arch/x86/kernel/acpi/boot.c

   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/slab.h>
  35 #include <linux/bootmem.h>
  36 #include <linux/ioport.h>
  37 #include <linux/pci.h>
  38
  39 #include <asm/pci_x86.h>
  40 #include <asm/pgtable.h>
  41 #include <asm/io_apic.h>
  42 #include <asm/apic.h>
  43 #include <asm/io.h>
  44 #include <asm/mpspec.h>
  45 #include <asm/smp.h>
  46
  47 static int __initdata acpi_force = 0;
  48 u32 acpi_rsdt_forced;
  49 int acpi_disabled;
  50 EXPORT_SYMBOL(acpi_disabled);
  51
  52 #ifdef  CONFIG_X86_64
  53 # include <asm/proto.h>
  54 # include <asm/numa_64.h>
  55 #endif                          /* X86 */
  56
  57 #define BAD_MADT_ENTRY(entry, end) (                                        \
  58                 (!entry) || (unsigned long)entry + sizeof(*entry) > end ||  \
  59                 ((struct acpi_subtable_header *)entry)->length < sizeof(*entry))
  60
  61 #define PREFIX                  "ACPI: "
  62
  63 int acpi_noirq;                         /* skip ACPI IRQ initialization */
  64 int acpi_pci_disabled;          /* skip ACPI PCI scan and IRQ initialization */
  65 EXPORT_SYMBOL(acpi_pci_disabled);
  66
  67 int acpi_lapic;
  68 int acpi_ioapic;
  69 int acpi_strict;
  70
  71 u8 acpi_sci_flags __initdata;
  72 int acpi_sci_override_gsi __initdata;
  73 int acpi_skip_timer_override __initdata;
  74 int acpi_use_timer_override __initdata;
  75 int acpi_fix_pin2_polarity __initdata;
  76
  77 #ifdef CONFIG_X86_LOCAL_APIC
  78 static u64 acpi_lapic_addr __initdata = APIC_DEFAULT_PHYS_BASE;
  79 #endif
  80
  81 #ifndef __HAVE_ARCH_CMPXCHG
  82 #warning ACPI uses CMPXCHG, i486 and later hardware
  83 #endif
  84
  85 /* --------------------------------------------------------------------------
  86                               Boot-time Configuration
  87    -------------------------------------------------------------------------- */
  88
  89 /*
  90  * The default interrupt routing model is PIC (8259).  This gets
  91  * overridden if IOAPICs are enumerated (below).
  92  */
  93 enum acpi_irq_model_id acpi_irq_model = ACPI_IRQ_MODEL_PIC;
  94
  95
  96 /*
  97  * ISA irqs by default are the first 16 gsis but can be
  98  * any gsi as specified by an interrupt source override.
  99  */
 100 static u32 isa_irq_to_gsi[NR_IRQS_LEGACY] __read_mostly = {
 101         0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15
 102 };
 103
 104 static unsigned int gsi_to_irq(unsigned int gsi)
 105 {
 106         unsigned int irq = gsi + NR_IRQS_LEGACY;
 107         unsigned int i;
 108
 109         for (i = 0; i < NR_IRQS_LEGACY; i++) {
 110                 if (isa_irq_to_gsi[i] == gsi) {
 111                         return i;
 112                 }
 113         }
 114
 115         /* Provide an identity mapping of gsi == irq
 116          * except on truly weird platforms that have
 117          * non isa irqs in the first 16 gsis.
 118          */
 119         if (gsi >= NR_IRQS_LEGACY)
 120                 irq = gsi;
 121         else
 122                 irq = gsi_top + gsi;
 123
 124         return irq;
 125 }
 126
 127 static u32 irq_to_gsi(int irq)
 128 {
 129         unsigned int gsi;
 130
 131         if (irq < NR_IRQS_LEGACY)
 132                 gsi = isa_irq_to_gsi[irq];
 133         else if (irq < gsi_top)
 134                 gsi = irq;
 135         else if (irq < (gsi_top + NR_IRQS_LEGACY))
 136                 gsi = irq - gsi_top;
 137         else
 138                 gsi = 0xffffffff;
 139
 140         return gsi;
 141 }
 142
 143 /*
 144  * Temporarily use the virtual area starting from FIX_IO_APIC_BASE_END,
 145  * to map the target physical address. The problem is that set_fixmap()
 146  * provides a single page, and it is possible that the page is not
 147  * sufficient.
 148  * By using this area, we can map up to MAX_IO_APICS pages temporarily,
 149  * i.e. until the next __va_range() call.
 150  *
 151  * Important Safety Note:  The fixed I/O APIC page numbers are *subtracted*
 152  * from the fixed base.  That's why we start at FIX_IO_APIC_BASE_END and
 153  * count idx down while incrementing the phys address.
 154  */
 155 char *__init __acpi_map_table(unsigned long phys, unsigned long size)
 156 {
 157
 158         if (!phys || !size)
 159                 return NULL;
 160
 161         return early_ioremap(phys, size);
 162 }
 163 void __init __acpi_unmap_table(char *map, unsigned long size)
 164 {
 165         if (!map || !size)
 166                 return;
 167
 168         early_iounmap(map, size);
 169 }
 170
 171 #ifdef CONFIG_X86_LOCAL_APIC
 172 static int __init acpi_parse_madt(struct acpi_table_header *table)
 173 {
 174         struct acpi_table_madt *madt = NULL;
 175
 176         if (!cpu_has_apic)
 177                 return -EINVAL;
 178
 179         madt = (struct acpi_table_madt *)table;
 180         if (!madt) {
 181                 printk(KERN_WARNING PREFIX "Unable to map MADT\n");
 182                 return -ENODEV;
 183         }
 184
 185         if (madt->address) {
 186                 acpi_lapic_addr = (u64) madt->address;
 187
 188                 printk(KERN_DEBUG PREFIX "Local APIC address 0x%08x\n",
 189                        madt->address);
 190         }
 191
 192         default_acpi_madt_oem_check(madt->header.oem_id,
 193                                     madt->header.oem_table_id);
 194
 195         return 0;
 196 }
 197
 198 static void __cpuinit acpi_register_lapic(int id, u8 enabled)
 199 {
 200         unsigned int ver = 0;
 201
 202         if (id >= (MAX_LOCAL_APIC-1)) {
 203                 printk(KERN_INFO PREFIX "skipped apicid that is too big\n");
 204                 return;
 205         }
 206
 207         if (!enabled) {
 208                 ++disabled_cpus;
 209                 return;
 210         }
 211
 212         if (boot_cpu_physical_apicid != -1U)
 213                 ver = apic_version[boot_cpu_physical_apicid];
 214
 215         generic_processor_info(id, ver);
 216 }
 217
 218 static int __init
 219 acpi_parse_x2apic(struct acpi_subtable_header *header, const unsigned long end)
 220 {
 221         struct acpi_madt_local_x2apic *processor = NULL;
 222
 223         processor = (struct acpi_madt_local_x2apic *)header;
 224
 225         if (BAD_MADT_ENTRY(processor, end))
 226                 return -EINVAL;
 227
 228         acpi_table_print_madt_entry(header);
 229
 230 #ifdef CONFIG_X86_X2APIC
 231         /*
 232          * We need to register disabled CPU as well to permit
 233          * counting disabled CPUs. This allows us to size
 234          * cpus_possible_map more accurately, to permit
 235          * to not preallocating memory for all NR_CPUS
 236          * when we use CPU hotplug.
