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 if (boot_cpu_physical_apicid != -1U) 256 ver = apic_version[boot_cpu_physical_apicid]; 257 258 generic_processor_info(id, ver); 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_lapic_nmi(struct acpi_subtable_header * header, const unsigned long end) 322 { 323 struct acpi_madt_local_apic_nmi *lapic_nmi = NULL; 324 325 lapic_nmi = (struct acpi_madt_local_apic_nmi *)header; 326 327 if (BAD_MADT_ENTRY(lapic_nmi, end)) 328 return -EINVAL; 329 330 acpi_table_print_madt_entry(header); 331 332 if (lapic_nmi->lint != 1) 333 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n"); 334 335 return 0; 336 } 337 338 #endif /*CONFIG_X86_LOCAL_APIC */ 339 340 #ifdef CONFIG_X86_IO_APIC 341 342 static int __init 343 acpi_parse_ioapic(struct acpi_subtable_header * header, const unsigned long end) 344 { 345 struct acpi_madt_io_apic *ioapic = NULL; 346 347 ioapic = (struct acpi_madt_io_apic *)header; 348 349 if (BAD_MADT_ENTRY(ioapic, end)) 350 return -EINVAL; 351 352 acpi_table_print_madt_entry(header); 353 354 mp_register_ioapic(ioapic->id, 355 ioapic->address, ioapic->global_irq_base); 356 357 return 0; 358 } 359 360 /* 361 * Parse Interrupt Source Override for the ACPI SCI 362 */ 363 static void __init acpi_sci_ioapic_setup(u32 gsi, u16 polarity, u16 trigger) 364 { 365 if (trigger == 0) /* compatible SCI trigger is level */ 366 trigger = 3; 367 368 if (polarity == 0) /* compatible SCI polarity is low */ 369 polarity = 3; 370 371 /* Command-line over-ride via acpi_sci= */ 372 if (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) 373 trigger = (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2; 374 375 if (acpi_sci_flags & ACPI_MADT_POLARITY_MASK) 376 polarity = acpi_sci_flags & ACPI_MADT_POLARITY_MASK; 377 378 /* 379 * mp_config_acpi_legacy_irqs() already setup IRQs < 16 380 * If GSI is < 16, this will update its flags, 381 * else it will create a new mp_irqs[] entry. 382 */ 383 mp_override_legacy_irq(gsi, polarity, trigger, gsi); 384 385 /* 386 * stash over-ride to indicate we've been here 387 * and for later update of acpi_gbl_FADT 388 */ 389 acpi_sci_override_gsi = gsi; 390 return; 391 } 392 393 static int __init 394 acpi_parse_int_src_ovr(struct acpi_subtable_header * header, 395 const unsigned long end) 396 { 397 struct acpi_madt_interrupt_override *intsrc = NULL; 398 399 intsrc = (struct acpi_madt_interrupt_override *)header; 400 401 if (BAD_MADT_ENTRY(intsrc, end)) 402 return -EINVAL; 403 404 acpi_table_print_madt_entry(header); 405 406 if (intsrc->source_irq == acpi_gbl_FADT.sci_interrupt) { 407 acpi_sci_ioapic_setup(intsrc->global_irq, 408 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK, 409 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2); 410 return 0; 411 } 412 413 if (acpi_skip_timer_override && 414 intsrc->source_irq == 0 && intsrc->global_irq == 2) { 415 printk(PREFIX "BIOS IRQ0 pin2 override ignored.\n"); 416 return 0; 417 } 418 419 mp_override_legacy_irq(intsrc->source_irq, 420 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK, 421 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2, 422 intsrc->global_irq); 423 424 return 0; 425 } 426 427 static int __init 428 acpi_parse_nmi_src(struct acpi_subtable_header * header, const unsigned long end) 429 { 430 struct acpi_madt_nmi_source *nmi_src = NULL; 431 432 nmi_src = (struct acpi_madt_nmi_source *)header; 433 434 if (BAD_MADT_ENTRY(nmi_src, end)) 435 return -EINVAL; 436 437 acpi_table_print_madt_entry(header); 438 439 /* TBD: Support nimsrc entries? */ 440 441 return 0; 442 } 443 444 #endif /* CONFIG_X86_IO_APIC */ 445 446 /* 447 * acpi_pic_sci_set_trigger() 448 * 449 * use ELCR to set PIC-mode trigger type for SCI 450 * 451 * If a PIC-mode SCI is not recognized or gives spurious IRQ7's 452 * it may require Edge Trigger -- use "acpi_sci=edge" 453 * 454 * Port 0x4d0-4d1 are ECLR1 and ECLR2, the Edge/Level Control Registers 455 * for the 8259 PIC. bit[n] = 1 means irq[n] is Level, otherwise Edge. 456 * ECLR1 is IRQs 0-7 (IRQ 0, 1, 2 must be 0) 457 * ECLR2 is IRQs 8-15 (IRQ 8, 13 must be 0) 458 */ 459 460 void __init acpi_pic_sci_set_trigger(unsigned int irq, u16 trigger) 461 { 462 unsigned int mask = 1 << irq; 463 unsigned int old, new; 464 465 /* Real old ELCR mask */ 466 old = inb(0x4d0) | (inb(0x4d1) << 8); 467 468 /* 469 * If we use ACPI to set PCI IRQs, then we should clear ELCR 470 * since we will set it correctly as we enable the PCI irq 471 * routing. 472 */ 473 new = acpi_noirq ? old : 0; 474 475 /* 476 * Update SCI information in the ELCR, it isn't in the PCI 477 * routing tables.. 478 */ 479 switch (trigger) { 480 case 1: /* Edge - clear */ 481 new &= ~mask; 482 break; 483 case 3: /* Level - set */ 484 new |= mask; 485 break; 486 } 487 488 if (old == new) 489 return; 490 491 printk(PREFIX "setting ELCR to %04x (from %04x)\n", new, old); 492 outb(new, 0x4d0); 493 outb(new >> 8, 0x4d1); 494 } 495 496 int acpi_gsi_to_irq(u32 gsi, unsigned int *irq) 497 { 498 *irq = gsi; 499 return 0; 500 } 501 502 /* 503 * success: return IRQ number (>=0) 504 * failure: return < 0 505 */ 506 int acpi_register_gsi(u32 gsi, int triggering, int polarity) 507 { 508 unsigned int irq; 509 unsigned int plat_gsi = gsi; 510 511 #ifdef CONFIG_PCI 512 /* 513 * Make sure all (legacy) PCI IRQs are set as level-triggered. 