1 /* 2 * boot.c - Architecture-Specific Low-Level ACPI Boot Support 3 * 4 * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com> 5 * Copyright (C) 2001 Jun Nakajima <jun.nakajima@intel.com> 6 * 7 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 8 * 9 * This program is free software; you can redistribute it and/or modify 10 * it under the terms of the GNU General Public License as published by 11 * the Free Software Foundation; either version 2 of the License, or 12 * (at your option) any later version. 13 * 14 * This program is distributed in the hope that it will be useful, 15 * but WITHOUT ANY WARRANTY; without even the implied warranty of 16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 17 * GNU General Public License for more details. 18 * 19 * You should have received a copy of the GNU General Public License 20 * along with this program; if not, write to the Free Software 21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 22 * 23 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 24 */ 25 26 #include <linux/init.h> 27 #include <linux/acpi.h> 28 #include <linux/acpi_pmtmr.h> 29 #include <linux/efi.h> 30 #include <linux/cpumask.h> 31 #include <linux/module.h> 32 #include <linux/dmi.h> 33 #include <linux/irq.h> 34 #include <linux/bootmem.h> 35 #include <linux/ioport.h> 36 37 #include <asm/pgtable.h> 38 #include <asm/io_apic.h> 39 #include <asm/apic.h> 40 #include <asm/io.h> 41 #include <asm/mpspec.h> 42 43 static int __initdata acpi_force = 0; 44 45 #ifdef CONFIG_ACPI 46 int acpi_disabled = 0; 47 #else 48 int acpi_disabled = 1; 49 #endif 50 EXPORT_SYMBOL(acpi_disabled); 51 52 #ifdef CONFIG_X86_64 53 54 #include <asm/proto.h> 55 56 static inline int acpi_madt_oem_check(char *oem_id, char *oem_table_id) { return 0; } 57 58 59 #else /* X86 */ 60 61 #ifdef CONFIG_X86_LOCAL_APIC 62 #include <mach_apic.h> 63 #include <mach_mpparse.h> 64 #endif /* CONFIG_X86_LOCAL_APIC */ 65 66 #endif /* X86 */ 67 68 #define BAD_MADT_ENTRY(entry, end) ( \ 69 (!entry) || (unsigned long)entry + sizeof(*entry) > end || \ 70 ((struct acpi_subtable_header *)entry)->length < sizeof(*entry)) 71 72 #define PREFIX "ACPI: " 73 74 int acpi_noirq; /* skip ACPI IRQ initialization */ 75 int acpi_pci_disabled; /* skip ACPI PCI scan and IRQ initialization */ 76 EXPORT_SYMBOL(acpi_pci_disabled); 77 int acpi_ht __initdata = 1; /* enable HT */ 78 79 int acpi_lapic; 80 int acpi_ioapic; 81 int acpi_strict; 82 83 u8 acpi_sci_flags __initdata; 84 int acpi_sci_override_gsi __initdata; 85 int acpi_skip_timer_override __initdata; 86 int acpi_use_timer_override __initdata; 87 88 #ifdef CONFIG_X86_LOCAL_APIC 89 static u64 acpi_lapic_addr __initdata = APIC_DEFAULT_PHYS_BASE; 90 #endif 91 92 #ifndef __HAVE_ARCH_CMPXCHG 93 #warning ACPI uses CMPXCHG, i486 and later hardware 94 #endif 95 96 /* -------------------------------------------------------------------------- 97 Boot-time Configuration 98 -------------------------------------------------------------------------- */ 99 100 /* 101 * The default interrupt routing model is PIC (8259). This gets 102 * overridden if IOAPICs are enumerated (below). 103 */ 104 enum acpi_irq_model_id acpi_irq_model = ACPI_IRQ_MODEL_PIC; 105 106 #ifdef CONFIG_X86_64 107 108 /* rely on all ACPI tables being in the direct mapping */ 109 char *__init __acpi_map_table(unsigned long phys_addr, unsigned long size) 110 { 111 if (!phys_addr || !size) 112 return NULL; 113 114 if (phys_addr+size <= (end_pfn_map << PAGE_SHIFT) + PAGE_SIZE) 115 return __va(phys_addr); 116 117 return NULL; 118 } 119 120 #else 121 122 /* 123 * Temporarily use the virtual area starting from FIX_IO_APIC_BASE_END, 124 * to map the target physical address. The problem is that set_fixmap() 125 * provides a single page, and it is possible that the page is not 126 * sufficient. 127 * By using this area, we can map up to MAX_IO_APICS pages temporarily, 128 * i.e. until the next __va_range() call. 129 * 130 * Important Safety Note: The fixed I/O APIC page numbers are *subtracted* 131 * from the fixed base. That's why we start at FIX_IO_APIC_BASE_END and 132 * count idx down while incrementing the phys address. 133 */ 134 char *__init __acpi_map_table(unsigned long phys, unsigned long size) 135 { 136 unsigned long base, offset, mapped_size; 137 int idx; 138 139 if (phys + size < 8 * 1024 * 1024) 140 return __va(phys); 141 142 offset = phys & (PAGE_SIZE - 1); 143 mapped_size = PAGE_SIZE - offset; 144 set_fixmap(FIX_ACPI_END, phys); 145 base = fix_to_virt(FIX_ACPI_END); 146 147 /* 148 * Most cases can be covered by the below. 