1 /* 2 * boot.c - Architecture-Specific Low-Level ACPI Boot Support 3 * 4 * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com> 5 * Copyright (C) 2001 Jun Nakajima <jun.nakajima@intel.com> 6 * 7 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 8 * 9 * This program is free software; you can redistribute it and/or modify 10 * it under the terms of the GNU General Public License as published by 11 * the Free Software Foundation; either version 2 of the License, or 12 * (at your option) any later version. 13 * 14 * This program is distributed in the hope that it will be useful, 15 * but WITHOUT ANY WARRANTY; without even the implied warranty of 16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 17 * GNU General Public License for more details. 18 * 19 * You should have received a copy of the GNU General Public License 20 * along with this program; if not, write to the Free Software 21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 22 * 23 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 24 */ 25 26 #include <linux/init.h> 27 #include <linux/acpi.h> 28 #include <linux/acpi_pmtmr.h> 29 #include <linux/efi.h> 30 #include <linux/cpumask.h> 31 #include <linux/module.h> 32 #include <linux/dmi.h> 33 #include <linux/irq.h> 34 #include <linux/bootmem.h> 35 #include <linux/ioport.h> 36 37 #include <asm/pgtable.h> 38 #include <asm/io_apic.h> 39 #include <asm/apic.h> 40 #include <asm/io.h> 41 #include <asm/mpspec.h> 42 43 static int __initdata acpi_force = 0; 44 45 #ifdef CONFIG_ACPI 46 int acpi_disabled = 0; 47 #else 48 int acpi_disabled = 1; 49 #endif 50 EXPORT_SYMBOL(acpi_disabled); 51 52 #ifdef CONFIG_X86_64 53 54 #include <asm/proto.h> 55 56 static inline int acpi_madt_oem_check(char *oem_id, char *oem_table_id) { return 0; } 57 58 59 #else /* X86 */ 60 61 #ifdef CONFIG_X86_LOCAL_APIC 62 #include <mach_apic.h> 63 #include <mach_mpparse.h> 64 #endif /* CONFIG_X86_LOCAL_APIC */ 65 66 #endif /* X86 */ 67 68 #define BAD_MADT_ENTRY(entry, end) ( \ 69 (!entry) || (unsigned long)entry + sizeof(*entry) > end || \ 70 ((struct acpi_subtable_header *)entry)->length < sizeof(*entry)) 71 72 #define PREFIX "ACPI: " 73 74 int acpi_noirq; /* skip ACPI IRQ initialization */ 75 int acpi_pci_disabled __initdata; /* skip ACPI PCI scan and IRQ initialization */ 76 int acpi_ht __initdata = 1; /* enable HT */ 77 78 int acpi_lapic; 79 int acpi_ioapic; 80 int acpi_strict; 81 EXPORT_SYMBOL(acpi_strict); 82 83 u8 acpi_sci_flags __initdata; 84 int acpi_sci_override_gsi __initdata; 85 int acpi_skip_timer_override __initdata; 86 int acpi_use_timer_override __initdata; 87 88 #ifdef CONFIG_X86_LOCAL_APIC 89 static u64 acpi_lapic_addr __initdata = APIC_DEFAULT_PHYS_BASE; 90 #endif 91 92 #ifndef __HAVE_ARCH_CMPXCHG 93 #warning ACPI uses CMPXCHG, i486 and later hardware 94 #endif 95 96 /* -------------------------------------------------------------------------- 97 Boot-time Configuration 98 -------------------------------------------------------------------------- */ 99 100 /* 101 * The default interrupt routing model is PIC (8259). This gets 102 * overridden if IOAPICs are enumerated (below). 103 */ 104 enum acpi_irq_model_id acpi_irq_model = ACPI_IRQ_MODEL_PIC; 105 106 #ifdef CONFIG_X86_64 107 108 /* rely on all ACPI tables being in the direct mapping */ 109 char *__acpi_map_table(unsigned long phys_addr, unsigned long size) 110 { 111 if (!phys_addr || !size) 112 return NULL; 113 114 if (phys_addr+size <= (end_pfn_map << PAGE_SHIFT) + PAGE_SIZE) 115 return __va(phys_addr); 116 117 return NULL; 118 } 119 120 #else 121 122 /* 123 * Temporarily use the virtual area starting from FIX_IO_APIC_BASE_END, 124 * to map the target physical address. The problem is that set_fixmap() 125 * provides a single page, and it is possible that the page is not 126 * sufficient. 127 * By using this area, we can map up to MAX_IO_APICS pages temporarily, 128 * i.e. until the next __va_range() call. 129 * 130 * Important Safety Note: The fixed I/O APIC page numbers are *subtracted* 131 * from the fixed base. That's why we start at FIX_IO_APIC_BASE_END and 132 * count idx down while incrementing the phys address. 133 */ 134 char *__acpi_map_table(unsigned long phys, unsigned long size) 135 { 136 unsigned long base, offset, mapped_size; 137 int idx; 138 139 if (phys + size < 8 * 1024 * 1024) 140 return __va(phys); 141 142 offset = phys & (PAGE_SIZE - 1); 143 mapped_size = PAGE_SIZE - offset; 144 set_fixmap(FIX_ACPI_END, phys); 145 base = fix_to_virt(FIX_ACPI_END); 146 147 /* 148 * Most cases can be covered by the below. 