpu); 596 } 597 EXPORT_SYMBOL(acpi_map_lsapic); 598 599 int acpi_unmap_lsapic(int cpu) 600 { 601 per_cpu(x86_cpu_to_apicid, cpu) = -1; 602 cpu_clear(cpu, cpu_present_map); 603 num_processors--; 604 605 return (0); 606 } 607 608 EXPORT_SYMBOL(acpi_unmap_lsapic); 609 #endif /* CONFIG_ACPI_HOTPLUG_CPU */ 610 611 int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base) 612 { 613 /* TBD */ 614 return -EINVAL; 615 } 616 617 EXPORT_SYMBOL(acpi_register_ioapic); 618 619 int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base) 620 { 621 /* TBD */ 622 return -EINVAL; 623 } 624 625 EXPORT_SYMBOL(acpi_unregister_ioapic); 626 627 static int __init acpi_parse_sbf(struct acpi_table_header *table) 628 { 629 struct acpi_table_boot *sb; 630 631 sb = (struct acpi_table_boot *)table; 632 if (!sb) { 633 printk(KERN_WARNING PREFIX "Unable to map SBF\n"); 634 return -ENODEV; 635 } 636 637 sbf_port = sb->cmos_index; /* Save CMOS port */ 638 639 return 0; 640 } 641 642 #ifdef CONFIG_HPET_TIMER 643 #include <asm/hpet.h> 644 645 static struct __initdata resource *hpet_res; 646 647 static int __init acpi_parse_hpet(struct acpi_table_header *table) 648 { 649 struct acpi_table_hpet *hpet_tbl; 650 651 hpet_tbl = (struct acpi_table_hpet *)table; 652 if (!hpet_tbl) { 653 printk(KERN_WARNING PREFIX "Unable to map HPET\n"); 654 return -ENODEV; 655 } 656 657 if (hpet_tbl->address.space_id != ACPI_SPACE_MEM) { 658 printk(KERN_WARNING PREFIX "HPET timers must be located in " 659 "memory.\n"); 660 return -1; 661 } 662 663 hpet_address = hpet_tbl->address.address; 664 665 /* 666 * Some broken BIOSes advertise HPET at 0x0. We really do not 667 * want to allocate a resource there. 668 */ 669 if (!hpet_address) { 670 printk(KERN_WARNING PREFIX 671 "HPET id: %#x base: %#lx is invalid\n", 672 hpet_tbl->id, hpet_address); 673 return 0; 674 } 675 #ifdef CONFIG_X86_64 676 /* 677 * Some even more broken BIOSes advertise HPET at 678 * 0xfed0000000000000 instead of 0xfed00000. Fix it up and add 679 * some noise: 680 */ 681 if (hpet_address == 0xfed0000000000000UL) { 682 if (!hpet_force_user) { 683 printk(KERN_WARNING PREFIX "HPET id: %#x " 684 "base: 0xfed0000000000000 is bogus\n " 685 "try hpet=force on the kernel command line to " 686 "fix it up to 0xfed00000.\n", hpet_tbl->id); 687 hpet_address = 0; 688 return 0; 689 } 690 printk(KERN_WARNING PREFIX 691 "HPET id: %#x base: 0xfed0000000000000 fixed up " 692 "to 0xfed00000.\n", hpet_tbl->id); 693 hpet_address >>= 32; 694 } 695 #endif 696 printk(KERN_INFO PREFIX "HPET id: %#x base: %#lx\n", 697 hpet_tbl->id, hpet_address); 698 699 /* 700 * Allocate and initialize the HPET firmware resource for adding into 701 * the resource tree during the lateinit timeframe. 702 */ 703 #define HPET_RESOURCE_NAME_SIZE 9 704 hpet_res = alloc_bootmem(sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE); 705 706 hpet_res->name = (void *)&hpet_res[1]; 707 hpet_res->flags = IORESOURCE_MEM; 708 snprintf((char *)hpet_res->name, HPET_RESOURCE_NAME_SIZE, "HPET %u", 709 hpet_tbl->sequence); 710 711 hpet_res->start = hpet_address; 712 hpet_res->end = hpet_address + (1 * 1024) - 1; 713 714 return 0; 715 } 716 717 /* 718 * hpet_insert_resource inserts the HPET resources used into the resource 719 * tree. 720 */ 721 static __init int hpet_insert_resource(void) 722 { 723 if (!hpet_res) 724 return 1; 725 726 return insert_resource(&iomem_resource, hpet_res); 727 } 728 729 late_initcall(hpet_insert_resource); 730 731 #else 732 #define acpi_parse_hpet NULL 733 #endif 734 735 static int __init acpi_parse_fadt(struct acpi_table_header *table) 736 { 737 738 #ifdef CONFIG_X86_PM_TIMER 739 /* detect the location of the ACPI PM Timer */ 740 if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID) { 741 /* FADT rev. 2 */ 742 if (acpi_gbl_FADT.xpm_timer_block.space_id != 743 ACPI_ADR_SPACE_SYSTEM_IO) 744 return 0; 745 746 pmtmr_ioport = acpi_gbl_FADT.xpm_timer_block.address; 747 /* 748 * "X" fields are optional extensions to the original V1.0 749 * fields, so we must selectively expand V1.0 fields if the 750 * corresponding X field is zero. 751 */ 752 if (!pmtmr_ioport) 753 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block; 754 } else { 755 /* FADT rev. 1 */ 756 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block; 757 } 758 if (pmtmr_ioport) 759 printk(KERN_INFO