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 499 500 static int __cpuinit _acpi_map_lsapic(acpi_handle handle, int *pcpu) 501 { 502 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; 503 union acpi_object *obj; 504 struct acpi_madt_local_apic *lapic; 505 cpumask_t tmp_map, new_map; 506 u8 physid; 507 int cpu; 508 509 if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer))) 510 return -EINVAL; 511 512 if (!buffer.length || !buffer.pointer) 513 return -EINVAL; 514 515 obj = buffer.pointer; 516 if (obj->type != ACPI_TYPE_BUFFER || 517 obj->buffer.length < sizeof(*lapic)) { 518 kfree(buffer.pointer); 519 return -EINVAL; 520 } 521 522 lapic = (struct acpi_madt_local_apic *)obj->buffer.pointer; 523 524 if (lapic->header.type != ACPI_MADT_TYPE_LOCAL_APIC || 525 !(lapic->lapic_flags & ACPI_MADT_ENABLED)) { 526 kfree(buffer.pointer); 527 return -EINVAL; 528 } 529 530 physid = lapic->id; 531 532 kfree(buffer.pointer); 533 buffer.length = ACPI_ALLOCATE_BUFFER; 534 buffer.pointer = NULL; 535 536 tmp_map = cpu_present_map; 537 mp_register_lapic(physid, lapic->lapic_flags & ACPI_MADT_ENABLED); 538 539 /* 540 * If mp_register_lapic successfully generates a new logical cpu 541 * number, then the following will get us exactly what was mapped 542 */ 543 cpus_andnot(new_map, cpu_present_map, tmp_map); 544 if (cpus_empty(new_map)) { 545 printk ("Unable to map lapic to logical cpu number\n"); 546 return -EINVAL; 547 } 548 549 cpu = first_cpu(new_map); 550 551 *pcpu = cpu; 552 return 0; 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 cpu_clear(cpu, cpu_present_map); 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 unsigned long __init 591 acpi_scan_rsdp(unsigned long start, unsigned long length) 592 { 593 unsigned long offset = 0; 594 unsigned long sig_len = sizeof("RSD PTR ") - 1; 595 596 /* 597 * Scan all 16-byte boundaries of the physical memory region for the 598 * RSDP signature. 599 */ 600 for (offset = 0; offset < length; offset += 16) { 601 if (strncmp((char *)(phys_to_virt(start) + offset), "RSD PTR ", sig_len)) 602 continue; 603 return (start + offset); 604 } 605 606 return 0; 607 } 608 609 static int __init acpi_parse_sbf(struct acpi_table_header *table) 610 { 611 struct acpi_table_boot *sb; 612 613 sb = (struct acpi_table_boot *)table; 614 if (!sb) { 615 printk(KERN_WARNING PREFIX "Unable to map SBF\n"); 616 return -ENODEV; 617 } 618 619 sbf_port = sb->cmos_index; /* Save CMOS port */ 620 621 return 0; 622 } 623 624 #ifdef CONFIG_HPET_TIMER 625 #include <asm/hpet.h> 626 627 static struct __initdata resource *hpet_res; 628 629 static int __init acpi_parse_hpet(struct acpi_table_header *table) 630 { 631 struct acpi_table_hpet *hpet_tbl; 632 633 hpet_tbl = (struct acpi_table_hpet *)table; 634 if (!hpet_tbl) { 635 printk(KERN_WARNING PREFIX "Unable to map HPET\n"); 636 return -ENODEV; 637 } 638 639 if (hpet_tbl->address.space_id != ACPI_SPACE_MEM) { 640 printk(KERN_WARNING PREFIX "HPET timers must be located in " 641 "memory.\n"); 642 return -1; 643 } 644 645 hpet_address = hpet_tbl->address.address; 646 647 /* 648 * Some broken BIOSes advertise HPET at 0x0. We really do not 649 * want to allocate a resource there. 