 237          */
 238         acpi_register_lapic(processor->local_apic_id,   /* APIC ID */
 239                             processor->lapic_flags & ACPI_MADT_ENABLED);
 240 #else
 241         printk(KERN_WARNING PREFIX "x2apic entry ignored\n");
 242 #endif
 243
 244         return 0;
 245 }
 246
 247 static int __init
 248 acpi_parse_lapic(struct acpi_subtable_header * header, const unsigned long end)
 249 {
 250         struct acpi_madt_local_apic *processor = NULL;
 251
 252         processor = (struct acpi_madt_local_apic *)header;
 253
 254         if (BAD_MADT_ENTRY(processor, end))
 255                 return -EINVAL;
 256
 257         acpi_table_print_madt_entry(header);
 258
 259         /*
 260          * We need to register disabled CPU as well to permit
 261          * counting disabled CPUs. This allows us to size
 262          * cpus_possible_map more accurately, to permit
 263          * to not preallocating memory for all NR_CPUS
 264          * when we use CPU hotplug.
 265          */
 266         acpi_register_lapic(processor->id,      /* APIC ID */
 267                             processor->lapic_flags & ACPI_MADT_ENABLED);
 268
 269         return 0;
 270 }
 271
 272 static int __init
 273 acpi_parse_sapic(struct acpi_subtable_header *header, const unsigned long end)
 274 {
 275         struct acpi_madt_local_sapic *processor = NULL;
 276
 277         processor = (struct acpi_madt_local_sapic *)header;
 278
 279         if (BAD_MADT_ENTRY(processor, end))
 280                 return -EINVAL;
 281
 282         acpi_table_print_madt_entry(header);
 283
 284         acpi_register_lapic((processor->id << 8) | processor->eid,/* APIC ID */
 285                             processor->lapic_flags & ACPI_MADT_ENABLED);
 286
 287         return 0;
 288 }
 289
 290 static int __init
 291 acpi_parse_lapic_addr_ovr(struct acpi_subtable_header * header,
 292                           const unsigned long end)
 293 {
 294         struct acpi_madt_local_apic_override *lapic_addr_ovr = NULL;
 295
 296         lapic_addr_ovr = (struct acpi_madt_local_apic_override *)header;
 297
 298         if (BAD_MADT_ENTRY(lapic_addr_ovr, end))
 299                 return -EINVAL;
 300
 301         acpi_lapic_addr = lapic_addr_ovr->address;
 302
 303         return 0;
 304 }
 305
 306 static int __init
 307 acpi_parse_x2apic_nmi(struct acpi_subtable_header *header,
 308                       const unsigned long end)
 309 {
 310         struct acpi_madt_local_x2apic_nmi *x2apic_nmi = NULL;
 311
 312         x2apic_nmi = (struct acpi_madt_local_x2apic_nmi *)header;
 313
 314         if (BAD_MADT_ENTRY(x2apic_nmi, end))
 315                 return -EINVAL;
 316
 317         acpi_table_print_madt_entry(header);
 318
 319         if (x2apic_nmi->lint != 1)
 320                 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n");
 321
 322         return 0;
 323 }
 324
 325 static int __init
 326 acpi_parse_lapic_nmi(struct acpi_subtable_header * header, const unsigned long end)
 327 {
 328         struct acpi_madt_local_apic_nmi *lapic_nmi = NULL;
 329
 330         lapic_nmi = (struct acpi_madt_local_apic_nmi *)header;
 331
 332         if (BAD_MADT_ENTRY(lapic_nmi, end))
 333                 return -EINVAL;
 334
 335         acpi_table_print_madt_entry(header);
 336
 337         if (lapic_nmi->lint != 1)
 338                 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n");
 339
 340         return 0;
 341 }
 342
 343 #endif                          /*CONFIG_X86_LOCAL_APIC */
 344
 345 #ifdef CONFIG_X86_IO_APIC
 346
 347 static int __init
 348 acpi_parse_ioapic(struct acpi_subtable_header * header, const unsigned long end)
 349 {
 350         struct acpi_madt_io_apic *ioapic = NULL;
 351
 352         ioapic = (struct acpi_madt_io_apic *)header;
 353
 354         if (BAD_MADT_ENTRY(ioapic, end))
 355                 return -EINVAL;
 356
 357         acpi_table_print_madt_entry(header);
 358
 359         mp_register_ioapic(ioapic->id,
 360                            ioapic->address, ioapic->global_irq_base);
 361
 362         return 0;
 363 }
 364
 365 /*
 366  * Parse Interrupt Source Override for the ACPI SCI
 367  */
 368 static void __init acpi_sci_ioapic_setup(u8 bus_irq, u16 polarity, u16 trigger, u32 gsi)
 369 {
 370         if (trigger == 0)       /* compatible SCI trigger is level */
 371                 trigger = 3;
 372
 373         if (polarity == 0)      /* compatible SCI polarity is low */
 374                 polarity = 3;
 375
 376         /* Command-line over-ride via acpi_sci= */
 377         if (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK)
 378                 trigger = (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2;
 379
 380         if (acpi_sci_flags & ACPI_MADT_POLARITY_MASK)
 381                 polarity = acpi_sci_flags & ACPI_MADT_POLARITY_MASK;
 382
 383         /*
 384          * mp_config_acpi_legacy_irqs() already setup IRQs < 16
 385          * If GSI is < 16, this will update its flags,
 386          * else it will create a new mp_irqs[] entry.
 387          */
 388         mp_override_legacy_irq(bus_irq, polarity, trigger, gsi);
 389
 390         /*
 391          * stash over-ride to indicate we've been here
 392          * and for later update of acpi_gbl_FADT
 393          */
 394         acpi_sci_override_gsi = gsi;
 395         return;
 396 }
 397
 398 static int __init
 399 acpi_parse_int_src_ovr(struct acpi_subtable_header * header,
 400                        const unsigned long end)
 401 {
 402         struct acpi_madt_interrupt_override *intsrc = NULL;
 403
 404         intsrc = (struct acpi_madt_interrupt_override *)header;
 405
 406         if (BAD_MADT_ENTRY(intsrc, end))
 407                 return -EINVAL;
 408
 409         acpi_table_print_madt_entry(header);
 410
 411         if (intsrc->source_irq == acpi_gbl_FADT.sci_interrupt) {
 412                 acpi_sci_ioapic_setup(intsrc->source_irq,
 413                                       intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
 414                                       (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2,
 415                                       intsrc->global_irq);
 416                 return 0;
 417         }
 418
 419         if (intsrc->source_irq == 0 && intsrc->global_irq == 2) {
 420                 if (acpi_skip_timer_override) {
 421                         printk(PREFIX "BIOS IRQ0 pin2 override ignored.\n");
 422                         return 0;
 423                 }
 424                 if (acpi_fix_pin2_polarity && (intsrc->inti_flags & ACPI_MADT_POLARITY_MASK)) {
 425                         intsrc->inti_flags &= ~ACPI_MADT_POLARITY_MASK;
 426                         printk(PREFIX "BIOS IRQ0 pin2 override: forcing polarity to high active.\n");
 427                 }
 428         }
 429
 430         mp_override_legacy_irq(intsrc->source_irq,
 431                                 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
 432                                 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2,
 433                                 intsrc->global_irq);
 434
 435         return 0;
 436 }
 437
 438 static int __init
 439 acpi_parse_nmi_src(struct acpi_subtable_header * header, const unsigned long end)
 440 {
 441         struct acpi_madt_nmi_source *nmi_src = NULL;
 442
 443         nmi_src = (struct acpi_madt_nmi_source *)header;
 444
 445         if (BAD_MADT_ENTRY(nmi_src, end))
 446                 return -EINVAL;
 447
 448         acpi_table_print_madt_entry(header);
 449
 450         /* TBD: Support nimsrc entries? */
 451
 452         return 0;
 453 }
 454
 455 #endif                          /* CONFIG_X86_IO_APIC */
 456
 457 /*
 458  * acpi_pic_sci_set_trigger()
 459  *
 460  * use ELCR to set PIC-mode trigger type for SCI
 461  *
 462  * If a PIC-mode SCI is not recognized or gives spurious IRQ7's
 463  * it may require Edge Trigger -- use "acpi_sci=edge"
 464  *
 465  * Port 0x4d0-4d1 are ECLR1 and ECLR2, the Edge/Level Control Registers
 466  * for the 8259 PIC.  bit[n] = 1 means irq[n] is Level, otherwise Edge.
