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 #include <linux/pci.h> 37 38 #include <asm/pgtable.h> 39 #include <asm/io_apic.h> 40 #include <asm/apic.h> 41 #include <asm/io.h> 42 #include <asm/mpspec.h> 43 #include <asm/smp.h> 44 45 static int __initdata acpi_force = 0; 46 u32 acpi_rsdt_forced; 47 int acpi_disabled; 48 EXPORT_SYMBOL(acpi_disabled); 49 50 #ifdef CONFIG_X86_64 51 # include <asm/proto.h> 52 #endif /* X86 */ 53 54 #define BAD_MADT_ENTRY(entry, end) ( \ 55 (!entry) || (unsigned long)entry + sizeof(*entry) > end || \ 56 ((struct acpi_subtable_header *)entry)->length < sizeof(*entry)) 57 58 #define PREFIX "ACPI: " 59 60 int acpi_noirq; /* skip ACPI IRQ initialization */ 61 int acpi_pci_disabled; /* skip ACPI PCI scan and IRQ initialization */ 62 EXPORT_SYMBOL(acpi_pci_disabled); 63 int acpi_ht __initdata = 1; /* enable HT */ 64 65 int acpi_lapic; 66 int acpi_ioapic; 67 int acpi_strict; 68 69 u8 acpi_sci_flags __initdata; 70 int acpi_sci_override_gsi __initdata; 71 int acpi_skip_timer_override __initdata; 72 int acpi_use_timer_override __initdata; 73 74 #ifdef CONFIG_X86_LOCAL_APIC 75 static u64 acpi_lapic_addr __initdata = APIC_DEFAULT_PHYS_BASE; 76 #endif 77 78 #ifndef __HAVE_ARCH_CMPXCHG 79 #warning ACPI uses CMPXCHG, i486 and later hardware 80 #endif 81 82 /* -------------------------------------------------------------------------- 83 Boot-time Configuration 84 -------------------------------------------------------------------------- */ 85 86 /* 87 * The default interrupt routing model is PIC (8259). This gets 88 * overridden if IOAPICs are enumerated (below). 89 */ 90 enum acpi_irq_model_id acpi_irq_model = ACPI_IRQ_MODEL_PIC; 91 92 93 /* 94 * Temporarily use the virtual area starting from FIX_IO_APIC_BASE_END, 95 * to map the target physical address. The problem is that set_fixmap() 96 * provides a single page, and it is possible that the page is not 97 * sufficient. 98 * By using this area, we can map up to MAX_IO_APICS pages temporarily, 99 * i.e. until the next __va_range() call. 100 * 101 * Important Safety Note: The fixed I/O APIC page numbers are *subtracted* 102 * from the fixed base. That's why we start at FIX_IO_APIC_BASE_END and 103 * count idx down while incrementing the phys address. 104 */ 105 char *__init __acpi_map_table(unsigned long phys, unsigned long size) 106 { 107 108 if (!phys || !size) 109 return NULL; 110 111 return early_ioremap(phys, size); 112 } 113 void __init __acpi_unmap_table(char *map, unsigned long size) 114 { 115 if (!map || !size) 116 return; 117 118 early_iounmap(map, size); 119 } 120 121 #ifdef CONFIG_X86_LOCAL_APIC 122 static int __init acpi_parse_madt(struct acpi_table_header *table) 123 { 124 struct acpi_table_madt *madt = NULL; 125 126 if (!cpu_has_apic) 127 return -EINVAL; 128 129 madt = (struct acpi_table_madt *)table; 130 if (!madt) { 131 printk(KERN_WARNING PREFIX "Unable to map MADT\n"); 132 return -ENODEV; 133 } 134 135 if (madt->address) { 136 acpi_lapic_addr = (u64) madt->address; 137 138 printk(KERN_DEBUG PREFIX "Local APIC address 0x%08x\n", 139 madt->address); 140 } 141 142 default_acpi_madt_oem_check(madt->header.oem_id, 143 madt->header.oem_table_id); 144 145 return 0; 146 } 147 148 static void __cpuinit acpi_register_lapic(int id, u8 enabled) 149 { 150 unsigned int ver = 0; 151 152 if (!enabled) { 153 ++disabled_cpus; 154 return; 155 } 156 157 if (boot_cpu_physical_apicid != -1U) 158 ver = apic_version[boot_cpu_physical_apicid]; 159 160 generic_processor_info(id, ver); 161 } 162 163 static int __init 164 acpi_parse_x2apic(struct acpi_subtable_header *header, const unsigned long end) 165 { 166 struct acpi_madt_local_x2apic *processor = NULL; 167 168 processor = (struct acpi_madt_local_x2apic *)header; 169 170 if (BAD_MADT_ENTRY(processor, end)) 171 return -EINVAL; 172 173 acpi_table_print_madt_entry(header); 174 175 #ifdef CONFIG_X86_X2APIC 176 /* 177 * We need to register disabled CPU as well to permit 178 * counting disabled CPUs. This allows us to size 179 * cpus_possible_map more accurately, to permit 180 * to not preallocating memory for all NR_CPUS 181 * when we use CPU hotplug. 182 */ 183 acpi_register_lapic(processor->local_apic_id, /* APIC ID */ 184 processor->lapic_flags & ACPI_MADT_ENABLED); 185 #else 186 printk(KERN_WARNING PREFIX "x2apic entry ignored\n"); 187 #endif 188 189 return 0; 190 } 191 192 static int __init 193 acpi_parse_lapic(struct acpi_subtable_header * header, const unsigned long end) 194 { 195 struct acpi_madt_local_apic *processor = NULL; 196 197 processor = (struct acpi_madt_local_apic *)header; 198 199 if (BAD_MADT_ENTRY(processor, end)) 200 return -EINVAL; 201 202 acpi_table_print_madt_entry(header); 203 204 /* 205 * We need to register disabled CPU as well to permit 206 * counting disabled CPUs. This allows us to size 207 * cpus_possible_map more accurately, to permit 208 * to not preallocating memory for all NR_CPUS 209 * when we use CPU hotplug. 