514 */ 515 if (acpi_irq_model == ACPI_IRQ_MODEL_PIC) { 516 if (triggering == ACPI_LEVEL_SENSITIVE) 517 eisa_set_level_irq(gsi); 518 } 519 #endif 520 521 #ifdef CONFIG_X86_IO_APIC 522 if (acpi_irq_model == ACPI_IRQ_MODEL_IOAPIC) { 523 plat_gsi = mp_register_gsi(gsi, triggering, polarity); 524 } 525 #endif 526 acpi_gsi_to_irq(plat_gsi, &irq); 527 return irq; 528 } 529 530 /* 531 * ACPI based hotplug support for CPU 532 */ 533 #ifdef CONFIG_ACPI_HOTPLUG_CPU 534 535 static int __cpuinit _acpi_map_lsapic(acpi_handle handle, int *pcpu) 536 { 537 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; 538 union acpi_object *obj; 539 struct acpi_madt_local_apic *lapic; 540 cpumask_t tmp_map, new_map; 541 u8 physid; 542 int cpu; 543 544 if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer))) 545 return -EINVAL; 546 547 if (!buffer.length || !buffer.pointer) 548 return -EINVAL; 549 550 obj = buffer.pointer; 551 if (obj->type != ACPI_TYPE_BUFFER || 552 obj->buffer.length < sizeof(*lapic)) { 553 kfree(buffer.pointer); 554 return -EINVAL; 555 } 556 557 lapic = (struct acpi_madt_local_apic *)obj->buffer.pointer; 558 559 if (lapic->header.type != ACPI_MADT_TYPE_LOCAL_APIC || 560 !(lapic->lapic_flags & ACPI_MADT_ENABLED)) { 561 kfree(buffer.pointer); 562 return -EINVAL; 563 } 564 565 physid = lapic->id; 566 567 kfree(buffer.pointer); 568 buffer.length = ACPI_ALLOCATE_BUFFER; 569 buffer.pointer = NULL; 570 571 tmp_map = cpu_present_map; 572 acpi_register_lapic(physid, lapic->lapic_flags & ACPI_MADT_ENABLED); 573 574 /* 575 * If mp_register_lapic successfully generates a new logical cpu 576 * number, then the following will get us exactly what was mapped 577 */ 578 cpus_andnot(new_map, cpu_present_map, tmp_map); 579 if (cpus_empty(new_map)) { 580 printk ("Unable to map lapic to logical cpu number\n"); 581 return -EINVAL; 582 } 583 584 cpu = first_cpu(new_map); 585 586 *pcpu = cpu; 587 return 0; 588 } 589 590 /* wrapper to silence section mismatch warning */ 591 int __ref acpi_map_lsapic(acpi_handle handle, int *pcpu) 592 { 593 return _acpi_map_lsapic(handle, pcpu); 594 } 595 EXPORT_SYMBOL(acpi_map_lsapic); 596 597 int acpi_unmap_lsapic(int cpu) 598 { 599 per_cpu(x86_cpu_to_apicid, cpu) = -1; 600 cpu_clear(cpu, cpu_present_map); 601 num_processors--; 602 603 return (0); 604 } 605 606 EXPORT_SYMBOL(acpi_unmap_lsapic); 607 #endif /* CONFIG_ACPI_HOTPLUG_CPU */ 608 609 int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base) 610 { 611 /* TBD */ 612 return -EINVAL; 613 } 614 615 EXPORT_SYMBOL(acpi_register_ioapic); 616 617 int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base) 618 { 619 /* TBD */ 620 return -EINVAL; 621 } 622 623 EXPORT_SYMBOL(acpi_unregister_ioapic); 624 625 static int __init acpi_parse_sbf(struct acpi_table_header *table) 626 { 627 struct acpi_table_boot *sb; 628 629 sb = (struct acpi_table_boot *)table; 630 if (!sb) { 631 printk(KERN_WARNING PREFIX "Unable to map SBF\n"); 632 return -ENODEV; 633 } 634 635 sbf_port = sb->cmos_index; /* Save CMOS port */ 636 637 return 0; 638 } 639 640 #ifdef CONFIG_HPET_TIMER 641 #include <asm/hpet.h> 642 643 static struct __initdata resource *hpet_res; 644 645 static int __init acpi_parse_hpet(struct acpi_table_header *table) 646 { 647 struct acpi_table_hpet *hpet_tbl; 648 649 hpet_tbl = (struct acpi_table_hpet *)table; 650 if (!hpet_tbl) { 651 printk(KERN_WARNING PREFIX "Unable to map HPET\n"); 652 return -ENODEV; 653 } 654 655 if (hpet_tbl->address.space_id != ACPI_SPACE_MEM) { 656 printk(KERN_WARNING PREFIX "HPET timers must be located in " 657 "memory.\n"); 658 return -1; 659 } 660 661 hpet_address = hpet_tbl->address.address; 662 663 /* 664 * Some broken BIOSes advertise HPET at 0x0. We really do not 665 * want to allocate a resource there. 666 */ 667 if (!hpet_address) { 668 printk(KERN_WARNING PREFIX 669 "HPET id: %#x base: %#lx is invalid\n", 670 hpet_tbl->id, hpet_address); 671 return 0; 672 } 673 #ifdef CONFIG_X86_64 674 /* 675 * Some even more broken BIOSes advertise HPET at 676 * 0xfed0000000000000 instead of 0xfed00000. Fix it up and add 677 * some noise: 678 */ 679 if (hpet_address == 0xfed0000000000000UL) { 680 if (!hpet_force_user) { 681 printk(KERN_WARNING PREFIX "HPET id: %#x " 682 "base: 0xfed0000000000000 is bogus\n " 683 "try hpet=force on the kernel command line to " 684 "fix it up to 0xfed00000.\n", hpet_tbl->id); 685 hpet_address = 0; 686 return 0; 687 } 688 printk(KERN_WARNING PREFIX 689 "HPET id: %#x base: 0xfed0000000000000 fixed up " 690 "to 0xfed00000.\n", hpet_tbl->id); 691 hpet_address >>= 32; 692 } 693 #endif 694 printk(KERN_INFO PREFIX "HPET id: %#x base: %#lx\n", 695 hpet_tbl->id, hpet_address); 696 697 /* 698 * Allocate and initialize the HPET firmware resource for adding into 699 * the resource tree during the lateinit timeframe. 