149 */ 150 idx = FIX_ACPI_END; 151 while (mapped_size < size) { 152 if (--idx < FIX_ACPI_BEGIN) 153 return NULL; /* cannot handle this */ 154 phys += PAGE_SIZE; 155 set_fixmap(idx, phys); 156 mapped_size += PAGE_SIZE; 157 } 158 159 return ((unsigned char *)base + offset); 160 } 161 #endif 162 163 #ifdef CONFIG_PCI_MMCONFIG 164 /* The physical address of the MMCONFIG aperture. Set from ACPI tables. */ 165 struct acpi_mcfg_allocation *pci_mmcfg_config; 166 int pci_mmcfg_config_num; 167 168 int __init acpi_parse_mcfg(struct acpi_table_header *header) 169 { 170 struct acpi_table_mcfg *mcfg; 171 unsigned long i; 172 int config_size; 173 174 if (!header) 175 return -EINVAL; 176 177 mcfg = (struct acpi_table_mcfg *)header; 178 179 /* how many config structures do we have */ 180 pci_mmcfg_config_num = 0; 181 i = header->length - sizeof(struct acpi_table_mcfg); 182 while (i >= sizeof(struct acpi_mcfg_allocation)) { 183 ++pci_mmcfg_config_num; 184 i -= sizeof(struct acpi_mcfg_allocation); 185 }; 186 if (pci_mmcfg_config_num == 0) { 187 printk(KERN_ERR PREFIX "MMCONFIG has no entries\n"); 188 return -ENODEV; 189 } 190 191 config_size = pci_mmcfg_config_num * sizeof(*pci_mmcfg_config); 192 pci_mmcfg_config = kmalloc(config_size, GFP_KERNEL); 193 if (!pci_mmcfg_config) { 194 printk(KERN_WARNING PREFIX 195 "No memory for MCFG config tables\n"); 196 return -ENOMEM; 197 } 198 199 memcpy(pci_mmcfg_config, &mcfg[1], config_size); 200 for (i = 0; i < pci_mmcfg_config_num; ++i) { 201 if (pci_mmcfg_config[i].address > 0xFFFFFFFF) { 202 printk(KERN_ERR PREFIX 203 "MMCONFIG not in low 4GB of memory\n"); 204 kfree(pci_mmcfg_config); 205 pci_mmcfg_config_num = 0; 206 return -ENODEV; 207 } 208 } 209 210 return 0; 211 } 212 #endif /* CONFIG_PCI_MMCONFIG */ 213 214 #ifdef CONFIG_X86_LOCAL_APIC 215 static int __init acpi_parse_madt(struct acpi_table_header *table) 216 { 217 struct acpi_table_madt *madt = NULL; 218 219 if (!cpu_has_apic) 220 return -EINVAL; 221 222 madt = (struct acpi_table_madt *)table; 223 if (!madt) { 224 printk(KERN_WARNING PREFIX "Unable to map MADT\n"); 225 return -ENODEV; 226 } 227 228 if (madt->address) { 229 acpi_lapic_addr = (u64) madt->address; 230 231 printk(KERN_DEBUG PREFIX "Local APIC address 0x%08x\n", 232 madt->address); 233 } 234 235 acpi_madt_oem_check(madt->header.oem_id, madt->header.oem_table_id); 236 237 return 0; 238 } 239 240 static int __init 241 acpi_parse_lapic(struct acpi_subtable_header * header, const unsigned long end) 242 { 243 struct acpi_madt_local_apic *processor = NULL; 244 245 processor = (struct acpi_madt_local_apic *)header; 246 247 if (BAD_MADT_ENTRY(processor, end)) 248 return -EINVAL; 249 250 acpi_table_print_madt_entry(header); 251 252 /* 253 * We need to register disabled CPU as well to permit 254 * counting disabled CPUs. This allows us to size 255 * cpus_possible_map more accurately, to permit 256 * to not preallocating memory for all NR_CPUS 257 * when we use CPU hotplug. 258 */ 259 mp_register_lapic(processor->id, /* APIC ID */ 260 processor->lapic_flags & ACPI_MADT_ENABLED); /* Enabled? */ 261 262 return 0; 263 } 264 265 static int __init 266 acpi_parse_lapic_addr_ovr(struct acpi_subtable_header * header, 267 const unsigned long end) 268 { 269 struct acpi_madt_local_apic_override *lapic_addr_ovr = NULL; 270 271 lapic_addr_ovr = (struct acpi_madt_local_apic_override *)header; 272 273 if (BAD_MADT_ENTRY(lapic_addr_ovr, end)) 274 return -EINVAL; 275 276 acpi_lapic_addr = lapic_addr_ovr->address; 277 278 return 0; 279 } 280 281 static int __init 282 acpi_parse_lapic_nmi(struct acpi_subtable_header * header, const unsigned long end) 283 { 284 struct acpi_madt_local_apic_nmi *lapic_nmi = NULL; 285 286 lapic_nmi = (struct acpi_madt_local_apic_nmi *)header; 287 288 if (BAD_MADT_ENTRY(lapic_nmi, end)) 289 return -EINVAL; 290 291 acpi_table_print_madt_entry(header); 292 293 if (lapic_nmi->lint != 1) 294 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n"); 295 296 return 0; 297 } 298 299 #endif /*CONFIG_X86_LOCAL_APIC */ 300 301 #ifdef CONFIG_X86_IO_APIC 302 303 static int __init 304 acpi_parse_ioapic(struct acpi_subtable_header * header, const unsigned long end) 305 { 306 struct acpi_madt_io_apic *ioapic = NULL; 307 308 ioapic = (struct acpi_madt_io_apic *)header; 309 310 if (BAD_MADT_ENTRY(ioapic, end)) 311 return -EINVAL; 312 313 acpi_table_print_madt_entry(header); 314 315 mp_register_ioapic(ioapic->id, 316 ioapic->address, ioapic->global_irq_base); 317 318 return 0; 319 } 320 321 /* 322 * Parse Interrupt Source Override for the ACPI SCI 323 */ 324 static void __init acpi_sci_ioapic_setup(u32 gsi, u16 polarity, u16 trigger) 325 { 326 if (trigger == 0) /* compatible SCI trigger is level */ 327 trigger = 3; 328 329 if (polarity == 0) /* compatible SCI polarity is low */ 330 polarity = 3; 331 332 /* Command-line over-ride via acpi_sci= */ 333 if (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) 334 trigger = (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2; 335 336 if (acpi_sci_flags & ACPI_MADT_POLARITY_MASK) 337 polarity = acpi_sci_flags & ACPI_MADT_POLARITY_MASK; 338 339 /* 340 * mp_config_acpi_legacy_irqs() already setup IRQs < 16 341 * If GSI is < 16, this will update its flags, 342 * else it will create a new mp_irqs[] entry. 343 */ 344 mp_override_legacy_irq(gsi, polarity, trigger, gsi); 345 346 /* 347 * stash over-ride to indicate we've been here 348 * and for later update of acpi_gbl_FADT 349 */ 350 acpi_sci_override_gsi = gsi; 351 return; 352 } 353 354 static int __init 355 acpi_parse_int_src_ovr(struct acpi_subtable_header * header, 356 const unsigned long end) 357 { 358 struct acpi_madt_interrupt_override *intsrc = NULL; 359 360 intsrc = (struct acpi_madt_interrupt_override *)header; 361 362 if (BAD_MADT_ENTRY(intsrc, end)) 363 return -EINVAL; 364 365 acpi_table_print_madt_entry(header); 366 367 if (intsrc->source_irq == acpi_gbl_FADT.sci_interrupt) { 368 acpi_sci_ioapic_setup(intsrc->global_irq, 369 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK, 370 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2); 371 return 0; 372 } 373 374 if (acpi_skip_timer_override && 375 intsrc->source_irq == 0 && intsrc->global_irq == 2) { 376 printk(PREFIX "BIOS IRQ0 pin2 override ignored.\n"); 377 return 0; 378 } 379 380 mp_override_legacy_irq(intsrc->source_irq, 381 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK, 382 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2, 383 intsrc->global_irq); 384 385 return 0; 386 } 387 388 static int __init 389 acpi_parse_nmi_src(struct acpi_subtable_header * header, const unsigned long end) 390 { 391 struct acpi_madt_nmi_source *nmi_src = NULL; 392 393 nmi_src = (struct acpi_madt_nmi_source *)header; 394 395 if (BAD_MADT_ENTRY(nmi_src, end)) 396 return -EINVAL; 397 398 acpi_table_print_madt_entry(header); 399 400 /* TBD: Support nimsrc entries? */ 401 402 return 0; 403 } 404 405 #endif /* CONFIG_X86_IO_APIC */ 406 407 /* 408 * acpi_pic_sci_set_trigger() 409 * 410 * use ELCR to set PIC-mode trigger type for SCI 411 * 412 * If a PIC-mode SCI is not recognized or gives spurious IRQ7's 413 * it may require Edge Trigger -- use "acpi_sci=edge" 414 * 415 * Port 0x4d0-4d1 are ECLR1 and ECLR2, the Edge/Level Control Registers 416 * for the 8259 PIC. bit[n] = 1 means irq[n] is Level, otherwise Edge. 417 * ECLR1 is IRQs 0-7 (IRQ 0, 1, 2 must be 0) 418 * ECLR2 is IRQs 8-15 (IRQ 8, 13 must be 0) 419 */ 420 421 void __init acpi_pic_sci_set_trigger(unsigned int irq, u16 trigger) 422 { 423 unsigned int mask = 1 << irq; 424 unsigned int old, new; 425 426 /* Real old ELCR mask */ 427 old = inb(0x4d0) | (inb(0x4d1) << 8); 428 429 /* 430 * If we use ACPI to set PCI IRQs, then we should clear ELCR 431 * since we will set it correctly as we enable the PCI irq 432 * routing. 433 */ 434 new = acpi_noirq ? old : 0; 435 436 /* 437 * Update SCI information in the ELCR, it isn't in the PCI 438 * routing tables.. 439 */ 440 switch (trigger) { 441 case 1: /* Edge - clear */ 442 new &= ~mask; 443 break; 444 case 3: /* Level - set */ 445 new |= mask; 446 break; 447 } 448 449 if (old == new) 450 return; 451 452 printk(PREFIX "setting ELCR to %04x (from %04x)\n", new, old); 453 outb(new, 0x4d0); 454 outb(new >> 8, 0x4d1); 455 } 456 457 int acpi_gsi_to_irq(u32 gsi, unsigned int *irq) 458 { 459 *irq = gsi; 460 return 0; 461 } 462 463 /* 464 * success: return IRQ number (>=0) 465 * failure: return < 0 466 */ 467 int acpi_register_gsi(u32 gsi, int triggering, int polarity) 468 { 469 unsigned int irq; 470 unsigned int plat_gsi = gsi; 471 472 #ifdef CONFIG_PCI 473 /* 474 * Make sure all (legacy) PCI IRQs are set as level-triggered. 