210 */ 211 acpi_register_lapic(processor->id, /* APIC ID */ 212 processor->lapic_flags & ACPI_MADT_ENABLED); 213 214 return 0; 215 } 216 217 static int __init 218 acpi_parse_sapic(struct acpi_subtable_header *header, const unsigned long end) 219 { 220 struct acpi_madt_local_sapic *processor = NULL; 221 222 processor = (struct acpi_madt_local_sapic *)header; 223 224 if (BAD_MADT_ENTRY(processor, end)) 225 return -EINVAL; 226 227 acpi_table_print_madt_entry(header); 228 229 acpi_register_lapic((processor->id << 8) | processor->eid,/* APIC ID */ 230 processor->lapic_flags & ACPI_MADT_ENABLED); 231 232 return 0; 233 } 234 235 static int __init 236 acpi_parse_lapic_addr_ovr(struct acpi_subtable_header * header, 237 const unsigned long end) 238 { 239 struct acpi_madt_local_apic_override *lapic_addr_ovr = NULL; 240 241 lapic_addr_ovr = (struct acpi_madt_local_apic_override *)header; 242 243 if (BAD_MADT_ENTRY(lapic_addr_ovr, end)) 244 return -EINVAL; 245 246 acpi_lapic_addr = lapic_addr_ovr->address; 247 248 return 0; 249 } 250 251 static int __init 252 acpi_parse_x2apic_nmi(struct acpi_subtable_header *header, 253 const unsigned long end) 254 { 255 struct acpi_madt_local_x2apic_nmi *x2apic_nmi = NULL; 256 257 x2apic_nmi = (struct acpi_madt_local_x2apic_nmi *)header; 258 259 if (BAD_MADT_ENTRY(x2apic_nmi, end)) 260 return -EINVAL; 261 262 acpi_table_print_madt_entry(header); 263 264 if (x2apic_nmi->lint != 1) 265 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n"); 266 267 return 0; 268 } 269 270 static int __init 271 acpi_parse_lapic_nmi(struct acpi_subtable_header * header, const unsigned long end) 272 { 273 struct acpi_madt_local_apic_nmi *lapic_nmi = NULL; 274 275 lapic_nmi = (struct acpi_madt_local_apic_nmi *)header; 276 277 if (BAD_MADT_ENTRY(lapic_nmi, end)) 278 return -EINVAL; 279 280 acpi_table_print_madt_entry(header); 281 282 if (lapic_nmi->lint != 1) 283 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n"); 284 285 return 0; 286 } 287 288 #endif /*CONFIG_X86_LOCAL_APIC */ 289 290 #ifdef CONFIG_X86_IO_APIC 291 292 static int __init 293 acpi_parse_ioapic(struct acpi_subtable_header * header, const unsigned long end) 294 { 295 struct acpi_madt_io_apic *ioapic = NULL; 296 297 ioapic = (struct acpi_madt_io_apic *)header; 298 299 if (BAD_MADT_ENTRY(ioapic, end)) 300 return -EINVAL; 301 302 acpi_table_print_madt_entry(header); 303 304 mp_register_ioapic(ioapic->id, 305 ioapic->address, ioapic->global_irq_base); 306 307 return 0; 308 } 309 310 /* 311 * Parse Interrupt Source Override for the ACPI SCI 312 */ 313 static void __init acpi_sci_ioapic_setup(u32 gsi, u16 polarity, u16 trigger) 314 { 315 if (trigger == 0) /* compatible SCI trigger is level */ 316 trigger = 3; 317 318 if (polarity == 0) /* compatible SCI polarity is low */ 319 polarity = 3; 320 321 /* Command-line over-ride via acpi_sci= */ 322 if (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) 323 trigger = (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2; 324 325 if (acpi_sci_flags & ACPI_MADT_POLARITY_MASK) 326 polarity = acpi_sci_flags & ACPI_MADT_POLARITY_MASK; 327 328 /* 329 * mp_config_acpi_legacy_irqs() already setup IRQs < 16 330 * If GSI is < 16, this will update its flags, 331 * else it will create a new mp_irqs[] entry. 332 */ 333 mp_override_legacy_irq(gsi, polarity, trigger, gsi); 334 335 /* 336 * stash over-ride to indicate we've been here 337 * and for later update of acpi_gbl_FADT 338 */ 339 acpi_sci_override_gsi = gsi; 340 return; 341 } 342 343 static int __init 344 acpi_parse_int_src_ovr(struct acpi_subtable_header * header, 345 const unsigned long end) 346 { 347 struct acpi_madt_interrupt_override *intsrc = NULL; 348 349 intsrc = (struct acpi_madt_interrupt_override *)header; 350 351 if (BAD_MADT_ENTRY(intsrc, end)) 352 return -EINVAL; 353 354 acpi_table_print_madt_entry(header); 355 356 if (intsrc->source_irq == acpi_gbl_FADT.sci_interrupt) { 357 acpi_sci_ioapic_setup(intsrc->global_irq, 358 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK, 359 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2); 360 return 0; 361 } 362 363 if (acpi_skip_timer_override && 364 intsrc->source_irq == 0 && intsrc->global_irq == 2) { 365 printk(PREFIX "BIOS IRQ0 pin2 override ignored.\n"); 366 return 0; 367 } 368 369 mp_override_legacy_irq(intsrc->source_irq, 370 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK, 371 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2, 372 intsrc->global_irq); 373 374 return 0; 375 } 376 377 static int __init 378 acpi_parse_nmi_src(struct acpi_subtable_header * header, const unsigned long end) 379 { 380 struct acpi_madt_nmi_source *nmi_src = NULL; 381 382 nmi_src = (struct acpi_madt_nmi_source *)header; 383 384 if (BAD_MADT_ENTRY(nmi_src, end)) 385 return -EINVAL; 386 387 acpi_table_print_madt_entry(header); 388 389 /* TBD: Support nimsrc entries? */ 390 391 return 0; 392 } 393 394 #endif /* CONFIG_X86_IO_APIC */ 395 396 /* 397 * acpi_pic_sci_set_trigger() 398 * 399 * use ELCR to set PIC-mode trigger type for SCI 400 * 401 * If a PIC-mode SCI is not recognized or gives spurious IRQ7's 402 * it may require Edge Trigger -- use "acpi_sci=edge" 403 * 404 * Port 0x4d0-4d1 are ECLR1 and ECLR2, the Edge/Level Control Registers 405 * for the 8259 PIC. bit[n] = 1 means irq[n] is Level, otherwise Edge. 406 * ECLR1 is IRQs 0-7 (IRQ 0, 1, 2 must be 0) 407 * ECLR2 is IRQs 8-15 (IRQ 8, 13 must be 0) 408 */ 409 410 void __init acpi_pic_sci_set_trigger(unsigned int irq, u16 trigger) 411 { 412 unsigned int mask = 1 << irq; 413 unsigned int old, new; 414 415 /* Real old ELCR mask */ 416 old = inb(0x4d0) | (inb(0x4d1) << 8); 417 418 /* 419 * If we use ACPI to set PCI IRQs, then we should clear ELCR 420 * since we will set it correctly as we enable the PCI irq 421 * routing. 422 */ 423 new = acpi_noirq ? old : 0; 424 425 /* 426 * Update SCI information in the ELCR, it isn't in the PCI 427 * routing tables.. 428 */ 429 switch (trigger) { 430 case 1: /* Edge - clear */ 431 new &= ~mask; 432 break; 433 case 3: /* Level - set */ 434 new |= mask; 435 break; 436 } 437 438 if (old == new) 439 return; 440 441 printk(PREFIX "setting ELCR to %04x (from %04x)\n", new, old); 442 outb(new, 0x4d0); 443 outb(new >> 8, 0x4d1); 444 } 445 446 int acpi_gsi_to_irq(u32 gsi, unsigned int *irq) 447 { 448 *irq = gsi; 449 return 0; 450 } 451 452 /* 453 * success: return IRQ number (>=0) 454 * failure: return < 0 455 */ 456 int acpi_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity) 457 { 458 unsigned int irq; 459 unsigned int plat_gsi = gsi; 460 461 #ifdef CONFIG_PCI 462 /* 463 * Make sure all (legacy) PCI IRQs are set as level-triggered. 