650 */ 651 if (!hpet_address) { 652 printk(KERN_WARNING PREFIX 653 "HPET id: %#x base: %#lx is invalid\n", 654 hpet_tbl->id, hpet_address); 655 return 0; 656 } 657 #ifdef CONFIG_X86_64 658 /* 659 * Some even more broken BIOSes advertise HPET at 660 * 0xfed0000000000000 instead of 0xfed00000. Fix it up and add 661 * some noise: 662 */ 663 if (hpet_address == 0xfed0000000000000UL) { 664 if (!hpet_force_user) { 665 printk(KERN_WARNING PREFIX "HPET id: %#x " 666 "base: 0xfed0000000000000 is bogus\n " 667 "try hpet=force on the kernel command line to " 668 "fix it up to 0xfed00000.\n", hpet_tbl->id); 669 hpet_address = 0; 670 return 0; 671 } 672 printk(KERN_WARNING PREFIX 673 "HPET id: %#x base: 0xfed0000000000000 fixed up " 674 "to 0xfed00000.\n", hpet_tbl->id); 675 hpet_address >>= 32; 676 } 677 #endif 678 printk(KERN_INFO PREFIX "HPET id: %#x base: %#lx\n", 679 hpet_tbl->id, hpet_address); 680 681 /* 682 * Allocate and initialize the HPET firmware resource for adding into 683 * the resource tree during the lateinit timeframe. 684 */ 685 #define HPET_RESOURCE_NAME_SIZE 9 686 hpet_res = alloc_bootmem(sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE); 687 688 if (!hpet_res) 689 return 0; 690 691 memset(hpet_res, 0, sizeof(*hpet_res)); 692 hpet_res->name = (void *)&hpet_res[1]; 693 hpet_res->flags = IORESOURCE_MEM; 694 snprintf((char *)hpet_res->name, HPET_RESOURCE_NAME_SIZE, "HPET %u", 695 hpet_tbl->sequence); 696 697 hpet_res->start = hpet_address; 698 hpet_res->end = hpet_address + (1 * 1024) - 1; 699 700 return 0; 701 } 702 703 /* 704 * hpet_insert_resource inserts the HPET resources used into the resource 705 * tree. 706 */ 707 static __init int hpet_insert_resource(void) 708 { 709 if (!hpet_res) 710 return 1; 711 712 return insert_resource(&iomem_resource, hpet_res); 713 } 714 715 late_initcall(hpet_insert_resource); 716 717 #else 718 #define acpi_parse_hpet NULL 719 #endif 720 721 static int __init acpi_parse_fadt(struct acpi_table_header *table) 722 { 723 724 #ifdef CONFIG_X86_PM_TIMER 725 /* detect the location of the ACPI PM Timer */ 726 if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID) { 727 /* FADT rev. 2 */ 728 if (acpi_gbl_FADT.xpm_timer_block.space_id != 729 ACPI_ADR_SPACE_SYSTEM_IO) 730 return 0; 731 732 pmtmr_ioport = acpi_gbl_FADT.xpm_timer_block.address; 733 /* 734 * "X" fields are optional extensions to the original V1.0 735 * fields, so we must selectively expand V1.0 fields if the 736 * corresponding X field is zero. 737 */ 738 if (!pmtmr_ioport) 739 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block; 740 } else { 741 /* FADT rev. 1 */ 742 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block; 743 } 744 if (pmtmr_ioport) 745 printk(KERN_INFO PREFIX "PM-Timer IO Port: %#x\n", 746 pmtmr_ioport); 747 #endif 748 return 0; 749 } 750 751 unsigned long __init acpi_find_rsdp(void) 752 { 753 unsigned long rsdp_phys = 0; 754 755 if (efi_enabled) { 756 if (efi.acpi20 != EFI_INVALID_TABLE_ADDR) 757 return efi.acpi20; 758 else if (efi.acpi != EFI_INVALID_TABLE_ADDR) 759 return efi.acpi; 760 } 761 /* 762 * Scan memory looking for the RSDP signature. First search EBDA (low 763 * memory) paragraphs and then search upper memory (E0000-FFFFF). 