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 #include "sleep.h" /* To include x86_acpi_suspend_lowlevel */
  48 static int __initdata acpi_force = 0;
  49 u32 acpi_rsdt_forced;
  50 int acpi_disabled;
  51 EXPORT_SYMBOL(acpi_disabled);
  52
  53 #ifdef  CONFIG_X86_64
  54 # include <asm/proto.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 int acpi_disable_cmcff;
  71
  72 u8 acpi_sci_flags __initdata;
  73 int acpi_sci_override_gsi __initdata;
  74 int acpi_skip_timer_override __initdata;
  75 int acpi_use_timer_override __initdata;
  76 int acpi_fix_pin2_polarity __initdata;
  77
  78 #ifdef CONFIG_X86_LOCAL_APIC
  79 static u64 acpi_lapic_addr __initdata = APIC_DEFAULT_PHYS_BASE;
  80 #endif
  81
  82 #ifndef __HAVE_ARCH_CMPXCHG
  83 #warning ACPI uses CMPXCHG, i486 and later hardware
  84 #endif
  85
  86 /* --------------------------------------------------------------------------
  87                               Boot-time Configuration
  88    -------------------------------------------------------------------------- */
  89
  90 /*
  91  * The default interrupt routing model is PIC (8259).  This gets
  92  * overridden if IOAPICs are enumerated (below).
  93  */
  94 enum acpi_irq_model_id acpi_irq_model = ACPI_IRQ_MODEL_PIC;
  95
  96
  97 /*
  98  * ISA irqs by default are the first 16 gsis but can be
  99  * any gsi as specified by an interrupt source override.
 100  */
 101 static u32 isa_irq_to_gsi[NR_IRQS_LEGACY] __read_mostly = {
 102         0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15
 103 };
 104
 105 static unsigned int gsi_to_irq(unsigned int gsi)
 106 {
 107         unsigned int irq = gsi + NR_IRQS_LEGACY;
 108         unsigned int i;
 109
 110         for (i = 0; i < NR_IRQS_LEGACY; i++) {
 111                 if (isa_irq_to_gsi[i] == gsi) {
 112                         return i;
 113                 }
 114         }
 115
 116         /* Provide an identity mapping of gsi == irq
 117          * except on truly weird platforms that have
 118          * non isa irqs in the first 16 gsis.
 119          */
 120         if (gsi >= NR_IRQS_LEGACY)
 121                 irq = gsi;
 122         else
 123                 irq = gsi_top + gsi;
 124
 125         return irq;
 126 }
 127
 128 static u32 irq_to_gsi(int irq)
 129 {
 130         unsigned int gsi;
 131
 132         if (irq < NR_IRQS_LEGACY)
 133                 gsi = isa_irq_to_gsi[irq];
 134         else if (irq < gsi_top)
 135                 gsi = irq;
 136         else if (irq < (gsi_top + NR_IRQS_LEGACY))
 137                 gsi = irq - gsi_top;
 138         else
 139                 gsi = 0xffffffff;
 140
 141         return gsi;
 142 }
 143
 144 /*
 145  * This is just a simple wrapper around early_ioremap(),
 146  * with sanity checks for phys == 0 and size == 0.
 147  */
 148 char *__init __acpi_map_table(unsigned long phys, unsigned long size)
 149 {
 150
 151         if (!phys || !size)
 152                 return NULL;
 153
 154         return early_ioremap(phys, size);
 155 }
 156
 157 void __init __acpi_unmap_table(char *map, unsigned long size)
 158 {
 159         if (!map || !size)
 160                 return;
 161
 162         early_iounmap(map, size);
 163 }
 164
 165 #ifdef CONFIG_X86_LOCAL_APIC
 166 static int __init acpi_parse_madt(struct acpi_table_header *table)
 167 {
 168         struct acpi_table_madt *madt = NULL;
 169
 170         if (!cpu_has_apic)
 171                 return -EINVAL;
 172
 173         madt = (struct acpi_table_madt *)table;
 174         if (!madt) {
 175                 printk(KERN_WARNING PREFIX "Unable to map MADT\n");
 176                 return -ENODEV;
 177         }
 178
 179         if (madt->address) {
 180                 acpi_lapic_addr = (u64) madt->address;
 181
 182                 printk(KERN_DEBUG PREFIX "Local APIC address 0x%08x\n",
 183                        madt->address);
 184         }
 185
 186         default_acpi_madt_oem_check(madt->header.oem_id,
 187                                     madt->header.oem_table_id);
 188
 189         return 0;
 190 }
 191
 192 static void acpi_register_lapic(int id, u8 enabled)
 193 {
 194         unsigned int ver = 0;
 195
 196         if (id >= MAX_LOCAL_APIC) {
 197                 printk(KERN_INFO PREFIX "skipped apicid that is too big\n");
 198                 return;
 199         }
 200
 201         if (!enabled) {
 202                 ++disabled_cpus;
 203                 return;
 204         }
 205
 206         if (boot_cpu_physical_apicid != -1U)
 207                 ver = apic_version[boot_cpu_physical_apicid];
 208
 209         generic_processor_info(id, ver);
 210 }
 211
 212 static int __init
 213 acpi_parse_x2apic(struct acpi_subtable_header *header, const unsigned long end)
 214 {
 215         struct acpi_madt_local_x2apic *processor = NULL;
 216         int apic_id;
 217         u8 enabled;
 218
 219         processor = (struct acpi_madt_local_x2apic *)header;
 220
 221         if (BAD_MADT_ENTRY(processor, end))
 222                 return -EINVAL;
 223
 224         acpi_table_print_madt_entry(header);
 225
 226         apic_id = processor->local_apic_id;
 227         enabled = processor->lapic_flags & ACPI_MADT_ENABLED;
 228 #ifdef CONFIG_X86_X2APIC
 229         /*
 230          * We need to register disabled CPU as well to permit
 231          * counting disabled CPUs. This allows us to size
 232          * cpus_possible_map more accurately, to permit
 233          * to not preallocating memory for all NR_CPUS
 234          * when we use CPU hotplug.