149 */ 150 idx = FIX_ACPI_END; 151 while (mapped_size < size) { 152 if (--idx < FIX_ACPI_BEGIN) 153 return NULL; /* cannot handle this */ 154 phys += PAGE_SIZE; 155 set_fixmap(idx, phys); 156 mapped_size += PAGE_SIZE; 157 } 158 159 return ((unsigned char *)base + offset); 160 } 161 #endif 162 163 #ifdef CONFIG_PCI_MMCONFIG 164 /* The physical address of the MMCONFIG aperture. Set from ACPI tables. */ 165 struct acpi_mcfg_allocation *pci_mmcfg_config; 166 int pci_mmcfg_config_num; 167 168 int __init acpi_parse_mcfg(struct acpi_table_header *header) 169 { 170 struct acpi_table_mcfg *mcfg; 171 unsigned long i; 172 int config_size; 173 174 if (!header) 175 return -EINVAL; 176 177 mcfg = (struct acpi_table_mcfg *)header; 178 179 /* how many config structures do we have */ 180 pci_mmcfg_config_num = 0; 181 i = header->length - sizeof(struct acpi_table_mcfg); 182 while (i >= sizeof(struct acpi_mcfg_allocation)) { 183 ++pci_mmcfg_config_num; 184 i -= sizeof(struct acpi_mcfg_allocation); 185 }; 186 if (pci_mmcfg_config_num == 0) { 187 printk(KERN_ERR PREFIX "MMCONFIG has no entries\n"); 188 return -ENODEV; 189 } 190 191 config_size = pci_mmcfg_config_num * sizeof(*pci_mmcfg_config); 192 pci_mmcfg_config = kmalloc(config_size, GFP_KERNEL); 193 if (!pci_mmcfg_config) { 194 printk(KERN_WARNING PREFIX 195 "No memory for MCFG config tables\n"); 196 return -ENOMEM; 197 } 198 199 memcpy(pci_mmcfg_config, &mcfg[1], config_size); 200 for (i = 0; i < pci_mmcfg_config_num; ++i) { 201 if (pci_mmcfg_config[i].address > 0xFFFFFFFF) { 202 printk(KERN_ERR PREFIX 203 "MMCONFIG not in low 4GB of memory\n"); 204 kfree(pci_mmcfg_config); 205 pci_mmcfg_config_num = 0; 206 return -ENODEV; 207 } 208 } 209 210 return 0; 211 } 212 #endif /* CONFIG_PCI_MMCONFIG */ 213 214 #ifdef CONFIG_X86_LOCAL_APIC 215 static int __init acpi_parse_madt(struct acpi_table_header *table) 216 { 217 struct acpi_table_madt *madt = NULL; 218 219 if (!cpu_has_apic) 220 return -EINVAL; 221 222 madt = (struct acpi_table_madt *)table; 223 if (!madt) { 224 printk(KERN_WARNING PREFIX "Unable to map MADT\n"); 225 return -ENODEV; 226 } 227 228 if (madt->address) { 229 acpi_lapic_addr = (u64) madt->address; 230 231 printk(KERN_DEBUG PREFIX "Local APIC address 0x%08x\n", 232 madt->address); 233 } 234 235 acpi_madt_oem_check(madt->header.oem_id, madt->header.oem_table_id); 236 237 return 0; 238 } 239 240 static int __init 241 acpi_parse_lapic(struct acpi_subtable_header * header, const unsigned long end) 242 { 243 struct acpi_madt_local_apic *processor = NULL; 244 245 processor = (struct acpi_madt_local_apic *)header; 246 247 if (BAD_MADT_ENTRY(processor, end)) 248 return -EINVAL; 249 250 acpi_table_print_madt_entry(header); 251 252 /* 253 * We need to register disabled CPU as well to permit 254 * counting disabled CPUs. This allows us to size 255 * cpus_possible_map more accurately, to permit 256 * to not preallocating memory for all NR_CPUS 257 * when we use CPU hotplug. 258 */ 259 mp_register_lapic(processor->id, /* APIC ID */ 260 processor->lapic_flags & ACPI_MADT_ENABLED); /* Enabled? */ 261 262 return 0; 263 } 264 265 static int __init 266 acpi_parse_lapic_addr_ovr(struct acpi_subtable_header * header, 267 const unsigned long end) 268 { 269 struct acpi_madt_local_apic_override *lapic_addr_ovr = NULL; 270 271 lapic_addr_ovr = (struct acpi_madt_local_apic_override *)header; 272 273 if (BAD_MADT_ENTRY(lapic_addr_ovr, end)) 274 return -EINVAL; 275 276 acpi_lapic_addr = lapic_addr_ovr->address; 277 278 return 0; 279 } 280 281 static int __init 282 acpi_parse_lapic_nmi(struct acpi_subtable_header * header, const unsigned long end) 283 { 284 struct acpi_madt_local_apic_nmi *lapic_nmi = NULL; 285 286 lapic_nmi = (struct acpi_madt_local_apic_nmi *)header; 287 288 if (BAD_MADT_ENTRY(lapic_nmi, end)) 289 return -EINVAL; 290 291 acpi_table_print_madt_entry(header); 292 293 if (lapic_nmi->lint != 1) 294 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n"); 295 296 return 0; 297 } 298 299 #endif /*CONFIG_X86_LOCAL_APIC */ 300 301 #ifdef CONFIG_X86_IO_APIC 302 303 static int __init 304 acpi_parse_ioapic(struct acpi_subtable_header * header, const unsigned long end) 305 { 306 struct acpi_madt_io_apic *ioapic = NULL; 307 308 ioapic = (struct acpi_madt_io_apic *)header; 309 310 if (BAD_MADT_ENTRY(ioapic, end)) 311 return -EINVAL; 312 313 acpi_table_print_madt_entry(header); 314 315 mp_register_ioapic(ioapic->id, 316 ioapic->address, ioapic->global_irq_base); 317 318 return 0; 319 } 320 321 /* 322 * Parse Interrupt Source Override for