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 static int acpi_register_gsi_ioapic(struct device *dev, u32 gsi,
 657                                     int trigger, int polarity)
 658 {
 659         int irq = gsi;
 660
 661 #ifdef CONFIG_X86_IO_APIC
 662         mutex_lock(&acpi_ioapic_lock);
 663         irq = mp_register_gsi(dev, gsi, trigger, polarity);
 664         mutex_unlock(&acpi_ioapic_lock);
 665 #endif
 666
 667         return irq;
 668 }
 669
 670 static void acpi_unregister_gsi_ioapic(u32 gsi)
 671 {
 672 #ifdef CONFIG_X86_IO_APIC
 673         mutex_lock(&acpi_ioapic_lock);
 674         mp_unregister_gsi(gsi);
 675         mutex_unlock(&acpi_ioapic_lock);
 676 #endif
 677 }
 678
 679 int (*__acpi_register_gsi)(struct device *dev, u32 gsi,
 680                            int trigger, int polarity) = acpi_register_gsi_pic;
 681 void (*__acpi_unregister_gsi)(u32 gsi) = NULL;
 682
 683 #ifdef CONFIG_ACPI_SLEEP
 684 int (*acpi_suspend_lowlevel)(void) = x86_acpi_suspend_lowlevel;
 685 #else
 686 int (*acpi_suspend_lowlevel)(void);
 687 #endif
 688
 689 /*
 690  * success: return IRQ number (>=0)
 691  * failure: return < 0
 692  */
 693 int acpi_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity)
 694 {
 695         return __acpi_register_gsi(dev, gsi, trigger, polarity);
 696 }
 697 EXPORT_SYMBOL_GPL(acpi_register_gsi);
 698
 699 void acpi_unregister_gsi(u32 gsi)
 700 {
 701         if (__acpi_unregister_gsi)
 702                 __acpi_unregister_gsi(gsi);
 703 }
 704 EXPORT_SYMBOL_GPL(acpi_unregister_gsi);
 705
 706 #ifdef CONFIG_X86_LOCAL_APIC
 707 static void __init acpi_set_irq_model_ioapic(void)
 708 {
 709         acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC;
 710         __acpi_register_gsi = acpi_register_gsi_ioapic;
 711         __acpi_unregister_gsi = acpi_unregister_gsi_ioapic;
 712         acpi_ioapic = 1;
 713 }
 714 #endif
 715
 716 /*
 717  *  ACPI based hotplug support for CPU
 718  */
 719 #ifdef CONFIG_ACPI_HOTPLUG_CPU
 720 #include <acpi/processor.h>
 721
 722 static void acpi_map_cpu2node(acpi_handle handle, int cpu, int physid)
 723 {
 724 #ifdef CONFIG_ACPI_NUMA
 725         int nid;
 726
 727         nid = acpi_get_node(handle);
 728         if (nid != -1) {
 729                 set_apicid_to_node(physid, nid);
 730                 numa_set_node(cpu, nid);
 731         }
 732 #endif
 733 }
 734
 735 static int _acpi_map_lsapic(acpi_handle handle, int physid, int *pcpu)
 736 {
 737         int cpu;
 738
 739         cpu = acpi_register_lapic(physid, ACPI_MADT_ENABLED);
 740         if (cpu < 0) {
 741                 pr_info(PREFIX "Unable to map lapic to logical cpu number\n");
 742                 return cpu;
 743         }
 744
 745         acpi_processor_set_pdc(handle);
 746         acpi_map_cpu2node(handle, cpu, physid);
 747
 748         *pcpu = cpu;
 749         return 0;
 750 }
 751
 752 /* wrapper to silence section mismatch warning */
 753 int __ref acpi_map_cpu(acpi_handle handle, int physid, int *pcpu)
 754 {
 755         return _acpi_map_lsapic(handle, physid, pcpu);
 756 }
 757 EXPORT_SYMBOL(acpi_map_cpu);
 758
 759 int acpi_unmap_cpu(int cpu)
 760 {
 761 #ifdef CONFIG_ACPI_NUMA
 762         set_apicid_to_node(per_cpu(x86_cpu_to_apicid, cpu), NUMA_NO_NODE);
 763 #endif
 764
 765         per_cpu(x86_cpu_to_apicid, cpu) = -1;
 766         set_cpu_present(cpu, false);
 767         num_processors--;
 768
 769         return (0);
 770 }
 771 EXPORT_SYMBOL(acpi_unmap_cpu);
 772 #endif                          /* CONFIG_ACPI_HOTPLUG_CPU */
 773
 774 int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base)
 775 {
 776         int ret = -ENOSYS;
