arch/x86/kernel/acpi/boot.c

   1 /*
   2  *  boot.c - Architecture-Specific Low-Level ACPI Boot Support
   3  *
   4  *  Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
   5  *  Copyright (C) 2001 Jun Nakajima <jun.nakajima@intel.com>
   6  *
   7  * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   8  *
   9  *  This program is free software; you can redistribute it and/or modify
  10  *  it under the terms of the GNU General Public License as published by
  11  *  the Free Software Foundation; either version 2 of the License, or
  12  *  (at your option) any later version.
  13  *
  14  *  This program is distributed in the hope that it will be useful,
  15  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  *  GNU General Public License for more details.
  18  *
  19  *  You should have received a copy of the GNU General Public License
  20  *  along with this program; if not, write to the Free Software
  21  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  22  *
  23  * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  24  */
  25
  26 #include <linux/init.h>
  27 #include <linux/acpi.h>
  28 #include <linux/acpi_pmtmr.h>
  29 #include <linux/efi.h>
  30 #include <linux/cpumask.h>
  31 #include <linux/module.h>
  32 #include <linux/dmi.h>
  33 #include <linux/irq.h>
  34 #include <linux/irqdomain.h>
  35 #include <linux/slab.h>
  36 #include <linux/bootmem.h>
  37 #include <linux/ioport.h>
  38 #include <linux/pci.h>
  39
  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 (!cpu_has_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  * @enabled: this cpu is enabled or not
 165  *
 166  * Returns the logic cpu number which maps to the local apic
 167  */
 168 static int acpi_register_lapic(int id, u8 enabled)
 169 {
 170         unsigned int ver = 0;
 171
 172         if (id >= MAX_LOCAL_APIC) {
 173                 printk(KERN_INFO PREFIX "skipped apicid that is too big\n");
 174                 return -EINVAL;
 175         }
 176
 177         if (!enabled) {
 178                 ++disabled_cpus;
 179                 return -EINVAL;
 180         }
 181
 182         if (boot_cpu_physical_apicid != -1U)
 183                 ver = apic_version[boot_cpu_physical_apicid];
 184
 185         return generic_processor_info(id, ver);
 186 }
 187
 188 static int __init
 189 acpi_parse_x2apic(struct acpi_subtable_header *header, const unsigned long end)
 190 {
 191         struct acpi_madt_local_x2apic *processor = NULL;
 192         int apic_id;
 193         u8 enabled;
 194
 195         processor = (struct acpi_madt_local_x2apic *)header;
 196
 197         if (BAD_MADT_ENTRY(processor, end))
 198                 return -EINVAL;
 199
 200         acpi_table_print_madt_entry(header);
 201
 202         apic_id = processor->local_apic_id;
 203         enabled = processor->lapic_flags & ACPI_MADT_ENABLED;
 204 #ifdef CONFIG_X86_X2APIC
 205         /*
 206          * We need to register disabled CPU as well to permit
 207          * counting disabled CPUs. This allows us to size
 208          * cpus_possible_map more accurately, to permit
 209          * to not preallocating memory for all NR_CPUS
 210          * when we use CPU hotplug.
 211          */
 212         if (!apic->apic_id_valid(apic_id) && enabled)
 213                 printk(KERN_WARNING PREFIX "x2apic entry ignored\n");
 214         else
 215                 acpi_register_lapic(apic_id, enabled);
 216 #else
 217         printk(KERN_WARNING PREFIX "x2apic entry ignored\n");
 218 #endif
 219
 220         return 0;
 221 }
 222
 223 static int __init
 224 acpi_parse_lapic(struct acpi_subtable_header * header, const unsigned long end)
 225 {
 226         struct acpi_madt_local_apic *processor = NULL;
 227
 228         processor = (struct acpi_madt_local_apic *)header;
 229
 230         if (BAD_MADT_ENTRY(processor, end))
 231                 return -EINVAL;
 232
 233         acpi_table_print_madt_entry(header);
 234
 235         /*
 236          * We need to register disabled CPU as well to permit
 237          * counting disabled CPUs. This allows us to size
 238          * cpus_possible_map more accurately, to permit
 239          * to not preallocating memory for all NR_CPUS
 240          * when we use CPU hotplug.
 241          */
 242         acpi_register_lapic(processor->id,      /* APIC ID */
 243                             processor->lapic_flags & ACPI_MADT_ENABLED);
 244
 245         return 0;
 246 }
 247
 248 static int __init
 249 acpi_parse_sapic(struct acpi_subtable_header *header, const unsigned long end)
 250 {
 251         struct acpi_madt_local_sapic *processor = NULL;
 252
 253         processor = (struct acpi_madt_local_sapic *)header;
 254
 255         if (BAD_MADT_ENTRY(processor, end))
 256                 return -EINVAL;
 257
 258         acpi_table_print_madt_entry(header);
 259
 260         acpi_register_lapic((processor->id << 8) | processor->eid,/* APIC ID */
 261                             processor->lapic_flags & ACPI_MADT_ENABLED);
 262
 263         return 0;
 264 }
 265
 266 static int __init
 267 acpi_parse_lapic_addr_ovr(struct acpi_subtable_header * header,
 268                           const unsigned long end)
 269 {
 270         struct acpi_madt_local_apic_override *lapic_addr_ovr = NULL;
 271
 272         lapic_addr_ovr = (struct acpi_madt_local_apic_override *)header;
 273
 274         if (BAD_MADT_ENTRY(lapic_addr_ovr, end))
 275                 return -EINVAL;
 276
 277         acpi_lapic_addr = lapic_addr_ovr->address;
 278
 279         return 0;
 280 }
 281
 282 static int __init
 283 acpi_parse_x2apic_nmi(struct acpi_subtable_header *header,
 284                       const unsigned long end)
 285 {
 286         struct acpi_madt_local_x2apic_nmi *x2apic_nmi = NULL;
 287
 288         x2apic_nmi = (struct acpi_madt_local_x2apic_nmi *)header;
 289
 290         if (BAD_MADT_ENTRY(x2apic_nmi, end))
 291                 return -EINVAL;
 292
 293         acpi_table_print_madt_entry(header);
 294
 295         if (x2apic_nmi->lint != 1)
 296                 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n");
 297
 298         return 0;
 299 }
 300
 301 static int __init
 302 acpi_parse_lapic_nmi(struct acpi_subtable_header * header, const unsigned long end)
 303 {
 304         struct acpi_madt_local_apic_nmi *lapic_nmi = NULL;
 305
 306         lapic_nmi = (struct acpi_madt_local_apic_nmi *)header;
 307
 308         if (BAD_MADT_ENTRY(lapic_nmi, end))
 309                 return -EINVAL;
 310
 311         acpi_table_print_madt_entry(header);
 312
 313         if (lapic_nmi->lint != 1)
 314                 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n");
 315
 316         return 0;
 317 }
 318
 319 #endif                          /*CONFIG_X86_LOCAL_APIC */
 320
 321 #ifdef CONFIG_X86_IO_APIC
 322 #define MP_ISA_BUS              0
 323
 324 static void __init mp_override_legacy_irq(u8 bus_irq, u8 polarity, u8 trigger,
 325                                           u32 gsi)
 326 {
 327         int ioapic;
 328         int pin;
 329         struct mpc_intsrc mp_irq;
 330
 331         /*
 332          * Convert 'gsi' to 'ioapic.pin'.
