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 static struct { 837 int gsi_base; 838 int gsi_end; 839 } mp_ioapic_routing[MAX_IO_APICS]; 840 841 int mp_find_ioapic(int gsi) 842 { 843 int i = 0; 844 845 /* Find the IOAPIC that manages this GSI. */ 846 for (i = 0; i < nr_ioapics; i++) { 847 if ((gsi >= mp_ioapic_routing[i].gsi_base) 848 && (gsi <= mp_ioapic_routing[i].gsi_end)) 849 return i; 850 } 851 852 printk(KERN_ERR "ERROR: Unable to locate IOAPIC for GSI %d\n", gsi); 853 return -1; 854 } 855 856 int mp_find_ioapic_pin(int ioapic, int gsi) 857 { 858 if (WARN_ON(ioapic == -1)) 859 return -1; 860 if (WARN_ON(gsi > mp_ioapic_routing[ioapic].gsi_end)) 861 return -1; 862 863 return gsi - mp_ioapic_routing[ioapic].gsi_base; 864 } 865 866 static u8 __init uniq_ioapic_id(u8 id) 867 { 868 #ifdef CONFIG_X86_32 869 if ((boot_cpu_data.x86_vendor == X86_VENDOR_INTEL) && 870 !APIC_XAPIC(apic_version[boot_cpu_physical_apicid])) 871 return io_apic_get_unique_id(nr_ioapics, id); 872 else 873 return id; 874 #else 875 int i; 876 DECLARE_BITMAP(used, 256); 877 bitmap_zero(used, 256); 878 for (i = 0; i < nr_ioapics; i++) { 879 struct mpc_ioapic *ia = &mp_ioapics[i]; 880 __set_bit(ia->apicid, used); 881 } 882 if (!test_bit(id, used)) 883 return id; 884 return find_first_zero_bit(used, 256); 885 #endif 886 } 887 888 static int bad_ioapic(unsigned long address) 889 { 890 if (nr_ioapics >= MAX_IO_APICS) { 891 printk(KERN_ERR "ERROR: Max # of I/O APICs (%d) exceeded " 892 "(found %d)\n", MAX_IO_APICS, nr_ioapics); 893 panic("Recompile kernel with bigger MAX_IO_APICS!\n"); 894 } 895 if (!address) { 896 printk(KERN_ERR "WARNING: Bogus (zero) I/O APIC address" 897 " found in table, skipping!\n"); 898 return 1; 899 } 900 return 0; 901 } 902 903 void __init mp_register_ioapic(int id, u32 address, u32 gsi_base) 904 { 905 int idx = 0; 906 907 if (bad_ioapic(address)) 908 return; 909 910 idx = nr_ioapics; 911 912 mp_ioapics[idx].type = MP_IOAPIC; 913 mp_ioapics[idx].flags = MPC_APIC_USABLE; 914 mp_ioapics[idx].apicaddr = address; 915 916 set_fixmap_nocache(FIX_IO_APIC_BASE_0 + idx, address); 917 mp_ioapics[idx].apicid = uniq_ioapic_id(id); 918 mp_ioapics[idx].apicver = io_apic_get_version(idx); 919 920 /* 921 * Build basic GSI lookup table to facilitate gsi->io_apic lookups 922 * and to prevent reprogramming of IOAPIC pins (PCI GSIs). 923 */ 924 mp_ioapic_routing[idx].gsi_base = gsi_base; 925 mp_ioapic_routing[idx].gsi_end = gsi_base + 926 io_apic_get_redir_entries(idx); 927 928 printk(KERN_INFO "IOAPIC[%d]: apic_id %d, version %d, address 0x%x, " 929 "GSI %d-%d\n", idx, mp_ioapics[idx].apicid, 930 mp_ioapics[idx].apicver, mp_ioapics[idx].apicaddr, 931 mp_ioapic_routing[idx].gsi_base, mp_ioapic_routing[idx].gsi_end); 932 933 nr_ioapics++; 934 } 935 936 int __init acpi_probe_gsi(void) 937 { 938 int idx; 939 int gsi; 940 int max_gsi = 0; 941 942 if (acpi_disabled) 943 return 0; 944 945 if (!acpi_ioapic) 946 return 0; 947 948 max_gsi = 0; 949 for (idx = 0; idx < nr_ioapics; idx++) { 950 gsi = mp_ioapic_routing[idx].gsi_end; 951 952 if (gsi > max_gsi) 953 max_gsi = gsi; 954 } 955 956 return max_gsi + 1; 957 } 958 959 static void assign_to_mp_irq(struct mpc_intsrc *m, 960 struct mpc_intsrc *mp_irq) 961 { 962 memcpy(mp_irq, m, sizeof(struct mpc_intsrc)); 963 } 964 965 static int mp_irq_cmp(struct mpc_intsrc *mp_irq, 966 struct mpc_intsrc *m) 967 { 968 return memcmp(mp_irq, m, sizeof(struct mpc_intsrc)); 969 } 970 971 static void save_mp_irq(struct mpc_intsrc *m) 972 { 973 int i; 974 975 for (i = 0; i < mp_irq_entries; i++) { 976 if (!mp_irq_cmp(&mp_irqs[i], m)) 977 return; 978 } 979 980 assign_to_mp_irq(m, &mp_irqs[mp_irq_entries]); 981 if (++mp_irq_entries == MAX_IRQ_SOURCES) 982 panic("Max # of irq sources exceeded!!