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/export.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 #include <linux/efi-bgrt.h>
  39
  40 #include <asm/irqdomain.h>
  41 #include <asm/pci_x86.h>
  42 #include <asm/pgtable.h>
  43 #include <asm/io_apic.h>
  44 #include <asm/apic.h>
  45 #include <asm/io.h>
  46 #include <asm/mpspec.h>
  47 #include <asm/smp.h>
  48 #include <asm/i8259.h>
  49
  50 #include "sleep.h" /* To include x86_acpi_suspend_lowlevel */
  51 static int __initdata acpi_force = 0;
  52 int acpi_disabled;
  53 EXPORT_SYMBOL(acpi_disabled);
  54
  55 #ifdef  CONFIG_X86_64
  56 # include <asm/proto.h>
  57 #endif                          /* X86 */
  58
  59 #define PREFIX                  "ACPI: "
  60
  61 int acpi_noirq;                         /* skip ACPI IRQ initialization */
  62 int acpi_pci_disabled;          /* skip ACPI PCI scan and IRQ initialization */
  63 EXPORT_SYMBOL(acpi_pci_disabled);
  64
  65 int acpi_lapic;
  66 int acpi_ioapic;
  67 int acpi_strict;
  68 int acpi_disable_cmcff;
  69
  70 u8 acpi_sci_flags __initdata;
  71 int acpi_sci_override_gsi __initdata;
  72 int acpi_skip_timer_override __initdata;
  73 int acpi_use_timer_override __initdata;
  74 int acpi_fix_pin2_polarity __initdata;
  75
  76 #ifdef CONFIG_X86_LOCAL_APIC
  77 static u64 acpi_lapic_addr __initdata = APIC_DEFAULT_PHYS_BASE;
  78 #endif
  79
  80 #ifdef CONFIG_X86_IO_APIC
  81 /*
  82  * Locks related to IOAPIC hotplug
  83  * Hotplug side:
  84  *      ->device_hotplug_lock
  85  *              ->acpi_ioapic_lock
  86  *                      ->ioapic_lock
  87  * Interrupt mapping side:
  88  *      ->acpi_ioapic_lock
  89  *              ->ioapic_mutex
  90  *                      ->ioapic_lock
  91  */
  92 static DEFINE_MUTEX(acpi_ioapic_lock);
  93 #endif
  94
  95 /* --------------------------------------------------------------------------
  96                               Boot-time Configuration
  97    -------------------------------------------------------------------------- */
  98
  99 /*
 100  * The default interrupt routing model is PIC (8259).  This gets
 101  * overridden if IOAPICs are enumerated (below).
 102  */
 103 enum acpi_irq_model_id acpi_irq_model = ACPI_IRQ_MODEL_PIC;
 104
 105
 106 /*
 107  * ISA irqs by default are the first 16 gsis but can be
 108  * any gsi as specified by an interrupt source override.
 109  */
 110 static u32 isa_irq_to_gsi[NR_IRQS_LEGACY] __read_mostly = {
 111         0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15
 112 };
 113
 114 #define ACPI_INVALID_GSI                INT_MIN
 115
 116 /*
 117  * This is just a simple wrapper around early_ioremap(),
 118  * with sanity checks for phys == 0 and size == 0.
 119  */
 120 char *__init __acpi_map_table(unsigned long phys, unsigned long size)
 121 {
 122
 123         if (!phys || !size)
 124                 return NULL;
 125
 126         return early_ioremap(phys, size);
 127 }
 128
 129 void __init __acpi_unmap_table(char *map, unsigned long size)
 130 {
 131         if (!map || !size)
 132                 return;
 133
 134         early_iounmap(map, size);
 135 }
 136
 137 #ifdef CONFIG_X86_LOCAL_APIC
 138 static int __init acpi_parse_madt(struct acpi_table_header *table)
 139 {
 140         struct acpi_table_madt *madt = NULL;
 141
 142         if (!boot_cpu_has(X86_FEATURE_APIC))
 143                 return -EINVAL;
 144
 145         madt = (struct acpi_table_madt *)table;
 146         if (!madt) {
 147                 printk(KERN_WARNING PREFIX "Unable to map MADT\n");
 148                 return -ENODEV;
 149         }
 150
 151         if (madt->address) {
 152                 acpi_lapic_addr = (u64) madt->address;
 153
 154                 printk(KERN_DEBUG PREFIX "Local APIC address 0x%08x\n",
 155                        madt->address);
 156         }
 157
 158         default_acpi_madt_oem_check(madt->header.oem_id,
 159                                     madt->header.oem_table_id);
 160
 161         return 0;
 162 }
 163
 164 /**
 165  * acpi_register_lapic - register a local apic and generates a logic cpu number
 166  * @id: local apic id to register
 167  * @acpiid: ACPI id to register
 168  * @enabled: this cpu is enabled or not
 169  *
 170  * Returns the logic cpu number which maps to the local apic
 171  */
 172 static int acpi_register_lapic(int id, u32 acpiid, u8 enabled)
 173 {
 174         unsigned int ver = 0;
 175         int cpu;
 176
 177         if (id >= MAX_LOCAL_APIC) {
 178                 printk(KERN_INFO PREFIX "skipped apicid that is too big\n");
 179                 return -EINVAL;
 180         }
 181
 182         if (!enabled) {
 183                 ++disabled_cpus;
 184                 return -EINVAL;
 185         }
 186
 187         if (boot_cpu_physical_apicid != -1U)
 188                 ver = boot_cpu_apic_version;
 189
 190         cpu = generic_processor_info(id, ver);
 191         if (cpu >= 0)
 192                 early_per_cpu(x86_cpu_to_acpiid, cpu) = acpiid;
 193
 194         return cpu;
 195 }
 196
 197 static int __init
 198 acpi_parse_x2apic(struct acpi_subtable_header *header, const unsigned long end)
 199 {
 200         struct acpi_madt_local_x2apic *processor = NULL;
 201         int apic_id;
 202         u8 enabled;
 203
 204         processor = (struct acpi_madt_local_x2apic *)header;
 205
 206         if (BAD_MADT_ENTRY(processor, end))
 207                 return -EINVAL;
 208
 209         acpi_table_print_madt_entry(header);
 210
 211         apic_id = processor->local_apic_id;
 212         enabled = processor->lapic_flags & ACPI_MADT_ENABLED;
 213 #ifdef CONFIG_X86_X2APIC
 214         /*
 215          * We need to register disabled CPU as well to permit
 216          * counting disabled CPUs. This allows us to size
 217          * cpus_possible_map more accurately, to permit
 218          * to not preallocating memory for all NR_CPUS
 219          * when we use CPU hotplug.
 220          */
 221         if (!apic->apic_id_valid(apic_id) && enabled)
 222                 printk(KERN_WARNING PREFIX "x2apic entry ignored\n");
 223         else
 224                 acpi_register_lapic(apic_id, processor->uid, enabled);
 225 #else
 226         printk(KERN_WARNING PREFIX "x2apic entry ignored\n");
 227 #endif
 228
 229         return 0;
 230 }
 231
 232 static int __init
 233 acpi_parse_lapic(struct acpi_subtable_header * header, const unsigned long end)
 234 {
 235         struct acpi_madt_local_apic *processor = NULL;
 236
 237         processor = (struct acpi_madt_local_apic *)header;
 238
 239         if (BAD_MADT_ENTRY(processor, end))
 240                 return -EINVAL;
 241
 242         acpi_table_print_madt_entry(header);
 243
 244         /* Ignore invalid ID */
 245         if (processor->id == 0xff)
 246                 return 0;
 247
 248         /*
 249          * We need to register disabled CPU as well to permit
 250          * counting disabled CPUs. This allows us to size
 251          * cpus_possible_map more accurately, to permit
 252          * to not preallocating memory for all NR_CPUS
 253          * when we use CPU hotplug.
