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 #ifdef CONFIG_X86_IO_APIC
  80 /*
  81  * Locks related to IOAPIC hotplug
  82  * Hotplug side:
  83  *      ->device_hotplug_lock
  84  *              ->acpi_ioapic_lock
  85  *                      ->ioapic_lock
  86  * Interrupt mapping side:
  87  *      ->acpi_ioapic_lock
  88  *              ->ioapic_mutex
  89  *                      ->ioapic_lock
  90  */
  91 static DEFINE_MUTEX(acpi_ioapic_lock);
  92 #endif
  93
  94 /* --------------------------------------------------------------------------
  95                               Boot-time Configuration
  96    -------------------------------------------------------------------------- */
  97
  98 /*
  99  * The default interrupt routing model is PIC (8259).  This gets
 100  * overridden if IOAPICs are enumerated (below).
 101  */
 102 enum acpi_irq_model_id acpi_irq_model = ACPI_IRQ_MODEL_PIC;
 103
 104
 105 /*
 106  * ISA irqs by default are the first 16 gsis but can be
 107  * any gsi as specified by an interrupt source override.
 108  */
 109 static u32 isa_irq_to_gsi[NR_IRQS_LEGACY] __read_mostly = {
 110         0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15
 111 };
 112
 113 #define ACPI_INVALID_GSI                INT_MIN
 114
 115 /*
 116  * This is just a simple wrapper around early_ioremap(),
 117  * with sanity checks for phys == 0 and size == 0.
 118  */
 119 char *__init __acpi_map_table(unsigned long phys, unsigned long size)
 120 {
 121
 122         if (!phys || !size)
 123                 return NULL;
 124
 125         return early_ioremap(phys, size);
 126 }
 127
 128 void __init __acpi_unmap_table(char *map, unsigned long size)
 129 {
 130         if (!map || !size)
 131                 return;
 132
 133         early_iounmap(map, size);
 134 }
 135
 136 #ifdef CONFIG_X86_LOCAL_APIC
 137 static int __init acpi_parse_madt(struct acpi_table_header *table)
 138 {
 139         struct acpi_table_madt *madt = NULL;
 140
 141         if (!boot_cpu_has(X86_FEATURE_APIC))
 142                 return -EINVAL;
 143
 144         madt = (struct acpi_table_madt *)table;
 145         if (!madt) {
 146                 printk(KERN_WARNING PREFIX "Unable to map MADT\n");
 147                 return -ENODEV;
 148         }
 149
 150         if (madt->address) {
 151                 acpi_lapic_addr = (u64) madt->address;
 152
 153                 printk(KERN_DEBUG PREFIX "Local APIC address 0x%08x\n",
 154                        madt->address);
 155         }
 156
 157         default_acpi_madt_oem_check(madt->header.oem_id,
 158                                     madt->header.oem_table_id);
 159
 160         return 0;
 161 }
 162
 163 /**
 164  * acpi_register_lapic - register a local apic and generates a logic cpu number
 165  * @id: local apic id to register
 166  * @acpiid: ACPI id to register
 167  * @enabled: this cpu is enabled or not
 168  *
 169  * Returns the logic cpu number which maps to the local apic
 170  */
 171 static int acpi_register_lapic(int id, u32 acpiid, u8 enabled)
 172 {
 173         unsigned int ver = 0;
 174         int cpu;
 175
 176         if (id >= MAX_LOCAL_APIC) {
 177                 printk(KERN_INFO PREFIX "skipped apicid that is too big\n");
 178                 return -EINVAL;
 179         }
 180
 181         if (boot_cpu_physical_apicid != -1U)
 182                 ver = boot_cpu_apic_version;
 183
 184         cpu = __generic_processor_info(id, ver, enabled);
 185         if (cpu >= 0)
 186                 early_per_cpu(x86_cpu_to_acpiid, cpu) = acpiid;
 187
 188         return cpu;
 189 }
 190
 191 static int __init
 192 acpi_parse_x2apic(struct acpi_subtable_header *header, const unsigned long end)
 193 {
 194         struct acpi_madt_local_x2apic *processor = NULL;
 195         int apic_id;
 196         u8 enabled;
 197
 198         processor = (struct acpi_madt_local_x2apic *)header;
 199
 200         if (BAD_MADT_ENTRY(processor, end))
 201                 return -EINVAL;
 202
 203         acpi_table_print_madt_entry(header);
 204
 205         apic_id = processor->local_apic_id;
 206         enabled = processor->lapic_flags & ACPI_MADT_ENABLED;
 207 #ifdef CONFIG_X86_X2APIC
 208         /*
 209          * We need to register disabled CPU as well to permit
 210          * counting disabled CPUs. This allows us to size
 211          * cpus_possible_map more accurately, to permit
 212          * to not preallocating memory for all NR_CPUS
 213          * when we use CPU hotplug.
 214          */
 215         if (!apic->apic_id_valid(apic_id) && enabled)
 216                 printk(KERN_WARNING PREFIX "x2apic entry ignored\n");
 217         else
 218                 acpi_register_lapic(apic_id, processor->uid, enabled);
 219 #else
 220         printk(KERN_WARNING PREFIX "x2apic entry ignored\n");
 221 #endif
 222
 223         return 0;
 224 }
 225
 226 static int __init
 227 acpi_parse_lapic(struct acpi_subtable_header * header, const unsigned long end)
 228 {
 229         struct acpi_madt_local_apic *processor = NULL;
 230
 231         processor = (struct acpi_madt_local_apic *)header;
 232
 233         if (BAD_MADT_ENTRY(processor, end))
 234                 return -EINVAL;
 235
 236         acpi_table_print_madt_entry(header);
 237
 238         /* Ignore invalid ID */
 239         if (processor->id == 0xff)
 240                 return 0;
 241
 242         /*
 243          * We need to register disabled CPU as well to permit
 244          * counting disabled CPUs. This allows us to size
 245          * cpus_possible_map more accurately, to permit
 246          * to not preallocating memory for all NR_CPUS
 247          * when we use CPU hotplug.
