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
  39 #include <asm/irqdomain.h>
  40 #include <asm/pci_x86.h>
  41 #include <asm/pgtable.h>
  42 #include <asm/io_apic.h>
  43 #include <asm/apic.h>
  44 #include <asm/io.h>
  45 #include <asm/mpspec.h>
  46 #include <asm/smp.h>
  47 #include <asm/i8259.h>
  48
  49 #include "sleep.h" /* To include x86_acpi_suspend_lowlevel */
  50 static int __initdata acpi_force = 0;
  51 int acpi_disabled;
  52 EXPORT_SYMBOL(acpi_disabled);
  53
  54 #ifdef  CONFIG_X86_64
  55 # include <asm/proto.h>
  56 #endif                          /* X86 */
  57
  58 #define PREFIX                  "ACPI: "
  59
  60 int acpi_noirq;                         /* skip ACPI IRQ initialization */
  61 int acpi_pci_disabled;          /* skip ACPI PCI scan and IRQ initialization */
  62 EXPORT_SYMBOL(acpi_pci_disabled);
  63
  64 int acpi_lapic;
  65 int acpi_ioapic;
  66 int acpi_strict;
  67 int acpi_disable_cmcff;
  68
  69 u8 acpi_sci_flags __initdata;
  70 int acpi_sci_override_gsi __initdata;
  71 int acpi_skip_timer_override __initdata;
  72 int acpi_use_timer_override __initdata;
  73 int acpi_fix_pin2_polarity __initdata;
  74
  75 #ifdef CONFIG_X86_LOCAL_APIC
  76 static u64 acpi_lapic_addr __initdata = APIC_DEFAULT_PHYS_BASE;
  77 #endif
  78
  79 /*
  80  * Locks related to IOAPIC hotplug
  81  * Hotplug side:
  82  *      ->device_hotplug_lock
  83  *              ->acpi_ioapic_lock
  84  *                      ->ioapic_lock
  85  * Interrupt mapping side:
  86  *      ->acpi_ioapic_lock
  87  *              ->ioapic_mutex
  88  *                      ->ioapic_lock
  89  */
  90 static DEFINE_MUTEX(acpi_ioapic_lock);
  91
  92 /* --------------------------------------------------------------------------
  93                               Boot-time Configuration
  94    -------------------------------------------------------------------------- */
  95
  96 /*
  97  * The default interrupt routing model is PIC (8259).  This gets
  98  * overridden if IOAPICs are enumerated (below).
  99  */
 100 enum acpi_irq_model_id acpi_irq_model = ACPI_IRQ_MODEL_PIC;
 101
 102
 103 /*
 104  * ISA irqs by default are the first 16 gsis but can be
 105  * any gsi as specified by an interrupt source override.
 106  */
 107 static u32 isa_irq_to_gsi[NR_IRQS_LEGACY] __read_mostly = {
 108         0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15
 109 };
 110
 111 #define ACPI_INVALID_GSI                INT_MIN
 112
 113 /*
 114  * This is just a simple wrapper around early_ioremap(),
 115  * with sanity checks for phys == 0 and size == 0.
 116  */
 117 char *__init __acpi_map_table(unsigned long phys, unsigned long size)
 118 {
 119
 120         if (!phys || !size)
 121                 return NULL;
 122
 123         return early_ioremap(phys, size);
 124 }
 125
 126 void __init __acpi_unmap_table(char *map, unsigned long size)
 127 {
 128         if (!map || !size)
 129                 return;
 130
 131         early_iounmap(map, size);
 132 }
 133
 134 #ifdef CONFIG_X86_LOCAL_APIC
 135 static int __init acpi_parse_madt(struct acpi_table_header *table)
 136 {
 137         struct acpi_table_madt *madt = NULL;
 138
 139         if (!boot_cpu_has(X86_FEATURE_APIC))
 140                 return -EINVAL;
 141
 142         madt = (struct acpi_table_madt *)table;
 143         if (!madt) {
 144                 printk(KERN_WARNING PREFIX "Unable to map MADT\n");
 145                 return -ENODEV;
 146         }
 147
 148         if (madt->address) {
 149                 acpi_lapic_addr = (u64) madt->address;
 150
 151                 printk(KERN_DEBUG PREFIX "Local APIC address 0x%08x\n",
 152                        madt->address);
 153         }
 154
 155         default_acpi_madt_oem_check(madt->header.oem_id,
 156                                     madt->header.oem_table_id);
 157
 158         return 0;
 159 }
 160
 161 /**
 162  * acpi_register_lapic - register a local apic and generates a logic cpu number
 163  * @id: local apic id to register
 164  * @acpiid: ACPI id to register
 165  * @enabled: this cpu is enabled or not
 166  *
 167  * Returns the logic cpu number which maps to the local apic
 168  */
 169 static int acpi_register_lapic(int id, u32 acpiid, u8 enabled)
 170 {
 171         unsigned int ver = 0;
 172         int cpu;
 173
 174         if (id >= MAX_LOCAL_APIC) {
 175                 printk(KERN_INFO PREFIX "skipped apicid that is too big\n");
 176                 return -EINVAL;
 177         }
 178
 179         if (boot_cpu_physical_apicid != -1U)
 180                 ver = boot_cpu_apic_version;
 181
 182         cpu = __generic_processor_info(id, ver, enabled);
 183         if (cpu >= 0)
 184                 early_per_cpu(x86_cpu_to_acpiid, cpu) = acpiid;
 185
 186         return cpu;
 187 }
 188
 189 static int __init
 190 acpi_parse_x2apic(struct acpi_subtable_header *header, const unsigned long end)
 191 {
 192         struct acpi_madt_local_x2apic *processor = NULL;
 193         int apic_id;
 194         u8 enabled;
 195
 196         processor = (struct acpi_madt_local_x2apic *)header;
 197
 198         if (BAD_MADT_ENTRY(processor, end))
 199                 return -EINVAL;
 200
 201         acpi_table_print_madt_entry(header);
 202
 203         apic_id = processor->local_apic_id;
 204         enabled = processor->lapic_flags & ACPI_MADT_ENABLED;
 205 #ifdef CONFIG_X86_X2APIC
 206         /*
 207          * We need to register disabled CPU as well to permit
 208          * counting disabled CPUs. This allows us to size
 209          * cpus_possible_map more accurately, to permit
 210          * to not preallocating memory for all NR_CPUS
 211          * when we use CPU hotplug.
 212          */
 213         if (!apic->apic_id_valid(apic_id) && enabled)
 214                 printk(KERN_WARNING PREFIX "x2apic entry ignored\n");
 215         else
 216                 acpi_register_lapic(apic_id, processor->uid, enabled);
 217 #else
 218         printk(KERN_WARNING PREFIX "x2apic entry ignored\n");
 219 #endif
 220
 221         return 0;
 222 }
 223
 224 static int __init
 225 acpi_parse_lapic(struct acpi_subtable_header * header, const unsigned long end)
 226 {
 227         struct acpi_madt_local_apic *processor = NULL;
 228
 229         processor = (struct acpi_madt_local_apic *)header;
 230
 231         if (BAD_MADT_ENTRY(processor, end))
 232                 return -EINVAL;
 233
 234         acpi_table_print_madt_entry(header);
 235
 236         /* Ignore invalid ID */
 237         if (processor->id == 0xff)
 238                 return 0;
 239
 240         /*
 241          * We need to register disabled CPU as well to permit
 242          * counting disabled CPUs. This allows us to size
 243          * cpus_possible_map more accurately, to permit
 244          * to not preallocating memory for all NR_CPUS
 245          * when we use CPU hotplug.