 467  * ECLR1 is IRQs 0-7 (IRQ 0, 1, 2 must be 0)
 468  * ECLR2 is IRQs 8-15 (IRQ 8, 13 must be 0)
 469  */
 470
 471 void __init acpi_pic_sci_set_trigger(unsigned int irq, u16 trigger)
 472 {
 473         unsigned int mask = 1 << irq;
 474         unsigned int old, new;
 475
 476         /* Real old ELCR mask */
 477         old = inb(0x4d0) | (inb(0x4d1) << 8);
 478
 479         /*
 480          * If we use ACPI to set PCI IRQs, then we should clear ELCR
 481          * since we will set it correctly as we enable the PCI irq
 482          * routing.
 483          */
 484         new = acpi_noirq ? old : 0;
 485
 486         /*
 487          * Update SCI information in the ELCR, it isn't in the PCI
 488          * routing tables..
 489          */
 490         switch (trigger) {
 491         case 1:         /* Edge - clear */
 492                 new &= ~mask;
 493                 break;
 494         case 3:         /* Level - set */
 495                 new |= mask;
 496                 break;
 497         }
 498
 499         if (old == new)
 500                 return;
 501
 502         printk(PREFIX "setting ELCR to %04x (from %04x)\n", new, old);
 503         outb(new, 0x4d0);
 504         outb(new >> 8, 0x4d1);
 505 }
 506
 507 int acpi_gsi_to_irq(u32 gsi, unsigned int *irq)
 508 {
 509         *irq = gsi_to_irq(gsi);
 510
 511 #ifdef CONFIG_X86_IO_APIC
 512         if (acpi_irq_model == ACPI_IRQ_MODEL_IOAPIC)
 513                 setup_IO_APIC_irq_extra(gsi);
 514 #endif
 515
 516         return 0;
 517 }
 518 EXPORT_SYMBOL_GPL(acpi_gsi_to_irq);
 519
 520 int acpi_isa_irq_to_gsi(unsigned isa_irq, u32 *gsi)
 521 {
 522         if (isa_irq >= 16)
 523                 return -1;
 524         *gsi = irq_to_gsi(isa_irq);
 525         return 0;
 526 }
 527
 528 static int acpi_register_gsi_pic(struct device *dev, u32 gsi,
 529                                  int trigger, int polarity)
 530 {
 531 #ifdef CONFIG_PCI
 532         /*
 533          * Make sure all (legacy) PCI IRQs are set as level-triggered.
 534          */
 535         if (trigger == ACPI_LEVEL_SENSITIVE)
 536                 eisa_set_level_irq(gsi);
 537 #endif
 538
 539         return gsi;
 540 }
 541
 542 static int acpi_register_gsi_ioapic(struct device *dev, u32 gsi,
 543                                     int trigger, int polarity)
 544 {
 545 #ifdef CONFIG_X86_IO_APIC
 546         gsi = mp_register_gsi(dev, gsi, trigger, polarity);
 547 #endif
 548
 549         return gsi;
 550 }
 551
 552 int (*__acpi_register_gsi)(struct device *dev, u32 gsi,
 553                            int trigger, int polarity) = acpi_register_gsi_pic;
 554
 555 /*
 556  * success: return IRQ number (>=0)
 557  * failure: return < 0
 558  */
 559 int acpi_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity)
 560 {
 561         unsigned int irq;
 562         unsigned int plat_gsi = gsi;
 563
 564         plat_gsi = (*__acpi_register_gsi)(dev, gsi, trigger, polarity);
 565         irq = gsi_to_irq(plat_gsi);
 566
 567         return irq;
 568 }
 569
 570 void __init acpi_set_irq_model_pic(void)
 571 {
 572         acpi_irq_model = ACPI_IRQ_MODEL_PIC;
 573         __acpi_register_gsi = acpi_register_gsi_pic;
 574         acpi_ioapic = 0;
 575 }
 576
 577 void __init acpi_set_irq_model_ioapic(void)
 578 {
 579         acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC;
 580         __acpi_register_gsi = acpi_register_gsi_ioapic;
 581         acpi_ioapic = 1;
 582 }
 583
 584 /*
 585  *  ACPI based hotplug support for CPU
 586  */
 587 #ifdef CONFIG_ACPI_HOTPLUG_CPU
 588 #include <acpi/processor.h>
 589
 590 static void acpi_map_cpu2node(acpi_handle handle, int cpu, int physid)
 591 {
 592 #ifdef CONFIG_ACPI_NUMA
 593         int nid;
 594
 595         nid = acpi_get_node(handle);
 596         if (nid == -1 || !node_online(nid))
 597                 return;
 598 #ifdef CONFIG_X86_64
 599         apicid_to_node[physid] = nid;
 600         numa_set_node(cpu, nid);
 601 #else /* CONFIG_X86_32 */
 602         apicid_2_node[physid] = nid;
 603         cpu_to_node_map[cpu] = nid;
 604 #endif
 605
 606 #endif
 607 }
 608
 609 static int __cpuinit _acpi_map_lsapic(acpi_handle handle, int *pcpu)
 610 {
 611         struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
 612         union acpi_object *obj;
 613         struct acpi_madt_local_apic *lapic;
 614         cpumask_var_t tmp_map, new_map;
 615         u8 physid;
 616         int cpu;
 617         int retval = -ENOMEM;
 618
 619         if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer)))
 620                 return -EINVAL;
 621
 622         if (!buffer.length || !buffer.pointer)
 623                 return -EINVAL;
 624
 625         obj = buffer.pointer;
 626         if (obj->type != ACPI_TYPE_BUFFER ||
 627             obj->buffer.length < sizeof(*lapic)) {
 628                 kfree(buffer.pointer);
 629                 return -EINVAL;
 630         }
 631
 632         lapic = (struct acpi_madt_local_apic *)obj->buffer.pointer;
 633
 634         if (lapic->header.type != ACPI_MADT_TYPE_LOCAL_APIC ||
 635             !(lapic->lapic_flags & ACPI_MADT_ENABLED)) {
 636                 kfree(buffer.pointer);
 637                 return -EINVAL;
 638         }
 639
 640         physid = lapic->id;
 641
 642         kfree(buffer.pointer);
 643         buffer.length = ACPI_ALLOCATE_BUFFER;
 644         buffer.pointer = NULL;
 645
 646         if (!alloc_cpumask_var(&tmp_map, GFP_KERNEL))
 647                 goto out;
 648
 649         if (!alloc_cpumask_var(&new_map, GFP_KERNEL))
 650                 goto free_tmp_map;
 651
 652         cpumask_copy(tmp_map, cpu_present_mask);
 653         acpi_register_lapic(physid, lapic->lapic_flags & ACPI_MADT_ENABLED);
 654
 655         /*
 656          * If mp_register_lapic successfully generates a new logical cpu
 657          * number, then the following will get us exactly what was mapped
 658          */
 659         cpumask_andnot(new_map, cpu_present_mask, tmp_map);
 660         if (cpumask_empty(new_map)) {