 248          */
 249         acpi_register_lapic(processor->id,      /* APIC ID */
 250                             processor->processor_id, /* ACPI ID */
 251                             processor->lapic_flags & ACPI_MADT_ENABLED);
 252
 253         return 0;
 254 }
 255
 256 static int __init
 257 acpi_parse_sapic(struct acpi_subtable_header *header, const unsigned long end)
 258 {
 259         struct acpi_madt_local_sapic *processor = NULL;
 260
 261         processor = (struct acpi_madt_local_sapic *)header;
 262
 263         if (BAD_MADT_ENTRY(processor, end))
 264                 return -EINVAL;
 265
 266         acpi_table_print_madt_entry(header);
 267
 268         acpi_register_lapic((processor->id << 8) | processor->eid,/* APIC ID */
 269                             processor->processor_id, /* ACPI ID */
 270                             processor->lapic_flags & ACPI_MADT_ENABLED);
 271
 272         return 0;
 273 }
 274
 275 static int __init
 276 acpi_parse_lapic_addr_ovr(struct acpi_subtable_header * header,
 277                           const unsigned long end)
 278 {
 279         struct acpi_madt_local_apic_override *lapic_addr_ovr = NULL;
 280
 281         lapic_addr_ovr = (struct acpi_madt_local_apic_override *)header;
 282
 283         if (BAD_MADT_ENTRY(lapic_addr_ovr, end))
 284                 return -EINVAL;
 285
 286         acpi_table_print_madt_entry(header);
 287
 288         acpi_lapic_addr = lapic_addr_ovr->address;
 289
 290         return 0;
 291 }
 292
 293 static int __init
 294 acpi_parse_x2apic_nmi(struct acpi_subtable_header *header,
 295                       const unsigned long end)
 296 {
 297         struct acpi_madt_local_x2apic_nmi *x2apic_nmi = NULL;
 298
 299         x2apic_nmi = (struct acpi_madt_local_x2apic_nmi *)header;
 300
 301         if (BAD_MADT_ENTRY(x2apic_nmi, end))
 302                 return -EINVAL;
 303
 304         acpi_table_print_madt_entry(header);
 305
 306         if (x2apic_nmi->lint != 1)
 307                 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n");
 308
 309         return 0;
 310 }
 311
 312 static int __init
 313 acpi_parse_lapic_nmi(struct acpi_subtable_header * header, const unsigned long end)
 314 {
 315         struct acpi_madt_local_apic_nmi *lapic_nmi = NULL;
 316
 317         lapic_nmi = (struct acpi_madt_local_apic_nmi *)header;
 318
 319         if (BAD_MADT_ENTRY(lapic_nmi, end))
 320                 return -EINVAL;
 321
 322         acpi_table_print_madt_entry(header);
 323
 324         if (lapic_nmi->lint != 1)
 325                 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n");
 326
 327         return 0;
 328 }
 329
 330 #endif                          /*CONFIG_X86_LOCAL_APIC */
 331
 332 #ifdef CONFIG_X86_IO_APIC
 333 #define MP_ISA_BUS              0
 334
 335 static void __init mp_override_legacy_irq(u8 bus_irq, u8 polarity, u8 trigger,
 336                                           u32 gsi)
 337 {
 338         int ioapic;
 339         int pin;
 340         struct mpc_intsrc mp_irq;
 341
 342         /*
 343          * Convert 'gsi' to 'ioapic.pin'.
 344          */
 345         ioapic = mp_find_ioapic(gsi);
 346         if (ioapic < 0)
 347                 return;
 348         pin = mp_find_ioapic_pin(ioapic, gsi);
 349
 350         /*
 351          * TBD: This check is for faulty timer entries, where the override
 352          *      erroneously sets the trigger to level, resulting in a HUGE
 353          *      increase of timer interrupts!
 354          */
 355         if ((bus_irq == 0) && (trigger == 3))
 356                 trigger = 1;
 357
 358         mp_irq.type = MP_INTSRC;
 359         mp_irq.irqtype = mp_INT;
 360         mp_irq.irqflag = (trigger << 2) | polarity;
 361         mp_irq.srcbus = MP_ISA_BUS;
 362         mp_irq.srcbusirq = bus_irq;     /* IRQ */
 363         mp_irq.dstapic = mpc_ioapic_id(ioapic); /* APIC ID */
 364         mp_irq.dstirq = pin;    /* INTIN# */
 365
 366         mp_save_irq(&mp_irq);
 367
 368         /*
 369          * Reset default identity mapping if gsi is also an legacy IRQ,
 370          * otherwise there will be more than one entry with the same GSI
 371          * and acpi_isa_irq_to_gsi() may give wrong result.
 372          */
 373         if (gsi < nr_legacy_irqs() && isa_irq_to_gsi[gsi] == gsi)
 374                 isa_irq_to_gsi[gsi] = ACPI_INVALID_GSI;
 375         isa_irq_to_gsi[bus_irq] = gsi;
 376 }
 377
 378 static int mp_config_acpi_gsi(struct device *dev, u32 gsi, int trigger,
 379                         int polarity)
 380 {
 381 #ifdef CONFIG_X86_MPPARSE
 382         struct mpc_intsrc mp_irq;
 383         struct pci_dev *pdev;
 384         unsigned char number;
 385         unsigned int devfn;
 386         int ioapic;
 387         u8 pin;
 388
 389         if (!acpi_ioapic)
 390                 return 0;
 391         if (!dev || !dev_is_pci(dev))
 392                 return 0;
 393
 394         pdev = to_pci_dev(dev);
 395         number = pdev->bus->number;
 396         devfn = pdev->devfn;
 397         pin = pdev->pin;
 398         /* print the entry should happen on mptable identically */
 399         mp_irq.type = MP_INTSRC;
 400         mp_irq.irqtype = mp_INT;
 401         mp_irq.irqflag = (trigger == ACPI_EDGE_SENSITIVE ? 4 : 0x0c) |
 402                                 (polarity == ACPI_ACTIVE_HIGH ? 1 : 3);
 403         mp_irq.srcbus = number;
 404         mp_irq.srcbusirq = (((devfn >> 3) & 0x1f) << 2) | ((pin - 1) & 3);
 405         ioapic = mp_find_ioapic(gsi);
 406         mp_irq.dstapic = mpc_ioapic_id(ioapic);
 407         mp_irq.dstirq = mp_find_ioapic_pin(ioapic, gsi);
 408
 409         mp_save_irq(&mp_irq);
 410 #endif
 411         return 0;
 412 }
 413
 414 static int __init
 415 acpi_parse_ioapic(struct acpi_subtable_header * header, const unsigned long end)
 416 {
 417         struct acpi_madt_io_apic *ioapic = NULL;
 418         struct ioapic_domain_cfg cfg = {
 419                 .type = IOAPIC_DOMAIN_DYNAMIC,
 420                 .ops = &mp_ioapic_irqdomain_ops,
 421         };
 422
 423         ioapic = (struct acpi_madt_io_apic *)header;
 424
 425         if (BAD_MADT_ENTRY(ioapic, end))
 426                 return -EINVAL;
 427
 428         acpi_table_print_madt_entry(header);
 429
 430         /* Statically assign IRQ numbers for IOAPICs hosting legacy IRQs */
 431         if (ioapic->global_irq_base < nr_legacy_irqs())
 432                 cfg.type = IOAPIC_DOMAIN_LEGACY;
 433
 434         mp_register_ioapic(ioapic->id, ioapic->address, ioapic->global_irq_base,
 435                            &cfg);