 777 #ifdef CONFIG_ACPI_HOTPLUG_IOAPIC
 778         int ioapic_id;
 779         u64 addr;
 780         struct ioapic_domain_cfg cfg = {
 781                 .type = IOAPIC_DOMAIN_DYNAMIC,
 782                 .ops = &acpi_irqdomain_ops,
 783         };
 784
 785         ioapic_id = acpi_get_ioapic_id(handle, gsi_base, &addr);
 786         if (ioapic_id < 0) {
 787                 unsigned long long uid;
 788                 acpi_status status;
 789
 790                 status = acpi_evaluate_integer(handle, METHOD_NAME__UID,
 791                                                NULL, &uid);
 792                 if (ACPI_FAILURE(status)) {
 793                         acpi_handle_warn(handle, "failed to get IOAPIC ID.\n");
 794                         return -EINVAL;
 795                 }
 796                 ioapic_id = (int)uid;
 797         }
 798
 799         mutex_lock(&acpi_ioapic_lock);
 800         ret  = mp_register_ioapic(ioapic_id, phys_addr, gsi_base, &cfg);
 801         mutex_unlock(&acpi_ioapic_lock);
 802 #endif
 803
 804         return ret;
 805 }
 806 EXPORT_SYMBOL(acpi_register_ioapic);
 807
 808 int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base)
 809 {
 810         int ret = -ENOSYS;
 811
 812 #ifdef CONFIG_ACPI_HOTPLUG_IOAPIC
 813         mutex_lock(&acpi_ioapic_lock);
 814         ret  = mp_unregister_ioapic(gsi_base);
 815         mutex_unlock(&acpi_ioapic_lock);
 816 #endif
 817
 818         return ret;
 819 }
 820 EXPORT_SYMBOL(acpi_unregister_ioapic);
 821
 822 /**
 823  * acpi_ioapic_registered - Check whether IOAPIC assoicatied with @gsi_base
 824  *                          has been registered
 825  * @handle:     ACPI handle of the IOAPIC deivce
 826  * @gsi_base:   GSI base associated with the IOAPIC
 827  *
 828  * Assume caller holds some type of lock to serialize acpi_ioapic_registered()
 829  * with acpi_register_ioapic()/acpi_unregister_ioapic().
 830  */
 831 int acpi_ioapic_registered(acpi_handle handle, u32 gsi_base)
 832 {
 833         int ret = 0;
 834
 835 #ifdef CONFIG_ACPI_HOTPLUG_IOAPIC
 836         mutex_lock(&acpi_ioapic_lock);
 837         ret  = mp_ioapic_registered(gsi_base);
 838         mutex_unlock(&acpi_ioapic_lock);
 839 #endif
 840
 841         return ret;
 842 }
 843
 844 static int __init acpi_parse_sbf(struct acpi_table_header *table)
 845 {
 846         struct acpi_table_boot *sb;
 847
 848         sb = (struct acpi_table_boot *)table;
 849         if (!sb) {
 850                 printk(KERN_WARNING PREFIX "Unable to map SBF\n");
 851                 return -ENODEV;
 852         }
 853
 854         sbf_port = sb->cmos_index;      /* Save CMOS port */
 855
 856         return 0;
 857 }
 858
 859 #ifdef CONFIG_HPET_TIMER
 860 #include <asm/hpet.h>
 861
 862 static struct resource *hpet_res __initdata;
 863
 864 static int __init acpi_parse_hpet(struct acpi_table_header *table)
 865 {
 866         struct acpi_table_hpet *hpet_tbl;
 867
 868         hpet_tbl = (struct acpi_table_hpet *)table;
 869         if (!hpet_tbl) {
 870                 printk(KERN_WARNING PREFIX "Unable to map HPET\n");
 871                 return -ENODEV;
 872         }
 873
 874         if (hpet_tbl->address.space_id != ACPI_SPACE_MEM) {
 875                 printk(KERN_WARNING PREFIX "HPET timers must be located in "
 876                        "memory.\n");
 877                 return -1;
 878         }
 879
 880         hpet_address = hpet_tbl->address.address;
 881         hpet_blockid = hpet_tbl->sequence;
 882
 883         /*
 884          * Some broken BIOSes advertise HPET at 0x0. We really do not
 885          * want to allocate a resource there.