 246          */
 247         acpi_register_lapic(processor->id,      /* APIC ID */
 248                             processor->processor_id, /* ACPI ID */
 249                             processor->lapic_flags & ACPI_MADT_ENABLED);
 250
 251         return 0;
 252 }
 253
 254 static int __init
 255 acpi_parse_sapic(struct acpi_subtable_header *header, const unsigned long end)
 256 {
 257         struct acpi_madt_local_sapic *processor = NULL;
 258
 259         processor = (struct acpi_madt_local_sapic *)header;
 260
 261         if (BAD_MADT_ENTRY(processor, end))
 262                 return -EINVAL;
 263
 264         acpi_table_print_madt_entry(header);
 265
 266         acpi_register_lapic((processor->id << 8) | processor->eid,/* APIC ID */
 267                             processor->processor_id, /* ACPI ID */
 268                             processor->lapic_flags & ACPI_MADT_ENABLED);
 269
 270         return 0;
 271 }
 272
 273 static int __init
 274 acpi_parse_lapic_addr_ovr(struct acpi_subtable_header * header,
 275                           const unsigned long end)
 276 {
 277         struct acpi_madt_local_apic_override *lapic_addr_ovr = NULL;
 278
 279         lapic_addr_ovr = (struct acpi_madt_local_apic_override *)header;
 280
 281         if (BAD_MADT_ENTRY(lapic_addr_ovr, end))
 282                 return -EINVAL;
 283
 284         acpi_table_print_madt_entry(header);
 285
 286         acpi_lapic_addr = lapic_addr_ovr->address;
 287
 288         return 0;
 289 }
 290
 291 static int __init
 292 acpi_parse_x2apic_nmi(struct acpi_subtable_header *header,
 293                       const unsigned long end)
 294 {
 295         struct acpi_madt_local_x2apic_nmi *x2apic_nmi = NULL;
 296
 297         x2apic_nmi = (struct acpi_madt_local_x2apic_nmi *)header;
 298
 299         if (BAD_MADT_ENTRY(x2apic_nmi, end))
 300                 return -EINVAL;
 301
 302         acpi_table_print_madt_entry(header);
 303
 304         if (x2apic_nmi->lint != 1)
 305                 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n");
 306
 307         return 0;
 308 }
 309
 310 static int __init
 311 acpi_parse_lapic_nmi(struct acpi_subtable_header * header, const unsigned long end)
 312 {
 313         struct acpi_madt_local_apic_nmi *lapic_nmi = NULL;
 314
 315         lapic_nmi = (struct acpi_madt_local_apic_nmi *)header;
 316
 317         if (BAD_MADT_ENTRY(lapic_nmi, end))
 318                 return -EINVAL;
 319
 320         acpi_table_print_madt_entry(header);
 321
 322         if (lapic_nmi->lint != 1)
 323                 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n");
 324
 325         return 0;
 326 }
 327
 328 #endif                          /*CONFIG_X86_LOCAL_APIC */
 329
 330 #ifdef CONFIG_X86_IO_APIC
 331 #define MP_ISA_BUS              0
 332
 333 static void __init mp_override_legacy_irq(u8 bus_irq, u8 polarity, u8 trigger,
 334                                           u32 gsi)
 335 {
 336         int ioapic;
 337         int pin;
 338         struct mpc_intsrc mp_irq;
 339
 340         /*
 341          * Convert 'gsi' to 'ioapic.pin'.
 342          */
 343         ioapic = mp_find_ioapic(gsi);
 344         if (ioapic < 0)
 345                 return;
 346         pin = mp_find_ioapic_pin(ioapic, gsi);
 347
 348         /*
 349          * TBD: This check is for faulty timer entries, where the override
 350          *      erroneously sets the trigger to level, resulting in a HUGE
 351          *      increase of timer interrupts!
 352          */
 353         if ((bus_irq == 0) && (trigger == 3))
 354                 trigger = 1;
 355
 356         mp_irq.type = MP_INTSRC;
 357         mp_irq.irqtype = mp_INT;
 358         mp_irq.irqflag = (trigger << 2) | polarity;
 359         mp_irq.srcbus = MP_ISA_BUS;
 360         mp_irq.srcbusirq = bus_irq;     /* IRQ */
 361         mp_irq.dstapic = mpc_ioapic_id(ioapic); /* APIC ID */
 362         mp_irq.dstirq = pin;    /* INTIN# */
 363
 364         mp_save_irq(&mp_irq);
 365
 366         /*
 367          * Reset default identity mapping if gsi is also an legacy IRQ,
 368          * otherwise there will be more than one entry with the same GSI
 369          * and acpi_isa_irq_to_gsi() may give wrong result.
 370          */
 371         if (gsi < nr_legacy_irqs() && isa_irq_to_gsi[gsi] == gsi)
 372                 isa_irq_to_gsi[gsi] = ACPI_INVALID_GSI;
 373         isa_irq_to_gsi[bus_irq] = gsi;
 374 }
 375
 376 static int mp_config_acpi_gsi(struct device *dev, u32 gsi, int trigger,
 377                         int polarity)
 378 {
 379 #ifdef CONFIG_X86_MPPARSE
 380         struct mpc_intsrc mp_irq;
 381         struct pci_dev *pdev;
 382         unsigned char number;
 383         unsigned int devfn;
 384         int ioapic;
 385         u8 pin;
 386
 387         if (!acpi_ioapic)
 388                 return 0;
 389         if (!dev || !dev_is_pci(dev))
 390                 return 0;
 391
 392         pdev = to_pci_dev(dev);
 393         number = pdev->bus->number;
 394         devfn = pdev->devfn;
 395         pin = pdev->pin;
 396         /* print the entry should happen on mptable identically */
 397         mp_irq.type = MP_INTSRC;
 398         mp_irq.irqtype = mp_INT;
 399         mp_irq.irqflag = (trigger == ACPI_EDGE_SENSITIVE ? 4 : 0x0c) |
 400                                 (polarity == ACPI_ACTIVE_HIGH ? 1 : 3);
 401         mp_irq.srcbus = number;
 402         mp_irq.srcbusirq = (((devfn >> 3) & 0x1f) << 2) | ((pin - 1) & 3);
 403         ioapic = mp_find_ioapic(gsi);
 404         mp_irq.dstapic = mpc_ioapic_id(ioapic);
 405         mp_irq.dstirq = mp_find_ioapic_pin(ioapic, gsi);
 406
 407         mp_save_irq(&mp_irq);
 408 #endif
 409         return 0;
 410 }
 411
 412 static int __init
 413 acpi_parse_ioapic(struct acpi_subtable_header * header, const unsigned long end)
 414 {
 415         struct acpi_madt_io_apic *ioapic = NULL;
 416         struct ioapic_domain_cfg cfg = {
 417                 .type = IOAPIC_DOMAIN_DYNAMIC,
 418                 .ops = &mp_ioapic_irqdomain_ops,
 419         };
 420
 421         ioapic = (struct acpi_madt_io_apic *)header;
 422
 423         if (BAD_MADT_ENTRY(ioapic, end))
 424                 return -EINVAL;
 425
 426         acpi_table_print_madt_entry(header);
 427
 428         /* Statically assign IRQ numbers for IOAPICs hosting legacy IRQs */
 429         if (ioapic->global_irq_base < nr_legacy_irqs())
 430                 cfg.type = IOAPIC_DOMAIN_LEGACY;
 431
 432         mp_register_ioapic(ioapic->id, ioapic->address, ioapic->global_irq_base,
 433                            &cfg);