 436
 437         return 0;
 438 }
 439
 440 /*
 441  * Parse Interrupt Source Override for the ACPI SCI
 442  */
 443 static void __init acpi_sci_ioapic_setup(u8 bus_irq, u16 polarity, u16 trigger, u32 gsi)
 444 {
 445         if (trigger == 0)       /* compatible SCI trigger is level */
 446                 trigger = 3;
 447
 448         if (polarity == 0)      /* compatible SCI polarity is low */
 449                 polarity = 3;
 450
 451         /* Command-line over-ride via acpi_sci= */
 452         if (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK)
 453                 trigger = (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2;
 454
 455         if (acpi_sci_flags & ACPI_MADT_POLARITY_MASK)
 456                 polarity = acpi_sci_flags & ACPI_MADT_POLARITY_MASK;
 457
 458         mp_override_legacy_irq(bus_irq, polarity, trigger, gsi);
 459         acpi_penalize_sci_irq(bus_irq, trigger, polarity);
 460
 461         /*
 462          * stash over-ride to indicate we've been here
 463          * and for later update of acpi_gbl_FADT
 464          */
 465         acpi_sci_override_gsi = gsi;
 466         return;
 467 }
 468
 469 static int __init
 470 acpi_parse_int_src_ovr(struct acpi_subtable_header * header,
 471                        const unsigned long end)
 472 {
 473         struct acpi_madt_interrupt_override *intsrc = NULL;
 474
 475         intsrc = (struct acpi_madt_interrupt_override *)header;
 476
 477         if (BAD_MADT_ENTRY(intsrc, end))
 478                 return -EINVAL;
 479
 480         acpi_table_print_madt_entry(header);
 481
 482         if (intsrc->source_irq == acpi_gbl_FADT.sci_interrupt) {
 483                 acpi_sci_ioapic_setup(intsrc->source_irq,
 484                                       intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
 485                                       (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2,
 486                                       intsrc->global_irq);
 487                 return 0;
 488         }
 489
 490         if (intsrc->source_irq == 0) {
 491                 if (acpi_skip_timer_override) {
 492                         printk(PREFIX "BIOS IRQ0 override ignored.\n");
 493                         return 0;
 494                 }
 495
 496                 if ((intsrc->global_irq == 2) && acpi_fix_pin2_polarity
 497                         && (intsrc->inti_flags & ACPI_MADT_POLARITY_MASK)) {
 498                         intsrc->inti_flags &= ~ACPI_MADT_POLARITY_MASK;
 499                         printk(PREFIX "BIOS IRQ0 pin2 override: forcing polarity to high active.\n");
 500                 }
 501         }
 502
 503         mp_override_legacy_irq(intsrc->source_irq,
 504                                 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
 505                                 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2,
 506                                 intsrc->global_irq);
 507
 508         return 0;
 509 }
 510
 511 static int __init
 512 acpi_parse_nmi_src(struct acpi_subtable_header * header, const unsigned long end)
 513 {
 514         struct acpi_madt_nmi_source *nmi_src = NULL;
 515
 516         nmi_src = (struct acpi_madt_nmi_source *)header;
 517
 518         if (BAD_MADT_ENTRY(nmi_src, end))
 519                 return -EINVAL;
 520
 521         acpi_table_print_madt_entry(header);
 522
 523         /* TBD: Support nimsrc entries? */
 524
 525         return 0;
 526 }
 527
 528 #endif                          /* CONFIG_X86_IO_APIC */
 529
 530 /*
 531  * acpi_pic_sci_set_trigger()
 532  *
 533  * use ELCR to set PIC-mode trigger type for SCI
 534  *
 535  * If a PIC-mode SCI is not recognized or gives spurious IRQ7's
 536  * it may require Edge Trigger -- use "acpi_sci=edge"
 537  *
 538  * Port 0x4d0-4d1 are ECLR1 and ECLR2, the Edge/Level Control Registers
 539  * for the 8259 PIC.  bit[n] = 1 means irq[n] is Level, otherwise Edge.
 540  * ECLR1 is IRQs 0-7 (IRQ 0, 1, 2 must be 0)
 541  * ECLR2 is IRQs 8-15 (IRQ 8, 13 must be 0)
 542  */
 543
 544 void __init acpi_pic_sci_set_trigger(unsigned int irq, u16 trigger)
 545 {
 546         unsigned int mask = 1 << irq;
 547         unsigned int old, new;
 548
 549         /* Real old ELCR mask */
 550         old = inb(0x4d0) | (inb(0x4d1) << 8);
 551
 552         /*
 553          * If we use ACPI to set PCI IRQs, then we should clear ELCR
 554          * since we will set it correctly as we enable the PCI irq
 555          * routing.
 556          */
 557         new = acpi_noirq ? old : 0;
 558
 559         /*
 560          * Update SCI information in the ELCR, it isn't in the PCI
 561          * routing tables..
 562          */
 563         switch (trigger) {
 564         case 1:         /* Edge - clear */
 565                 new &= ~mask;
 566                 break;
 567         case 3:         /* Level - set */
 568                 new |= mask;
 569                 break;
 570         }
 571
 572         if (old == new)
 573                 return;
 574
 575         printk(PREFIX "setting ELCR to %04x (from %04x)\n", new, old);
 576         outb(new, 0x4d0);
 577         outb(new >> 8, 0x4d1);
 578 }
 579
 580 int acpi_gsi_to_irq(u32 gsi, unsigned int *irqp)
 581 {
 582         int rc, irq, trigger, polarity;
 583
 584         if (acpi_irq_model == ACPI_IRQ_MODEL_PIC) {
 585                 *irqp = gsi;
 586                 return 0;
 587         }
 588
 589         rc = acpi_get_override_irq(gsi, &trigger, &polarity);
 590         if (rc == 0) {
 591                 trigger = trigger ? ACPI_LEVEL_SENSITIVE : ACPI_EDGE_SENSITIVE;
 592                 polarity = polarity ? ACPI_ACTIVE_LOW : ACPI_ACTIVE_HIGH;
 593                 irq = acpi_register_gsi(NULL, gsi, trigger, polarity);
 594                 if (irq >= 0) {
 595                         *irqp = irq;
 596                         return 0;
 597                 }
 598         }
 599
 600         return -1;
 601 }
 602 EXPORT_SYMBOL_GPL(acpi_gsi_to_irq);
 603
 604 int acpi_isa_irq_to_gsi(unsigned isa_irq, u32 *gsi)
 605 {
 606         if (isa_irq < nr_legacy_irqs() &&
 607             isa_irq_to_gsi[isa_irq] != ACPI_INVALID_GSI) {
 608                 *gsi = isa_irq_to_gsi[isa_irq];
 609                 return 0;
 610         }
 611
 612         return -1;
 613 }
 614
 615 static int acpi_register_gsi_pic(struct device *dev, u32 gsi,
 616                                  int trigger, int polarity)
 617 {
 618 #ifdef CONFIG_PCI
 619         /*
 620          * Make sure all (legacy) PCI IRQs are set as level-triggered.