 254          */
 255         acpi_register_lapic(processor->id,      /* APIC ID */
 256                             processor->processor_id, /* ACPI ID */
 257                             processor->lapic_flags & ACPI_MADT_ENABLED);
 258
 259         return 0;
 260 }
 261
 262 static int __init
 263 acpi_parse_sapic(struct acpi_subtable_header *header, const unsigned long end)
 264 {
 265         struct acpi_madt_local_sapic *processor = NULL;
 266
 267         processor = (struct acpi_madt_local_sapic *)header;
 268
 269         if (BAD_MADT_ENTRY(processor, end))
 270                 return -EINVAL;
 271
 272         acpi_table_print_madt_entry(header);
 273
 274         acpi_register_lapic((processor->id << 8) | processor->eid,/* APIC ID */
 275                             processor->processor_id, /* ACPI ID */
 276                             processor->lapic_flags & ACPI_MADT_ENABLED);
 277
 278         return 0;
 279 }
 280
 281 static int __init
 282 acpi_parse_lapic_addr_ovr(struct acpi_subtable_header * header,
 283                           const unsigned long end)
 284 {
 285         struct acpi_madt_local_apic_override *lapic_addr_ovr = NULL;
 286
 287         lapic_addr_ovr = (struct acpi_madt_local_apic_override *)header;
 288
 289         if (BAD_MADT_ENTRY(lapic_addr_ovr, end))
 290                 return -EINVAL;
 291
 292         acpi_table_print_madt_entry(header);
 293
 294         acpi_lapic_addr = lapic_addr_ovr->address;
 295
 296         return 0;
 297 }
 298
 299 static int __init
 300 acpi_parse_x2apic_nmi(struct acpi_subtable_header *header,
 301                       const unsigned long end)
 302 {
 303         struct acpi_madt_local_x2apic_nmi *x2apic_nmi = NULL;
 304
 305         x2apic_nmi = (struct acpi_madt_local_x2apic_nmi *)header;
 306
 307         if (BAD_MADT_ENTRY(x2apic_nmi, end))
 308                 return -EINVAL;
 309
 310         acpi_table_print_madt_entry(header);
 311
 312         if (x2apic_nmi->lint != 1)
 313                 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n");
 314
 315         return 0;
 316 }
 317
 318 static int __init
 319 acpi_parse_lapic_nmi(struct acpi_subtable_header * header, const unsigned long end)
 320 {
 321         struct acpi_madt_local_apic_nmi *lapic_nmi = NULL;
 322
 323         lapic_nmi = (struct acpi_madt_local_apic_nmi *)header;
 324
 325         if (BAD_MADT_ENTRY(lapic_nmi, end))
 326                 return -EINVAL;
 327
 328         acpi_table_print_madt_entry(header);
 329
 330         if (lapic_nmi->lint != 1)
 331                 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n");
 332
 333         return 0;
 334 }
 335
 336 #endif                          /*CONFIG_X86_LOCAL_APIC */
 337
 338 #ifdef CONFIG_X86_IO_APIC
 339 #define MP_ISA_BUS              0
 340
 341 static void __init mp_override_legacy_irq(u8 bus_irq, u8 polarity, u8 trigger,
 342                                           u32 gsi)
 343 {
 344         int ioapic;
 345         int pin;
 346         struct mpc_intsrc mp_irq;
 347
 348         /*
 349          * Convert 'gsi' to 'ioapic.pin'.
 350          */
 351         ioapic = mp_find_ioapic(gsi);
 352         if (ioapic < 0)
 353                 return;
 354         pin = mp_find_ioapic_pin(ioapic, gsi);
 355
 356         /*
 357          * TBD: This check is for faulty timer entries, where the override
 358          *      erroneously sets the trigger to level, resulting in a HUGE
 359          *      increase of timer interrupts!
 360          */
 361         if ((bus_irq == 0) && (trigger == 3))
 362                 trigger = 1;
 363
 364         mp_irq.type = MP_INTSRC;
 365         mp_irq.irqtype = mp_INT;
 366         mp_irq.irqflag = (trigger << 2) | polarity;
 367         mp_irq.srcbus = MP_ISA_BUS;
 368         mp_irq.srcbusirq = bus_irq;     /* IRQ */
 369         mp_irq.dstapic = mpc_ioapic_id(ioapic); /* APIC ID */
 370         mp_irq.dstirq = pin;    /* INTIN# */
 371
 372         mp_save_irq(&mp_irq);
 373
 374         /*
 375          * Reset default identity mapping if gsi is also an legacy IRQ,
 376          * otherwise there will be more than one entry with the same GSI
 377          * and acpi_isa_irq_to_gsi() may give wrong result.
 378          */
 379         if (gsi < nr_legacy_irqs() && isa_irq_to_gsi[gsi] == gsi)
 380                 isa_irq_to_gsi[gsi] = ACPI_INVALID_GSI;
 381         isa_irq_to_gsi[bus_irq] = gsi;
 382 }
 383
 384 static int mp_config_acpi_gsi(struct device *dev, u32 gsi, int trigger,
 385                         int polarity)
 386 {
 387 #ifdef CONFIG_X86_MPPARSE
 388         struct mpc_intsrc mp_irq;
 389         struct pci_dev *pdev;
 390         unsigned char number;
 391         unsigned int devfn;
 392         int ioapic;
 393         u8 pin;
 394
 395         if (!acpi_ioapic)
 396                 return 0;
 397         if (!dev || !dev_is_pci(dev))
 398                 return 0;
 399
 400         pdev = to_pci_dev(dev);
 401         number = pdev->bus->number;
 402         devfn = pdev->devfn;
 403         pin = pdev->pin;
 404         /* print the entry should happen on mptable identically */
 405         mp_irq.type = MP_INTSRC;
 406         mp_irq.irqtype = mp_INT;
 407         mp_irq.irqflag = (trigger == ACPI_EDGE_SENSITIVE ? 4 : 0x0c) |
 408                                 (polarity == ACPI_ACTIVE_HIGH ? 1 : 3);
 409         mp_irq.srcbus = number;
 410         mp_irq.srcbusirq = (((devfn >> 3) & 0x1f) << 2) | ((pin - 1) & 3);
 411         ioapic = mp_find_ioapic(gsi);
 412         mp_irq.dstapic = mpc_ioapic_id(ioapic);
 413         mp_irq.dstirq = mp_find_ioapic_pin(ioapic, gsi);
 414
 415         mp_save_irq(&mp_irq);
 416 #endif
 417         return 0;
 418 }
 419
 420 static int __init
 421 acpi_parse_ioapic(struct acpi_subtable_header * header, const unsigned long end)
 422 {
 423         struct acpi_madt_io_apic *ioapic = NULL;
 424         struct ioapic_domain_cfg cfg = {
 425                 .type = IOAPIC_DOMAIN_DYNAMIC,
 426                 .ops = &mp_ioapic_irqdomain_ops,
 427         };
 428
 429         ioapic = (struct acpi_madt_io_apic *)header;
 430
 431         if (BAD_MADT_ENTRY(ioapic, end))
 432                 return -EINVAL;
 433
 434         acpi_table_print_madt_entry(header);
 435
 436         /* Statically assign IRQ numbers for IOAPICs hosting legacy IRQs */
 437         if (ioapic->global_irq_base < nr_legacy_irqs())
 438                 cfg.type = IOAPIC_DOMAIN_LEGACY;
 439
 440         mp_register_ioapic(ioapic->id, ioapic->address, ioapic->global_irq_base,
 441                            &cfg);