464 */ 465 if (acpi_irq_model == ACPI_IRQ_MODEL_PIC) { 466 if (trigger == ACPI_LEVEL_SENSITIVE) 467 eisa_set_level_irq(gsi); 468 } 469 #endif 470 471 #ifdef CONFIG_X86_IO_APIC 472 if (acpi_irq_model == ACPI_IRQ_MODEL_IOAPIC) { 473 plat_gsi = mp_register_gsi(dev, gsi, trigger, polarity); 474 } 475 #endif 476 acpi_gsi_to_irq(plat_gsi, &irq); 477 return irq; 478 } 479 480 /* 481 * ACPI based hotplug support for CPU 482 */ 483 #ifdef CONFIG_ACPI_HOTPLUG_CPU 484 485 static int __cpuinit _acpi_map_lsapic(acpi_handle handle, int *pcpu) 486 { 487 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; 488 union acpi_object *obj; 489 struct acpi_madt_local_apic *lapic; 490 cpumask_var_t tmp_map, new_map; 491 u8 physid; 492 int cpu; 493 int retval = -ENOMEM; 494 495 if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer))) 496 return -EINVAL; 497 498 if (!buffer.length || !buffer.pointer) 499 return -EINVAL; 500 501 obj = buffer.pointer; 502 if (obj->type != ACPI_TYPE_BUFFER || 503 obj->buffer.length < sizeof(*lapic)) { 504 kfree(buffer.pointer); 505 return -EINVAL; 506 } 507 508 lapic = (struct acpi_madt_local_apic *)obj->buffer.pointer; 509 510 if (lapic->header.type != ACPI_MADT_TYPE_LOCAL_APIC || 511 !(lapic->lapic_flags & ACPI_MADT_ENABLED)) { 512 kfree(buffer.pointer); 513 return -EINVAL; 514 } 515 516 physid = lapic->id; 517 518 kfree(buffer.pointer); 519 buffer.length = ACPI_ALLOCATE_BUFFER; 520 buffer.pointer = NULL; 521 522 if (!alloc_cpumask_var(&tmp_map, GFP_KERNEL)) 523 goto out; 524 525 if (!alloc_cpumask_var(&new_map, GFP_KERNEL)) 526 goto free_tmp_map; 527 528 cpumask_copy(tmp_map, cpu_present_mask); 529 acpi_register_lapic(physid, lapic->lapic_flags & ACPI_MADT_ENABLED); 530 531 /* 532 * If mp_register_lapic successfully generates a new logical cpu 533 * number, then the following will get us exactly what was mapped 534 */ 535 cpumask_andnot(new_map, cpu_present_mask, tmp_map); 536 if (cpumask_empty(new_map)) { 537 printk ("Unable to map lapic to logical cpu number\n"); 538 retval = -EINVAL; 539 goto free_new_map; 540 } 541 542 cpu = cpumask_first(new_map); 543 544 *pcpu = cpu; 545 retval = 0; 546 547 free_new_map: 548 free_cpumask_var(new_map); 549 free_tmp_map: 550 free_cpumask_var(tmp_map); 551 out: 552 return retval; 553 } 554 555 /* wrapper to silence section mismatch warning */ 556 int __ref acpi_map_lsapic(acpi_handle handle, int *pcpu) 557 { 558 return _acpi_map_lsapic(handle, pcpu); 559 } 560 EXPORT_SYMBOL(acpi_map_lsapic); 561 562 int acpi_unmap_lsapic(int cpu) 563 { 564 per_cpu(x86_cpu_to_apicid, cpu) = -1; 565 set_cpu_present(cpu, false); 566 num_processors--; 567 568 return (0); 569 } 570 571 EXPORT_SYMBOL(acpi_unmap_lsapic); 572 #endif /* CONFIG_ACPI_HOTPLUG_CPU */ 573 574 int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base) 575 { 576 /* TBD */ 577 return -EINVAL; 578 } 579 580 EXPORT_SYMBOL(acpi_register_ioapic); 581 582 int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base) 583 { 584 /* TBD */ 585 return -EINVAL; 586 } 587 588 EXPORT_SYMBOL(acpi_unregister_ioapic); 589 590 static int __init acpi_parse_sbf(struct acpi_table_header *table) 591 { 592 struct acpi_table_boot *sb; 593 594 sb = (struct acpi_table_boot *)table; 595 if (!sb) { 596 printk(KERN_WARNING PREFIX "Unable to map SBF\n"); 597 return -ENODEV; 598 } 599 600 sbf_port = sb->cmos_index; /* Save CMOS port */ 601 602 return 0; 603 } 604 605 #ifdef CONFIG_HPET_TIMER 606 #include <asm/hpet.h> 607 608 static struct __initdata resource *hpet_res; 609 610 static int __init acpi_parse_hpet(struct acpi_table_header *table) 611 { 612 struct acpi_table_hpet *hpet_tbl; 613 614 hpet_tbl = (struct acpi_table_hpet *)table; 615 if (!hpet_tbl) { 616 printk(KERN_WARNING PREFIX "Unable to map HPET\n"); 617 return -ENODEV; 618 } 619 620 if (hpet_tbl->address.space_id != ACPI_SPACE_MEM) { 621 printk(KERN_WARNING PREFIX "HPET timers must be located in " 622 "memory.\n"); 623 return -1; 624 } 625 626 hpet_address = hpet_tbl->address.address; 627 628 /* 629 * Some broken BIOSes advertise HPET at 0x0. We really do not 630 * want to allocate a resource there. 631 */ 632 if (!hpet_address) { 633 printk(KERN_WARNING PREFIX 634 "HPET id: %#x base: %#lx is invalid\n", 635 hpet_tbl->id, hpet_address); 636 return 0; 637 } 638 #ifdef CONFIG_X86_64 639 /* 640 * Some even more broken BIOSes advertise HPET at 641 * 0xfed0000000000000 instead of 0xfed00000. Fix it up and add 642 * some noise: 643 */ 644 if (hpet_address == 0xfed0000000000000UL) { 645 if (!hpet_force_user) { 646 printk(KERN_WARNING PREFIX "HPET id: %#x " 647 "base: 0xfed0000000000000 is bogus\n " 648 "try hpet=force on the kernel command line to " 649 "fix it up to 0xfed00000.\n", hpet_tbl->id); 650 hpet_address = 0; 651 return 0; 652 } 653 printk(KERN_WARNING PREFIX 654 "HPET id: %#x base: 0xfed0000000000000 fixed up " 655 "to 0xfed00000.\n", hpet_tbl->id); 656 hpet_address >>= 32; 657 } 658 #endif 659 printk(KERN_INFO PREFIX "HPET id: %#x base: %#lx\n", 660 hpet_tbl->id, hpet_address); 661 662 /* 663 * Allocate and initialize the HPET firmware resource for adding into 664 * the resource tree during the lateinit timeframe. 