 235          */
 236         if (!apic->apic_id_valid(apic_id) && enabled)
 237                 printk(KERN_WARNING PREFIX "x2apic entry ignored\n");
 238         else
 239                 acpi_register_lapic(apic_id, 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) {
 420                 if (acpi_skip_timer_override) {
 421                         printk(PREFIX "BIOS IRQ0 override ignored.\n");
 422                         return 0;
 423                 }
 424
 425                 if ((intsrc->global_irq == 2) && acpi_fix_pin2_polarity
 426                         && (intsrc->inti_flags & ACPI_MADT_POLARITY_MASK)) {
 427                         intsrc->inti_flags &= ~ACPI_MADT_POLARITY_MASK;
 428                         printk(PREFIX "BIOS IRQ0 pin2 override: forcing polarity to high active.\n");
 429                 }
 430         }
 431
 432         mp_override_legacy_irq(intsrc->source_irq,
 433                                 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
 434                                 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2,
 435                                 intsrc->global_irq);
 436
 437         return 0;
 438 }
 439
 440 static int __init
 441 acpi_parse_nmi_src(struct acpi_subtable_header * header, const unsigned long end)
 442 {
 443         struct acpi_madt_nmi_source *nmi_src = NULL;
 444
 445         nmi_src = (struct acpi_madt_nmi_source *)header;
 446
 447         if (BAD_MADT_ENTRY(nmi_src, end))
 448                 return -EINVAL;
 449
 450         acpi_table_print_madt_entry(header);
 451
 452         /* TBD: Support nimsrc entries? */
 453
 454         return 0;
 455 }
 456
 457 #endif                          /* CONFIG_X86_IO_APIC */
 458
 459 /*
 460  * acpi_pic_sci_set_trigger()
 461  *
 462  * use ELCR to set PIC-mode trigger type for SCI
 463  *
 464  * If a PIC-mode SCI is not recognized or gives spurious IRQ7's
 465  * it may require Edge Trigger -- use "acpi_sci=edge"
 466  *
 467  * Port 0x4d0-4d1 are ECLR1 and ECLR2, the Edge/Level Control Registers
 468  * for the 8259 PIC.  bit[n] = 1 means irq[n] is Level, otherwise Edge.
 469  * ECLR1 is IRQs 0-7 (IRQ 0, 1, 2 must be 0)
 470  * ECLR2 is IRQs 8-15 (IRQ 8, 13 must be 0)
 471  */
 472
 473 void __init acpi_pic_sci_set_trigger(unsigned int irq, u16 trigger)
 474 {
 475         unsigned int mask = 1 << irq;
 476         unsigned int old, new;
 477
 478         /* Real old ELCR mask */
 479         old = inb(0x4d0) | (inb(0x4d1) << 8);
 480
 481         /*
 482          * If we use ACPI to set PCI IRQs, then we should clear ELCR
 483          * since we will set it correctly as we enable the PCI irq
 484          * routing.
 485          */
 486         new = acpi_noirq ? old : 0;
 487
 488         /*
 489          * Update SCI information in the ELCR, it isn't in the PCI
 490          * routing tables..
 491          */
 492         switch (trigger) {
 493         case 1:         /* Edge - clear */
 494                 new &= ~mask;
 495                 break;
 496         case 3:         /* Level - set */
 497                 new |= mask;
 498                 break;
 499         }
 500
 501         if (old == new)
 502                 return;
 503
 504         printk(PREFIX "setting ELCR to %04x (from %04x)\n", new, old);
 505         outb(new, 0x4d0);
 506         outb(new >> 8, 0x4d1);
 507 }
 508
 509 int acpi_gsi_to_irq(u32 gsi, unsigned int *irq)
 510 {
 511         *irq = gsi_to_irq(gsi);
 512
 513 #ifdef CONFIG_X86_IO_APIC
 514         if (acpi_irq_model == ACPI_IRQ_MODEL_IOAPIC)
 515                 setup_IO_APIC_irq_extra(gsi);
 516 #endif
 517
 518         return 0;
 519 }
 520 EXPORT_SYMBOL_GPL(acpi_gsi_to_irq);
 521
 522 int acpi_isa_irq_to_gsi(unsigned isa_irq, u32 *gsi)
 523 {
 524         if (isa_irq >= 16)
 525                 return -1;
 526         *gsi = irq_to_gsi(isa_irq);
 527         return 0;
 528 }
 529
 530 static int acpi_register_gsi_pic(struct device *dev, u32 gsi,
 531                                  int trigger, int polarity)
 532 {
 533 #ifdef CONFIG_PCI
 534         /*
 535          * Make sure all (legacy) PCI IRQs are set as level-triggered.
 536          */
 537         if (trigger == ACPI_LEVEL_SENSITIVE)
 538                 eisa_set_level_irq(gsi);
 539 #endif
 540
 541         return gsi;
 542 }
 543
 544 static int acpi_register_gsi_ioapic(struct device *dev, u32 gsi,
 545                                     int trigger, int polarity)
 546 {
 547 #ifdef CONFIG_X86_IO_APIC
 548         gsi = mp_register_gsi(dev, gsi, trigger, polarity);
 549 #endif
 550
 551         return gsi;
 552 }
 553
 554 int (*__acpi_register_gsi)(struct device *dev, u32 gsi,
 555                            int trigger, int polarity) = acpi_register_gsi_pic;
 556
 557 #ifdef CONFIG_ACPI_SLEEP
 558 int (*acpi_suspend_lowlevel)(void) = x86_acpi_suspend_lowlevel;
 559 #else
 560 int (*acpi_suspend_lowlevel)(void);
 561 #endif
 562
 563 /*
 564  * success: return IRQ number (>=0)
 565  * failure: return < 0
 566  */
 567 int acpi_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity)
 568 {
 569         unsigned int irq;
 570         unsigned int plat_gsi = gsi;
 571
 572         plat_gsi = (*__acpi_register_gsi)(dev, gsi, trigger, polarity);
 573         irq = gsi_to_irq(plat_gsi);
 574
 575         return irq;
 576 }
 577 EXPORT_SYMBOL_GPL(acpi_register_gsi);
 578
 579 void acpi_unregister_gsi(u32 gsi)
 580 {
 581 }
 582 EXPORT_SYMBOL_GPL(acpi_unregister_gsi);
 583
 584 void __init acpi_set_irq_model_pic(void)
 585 {
 586         acpi_irq_model = ACPI_IRQ_MODEL_PIC;
 587         __acpi_register_gsi = acpi_register_gsi_pic;
 588         acpi_ioapic = 0;
 589 }
 590
 591 void __init acpi_set_irq_model_ioapic(void)
 592 {
 593         acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC;
 594         __acpi_register_gsi = acpi_register_gsi_ioapic;
 595         acpi_ioapic = 1;
 596 }
 597
 598 /*
 599  *  ACPI based hotplug support for CPU
 600  */
 601 #ifdef CONFIG_ACPI_HOTPLUG_CPU
 602 #include <acpi/processor.h>
 603
 604 static void acpi_map_cpu2node(acpi_handle handle, int cpu, int physid)
 605 {
 606 #ifdef CONFIG_ACPI_NUMA
 607         int nid;
 608
 609         nid = acpi_get_node(handle);
 610         if (nid == -1 || !node_online(nid))
 611                 return;
 612         set_apicid_to_node(physid, nid);
 613         numa_set_node(cpu, nid);
 614 #endif
 615 }
 616