the ACPI SCI 323 */ 324 static void __init acpi_sci_ioapic_setup(u32 gsi, u16 polarity, u16 trigger) 325 { 326 if (trigger == 0) /* compatible SCI trigger is level */ 327 trigger = 3; 328 329 if (polarity == 0) /* compatible SCI polarity is low */ 330 polarity = 3; 331 332 /* Command-line over-ride via acpi_sci= */ 333 if (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) 334 trigger = (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2; 335 336 if (acpi_sci_flags & ACPI_MADT_POLARITY_MASK) 337 polarity = acpi_sci_flags & ACPI_MADT_POLARITY_MASK; 338 339 /* 340 * mp_config_acpi_legacy_irqs() already setup IRQs < 16 341 * If GSI is < 16, this will update its flags, 342 * else it will create a new mp_irqs[] entry. 343 */ 344 mp_override_legacy_irq(gsi, polarity, trigger, gsi); 345 346 /* 347 * stash over-ride to indicate we've been here 348 * and for later update of acpi_gbl_FADT 349 */ 350 acpi_sci_override_gsi = gsi; 351 return; 352 } 353 354 static int __init 355 acpi_parse_int_src_ovr(struct acpi_subtable_header * header, 356 const unsigned long end) 357 { 358 struct acpi_madt_interrupt_override *intsrc = NULL; 359 360 intsrc = (struct acpi_madt_interrupt_override *)header; 361 362 if (BAD_MADT_ENTRY(intsrc, end)) 363 return -EINVAL; 364 365 acpi_table_print_madt_entry(header); 366 367 if (intsrc->source_irq == acpi_gbl_FADT.sci_interrupt) { 368 acpi_sci_ioapic_setup(intsrc->global_irq, 369 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK, 370 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2); 371 return 0; 372 } 373 374 if (acpi_skip_timer_override && 375 intsrc->source_irq == 0 && intsrc->global_irq == 2) { 376 printk(PREFIX "BIOS IRQ0 pin2 override ignored.\n"); 377 return 0; 378 } 379 380 mp_override_legacy_irq(intsrc->source_irq, 381 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK, 382 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2, 383 intsrc->global_irq); 384 385 return 0; 386 } 387 388 static int __init 389 acpi_parse_nmi_src(struct acpi_subtable_header * header, const unsigned long end) 390 { 391 struct acpi_madt_nmi_source *nmi_src = NULL; 392 393 nmi_src = (struct acpi_madt_nmi_source *)header; 394 395 if (BAD_MADT_ENTRY(nmi_src, end)) 396 return -EINVAL; 397 398 acpi_table_print_madt_entry(header); 399 400 /* TBD: Support nimsrc entries? */ 401 402 return 0; 403 } 404 405 #endif /* CONFIG_X86_IO_APIC */ 406 407 /* 408 * acpi_pic_sci_set_trigger() 409 * 410 * use ELCR to set PIC-mode trigger type for SCI 411 * 412 * If a PIC-mode SCI is not recognized or gives spurious IRQ7's 413 * it may require Edge Trigger -- use "acpi_sci=edge" 414 * 415 * Port 0x4d0-4d1 are ECLR1 and ECLR2, the Edge/Level Control Registers 416 * for the 8259 PIC. bit[n] = 1 means irq[n] is Level, otherwise Edge. 417 * ECLR1 is IRQs 0-7 (IRQ 0, 1, 2 must be 0) 418 * ECLR2 is IRQs 8-15 (IRQ 8, 13 must be 0) 419 */ 420 421 void __init acpi_pic_sci_set_trigger(unsigned int irq, u16 trigger) 422 { 423 unsigned int mask = 1 << irq; 424 unsigned int old, new; 425 426 /* Real old ELCR mask */ 427 old = inb(0x4d0) | (inb(0x4d1) << 8); 428 429 /* 430 * If we use ACPI to set PCI IRQs, then we should clear ELCR 431 * since we will set it correctly as we enable the PCI irq 432 * routing. 433 */ 434 new = acpi_noirq ? old : 0; 435 436 /* 437 * Update SCI information in the ELCR, it isn't in the PCI 438 * routing tables.. 439 */ 440 switch (trigger) { 441 case 1: /* Edge - clear */ 442 new &= ~mask; 443 break; 444 case 3: /* Level - set */ 445 new |= mask; 446 break; 447 } 448 449 if (old == new) 450 return; 451 452 printk(PREFIX "setting ELCR to %04x (from %04x)\n", new, old); 453 outb(new, 0x4d0); 454 outb(new >> 8, 0x4d1); 455 } 456 457 int acpi_gsi_to_irq(u32 gsi, unsigned int *irq) 458 { 459 *irq = gsi; 460 return 0; 461 } 462 463 /* 464 * success: return IRQ number (>=0) 465 * failure: return < 0 466 */ 467 int acpi_register_gsi(u32 gsi, int triggering, int polarity) 468 { 469 unsigned int irq; 470 unsigned int plat_gsi = gsi; 471 472 #ifdef CONFIG_PCI 473 /* 474 * Make sure all (legacy) PCI IRQs are set as level-triggered. 