700 */ 701 #define HPET_RESOURCE_NAME_SIZE 9 702 hpet_res = alloc_bootmem(sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE); 703 704 hpet_res->name = (void *)&hpet_res[1]; 705 hpet_res->flags = IORESOURCE_MEM; 706 snprintf((char *)hpet_res->name, HPET_RESOURCE_NAME_SIZE, "HPET %u", 707 hpet_tbl->sequence); 708 709 hpet_res->start = hpet_address; 710 hpet_res->end = hpet_address + (1 * 1024) - 1; 711 712 return 0; 713 } 714 715 /* 716 * hpet_insert_resource inserts the HPET resources used into the resource 717 * tree. 718 */ 719 static __init int hpet_insert_resource(void) 720 { 721 if (!hpet_res) 722 return 1; 723 724 return insert_resource(&iomem_resource, hpet_res); 725 } 726 727 late_initcall(hpet_insert_resource); 728 729 #else 730 #define acpi_parse_hpet NULL 731 #endif 732 733 static int __init acpi_parse_fadt(struct acpi_table_header *table) 734 { 735 736 #ifdef CONFIG_X86_PM_TIMER 737 /* detect the location of the ACPI PM Timer */ 738 if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID) { 739 /* FADT rev. 2 */ 740 if (acpi_gbl_FADT.xpm_timer_block.space_id != 741 ACPI_ADR_SPACE_SYSTEM_IO) 742 return 0; 743 744 pmtmr_ioport = acpi_gbl_FADT.xpm_timer_block.address; 745 /* 746 * "X" fields are optional extensions to the original V1.0 747 * fields, so we must selectively expand V1.0 fields if the 748 * corresponding X field is zero. 749 */ 750 if (!pmtmr_ioport) 751 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block; 752 } else { 753 /* FADT rev. 1 */ 754 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block; 755 } 756 if (pmtmr_ioport) 757 printk(KERN_INFO PREFIX "PM-Timer IO Port: %#x\n", 758 pmtmr_ioport); 759 #endif 760 return 0; 761 } 762 763 #ifdef CONFIG_X86_LOCAL_APIC 764 /* 765 * Parse LAPIC entries in MADT 766 * returns 0 on success, < 0 on error 767 */ 768 769 static void __init acpi_register_lapic_address(unsigned long address) 770 { 771 mp_lapic_addr = address; 772 773 set_fixmap_nocache(FIX_APIC_BASE, address); 774 if (boot_cpu_physical_apicid == -1U) { 775 boot_cpu_physical_apicid = read_apic_id(); 776 apic_version[boot_cpu_physical_apicid] = 777 GET_APIC_VERSION(apic_read(APIC_LVR)); 778 } 779 } 780 781 static int __init early_acpi_parse_madt_lapic_addr_ovr(void) 782 { 783 int count; 784 785 if (!cpu_has_apic) 786 return -ENODEV; 787 788 /* 789 * Note that the LAPIC address is obtained from the MADT (32-bit value) 790 * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value). 791 */ 792 793 count = 794 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE, 795 acpi_parse_lapic_addr_ovr, 0); 796 if (count < 0) { 797 printk(KERN_ERR PREFIX 798 "Error parsing LAPIC address override entry\n"); 799 return count; 800 } 801 802 acpi_register_lapic_address(acpi_lapic_addr); 803 804 return count; 805 } 806 807 static int __init acpi_parse_madt_lapic_entries(void) 808 { 809 int count; 810 811 if (!cpu_has_apic) 812 return -ENODEV; 813 814 /* 815 * Note that the LAPIC address is obtained from the MADT (32-bit value) 816 * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value). 817 */ 818 819 count = 820 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE, 821 acpi_parse_lapic_addr_ovr, 0); 822 if (count < 0) { 823 printk(KERN_ERR PREFIX 824 "Error parsing LAPIC address override entry\n"); 825 return count; 826 } 827 828 acpi_register_lapic_address(acpi_lapic_addr); 829 830 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC, 831 acpi_parse_sapic, MAX_APICS); 832 833 if (!count) 834 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC, 835 acpi_parse_lapic, MAX_APICS); 836 if (!count) { 837 printk(KERN_ERR PREFIX "No LAPIC entries present\n"); 838 /* TBD: Cleanup to allow fallback to MPS */ 839 return -ENODEV; 840 } else if (count < 0) { 841 printk(KERN_ERR PREFIX "Error parsing LAPIC entry\n"); 842 /* TBD: Cleanup to allow fallback to MPS */ 843 return count; 844 } 845 846 count = 847 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI, acpi_parse_lapic_nmi, 0); 848 if (count < 0) { 849 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n"); 850 /* TBD: Cleanup to allow fallback to MPS */ 851 return count; 852 } 853 return 0; 854 } 855 #endif /* CONFIG_X86_LOCAL_APIC */ 856 857 #ifdef CONFIG_X86_IO_APIC 858 #define MP_ISA_BUS 0 859 860 #ifdef CONFIG_X86_ES7000 861 extern int es7000_plat; 862 #endif 863 864 static struct { 865 int apic_id; 866 int gsi_base; 867 int gsi_end; 868 DECLARE_BITMAP(pin_programmed, MP_MAX_IOAPIC_PIN + 1); 869 } mp_ioapic_routing[MAX_IO_APICS]; 870 871 static int mp_find_ioapic(int gsi) 872 { 873 int i = 0; 874 875 /* Find the IOAPIC that manages this GSI. */ 876 for (i = 0; i < nr_ioapics; i++) { 877 if ((gsi >= mp_ioapic_routing[i].gsi_base) 878 && (gsi <= mp_ioapic_routing[i].gsi_end)) 879 return i; 880 } 881 882 printk(KERN_ERR "ERROR: Unable to locate IOAPIC for GSI %d\n", gsi); 883 return -1; 884 } 885 886 static u8 __init uniq_ioapic_id(u8 id) 887 { 888 #ifdef CONFIG_X86_32 889 if ((boot_cpu_data.x86_vendor == X86_VENDOR_INTEL) && 890 !APIC_XAPIC(apic_version[boot_cpu_physical_apicid])) 891 return io_apic_get_unique_id(nr_ioapics, id); 892 else 893 return id; 894 #else 895 int i; 896 DECLARE_BITMAP(used, 256); 897 bitmap_zero(used, 256); 898 for (i = 0; i < nr_ioapics; i++) { 899 struct mp_config_ioapic *ia = &mp_ioapics[i]; 900 __set_bit(ia->mp_apicid, used); 901 } 902 if (!test_bit(id, used)) 903 return id; 904 return find_first_zero_bit(used, 256); 905 #endif 906 } 907 908 static int bad_ioapic(unsigned long address) 909 { 910 if (nr_ioapics >= MAX_IO_APICS) { 911 printk(KERN_ERR "ERROR: Max # of I/O APICs (%d) exceeded " 912 "(found %d)\n", MAX_IO_APICS, nr_ioapics); 913 panic("Recompile kernel with bigger MAX_IO_APICS!