 617 static int _acpi_map_lsapic(acpi_handle handle, int *pcpu)
 618 {
 619         struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
 620         union acpi_object *obj;
 621         struct acpi_madt_local_apic *lapic;
 622         cpumask_var_t tmp_map, new_map;
 623         u8 physid;
 624         int cpu;
 625         int retval = -ENOMEM;
 626
 627         if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer)))
 628                 return -EINVAL;
 629
 630         if (!buffer.length || !buffer.pointer)
 631                 return -EINVAL;
 632
 633         obj = buffer.pointer;
 634         if (obj->type != ACPI_TYPE_BUFFER ||
 635             obj->buffer.length < sizeof(*lapic)) {
 636                 kfree(buffer.pointer);
 637                 return -EINVAL;
 638         }
 639
 640         lapic = (struct acpi_madt_local_apic *)obj->buffer.pointer;
 641
 642         if (lapic->header.type != ACPI_MADT_TYPE_LOCAL_APIC ||
 643             !(lapic->lapic_flags & ACPI_MADT_ENABLED)) {
 644                 kfree(buffer.pointer);
 645                 return -EINVAL;
 646         }
 647
 648         physid = lapic->id;
 649
 650         kfree(buffer.pointer);
 651         buffer.length = ACPI_ALLOCATE_BUFFER;
 652         buffer.pointer = NULL;
 653         lapic = NULL;
 654
 655         if (!alloc_cpumask_var(&tmp_map, GFP_KERNEL))
 656                 goto out;
 657
 658         if (!alloc_cpumask_var(&new_map, GFP_KERNEL))
 659                 goto free_tmp_map;
 660
 661         cpumask_copy(tmp_map, cpu_present_mask);
 662         acpi_register_lapic(physid, ACPI_MADT_ENABLED);
 663
 664         /*
 665          * If acpi_register_lapic successfully generates a new logical cpu
 666          * number, then the following will get us exactly what was mapped
 667          */
 668         cpumask_andnot(new_map, cpu_present_mask, tmp_map);
 669         if (cpumask_empty(new_map)) {
 670                 printk ("Unable to map lapic to logical cpu number\n");
 671                 retval = -EINVAL;
 672                 goto free_new_map;
 673         }
 674
 675         acpi_processor_set_pdc(handle);
 676
 677         cpu = cpumask_first(new_map);
 678         acpi_map_cpu2node(handle, cpu, physid);
 679
 680         *pcpu = cpu;
 681         retval = 0;
 682
 683 free_new_map:
 684         free_cpumask_var(new_map);
 685 free_tmp_map:
 686         free_cpumask_var(tmp_map);
 687 out:
 688         return retval;
 689 }
 690
 691 /* wrapper to silence section mismatch warning */
 692 int __ref acpi_map_lsapic(acpi_handle handle, int *pcpu)
 693 {
 694         return _acpi_map_lsapic(handle, pcpu);
 695 }
 696 EXPORT_SYMBOL(acpi_map_lsapic);
 697
 698 int acpi_unmap_lsapic(int cpu)
 699 {
 700 #ifdef CONFIG_ACPI_NUMA
 701         set_apicid_to_node(per_cpu(x86_cpu_to_apicid, cpu), NUMA_NO_NODE);
 702 #endif
 703
 704         per_cpu(x86_cpu_to_apicid, cpu) = -1;
 705         set_cpu_present(cpu, false);
 706         num_processors--;
 707
 708         return (0);
 709 }
 710
 711 EXPORT_SYMBOL(acpi_unmap_lsapic);
 712 #endif                          /* CONFIG_ACPI_HOTPLUG_CPU */
 713
 714 int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base)
 715 {
 716         /* TBD */
 717         return -EINVAL;
 718 }
 719
 720 EXPORT_SYMBOL(acpi_register_ioapic);
 721
 722 int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base)
 723 {
 724         /* TBD */
 725         return -EINVAL;
 726 }
 727
 728 EXPORT_SYMBOL(acpi_unregister_ioapic);
 729
 730 static int __init acpi_parse_sbf(struct acpi_table_header *table)
 731 {
 732         struct acpi_table_boot *sb;
 733
 734         sb = (struct acpi_table_boot *)table;
 735         if (!sb) {
 736                 printk(KERN_WARNING PREFIX "Unable to map SBF\n");
 737                 return -ENODEV;
 738         }
 739
 740         sbf_port = sb->cmos_index;      /* Save CMOS port */
 741
 742         return 0;
 743 }
 744
 745 #ifdef CONFIG_HPET_TIMER
 746 #include <asm/hpet.h>
 747
 748 static struct __initdata resource *hpet_res;
 749
 750 static int __init acpi_parse_hpet(struct acpi_table_header *table)
 751 {
 752         struct acpi_table_hpet *hpet_tbl;
 753
 754         hpet_tbl = (struct acpi_table_hpet *)table;
 755         if (!hpet_tbl) {
 756                 printk(KERN_WARNING PREFIX "Unable to map HPET\n");
 757                 return -ENODEV;
 758         }
 759
 760         if (hpet_tbl->address.space_id != ACPI_SPACE_MEM) {
 761                 printk(KERN_WARNING PREFIX "HPET timers must be located in "
 762                        "memory.\n");
 763                 return -1;
 764         }
 765
 766         hpet_address = hpet_tbl->address.address;
 767         hpet_blockid = hpet_tbl->sequence;
 768
 769         /*
 770          * Some broken BIOSes advertise HPET at 0x0. We really do not
 771          * want to allocate a resource there.
 772          */
 773         if (!hpet_address) {
 774                 printk(KERN_WARNING PREFIX
 775                        "HPET id: %#x base: %#lx is invalid\n",
 776                        hpet_tbl->id, hpet_address);
 777                 return 0;
 778         }
 779 #ifdef CONFIG_X86_64
 780         /*
 781          * Some even more broken BIOSes advertise HPET at
 782          * 0xfed0000000000000 instead of 0xfed00000. Fix it up and add
 783          * some noise:
 784          */
 785         if (hpet_address == 0xfed0000000000000UL) {
 786                 if (!hpet_force_user) {
 787                         printk(KERN_WARNING PREFIX "HPET id: %#x "
 788                                "base: 0xfed0000000000000 is bogus\n "
 789                                "try hpet=force on the kernel command line to "
 790                                "fix it up to 0xfed00000.\n", hpet_tbl->id);
 791                         hpet_address = 0;
 792                         return 0;
 793                 }
 794                 printk(KERN_WARNING PREFIX
 795                        "HPET id: %#x base: 0xfed0000000000000 fixed up "
 796                        "to 0xfed00000.\n", hpet_tbl->id);
 797                 hpet_address >>= 32;
 798         }
 799 #endif
 800         printk(KERN_INFO PREFIX "HPET id: %#x base: %#lx\n",
 801                hpet_tbl->id, hpet_address);
 802
 803         /*
 804          * Allocate and initialize the HPET firmware resource for adding into
 805          * the resource tree during the lateinit timeframe.