665 */ 666 #define HPET_RESOURCE_NAME_SIZE 9 667 hpet_res = alloc_bootmem(sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE); 668 669 hpet_res->name = (void *)&hpet_res[1]; 670 hpet_res->flags = IORESOURCE_MEM; 671 snprintf((char *)hpet_res->name, HPET_RESOURCE_NAME_SIZE, "HPET %u", 672 hpet_tbl->sequence); 673 674 hpet_res->start = hpet_address; 675 hpet_res->end = hpet_address + (1 * 1024) - 1; 676 677 return 0; 678 } 679 680 /* 681 * hpet_insert_resource inserts the HPET resources used into the resource 682 * tree. 683 */ 684 static __init int hpet_insert_resource(void) 685 { 686 if (!hpet_res) 687 return 1; 688 689 return insert_resource(&iomem_resource, hpet_res); 690 } 691 692 late_initcall(hpet_insert_resource); 693 694 #else 695 #define acpi_parse_hpet NULL 696 #endif 697 698 static int __init acpi_parse_fadt(struct acpi_table_header *table) 699 { 700 701 #ifdef CONFIG_X86_PM_TIMER 702 /* detect the location of the ACPI PM Timer */ 703 if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID) { 704 /* FADT rev. 2 */ 705 if (acpi_gbl_FADT.xpm_timer_block.space_id != 706 ACPI_ADR_SPACE_SYSTEM_IO) 707 return 0; 708 709 pmtmr_ioport = acpi_gbl_FADT.xpm_timer_block.address; 710 /* 711 * "X" fields are optional extensions to the original V1.0 712 * fields, so we must selectively expand V1.0 fields if the 713 * corresponding X field is zero. 714 */ 715 if (!pmtmr_ioport) 716 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block; 717 } else { 718 /* FADT rev. 1 */ 719 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block; 720 } 721 if (pmtmr_ioport) 722 printk(KERN_INFO PREFIX "PM-Timer IO Port: %#x\n", 723 pmtmr_ioport); 724 #endif 725 return 0; 726 } 727 728 #ifdef CONFIG_X86_LOCAL_APIC 729 /* 730 * Parse LAPIC entries in MADT 731 * returns 0 on success, < 0 on error 732 */ 733 734 static void __init acpi_register_lapic_address(unsigned long address) 735 { 736 mp_lapic_addr = address; 737 738 set_fixmap_nocache(FIX_APIC_BASE, address); 739 if (boot_cpu_physical_apicid == -1U) { 740 boot_cpu_physical_apicid = read_apic_id(); 741 apic_version[boot_cpu_physical_apicid] = 742 GET_APIC_VERSION(apic_read(APIC_LVR)); 743 } 744 } 745 746 static int __init early_acpi_parse_madt_lapic_addr_ovr(void) 747 { 748 int count; 749 750 if (!cpu_has_apic) 751 return -ENODEV; 752 753 /* 754 * Note that the LAPIC address is obtained from the MADT (32-bit value) 755 * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value). 756 */ 757 758 count = 759 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE, 760 acpi_parse_lapic_addr_ovr, 0); 761 if (count < 0) { 762 printk(KERN_ERR PREFIX 763 "Error parsing LAPIC address override entry\n"); 764 return count; 765 } 766 767 acpi_register_lapic_address(acpi_lapic_addr); 768 769 return count; 770 } 771 772 static int __init acpi_parse_madt_lapic_entries(void) 773 { 774 int count; 775 int x2count = 0; 776 777 if (!cpu_has_apic) 778 return -ENODEV; 779 780 /* 781 * Note that the LAPIC address is obtained from the MADT (32-bit value) 782 * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value). 783 */ 784 785 count = 786 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE, 787 acpi_parse_lapic_addr_ovr, 0); 788 if (count < 0) { 789 printk(KERN_ERR PREFIX 790 "Error parsing LAPIC address override entry\n"); 791 return count; 792 } 793 794 acpi_register_lapic_address(acpi_lapic_addr); 795 796 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC, 797 acpi_parse_sapic, MAX_APICS); 798 799 if (!count) { 800 x2count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC, 801 acpi_parse_x2apic, MAX_APICS); 802 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC, 803 acpi_parse_lapic, MAX_APICS); 804 } 805 if (!count && !x2count) { 806 printk(KERN_ERR PREFIX "No LAPIC entries present\n"); 807 /* TBD: Cleanup to allow fallback to MPS */ 808 return -ENODEV; 809 } else if (count < 0 || x2count < 0) { 810 printk(KERN_ERR PREFIX "Error parsing LAPIC entry\n"); 811 /* TBD: Cleanup to allow fallback to MPS */ 812 return count; 813 } 814 815 x2count = 816 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC_NMI, 817 acpi_parse_x2apic_nmi, 0); 818 count = 819 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI, acpi_parse_lapic_nmi, 0); 820 if (count < 0 || x2count < 0) { 821 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n"); 822 /* TBD: Cleanup to allow fallback to MPS */ 823 return count; 824 } 825 return 0; 826 } 827 #endif /* CONFIG_X86_LOCAL_APIC */ 828 829 #ifdef CONFIG_X86_IO_APIC 830 #define MP_ISA_BUS 0 831 832 #ifdef CONFIG_X86_ES7000 833 extern int es7000_plat; 834 #endif 835 836 int __init acpi_probe_gsi(void) 837 { 838 int idx; 839 int gsi; 840 int max_gsi = 0; 841 842 if (acpi_disabled) 843 return 0; 844 845 if (!acpi_ioapic) 846 return 0; 847 848 max_gsi = 0; 849 for (idx = 0; idx < nr_ioapics; idx++) { 850 gsi = mp_gsi_routing[idx].gsi_end; 851 852 if (gsi > max_gsi) 853 max_gsi = gsi; 854 } 855 856 return max_gsi + 1; 857 } 858 859 static void assign_to_mp_irq(struct mpc_intsrc *m, 860 struct mpc_intsrc *mp_irq) 861 { 862 memcpy(mp_irq, m, sizeof(struct mpc_intsrc)); 863 } 864 865 static int mp_irq_cmp(struct mpc_intsrc *mp_irq, 866 struct mpc_intsrc *m) 867 { 868 return memcmp(mp_irq, m, sizeof(struct mpc_intsrc)); 869 } 870 871 static void save_mp_irq(struct mpc_intsrc *m) 872 { 873 int i; 874 875 for (i = 0; i < mp_irq_entries; i++) { 876 if (!mp_irq_cmp(&mp_irqs[i], m)) 877 return; 878 } 879 880 assign_to_mp_irq(m, &mp_irqs[mp_irq_entries]); 881 if (++mp_irq_entries == MAX_IRQ_SOURCES) 882 panic("Max # of irq sources exceeded!!\n"); 883 } 884 885 void __init mp_override_legacy_irq(u8 bus_irq, u8 polarity, u8 trigger, u32 gsi) 886 { 887 int ioapic; 888 int pin; 889 struct mpc_intsrc mp_irq; 890 891 /* 892 * Convert 'gsi' to 'ioapic.pin'. 893 */ 894 ioapic = mp_find_ioapic(gsi); 895 if (ioapic < 0) 896 return; 897 pin = mp_find_ioapic_pin(ioapic, gsi); 898 899 /* 900 * TBD: This check is for faulty timer entries, where the override 901 * erroneously sets the trigger to level, resulting in a HUGE 902 * increase of timer interrupts! 