475 */ 476 if (acpi_irq_model == ACPI_IRQ_MODEL_PIC) { 477 extern void eisa_set_level_irq(unsigned int irq); 478 479 if (triggering == ACPI_LEVEL_SENSITIVE) 480 eisa_set_level_irq(gsi); 481 } 482 #endif 483 484 #ifdef CONFIG_X86_IO_APIC 485 if (acpi_irq_model == ACPI_IRQ_MODEL_IOAPIC) { 486 plat_gsi = mp_register_gsi(gsi, triggering, polarity); 487 } 488 #endif 489 acpi_gsi_to_irq(plat_gsi, &irq); 490 return irq; 491 } 492 493 /* 494 * ACPI based hotplug support for CPU 495 */ 496 #ifdef CONFIG_ACPI_HOTPLUG_CPU 497 498 static int __cpuinit _acpi_map_lsapic(acpi_handle handle, int *pcpu) 499 { 500 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; 501 union acpi_object *obj; 502 struct acpi_madt_local_apic *lapic; 503 cpumask_t tmp_map, new_map; 504 u8 physid; 505 int cpu; 506 507 if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer))) 508 return -EINVAL; 509 510 if (!buffer.length || !buffer.pointer) 511 return -EINVAL; 512 513 obj = buffer.pointer; 514 if (obj->type != ACPI_TYPE_BUFFER || 515 obj->buffer.length < sizeof(*lapic)) { 516 kfree(buffer.pointer); 517 return -EINVAL; 518 } 519 520 lapic = (struct acpi_madt_local_apic *)obj->buffer.pointer; 521 522 if (lapic->header.type != ACPI_MADT_TYPE_LOCAL_APIC || 523 !(lapic->lapic_flags & ACPI_MADT_ENABLED)) { 524 kfree(buffer.pointer); 525 return -EINVAL; 526 } 527 528 physid = lapic->id; 529 530 kfree(buffer.pointer); 531 buffer.length = ACPI_ALLOCATE_BUFFER; 532 buffer.pointer = NULL; 533 534 tmp_map = cpu_present_map; 535 mp_register_lapic(physid, lapic->lapic_flags & ACPI_MADT_ENABLED); 536 537 /* 538 * If mp_register_lapic successfully generates a new logical cpu 539 * number, then the following will get us exactly what was mapped 540 */ 541 cpus_andnot(new_map, cpu_present_map, tmp_map); 542 if (cpus_empty(new_map)) { 543 printk ("Unable to map lapic to logical cpu number\n"); 544 return -EINVAL; 545 } 546 547 cpu = first_cpu(new_map); 548 549 *pcpu = cpu; 550 return 0; 551 } 552 553 /* wrapper to silence section mismatch warning */ 554 int __ref acpi_map_lsapic(acpi_handle handle, int *pcpu) 555 { 556 return _acpi_map_lsapic(handle, pcpu); 557 } 558 EXPORT_SYMBOL(acpi_map_lsapic); 559 560 int acpi_unmap_lsapic(int cpu) 561 { 562 per_cpu(x86_cpu_to_apicid, cpu) = -1; 563 cpu_clear(cpu, cpu_present_map); 564 num_processors--; 565 566 return (0); 567 } 568 569 EXPORT_SYMBOL(acpi_unmap_lsapic); 570 #endif /* CONFIG_ACPI_HOTPLUG_CPU */ 571 572 int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base) 573 { 574 /* TBD */ 575 return -EINVAL; 576 } 577 578 EXPORT_SYMBOL(acpi_register_ioapic); 579 580 int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base) 581 { 582 /* TBD */ 583 return -EINVAL; 584 } 585 586 EXPORT_SYMBOL(acpi_unregister_ioapic); 587 588 static int __init acpi_parse_sbf(struct acpi_table_header *table) 589 { 590 struct acpi_table_boot *sb; 591 592 sb = (struct acpi_table_boot *)table; 593 if (!sb) { 594 printk(KERN_WARNING PREFIX "Unable to map SBF\n"); 595 return -ENODEV; 596 } 597 598 sbf_port = sb->cmos_index; /* Save CMOS port */ 599 600 return 0; 601 } 602 603 #ifdef CONFIG_HPET_TIMER 604 #include <asm/hpet.h> 605 606 static struct __initdata resource *hpet_res; 607 608 static int __init acpi_parse_hpet(struct acpi_table_header *table) 609 { 610 struct acpi_table_hpet *hpet_tbl; 611 612 hpet_tbl = (struct acpi_table_hpet *)table; 613 if (!hpet_tbl) { 614 printk(KERN_WARNING PREFIX "Unable to map HPET\n"); 615 return -ENODEV; 616 } 617 618 if (hpet_tbl->address.space_id != ACPI_SPACE_MEM) { 619 printk(KERN_WARNING PREFIX "HPET timers must be located in " 620 "memory.\n"); 621 return -1; 622 } 623 624 hpet_address = hpet_tbl->address.address; 625 626 /* 627 * Some broken BIOSes advertise HPET at 0x0. We really do not 628 * want to allocate a resource there. 629 */ 630 if (!hpet_address) { 631 printk(KERN_WARNING PREFIX 632 "HPET id: %#x base: %#lx is invalid\n", 633 hpet_tbl->id, hpet_address); 634 return 0; 635 } 636 #ifdef CONFIG_X86_64 637 /* 638 * Some even more broken BIOSes advertise HPET at 639 * 0xfed0000000000000 instead of 0xfed00000. Fix it up and add 640 * some noise: 641 */ 642 if (hpet_address == 0xfed0000000000000UL) { 643 if (!hpet_force_user) { 644 printk(KERN_WARNING PREFIX "HPET id: %#x " 645 "base: 0xfed0000000000000 is bogus\n " 646 "try hpet=force on the kernel command line to " 647 "fix it up to 0xfed00000.\n", hpet_tbl->id); 648 hpet_address = 0; 649 return 0; 650 } 651 printk(KERN_WARNING PREFIX 652 "HPET id: %#x base: 0xfed0000000000000 fixed up " 653 "to 0xfed00000.