 333          */
 334         ioapic = mp_find_ioapic(gsi);
 335         if (ioapic < 0)
 336                 return;
 337         pin = mp_find_ioapic_pin(ioapic, gsi);
 338
 339         /*
 340          * TBD: This check is for faulty timer entries, where the override
 341          *      erroneously sets the trigger to level, resulting in a HUGE
 342          *      increase of timer interrupts!
 343          */
 344         if ((bus_irq == 0) && (trigger == 3))
 345                 trigger = 1;
 346
 347         mp_irq.type = MP_INTSRC;
 348         mp_irq.irqtype = mp_INT;
 349         mp_irq.irqflag = (trigger << 2) | polarity;
 350         mp_irq.srcbus = MP_ISA_BUS;
 351         mp_irq.srcbusirq = bus_irq;     /* IRQ */
 352         mp_irq.dstapic = mpc_ioapic_id(ioapic); /* APIC ID */
 353         mp_irq.dstirq = pin;    /* INTIN# */
 354
 355         mp_save_irq(&mp_irq);
 356
 357         /*
 358          * Reset default identity mapping if gsi is also an legacy IRQ,
 359          * otherwise there will be more than one entry with the same GSI
 360          * and acpi_isa_irq_to_gsi() may give wrong result.
 361          */
 362         if (gsi < nr_legacy_irqs() && isa_irq_to_gsi[gsi] == gsi)
 363                 isa_irq_to_gsi[gsi] = ACPI_INVALID_GSI;
 364         isa_irq_to_gsi[bus_irq] = gsi;
 365 }
 366
 367 static int mp_config_acpi_gsi(struct device *dev, u32 gsi, int trigger,
 368                         int polarity)
 369 {
 370 #ifdef CONFIG_X86_MPPARSE
 371         struct mpc_intsrc mp_irq;
 372         struct pci_dev *pdev;
 373         unsigned char number;
 374         unsigned int devfn;
 375         int ioapic;
 376         u8 pin;
 377
 378         if (!acpi_ioapic)
 379                 return 0;
 380         if (!dev || !dev_is_pci(dev))
 381                 return 0;
 382
 383         pdev = to_pci_dev(dev);
 384         number = pdev->bus->number;
 385         devfn = pdev->devfn;
 386         pin = pdev->pin;
 387         /* print the entry should happen on mptable identically */
 388         mp_irq.type = MP_INTSRC;
 389         mp_irq.irqtype = mp_INT;
 390         mp_irq.irqflag = (trigger == ACPI_EDGE_SENSITIVE ? 4 : 0x0c) |
 391                                 (polarity == ACPI_ACTIVE_HIGH ? 1 : 3);
 392         mp_irq.srcbus = number;
 393         mp_irq.srcbusirq = (((devfn >> 3) & 0x1f) << 2) | ((pin - 1) & 3);
 394         ioapic = mp_find_ioapic(gsi);
 395         mp_irq.dstapic = mpc_ioapic_id(ioapic);
 396         mp_irq.dstirq = mp_find_ioapic_pin(ioapic, gsi);
 397
 398         mp_save_irq(&mp_irq);
 399 #endif
 400         return 0;
 401 }
 402
 403 static int mp_register_gsi(struct device *dev, u32 gsi, int trigger,
 404                            int polarity)
 405 {
 406         int irq, node;
 407
 408         if (acpi_irq_model != ACPI_IRQ_MODEL_IOAPIC)
 409                 return gsi;
 410
 411         trigger = trigger == ACPI_EDGE_SENSITIVE ? 0 : 1;
 412         polarity = polarity == ACPI_ACTIVE_HIGH ? 0 : 1;
 413         node = dev ? dev_to_node(dev) : NUMA_NO_NODE;
 414         if (mp_set_gsi_attr(gsi, trigger, polarity, node)) {
 415                 pr_warn("Failed to set pin attr for GSI%d\n", gsi);
 416                 return -1;
 417         }
 418
 419         irq = mp_map_gsi_to_irq(gsi, IOAPIC_MAP_ALLOC);
 420         if (irq < 0)
 421                 return irq;
 422
 423         /* Don't set up the ACPI SCI because it's already set up */
 424         if (enable_update_mptable && acpi_gbl_FADT.sci_interrupt != gsi)
 425                 mp_config_acpi_gsi(dev, gsi, trigger, polarity);
 426
 427         return irq;
 428 }
 429
 430 static void mp_unregister_gsi(u32 gsi)
 431 {
 432         int irq;
 433
 434         if (acpi_irq_model != ACPI_IRQ_MODEL_IOAPIC)
 435                 return;
 436
 437         irq = mp_map_gsi_to_irq(gsi, 0);
 438         if (irq > 0)
 439                 mp_unmap_irq(irq);
 440 }
 441
 442 static struct irq_domain_ops acpi_irqdomain_ops = {
 443         .map = mp_irqdomain_map,
 444         .unmap = mp_irqdomain_unmap,
 445 };
 446
 447 static int __init
 448 acpi_parse_ioapic(struct acpi_subtable_header * header, const unsigned long end)
 449 {
 450         struct acpi_madt_io_apic *ioapic = NULL;
 451         struct ioapic_domain_cfg cfg = {
 452                 .type = IOAPIC_DOMAIN_DYNAMIC,
 453                 .ops = &acpi_irqdomain_ops,
 454         };
 455
 456         ioapic = (struct acpi_madt_io_apic *)header;
 457
 458         if (BAD_MADT_ENTRY(ioapic, end))
 459                 return -EINVAL;
 460
 461         acpi_table_print_madt_entry(header);
 462
 463         /* Statically assign IRQ numbers for IOAPICs hosting legacy IRQs */
 464         if (ioapic->global_irq_base < nr_legacy_irqs())
 465                 cfg.type = IOAPIC_DOMAIN_LEGACY;
 466
 467         mp_register_ioapic(ioapic->id, ioapic->address, ioapic->global_irq_base,
 468                            &cfg);
 469
 470         return 0;
 471 }
 472
 473 /*
 474  * Parse Interrupt Source Override for the ACPI SCI
 475  */
 476 static void __init acpi_sci_ioapic_setup(u8 bus_irq, u16 polarity, u16 trigger, u32 gsi)
 477 {
 478         if (trigger == 0)       /* compatible SCI trigger is level */
 479                 trigger = 3;
 480
 481         if (polarity == 0)      /* compatible SCI polarity is low */
 482                 polarity = 3;
 483
 484         /* Command-line over-ride via acpi_sci= */
 485         if (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK)
 486                 trigger = (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2;
 487
 488         if (acpi_sci_flags & ACPI_MADT_POLARITY_MASK)