 886          */
 887         if (!hpet_address) {
 888                 printk(KERN_WARNING PREFIX
 889                        "HPET id: %#x base: %#lx is invalid\n",
 890                        hpet_tbl->id, hpet_address);
 891                 return 0;
 892         }
 893 #ifdef CONFIG_X86_64
 894         /*
 895          * Some even more broken BIOSes advertise HPET at
 896          * 0xfed0000000000000 instead of 0xfed00000. Fix it up and add
 897          * some noise:
 898          */
 899         if (hpet_address == 0xfed0000000000000UL) {
 900                 if (!hpet_force_user) {
 901                         printk(KERN_WARNING PREFIX "HPET id: %#x "
 902                                "base: 0xfed0000000000000 is bogus\n "
 903                                "try hpet=force on the kernel command line to "
 904                                "fix it up to 0xfed00000.\n", hpet_tbl->id);
 905                         hpet_address = 0;
 906                         return 0;
 907                 }
 908                 printk(KERN_WARNING PREFIX
 909                        "HPET id: %#x base: 0xfed0000000000000 fixed up "
 910                        "to 0xfed00000.\n", hpet_tbl->id);
 911                 hpet_address >>= 32;
 912         }
 913 #endif
 914         printk(KERN_INFO PREFIX "HPET id: %#x base: %#lx\n",
 915                hpet_tbl->id, hpet_address);
 916
 917         /*
 918          * Allocate and initialize the HPET firmware resource for adding into
 919          * the resource tree during the lateinit timeframe.
 920          */
 921 #define HPET_RESOURCE_NAME_SIZE 9
 922         hpet_res = alloc_bootmem(sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE);
 923
 924         hpet_res->name = (void *)&hpet_res[1];
 925         hpet_res->flags = IORESOURCE_MEM;
 926         snprintf((char *)hpet_res->name, HPET_RESOURCE_NAME_SIZE, "HPET %u",
 927                  hpet_tbl->sequence);
 928
 929         hpet_res->start = hpet_address;
 930         hpet_res->end = hpet_address + (1 * 1024) - 1;
 931
 932         return 0;
 933 }
 934
 935 /*
 936  * hpet_insert_resource inserts the HPET resources used into the resource
 937  * tree.
 938  */
 939 static __init int hpet_insert_resource(void)
 940 {
 941         if (!hpet_res)
 942                 return 1;
 943
 944         return insert_resource(&iomem_resource, hpet_res);
 945 }
 946
 947 late_initcall(hpet_insert_resource);
 948
 949 #else
 950 #define acpi_parse_hpet NULL
 951 #endif
 952
 953 static int __init acpi_parse_fadt(struct acpi_table_header *table)
 954 {
 955
 956 #ifdef CONFIG_X86_PM_TIMER
 957         /* detect the location of the ACPI PM Timer */
 958         if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID) {
 959                 /* FADT rev. 2 */
 960                 if (acpi_gbl_FADT.xpm_timer_block.space_id !=
 961                     ACPI_ADR_SPACE_SYSTEM_IO)
 962                         return 0;
 963
 964                 pmtmr_ioport = acpi_gbl_FADT.xpm_timer_block.address;
 965                 /*
 966                  * "X" fields are optional extensions to the original V1.0
 967                  * fields, so we must selectively expand V1.0 fields if the
 968                  * corresponding X field is zero.
 969                  */
 970                 if (!pmtmr_ioport)
 971                         pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
 972         } else {
 973                 /* FADT rev. 1 */
 974                 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
 975         }
 976         if (pmtmr_ioport)
 977                 printk(KERN_INFO PREFIX "PM-Timer IO Port: %#x\n",
 978                        pmtmr_ioport);
 979 #endif
 980         return 0;
 981 }
 982
 983 #ifdef  CONFIG_X86_LOCAL_APIC
 984 /*
 985  * Parse LAPIC entries in MADT
 986  * returns 0 on success, < 0 on error
 987  */
 988
 989 static int __init early_acpi_parse_madt_lapic_addr_ovr(void)
 990 {
 991         int count;
 992
 993         if (!cpu_has_apic)
 994                 return -ENODEV;
 995
 996         /*
 997          * Note that the LAPIC address is obtained from the MADT (32-bit value)
 998          * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value).
 999          */
1000
1001         count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
1002                                       acpi_parse_lapic_addr_ovr, 0);
1003         if (count < 0) {
1004                 printk(KERN_ERR PREFIX
1005                        "Error parsing LAPIC address override entry\n");
1006                 return count;
1007         }
1008
1009         register_lapic_address(acpi_lapic_addr);
1010
1011         return count;
1012 }
1013
1014 static int __init acpi_parse_madt_lapic_entries(void)
1015 {
1016         int count;
1017         int x2count = 0;
1018
1019         if (!cpu_has_apic)
1020                 return -ENODEV;
1021
1022         /*
1023          * Note that the LAPIC address is obtained from the MADT (32-bit value)
1024          * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value).