903 */ 904 if ((bus_irq == 0) && (trigger == 3)) 905 trigger = 1; 906 907 mp_irq.type = MP_INTSRC; 908 mp_irq.irqtype = mp_INT; 909 mp_irq.irqflag = (trigger << 2) | polarity; 910 mp_irq.srcbus = MP_ISA_BUS; 911 mp_irq.srcbusirq = bus_irq; /* IRQ */ 912 mp_irq.dstapic = mp_ioapics[ioapic].apicid; /* APIC ID */ 913 mp_irq.dstirq = pin; /* INTIN# */ 914 915 save_mp_irq(&mp_irq); 916 } 917 918 void __init mp_config_acpi_legacy_irqs(void) 919 { 920 int i; 921 int ioapic; 922 unsigned int dstapic; 923 struct mpc_intsrc mp_irq; 924 925 #if defined (CONFIG_MCA) || defined (CONFIG_EISA) 926 /* 927 * Fabricate the legacy ISA bus (bus #31). 928 */ 929 mp_bus_id_to_type[MP_ISA_BUS] = MP_BUS_ISA; 930 #endif 931 set_bit(MP_ISA_BUS, mp_bus_not_pci); 932 pr_debug("Bus #%d is ISA\n", MP_ISA_BUS); 933 934 #ifdef CONFIG_X86_ES7000 935 /* 936 * Older generations of ES7000 have no legacy identity mappings 937 */ 938 if (es7000_plat == 1) 939 return; 940 #endif 941 942 /* 943 * Locate the IOAPIC that manages the ISA IRQs (0-15). 944 */ 945 ioapic = mp_find_ioapic(0); 946 if (ioapic < 0) 947 return; 948 dstapic = mp_ioapics[ioapic].apicid; 949 950 /* 951 * Use the default configuration for the IRQs 0-15. Unless 952 * overridden by (MADT) interrupt source override entries. 953 */ 954 for (i = 0; i < 16; i++) { 955 int idx; 956 957 for (idx = 0; idx < mp_irq_entries; idx++) { 958 struct mpc_intsrc *irq = mp_irqs + idx; 959 960 /* Do we already have a mapping for this ISA IRQ? */ 961 if (irq->srcbus == MP_ISA_BUS && irq->srcbusirq == i) 962 break; 963 964 /* Do we already have a mapping for this IOAPIC pin */ 965 if (irq->dstapic == dstapic && irq->dstirq == i) 966 break; 967 } 968 969 if (idx != mp_irq_entries) { 970 printk(KERN_DEBUG "ACPI: IRQ%d used by override.\n", i); 971 continue; /* IRQ already used */ 972 } 973 974 mp_irq.type = MP_INTSRC; 975 mp_irq.irqflag = 0; /* Conforming */ 976 mp_irq.srcbus = MP_ISA_BUS; 977 mp_irq.dstapic = dstapic; 978 mp_irq.irqtype = mp_INT; 979 mp_irq.srcbusirq = i; /* Identity mapped */ 980 mp_irq.dstirq = i; 981 982 save_mp_irq(&mp_irq); 983 } 984 } 985 986 static int mp_config_acpi_gsi(struct device *dev, u32 gsi, int trigger, 987 int polarity) 988 { 989 #ifdef CONFIG_X86_MPPARSE 990 struct mpc_intsrc mp_irq; 991 struct pci_dev *pdev; 992 unsigned char number; 993 unsigned int devfn; 994 int ioapic; 995 u8 pin; 996 997 if (!acpi_ioapic) 998 return 0; 999 if (!dev) 1000 return 0; 1001 if (dev->bus != &pci_bus_type) 1002 return 0; 1003 1004 pdev = to_pci_dev(dev); 1005 number = pdev->bus->number; 1006 devfn = pdev->devfn; 1007 pin = pdev->pin; 1008 /* print the entry should happen on mptable identically */ 1009 mp_irq.type = MP_INTSRC; 1010 mp_irq.irqtype = mp_INT; 1011 mp_irq.irqflag = (trigger == ACPI_EDGE_SENSITIVE ? 4 : 0x0c) | 1012 (polarity == ACPI_ACTIVE_HIGH ? 1 : 3); 1013 mp_irq.srcbus = number; 1014 mp_irq.srcbusirq = (((devfn >> 3) & 0x1f) << 2) | ((pin - 1) & 3); 1015 ioapic = mp_find_ioapic(gsi); 1016 mp_irq.dstapic = mp_ioapics[ioapic].apicid; 1017 mp_irq.dstirq = mp_find_ioapic_pin(ioapic, gsi); 1018 1019 save_mp_irq(&mp_irq); 1020 #endif 1021 return 0; 1022 } 1023 1024 int mp_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity) 1025 { 1026 int ioapic; 1027 int ioapic_pin; 1028 struct io_apic_irq_attr irq_attr; 1029 1030 if (acpi_irq_model != ACPI_IRQ_MODEL_IOAPIC) 1031 return gsi; 1032 1033 /* Don't set up the ACPI SCI because it's already set up */ 1034 if (acpi_gbl_FADT.sci_interrupt == gsi) 1035 return gsi; 1036 1037 ioapic = mp_find_ioapic(gsi); 1038 if (ioapic < 0) { 1039 printk(KERN_WARNING "No IOAPIC for GSI %u\n", gsi); 1040 return gsi; 1041 } 1042 1043 ioapic_pin = mp_find_ioapic_pin(ioapic, gsi); 1044 1045 #ifdef CONFIG_X86_32 1046 if (ioapic_renumber_irq) 1047 gsi = ioapic_renumber_irq(ioapic, gsi); 1048 #endif 1049 1050 if (ioapic_pin > MP_MAX_IOAPIC_PIN) { 1051 printk(KERN_ERR "Invalid reference to IOAPIC pin " 1052 "%d-%d\n", mp_ioapics[ioapic].apicid, 1053 ioapic_pin); 1054 return gsi; 1055 } 1056 1057 if (enable_update_mptable) 1058 mp_config_acpi_gsi(dev, gsi, trigger, polarity); 1059 1060 set_io_apic_irq_attr(&irq_attr, ioapic, ioapic_pin, 1061 trigger == ACPI_EDGE_SENSITIVE ? 0 : 1, 1062 polarity == ACPI_ACTIVE_HIGH ? 0 : 1); 1063 io_apic_set_pci_routing(dev, gsi, &irq_attr); 1064 1065 return gsi; 1066 } 1067 1068 /* 1069 * Parse IOAPIC related entries in MADT 1070 * returns 0 on success, < 0 on error 1071 */ 1072 static int __init acpi_parse_madt_ioapic_entries(void) 1073 { 1074 int count; 1075 1076 /* 1077 * ACPI interpreter is required to complete interrupt setup, 1078 * so if it is off, don't enumerate the io-apics with ACPI. 1079 * If MPS is present, it will handle them, 1080 * otherwise the system will stay in PIC mode 1081 */ 1082 if (acpi_disabled || acpi_noirq) 1083 return -ENODEV; 1084 1085 if (!cpu_has_apic) 1086 return -ENODEV; 1087 1088 /* 1089 * if "noapic" boot option, don't look for IO-APICs 1090 */ 1091 if (skip_ioapic_setup) { 1092 printk(KERN_INFO PREFIX "Skipping IOAPIC probe " 1093 "due to 'noapic' option.\n"); 1094 return -ENODEV; 1095 } 1096 1097 count = 1098 acpi_table_parse_madt(ACPI_MADT_TYPE_IO_APIC, acpi_parse_ioapic, 1099 MAX_IO_APICS); 1100 if (!count) { 1101 printk(KERN_ERR PREFIX "No IOAPIC entries present\n"); 1102 return -ENODEV; 1103 } else if (count < 0) { 1104 printk(KERN_ERR PREFIX "Error parsing IOAPIC entry\n"); 1105 return count; 1106 } 1107 1108 count = 1109 acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE, acpi_parse_int_src_ovr, 1110 nr_irqs); 1111 if (count < 0) { 1112 printk(KERN_ERR PREFIX 1113 "Error parsing interrupt source overrides entry\n"); 1114 /* TBD: Cleanup to allow fallback to MPS */ 1115 return count; 1116 } 1117 1118 /* 1119 * If BIOS did not supply an INT_SRC_OVR for the SCI 1120 * pretend we got one so we can set the SCI flags. 