 489                 polarity = acpi_sci_flags & ACPI_MADT_POLARITY_MASK;
 490
 491         mp_override_legacy_irq(bus_irq, polarity, trigger, gsi);
 492
 493         /*
 494          * stash over-ride to indicate we've been here
 495          * and for later update of acpi_gbl_FADT
 496          */
 497         acpi_sci_override_gsi = gsi;
 498         return;
 499 }
 500
 501 static int __init
 502 acpi_parse_int_src_ovr(struct acpi_subtable_header * header,
 503                        const unsigned long end)
 504 {
 505         struct acpi_madt_interrupt_override *intsrc = NULL;
 506
 507         intsrc = (struct acpi_madt_interrupt_override *)header;
 508
 509         if (BAD_MADT_ENTRY(intsrc, end))
 510                 return -EINVAL;
 511
 512         acpi_table_print_madt_entry(header);
 513
 514         if (intsrc->source_irq == acpi_gbl_FADT.sci_interrupt) {
 515                 acpi_sci_ioapic_setup(intsrc->source_irq,
 516                                       intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
 517                                       (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2,
 518                                       intsrc->global_irq);
 519                 return 0;
 520         }
 521
 522         if (intsrc->source_irq == 0) {
 523                 if (acpi_skip_timer_override) {
 524                         printk(PREFIX "BIOS IRQ0 override ignored.\n");
 525                         return 0;
 526                 }
 527
 528                 if ((intsrc->global_irq == 2) && acpi_fix_pin2_polarity
 529                         && (intsrc->inti_flags & ACPI_MADT_POLARITY_MASK)) {
 530                         intsrc->inti_flags &= ~ACPI_MADT_POLARITY_MASK;
 531                         printk(PREFIX "BIOS IRQ0 pin2 override: forcing polarity to high active.\n");
 532                 }
 533         }
 534
 535         mp_override_legacy_irq(intsrc->source_irq,
 536                                 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
 537                                 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2,
 538                                 intsrc->global_irq);
 539
 540         return 0;
 541 }
 542
 543 static int __init
 544 acpi_parse_nmi_src(struct acpi_subtable_header * header, const unsigned long end)
 545 {
 546         struct acpi_madt_nmi_source *nmi_src = NULL;
 547
 548         nmi_src = (struct acpi_madt_nmi_source *)header;
 549
 550         if (BAD_MADT_ENTRY(nmi_src, end))
 551                 return -EINVAL;
 552
 553         acpi_table_print_madt_entry(header);
 554
 555         /* TBD: Support nimsrc entries? */
 556
 557         return 0;
 558 }
 559
 560 #endif                          /* CONFIG_X86_IO_APIC */
 561
 562 /*
 563  * acpi_pic_sci_set_trigger()
 564  *
 565  * use ELCR to set PIC-mode trigger type for SCI
 566  *
 567  * If a PIC-mode SCI is not recognized or gives spurious IRQ7's
 568  * it may require Edge Trigger -- use "acpi_sci=edge"
 569  *
 570  * Port 0x4d0-4d1 are ECLR1 and ECLR2, the Edge/Level Control Registers
 571  * for the 8259 PIC.  bit[n] = 1 means irq[n] is Level, otherwise Edge.
 572  * ECLR1 is IRQs 0-7 (IRQ 0, 1, 2 must be 0)
 573  * ECLR2 is IRQs 8-15 (IRQ 8, 13 must be 0)
 574  */
 575
 576 void __init acpi_pic_sci_set_trigger(unsigned int irq, u16 trigger)
 577 {
 578         unsigned int mask = 1 << irq;
 579         unsigned int old, new;
 580
 581         /* Real old ELCR mask */
 582         old = inb(0x4d0) | (inb(0x4d1) << 8);
 583
 584         /*
 585          * If we use ACPI to set PCI IRQs, then we should clear ELCR
 586          * since we will set it correctly as we enable the PCI irq
 587          * routing.
 588          */
 589         new = acpi_noirq ? old : 0;
 590
 591         /*
 592          * Update SCI information in the ELCR, it isn't in the PCI
 593          * routing tables..
 594          */
 595         switch (trigger) {
 596         case 1:         /* Edge - clear */
 597                 new &= ~mask;
 598                 break;
 599         case 3:         /* Level - set */
 600                 new |= mask;
 601                 break;
 602         }
 603
 604         if (old == new)
 605                 return;
 606
 607         printk(PREFIX "setting ELCR to %04x (from %04x)\n", new, old);
 608         outb(new, 0x4d0);
 609         outb(new >> 8, 0x4d1);
 610 }
 611
 612 int acpi_gsi_to_irq(u32 gsi, unsigned int *irqp)
 613 {
 614         int rc, irq, trigger, polarity;
 615
 616         rc = acpi_get_override_irq(gsi, &trigger, &polarity);
 617         if (rc == 0) {
 618                 trigger = trigger ? ACPI_LEVEL_SENSITIVE : ACPI_EDGE_SENSITIVE;
 619                 polarity = polarity ? ACPI_ACTIVE_LOW : ACPI_ACTIVE_HIGH;
 620                 irq = acpi_register_gsi(NULL, gsi, trigger, polarity);
 621                 if (irq >= 0) {
 622                         *irqp = irq;
 623                         return 0;
 624                 }
 625         }
 626
 627         return -1;
 628 }
 629 EXPORT_SYMBOL_GPL(acpi_gsi_to_irq);
 630
 631 int acpi_isa_irq_to_gsi(unsigned isa_irq, u32 *gsi)
 632 {
 633         if (isa_irq < nr_legacy_irqs() &&
 634             isa_irq_to_gsi[isa_irq] != ACPI_INVALID_GSI) {
 635                 *gsi = isa_irq_to_gsi[isa_irq];
 636                 return 0;
 637         }
 638
 639         return -1;
 640 }
 641
 642 static int acpi_register_gsi_pic(struct device *dev, u32 gsi,
 643                                  int trigger, int polarity)
 644 {
 645 #ifdef CONFIG_PCI
 646         /*
 647          * Make sure all (legacy) PCI IRQs are set as level-triggered.