 434
 435         return 0;
 436 }
 437
 438 /*
 439  * Parse Interrupt Source Override for the ACPI SCI
 440  */
 441 static void __init acpi_sci_ioapic_setup(u8 bus_irq, u16 polarity, u16 trigger, u32 gsi)
 442 {
 443         if (trigger == 0)       /* compatible SCI trigger is level */
 444                 trigger = 3;
 445
 446         if (polarity == 0)      /* compatible SCI polarity is low */
 447                 polarity = 3;
 448
 449         /* Command-line over-ride via acpi_sci= */
 450         if (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK)
 451                 trigger = (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2;
 452
 453         if (acpi_sci_flags & ACPI_MADT_POLARITY_MASK)
 454                 polarity = acpi_sci_flags & ACPI_MADT_POLARITY_MASK;
 455
 456         mp_override_legacy_irq(bus_irq, polarity, trigger, gsi);
 457         acpi_penalize_sci_irq(bus_irq, trigger, polarity);
 458
 459         /*
 460          * stash over-ride to indicate we've been here
 461          * and for later update of acpi_gbl_FADT
 462          */
 463         acpi_sci_override_gsi = gsi;
 464         return;
 465 }
 466
 467 static int __init
 468 acpi_parse_int_src_ovr(struct acpi_subtable_header * header,
 469                        const unsigned long end)
 470 {
 471         struct acpi_madt_interrupt_override *intsrc = NULL;
 472
 473         intsrc = (struct acpi_madt_interrupt_override *)header;
 474
 475         if (BAD_MADT_ENTRY(intsrc, end))
 476                 return -EINVAL;
 477
 478         acpi_table_print_madt_entry(header);
 479
 480         if (intsrc->source_irq == acpi_gbl_FADT.sci_interrupt) {
 481                 acpi_sci_ioapic_setup(intsrc->source_irq,
 482                                       intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
 483                                       (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2,
 484                                       intsrc->global_irq);
 485                 return 0;
 486         }
 487
 488         if (intsrc->source_irq == 0) {
 489                 if (acpi_skip_timer_override) {
 490                         printk(PREFIX "BIOS IRQ0 override ignored.\n");
 491                         return 0;
 492                 }
 493
 494                 if ((intsrc->global_irq == 2) && acpi_fix_pin2_polarity
 495                         && (intsrc->inti_flags & ACPI_MADT_POLARITY_MASK)) {
 496                         intsrc->inti_flags &= ~ACPI_MADT_POLARITY_MASK;
 497                         printk(PREFIX "BIOS IRQ0 pin2 override: forcing polarity to high active.\n");
 498                 }
 499         }
 500
 501         mp_override_legacy_irq(intsrc->source_irq,
 502                                 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
 503                                 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2,
 504                                 intsrc->global_irq);
 505
 506         return 0;
 507 }
 508
 509 static int __init
 510 acpi_parse_nmi_src(struct acpi_subtable_header * header, const unsigned long end)
 511 {
 512         struct acpi_madt_nmi_source *nmi_src = NULL;
 513
 514         nmi_src = (struct acpi_madt_nmi_source *)header;
 515
 516         if (BAD_MADT_ENTRY(nmi_src, end))
 517                 return -EINVAL;
 518
 519         acpi_table_print_madt_entry(header);
 520
 521         /* TBD: Support nimsrc entries? */
 522
 523         return 0;
 524 }
 525
 526 #endif                          /* CONFIG_X86_IO_APIC */
 527
 528 /*
 529  * acpi_pic_sci_set_trigger()
 530  *
 531  * use ELCR to set PIC-mode trigger type for SCI
 532  *
 533  * If a PIC-mode SCI is not recognized or gives spurious IRQ7's
 534  * it may require Edge Trigger -- use "acpi_sci=edge"
 535  *
 536  * Port 0x4d0-4d1 are ECLR1 and ECLR2, the Edge/Level Control Registers
 537  * for the 8259 PIC.  bit[n] = 1 means irq[n] is Level, otherwise Edge.
 538  * ECLR1 is IRQs 0-7 (IRQ 0, 1, 2 must be 0)
 539  * ECLR2 is IRQs 8-15 (IRQ 8, 13 must be 0)
 540  */
 541
 542 void __init acpi_pic_sci_set_trigger(unsigned int irq, u16 trigger)
 543 {
 544         unsigned int mask = 1 << irq;
 545         unsigned int old, new;
 546
 547         /* Real old ELCR mask */
 548         old = inb(0x4d0) | (inb(0x4d1) << 8);
 549
 550         /*
 551          * If we use ACPI to set PCI IRQs, then we should clear ELCR
 552          * since we will set it correctly as we enable the PCI irq
 553          * routing.
 554          */
 555         new = acpi_noirq ? old : 0;
 556
 557         /*
 558          * Update SCI information in the ELCR, it isn't in the PCI
 559          * routing tables..
 560          */
 561         switch (trigger) {
 562         case 1:         /* Edge - clear */
 563                 new &= ~mask;
 564                 break;
 565         case 3:         /* Level - set */
 566                 new |= mask;
 567                 break;
 568         }
 569
 570         if (old == new)
 571                 return;
 572
 573         printk(PREFIX "setting ELCR to %04x (from %04x)\n", new, old);
 574         outb(new, 0x4d0);
 575         outb(new >> 8, 0x4d1);
 576 }
 577
 578 int acpi_gsi_to_irq(u32 gsi, unsigned int *irqp)
 579 {
 580         int rc, irq, trigger, polarity;
 581
 582         if (acpi_irq_model == ACPI_IRQ_MODEL_PIC) {
 583                 *irqp = gsi;
 584                 return 0;
 585         }
 586
 587         rc = acpi_get_override_irq(gsi, &trigger, &polarity);
 588         if (rc == 0) {
 589                 trigger = trigger ? ACPI_LEVEL_SENSITIVE : ACPI_EDGE_SENSITIVE;
 590                 polarity = polarity ? ACPI_ACTIVE_LOW : ACPI_ACTIVE_HIGH;
 591                 irq = acpi_register_gsi(NULL, gsi, trigger, polarity);
 592                 if (irq >= 0) {
 593                         *irqp = irq;
 594                         return 0;
 595                 }
 596         }
 597
 598         return -1;
 599 }
 600 EXPORT_SYMBOL_GPL(acpi_gsi_to_irq);
 601
 602 int acpi_isa_irq_to_gsi(unsigned isa_irq, u32 *gsi)
 603 {
 604         if (isa_irq < nr_legacy_irqs() &&
 605             isa_irq_to_gsi[isa_irq] != ACPI_INVALID_GSI) {
 606                 *gsi = isa_irq_to_gsi[isa_irq];
 607                 return 0;
 608         }
 609
 610         return -1;
 611 }
 612
 613 static int acpi_register_gsi_pic(struct device *dev, u32 gsi,
 614                                  int trigger, int polarity)
 615 {
 616 #ifdef CONFIG_PCI
 617         /*
 618          * Make sure all (legacy) PCI IRQs are set as level-triggered.