764 */ 765 rsdp_phys = acpi_scan_rsdp(0, 0x400); 766 if (!rsdp_phys) 767 rsdp_phys = acpi_scan_rsdp(0xE0000, 0x20000); 768 769 return rsdp_phys; 770 } 771 772 #ifdef CONFIG_X86_LOCAL_APIC 773 /* 774 * Parse LAPIC entries in MADT 775 * returns 0 on success, < 0 on error 776 */ 777 static int __init acpi_parse_madt_lapic_entries(void) 778 { 779 int count; 780 781 if (!cpu_has_apic) 782 return -ENODEV; 783 784 /* 785 * Note that the LAPIC address is obtained from the MADT (32-bit value) 786 * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value). 787 */ 788 789 count = 790 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE, 791 acpi_parse_lapic_addr_ovr, 0); 792 if (count < 0) { 793 printk(KERN_ERR PREFIX 794 "Error parsing LAPIC address override entry\n"); 795 return count; 796 } 797 798 mp_register_lapic_address(acpi_lapic_addr); 799 800 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC, acpi_parse_lapic, 801 MAX_APICS); 802 if (!count) { 803 printk(KERN_ERR PREFIX "No LAPIC entries present\n"); 804 /* TBD: Cleanup to allow fallback to MPS */ 805 return -ENODEV; 806 } else if (count < 0) { 807 printk(KERN_ERR PREFIX "Error parsing LAPIC entry\n"); 808 /* TBD: Cleanup to allow fallback to MPS */ 809 return count; 810 } 811 812 count = 813 acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI, acpi_parse_lapic_nmi, 0); 814 if (count < 0) { 815 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n"); 816 /* TBD: Cleanup to allow fallback to MPS */ 817 return count; 818 } 819 return 0; 820 } 821 #endif /* CONFIG_X86_LOCAL_APIC */ 822 823 #ifdef CONFIG_X86_IO_APIC 824 /* 825 * Parse IOAPIC related entries in MADT 826 * returns 0 on success, < 0 on error 827 */ 828 static int __init acpi_parse_madt_ioapic_entries(void) 829 { 830 int count; 831 832 /* 833 * ACPI interpreter is required to complete interrupt setup, 834 * so if it is off, don't enumerate the io-apics with ACPI. 835 * If MPS is present, it will handle them, 836 * otherwise the system will stay in PIC mode 837 */ 838 if (acpi_disabled || acpi_noirq) { 839 return -ENODEV; 840 } 841 842 if (!cpu_has_apic) 843 return -ENODEV; 844 845 /* 846 * if "noapic" boot option, don't look for IO-APICs 847 */ 848 if (skip_ioapic_setup) { 849 printk(KERN_INFO PREFIX "Skipping IOAPIC probe " 850 "due to 'noapic' option.\n"); 851 return -ENODEV; 852 } 853 854 count = 855 acpi_table_parse_madt(ACPI_MADT_TYPE_IO_APIC, acpi_parse_ioapic, 856 MAX_IO_APICS); 857 if (!count) { 858 printk(KERN_ERR PREFIX "No IOAPIC entries present\n"); 859 return -ENODEV; 860 } else if (count < 0) { 861 printk(KERN_ERR PREFIX "Error parsing IOAPIC entry\n"); 862 return count; 863 } 864 865 count = 866 acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE, acpi_parse_int_src_ovr, 867 NR_IRQ_VECTORS); 868 if (count < 0) { 869 printk(KERN_ERR PREFIX 870 "Error parsing interrupt source overrides entry\n"); 871 /* TBD: Cleanup to allow fallback to MPS */ 872 return count; 873 } 874 875 /* 876 * If BIOS did not supply an INT_SRC_OVR for the SCI 877 * pretend we got one so we can set the SCI flags. 