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         if (acpi_irq_model == ACPI_IRQ_MODEL_PIC) {
 617                 *irqp = gsi;
 618                 return 0;
 619         }
 620
 621         rc = acpi_get_override_irq(gsi, &trigger, &polarity);
 622         if (rc == 0) {
 623                 trigger = trigger ? ACPI_LEVEL_SENSITIVE : ACPI_EDGE_SENSITIVE;
 624                 polarity = polarity ? ACPI_ACTIVE_LOW : ACPI_ACTIVE_HIGH;
 625                 irq = acpi_register_gsi(NULL, gsi, trigger, polarity);
 626                 if (irq >= 0) {
 627                         *irqp = irq;
 628                         return 0;
 629                 }
 630         }
 631
 632         return -1;
 633 }
 634 EXPORT_SYMBOL_GPL(acpi_gsi_to_irq);
 635
 636 int acpi_isa_irq_to_gsi(unsigned isa_irq, u32 *gsi)
 637 {
 638         if (isa_irq < nr_legacy_irqs() &&
 639             isa_irq_to_gsi[isa_irq] != ACPI_INVALID_GSI) {
 640                 *gsi = isa_irq_to_gsi[isa_irq];
 641                 return 0;
 642         }
 643
 644         return -1;
 645 }
 646
 647 static int acpi_register_gsi_pic(struct device *dev, u32 gsi,
 648                                  int trigger, int polarity)
 649 {
 650 #ifdef CONFIG_PCI
 651         /*
 652          * Make sure all (legacy) PCI IRQs are set as level-triggered.
 653          */
 654         if (trigger == ACPI_LEVEL_SENSITIVE)
 655                 eisa_set_level_irq(gsi);
 656 #endif
 657
 658         return gsi;
 659 }
 660
 661 #ifdef CONFIG_X86_LOCAL_APIC
 662 static int acpi_register_gsi_ioapic(struct device *dev, u32 gsi,
 663                                     int trigger, int polarity)
 664 {
 665         int irq = gsi;
 666
 667 #ifdef CONFIG_X86_IO_APIC
 668         mutex_lock(&acpi_ioapic_lock);
 669         irq = mp_register_gsi(dev, gsi, trigger, polarity);
 670         mutex_unlock(&acpi_ioapic_lock);
 671 #endif
 672
 673         return irq;
 674 }
 675
 676 static void acpi_unregister_gsi_ioapic(u32 gsi)
 677 {
 678 #ifdef CONFIG_X86_IO_APIC
 679         mutex_lock(&acpi_ioapic_lock);
 680         mp_unregister_gsi(gsi);
 681         mutex_unlock(&acpi_ioapic_lock);
 682 #endif
 683 }
 684 #endif
 685
 686 int (*__acpi_register_gsi)(struct device *dev, u32 gsi,
 687                            int trigger, int polarity) = acpi_register_gsi_pic;
 688 void (*__acpi_unregister_gsi)(u32 gsi) = NULL;
 689
 690 #ifdef CONFIG_ACPI_SLEEP
 691 int (*acpi_suspend_lowlevel)(void) = x86_acpi_suspend_lowlevel;
 692 #else
 693 int (*acpi_suspend_lowlevel)(void);
 694 #endif
 695
 696 /*
 697  * success: return IRQ number (>=0)
 698  * failure: return < 0
 699  */
 700 int acpi_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity)
 701 {
 702         return __acpi_register_gsi(dev, gsi, trigger, polarity);
 703 }
 704 EXPORT_SYMBOL_GPL(acpi_register_gsi);
 705
 706 void acpi_unregister_gsi(u32 gsi)
 707 {
 708         if (__acpi_unregister_gsi)
 709                 __acpi_unregister_gsi(gsi);
 710 }
 711 EXPORT_SYMBOL_GPL(acpi_unregister_gsi);
 712
 713 #ifdef CONFIG_X86_LOCAL_APIC
 714 static void __init acpi_set_irq_model_ioapic(void)
 715 {
 716         acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC;
 717         __acpi_register_gsi = acpi_register_gsi_ioapic;
 718         __acpi_unregister_gsi = acpi_unregister_gsi_ioapic;
 719         acpi_ioapic = 1;
 720 }
 721 #endif
 722
 723 /*
 724  *  ACPI based hotplug support for CPU
 725  */
 726 #ifdef CONFIG_ACPI_HOTPLUG_CPU
 727 #include <acpi/processor.h>
 728
 729 static void acpi_map_cpu2node(acpi_handle handle, int cpu, int physid)
 730 {
 731 #ifdef CONFIG_ACPI_NUMA
 732         int nid;
 733
 734         nid = acpi_get_node(handle);
 735         if (nid != -1) {
 736                 set_apicid_to_node(physid, nid);
 737                 numa_set_node(cpu, nid);
 738         }
 739 #endif
 740 }
 741
 742 static int _acpi_map_lsapic(acpi_handle handle, int physid, int *pcpu)
 743 {
 744         int cpu;
 745
 746         cpu = acpi_register_lapic(physid, ACPI_MADT_ENABLED);
 747         if (cpu < 0) {
 748                 pr_info(PREFIX "Unable to map lapic to logical cpu number\n");
 749                 return cpu;
 750         }
 751