 619          */
 620         if (trigger == ACPI_LEVEL_SENSITIVE)
 621                 elcr_set_level_irq(gsi);
 622 #endif
 623
 624         return gsi;
 625 }
 626
 627 #ifdef CONFIG_X86_LOCAL_APIC
 628 static int acpi_register_gsi_ioapic(struct device *dev, u32 gsi,
 629                                     int trigger, int polarity)
 630 {
 631         int irq = gsi;
 632 #ifdef CONFIG_X86_IO_APIC
 633         int node;
 634         struct irq_alloc_info info;
 635
 636         node = dev ? dev_to_node(dev) : NUMA_NO_NODE;
 637         trigger = trigger == ACPI_EDGE_SENSITIVE ? 0 : 1;
 638         polarity = polarity == ACPI_ACTIVE_HIGH ? 0 : 1;
 639         ioapic_set_alloc_attr(&info, node, trigger, polarity);
 640
 641         mutex_lock(&acpi_ioapic_lock);
 642         irq = mp_map_gsi_to_irq(gsi, IOAPIC_MAP_ALLOC, &info);
 643         /* Don't set up the ACPI SCI because it's already set up */
 644         if (irq >= 0 && enable_update_mptable &&
 645             acpi_gbl_FADT.sci_interrupt != gsi)
 646                 mp_config_acpi_gsi(dev, gsi, trigger, polarity);
 647         mutex_unlock(&acpi_ioapic_lock);
 648 #endif
 649
 650         return irq;
 651 }
 652
 653 static void acpi_unregister_gsi_ioapic(u32 gsi)
 654 {
 655 #ifdef CONFIG_X86_IO_APIC
 656         int irq;
 657
 658         mutex_lock(&acpi_ioapic_lock);
 659         irq = mp_map_gsi_to_irq(gsi, 0, NULL);
 660         if (irq > 0)
 661                 mp_unmap_irq(irq);
 662         mutex_unlock(&acpi_ioapic_lock);
 663 #endif
 664 }
 665 #endif
 666
 667 int (*__acpi_register_gsi)(struct device *dev, u32 gsi,
 668                            int trigger, int polarity) = acpi_register_gsi_pic;
 669 void (*__acpi_unregister_gsi)(u32 gsi) = NULL;
 670
 671 #ifdef CONFIG_ACPI_SLEEP
 672 int (*acpi_suspend_lowlevel)(void) = x86_acpi_suspend_lowlevel;
 673 #else
 674 int (*acpi_suspend_lowlevel)(void);
 675 #endif
 676
 677 /*
 678  * success: return IRQ number (>=0)
 679  * failure: return < 0
 680  */
 681 int acpi_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity)
 682 {
 683         return __acpi_register_gsi(dev, gsi, trigger, polarity);
 684 }
 685 EXPORT_SYMBOL_GPL(acpi_register_gsi);
 686
 687 void acpi_unregister_gsi(u32 gsi)
 688 {
 689         if (__acpi_unregister_gsi)
 690                 __acpi_unregister_gsi(gsi);
 691 }
 692 EXPORT_SYMBOL_GPL(acpi_unregister_gsi);
 693
 694 #ifdef CONFIG_X86_LOCAL_APIC
 695 static void __init acpi_set_irq_model_ioapic(void)
 696 {
 697         acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC;
 698         __acpi_register_gsi = acpi_register_gsi_ioapic;
 699         __acpi_unregister_gsi = acpi_unregister_gsi_ioapic;
 700         acpi_ioapic = 1;
 701 }
 702 #endif
 703
 704 /*
 705  *  ACPI based hotplug support for CPU
 706  */
 707 #ifdef CONFIG_ACPI_HOTPLUG_CPU
 708 #include <acpi/processor.h>
 709
 710 int acpi_map_cpu2node(acpi_handle handle, int cpu, int physid)
 711 {
 712 #ifdef CONFIG_ACPI_NUMA
 713         int nid;
 714
 715         nid = acpi_get_node(handle);
 716         if (nid != -1) {
 717                 set_apicid_to_node(physid, nid);
 718                 numa_set_node(cpu, nid);
 719         }
 720 #endif
 721         return 0;
 722 }
 723
 724 int acpi_map_cpu(acpi_handle handle, phys_cpuid_t physid, int *pcpu)
 725 {
 726         int cpu;
 727
 728         cpu = acpi_register_lapic(physid, U32_MAX, ACPI_MADT_ENABLED);
 729         if (cpu < 0) {
 730                 pr_info(PREFIX "Unable to map lapic to logical cpu number\n");
 731                 return cpu;
 732         }
 733
 734         acpi_processor_set_pdc(handle);
 735         acpi_map_cpu2node(handle, cpu, physid);
 736
 737         *pcpu = cpu;
 738         return 0;
 739 }
 740 EXPORT_SYMBOL(acpi_map_cpu);
 741
 742 int acpi_unmap_cpu(int cpu)
 743 {
 744 #ifdef CONFIG_ACPI_NUMA
 745         set_apicid_to_node(per_cpu(x86_cpu_to_apicid, cpu), NUMA_NO_NODE);
 746 #endif
 747
 748         per_cpu(x86_cpu_to_apicid, cpu) = -1;
 749         set_cpu_present(cpu, false);
 750         num_processors--;
 751
 752         return (0);
 753 }
 754 EXPORT_SYMBOL(acpi_unmap_cpu);
 755 #endif                          /* CONFIG_ACPI_HOTPLUG_CPU */
 756
 757 int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base)
 758 {
 759         int ret = -ENOSYS;
 760 #ifdef CONFIG_ACPI_HOTPLUG_IOAPIC
 761         int ioapic_id;
 762         u64 addr;
 763         struct ioapic_domain_cfg cfg = {
 764                 .type = IOAPIC_DOMAIN_DYNAMIC,
 765                 .ops = &mp_ioapic_irqdomain_ops,
 766         };
 767
 768         ioapic_id = acpi_get_ioapic_id(handle, gsi_base, &addr);
 769         if (ioapic_id < 0) {
 770                 unsigned long long uid;
 771                 acpi_status status;
 772
 773                 status = acpi_evaluate_integer(handle, METHOD_NAME__UID,
 774                                                NULL, &uid);
 775                 if (ACPI_FAILURE(status)) {
 776                         acpi_handle_warn(handle, "failed to get IOAPIC ID.\n");
 777                         return -EINVAL;
 778                 }
 779                 ioapic_id = (int)uid;
 780         }
 781
 782         mutex_lock(&acpi_ioapic_lock);
 783         ret  = mp_register_ioapic(ioapic_id, phys_addr, gsi_base, &cfg);
 784         mutex_unlock(&acpi_ioapic_lock);
 785 #endif
 786
 787         return ret;
 788 }
 789 EXPORT_SYMBOL(acpi_register_ioapic);
 790
 791 int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base)
 792 {
 793         int ret = -ENOSYS;
 794
 795 #ifdef CONFIG_ACPI_HOTPLUG_IOAPIC
 796         mutex_lock(&acpi_ioapic_lock);
 797         ret  = mp_unregister_ioapic(gsi_base);
 798         mutex_unlock(&acpi_ioapic_lock);
 799 #endif
 800
 801         return ret;
 802 }
 803 EXPORT_SYMBOL(acpi_unregister_ioapic);
 804
 805 /**
 806  * acpi_ioapic_registered - Check whether IOAPIC assoicatied with @gsi_base
 807  *                          has been registered
 808  * @handle:     ACPI handle of the IOAPIC deivce
 809  * @gsi_base:   GSI base associated with the IOAPIC
 810  *
 811  * Assume caller holds some type of lock to serialize acpi_ioapic_registered()
 812  * with acpi_register_ioapic()/acpi_unregister_ioapic().
 813  */
 814 int acpi_ioapic_registered(acpi_handle handle, u32 gsi_base)
 815 {
 816         int ret = 0;
 817
 818 #ifdef CONFIG_ACPI_HOTPLUG_IOAPIC
 819         mutex_lock(&acpi_ioapic_lock);
 820         ret  = mp_ioapic_registered(gsi_base);
 821         mutex_unlock(&acpi_ioapic_lock);
 822 #endif
 823
 824         return ret;
 825 }
 826
 827 static int __init acpi_parse_sbf(struct acpi_table_header *table)
 828 {
 829         struct acpi_table_boot *sb = (struct acpi_table_boot *)table;
 830
 831         sbf_port = sb->cmos_index;      /* Save CMOS port */
 832
 833         return 0;
 834 }
 835
 836 #ifdef CONFIG_HPET_TIMER
 837 #include <asm/hpet.h>
 838
 839 static struct resource *hpet_res __initdata;
 840
 841 static int __init acpi_parse_hpet(struct acpi_table_header *table)
 842 {
 843         struct acpi_table_hpet *hpet_tbl = (struct acpi_table_hpet *)table;
 844
 845         if (hpet_tbl->address.space_id != ACPI_SPACE_MEM) {
 846                 printk(KERN_WARNING PREFIX "HPET timers must be located in "
 847                        "memory.\n");
 848                 return -1;
 849         }
 850
 851         hpet_address = hpet_tbl->address.address;
 852         hpet_blockid = hpet_tbl->sequence;
 853
 854         /*
 855          * Some broken BIOSes advertise HPET at 0x0. We really do not
 856          * want to allocate a resource there.