1025          */
1026
1027         count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
1028                                       acpi_parse_lapic_addr_ovr, 0);
1029         if (count < 0) {
1030                 printk(KERN_ERR PREFIX
1031                        "Error parsing LAPIC address override entry\n");
1032                 return count;
1033         }
1034
1035         register_lapic_address(acpi_lapic_addr);
1036
1037         count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC,
1038                                       acpi_parse_sapic, MAX_LOCAL_APIC);
1039
1040         if (!count) {
1041                 x2count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC,
1042                                         acpi_parse_x2apic, MAX_LOCAL_APIC);
1043                 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC,
1044                                         acpi_parse_lapic, MAX_LOCAL_APIC);
1045         }
1046         if (!count && !x2count) {
1047                 printk(KERN_ERR PREFIX "No LAPIC entries present\n");
1048                 /* TBD: Cleanup to allow fallback to MPS */
1049                 return -ENODEV;
1050         } else if (count < 0 || x2count < 0) {
1051                 printk(KERN_ERR PREFIX "Error parsing LAPIC entry\n");
1052                 /* TBD: Cleanup to allow fallback to MPS */
1053                 return count;
1054         }
1055
1056         x2count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC_NMI,
1057                                         acpi_parse_x2apic_nmi, 0);
1058         count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI,
1059                                       acpi_parse_lapic_nmi, 0);
1060         if (count < 0 || x2count < 0) {
1061                 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n");
1062                 /* TBD: Cleanup to allow fallback to MPS */
1063                 return count;
1064         }
1065         return 0;
1066 }
1067 #endif                          /* CONFIG_X86_LOCAL_APIC */
1068
1069 #ifdef  CONFIG_X86_IO_APIC
1070 static void __init mp_config_acpi_legacy_irqs(void)
1071 {
1072         int i;
1073         struct mpc_intsrc mp_irq;
1074
1075 #ifdef CONFIG_EISA
1076         /*
1077          * Fabricate the legacy ISA bus (bus #31).
1078          */
1079         mp_bus_id_to_type[MP_ISA_BUS] = MP_BUS_ISA;
1080 #endif
1081         set_bit(MP_ISA_BUS, mp_bus_not_pci);
1082         pr_debug("Bus #%d is ISA\n", MP_ISA_BUS);
1083
1084         /*
1085          * Use the default configuration for the IRQs 0-15.  Unless
1086          * overridden by (MADT) interrupt source override entries.
1087          */
1088         for (i = 0; i < nr_legacy_irqs(); i++) {
1089                 int ioapic, pin;
1090                 unsigned int dstapic;
1091                 int idx;
1092                 u32 gsi;
1093
1094                 /* Locate the gsi that irq i maps to. */
1095                 if (acpi_isa_irq_to_gsi(i, &gsi))
1096                         continue;
1097
1098                 /*
1099                  * Locate the IOAPIC that manages the ISA IRQ.
1100                  */
1101                 ioapic = mp_find_ioapic(gsi);
1102                 if (ioapic < 0)
1103                         continue;
1104                 pin = mp_find_ioapic_pin(ioapic, gsi);
1105                 dstapic = mpc_ioapic_id(ioapic);
1106
1107                 for (idx = 0; idx < mp_irq_entries; idx++) {
1108                         struct mpc_intsrc *irq = mp_irqs + idx;
1109
1110                         /* Do we already have a mapping for this ISA IRQ? */
1111                         if (irq->srcbus == MP_ISA_BUS && irq->srcbusirq == i)
1112                                 break;
1113
1114                         /* Do we already have a mapping for this IOAPIC pin */
1115                         if (irq->dstapic == dstapic && irq->dstirq == pin)
1116                                 break;
1117                 }
1118
1119                 if (idx != mp_irq_entries) {
1120                         printk(KERN_DEBUG "ACPI: IRQ%d used by override.\n", i);
1121                         continue;       /* IRQ already used */
1122                 }
1123
1124                 mp_irq.type = MP_INTSRC;
1125                 mp_irq.irqflag = 0;     /* Conforming */
1126                 mp_irq.srcbus = MP_ISA_BUS;
1127                 mp_irq.dstapic = dstapic;
1128                 mp_irq.irqtype = mp_INT;
1129                 mp_irq.srcbusirq = i; /* Identity mapped */
1130                 mp_irq.dstirq = pin;
1131
1132                 mp_save_irq(&mp_irq);
1133         }
1134 }
1135
1136 /*
1137  * Parse IOAPIC related entries in MADT
1138  * returns 0 on success, < 0 on error
1139  */
1140 static int __init acpi_parse_madt_ioapic_entries(void)
1141 {
1142         int count;
1143
1144         /*
1145          * ACPI interpreter is required to complete interrupt setup,
1146          * so if it is off, don't enumerate the io-apics with ACPI.