\n", hpet_tbl->id); 654 hpet_address >>= 32; 655 } 656 #endif 657 printk(KERN_INFO PREFIX "HPET id: %#x base: %#lx\n", 658 hpet_tbl->id, hpet_address); 659 660 /* 661 * Allocate and initialize the HPET firmware resource for adding into 662 * the resource tree during the lateinit timeframe. 663 */ 664 #define HPET_RESOURCE_NAME_SIZE 9 665 hpet_res = alloc_bootmem(sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE); 666 667 if (!hpet_res) 668 return 0; 669 670 memset(hpet_res, 0, sizeof(*hpet_res)); 671 hpet_res->name = (void *)&hpet_res[1]; 672 hpet_res->flags = IORESOURCE_MEM; 673 snprintf((char *)hpet_res->name, HPET_RESOURCE_NAME_SIZE, "HPET %u", 674 hpet_tbl->sequence); 675 676 hpet_res->start = hpet_address; 677 hpet_res->end = hpet_address + (1 * 1024) - 1; 678 679 return 0; 680 } 681 682 /* 683 * hpet_insert_resource inserts the HPET resources used into the resource 684 * tree. 685 */ 686 static __init int hpet_insert_resource(void) 687 { 688 if (!hpet_res) 689 return 1; 690 691 return insert_resource(&iomem_resource, hpet_res); 692 } 693 694 late_initcall(hpet_insert_resource); 695 696 #else 697 #define acpi_parse_hpet NULL 698 #endif 699 700 static int __init acpi_parse_fadt(struct acpi_table_header *table) 701 { 702 703 #ifdef CONFIG_X86_PM_TIMER 704 /* detect the location of the ACPI PM Timer */ 705 if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID) { 706 /* FADT rev. 2 */ 707 if (acpi_gbl_FADT.xpm_timer_block.space_id != 708 ACPI_ADR_SPACE_SYSTEM_IO) 709 return 0; 710 711 pmtmr_ioport = acpi_gbl_FADT.xpm_timer_block.address; 712 /* 713 * "X" fields are optional extensions to the original V1.0 714 * fields, so we must selectively expand V1.0 fields if the 715 * corresponding X field is zero. 716 */ 717 if (!pmtmr_ioport) 718 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block; 719 } else { 720 /* FADT rev. 1 */ 721 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block; 722 } 723 if (pmtmr_ioport) 724 printk(KERN_INFO PREFIX "PM-Timer IO Port: %#x\n", 725 pmtmr_ioport); 726 #endif 727 return 0; 728 } 729 730 #ifdef CONFIG_X86_LOCAL_APIC 731 /* 732 * Parse LAPIC entries in MADT 733 * returns 0 on success, < 0 on error 734 */ 735 static int __init acpi_parse_madt_lapic_entries(void) 736 { 737 int count; 738 739 if (!cpu_has_apic) 740 return -ENODEV; 741 742 /* 743 * Note that the LAPIC address is obtained from the MADT (32-bit value) 744 * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value). 745 */ 746 747 count = 748 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE, 749 acpi_parse_lapic_addr_ovr, 0); 750 if (count < 0) { 751 printk(KERN_ERR PREFIX 752 "Error parsing LAPIC address override entry\n"); 753 return count; 754 } 755 756 mp_register_lapic_address(acpi_lapic_addr); 757 758 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC, acpi_parse_lapic, 759 MAX_APICS); 760 if (!count) { 761 printk(KERN_ERR PREFIX "No LAPIC entries present\n"); 762 /* TBD: Cleanup to allow fallback to MPS */ 763 return -ENODEV; 764 } else if (count < 0) { 765 printk(KERN_ERR PREFIX "Error parsing LAPIC entry\n"); 766 /* TBD: Cleanup to allow fallback to MPS */ 767 return count; 768 } 769 770 count = 771 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI, acpi_parse_lapic_nmi, 0); 772 if (count < 0) { 773 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n"); 774 /* TBD: Cleanup to allow fallback to MPS */ 775 return count; 776 } 777 return 0; 778 } 779 #endif /* CONFIG_X86_LOCAL_APIC */ 780 781 #ifdef CONFIG_X86_IO_APIC 782 /* 783 * Parse IOAPIC related entries in MADT 784 * returns 0 on success, < 0 on error 785 */ 786 static int __init acpi_parse_madt_ioapic_entries(void) 787 { 788 int count; 789 790 /* 791 * ACPI interpreter is required to complete interrupt setup, 792 * so if it is off, don't enumerate the io-apics with ACPI. 793 * If MPS is present, it will handle them, 794 * otherwise the system will stay in PIC mode 795 */ 796 if (acpi_disabled || acpi_noirq) { 797 return -ENODEV; 798 } 799 800 if (!cpu_has_apic) 801 return -ENODEV; 802 803 /* 804 * if "noapic" boot option, don't look for IO-APICs 805 */ 806 if (skip_ioapic_setup) { 807 printk(KERN_INFO PREFIX "Skipping IOAPIC probe " 808 "due to 'noapic' option.