 857          */
 858         if (!hpet_address) {
 859                 printk(KERN_WARNING PREFIX
 860                        "HPET id: %#x base: %#lx is invalid\n",
 861                        hpet_tbl->id, hpet_address);
 862                 return 0;
 863         }
 864 #ifdef CONFIG_X86_64
 865         /*
 866          * Some even more broken BIOSes advertise HPET at
 867          * 0xfed0000000000000 instead of 0xfed00000. Fix it up and add
 868          * some noise:
 869          */
 870         if (hpet_address == 0xfed0000000000000UL) {
 871                 if (!hpet_force_user) {
 872                         printk(KERN_WARNING PREFIX "HPET id: %#x "
 873                                "base: 0xfed0000000000000 is bogus\n "
 874                                "try hpet=force on the kernel command line to "
 875                                "fix it up to 0xfed00000.\n", hpet_tbl->id);
 876                         hpet_address = 0;
 877                         return 0;
 878                 }
 879                 printk(KERN_WARNING PREFIX
 880                        "HPET id: %#x base: 0xfed0000000000000 fixed up "
 881                        "to 0xfed00000.\n", hpet_tbl->id);
 882                 hpet_address >>= 32;
 883         }
 884 #endif
 885         printk(KERN_INFO PREFIX "HPET id: %#x base: %#lx\n",
 886                hpet_tbl->id, hpet_address);
 887
 888         /*
 889          * Allocate and initialize the HPET firmware resource for adding into
 890          * the resource tree during the lateinit timeframe.
 891          */
 892 #define HPET_RESOURCE_NAME_SIZE 9
 893         hpet_res = alloc_bootmem(sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE);
 894
 895         hpet_res->name = (void *)&hpet_res[1];
 896         hpet_res->flags = IORESOURCE_MEM;
 897         snprintf((char *)hpet_res->name, HPET_RESOURCE_NAME_SIZE, "HPET %u",
 898                  hpet_tbl->sequence);
 899
 900         hpet_res->start = hpet_address;
 901         hpet_res->end = hpet_address + (1 * 1024) - 1;
 902
 903         return 0;
 904 }
 905
 906 /*
 907  * hpet_insert_resource inserts the HPET resources used into the resource
 908  * tree.
 909  */
 910 static __init int hpet_insert_resource(void)
 911 {
 912         if (!hpet_res)
 913                 return 1;
 914
 915         return insert_resource(&iomem_resource, hpet_res);
 916 }
 917
 918 late_initcall(hpet_insert_resource);
 919
 920 #else
 921 #define acpi_parse_hpet NULL
 922 #endif
 923
 924 static int __init acpi_parse_fadt(struct acpi_table_header *table)
 925 {
 926         if (!(acpi_gbl_FADT.boot_flags & ACPI_FADT_LEGACY_DEVICES)) {
 927                 pr_debug("ACPI: no legacy devices present\n");
 928                 x86_platform.legacy.devices.pnpbios = 0;
 929         }
 930
 931         if (acpi_gbl_FADT.boot_flags & ACPI_FADT_NO_CMOS_RTC) {
 932                 pr_debug("ACPI: not registering RTC platform device\n");
 933                 x86_platform.legacy.rtc = 0;
 934         }
 935
 936 #ifdef CONFIG_X86_PM_TIMER
 937         /* detect the location of the ACPI PM Timer */
 938         if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID) {
 939                 /* FADT rev. 2 */
 940                 if (acpi_gbl_FADT.xpm_timer_block.space_id !=
 941                     ACPI_ADR_SPACE_SYSTEM_IO)
 942                         return 0;
 943
 944                 pmtmr_ioport = acpi_gbl_FADT.xpm_timer_block.address;
 945                 /*
 946                  * "X" fields are optional extensions to the original V1.0
 947                  * fields, so we must selectively expand V1.0 fields if the
 948                  * corresponding X field is zero.
 949                  */
 950                 if (!pmtmr_ioport)
 951                         pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
 952         } else {
 953                 /* FADT rev. 1 */
 954                 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
 955         }
 956         if (pmtmr_ioport)
 957                 printk(KERN_INFO PREFIX "PM-Timer IO Port: %#x\n",
 958                        pmtmr_ioport);
 959 #endif
 960         return 0;
 961 }
 962
 963 #ifdef  CONFIG_X86_LOCAL_APIC
 964 /*
 965  * Parse LAPIC entries in MADT
 966  * returns 0 on success, < 0 on error
 967  */
 968
 969 static int __init early_acpi_parse_madt_lapic_addr_ovr(void)
 970 {
 971         int count;
 972
 973         if (!boot_cpu_has(X86_FEATURE_APIC))
 974                 return -ENODEV;
 975
 976         /*
 977          * Note that the LAPIC address is obtained from the MADT (32-bit value)
 978          * and (optionally) overridden by a LAPIC_ADDR_OVR entry (64-bit value).
 979          */
 980
 981         count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
 982                                       acpi_parse_lapic_addr_ovr, 0);
 983         if (count < 0) {
 984                 printk(KERN_ERR PREFIX
 985                        "Error parsing LAPIC address override entry\n");
 986                 return count;
 987         }
 988
 989         register_lapic_address(acpi_lapic_addr);
 990
 991         return count;
 992 }
 993
 994 static int __init acpi_parse_madt_lapic_entries(void)
 995 {
 996         int count;
 997         int x2count = 0;
 998         int ret;
 999         struct acpi_subtable_proc madt_proc[2];
1000
1001         if (!boot_cpu_has(X86_FEATURE_APIC))
1002                 return -ENODEV;
1003
1004         count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC,
1005                                       acpi_parse_sapic, MAX_LOCAL_APIC);
1006
1007         if (!count) {
1008                 memset(madt_proc, 0, sizeof(madt_proc));
1009                 madt_proc[0].id = ACPI_MADT_TYPE_LOCAL_APIC;
1010                 madt_proc[0].handler = acpi_parse_lapic;
1011                 madt_proc[1].id = ACPI_MADT_TYPE_LOCAL_X2APIC;
1012                 madt_proc[1].handler = acpi_parse_x2apic;
1013                 ret = acpi_table_parse_entries_array(ACPI_SIG_MADT,
1014                                 sizeof(struct acpi_table_madt),
1015                                 madt_proc, ARRAY_SIZE(madt_proc), MAX_LOCAL_APIC);
1016                 if (ret < 0) {
1017                         printk(KERN_ERR PREFIX
1018                                         "Error parsing LAPIC/X2APIC entries\n");
1019                         return ret;
1020                 }
1021
1022                 count = madt_proc[0].count;
1023                 x2count = madt_proc[1].count;
1024         }
1025         if (!count && !x2count) {
1026                 printk(KERN_ERR PREFIX "No LAPIC entries present\n");
1027                 /* TBD: Cleanup to allow fallback to MPS */
1028                 return -ENODEV;
1029         } else if (count < 0 || x2count < 0) {
1030                 printk(KERN_ERR PREFIX "Error parsing LAPIC entry\n");
1031                 /* TBD: Cleanup to allow fallback to MPS */
1032                 return count;
1033         }
1034
1035         x2count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC_NMI,
1036                                         acpi_parse_x2apic_nmi, 0);
1037         count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI,
1038                                       acpi_parse_lapic_nmi, 0);
1039         if (count < 0 || x2count < 0) {
1040                 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n");
1041                 /* TBD: Cleanup to allow fallback to MPS */
1042                 return count;
1043         }
1044         return 0;
1045 }
1046 #endif                          /* CONFIG_X86_LOCAL_APIC */
1047
1048 #ifdef  CONFIG_X86_IO_APIC
1049 static void __init mp_config_acpi_legacy_irqs(void)
1050 {
1051         int i;
1052         struct mpc_intsrc mp_irq;
1053
1054 #ifdef CONFIG_EISA
1055         /*
1056          * Fabricate the legacy ISA bus (bus #31).