1147          * If MPS is present, it will handle them,
1148          * otherwise the system will stay in PIC mode
1149          */
1150         if (acpi_disabled || acpi_noirq)
1151                 return -ENODEV;
1152
1153         if (!cpu_has_apic)
1154                 return -ENODEV;
1155
1156         /*
1157          * if "noapic" boot option, don't look for IO-APICs
1158          */
1159         if (skip_ioapic_setup) {
1160                 printk(KERN_INFO PREFIX "Skipping IOAPIC probe "
1161                        "due to 'noapic' option.\n");
1162                 return -ENODEV;
1163         }
1164
1165         count = acpi_table_parse_madt(ACPI_MADT_TYPE_IO_APIC, acpi_parse_ioapic,
1166                                       MAX_IO_APICS);
1167         if (!count) {
1168                 printk(KERN_ERR PREFIX "No IOAPIC entries present\n");
1169                 return -ENODEV;
1170         } else if (count < 0) {
1171                 printk(KERN_ERR PREFIX "Error parsing IOAPIC entry\n");
1172                 return count;
1173         }
1174
1175         count = acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE,
1176                                       acpi_parse_int_src_ovr, nr_irqs);
1177         if (count < 0) {
1178                 printk(KERN_ERR PREFIX
1179                        "Error parsing interrupt source overrides entry\n");
1180                 /* TBD: Cleanup to allow fallback to MPS */
1181                 return count;
1182         }
1183
1184         /*
1185          * If BIOS did not supply an INT_SRC_OVR for the SCI
1186          * pretend we got one so we can set the SCI flags.
1187          */
1188         if (!acpi_sci_override_gsi)
1189                 acpi_sci_ioapic_setup(acpi_gbl_FADT.sci_interrupt, 0, 0,
1190                                       acpi_gbl_FADT.sci_interrupt);
1191
1192         /* Fill in identity legacy mappings where no override */
1193         mp_config_acpi_legacy_irqs();
1194
1195         count = acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE,
1196                                       acpi_parse_nmi_src, nr_irqs);
1197         if (count < 0) {
1198                 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n");
1199                 /* TBD: Cleanup to allow fallback to MPS */
1200                 return count;
1201         }
1202
1203         return 0;
1204 }
1205 #else
1206 static inline int acpi_parse_madt_ioapic_entries(void)
1207 {
1208         return -1;
1209 }
1210 #endif  /* !CONFIG_X86_IO_APIC */
1211
1212 static void __init early_acpi_process_madt(void)
1213 {
1214 #ifdef CONFIG_X86_LOCAL_APIC
1215         int error;
1216
1217         if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1218
1219                 /*
1220                  * Parse MADT LAPIC entries
1221                  */
1222                 error = early_acpi_parse_madt_lapic_addr_ovr();
1223                 if (!error) {
1224                         acpi_lapic = 1;
1225                         smp_found_config = 1;
1226                 }
1227                 if (error == -EINVAL) {
1228                         /*
1229                          * Dell Precision Workstation 410, 610 come here.
1230                          */
1231                         printk(KERN_ERR PREFIX
1232                                "Invalid BIOS MADT, disabling ACPI\n");
1233                         disable_acpi();
1234                 }
1235         }
1236 #endif
1237 }
1238
1239 static void __init acpi_process_madt(void)
1240 {
1241 #ifdef CONFIG_X86_LOCAL_APIC
1242         int error;
1243
1244         if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1245
1246                 /*
1247                  * Parse MADT LAPIC entries
1248                  */
1249                 error = acpi_parse_madt_lapic_entries();
1250                 if (!error) {
1251                         acpi_lapic = 1;
1252
1253                         /*
1254                          * Parse MADT IO-APIC entries
1255                          */
1256                         mutex_lock(&acpi_ioapic_lock);
1257                         error = acpi_parse_madt_ioapic_entries();
1258                         mutex_unlock(&acpi_ioapic_lock);
1259                         if (!error) {
1260                                 acpi_set_irq_model_ioapic();
1261
1262                                 smp_found_config = 1;
1263                         }
1264                 }
1265                 if (error == -EINVAL) {
1266                         /*
1267                          * Dell Precision Workstation 410, 610 come here.
1268                          */
1269                         printk(KERN_ERR PREFIX
1270                                "Invalid BIOS MADT, disabling ACPI\n");
1271                         disable_acpi();
1272                 }
1273         } else {
1274                 /*
1275                  * ACPI found no MADT, and so ACPI wants UP PIC mode.
1276                  * In the event an MPS table was found, forget it.
1277                  * Boot with "acpi=off" to use MPS on such a system.
1278                  */
1279                 if (smp_found_config) {
1280                         printk(KERN_WARNING PREFIX
1281                                 "No APIC-table, disabling MPS\n");
1282                         smp_found_config = 0;
1283                 }
1284         }
1285
1286         /*
1287          * ACPI supports both logical (e.g. Hyper-Threading) and physical
1288          * processors, where MPS only supports physical.