\n"); 809 return -ENODEV; 810 } 811 812 count = 813 acpi_table_parse_madt(ACPI_MADT_TYPE_IO_APIC, acpi_parse_ioapic, 814 MAX_IO_APICS); 815 if (!count) { 816 printk(KERN_ERR PREFIX "No IOAPIC entries present\n"); 817 return -ENODEV; 818 } else if (count < 0) { 819 printk(KERN_ERR PREFIX "Error parsing IOAPIC entry\n"); 820 return count; 821 } 822 823 count = 824 acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE, acpi_parse_int_src_ovr, 825 NR_IRQ_VECTORS); 826 if (count < 0) { 827 printk(KERN_ERR PREFIX 828 "Error parsing interrupt source overrides entry\n"); 829 /* TBD: Cleanup to allow fallback to MPS */ 830 return count; 831 } 832 833 /* 834 * If BIOS did not supply an INT_SRC_OVR for the SCI 835 * pretend we got one so we can set the SCI flags. 836 */ 837 if (!acpi_sci_override_gsi) 838 acpi_sci_ioapic_setup(acpi_gbl_FADT.sci_interrupt, 0, 0); 839 840 /* Fill in identity legacy mapings where no override */ 841 mp_config_acpi_legacy_irqs(); 842 843 count = 844 acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE, acpi_parse_nmi_src, 845 NR_IRQ_VECTORS); 846 if (count < 0) { 847 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n"); 848 /* TBD: Cleanup to allow fallback to MPS */ 849 return count; 850 } 851 852 return 0; 853 } 854 #else 855 static inline int acpi_parse_madt_ioapic_entries(void) 856 { 857 return -1; 858 } 859 #endif /* !CONFIG_X86_IO_APIC */ 860 861 static void __init acpi_process_madt(void) 862 { 863 #ifdef CONFIG_X86_LOCAL_APIC 864 int error; 865 866 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) { 867 868 /* 869 * Parse MADT LAPIC entries 870 */ 871 error = acpi_parse_madt_lapic_entries(); 872 if (!error) { 873 acpi_lapic = 1; 874 875 #ifdef CONFIG_X86_GENERICARCH 876 generic_bigsmp_probe(); 877 #endif 878 /* 879 * Parse MADT IO-APIC entries 880 */ 881 error = acpi_parse_madt_ioapic_entries(); 882 if (!error) { 883 acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC; 884 acpi_irq_balance_set(NULL); 885 acpi_ioapic = 1; 886 887 smp_found_config = 1; 888 setup_apic_routing(); 889 } 890 } 891 if (error == -EINVAL) { 892 /* 893 * Dell Precision Workstation 410, 610 come here. 894 */ 895 printk(KERN_ERR PREFIX 896 "Invalid BIOS MADT, disabling ACPI\n"); 897 disable_acpi(); 898 } 899 } 900 #endif 901 return; 902 } 903 904 #ifdef __i386__ 905 906 static int __init disable_acpi_irq(const struct dmi_system_id *d) 907 { 908 if (!acpi_force) { 909 printk(KERN_NOTICE "%s detected: force use of acpi=noirq\n", 910 d->ident); 911 acpi_noirq_set(); 912 } 913 return 0; 914 } 915 916 static int __init disable_acpi_pci(const struct dmi_system_id *d) 917 { 918 if (!acpi_force) { 919 printk(KERN_NOTICE "%s detected: force use of pci=noacpi\n", 920 d->ident); 921 acpi_disable_pci(); 922 } 923 return 0; 924 } 925 926 static int __init dmi_disable_acpi(const struct dmi_system_id *d) 927 { 928 if (!acpi_force) { 929 printk(KERN_NOTICE "%s detected: acpi off\n", d->ident); 930 disable_acpi(); 931 } else { 932 printk(KERN_NOTICE 933 "Warning: DMI blacklist says broken, but acpi forced\n"); 934 } 935 return 0; 936 } 937 938 /* 939 * Limit ACPI to CPU enumeration for HT 940 */ 941 static int __init force_acpi_ht(const struct dmi_system_id *d) 942 { 943 if (!acpi_force) { 944 printk(KERN_NOTICE "%s detected: force use of acpi=ht\n", 945 d->ident); 946 disable_acpi(); 947 acpi_ht = 1; 948 } else { 949 printk(KERN_NOTICE 950 "Warning: acpi=force overrules DMI blacklist: acpi=ht\n"); 951 } 952 return 0; 953 } 954 955 /* 956 * If your system is blacklisted here, but you find that acpi=force 957 * works for you, please contact acpi-devel@sourceforge.net 958 */ 959 static struct dmi_system_id __initdata acpi_dmi_table[] = { 960 /* 961 * Boxes that need ACPI disabled 962 */ 963 { 964 .callback = dmi_disable_acpi, 965 .ident = "IBM Thinkpad", 966 .matches = { 967 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), 968 DMI_MATCH(DMI_BOARD_NAME, "2629H1G"), 969 }, 970 }, 971 972 /* 973 * Boxes that need acpi=ht 974 */ 975 { 976 .callback = force_acpi_ht, 977 .ident = "FSC Primergy T850", 978 .matches = { 979 DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"), 980 DMI_MATCH(DMI_PRODUCT_NAME, "PRIMERGY T850"), 981 }, 982 }, 983 { 984 .callback = force_acpi_ht, 985 .ident = "HP VISUALIZE NT Workstation", 986 .matches = { 987 DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"), 988 DMI_MATCH(DMI_PRODUCT_NAME, "HP VISUALIZE NT Workstation"), 989 }, 990 }, 991 { 992 .callback = force_acpi_ht, 993 .ident = "Compaq Workstation W8000", 994 .matches = { 995 DMI_MATCH(DMI_SYS_VENDOR, "Compaq"), 