PREFIX "PM-Timer IO Port: %#x\n", 760 pmtmr_ioport); 761 #endif 762 return 0; 763 } 764 765 #ifdef CONFIG_X86_LOCAL_APIC 766 /* 767 * Parse LAPIC entries in MADT 768 * returns 0 on success, < 0 on error 769 */ 770 771 static void __init acpi_register_lapic_address(unsigned long address) 772 { 773 mp_lapic_addr = address; 774 775 set_fixmap_nocache(FIX_APIC_BASE, address); 776 if (boot_cpu_physical_apicid == -1U) { 777 boot_cpu_physical_apicid = GET_APIC_ID(read_apic_id()); 778 #ifdef CONFIG_X86_32 779 apic_version[boot_cpu_physical_apicid] = 780 GET_APIC_VERSION(apic_read(APIC_LVR)); 781 #endif 782 } 783 } 784 785 static int __init early_acpi_parse_madt_lapic_addr_ovr(void) 786 { 787 int count; 788 789 if (!cpu_has_apic) 790 return -ENODEV; 791 792 /* 793 * Note that the LAPIC address is obtained from the MADT (32-bit value) 794 * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value). 795 */ 796 797 count = 798 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE, 799 acpi_parse_lapic_addr_ovr, 0); 800 if (count < 0) { 801 printk(KERN_ERR PREFIX 802 "Error parsing LAPIC address override entry\n"); 803 return count; 804 } 805 806 acpi_register_lapic_address(acpi_lapic_addr); 807 808 return count; 809 } 810 811 static int __init acpi_parse_madt_lapic_entries(void) 812 { 813 int count; 814 815 if (!cpu_has_apic) 816 return -ENODEV; 817 818 /* 819 * Note that the LAPIC address is obtained from the MADT (32-bit value) 820 * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value). 821 */ 822 823 count = 824 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE, 825 acpi_parse_lapic_addr_ovr, 0); 826 if (count < 0) { 827 printk(KERN_ERR PREFIX 828 "Error parsing LAPIC address override entry\n"); 829 return count; 830 } 831 832 acpi_register_lapic_address(acpi_lapic_addr); 833 834 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC, 835 acpi_parse_sapic, MAX_APICS); 836 837 if (!count) 838 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC, 839 acpi_parse_lapic, MAX_APICS); 840 if (!count) { 841 printk(KERN_ERR PREFIX "No LAPIC entries present\n"); 842 /* TBD: Cleanup to allow fallback to MPS */ 843 return -ENODEV; 844 } else if (count < 0) { 845 printk(KERN_ERR PREFIX "Error parsing LAPIC entry\n"); 846 /* TBD: Cleanup to allow fallback to MPS */ 847 return count; 848 } 849 850 count = 851 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI, acpi_parse_lapic_nmi, 0); 852 if (count < 0) { 853 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n"); 854 /* TBD: Cleanup to allow fallback to MPS */ 855 return count; 856 } 857 return 0; 858 } 859 #endif /* CONFIG_X86_LOCAL_APIC */ 860 861 #ifdef CONFIG_X86_IO_APIC 862 #define MP_ISA_BUS 0 863 864 #ifdef CONFIG_X86_ES7000 865 extern int es7000_plat; 866 #endif 867 868 static struct { 869 int apic_id; 870 int gsi_base; 871 int gsi_end; 872 DECLARE_BITMAP(pin_programmed, MP_MAX_IOAPIC_PIN + 1); 873 } mp_ioapic_routing[MAX_IO_APICS]; 874 875 static int mp_find_ioapic(int gsi) 876 { 877 int i = 0; 878 879 /* Find the IOAPIC that manages this GSI. */ 880 for (i = 0; i < nr_ioapics; i++) { 881 if ((gsi >= mp_ioapic_routing[i].gsi_base) 882 && (gsi <= mp_ioapic_routing[i].gsi_end)) 883 return i; 884 } 885 886 printk(KERN_ERR "ERROR: Unable to locate IOAPIC for GSI %d\n", gsi); 887 return -1; 888 } 889 890 static u8 __init uniq_ioapic_id(u8 id) 891 { 892 #ifdef CONFIG_X86_32 893 if ((boot_cpu_data.x86_vendor == X86_VENDOR_INTEL) && 894 !APIC_XAPIC(apic_version[boot_cpu_physical_apicid])) 895 return io_apic_get_unique_id(nr_ioapics, id); 896 else 897 return id; 898 #else 899 int i; 900 DECLARE_BITMAP(used, 256); 901 bitmap_zero(used, 256); 902 for (i = 0; i < nr_ioapics; i++) { 903 struct mp_config_ioapic *ia = &mp_ioapics[i]; 904 __set_bit(ia->mp_apicid, used); 905 } 906 if (!test_bit(id, used)) 907 return id; 908 return find_first_zero_bit(used, 256); 909 #endif 910 } 911 912 static int bad_ioapic(unsigned long address) 913 { 914 if (nr_ioapics >= MAX_IO_APICS) { 915 printk(KERN_ERR "ERROR: Max # of I/O APICs (%d) exceeded " 916 "(found %d)\n", MAX_IO_APICS, nr_ioapics); 917 panic("Recompile kernel with bigger MAX_IO_APICS!\n"); 918 } 919 if (!address) { 920 printk(KERN_ERR "WARNING: Bogus (zero) I/O APIC address" 921 " found in table, skipping!