 648          */
 649         if (trigger == ACPI_LEVEL_SENSITIVE)
 650                 eisa_set_level_irq(gsi);
 651 #endif
 652
 653         return gsi;
 654 }
 655
 656 #ifdef CONFIG_X86_LOCAL_APIC
 657 static int acpi_register_gsi_ioapic(struct device *dev, u32 gsi,
 658                                     int trigger, int polarity)
 659 {
 660         int irq = gsi;
 661
 662 #ifdef CONFIG_X86_IO_APIC
 663         mutex_lock(&acpi_ioapic_lock);
 664         irq = mp_register_gsi(dev, gsi, trigger, polarity);
 665         mutex_unlock(&acpi_ioapic_lock);
 666 #endif
 667
 668         return irq;
 669 }
 670
 671 static void acpi_unregister_gsi_ioapic(u32 gsi)
 672 {
 673 #ifdef CONFIG_X86_IO_APIC
 674         mutex_lock(&acpi_ioapic_lock);
 675         mp_unregister_gsi(gsi);
 676         mutex_unlock(&acpi_ioapic_lock);
 677 #endif
 678 }
 679 #endif
 680
 681 int (*__acpi_register_gsi)(struct device *dev, u32 gsi,
 682                            int trigger, int polarity) = acpi_register_gsi_pic;
 683 void (*__acpi_unregister_gsi)(u32 gsi) = NULL;
 684
 685 #ifdef CONFIG_ACPI_SLEEP
 686 int (*acpi_suspend_lowlevel)(void) = x86_acpi_suspend_lowlevel;
 687 #else
 688 int (*acpi_suspend_lowlevel)(void);
 689 #endif
 690
 691 /*
 692  * success: return IRQ number (>=0)
 693  * failure: return < 0
 694  */
 695 int acpi_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity)
 696 {
 697         return __acpi_register_gsi(dev, gsi, trigger, polarity);
 698 }
 699 EXPORT_SYMBOL_GPL(acpi_register_gsi);
 700
 701 void acpi_unregister_gsi(u32 gsi)
 702 {
 703         if (__acpi_unregister_gsi)
 704                 __acpi_unregister_gsi(gsi);
 705 }
 706 EXPORT_SYMBOL_GPL(acpi_unregister_gsi);
 707
 708 #ifdef CONFIG_X86_LOCAL_APIC
 709 static void __init acpi_set_irq_model_ioapic(void)
 710 {
 711         acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC;
 712         __acpi_register_gsi = acpi_register_gsi_ioapic;
 713         __acpi_unregister_gsi = acpi_unregister_gsi_ioapic;
 714         acpi_ioapic = 1;
 715 }
 716 #endif
 717
 718 /*
 719  *  ACPI based hotplug support for CPU
 720  */
 721 #ifdef CONFIG_ACPI_HOTPLUG_CPU
 722 #include <acpi/processor.h>
 723
 724 static void acpi_map_cpu2node(acpi_handle handle, int cpu, int physid)
 725 {
 726 #ifdef CONFIG_ACPI_NUMA
 727         int nid;
 728
 729         nid = acpi_get_node(handle);
 730         if (nid != -1) {
 731                 set_apicid_to_node(physid, nid);
 732                 numa_set_node(cpu, nid);
 733         }
 734 #endif
 735 }
 736
 737 static int _acpi_map_lsapic(acpi_handle handle, int physid, int *pcpu)
 738 {
 739         int cpu;
 740
 741         cpu = acpi_register_lapic(physid, ACPI_MADT_ENABLED);
 742         if (cpu < 0) {
 743                 pr_info(PREFIX "Unable to map lapic to logical cpu number\n");
 744                 return cpu;
 745         }
 746
 747         acpi_processor_set_pdc(handle);
 748         acpi_map_cpu2node(handle, cpu, physid);
 749
 750         *pcpu = cpu;
 751         return 0;
 752 }
 753
 754 /* wrapper to silence section mismatch warning */
 755 int __ref acpi_map_cpu(acpi_handle handle, int physid, int *pcpu)
 756 {
 757         return _acpi_map_lsapic(handle, physid, pcpu);
 758 }
 759 EXPORT_SYMBOL(acpi_map_cpu);
 760
 761 int acpi_unmap_cpu(int cpu)
 762 {
 763 #ifdef CONFIG_ACPI_NUMA
 764         set_apicid_to_node(per_cpu(x86_cpu_to_apicid, cpu), NUMA_NO_NODE);
 765 #endif
 766
 767         per_cpu(x86_cpu_to_apicid, cpu) = -1;
 768         set_cpu_present(cpu, false);
 769         num_processors--;
 770
 771         return (0);
 772 }
 773 EXPORT_SYMBOL(acpi_unmap_cpu);
 774 #endif                          /* CONFIG_ACPI_HOTPLUG_CPU */
 775
 776 int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base)
 777 {
 778         int ret = -ENOSYS;
 779 #ifdef CONFIG_ACPI_HOTPLUG_IOAPIC
 780         int ioapic_id;
 781         u64 addr;
 782         struct ioapic_domain_cfg cfg = {
 783                 .type = IOAPIC_DOMAIN_DYNAMIC,
 784                 .ops = &acpi_irqdomain_ops,
 785         };
 786
 787         ioapic_id = acpi_get_ioapic_id(handle, gsi_base, &addr);
 788         if (ioapic_id < 0) {
 789                 unsigned long long uid;
 790                 acpi_status status;
 791
 792                 status = acpi_evaluate_integer(handle, METHOD_NAME__UID,
 793                                                NULL, &uid);
 794                 if (ACPI_FAILURE(status)) {
 795                         acpi_handle_warn(handle, "failed to get IOAPIC ID.\n");
 796                         return -EINVAL;
 797                 }
 798                 ioapic_id = (int)uid;
 799         }
 800
 801         mutex_lock(&acpi_ioapic_lock);
 802         ret  = mp_register_ioapic(ioapic_id, phys_addr, gsi_base, &cfg);
 803         mutex_unlock(&acpi_ioapic_lock);
 804 #endif
 805
 806         return ret;
 807 }
 808 EXPORT_SYMBOL(acpi_register_ioapic);
 809
 810 int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base)
 811 {
 812         int ret = -ENOSYS;
 813
 814 #ifdef CONFIG_ACPI_HOTPLUG_IOAPIC
 815         mutex_lock(&acpi_ioapic_lock);
 816         ret  = mp_unregister_ioapic(gsi_base);
 817         mutex_unlock(&acpi_ioapic_lock);
 818 #endif
 819
 820         return ret;
 821 }
 822 EXPORT_SYMBOL(acpi_unregister_ioapic);
 823
 824 /**
 825  * acpi_ioapic_registered - Check whether IOAPIC assoicatied with @gsi_base
 826  *                          has been registered
 827  * @handle:     ACPI handle of the IOAPIC deivce
 828  * @gsi_base:   GSI base associated with the IOAPIC
 829  *
 830  * Assume caller holds some type of lock to serialize acpi_ioapic_registered()
 831  * with acpi_register_ioapic()/acpi_unregister_ioapic().
 832  */
 833 int acpi_ioapic_registered(acpi_handle handle, u32 gsi_base)
 834 {
 835         int ret = 0;
 836
 837 #ifdef CONFIG_ACPI_HOTPLUG_IOAPIC
 838         mutex_lock(&acpi_ioapic_lock);
 839         ret  = mp_ioapic_registered(gsi_base);
 840         mutex_unlock(&acpi_ioapic_lock);
 841 #endif
 842
 843         return ret;
 844 }
 845
 846 static int __init acpi_parse_sbf(struct acpi_table_header *table)
 847 {
 848         struct acpi_table_boot *sb = (struct acpi_table_boot *)table;
 849
 850         sbf_port = sb->cmos_index;      /* Save CMOS port */
 851
 852         return 0;
 853 }
 854
 855 #ifdef CONFIG_HPET_TIMER
 856 #include <asm/hpet.h>
 857
 858 static struct resource *hpet_res __initdata;
 859
 860 static int __init acpi_parse_hpet(struct acpi_table_header *table)
 861 {
 862         struct acpi_table_hpet *hpet_tbl = (struct acpi_table_hpet *)table;
 863
 864         if (hpet_tbl->address.space_id != ACPI_SPACE_MEM) {
 865                 printk(KERN_WARNING PREFIX "HPET timers must be located in "
 866                        "memory.\n");
 867                 return -1;
 868         }
 869
 870         hpet_address = hpet_tbl->address.address;
 871         hpet_blockid = hpet_tbl->sequence;
 872
 873         /*
 874          * Some broken BIOSes advertise HPET at 0x0. We really do not
 875          * want to allocate a resource there.