475 */ 476 if (acpi_irq_model == ACPI_IRQ_MODEL_PIC) { 477 extern void eisa_set_level_irq(unsigned int irq); 478 479 if (triggering == ACPI_LEVEL_SENSITIVE) 480 eisa_set_level_irq(gsi); 481 } 482 #endif 483 484 #ifdef CONFIG_X86_IO_APIC 485 if (acpi_irq_model == ACPI_IRQ_MODEL_IOAPIC) { 486 plat_gsi = mp_register_gsi(gsi, triggering, polarity); 487 } 488 #endif 489 acpi_gsi_to_irq(plat_gsi, &irq); 490 return irq; 491 } 492 493 EXPORT_SYMBOL(acpi_register_gsi); 494 495 /* 496 * ACPI based hotplug support for CPU 497 */ 498 #ifdef CONFIG_ACPI_HOTPLUG_CPU 499 int acpi_map_lsapic(acpi_handle handle, int *pcpu) 500 { 501 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; 502 union acpi_object *obj; 503 struct acpi_madt_local_apic *lapic; 504 cpumask_t tmp_map, new_map; 505 u8 physid; 506 int cpu; 507 508 if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer))) 509 return -EINVAL; 510 511 if (!buffer.length || !buffer.pointer) 512 return -EINVAL; 513 514 obj = buffer.pointer; 515 if (obj->type != ACPI_TYPE_BUFFER || 516 obj->buffer.length < sizeof(*lapic)) { 517 kfree(buffer.pointer); 518 return -EINVAL; 519 } 520 521 lapic = (struct acpi_madt_local_apic *)obj->buffer.pointer; 522 523 if (lapic->header.type != ACPI_MADT_TYPE_LOCAL_APIC || 524 !(lapic->lapic_flags & ACPI_MADT_ENABLED)) { 525 kfree(buffer.pointer); 526 return -EINVAL; 527 } 528 529 physid = lapic->id; 530 531 kfree(buffer.pointer); 532 buffer.length = ACPI_ALLOCATE_BUFFER; 533 buffer.pointer = NULL; 534 535 tmp_map = cpu_present_map; 536 mp_register_lapic(physid, lapic->lapic_flags & ACPI_MADT_ENABLED); 537 538 /* 539 * If mp_register_lapic successfully generates a new logical cpu 540 * number, then the following will get us exactly what was mapped 541 */ 542 cpus_andnot(new_map, cpu_present_map, tmp_map); 543 if (cpus_empty(new_map)) { 544 printk ("Unable to map lapic to logical cpu number\n"); 545 return -EINVAL; 546 } 547 548 cpu = first_cpu(new_map); 549 550 *pcpu = cpu; 551 return 0; 552 } 553 554 EXPORT_SYMBOL(acpi_map_lsapic); 555 556 int acpi_unmap_lsapic(int cpu) 557 { 558 per_cpu(x86_cpu_to_apicid, cpu) = -1; 559 cpu_clear(cpu, cpu_present_map); 560 num_processors--; 561 562 return (0); 563 } 564 565 EXPORT_SYMBOL(acpi_unmap_lsapic); 566 #endif /* CONFIG_ACPI_HOTPLUG_CPU */ 567 568 int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base) 569 { 570 /* TBD */ 571 return -EINVAL; 572 } 573 574 EXPORT_SYMBOL(acpi_register_ioapic); 575 576 int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base) 577 { 578 /* TBD */ 579 return -EINVAL; 580 } 581 582 EXPORT_SYMBOL(acpi_unregister_ioapic); 583 584 static unsigned long __init 585 acpi_scan_rsdp(unsigned long start, unsigned long length) 586 { 587 unsigned long offset = 0; 588 unsigned long sig_len = sizeof("RSD PTR ") - 1; 589 590 /* 591 * Scan all 16-byte boundaries of the physical memory region for the 592 * RSDP signature. 593 */ 594 for (offset = 0; offset < length; offset += 16) { 595 if (strncmp((char *)(phys_to_virt(start) + offset), "RSD PTR ", sig_len)) 596 continue; 597 return (start + offset); 598 } 599 600 return 0; 601 } 602 603 static int __init acpi_parse_sbf(struct acpi_table_header *table) 604 { 605 struct acpi_table_boot *sb; 606 607 sb = (struct acpi_table_boot *)table; 608 if (!sb) { 609 printk(KERN_WARNING PREFIX "Unable to map SBF\n"); 610 return -ENODEV; 611 } 612 613 sbf_port = sb->cmos_index; /* Save CMOS port */ 614 615 return 0; 616 } 617 618 #ifdef CONFIG_HPET_TIMER 619 #include <asm/hpet.h> 620 621 static struct __initdata resource *hpet_res; 622 623 static int __init acpi_parse_hpet(struct acpi_table_header *table) 624 { 625 struct acpi_table_hpet *hpet_tbl; 626 627 hpet_tbl = (struct acpi_table_hpet *)table; 628 if (!hpet_tbl) { 629 printk(KERN_WARNING PREFIX "Unable to map HPET\n"); 630 return -ENODEV; 631 } 632 633 if (hpet_tbl->address.space_id != ACPI_SPACE_MEM) { 634 printk(KERN_WARNING PREFIX "HPET timers must be located in " 635 "memory.\n"); 636 return -1; 637 } 638 639 hpet_address = hpet_tbl->address.address; 640 641 /* 642 * Some broken BIOSes advertise HPET at 0x0. We really do not 643 * want to allocate a resource there. 644 */ 645 if (!hpet_address) { 646 printk(KERN_WARNING PREFIX 647 "HPET id: %#x base: %#lx is invalid\n", 648 hpet_tbl->id, hpet_address); 649 return 0; 650 } 651 #ifdef CONFIG_X86_64 652 /* 653 * Some even more broken BIOSes advertise HPET at 654 * 0xfed0000000000000 instead of 0xfed00000. Fix it up and add 655 * some noise: 656 */ 657 if (hpet_address == 0xfed0000000000000UL) { 658 if (!hpet_force_user) { 659 printk(KERN_WARNING PREFIX "HPET id: %#x " 660 "base: 0xfed0000000000000 is bogus\n " 661 "try hpet=force on the kernel command line to " 662 "fix it up to 0xfed00000.\n", hpet_tbl->id); 663 hpet_address = 0; 664 return 0; 665 } 666 printk(KERN_WARNING PREFIX 667 "HPET id: %#x base: 0xfed0000000000000 fixed up " 668 "to 0xfed00000.