878 */ 879 if (!acpi_sci_override_gsi) 880 acpi_sci_ioapic_setup(acpi_gbl_FADT.sci_interrupt, 0, 0); 881 882 /* Fill in identity legacy mapings where no override */ 883 mp_config_acpi_legacy_irqs(); 884 885 count = 886 acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE, acpi_parse_nmi_src, 887 NR_IRQ_VECTORS); 888 if (count < 0) { 889 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n"); 890 /* TBD: Cleanup to allow fallback to MPS */ 891 return count; 892 } 893 894 return 0; 895 } 896 #else 897 static inline int acpi_parse_madt_ioapic_entries(void) 898 { 899 return -1; 900 } 901 #endif /* !CONFIG_X86_IO_APIC */ 902 903 static void __init acpi_process_madt(void) 904 { 905 #ifdef CONFIG_X86_LOCAL_APIC 906 int error; 907 908 if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) { 909 910 /* 911 * Parse MADT LAPIC entries 912 */ 913 error = acpi_parse_madt_lapic_entries(); 914 if (!error) { 915 acpi_lapic = 1; 916 917 #ifdef CONFIG_X86_GENERICARCH 918 generic_bigsmp_probe(); 919 #endif 920 /* 921 * Parse MADT IO-APIC entries 922 */ 923 error = acpi_parse_madt_ioapic_entries(); 924 if (!error) { 925 acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC; 926 acpi_irq_balance_set(NULL); 927 acpi_ioapic = 1; 928 929 smp_found_config = 1; 930 setup_apic_routing(); 931 } 932 } 933 if (error == -EINVAL) { 934 /* 935 * Dell Precision Workstation 410, 610 come here. 936 */ 937 printk(KERN_ERR PREFIX 938 "Invalid BIOS MADT, disabling ACPI\n"); 939 disable_acpi(); 940 } 941 } 942 #endif 943 return; 944 } 945 946 #ifdef __i386__ 947 948 static int __init disable_acpi_irq(const struct dmi_system_id *d) 949 { 950 if (!acpi_force) { 951 printk(KERN_NOTICE "%s detected: force use of acpi=noirq\n", 952 d->ident); 953 acpi_noirq_set(); 954 } 955 return 0; 956 } 957 958 static int __init disable_acpi_pci(const struct dmi_system_id *d) 959 { 960 if (!acpi_force) { 961 printk(KERN_NOTICE "%s detected: force use of pci=noacpi\n", 962 d->ident); 963 acpi_disable_pci(); 964 } 965 return 0; 966 } 967 968 static int __init dmi_disable_acpi(const struct dmi_system_id *d) 969 { 970 if (!acpi_force) { 971 printk(KERN_NOTICE "%s detected: acpi off\n", d->ident); 972 disable_acpi(); 973 } else { 974 printk(KERN_NOTICE 975 "Warning: DMI blacklist says broken, but acpi forced\n"); 976 } 977 return 0; 978 } 979 980 /* 981 * Limit ACPI to CPU enumeration for HT 982 */ 983 static int __init force_acpi_ht(const struct dmi_system_id *d) 984 { 985 if (!acpi_force) { 986 printk(KERN_NOTICE "%s detected: force use of acpi=ht\n", 987 d->ident); 988 disable_acpi(); 989 acpi_ht = 1; 990 } else { 991 printk(KERN_NOTICE 992 "Warning: acpi=force overrules DMI blacklist: acpi=ht\n"); 993 } 994 return 0; 995 } 996 997 /* 998 * If your system is blacklisted here, but you find that acpi=force 999 * works for you, please contact acpi-devel@sourceforge.net 1000 */ 1001 static struct dmi_system_id __initdata acpi_dmi_table[] = { 1002 /* 1003 * Boxes that need ACPI disabled 1004 */ 1005 { 1006 .callback = dmi_disable_acpi, 1007 .ident = "IBM Thinkpad", 1008 .matches = { 1009 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), 1010 DMI_MATCH(DMI_BOARD_NAME, "2629H1G"), 1011 }, 