\n"); 983 } 984 985 void __init mp_override_legacy_irq(u8 bus_irq, u8 polarity, u8 trigger, u32 gsi) 986 { 987 int ioapic; 988 int pin; 989 struct mpc_intsrc mp_irq; 990 991 /* 992 * Convert 'gsi' to 'ioapic.pin'. 993 */ 994 ioapic = mp_find_ioapic(gsi); 995 if (ioapic < 0) 996 return; 997 pin = mp_find_ioapic_pin(ioapic, gsi); 998 999 /* 1000 * TBD: This check is for faulty timer entries, where the override 1001 * erroneously sets the trigger to level, resulting in a HUGE 1002 * increase of timer interrupts! 1003 */ 1004 if ((bus_irq == 0) && (trigger == 3)) 1005 trigger = 1; 1006 1007 mp_irq.type = MP_INTSRC; 1008 mp_irq.irqtype = mp_INT; 1009 mp_irq.irqflag = (trigger << 2) | polarity; 1010 mp_irq.srcbus = MP_ISA_BUS; 1011 mp_irq.srcbusirq = bus_irq; /* IRQ */ 1012 mp_irq.dstapic = mp_ioapics[ioapic].apicid; /* APIC ID */ 1013 mp_irq.dstirq = pin; /* INTIN# */ 1014 1015 save_mp_irq(&mp_irq); 1016 } 1017 1018 void __init mp_config_acpi_legacy_irqs(void) 1019 { 1020 int i; 1021 int ioapic; 1022 unsigned int dstapic; 1023 struct mpc_intsrc mp_irq; 1024 1025 #if defined (CONFIG_MCA) || defined (CONFIG_EISA) 1026 /* 1027 * Fabricate the legacy ISA bus (bus #31). 1028 */ 1029 mp_bus_id_to_type[MP_ISA_BUS] = MP_BUS_ISA; 1030 #endif 1031 set_bit(MP_ISA_BUS, mp_bus_not_pci); 1032 pr_debug("Bus #%d is ISA\n", MP_ISA_BUS); 1033 1034 #ifdef CONFIG_X86_ES7000 1035 /* 1036 * Older generations of ES7000 have no legacy identity mappings 1037 */ 1038 if (es7000_plat == 1) 1039 return; 1040 #endif 1041 1042 /* 1043 * Locate the IOAPIC that manages the ISA IRQs (0-15). 1044 */ 1045 ioapic = mp_find_ioapic(0); 1046 if (ioapic < 0) 1047 return; 1048 dstapic = mp_ioapics[ioapic].apicid; 1049 1050 /* 1051 * Use the default configuration for the IRQs 0-15. Unless 1052 * overridden by (MADT) interrupt source override entries. 1053 */ 1054 for (i = 0; i < 16; i++) { 1055 int idx; 1056 1057 for (idx = 0; idx < mp_irq_entries; idx++) { 1058 struct mpc_intsrc *irq = mp_irqs + idx; 1059 1060 /* Do we already have a mapping for this ISA IRQ? */ 1061 if (irq->srcbus == MP_ISA_BUS && irq->srcbusirq == i) 1062 break; 1063 1064 /* Do we already have a mapping for this IOAPIC pin */ 1065 if (irq->dstapic == dstapic && irq->dstirq == i) 1066 break; 1067 } 1068 1069 if (idx != mp_irq_entries) { 1070 printk(KERN_DEBUG "ACPI: IRQ%d used by override.\n", i); 1071 continue; /* IRQ already used */ 1072 } 1073 1074 mp_irq.type = MP_INTSRC; 1075 mp_irq.irqflag = 0; /* Conforming */ 1076 mp_irq.srcbus = MP_ISA_BUS; 1077 mp_irq.dstapic = dstapic; 1078 mp_irq.irqtype = mp_INT; 1079 mp_irq.srcbusirq = i; /* Identity mapped */ 1080 mp_irq.dstirq = i; 1081 1082 save_mp_irq(&mp_irq); 1083 } 1084 } 1085 1086 static int mp_config_acpi_gsi(struct device *dev, u32 gsi, int trigger, 1087 int polarity) 1088 { 1089 #ifdef CONFIG_X86_MPPARSE 1090 struct mpc_intsrc mp_irq; 1091 struct pci_dev *pdev; 1092 unsigned char number; 1093 unsigned int devfn; 1094 int ioapic; 1095 u8 pin; 1096 1097 if (!acpi_ioapic) 1098 return 0; 1099 if (!dev) 1100 return 0; 1101 if (dev->bus != &pci_bus_type) 1102 return 0; 1103 1104 pdev = to_pci_dev(dev); 1105 number = pdev->bus->number; 1106 devfn = pdev->devfn; 1107 pin = pdev->pin; 1108 /* print the entry should happen on mptable identically */ 1109 mp_irq.type = MP_INTSRC; 1110 mp_irq.irqtype = mp_INT; 1111 mp_irq.irqflag = (trigger == ACPI_EDGE_SENSITIVE ? 