 876          */
 877         if (!hpet_address) {
 878                 printk(KERN_WARNING PREFIX
 879                        "HPET id: %#x base: %#lx is invalid\n",
 880                        hpet_tbl->id, hpet_address);
 881                 return 0;
 882         }
 883 #ifdef CONFIG_X86_64
 884         /*
 885          * Some even more broken BIOSes advertise HPET at
 886          * 0xfed0000000000000 instead of 0xfed00000. Fix it up and add
 887          * some noise:
 888          */
 889         if (hpet_address == 0xfed0000000000000UL) {
 890                 if (!hpet_force_user) {
 891                         printk(KERN_WARNING PREFIX "HPET id: %#x "
 892                                "base: 0xfed0000000000000 is bogus\n "
 893                                "try hpet=force on the kernel command line to "
 894                                "fix it up to 0xfed00000.\n", hpet_tbl->id);
 895                         hpet_address = 0;
 896                         return 0;
 897                 }
 898                 printk(KERN_WARNING PREFIX
 899                        "HPET id: %#x base: 0xfed0000000000000 fixed up "
 900                        "to 0xfed00000.\n", hpet_tbl->id);
 901                 hpet_address >>= 32;
 902         }
 903 #endif
 904         printk(KERN_INFO PREFIX "HPET id: %#x base: %#lx\n",
 905                hpet_tbl->id, hpet_address);
 906
 907         /*
 908          * Allocate and initialize the HPET firmware resource for adding into
 909          * the resource tree during the lateinit timeframe.
 910          */
 911 #define HPET_RESOURCE_NAME_SIZE 9
 912         hpet_res = alloc_bootmem(sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE);
 913
 914         hpet_res->name = (void *)&hpet_res[1];
 915         hpet_res->flags = IORESOURCE_MEM;
 916         snprintf((char *)hpet_res->name, HPET_RESOURCE_NAME_SIZE, "HPET %u",
 917                  hpet_tbl->sequence);
 918
 919         hpet_res->start = hpet_address;
 920         hpet_res->end = hpet_address + (1 * 1024) - 1;
 921
 922         return 0;
 923 }
 924
 925 /*
 926  * hpet_insert_resource inserts the HPET resources used into the resource
 927  * tree.
 928  */
 929 static __init int hpet_insert_resource(void)
 930 {
 931         if (!hpet_res)
 932                 return 1;
 933
 934         return insert_resource(&iomem_resource, hpet_res);
 935 }
 936
 937 late_initcall(hpet_insert_resource);
 938
 939 #else
 940 #define acpi_parse_hpet NULL
 941 #endif
 942
 943 static int __init acpi_parse_fadt(struct acpi_table_header *table)
 944 {
 945
 946 #ifdef CONFIG_X86_PM_TIMER
 947         /* detect the location of the ACPI PM Timer */
 948         if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID) {
 949                 /* FADT rev. 2 */
 950                 if (acpi_gbl_FADT.xpm_timer_block.space_id !=
 951                     ACPI_ADR_SPACE_SYSTEM_IO)
 952                         return 0;
 953
 954                 pmtmr_ioport = acpi_gbl_FADT.xpm_timer_block.address;
 955                 /*
 956                  * "X" fields are optional extensions to the original V1.0
 957                  * fields, so we must selectively expand V1.0 fields if the
 958                  * corresponding X field is zero.
 959                  */
 960                 if (!pmtmr_ioport)
 961                         pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
 962         } else {
 963                 /* FADT rev. 1 */
 964                 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
 965         }
 966         if (pmtmr_ioport)
 967                 printk(KERN_INFO PREFIX "PM-Timer IO Port: %#x\n",
 968                        pmtmr_ioport);
 969 #endif
 970         return 0;
 971 }
 972
 973 #ifdef  CONFIG_X86_LOCAL_APIC
 974 /*
 975  * Parse LAPIC entries in MADT
 976  * returns 0 on success, < 0 on error
 977  */
 978
 979 static int __init early_acpi_parse_madt_lapic_addr_ovr(void)
 980 {
 981         int count;
 982
 983         if (!cpu_has_apic)
 984                 return -ENODEV;
 985
 986         /*
 987          * Note that the LAPIC address is obtained from the MADT (32-bit value)
 988          * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value).
 989          */
 990
 991         count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
 992                                       acpi_parse_lapic_addr_ovr, 0);
 993         if (count < 0) {
 994                 printk(KERN_ERR PREFIX
 995                        "Error parsing LAPIC address override entry\n");
 996                 return count;
 997         }
 998
 999         register_lapic_address(acpi_lapic_addr);
1000
1001         return count;
1002 }
1003
1004 static int __init acpi_parse_madt_lapic_entries(void)
1005 {
1006         int count;
1007         int x2count = 0;
1008
1009         if (!cpu_has_apic)
1010                 return -ENODEV;
1011
1012         /*
1013          * Note that the LAPIC address is obtained from the MADT (32-bit value)
1014          * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value).
1015          */
1016
1017         count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
1018                                       acpi_parse_lapic_addr_ovr, 0);
1019         if (count < 0) {
1020                 printk(KERN_ERR PREFIX
1021                        "Error parsing LAPIC address override entry\n");
1022                 return count;
1023         }
1024
1025         register_lapic_address(acpi_lapic_addr);
1026
1027         count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC,
1028                                       acpi_parse_sapic, MAX_LOCAL_APIC);
1029
1030         if (!count) {
1031                 x2count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC,
1032                                         acpi_parse_x2apic, MAX_LOCAL_APIC);
1033                 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC,
1034                                         acpi_parse_lapic, MAX_LOCAL_APIC);
1035         }
1036         if (!count && !x2count) {
1037                 printk(KERN_ERR PREFIX "No LAPIC entries present\n");
1038                 /* TBD: Cleanup to allow fallback to MPS */
1039                 return -ENODEV;
1040         } else if (count < 0 || x2count < 0) {
1041                 printk(KERN_ERR PREFIX "Error parsing LAPIC entry\n");
1042                 /* TBD: Cleanup to allow fallback to MPS */
1043                 return count;
1044         }
1045
1046         x2count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC_NMI,
1047                                         acpi_parse_x2apic_nmi, 0);
1048         count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI,
1049                                       acpi_parse_lapic_nmi, 0);
1050         if (count < 0 || x2count < 0) {
1051                 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n");
1052                 /* TBD: Cleanup to allow fallback to MPS */
1053                 return count;
1054         }
1055         return 0;
1056 }
1057 #endif                          /* CONFIG_X86_LOCAL_APIC */
1058
1059 #ifdef  CONFIG_X86_IO_APIC
1060 static void __init mp_config_acpi_legacy_irqs(void)
1061 {
1062         int i;
1063         struct mpc_intsrc mp_irq;
1064
1065 #ifdef CONFIG_EISA
1066         /*
1067          * Fabricate the legacy ISA bus (bus #31).
1068          */
1069         mp_bus_id_to_type[MP_ISA_BUS] = MP_BUS_ISA;
1070 #endif
1071         set_bit(MP_ISA_BUS, mp_bus_not_pci);
1072         pr_debug("Bus #%d is ISA\n", MP_ISA_BUS);
1073
1074         /*
1075          * Use the default configuration for the IRQs 0-15.  Unless
1076          * overridden by (MADT) interrupt source override entries.