\n"); 914 } 915 if (!address) { 916 printk(KERN_ERR "WARNING: Bogus (zero) I/O APIC address" 917 " found in table, skipping!\n"); 918 return 1; 919 } 920 return 0; 921 } 922 923 void __init mp_register_ioapic(int id, u32 address, u32 gsi_base) 924 { 925 int idx = 0; 926 927 if (bad_ioapic(address)) 928 return; 929 930 idx = nr_ioapics; 931 932 mp_ioapics[idx].mp_type = MP_IOAPIC; 933 mp_ioapics[idx].mp_flags = MPC_APIC_USABLE; 934 mp_ioapics[idx].mp_apicaddr = address; 935 936 set_fixmap_nocache(FIX_IO_APIC_BASE_0 + idx, address); 937 mp_ioapics[idx].mp_apicid = uniq_ioapic_id(id); 938 #ifdef CONFIG_X86_32 939 mp_ioapics[idx].mp_apicver = io_apic_get_version(idx); 940 #else 941 mp_ioapics[idx].mp_apicver = 0; 942 #endif 943 /* 944 * Build basic GSI lookup table to facilitate gsi->io_apic lookups 945 * and to prevent reprogramming of IOAPIC pins (PCI GSIs). 946 */ 947 mp_ioapic_routing[idx].apic_id = mp_ioapics[idx].mp_apicid; 948 mp_ioapic_routing[idx].gsi_base = gsi_base; 949 mp_ioapic_routing[idx].gsi_end = gsi_base + 950 io_apic_get_redir_entries(idx); 951 952 printk(KERN_INFO "IOAPIC[%d]: apic_id %d, version %d, address 0x%lx, " 953 "GSI %d-%d\n", idx, mp_ioapics[idx].mp_apicid, 954 mp_ioapics[idx].mp_apicver, mp_ioapics[idx].mp_apicaddr, 955 mp_ioapic_routing[idx].gsi_base, mp_ioapic_routing[idx].gsi_end); 956 957 nr_ioapics++; 958 } 959 960 static void assign_to_mp_irq(struct mp_config_intsrc *m, 961 struct mp_config_intsrc *mp_irq) 962 { 963 memcpy(mp_irq, m, sizeof(struct mp_config_intsrc)); 964 } 965 966 static int mp_irq_cmp(struct mp_config_intsrc *mp_irq, 967 struct mp_config_intsrc *m) 968 { 969 return memcmp(mp_irq, m, sizeof(struct mp_config_intsrc)); 970 } 971 972 static void save_mp_irq(struct mp_config_intsrc *m) 973 { 974 int i; 975 976 for (i = 0; i < mp_irq_entries; i++) { 977 if (!mp_irq_cmp(&mp_irqs[i], m)) 978 return; 979 } 980 981 assign_to_mp_irq(m, &mp_irqs[mp_irq_entries]); 982 if (++mp_irq_entries == MAX_IRQ_SOURCES) 983 panic("Max # of irq sources exceeded!!\n"); 984 } 985 986 void __init mp_override_legacy_irq(u8 bus_irq, u8 polarity, u8 trigger, u32 gsi) 987 { 988 int ioapic; 989 int pin; 990 struct mp_config_intsrc mp_irq; 991 992 /* 993 * Convert 'gsi' to 'ioapic.pin'. 994 */ 995 ioapic = mp_find_ioapic(gsi); 996 if (ioapic < 0) 997 return; 998 pin = gsi - mp_ioapic_routing[ioapic].gsi_base; 999 1000 /* 1001 * TBD: This check is for faulty timer entries, where the override 1002 * erroneously sets the trigger to level, resulting in a HUGE 1003 * increase of timer interrupts! 1004 */ 1005 if ((bus_irq == 0) && (trigger == 3)) 1006 trigger = 1; 1007 1008 mp_irq.mp_type = MP_INTSRC; 1009 mp_irq.mp_irqtype = mp_INT; 1010 mp_irq.mp_irqflag = (trigger << 2) | polarity; 1011 mp_irq.mp_srcbus = MP_ISA_BUS; 1012 mp_irq.mp_srcbusirq = bus_irq; /* IRQ */ 1013 mp_irq.mp_dstapic = mp_ioapics[ioapic].mp_apicid; /* APIC ID */ 1014 mp_irq.mp_dstirq = pin; /* INTIN# */ 1015 1016 save_mp_irq(&mp_irq); 1017 } 1018 1019 void __init mp_config_acpi_legacy_irqs(void) 1020 { 1021 int i; 1022 int ioapic; 1023 unsigned int dstapic; 1024 struct mp_config_intsrc mp_irq; 1025 1026 #if defined (CONFIG_MCA) || defined (CONFIG_EISA) 1027 /* 1028 * Fabricate the legacy ISA bus (bus #31). 1029 */ 1030 mp_bus_id_to_type[MP_ISA_BUS] = MP_BUS_ISA; 1031 #endif 1032 set_bit(MP_ISA_BUS, mp_bus_not_pci); 1033 pr_debug("Bus #%d is ISA\n", MP_ISA_BUS); 1034 1035 #ifdef CONFIG_X86_ES7000 1036 /* 1037 * Older generations of ES7000 have no legacy identity mappings 1038 */ 1039 if (es7000_plat == 1) 1040 return; 1041 #endif 1042 1043 /* 1044 * Locate the IOAPIC that manages the ISA IRQs (0-15). 1045 */ 1046 ioapic = mp_find_ioapic(0); 1047 if (ioapic < 0) 1048 return; 1049 dstapic = mp_ioapics[ioapic].mp_apicid; 1050 1051 /* 1052 * Use the default configuration for the IRQs 0-15. Unless 1053 * overridden by (MADT) interrupt source override entries. 1054 */ 1055 for (i = 0; i < 16; i++) { 1056 int idx; 1057 1058 for (idx = 0; idx < mp_irq_entries; idx++) { 1059 struct mp_config_intsrc *irq = mp_irqs + idx; 1060 1061 /* Do we already have a mapping for this ISA IRQ? */ 1062 if (irq->mp_srcbus == MP_ISA_BUS 1063 && irq->mp_srcbusirq == i) 1064 break; 1065 1066 /* Do we already have a mapping for this IOAPIC pin */ 1067 if (irq->mp_dstapic == dstapic && 1068 irq->mp_dstirq == i) 1069 break; 1070 } 1071 1072 if (idx != mp_irq_entries) { 1073 printk(KERN_DEBUG "ACPI: IRQ%d used by override.\n", i); 1074 continue; /* IRQ already used */ 1075 } 1076 1077 mp_irq.mp_type = MP_INTSRC; 1078 mp_irq.mp_irqflag = 0; /* Conforming */ 1079 mp_irq.mp_srcbus = MP_ISA_BUS; 1080 mp_irq.mp_dstapic = dstapic; 1081 mp_irq.mp_irqtype = mp_INT; 1082 mp_irq.mp_srcbusirq = i; /* Identity mapped */ 1083 mp_irq.mp_dstirq = i; 1084 1085 save_mp_irq(&mp_irq); 1086 } 1087 } 1088 1089 int mp_register_gsi(u32 gsi, int triggering, int polarity) 1090 { 1091 int ioapic; 1092 int ioapic_pin; 1093 #ifdef CONFIG_X86_32 1094 #define MAX_GSI_NUM 4096 1095 #define IRQ_COMPRESSION_START 64 1096 1097 static int pci_irq = IRQ_COMPRESSION_START; 1098 /* 1099 * Mapping between Global System Interrupts, which 1100 * represent all possible interrupts, and IRQs 1101 * assigned to actual devices. 