 442
 443         return 0;
 444 }
 445
 446 /*
 447  * Parse Interrupt Source Override for the ACPI SCI
 448  */
 449 static void __init acpi_sci_ioapic_setup(u8 bus_irq, u16 polarity, u16 trigger, u32 gsi)
 450 {
 451         if (trigger == 0)       /* compatible SCI trigger is level */
 452                 trigger = 3;
 453
 454         if (polarity == 0)      /* compatible SCI polarity is low */
 455                 polarity = 3;
 456
 457         /* Command-line over-ride via acpi_sci= */
 458         if (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK)
 459                 trigger = (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2;
 460
 461         if (acpi_sci_flags & ACPI_MADT_POLARITY_MASK)
 462                 polarity = acpi_sci_flags & ACPI_MADT_POLARITY_MASK;
 463
 464         mp_override_legacy_irq(bus_irq, polarity, trigger, gsi);
 465         acpi_penalize_sci_irq(bus_irq, trigger, polarity);
 466
 467         /*
 468          * stash over-ride to indicate we've been here
 469          * and for later update of acpi_gbl_FADT
 470          */
 471         acpi_sci_override_gsi = gsi;
 472         return;
 473 }
 474
 475 static int __init
 476 acpi_parse_int_src_ovr(struct acpi_subtable_header * header,
 477                        const unsigned long end)
 478 {
 479         struct acpi_madt_interrupt_override *intsrc = NULL;
 480
 481         intsrc = (struct acpi_madt_interrupt_override *)header;
 482
 483         if (BAD_MADT_ENTRY(intsrc, end))
 484                 return -EINVAL;
 485
 486         acpi_table_print_madt_entry(header);
 487
 488         if (intsrc->source_irq == acpi_gbl_FADT.sci_interrupt) {
 489                 acpi_sci_ioapic_setup(intsrc->source_irq,
 490                                       intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
 491                                       (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2,
 492                                       intsrc->global_irq);
 493                 return 0;
 494         }
 495
 496         if (intsrc->source_irq == 0) {
 497                 if (acpi_skip_timer_override) {
 498                         printk(PREFIX "BIOS IRQ0 override ignored.\n");
 499                         return 0;
 500                 }
 501
 502                 if ((intsrc->global_irq == 2) && acpi_fix_pin2_polarity
 503                         && (intsrc->inti_flags & ACPI_MADT_POLARITY_MASK)) {
 504                         intsrc->inti_flags &= ~ACPI_MADT_POLARITY_MASK;
 505                         printk(PREFIX "BIOS IRQ0 pin2 override: forcing polarity to high active.\n");
 506                 }
 507         }
 508
 509         mp_override_legacy_irq(intsrc->source_irq,
 510                                 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
 511                                 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2,
 512                                 intsrc->global_irq);
 513
 514         return 0;
 515 }
 516
 517 static int __init
 518 acpi_parse_nmi_src(struct acpi_subtable_header * header, const unsigned long end)
 519 {
 520         struct acpi_madt_nmi_source *nmi_src = NULL;
 521
 522         nmi_src = (struct acpi_madt_nmi_source *)header;
 523
 524         if (BAD_MADT_ENTRY(nmi_src, end))
 525                 return -EINVAL;
 526
 527         acpi_table_print_madt_entry(header);
 528
 529         /* TBD: Support nimsrc entries? */
 530
 531         return 0;
 532 }
 533
 534 #endif                          /* CONFIG_X86_IO_APIC */
 535
 536 /*
 537  * acpi_pic_sci_set_trigger()
 538  *
 539  * use ELCR to set PIC-mode trigger type for SCI
 540  *
 541  * If a PIC-mode SCI is not recognized or gives spurious IRQ7's
 542  * it may require Edge Trigger -- use "acpi_sci=edge"
 543  *
 544  * Port 0x4d0-4d1 are ECLR1 and ECLR2, the Edge/Level Control Registers
 545  * for the 8259 PIC.  bit[n] = 1 means irq[n] is Level, otherwise Edge.
 546  * ECLR1 is IRQs 0-7 (IRQ 0, 1, 2 must be 0)
 547  * ECLR2 is IRQs 8-15 (IRQ 8, 13 must be 0)
 548  */
 549
 550 void __init acpi_pic_sci_set_trigger(unsigned int irq, u16 trigger)
 551 {
 552         unsigned int mask = 1 << irq;
 553         unsigned int old, new;
 554
 555         /* Real old ELCR mask */
 556         old = inb(0x4d0) | (inb(0x4d1) << 8);
 557
 558         /*
 559          * If we use ACPI to set PCI IRQs, then we should clear ELCR
 560          * since we will set it correctly as we enable the PCI irq
 561          * routing.
 562          */
 563         new = acpi_noirq ? old : 0;
 564
 565         /*
 566          * Update SCI information in the ELCR, it isn't in the PCI
 567          * routing tables..
 568          */
 569         switch (trigger) {
 570         case 1:         /* Edge - clear */
 571                 new &= ~mask;
 572                 break;
 573         case 3:         /* Level - set */
 574                 new |= mask;
 575                 break;
 576         }
 577
 578         if (old == new)
 579                 return;
 580
 581         printk(PREFIX "setting ELCR to %04x (from %04x)\n", new, old);
 582         outb(new, 0x4d0);
 583         outb(new >> 8, 0x4d1);
 584 }
 585
 586 int acpi_gsi_to_irq(u32 gsi, unsigned int *irqp)
 587 {
 588         int rc, irq, trigger, polarity;
 589
 590         if (acpi_irq_model == ACPI_IRQ_MODEL_PIC) {
 591                 *irqp = gsi;
 592                 return 0;
 593         }
 594
 595         rc = acpi_get_override_irq(gsi, &trigger, &polarity);
 596         if (rc == 0) {
 597                 trigger = trigger ? ACPI_LEVEL_SENSITIVE : ACPI_EDGE_SENSITIVE;
 598                 polarity = polarity ? ACPI_ACTIVE_LOW : ACPI_ACTIVE_HIGH;
 599                 irq = acpi_register_gsi(NULL, gsi, trigger, polarity);
 600                 if (irq >= 0) {
 601                         *irqp = irq;
 602                         return 0;
 603                 }
 604         }
 605
 606         return -1;
 607 }
 608 EXPORT_SYMBOL_GPL(acpi_gsi_to_irq);
 609
 610 int acpi_isa_irq_to_gsi(unsigned isa_irq, u32 *gsi)
 611 {
 612         if (isa_irq < nr_legacy_irqs() &&
 613             isa_irq_to_gsi[isa_irq] != ACPI_INVALID_GSI) {
 614                 *gsi = isa_irq_to_gsi[isa_irq];
 615                 return 0;
 616         }
 617
 618         return -1;
 619 }
 620
 621 static int acpi_register_gsi_pic(struct device *dev, u32 gsi,
 622                                  int trigger, int polarity)
 623 {
 624 #ifdef CONFIG_PCI
 625         /*
 626          * Make sure all (legacy) PCI IRQs are set as level-triggered.