1077          */
1078         for (i = 0; i < nr_legacy_irqs(); i++) {
1079                 int ioapic, pin;
1080                 unsigned int dstapic;
1081                 int idx;
1082                 u32 gsi;
1083
1084                 /* Locate the gsi that irq i maps to. */
1085                 if (acpi_isa_irq_to_gsi(i, &gsi))
1086                         continue;
1087
1088                 /*
1089                  * Locate the IOAPIC that manages the ISA IRQ.
1090                  */
1091                 ioapic = mp_find_ioapic(gsi);
1092                 if (ioapic < 0)
1093                         continue;
1094                 pin = mp_find_ioapic_pin(ioapic, gsi);
1095                 dstapic = mpc_ioapic_id(ioapic);
1096
1097                 for (idx = 0; idx < mp_irq_entries; idx++) {
1098                         struct mpc_intsrc *irq = mp_irqs + idx;
1099
1100                         /* Do we already have a mapping for this ISA IRQ? */
1101                         if (irq->srcbus == MP_ISA_BUS && irq->srcbusirq == i)
1102                                 break;
1103
1104                         /* Do we already have a mapping for this IOAPIC pin */
1105                         if (irq->dstapic == dstapic && irq->dstirq == pin)
1106                                 break;
1107                 }
1108
1109                 if (idx != mp_irq_entries) {
1110                         printk(KERN_DEBUG "ACPI: IRQ%d used by override.\n", i);
1111                         continue;       /* IRQ already used */
1112                 }
1113
1114                 mp_irq.type = MP_INTSRC;
1115                 mp_irq.irqflag = 0;     /* Conforming */
1116                 mp_irq.srcbus = MP_ISA_BUS;
1117                 mp_irq.dstapic = dstapic;
1118                 mp_irq.irqtype = mp_INT;
1119                 mp_irq.srcbusirq = i; /* Identity mapped */
1120                 mp_irq.dstirq = pin;
1121
1122                 mp_save_irq(&mp_irq);
1123         }
1124 }
1125
1126 /*
1127  * Parse IOAPIC related entries in MADT
1128  * returns 0 on success, < 0 on error
1129  */
1130 static int __init acpi_parse_madt_ioapic_entries(void)
1131 {
1132         int count;
1133
1134         /*
1135          * ACPI interpreter is required to complete interrupt setup,
1136          * so if it is off, don't enumerate the io-apics with ACPI.
1137          * If MPS is present, it will handle them,
1138          * otherwise the system will stay in PIC mode
1139          */
1140         if (acpi_disabled || acpi_noirq)
1141                 return -ENODEV;
1142
1143         if (!cpu_has_apic)
1144                 return -ENODEV;
1145
1146         /*
1147          * if "noapic" boot option, don't look for IO-APICs
1148          */
1149         if (skip_ioapic_setup) {
1150                 printk(KERN_INFO PREFIX "Skipping IOAPIC probe "
1151                        "due to 'noapic' option.\n");
1152                 return -ENODEV;
1153         }
1154
1155         count = acpi_table_parse_madt(ACPI_MADT_TYPE_IO_APIC, acpi_parse_ioapic,
1156                                       MAX_IO_APICS);
1157         if (!count) {
1158                 printk(KERN_ERR PREFIX "No IOAPIC entries present\n");
1159                 return -ENODEV;
1160         } else if (count < 0) {
1161                 printk(KERN_ERR PREFIX "Error parsing IOAPIC entry\n");
1162                 return count;
1163         }
1164
1165         count = acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE,
1166                                       acpi_parse_int_src_ovr, nr_irqs);
1167         if (count < 0) {
1168                 printk(KERN_ERR PREFIX
1169                        "Error parsing interrupt source overrides entry\n");
1170                 /* TBD: Cleanup to allow fallback to MPS */
1171                 return count;
1172         }
1173
1174         /*
1175          * If BIOS did not supply an INT_SRC_OVR for the SCI
1176          * pretend we got one so we can set the SCI flags.
1177          */
1178         if (!acpi_sci_override_gsi)
1179                 acpi_sci_ioapic_setup(acpi_gbl_FADT.sci_interrupt, 0, 0,
1180                                       acpi_gbl_FADT.sci_interrupt);
1181
1182         /* Fill in identity legacy mappings where no override */
1183         mp_config_acpi_legacy_irqs();
1184
1185         count = acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE,
1186                                       acpi_parse_nmi_src, nr_irqs);
1187         if (count < 0) {
1188                 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n");
1189                 /* TBD: Cleanup to allow fallback to MPS */
1190                 return count;
1191         }
1192
1193         return 0;
1194 }
1195 #else
1196 static inline int acpi_parse_madt_ioapic_entries(void)
1197 {
1198         return -1;
1199 }
1200 #endif  /* !CONFIG_X86_IO_APIC */
1201
1202 static void __init early_acpi_process_madt(void)
1203 {
1204 #ifdef CONFIG_X86_LOCAL_APIC
1205         int error;
1206
1207         if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1208
1209                 /*
1210                  * Parse MADT LAPIC entries
1211                  */
1212                 error = early_acpi_parse_madt_lapic_addr_ovr();
1213                 if (!error) {
1214                         acpi_lapic = 1;
1215                         smp_found_config = 1;
1216                 }
1217                 if (error == -EINVAL) {
1218                         /*
1219                          * Dell Precision Workstation 410, 610 come here.
1220                          */
1221                         printk(KERN_ERR PREFIX
1222                                "Invalid BIOS MADT, disabling ACPI\n");
1223                         disable_acpi();
1224                 }
1225         }
1226 #endif
1227 }
1228
1229 static void __init acpi_process_madt(void)
1230 {
1231 #ifdef CONFIG_X86_LOCAL_APIC
1232         int error;
1233
1234         if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1235
1236                 /*
1237                  * Parse MADT LAPIC entries
1238                  */
1239                 error = acpi_parse_madt_lapic_entries();
1240                 if (!error) {
1241                         acpi_lapic = 1;
1242
1243                         /*
1244                          * Parse MADT IO-APIC entries
1245                          */
1246                         mutex_lock(&acpi_ioapic_lock);
1247                         error = acpi_parse_madt_ioapic_entries();
1248                         mutex_unlock(&acpi_ioapic_lock);
1249                         if (!error) {
1250                                 acpi_set_irq_model_ioapic();
1251
1252                                 smp_found_config = 1;
1253                         }
1254                 }
1255                 if (error == -EINVAL) {
1256                         /*
1257                          * Dell Precision Workstation 410, 610 come here.
1258                          */
1259                         printk(KERN_ERR PREFIX
1260                                "Invalid BIOS MADT, disabling ACPI\n");
1261                         disable_acpi();
1262                 }
1263         } else {
1264                 /*
1265                  * ACPI found no MADT, and so ACPI wants UP PIC mode.
1266                  * In the event an MPS table was found, forget it.
1267                  * Boot with "acpi=off" to use MPS on such a system.
1268                  */
1269                 if (smp_found_config) {
1270                         printk(KERN_WARNING PREFIX
1271                                 "No APIC-table, disabling MPS\n");
1272                         smp_found_config = 0;
1273                 }
1274         }
1275
1276         /*
1277          * ACPI supports both logical (e.g. Hyper-Threading) and physical
1278          * processors, where MPS only supports physical.