\n"); 922 return 1; 923 } 924 return 0; 925 } 926 927 void __init mp_register_ioapic(int id, u32 address, u32 gsi_base) 928 { 929 int idx = 0; 930 931 if (bad_ioapic(address)) 932 return; 933 934 idx = nr_ioapics; 935 936 mp_ioapics[idx].mp_type = MP_IOAPIC; 937 mp_ioapics[idx].mp_flags = MPC_APIC_USABLE; 938 mp_ioapics[idx].mp_apicaddr = address; 939 940 set_fixmap_nocache(FIX_IO_APIC_BASE_0 + idx, address); 941 mp_ioapics[idx].mp_apicid = uniq_ioapic_id(id); 942 #ifdef CONFIG_X86_32 943 mp_ioapics[idx].mp_apicver = io_apic_get_version(idx); 944 #else 945 mp_ioapics[idx].mp_apicver = 0; 946 #endif 947 /* 948 * Build basic GSI lookup table to facilitate gsi->io_apic lookups 949 * and to prevent reprogramming of IOAPIC pins (PCI GSIs). 950 */ 951 mp_ioapic_routing[idx].apic_id = mp_ioapics[idx].mp_apicid; 952 mp_ioapic_routing[idx].gsi_base = gsi_base; 953 mp_ioapic_routing[idx].gsi_end = gsi_base + 954 io_apic_get_redir_entries(idx); 955 956 printk(KERN_INFO "IOAPIC[%d]: apic_id %d, version %d, address 0x%lx, " 957 "GSI %d-%d\n", idx, mp_ioapics[idx].mp_apicid, 958 mp_ioapics[idx].mp_apicver, mp_ioapics[idx].mp_apicaddr, 959 mp_ioapic_routing[idx].gsi_base, mp_ioapic_routing[idx].gsi_end); 960 961 nr_ioapics++; 962 } 963 964 static void assign_to_mp_irq(struct mp_config_intsrc *m, 965 struct mp_config_intsrc *mp_irq) 966 { 967 memcpy(mp_irq, m, sizeof(struct mp_config_intsrc)); 968 } 969 970 static int mp_irq_cmp(struct mp_config_intsrc *mp_irq, 971 struct mp_config_intsrc *m) 972 { 973 return memcmp(mp_irq, m, sizeof(struct mp_config_intsrc)); 974 } 975 976 static void save_mp_irq(struct mp_config_intsrc *m) 977 { 978 int i; 979 980 for (i = 0; i < mp_irq_entries; i++) { 981 if (!mp_irq_cmp(&mp_irqs[i], m)) 982 return; 983 } 984 985 assign_to_mp_irq(m, &mp_irqs[mp_irq_entries]); 986 if (++mp_irq_entries == MAX_IRQ_SOURCES) 987 panic("Max # of irq sources exceeded!!\n"); 988 } 989 990 void __init mp_override_legacy_irq(u8 bus_irq, u8 polarity, u8 trigger, u32 gsi) 991 { 992 int ioapic; 993 int pin; 994 struct mp_config_intsrc mp_irq; 995 996 /* 997 * Convert 'gsi' to 'ioapic.pin'. 998 */ 999 ioapic = mp_find_ioapic(gsi); 1000 if (ioapic < 0) 1001 return; 1002 pin = gsi - mp_ioapic_routing[ioapic].gsi_base; 1003 1004 /* 1005 * TBD: This check is for faulty timer entries, where the override 1006 * erroneously sets the trigger to level, resulting in a HUGE 1007 * increase of timer interrupts! 1008 */ 1009 if ((bus_irq == 0) && (trigger == 3)) 1010 trigger = 1; 1011 1012 mp_irq.mp_type = MP_INTSRC; 1013 mp_irq.mp_irqtype = mp_INT; 1014 mp_irq.mp_irqflag = (trigger << 2) | polarity; 1015 mp_irq.mp_srcbus = MP_ISA_BUS; 1016 mp_irq.mp_srcbusirq = bus_irq; /* IRQ */ 1017 mp_irq.mp_dstapic = mp_ioapics[ioapic].mp_apicid; /* APIC ID */ 1018 mp_irq.mp_dstirq = pin; /* INTIN# */ 1019 1020 save_mp_irq(&mp_irq); 1021 } 1022 1023 void __init mp_config_acpi_legacy_irqs(void) 1024 { 1025 int i; 1026 int ioapic; 1027 unsigned int dstapic; 1028 struct mp_config_intsrc mp_irq; 1029 1030 #if defined (CONFIG_MCA) || defined (CONFIG_EISA) 1031 /* 1032 * Fabricate the legacy ISA bus (bus #31). 1033 */ 1034 mp_bus_id_to_type[MP_ISA_BUS] = MP_BUS_ISA; 1035 #endif 1036 set_bit(MP_ISA_BUS, mp_bus_not_pci); 1037 pr_debug("Bus #%d is ISA\n", MP_ISA_BUS); 1038 1039 #ifdef CONFIG_X86_ES7000 1040 /* 1041 * Older generations of ES7000 have no legacy identity mappings 1042 */ 1043 if (es7000_plat == 1) 1044 return; 1045 #endif 1046 1047 /* 1048 * Locate the IOAPIC that manages the ISA IRQs (0-15). 1049 */ 1050 ioapic = mp_find_ioapic(0); 1051 if (ioapic < 0) 1052 return; 1053 dstapic = mp_ioapics[ioapic].mp_apicid; 1054 1055 /* 1056 * Use the default configuration for the IRQs 0-15. Unless 1057 * overridden by (MADT) interrupt source override entries. 1058 */ 1059 for (i = 0; i < 16; i++) { 1060 int idx; 1061 1062 for (idx = 0; idx < mp_irq_entries; idx++) { 1063 struct mp_config_intsrc *irq = mp_irqs + idx; 1064 1065 /* Do we already have a mapping for this ISA IRQ? */ 1066 if (irq->mp_srcbus == MP_ISA_BUS 1067 && irq->mp_srcbusirq == i) 1068 break; 1069 1070 /* Do we already have a mapping for this IOAPIC pin */ 1071 if (irq->mp_dstapic == dstapic && 1072 irq->mp_dstirq == i) 1073 break; 1074 } 1075 1076 if (idx != mp_irq_entries) { 1077 printk(KERN_DEBUG "ACPI: IRQ%d used by override.