 661                 printk ("Unable to map lapic to logical cpu number\n");
 662                 retval = -EINVAL;
 663                 goto free_new_map;
 664         }
 665
 666         acpi_processor_set_pdc(handle);
 667
 668         cpu = cpumask_first(new_map);
 669         acpi_map_cpu2node(handle, cpu, physid);
 670
 671         *pcpu = cpu;
 672         retval = 0;
 673
 674 free_new_map:
 675         free_cpumask_var(new_map);
 676 free_tmp_map:
 677         free_cpumask_var(tmp_map);
 678 out:
 679         return retval;
 680 }
 681
 682 /* wrapper to silence section mismatch warning */
 683 int __ref acpi_map_lsapic(acpi_handle handle, int *pcpu)
 684 {
 685         return _acpi_map_lsapic(handle, pcpu);
 686 }
 687 EXPORT_SYMBOL(acpi_map_lsapic);
 688
 689 int acpi_unmap_lsapic(int cpu)
 690 {
 691         per_cpu(x86_cpu_to_apicid, cpu) = -1;
 692         set_cpu_present(cpu, false);
 693         num_processors--;
 694
 695         return (0);
 696 }
 697
 698 EXPORT_SYMBOL(acpi_unmap_lsapic);
 699 #endif                          /* CONFIG_ACPI_HOTPLUG_CPU */
 700
 701 int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base)
 702 {
 703         /* TBD */
 704         return -EINVAL;
 705 }
 706
 707 EXPORT_SYMBOL(acpi_register_ioapic);
 708
 709 int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base)
 710 {
 711         /* TBD */
 712         return -EINVAL;
 713 }
 714
 715 EXPORT_SYMBOL(acpi_unregister_ioapic);
 716
 717 static int __init acpi_parse_sbf(struct acpi_table_header *table)
 718 {
 719         struct acpi_table_boot *sb;
 720
 721         sb = (struct acpi_table_boot *)table;
 722         if (!sb) {
 723                 printk(KERN_WARNING PREFIX "Unable to map SBF\n");
 724                 return -ENODEV;
 725         }
 726
 727         sbf_port = sb->cmos_index;      /* Save CMOS port */
 728
 729         return 0;
 730 }
 731
 732 #ifdef CONFIG_HPET_TIMER
 733 #include <asm/hpet.h>
 734
 735 static struct __initdata resource *hpet_res;
 736
 737 static int __init acpi_parse_hpet(struct acpi_table_header *table)
 738 {
 739         struct acpi_table_hpet *hpet_tbl;
 740
 741         hpet_tbl = (struct acpi_table_hpet *)table;
 742         if (!hpet_tbl) {
 743                 printk(KERN_WARNING PREFIX "Unable to map HPET\n");
 744                 return -ENODEV;
 745         }
 746
 747         if (hpet_tbl->address.space_id != ACPI_SPACE_MEM) {
 748                 printk(KERN_WARNING PREFIX "HPET timers must be located in "
 749                        "memory.\n");
 750                 return -1;
 751         }
 752
 753         hpet_address = hpet_tbl->address.address;
 754         hpet_blockid = hpet_tbl->sequence;
 755
 756         /*
 757          * Some broken BIOSes advertise HPET at 0x0. We really do not
 758          * want to allocate a resource there.
 759          */
 760         if (!hpet_address) {
 761                 printk(KERN_WARNING PREFIX
 762                        "HPET id: %#x base: %#lx is invalid\n",
 763                        hpet_tbl->id, hpet_address);
 764                 return 0;
 765         }
 766 #ifdef CONFIG_X86_64
 767         /*
 768          * Some even more broken BIOSes advertise HPET at
 769          * 0xfed0000000000000 instead of 0xfed00000. Fix it up and add
 770          * some noise:
 771          */
 772         if (hpet_address == 0xfed0000000000000UL) {
 773                 if (!hpet_force_user) {
 774                         printk(KERN_WARNING PREFIX "HPET id: %#x "
 775                                "base: 0xfed0000000000000 is bogus\n "
 776                                "try hpet=force on the kernel command line to "
 777                                "fix it up to 0xfed00000.\n", hpet_tbl->id);
 778                         hpet_address = 0;
 779                         return 0;
 780                 }
 781                 printk(KERN_WARNING PREFIX
 782                        "HPET id: %#x base: 0xfed0000000000000 fixed up "
 783                        "to 0xfed00000.\n", hpet_tbl->id);
 784                 hpet_address >>= 32;
 785         }
 786 #endif
 787         printk(KERN_INFO PREFIX "HPET id: %#x base: %#lx\n",
 788                hpet_tbl->id, hpet_address);
 789
 790         /*
 791          * Allocate and initialize the HPET firmware resource for adding into
 792          * the resource tree during the lateinit timeframe.
 793          */
 794 #define HPET_RESOURCE_NAME_SIZE 9
 795         hpet_res = alloc_bootmem(sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE);
 796
 797         hpet_res->name = (void *)&hpet_res[1];
 798         hpet_res->flags = IORESOURCE_MEM;
 799         snprintf((char *)hpet_res->name, HPET_RESOURCE_NAME_SIZE, "HPET %u",
 800                  hpet_tbl->sequence);
 801
 802         hpet_res->start = hpet_address;
 803         hpet_res->end = hpet_address + (1 * 1024) - 1;
 804
 805         return 0;
 806 }
 807
 808 /*
 809  * hpet_insert_resource inserts the HPET resources used into the resource
 810  * tree.
 811  */
 812 static __init int hpet_insert_resource(void)
 813 {
 814         if (!hpet_res)
 815                 return 1;
 816
 817         return insert_resource(&iomem_resource, hpet_res);
 818 }
 819
 820 late_initcall(hpet_insert_resource);
 821
 822 #else
 823 #define acpi_parse_hpet NULL
 824 #endif
 825
 826 static int __init acpi_parse_fadt(struct acpi_table_header *table)
 827 {
 828
 829 #ifdef CONFIG_X86_PM_TIMER
 830         /* detect the location of the ACPI PM Timer */
 831         if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID) {
 832                 /* FADT rev. 2 */
 833                 if (acpi_gbl_FADT.xpm_timer_block.space_id !=
 834                     ACPI_ADR_SPACE_SYSTEM_IO)
 835                         return 0;
 836
 837                 pmtmr_ioport = acpi_gbl_FADT.xpm_timer_block.address;
 838                 /*
 839                  * "X" fields are optional extensions to the original V1.0
 840                  * fields, so we must selectively expand V1.0 fields if the
 841                  * corresponding X field is zero.