1121 */ 1122 if (!acpi_sci_override_gsi) 1123 acpi_sci_ioapic_setup(acpi_gbl_FADT.sci_interrupt, 0, 0); 1124 1125 /* Fill in identity legacy mapings where no override */ 1126 mp_config_acpi_legacy_irqs(); 1127 1128 count = 1129 acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE, acpi_parse_nmi_src, 1130 nr_irqs); 1131 if (count < 0) { 1132 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n"); 1133 /* TBD: Cleanup to allow fallback to MPS */ 1134 return count; 1135 } 1136 1137 return 0; 1138 } 1139 #else 1140 static inline int acpi_parse_madt_ioapic_entries(void) 1141 { 1142 return -1; 1143 } 1144 #endif /* !CONFIG_X86_IO_APIC */ 1145 1146 static void __init early_acpi_process_madt(void) 1147 { 1148 #ifdef CONFIG_X86_LOCAL_APIC 1149 int error; 1150 1151 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) { 1152 1153 /* 1154 * Parse MADT LAPIC entries 1155 */ 1156 error = early_acpi_parse_madt_lapic_addr_ovr(); 1157 if (!error) { 1158 acpi_lapic = 1; 1159 smp_found_config = 1; 1160 } 1161 if (error == -EINVAL) { 1162 /* 1163 * Dell Precision Workstation 410, 610 come here. 1164 */ 1165 printk(KERN_ERR PREFIX 1166 "Invalid BIOS MADT, disabling ACPI\n"); 1167 disable_acpi(); 1168 } 1169 } 1170 #endif 1171 } 1172 1173 static void __init acpi_process_madt(void) 1174 { 1175 #ifdef CONFIG_X86_LOCAL_APIC 1176 int error; 1177 1178 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) { 1179 1180 /* 1181 * Parse MADT LAPIC entries 1182 */ 1183 error = acpi_parse_madt_lapic_entries(); 1184 if (!error) { 1185 acpi_lapic = 1; 1186 1187 #ifdef CONFIG_X86_BIGSMP 1188 generic_bigsmp_probe(); 1189 #endif 1190 /* 1191 * Parse MADT IO-APIC entries 1192 */ 1193 error = acpi_parse_madt_ioapic_entries(); 1194 if (!error) { 1195 acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC; 1196 acpi_ioapic = 1; 1197 1198 smp_found_config = 1; 1199 if (apic->setup_apic_routing) 1200 apic->setup_apic_routing(); 1201 } 1202 } 1203 if (error == -EINVAL) { 1204 /* 1205 * Dell Precision Workstation 410, 610 come here. 1206 */ 1207 printk(KERN_ERR PREFIX 1208 "Invalid BIOS MADT, disabling ACPI\n"); 1209 disable_acpi(); 1210 } 1211 } else { 1212 /* 1213 * ACPI found no MADT, and so ACPI wants UP PIC mode. 1214 * In the event an MPS table was found, forget it. 1215 * Boot with "acpi=off" to use MPS on such a system. 1216 */ 1217 if (smp_found_config) { 1218 printk(KERN_WARNING PREFIX 1219 "No APIC-table, disabling MPS\n"); 1220 smp_found_config = 0; 1221 } 1222 } 1223 1224 /* 1225 * ACPI supports both logical (e.g. Hyper-Threading) and physical 1226 * processors, where MPS only supports physical. 1227 */ 1228 if (acpi_lapic && acpi_ioapic) 1229 printk(KERN_INFO "Using ACPI (MADT) for SMP configuration " 1230 "information\n"); 1231 else if (acpi_lapic) 1232 printk(KERN_INFO "Using ACPI for processor (LAPIC) " 1233 "configuration information\n"); 1234 #endif 1235 return; 1236 } 1237 1238 static int __init disable_acpi_irq(const struct dmi_system_id *d) 1239 { 1240 if (!acpi_force) { 1241 printk(KERN_NOTICE "%s detected: force use of acpi=noirq\n", 1242 d->ident); 1243 acpi_noirq_set(); 1244 } 1245 return 0; 1246 } 1247 1248 static int __init disable_acpi_pci(const struct dmi_system_id *d) 1249 { 1250 if (!acpi_force) { 1251 printk(KERN_NOTICE "%s detected: force use of pci=noacpi\n", 1252 d->ident); 1253 acpi_disable_pci(); 1254 } 1255 return 0; 1256 } 1257 1258 static int __init dmi_disable_acpi(const struct dmi_system_id *d) 1259 { 1260 if (!acpi_force) { 1261 printk(KERN_NOTICE "%s detected: acpi off\n", d->ident); 1262 disable_acpi(); 1263 } else { 1264 printk(KERN_NOTICE 1265 "Warning: DMI blacklist says broken, but acpi forced\n"); 1266 } 1267 return 0; 1268 } 1269 1270 /* 1271 * Limit ACPI to CPU enumeration for HT 1272 */ 1273 static int __init force_acpi_ht(const struct dmi_system_id *d) 1274 { 1275 if (!acpi_force) { 1276 printk(KERN_NOTICE "%s detected: force use of acpi=ht\n", 1277 d->ident); 1278 disable_acpi(); 1279 acpi_ht = 1; 1280 } else { 1281 printk(KERN_NOTICE 1282 "Warning: acpi=force overrules DMI blacklist: acpi=ht\n"); 1283 } 1284 return 0; 1285 } 1286 1287 /* 1288 * Force ignoring BIOS IRQ0 pin2 override 1289 */ 1290 static int __init dmi_ignore_irq0_timer_override(const struct dmi_system_id *d) 1291 { 1292 /* 1293 * The ati_ixp4x0_rev() early PCI quirk should have set 1294 * the acpi_skip_timer_override flag already: 1295 */ 1296 if (!acpi_skip_timer_override) { 1297 WARN(1, KERN_ERR "ati_ixp4x0 quirk not complete.\n"); 1298 pr_notice("%s detected: Ignoring BIOS IRQ0 pin2 override\n", 1299 d->ident); 1300 acpi_skip_timer_override = 1; 1301 } 1302 return 0; 1303 } 1304 1305 /* 1306 * If your system is blacklisted here, but you find that acpi=force 1307 * works for you, please contact linux-acpi@vger.kernel.org 1308 */ 1309 static struct dmi_system_id __initdata acpi_dmi_table[] = { 1310 /* 1311 * Boxes that need ACPI disabled 1312 */ 1313 { 1314 .callback = dmi_disable_acpi, 1315 .ident = "IBM Thinkpad", 1316 .matches = { 1317 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), 1318 DMI_MATCH(DMI_BOARD_NAME, "2629H1G"), 1319 }, 1320 }, 1321 1322 /* 1323 * Boxes that need acpi=ht 1324 */ 1325 { 1326 .callback = force_acpi_ht, 1327 .ident = "FSC Primergy T850", 1328 .matches = { 1329 DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"), 1330 DMI_MATCH(DMI_PRODUCT_NAME, "PRIMERGY T850"), 1331 }, 1332 }, 1333 { 1334 .callback = force_acpi_ht, 1335 .ident = "HP VISUALIZE NT Workstation", 1336 .matches = { 1337 DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"), 1338 DMI_MATCH(DMI_PRODUCT_NAME, "HP