4 : 0x0c) | 1112 (polarity == ACPI_ACTIVE_HIGH ? 1 : 3); 1113 mp_irq.srcbus = number; 1114 mp_irq.srcbusirq = (((devfn >> 3) & 0x1f) << 2) | ((pin - 1) & 3); 1115 ioapic = mp_find_ioapic(gsi); 1116 mp_irq.dstapic = mp_ioapics[ioapic].apicid; 1117 mp_irq.dstirq = mp_find_ioapic_pin(ioapic, gsi); 1118 1119 save_mp_irq(&mp_irq); 1120 #endif 1121 return 0; 1122 } 1123 1124 int mp_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity) 1125 { 1126 int ioapic; 1127 int ioapic_pin; 1128 struct io_apic_irq_attr irq_attr; 1129 1130 if (acpi_irq_model != ACPI_IRQ_MODEL_IOAPIC) 1131 return gsi; 1132 1133 /* Don't set up the ACPI SCI because it's already set up */ 1134 if (acpi_gbl_FADT.sci_interrupt == gsi) 1135 return gsi; 1136 1137 ioapic = mp_find_ioapic(gsi); 1138 if (ioapic < 0) { 1139 printk(KERN_WARNING "No IOAPIC for GSI %u\n", gsi); 1140 return gsi; 1141 } 1142 1143 ioapic_pin = mp_find_ioapic_pin(ioapic, gsi); 1144 1145 #ifdef CONFIG_X86_32 1146 if (ioapic_renumber_irq) 1147 gsi = ioapic_renumber_irq(ioapic, gsi); 1148 #endif 1149 1150 if (ioapic_pin > MP_MAX_IOAPIC_PIN) { 1151 printk(KERN_ERR "Invalid reference to IOAPIC pin " 1152 "%d-%d\n", mp_ioapics[ioapic].apicid, 1153 ioapic_pin); 1154 return gsi; 1155 } 1156 1157 if (enable_update_mptable) 1158 mp_config_acpi_gsi(dev, gsi, trigger, polarity); 1159 1160 set_io_apic_irq_attr(&irq_attr, ioapic, ioapic_pin, 1161 trigger == ACPI_EDGE_SENSITIVE ? 0 : 1, 1162 polarity == ACPI_ACTIVE_HIGH ? 0 : 1); 1163 io_apic_set_pci_routing(dev, gsi, &irq_attr); 1164 1165 return gsi; 1166 } 1167 1168 /* 1169 * Parse IOAPIC related entries in MADT 1170 * returns 0 on success, < 0 on error 1171 */ 1172 static int __init acpi_parse_madt_ioapic_entries(void) 1173 { 1174 int count; 1175 1176 /* 1177 * ACPI interpreter is required to complete interrupt setup, 1178 * so if it is off, don't enumerate the io-apics with ACPI. 1179 * If MPS is present, it will handle them, 1180 * otherwise the system will stay in PIC mode 1181 */ 1182 if (acpi_disabled || acpi_noirq) { 1183 return -ENODEV; 1184 } 1185 1186 if (!cpu_has_apic) 1187 return -ENODEV; 1188 1189 /* 1190 * if "noapic" boot option, don't look for IO-APICs 1191 */ 1192 if (skip_ioapic_setup) { 1193 printk(KERN_INFO PREFIX "Skipping IOAPIC probe " 1194 "due to 'noapic' option.\n"); 1195 return -ENODEV; 1196 } 1197 1198 count = 1199 acpi_table_parse_madt(ACPI_MADT_TYPE_IO_APIC, acpi_parse_ioapic, 1200 MAX_IO_APICS); 1201 if (!count) { 1202 printk(KERN_ERR PREFIX "No IOAPIC entries present\n"); 1203 return -ENODEV; 1204 } else if (count < 0) { 1205 printk(KERN_ERR PREFIX "Error parsing IOAPIC entry\n"); 1206 return count; 1207 } 1208 1209 count = 1210 acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE, acpi_parse_int_src_ovr, 1211 nr_irqs); 1212 if (count < 0) { 1213 printk(KERN_ERR PREFIX 1214 "Error parsing interrupt source overrides entry\n"); 1215 /* TBD: Cleanup to allow fallback to MPS */ 1216 return count; 1217 } 1218 1219 /* 1220 * If BIOS did not supply an INT_SRC_OVR for the SCI 1221 * pretend we got one so we can set the SCI flags. 