1289          */
1290         if (acpi_lapic && acpi_ioapic)
1291                 printk(KERN_INFO "Using ACPI (MADT) for SMP configuration "
1292                        "information\n");
1293         else if (acpi_lapic)
1294                 printk(KERN_INFO "Using ACPI for processor (LAPIC) "
1295                        "configuration information\n");
1296 #endif
1297         return;
1298 }
1299
1300 static int __init disable_acpi_irq(const struct dmi_system_id *d)
1301 {
1302         if (!acpi_force) {
1303                 printk(KERN_NOTICE "%s detected: force use of acpi=noirq\n",
1304                        d->ident);
1305                 acpi_noirq_set();
1306         }
1307         return 0;
1308 }
1309
1310 static int __init disable_acpi_pci(const struct dmi_system_id *d)
1311 {
1312         if (!acpi_force) {
1313                 printk(KERN_NOTICE "%s detected: force use of pci=noacpi\n",
1314                        d->ident);
1315                 acpi_disable_pci();
1316         }
1317         return 0;
1318 }
1319
1320 static int __init dmi_disable_acpi(const struct dmi_system_id *d)
1321 {
1322         if (!acpi_force) {
1323                 printk(KERN_NOTICE "%s detected: acpi off\n", d->ident);
1324                 disable_acpi();
1325         } else {
1326                 printk(KERN_NOTICE
1327                        "Warning: DMI blacklist says broken, but acpi forced\n");
1328         }
1329         return 0;
1330 }
1331
1332 /*
1333  * Force ignoring BIOS IRQ0 override
1334  */
1335 static int __init dmi_ignore_irq0_timer_override(const struct dmi_system_id *d)
1336 {
1337         if (!acpi_skip_timer_override) {
1338                 pr_notice("%s detected: Ignoring BIOS IRQ0 override\n",
1339                         d->ident);
1340                 acpi_skip_timer_override = 1;
1341         }
1342         return 0;
1343 }
1344
1345 /*
1346  * If your system is blacklisted here, but you find that acpi=force
1347  * works for you, please contact linux-acpi@vger.kernel.org
1348  */
1349 static struct dmi_system_id __initdata acpi_dmi_table[] = {
1350         /*
1351          * Boxes that need ACPI disabled
1352          */
1353         {
1354          .callback = dmi_disable_acpi,
1355          .ident = "IBM Thinkpad",
1356          .matches = {
1357                      DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1358                      DMI_MATCH(DMI_BOARD_NAME, "2629H1G"),
1359                      },
1360          },
1361
1362         /*
1363          * Boxes that need ACPI PCI IRQ routing disabled
1364          */
1365         {
1366          .callback = disable_acpi_irq,
1367          .ident = "ASUS A7V",
1368          .matches = {
1369                      DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC"),
1370                      DMI_MATCH(DMI_BOARD_NAME, "<A7V>"),
1371                      /* newer BIOS, Revision 1011, does work */
1372                      DMI_MATCH(DMI_BIOS_VERSION,
1373                                "ASUS A7V ACPI BIOS Revision 1007"),
1374                      },
1375          },
1376         {
1377                 /*
1378                  * Latest BIOS for IBM 600E (1.16) has bad pcinum
1379                  * for LPC bridge, which is needed for the PCI
1380                  * interrupt links to work. DSDT fix is in bug 5966.
1381                  * 2645, 2646 model numbers are shared with 600/600E/600X
1382                  */
1383          .callback = disable_acpi_irq,
1384          .ident = "IBM Thinkpad 600 Series 2645",
1385          .matches = {
1386                      DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1387                      DMI_MATCH(DMI_BOARD_NAME, "2645"),
1388                      },
1389          },
1390         {
1391          .callback = disable_acpi_irq,
1392          .ident = "IBM Thinkpad 600 Series 2646",
1393          .matches = {
1394                      DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1395                      DMI_MATCH(DMI_BOARD_NAME, "2646"),
1396                      },
1397          },
1398         /*
1399          * Boxes that need ACPI PCI IRQ routing and PCI scan disabled
1400          */
1401         {                       /* _BBN 0 bug */
1402          .callback = disable_acpi_pci,
1403          .ident = "ASUS PR-DLS",
1404          .matches = {
1405                      DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1406                      DMI_MATCH(DMI_BOARD_NAME, "PR-DLS"),
1407                      DMI_MATCH(DMI_BIOS_VERSION,
1408                                "ASUS PR-DLS ACPI BIOS Revision 1010"),
1409                      DMI_MATCH(DMI_BIOS_DATE, "03/21/2003")
1410                      },
1411          },
1412         {
1413          .callback = disable_acpi_pci,
1414          .ident = "Acer TravelMate 36x Laptop",
1415          .matches = {
1416                      DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
1417                      DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"),
1418                      },
1419          },
1420         {}
1421 };
1422
1423 /* second table for DMI checks that should run after early-quirks */
1424 static struct dmi_system_id __initdata acpi_dmi_table_late[] = {
1425         /*
1426          * HP laptops which use a DSDT reporting as HP/SB400/10000,
1427          * which includes some code which overrides all temperature
1428          * trip points to 16C if the INTIN2 input of the I/O APIC
1429          * is enabled.  This input is incorrectly designated the
1430          * ISA IRQ 0 via an interrupt source override even though
1431          * it is wired to the output of the master 8259A and INTIN0
1432          * is not connected at all.  Force ignoring BIOS IRQ0
1433          * override in that cases.