VISUALIZE NT Workstation"), 1339 }, 1340 }, 1341 { 1342 .callback = force_acpi_ht, 1343 .ident = "Compaq Workstation W8000", 1344 .matches = { 1345 DMI_MATCH(DMI_SYS_VENDOR, "Compaq"), 1346 DMI_MATCH(DMI_PRODUCT_NAME, "Workstation W8000"), 1347 }, 1348 }, 1349 { 1350 .callback = force_acpi_ht, 1351 .ident = "ASUS P2B-DS", 1352 .matches = { 1353 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."), 1354 DMI_MATCH(DMI_BOARD_NAME, "P2B-DS"), 1355 }, 1356 }, 1357 { 1358 .callback = force_acpi_ht, 1359 .ident = "ASUS CUR-DLS", 1360 .matches = { 1361 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."), 1362 DMI_MATCH(DMI_BOARD_NAME, "CUR-DLS"), 1363 }, 1364 }, 1365 { 1366 .callback = force_acpi_ht, 1367 .ident = "ABIT i440BX-W83977", 1368 .matches = { 1369 DMI_MATCH(DMI_BOARD_VENDOR, "ABIT <http://www.abit.com>"), 1370 DMI_MATCH(DMI_BOARD_NAME, "i440BX-W83977 (BP6)"), 1371 }, 1372 }, 1373 { 1374 .callback = force_acpi_ht, 1375 .ident = "IBM Bladecenter", 1376 .matches = { 1377 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), 1378 DMI_MATCH(DMI_BOARD_NAME, "IBM eServer BladeCenter HS20"), 1379 }, 1380 }, 1381 { 1382 .callback = force_acpi_ht, 1383 .ident = "IBM eServer xSeries 360", 1384 .matches = { 1385 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), 1386 DMI_MATCH(DMI_BOARD_NAME, "eServer xSeries 360"), 1387 }, 1388 }, 1389 { 1390 .callback = force_acpi_ht, 1391 .ident = "IBM eserver xSeries 330", 1392 .matches = { 1393 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), 1394 DMI_MATCH(DMI_BOARD_NAME, "eserver xSeries 330"), 1395 }, 1396 }, 1397 { 1398 .callback = force_acpi_ht, 1399 .ident = "IBM eserver xSeries 440", 1400 .matches = { 1401 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), 1402 DMI_MATCH(DMI_PRODUCT_NAME, "eserver xSeries 440"), 1403 }, 1404 }, 1405 1406 /* 1407 * Boxes that need ACPI PCI IRQ routing disabled 1408 */ 1409 { 1410 .callback = disable_acpi_irq, 1411 .ident = "ASUS A7V", 1412 .matches = { 1413 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC"), 1414 DMI_MATCH(DMI_BOARD_NAME, "<A7V>"), 1415 /* newer BIOS, Revision 1011, does work */ 1416 DMI_MATCH(DMI_BIOS_VERSION, 1417 "ASUS A7V ACPI BIOS Revision 1007"), 1418 }, 1419 }, 1420 { 1421 /* 1422 * Latest BIOS for IBM 600E (1.16) has bad pcinum 1423 * for LPC bridge, which is needed for the PCI 1424 * interrupt links to work. DSDT fix is in bug 5966. 1425 * 2645, 2646 model numbers are shared with 600/600E/600X 1426 */ 1427 .callback = disable_acpi_irq, 1428 .ident = "IBM Thinkpad 600 Series 2645", 1429 .matches = { 1430 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), 1431 DMI_MATCH(DMI_BOARD_NAME, "2645"), 1432 }, 1433 }, 1434 { 1435 .callback = disable_acpi_irq, 1436 .ident = "IBM Thinkpad 600 Series 2646", 1437 .matches = { 1438 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), 1439 DMI_MATCH(DMI_BOARD_NAME, "2646"), 1440 }, 1441 }, 1442 /* 1443 * Boxes that need ACPI PCI IRQ routing and PCI scan disabled 1444 */ 1445 { /* _BBN 0 bug */ 1446 .callback = disable_acpi_pci, 1447 .ident = "ASUS PR-DLS", 1448 .matches = { 1449 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."), 1450 DMI_MATCH(DMI_BOARD_NAME, "PR-DLS"), 1451 DMI_MATCH(DMI_BIOS_VERSION, 1452 "ASUS PR-DLS ACPI BIOS Revision 1010"), 1453 DMI_MATCH(DMI_BIOS_DATE, "03/21/2003") 1454 }, 1455 }, 1456 { 1457 .callback = disable_acpi_pci, 1458 .ident = "Acer TravelMate 36x Laptop", 1459 .matches = { 1460 DMI_MATCH(DMI_SYS_VENDOR, "Acer"), 1461 DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"), 1462 }, 1463 }, 1464 {} 1465 }; 1466 1467 /* second table for DMI checks that should run after early-quirks */ 1468 static struct dmi_system_id __initdata acpi_dmi_table_late[] = { 1469 /* 1470 * HP laptops which use a DSDT reporting as HP/SB400/10000, 1471 * which includes some code which overrides all temperature 1472 * trip points to 16C if the INTIN2 input of the I/O APIC 1473 * is enabled. This input is incorrectly designated the 1474 * ISA IRQ 0 via an interrupt source override even though 1475 * it is wired to the output of the master 8259A and INTIN0 1476 * is not connected at all. Force ignoring BIOS IRQ0 pin2 1477 * override in that cases. 1478 */ 1479 { 1480 .callback = dmi_ignore_irq0_timer_override, 1481 .ident = "HP nx6115 laptop", 1482 .matches = { 1483 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 1484 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6115"), 1485 }, 1486 }, 1487 { 1488 .callback = dmi_ignore_irq0_timer_override, 1489 .ident = "HP NX6125 laptop", 1490 .matches = { 1491 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 1492 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6125"), 1493 }, 1494 }, 1495 { 1496 .callback = dmi_ignore_irq0_timer_override, 1497 .ident = "HP NX6325 laptop", 1498 .matches = { 1499 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 1500 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6325"), 1501 }, 1502 }, 1503 { 1504 .callback = dmi_ignore_irq0_timer_override, 1505 .ident = "HP 6715b laptop", 1506 .matches = { 1507 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 1508 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq 6715b"), 1509 }, 1510 }, 1511 {} 1512 }; 1513 1514 /* 1515 * acpi_boot_table_init() and acpi_boot_init() 1516 * called from setup_arch(), always. 1517 * 1. checksums all tables 1518 * 2. enumerates lapics 1519 * 3. enumerates io-apics 1520 * 1521 * acpi_table_init() is separate to allow reading SRAT without 1522 * other side effects. 1523 * 1524 * side effects of acpi_boot_init: 1525 * acpi_lapic = 1 if LAPIC found 1526 * acpi_ioapic = 1 if IOAPIC found 1527 * if (acpi_lapic && acpi_ioapic) smp_found_config = 1; 1528 * if acpi_blacklisted() acpi_disabled = 1; 1529 * acpi_irq_model=... 