 752         acpi_processor_set_pdc(handle);
 753         acpi_map_cpu2node(handle, cpu, physid);
 754
 755         *pcpu = cpu;
 756         return 0;
 757 }
 758
 759 /* wrapper to silence section mismatch warning */
 760 int __ref acpi_map_cpu(acpi_handle handle, int physid, int *pcpu)
 761 {
 762         return _acpi_map_lsapic(handle, physid, pcpu);
 763 }
 764 EXPORT_SYMBOL(acpi_map_cpu);
 765
 766 int acpi_unmap_cpu(int cpu)
 767 {
 768 #ifdef CONFIG_ACPI_NUMA
 769         set_apicid_to_node(per_cpu(x86_cpu_to_apicid, cpu), NUMA_NO_NODE);
 770 #endif
 771
 772         per_cpu(x86_cpu_to_apicid, cpu) = -1;
 773         set_cpu_present(cpu, false);
 774         num_processors--;
 775
 776         return (0);
 777 }
 778 EXPORT_SYMBOL(acpi_unmap_cpu);
 779 #endif                          /* CONFIG_ACPI_HOTPLUG_CPU */
 780
 781 int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base)
 782 {
 783         int ret = -ENOSYS;
 784 #ifdef CONFIG_ACPI_HOTPLUG_IOAPIC
 785         int ioapic_id;
 786         u64 addr;
 787         struct ioapic_domain_cfg cfg = {
 788                 .type = IOAPIC_DOMAIN_DYNAMIC,
 789                 .ops = &acpi_irqdomain_ops,
 790         };
 791
 792         ioapic_id = acpi_get_ioapic_id(handle, gsi_base, &addr);
 793         if (ioapic_id < 0) {
 794                 unsigned long long uid;
 795                 acpi_status status;
 796
 797                 status = acpi_evaluate_integer(handle, METHOD_NAME__UID,
 798                                                NULL, &uid);
 799                 if (ACPI_FAILURE(status)) {
 800                         acpi_handle_warn(handle, "failed to get IOAPIC ID.\n");
 801                         return -EINVAL;
 802                 }
 803                 ioapic_id = (int)uid;
 804         }
 805
 806         mutex_lock(&acpi_ioapic_lock);
 807         ret  = mp_register_ioapic(ioapic_id, phys_addr, gsi_base, &cfg);
 808         mutex_unlock(&acpi_ioapic_lock);
 809 #endif
 810
 811         return ret;
 812 }
 813 EXPORT_SYMBOL(acpi_register_ioapic);
 814
 815 int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base)
 816 {
 817         int ret = -ENOSYS;
 818
 819 #ifdef CONFIG_ACPI_HOTPLUG_IOAPIC
 820         mutex_lock(&acpi_ioapic_lock);
 821         ret  = mp_unregister_ioapic(gsi_base);
 822         mutex_unlock(&acpi_ioapic_lock);
 823 #endif
 824
 825         return ret;
 826 }
 827 EXPORT_SYMBOL(acpi_unregister_ioapic);
 828
 829 /**
 830  * acpi_ioapic_registered - Check whether IOAPIC assoicatied with @gsi_base
 831  *                          has been registered
 832  * @handle:     ACPI handle of the IOAPIC deivce
 833  * @gsi_base:   GSI base associated with the IOAPIC
 834  *
 835  * Assume caller holds some type of lock to serialize acpi_ioapic_registered()
 836  * with acpi_register_ioapic()/acpi_unregister_ioapic().
 837  */
 838 int acpi_ioapic_registered(acpi_handle handle, u32 gsi_base)
 839 {
 840         int ret = 0;
 841
 842 #ifdef CONFIG_ACPI_HOTPLUG_IOAPIC
 843         mutex_lock(&acpi_ioapic_lock);
 844         ret  = mp_ioapic_registered(gsi_base);
 845         mutex_unlock(&acpi_ioapic_lock);
 846 #endif
 847
 848         return ret;
 849 }
 850
 851 static int __init acpi_parse_sbf(struct acpi_table_header *table)
 852 {
 853         struct acpi_table_boot *sb = (struct acpi_table_boot *)table;
 854
 855         sbf_port = sb->cmos_index;      /* Save CMOS port */
 856
 857         return 0;
 858 }
 859
 860 #ifdef CONFIG_HPET_TIMER
 861 #include <asm/hpet.h>
 862
 863 static struct resource *hpet_res __initdata;
 864
 865 static int __init acpi_parse_hpet(struct acpi_table_header *table)
 866 {
 867         struct acpi_table_hpet *hpet_tbl = (struct acpi_table_hpet *)table;
 868
 869         if (hpet_tbl->address.space_id != ACPI_SPACE_MEM) {
 870                 printk(KERN_WARNING PREFIX "HPET timers must be located in "
 871                        "memory.\n");
 872                 return -1;
 873         }
 874
 875         hpet_address = hpet_tbl->address.address;
 876         hpet_blockid = hpet_tbl->sequence;
 877
 878         /*
 879          * Some broken BIOSes advertise HPET at 0x0. We really do not
 880          * want to allocate a resource there.