\n", hpet_tbl->id); 669 hpet_address >>= 32; 670 } 671 #endif 672 printk(KERN_INFO PREFIX "HPET id: %#x base: %#lx\n", 673 hpet_tbl->id, hpet_address); 674 675 /* 676 * Allocate and initialize the HPET firmware resource for adding into 677 * the resource tree during the lateinit timeframe. 678 */ 679 #define HPET_RESOURCE_NAME_SIZE 9 680 hpet_res = alloc_bootmem(sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE); 681 682 if (!hpet_res) 683 return 0; 684 685 memset(hpet_res, 0, sizeof(*hpet_res)); 686 hpet_res->name = (void *)&hpet_res[1]; 687 hpet_res->flags = IORESOURCE_MEM; 688 snprintf((char *)hpet_res->name, HPET_RESOURCE_NAME_SIZE, "HPET %u", 689 hpet_tbl->sequence); 690 691 hpet_res->start = hpet_address; 692 hpet_res->end = hpet_address + (1 * 1024) - 1; 693 694 return 0; 695 } 696 697 /* 698 * hpet_insert_resource inserts the HPET resources used into the resource 699 * tree. 700 */ 701 static __init int hpet_insert_resource(void) 702 { 703 if (!hpet_res) 704 return 1; 705 706 return insert_resource(&iomem_resource, hpet_res); 707 } 708 709 late_initcall(hpet_insert_resource); 710 711 #else 712 #define acpi_parse_hpet NULL 713 #endif 714 715 static int __init acpi_parse_fadt(struct acpi_table_header *table) 716 { 717 718 #ifdef CONFIG_X86_PM_TIMER 719 /* detect the location of the ACPI PM Timer */ 720 if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID) { 721 /* FADT rev. 2 */ 722 if (acpi_gbl_FADT.xpm_timer_block.space_id != 723 ACPI_ADR_SPACE_SYSTEM_IO) 724 return 0; 725 726 pmtmr_ioport = acpi_gbl_FADT.xpm_timer_block.address; 727 /* 728 * "X" fields are optional extensions to the original V1.0 729 * fields, so we must selectively expand V1.0 fields if the 730 * corresponding X field is zero. 731 */ 732 if (!pmtmr_ioport) 733 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block; 734 } else { 735 /* FADT rev. 1 */ 736 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block; 737 } 738 if (pmtmr_ioport) 739 printk(KERN_INFO PREFIX "PM-Timer IO Port: %#x\n", 740 pmtmr_ioport); 741 #endif 742 return 0; 743 } 744 745 unsigned long __init acpi_find_rsdp(void) 746 { 747 unsigned long rsdp_phys = 0; 748 749 if (efi_enabled) { 750 if (efi.acpi20 != EFI_INVALID_TABLE_ADDR) 751 return efi.acpi20; 752 else if (efi.acpi != EFI_INVALID_TABLE_ADDR) 753 return efi.acpi; 754 } 755 /* 756 * Scan memory looking for the RSDP signature. First search EBDA (low 757 * memory) paragraphs and then search upper memory (E0000-FFFFF). 758 */ 759 rsdp_phys = acpi_scan_rsdp(0, 0x400); 760 if (!rsdp_phys) 761 rsdp_phys = acpi_scan_rsdp(0xE0000, 0x20000); 762 763 return rsdp_phys; 764 } 765 766 #ifdef CONFIG_X86_LOCAL_APIC 767 /* 768 * Parse LAPIC entries in MADT 769 * returns 0 on success, < 0 on error 770 */ 771 static int __init acpi_parse_madt_lapic_entries(void) 772 { 773 int count; 774 775 if (!cpu_has_apic) 776 return -ENODEV; 777 778 /* 779 * Note that the LAPIC address is obtained from the MADT (32-bit value) 780 * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value). 781 */ 782 783 count = 784 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE, 785 acpi_parse_lapic_addr_ovr, 0); 786 if (count < 0) { 787 printk(KERN_ERR PREFIX 788 "Error parsing LAPIC address override entry\n"); 789 return count; 790 } 791 792 mp_register_lapic_address(acpi_lapic_addr); 793 794 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC, acpi_parse_lapic, 795 MAX_APICS); 796 if (!count) { 797 printk(KERN_ERR PREFIX "No LAPIC entries present\n"); 798 /* TBD: Cleanup to allow fallback to MPS */ 799 return -ENODEV; 800 } else if (count < 0) { 801 printk(KERN_ERR PREFIX "Error parsing LAPIC entry\n"); 802 /* TBD: Cleanup to allow fallback to MPS */ 803 return count; 804 } 805 806 count = 807 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI, acpi_parse_lapic_nmi, 0); 808 if (count < 0) { 809 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n"); 810 /* TBD: Cleanup to allow fallback to MPS */ 811 return count; 812 } 813 return 0; 814 } 815 #endif /* CONFIG_X86_LOCAL_APIC */ 816 817 #ifdef CONFIG_X86_IO_APIC 818 /* 819 * Parse IOAPIC related entries in MADT 820 * returns 0 on success, < 0 on error 821 */ 822 static int __init acpi_parse_madt_ioapic_entries(void) 823 { 824 int count; 825 826 /* 827 * ACPI interpreter is required to complete interrupt setup, 828 * so if it is off, don't enumerate the io-apics with ACPI. 829 * If MPS is present, it will handle them, 830 * otherwise the system will stay in PIC mode 831 */ 832 if (acpi_disabled || acpi_noirq) { 833 return -ENODEV; 834 } 835 836 if (!cpu_has_apic) 837 return -ENODEV; 838 839 /* 840 * if "noapic" boot option, don't look for IO-APICs 841 */ 842 if (skip_ioapic_setup) { 843 printk(KERN_INFO PREFIX "Skipping IOAPIC probe " 844 "due to 'noapic' option.