 806          */
 807 #define HPET_RESOURCE_NAME_SIZE 9
 808         hpet_res = alloc_bootmem(sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE);
 809
 810         hpet_res->name = (void *)&hpet_res[1];
 811         hpet_res->flags = IORESOURCE_MEM;
 812         snprintf((char *)hpet_res->name, HPET_RESOURCE_NAME_SIZE, "HPET %u",
 813                  hpet_tbl->sequence);
 814
 815         hpet_res->start = hpet_address;
 816         hpet_res->end = hpet_address + (1 * 1024) - 1;
 817
 818         return 0;
 819 }
 820
 821 /*
 822  * hpet_insert_resource inserts the HPET resources used into the resource
 823  * tree.
 824  */
 825 static __init int hpet_insert_resource(void)
 826 {
 827         if (!hpet_res)
 828                 return 1;
 829
 830         return insert_resource(&iomem_resource, hpet_res);
 831 }
 832
 833 late_initcall(hpet_insert_resource);
 834
 835 #else
 836 #define acpi_parse_hpet NULL
 837 #endif
 838
 839 static int __init acpi_parse_fadt(struct acpi_table_header *table)
 840 {
 841
 842 #ifdef CONFIG_X86_PM_TIMER
 843         /* detect the location of the ACPI PM Timer */
 844         if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID) {
 845                 /* FADT rev. 2 */
 846                 if (acpi_gbl_FADT.xpm_timer_block.space_id !=
 847                     ACPI_ADR_SPACE_SYSTEM_IO)
 848                         return 0;
 849
 850                 pmtmr_ioport = acpi_gbl_FADT.xpm_timer_block.address;
 851                 /*
 852                  * "X" fields are optional extensions to the original V1.0
 853                  * fields, so we must selectively expand V1.0 fields if the
 854                  * corresponding X field is zero.
 855                  */
 856                 if (!pmtmr_ioport)
 857                         pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
 858         } else {
 859                 /* FADT rev. 1 */
 860                 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
 861         }
 862         if (pmtmr_ioport)
 863                 printk(KERN_INFO PREFIX "PM-Timer IO Port: %#x\n",
 864                        pmtmr_ioport);
 865 #endif
 866         return 0;
 867 }
 868
 869 #ifdef  CONFIG_X86_LOCAL_APIC
 870 /*
 871  * Parse LAPIC entries in MADT
 872  * returns 0 on success, < 0 on error
 873  */
 874
 875 static int __init early_acpi_parse_madt_lapic_addr_ovr(void)
 876 {
 877         int count;
 878
 879         if (!cpu_has_apic)
 880                 return -ENODEV;
 881
 882         /*
 883          * Note that the LAPIC address is obtained from the MADT (32-bit value)
 884          * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value).
 885          */
 886
 887         count =
 888             acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
 889                                   acpi_parse_lapic_addr_ovr, 0);
 890         if (count < 0) {
 891                 printk(KERN_ERR PREFIX
 892                        "Error parsing LAPIC address override entry\n");
 893                 return count;
 894         }
 895
 896         register_lapic_address(acpi_lapic_addr);
 897
 898         return count;
 899 }
 900
 901 static int __init acpi_parse_madt_lapic_entries(void)
 902 {
 903         int count;
 904         int x2count = 0;
 905
 906         if (!cpu_has_apic)
 907                 return -ENODEV;
 908
 909         /*
 910          * Note that the LAPIC address is obtained from the MADT (32-bit value)
 911          * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value).
 912          */
 913
 914         count =
 915             acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
 916                                   acpi_parse_lapic_addr_ovr, 0);
 917         if (count < 0) {
 918                 printk(KERN_ERR PREFIX
 919                        "Error parsing LAPIC address override entry\n");
 920                 return count;
 921         }
 922
 923         register_lapic_address(acpi_lapic_addr);
 924
 925         count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC,
 926                                       acpi_parse_sapic, MAX_LOCAL_APIC);
 927
 928         if (!count) {
 929                 x2count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC,
 930                                         acpi_parse_x2apic, MAX_LOCAL_APIC);
 931                 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC,
 932                                         acpi_parse_lapic, MAX_LOCAL_APIC);
 933         }
 934         if (!count && !x2count) {
 935                 printk(KERN_ERR PREFIX "No LAPIC entries present\n");
 936                 /* TBD: Cleanup to allow fallback to MPS */
 937                 return -ENODEV;
 938         } else if (count < 0 || x2count < 0) {
 939                 printk(KERN_ERR PREFIX "Error parsing LAPIC entry\n");
 940                 /* TBD: Cleanup to allow fallback to MPS */
 941                 return count;
 942         }
 943
 944         x2count =
 945             acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC_NMI,
 946                                   acpi_parse_x2apic_nmi, 0);
 947         count =
 948             acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI, acpi_parse_lapic_nmi, 0);
 949         if (count < 0 || x2count < 0) {
 950                 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n");
 951                 /* TBD: Cleanup to allow fallback to MPS */
 952                 return count;
 953         }
 954         return 0;
 955 }
 956 #endif                          /* CONFIG_X86_LOCAL_APIC */
 957
 958 #ifdef  CONFIG_X86_IO_APIC
 959 #define MP_ISA_BUS              0
 960
 961 #ifdef CONFIG_X86_ES7000
 962 extern int es7000_plat;
 963 #endif
 964
 965 void __init mp_override_legacy_irq(u8 bus_irq, u8 polarity, u8 trigger, u32 gsi)
 966 {
 967         int ioapic;
 968         int pin;
 969         struct mpc_intsrc mp_irq;
 970
 971         /*
 972          * Convert 'gsi' to 'ioapic.pin'.
 973          */
 974         ioapic = mp_find_ioapic(gsi);
 975         if (ioapic < 0)
 976                 return;
 977         pin = mp_find_ioapic_pin(ioapic, gsi);
 978
 979         /*
 980          * TBD: This check is for faulty timer entries, where the override
 981          *      erroneously sets the trigger to level, resulting in a HUGE
 982          *      increase of timer interrupts!