 627          */
 628         if (trigger == ACPI_LEVEL_SENSITIVE)
 629                 elcr_set_level_irq(gsi);
 630 #endif
 631
 632         return gsi;
 633 }
 634
 635 #ifdef CONFIG_X86_LOCAL_APIC
 636 static int acpi_register_gsi_ioapic(struct device *dev, u32 gsi,
 637                                     int trigger, int polarity)
 638 {
 639         int irq = gsi;
 640 #ifdef CONFIG_X86_IO_APIC
 641         int node;
 642         struct irq_alloc_info info;
 643
 644         node = dev ? dev_to_node(dev) : NUMA_NO_NODE;
 645         trigger = trigger == ACPI_EDGE_SENSITIVE ? 0 : 1;
 646         polarity = polarity == ACPI_ACTIVE_HIGH ? 0 : 1;
 647         ioapic_set_alloc_attr(&info, node, trigger, polarity);
 648
 649         mutex_lock(&acpi_ioapic_lock);
 650         irq = mp_map_gsi_to_irq(gsi, IOAPIC_MAP_ALLOC, &info);
 651         /* Don't set up the ACPI SCI because it's already set up */
 652         if (irq >= 0 && enable_update_mptable &&
 653             acpi_gbl_FADT.sci_interrupt != gsi)
 654                 mp_config_acpi_gsi(dev, gsi, trigger, polarity);
 655         mutex_unlock(&acpi_ioapic_lock);
 656 #endif
 657
 658         return irq;
 659 }
 660
 661 static void acpi_unregister_gsi_ioapic(u32 gsi)
 662 {
 663 #ifdef CONFIG_X86_IO_APIC
 664         int irq;
 665
 666         mutex_lock(&acpi_ioapic_lock);
 667         irq = mp_map_gsi_to_irq(gsi, 0, NULL);
 668         if (irq > 0)
 669                 mp_unmap_irq(irq);
 670         mutex_unlock(&acpi_ioapic_lock);
 671 #endif
 672 }
 673 #endif
 674
 675 int (*__acpi_register_gsi)(struct device *dev, u32 gsi,
 676                            int trigger, int polarity) = acpi_register_gsi_pic;
 677 void (*__acpi_unregister_gsi)(u32 gsi) = NULL;
 678
 679 #ifdef CONFIG_ACPI_SLEEP
 680 int (*acpi_suspend_lowlevel)(void) = x86_acpi_suspend_lowlevel;
 681 #else
 682 int (*acpi_suspend_lowlevel)(void);
 683 #endif
 684
 685 /*
 686  * success: return IRQ number (>=0)
 687  * failure: return < 0
 688  */
 689 int acpi_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity)
 690 {
 691         return __acpi_register_gsi(dev, gsi, trigger, polarity);
 692 }
 693 EXPORT_SYMBOL_GPL(acpi_register_gsi);
 694
 695 void acpi_unregister_gsi(u32 gsi)
 696 {
 697         if (__acpi_unregister_gsi)
 698                 __acpi_unregister_gsi(gsi);
 699 }
 700 EXPORT_SYMBOL_GPL(acpi_unregister_gsi);
 701
 702 #ifdef CONFIG_X86_LOCAL_APIC
 703 static void __init acpi_set_irq_model_ioapic(void)
 704 {
 705         acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC;
 706         __acpi_register_gsi = acpi_register_gsi_ioapic;
 707         __acpi_unregister_gsi = acpi_unregister_gsi_ioapic;
 708         acpi_ioapic = 1;
 709 }
 710 #endif
 711
 712 /*
 713  *  ACPI based hotplug support for CPU
 714  */
 715 #ifdef CONFIG_ACPI_HOTPLUG_CPU
 716 #include <acpi/processor.h>
 717
 718 static int acpi_map_cpu2node(acpi_handle handle, int cpu, int physid)
 719 {
 720 #ifdef CONFIG_ACPI_NUMA
 721         int nid;
 722
 723         nid = acpi_get_node(handle);
 724         if (nid != NUMA_NO_NODE) {
 725                 set_apicid_to_node(physid, nid);
 726                 numa_set_node(cpu, nid);
 727         }
 728 #endif
 729         return 0;
 730 }
 731
 732 int acpi_map_cpu(acpi_handle handle, phys_cpuid_t physid, u32 acpi_id,
 733                  int *pcpu)
 734 {
 735         int cpu;
 736
 737         cpu = acpi_register_lapic(physid, acpi_id, ACPI_MADT_ENABLED);
 738         if (cpu < 0) {
 739                 pr_info(PREFIX "Unable to map lapic to logical cpu number\n");
 740                 return cpu;
 741         }
 742
 743         acpi_processor_set_pdc(handle);
 744         acpi_map_cpu2node(handle, cpu, physid);
 745
 746         *pcpu = cpu;
 747         return 0;
 748 }
 749 EXPORT_SYMBOL(acpi_map_cpu);
 750
 751 int acpi_unmap_cpu(int cpu)
 752 {
 753 #ifdef CONFIG_ACPI_NUMA
 754         set_apicid_to_node(per_cpu(x86_cpu_to_apicid, cpu), NUMA_NO_NODE);
 755 #endif
 756
 757         per_cpu(x86_cpu_to_apicid, cpu) = -1;
 758         set_cpu_present(cpu, false);
 759         num_processors--;
 760
 761         return (0);
 762 }
 763 EXPORT_SYMBOL(acpi_unmap_cpu);
 764 #endif                          /* CONFIG_ACPI_HOTPLUG_CPU */
 765
 766 int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base)
 767 {
 768         int ret = -ENOSYS;
 769 #ifdef CONFIG_ACPI_HOTPLUG_IOAPIC
 770         int ioapic_id;
 771         u64 addr;
 772         struct ioapic_domain_cfg cfg = {
 773                 .type = IOAPIC_DOMAIN_DYNAMIC,
 774                 .ops = &mp_ioapic_irqdomain_ops,
 775         };
 776
 777         ioapic_id = acpi_get_ioapic_id(handle, gsi_base, &addr);
 778         if (ioapic_id < 0) {
 779                 unsigned long long uid;
 780                 acpi_status status;
 781
 782                 status = acpi_evaluate_integer(handle, METHOD_NAME__UID,
 783                                                NULL, &uid);
 784                 if (ACPI_FAILURE(status)) {
 785                         acpi_handle_warn(handle, "failed to get IOAPIC ID.\n");
 786                         return -EINVAL;
 787                 }
 788                 ioapic_id = (int)uid;
 789         }
 790
 791         mutex_lock(&acpi_ioapic_lock);
 792         ret  = mp_register_ioapic(ioapic_id, phys_addr, gsi_base, &cfg);
 793         mutex_unlock(&acpi_ioapic_lock);
 794 #endif
 795
 796         return ret;
 797 }
 798 EXPORT_SYMBOL(acpi_register_ioapic);
 799
 800 int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base)
 801 {
 802         int ret = -ENOSYS;
 803
 804 #ifdef CONFIG_ACPI_HOTPLUG_IOAPIC
 805         mutex_lock(&acpi_ioapic_lock);
 806         ret  = mp_unregister_ioapic(gsi_base);
 807         mutex_unlock(&acpi_ioapic_lock);
 808 #endif
 809
 810         return ret;
 811 }
 812 EXPORT_SYMBOL(acpi_unregister_ioapic);
 813
 814 /**
 815  * acpi_ioapic_registered - Check whether IOAPIC assoicatied with @gsi_base
 816  *                          has been registered
 817  * @handle:     ACPI handle of the IOAPIC deivce
 818  * @gsi_base:   GSI base associated with the IOAPIC
 819  *
 820  * Assume caller holds some type of lock to serialize acpi_ioapic_registered()
 821  * with acpi_register_ioapic()/acpi_unregister_ioapic().
 822  */
 823 int acpi_ioapic_registered(acpi_handle handle, u32 gsi_base)
 824 {
 825         int ret = 0;
 826
 827 #ifdef CONFIG_ACPI_HOTPLUG_IOAPIC
 828         mutex_lock(&acpi_ioapic_lock);
 829         ret  = mp_ioapic_registered(gsi_base);
 830         mutex_unlock(&acpi_ioapic_lock);
 831 #endif
 832
 833         return ret;
 834 }
 835
 836 static int __init acpi_parse_sbf(struct acpi_table_header *table)
 837 {
 838         struct acpi_table_boot *sb = (struct acpi_table_boot *)table;
 839
 840         sbf_port = sb->cmos_index;      /* Save CMOS port */
 841
 842         return 0;
 843 }
 844
 845 #ifdef CONFIG_HPET_TIMER
 846 #include <asm/hpet.h>
 847
 848 static struct resource *hpet_res __initdata;
 849
 850 static int __init acpi_parse_hpet(struct acpi_table_header *table)
 851 {
 852         struct acpi_table_hpet *hpet_tbl = (struct acpi_table_hpet *)table;
 853
 854         if (hpet_tbl->address.space_id != ACPI_SPACE_MEM) {
 855                 printk(KERN_WARNING PREFIX "HPET timers must be located in "
 856                        "memory.\n");
 857                 return -1;
 858         }
 859
 860         hpet_address = hpet_tbl->address.address;
 861         hpet_blockid = hpet_tbl->sequence;
 862
 863         /*
 864          * Some broken BIOSes advertise HPET at 0x0. We really do not
 865          * want to allocate a resource there.