1279          */
1280         if (acpi_lapic && acpi_ioapic)
1281                 printk(KERN_INFO "Using ACPI (MADT) for SMP configuration "
1282                        "information\n");
1283         else if (acpi_lapic)
1284                 printk(KERN_INFO "Using ACPI for processor (LAPIC) "
1285                        "configuration information\n");
1286 #endif
1287         return;
1288 }
1289
1290 static int __init disable_acpi_irq(const struct dmi_system_id *d)
1291 {
1292         if (!acpi_force) {
1293                 printk(KERN_NOTICE "%s detected: force use of acpi=noirq\n",
1294                        d->ident);
1295                 acpi_noirq_set();
1296         }
1297         return 0;
1298 }
1299
1300 static int __init disable_acpi_pci(const struct dmi_system_id *d)
1301 {
1302         if (!acpi_force) {
1303                 printk(KERN_NOTICE "%s detected: force use of pci=noacpi\n",
1304                        d->ident);
1305                 acpi_disable_pci();
1306         }
1307         return 0;
1308 }
1309
1310 static int __init dmi_disable_acpi(const struct dmi_system_id *d)
1311 {
1312         if (!acpi_force) {
1313                 printk(KERN_NOTICE "%s detected: acpi off\n", d->ident);
1314                 disable_acpi();
1315         } else {
1316                 printk(KERN_NOTICE
1317                        "Warning: DMI blacklist says broken, but acpi forced\n");
1318         }
1319         return 0;
1320 }
1321
1322 /*
1323  * Force ignoring BIOS IRQ0 override
1324  */
1325 static int __init dmi_ignore_irq0_timer_override(const struct dmi_system_id *d)
1326 {
1327         if (!acpi_skip_timer_override) {
1328                 pr_notice("%s detected: Ignoring BIOS IRQ0 override\n",
1329                         d->ident);
1330                 acpi_skip_timer_override = 1;
1331         }
1332         return 0;
1333 }
1334
1335 /*
1336  * If your system is blacklisted here, but you find that acpi=force
1337  * works for you, please contact linux-acpi@vger.kernel.org
1338  */
1339 static struct dmi_system_id __initdata acpi_dmi_table[] = {
1340         /*
1341          * Boxes that need ACPI disabled
1342          */
1343         {
1344          .callback = dmi_disable_acpi,
1345          .ident = "IBM Thinkpad",
1346          .matches = {
1347                      DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1348                      DMI_MATCH(DMI_BOARD_NAME, "2629H1G"),
1349                      },
1350          },
1351
1352         /*
1353          * Boxes that need ACPI PCI IRQ routing disabled
1354          */
1355         {
1356          .callback = disable_acpi_irq,
1357          .ident = "ASUS A7V",
1358          .matches = {
1359                      DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC"),
1360                      DMI_MATCH(DMI_BOARD_NAME, "<A7V>"),
1361                      /* newer BIOS, Revision 1011, does work */
1362                      DMI_MATCH(DMI_BIOS_VERSION,
1363                                "ASUS A7V ACPI BIOS Revision 1007"),
1364                      },
1365          },
1366         {
1367                 /*
1368                  * Latest BIOS for IBM 600E (1.16) has bad pcinum
1369                  * for LPC bridge, which is needed for the PCI
1370                  * interrupt links to work. DSDT fix is in bug 5966.
1371                  * 2645, 2646 model numbers are shared with 600/600E/600X
1372                  */
1373          .callback = disable_acpi_irq,
1374          .ident = "IBM Thinkpad 600 Series 2645",
1375          .matches = {
1376                      DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1377                      DMI_MATCH(DMI_BOARD_NAME, "2645"),
1378                      },
1379          },
1380         {
1381          .callback = disable_acpi_irq,
1382          .ident = "IBM Thinkpad 600 Series 2646",
1383          .matches = {
1384                      DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1385                      DMI_MATCH(DMI_BOARD_NAME, "2646"),
1386                      },
1387          },
1388         /*
1389          * Boxes that need ACPI PCI IRQ routing and PCI scan disabled
1390          */
1391         {                       /* _BBN 0 bug */
1392          .callback = disable_acpi_pci,
1393          .ident = "ASUS PR-DLS",
1394          .matches = {
1395                      DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1396                      DMI_MATCH(DMI_BOARD_NAME, "PR-DLS"),
1397                      DMI_MATCH(DMI_BIOS_VERSION,
1398                                "ASUS PR-DLS ACPI BIOS Revision 1010"),
1399                      DMI_MATCH(DMI_BIOS_DATE, "03/21/2003")
1400                      },
1401          },
1402         {
1403          .callback = disable_acpi_pci,
1404          .ident = "Acer TravelMate 36x Laptop",
1405          .matches = {
1406                      DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
1407                      DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"),
1408                      },
1409          },
1410         {}
1411 };
1412
1413 /* second table for DMI checks that should run after early-quirks */
1414 static struct dmi_system_id __initdata acpi_dmi_table_late[] = {
1415         /*
1416          * HP laptops which use a DSDT reporting as HP/SB400/10000,
1417          * which includes some code which overrides all temperature
1418          * trip points to 16C if the INTIN2 input of the I/O APIC
1419          * is enabled.  This input is incorrectly designated the
1420          * ISA IRQ 0 via an interrupt source override even though
1421          * it is wired to the output of the master 8259A and INTIN0
1422          * is not connected at all.  Force ignoring BIOS IRQ0
1423          * override in that cases.
1424          */
1425         {
1426          .callback = dmi_ignore_irq0_timer_override,
1427          .ident = "HP nx6115 laptop",
1428          .matches = {
1429                      DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1430                      DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6115"),
1431                      },
1432          },
1433         {
1434          .callback = dmi_ignore_irq0_timer_override,
1435          .ident = "HP NX6125 laptop",
1436          .matches = {
1437                      DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1438                      DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6125"),
1439                      },
1440          },
1441         {
1442          .callback = dmi_ignore_irq0_timer_override,
1443          .ident = "HP NX6325 laptop",
1444          .matches = {
1445                      DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1446                      DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6325"),
1447                      },
1448          },
1449         {
1450          .callback = dmi_ignore_irq0_timer_override,
1451          .ident = "HP 6715b laptop",
1452          .matches = {
1453                      DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1454                      DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq 6715b"),
1455                      },
1456          },
1457         {
1458          .callback = dmi_ignore_irq0_timer_override,
1459          .ident = "FUJITSU SIEMENS",
1460          .matches = {
1461                      DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
1462                      DMI_MATCH(DMI_PRODUCT_NAME, "AMILO PRO V2030"),
1463                      },
1464          },
1465         {}
1466 };
1467
1468 /*
1469  * acpi_boot_table_init() and acpi_boot_init()
1470  *  called from setup_arch(), always.
1471  *      1. checksums all tables
1472  *      2. enumerates lapics
1473  *      3. enumerates io-apics
1474  *
1475  * acpi_table_init() is separate to allow reading SRAT without
1476  * other side effects.
