arch/x86/kernel/acpi/boot.c

   1 /*
   2  *  boot.c - Architecture-Specific Low-Level ACPI Boot Support
   3  *
   4  *  Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
   5  *  Copyright (C) 2001 Jun Nakajima <jun.nakajima@intel.com>
   6  *
   7  * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   8  *
   9  *  This program is free software; you can redistribute it and/or modify
  10  *  it under the terms of the GNU General Public License as published by
  11  *  the Free Software Foundation; either version 2 of the License, or
  12  *  (at your option) any later version.
  13  *
  14  *  This program is distributed in the hope that it will be useful,
  15  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  *  GNU General Public License for more details.
  18  *
  19  *  You should have received a copy of the GNU General Public License
  20  *  along with this program; if not, write to the Free Software
  21  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  22  *
  23  * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  24  */
  25
  26 #include <linux/init.h>
  27 #include <linux/acpi.h>
  28 #include <linux/acpi_pmtmr.h>
  29 #include <linux/efi.h>
  30 #include <linux/cpumask.h>
  31 #include <linux/export.h>
  32 #include <linux/dmi.h>
  33 #include <linux/irq.h>
  34 #include <linux/slab.h>
  35 #include <linux/memblock.h>
  36 #include <linux/ioport.h>
  37 #include <linux/pci.h>
  38 #include <linux/efi-bgrt.h>
  39 #include <linux/serial_core.h>
  40
  41 #include <asm/e820/api.h>
  42 #include <asm/irqdomain.h>
  43 #include <asm/pci_x86.h>
  44 #include <asm/pgtable.h>
  45 #include <asm/io_apic.h>
  46 #include <asm/apic.h>
  47 #include <asm/io.h>
  48 #include <asm/mpspec.h>
  49 #include <asm/smp.h>
  50 #include <asm/i8259.h>
  51 #include <asm/setup.h>
  52
  53 #include "sleep.h" /* To include x86_acpi_suspend_lowlevel */
  54 static int __initdata acpi_force = 0;
  55 int acpi_disabled;
  56 EXPORT_SYMBOL(acpi_disabled);
  57
  58 #ifdef  CONFIG_X86_64
  59 # include <asm/proto.h>
  60 #endif                          /* X86 */
  61
  62 #define PREFIX                  "ACPI: "
  63
  64 int acpi_noirq;                         /* skip ACPI IRQ initialization */
  65 int acpi_pci_disabled;          /* skip ACPI PCI scan and IRQ initialization */
  66 EXPORT_SYMBOL(acpi_pci_disabled);
  67
  68 int acpi_lapic;
  69 int acpi_ioapic;
  70 int acpi_strict;
  71 int acpi_disable_cmcff;
  72
  73 /* ACPI SCI override configuration */
  74 u8 acpi_sci_flags __initdata;
  75 u32 acpi_sci_override_gsi __initdata = INVALID_ACPI_IRQ;
  76 int acpi_skip_timer_override __initdata;
  77 int acpi_use_timer_override __initdata;
  78 int acpi_fix_pin2_polarity __initdata;
  79
  80 #ifdef CONFIG_X86_LOCAL_APIC
  81 static u64 acpi_lapic_addr __initdata = APIC_DEFAULT_PHYS_BASE;
  82 #endif
  83
  84 #ifdef CONFIG_X86_IO_APIC
  85 /*
  86  * Locks related to IOAPIC hotplug
  87  * Hotplug side:
  88  *      ->device_hotplug_lock
  89  *              ->acpi_ioapic_lock
  90  *                      ->ioapic_lock
  91  * Interrupt mapping side:
  92  *      ->acpi_ioapic_lock
  93  *              ->ioapic_mutex
  94  *                      ->ioapic_lock
  95  */
  96 static DEFINE_MUTEX(acpi_ioapic_lock);
  97 #endif
  98
  99 /* --------------------------------------------------------------------------
 100                               Boot-time Configuration
 101    -------------------------------------------------------------------------- */
 102
 103 /*
 104  * The default interrupt routing model is PIC (8259).  This gets
 105  * overridden if IOAPICs are enumerated (below).
 106  */
 107 enum acpi_irq_model_id acpi_irq_model = ACPI_IRQ_MODEL_PIC;
 108
 109
 110 /*
 111  * ISA irqs by default are the first 16 gsis but can be
 112  * any gsi as specified by an interrupt source override.