 866          */
 867         if (!hpet_address) {
 868                 printk(KERN_WARNING PREFIX
 869                        "HPET id: %#x base: %#lx is invalid\n",
 870                        hpet_tbl->id, hpet_address);
 871                 return 0;
 872         }
 873 #ifdef CONFIG_X86_64
 874         /*
 875          * Some even more broken BIOSes advertise HPET at
 876          * 0xfed0000000000000 instead of 0xfed00000. Fix it up and add
 877          * some noise:
 878          */
 879         if (hpet_address == 0xfed0000000000000UL) {
 880                 if (!hpet_force_user) {
 881                         printk(KERN_WARNING PREFIX "HPET id: %#x "
 882                                "base: 0xfed0000000000000 is bogus\n "
 883                                "try hpet=force on the kernel command line to "
 884                                "fix it up to 0xfed00000.\n", hpet_tbl->id);
 885                         hpet_address = 0;
 886                         return 0;
 887                 }
 888                 printk(KERN_WARNING PREFIX
 889                        "HPET id: %#x base: 0xfed0000000000000 fixed up "
 890                        "to 0xfed00000.\n", hpet_tbl->id);
 891                 hpet_address >>= 32;
 892         }
 893 #endif
 894         printk(KERN_INFO PREFIX "HPET id: %#x base: %#lx\n",
 895                hpet_tbl->id, hpet_address);
 896
 897         /*
 898          * Allocate and initialize the HPET firmware resource for adding into
 899          * the resource tree during the lateinit timeframe.
 900          */
 901 #define HPET_RESOURCE_NAME_SIZE 9
 902         hpet_res = alloc_bootmem(sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE);
 903
 904         hpet_res->name = (void *)&hpet_res[1];
 905         hpet_res->flags = IORESOURCE_MEM;
 906         snprintf((char *)hpet_res->name, HPET_RESOURCE_NAME_SIZE, "HPET %u",
 907                  hpet_tbl->sequence);
 908
 909         hpet_res->start = hpet_address;
 910         hpet_res->end = hpet_address + (1 * 1024) - 1;
 911
 912         return 0;
 913 }
 914
 915 /*
 916  * hpet_insert_resource inserts the HPET resources used into the resource
 917  * tree.
 918  */
 919 static __init int hpet_insert_resource(void)
 920 {
 921         if (!hpet_res)
 922                 return 1;
 923
 924         return insert_resource(&iomem_resource, hpet_res);
 925 }
 926
 927 late_initcall(hpet_insert_resource);
 928
 929 #else
 930 #define acpi_parse_hpet NULL
 931 #endif
 932
 933 static int __init acpi_parse_fadt(struct acpi_table_header *table)
 934 {
 935         if (!(acpi_gbl_FADT.boot_flags & ACPI_FADT_LEGACY_DEVICES)) {
 936                 pr_debug("ACPI: no legacy devices present\n");
 937                 x86_platform.legacy.devices.pnpbios = 0;
 938         }
 939
 940         if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID &&
 941             !(acpi_gbl_FADT.boot_flags & ACPI_FADT_8042) &&
 942             x86_platform.legacy.i8042 != X86_LEGACY_I8042_PLATFORM_ABSENT) {
 943                 pr_debug("ACPI: i8042 controller is absent\n");
 944                 x86_platform.legacy.i8042 = X86_LEGACY_I8042_FIRMWARE_ABSENT;
 945         }
 946
 947         if (acpi_gbl_FADT.boot_flags & ACPI_FADT_NO_CMOS_RTC) {
 948                 pr_debug("ACPI: not registering RTC platform device\n");
 949                 x86_platform.legacy.rtc = 0;
 950         }
 951
 952 #ifdef CONFIG_X86_PM_TIMER
 953         /* detect the location of the ACPI PM Timer */
 954         if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID) {
 955                 /* FADT rev. 2 */
 956                 if (acpi_gbl_FADT.xpm_timer_block.space_id !=
 957                     ACPI_ADR_SPACE_SYSTEM_IO)
 958                         return 0;
 959
 960                 pmtmr_ioport = acpi_gbl_FADT.xpm_timer_block.address;
 961                 /*
 962                  * "X" fields are optional extensions to the original V1.0
 963                  * fields, so we must selectively expand V1.0 fields if the
 964                  * corresponding X field is zero.
 965                  */
 966                 if (!pmtmr_ioport)
 967                         pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
 968         } else {
 969                 /* FADT rev. 1 */
 970                 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
 971         }
 972         if (pmtmr_ioport)
 973                 printk(KERN_INFO PREFIX "PM-Timer IO Port: %#x\n",
 974                        pmtmr_ioport);
 975 #endif
 976         return 0;
 977 }
 978
 979 #ifdef  CONFIG_X86_LOCAL_APIC
 980 /*
 981  * Parse LAPIC entries in MADT
 982  * returns 0 on success, < 0 on error
 983  */
 984
 985 static int __init early_acpi_parse_madt_lapic_addr_ovr(void)
 986 {
 987         int count;
 988
 989         if (!boot_cpu_has(X86_FEATURE_APIC))
 990                 return -ENODEV;
 991
 992         /*
 993          * Note that the LAPIC address is obtained from the MADT (32-bit value)
 994          * and (optionally) overridden by a LAPIC_ADDR_OVR entry (64-bit value).
 995          */
 996
 997         count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
 998                                       acpi_parse_lapic_addr_ovr, 0);
 999         if (count < 0) {
1000                 printk(KERN_ERR PREFIX
1001                        "Error parsing LAPIC address override entry\n");
1002                 return count;
1003         }
1004
1005         register_lapic_address(acpi_lapic_addr);
1006
1007         return count;
1008 }
1009
1010 static int __init acpi_parse_madt_lapic_entries(void)
1011 {
1012         int count;
1013         int x2count = 0;
1014         int ret;
1015         struct acpi_subtable_proc madt_proc[2];
1016
1017         if (!boot_cpu_has(X86_FEATURE_APIC))
1018                 return -ENODEV;
1019
1020         count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC,
1021                                       acpi_parse_sapic, MAX_LOCAL_APIC);
1022
1023         if (!count) {
1024                 memset(madt_proc, 0, sizeof(madt_proc));
1025                 madt_proc[0].id = ACPI_MADT_TYPE_LOCAL_APIC;
1026                 madt_proc[0].handler = acpi_parse_lapic;
1027                 madt_proc[1].id = ACPI_MADT_TYPE_LOCAL_X2APIC;
1028                 madt_proc[1].handler = acpi_parse_x2apic;
1029                 ret = acpi_table_parse_entries_array(ACPI_SIG_MADT,
1030                                 sizeof(struct acpi_table_madt),
1031                                 madt_proc, ARRAY_SIZE(madt_proc), MAX_LOCAL_APIC);
1032                 if (ret < 0) {
1033                         printk(KERN_ERR PREFIX
1034                                         "Error parsing LAPIC/X2APIC entries\n");
1035                         return ret;
1036                 }
1037
1038                 count = madt_proc[0].count;
1039                 x2count = madt_proc[1].count;
1040         }
1041         if (!count && !x2count) {
1042                 printk(KERN_ERR PREFIX "No LAPIC entries present\n");
1043                 /* TBD: Cleanup to allow fallback to MPS */
1044                 return -ENODEV;
1045         } else if (count < 0 || x2count < 0) {
1046                 printk(KERN_ERR PREFIX "Error parsing LAPIC entry\n");
1047                 /* TBD: Cleanup to allow fallback to MPS */
1048                 return count;
1049         }
1050
1051         x2count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC_NMI,
1052                                         acpi_parse_x2apic_nmi, 0);
1053         count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI,
1054                                       acpi_parse_lapic_nmi, 0);
1055         if (count < 0 || x2count < 0) {
1056                 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n");
1057                 /* TBD: Cleanup to allow fallback to MPS */
1058                 return count;
1059         }
1060         return 0;
1061 }
1062 #endif                          /* CONFIG_X86_LOCAL_APIC */
1063
1064 #ifdef  CONFIG_X86_IO_APIC
1065 static void __init mp_config_acpi_legacy_irqs(void)
1066 {
1067         int i;
1068         struct mpc_intsrc mp_irq;
1069
1070 #ifdef CONFIG_EISA
1071         /*
1072          * Fabricate the legacy ISA bus (bus #31).