1434          */
1435         {
1436          .callback = dmi_ignore_irq0_timer_override,
1437          .ident = "HP nx6115 laptop",
1438          .matches = {
1439                      DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1440                      DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6115"),
1441                      },
1442          },
1443         {
1444          .callback = dmi_ignore_irq0_timer_override,
1445          .ident = "HP NX6125 laptop",
1446          .matches = {
1447                      DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1448                      DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6125"),
1449                      },
1450          },
1451         {
1452          .callback = dmi_ignore_irq0_timer_override,
1453          .ident = "HP NX6325 laptop",
1454          .matches = {
1455                      DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1456                      DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6325"),
1457                      },
1458          },
1459         {
1460          .callback = dmi_ignore_irq0_timer_override,
1461          .ident = "HP 6715b laptop",
1462          .matches = {
1463                      DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1464                      DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq 6715b"),
1465                      },
1466          },
1467         {
1468          .callback = dmi_ignore_irq0_timer_override,
1469          .ident = "FUJITSU SIEMENS",
1470          .matches = {
1471                      DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
1472                      DMI_MATCH(DMI_PRODUCT_NAME, "AMILO PRO V2030"),
1473                      },
1474          },
1475         {}
1476 };
1477
1478 /*
1479  * acpi_boot_table_init() and acpi_boot_init()
1480  *  called from setup_arch(), always.
1481  *      1. checksums all tables
1482  *      2. enumerates lapics
1483  *      3. enumerates io-apics
1484  *
1485  * acpi_table_init() is separate to allow reading SRAT without
1486  * other side effects.
1487  *
1488  * side effects of acpi_boot_init:
1489  *      acpi_lapic = 1 if LAPIC found
1490  *      acpi_ioapic = 1 if IOAPIC found
1491  *      if (acpi_lapic && acpi_ioapic) smp_found_config = 1;
1492  *      if acpi_blacklisted() acpi_disabled = 1;
1493  *      acpi_irq_model=...
1494  *      ...
1495  */
1496
1497 void __init acpi_boot_table_init(void)
1498 {
1499         dmi_check_system(acpi_dmi_table);
1500
1501         /*
1502          * If acpi_disabled, bail out
1503          */
1504         if (acpi_disabled)
1505                 return;
1506
1507         /*
1508          * Initialize the ACPI boot-time table parser.
1509          */
1510         if (acpi_table_init()) {
1511                 disable_acpi();
1512                 return;
1513         }
1514
1515         acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1516
1517         /*
1518          * blacklist may disable ACPI entirely
1519          */
1520         if (acpi_blacklisted()) {
1521                 if (acpi_force) {
1522                         printk(KERN_WARNING PREFIX "acpi=force override\n");
1523                 } else {
1524                         printk(KERN_WARNING PREFIX "Disabling ACPI support\n");
1525                         disable_acpi();
1526                         return;
1527                 }
1528         }
1529 }
1530
1531 int __init early_acpi_boot_init(void)
1532 {
1533         /*
1534          * If acpi_disabled, bail out
1535          */
1536         if (acpi_disabled)
1537                 return 1;
1538
1539         /*
1540          * Process the Multiple APIC Description Table (MADT), if present
1541          */
1542         early_acpi_process_madt();
1543
1544         return 0;
1545 }
1546
1547 int __init acpi_boot_init(void)
1548 {
1549         /* those are executed after early-quirks are executed */
1550         dmi_check_system(acpi_dmi_table_late);
1551
1552         /*
1553          * If acpi_disabled, bail out
1554          */
1555         if (acpi_disabled)
1556                 return 1;
1557
1558         acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1559
1560         /*
1561          * set sci_int and PM timer address
1562          */
1563         acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt);
1564
1565         /*
1566          * Process the Multiple APIC Description Table (MADT), if present
1567          */
1568         acpi_process_madt();
1569
1570         acpi_table_parse(ACPI_SIG_HPET, acpi_parse_hpet);
1571
1572         if (!acpi_noirq)
1573                 x86_init.pci.init = pci_acpi_init;
1574
1575         return 0;
1576 }
1577