\n"); 845 return -ENODEV; 846 } 847 848 count = 849 acpi_table_parse_madt(ACPI_MADT_TYPE_IO_APIC, acpi_parse_ioapic, 850 MAX_IO_APICS); 851 if (!count) { 852 printk(KERN_ERR PREFIX "No IOAPIC entries present\n"); 853 return -ENODEV; 854 } else if (count < 0) { 855 printk(KERN_ERR PREFIX "Error parsing IOAPIC entry\n"); 856 return count; 857 } 858 859 count = 860 acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE, acpi_parse_int_src_ovr, 861 NR_IRQ_VECTORS); 862 if (count < 0) { 863 printk(KERN_ERR PREFIX 864 "Error parsing interrupt source overrides entry\n"); 865 /* TBD: Cleanup to allow fallback to MPS */ 866 return count; 867 } 868 869 /* 870 * If BIOS did not supply an INT_SRC_OVR for the SCI 871 * pretend we got one so we can set the SCI flags. 872 */ 873 if (!acpi_sci_override_gsi) 874 acpi_sci_ioapic_setup(acpi_gbl_FADT.sci_interrupt, 0, 0); 875 876 /* Fill in identity legacy mapings where no override */ 877 mp_config_acpi_legacy_irqs(); 878 879 count = 880 acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE, acpi_parse_nmi_src, 881 NR_IRQ_VECTORS); 882 if (count < 0) { 883 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n"); 884 /* TBD: Cleanup to allow fallback to MPS */ 885 return count; 886 } 887 888 return 0; 889 } 890 #else 891 static inline int acpi_parse_madt_ioapic_entries(void) 892 { 893 return -1; 894 } 895 #endif /* !CONFIG_X86_IO_APIC */ 896 897 static void __init acpi_process_madt(void) 898 { 899 #ifdef CONFIG_X86_LOCAL_APIC 900 int error; 901 902 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) { 903 904 /* 905 * Parse MADT LAPIC entries 906 */ 907 error = acpi_parse_madt_lapic_entries(); 908 if (!error) { 909 acpi_lapic = 1; 910 911 #ifdef CONFIG_X86_GENERICARCH 912 generic_bigsmp_probe(); 913 #endif 914 /* 915 * Parse MADT IO-APIC entries 916 */ 917 error = acpi_parse_madt_ioapic_entries(); 918 if (!error) { 919 acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC; 920 acpi_irq_balance_set(NULL); 921 acpi_ioapic = 1; 922 923 smp_found_config = 1; 924 setup_apic_routing(); 925 } 926 } 927 if (error == -EINVAL) { 928 /* 929 * Dell Precision Workstation 410, 610 come here. 930 */ 931 printk(KERN_ERR PREFIX 932 "Invalid BIOS MADT, disabling ACPI\n"); 933 disable_acpi(); 934 } 935 } 936 #endif 937 return; 938 } 939 940 #ifdef __i386__ 941 942 static int __init disable_acpi_irq(const struct dmi_system_id *d) 943 { 944 if (!acpi_force) { 945 printk(KERN_NOTICE "%s detected: force use of acpi=noirq\n", 946 d->ident); 947 acpi_noirq_set(); 948 } 949 return 0; 950 } 951 952 static int __init disable_acpi_pci(const struct dmi_system_id *d) 953 { 954 if (!acpi_force) { 955 printk(KERN_NOTICE "%s detected: force use of pci=noacpi\n", 956 d->ident); 957 acpi_disable_pci(); 958 } 959 return 0; 960 } 961 962 static int __init dmi_disable_acpi(const struct dmi_system_id *d) 963 { 964 if (!acpi_force) { 965 printk(KERN_NOTICE "%s detected: acpi off\n", d->ident); 966 disable_acpi(); 967 } else { 968 printk(KERN_NOTICE 969 "Warning: DMI blacklist says broken, but acpi forced\n"); 970 } 971 return 0; 972 } 973 974 /* 975 * Limit ACPI to CPU enumeration for HT 976 */ 977 static int __init force_acpi_ht(const struct dmi_system_id *d) 978 { 979 if (!acpi_force) { 980 printk(KERN_NOTICE "%s detected: force use of acpi=ht\n", 981 d->ident); 982 disable_acpi(); 983 acpi_ht = 1; 984 } else { 985 printk(KERN_NOTICE 986 "Warning: acpi=force overrules DMI blacklist: acpi=ht\n"); 987 } 988 return 0; 989 } 990 991 /* 992 * If your system is blacklisted here, but you find that acpi=force 993 * works for you, please contact acpi-devel@sourceforge.net 994 */ 995 static struct dmi_system_id __initdata acpi_dmi_table[] = { 996 /* 997 * Boxes that need ACPI disabled 998 */ 999 { 1000 .callback = dmi_disable_acpi, 1001 .ident = "IBM Thinkpad", 1002 .matches = { 1003 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), 1004 DMI_MATCH(DMI_BOARD_NAME, "2629H1G"), 1005 }, 1006 }, 1007 1008 /* 1009 * Boxes that need acpi=ht 1010 */ 1011 { 1012 .callback = force_acpi_ht, 1013 .ident = "FSC Primergy T850", 1014 .matches = { 1015 DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"), 1016 DMI_MATCH(DMI_PRODUCT_NAME, "PRIMERGY T850"), 1017 }, 1018 }, 1019 { 1020 .callback = force_acpi_ht, 1021 .ident = "HP VISUALIZE NT Workstation", 1022 .matches = { 1023 DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"), 