1073          */
1074         mp_bus_id_to_type[MP_ISA_BUS] = MP_BUS_ISA;
1075 #endif
1076         set_bit(MP_ISA_BUS, mp_bus_not_pci);
1077         pr_debug("Bus #%d is ISA\n", MP_ISA_BUS);
1078
1079         /*
1080          * Use the default configuration for the IRQs 0-15.  Unless
1081          * overridden by (MADT) interrupt source override entries.
1082          */
1083         for (i = 0; i < nr_legacy_irqs(); i++) {
1084                 int ioapic, pin;
1085                 unsigned int dstapic;
1086                 int idx;
1087                 u32 gsi;
1088
1089                 /* Locate the gsi that irq i maps to. */
1090                 if (acpi_isa_irq_to_gsi(i, &gsi))
1091                         continue;
1092
1093                 /*
1094                  * Locate the IOAPIC that manages the ISA IRQ.
1095                  */
1096                 ioapic = mp_find_ioapic(gsi);
1097                 if (ioapic < 0)
1098                         continue;
1099                 pin = mp_find_ioapic_pin(ioapic, gsi);
1100                 dstapic = mpc_ioapic_id(ioapic);
1101
1102                 for (idx = 0; idx < mp_irq_entries; idx++) {
1103                         struct mpc_intsrc *irq = mp_irqs + idx;
1104
1105                         /* Do we already have a mapping for this ISA IRQ? */
1106                         if (irq->srcbus == MP_ISA_BUS && irq->srcbusirq == i)
1107                                 break;
1108
1109                         /* Do we already have a mapping for this IOAPIC pin */
1110                         if (irq->dstapic == dstapic && irq->dstirq == pin)
1111                                 break;
1112                 }
1113
1114                 if (idx != mp_irq_entries) {
1115                         printk(KERN_DEBUG "ACPI: IRQ%d used by override.\n", i);
1116                         continue;       /* IRQ already used */
1117                 }
1118
1119                 mp_irq.type = MP_INTSRC;
1120                 mp_irq.irqflag = 0;     /* Conforming */
1121                 mp_irq.srcbus = MP_ISA_BUS;
1122                 mp_irq.dstapic = dstapic;
1123                 mp_irq.irqtype = mp_INT;
1124                 mp_irq.srcbusirq = i; /* Identity mapped */
1125                 mp_irq.dstirq = pin;
1126
1127                 mp_save_irq(&mp_irq);
1128         }
1129 }
1130
1131 /*
1132  * Parse IOAPIC related entries in MADT
1133  * returns 0 on success, < 0 on error
1134  */
1135 static int __init acpi_parse_madt_ioapic_entries(void)
1136 {
1137         int count;
1138
1139         /*
1140          * ACPI interpreter is required to complete interrupt setup,
1141          * so if it is off, don't enumerate the io-apics with ACPI.
1142          * If MPS is present, it will handle them,
1143          * otherwise the system will stay in PIC mode
1144          */
1145         if (acpi_disabled || acpi_noirq)
1146                 return -ENODEV;
1147
1148         if (!boot_cpu_has(X86_FEATURE_APIC))
1149                 return -ENODEV;
1150
1151         /*
1152          * if "noapic" boot option, don't look for IO-APICs
1153          */
1154         if (skip_ioapic_setup) {
1155                 printk(KERN_INFO PREFIX "Skipping IOAPIC probe "
1156                        "due to 'noapic' option.\n");
1157                 return -ENODEV;
1158         }
1159
1160         count = acpi_table_parse_madt(ACPI_MADT_TYPE_IO_APIC, acpi_parse_ioapic,
1161                                       MAX_IO_APICS);
1162         if (!count) {
1163                 printk(KERN_ERR PREFIX "No IOAPIC entries present\n");
1164                 return -ENODEV;
1165         } else if (count < 0) {
1166                 printk(KERN_ERR PREFIX "Error parsing IOAPIC entry\n");
1167                 return count;
1168         }
1169
1170         count = acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE,
1171                                       acpi_parse_int_src_ovr, nr_irqs);
1172         if (count < 0) {
1173                 printk(KERN_ERR PREFIX
1174                        "Error parsing interrupt source overrides entry\n");
1175                 /* TBD: Cleanup to allow fallback to MPS */
1176                 return count;
1177         }
1178
1179         /*
1180          * If BIOS did not supply an INT_SRC_OVR for the SCI
1181          * pretend we got one so we can set the SCI flags.
1182          */
1183         if (!acpi_sci_override_gsi)
1184                 acpi_sci_ioapic_setup(acpi_gbl_FADT.sci_interrupt, 0, 0,
1185                                       acpi_gbl_FADT.sci_interrupt);
1186
1187         /* Fill in identity legacy mappings where no override */
1188         mp_config_acpi_legacy_irqs();
1189
1190         count = acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE,
1191                                       acpi_parse_nmi_src, nr_irqs);
1192         if (count < 0) {
1193                 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n");
1194                 /* TBD: Cleanup to allow fallback to MPS */
1195                 return count;
1196         }
1197
1198         return 0;
1199 }
1200 #else
1201 static inline int acpi_parse_madt_ioapic_entries(void)
1202 {
1203         return -1;
1204 }
1205 #endif  /* !CONFIG_X86_IO_APIC */
1206
1207 static void __init early_acpi_process_madt(void)
1208 {
1209 #ifdef CONFIG_X86_LOCAL_APIC
1210         int error;
1211
1212         if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1213
1214                 /*
1215                  * Parse MADT LAPIC entries
1216                  */
1217                 error = early_acpi_parse_madt_lapic_addr_ovr();
1218                 if (!error) {
1219                         acpi_lapic = 1;
1220                         smp_found_config = 1;
1221                 }
1222                 if (error == -EINVAL) {
1223                         /*
1224                          * Dell Precision Workstation 410, 610 come here.
1225                          */
1226                         printk(KERN_ERR PREFIX
1227                                "Invalid BIOS MADT, disabling ACPI\n");
1228                         disable_acpi();
1229                 }
1230         }
1231 #endif
1232 }
1233
1234 static void __init acpi_process_madt(void)
1235 {
1236 #ifdef CONFIG_X86_LOCAL_APIC
1237         int error;
1238
1239         if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1240
1241                 /*
1242                  * Parse MADT LAPIC entries
1243                  */
1244                 error = acpi_parse_madt_lapic_entries();
1245                 if (!error) {
1246                         acpi_lapic = 1;
1247
1248                         /*
1249                          * Parse MADT IO-APIC entries
1250                          */
1251                         mutex_lock(&acpi_ioapic_lock);
1252                         error = acpi_parse_madt_ioapic_entries();
1253                         mutex_unlock(&acpi_ioapic_lock);
1254                         if (!error) {
1255                                 acpi_set_irq_model_ioapic();
1256
1257                                 smp_found_config = 1;
1258                         }
1259                 }
1260                 if (error == -EINVAL) {
1261                         /*
1262                          * Dell Precision Workstation 410, 610 come here.
1263                          */
1264                         printk(KERN_ERR PREFIX
1265                                "Invalid BIOS MADT, disabling ACPI\n");
1266                         disable_acpi();
1267                 }
1268         } else {
1269                 /*
1270                  * ACPI found no MADT, and so ACPI wants UP PIC mode.
1271                  * In the event an MPS table was found, forget it.
1272                  * Boot with "acpi=off" to use MPS on such a system.