1222 */ 1223 if (!acpi_sci_override_gsi) 1224 acpi_sci_ioapic_setup(acpi_gbl_FADT.sci_interrupt, 0, 0); 1225 1226 /* Fill in identity legacy mapings where no override */ 1227 mp_config_acpi_legacy_irqs(); 1228 1229 count = 1230 acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE, acpi_parse_nmi_src, 1231 nr_irqs); 1232 if (count < 0) { 1233 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n"); 1234 /* TBD: Cleanup to allow fallback to MPS */ 1235 return count; 1236 } 1237 1238 return 0; 1239 } 1240 #else 1241 static inline int acpi_parse_madt_ioapic_entries(void) 1242 { 1243 return -1; 1244 } 1245 #endif /* !CONFIG_X86_IO_APIC */ 1246 1247 static void __init early_acpi_process_madt(void) 1248 { 1249 #ifdef CONFIG_X86_LOCAL_APIC 1250 int error; 1251 1252 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) { 1253 1254 /* 1255 * Parse MADT LAPIC entries 1256 */ 1257 error = early_acpi_parse_madt_lapic_addr_ovr(); 1258 if (!error) { 1259 acpi_lapic = 1; 1260 smp_found_config = 1; 1261 } 1262 if (error == -EINVAL) { 1263 /* 1264 * Dell Precision Workstation 410, 610 come here. 1265 */ 1266 printk(KERN_ERR PREFIX 1267 "Invalid BIOS MADT, disabling ACPI\n"); 1268 disable_acpi(); 1269 } 1270 } 1271 #endif 1272 } 1273 1274 static void __init acpi_process_madt(void) 1275 { 1276 #ifdef CONFIG_X86_LOCAL_APIC 1277 int error; 1278 1279 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) { 1280 1281 /* 1282 * Parse MADT LAPIC entries 1283 */ 1284 error = acpi_parse_madt_lapic_entries(); 1285 if (!error) { 1286 acpi_lapic = 1; 1287 1288 #ifdef CONFIG_X86_BIGSMP 1289 generic_bigsmp_probe(); 1290 #endif 1291 /* 1292 * Parse MADT IO-APIC entries 1293 */ 1294 error = acpi_parse_madt_ioapic_entries(); 1295 if (!error) { 1296 acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC; 1297 acpi_ioapic = 1; 1298 1299 smp_found_config = 1; 1300 if (apic->setup_apic_routing) 1301 apic->setup_apic_routing(); 1302 } 1303 } 1304 if (error == -EINVAL) { 1305 /* 1306 * Dell Precision Workstation 410, 610 come here. 1307 */ 1308 printk(KERN_ERR PREFIX 1309 "Invalid BIOS MADT, disabling ACPI\n"); 1310 disable_acpi(); 1311 } 1312 } else { 1313 /* 1314 * ACPI found no MADT, and so ACPI wants UP PIC mode. 1315 * In the event an MPS table was found, forget it. 1316 * Boot with "acpi=off" to use MPS on such a system. 1317 */ 1318 if (smp_found_config) { 1319 printk(KERN_WARNING PREFIX 1320 "No APIC-table, disabling MPS\n"); 1321 smp_found_config = 0; 1322 } 1323 } 1324 1325 /* 1326 * ACPI supports both logical (e.g. Hyper-Threading) and physical 1327 * processors, where MPS only supports physical. 1328 */ 1329 if (acpi_lapic && acpi_ioapic) 1330 printk(KERN_INFO "Using ACPI (MADT) for SMP configuration " 1331 "information\n"); 1332 else if (acpi_lapic) 1333 printk(KERN_INFO "Using ACPI for processor (LAPIC) " 1334 "configuration information\n"); 1335 #endif 1336 return; 1337 } 1338 1339 static int __init disable_acpi_irq(const struct dmi_system_id *d) 1340 { 1341 if (!acpi_force) { 1342 printk(KERN_NOTICE "%s detected: force use of acpi=noirq\n", 1343 d->ident); 1344 acpi_noirq_set(); 1345 } 1346 return 0; 1347 } 1348 1349 static int __init disable_acpi_pci(const struct dmi_system_id *d) 1350 { 1351 if (!acpi_force) { 1352 printk(KERN_NOTICE "%s detected: force use of pci=noacpi\n", 1353 d->ident); 1354 acpi_disable_pci(); 1355 } 1356 return 0; 1357 } 1358 1359 static