1012 }, 1013 1014 /* 1015 * Boxes that need acpi=ht 1016 */ 1017 { 1018 .callback = force_acpi_ht, 1019 .ident = "FSC Primergy T850", 1020 .matches = { 1021 DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"), 1022 DMI_MATCH(DMI_PRODUCT_NAME, "PRIMERGY T850"), 1023 }, 1024 }, 1025 { 1026 .callback = force_acpi_ht, 1027 .ident = "HP VISUALIZE NT Workstation", 1028 .matches = { 1029 DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"), 1030 DMI_MATCH(DMI_PRODUCT_NAME, "HP VISUALIZE NT Workstation"), 1031 }, 1032 }, 1033 { 1034 .callback = force_acpi_ht, 1035 .ident = "Compaq Workstation W8000", 1036 .matches = { 1037 DMI_MATCH(DMI_SYS_VENDOR, "Compaq"), 1038 DMI_MATCH(DMI_PRODUCT_NAME, "Workstation W8000"), 1039 }, 1040 }, 1041 { 1042 .callback = force_acpi_ht, 1043 .ident = "ASUS P4B266", 1044 .matches = { 1045 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."), 1046 DMI_MATCH(DMI_BOARD_NAME, "P4B266"), 1047 }, 1048 }, 1049 { 1050 .callback = force_acpi_ht, 1051 .ident = "ASUS P2B-DS", 1052 .matches = { 1053 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."), 1054 DMI_MATCH(DMI_BOARD_NAME, "P2B-DS"), 1055 }, 1056 }, 1057 { 1058 .callback = force_acpi_ht, 1059 .ident = "ASUS CUR-DLS", 1060 .matches = { 1061 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."), 1062 DMI_MATCH(DMI_BOARD_NAME, "CUR-DLS"), 1063 }, 1064 }, 1065 { 1066 .callback = force_acpi_ht, 1067 .ident = "ABIT i440BX-W83977", 1068 .matches = { 1069 DMI_MATCH(DMI_BOARD_VENDOR, "ABIT <http://www.abit.com>"), 1070 DMI_MATCH(DMI_BOARD_NAME, "i440BX-W83977 (BP6)"), 1071 }, 1072 }, 1073 { 1074 .callback = force_acpi_ht, 1075 .ident = "IBM Bladecenter", 1076 .matches = { 1077 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), 1078 DMI_MATCH(DMI_BOARD_NAME, "IBM eServer BladeCenter HS20"), 1079 }, 1080 }, 1081 { 1082 .callback = force_acpi_ht, 1083 .ident = "IBM eServer xSeries 360", 1084 .matches = { 1085 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), 1086 DMI_MATCH(DMI_BOARD_NAME, "eServer xSeries 360"), 1087 }, 1088 }, 1089 { 1090 .callback = force_acpi_ht, 1091 .ident = "IBM eserver xSeries 330", 1092 .matches = { 1093 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), 1094 DMI_MATCH(DMI_BOARD_NAME, "eserver xSeries 330"), 1095 }, 1096 }, 1097 { 1098 .callback = force_acpi_ht, 1099 .ident = "IBM eserver xSeries 440", 1100 .matches = { 1101 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), 1102 DMI_MATCH(DMI_PRODUCT_NAME, "eserver xSeries 440"), 1103 }, 1104 }, 1105 1106 /* 1107 * Boxes that need ACPI PCI IRQ routing disabled 1108 */ 1109 { 1110 .callback = disable_acpi_irq, 1111 .ident = "ASUS A7V", 1112 .matches = { 1113 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC"), 1114 DMI_MATCH(DMI_BOARD_NAME, "<A7V>"), 1115 /* newer BIOS, Revision 1011, does work */ 1116 DMI_MATCH(DMI_BIOS_VERSION, 1117 "ASUS A7V ACPI BIOS Revision 1007"), 1118 }, 1119 }, 1120 { 1121 /* 1122 * Latest BIOS for IBM 600E (1.16) has bad pcinum 1123 * for LPC bridge, which is needed for the PCI 1124 * interrupt links to work. DSDT fix is in bug 5966. 