1024 DMI_MATCH(DMI_PRODUCT_NAME, "HP VISUALIZE NT Workstation"), 1025 }, 1026 }, 1027 { 1028 .callback = force_acpi_ht, 1029 .ident = "Compaq Workstation W8000", 1030 .matches = { 1031 DMI_MATCH(DMI_SYS_VENDOR, "Compaq"), 1032 DMI_MATCH(DMI_PRODUCT_NAME, "Workstation W8000"), 1033 }, 1034 }, 1035 { 1036 .callback = force_acpi_ht, 1037 .ident = "ASUS P4B266", 1038 .matches = { 1039 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."), 1040 DMI_MATCH(DMI_BOARD_NAME, "P4B266"), 1041 }, 1042 }, 1043 { 1044 .callback = force_acpi_ht, 1045 .ident = "ASUS P2B-DS", 1046 .matches = { 1047 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."), 1048 DMI_MATCH(DMI_BOARD_NAME, "P2B-DS"), 1049 }, 1050 }, 1051 { 1052 .callback = force_acpi_ht, 1053 .ident = "ASUS CUR-DLS", 1054 .matches = { 1055 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."), 1056 DMI_MATCH(DMI_BOARD_NAME, "CUR-DLS"), 1057 }, 1058 }, 1059 { 1060 .callback = force_acpi_ht, 1061 .ident = "ABIT i440BX-W83977", 1062 .matches = { 1063 DMI_MATCH(DMI_BOARD_VENDOR, "ABIT <http://www.abit.com>"), 1064 DMI_MATCH(DMI_BOARD_NAME, "i440BX-W83977 (BP6)"), 1065 }, 1066 }, 1067 { 1068 .callback = force_acpi_ht, 1069 .ident = "IBM Bladecenter", 1070 .matches = { 1071 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), 1072 DMI_MATCH(DMI_BOARD_NAME, "IBM eServer BladeCenter HS20"), 1073 }, 1074 }, 1075 { 1076 .callback = force_acpi_ht, 1077 .ident = "IBM eServer xSeries 360", 1078 .matches = { 1079 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), 1080 DMI_MATCH(DMI_BOARD_NAME, "eServer xSeries 360"), 1081 }, 1082 }, 1083 { 1084 .callback = force_acpi_ht, 1085 .ident = "IBM eserver xSeries 330", 1086 .matches = { 1087 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), 1088 DMI_MATCH(DMI_BOARD_NAME, "eserver xSeries 330"), 1089 }, 1090 }, 1091 { 1092 .callback = force_acpi_ht, 1093 .ident = "IBM eserver xSeries 440", 1094 .matches = { 1095 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), 1096 DMI_MATCH(DMI_PRODUCT_NAME, "eserver xSeries 440"), 1097 }, 1098 }, 1099 1100 /* 1101 * Boxes that need ACPI PCI IRQ routing disabled 1102 */ 1103 { 1104 .callback = disable_acpi_irq, 1105 .ident = "ASUS A7V", 1106 .matches = { 1107 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC"), 1108 DMI_MATCH(DMI_BOARD_NAME, "<A7V>"), 1109 /* newer BIOS, Revision 1011, does work */ 1110 DMI_MATCH(DMI_BIOS_VERSION, 1111 "ASUS A7V ACPI BIOS Revision 1007"), 1112 }, 1113 }, 1114 { 1115 /* 1116 * Latest BIOS for IBM 600E (1.16) has bad pcinum 1117 * for LPC bridge, which is needed for the PCI 1118 * interrupt links to work. DSDT fix is in bug 5966. 1119 * 2645, 2646 model numbers are shared with 600/600E/600X 1120 */ 1121 .callback = disable_acpi_irq, 1122 .ident = "IBM Thinkpad 600 Series 2645", 1123 .matches = { 1124 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), 1125 DMI_MATCH(DMI_BOARD_NAME, "2645"), 1126 }, 1127 }, 1128 { 1129 .callback = disable_acpi_irq, 1130 .ident = "IBM Thinkpad 600 Series 2646", 1131 .matches = { 1132 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), 1133 DMI_MATCH(DMI_BOARD_NAME, "2646"), 1134 }, 1135 }, 1136 /* 1137 * Boxes that need ACPI PCI IRQ routing and PCI scan disabled 1138 */ 1139 { /* _BBN 0 bug */ 1140 .callback = disable_acpi_pci, 1141 .ident = "ASUS PR-DLS", 1142 .matches = { 1143 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."), 1144 DMI_MATCH(DMI_BOARD_NAME, "PR-DLS"), 1145 DMI_MATCH(DMI_BIOS_VERSION, 1146 "ASUS PR-DLS ACPI BIOS Revision 1010"), 1147 DMI_MATCH(DMI_BIOS_DATE, "03/21/2003") 1148 }, 1149 }, 1150 { 1151 .callback = disable_acpi_pci, 1152 .ident = "Acer TravelMate 36x Laptop", 1153 .matches = { 1154 DMI_MATCH(DMI_SYS_VENDOR, "Acer"), 1155 DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"), 1156 }, 1157 }, 1158 {} 1159 }; 1160 1161 #endif /* __i386__ */ 1162 1163 /* 1164 * acpi_boot_table_init() and acpi_boot_init() 1165 * called from setup_arch(), always. 1166 * 1. checksums all tables 1167 * 2. enumerates lapics 1168 * 3. enumerates io-apics 1169 * 1170 * acpi_table_init() is separate to allow reading SRAT without 1171 * other side effects. 1172 * 1173 * side effects of acpi_boot_init: 1174 * acpi_lapic = 1 if LAPIC found 1175 * acpi_ioapic = 1 if IOAPIC found 1176 * if (acpi_lapic && acpi_ioapic) smp_found_config = 1; 1177 * if acpi_blacklisted() acpi_disabled = 1; 1178 * acpi_irq_model=... 1179 * ... 