 113  */
 114 static u32 isa_irq_to_gsi[NR_IRQS_LEGACY] __read_mostly = {
 115         0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15
 116 };
 117
 118 /*
 119  * This is just a simple wrapper around early_memremap(),
 120  * with sanity checks for phys == 0 and size == 0.
 121  */
 122 void __init __iomem *__acpi_map_table(unsigned long phys, unsigned long size)
 123 {
 124
 125         if (!phys || !size)
 126                 return NULL;
 127
 128         return early_memremap(phys, size);
 129 }
 130
 131 void __init __acpi_unmap_table(void __iomem *map, unsigned long size)
 132 {
 133         if (!map || !size)
 134                 return;
 135
 136         early_memunmap(map, size);
 137 }
 138
 139 #ifdef CONFIG_X86_LOCAL_APIC
 140 static int __init acpi_parse_madt(struct acpi_table_header *table)
 141 {
 142         struct acpi_table_madt *madt = NULL;
 143
 144         if (!boot_cpu_has(X86_FEATURE_APIC))
 145                 return -EINVAL;
 146
 147         madt = (struct acpi_table_madt *)table;
 148         if (!madt) {
 149                 printk(KERN_WARNING PREFIX "Unable to map MADT\n");
 150                 return -ENODEV;
 151         }
 152
 153         if (madt->address) {
 154                 acpi_lapic_addr = (u64) madt->address;
 155
 156                 printk(KERN_DEBUG PREFIX "Local APIC address 0x%08x\n",
 157                        madt->address);
 158         }
 159
 160         default_acpi_madt_oem_check(madt->header.oem_id,
 161                                     madt->header.oem_table_id);
 162
 163         return 0;
 164 }
 165
 166 /**
 167  * acpi_register_lapic - register a local apic and generates a logic cpu number
 168  * @id: local apic id to register
 169  * @acpiid: ACPI id to register
 170  * @enabled: this cpu is enabled or not
 171  *
 172  * Returns the logic cpu number which maps to the local apic
 173  */
 174 static int acpi_register_lapic(int id, u32 acpiid, u8 enabled)
 175 {
 176         unsigned int ver = 0;
 177         int cpu;
 178
 179         if (id >= MAX_LOCAL_APIC) {
 180                 printk(KERN_INFO PREFIX "skipped apicid that is too big\n");
 181                 return -EINVAL;
 182         }
 183
 184         if (!enabled) {
 185                 ++disabled_cpus;
 186                 return -EINVAL;
 187         }
 188
 189         if (boot_cpu_physical_apicid != -1U)
 190                 ver = boot_cpu_apic_version;
 191
 192         cpu = generic_processor_info(id, ver);
 193         if (cpu >= 0)
 194                 early_per_cpu(x86_cpu_to_acpiid, cpu) = acpiid;
 195
 196         return cpu;
 197 }
 198
 199 static int __init
 200 acpi_parse_x2apic(struct acpi_subtable_header *header, const unsigned long end)
 201 {
 202         struct acpi_madt_local_x2apic *processor = NULL;
 203 #ifdef CONFIG_X86_X2APIC
 204         u32 apic_id;
 205         u8 enabled;
 206 #endif
 207
 208         processor = (struct acpi_madt_local_x2apic *)header;
 209
 210         if (BAD_MADT_ENTRY(processor, end))
 211                 return -EINVAL;
 212
 213         acpi_table_print_madt_entry(header);
 214
 215 #ifdef CONFIG_X86_X2APIC
 216         apic_id = processor->local_apic_id;
 217         enabled = processor->lapic_flags & ACPI_MADT_ENABLED;
 218
 219         /* Ignore invalid ID */
 220         if (apic_id == 0xffffffff)
 221                 return 0;
 222
 223         /*
 224          * We need to register disabled CPU as well to permit
 225          * counting disabled CPUs. This allows us to size
 226          * cpus_possible_map more accurately, to permit
 227          * to not preallocating memory for all NR_CPUS
 228          * when we use CPU hotplug.