 983          */
 984         if ((bus_irq == 0) && (trigger == 3))
 985                 trigger = 1;
 986
 987         mp_irq.type = MP_INTSRC;
 988         mp_irq.irqtype = mp_INT;
 989         mp_irq.irqflag = (trigger << 2) | polarity;
 990         mp_irq.srcbus = MP_ISA_BUS;
 991         mp_irq.srcbusirq = bus_irq;     /* IRQ */
 992         mp_irq.dstapic = mpc_ioapic_id(ioapic); /* APIC ID */
 993         mp_irq.dstirq = pin;    /* INTIN# */
 994
 995         mp_save_irq(&mp_irq);
 996
 997         isa_irq_to_gsi[bus_irq] = gsi;
 998 }
 999
1000 void __init mp_config_acpi_legacy_irqs(void)
1001 {
1002         int i;
1003         struct mpc_intsrc mp_irq;
1004
1005 #ifdef CONFIG_EISA
1006         /*
1007          * Fabricate the legacy ISA bus (bus #31).
1008          */
1009         mp_bus_id_to_type[MP_ISA_BUS] = MP_BUS_ISA;
1010 #endif
1011         set_bit(MP_ISA_BUS, mp_bus_not_pci);
1012         pr_debug("Bus #%d is ISA\n", MP_ISA_BUS);
1013
1014 #ifdef CONFIG_X86_ES7000
1015         /*
1016          * Older generations of ES7000 have no legacy identity mappings
1017          */
1018         if (es7000_plat == 1)
1019                 return;
1020 #endif
1021
1022         /*
1023          * Use the default configuration for the IRQs 0-15.  Unless
1024          * overridden by (MADT) interrupt source override entries.
1025          */
1026         for (i = 0; i < 16; i++) {
1027                 int ioapic, pin;
1028                 unsigned int dstapic;
1029                 int idx;
1030                 u32 gsi;
1031
1032                 /* Locate the gsi that irq i maps to. */
1033                 if (acpi_isa_irq_to_gsi(i, &gsi))
1034                         continue;
1035
1036                 /*
1037                  * Locate the IOAPIC that manages the ISA IRQ.
1038                  */
1039                 ioapic = mp_find_ioapic(gsi);
1040                 if (ioapic < 0)
1041                         continue;
1042                 pin = mp_find_ioapic_pin(ioapic, gsi);
1043                 dstapic = mpc_ioapic_id(ioapic);
1044
1045                 for (idx = 0; idx < mp_irq_entries; idx++) {
1046                         struct mpc_intsrc *irq = mp_irqs + idx;
1047
1048                         /* Do we already have a mapping for this ISA IRQ? */
1049                         if (irq->srcbus == MP_ISA_BUS && irq->srcbusirq == i)
1050                                 break;
1051
1052                         /* Do we already have a mapping for this IOAPIC pin */
1053                         if (irq->dstapic == dstapic && irq->dstirq == pin)
1054                                 break;
1055                 }
1056
1057                 if (idx != mp_irq_entries) {
1058                         printk(KERN_DEBUG "ACPI: IRQ%d used by override.\n", i);
1059                         continue;       /* IRQ already used */
1060                 }
1061
1062                 mp_irq.type = MP_INTSRC;
1063                 mp_irq.irqflag = 0;     /* Conforming */
1064                 mp_irq.srcbus = MP_ISA_BUS;
1065                 mp_irq.dstapic = dstapic;
1066                 mp_irq.irqtype = mp_INT;
1067                 mp_irq.srcbusirq = i; /* Identity mapped */
1068                 mp_irq.dstirq = pin;
1069
1070                 mp_save_irq(&mp_irq);
1071         }
1072 }
1073
1074 static int mp_config_acpi_gsi(struct device *dev, u32 gsi, int trigger,
1075                         int polarity)
1076 {
1077 #ifdef CONFIG_X86_MPPARSE
1078         struct mpc_intsrc mp_irq;
1079         struct pci_dev *pdev;
1080         unsigned char number;
1081         unsigned int devfn;
1082         int ioapic;
1083         u8 pin;
1084
1085         if (!acpi_ioapic)
1086                 return 0;
1087         if (!dev)
1088                 return 0;
1089         if (dev->bus != &pci_bus_type)
1090                 return 0;
1091
1092         pdev = to_pci_dev(dev);
1093         number = pdev->bus->number;
1094         devfn = pdev->devfn;
1095         pin = pdev->pin;
1096         /* print the entry should happen on mptable identically */
1097         mp_irq.type = MP_INTSRC;
1098         mp_irq.irqtype = mp_INT;
1099         mp_irq.irqflag = (trigger == ACPI_EDGE_SENSITIVE ? 4 : 0x0c) |
1100                                 (polarity == ACPI_ACTIVE_HIGH ? 1 : 3);
1101         mp_irq.srcbus = number;
1102         mp_irq.srcbusirq = (((devfn >> 3) & 0x1f) << 2) | ((pin - 1) & 3);
1103         ioapic = mp_find_ioapic(gsi);
1104         mp_irq.dstapic = mpc_ioapic_id(ioapic);
1105         mp_irq.dstirq = mp_find_ioapic_pin(ioapic, gsi);
1106
1107         mp_save_irq(&mp_irq);
1108 #endif
1109         return 0;
1110 }
1111
1112 int mp_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity)
1113 {
1114         int ioapic;
1115         int ioapic_pin;
1116         struct io_apic_irq_attr irq_attr;
1117         int ret;
1118
1119         if (acpi_irq_model != ACPI_IRQ_MODEL_IOAPIC)
1120                 return gsi;
1121
1122         /* Don't set up the ACPI SCI because it's already set up */
1123         if (acpi_gbl_FADT.sci_interrupt == gsi)
1124                 return gsi;
1125
1126         ioapic = mp_find_ioapic(gsi);
1127         if (ioapic < 0) {
1128                 printk(KERN_WARNING "No IOAPIC for GSI %u\n", gsi);
1129                 return gsi;
1130         }
1131
1132         ioapic_pin = mp_find_ioapic_pin(ioapic, gsi);
1133
1134         if (ioapic_pin > MP_MAX_IOAPIC_PIN) {
1135                 printk(KERN_ERR "Invalid reference to IOAPIC pin "
1136                        "%d-%d\n", mpc_ioapic_id(ioapic),
1137                        ioapic_pin);
1138                 return gsi;
1139         }
1140
1141         if (enable_update_mptable)
1142                 mp_config_acpi_gsi(dev, gsi, trigger, polarity);
1143
1144         set_io_apic_irq_attr(&irq_attr, ioapic, ioapic_pin,
1145                              trigger == ACPI_EDGE_SENSITIVE ? 0 : 1,
1146                              polarity == ACPI_ACTIVE_HIGH ? 0 : 1);
1147         ret = io_apic_set_pci_routing(dev, gsi_to_irq(gsi), &irq_attr);
1148         if (ret < 0)
1149                 gsi = INT_MIN;
1150
1151         return gsi;
1152 }
1153
1154 /*
1155  * Parse IOAPIC related entries in MADT
1156  * returns 0 on success, < 0 on error
1157  */
1158 static int __init acpi_parse_madt_ioapic_entries(void)
1159 {
1160         int count;
1161
1162         /*
1163          * ACPI interpreter is required to complete interrupt setup,
1164          * so if it is off, don't enumerate the io-apics with ACPI.