1477  *
1478  * side effects of acpi_boot_init:
1479  *      acpi_lapic = 1 if LAPIC found
1480  *      acpi_ioapic = 1 if IOAPIC found
1481  *      if (acpi_lapic && acpi_ioapic) smp_found_config = 1;
1482  *      if acpi_blacklisted() acpi_disabled = 1;
1483  *      acpi_irq_model=...
1484  *      ...
1485  */
1486
1487 void __init acpi_boot_table_init(void)
1488 {
1489         dmi_check_system(acpi_dmi_table);
1490
1491         /*
1492          * If acpi_disabled, bail out
1493          */
1494         if (acpi_disabled)
1495                 return;
1496
1497         /*
1498          * Initialize the ACPI boot-time table parser.
1499          */
1500         if (acpi_table_init()) {
1501                 disable_acpi();
1502                 return;
1503         }
1504
1505         acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1506
1507         /*
1508          * blacklist may disable ACPI entirely
1509          */
1510         if (acpi_blacklisted()) {
1511                 if (acpi_force) {
1512                         printk(KERN_WARNING PREFIX "acpi=force override\n");
1513                 } else {
1514                         printk(KERN_WARNING PREFIX "Disabling ACPI support\n");
1515                         disable_acpi();
1516                         return;
1517                 }
1518         }
1519 }
1520
1521 int __init early_acpi_boot_init(void)
1522 {
1523         /*
1524          * If acpi_disabled, bail out
1525          */
1526         if (acpi_disabled)
1527                 return 1;
1528
1529         /*
1530          * Process the Multiple APIC Description Table (MADT), if present
1531          */
1532         early_acpi_process_madt();
1533
1534         return 0;
1535 }
1536
1537 int __init acpi_boot_init(void)
1538 {
1539         /* those are executed after early-quirks are executed */
1540         dmi_check_system(acpi_dmi_table_late);
1541
1542         /*
1543          * If acpi_disabled, bail out
1544          */
1545         if (acpi_disabled)
1546                 return 1;
1547
1548         acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1549
1550         /*
1551          * set sci_int and PM timer address
1552          */
1553         acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt);
1554
1555         /*
1556          * Process the Multiple APIC Description Table (MADT), if present
1557          */
1558         acpi_process_madt();
1559
1560         acpi_table_parse(ACPI_SIG_HPET, acpi_parse_hpet);
1561
1562         if (!acpi_noirq)
1563                 x86_init.pci.init = pci_acpi_init;
1564
1565         return 0;
1566 }
1567
1568 static int __init parse_acpi(char *arg)
1569 {
1570         if (!arg)
1571                 return -EINVAL;
1572
1573         /* "acpi=off" disables both ACPI table parsing and interpreter */
1574         if (strcmp(arg, "off") == 0) {
1575                 disable_acpi();
1576         }
1577         /* acpi=force to over-ride black-list */
1578         else if (strcmp(arg, "force") == 0) {
1579                 acpi_force = 1;
1580                 acpi_disabled = 0;
1581         }
1582         /* acpi=strict disables out-of-spec workarounds */
1583         else if (strcmp(arg, "strict") == 0) {
1584                 acpi_strict = 1;
1585         }
1586         /* acpi=rsdt use RSDT instead of XSDT */
1587         else if (strcmp(arg, "rsdt") == 0) {
1588                 acpi_gbl_do_not_use_xsdt = TRUE;
1589         }
1590         /* "acpi=noirq" disables ACPI interrupt routing */
1591         else if (strcmp(arg, "noirq") == 0) {
1592                 acpi_noirq_set();
1593         }
1594         /* "acpi=copy_dsdt" copys DSDT */
1595         else if (strcmp(arg, "copy_dsdt") == 0) {
1596                 acpi_gbl_copy_dsdt_locally = 1;
1597         }
1598         /* "acpi=nocmcff" disables FF mode for corrected errors */
1599         else if (strcmp(arg, "nocmcff") == 0) {
1600                 acpi_disable_cmcff = 1;
1601         } else {
1602                 /* Core will printk when we return error. */
1603                 return -EINVAL;
1604         }
1605         return 0;
1606 }
1607 early_param("acpi", parse_acpi);
1608
1609 /* FIXME: Using pci= for an ACPI parameter is a travesty. */
1610 static int __init parse_pci(char *arg)
1611 {
1612         if (arg && strcmp(arg, "noacpi") == 0)
1613                 acpi_disable_pci();
1614         return 0;
1615 }
1616 early_param("pci", parse_pci);
1617
1618 int __init acpi_mps_check(void)
1619 {
1620 #if defined(CONFIG_X86_LOCAL_APIC) && !defined(CONFIG_X86_MPPARSE)
1621 /* mptable code is not built-in*/
1622         if (acpi_disabled || acpi_noirq) {
1623                 printk(KERN_WARNING "MPS support code is not built-in.\n"
1624                        "Using acpi=off or acpi=noirq or pci=noacpi "
1625                        "may have problem\n");
1626                 return 1;
1627         }
1628 #endif
1629         return 0;
1630 }
1631
1632 #ifdef CONFIG_X86_IO_APIC
1633 static int __init parse_acpi_skip_timer_override(char *arg)
1634 {
1635         acpi_skip_timer_override = 1;
1636         return 0;
1637 }
1638 early_param("acpi_skip_timer_override", parse_acpi_skip_timer_override);
1639
1640 static int __init parse_acpi_use_timer_override(char *arg)
1641 {
1642         acpi_use_timer_override = 1;
1643         return 0;
1644 }
1645 early_param("acpi_use_timer_override", parse_acpi_use_timer_override);
1646 #endif /* CONFIG_X86_IO_APIC */
1647
1648 static int __init setup_acpi_sci(char *s)
1649 {
1650         if (!s)
1651                 return -EINVAL;
1652         if (!strcmp(s, "edge"))
1653                 acpi_sci_flags =  ACPI_MADT_TRIGGER_EDGE |
1654                         (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1655         else if (!strcmp(s, "level"))
1656                 acpi_sci_flags = ACPI_MADT_TRIGGER_LEVEL |
1657                         (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1658         else if (!strcmp(s, "high"))
1659                 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_HIGH |
1660                         (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1661         else if (!strcmp(s, "low"))
1662                 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_LOW |
1663                         (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1664         else
1665                 return -EINVAL;
1666         return 0;
1667 }
1668 early_param("acpi_sci", setup_acpi_sci);
1669
1670 int __acpi_acquire_global_lock(unsigned int *lock)
1671 {
1672         unsigned int old, new, val;
1673         do {
1674                 old = *lock;
1675                 new = (((old & ~0x3) + 2) + ((old >> 1) & 0x1));
1676                 val = cmpxchg(lock, old, new);
1677         } while (unlikely (val != old));
1678         return (new < 3) ? -1 : 0;
1679 }
1680
1681 int __acpi_release_global_lock(unsigned int *lock)
1682 {
1683         unsigned int old, new, val;
1684         do {
1685                 old = *lock;
1686                 new = old & ~0x3;
1687                 val = cmpxchg(lock, old, new);
1688         } while (unlikely (val != old));
1689         return old & 0x1;
1690 }
1691
1692 void __init arch_reserve_mem_area(acpi_physical_address addr, size_t size)
1693 {
1694         e820_add_region(addr, size, E820_ACPI);
1695         update_e820();
1696 }