int __init dmi_disable_acpi(const struct dmi_system_id *d) 1360 { 1361 if (!acpi_force) { 1362 printk(KERN_NOTICE "%s detected: acpi off\n", d->ident); 1363 disable_acpi(); 1364 } else { 1365 printk(KERN_NOTICE 1366 "Warning: DMI blacklist says broken, but acpi forced\n"); 1367 } 1368 return 0; 1369 } 1370 1371 /* 1372 * Limit ACPI to CPU enumeration for HT 1373 */ 1374 static int __init force_acpi_ht(const struct dmi_system_id *d) 1375 { 1376 if (!acpi_force) { 1377 printk(KERN_NOTICE "%s detected: force use of acpi=ht\n", 1378 d->ident); 1379 disable_acpi(); 1380 acpi_ht = 1; 1381 } else { 1382 printk(KERN_NOTICE 1383 "Warning: acpi=force overrules DMI blacklist: acpi=ht\n"); 1384 } 1385 return 0; 1386 } 1387 1388 /* 1389 * Force ignoring BIOS IRQ0 pin2 override 1390 */ 1391 static int __init dmi_ignore_irq0_timer_override(const struct dmi_system_id *d) 1392 { 1393 /* 1394 * The ati_ixp4x0_rev() early PCI quirk should have set 1395 * the acpi_skip_timer_override flag already: 1396 */ 1397 if (!acpi_skip_timer_override) { 1398 WARN(1, KERN_ERR "ati_ixp4x0 quirk not complete.\n"); 1399 pr_notice("%s detected: Ignoring BIOS IRQ0 pin2 override\n", 1400 d->ident); 1401 acpi_skip_timer_override = 1; 1402 } 1403 return 0; 1404 } 1405 1406 /* 1407 * If your system is blacklisted here, but you find that acpi=force 1408 * works for you, please contact linux-acpi@vger.kernel.org 1409 */ 1410 static struct dmi_system_id __initdata acpi_dmi_table[] = { 1411 /* 1412 * Boxes that need ACPI disabled 1413 */ 1414 { 1415 .callback = dmi_disable_acpi, 1416 .ident = "IBM Thinkpad", 1417 .matches = { 1418 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), 1419 DMI_MATCH(DMI_BOARD_NAME, "2629H1G"), 1420 }, 1421 }, 1422 1423 /* 1424 * Boxes that need acpi=ht 1425 */ 1426 { 1427 .callback = force_acpi_ht, 1428 .ident = "FSC Primergy T850", 1429 .matches = { 1430 DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"), 1431 DMI_MATCH(DMI_PRODUCT_NAME, "PRIMERGY T850"), 1432 }, 1433 }, 1434 { 1435 .callback = force_acpi_ht, 1436 .ident = "HP VISUALIZE NT Workstation", 1437 .matches = { 1438 DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"), 1439 DMI_MATCH(DMI_PRODUCT_NAME, "HP VISUALIZE NT Workstation"), 1440 }, 1441 }, 1442 { 1443 .callback = force_acpi_ht, 1444 .ident = "Compaq Workstation W8000", 1445 .matches = { 1446 DMI_MATCH(DMI_SYS_VENDOR, "Compaq"), 1447 DMI_MATCH(DMI_PRODUCT_NAME, "Workstation W8000"), 1448 }, 1449 }, 1450 { 1451 .callback = force_acpi_ht, 1452 .ident = "ASUS P2B-DS", 1453 .matches = { 1454 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."), 1455 DMI_MATCH(DMI_BOARD_NAME, "P2B-DS"), 1456 }, 1457 }, 1458 { 1459 .callback = force_acpi_ht, 1460 .ident = "ASUS CUR-DLS", 1461 .matches = { 1462 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."), 1463 DMI_MATCH(DMI_BOARD_NAME, "CUR-DLS"), 1464 }, 1465 }, 1466 { 1467 .callback = force_acpi_ht, 1468 .ident = "ABIT i440BX-W83977", 1469 .matches = { 1470 DMI_MATCH(DMI_BOARD_VENDOR, "ABIT <http://www.abit.com>"), 1471 DMI_MATCH(DMI_BOARD_NAME, "i440BX-W83977 (BP6)"), 1472 }, 1473 }, 1474 { 1475 .callback = force_acpi_ht, 1476 .ident = "IBM Bladecenter", 1477 .matches = { 1478 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), 1479 DMI_MATCH(DMI_BOARD_NAME, "IBM eServer BladeCenter HS20"), 1480 }, 1481 }, 1482 { 1483 .callback = force_acpi_ht, 1484 .ident = "IBM eServer xSeries 