 621          */
 622         if (trigger == ACPI_LEVEL_SENSITIVE)
 623                 elcr_set_level_irq(gsi);
 624 #endif
 625
 626         return gsi;
 627 }
 628
 629 #ifdef CONFIG_X86_LOCAL_APIC
 630 static int acpi_register_gsi_ioapic(struct device *dev, u32 gsi,
 631                                     int trigger, int polarity)
 632 {
 633         int irq = gsi;
 634 #ifdef CONFIG_X86_IO_APIC
 635         int node;
 636         struct irq_alloc_info info;
 637
 638         node = dev ? dev_to_node(dev) : NUMA_NO_NODE;
 639         trigger = trigger == ACPI_EDGE_SENSITIVE ? 0 : 1;
 640         polarity = polarity == ACPI_ACTIVE_HIGH ? 0 : 1;
 641         ioapic_set_alloc_attr(&info, node, trigger, polarity);
 642
 643         mutex_lock(&acpi_ioapic_lock);
 644         irq = mp_map_gsi_to_irq(gsi, IOAPIC_MAP_ALLOC, &info);
 645         /* Don't set up the ACPI SCI because it's already set up */
 646         if (irq >= 0 && enable_update_mptable &&
 647             acpi_gbl_FADT.sci_interrupt != gsi)
 648                 mp_config_acpi_gsi(dev, gsi, trigger, polarity);
 649         mutex_unlock(&acpi_ioapic_lock);
 650 #endif
 651
 652         return irq;
 653 }
 654
 655 static void acpi_unregister_gsi_ioapic(u32 gsi)
 656 {
 657 #ifdef CONFIG_X86_IO_APIC
 658         int irq;
 659
 660         mutex_lock(&acpi_ioapic_lock);
 661         irq = mp_map_gsi_to_irq(gsi, 0, NULL);
 662         if (irq > 0)
 663                 mp_unmap_irq(irq);
 664         mutex_unlock(&acpi_ioapic_lock);
 665 #endif
 666 }
 667 #endif
 668
 669 int (*__acpi_register_gsi)(struct device *dev, u32 gsi,
 670                            int trigger, int polarity) = acpi_register_gsi_pic;
 671 void (*__acpi_unregister_gsi)(u32 gsi) = NULL;
 672
 673 #ifdef CONFIG_ACPI_SLEEP
 674 int (*acpi_suspend_lowlevel)(void) = x86_acpi_suspend_lowlevel;
 675 #else
 676 int (*acpi_suspend_lowlevel)(void);
 677 #endif
 678
 679 /*
 680  * success: return IRQ number (>=0)
 681  * failure: return < 0
 682  */
 683 int acpi_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity)
 684 {
 685         return __acpi_register_gsi(dev, gsi, trigger, polarity);
 686 }
 687 EXPORT_SYMBOL_GPL(acpi_register_gsi);
 688
 689 void acpi_unregister_gsi(u32 gsi)
 690 {
 691         if (__acpi_unregister_gsi)
 692                 __acpi_unregister_gsi(gsi);
 693 }
 694 EXPORT_SYMBOL_GPL(acpi_unregister_gsi);
 695
 696 #ifdef CONFIG_X86_LOCAL_APIC
 697 static void __init acpi_set_irq_model_ioapic(void)
 698 {
 699         acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC;
 700         __acpi_register_gsi = acpi_register_gsi_ioapic;
 701         __acpi_unregister_gsi = acpi_unregister_gsi_ioapic;
 702         acpi_ioapic = 1;
 703 }
 704 #endif
 705
 706 /*
 707  *  ACPI based hotplug support for CPU
 708  */
 709 #ifdef CONFIG_ACPI_HOTPLUG_CPU
 710 #include <acpi/processor.h>
 711
 712 int acpi_map_cpu2node(acpi_handle handle, int cpu, int physid)
 713 {
 714 #ifdef CONFIG_ACPI_NUMA
 715         int nid;
 716
 717         nid = acpi_get_node(handle);
 718         if (nid != -1) {
 719                 set_apicid_to_node(physid, nid);
 720                 numa_set_node(cpu, nid);
 721         }
 722 #endif
 723         return 0;
 724 }
 725
 726 int acpi_map_cpu(acpi_handle handle, phys_cpuid_t physid, int *pcpu)
 727 {
 728         int cpu;
 729
 730         cpu = acpi_register_lapic(physid, U32_MAX, ACPI_MADT_ENABLED);
 731         if (cpu < 0) {
 732                 pr_info(PREFIX "Unable to map lapic to logical cpu number\n");
 733                 return cpu;
 734         }
 735
 736         acpi_processor_set_pdc(handle);
 737         acpi_map_cpu2node(handle, cpu, physid);
 738
 739         *pcpu = cpu;
 740         return 0;
 741 }
 742 EXPORT_SYMBOL(acpi_map_cpu);
 743
 744 int acpi_unmap_cpu(int cpu)
 745 {
 746 #ifdef CONFIG_ACPI_NUMA
 747         set_apicid_to_node(per_cpu(x86_cpu_to_apicid, cpu), NUMA_NO_NODE);
 748 #endif
 749
 750         per_cpu(x86_cpu_to_apicid, cpu) = -1;
 751         set_cpu_present(cpu, false);
 752         num_processors--;
 753
 754         return (0);
 755 }
 756 EXPORT_SYMBOL(acpi_unmap_cpu);
 757 #endif                          /* CONFIG_ACPI_HOTPLUG_CPU */
 758
 759 int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base)
 760 {
 761         int ret = -ENOSYS;
 762 #ifdef CONFIG_ACPI_HOTPLUG_IOAPIC
 763         int ioapic_id;
 764         u64 addr;
 765         struct ioapic_domain_cfg cfg = {
 766                 .type = IOAPIC_DOMAIN_DYNAMIC,
 767                 .ops = &mp_ioapic_irqdomain_ops,
 768         };
 769
 770         ioapic_id = acpi_get_ioapic_id(handle, gsi_base, &addr);
 771         if (ioapic_id < 0) {
 772                 unsigned long long uid;
 773                 acpi_status status;
 774
 775                 status = acpi_evaluate_integer(handle, METHOD_NAME__UID,
 776                                                NULL, &uid);
 777                 if (ACPI_FAILURE(status)) {
 778                         acpi_handle_warn(handle, "failed to get IOAPIC ID.\n");
 779                         return -EINVAL;
 780                 }
 781                 ioapic_id = (int)uid;
 782         }
 783
 784         mutex_lock(&acpi_ioapic_lock);
 785         ret  = mp_register_ioapic(ioapic_id, phys_addr, gsi_base, &cfg);
 786         mutex_unlock(&acpi_ioapic_lock);
 787 #endif
 788
 789         return ret;
 790 }
 791 EXPORT_SYMBOL(acpi_register_ioapic);
 792
 793 int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base)
 794 {
 795         int ret = -ENOSYS;
 796
 797 #ifdef CONFIG_ACPI_HOTPLUG_IOAPIC
 798         mutex_lock(&acpi_ioapic_lock);
 799         ret  = mp_unregister_ioapic(gsi_base);
 800         mutex_unlock(&acpi_ioapic_lock);
 801 #endif
 802
 803         return ret;
 804 }
 805 EXPORT_SYMBOL(acpi_unregister_ioapic);
 806
 807 /**
 808  * acpi_ioapic_registered - Check whether IOAPIC assoicatied with @gsi_base
 809  *                          has been registered
 810  * @handle:     ACPI handle of the IOAPIC deivce
 811  * @gsi_base:   GSI base associated with the IOAPIC
 812  *
 813  * Assume caller holds some type of lock to serialize acpi_ioapic_registered()
 814  * with acpi_register_ioapic()/acpi_unregister_ioapic().
 815  */
 816 int acpi_ioapic_registered(acpi_handle handle, u32 gsi_base)
 817 {
 818         int ret = 0;
 819
 820 #ifdef CONFIG_ACPI_HOTPLUG_IOAPIC
 821         mutex_lock(&acpi_ioapic_lock);
 822         ret  = mp_ioapic_registered(gsi_base);
 823         mutex_unlock(&acpi_ioapic_lock);
 824 #endif
 825
 826         return ret;
 827 }
 828
 829 static int __init acpi_parse_sbf(struct acpi_table_header *table)
 830 {
 831         struct acpi_table_boot *sb = (struct acpi_table_boot *)table;
 832
 833         sbf_port = sb->cmos_index;      /* Save CMOS port */
 834
 835         return 0;
 836 }
 837
 838 #ifdef CONFIG_HPET_TIMER
 839 #include <asm/hpet.h>
 840
 841 static struct resource *hpet_res __initdata;
 842
 843 static int __init acpi_parse_hpet(struct acpi_table_header *table)
 844 {
 845         struct acpi_table_hpet *hpet_tbl = (struct acpi_table_hpet *)table;
 846
 847         if (hpet_tbl->address.space_id != ACPI_SPACE_MEM) {
 848                 printk(KERN_WARNING PREFIX "HPET timers must be located in "
 849                        "memory.\n");
 850                 return -1;
 851         }
 852
 853         hpet_address = hpet_tbl->address.address;
 854         hpet_blockid = hpet_tbl->sequence;
 855
 856         /*
 857          * Some broken BIOSes advertise HPET at 0x0. We really do not
 858          * want to allocate a resource there.