\n", i); 1078 continue; /* IRQ already used */ 1079 } 1080 1081 mp_irq.mp_type = MP_INTSRC; 1082 mp_irq.mp_irqflag = 0; /* Conforming */ 1083 mp_irq.mp_srcbus = MP_ISA_BUS; 1084 mp_irq.mp_dstapic = dstapic; 1085 mp_irq.mp_irqtype = mp_INT; 1086 mp_irq.mp_srcbusirq = i; /* Identity mapped */ 1087 mp_irq.mp_dstirq = i; 1088 1089 save_mp_irq(&mp_irq); 1090 } 1091 } 1092 1093 int mp_register_gsi(u32 gsi, int triggering, int polarity) 1094 { 1095 int ioapic; 1096 int ioapic_pin; 1097 #ifdef CONFIG_X86_32 1098 #define MAX_GSI_NUM 4096 1099 #define IRQ_COMPRESSION_START 64 1100 1101 static int pci_irq = IRQ_COMPRESSION_START; 1102 /* 1103 * Mapping between Global System Interrupts, which 1104 * represent all possible interrupts, and IRQs 1105 * assigned to actual devices. 1106 */ 1107 static int gsi_to_irq[MAX_GSI_NUM]; 1108 #else 1109 1110 if (acpi_irq_model != ACPI_IRQ_MODEL_IOAPIC) 1111 return gsi; 1112 #endif 1113 1114 /* Don't set up the ACPI SCI because it's already set up */ 1115 if (acpi_gbl_FADT.sci_interrupt == gsi) 1116 return gsi; 1117 1118 ioapic = mp_find_ioapic(gsi); 1119 if (ioapic < 0) { 1120 printk(KERN_WARNING "No IOAPIC for GSI %u\n", gsi); 1121 return gsi; 1122 } 1123 1124 ioapic_pin = gsi - mp_ioapic_routing[ioapic].gsi_base; 1125 1126 #ifdef CONFIG_X86_32 1127 if (ioapic_renumber_irq) 1128 gsi = ioapic_renumber_irq(ioapic, gsi); 1129 #endif 1130 1131 /* 1132 * Avoid pin reprogramming. PRTs typically include entries 1133 * with redundant pin->gsi mappings (but unique PCI devices); 1134 * we only program the IOAPIC on the first. 1135 */ 1136 if (ioapic_pin > MP_MAX_IOAPIC_PIN) { 1137 printk(KERN_ERR "Invalid reference to IOAPIC pin " 1138 "%d-%d\n", mp_ioapic_routing[ioapic].apic_id, 1139 ioapic_pin); 1140 return gsi; 1141 } 1142 if (test_bit(ioapic_pin, mp_ioapic_routing[ioapic].pin_programmed)) { 1143 pr_debug(KERN_DEBUG "Pin %d-%d already programmed\n", 1144 mp_ioapic_routing[ioapic].apic_id, ioapic_pin); 1145 #ifdef CONFIG_X86_32 1146 return (gsi < IRQ_COMPRESSION_START ? gsi : gsi_to_irq[gsi]); 1147 #else 1148 return gsi; 1149 #endif 1150 } 1151 1152 set_bit(ioapic_pin, mp_ioapic_routing[ioapic].pin_programmed); 1153 #ifdef CONFIG_X86_32 1154 /* 1155 * For GSI >= 64, use IRQ compression 1156 */ 1157 if ((gsi >= IRQ_COMPRESSION_START) 1158 && (triggering == ACPI_LEVEL_SENSITIVE)) { 1159 /* 1160 * For PCI devices assign IRQs in order, avoiding gaps 1161 * due to unused I/O APIC pins. 1162 */ 1163 int irq = gsi; 1164 if (gsi < MAX_GSI_NUM) { 1165 /* 1166 * Retain the VIA chipset work-around (gsi > 15), but 1167 * avoid a problem where the 8254 timer (IRQ0) is setup 1168 * via an override (so it's not on pin 0 of the ioapic), 1169 * and at the same time, the pin 0 interrupt is a PCI 1170 * type. The gsi > 15 test could cause these two pins 1171 * to be shared as IRQ0, and they are not shareable. 1172 * So test for this condition, and if necessary, avoid 1173 * the pin collision. 1174 */ 1175 gsi = pci_irq++; 1176 /* 1177 * Don't assign IRQ used by ACPI SCI 1178 */ 1179 if (gsi == acpi_gbl_FADT.sci_interrupt) 1180 gsi = pci_irq++; 1181 gsi_to_irq[irq] = gsi; 1182 } else { 1183 printk(KERN_ERR "GSI %u is too high\n", gsi); 1184 return gsi; 1185 } 1186 } 1187 #endif 1188 io_apic_set_pci_routing(ioapic, ioapic_pin, gsi, 1189 triggering == ACPI_EDGE_SENSITIVE ? 0 : 1, 1190 polarity == ACPI_ACTIVE_HIGH ? 0 : 1); 1191 return gsi; 1192 } 1193 1194 int mp_config_acpi_gsi(unsigned char number, unsigned int devfn, u8 pin, 1195 u32 gsi, int triggering, int polarity) 1196 { 1197 #ifdef CONFIG_X86_MPPARSE 1198 struct mp_config_intsrc mp_irq; 1199 int ioapic; 1200 1201 if (!acpi_ioapic) 1202 return 0; 1203 1204 /* print the entry should happen on mptable identically */ 1205 mp_irq.mp_type = MP_INTSRC; 1206 mp_irq.mp_irqtype = mp_INT; 1207 mp_irq.mp_irqflag = (triggering == ACPI_EDGE_SENSITIVE ? 4 : 0x0c) | 1208 (polarity == ACPI_ACTIVE_HIGH ? 