 881          */
 882         if (!hpet_address) {
 883                 printk(KERN_WARNING PREFIX
 884                        "HPET id: %#x base: %#lx is invalid\n",
 885                        hpet_tbl->id, hpet_address);
 886                 return 0;
 887         }
 888 #ifdef CONFIG_X86_64
 889         /*
 890          * Some even more broken BIOSes advertise HPET at
 891          * 0xfed0000000000000 instead of 0xfed00000. Fix it up and add
 892          * some noise:
 893          */
 894         if (hpet_address == 0xfed0000000000000UL) {
 895                 if (!hpet_force_user) {
 896                         printk(KERN_WARNING PREFIX "HPET id: %#x "
 897                                "base: 0xfed0000000000000 is bogus\n "
 898                                "try hpet=force on the kernel command line to "
 899                                "fix it up to 0xfed00000.\n", hpet_tbl->id);
 900                         hpet_address = 0;
 901                         return 0;
 902                 }
 903                 printk(KERN_WARNING PREFIX
 904                        "HPET id: %#x base: 0xfed0000000000000 fixed up "
 905                        "to 0xfed00000.\n", hpet_tbl->id);
 906                 hpet_address >>= 32;
 907         }
 908 #endif
 909         printk(KERN_INFO PREFIX "HPET id: %#x base: %#lx\n",
 910                hpet_tbl->id, hpet_address);
 911
 912         /*
 913          * Allocate and initialize the HPET firmware resource for adding into
 914          * the resource tree during the lateinit timeframe.
 915          */
 916 #define HPET_RESOURCE_NAME_SIZE 9
 917         hpet_res = alloc_bootmem(sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE);
 918
 919         hpet_res->name = (void *)&hpet_res[1];
 920         hpet_res->flags = IORESOURCE_MEM;
 921         snprintf((char *)hpet_res->name, HPET_RESOURCE_NAME_SIZE, "HPET %u",
 922                  hpet_tbl->sequence);
 923
 924         hpet_res->start = hpet_address;
 925         hpet_res->end = hpet_address + (1 * 1024) - 1;
 926
 927         return 0;
 928 }
 929
 930 /*
 931  * hpet_insert_resource inserts the HPET resources used into the resource
 932  * tree.
 933  */
 934 static __init int hpet_insert_resource(void)
 935 {
 936         if (!hpet_res)
 937                 return 1;
 938
 939         return insert_resource(&iomem_resource, hpet_res);
 940 }
 941
 942 late_initcall(hpet_insert_resource);
 943
 944 #else
 945 #define acpi_parse_hpet NULL
 946 #endif
 947
 948 static int __init acpi_parse_fadt(struct acpi_table_header *table)
 949 {
 950
 951 #ifdef CONFIG_X86_PM_TIMER
 952         /* detect the location of the ACPI PM Timer */
 953         if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID) {
 954                 /* FADT rev. 2 */
 955                 if (acpi_gbl_FADT.xpm_timer_block.space_id !=
 956                     ACPI_ADR_SPACE_SYSTEM_IO)
 957                         return 0;
 958
 959                 pmtmr_ioport = acpi_gbl_FADT.xpm_timer_block.address;
 960                 /*
 961                  * "X" fields are optional extensions to the original V1.0
 962                  * fields, so we must selectively expand V1.0 fields if the
 963                  * corresponding X field is zero.
 964                  */
 965                 if (!pmtmr_ioport)
 966                         pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
 967         } else {
 968                 /* FADT rev. 1 */
 969                 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
 970         }
 971         if (pmtmr_ioport)
 972                 printk(KERN_INFO PREFIX "PM-Timer IO Port: %#x\n",
 973                        pmtmr_ioport);
 974 #endif
 975         return 0;
 976 }
 977
 978 #ifdef  CONFIG_X86_LOCAL_APIC
 979 /*
 980  * Parse LAPIC entries in MADT
 981  * returns 0 on success, < 0 on error
 982  */
 983
 984 static int __init early_acpi_parse_madt_lapic_addr_ovr(void)
 985 {
 986         int count;
 987
 988         if (!cpu_has_apic)
 989                 return -ENODEV;
 990
 991         /*
 992          * Note that the LAPIC address is obtained from the MADT (32-bit value)
 993          * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value).