 859          */
 860         if (!hpet_address) {
 861                 printk(KERN_WARNING PREFIX
 862                        "HPET id: %#x base: %#lx is invalid\n",
 863                        hpet_tbl->id, hpet_address);
 864                 return 0;
 865         }
 866 #ifdef CONFIG_X86_64
 867         /*
 868          * Some even more broken BIOSes advertise HPET at
 869          * 0xfed0000000000000 instead of 0xfed00000. Fix it up and add
 870          * some noise:
 871          */
 872         if (hpet_address == 0xfed0000000000000UL) {
 873                 if (!hpet_force_user) {
 874                         printk(KERN_WARNING PREFIX "HPET id: %#x "
 875                                "base: 0xfed0000000000000 is bogus\n "
 876                                "try hpet=force on the kernel command line to "
 877                                "fix it up to 0xfed00000.\n", hpet_tbl->id);
 878                         hpet_address = 0;
 879                         return 0;
 880                 }
 881                 printk(KERN_WARNING PREFIX
 882                        "HPET id: %#x base: 0xfed0000000000000 fixed up "
 883                        "to 0xfed00000.\n", hpet_tbl->id);
 884                 hpet_address >>= 32;
 885         }
 886 #endif
 887         printk(KERN_INFO PREFIX "HPET id: %#x base: %#lx\n",
 888                hpet_tbl->id, hpet_address);
 889
 890         /*
 891          * Allocate and initialize the HPET firmware resource for adding into
 892          * the resource tree during the lateinit timeframe.
 893          */
 894 #define HPET_RESOURCE_NAME_SIZE 9
 895         hpet_res = alloc_bootmem(sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE);
 896
 897         hpet_res->name = (void *)&hpet_res[1];
 898         hpet_res->flags = IORESOURCE_MEM;
 899         snprintf((char *)hpet_res->name, HPET_RESOURCE_NAME_SIZE, "HPET %u",
 900                  hpet_tbl->sequence);
 901
 902         hpet_res->start = hpet_address;
 903         hpet_res->end = hpet_address + (1 * 1024) - 1;
 904
 905         return 0;
 906 }
 907
 908 /*
 909  * hpet_insert_resource inserts the HPET resources used into the resource
 910  * tree.
 911  */
 912 static __init int hpet_insert_resource(void)
 913 {
 914         if (!hpet_res)
 915                 return 1;
 916
 917         return insert_resource(&iomem_resource, hpet_res);
 918 }
 919
 920 late_initcall(hpet_insert_resource);
 921
 922 #else
 923 #define acpi_parse_hpet NULL
 924 #endif
 925
 926 static int __init acpi_parse_fadt(struct acpi_table_header *table)
 927 {
 928         if (!(acpi_gbl_FADT.boot_flags & ACPI_FADT_LEGACY_DEVICES)) {
 929                 pr_debug("ACPI: no legacy devices present\n");
 930                 x86_platform.legacy.devices.pnpbios = 0;
 931         }
 932
 933         if (acpi_gbl_FADT.boot_flags & ACPI_FADT_NO_CMOS_RTC) {
 934                 pr_debug("ACPI: not registering RTC platform device\n");
 935                 x86_platform.legacy.rtc = 0;
 936         }
 937
 938 #ifdef CONFIG_X86_PM_TIMER
 939         /* detect the location of the ACPI PM Timer */
 940         if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID) {
 941                 /* FADT rev. 2 */
 942                 if (acpi_gbl_FADT.xpm_timer_block.space_id !=
 943                     ACPI_ADR_SPACE_SYSTEM_IO)
 944                         return 0;
 945
 946                 pmtmr_ioport = acpi_gbl_FADT.xpm_timer_block.address;
 947                 /*
 948                  * "X" fields are optional extensions to the original V1.0
 949                  * fields, so we must selectively expand V1.0 fields if the
 950                  * corresponding X field is zero.
 951                  */
 952                 if (!pmtmr_ioport)
 953                         pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
 954         } else {
 955                 /* FADT rev. 1 */
 956                 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
 957         }
 958         if (pmtmr_ioport)
 959                 printk(KERN_INFO PREFIX "PM-Timer IO Port: %#x\n",
 960                        pmtmr_ioport);
 961 #endif
 962         return 0;
 963 }
 964
 965 #ifdef  CONFIG_X86_LOCAL_APIC
 966 /*
 967  * Parse LAPIC entries in MADT
 968  * returns 0 on success, < 0 on error
 969  */
 970
 971 static int __init early_acpi_parse_madt_lapic_addr_ovr(void)
 972 {
 973         int count;
 974
 975         if (!boot_cpu_has(X86_FEATURE_APIC))
 976                 return -ENODEV;
 977
 978         /*
 979          * Note that the LAPIC address is obtained from the MADT (32-bit value)
 980          * and (optionally) overridden by a LAPIC_ADDR_OVR entry (64-bit value).
 981          */
 982
 983         count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
 984                                       acpi_parse_lapic_addr_ovr, 0);
 985         if (count < 0) {
 986                 printk(KERN_ERR PREFIX
 987                        "Error parsing LAPIC address override entry\n");
 988                 return count;
 989         }
 990
 991         register_lapic_address(acpi_lapic_addr);
 992
 993         return count;
 994 }
 995
 996 static int __init acpi_parse_madt_lapic_entries(void)
 997 {
 998         int count;
 999         int x2count = 0;
1000         int ret;
1001         struct acpi_subtable_proc madt_proc[2];
1002
1003         if (!boot_cpu_has(X86_FEATURE_APIC))
1004                 return -ENODEV;
1005
1006         count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC,
1007                                       acpi_parse_sapic, MAX_LOCAL_APIC);
1008
1009         if (!count) {
1010                 memset(madt_proc, 0, sizeof(madt_proc));
1011                 madt_proc[0].id = ACPI_MADT_TYPE_LOCAL_APIC;
1012                 madt_proc[0].handler = acpi_parse_lapic;
1013                 madt_proc[1].id = ACPI_MADT_TYPE_LOCAL_X2APIC;
1014                 madt_proc[1].handler = acpi_parse_x2apic;
1015                 ret = acpi_table_parse_entries_array(ACPI_SIG_MADT,
1016                                 sizeof(struct acpi_table_madt),
1017                                 madt_proc, ARRAY_SIZE(madt_proc), MAX_LOCAL_APIC);
1018                 if (ret < 0) {
1019                         printk(KERN_ERR PREFIX
1020                                         "Error parsing LAPIC/X2APIC entries\n");
1021                         return ret;
1022                 }
1023
1024                 count = madt_proc[0].count;
1025                 x2count = madt_proc[1].count;
1026         }
1027         if (!count && !x2count) {
1028                 printk(KERN_ERR PREFIX "No LAPIC entries present\n");
1029                 /* TBD: Cleanup to allow fallback to MPS */
1030                 return -ENODEV;
1031         } else if (count < 0 || x2count < 0) {
1032                 printk(KERN_ERR PREFIX "Error parsing LAPIC entry\n");
1033                 /* TBD: Cleanup to allow fallback to MPS */
1034                 return count;
1035         }
1036
1037         x2count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC_NMI,
1038                                         acpi_parse_x2apic_nmi, 0);
1039         count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI,
1040                                       acpi_parse_lapic_nmi, 0);
1041         if (count < 0 || x2count < 0) {
1042                 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n");
1043                 /* TBD: Cleanup to allow fallback to MPS */
1044                 return count;
1045         }
1046         return 0;
1047 }
1048 #endif                          /* CONFIG_X86_LOCAL_APIC */
1049
1050 #ifdef  CONFIG_X86_IO_APIC
1051 static void __init mp_config_acpi_legacy_irqs(void)
1052 {
1053         int i;
1054         struct mpc_intsrc mp_irq;
1055
1056 #ifdef CONFIG_EISA
1057         /*
1058          * Fabricate the legacy ISA bus (bus #31).