1125 * 2645, 2646 model numbers are shared with 600/600E/600X 1126 */ 1127 .callback = disable_acpi_irq, 1128 .ident = "IBM Thinkpad 600 Series 2645", 1129 .matches = { 1130 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), 1131 DMI_MATCH(DMI_BOARD_NAME, "2645"), 1132 }, 1133 }, 1134 { 1135 .callback = disable_acpi_irq, 1136 .ident = "IBM Thinkpad 600 Series 2646", 1137 .matches = { 1138 DMI_MATCH(DMI_BOARD_VENDOR, "IBM"), 1139 DMI_MATCH(DMI_BOARD_NAME, "2646"), 1140 }, 1141 }, 1142 /* 1143 * Boxes that need ACPI PCI IRQ routing and PCI scan disabled 1144 */ 1145 { /* _BBN 0 bug */ 1146 .callback = disable_acpi_pci, 1147 .ident = "ASUS PR-DLS", 1148 .matches = { 1149 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."), 1150 DMI_MATCH(DMI_BOARD_NAME, "PR-DLS"), 1151 DMI_MATCH(DMI_BIOS_VERSION, 1152 "ASUS PR-DLS ACPI BIOS Revision 1010"), 1153 DMI_MATCH(DMI_BIOS_DATE, "03/21/2003") 1154 }, 1155 }, 1156 { 1157 .callback = disable_acpi_pci, 1158 .ident = "Acer TravelMate 36x Laptop", 1159 .matches = { 1160 DMI_MATCH(DMI_SYS_VENDOR, "Acer"), 1161 DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"), 1162 }, 1163 }, 1164 {} 1165 }; 1166 1167 #endif /* __i386__ */ 1168 1169 /* 1170 * acpi_boot_table_init() and acpi_boot_init() 1171 * called from setup_arch(), always. 1172 * 1. checksums all tables 1173 * 2. enumerates lapics 1174 * 3. enumerates io-apics 1175 * 1176 * acpi_table_init() is separate to allow reading SRAT without 1177 * other side effects. 1178 * 1179 * side effects of acpi_boot_init: 1180 * acpi_lapic = 1 if LAPIC found 1181 * acpi_ioapic = 1 if IOAPIC found 1182 * if (acpi_lapic && acpi_ioapic) smp_found_config = 1; 1183 * if acpi_blacklisted() acpi_disabled = 1; 1184 * acpi_irq_model=... 1185 * ... 1186 * 1187 * return value: (currently ignored) 1188 * 0: success 1189 * !0: failure 1190 */ 1191 1192 int __init acpi_boot_table_init(void) 1193 { 1194 int error; 1195 1196 #ifdef __i386__ 1197 dmi_check_system(acpi_dmi_table); 1198 #endif 1199 1200 /* 1201 * If acpi_disabled, bail out 1202 * One exception: acpi=ht continues far enough to enumerate LAPICs 1203 */ 1204 if (acpi_disabled && !acpi_ht) 1205 return 1; 1206 1207 /* 1208 * Initialize the ACPI boot-time table parser. 1209 */ 1210 error = acpi_table_init(); 1211 if (error) { 1212 disable_acpi(); 1213 return error; 1214 } 1215 1216 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf); 1217 1218 /* 1219 * blacklist may disable ACPI entirely 1220 */ 1221 error = acpi_blacklisted(); 1222 if (error) { 1223 if (acpi_force) { 1224 printk(KERN_WARNING PREFIX "acpi=force override\n"); 1225 } else { 1226 printk(KERN_WARNING PREFIX "Disabling ACPI support\n"); 1227 disable_acpi(); 1228 return error; 1229 } 1230 } 1231 1232 return 0; 1233 } 1234 1235 int __init acpi_boot_init(void) 1236 { 1237 /* 1238 * If acpi_disabled, bail out 1239 * One exception: acpi=ht continues far enough to enumerate LAPICs 1240 */ 1241 if (acpi_disabled && !acpi_ht) 1242 return 1; 1243 1244 acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf); 1245 1246 /* 1247 * set sci_int and PM timer address 1248 */ 1249 acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt); 1250 1251 /* 1252 * Process the Multiple APIC Description Table (MADT), if