1102 */ 1103 static int gsi_to_irq[MAX_GSI_NUM]; 1104 #else 1105 1106 if (acpi_irq_model != ACPI_IRQ_MODEL_IOAPIC) 1107 return gsi; 1108 #endif 1109 1110 /* Don't set up the ACPI SCI because it's already set up */ 1111 if (acpi_gbl_FADT.sci_interrupt == gsi) 1112 return gsi; 1113 1114 ioapic = mp_find_ioapic(gsi); 1115 if (ioapic < 0) { 1116 printk(KERN_WARNING "No IOAPIC for GSI %u\n", gsi); 1117 return gsi; 1118 } 1119 1120 ioapic_pin = gsi - mp_ioapic_routing[ioapic].gsi_base; 1121 1122 #ifdef CONFIG_X86_32 1123 if (ioapic_renumber_irq) 1124 gsi = ioapic_renumber_irq(ioapic, gsi); 1125 #endif 1126 1127 /* 1128 * Avoid pin reprogramming. PRTs typically include entries 1129 * with redundant pin->gsi mappings (but unique PCI devices); 1130 * we only program the IOAPIC on the first. 1131 */ 1132 if (ioapic_pin > MP_MAX_IOAPIC_PIN) { 1133 printk(KERN_ERR "Invalid reference to IOAPIC pin " 1134 "%d-%d\n", mp_ioapic_routing[ioapic].apic_id, 1135 ioapic_pin); 1136 return gsi; 1137 } 1138 if (test_bit(ioapic_pin, mp_ioapic_routing[ioapic].pin_programmed)) { 1139 pr_debug(KERN_DEBUG "Pin %d-%d already programmed\n", 1140 mp_ioapic_routing[ioapic].apic_id, ioapic_pin); 1141 #ifdef CONFIG_X86_32 1142 return (gsi < IRQ_COMPRESSION_START ? gsi : gsi_to_irq[gsi]); 1143 #else 1144 return gsi; 1145 #endif 1146 } 1147 1148 set_bit(ioapic_pin, mp_ioapic_routing[ioapic].pin_programmed); 1149 #ifdef CONFIG_X86_32 1150 /* 1151 * For GSI >= 64, use IRQ compression 1152 */ 1153 if ((gsi >= IRQ_COMPRESSION_START) 1154 && (triggering == ACPI_LEVEL_SENSITIVE)) { 1155 /* 1156 * For PCI devices assign IRQs in order, avoiding gaps 1157 * due to unused I/O APIC pins. 1158 */ 1159 int irq = gsi; 1160 if (gsi < MAX_GSI_NUM) { 1161 /* 1162 * Retain the VIA chipset work-around (gsi > 15), but 1163 * avoid a problem where the 8254 timer (IRQ0) is setup 1164 * via an override (so it's not on pin 0 of the ioapic), 1165 * and at the same time, the pin 0 interrupt is a PCI 1166 * type. The gsi > 15 test could cause these two pins 1167 * to be shared as IRQ0, and they are not shareable. 1168 * So test for this condition, and if necessary, avoid 1169 * the pin collision. 1170 */ 1171 gsi = pci_irq++; 1172 /* 1173 * Don't assign IRQ used by ACPI SCI 1174 */ 1175 if (gsi == acpi_gbl_FADT.sci_interrupt) 1176 gsi = pci_irq++; 1177 gsi_to_irq[irq] = gsi; 1178 } else { 1179 printk(KERN_ERR "GSI %u is too high\n", gsi); 1180 return gsi; 1181 } 1182 } 1183 #endif 1184 io_apic_set_pci_routing(ioapic, ioapic_pin, gsi, 1185 triggering == ACPI_EDGE_SENSITIVE ? 0 : 1, 1186 polarity == ACPI_ACTIVE_HIGH ? 0 : 1); 1187 return gsi; 1188 } 1189 1190 int mp_config_acpi_gsi(unsigned char number, unsigned int devfn, u8 pin, 1191 u32 gsi, int triggering, int polarity) 1192 { 1193 #ifdef CONFIG_X86_MPPARSE 1194 struct mp_config_intsrc mp_irq; 1195 int ioapic; 1196 1197 if (!acpi_ioapic) 1198 return 0; 1199 1200 /* print the entry should happen on mptable identically */ 1201 mp_irq.mp_type = MP_INTSRC; 1202 mp_irq.mp_irqtype = mp_INT; 1203 mp_irq.mp_irqflag = (triggering == ACPI_EDGE_SENSITIVE ? 4 : 0x0c) | 1204 (polarity == ACPI_ACTIVE_HIGH ? 1 : 3); 1205 mp_irq.mp_srcbus = number; 1206 mp_irq.mp_srcbusirq = (((devfn >> 3) & 0x1f) << 2) | ((pin - 1) & 3); 1207 ioapic = mp_find_ioapic(gsi); 1208 mp_irq.mp_dstapic = mp_ioapic_routing[ioapic].apic_id; 1209 mp_irq.mp_dstirq = gsi - mp_ioapic_routing[ioapic].gsi_base; 1210 1211 save_mp_irq(&mp_irq); 1212 #endif 1213 return 0; 1214 } 1215 1216 /* 1217 * Parse IOAPIC related entries in MADT 1218 * returns 0 on success, < 0 on error 1219 */ 1220 static int __init acpi_parse_madt_ioapic_entries(void) 1221 { 1222 int count; 1223 1224 /* 1225 * ACPI interpreter is required to complete interrupt setup, 1226 * so if it is off, don't enumerate the io-apics with ACPI. 1227 * If MPS is present, it will handle them, 1228 * otherwise the system will stay in PIC mode 1229 */ 1230 if (acpi_disabled || acpi_noirq) { 1231 return -ENODEV; 1232 } 1233 1234 if (!cpu_has_apic) 1235 return -ENODEV; 1236 1237 /* 1238 * if "noapic" boot option, don't look for IO-APICs 1239 */ 1240 if (skip_ioapic_setup) { 1241 printk(KERN_INFO PREFIX "Skipping IOAPIC probe " 1242 "due to 'noapic' option.\n"); 1243 return -ENODEV; 1244 } 1245 1246 count = 1247 acpi_table_parse_madt(ACPI_MADT_TYPE_IO_APIC, acpi_parse_ioapic, 1248 MAX_IO_APICS); 1249 if (!count) { 1250 printk(KERN_ERR PREFIX "No IOAPIC entries present\n"); 1251 return -ENODEV; 1252 } else if (count < 0) { 1253 printk(KERN_ERR PREFIX "Error parsing IOAPIC entry\n"); 1254 return count; 1255 } 1256 1257 count = 1258 acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE, acpi_parse_int_src_ovr, 1259 NR_IRQ_VECTORS); 1260 if (count < 0) { 1261 printk(KERN_ERR PREFIX 1262 "Error parsing interrupt source overrides entry\n"); 1263 /* TBD: Cleanup to allow fallback to MPS */ 1264 return count; 1265 } 1266 1267 /* 1268 * If BIOS did not supply an INT_SRC_OVR for the SCI 1269 * pretend we got one so we can set the SCI flags. 