1165          * If MPS is present, it will handle them,
1166          * otherwise the system will stay in PIC mode
1167          */
1168         if (acpi_disabled || acpi_noirq)
1169                 return -ENODEV;
1170
1171         if (!cpu_has_apic)
1172                 return -ENODEV;
1173
1174         /*
1175          * if "noapic" boot option, don't look for IO-APICs
1176          */
1177         if (skip_ioapic_setup) {
1178                 printk(KERN_INFO PREFIX "Skipping IOAPIC probe "
1179                        "due to 'noapic' option.\n");
1180                 return -ENODEV;
1181         }
1182
1183         count =
1184             acpi_table_parse_madt(ACPI_MADT_TYPE_IO_APIC, acpi_parse_ioapic,
1185                                   MAX_IO_APICS);
1186         if (!count) {
1187                 printk(KERN_ERR PREFIX "No IOAPIC entries present\n");
1188                 return -ENODEV;
1189         } else if (count < 0) {
1190                 printk(KERN_ERR PREFIX "Error parsing IOAPIC entry\n");
1191                 return count;
1192         }
1193
1194         count =
1195             acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE, acpi_parse_int_src_ovr,
1196                                   nr_irqs);
1197         if (count < 0) {
1198                 printk(KERN_ERR PREFIX
1199                        "Error parsing interrupt source overrides entry\n");
1200                 /* TBD: Cleanup to allow fallback to MPS */
1201                 return count;
1202         }
1203
1204         /*
1205          * If BIOS did not supply an INT_SRC_OVR for the SCI
1206          * pretend we got one so we can set the SCI flags.
1207          */
1208         if (!acpi_sci_override_gsi)
1209                 acpi_sci_ioapic_setup(acpi_gbl_FADT.sci_interrupt, 0, 0,
1210                                       acpi_gbl_FADT.sci_interrupt);
1211
1212         /* Fill in identity legacy mappings where no override */
1213         mp_config_acpi_legacy_irqs();
1214
1215         count =
1216             acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE, acpi_parse_nmi_src,
1217                                   nr_irqs);
1218         if (count < 0) {
1219                 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n");
1220                 /* TBD: Cleanup to allow fallback to MPS */
1221                 return count;
1222         }
1223
1224         return 0;
1225 }
1226 #else
1227 static inline int acpi_parse_madt_ioapic_entries(void)
1228 {
1229         return -1;
1230 }
1231 #endif  /* !CONFIG_X86_IO_APIC */
1232
1233 static void __init early_acpi_process_madt(void)
1234 {
1235 #ifdef CONFIG_X86_LOCAL_APIC
1236         int error;
1237
1238         if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1239
1240                 /*
1241                  * Parse MADT LAPIC entries
1242                  */
1243                 error = early_acpi_parse_madt_lapic_addr_ovr();
1244                 if (!error) {
1245                         acpi_lapic = 1;
1246                         smp_found_config = 1;
1247                 }
1248                 if (error == -EINVAL) {
1249                         /*
1250                          * Dell Precision Workstation 410, 610 come here.
1251                          */
1252                         printk(KERN_ERR PREFIX
1253                                "Invalid BIOS MADT, disabling ACPI\n");
1254                         disable_acpi();
1255                 }
1256         }
1257 #endif
1258 }
1259
1260 static void __init acpi_process_madt(void)
1261 {
1262 #ifdef CONFIG_X86_LOCAL_APIC
1263         int error;
1264
1265         if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1266
1267                 /*
1268                  * Parse MADT LAPIC entries
1269                  */
1270                 error = acpi_parse_madt_lapic_entries();
1271                 if (!error) {
1272                         acpi_lapic = 1;
1273
1274                         /*
1275                          * Parse MADT IO-APIC entries
1276                          */
1277                         error = acpi_parse_madt_ioapic_entries();
1278                         if (!error) {
1279                                 acpi_set_irq_model_ioapic();
1280
1281                                 smp_found_config = 1;
1282                         }
1283                 }
1284                 if (error == -EINVAL) {
1285                         /*
1286                          * Dell Precision Workstation 410, 610 come here.
1287                          */
1288                         printk(KERN_ERR PREFIX
1289                                "Invalid BIOS MADT, disabling ACPI\n");
1290                         disable_acpi();
1291                 }
1292         } else {
1293                 /*
1294                  * ACPI found no MADT, and so ACPI wants UP PIC mode.
1295                  * In the event an MPS table was found, forget it.
1296                  * Boot with "acpi=off" to use MPS on such a system.
1297                  */
1298                 if (smp_found_config) {
1299                         printk(KERN_WARNING PREFIX
1300                                 "No APIC-table, disabling MPS\n");
1301                         smp_found_config = 0;
1302                 }
1303         }
1304
1305         /*
1306          * ACPI supports both logical (e.g. Hyper-Threading) and physical
1307          * processors, where MPS only supports physical.