 994          */
 995
 996         count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
 997                                       acpi_parse_lapic_addr_ovr, 0);
 998         if (count < 0) {
 999                 printk(KERN_ERR PREFIX
1000                        "Error parsing LAPIC address override entry\n");
1001                 return count;
1002         }
1003
1004         register_lapic_address(acpi_lapic_addr);
1005
1006         return count;
1007 }
1008
1009 static int __init acpi_parse_madt_lapic_entries(void)
1010 {
1011         int count;
1012         int x2count = 0;
1013
1014         if (!cpu_has_apic)
1015                 return -ENODEV;
1016
1017         /*
1018          * Note that the LAPIC address is obtained from the MADT (32-bit value)
1019          * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value).
1020          */
1021
1022         count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
1023                                       acpi_parse_lapic_addr_ovr, 0);
1024         if (count < 0) {
1025                 printk(KERN_ERR PREFIX
1026                        "Error parsing LAPIC address override entry\n");
1027                 return count;
1028         }
1029
1030         register_lapic_address(acpi_lapic_addr);
1031
1032         count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC,
1033                                       acpi_parse_sapic, MAX_LOCAL_APIC);
1034
1035         if (!count) {
1036                 x2count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC,
1037                                         acpi_parse_x2apic, MAX_LOCAL_APIC);
1038                 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC,
1039                                         acpi_parse_lapic, MAX_LOCAL_APIC);
1040         }
1041         if (!count && !x2count) {
1042                 printk(KERN_ERR PREFIX "No LAPIC entries present\n");
1043                 /* TBD: Cleanup to allow fallback to MPS */
1044                 return -ENODEV;
1045         } else if (count < 0 || x2count < 0) {
1046                 printk(KERN_ERR PREFIX "Error parsing LAPIC entry\n");
1047                 /* TBD: Cleanup to allow fallback to MPS */
1048                 return count;
1049         }
1050
1051         x2count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC_NMI,
1052                                         acpi_parse_x2apic_nmi, 0);
1053         count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI,
1054                                       acpi_parse_lapic_nmi, 0);
1055         if (count < 0 || x2count < 0) {
1056                 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n");
1057                 /* TBD: Cleanup to allow fallback to MPS */
1058                 return count;
1059         }
1060         return 0;
1061 }
1062 #endif                          /* CONFIG_X86_LOCAL_APIC */
1063
1064 #ifdef  CONFIG_X86_IO_APIC
1065 static void __init mp_config_acpi_legacy_irqs(void)
1066 {
1067         int i;
1068         struct mpc_intsrc mp_irq;
1069
1070 #ifdef CONFIG_EISA
1071         /*
1072          * Fabricate the legacy ISA bus (bus #31).
1073          */
1074         mp_bus_id_to_type[MP_ISA_BUS] = MP_BUS_ISA;
1075 #endif
1076         set_bit(MP_ISA_BUS, mp_bus_not_pci);
1077         pr_debug("Bus #%d is ISA\n", MP_ISA_BUS);
1078
1079         /*
1080          * Use the default configuration for the IRQs 0-15.  Unless
1081          * overridden by (MADT) interrupt source override entries.
1082          */
1083         for (i = 0; i < nr_legacy_irqs(); i++) {
1084                 int ioapic, pin;
1085                 unsigned int dstapic;
1086                 int idx;
1087                 u32 gsi;
1088
1089                 /* Locate the gsi that irq i maps to. */
1090                 if (acpi_isa_irq_to_gsi(i, &gsi))
1091                         continue;
1092
1093                 /*
1094                  * Locate the IOAPIC that manages the ISA IRQ.
1095                  */
1096                 ioapic = mp_find_ioapic(gsi);
1097                 if (ioapic < 0)
1098                         continue;
1099                 pin = mp_find_ioapic_pin(ioapic, gsi);
1100                 dstapic = mpc_ioapic_id(ioapic);
1101
1102                 for (idx = 0; idx < mp_irq_entries; idx++) {
1103                         struct mpc_intsrc *irq = mp_irqs + idx;
1104
1105                         /* Do we already have a mapping for this ISA IRQ? */
1106                         if (irq->srcbus == MP_ISA_BUS && irq->srcbusirq == i)
1107                                 break;
1108
1109                         /* Do we already have a mapping for this IOAPIC pin */
1110                         if (irq->dstapic == dstapic && irq->dstirq == pin)
1111                                 break;
1112                 }
1113
1114                 if (idx != mp_irq_entries) {
1115                         printk(KERN_DEBUG "ACPI: IRQ%d used by override.\n", i);
1116                         continue;       /* IRQ already used */
1117                 }
1118
1119                 mp_irq.type = MP_INTSRC;
1120                 mp_irq.irqflag = 0;     /* Conforming */
1121                 mp_irq.srcbus = MP_ISA_BUS;
1122                 mp_irq.dstapic = dstapic;
1123                 mp_irq.irqtype = mp_INT;
1124                 mp_irq.srcbusirq = i; /* Identity mapped */
1125                 mp_irq.dstirq = pin;
1126
1127                 mp_save_irq(&mp_irq);
1128         }
1129 }
1130
1131 /*
1132  * Parse IOAPIC related entries in MADT
1133  * returns 0 on success, < 0 on error
1134  */
1135 static int __init acpi_parse_madt_ioapic_entries(void)
1136 {
1137         int count;
1138
1139         /*
1140          * ACPI interpreter is required to complete interrupt setup,
1141          * so if it is off, don't enumerate the io-apics with ACPI.