1270 */ 1271 if (!acpi_sci_override_gsi) 1272 acpi_sci_ioapic_setup(acpi_gbl_FADT.sci_interrupt, 0, 0); 1273 1274 /* Fill in identity legacy mapings where no override */ 1275 mp_config_acpi_legacy_irqs(); 1276 1277 count = 1278 acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE, acpi_parse_nmi_src, 1279 NR_IRQ_VECTORS); 1280 if (count < 0) { 1281 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n"); 1282 /* TBD: Cleanup to allow fallback to MPS */ 1283 return count; 1284 } 1285 1286 return 0; 1287 } 1288 #else 1289 static inline int acpi_parse_madt_ioapic_entries(void) 1290 { 1291 return -1; 1292 } 1293 #endif /* !CONFIG_X86_IO_APIC */ 1294 1295 static void __init early_acpi_process_madt(void) 1296 { 1297 #ifdef CONFIG_X86_LOCAL_APIC 1298 int error; 1299 1300 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) { 1301 1302 /* 1303 * Parse MADT LAPIC entries 1304 */ 1305 error = early_acpi_parse_madt_lapic_addr_ovr(); 1306 if (!error) { 1307 acpi_lapic = 1; 1308 smp_found_config = 1; 1309 } 1310 if (error == -EINVAL) { 1311 /* 1312 * Dell Precision Workstation 410, 610 come here. 1313 */ 1314 printk(KERN_ERR PREFIX 1315 "Invalid BIOS MADT, disabling ACPI\n"); 1316 disable_acpi(); 1317 } 1318 } 1319 #endif 1320 } 1321 1322 static void __init acpi_process_madt(void) 1323 { 1324 #ifdef CONFIG_X86_LOCAL_APIC 1325 int error; 1326 1327 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) { 1328 1329 /* 1330 * Parse MADT LAPIC entries 1331 */ 1332 error = acpi_parse_madt_lapic_entries(); 1333 if (!error) { 1334 acpi_lapic = 1; 1335 1336 #ifdef CONFIG_X86_GENERICARCH 1337 generic_bigsmp_probe(); 1338 #endif 1339 /* 1340 * Parse MADT IO-APIC entries 1341 */ 1342 error = acpi_parse_madt_ioapic_entries(); 1343 if (!error) { 1344 acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC; 1345 acpi_irq_balance_set(NULL); 1346 acpi_ioapic = 1; 1347 1348 smp_found_config = 1; 1349 #ifdef CONFIG_X86_32 1350 setup_apic_routing(); 1351 #endif 1352 } 1353 } 1354 if (error == -EINVAL) { 1355 /* 1356 * Dell Precision Workstation 410, 610 come here. 1357 */ 1358 printk(KERN_ERR PREFIX 1359 "Invalid BIOS MADT, disabling ACPI\n"); 1360 disable_acpi(); 1361 } 1362 } 1363 #endif 1364 return; 1365 } 1366 1367 static int __init disable_acpi_irq(const struct dmi_system_id *d) 1368 { 1369 if (!acpi_force) { 1370 printk(KERN_NOTICE "%s detected: force use of acpi=noirq\n", 1371 d->ident); 1372 acpi_noirq_set(); 1373 } 1374 return 0; 1375 } 1376 1377 static int __init disable_acpi_pci(const struct dmi_system_id *d) 1378 { 1379 if (!acpi_force) { 1380 printk(KERN_NOTICE "%s detected: force use of pci=noacpi\n", 1381 d->ident); 1382 acpi_disable_pci(); 1383 } 1384 return 0; 1385 } 1386 1387 static int __init dmi_disable_acpi(const struct dmi_system_id *d) 1388 { 1389 if (!acpi_force) { 1390 printk(KERN_NOTICE "%s detected: acpi off\n", d->ident); 1391 disable_acpi(); 1392 } else { 1393 printk(KERN_NOTICE 1394 "Warning: DMI blacklist says broken, but acpi forced\n"); 1395 } 1396 return 0; 1397 } 1398 1399 /* 1400 * Limit ACPI to CPU enumeration for HT 1401 */ 1402 static int __init force_acpi_ht(const struct dmi_system_id *d) 1403 { 1404 if (!acpi_force) { 1405 printk(KERN_NOTICE "%s detected: force use of acpi=ht\n", 1406 d->ident); 1407 disable_acpi(); 1408 acpi_ht = 1; 1409 } else { 1410 printk(KERN_NOTICE 1411 "Warning: acpi=force overrules DMI blacklist: acpi=ht\n"); 1412 } 1413 return 0; 1414 } 1415 1416 /* 1417 * Force ignoring BIOS IRQ0 pin2 override 1418 */ 1419 static int __init dmi_ignore_irq0_timer_override(const struct dmi_system_id *d) 1420 { 1421 /* 1422 * The ati_ixp4x0_rev() early PCI quirk should have set 1423 * the acpi_skip_timer_override flag already: 1424 */ 1425 if (!acpi_skip_timer_override) { 1426 WARN(1, KERN_ERR "ati_ixp4x0 quirk not complete.\n"); 1427 pr_notice("%s detected: Ignoring BIOS IRQ0 pin2 override\n", 1428 d->ident); 1429 acpi_skip_timer_override = 1; 1430 } 1431 return 0; 1432 } 1433 1434 /* 1435 * If your system is blacklisted here, but you find that acpi=force 1436 * works for you, please contact acpi-devel@sourceforge.net 1437 */ 1438 static struct dmi_system_id __initdata acpi_dmi_table[] = { 1439 /* 1440 * Boxes that need ACPI disabled 1441 */ 1442 { 1443 .callback = dmi_disable_acpi, 1444 .ident = "IBM Thinkpad", 1445 .matches = { 1446 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), 1447 DMI_MATCH(DMI_BOARD_NAME, "2629H1G"), 1448 }, 1449 }, 1450 1451 /* 1452 * Boxes that need acpi=ht 1453 */ 1454 { 1455 .callback = force_acpi_ht, 1456 .ident = "FSC Primergy T850", 1457 .matches = { 1458 DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"), 1459 DMI_MATCH(DMI_PRODUCT_NAME, "PRIMERGY T850"), 1460 }, 1461 }, 1462 { 1463 .callback = force_acpi_ht, 1464 .ident = "HP VISUALIZE NT Workstation", 1465 .matches = { 1466 DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"), 1467 DMI_MATCH(DMI_PRODUCT_NAME, "HP VISUALIZE NT Workstation"), 1468 }, 1469 }, 1470 { 1471 .callback = force_acpi_ht, 1472 .ident = "Compaq Workstation W8000", 1473 .matches = { 1474 DMI_MATCH(DMI_SYS_VENDOR, "Compaq"), 1475 DMI_MATCH(DMI_PRODUCT_NAME, "Workstation W8000"), 1476 }, 1477 }, 1478 { 1479 .callback = force_acpi_ht, 1480 .ident = "ASUS P4B266", 1481 .matches = { 1482 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."), 1483 DMI_MATCH(DMI_BOARD_NAME, "P4B266"), 1484 }, 1485 }, 1486 { 1487 .callback = force_acpi_ht, 1488 .ident = "ASUS P2B-DS", 1489 .matches = { 1490 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."), 1491 DMI_MATCH(DMI_BOARD_NAME, "P2B-DS"), 1492 }, 1493 }, 1494 { 