996 DMI_MATCH(DMI_PRODUCT_NAME, "Workstation W8000"), 997 }, 998 }, 999 { 1000 .callback = force_acpi_ht, 1001 .ident = "ASUS P4B266", 1002 .matches = { 1003 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."), 1004 DMI_MATCH(DMI_BOARD_NAME, "P4B266"), 1005 }, 1006 }, 1007 { 1008 .callback = force_acpi_ht, 1009 .ident = "ASUS P2B-DS", 1010 .matches = { 1011 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."), 1012 DMI_MATCH(DMI_BOARD_NAME, "P2B-DS"), 1013 }, 1014 }, 1015 { 1016 .callback = force_acpi_ht, 1017 .ident = "ASUS CUR-DLS", 1018 .matches = { 1019 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."), 1020 DMI_MATCH(DMI_BOARD_NAME, "CUR-DLS"), 1021 }, 1022 }, 1023 { 1024 .callback = force_acpi_ht, 1025 .ident = "ABIT i440BX-W83977", 1026 .matches = { 1027 DMI_MATCH(DMI_BOARD_VENDOR, "ABIT <http://www.abit.com>"), 1028 DMI_MATCH(DMI_BOARD_NAME, "i440BX-W83977 (BP6)"), 1029 }, 1030 }, 1031 { 1032 .callback = force_acpi_ht, 1033 .ident = "IBM Bladecenter", 1034 .matches = { 1035 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), 1036 DMI_MATCH(DMI_BOARD_NAME, "IBM eServer BladeCenter HS20"), 1037 }, 1038 }, 1039 { 1040 .callback = force_acpi_ht, 1041 .ident = "IBM eServer xSeries 360", 1042 .matches = { 1043 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), 1044 DMI_MATCH(DMI_BOARD_NAME, "eServer xSeries 360"), 1045 }, 1046 }, 1047 { 1048 .callback = force_acpi_ht, 1049 .ident = "IBM eserver xSeries 330", 1050 .matches = { 1051 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), 1052 DMI_MATCH(DMI_BOARD_NAME, "eserver xSeries 330"), 1053 }, 1054 }, 1055 { 1056 .callback = force_acpi_ht, 1057 .ident = "IBM eserver xSeries 440", 1058 .matches = { 1059 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), 1060 DMI_MATCH(DMI_PRODUCT_NAME, "eserver xSeries 440"), 1061 }, 1062 }, 1063 1064 /* 1065 * Boxes that need ACPI PCI IRQ routing disabled 1066 */ 1067 { 1068 .callback = disable_acpi_irq, 1069 .ident = "ASUS A7V", 1070 .matches = { 1071 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC"), 1072 DMI_MATCH(DMI_BOARD_NAME, "<A7V>"), 1073 /* newer BIOS, Revision 1011, does work */ 1074 DMI_MATCH(DMI_BIOS_VERSION, 1075 "ASUS A7V ACPI BIOS Revision 1007"), 1076 }, 1077 }, 1078 { 1079 /* 1080 * Latest BIOS for IBM 600E (1.16) has bad pcinum 1081 * for LPC bridge, which is needed for the PCI 1082 * interrupt links to work. DSDT fix is in bug 5966. 1083 * 2645, 2646 model numbers are shared with 600/600E/600X 1084 */ 1085 .callback = disable_acpi_irq, 1086 .ident = "IBM Thinkpad 600 Series 2645", 1087 .matches = { 1088 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), 1089 DMI_MATCH(DMI_BOARD_NAME, "2645"), 1090 }, 1091 }, 1092 { 1093 .callback = disable_acpi_irq, 1094 .ident = "IBM Thinkpad 600 Series 2646", 1095 .matches = { 1096 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), 1097 DMI_MATCH(DMI_BOARD_NAME, "2646"), 1098 }, 1099 }, 1100 /* 1101 * Boxes that need ACPI PCI IRQ routing and PCI scan disabled 1102 */ 1103 { /* _BBN 0 bug */ 1104 .callback = disable_acpi_pci, 1105 .ident = "ASUS PR-DLS", 1106 .matches = { 1107 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."), 1108 DMI_MATCH(DMI_BOARD_NAME, "PR-DLS"), 1109 DMI_MATCH(DMI_BIOS_VERSION, 1110 "ASUS PR-DLS ACPI BIOS Revision 1010"), 1111 DMI_MATCH(DMI_BIOS_DATE, "03/21/2003") 1112 }, 1113 }, 1114 { 1115 .callback = disable_acpi_pci, 1116 .ident = "Acer TravelMate 36x Laptop", 1117 .matches = { 1118 DMI_MATCH(DMI_SYS_VENDOR, "Acer"), 1119 DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"), 1120 }, 1121 }, 1122 {} 1123 }; 1124 1125 #endif /* __i386__ */ 1126 1127 /* 1128 * acpi_boot_table_init() and acpi_boot_init() 1129 * called from setup_arch(), always. 1130 * 1. checksums all tables 1131 * 2. enumerates lapics 1132 * 3. enumerates io-apics 1133 * 1134 * acpi_table_init() is separate to allow reading SRAT without 1135 * other side effects. 1136 * 1137 * side effects of acpi_boot_init: 1138 * acpi_lapic = 1 if LAPIC found 1139 * acpi_ioapic = 1 if IOAPIC found 1140 * if (acpi_lapic && acpi_ioapic) smp_found_config = 1; 1141 * if acpi_blacklisted() acpi_disabled = 1; 1142 * acpi_irq_model=... 1143 * ... 