1057          */
1058         mp_bus_id_to_type[MP_ISA_BUS] = MP_BUS_ISA;
1059 #endif
1060         set_bit(MP_ISA_BUS, mp_bus_not_pci);
1061         pr_debug("Bus #%d is ISA\n", MP_ISA_BUS);
1062
1063         /*
1064          * Use the default configuration for the IRQs 0-15.  Unless
1065          * overridden by (MADT) interrupt source override entries.
1066          */
1067         for (i = 0; i < nr_legacy_irqs(); i++) {
1068                 int ioapic, pin;
1069                 unsigned int dstapic;
1070                 int idx;
1071                 u32 gsi;
1072
1073                 /* Locate the gsi that irq i maps to. */
1074                 if (acpi_isa_irq_to_gsi(i, &gsi))
1075                         continue;
1076
1077                 /*
1078                  * Locate the IOAPIC that manages the ISA IRQ.
1079                  */
1080                 ioapic = mp_find_ioapic(gsi);
1081                 if (ioapic < 0)
1082                         continue;
1083                 pin = mp_find_ioapic_pin(ioapic, gsi);
1084                 dstapic = mpc_ioapic_id(ioapic);
1085
1086                 for (idx = 0; idx < mp_irq_entries; idx++) {
1087                         struct mpc_intsrc *irq = mp_irqs + idx;
1088
1089                         /* Do we already have a mapping for this ISA IRQ? */
1090                         if (irq->srcbus == MP_ISA_BUS && irq->srcbusirq == i)
1091                                 break;
1092
1093                         /* Do we already have a mapping for this IOAPIC pin */
1094                         if (irq->dstapic == dstapic && irq->dstirq == pin)
1095                                 break;
1096                 }
1097
1098                 if (idx != mp_irq_entries) {
1099                         printk(KERN_DEBUG "ACPI: IRQ%d used by override.\n", i);
1100                         continue;       /* IRQ already used */
1101                 }
1102
1103                 mp_irq.type = MP_INTSRC;
1104                 mp_irq.irqflag = 0;     /* Conforming */
1105                 mp_irq.srcbus = MP_ISA_BUS;
1106                 mp_irq.dstapic = dstapic;
1107                 mp_irq.irqtype = mp_INT;
1108                 mp_irq.srcbusirq = i; /* Identity mapped */
1109                 mp_irq.dstirq = pin;
1110
1111                 mp_save_irq(&mp_irq);
1112         }
1113 }
1114
1115 /*
1116  * Parse IOAPIC related entries in MADT
1117  * returns 0 on success, < 0 on error
1118  */
1119 static int __init acpi_parse_madt_ioapic_entries(void)
1120 {
1121         int count;
1122
1123         /*
1124          * ACPI interpreter is required to complete interrupt setup,
1125          * so if it is off, don't enumerate the io-apics with ACPI.
1126          * If MPS is present, it will handle them,
1127          * otherwise the system will stay in PIC mode
1128          */
1129         if (acpi_disabled || acpi_noirq)
1130                 return -ENODEV;
1131
1132         if (!boot_cpu_has(X86_FEATURE_APIC))
1133                 return -ENODEV;
1134
1135         /*
1136          * if "noapic" boot option, don't look for IO-APICs
1137          */
1138         if (skip_ioapic_setup) {
1139                 printk(KERN_INFO PREFIX "Skipping IOAPIC probe "
1140                        "due to 'noapic' option.\n");
1141                 return -ENODEV;
1142         }
1143
1144         count = acpi_table_parse_madt(ACPI_MADT_TYPE_IO_APIC, acpi_parse_ioapic,
1145                                       MAX_IO_APICS);
1146         if (!count) {
1147                 printk(KERN_ERR PREFIX "No IOAPIC entries present\n");
1148                 return -ENODEV;
1149         } else if (count < 0) {
1150                 printk(KERN_ERR PREFIX "Error parsing IOAPIC entry\n");
1151                 return count;
1152         }
1153
1154         count = acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE,
1155                                       acpi_parse_int_src_ovr, nr_irqs);
1156         if (count < 0) {
1157                 printk(KERN_ERR PREFIX
1158                        "Error parsing interrupt source overrides entry\n");
1159                 /* TBD: Cleanup to allow fallback to MPS */
1160                 return count;
1161         }
1162
1163         /*
1164          * If BIOS did not supply an INT_SRC_OVR for the SCI
1165          * pretend we got one so we can set the SCI flags.
1166          */
1167         if (!acpi_sci_override_gsi)
1168                 acpi_sci_ioapic_setup(acpi_gbl_FADT.sci_interrupt, 0, 0,
1169                                       acpi_gbl_FADT.sci_interrupt);
1170
1171         /* Fill in identity legacy mappings where no override */
1172         mp_config_acpi_legacy_irqs();
1173
1174         count = acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE,
1175                                       acpi_parse_nmi_src, nr_irqs);
1176         if (count < 0) {
1177                 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n");
1178                 /* TBD: Cleanup to allow fallback to MPS */
1179                 return count;
1180         }
1181
1182         return 0;
1183 }
1184 #else
1185 static inline int acpi_parse_madt_ioapic_entries(void)
1186 {
1187         return -1;
1188 }
1189 #endif  /* !CONFIG_X86_IO_APIC */
1190
1191 static void __init early_acpi_process_madt(void)
1192 {
1193 #ifdef CONFIG_X86_LOCAL_APIC
1194         int error;
1195
1196         if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1197
1198                 /*
1199                  * Parse MADT LAPIC entries
1200                  */
1201                 error = early_acpi_parse_madt_lapic_addr_ovr();
1202                 if (!error) {
1203                         acpi_lapic = 1;
1204                         smp_found_config = 1;
1205                 }
1206                 if (error == -EINVAL) {
1207                         /*
1208                          * Dell Precision Workstation 410, 610 come here.
1209                          */
1210                         printk(KERN_ERR PREFIX
1211                                "Invalid BIOS MADT, disabling ACPI\n");
1212                         disable_acpi();
1213                 }
1214         }
1215 #endif
1216 }
1217
1218 static void __init acpi_process_madt(void)
1219 {
1220 #ifdef CONFIG_X86_LOCAL_APIC
1221         int error;
1222
1223         if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1224
1225                 /*
1226                  * Parse MADT LAPIC entries
1227                  */
1228                 error = acpi_parse_madt_lapic_entries();
1229                 if (!error) {
1230                         acpi_lapic = 1;
1231
1232                         /*
1233                          * Parse MADT IO-APIC entries
1234                          */
1235                         mutex_lock(&acpi_ioapic_lock);
1236                         error = acpi_parse_madt_ioapic_entries();
1237                         mutex_unlock(&acpi_ioapic_lock);
1238                         if (!error) {
1239                                 acpi_set_irq_model_ioapic();
1240
1241                                 smp_found_config = 1;
1242                         }
1243                 }
1244                 if (error == -EINVAL) {
1245                         /*
1246                          * Dell Precision Workstation 410, 610 come here.
1247                          */
1248                         printk(KERN_ERR PREFIX
1249                                "Invalid BIOS MADT, disabling ACPI\n");
1250                         disable_acpi();
1251                 }
1252         } else {
1253                 /*
1254                  * ACPI found no MADT, and so ACPI wants UP PIC mode.
1255                  * In the event an MPS table was found, forget it.
1256                  * Boot with "acpi=off" to use MPS on such a system.