1059          */
1060         mp_bus_id_to_type[MP_ISA_BUS] = MP_BUS_ISA;
1061 #endif
1062         set_bit(MP_ISA_BUS, mp_bus_not_pci);
1063         pr_debug("Bus #%d is ISA\n", MP_ISA_BUS);
1064
1065         /*
1066          * Use the default configuration for the IRQs 0-15.  Unless
1067          * overridden by (MADT) interrupt source override entries.
1068          */
1069         for (i = 0; i < nr_legacy_irqs(); i++) {
1070                 int ioapic, pin;
1071                 unsigned int dstapic;
1072                 int idx;
1073                 u32 gsi;
1074
1075                 /* Locate the gsi that irq i maps to. */
1076                 if (acpi_isa_irq_to_gsi(i, &gsi))
1077                         continue;
1078
1079                 /*
1080                  * Locate the IOAPIC that manages the ISA IRQ.
1081                  */
1082                 ioapic = mp_find_ioapic(gsi);
1083                 if (ioapic < 0)
1084                         continue;
1085                 pin = mp_find_ioapic_pin(ioapic, gsi);
1086                 dstapic = mpc_ioapic_id(ioapic);
1087
1088                 for (idx = 0; idx < mp_irq_entries; idx++) {
1089                         struct mpc_intsrc *irq = mp_irqs + idx;
1090
1091                         /* Do we already have a mapping for this ISA IRQ? */
1092                         if (irq->srcbus == MP_ISA_BUS && irq->srcbusirq == i)
1093                                 break;
1094
1095                         /* Do we already have a mapping for this IOAPIC pin */
1096                         if (irq->dstapic == dstapic && irq->dstirq == pin)
1097                                 break;
1098                 }
1099
1100                 if (idx != mp_irq_entries) {
1101                         printk(KERN_DEBUG "ACPI: IRQ%d used by override.\n", i);
1102                         continue;       /* IRQ already used */
1103                 }
1104
1105                 mp_irq.type = MP_INTSRC;
1106                 mp_irq.irqflag = 0;     /* Conforming */
1107                 mp_irq.srcbus = MP_ISA_BUS;
1108                 mp_irq.dstapic = dstapic;
1109                 mp_irq.irqtype = mp_INT;
1110                 mp_irq.srcbusirq = i; /* Identity mapped */
1111                 mp_irq.dstirq = pin;
1112
1113                 mp_save_irq(&mp_irq);
1114         }
1115 }
1116
1117 /*
1118  * Parse IOAPIC related entries in MADT
1119  * returns 0 on success, < 0 on error
1120  */
1121 static int __init acpi_parse_madt_ioapic_entries(void)
1122 {
1123         int count;
1124
1125         /*
1126          * ACPI interpreter is required to complete interrupt setup,
1127          * so if it is off, don't enumerate the io-apics with ACPI.
1128          * If MPS is present, it will handle them,
1129          * otherwise the system will stay in PIC mode
1130          */
1131         if (acpi_disabled || acpi_noirq)
1132                 return -ENODEV;
1133
1134         if (!boot_cpu_has(X86_FEATURE_APIC))
1135                 return -ENODEV;
1136
1137         /*
1138          * if "noapic" boot option, don't look for IO-APICs
1139          */
1140         if (skip_ioapic_setup) {
1141                 printk(KERN_INFO PREFIX "Skipping IOAPIC probe "
1142                        "due to 'noapic' option.\n");
1143                 return -ENODEV;
1144         }
1145
1146         count = acpi_table_parse_madt(ACPI_MADT_TYPE_IO_APIC, acpi_parse_ioapic,
1147                                       MAX_IO_APICS);
1148         if (!count) {
1149                 printk(KERN_ERR PREFIX "No IOAPIC entries present\n");
1150                 return -ENODEV;
1151         } else if (count < 0) {
1152                 printk(KERN_ERR PREFIX "Error parsing IOAPIC entry\n");
1153                 return count;
1154         }
1155
1156         count = acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE,
1157                                       acpi_parse_int_src_ovr, nr_irqs);
1158         if (count < 0) {
1159                 printk(KERN_ERR PREFIX
1160                        "Error parsing interrupt source overrides entry\n");
1161                 /* TBD: Cleanup to allow fallback to MPS */
1162                 return count;
1163         }
1164
1165         /*
1166          * If BIOS did not supply an INT_SRC_OVR for the SCI
1167          * pretend we got one so we can set the SCI flags.
1168          */
1169         if (!acpi_sci_override_gsi)
1170                 acpi_sci_ioapic_setup(acpi_gbl_FADT.sci_interrupt, 0, 0,
1171                                       acpi_gbl_FADT.sci_interrupt);
1172
1173         /* Fill in identity legacy mappings where no override */
1174         mp_config_acpi_legacy_irqs();
1175
1176         count = acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE,
1177                                       acpi_parse_nmi_src, nr_irqs);
1178         if (count < 0) {
1179                 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n");
1180                 /* TBD: Cleanup to allow fallback to MPS */
1181                 return count;
1182         }
1183
1184         return 0;
1185 }
1186 #else
1187 static inline int acpi_parse_madt_ioapic_entries(void)
1188 {
1189         return -1;
1190 }
1191 #endif  /* !CONFIG_X86_IO_APIC */
1192
1193 static void __init early_acpi_process_madt(void)
1194 {
1195 #ifdef CONFIG_X86_LOCAL_APIC
1196         int error;
1197
1198         if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1199
1200                 /*
1201                  * Parse MADT LAPIC entries
1202                  */
1203                 error = early_acpi_parse_madt_lapic_addr_ovr();
1204                 if (!error) {
1205                         acpi_lapic = 1;
1206                         smp_found_config = 1;
1207                 }
1208                 if (error == -EINVAL) {
1209                         /*
1210                          * Dell Precision Workstation 410, 610 come here.
1211                          */
1212                         printk(KERN_ERR PREFIX
1213                                "Invalid BIOS MADT, disabling ACPI\n");
1214                         disable_acpi();
1215                 }
1216         }
1217 #endif
1218 }
1219
1220 static void __init acpi_process_madt(void)
1221 {
1222 #ifdef CONFIG_X86_LOCAL_APIC
1223         int error;
1224
1225         if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1226
1227                 /*
1228                  * Parse MADT LAPIC entries
1229                  */
1230                 error = acpi_parse_madt_lapic_entries();
1231                 if (!error) {
1232                         acpi_lapic = 1;
1233
1234                         /*
1235                          * Parse MADT IO-APIC entries
1236                          */
1237                         mutex_lock(&acpi_ioapic_lock);
1238                         error = acpi_parse_madt_ioapic_entries();
1239                         mutex_unlock(&acpi_ioapic_lock);
1240                         if (!error) {
1241                                 acpi_set_irq_model_ioapic();
1242
1243                                 smp_found_config = 1;
1244                         }
1245                 }
1246                 if (error == -EINVAL) {
1247                         /*
1248                          * Dell Precision Workstation 410, 610 come here.
1249                          */
1250                         printk(KERN_ERR PREFIX
1251                                "Invalid BIOS MADT, disabling ACPI\n");
1252                         disable_acpi();
1253                 }
1254         } else {
1255                 /*
1256                  * ACPI found no MADT, and so ACPI wants UP PIC mode.
1257                  * In the event an MPS table was found, forget it.
1258                  * Boot with "acpi=off" to use MPS on such a system.
1259                  */
1260                 if (smp_found_config) {
1261                         printk(KERN_WARNING PREFIX
1262                                 "No APIC-table, disabling MPS\n");
1263                         smp_found_config = 0;
1264                 }
1265         }
1266
1267         /*
1268          * ACPI supports both logical (e.g. Hyper-Threading) and physical
1269          * processors, where MPS only supports physical.