1144 * 1145 * return value: (currently ignored) 1146 * 0: success 1147 * !0: failure 1148 */ 1149 1150 int __init acpi_boot_table_init(void) 1151 { 1152 int error; 1153 1154 #ifdef __i386__ 1155 dmi_check_system(acpi_dmi_table); 1156 #endif 1157 1158 /* 1159 * If acpi_disabled, bail out 1160 * One exception: acpi=ht continues far enough to enumerate LAPICs 1161 */ 1162 if (acpi_disabled && !acpi_ht) 1163 return 1; 1164 1165 /* 1166 * Initialize the ACPI boot-time table parser. 1167 */ 1168 error = acpi_table_init(); 1169 if (error) { 1170 disable_acpi(); 1171 return error; 1172 } 1173 1174 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf); 1175 1176 /* 1177 * blacklist may disable ACPI entirely 1178 */ 1179 error = acpi_blacklisted(); 1180 if (error) { 1181 if (acpi_force) { 1182 printk(KERN_WARNING PREFIX "acpi=force override\n"); 1183 } else { 1184 printk(KERN_WARNING PREFIX "Disabling ACPI support\n"); 1185 disable_acpi(); 1186 return error; 1187 } 1188 } 1189 1190 return 0; 1191 } 1192 1193 int __init acpi_boot_init(void) 1194 { 1195 /* 1196 * If acpi_disabled, bail out 1197 * One exception: acpi=ht continues far enough to enumerate LAPICs 1198 */ 1199 if (acpi_disabled && !acpi_ht) 1200 return 1; 1201 1202 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf); 1203 1204 /* 1205 * set sci_int and PM timer address 1206 */ 1207 acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt); 1208 1209 /* 1210 * Process the Multiple APIC Description Table (MADT), if present 1211 */ 1212 acpi_process_madt(); 1213 1214 acpi_table_parse(ACPI_SIG_HPET, acpi_parse_hpet); 1215 1216 return 0; 1217 } 1218 1219 static int __init parse_acpi(char *arg) 1220 { 1221 if (!arg) 1222 return -EINVAL; 1223 1224 /* "acpi=off" disables both ACPI table parsing and interpreter */ 1225 if (strcmp(arg, "off") == 0) { 1226 disable_acpi(); 1227 } 1228 /* acpi=force to over-ride black-list */ 1229 else if (strcmp(arg, "force") == 0) { 1230 acpi_force = 1; 1231 acpi_ht = 1; 1232 acpi_disabled = 0; 1233 } 1234 /* acpi=strict disables out-of-spec workarounds */ 1235 else if (strcmp(arg, "strict") == 0) { 1236 acpi_strict = 1; 1237 } 1238 /* Limit ACPI just to boot-time to enable HT */ 1239 else if (strcmp(arg, "ht") == 0) { 1240 if (!acpi_force) 1241 disable_acpi(); 1242 acpi_ht = 1; 1243 } 1244 /* "acpi=noirq" disables ACPI interrupt routing */ 1245 else if (strcmp(arg, "noirq") == 0) { 1246 acpi_noirq_set(); 1247 } else { 1248 /* Core will printk when we return error. */ 1249 return -EINVAL; 1250 } 1251 return 0; 1252 } 1253 early_param("acpi", parse_acpi); 1254 1255 /* FIXME: Using pci= for an ACPI parameter is a travesty. */ 1256 static int __init parse_pci(char *arg) 1257 { 1258 if (arg && strcmp(arg, "noacpi") == 0) 1259 acpi_disable_pci(); 1260 return 0; 1261 } 1262 early_param("pci", parse_pci); 1263 1264 #ifdef CONFIG_X86_IO_APIC 1265 static int __init parse_acpi_skip_timer_override(char *arg) 1266 { 1267 acpi_skip_timer_override = 1; 1268 return 0; 1269 } 1270 early_param("acpi_skip_timer_override", parse_acpi_skip_timer_override); 1271 1272 static int __init parse_acpi_use_timer_override(char *arg) 1273 { 1274 acpi_use_timer_override = 1; 1275 return 0; 1276 } 1277 early_param("acpi_use_timer_override", parse_acpi_use_timer_override); 1278 #endif /* CONFIG_X86_IO_APIC */ 1279 1280 static int __init setup_acpi_sci(char *s) 1281 { 1282 if (!s) 1283 return -EINVAL; 1284 if (!strcmp(s, "edge")) 1285 acpi_sci_flags = ACPI_MADT_TRIGGER_EDGE | 1286 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK); 1287 else if (!strcmp(s, "level")) 1288 acpi_sci_flags = ACPI_MADT_TRIGGER_LEVEL | 1289 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK); 1290 else if (!strcmp(s, "high")) 1291 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_HIGH | 1292 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK); 1293 else if (!strcmp(s, "low")) 1294 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_LOW | 1295 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK); 1296 else 1297 return -EINVAL; 1298 return 0; 1299 } 1300 early_param("acpi_sci", setup_acpi_sci); 1301 1302 int __acpi_acquire_global_lock(unsigned int *lock) 1303 { 1304 unsigned int old, new, val; 1305 do { 1306 old = *lock; 1307 new = (((old & ~0x3) + 2) + ((old >> 1) & 0x1)); 1308 val = cmpxchg(lock, old, new); 1309 } while (unlikely (val != old)); 1310 return (new < 3) ? -1 : 0; 1311 } 1312 1313 int __acpi_release_global_lock(unsigned int *lock) 1314 { 1315 unsigned int old, new, val; 1316 do { 1317 old = *lock; 1318 new = old & ~0x3; 1319 val = cmpxchg(lock, old, new); 1320 } while (unlikely (val != old)); 1321 return old & 0x1; 1322 } 1323