present 1253 */ 1254 acpi_process_madt(); 1255 1256 acpi_table_parse(ACPI_SIG_HPET, acpi_parse_hpet); 1257 1258 return 0; 1259 } 1260 1261 static int __init parse_acpi(char *arg) 1262 { 1263 if (!arg) 1264 return -EINVAL; 1265 1266 /* "acpi=off" disables both ACPI table parsing and interpreter */ 1267 if (strcmp(arg, "off") == 0) { 1268 disable_acpi(); 1269 } 1270 /* acpi=force to over-ride black-list */ 1271 else if (strcmp(arg, "force") == 0) { 1272 acpi_force = 1; 1273 acpi_ht = 1; 1274 acpi_disabled = 0; 1275 } 1276 /* acpi=strict disables out-of-spec workarounds */ 1277 else if (strcmp(arg, "strict") == 0) { 1278 acpi_strict = 1; 1279 } 1280 /* Limit ACPI just to boot-time to enable HT */ 1281 else if (strcmp(arg, "ht") == 0) { 1282 if (!acpi_force) 1283 disable_acpi(); 1284 acpi_ht = 1; 1285 } 1286 /* "acpi=noirq" disables ACPI interrupt routing */ 1287 else if (strcmp(arg, "noirq") == 0) { 1288 acpi_noirq_set(); 1289 } else { 1290 /* Core will printk when we return error. */ 1291 return -EINVAL; 1292 } 1293 return 0; 1294 } 1295 early_param("acpi", parse_acpi); 1296 1297 /* FIXME: Using pci= for an ACPI parameter is a travesty. */ 1298 static int __init parse_pci(char *arg) 1299 { 1300 if (arg && strcmp(arg, "noacpi") == 0) 1301 acpi_disable_pci(); 1302 return 0; 1303 } 1304 early_param("pci", parse_pci); 1305 1306 #ifdef CONFIG_X86_IO_APIC 1307 static int __init parse_acpi_skip_timer_override(char *arg) 1308 { 1309 acpi_skip_timer_override = 1; 1310 return 0; 1311 } 1312 early_param("acpi_skip_timer_override", parse_acpi_skip_timer_override); 1313 1314 static int __init parse_acpi_use_timer_override(char *arg) 1315 { 1316 acpi_use_timer_override = 1; 1317 return 0; 1318 } 1319 early_param("acpi_use_timer_override", parse_acpi_use_timer_override); 1320 #endif /* CONFIG_X86_IO_APIC */ 1321 1322 static int __init setup_acpi_sci(char *s) 1323 { 1324 if (!s) 1325 return -EINVAL; 1326 if (!strcmp(s, "edge")) 1327 acpi_sci_flags = ACPI_MADT_TRIGGER_EDGE | 1328 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK); 1329 else if (!strcmp(s, "level")) 1330 acpi_sci_flags = ACPI_MADT_TRIGGER_LEVEL | 1331 (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK); 1332 else if (!strcmp(s, "high")) 1333 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_HIGH | 1334 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK); 1335 else if (!strcmp(s, "low")) 1336 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_LOW | 1337 (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK); 1338 else 1339 return -EINVAL; 1340 return 0; 1341 } 1342 early_param("acpi_sci", setup_acpi_sci); 1343 1344 int __acpi_acquire_global_lock(unsigned int *lock) 1345 { 1346 unsigned int old, new, val; 1347 do { 1348 old = *lock; 1349 new = (((old & ~0x3) + 2) + ((old >> 1) & 0x1)); 1350 val = cmpxchg(lock, old, new); 1351 } while (unlikely (val != old)); 1352 return (new < 3) ? -1 : 0; 1353 } 1354 1355 int __acpi_release_global_lock(unsigned int *lock) 1356 { 1357 unsigned int old, new, val; 1358 do { 1359 old = *lock; 1360 new = old & ~0x3; 1361 val = cmpxchg(lock, old, new); 1362 } while (unlikely (val != old)); 1363 return old & 0x1; 1364 } 1365