1270          */
1271         if (acpi_lapic && acpi_ioapic)
1272                 printk(KERN_INFO "Using ACPI (MADT) for SMP configuration "
1273                        "information\n");
1274         else if (acpi_lapic)
1275                 printk(KERN_INFO "Using ACPI for processor (LAPIC) "
1276                        "configuration information\n");
1277 #endif
1278         return;
1279 }
1280
1281 static int __init disable_acpi_irq(const struct dmi_system_id *d)
1282 {
1283         if (!acpi_force) {
1284                 printk(KERN_NOTICE "%s detected: force use of acpi=noirq\n",
1285                        d->ident);
1286                 acpi_noirq_set();
1287         }
1288         return 0;
1289 }
1290
1291 static int __init disable_acpi_pci(const struct dmi_system_id *d)
1292 {
1293         if (!acpi_force) {
1294                 printk(KERN_NOTICE "%s detected: force use of pci=noacpi\n",
1295                        d->ident);
1296                 acpi_disable_pci();
1297         }
1298         return 0;
1299 }
1300
1301 static int __init dmi_disable_acpi(const struct dmi_system_id *d)
1302 {
1303         if (!acpi_force) {
1304                 printk(KERN_NOTICE "%s detected: acpi off\n", d->ident);
1305                 disable_acpi();
1306         } else {
1307                 printk(KERN_NOTICE
1308                        "Warning: DMI blacklist says broken, but acpi forced\n");
1309         }
1310         return 0;
1311 }
1312
1313 /*
1314  * Force ignoring BIOS IRQ0 override
1315  */
1316 static int __init dmi_ignore_irq0_timer_override(const struct dmi_system_id *d)
1317 {
1318         if (!acpi_skip_timer_override) {
1319                 pr_notice("%s detected: Ignoring BIOS IRQ0 override\n",
1320                         d->ident);
1321                 acpi_skip_timer_override = 1;
1322         }
1323         return 0;
1324 }
1325
1326 /*
1327  * ACPI offers an alternative platform interface model that removes
1328  * ACPI hardware requirements for platforms that do not implement
1329  * the PC Architecture.
1330  *
1331  * We initialize the Hardware-reduced ACPI model here:
1332  */
1333 static void __init acpi_reduced_hw_init(void)
1334 {
1335         if (acpi_gbl_reduced_hardware) {
1336                 /*
1337                  * Override x86_init functions and bypass legacy pic
1338                  * in Hardware-reduced ACPI mode
1339                  */
1340                 x86_init.timers.timer_init      = x86_init_noop;
1341                 x86_init.irqs.pre_vector_init   = x86_init_noop;
1342                 legacy_pic                      = &null_legacy_pic;
1343         }
1344 }
1345
1346 /*
1347  * If your system is blacklisted here, but you find that acpi=force
1348  * works for you, please contact linux-acpi@vger.kernel.org
1349  */
1350 static struct dmi_system_id __initdata acpi_dmi_table[] = {
1351         /*
1352          * Boxes that need ACPI disabled
1353          */
1354         {
1355          .callback = dmi_disable_acpi,
1356          .ident = "IBM Thinkpad",
1357          .matches = {
1358                      DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1359                      DMI_MATCH(DMI_BOARD_NAME, "2629H1G"),
1360                      },
1361          },
1362
1363         /*
1364          * Boxes that need ACPI PCI IRQ routing disabled
1365          */
1366         {
1367          .callback = disable_acpi_irq,
1368          .ident = "ASUS A7V",
1369          .matches = {
1370                      DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC"),
1371                      DMI_MATCH(DMI_BOARD_NAME, "<A7V>"),
1372                      /* newer BIOS, Revision 1011, does work */
1373                      DMI_MATCH(DMI_BIOS_VERSION,
1374                                "ASUS A7V ACPI BIOS Revision 1007"),
1375                      },
1376          },
1377         {
1378                 /*
1379                  * Latest BIOS for IBM 600E (1.16) has bad pcinum
1380                  * for LPC bridge, which is needed for the PCI
1381                  * interrupt links to work. DSDT fix is in bug 5966.
1382                  * 2645, 2646 model numbers are shared with 600/600E/600X
1383                  */
1384          .callback = disable_acpi_irq,
1385          .ident = "IBM Thinkpad 600 Series 2645",
1386          .matches = {
1387                      DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1388                      DMI_MATCH(DMI_BOARD_NAME, "2645"),
1389                      },
1390          },
1391         {
1392          .callback = disable_acpi_irq,
1393          .ident = "IBM Thinkpad 600 Series 2646",
1394          .matches = {
1395                      DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1396                      DMI_MATCH(DMI_BOARD_NAME, "2646"),
1397                      },
1398          },
1399         /*
1400          * Boxes that need ACPI PCI IRQ routing and PCI scan disabled
1401          */
1402         {                       /* _BBN 0 bug */
1403          .callback = disable_acpi_pci,
1404          .ident = "ASUS PR-DLS",
1405          .matches = {
1406                      DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1407                      DMI_MATCH(DMI_BOARD_NAME, "PR-DLS"),
1408                      DMI_MATCH(DMI_BIOS_VERSION,
1409                                "ASUS PR-DLS ACPI BIOS Revision 1010"),
1410                      DMI_MATCH(DMI_BIOS_DATE, "03/21/2003")
1411                      },
1412          },
1413         {
1414          .callback = disable_acpi_pci,
1415          .ident = "Acer TravelMate 36x Laptop",
1416          .matches = {
1417                      DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
1418                      DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"),
1419                      },
1420          },
1421         {}
1422 };
1423
1424 /* second table for DMI checks that should run after early-quirks */
1425 static struct dmi_system_id __initdata acpi_dmi_table_late[] = {
1426         /*
1427          * HP laptops which use a DSDT reporting as HP/SB400/10000,
1428          * which includes some code which overrides all temperature
1429          * trip points to 16C if the INTIN2 input of the I/O APIC
1430          * is enabled.  This input is incorrectly designated the
1431          * ISA IRQ 0 via an interrupt source override even though
1432          * it is wired to the output of the master 8259A and INTIN0
1433          * is not connected at all.  Force ignoring BIOS IRQ0
1434          * override in that cases.
1435          */
1436         {
1437          .callback = dmi_ignore_irq0_timer_override,
1438          .ident = "HP nx6115 laptop",
1439          .matches = {
1440                      DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1441                      DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6115"),
1442                      },
1443          },
1444         {
1445          .callback = dmi_ignore_irq0_timer_override,
1446          .ident = "HP NX6125 laptop",
1447          .matches = {
1448                      DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1449                      DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6125"),
1450                      },
1451          },
1452         {
1453          .callback = dmi_ignore_irq0_timer_override,
1454          .ident = "HP NX6325 laptop",
1455          .matches = {
1456                      DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1457                      DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6325"),
1458                      },
1459          },
1460         {
1461          .callback = dmi_ignore_irq0_timer_override,
1462          .ident = "HP 6715b laptop",
1463          .matches = {
1464                      DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1465                      DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq 6715b"),
1466                      },
1467          },
1468         {
1469          .callback = dmi_ignore_irq0_timer_override,
1470          .ident = "FUJITSU SIEMENS",
1471          .matches = {
1472                      DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
1473                      DMI_MATCH(DMI_PRODUCT_NAME, "AMILO PRO V2030"),
1474                      },
1475          },
1476         {}
1477 };
1478
1479 /*
1480  * acpi_boot_table_init() and acpi_boot_init()
1481  *  called from setup_arch(), always.