1142          * If MPS is present, it will handle them,
1143          * otherwise the system will stay in PIC mode
1144          */
1145         if (acpi_disabled || acpi_noirq)
1146                 return -ENODEV;
1147
1148         if (!cpu_has_apic)
1149                 return -ENODEV;
1150
1151         /*
1152          * if "noapic" boot option, don't look for IO-APICs
1153          */
1154         if (skip_ioapic_setup) {
1155                 printk(KERN_INFO PREFIX "Skipping IOAPIC probe "
1156                        "due to 'noapic' option.\n");
1157                 return -ENODEV;
1158         }
1159
1160         count = acpi_table_parse_madt(ACPI_MADT_TYPE_IO_APIC, acpi_parse_ioapic,
1161                                       MAX_IO_APICS);
1162         if (!count) {
1163                 printk(KERN_ERR PREFIX "No IOAPIC entries present\n");
1164                 return -ENODEV;
1165         } else if (count < 0) {
1166                 printk(KERN_ERR PREFIX "Error parsing IOAPIC entry\n");
1167                 return count;
1168         }
1169
1170         count = acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE,
1171                                       acpi_parse_int_src_ovr, nr_irqs);
1172         if (count < 0) {
1173                 printk(KERN_ERR PREFIX
1174                        "Error parsing interrupt source overrides entry\n");
1175                 /* TBD: Cleanup to allow fallback to MPS */
1176                 return count;
1177         }
1178
1179         /*
1180          * If BIOS did not supply an INT_SRC_OVR for the SCI
1181          * pretend we got one so we can set the SCI flags.
1182          */
1183         if (!acpi_sci_override_gsi)
1184                 acpi_sci_ioapic_setup(acpi_gbl_FADT.sci_interrupt, 0, 0,
1185                                       acpi_gbl_FADT.sci_interrupt);
1186
1187         /* Fill in identity legacy mappings where no override */
1188         mp_config_acpi_legacy_irqs();
1189
1190         count = acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE,
1191                                       acpi_parse_nmi_src, nr_irqs);
1192         if (count < 0) {
1193                 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n");
1194                 /* TBD: Cleanup to allow fallback to MPS */
1195                 return count;
1196         }
1197
1198         return 0;
1199 }
1200 #else
1201 static inline int acpi_parse_madt_ioapic_entries(void)
1202 {
1203         return -1;
1204 }
1205 #endif  /* !CONFIG_X86_IO_APIC */
1206
1207 static void __init early_acpi_process_madt(void)
1208 {
1209 #ifdef CONFIG_X86_LOCAL_APIC
1210         int error;
1211
1212         if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1213
1214                 /*
1215                  * Parse MADT LAPIC entries
1216                  */
1217                 error = early_acpi_parse_madt_lapic_addr_ovr();
1218                 if (!error) {
1219                         acpi_lapic = 1;
1220                         smp_found_config = 1;
1221                 }
1222                 if (error == -EINVAL) {
1223                         /*
1224                          * Dell Precision Workstation 410, 610 come here.
1225                          */
1226                         printk(KERN_ERR PREFIX
1227                                "Invalid BIOS MADT, disabling ACPI\n");
1228                         disable_acpi();
1229                 }
1230         }
1231 #endif
1232 }
1233
1234 static void __init acpi_process_madt(void)
1235 {
1236 #ifdef CONFIG_X86_LOCAL_APIC
1237         int error;
1238
1239         if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1240
1241                 /*
1242                  * Parse MADT LAPIC entries
1243                  */
1244                 error = acpi_parse_madt_lapic_entries();
1245                 if (!error) {
1246                         acpi_lapic = 1;
1247
1248                         /*
1249                          * Parse MADT IO-APIC entries
1250                          */
1251                         mutex_lock(&acpi_ioapic_lock);
1252                         error = acpi_parse_madt_ioapic_entries();
1253                         mutex_unlock(&acpi_ioapic_lock);
1254                         if (!error) {
1255                                 acpi_set_irq_model_ioapic();
1256
1257                                 smp_found_config = 1;
1258                         }
1259                 }
1260                 if (error == -EINVAL) {
1261                         /*
1262                          * Dell Precision Workstation 410, 610 come here.
1263                          */
1264                         printk(KERN_ERR PREFIX
1265                                "Invalid BIOS MADT, disabling ACPI\n");
1266                         disable_acpi();
1267                 }
1268         } else {
1269                 /*
1270                  * ACPI found no MADT, and so ACPI wants UP PIC mode.
1271                  * In the event an MPS table was found, forget it.
1272                  * Boot with "acpi=off" to use MPS on such a system.