1308          */
1309         if (acpi_lapic && acpi_ioapic)
1310                 printk(KERN_INFO "Using ACPI (MADT) for SMP configuration "
1311                        "information\n");
1312         else if (acpi_lapic)
1313                 printk(KERN_INFO "Using ACPI for processor (LAPIC) "
1314                        "configuration information\n");
1315 #endif
1316         return;
1317 }
1318
1319 static int __init disable_acpi_irq(const struct dmi_system_id *d)
1320 {
1321         if (!acpi_force) {
1322                 printk(KERN_NOTICE "%s detected: force use of acpi=noirq\n",
1323                        d->ident);
1324                 acpi_noirq_set();
1325         }
1326         return 0;
1327 }
1328
1329 static int __init disable_acpi_pci(const struct dmi_system_id *d)
1330 {
1331         if (!acpi_force) {
1332                 printk(KERN_NOTICE "%s detected: force use of pci=noacpi\n",
1333                        d->ident);
1334                 acpi_disable_pci();
1335         }
1336         return 0;
1337 }
1338
1339 static int __init dmi_disable_acpi(const struct dmi_system_id *d)
1340 {
1341         if (!acpi_force) {
1342                 printk(KERN_NOTICE "%s detected: acpi off\n", d->ident);
1343                 disable_acpi();
1344         } else {
1345                 printk(KERN_NOTICE
1346                        "Warning: DMI blacklist says broken, but acpi forced\n");
1347         }
1348         return 0;
1349 }
1350
1351 /*
1352  * Force ignoring BIOS IRQ0 override
1353  */
1354 static int __init dmi_ignore_irq0_timer_override(const struct dmi_system_id *d)
1355 {
1356         if (!acpi_skip_timer_override) {
1357                 pr_notice("%s detected: Ignoring BIOS IRQ0 override\n",
1358                         d->ident);
1359                 acpi_skip_timer_override = 1;
1360         }
1361         return 0;
1362 }
1363
1364 /*
1365  * If your system is blacklisted here, but you find that acpi=force
1366  * works for you, please contact linux-acpi@vger.kernel.org
1367  */
1368 static struct dmi_system_id __initdata acpi_dmi_table[] = {
1369         /*
1370          * Boxes that need ACPI disabled
1371          */
1372         {
1373          .callback = dmi_disable_acpi,
1374          .ident = "IBM Thinkpad",
1375          .matches = {
1376                      DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1377                      DMI_MATCH(DMI_BOARD_NAME, "2629H1G"),
1378                      },
1379          },
1380
1381         /*
1382          * Boxes that need ACPI PCI IRQ routing disabled
1383          */
1384         {
1385          .callback = disable_acpi_irq,
1386          .ident = "ASUS A7V",
1387          .matches = {
1388                      DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC"),
1389                      DMI_MATCH(DMI_BOARD_NAME, "<A7V>"),
1390                      /* newer BIOS, Revision 1011, does work */
1391                      DMI_MATCH(DMI_BIOS_VERSION,
1392                                "ASUS A7V ACPI BIOS Revision 1007"),
1393                      },
1394          },
1395         {
1396                 /*
1397                  * Latest BIOS for IBM 600E (1.16) has bad pcinum
1398                  * for LPC bridge, which is needed for the PCI
1399                  * interrupt links to work. DSDT fix is in bug 5966.
1400                  * 2645, 2646 model numbers are shared with 600/600E/600X
1401                  */
1402          .callback = disable_acpi_irq,
1403          .ident = "IBM Thinkpad 600 Series 2645",
1404          .matches = {
1405                      DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1406                      DMI_MATCH(DMI_BOARD_NAME, "2645"),
1407                      },
1408          },
1409         {
1410          .callback = disable_acpi_irq,
1411          .ident = "IBM Thinkpad 600 Series 2646",
1412          .matches = {
1413                      DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1414                      DMI_MATCH(DMI_BOARD_NAME, "2646"),
1415                      },
1416          },
1417         /*
1418          * Boxes that need ACPI PCI IRQ routing and PCI scan disabled
1419          */
1420         {                       /* _BBN 0 bug */
1421          .callback = disable_acpi_pci,
1422          .ident = "ASUS PR-DLS",
1423          .matches = {
1424                      DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1425                      DMI_MATCH(DMI_BOARD_NAME, "PR-DLS"),
1426                      DMI_MATCH(DMI_BIOS_VERSION,
1427                                "ASUS PR-DLS ACPI BIOS Revision 1010"),
1428                      DMI_MATCH(DMI_BIOS_DATE, "03/21/2003")
1429                      },
1430          },
1431         {
1432          .callback = disable_acpi_pci,
1433          .ident = "Acer TravelMate 36x Laptop",
1434          .matches = {
1435                      DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
1436                      DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"),
1437                      },
1438          },
1439         {}
1440 };
1441
1442 /* second table for DMI checks that should run after early-quirks */
1443 static struct dmi_system_id __initdata acpi_dmi_table_late[] = {
1444         /*
1445          * HP laptops which use a DSDT reporting as HP/SB400/10000,
1446          * which includes some code which overrides all temperature
1447          * trip points to 16C if the INTIN2 input of the I/O APIC
1448          * is enabled.  This input is incorrectly designated the
1449          * ISA IRQ 0 via an interrupt source override even though
1450          * it is wired to the output of the master 8259A and INTIN0
1451          * is not connected at all.  Force ignoring BIOS IRQ0
1452          * override in that cases.
1453          */
1454         {
1455          .callback = dmi_ignore_irq0_timer_override,
1456          .ident = "HP nx6115 laptop",
1457          .matches = {
1458                      DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1459                      DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6115"),
1460                      },
1461          },
1462         {
1463          .callback = dmi_ignore_irq0_timer_override,
1464          .ident = "HP NX6125 laptop",
1465          .matches = {
1466                      DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1467                      DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6125"),
1468                      },
1469          },
1470         {
1471          .callback = dmi_ignore_irq0_timer_override,
1472          .ident = "HP NX6325 laptop",
1473          .matches = {
1474                      DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1475                      DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6325"),
1476                      },
1477          },
1478         {
1479          .callback = dmi_ignore_irq0_timer_override,
1480          .ident = "HP 6715b laptop",
1481          .matches = {
1482                      DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1483                      DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq 6715b"),
1484                      },
1485          },
1486         {
1487          .callback = dmi_ignore_irq0_timer_override,
1488          .ident = "FUJITSU SIEMENS",
1489          .matches = {
1490                      DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
1491                      DMI_MATCH(DMI_PRODUCT_NAME, "AMILO PRO V2030"),
1492                      },
1493          },
1494         {}
1495 };
1496
1497 /*
1498  * acpi_boot_table_init() and acpi_boot_init()
1499  *  called from setup_arch(), always.
1500  *      1. checksums all tables
1501  *      2. enumerates lapics
1502  *      3. enumerates io-apics
1503  *
1504  * acpi_table_init() is separate to allow reading SRAT without
1505  * other side effects.
1506  *
1507  * side effects of acpi_boot_init:
1508  *      acpi_lapic = 1 if LAPIC found
1509  *      acpi_ioapic = 1 if IOAPIC found
1510  *      if (acpi_lapic && acpi_ioapic) smp_found_config = 1;
1511  *      if acpi_blacklisted() acpi_disabled = 1;
1512  *      acpi_irq_model=...
1513  *      ...
1514  */
1515
1516 void __init acpi_boot_table_init(void)
1517 {
1518         dmi_check_system(acpi_dmi_table);
1519
1520         /*
1521          * If acpi_disabled, bail out
1522          */
1523         if (acpi_disabled)
1524                 return;
1525
1526         /*
1527          * Initialize the ACPI boot-time table parser.