360", 1485 .matches = { 1486 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), 1487 DMI_MATCH(DMI_BOARD_NAME, "eServer xSeries 360"), 1488 }, 1489 }, 1490 { 1491 .callback = force_acpi_ht, 1492 .ident = "IBM eserver xSeries 330", 1493 .matches = { 1494 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), 1495 DMI_MATCH(DMI_BOARD_NAME, "eserver xSeries 330"), 1496 }, 1497 }, 1498 { 1499 .callback = force_acpi_ht, 1500 .ident = "IBM eserver xSeries 440", 1501 .matches = { 1502 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), 1503 DMI_MATCH(DMI_PRODUCT_NAME, "eserver xSeries 440"), 1504 }, 1505 }, 1506 1507 /* 1508 * Boxes that need ACPI PCI IRQ routing disabled 1509 */ 1510 { 1511 .callback = disable_acpi_irq, 1512 .ident = "ASUS A7V", 1513 .matches = { 1514 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC"), 1515 DMI_MATCH(DMI_BOARD_NAME, "<A7V>"), 1516 /* newer BIOS, Revision 1011, does work */ 1517 DMI_MATCH(DMI_BIOS_VERSION, 1518 "ASUS A7V ACPI BIOS Revision 1007"), 1519 }, 1520 }, 1521 { 1522 /* 1523 * Latest BIOS for IBM 600E (1.16) has bad pcinum 1524 * for LPC bridge, which is needed for the PCI 1525 * interrupt links to work. DSDT fix is in bug 5966. 1526 * 2645, 2646 model numbers are shared with 600/600E/600X 1527 */ 1528 .callback = disable_acpi_irq, 1529 .ident = "IBM Thinkpad 600 Series 2645", 1530 .matches = { 1531 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), 1532 DMI_MATCH(DMI_BOARD_NAME, "2645"), 1533 }, 1534 }, 1535 { 1536 .callback = disable_acpi_irq, 1537 .ident = "IBM Thinkpad 600 Series 2646", 1538 .matches = { 1539 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), 1540 DMI_MATCH(DMI_BOARD_NAME, "2646"), 1541 }, 1542 }, 1543 /* 1544 * Boxes that need ACPI PCI IRQ routing and PCI scan disabled 1545 */ 1546 { /* _BBN 0 bug */ 1547 .callback = disable_acpi_pci, 1548 .ident = "ASUS PR-DLS", 1549 .matches = { 1550 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."), 1551 DMI_MATCH(DMI_BOARD_NAME, "PR-DLS"), 1552 DMI_MATCH(DMI_BIOS_VERSION, 1553 "ASUS PR-DLS ACPI BIOS Revision 1010"), 1554 DMI_MATCH(DMI_BIOS_DATE, "03/21/2003") 1555 }, 1556 }, 1557 { 1558 .callback = disable_acpi_pci, 1559 .ident = "Acer TravelMate 36x Laptop", 1560 .matches = { 1561 DMI_MATCH(DMI_SYS_VENDOR, "Acer"), 1562 DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"), 1563 }, 1564 }, 1565 {} 1566 }; 1567 1568 /* second table for DMI checks that should run after early-quirks */ 1569 static struct dmi_system_id __initdata acpi_dmi_table_late[] = { 1570 /* 1571 * HP laptops which use a DSDT reporting as HP/SB400/10000, 1572 * which includes some code which overrides all temperature 1573 * trip points to 16C if the INTIN2 input of the I/O APIC 1574 * is enabled. This input is incorrectly designated the 1575 * ISA IRQ 0 via an interrupt source override even though 1576 * it is wired to the output of the master 8259A and INTIN0 1577 * is not connected at all. Force ignoring BIOS IRQ0 pin2 1578 * override in that cases. 