1273                  */
1274                 if (smp_found_config) {
1275                         printk(KERN_WARNING PREFIX
1276                                 "No APIC-table, disabling MPS\n");
1277                         smp_found_config = 0;
1278                 }
1279         }
1280
1281         /*
1282          * ACPI supports both logical (e.g. Hyper-Threading) and physical
1283          * processors, where MPS only supports physical.
1284          */
1285         if (acpi_lapic && acpi_ioapic)
1286                 printk(KERN_INFO "Using ACPI (MADT) for SMP configuration "
1287                        "information\n");
1288         else if (acpi_lapic)
1289                 printk(KERN_INFO "Using ACPI for processor (LAPIC) "
1290                        "configuration information\n");
1291 #endif
1292         return;
1293 }
1294
1295 static int __init disable_acpi_irq(const struct dmi_system_id *d)
1296 {
1297         if (!acpi_force) {
1298                 printk(KERN_NOTICE "%s detected: force use of acpi=noirq\n",
1299                        d->ident);
1300                 acpi_noirq_set();
1301         }
1302         return 0;
1303 }
1304
1305 static int __init disable_acpi_pci(const struct dmi_system_id *d)
1306 {
1307         if (!acpi_force) {
1308                 printk(KERN_NOTICE "%s detected: force use of pci=noacpi\n",
1309                        d->ident);
1310                 acpi_disable_pci();
1311         }
1312         return 0;
1313 }
1314
1315 static int __init dmi_disable_acpi(const struct dmi_system_id *d)
1316 {
1317         if (!acpi_force) {
1318                 printk(KERN_NOTICE "%s detected: acpi off\n", d->ident);
1319                 disable_acpi();
1320         } else {
1321                 printk(KERN_NOTICE
1322                        "Warning: DMI blacklist says broken, but acpi forced\n");
1323         }
1324         return 0;
1325 }
1326
1327 /*
1328  * Force ignoring BIOS IRQ0 override
1329  */
1330 static int __init dmi_ignore_irq0_timer_override(const struct dmi_system_id *d)
1331 {
1332         if (!acpi_skip_timer_override) {
1333                 pr_notice("%s detected: Ignoring BIOS IRQ0 override\n",
1334                         d->ident);
1335                 acpi_skip_timer_override = 1;
1336         }
1337         return 0;
1338 }
1339
1340 /*
1341  * If your system is blacklisted here, but you find that acpi=force
1342  * works for you, please contact linux-acpi@vger.kernel.org
1343  */
1344 static struct dmi_system_id __initdata acpi_dmi_table[] = {
1345         /*
1346          * Boxes that need ACPI disabled
1347          */
1348         {
1349          .callback = dmi_disable_acpi,
1350          .ident = "IBM Thinkpad",
1351          .matches = {
1352                      DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1353                      DMI_MATCH(DMI_BOARD_NAME, "2629H1G"),
1354                      },
1355          },
1356
1357         /*
1358          * Boxes that need ACPI PCI IRQ routing disabled
1359          */
1360         {
1361          .callback = disable_acpi_irq,
1362          .ident = "ASUS A7V",
1363          .matches = {
1364                      DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC"),
1365                      DMI_MATCH(DMI_BOARD_NAME, "<A7V>"),
1366                      /* newer BIOS, Revision 1011, does work */
1367                      DMI_MATCH(DMI_BIOS_VERSION,
1368                                "ASUS A7V ACPI BIOS Revision 1007"),
1369                      },
1370          },
1371         {
1372                 /*
1373                  * Latest BIOS for IBM 600E (1.16) has bad pcinum
1374                  * for LPC bridge, which is needed for the PCI
1375                  * interrupt links to work. DSDT fix is in bug 5966.
1376                  * 2645, 2646 model numbers are shared with 600/600E/600X
1377                  */
1378          .callback = disable_acpi_irq,
1379          .ident = "IBM Thinkpad 600 Series 2645",
1380          .matches = {
1381                      DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1382                      DMI_MATCH(DMI_BOARD_NAME, "2645"),
1383                      },
1384          },
1385         {
1386          .callback = disable_acpi_irq,
1387          .ident = "IBM Thinkpad 600 Series 2646",
1388          .matches = {
1389                      DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1390                      DMI_MATCH(DMI_BOARD_NAME, "2646"),
1391                      },
1392          },
1393         /*
1394          * Boxes that need ACPI PCI IRQ routing and PCI scan disabled
1395          */
1396         {                       /* _BBN 0 bug */
1397          .callback = disable_acpi_pci,
1398          .ident = "ASUS PR-DLS",
1399          .matches = {
1400                      DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1401                      DMI_MATCH(DMI_BOARD_NAME, "PR-DLS"),
1402                      DMI_MATCH(DMI_BIOS_VERSION,
1403                                "ASUS PR-DLS ACPI BIOS Revision 1010"),
1404                      DMI_MATCH(DMI_BIOS_DATE, "03/21/2003")
1405                      },
1406          },
1407         {
1408          .callback = disable_acpi_pci,
1409          .ident = "Acer TravelMate 36x Laptop",
1410          .matches = {
1411                      DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
1412                      DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"),
1413                      },
1414          },
1415         {}
1416 };
1417
1418 /* second table for DMI checks that should run after early-quirks */
1419 static struct dmi_system_id __initdata acpi_dmi_table_late[] = {
1420         /*
1421          * HP laptops which use a DSDT reporting as HP/SB400/10000,
1422          * which includes some code which overrides all temperature
1423          * trip points to 16C if the INTIN2 input of the I/O APIC
1424          * is enabled.  This input is incorrectly designated the
1425          * ISA IRQ 0 via an interrupt source override even though
1426          * it is wired to the output of the master 8259A and INTIN0
1427          * is not connected at all.  Force ignoring BIOS IRQ0
1428          * override in that cases.