 842                  */
 843                 if (!pmtmr_ioport)
 844                         pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
 845         } else {
 846                 /* FADT rev. 1 */
 847                 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
 848         }
 849         if (pmtmr_ioport)
 850                 printk(KERN_INFO PREFIX "PM-Timer IO Port: %#x\n",
 851                        pmtmr_ioport);
 852 #endif
 853         return 0;
 854 }
 855
 856 #ifdef  CONFIG_X86_LOCAL_APIC
 857 /*
 858  * Parse LAPIC entries in MADT
 859  * returns 0 on success, < 0 on error
 860  */
 861
 862 static int __init early_acpi_parse_madt_lapic_addr_ovr(void)
 863 {
 864         int count;
 865
 866         if (!cpu_has_apic)
 867                 return -ENODEV;
 868
 869         /*
 870          * Note that the LAPIC address is obtained from the MADT (32-bit value)
 871          * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value).
 872          */
 873
 874         count =
 875             acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
 876                                   acpi_parse_lapic_addr_ovr, 0);
 877         if (count < 0) {
 878                 printk(KERN_ERR PREFIX
 879                        "Error parsing LAPIC address override entry\n");
 880                 return count;
 881         }
 882
 883         register_lapic_address(acpi_lapic_addr);
 884
 885         return count;
 886 }
 887
 888 static int __init acpi_parse_madt_lapic_entries(void)
 889 {
 890         int count;
 891         int x2count = 0;
 892
 893         if (!cpu_has_apic)
 894                 return -ENODEV;
 895
 896         /*
 897          * Note that the LAPIC address is obtained from the MADT (32-bit value)
 898          * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value).
 899          */
 900
 901         count =
 902             acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
 903                                   acpi_parse_lapic_addr_ovr, 0);
 904         if (count < 0) {
 905                 printk(KERN_ERR PREFIX
 906                        "Error parsing LAPIC address override entry\n");
 907                 return count;
 908         }
 909
 910         register_lapic_address(acpi_lapic_addr);
 911
 912         count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC,
 913                                       acpi_parse_sapic, MAX_LOCAL_APIC);
 914
 915         if (!count) {
 916                 x2count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC,
 917                                         acpi_parse_x2apic, MAX_LOCAL_APIC);
 918                 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC,
 919                                         acpi_parse_lapic, MAX_LOCAL_APIC);
 920         }
 921         if (!count && !x2count) {
 922                 printk(KERN_ERR PREFIX "No LAPIC entries present\n");
 923                 /* TBD: Cleanup to allow fallback to MPS */
 924                 return -ENODEV;
 925         } else if (count < 0 || x2count < 0) {
 926                 printk(KERN_ERR PREFIX "Error parsing LAPIC entry\n");
 927                 /* TBD: Cleanup to allow fallback to MPS */
 928                 return count;
 929         }
 930
 931         x2count =
 932             acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC_NMI,
 933                                   acpi_parse_x2apic_nmi, 0);
 934         count =
 935             acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI, acpi_parse_lapic_nmi, 0);
 936         if (count < 0 || x2count < 0) {
 937                 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n");
 938                 /* TBD: Cleanup to allow fallback to MPS */
 939                 return count;
 940         }
 941         return 0;
 942 }
 943 #endif                          /* CONFIG_X86_LOCAL_APIC */
 944
 945 #ifdef  CONFIG_X86_IO_APIC
 946 #define MP_ISA_BUS              0
 947
 948 #ifdef CONFIG_X86_ES7000
 949 extern int es7000_plat;
 950 #endif
 951
 952 void __init mp_override_legacy_irq(u8 bus_irq, u8 polarity, u8 trigger, u32 gsi)
 953 {
 954         int ioapic;
 955         int pin;
 956         struct mpc_intsrc mp_irq;
 957
 958         /*
 959          * Convert 'gsi' to 'ioapic.pin'.
 960          */
 961         ioapic = mp_find_ioapic(gsi);
 962         if (ioapic < 0)
 963                 return;
 964         pin = mp_find_ioapic_pin(ioapic, gsi);
 965
 966         /*
 967          * TBD: This check is for faulty timer entries, where the override
 968          *      erroneously sets the trigger to level, resulting in a HUGE
 969          *      increase of timer interrupts!
 970          */
 971         if ((bus_irq == 0) && (trigger == 3))
 972                 trigger = 1;
 973
 974         mp_irq.type = MP_INTSRC;
 975         mp_irq.irqtype = mp_INT;
 976         mp_irq.irqflag = (trigger << 2) | polarity;
 977         mp_irq.srcbus = MP_ISA_BUS;
 978         mp_irq.srcbusirq = bus_irq;     /* IRQ */
 979         mp_irq.dstapic = mp_ioapics[ioapic].apicid; /* APIC ID */
 980         mp_irq.dstirq = pin;    /* INTIN# */
 981
 982         mp_save_irq(&mp_irq);
 983
 984         isa_irq_to_gsi[bus_irq] = gsi;
 985 }
 986
 987 void __init mp_config_acpi_legacy_irqs(void)
 988 {
 989         int i;
 990         struct mpc_intsrc mp_irq;
 991
 992 #if defined (CONFIG_MCA) || defined (CONFIG_EISA)
 993         /*
 994          * Fabricate the legacy ISA bus (bus #31).
 995          */
 996         mp_bus_id_to_type[MP_ISA_BUS] = MP_BUS_ISA;
 997 #endif
 998         set_bit(MP_ISA_BUS, mp_bus_not_pci);
 999         pr_debug("Bus #%d is ISA\n", MP_ISA_BUS);
1000
1001 #ifdef CONFIG_X86_ES7000
1002         /*
1003          * Older generations of ES7000 have no legacy identity mappings
1004          */
1005         if (es7000_plat == 1)
1006                 return;
1007 #endif
1008
1009         /*
1010          * Use the default configuration for the IRQs 0-15.  Unless
1011          * overridden by (MADT) interrupt source override entries.
1012          */
1013         for (i = 0; i < 16; i++) {
1014                 int ioapic, pin;
1015                 unsigned int dstapic;
1016                 int idx;
1017                 u32 gsi;
1018
1019                 /* Locate the gsi that irq i maps to. */
1020                 if (acpi_isa_irq_to_gsi(i, &gsi))
1021                         continue;
1022
1023                 /*
1024                  * Locate the IOAPIC that manages the ISA IRQ.