1528          */
1529         if (acpi_table_init()) {
1530                 disable_acpi();
1531                 return;
1532         }
1533
1534         acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1535
1536         /*
1537          * blacklist may disable ACPI entirely
1538          */
1539         if (acpi_blacklisted()) {
1540                 if (acpi_force) {
1541                         printk(KERN_WARNING PREFIX "acpi=force override\n");
1542                 } else {
1543                         printk(KERN_WARNING PREFIX "Disabling ACPI support\n");
1544                         disable_acpi();
1545                         return;
1546                 }
1547         }
1548 }
1549
1550 int __init early_acpi_boot_init(void)
1551 {
1552         /*
1553          * If acpi_disabled, bail out
1554          */
1555         if (acpi_disabled)
1556                 return 1;
1557
1558         /*
1559          * Process the Multiple APIC Description Table (MADT), if present
1560          */
1561         early_acpi_process_madt();
1562
1563         return 0;
1564 }
1565
1566 int __init acpi_boot_init(void)
1567 {
1568         /* those are executed after early-quirks are executed */
1569         dmi_check_system(acpi_dmi_table_late);
1570
1571         /*
1572          * If acpi_disabled, bail out
1573          */
1574         if (acpi_disabled)
1575                 return 1;
1576
1577         acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1578
1579         /*
1580          * set sci_int and PM timer address
1581          */
1582         acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt);
1583
1584         /*
1585          * Process the Multiple APIC Description Table (MADT), if present
1586          */
1587         acpi_process_madt();
1588
1589         acpi_table_parse(ACPI_SIG_HPET, acpi_parse_hpet);
1590
1591         if (!acpi_noirq)
1592                 x86_init.pci.init = pci_acpi_init;
1593
1594         return 0;
1595 }
1596
1597 static int __init parse_acpi(char *arg)
1598 {
1599         if (!arg)
1600                 return -EINVAL;
1601
1602         /* "acpi=off" disables both ACPI table parsing and interpreter */
1603         if (strcmp(arg, "off") == 0) {
1604                 disable_acpi();
1605         }
1606         /* acpi=force to over-ride black-list */
1607         else if (strcmp(arg, "force") == 0) {
1608                 acpi_force = 1;
1609                 acpi_disabled = 0;
1610         }
1611         /* acpi=strict disables out-of-spec workarounds */
1612         else if (strcmp(arg, "strict") == 0) {
1613                 acpi_strict = 1;
1614         }
1615         /* acpi=rsdt use RSDT instead of XSDT */
1616         else if (strcmp(arg, "rsdt") == 0) {
1617                 acpi_rsdt_forced = 1;
1618         }
1619         /* "acpi=noirq" disables ACPI interrupt routing */
1620         else if (strcmp(arg, "noirq") == 0) {
1621                 acpi_noirq_set();
1622         }
1623         /* "acpi=copy_dsdt" copys DSDT */
1624         else if (strcmp(arg, "copy_dsdt") == 0) {
1625                 acpi_gbl_copy_dsdt_locally = 1;
1626         }
1627         /* "acpi=nocmcff" disables FF mode for corrected errors */
1628         else if (strcmp(arg, "nocmcff") == 0) {
1629                 acpi_disable_cmcff = 1;
1630         } else {
1631                 /* Core will printk when we return error. */
1632                 return -EINVAL;
1633         }
1634         return 0;
1635 }
1636 early_param("acpi", parse_acpi);
1637
1638 /* FIXME: Using pci= for an ACPI parameter is a travesty. */
1639 static int __init parse_pci(char *arg)
1640 {
1641         if (arg && strcmp(arg, "noacpi") == 0)
1642                 acpi_disable_pci();
1643         return 0;
1644 }
1645 early_param("pci", parse_pci);
1646
1647 int __init acpi_mps_check(void)
1648 {
1649 #if defined(CONFIG_X86_LOCAL_APIC) && !defined(CONFIG_X86_MPPARSE)
1650 /* mptable code is not built-in*/
1651         if (acpi_disabled || acpi_noirq) {
1652                 printk(KERN_WARNING "MPS support code is not built-in.\n"
1653                        "Using acpi=off or acpi=noirq or pci=noacpi "
1654                        "may have problem\n");
1655                 return 1;
1656         }
1657 #endif
1658         return 0;
1659 }
1660
1661 #ifdef CONFIG_X86_IO_APIC
1662 static int __init parse_acpi_skip_timer_override(char *arg)
1663 {
1664         acpi_skip_timer_override = 1;
1665         return 0;
1666 }
1667 early_param("acpi_skip_timer_override", parse_acpi_skip_timer_override);
1668
1669 static int __init parse_acpi_use_timer_override(char *arg)
1670 {
1671         acpi_use_timer_override = 1;
1672         return 0;
1673 }
1674 early_param("acpi_use_timer_override", parse_acpi_use_timer_override);
1675 #endif /* CONFIG_X86_IO_APIC */
1676
1677 static int __init setup_acpi_sci(char *s)
1678 {
1679         if (!s)
1680                 return -EINVAL;
1681         if (!strcmp(s, "edge"))
1682                 acpi_sci_flags =  ACPI_MADT_TRIGGER_EDGE |
1683                         (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1684         else if (!strcmp(s, "level"))
1685                 acpi_sci_flags = ACPI_MADT_TRIGGER_LEVEL |
1686                         (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1687         else if (!strcmp(s, "high"))
1688                 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_HIGH |
1689                         (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1690         else if (!strcmp(s, "low"))
1691                 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_LOW |
1692                         (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1693         else
1694                 return -EINVAL;
1695         return 0;
1696 }
1697 early_param("acpi_sci", setup_acpi_sci);
1698
1699 int __acpi_acquire_global_lock(unsigned int *lock)
1700 {
1701         unsigned int old, new, val;
1702         do {
1703                 old = *lock;
1704                 new = (((old & ~0x3) + 2) + ((old >> 1) & 0x1));
1705                 val = cmpxchg(lock, old, new);
1706         } while (unlikely (val != old));
1707         return (new < 3) ? -1 : 0;
1708 }
1709
1710 int __acpi_release_global_lock(unsigned int *lock)
1711 {
1712         unsigned int old, new, val;
1713         do {
1714                 old = *lock;
1715                 new = old & ~0x3;
1716                 val = cmpxchg(lock, old, new);
1717         } while (unlikely (val != old));
1718         return old & 0x1;
1719 }
1720
1721 void __init arch_reserve_mem_area(acpi_physical_address addr, size_t size)
1722 {
1723         e820_add_region(addr, size, E820_ACPI);
1724         update_e820();
1725 }