1579 */ 1580 { 1581 .callback = dmi_ignore_irq0_timer_override, 1582 .ident = "HP nx6115 laptop", 1583 .matches = { 1584 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 1585 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6115"), 1586 }, 1587 }, 1588 { 1589 .callback = dmi_ignore_irq0_timer_override, 1590 .ident = "HP NX6125 laptop", 1591 .matches = { 1592 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 1593 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6125"), 1594 }, 1595 }, 1596 { 1597 .callback = dmi_ignore_irq0_timer_override, 1598 .ident = "HP NX6325 laptop", 1599 .matches = { 1600 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 1601 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6325"), 1602 }, 1603 }, 1604 { 1605 .callback = dmi_ignore_irq0_timer_override, 1606 .ident = "HP 6715b laptop", 1607 .matches = { 1608 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 1609 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq 6715b"), 1610 }, 1611 }, 1612 {} 1613 }; 1614 1615 /* 1616 * acpi_boot_table_init() and acpi_boot_init() 1617 * called from setup_arch(), always. 1618 * 1. checksums all tables 1619 * 2. enumerates lapics 1620 * 3. enumerates io-apics 1621 * 1622 * acpi_table_init() is separate to allow reading SRAT without 1623 * other side effects. 1624 * 1625 * side effects of acpi_boot_init: 1626 * acpi_lapic = 1 if LAPIC found 1627 * acpi_ioapic = 1 if IOAPIC found 1628 * if (acpi_lapic && acpi_ioapic) smp_found_config = 1; 1629 * if acpi_blacklisted() acpi_disabled = 1; 1630 * acpi_irq_model=... 1631 * ... 1632 * 1633 * return value: (currently ignored) 1634 * 0: success 1635 * !0: failure 1636 */ 1637 1638 int __init acpi_boot_table_init(void) 1639 { 1640 int error; 1641 1642 dmi_check_system(acpi_dmi_table); 1643 1644 /* 1645 * If acpi_disabled, bail out 1646 * One exception: acpi=ht continues far enough to enumerate LAPICs 1647 */ 1648 if (acpi_disabled && !acpi_ht) 1649 return 1; 1650 1651 /* 1652 * Initialize the ACPI boot-time table parser. 1653 */ 1654 error = acpi_table_init(); 1655 if (error) { 1656 disable_acpi(); 1657 return error; 1658 } 1659 1660 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf); 1661 1662 /* 1663 * blacklist may disable ACPI entirely 1664 */ 1665 error = acpi_blacklisted(); 1666 if (error) { 1667 if (acpi_force) { 1668 printk(KERN_WARNING PREFIX "acpi=force override\n"); 1669 } else { 1670 printk(KERN_WARNING PREFIX "Disabling ACPI support\n"); 1671 disable_acpi(); 1672 return error; 1673 } 1674 } 1675 1676 return 0; 1677 } 1678 1679 int __init early_acpi_boot_init(void) 1680 { 1681 /* 1682 * If acpi_disabled, bail out 1683 * One exception: acpi=ht continues far enough to enumerate LAPICs 1684 */ 1685 if (acpi_disabled && !acpi_ht) 1686 return 1; 1687 1688 /* 1689 * Process the Multiple APIC Description Table (MADT), if present 1690 */ 1691 early_acpi_process_madt(); 1692 1693 return 0; 1694 } 1695 1696 int __init acpi_boot_init(void) 1697 { 1698 /* those are executed after early-quirks are executed */ 1699 dmi_check_system(acpi_dmi_table_late); 1700 1701 /* 1702 * If acpi_disabled, bail out 1703 * One exception: acpi=ht continues far enough to enumerate LAPICs 1704 */ 1705 if (acpi_disabled && !acpi_ht) 1706 return 1; 1707 1708 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf); 1709 1710 /* 1711 * set sci_int and PM timer address 1712 */ 1713 acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt); 1714 1715 /* 1716 * Process the Multiple APIC Description Table (MADT), if present 1717 */ 1718 acpi_process_madt(); 1719 1720 acpi_table_parse(ACPI_SIG_HPET, acpi_parse_hpet); 1721 1722 return 0; 1723 } 1724 1725 static int __init parse_acpi(char *arg) 1726 { 1727 if (!arg) 1728 return -EINVAL; 1729 1730 /* "acpi=off" disables both ACPI table parsing and