1025                  */
1026                 ioapic = mp_find_ioapic(gsi);
1027                 if (ioapic < 0)
1028                         continue;
1029                 pin = mp_find_ioapic_pin(ioapic, gsi);
1030                 dstapic = mp_ioapics[ioapic].apicid;
1031
1032                 for (idx = 0; idx < mp_irq_entries; idx++) {
1033                         struct mpc_intsrc *irq = mp_irqs + idx;
1034
1035                         /* Do we already have a mapping for this ISA IRQ? */
1036                         if (irq->srcbus == MP_ISA_BUS && irq->srcbusirq == i)
1037                                 break;
1038
1039                         /* Do we already have a mapping for this IOAPIC pin */
1040                         if (irq->dstapic == dstapic && irq->dstirq == pin)
1041                                 break;
1042                 }
1043
1044                 if (idx != mp_irq_entries) {
1045                         printk(KERN_DEBUG "ACPI: IRQ%d used by override.\n", i);
1046                         continue;       /* IRQ already used */
1047                 }
1048
1049                 mp_irq.type = MP_INTSRC;
1050                 mp_irq.irqflag = 0;     /* Conforming */
1051                 mp_irq.srcbus = MP_ISA_BUS;
1052                 mp_irq.dstapic = dstapic;
1053                 mp_irq.irqtype = mp_INT;
1054                 mp_irq.srcbusirq = i; /* Identity mapped */
1055                 mp_irq.dstirq = pin;
1056
1057                 mp_save_irq(&mp_irq);
1058         }
1059 }
1060
1061 static int mp_config_acpi_gsi(struct device *dev, u32 gsi, int trigger,
1062                         int polarity)
1063 {
1064 #ifdef CONFIG_X86_MPPARSE
1065         struct mpc_intsrc mp_irq;
1066         struct pci_dev *pdev;
1067         unsigned char number;
1068         unsigned int devfn;
1069         int ioapic;
1070         u8 pin;
1071
1072         if (!acpi_ioapic)
1073                 return 0;
1074         if (!dev)
1075                 return 0;
1076         if (dev->bus != &pci_bus_type)
1077                 return 0;
1078
1079         pdev = to_pci_dev(dev);
1080         number = pdev->bus->number;
1081         devfn = pdev->devfn;
1082         pin = pdev->pin;
1083         /* print the entry should happen on mptable identically */
1084         mp_irq.type = MP_INTSRC;
1085         mp_irq.irqtype = mp_INT;
1086         mp_irq.irqflag = (trigger == ACPI_EDGE_SENSITIVE ? 4 : 0x0c) |
1087                                 (polarity == ACPI_ACTIVE_HIGH ? 1 : 3);
1088         mp_irq.srcbus = number;
1089         mp_irq.srcbusirq = (((devfn >> 3) & 0x1f) << 2) | ((pin - 1) & 3);
1090         ioapic = mp_find_ioapic(gsi);
1091         mp_irq.dstapic = mp_ioapics[ioapic].apicid;
1092         mp_irq.dstirq = mp_find_ioapic_pin(ioapic, gsi);
1093
1094         mp_save_irq(&mp_irq);
1095 #endif
1096         return 0;
1097 }
1098
1099 int mp_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity)
1100 {
1101         int ioapic;
1102         int ioapic_pin;
1103         struct io_apic_irq_attr irq_attr;
1104
1105         if (acpi_irq_model != ACPI_IRQ_MODEL_IOAPIC)
1106                 return gsi;
1107
1108         /* Don't set up the ACPI SCI because it's already set up */
1109         if (acpi_gbl_FADT.sci_interrupt == gsi)
1110                 return gsi;
1111
1112         ioapic = mp_find_ioapic(gsi);
1113         if (ioapic < 0) {
1114                 printk(KERN_WARNING "No IOAPIC for GSI %u\n", gsi);
1115                 return gsi;
1116         }
1117
1118         ioapic_pin = mp_find_ioapic_pin(ioapic, gsi);
1119
1120         if (ioapic_pin > MP_MAX_IOAPIC_PIN) {
1121                 printk(KERN_ERR "Invalid reference to IOAPIC pin "
1122                        "%d-%d\n", mp_ioapics[ioapic].apicid,
1123                        ioapic_pin);
1124                 return gsi;
1125         }
1126
1127         if (enable_update_mptable)
1128                 mp_config_acpi_gsi(dev, gsi, trigger, polarity);
1129
1130         set_io_apic_irq_attr(&irq_attr, ioapic, ioapic_pin,
1131                              trigger == ACPI_EDGE_SENSITIVE ? 0 : 1,
1132                              polarity == ACPI_ACTIVE_HIGH ? 0 : 1);
1133         io_apic_set_pci_routing(dev, gsi_to_irq(gsi), &irq_attr);
1134
1135         return gsi;
1136 }
1137
1138 /*
1139  * Parse IOAPIC related entries in MADT
1140  * returns 0 on success, < 0 on error
1141  */
1142 static int __init acpi_parse_madt_ioapic_entries(void)
1143 {
1144         int count;
1145
1146         /*
1147          * ACPI interpreter is required to complete interrupt setup,
1148          * so if it is off, don't enumerate the io-apics with ACPI.
1149          * If MPS is present, it will handle them,
1150          * otherwise the system will stay in PIC mode
1151          */
1152         if (acpi_disabled || acpi_noirq)
1153                 return -ENODEV;
1154
1155         if (!cpu_has_apic)
1156                 return -ENODEV;
1157
1158         /*
1159          * if "noapic" boot option, don't look for IO-APICs
1160          */
1161         if (skip_ioapic_setup) {
1162                 printk(KERN_INFO PREFIX "Skipping IOAPIC probe "
1163                        "due to 'noapic' option.\n");
1164                 return -ENODEV;
1165         }
1166
1167         count =
1168             acpi_table_parse_madt(ACPI_MADT_TYPE_IO_APIC, acpi_parse_ioapic,
1169                                   MAX_IO_APICS);
1170         if (!count) {
1171                 printk(KERN_ERR PREFIX "No IOAPIC entries present\n");
1172                 return -ENODEV;
1173         } else if (count < 0) {
1174                 printk(KERN_ERR PREFIX "Error parsing IOAPIC entry\n");
1175                 return count;
1176         }
1177
1178         count =
1179             acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE, acpi_parse_int_src_ovr,
1180                                   nr_irqs);
1181         if (count < 0) {
1182                 printk(KERN_ERR PREFIX
1183                        "Error parsing interrupt source overrides entry\n");
1184                 /* TBD: Cleanup to allow fallback to MPS */
1185                 return count;
1186         }
1187
1188         /*
1189          * If BIOS did not supply an INT_SRC_OVR for the SCI
1190          * pretend we got one so we can set the SCI flags.
1191          */
1192         if (!acpi_sci_override_gsi)
1193                 acpi_sci_ioapic_setup(acpi_gbl_FADT.sci_interrupt, 0, 0,
1194                                       acpi_gbl_FADT.sci_interrupt);
1195
1196         /* Fill in identity legacy mappings where no override */
1197         mp_config_acpi_legacy_irqs();
1198
1199         count =
1200             acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE, acpi_parse_nmi_src,
1201                                   nr_irqs);
1202         if (count < 0) {
1203                 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n");
1204                 /* TBD: Cleanup to allow fallback to MPS */
1205                 return count;
1206         }
1207
1208         return 0;
1209 }
1210 #else
1211 static inline int acpi_parse_madt_ioapic_entries(void)
1212 {
1213         return -1;
1214 }
1215 #endif  /* !CONFIG_X86_IO_APIC */
1216
1217 static void __init early_acpi_process_madt(void)
1218 {
1219 #ifdef CONFIG_X86_LOCAL_APIC
1220         int error;
1221
1222         if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1223
1224                 /*
1225                  * Parse MADT LAPIC entries
1226                  */
1227                 error = early_acpi_parse_madt_lapic_addr_ovr();
1228                 if (!error) {
1229                         acpi_lapic = 1;
1230                         smp_found_config = 1;
1231                 }
1232                 if (error == -EINVAL) {
1233                         /*
1234                          * Dell Precision Workstation 410, 610 come here.
1235                          */
1236                         printk(KERN_ERR PREFIX
1237                                "Invalid BIOS MADT, disabling ACPI\n");
1238                         disable_acpi();
1239                 }
1240         }
1241 #endif
1242 }
1243
1244 static void __init acpi_process_madt(void)
1245 {
1246 #ifdef CONFIG_X86_LOCAL_APIC
1247         int error;
1248
1249         if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1250
1251                 /*
1252                  * Parse MADT LAPIC entries
1253                  */
1254                 error = acpi_parse_madt_lapic_entries();
1255                 if (!error) {
1256                         acpi_lapic = 1;
1257
1258                         /*
1259                          * Parse MADT IO-APIC entries
1260                          */
1261                         error = acpi_parse_madt_ioapic_entries();
1262                         if (!error) {
1263                                 acpi_set_irq_model_ioapic();
1264
1265                                 smp_found_config = 1;
1266                         }
1267                 }
1268                 if (error == -EINVAL) {
1269                         /*
1270                          * Dell Precision Workstation 410, 610 come here.