1257                  */
1258                 if (smp_found_config) {
1259                         printk(KERN_WARNING PREFIX
1260                                 "No APIC-table, disabling MPS\n");
1261                         smp_found_config = 0;
1262                 }
1263         }
1264
1265         /*
1266          * ACPI supports both logical (e.g. Hyper-Threading) and physical
1267          * processors, where MPS only supports physical.
1268          */
1269         if (acpi_lapic && acpi_ioapic)
1270                 printk(KERN_INFO "Using ACPI (MADT) for SMP configuration "
1271                        "information\n");
1272         else if (acpi_lapic)
1273                 printk(KERN_INFO "Using ACPI for processor (LAPIC) "
1274                        "configuration information\n");
1275 #endif
1276         return;
1277 }
1278
1279 static int __init disable_acpi_irq(const struct dmi_system_id *d)
1280 {
1281         if (!acpi_force) {
1282                 printk(KERN_NOTICE "%s detected: force use of acpi=noirq\n",
1283                        d->ident);
1284                 acpi_noirq_set();
1285         }
1286         return 0;
1287 }
1288
1289 static int __init disable_acpi_pci(const struct dmi_system_id *d)
1290 {
1291         if (!acpi_force) {
1292                 printk(KERN_NOTICE "%s detected: force use of pci=noacpi\n",
1293                        d->ident);
1294                 acpi_disable_pci();
1295         }
1296         return 0;
1297 }
1298
1299 static int __init dmi_disable_acpi(const struct dmi_system_id *d)
1300 {
1301         if (!acpi_force) {
1302                 printk(KERN_NOTICE "%s detected: acpi off\n", d->ident);
1303                 disable_acpi();
1304         } else {
1305                 printk(KERN_NOTICE
1306                        "Warning: DMI blacklist says broken, but acpi forced\n");
1307         }
1308         return 0;
1309 }
1310
1311 /*
1312  * Force ignoring BIOS IRQ0 override
1313  */
1314 static int __init dmi_ignore_irq0_timer_override(const struct dmi_system_id *d)
1315 {
1316         if (!acpi_skip_timer_override) {
1317                 pr_notice("%s detected: Ignoring BIOS IRQ0 override\n",
1318                         d->ident);
1319                 acpi_skip_timer_override = 1;
1320         }
1321         return 0;
1322 }
1323
1324 /*
1325  * ACPI offers an alternative platform interface model that removes
1326  * ACPI hardware requirements for platforms that do not implement
1327  * the PC Architecture.
1328  *
1329  * We initialize the Hardware-reduced ACPI model here:
1330  */
1331 static void __init acpi_reduced_hw_init(void)
1332 {
1333         if (acpi_gbl_reduced_hardware) {
1334                 /*
1335                  * Override x86_init functions and bypass legacy pic
1336                  * in Hardware-reduced ACPI mode
1337                  */
1338                 x86_init.timers.timer_init      = x86_init_noop;
1339                 x86_init.irqs.pre_vector_init   = x86_init_noop;
1340                 legacy_pic                      = &null_legacy_pic;
1341         }
1342 }
1343
1344 /*
1345  * If your system is blacklisted here, but you find that acpi=force
1346  * works for you, please contact linux-acpi@vger.kernel.org
1347  */
1348 static struct dmi_system_id __initdata acpi_dmi_table[] = {
1349         /*
1350          * Boxes that need ACPI disabled
1351          */
1352         {
1353          .callback = dmi_disable_acpi,
1354          .ident = "IBM Thinkpad",
1355          .matches = {
1356                      DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1357                      DMI_MATCH(DMI_BOARD_NAME, "2629H1G"),
1358                      },
1359          },
1360
1361         /*
1362          * Boxes that need ACPI PCI IRQ routing disabled
1363          */
1364         {
1365          .callback = disable_acpi_irq,
1366          .ident = "ASUS A7V",
1367          .matches = {
1368                      DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC"),
1369                      DMI_MATCH(DMI_BOARD_NAME, "<A7V>"),
1370                      /* newer BIOS, Revision 1011, does work */
1371                      DMI_MATCH(DMI_BIOS_VERSION,
1372                                "ASUS A7V ACPI BIOS Revision 1007"),
1373                      },
1374          },
1375         {
1376                 /*
1377                  * Latest BIOS for IBM 600E (1.16) has bad pcinum
1378                  * for LPC bridge, which is needed for the PCI
1379                  * interrupt links to work. DSDT fix is in bug 5966.
1380                  * 2645, 2646 model numbers are shared with 600/600E/600X
1381                  */
1382          .callback = disable_acpi_irq,
1383          .ident = "IBM Thinkpad 600 Series 2645",
1384          .matches = {
1385                      DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1386                      DMI_MATCH(DMI_BOARD_NAME, "2645"),
1387                      },
1388          },
1389         {
1390          .callback = disable_acpi_irq,
1391          .ident = "IBM Thinkpad 600 Series 2646",
1392          .matches = {
1393                      DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1394                      DMI_MATCH(DMI_BOARD_NAME, "2646"),
1395                      },
1396          },
1397         /*
1398          * Boxes that need ACPI PCI IRQ routing and PCI scan disabled
1399          */
1400         {                       /* _BBN 0 bug */
1401          .callback = disable_acpi_pci,
1402          .ident = "ASUS PR-DLS",
1403          .matches = {
1404                      DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1405                      DMI_MATCH(DMI_BOARD_NAME, "PR-DLS"),
1406                      DMI_MATCH(DMI_BIOS_VERSION,
1407                                "ASUS PR-DLS ACPI BIOS Revision 1010"),
1408                      DMI_MATCH(DMI_BIOS_DATE, "03/21/2003")
1409                      },
1410          },
1411         {
1412          .callback = disable_acpi_pci,
1413          .ident = "Acer TravelMate 36x Laptop",
1414          .matches = {
1415                      DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
1416                      DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"),
1417                      },
1418          },
1419         {}
1420 };
1421
1422 /* second table for DMI checks that should run after early-quirks */
1423 static struct dmi_system_id __initdata acpi_dmi_table_late[] = {
1424         /*
1425          * HP laptops which use a DSDT reporting as HP/SB400/10000,
1426          * which includes some code which overrides all temperature
1427          * trip points to 16C if the INTIN2 input of the I/O APIC
1428          * is enabled.  This input is incorrectly designated the
1429          * ISA IRQ 0 via an interrupt source override even though
1430          * it is wired to the output of the master 8259A and INTIN0
1431          * is not connected at all.  Force ignoring BIOS IRQ0
1432          * override in that cases.
1433          */
1434         {
1435          .callback = dmi_ignore_irq0_timer_override,
1436          .ident = "HP nx6115 laptop",
1437          .matches = {
1438                      DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1439                      DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6115"),
1440                      },
1441          },
1442         {
1443          .callback = dmi_ignore_irq0_timer_override,
1444          .ident = "HP NX6125 laptop",
1445          .matches = {
1446                      DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1447                      DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6125"),
1448                      },
1449          },
1450         {
1451          .callback = dmi_ignore_irq0_timer_override,
1452          .ident = "HP NX6325 laptop",
1453          .matches = {
1454                      DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1455                      DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6325"),
1456                      },
1457          },
1458         {
1459          .callback = dmi_ignore_irq0_timer_override,
1460          .ident = "HP 6715b laptop",
1461          .matches = {
1462                      DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1463                      DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq 6715b"),
1464                      },
1465          },
1466         {
1467          .callback = dmi_ignore_irq0_timer_override,
1468          .ident = "FUJITSU SIEMENS",
1469          .matches = {
1470                      DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
1471                      DMI_MATCH(DMI_PRODUCT_NAME, "AMILO PRO V2030"),
1472                      },
1473          },
1474         {}
1475 };
1476
1477 /*
1478  * acpi_boot_table_init() and acpi_boot_init()
1479  *  called from setup_arch(), always.
