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