1271                          */
1272                         printk(KERN_ERR PREFIX
1273                                "Invalid BIOS MADT, disabling ACPI\n");
1274                         disable_acpi();
1275                 }
1276         } else {
1277                 /*
1278                  * ACPI found no MADT, and so ACPI wants UP PIC mode.
1279                  * In the event an MPS table was found, forget it.
1280                  * Boot with "acpi=off" to use MPS on such a system.
1281                  */
1282                 if (smp_found_config) {
1283                         printk(KERN_WARNING PREFIX
1284                                 "No APIC-table, disabling MPS\n");
1285                         smp_found_config = 0;
1286                 }
1287         }
1288
1289         /*
1290          * ACPI supports both logical (e.g. Hyper-Threading) and physical
1291          * processors, where MPS only supports physical.
1292          */
1293         if (acpi_lapic && acpi_ioapic)
1294                 printk(KERN_INFO "Using ACPI (MADT) for SMP configuration "
1295                        "information\n");
1296         else if (acpi_lapic)
1297                 printk(KERN_INFO "Using ACPI for processor (LAPIC) "
1298                        "configuration information\n");
1299 #endif
1300         return;
1301 }
1302
1303 static int __init disable_acpi_irq(const struct dmi_system_id *d)
1304 {
1305         if (!acpi_force) {
1306                 printk(KERN_NOTICE "%s detected: force use of acpi=noirq\n",
1307                        d->ident);
1308                 acpi_noirq_set();
1309         }
1310         return 0;
1311 }
1312
1313 static int __init disable_acpi_pci(const struct dmi_system_id *d)
1314 {
1315         if (!acpi_force) {
1316                 printk(KERN_NOTICE "%s detected: force use of pci=noacpi\n",
1317                        d->ident);
1318                 acpi_disable_pci();
1319         }
1320         return 0;
1321 }
1322
1323 static int __init dmi_disable_acpi(const struct dmi_system_id *d)
1324 {
1325         if (!acpi_force) {
1326                 printk(KERN_NOTICE "%s detected: acpi off\n", d->ident);
1327                 disable_acpi();
1328         } else {
1329                 printk(KERN_NOTICE
1330                        "Warning: DMI blacklist says broken, but acpi forced\n");
1331         }
1332         return 0;
1333 }
1334
1335 /*
1336  * Force ignoring BIOS IRQ0 pin2 override
1337  */
1338 static int __init dmi_ignore_irq0_timer_override(const struct dmi_system_id *d)
1339 {
1340         /*
1341          * The ati_ixp4x0_rev() early PCI quirk should have set
1342          * the acpi_skip_timer_override flag already:
1343          */
1344         if (!acpi_skip_timer_override) {
1345                 WARN(1, KERN_ERR "ati_ixp4x0 quirk not complete.\n");
1346                 pr_notice("%s detected: Ignoring BIOS IRQ0 pin2 override\n",
1347                         d->ident);
1348                 acpi_skip_timer_override = 1;
1349         }
1350         return 0;
1351 }
1352
1353 /*
1354  * If your system is blacklisted here, but you find that acpi=force
1355  * works for you, please contact linux-acpi@vger.kernel.org
1356  */
1357 static struct dmi_system_id __initdata acpi_dmi_table[] = {
1358         /*
1359          * Boxes that need ACPI disabled
1360          */
1361         {
1362          .callback = dmi_disable_acpi,
1363          .ident = "IBM Thinkpad",
1364          .matches = {
1365                      DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1366                      DMI_MATCH(DMI_BOARD_NAME, "2629H1G"),
1367                      },
1368          },
1369
1370         /*
1371          * Boxes that need ACPI PCI IRQ routing disabled
1372          */
1373         {
1374          .callback = disable_acpi_irq,
1375          .ident = "ASUS A7V",
1376          .matches = {
1377                      DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC"),
1378                      DMI_MATCH(DMI_BOARD_NAME, "<A7V>"),
1379                      /* newer BIOS, Revision 1011, does work */
1380                      DMI_MATCH(DMI_BIOS_VERSION,
1381                                "ASUS A7V ACPI BIOS Revision 1007"),
1382                      },
1383          },
1384         {
1385                 /*
1386                  * Latest BIOS for IBM 600E (1.16) has bad pcinum
1387                  * for LPC bridge, which is needed for the PCI
1388                  * interrupt links to work. DSDT fix is in bug 5966.
1389                  * 2645, 2646 model numbers are shared with 600/600E/600X
1390                  */
1391          .callback = disable_acpi_irq,
1392          .ident = "IBM Thinkpad 600 Series 2645",
1393          .matches = {
1394                      DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1395                      DMI_MATCH(DMI_BOARD_NAME, "2645"),
1396                      },
1397          },
1398         {
1399          .callback = disable_acpi_irq,
1400          .ident = "IBM Thinkpad 600 Series 2646",
1401          .matches = {
1402                      DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1403                      DMI_MATCH(DMI_BOARD_NAME, "2646"),
1404                      },
1405          },
1406         /*
1407          * Boxes that need ACPI PCI IRQ routing and PCI scan disabled
1408          */
1409         {                       /* _BBN 0 bug */
1410          .callback = disable_acpi_pci,
1411          .ident = "ASUS PR-DLS",
1412          .matches = {
1413                      DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1414                      DMI_MATCH(DMI_BOARD_NAME, "PR-DLS"),
1415                      DMI_MATCH(DMI_BIOS_VERSION,
1416                                "ASUS PR-DLS ACPI BIOS Revision 1010"),
1417                      DMI_MATCH(DMI_BIOS_DATE, "03/21/2003")
1418                      },
1419          },
1420         {
1421          .callback = disable_acpi_pci,
1422          .ident = "Acer TravelMate 36x Laptop",
1423          .matches = {
1424                      DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
1425                      DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"),
1426                      },
1427          },
1428         {}
1429 };
1430
1431 /* second table for DMI checks that should run after early-quirks */
1432 static struct dmi_system_id __initdata acpi_dmi_table_late[] = {
1433         /*
1434          * HP laptops which use a DSDT reporting as HP/SB400/10000,
1435          * which includes some code which overrides all temperature
1436          * trip points to 16C if the INTIN2 input of the I/O APIC
1437          * is enabled.  This input is incorrectly designated the
1438          * ISA IRQ 0 via an interrupt source override even though
1439          * it is wired to the output of the master 8259A and INTIN0
1440          * is not connected at all.  Force ignoring BIOS IRQ0 pin2
1441          * override in that cases.
1442          */
1443         {
1444          .callback = dmi_ignore_irq0_timer_override,
1445          .ident = "HP nx6115 laptop",
1446          .matches = {
1447                      DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1448                      DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6115"),
1449                      },
1450          },
1451         {
1452          .callback = dmi_ignore_irq0_timer_override,
1453          .ident = "HP NX6125 laptop",
1454          .matches = {
1455                      DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1456                      DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6125"),
1457                      },
1458          },
1459         {
1460          .callback = dmi_ignore_irq0_timer_override,
1461          .ident = "HP NX6325 laptop",
1462          .matches = {
1463                      DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1464                      DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6325"),
1465                      },
1466          },
1467         {
1468          .callback = dmi_ignore_irq0_timer_override,
1469          .ident = "HP 6715b laptop",
1470          .matches = {
1471                      DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1472                      DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq 6715b"),
1473                      },
1474          },
1475         {}
1476 };
1477
1478 /*
1479  * acpi_boot_table_init() and acpi_boot_init()
1480  *  called from setup_arch(), always.