1480  *      1. checksums all tables
1481  *      2. enumerates lapics
1482  *      3. enumerates io-apics
1483  *
1484  * acpi_table_init() is separate to allow reading SRAT without
1485  * other side effects.
1486  *
1487  * side effects of acpi_boot_init:
1488  *      acpi_lapic = 1 if LAPIC found
1489  *      acpi_ioapic = 1 if IOAPIC found
1490  *      if (acpi_lapic && acpi_ioapic) smp_found_config = 1;
1491  *      if acpi_blacklisted() acpi_disabled = 1;
1492  *      acpi_irq_model=...
1493  *      ...
1494  */
1495
1496 void __init acpi_boot_table_init(void)
1497 {
1498         dmi_check_system(acpi_dmi_table);
1499
1500         /*
1501          * If acpi_disabled, bail out
1502          */
1503         if (acpi_disabled)
1504                 return;
1505
1506         /*
1507          * Initialize the ACPI boot-time table parser.
1508          */
1509         if (acpi_table_init()) {
1510                 disable_acpi();
1511                 return;
1512         }
1513
1514         acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1515
1516         /*
1517          * blacklist may disable ACPI entirely
1518          */
1519         if (acpi_blacklisted()) {
1520                 if (acpi_force) {
1521                         printk(KERN_WARNING PREFIX "acpi=force override\n");
1522                 } else {
1523                         printk(KERN_WARNING PREFIX "Disabling ACPI support\n");
1524                         disable_acpi();
1525                         return;
1526                 }
1527         }
1528 }
1529
1530 int __init early_acpi_boot_init(void)
1531 {
1532         /*
1533          * If acpi_disabled, bail out
1534          */
1535         if (acpi_disabled)
1536                 return 1;
1537
1538         /*
1539          * Process the Multiple APIC Description Table (MADT), if present
1540          */
1541         early_acpi_process_madt();
1542
1543         /*
1544          * Hardware-reduced ACPI mode initialization:
1545          */
1546         acpi_reduced_hw_init();
1547
1548         return 0;
1549 }
1550
1551 int __init acpi_boot_init(void)
1552 {
1553         /* those are executed after early-quirks are executed */
1554         dmi_check_system(acpi_dmi_table_late);
1555
1556         /*
1557          * If acpi_disabled, bail out
1558          */
1559         if (acpi_disabled)
1560                 return 1;
1561
1562         acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1563
1564         /*
1565          * set sci_int and PM timer address
1566          */
1567         acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt);
1568
1569         /*
1570          * Process the Multiple APIC Description Table (MADT), if present
1571          */
1572         acpi_process_madt();
1573
1574         acpi_table_parse(ACPI_SIG_HPET, acpi_parse_hpet);
1575
1576         if (!acpi_noirq)
1577                 x86_init.pci.init = pci_acpi_init;
1578
1579         return 0;
1580 }
1581
1582 static int __init parse_acpi(char *arg)
1583 {
1584         if (!arg)
1585                 return -EINVAL;
1586
1587         /* "acpi=off" disables both ACPI table parsing and interpreter */
1588         if (strcmp(arg, "off") == 0) {
1589                 disable_acpi();
1590         }
1591         /* acpi=force to over-ride black-list */
1592         else if (strcmp(arg, "force") == 0) {
1593                 acpi_force = 1;
1594                 acpi_disabled = 0;
1595         }
1596         /* acpi=strict disables out-of-spec workarounds */
1597         else if (strcmp(arg, "strict") == 0) {
1598                 acpi_strict = 1;
1599         }
1600         /* acpi=rsdt use RSDT instead of XSDT */
1601         else if (strcmp(arg, "rsdt") == 0) {
1602                 acpi_gbl_do_not_use_xsdt = TRUE;
1603         }
1604         /* "acpi=noirq" disables ACPI interrupt routing */
1605         else if (strcmp(arg, "noirq") == 0) {
1606                 acpi_noirq_set();
1607         }
1608         /* "acpi=copy_dsdt" copys DSDT */
1609         else if (strcmp(arg, "copy_dsdt") == 0) {
1610                 acpi_gbl_copy_dsdt_locally = 1;
1611         }
1612         /* "acpi=nocmcff" disables FF mode for corrected errors */
1613         else if (strcmp(arg, "nocmcff") == 0) {
1614                 acpi_disable_cmcff = 1;
1615         } else {
1616                 /* Core will printk when we return error. */
1617                 return -EINVAL;
1618         }
1619         return 0;
1620 }
1621 early_param("acpi", parse_acpi);
1622
1623 /* FIXME: Using pci= for an ACPI parameter is a travesty. */
1624 static int __init parse_pci(char *arg)
1625 {
1626         if (arg && strcmp(arg, "noacpi") == 0)
1627                 acpi_disable_pci();
1628         return 0;
1629 }
1630 early_param("pci", parse_pci);
1631
1632 int __init acpi_mps_check(void)
1633 {
1634 #if defined(CONFIG_X86_LOCAL_APIC) && !defined(CONFIG_X86_MPPARSE)
1635 /* mptable code is not built-in*/
1636         if (acpi_disabled || acpi_noirq) {
1637                 printk(KERN_WARNING "MPS support code is not built-in.\n"
1638                        "Using acpi=off or acpi=noirq or pci=noacpi "
1639                        "may have problem\n");
1640                 return 1;
1641         }
1642 #endif
1643         return 0;
1644 }
1645
1646 #ifdef CONFIG_X86_IO_APIC
1647 static int __init parse_acpi_skip_timer_override(char *arg)
1648 {
1649         acpi_skip_timer_override = 1;
1650         return 0;
1651 }
1652 early_param("acpi_skip_timer_override", parse_acpi_skip_timer_override);
1653
1654 static int __init parse_acpi_use_timer_override(char *arg)
1655 {
1656         acpi_use_timer_override = 1;
1657         return 0;
1658 }
1659 early_param("acpi_use_timer_override", parse_acpi_use_timer_override);
1660 #endif /* CONFIG_X86_IO_APIC */
1661
1662 static int __init setup_acpi_sci(char *s)
1663 {
1664         if (!s)
1665                 return -EINVAL;
1666         if (!strcmp(s, "edge"))
1667                 acpi_sci_flags =  ACPI_MADT_TRIGGER_EDGE |
1668                         (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1669         else if (!strcmp(s, "level"))
1670                 acpi_sci_flags = ACPI_MADT_TRIGGER_LEVEL |
1671                         (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1672         else if (!strcmp(s, "high"))
1673                 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_HIGH |
1674                         (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1675         else if (!strcmp(s, "low"))
1676                 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_LOW |
1677                         (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1678         else
1679                 return -EINVAL;
1680         return 0;
1681 }
1682 early_param("acpi_sci", setup_acpi_sci);
1683
1684 int __acpi_acquire_global_lock(unsigned int *lock)
1685 {
1686         unsigned int old, new, val;
1687         do {
1688                 old = *lock;
1689                 new = (((old & ~0x3) + 2) + ((old >> 1) & 0x1));
1690                 val = cmpxchg(lock, old, new);
1691         } while (unlikely (val != old));
1692         return (new < 3) ? -1 : 0;
1693 }
1694
1695 int __acpi_release_global_lock(unsigned int *lock)
1696 {
1697         unsigned int old, new, val;
1698         do {
1699                 old = *lock;
1700                 new = old & ~0x3;
1701                 val = cmpxchg(lock, old, new);
1702         } while (unlikely (val != old));
1703         return old & 0x1;
1704 }
1705
1706 void __init arch_reserve_mem_area(acpi_physical_address addr, size_t size)
1707 {
1708         e820_add_region(addr, size, E820_ACPI);
1709         update_e820();
1710 }