1482  *      1. checksums all tables
1483  *      2. enumerates lapics
1484  *      3. enumerates io-apics
1485  *
1486  * acpi_table_init() is separate to allow reading SRAT without
1487  * other side effects.
1488  *
1489  * side effects of acpi_boot_init:
1490  *      acpi_lapic = 1 if LAPIC found
1491  *      acpi_ioapic = 1 if IOAPIC found
1492  *      if (acpi_lapic && acpi_ioapic) smp_found_config = 1;
1493  *      if acpi_blacklisted() acpi_disabled = 1;
1494  *      acpi_irq_model=...
1495  *      ...
1496  */
1497
1498 void __init acpi_boot_table_init(void)
1499 {
1500         dmi_check_system(acpi_dmi_table);
1501
1502         /*
1503          * If acpi_disabled, bail out
1504          */
1505         if (acpi_disabled)
1506                 return;
1507
1508         /*
1509          * Initialize the ACPI boot-time table parser.
1510          */
1511         if (acpi_table_init()) {
1512                 disable_acpi();
1513                 return;
1514         }
1515
1516         acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1517
1518         /*
1519          * blacklist may disable ACPI entirely
1520          */
1521         if (acpi_blacklisted()) {
1522                 if (acpi_force) {
1523                         printk(KERN_WARNING PREFIX "acpi=force override\n");
1524                 } else {
1525                         printk(KERN_WARNING PREFIX "Disabling ACPI support\n");
1526                         disable_acpi();
1527                         return;
1528                 }
1529         }
1530 }
1531
1532 int __init early_acpi_boot_init(void)
1533 {
1534         /*
1535          * If acpi_disabled, bail out
1536          */
1537         if (acpi_disabled)
1538                 return 1;
1539
1540         /*
1541          * Process the Multiple APIC Description Table (MADT), if present
1542          */
1543         early_acpi_process_madt();
1544
1545         /*
1546          * Hardware-reduced ACPI mode initialization:
1547          */
1548         acpi_reduced_hw_init();
1549
1550         return 0;
1551 }
1552
1553 int __init acpi_boot_init(void)
1554 {
1555         /* those are executed after early-quirks are executed */
1556         dmi_check_system(acpi_dmi_table_late);
1557
1558         /*
1559          * If acpi_disabled, bail out
1560          */
1561         if (acpi_disabled)
1562                 return 1;
1563
1564         acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1565
1566         /*
1567          * set sci_int and PM timer address
1568          */
1569         acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt);
1570
1571         /*
1572          * Process the Multiple APIC Description Table (MADT), if present
1573          */
1574         acpi_process_madt();
1575
1576         acpi_table_parse(ACPI_SIG_HPET, acpi_parse_hpet);
1577
1578         if (!acpi_noirq)
1579                 x86_init.pci.init = pci_acpi_init;
1580
1581         return 0;
1582 }
1583
1584 static int __init parse_acpi(char *arg)
1585 {
1586         if (!arg)
1587                 return -EINVAL;
1588
1589         /* "acpi=off" disables both ACPI table parsing and interpreter */
1590         if (strcmp(arg, "off") == 0) {
1591                 disable_acpi();
1592         }
1593         /* acpi=force to over-ride black-list */
1594         else if (strcmp(arg, "force") == 0) {
1595                 acpi_force = 1;
1596                 acpi_disabled = 0;
1597         }
1598         /* acpi=strict disables out-of-spec workarounds */
1599         else if (strcmp(arg, "strict") == 0) {
1600                 acpi_strict = 1;
1601         }
1602         /* acpi=rsdt use RSDT instead of XSDT */
1603         else if (strcmp(arg, "rsdt") == 0) {
1604                 acpi_gbl_do_not_use_xsdt = TRUE;
1605         }
1606         /* "acpi=noirq" disables ACPI interrupt routing */
1607         else if (strcmp(arg, "noirq") == 0) {
1608                 acpi_noirq_set();
1609         }
1610         /* "acpi=copy_dsdt" copys DSDT */
1611         else if (strcmp(arg, "copy_dsdt") == 0) {
1612                 acpi_gbl_copy_dsdt_locally = 1;
1613         }
1614         /* "acpi=nocmcff" disables FF mode for corrected errors */
1615         else if (strcmp(arg, "nocmcff") == 0) {
1616                 acpi_disable_cmcff = 1;
1617         } else {
1618                 /* Core will printk when we return error. */
1619                 return -EINVAL;
1620         }
1621         return 0;
1622 }
1623 early_param("acpi", parse_acpi);
1624
1625 /* FIXME: Using pci= for an ACPI parameter is a travesty. */
1626 static int __init parse_pci(char *arg)
1627 {
1628         if (arg && strcmp(arg, "noacpi") == 0)
1629                 acpi_disable_pci();
1630         return 0;
1631 }
1632 early_param("pci", parse_pci);
1633
1634 int __init acpi_mps_check(void)
1635 {
1636 #if defined(CONFIG_X86_LOCAL_APIC) && !defined(CONFIG_X86_MPPARSE)
1637 /* mptable code is not built-in*/
1638         if (acpi_disabled || acpi_noirq) {
1639                 printk(KERN_WARNING "MPS support code is not built-in.\n"
1640                        "Using acpi=off or acpi=noirq or pci=noacpi "
1641                        "may have problem\n");
1642                 return 1;
1643         }
1644 #endif
1645         return 0;
1646 }
1647
1648 #ifdef CONFIG_X86_IO_APIC
1649 static int __init parse_acpi_skip_timer_override(char *arg)
1650 {
1651         acpi_skip_timer_override = 1;
1652         return 0;
1653 }
1654 early_param("acpi_skip_timer_override", parse_acpi_skip_timer_override);
1655
1656 static int __init parse_acpi_use_timer_override(char *arg)
1657 {
1658         acpi_use_timer_override = 1;
1659         return 0;
1660 }
1661 early_param("acpi_use_timer_override", parse_acpi_use_timer_override);
1662 #endif /* CONFIG_X86_IO_APIC */
1663
1664 static int __init setup_acpi_sci(char *s)
1665 {
1666         if (!s)
1667                 return -EINVAL;
1668         if (!strcmp(s, "edge"))
1669                 acpi_sci_flags =  ACPI_MADT_TRIGGER_EDGE |
1670                         (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1671         else if (!strcmp(s, "level"))
1672                 acpi_sci_flags = ACPI_MADT_TRIGGER_LEVEL |
1673                         (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1674         else if (!strcmp(s, "high"))
1675                 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_HIGH |
1676                         (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1677         else if (!strcmp(s, "low"))
1678                 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_LOW |
1679                         (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1680         else
1681                 return -EINVAL;
1682         return 0;
1683 }
1684 early_param("acpi_sci", setup_acpi_sci);
1685
1686 int __acpi_acquire_global_lock(unsigned int *lock)
1687 {
1688         unsigned int old, new, val;
1689         do {
1690                 old = *lock;
1691                 new = (((old & ~0x3) + 2) + ((old >> 1) & 0x1));
1692                 val = cmpxchg(lock, old, new);
1693         } while (unlikely (val != old));
1694         return (new < 3) ? -1 : 0;
1695 }
1696
1697 int __acpi_release_global_lock(unsigned int *lock)
1698 {
1699         unsigned int old, new, val;
1700         do {
1701                 old = *lock;
1702                 new = old & ~0x3;
1703                 val = cmpxchg(lock, old, new);
1704         } while (unlikely (val != old));
1705         return old & 0x1;
1706 }
1707
1708 void __init arch_reserve_mem_area(acpi_physical_address addr, size_t size)
1709 {
1710         e820_add_region(addr, size, E820_ACPI);
1711         update_e820();
1712 }