1481  *      1. checksums all tables
1482  *      2. enumerates lapics
1483  *      3. enumerates io-apics
1484  *
1485  * acpi_table_init() is separate to allow reading SRAT without
1486  * other side effects.
1487  *
1488  * side effects of acpi_boot_init:
1489  *      acpi_lapic = 1 if LAPIC found
1490  *      acpi_ioapic = 1 if IOAPIC found
1491  *      if (acpi_lapic && acpi_ioapic) smp_found_config = 1;
1492  *      if acpi_blacklisted() acpi_disabled = 1;
1493  *      acpi_irq_model=...
1494  *      ...
1495  */
1496
1497 void __init acpi_boot_table_init(void)
1498 {
1499         dmi_check_system(acpi_dmi_table);
1500
1501         /*
1502          * If acpi_disabled, bail out
1503          */
1504         if (acpi_disabled)
1505                 return;
1506
1507         /*
1508          * Initialize the ACPI boot-time table parser.
1509          */
1510         if (acpi_table_init()) {
1511                 disable_acpi();
1512                 return;
1513         }
1514
1515         acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1516
1517         /*
1518          * blacklist may disable ACPI entirely
1519          */
1520         if (acpi_blacklisted()) {
1521                 if (acpi_force) {
1522                         printk(KERN_WARNING PREFIX "acpi=force override\n");
1523                 } else {
1524                         printk(KERN_WARNING PREFIX "Disabling ACPI support\n");
1525                         disable_acpi();
1526                         return;
1527                 }
1528         }
1529 }
1530
1531 int __init early_acpi_boot_init(void)
1532 {
1533         /*
1534          * If acpi_disabled, bail out
1535          */
1536         if (acpi_disabled)
1537                 return 1;
1538
1539         /*
1540          * Process the Multiple APIC Description Table (MADT), if present
1541          */
1542         early_acpi_process_madt();
1543
1544         return 0;
1545 }
1546
1547 int __init acpi_boot_init(void)
1548 {
1549         /* those are executed after early-quirks are executed */
1550         dmi_check_system(acpi_dmi_table_late);
1551
1552         /*
1553          * If acpi_disabled, bail out
1554          */
1555         if (acpi_disabled)
1556                 return 1;
1557
1558         acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1559
1560         /*
1561          * set sci_int and PM timer address
1562          */
1563         acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt);
1564
1565         /*
1566          * Process the Multiple APIC Description Table (MADT), if present
1567          */
1568         acpi_process_madt();
1569
1570         acpi_table_parse(ACPI_SIG_HPET, acpi_parse_hpet);
1571
1572         if (!acpi_noirq)
1573                 x86_init.pci.init = pci_acpi_init;
1574
1575         return 0;
1576 }
1577
1578 static int __init parse_acpi(char *arg)
1579 {
1580         if (!arg)
1581                 return -EINVAL;
1582
1583         /* "acpi=off" disables both ACPI table parsing and interpreter */
1584         if (strcmp(arg, "off") == 0) {
1585                 disable_acpi();
1586         }
1587         /* acpi=force to over-ride black-list */
1588         else if (strcmp(arg, "force") == 0) {
1589                 acpi_force = 1;
1590                 acpi_disabled = 0;
1591         }
1592         /* acpi=strict disables out-of-spec workarounds */
1593         else if (strcmp(arg, "strict") == 0) {
1594                 acpi_strict = 1;
1595         }
1596         /* acpi=rsdt use RSDT instead of XSDT */
1597         else if (strcmp(arg, "rsdt") == 0) {
1598                 acpi_rsdt_forced = 1;
1599         }
1600         /* "acpi=noirq" disables ACPI interrupt routing */
1601         else if (strcmp(arg, "noirq") == 0) {
1602                 acpi_noirq_set();
1603         }
1604         /* "acpi=copy_dsdt" copys DSDT */
1605         else if (strcmp(arg, "copy_dsdt") == 0) {
1606                 acpi_gbl_copy_dsdt_locally = 1;
1607         } else {
1608                 /* Core will printk when we return error. */
1609                 return -EINVAL;
1610         }
1611         return 0;
1612 }
1613 early_param("acpi", parse_acpi);
1614
1615 /* FIXME: Using pci= for an ACPI parameter is a travesty. */
1616 static int __init parse_pci(char *arg)
1617 {
1618         if (arg && strcmp(arg, "noacpi") == 0)
1619                 acpi_disable_pci();
1620         return 0;
1621 }
1622 early_param("pci", parse_pci);
1623
1624 int __init acpi_mps_check(void)
1625 {
1626 #if defined(CONFIG_X86_LOCAL_APIC) && !defined(CONFIG_X86_MPPARSE)
1627 /* mptable code is not built-in*/
1628         if (acpi_disabled || acpi_noirq) {
1629                 printk(KERN_WARNING "MPS support code is not built-in.\n"
1630                        "Using acpi=off or acpi=noirq or pci=noacpi "
1631                        "may have problem\n");
1632                 return 1;
1633         }
1634 #endif
1635         return 0;
1636 }
1637
1638 #ifdef CONFIG_X86_IO_APIC
1639 static int __init parse_acpi_skip_timer_override(char *arg)
1640 {
1641         acpi_skip_timer_override = 1;
1642         return 0;
1643 }
1644 early_param("acpi_skip_timer_override", parse_acpi_skip_timer_override);
1645
1646 static int __init parse_acpi_use_timer_override(char *arg)
1647 {
1648         acpi_use_timer_override = 1;
1649         return 0;
1650 }
1651 early_param("acpi_use_timer_override", parse_acpi_use_timer_override);
1652 #endif /* CONFIG_X86_IO_APIC */
1653
1654 static int __init setup_acpi_sci(char *s)
1655 {
1656         if (!s)
1657                 return -EINVAL;
1658         if (!strcmp(s, "edge"))
1659                 acpi_sci_flags =  ACPI_MADT_TRIGGER_EDGE |
1660                         (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1661         else if (!strcmp(s, "level"))
1662                 acpi_sci_flags = ACPI_MADT_TRIGGER_LEVEL |
1663                         (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1664         else if (!strcmp(s, "high"))
1665                 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_HIGH |
1666                         (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1667         else if (!strcmp(s, "low"))
1668                 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_LOW |
1669                         (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1670         else
1671                 return -EINVAL;
1672         return 0;
1673 }
1674 early_param("acpi_sci", setup_acpi_sci);
1675
1676 int __acpi_acquire_global_lock(unsigned int *lock)
1677 {
1678         unsigned int old, new, val;
1679         do {
1680                 old = *lock;
1681                 new = (((old & ~0x3) + 2) + ((old >> 1) & 0x1));
1682                 val = cmpxchg(lock, old, new);
1683         } while (unlikely (val != old));
1684         return (new < 3) ? -1 : 0;
1685 }
1686
1687 int __acpi_release_global_lock(unsigned int *lock)
1688 {
1689         unsigned int old, new, val;
1690         do {
1691                 old = *lock;
1692                 new = old & ~0x3;
1693                 val = cmpxchg(lock, old, new);
1694         } while (unlikely (val != old));
1695         return old & 0x1;
1696 }