 229          */
 230         if (!apic->apic_id_valid(apic_id)) {
 231                 if (enabled)
 232                         pr_warn(PREFIX "x2apic entry ignored\n");
 233                 return 0;
 234         }
 235
 236         acpi_register_lapic(apic_id, processor->uid, enabled);
 237 #else
 238         printk(KERN_WARNING PREFIX "x2apic entry ignored\n");
 239 #endif
 240
 241         return 0;
 242 }
 243
 244 static int __init
 245 acpi_parse_lapic(struct acpi_subtable_header * header, const unsigned long end)
 246 {
 247         struct acpi_madt_local_apic *processor = NULL;
 248
 249         processor = (struct acpi_madt_local_apic *)header;
 250
 251         if (BAD_MADT_ENTRY(processor, end))
 252                 return -EINVAL;
 253
 254         acpi_table_print_madt_entry(header);
 255
 256         /* Ignore invalid ID */
 257         if (processor->id == 0xff)
 258                 return 0;
 259
 260         /*
 261          * We need to register disabled CPU as well to permit
 262          * counting disabled CPUs. This allows us to size
 263          * cpus_possible_map more accurately, to permit
 264          * to not preallocating memory for all NR_CPUS
 265          * when we use CPU hotplug.
 266          */
 267         acpi_register_lapic(processor->id,      /* APIC ID */
 268                             processor->processor_id, /* ACPI ID */
 269                             processor->lapic_flags & ACPI_MADT_ENABLED);
 270
 271         return 0;
 272 }
 273
 274 static int __init
 275 acpi_parse_sapic(struct acpi_subtable_header *header, const unsigned long end)
 276 {
 277         struct acpi_madt_local_sapic *processor = NULL;
 278
 279         processor = (struct acpi_madt_local_sapic *)header;
 280
 281         if (BAD_MADT_ENTRY(processor, end))
 282                 return -EINVAL;
 283
 284         acpi_table_print_madt_entry(header);
 285
 286         acpi_register_lapic((processor->id << 8) | processor->eid,/* APIC ID */
 287                             processor->processor_id, /* ACPI ID */
 288                             processor->lapic_flags & ACPI_MADT_ENABLED);
 289
 290         return 0;
 291 }
 292
 293 static int __init
 294 acpi_parse_lapic_addr_ovr(struct acpi_subtable_header * header,
 295                           const unsigned long end)
 296 {
 297         struct acpi_madt_local_apic_override *lapic_addr_ovr = NULL;
 298
 299         lapic_addr_ovr = (struct acpi_madt_local_apic_override *)header;
 300
 301         if (BAD_MADT_ENTRY(lapic_addr_ovr, end))
 302                 return -EINVAL;
 303
 304         acpi_table_print_madt_entry(header);
 305
 306         acpi_lapic_addr = lapic_addr_ovr->address;
 307
 308         return 0;
 309 }
 310
 311 static int __init
 312 acpi_parse_x2apic_nmi(struct acpi_subtable_header *header,
 313                       const unsigned long end)
 314 {
 315         struct acpi_madt_local_x2apic_nmi *x2apic_nmi = NULL;
 316
 317         x2apic_nmi = (struct acpi_madt_local_x2apic_nmi *)header;
 318
 319         if (BAD_MADT_ENTRY(x2apic_nmi, end))
 320                 return -EINVAL;
 321
 322         acpi_table_print_madt_entry(header);
 323
 324         if (x2apic_nmi->lint != 1)
 325                 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n");
 326
 327         return 0;
 328 }
 329
 330 static int __init
 331 acpi_parse_lapic_nmi(struct acpi_subtable_header * header, const unsigned long end)
 332 {
 333         struct acpi_madt_local_apic_nmi *lapic_nmi = NULL;
 334
 335         lapic_nmi = (struct acpi_madt_local_apic_nmi *)header;
 336
 337         if (BAD_MADT_ENTRY(lapic_nmi, end))
 338                 return -EINVAL;
 339
 340         acpi_table_print_madt_entry(header);
 341
 342         if (lapic_nmi->lint != 1)
 343                 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n");
 344
 345         return 0;
 346 }
 347
 348 #endif                          /*CONFIG_X86_LOCAL_APIC */
 349
 350 #ifdef CONFIG_X86_IO_APIC
 351 #define MP_ISA_BUS              0
 352
 353 static int __init mp_register_ioapic_irq(u8 bus_irq, u8 polarity,
 354                                                 u8 trigger, u32 gsi);
 355
 356 static void __init mp_override_legacy_irq(u8 bus_irq, u8 polarity, u8 trigger,
 357                                           u32 gsi)
 358 {
 359         /*
 360          * Check bus_irq boundary.
 361          */
 362         if (bus_irq >= NR_IRQS_LEGACY) {
 363                 pr_warn("Invalid bus_irq %u for legacy override\n", bus_irq);
 364                 return;
 365         }
 366
 367         /*
 368          * TBD: This check is for faulty timer entries, where the override
 369          *      erroneously sets the trigger to level, resulting in a HUGE
 370          *      increase of timer interrupts!