interpreter */ 1731 if (strcmp(arg, "off") == 0) { 1732 disable_acpi(); 1733 } 1734 /* acpi=force to over-ride black-list */ 1735 else if (strcmp(arg, "force") == 0) { 1736 acpi_force = 1; 1737 acpi_ht = 1; 1738 acpi_disabled = 0; 1739 } 1740 /* acpi=strict disables out-of-spec workarounds */ 1741 else if (strcmp(arg, "strict") == 0) { 1742 acpi_strict = 1; 1743 } 1744 /* Limit ACPI just to boot-time to enable HT */ 1745 else if (strcmp(arg, "ht") == 0) { 1746 if (!acpi_force) 1747 disable_acpi(); 1748 acpi_ht = 1; 1749 } 1750 /* acpi=rsdt use RSDT instead of XSDT */ 1751 else if (strcmp(arg, "rsdt") == 0) { 1752 acpi_rsdt_forced = 1; 1753 } 1754 /* "acpi=noirq" disables ACPI interrupt routing */ 1755 else if (strcmp(arg, "noirq") == 0) { 1756 acpi_noirq_set(); 1757 } else { 1758 /* Core will printk when we return error. */ 1759 return -EINVAL; 1760 } 1761 return 0; 1762 } 1763 early_param("acpi", parse_acpi); 1764 1765 /* FIXME: Using pci= for an ACPI parameter is a travesty. */ 1766 static int __init parse_pci(char *arg) 1767 { 1768 if (arg && strcmp(arg, "noacpi") == 0) 1769 acpi_disable_pci(); 1770 return 0; 1771 } 1772 early_param("pci", parse_pci); 1773 1774 int __init acpi_mps_check(void) 1775 { 1776 #if defined(CONFIG_X86_LOCAL_APIC) && !defined(CONFIG_X86_MPPARSE) 1777 /* mptable code is not built-in*/ 1778 if (acpi_disabled || acpi_noirq) { 1779 printk(KERN_WARNING "MPS support code is not built-in.\n" 1780 "Using acpi=off or acpi=noirq or pci=noacpi " 1781 "may have problem\n"); 1782 return 1; 1783 } 1784 #endif 1785 return 0; 1786 } 1787 1788 #ifdef CONFIG_X86_IO_APIC 1789 static int __init parse_acpi_skip_timer_override(char *arg) 1790 { 1791 acpi_skip_timer_override = 1; 1792 return 0; 1793 } 1794 early_param("acpi_skip_timer_override", parse_acpi_skip_timer_override); 1795 1796 static int __init parse_acpi_use_timer_override(char *arg) 1797 { 1798 acpi_use_timer_override = 1; 1799 return 0; 1800 } 1801 early_param("acpi_use_timer_override", parse_acpi_use_timer_override); 1802 #endif /* CONFIG_X86_IO_APIC */ 1803 1804 static int __init setup_acpi_sci(char *s) 1805 { 1806 if (!s) 1807 return -EINVAL; 1808 if (!strcmp(s, "edge")) 1809 acpi_sci_flags = ACPI_MADT_TRIGGER_EDGE | 1810 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK); 1811 else if (!strcmp(s, "level")) 1812 acpi_sci_flags = ACPI_MADT_TRIGGER_LEVEL | 1813 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK); 1814 else if (!strcmp(s, "high")) 1815 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_HIGH | 1816 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK); 1817 else if (!strcmp(s, "low")) 1818 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_LOW | 1819 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK); 1820 else 1821 return -EINVAL; 1822 return 0; 1823 } 1824 early_param("acpi_sci", setup_acpi_sci); 1825 1826 int __acpi_acquire_global_lock(unsigned int *lock) 1827 { 1828 unsigned int old, new, val; 1829 do { 1830 old = *lock; 1831 new = (((old & ~0x3) + 2) + ((old >> 1) & 0x1)); 1832 val = cmpxchg(lock, old, new); 1833 } while (unlikely (val != old)); 1834 return (new < 3) ? -1 : 0; 1835 } 1836 1837 int __acpi_release_global_lock(unsigned int *lock) 1838 { 1839 unsigned int old, new, val; 1840 do { 1841 old = *lock; 1842 new = old & ~0x3; 1843 val = cmpxchg(lock, old, new); 1844 } while (unlikely (val != old)); 1845 return old & 0x1; 1846 } 1847