1273                  */
1274                 if (smp_found_config) {
1275                         printk(KERN_WARNING PREFIX
1276                                 "No APIC-table, disabling MPS\n");
1277                         smp_found_config = 0;
1278                 }
1279         }
1280
1281         /*
1282          * ACPI supports both logical (e.g. Hyper-Threading) and physical
1283          * processors, where MPS only supports physical.
1284          */
1285         if (acpi_lapic && acpi_ioapic)
1286                 printk(KERN_INFO "Using ACPI (MADT) for SMP configuration "
1287                        "information\n");
1288         else if (acpi_lapic)
1289                 printk(KERN_INFO "Using ACPI for processor (LAPIC) "
1290                        "configuration information\n");
1291 #endif
1292         return;
1293 }
1294
1295 static int __init disable_acpi_irq(const struct dmi_system_id *d)
1296 {
1297         if (!acpi_force) {
1298                 printk(KERN_NOTICE "%s detected: force use of acpi=noirq\n",
1299                        d->ident);
1300                 acpi_noirq_set();
1301         }
1302         return 0;
1303 }
1304
1305 static int __init disable_acpi_pci(const struct dmi_system_id *d)
1306 {
1307         if (!acpi_force) {
1308                 printk(KERN_NOTICE "%s detected: force use of pci=noacpi\n",
1309                        d->ident);
1310                 acpi_disable_pci();
1311         }
1312         return 0;
1313 }
1314
1315 static int __init dmi_disable_acpi(const struct dmi_system_id *d)
1316 {
1317         if (!acpi_force) {
1318                 printk(KERN_NOTICE "%s detected: acpi off\n", d->ident);
1319                 disable_acpi();
1320         } else {
1321                 printk(KERN_NOTICE
1322                        "Warning: DMI blacklist says broken, but acpi forced\n");
1323         }
1324         return 0;
1325 }
1326
1327 /*
1328  * Force ignoring BIOS IRQ0 override
1329  */
1330 static int __init dmi_ignore_irq0_timer_override(const struct dmi_system_id *d)
1331 {
1332         if (!acpi_skip_timer_override) {
1333                 pr_notice("%s detected: Ignoring BIOS IRQ0 override\n",
1334                         d->ident);
1335                 acpi_skip_timer_override = 1;
1336         }
1337         return 0;
1338 }
1339
1340 /*
1341  * ACPI offers an alternative platform interface model that removes
1342  * ACPI hardware requirements for platforms that do not implement
1343  * the PC Architecture.
1344  *
1345  * We initialize the Hardware-reduced ACPI model here:
1346  */
1347 static void __init acpi_reduced_hw_init(void)
1348 {
1349         if (acpi_gbl_reduced_hardware) {
1350                 /*
1351                  * Override x86_init functions and bypass legacy pic
1352                  * in Hardware-reduced ACPI mode
1353                  */
1354                 x86_init.timers.timer_init      = x86_init_noop;
1355                 x86_init.irqs.pre_vector_init   = x86_init_noop;
1356                 legacy_pic                      = &null_legacy_pic;
1357         }
1358 }
1359
1360 /*
1361  * If your system is blacklisted here, but you find that acpi=force
1362  * works for you, please contact linux-acpi@vger.kernel.org
1363  */
1364 static struct dmi_system_id __initdata acpi_dmi_table[] = {
1365         /*
1366          * Boxes that need ACPI disabled
1367          */
1368         {
1369          .callback = dmi_disable_acpi,
1370          .ident = "IBM Thinkpad",
1371          .matches = {
1372                      DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1373                      DMI_MATCH(DMI_BOARD_NAME, "2629H1G"),
1374                      },
1375          },
1376
1377         /*
1378          * Boxes that need ACPI PCI IRQ routing disabled
1379          */
1380         {
1381          .callback = disable_acpi_irq,
1382          .ident = "ASUS A7V",
1383          .matches = {
1384                      DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC"),
1385                      DMI_MATCH(DMI_BOARD_NAME, "<A7V>"),
1386                      /* newer BIOS, Revision 1011, does work */
1387                      DMI_MATCH(DMI_BIOS_VERSION,
1388                                "ASUS A7V ACPI BIOS Revision 1007"),
1389                      },
1390          },
1391         {
1392                 /*
1393                  * Latest BIOS for IBM 600E (1.16) has bad pcinum
1394                  * for LPC bridge, which is needed for the PCI
1395                  * interrupt links to work. DSDT fix is in bug 5966.
1396                  * 2645, 2646 model numbers are shared with 600/600E/600X
1397                  */
1398          .callback = disable_acpi_irq,
1399          .ident = "IBM Thinkpad 600 Series 2645",
1400          .matches = {
1401                      DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1402                      DMI_MATCH(DMI_BOARD_NAME, "2645"),
1403                      },
1404          },
1405         {
1406          .callback = disable_acpi_irq,
1407          .ident = "IBM Thinkpad 600 Series 2646",
1408          .matches = {
1409                      DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1410                      DMI_MATCH(DMI_BOARD_NAME, "2646"),
1411                      },
1412          },
1413         /*
1414          * Boxes that need ACPI PCI IRQ routing and PCI scan disabled
1415          */
1416         {                       /* _BBN 0 bug */
1417          .callback = disable_acpi_pci,
1418          .ident = "ASUS PR-DLS",
1419          .matches = {
1420                      DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1421                      DMI_MATCH(DMI_BOARD_NAME, "PR-DLS"),
1422                      DMI_MATCH(DMI_BIOS_VERSION,
1423                                "ASUS PR-DLS ACPI BIOS Revision 1010"),
1424                      DMI_MATCH(DMI_BIOS_DATE, "03/21/2003")
1425                      },
1426          },
1427         {
1428          .callback = disable_acpi_pci,
1429          .ident = "Acer TravelMate 36x Laptop",
1430          .matches = {
1431                      DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
1432                      DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"),
1433                      },
1434          },
1435         {}
1436 };
1437
1438 /* second table for DMI checks that should run after early-quirks */
1439 static struct dmi_system_id __initdata acpi_dmi_table_late[] = {
1440         /*
1441          * HP laptops which use a DSDT reporting as HP/SB400/10000,
1442          * which includes some code which overrides all temperature
1443          * trip points to 16C if the INTIN2 input of the I/O APIC
1444          * is enabled.  This input is incorrectly designated the
1445          * ISA IRQ 0 via an interrupt source override even though
1446          * it is wired to the output of the master 8259A and INTIN0
1447          * is not connected at all.  Force ignoring BIOS IRQ0
1448          * override in that cases.
1449          */
1450         {
1451          .callback = dmi_ignore_irq0_timer_override,
1452          .ident = "HP nx6115 laptop",
1453          .matches = {
1454                      DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1455                      DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6115"),
1456                      },
1457          },
1458         {
1459          .callback = dmi_ignore_irq0_timer_override,
1460          .ident = "HP NX6125 laptop",
1461          .matches = {
1462                      DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1463                      DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6125"),
1464                      },
1465          },
1466         {
1467          .callback = dmi_ignore_irq0_timer_override,
1468          .ident = "HP NX6325 laptop",
1469          .matches = {
1470                      DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1471                      DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6325"),
1472                      },
1473          },
1474         {
1475          .callback = dmi_ignore_irq0_timer_override,
1476          .ident = "HP 6715b laptop",
1477          .matches = {
1478                      DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1479                      DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq 6715b"),
1480                      },
1481          },
1482         {
1483          .callback = dmi_ignore_irq0_timer_override,
1484          .ident = "FUJITSU SIEMENS",
1485          .matches = {
1486                      DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
1487                      DMI_MATCH(DMI_PRODUCT_NAME, "AMILO PRO V2030"),
1488                      },
1489          },
1490         {}
1491 };
1492
1493 /*
1494  * acpi_boot_table_init() and acpi_boot_init()
1495  *  called from setup_arch(), always.
1496  *      1. checksums all tables
1497  *      2. enumerates lapics
1498  *      3. enumerates io-apics
1499  *
1500  * acpi_table_init() is separate to allow reading SRAT without
1501  * other side effects.