1180 * 1181 * return value: (currently ignored) 1182 * 0: success 1183 * !0: failure 1184 */ 1185 1186 int __init acpi_boot_table_init(void) 1187 { 1188 int error; 1189 1190 #ifdef __i386__ 1191 dmi_check_system(acpi_dmi_table); 1192 #endif 1193 1194 /* 1195 * If acpi_disabled, bail out 1196 * One exception: acpi=ht continues far enough to enumerate LAPICs 1197 */ 1198 if (acpi_disabled && !acpi_ht) 1199 return 1; 1200 1201 /* 1202 * Initialize the ACPI boot-time table parser. 1203 */ 1204 error = acpi_table_init(); 1205 if (error) { 1206 disable_acpi(); 1207 return error; 1208 } 1209 1210 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf); 1211 1212 /* 1213 * blacklist may disable ACPI entirely 1214 */ 1215 error = acpi_blacklisted(); 1216 if (error) { 1217 if (acpi_force) { 1218 printk(KERN_WARNING PREFIX "acpi=force override\n"); 1219 } else { 1220 printk(KERN_WARNING PREFIX "Disabling ACPI support\n"); 1221 disable_acpi(); 1222 return error; 1223 } 1224 } 1225 1226 return 0; 1227 } 1228 1229 int __init acpi_boot_init(void) 1230 { 1231 /* 1232 * If acpi_disabled, bail out 1233 * One exception: acpi=ht continues far enough to enumerate LAPICs 1234 */ 1235 if (acpi_disabled && !acpi_ht) 1236 return 1; 1237 1238 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf); 1239 1240 /* 1241 * set sci_int and PM timer address 1242 */ 1243 acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt); 1244 1245 /* 1246 * Process the Multiple APIC Description Table (MADT), if present 1247 */ 1248 acpi_process_madt(); 1249 1250 acpi_table_parse(ACPI_SIG_HPET, acpi_parse_hpet); 1251 1252 return 0; 1253 } 1254 1255 static int __init parse_acpi(char *arg) 1256 { 1257 if (!arg) 1258 return -EINVAL; 1259 1260 /* "acpi=off" disables both ACPI table parsing and interpreter */ 1261 if (strcmp(arg, "off") == 0) { 1262 disable_acpi(); 1263 } 1264 /* acpi=force to over-ride black-list */ 1265 else if (strcmp(arg, "force") == 0) { 1266 acpi_force = 1; 1267 acpi_ht = 1; 1268 acpi_disabled = 0; 1269 } 1270 /* acpi=strict disables out-of-spec workarounds */ 1271 else if (strcmp(arg, "strict") == 0) { 1272 acpi_strict = 1; 1273 } 1274 /* Limit ACPI just to boot-time to enable HT */ 1275 else if (strcmp(arg, "ht") == 0) { 1276 if (!acpi_force) 1277 disable_acpi(); 1278 acpi_ht = 1; 1279 } 1280 /* "acpi=noirq" disables ACPI interrupt routing */ 1281 else if (strcmp(arg, "noirq") == 0) { 1282 acpi_noirq_set(); 1283 } else { 1284 /* Core will printk when we return error. */ 1285 return -EINVAL; 1286 } 1287 return 0; 1288 } 1289 early_param("acpi", parse_acpi); 1290 1291 /* FIXME: Using pci= for an ACPI parameter is a travesty. */ 1292 static int __init parse_pci(char *arg) 1293 { 1294 if (arg && strcmp(arg, "noacpi") == 0) 1295 acpi_disable_pci(); 1296 return 0; 1297 } 1298 early_param("pci", parse_pci); 1299 1300 #ifdef CONFIG_X86_IO_APIC 1301 static int __init parse_acpi_skip_timer_override(char *arg) 1302 { 1303 acpi_skip_timer_override = 1; 1304 return 0; 1305 } 1306 early_param("acpi_skip_timer_override", parse_acpi_skip_timer_override); 1307 1308 static int __init parse_acpi_use_timer_override(char *arg) 1309 { 1310 acpi_use_timer_override = 1; 1311 return 0; 1312 } 1313 early_param("acpi_use_timer_override", parse_acpi_use_timer_override); 1314 #endif /* CONFIG_X86_IO_APIC */ 1315 1316 static int __init setup_acpi_sci(char *s) 1317 { 1318 if (!s) 1319 return -EINVAL; 1320 if (!strcmp(s, "edge")) 1321 acpi_sci_flags = ACPI_MADT_TRIGGER_EDGE | 1322 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK); 1323 else if (!strcmp(s, "level")) 1324 acpi_sci_flags = ACPI_MADT_TRIGGER_LEVEL | 1325 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK); 1326 else if (!strcmp(s, "high")) 1327 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_HIGH | 1328 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK); 1329 else if (!strcmp(s, "low")) 1330 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_LOW | 1331 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK); 1332 else 1333 return -EINVAL; 1334 return 0; 1335 } 1336 early_param("acpi_sci", setup_acpi_sci); 1337 1338 int __acpi_acquire_global_lock(unsigned int *lock) 1339 { 1340 unsigned int old, new, val; 1341 do { 1342 old = *lock; 1343 new = (((old & ~0x3) + 2) + ((old >> 1) & 0x1)); 1344 val = cmpxchg(lock, old, new); 1345 } while (unlikely (val != old)); 1346 return (new < 3) ? -1 : 0; 1347 } 1348 1349 int __acpi_release_global_lock(unsigned int *lock) 1350 { 1351 unsigned int old, new, val; 1352 do { 1353 old = *lock; 1354 new = old & ~0x3; 1355 val = cmpxchg(lock, old, new); 1356 } while (unlikely (val != old)); 1357 return old & 0x1; 1358 } 1359