1429          */
1430         {
1431          .callback = dmi_ignore_irq0_timer_override,
1432          .ident = "HP nx6115 laptop",
1433          .matches = {
1434                      DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1435                      DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6115"),
1436                      },
1437          },
1438         {
1439          .callback = dmi_ignore_irq0_timer_override,
1440          .ident = "HP NX6125 laptop",
1441          .matches = {
1442                      DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1443                      DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6125"),
1444                      },
1445          },
1446         {
1447          .callback = dmi_ignore_irq0_timer_override,
1448          .ident = "HP NX6325 laptop",
1449          .matches = {
1450                      DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1451                      DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6325"),
1452                      },
1453          },
1454         {
1455          .callback = dmi_ignore_irq0_timer_override,
1456          .ident = "HP 6715b laptop",
1457          .matches = {
1458                      DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1459                      DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq 6715b"),
1460                      },
1461          },
1462         {
1463          .callback = dmi_ignore_irq0_timer_override,
1464          .ident = "FUJITSU SIEMENS",
1465          .matches = {
1466                      DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
1467                      DMI_MATCH(DMI_PRODUCT_NAME, "AMILO PRO V2030"),
1468                      },
1469          },
1470         {}
1471 };
1472
1473 /*
1474  * acpi_boot_table_init() and acpi_boot_init()
1475  *  called from setup_arch(), always.
1476  *      1. checksums all tables
1477  *      2. enumerates lapics
1478  *      3. enumerates io-apics
1479  *
1480  * acpi_table_init() is separate to allow reading SRAT without
1481  * other side effects.
1482  *
1483  * side effects of acpi_boot_init:
1484  *      acpi_lapic = 1 if LAPIC found
1485  *      acpi_ioapic = 1 if IOAPIC found
1486  *      if (acpi_lapic && acpi_ioapic) smp_found_config = 1;
1487  *      if acpi_blacklisted() acpi_disabled = 1;
1488  *      acpi_irq_model=...
1489  *      ...
1490  */
1491
1492 void __init acpi_boot_table_init(void)
1493 {
1494         dmi_check_system(acpi_dmi_table);
1495
1496         /*
1497          * If acpi_disabled, bail out
1498          */
1499         if (acpi_disabled)
1500                 return;
1501
1502         /*
1503          * Initialize the ACPI boot-time table parser.
1504          */
1505         if (acpi_table_init()) {
1506                 disable_acpi();
1507                 return;
1508         }
1509
1510         acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1511
1512         /*
1513          * blacklist may disable ACPI entirely
1514          */
1515         if (acpi_blacklisted()) {
1516                 if (acpi_force) {
1517                         printk(KERN_WARNING PREFIX "acpi=force override\n");
1518                 } else {
1519                         printk(KERN_WARNING PREFIX "Disabling ACPI support\n");
1520                         disable_acpi();
1521                         return;
1522                 }
1523         }
1524 }
1525
1526 int __init early_acpi_boot_init(void)
1527 {
1528         /*
1529          * If acpi_disabled, bail out
1530          */
1531         if (acpi_disabled)
1532                 return 1;
1533
1534         /*
1535          * Process the Multiple APIC Description Table (MADT), if present
1536          */
1537         early_acpi_process_madt();
1538
1539         return 0;
1540 }
1541
1542 int __init acpi_boot_init(void)
1543 {
1544         /* those are executed after early-quirks are executed */
1545         dmi_check_system(acpi_dmi_table_late);
1546
1547         /*
1548          * If acpi_disabled, bail out
1549          */
1550         if (acpi_disabled)
1551                 return 1;
1552
1553         acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1554
1555         /*
1556          * set sci_int and PM timer address
1557          */
1558         acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt);
1559
1560         /*
1561          * Process the Multiple APIC Description Table (MADT), if present
1562          */
1563         acpi_process_madt();
1564
1565         acpi_table_parse(ACPI_SIG_HPET, acpi_parse_hpet);
1566
1567         if (!acpi_noirq)
1568                 x86_init.pci.init = pci_acpi_init;
1569
1570         return 0;
1571 }
1572