1 : 3); 1209 mp_irq.mp_srcbus = number; 1210 mp_irq.mp_srcbusirq = (((devfn >> 3) & 0x1f) << 2) | ((pin - 1) & 3); 1211 ioapic = mp_find_ioapic(gsi); 1212 mp_irq.mp_dstapic = mp_ioapic_routing[ioapic].apic_id; 1213 mp_irq.mp_dstirq = gsi - mp_ioapic_routing[ioapic].gsi_base; 1214 1215 save_mp_irq(&mp_irq); 1216 #endif 1217 return 0; 1218 } 1219 1220 /* 1221 * Parse IOAPIC related entries in MADT 1222 * returns 0 on success, < 0 on error 1223 */ 1224 static int __init acpi_parse_madt_ioapic_entries(void) 1225 { 1226 int count; 1227 1228 /* 1229 * ACPI interpreter is required to complete interrupt setup, 1230 * so if it is off, don't enumerate the io-apics with ACPI. 1231 * If MPS is present, it will handle them, 1232 * otherwise the system will stay in PIC mode 1233 */ 1234 if (acpi_disabled || acpi_noirq) { 1235 return -ENODEV; 1236 } 1237 1238 if (!cpu_has_apic) 1239 return -ENODEV; 1240 1241 /* 1242 * if "noapic" boot option, don't look for IO-APICs 1243 */ 1244 if (skip_ioapic_setup) { 1245 printk(KERN_INFO PREFIX "Skipping IOAPIC probe " 1246 "due to 'noapic' option.\n"); 1247 return -ENODEV; 1248 } 1249 1250 count = 1251 acpi_table_parse_madt(ACPI_MADT_TYPE_IO_APIC, acpi_parse_ioapic, 1252 MAX_IO_APICS); 1253 if (!count) { 1254 printk(KERN_ERR PREFIX "No IOAPIC entries present\n"); 1255 return -ENODEV; 1256 } else if (count < 0) { 1257 printk(KERN_ERR PREFIX "Error parsing IOAPIC entry\n"); 1258 return count; 1259 } 1260 1261 count = 1262 acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE, acpi_parse_int_src_ovr, 1263 NR_IRQ_VECTORS); 1264 if (count < 0) { 1265 printk(KERN_ERR PREFIX 1266 "Error parsing interrupt source overrides entry\n"); 1267 /* TBD: Cleanup to allow fallback to MPS */ 1268 return count; 1269 } 1270 1271 /* 1272 * If BIOS did not supply an INT_SRC_OVR for the SCI 1273 * pretend we got one so we can set the SCI flags. 1274 */ 1275 if (!acpi_sci_override_gsi) 1276 acpi_sci_ioapic_setup(acpi_gbl_FADT.sci_interrupt, 0, 0); 1277 1278 /* Fill in identity legacy mapings where no override */ 1279 mp_config_acpi_legacy_irqs(); 1280 1281 count = 1282 acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE, acpi_parse_nmi_src, 1283 NR_IRQ_VECTORS); 1284 if (count < 0) { 1285 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n"); 1286 /* TBD: Cleanup to allow fallback to MPS */ 1287 return count; 1288 } 1289 1290 return 0; 1291 } 1292 #else 1293 static inline int acpi_parse_madt_ioapic_entries(void) 1294 { 1295 return -1; 1296 } 1297 #endif /* !CONFIG_X86_IO_APIC */ 1298 1299 static void __init early_acpi_process_madt(void) 1300 { 1301 #ifdef CONFIG_X86_LOCAL_APIC 1302 int error; 1303 1304 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) { 1305 1306 /* 1307 * Parse MADT LAPIC entries 1308 */ 1309 error = early_acpi_parse_madt_lapic_addr_ovr(); 1310 if (!error) { 1311 acpi_lapic = 1; 1312 smp_found_config = 1; 1313 } 1314 if (error == -EINVAL) { 1315 /* 1316 * Dell Precision Workstation 410, 610 come here. 1317 */ 1318 printk(KERN_ERR PREFIX 1319 "Invalid BIOS MADT, disabling ACPI\n"); 1320 disable_acpi(); 1321 } 1322 } 1323 #endif 1324 } 1325 1326 static void __init acpi_process_madt(void) 1327 { 1328 #ifdef CONFIG_X86_LOCAL_APIC 1329 int error; 1330 1331 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) { 1332 1333 /* 1334 * Parse MADT LAPIC entries 1335 */ 1336 error = acpi_parse_madt_lapic_entries(); 1337 if (!error) { 1338 acpi_lapic = 1; 1339 1340 #ifdef CONFIG_X86_GENERICARCH 1341 generic_bigsmp_probe(); 1342 #endif 1343 /* 1344 * Parse MADT IO-APIC entries 1345 */ 1346 error = acpi_parse_madt_ioapic_entries(); 1347 if (!error) { 1348 acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC; 1349 acpi_irq_balance_set(NULL); 1350 acpi_ioapic = 1; 1351 1352 smp_found_config = 1; 1353 setup_apic_routing(); 1354 } 1355 } 1356 if (error == -EINVAL) { 1357 /* 1358 * Dell Precision Workstation 410, 610 come here. 1359 */ 1360 printk(KERN_ERR PREFIX 1361 "Invalid BIOS MADT, disabling ACPI\n"); 1362 disable_acpi(); 1363 } 1364 } 1365 #endif 1366 return; 1367 } 1368 1369 static int __init disable_acpi_irq(const struct dmi_system_id *d) 1370 { 1371 if (!acpi_force) { 1372 printk(KERN_NOTICE "%s detected: force use of acpi=noirq\n", 1373 d->ident); 1374 acpi_noirq_set(); 1375 } 1376 return 0; 1377 } 1378 1379 static int __init disable_acpi_pci(const struct dmi_system_id *d) 1380 { 1381 if (!acpi_force) { 1382 printk(KERN_NOTICE "%s detected: force use of pci=noacpi\n", 1383 d->ident); 1384 acpi_disable_pci(); 1385 } 1386 return 0; 1387 } 1388 1389 static int __init dmi_disable_acpi(const struct dmi_system_id *d) 1390 { 1391 if (!acpi_force) { 1392 printk(KERN_NOTICE "%s detected: acpi off\n", d->ident); 1393 disable_acpi(); 1394 } else { 1395 printk(KERN_NOTICE 1396 "Warning: DMI blacklist says broken, but acpi forced\n"); 1397 } 1398 return 0; 1399 } 1400 1401 /* 1402 * Limit ACPI to CPU enumeration for HT 1403 */ 1404 static int __init force_acpi_ht(const struct dmi_system_id *d) 1405 { 1406 if (!acpi_force) { 1407 printk(KERN_NOTICE "%s detected: force use of acpi=ht\n", 1408 d->ident); 1409 disable_acpi(); 1410 acpi_ht = 1; 1411 } else { 1412 printk(KERN_NOTICE 1413 "Warning: acpi=force overrules DMI blacklist: acpi=ht\n"); 1414 } 1415 return 0; 1416 } 1417 1418 /* 1419 * Force ignoring BIOS IRQ0 pin2 override 1420 */ 1421 static int __init dmi_ignore_irq0_timer_override(const struct dmi_system_id *d) 1422 { 1423 pr_notice("%s detected: Ignoring BIOS IRQ0 pin2 override\n", d->ident); 1424 acpi_skip_timer_override = 1; 1425 return 0; 1426 } 1427 1428 /* 1429 * If your system is blacklisted here, but you find that acpi=force 1430 * works for you, please contact acpi-devel@sourceforge.net 1431 */ 1432 static struct dmi_system_id __initdata acpi_dmi_table[] = { 1433 /* 1434 * Boxes that need ACPI disabled 1435 */ 1436 { 1437 .callback = dmi_disable_acpi, 1438 .ident = "IBM Thinkpad", 1439 .matches = { 1440 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), 1441 DMI_MATCH(DMI_BOARD_NAME, "2629H1G"), 1442 }, 1443 }, 1444 1445 /* 1446 * Boxes that need acpi=ht 1447 */ 1448 { 1449 .callback = force_acpi_ht, 1450 .ident = "FSC Primergy T850", 1451 .matches = { 1452 DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"), 1453 DMI_MATCH(DMI_PRODUCT_NAME, "PRIMERGY T850"), 1454 }, 1455 }, 1456 { 1457 .callback = force_acpi_ht, 1458 .ident = "HP VISUALIZE NT Workstation", 1459 .matches = { 1460 DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"), 1461 DMI_MATCH(DMI_PRODUCT_NAME, "HP VISUALIZE NT Workstation"), 1462 }, 1463 }, 1464 { 1465 .callback = force_acpi_ht, 1466 .ident = "Compaq Workstation W8000", 1467 .matches = { 1468 DMI_MATCH(DMI_SYS_VENDOR, "Compaq"), 1469 DMI_MATCH(DMI_PRODUCT_NAME, "Workstation W8000"), 1470 }, 1471 }, 1472 { 1473 .callback = force_acpi_ht, 1474 .ident = "ASUS P4B266", 1475 .matches = { 1476 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."), 1477 DMI_MATCH(DMI_BOARD_NAME, "P4B266"), 1478 }, 1479 }, 1480 { 1481 .callback = force_acpi_ht, 1482 .ident = "ASUS P2B-DS", 1483 .matches = { 1484 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."), 1485 DMI_MATCH(DMI_BOARD_NAME, "P2B-DS"), 1486 }, 1487 }, 1488 { 1489 .callback = force_acpi_ht, 1490 .ident = "ASUS CUR-DLS", 1491 .matches = { 1492 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."), 1493 DMI_MATCH(DMI_BOARD_NAME, "CUR-DLS"), 1494 }, 1495 }, 1496 { 1497 .callback = force_acpi_ht, 1498 .ident = "ABIT i440BX-W83977", 1499 .matches = { 1500 DMI_MATCH(DMI_BOARD_VENDOR, "ABIT <http://www.abit.com>"), 1501 DMI_MATCH(DMI_BOARD_NAME, "i440BX-W83977 (BP6)"), 1502 }, 1503 }, 1504 { 1505 .callback = force_acpi_ht, 1506 .ident = "IBM Bladecenter", 1507 .matches = { 1508 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), 1509 DMI_MATCH(DMI_BOARD_NAME, "IBM eServer BladeCenter HS20"), 1510 }, 1511 }, 1512 { 1513 .callback = force_acpi_ht, 1514 .ident = "IBM eServer xSeries 360", 1515 .matches = { 1516 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), 1517 DMI_MATCH(DMI_BOARD_NAME, "eServer xSeries 360"), 1518 }, 1519 }, 1520 { 1521 .callback = force_acpi_ht, 1522 .ident = "IBM eserver xSeries 330", 1523 .matches = { 1524 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), 1525 DMI_MATCH(DMI_BOARD_NAME, "eserver xSeries 330"), 1526 }, 1527 }, 1528 { 1529 .callback = force_acpi_ht, 1530 .ident = "IBM eserver xSeries 440", 1531 .matches = { 1532 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), 1533 DMI_MATCH(DMI_PRODUCT_NAME, "eserver xSeries 440"), 1534 }, 1535 }, 1536 1537 /* 1538 * Boxes that need ACPI PCI IRQ routing disabled 1539 */ 1540 { 1541 .callback = disable_acpi_irq, 1542 .ident = "ASUS A7V", 1543 .matches = { 1544 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC"), 1545 DMI_MATCH(DMI_BOARD_NAME, "<A7V>"), 1546 /* newer BIOS, Revision 1011, does work */ 1547 DMI_MATCH(DMI_BIOS_VERSION, 1548 "ASUS A7V ACPI BIOS Revision 1007"), 1549 }, 1550 }, 1551 { 1552 /* 1553 * Latest BIOS for IBM 600E (1.16) has bad pcinum 1554 * for LPC bridge, which is needed for the PCI 1555 * interrupt links to work. DSDT fix is in bug 5966. 