1495 .callback = force_acpi_ht, 1496 .ident = "ASUS CUR-DLS", 1497 .matches = { 1498 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."), 1499 DMI_MATCH(DMI_BOARD_NAME, "CUR-DLS"), 1500 }, 1501 }, 1502 { 1503 .callback = force_acpi_ht, 1504 .ident = "ABIT i440BX-W83977", 1505 .matches = { 1506 DMI_MATCH(DMI_BOARD_VENDOR, "ABIT <http://www.abit.com>"), 1507 DMI_MATCH(DMI_BOARD_NAME, "i440BX-W83977 (BP6)"), 1508 }, 1509 }, 1510 { 1511 .callback = force_acpi_ht, 1512 .ident = "IBM Bladecenter", 1513 .matches = { 1514 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), 1515 DMI_MATCH(DMI_BOARD_NAME, "IBM eServer BladeCenter HS20"), 1516 }, 1517 }, 1518 { 1519 .callback = force_acpi_ht, 1520 .ident = "IBM eServer xSeries 360", 1521 .matches = { 1522 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), 1523 DMI_MATCH(DMI_BOARD_NAME, "eServer xSeries 360"), 1524 }, 1525 }, 1526 { 1527 .callback = force_acpi_ht, 1528 .ident = "IBM eserver xSeries 330", 1529 .matches = { 1530 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), 1531 DMI_MATCH(DMI_BOARD_NAME, "eserver xSeries 330"), 1532 }, 1533 }, 1534 { 1535 .callback = force_acpi_ht, 1536 .ident = "IBM eserver xSeries 440", 1537 .matches = { 1538 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), 1539 DMI_MATCH(DMI_PRODUCT_NAME, "eserver xSeries 440"), 1540 }, 1541 }, 1542 1543 /* 1544 * Boxes that need ACPI PCI IRQ routing disabled 1545 */ 1546 { 1547 .callback = disable_acpi_irq, 1548 .ident = "ASUS A7V", 1549 .matches = { 1550 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC"), 1551 DMI_MATCH(DMI_BOARD_NAME, "<A7V>"), 1552 /* newer BIOS, Revision 1011, does work */ 1553 DMI_MATCH(DMI_BIOS_VERSION, 1554 "ASUS A7V ACPI BIOS Revision 1007"), 1555 }, 1556 }, 1557 { 1558 /* 1559 * Latest BIOS for IBM 600E (1.16) has bad pcinum 1560 * for LPC bridge, which is needed for the PCI 1561 * interrupt links to work. DSDT fix is in bug 5966. 1562 * 2645, 2646 model numbers are shared with 600/600E/600X 1563 */ 1564 .callback = disable_acpi_irq, 1565 .ident = "IBM Thinkpad 600 Series 2645", 1566 .matches = { 1567 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), 1568 DMI_MATCH(DMI_BOARD_NAME, "2645"), 1569 }, 1570 }, 1571 { 1572 .callback = disable_acpi_irq, 1573 .ident = "IBM Thinkpad 600 Series 2646", 1574 .matches = { 1575 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), 1576 DMI_MATCH(DMI_BOARD_NAME, "2646"), 1577 }, 1578 }, 1579 /* 1580 * Boxes that need ACPI PCI IRQ routing and PCI scan disabled 1581 */ 1582 { /* _BBN 0 bug */ 1583 .callback = disable_acpi_pci, 1584 .ident = "ASUS PR-DLS", 1585 .matches = { 1586 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."), 1587 DMI_MATCH(DMI_BOARD_NAME, "PR-DLS"), 1588 DMI_MATCH(DMI_BIOS_VERSION, 1589 "ASUS PR-DLS ACPI BIOS Revision 1010"), 1590 DMI_MATCH(DMI_BIOS_DATE, "03/21/2003") 1591 }, 1592 }, 1593 { 1594 .callback = disable_acpi_pci, 1595 .ident = "Acer TravelMate 36x Laptop", 1596 .matches = { 1597 DMI_MATCH(DMI_SYS_VENDOR, "Acer"), 1598 DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"), 1599 }, 1600 }, 1601 /* 1602 * HP laptops which use a DSDT reporting as HP/SB400/10000, 1603 * which includes some code which overrides all temperature 1604 * trip points to 16C if the INTIN2 input of the I/O APIC 1605 * is enabled. This input is incorrectly designated the 1606 * ISA IRQ 0 via an interrupt source override even though 1607 * it is wired to the output of the master 8259A and INTIN0 1608 * is not connected at all. Force ignoring BIOS IRQ0 pin2 1609 * override in that cases. 1610 */ 1611 { 1612 .callback = dmi_ignore_irq0_timer_override, 1613 .ident = "HP nx6115 laptop", 1614 .matches = { 1615 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 1616 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6115"), 1617 }, 1618 }, 1619 { 1620 .callback = dmi_ignore_irq0_timer_override, 1621 .ident = "HP NX6125 laptop", 1622 .matches = { 1623 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 1624 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6125"), 1625 }, 1626 }, 1627 { 1628 .callback = dmi_ignore_irq0_timer_override, 1629 .ident = "HP NX6325 laptop", 1630 .matches = { 1631 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 1632 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6325"), 1633 }, 1634 }, 1635 { 1636 .callback = dmi_ignore_irq0_timer_override, 1637 .ident = "HP 6715b laptop", 1638 .matches = { 1639 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 1640 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq 6715b"), 1641 }, 1642 }, 1643 {} 1644 }; 1645 1646 /* 1647 * acpi_boot_table_init() and acpi_boot_init() 1648 * called from setup_arch(), always. 1649 * 1. checksums all tables 1650 * 2. enumerates lapics 1651 * 3. enumerates io-apics 1652 * 1653 * acpi_table_init() is separate to allow reading SRAT without 1654 * other side effects. 1655 * 1656 * side effects of acpi_boot_init: 1657 * acpi_lapic = 1 if LAPIC found 1658 * acpi_ioapic = 1 if IOAPIC found 1659 * if (acpi_lapic && acpi_ioapic) smp_found_config = 1; 1660 * if acpi_blacklisted() acpi_disabled = 1; 1661 * acpi_irq_model=... 1662 * ... 