1573 static int __init parse_acpi(char *arg)
1574 {
1575         if (!arg)
1576                 return -EINVAL;
1577
1578         /* "acpi=off" disables both ACPI table parsing and interpreter */
1579         if (strcmp(arg, "off") == 0) {
1580                 disable_acpi();
1581         }
1582         /* acpi=force to over-ride black-list */
1583         else if (strcmp(arg, "force") == 0) {
1584                 acpi_force = 1;
1585                 acpi_disabled = 0;
1586         }
1587         /* acpi=strict disables out-of-spec workarounds */
1588         else if (strcmp(arg, "strict") == 0) {
1589                 acpi_strict = 1;
1590         }
1591         /* acpi=rsdt use RSDT instead of XSDT */
1592         else if (strcmp(arg, "rsdt") == 0) {
1593                 acpi_gbl_do_not_use_xsdt = TRUE;
1594         }
1595         /* "acpi=noirq" disables ACPI interrupt routing */
1596         else if (strcmp(arg, "noirq") == 0) {
1597                 acpi_noirq_set();
1598         }
1599         /* "acpi=copy_dsdt" copys DSDT */
1600         else if (strcmp(arg, "copy_dsdt") == 0) {
1601                 acpi_gbl_copy_dsdt_locally = 1;
1602         }
1603         /* "acpi=nocmcff" disables FF mode for corrected errors */
1604         else if (strcmp(arg, "nocmcff") == 0) {
1605                 acpi_disable_cmcff = 1;
1606         } else {
1607                 /* Core will printk when we return error. */
1608                 return -EINVAL;
1609         }
1610         return 0;
1611 }
1612 early_param("acpi", parse_acpi);
1613
1614 /* FIXME: Using pci= for an ACPI parameter is a travesty. */
1615 static int __init parse_pci(char *arg)
1616 {
1617         if (arg && strcmp(arg, "noacpi") == 0)
1618                 acpi_disable_pci();
1619         return 0;
1620 }
1621 early_param("pci", parse_pci);
1622
1623 int __init acpi_mps_check(void)
1624 {
1625 #if defined(CONFIG_X86_LOCAL_APIC) && !defined(CONFIG_X86_MPPARSE)
1626 /* mptable code is not built-in*/
1627         if (acpi_disabled || acpi_noirq) {
1628                 printk(KERN_WARNING "MPS support code is not built-in.\n"
1629                        "Using acpi=off or acpi=noirq or pci=noacpi "
1630                        "may have problem\n");
1631                 return 1;
1632         }
1633 #endif
1634         return 0;
1635 }
1636
1637 #ifdef CONFIG_X86_IO_APIC
1638 static int __init parse_acpi_skip_timer_override(char *arg)
1639 {
1640         acpi_skip_timer_override = 1;
1641         return 0;
1642 }
1643 early_param("acpi_skip_timer_override", parse_acpi_skip_timer_override);
1644
1645 static int __init parse_acpi_use_timer_override(char *arg)
1646 {
1647         acpi_use_timer_override = 1;
1648         return 0;
1649 }
1650 early_param("acpi_use_timer_override", parse_acpi_use_timer_override);
1651 #endif /* CONFIG_X86_IO_APIC */
1652
1653 static int __init setup_acpi_sci(char *s)
1654 {
1655         if (!s)
1656                 return -EINVAL;
1657         if (!strcmp(s, "edge"))
1658                 acpi_sci_flags =  ACPI_MADT_TRIGGER_EDGE |
1659                         (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1660         else if (!strcmp(s, "level"))
1661                 acpi_sci_flags = ACPI_MADT_TRIGGER_LEVEL |
1662                         (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1663         else if (!strcmp(s, "high"))
1664                 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_HIGH |
1665                         (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1666         else if (!strcmp(s, "low"))
1667                 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_LOW |
1668                         (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1669         else
1670                 return -EINVAL;
1671         return 0;
1672 }
1673 early_param("acpi_sci", setup_acpi_sci);
1674
1675 int __acpi_acquire_global_lock(unsigned int *lock)
1676 {
1677         unsigned int old, new, val;
1678         do {
1679                 old = *lock;
1680                 new = (((old & ~0x3) + 2) + ((old >> 1) & 0x1));
1681                 val = cmpxchg(lock, old, new);
1682         } while (unlikely (val != old));
1683         return (new < 3) ? -1 : 0;
1684 }
1685
1686 int __acpi_release_global_lock(unsigned int *lock)
1687 {
1688         unsigned int old, new, val;
1689         do {
1690                 old = *lock;
1691                 new = old & ~0x3;
1692                 val = cmpxchg(lock, old, new);
1693         } while (unlikely (val != old));
1694         return old & 0x1;
1695 }
1696
1697 void __init arch_reserve_mem_area(acpi_physical_address addr, size_t size)
1698 {
1699         e820_add_region(addr, size, E820_ACPI);
1700         update_e820();
1701 }