1556 * 2645, 2646 model numbers are shared with 600/600E/600X 1557 */ 1558 .callback = disable_acpi_irq, 1559 .ident = "IBM Thinkpad 600 Series 2645", 1560 .matches = { 1561 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), 1562 DMI_MATCH(DMI_BOARD_NAME, "2645"), 1563 }, 1564 }, 1565 { 1566 .callback = disable_acpi_irq, 1567 .ident = "IBM Thinkpad 600 Series 2646", 1568 .matches = { 1569 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), 1570 DMI_MATCH(DMI_BOARD_NAME, "2646"), 1571 }, 1572 }, 1573 /* 1574 * Boxes that need ACPI PCI IRQ routing and PCI scan disabled 1575 */ 1576 { /* _BBN 0 bug */ 1577 .callback = disable_acpi_pci, 1578 .ident = "ASUS PR-DLS", 1579 .matches = { 1580 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."), 1581 DMI_MATCH(DMI_BOARD_NAME, "PR-DLS"), 1582 DMI_MATCH(DMI_BIOS_VERSION, 1583 "ASUS PR-DLS ACPI BIOS Revision 1010"), 1584 DMI_MATCH(DMI_BIOS_DATE, "03/21/2003") 1585 }, 1586 }, 1587 { 1588 .callback = disable_acpi_pci, 1589 .ident = "Acer TravelMate 36x Laptop", 1590 .matches = { 1591 DMI_MATCH(DMI_SYS_VENDOR, "Acer"), 1592 DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"), 1593 }, 1594 }, 1595 /* 1596 * HP laptops which use a DSDT reporting as HP/SB400/10000, 1597 * which includes some code which overrides all temperature 1598 * trip points to 16C if the INTIN2 input of the I/O APIC 1599 * is enabled. This input is incorrectly designated the 1600 * ISA IRQ 0 via an interrupt source override even though 1601 * it is wired to the output of the master 8259A and INTIN0 1602 * is not connected at all. Force ignoring BIOS IRQ0 pin2 1603 * override in that cases. 1604 */ 1605 { 1606 .callback = dmi_ignore_irq0_timer_override, 1607 .ident = "HP nx6115 laptop", 1608 .matches = { 1609 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 1610 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6115"), 1611 }, 1612 }, 1613 { 1614 .callback = dmi_ignore_irq0_timer_override, 1615 .ident = "HP NX6125 laptop", 1616 .matches = { 1617 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 1618 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6125"), 1619 }, 1620 }, 1621 { 1622 .callback = dmi_ignore_irq0_timer_override, 1623 .ident = "HP NX6325 laptop", 1624 .matches = { 1625 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 1626 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6325"), 1627 }, 1628 }, 1629 { 1630 .callback = dmi_ignore_irq0_timer_override, 1631 .ident = "HP 6715b laptop", 1632 .matches = { 1633 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 1634 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq 6715b"), 1635 }, 1636 }, 1637 {} 1638 }; 1639 1640 /* 1641 * acpi_boot_table_init() and acpi_boot_init() 1642 * called from setup_arch(), always. 1643 * 1. checksums all tables 1644 * 2. enumerates lapics 1645 * 3. enumerates io-apics 1646 * 1647 * acpi_table_init() is separate to allow reading SRAT without 1648 * other side effects. 1649 * 1650 * side effects of acpi_boot_init: 1651 * acpi_lapic = 1 if LAPIC found 1652 * acpi_ioapic = 1 if IOAPIC found 1653 * if (acpi_lapic && acpi_ioapic) smp_found_config = 1; 1654 * if acpi_blacklisted() acpi_disabled = 1; 1655 * acpi_irq_model=... 1656 * ... 1657 * 1658 * return value: (currently ignored) 1659 * 0: success 1660 * !0: failure 1661 */ 1662 1663 int __init acpi_boot_table_init(void) 1664 { 1665 int error; 1666 1667 dmi_check_system(acpi_dmi_table); 1668 1669 /* 1670 * If acpi_disabled, bail out 1671 * One exception: acpi=ht continues far enough to enumerate LAPICs 1672 */ 1673 if (acpi_disabled && !acpi_ht) 1674 return 1; 1675 1676 /* 1677 * Initialize the ACPI boot-time table parser. 