 371          */
 372         if ((bus_irq == 0) && (trigger == 3))
 373                 trigger = 1;
 374
 375         if (mp_register_ioapic_irq(bus_irq, polarity, trigger, gsi) < 0)
 376                 return;
 377         /*
 378          * Reset default identity mapping if gsi is also an legacy IRQ,
 379          * otherwise there will be more than one entry with the same GSI
 380          * and acpi_isa_irq_to_gsi() may give wrong result.
 381          */
 382         if (gsi < nr_legacy_irqs() && isa_irq_to_gsi[gsi] == gsi)
 383                 isa_irq_to_gsi[gsi] = INVALID_ACPI_IRQ;
 384         isa_irq_to_gsi[bus_irq] = gsi;
 385 }
 386
 387 static int mp_config_acpi_gsi(struct device *dev, u32 gsi, int trigger,
 388                         int polarity)
 389 {
 390 #ifdef CONFIG_X86_MPPARSE
 391         struct mpc_intsrc mp_irq;
 392         struct pci_dev *pdev;
 393         unsigned char number;
 394         unsigned int devfn;
 395         int ioapic;
 396         u8 pin;
 397
 398         if (!acpi_ioapic)
 399                 return 0;
 400         if (!dev || !dev_is_pci(dev))
 401                 return 0;
 402
 403         pdev = to_pci_dev(dev);
 404         number = pdev->bus->number;
 405         devfn = pdev->devfn;
 406         pin = pdev->pin;
 407         /* print the entry should happen on mptable identically */
 408         mp_irq.type = MP_INTSRC;
 409         mp_irq.irqtype = mp_INT;
 410         mp_irq.irqflag = (trigger == ACPI_EDGE_SENSITIVE ? 4 : 0x0c) |
 411                                 (polarity == ACPI_ACTIVE_HIGH ? 1 : 3);
 412         mp_irq.srcbus = number;
 413         mp_irq.srcbusirq = (((devfn >> 3) & 0x1f) << 2) | ((pin - 1) & 3);
 414         ioapic = mp_find_ioapic(gsi);
 415         mp_irq.dstapic = mpc_ioapic_id(ioapic);
 416         mp_irq.dstirq = mp_find_ioapic_pin(ioapic, gsi);
 417
 418         mp_save_irq(&mp_irq);
 419 #endif
 420         return 0;
 421 }
 422
 423 static int __init mp_register_ioapic_irq(u8 bus_irq, u8 polarity,
 424                                                 u8 trigger, u32 gsi)
 425 {
 426         struct mpc_intsrc mp_irq;
 427         int ioapic, pin;
 428
 429         /* Convert 'gsi' to 'ioapic.pin'(INTIN#) */
 430         ioapic = mp_find_ioapic(gsi);
 431         if (ioapic < 0) {
 432                 pr_warn("Failed to find ioapic for gsi : %u\n", gsi);
 433                 return ioapic;
 434         }
 435
 436         pin = mp_find_ioapic_pin(ioapic, gsi);
 437
 438         mp_irq.type = MP_INTSRC;
 439         mp_irq.irqtype = mp_INT;
 440         mp_irq.irqflag = (trigger << 2) | polarity;
 441         mp_irq.srcbus = MP_ISA_BUS;
 442         mp_irq.srcbusirq = bus_irq;
 443         mp_irq.dstapic = mpc_ioapic_id(ioapic);
 444         mp_irq.dstirq = pin;
 445
 446         mp_save_irq(&mp_irq);
 447
 448         return 0;
 449 }
 450
 451 static int __init
 452 acpi_parse_ioapic(struct acpi_subtable_header * header, const unsigned long end)
 453 {
 454         struct acpi_madt_io_apic *ioapic = NULL;
 455         struct ioapic_domain_cfg cfg = {
 456                 .type = IOAPIC_DOMAIN_DYNAMIC,
 457                 .ops = &mp_ioapic_irqdomain_ops,
 458         };
 459
 460         ioapic = (struct acpi_madt_io_apic *)header;
 461
 462         if (BAD_MADT_ENTRY(ioapic, end))
 463                 return -EINVAL;
 464
 465         acpi_table_print_madt_entry(header);
 466
 467         /* Statically assign IRQ numbers for IOAPICs hosting legacy IRQs */
 468         if (ioapic->global_irq_base < nr_legacy_irqs())
 469                 cfg.type = IOAPIC_DOMAIN_LEGACY;
 470
 471         mp_register_ioapic(ioapic->id, ioapic->address, ioapic->global_irq_base,
 472                            &cfg);
 473
 474         return 0;
 475 }
 476
 477 /*
 478  * Parse Interrupt Source Override for the ACPI SCI
 479  */
 480 static void __init acpi_sci_ioapic_setup(u8 bus_irq, u16 polarity, u16 trigger, u32 gsi)