1502  *
1503  * side effects of acpi_boot_init:
1504  *      acpi_lapic = 1 if LAPIC found
1505  *      acpi_ioapic = 1 if IOAPIC found
1506  *      if (acpi_lapic && acpi_ioapic) smp_found_config = 1;
1507  *      if acpi_blacklisted() acpi_disabled = 1;
1508  *      acpi_irq_model=...
1509  *      ...
1510  */
1511
1512 void __init acpi_boot_table_init(void)
1513 {
1514         dmi_check_system(acpi_dmi_table);
1515
1516         /*
1517          * If acpi_disabled, bail out
1518          */
1519         if (acpi_disabled)
1520                 return;
1521
1522         /*
1523          * Initialize the ACPI boot-time table parser.
1524          */
1525         if (acpi_table_init()) {
1526                 disable_acpi();
1527                 return;
1528         }
1529
1530         acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1531
1532         /*
1533          * blacklist may disable ACPI entirely
1534          */
1535         if (acpi_blacklisted()) {
1536                 if (acpi_force) {
1537                         printk(KERN_WARNING PREFIX "acpi=force override\n");
1538                 } else {
1539                         printk(KERN_WARNING PREFIX "Disabling ACPI support\n");
1540                         disable_acpi();
1541                         return;
1542                 }
1543         }
1544 }
1545
1546 int __init early_acpi_boot_init(void)
1547 {
1548         /*
1549          * If acpi_disabled, bail out
1550          */
1551         if (acpi_disabled)
1552                 return 1;
1553
1554         /*
1555          * Process the Multiple APIC Description Table (MADT), if present
1556          */
1557         early_acpi_process_madt();
1558
1559         /*
1560          * Hardware-reduced ACPI mode initialization:
1561          */
1562         acpi_reduced_hw_init();
1563
1564         return 0;
1565 }
1566
1567 static int __init acpi_parse_bgrt(struct acpi_table_header *table)
1568 {
1569         efi_bgrt_init(table);
1570         return 0;
1571 }
1572
1573 int __init acpi_boot_init(void)
1574 {
1575         /* those are executed after early-quirks are executed */
1576         dmi_check_system(acpi_dmi_table_late);
1577
1578         /*
1579          * If acpi_disabled, bail out
1580          */
1581         if (acpi_disabled)
1582                 return 1;
1583
1584         acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1585
1586         /*
1587          * set sci_int and PM timer address
1588          */
1589         acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt);
1590
1591         /*
1592          * Process the Multiple APIC Description Table (MADT), if present
1593          */
1594         acpi_process_madt();
1595
1596         acpi_table_parse(ACPI_SIG_HPET, acpi_parse_hpet);
1597         if (IS_ENABLED(CONFIG_ACPI_BGRT))
1598                 acpi_table_parse(ACPI_SIG_BGRT, acpi_parse_bgrt);
1599
1600         if (!acpi_noirq)
1601                 x86_init.pci.init = pci_acpi_init;
1602
1603         return 0;
1604 }
1605
1606 static int __init parse_acpi(char *arg)
1607 {
1608         if (!arg)
1609                 return -EINVAL;
1610
1611         /* "acpi=off" disables both ACPI table parsing and interpreter */
1612         if (strcmp(arg, "off") == 0) {
1613                 disable_acpi();
1614         }
1615         /* acpi=force to over-ride black-list */
1616         else if (strcmp(arg, "force") == 0) {
1617                 acpi_force = 1;
1618                 acpi_disabled = 0;
1619         }
1620         /* acpi=strict disables out-of-spec workarounds */
1621         else if (strcmp(arg, "strict") == 0) {
1622                 acpi_strict = 1;
1623         }
1624         /* acpi=rsdt use RSDT instead of XSDT */
1625         else if (strcmp(arg, "rsdt") == 0) {
1626                 acpi_gbl_do_not_use_xsdt = TRUE;
1627         }
1628         /* "acpi=noirq" disables ACPI interrupt routing */
1629         else if (strcmp(arg, "noirq") == 0) {
1630                 acpi_noirq_set();
1631         }
1632         /* "acpi=copy_dsdt" copys DSDT */
1633         else if (strcmp(arg, "copy_dsdt") == 0) {
1634                 acpi_gbl_copy_dsdt_locally = 1;
1635         }
1636         /* "acpi=nocmcff" disables FF mode for corrected errors */
1637         else if (strcmp(arg, "nocmcff") == 0) {
1638                 acpi_disable_cmcff = 1;
1639         } else {
1640                 /* Core will printk when we return error. */
1641                 return -EINVAL;
1642         }
1643         return 0;
1644 }
1645 early_param("acpi", parse_acpi);
1646
1647 /* FIXME: Using pci= for an ACPI parameter is a travesty. */
1648 static int __init parse_pci(char *arg)
1649 {
1650         if (arg && strcmp(arg, "noacpi") == 0)
1651                 acpi_disable_pci();
1652         return 0;
1653 }
1654 early_param("pci", parse_pci);
1655
1656 int __init acpi_mps_check(void)
1657 {
1658 #if defined(CONFIG_X86_LOCAL_APIC) && !defined(CONFIG_X86_MPPARSE)
1659 /* mptable code is not built-in*/
1660         if (acpi_disabled || acpi_noirq) {
1661                 printk(KERN_WARNING "MPS support code is not built-in.\n"
1662                        "Using acpi=off or acpi=noirq or pci=noacpi "
1663                        "may have problem\n");
1664                 return 1;
1665         }
1666 #endif
1667         return 0;
1668 }
1669
1670 #ifdef CONFIG_X86_IO_APIC
1671 static int __init parse_acpi_skip_timer_override(char *arg)
1672 {
1673         acpi_skip_timer_override = 1;
1674         return 0;
1675 }
1676 early_param("acpi_skip_timer_override", parse_acpi_skip_timer_override);
1677
1678 static int __init parse_acpi_use_timer_override(char *arg)
1679 {
1680         acpi_use_timer_override = 1;
1681         return 0;
1682 }
1683 early_param("acpi_use_timer_override", parse_acpi_use_timer_override);
1684 #endif /* CONFIG_X86_IO_APIC */
1685
1686 static int __init setup_acpi_sci(char *s)
1687 {
1688         if (!s)
1689                 return -EINVAL;
1690         if (!strcmp(s, "edge"))
1691                 acpi_sci_flags =  ACPI_MADT_TRIGGER_EDGE |
1692                         (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1693         else if (!strcmp(s, "level"))
1694                 acpi_sci_flags = ACPI_MADT_TRIGGER_LEVEL |
1695                         (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1696         else if (!strcmp(s, "high"))
1697                 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_HIGH |
1698                         (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1699         else if (!strcmp(s, "low"))
1700                 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_LOW |
1701                         (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1702         else
1703                 return -EINVAL;
1704         return 0;
1705 }
1706 early_param("acpi_sci", setup_acpi_sci);
1707
1708 int __acpi_acquire_global_lock(unsigned int *lock)
1709 {
1710         unsigned int old, new, val;
1711         do {
1712                 old = *lock;
1713                 new = (((old & ~0x3) + 2) + ((old >> 1) & 0x1));
1714                 val = cmpxchg(lock, old, new);
1715         } while (unlikely (val != old));
1716         return (new < 3) ? -1 : 0;
1717 }
1718
1719 int __acpi_release_global_lock(unsigned int *lock)
1720 {
1721         unsigned int old, new, val;
1722         do {
1723                 old = *lock;
1724                 new = old & ~0x3;
1725                 val = cmpxchg(lock, old, new);
1726         } while (unlikely (val != old));
1727         return old & 0x1;
1728 }
1729
1730 void __init arch_reserve_mem_area(acpi_physical_address addr, size_t size)
1731 {
1732         e820_add_region(addr, size, E820_ACPI);
1733         update_e820();
1734 }