1678 */ 1679 error = acpi_table_init(); 1680 if (error) { 1681 disable_acpi(); 1682 return error; 1683 } 1684 1685 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf); 1686 1687 /* 1688 * blacklist may disable ACPI entirely 1689 */ 1690 error = acpi_blacklisted(); 1691 if (error) { 1692 if (acpi_force) { 1693 printk(KERN_WARNING PREFIX "acpi=force override\n"); 1694 } else { 1695 printk(KERN_WARNING PREFIX "Disabling ACPI support\n"); 1696 disable_acpi(); 1697 return error; 1698 } 1699 } 1700 1701 return 0; 1702 } 1703 1704 int __init early_acpi_boot_init(void) 1705 { 1706 /* 1707 * If acpi_disabled, bail out 1708 * One exception: acpi=ht continues far enough to enumerate LAPICs 1709 */ 1710 if (acpi_disabled && !acpi_ht) 1711 return 1; 1712 1713 /* 1714 * Process the Multiple APIC Description Table (MADT), if present 1715 */ 1716 early_acpi_process_madt(); 1717 1718 return 0; 1719 } 1720 1721 int __init acpi_boot_init(void) 1722 { 1723 /* 1724 * If acpi_disabled, bail out 1725 * One exception: acpi=ht continues far enough to enumerate LAPICs 1726 */ 1727 if (acpi_disabled && !acpi_ht) 1728 return 1; 1729 1730 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf); 1731 1732 /* 1733 * set sci_int and PM timer address 1734 */ 1735 acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt); 1736 1737 /* 1738 * Process the Multiple APIC Description Table (MADT), if present 1739 */ 1740 acpi_process_madt(); 1741 1742 acpi_table_parse(ACPI_SIG_HPET, acpi_parse_hpet); 1743 1744 return 0; 1745 } 1746 1747 static int __init parse_acpi(char *arg) 1748 { 1749 if (!arg) 1750 return -EINVAL; 1751 1752 /* "acpi=off" disables both ACPI table parsing and interpreter */ 1753 if (strcmp(arg, "off") == 0) { 1754 disable_acpi(); 1755 } 1756 /* acpi=force to over-ride black-list */ 1757 else if (strcmp(arg, "force") == 0) { 1758 acpi_force = 1; 1759 acpi_ht = 1; 1760 acpi_disabled = 0; 1761 } 1762 /* acpi=strict disables out-of-spec workarounds */ 1763 else if (strcmp(arg, "strict") == 0) { 1764 acpi_strict = 1; 1765 } 1766 /* Limit ACPI just to boot-time to enable HT */ 1767 else if (strcmp(arg, "ht") == 0) { 1768 if (!acpi_force) 1769 disable_acpi(); 1770 acpi_ht = 1; 1771 } 1772 /* "acpi=noirq" disables ACPI interrupt routing */ 1773 else if (strcmp(arg, "noirq") == 0) { 1774 acpi_noirq_set(); 1775 } else { 1776 /* Core will printk when we return error. */ 1777 return -EINVAL; 1778 } 1779 return 0; 1780 } 1781 early_param("acpi", parse_acpi); 1782 1783 /* FIXME: Using pci= for an ACPI parameter is a travesty. */ 1784 static int __init parse_pci(char *arg) 1785 { 1786 if (arg && strcmp(arg, "noacpi") == 0) 1787 acpi_disable_pci(); 1788 return 0; 1789 } 1790 early_param("pci", parse_pci); 1791 1792 int __init acpi_mps_check(void) 1793 { 1794 #if defined(CONFIG_X86_LOCAL_APIC) && !defined(CONFIG_X86_MPPARSE) 1795 /* mptable code is not built-in*/ 1796 if (acpi_disabled || acpi_noirq) { 1797 printk(KERN_WARNING "MPS support code is not built-in.\n" 1798 "Using acpi=off or acpi=noirq or pci=noacpi " 1799 "may have problem\n"); 1800 return 1; 1801 } 1802 #endif 1803 return 0; 1804 } 1805 1806 #ifdef CONFIG_X86_IO_APIC 1807 static int __init parse_acpi_skip_timer_override(char *arg) 1808 { 1809 acpi_skip_timer_override = 1; 1810 return 0; 1811 } 1812 early_param("acpi_skip_timer_override", parse_acpi_skip_timer_override); 1813 1814 static int __init parse_acpi_use_timer_override(char *arg) 1815 { 1816 acpi_use_timer_override = 1; 1817 return 0; 1818 } 1819 early_param("acpi_use_timer_override", parse_acpi_use_timer_override); 1820 #endif /* CONFIG_X86_IO_APIC */ 1821 1822 static int __init setup_acpi_sci(char *s) 1823 { 1824 if (!s) 1825 return -EINVAL; 1826 if (!strcmp(s, "edge")) 1827 acpi_sci_flags = ACPI_MADT_TRIGGER_EDGE | 1828 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK); 1829 else if (!strcmp(s, "level")) 1830 acpi_sci_flags = ACPI_MADT_TRIGGER_LEVEL | 1831 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK); 1832 else if (!strcmp(s, "high")) 1833 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_HIGH | 1834 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK); 1835 else if (!strcmp(s, "low")) 1836 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_LOW | 1837 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK); 1838 else 1839 return -EINVAL; 1840 return 0; 1841 } 1842 early_param("acpi_sci", setup_acpi_sci); 1843 1844 int __acpi_acquire_global_lock(unsigned int *lock) 1845 { 1846 unsigned int old, new, val; 1847 do { 1848 old = *lock; 1849 new = (((old & ~0x3) + 2) + ((old >> 1) & 0x1)); 1850 val = cmpxchg(lock, old, new); 1851 } while (unlikely (val != old)); 1852 return (new < 3) ? -1 : 0; 1853 } 1854 1855 int __acpi_release_global_lock(unsigned int *lock) 1856 { 1857 unsigned int old, new, val; 1858 do { 1859 old = *lock; 1860 new = old & ~0x3; 1861 val = cmpxchg(lock, old, new); 1862 } while (unlikely (val != old)); 1863 return old & 0x1; 1864 } 1865