1530 * ... 1531 * 1532 * return value: (currently ignored) 1533 * 0: success 1534 * !0: failure 1535 */ 1536 1537 int __init acpi_boot_table_init(void) 1538 { 1539 int error; 1540 1541 dmi_check_system(acpi_dmi_table); 1542 1543 /* 1544 * If acpi_disabled, bail out 1545 * One exception: acpi=ht continues far enough to enumerate LAPICs 1546 */ 1547 if (acpi_disabled && !acpi_ht) 1548 return 1; 1549 1550 /* 1551 * Initialize the ACPI boot-time table parser. 1552 */ 1553 error = acpi_table_init(); 1554 if (error) { 1555 disable_acpi(); 1556 return error; 1557 } 1558 1559 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf); 1560 1561 /* 1562 * blacklist may disable ACPI entirely 1563 */ 1564 error = acpi_blacklisted(); 1565 if (error) { 1566 if (acpi_force) { 1567 printk(KERN_WARNING PREFIX "acpi=force override\n"); 1568 } else { 1569 printk(KERN_WARNING PREFIX "Disabling ACPI support\n"); 1570 disable_acpi(); 1571 return error; 1572 } 1573 } 1574 1575 return 0; 1576 } 1577 1578 int __init early_acpi_boot_init(void) 1579 { 1580 /* 1581 * If acpi_disabled, bail out 1582 * One exception: acpi=ht continues far enough to enumerate LAPICs 1583 */ 1584 if (acpi_disabled && !acpi_ht) 1585 return 1; 1586 1587 /* 1588 * Process the Multiple APIC Description Table (MADT), if present 1589 */ 1590 early_acpi_process_madt(); 1591 1592 return 0; 1593 } 1594 1595 int __init acpi_boot_init(void) 1596 { 1597 /* those are executed after early-quirks are executed */ 1598 dmi_check_system(acpi_dmi_table_late); 1599 1600 /* 1601 * If acpi_disabled, bail out 1602 * One exception: acpi=ht continues far enough to enumerate LAPICs 1603 */ 1604 if (acpi_disabled && !acpi_ht) 1605 return 1; 1606 1607 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf); 1608 1609 /* 1610 * set sci_int and PM timer address 1611 */ 1612 acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt); 1613 1614 /* 1615 * Process the Multiple APIC Description Table (MADT), if present 1616 */ 1617 acpi_process_madt(); 1618 1619 acpi_table_parse(ACPI_SIG_HPET, acpi_parse_hpet); 1620 1621 return 0; 1622 } 1623 1624 static int __init parse_acpi(char *arg) 1625 { 1626 if (!arg) 1627 return -EINVAL; 1628 1629 /* "acpi=off" disables both ACPI table parsing and interpreter */ 1630 if (strcmp(arg, "off") == 0) { 1631 disable_acpi(); 1632 } 1633 /* acpi=force to over-ride black-list */ 1634 else if (strcmp(arg, "force") == 0) { 1635 acpi_force = 1; 1636 acpi_ht = 1; 1637 acpi_disabled = 0; 1638 } 1639 /* acpi=strict disables out-of-spec workarounds */ 1640 else if (strcmp(arg, "strict") == 0) { 1641 acpi_strict = 1; 1642 } 1643 /* Limit ACPI just to boot-time to enable HT */ 1644 else if (strcmp(arg, "ht") == 0) { 1645 if (!acpi_force) 1646 disable_acpi(); 1647 acpi_ht = 1; 1648 } 1649 /* acpi=rsdt use RSDT instead of XSDT */ 1650 else if (strcmp(arg, "rsdt") == 0) { 1651 acpi_rsdt_forced = 1; 1652 } 1653 /* "acpi=noirq" disables ACPI interrupt routing */ 1654 else if (strcmp(arg, "noirq") == 0) { 1655 acpi_noirq_set(); 1656 } else { 1657 /* Core will printk when we return error. */ 1658 return -EINVAL; 1659 } 1660 return 0; 1661 } 1662 early_param("acpi", parse_acpi); 1663 1664 /* FIXME: Using pci= for an ACPI parameter is a travesty. */ 1665 static int __init parse_pci(char *arg) 1666 { 1667 if (arg && strcmp(arg, "noacpi") == 0) 1668 acpi_disable_pci(); 1669 return 0; 1670 } 1671 early_param("pci", parse_pci); 1672 1673 int __init acpi_mps_check(void) 1674 { 1675 #if defined(CONFIG_X86_LOCAL_APIC) && !defined(CONFIG_X86_MPPARSE) 1676 /* mptable code is not built-in*/ 1677 if (acpi_disabled || acpi_noirq) { 1678 printk(KERN_WARNING "MPS support code is not built-in.\n" 1679 "Using acpi=off or acpi=noirq or pci=noacpi " 1680 "may have problem\n"); 1681 return 1; 1682 } 1683 #endif 1684 return 0; 1685 } 1686 1687 #ifdef CONFIG_X86_IO_APIC 1688 static int __init parse_acpi_skip_timer_override(char *arg) 1689 { 1690 acpi_skip_timer_override = 1; 1691 return 0; 1692 } 1693 early_param("acpi_skip_timer_override", parse_acpi_skip_timer_override); 1694 1695 static int __init parse_acpi_use_timer_override(char *arg) 1696 { 1697 acpi_use_timer_override = 1; 1698 return 0; 1699 } 1700 early_param("acpi_use_timer_override", parse_acpi_use_timer_override); 1701 #endif /* CONFIG_X86_IO_APIC */ 1702 1703 static int __init setup_acpi_sci(char *s) 1704 { 1705 if (!s) 1706 return -EINVAL; 1707 if (!strcmp(s, "edge")) 1708 acpi_sci_flags = ACPI_MADT_TRIGGER_EDGE | 1709 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK); 1710 else if (!strcmp(s, "level")) 1711 acpi_sci_flags = ACPI_MADT_TRIGGER_LEVEL | 1712 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK); 1713 else if (!strcmp(s, "high")) 1714 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_HIGH | 1715 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK); 1716 else if (!strcmp(s, "low")) 1717 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_LOW | 1718 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK); 1719 else 1720 return -EINVAL; 1721 return 0; 1722 } 1723 early_param("acpi_sci", setup_acpi_sci); 1724 1725 int __acpi_acquire_global_lock(unsigned int *lock) 1726 { 1727 unsigned int old, new, val; 1728 do { 1729 old = *lock; 1730 new = (((old & ~0x3) + 2) + ((old >> 1) & 0x1)); 1731 val = cmpxchg(lock, old, new); 1732 } while (unlikely (val != old)); 1733 return (new < 3) ? -1 : 0; 1734 } 1735 1736 int __acpi_release_global_lock(unsigned int *lock) 1737 { 1738 unsigned int old, new, val; 1739 do { 1740 old = *lock; 1741 new = old & ~0x3; 1742 val = cmpxchg(lock, old, new); 1743 } while (unlikely (val != old)); 1744 return old & 0x1; 1745 } 1746