 481 {
 482         if (trigger == 0)       /* compatible SCI trigger is level */
 483                 trigger = 3;
 484
 485         if (polarity == 0)      /* compatible SCI polarity is low */
 486                 polarity = 3;
 487
 488         /* Command-line over-ride via acpi_sci= */
 489         if (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK)
 490                 trigger = (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2;
 491
 492         if (acpi_sci_flags & ACPI_MADT_POLARITY_MASK)
 493                 polarity = acpi_sci_flags & ACPI_MADT_POLARITY_MASK;
 494
 495         if (bus_irq < NR_IRQS_LEGACY)
 496                 mp_override_legacy_irq(bus_irq, polarity, trigger, gsi);
 497         else
 498                 mp_register_ioapic_irq(bus_irq, polarity, trigger, gsi);
 499
 500         acpi_penalize_sci_irq(bus_irq, trigger, polarity);
 501
 502         /*
 503          * stash over-ride to indicate we've been here
 504          * and for later update of acpi_gbl_FADT
 505          */
 506         acpi_sci_override_gsi = gsi;
 507         return;
 508 }
 509
 510 static int __init
 511 acpi_parse_int_src_ovr(struct acpi_subtable_header * header,
 512                        const unsigned long end)
 513 {
 514         struct acpi_madt_interrupt_override *intsrc = NULL;
 515
 516         intsrc = (struct acpi_madt_interrupt_override *)header;
 517
 518         if (BAD_MADT_ENTRY(intsrc, end))
 519                 return -EINVAL;
 520
 521         acpi_table_print_madt_entry(header);
 522
 523         if (intsrc->source_irq == acpi_gbl_FADT.sci_interrupt) {
 524                 acpi_sci_ioapic_setup(intsrc->source_irq,
 525                                       intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
 526                                       (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2,
 527                                       intsrc->global_irq);
 528                 return 0;
 529         }
 530
 531         if (intsrc->source_irq == 0) {
 532                 if (acpi_skip_timer_override) {
 533                         printk(PREFIX "BIOS IRQ0 override ignored.\n");
 534                         return 0;
 535                 }
 536
 537                 if ((intsrc->global_irq == 2) && acpi_fix_pin2_polarity
 538                         && (intsrc->inti_flags & ACPI_MADT_POLARITY_MASK)) {
 539                         intsrc->inti_flags &= ~ACPI_MADT_POLARITY_MASK;
 540                         printk(PREFIX "BIOS IRQ0 pin2 override: forcing polarity to high active.\n");
 541                 }
 542         }
 543
 544         mp_override_legacy_irq(intsrc->source_irq,
 545                                 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
 546                                 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2,
 547                                 intsrc->global_irq);
 548
 549         return 0;
 550 }
 551
 552 static int __init
 553 acpi_parse_nmi_src(struct acpi_subtable_header * header, const unsigned long end)
 554 {
 555         struct acpi_madt_nmi_source *nmi_src = NULL;
 556
 557         nmi_src = (struct acpi_madt_nmi_source *)header;
 558
 559         if (BAD_MADT_ENTRY(nmi_src, end))
 560                 return -EINVAL;
 561
 562         acpi_table_print_madt_entry(header);
 563
 564         /* TBD: Support nimsrc entries? */
 565
 566         return 0;
 567 }
 568
 569 #endif                          /* CONFIG_X86_IO_APIC */
 570
 571 /*
 572  * acpi_pic_sci_set_trigger()
 573  *
 574  * use ELCR to set PIC-mode trigger type for SCI
 575  *
 576  * If a PIC-mode SCI is not recognized or gives spurious IRQ7's
 577  * it may require Edge Trigger -- use "acpi_sci=edge"
 578  *
 579  * Port 0x4d0-4d1 are ECLR1 and ECLR2, the Edge/Level Control Registers
 580  * for the 8259 PIC.  bit[n] = 1 means irq[n] is Level, otherwise Edge.