1578 static int __init parse_acpi(char *arg)
1579 {
1580         if (!arg)
1581                 return -EINVAL;
1582
1583         /* "acpi=off" disables both ACPI table parsing and interpreter */
1584         if (strcmp(arg, "off") == 0) {
1585                 disable_acpi();
1586         }
1587         /* acpi=force to over-ride black-list */
1588         else if (strcmp(arg, "force") == 0) {
1589                 acpi_force = 1;
1590                 acpi_disabled = 0;
1591         }
1592         /* acpi=strict disables out-of-spec workarounds */
1593         else if (strcmp(arg, "strict") == 0) {
1594                 acpi_strict = 1;
1595         }
1596         /* acpi=rsdt use RSDT instead of XSDT */
1597         else if (strcmp(arg, "rsdt") == 0) {
1598                 acpi_gbl_do_not_use_xsdt = TRUE;
1599         }
1600         /* "acpi=noirq" disables ACPI interrupt routing */
1601         else if (strcmp(arg, "noirq") == 0) {
1602                 acpi_noirq_set();
1603         }
1604         /* "acpi=copy_dsdt" copys DSDT */
1605         else if (strcmp(arg, "copy_dsdt") == 0) {
1606                 acpi_gbl_copy_dsdt_locally = 1;
1607         }
1608         /* "acpi=nocmcff" disables FF mode for corrected errors */
1609         else if (strcmp(arg, "nocmcff") == 0) {
1610                 acpi_disable_cmcff = 1;
1611         } else {
1612                 /* Core will printk when we return error. */
1613                 return -EINVAL;
1614         }
1615         return 0;
1616 }
1617 early_param("acpi", parse_acpi);
1618
1619 /* FIXME: Using pci= for an ACPI parameter is a travesty. */
1620 static int __init parse_pci(char *arg)
1621 {
1622         if (arg && strcmp(arg, "noacpi") == 0)
1623                 acpi_disable_pci();
1624         return 0;
1625 }
1626 early_param("pci", parse_pci);
1627
1628 int __init acpi_mps_check(void)
1629 {
1630 #if defined(CONFIG_X86_LOCAL_APIC) && !defined(CONFIG_X86_MPPARSE)
1631 /* mptable code is not built-in*/
1632         if (acpi_disabled || acpi_noirq) {
1633                 printk(KERN_WARNING "MPS support code is not built-in.\n"
1634                        "Using acpi=off or acpi=noirq or pci=noacpi "
1635                        "may have problem\n");
1636                 return 1;
1637         }
1638 #endif
1639         return 0;
1640 }
1641
1642 #ifdef CONFIG_X86_IO_APIC
1643 static int __init parse_acpi_skip_timer_override(char *arg)
1644 {
1645         acpi_skip_timer_override = 1;
1646         return 0;
1647 }
1648 early_param("acpi_skip_timer_override", parse_acpi_skip_timer_override);
1649
1650 static int __init parse_acpi_use_timer_override(char *arg)
1651 {
1652         acpi_use_timer_override = 1;
1653         return 0;
1654 }
1655 early_param("acpi_use_timer_override", parse_acpi_use_timer_override);
1656 #endif /* CONFIG_X86_IO_APIC */
1657
1658 static int __init setup_acpi_sci(char *s)
1659 {
1660         if (!s)
1661                 return -EINVAL;
1662         if (!strcmp(s, "edge"))
1663                 acpi_sci_flags =  ACPI_MADT_TRIGGER_EDGE |
1664                         (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1665         else if (!strcmp(s, "level"))
1666                 acpi_sci_flags = ACPI_MADT_TRIGGER_LEVEL |
1667                         (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1668         else if (!strcmp(s, "high"))
1669                 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_HIGH |
1670                         (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1671         else if (!strcmp(s, "low"))
1672                 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_LOW |
1673                         (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1674         else
1675                 return -EINVAL;
1676         return 0;
1677 }
1678 early_param("acpi_sci", setup_acpi_sci);
1679
1680 int __acpi_acquire_global_lock(unsigned int *lock)
1681 {
1682         unsigned int old, new, val;
1683         do {
1684                 old = *lock;
1685                 new = (((old & ~0x3) + 2) + ((old >> 1) & 0x1));
1686                 val = cmpxchg(lock, old, new);
1687         } while (unlikely (val != old));
1688         return (new < 3) ? -1 : 0;
1689 }
1690
1691 int __acpi_release_global_lock(unsigned int *lock)
1692 {
1693         unsigned int old, new, val;
1694         do {
1695                 old = *lock;
1696                 new = old & ~0x3;
1697                 val = cmpxchg(lock, old, new);
1698         } while (unlikely (val != old));
1699         return old & 0x1;
1700 }
1701
1702 void __init arch_reserve_mem_area(acpi_physical_address addr, size_t size)
1703 {
1704         e820_add_region(addr, size, E820_ACPI);
1705         update_e820();
1706 }