1663 * 1664 * return value: (currently ignored) 1665 * 0: success 1666 * !0: failure 1667 */ 1668 1669 int __init acpi_boot_table_init(void) 1670 { 1671 int error; 1672 1673 dmi_check_system(acpi_dmi_table); 1674 1675 /* 1676 * If acpi_disabled, bail out 1677 * One exception: acpi=ht continues far enough to enumerate LAPICs 1678 */ 1679 if (acpi_disabled && !acpi_ht) 1680 return 1; 1681 1682 /* 1683 * Initialize the ACPI boot-time table parser. 1684 */ 1685 error = acpi_table_init(); 1686 if (error) { 1687 disable_acpi(); 1688 return error; 1689 } 1690 1691 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf); 1692 1693 /* 1694 * blacklist may disable ACPI entirely 1695 */ 1696 error = acpi_blacklisted(); 1697 if (error) { 1698 if (acpi_force) { 1699 printk(KERN_WARNING PREFIX "acpi=force override\n"); 1700 } else { 1701 printk(KERN_WARNING PREFIX "Disabling ACPI support\n"); 1702 disable_acpi(); 1703 return error; 1704 } 1705 } 1706 1707 return 0; 1708 } 1709 1710 int __init early_acpi_boot_init(void) 1711 { 1712 /* 1713 * If acpi_disabled, bail out 1714 * One exception: acpi=ht continues far enough to enumerate LAPICs 1715 */ 1716 if (acpi_disabled && !acpi_ht) 1717 return 1; 1718 1719 /* 1720 * Process the Multiple APIC Description Table (MADT), if present 1721 */ 1722 early_acpi_process_madt(); 1723 1724 return 0; 1725 } 1726 1727 int __init acpi_boot_init(void) 1728 { 1729 /* 1730 * If acpi_disabled, bail out 1731 * One exception: acpi=ht continues far enough to enumerate LAPICs 1732 */ 1733 if (acpi_disabled && !acpi_ht) 1734 return 1; 1735 1736 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf); 1737 1738 /* 1739 * set sci_int and PM timer address 1740 */ 1741 acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt); 1742 1743 /* 1744 * Process the Multiple APIC Description Table (MADT), if present 1745 */ 1746 acpi_process_madt(); 1747 1748 acpi_table_parse(ACPI_SIG_HPET, acpi_parse_hpet); 1749 1750 return 0; 1751 } 1752 1753 static int __init parse_acpi(char *arg) 1754 { 1755 if (!arg) 1756 return -EINVAL; 1757 1758 /* "acpi=off" disables both ACPI table parsing and interpreter */ 1759 if (strcmp(arg, "off") == 0) { 1760 disable_acpi(); 1761 } 1762 /* acpi=force to over-ride black-list */ 1763 else if (strcmp(arg, "force") == 0) { 1764 acpi_force = 1; 1765 acpi_ht = 1; 1766 acpi_disabled = 0; 1767 } 1768 /* acpi=strict disables out-of-spec workarounds */ 1769 else if (strcmp(arg, "strict") == 0) { 1770 acpi_strict = 1; 1771 } 1772 /* Limit ACPI just to boot-time to enable HT */ 1773 else if (strcmp(arg, "ht") == 0) { 1774 if (!acpi_force) 1775 disable_acpi(); 1776 acpi_ht = 1; 1777 } 1778 /* "acpi=noirq" disables ACPI interrupt routing */ 1779 else if (strcmp(arg, "noirq") == 0) { 1780 acpi_noirq_set(); 1781 } else { 1782 /* Core will printk when we return error. */ 1783 return -EINVAL; 1784 } 1785 return 0; 1786 } 1787 early_param("acpi", parse_acpi); 1788 1789 /* FIXME: Using pci= for an ACPI parameter is a travesty. */ 1790 static int __init parse_pci(char *arg) 1791 { 1792 if (arg && strcmp(arg, "noacpi") == 0) 1793 acpi_disable_pci(); 1794 return 0; 1795 } 1796 early_param("pci", parse_pci); 1797 1798 int __init acpi_mps_check(void) 1799 { 1800 #if defined(CONFIG_X86_LOCAL_APIC) && !defined(CONFIG_X86_MPPARSE) 1801 /* mptable code is not built-in*/ 1802 if (acpi_disabled || acpi_noirq) { 1803 printk(KERN_WARNING "MPS support code is not built-in.\n" 1804 "Using acpi=off or acpi=noirq or pci=noacpi " 1805 "may have problem\n"); 1806 return 1; 1807 } 1808 #endif 1809 return 0; 1810 } 1811 1812 #ifdef CONFIG_X86_IO_APIC 1813 static int __init parse_acpi_skip_timer_override(char *arg) 1814 { 1815 acpi_skip_timer_override = 1; 1816 return 0; 1817 } 1818 early_param("acpi_skip_timer_override", parse_acpi_skip_timer_override); 1819 1820 static int __init parse_acpi_use_timer_override(char *arg) 1821 { 1822 acpi_use_timer_override = 1; 1823 return 0; 1824 } 1825 early_param("acpi_use_timer_override", parse_acpi_use_timer_override); 1826 #endif /* CONFIG_X86_IO_APIC */ 1827 1828 static int __init setup_acpi_sci(char *s) 1829 { 1830 if (!s) 1831 return -EINVAL; 1832 if (!strcmp(s, "edge")) 1833 acpi_sci_flags = ACPI_MADT_TRIGGER_EDGE | 1834 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK); 1835 else if (!strcmp(s, "level")) 1836 acpi_sci_flags = ACPI_MADT_TRIGGER_LEVEL | 1837 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK); 1838 else if (!strcmp(s, "high")) 1839 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_HIGH | 1840 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK); 1841 else if (!strcmp(s, "low")) 1842 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_LOW | 1843 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK); 1844 else 1845 return -EINVAL; 1846 return 0; 1847 } 1848 early_param("acpi_sci", setup_acpi_sci); 1849 1850 int __acpi_acquire_global_lock(unsigned int *lock) 1851 { 1852 unsigned int old, new, val; 1853 do { 1854 old = *lock; 1855 new = (((old & ~0x3) + 2) + ((old >> 1) & 0x1)); 1856 val = cmpxchg(lock, old, new); 1857 } while (unlikely (val != old)); 1858 return (new < 3) ? -1 : 0; 1859 } 1860 1861 int __acpi_release_global_lock(unsigned int *lock) 1862 { 1863 unsigned int old, new, val; 1864 do { 1865 old = *lock; 1866 new = old & ~0x3; 1867 val = cmpxchg(lock, old, new); 1868 } while (unlikely (val != old)); 1869 return old & 0x1; 1870 } 1871