 581  * ECLR1 is IRQs 0-7 (IRQ 0, 1, 2 must be 0)
 582  * ECLR2 is IRQs 8-15 (IRQ 8, 13 must be 0)
 583  */
 584
 585 void __init acpi_pic_sci_set_trigger(unsigned int irq, u16 trigger)
 586 {
 587         unsigned int mask = 1 << irq;
 588         unsigned int old, new;
 589
 590         /* Real old ELCR mask */
 591         old = inb(0x4d0) | (inb(0x4d1) << 8);
 592
 593         /*
 594          * If we use ACPI to set PCI IRQs, then we should clear ELCR
 595          * since we will set it correctly as we enable the PCI irq
 596          * routing.
 597          */
 598         new = acpi_noirq ? old : 0;
 599
 600         /*
 601          * Update SCI information in the ELCR, it isn't in the PCI
 602          * routing tables..
 603          */
 604         switch (trigger) {
 605         case 1:         /* Edge - clear */
 606                 new &= ~mask;
 607                 break;
 608         case 3:         /* Level - set */
 609                 new |= mask;
 610                 break;
 611         }
 612
 613         if (old == new)
 614                 return;
 615
 616         printk(PREFIX "setting ELCR to %04x (from %04x)\n", new, old);
 617         outb(new, 0x4d0);
 618         outb(new >> 8, 0x4d1);
 619 }
 620
 621 int acpi_gsi_to_irq(u32 gsi, unsigned int *irqp)
 622 {
 623         int rc, irq, trigger, polarity;
 624
 625         if (acpi_irq_model == ACPI_IRQ_MODEL_PIC) {
 626                 *irqp = gsi;
 627                 return 0;
 628         }
 629
 630         rc = acpi_get_override_irq(gsi, &trigger, &polarity);
 631         if (rc)
 632                 return rc;
 633
 634         trigger = trigger ? ACPI_LEVEL_SENSITIVE : ACPI_EDGE_SENSITIVE;
 635         polarity = polarity ? ACPI_ACTIVE_LOW : ACPI_ACTIVE_HIGH;
 636         irq = acpi_register_gsi(NULL, gsi, trigger, polarity);
 637         if (irq < 0)
 638                 return irq;
 639
 640         *irqp = irq;
 641         return 0;
 642 }
 643 EXPORT_SYMBOL_GPL(acpi_gsi_to_irq);
 644
 645 int acpi_isa_irq_to_gsi(unsigned isa_irq, u32 *gsi)
 646 {
 647         if (isa_irq < nr_legacy_irqs() &&
 648             isa_irq_to_gsi[isa_irq] != INVALID_ACPI_IRQ) {
 649                 *gsi = isa_irq_to_gsi[isa_irq];
 650                 return 0;
 651         }
 652
 653         return -1;
 654 }
 655
 656 static int acpi_register_gsi_pic(struct device *dev, u32 gsi,
 657                                  int trigger, int polarity)
 658 {
 659 #ifdef CONFIG_PCI
 660         /*
 661          * Make sure all (legacy) PCI IRQs are set as level-triggered.
 662          */
 663         if (trigger == ACPI_LEVEL_SENSITIVE)
 664                 elcr_set_level_irq(gsi);
 665 #endif
 666
 667         return gsi;
 668 }
 669
 670 #ifdef CONFIG_X86_LOCAL_APIC
 671 static int acpi_register_gsi_ioapic(struct device *dev, u32 gsi,
 672                                     int trigger, int polarity)
 673 {
 674         int irq = gsi;
 675 #ifdef CONFIG_X86_IO_APIC
 676         int node;
 677         struct irq_alloc_info info;
 678
 679         node = dev ? dev_to_node(dev) : NUMA_NO_NODE;
 680         trigger = trigger == ACPI_EDGE_SENSITIVE ? 0 : 1;
 681         polarity = polarity == ACPI_ACTIVE_HIGH ? 0 : 1;
 682         ioapic_set_alloc_attr(&info, node, trigger, polarity);
 683
 684         mutex_lock(&acpi_ioapic_lock);
 685         irq = mp_map_gsi_to_irq(gsi, IOAPIC_MAP_ALLOC, &info);
 686         /* Don't set up the ACPI SCI because it's already set up */
 687         if (irq >= 0 && enable_update_mptable && gsi != acpi_gbl_FADT.sci_interrupt)
 688                 mp_config_acpi_gsi(dev, gsi, trigger, polarity);
 689         mutex_unlock(&acpi_ioapic_lock);
 690 #endif
 691
 692         return irq;
 693 }
 694
 695 static void acpi_unregister_gsi_ioapic(u32 gsi)
 696 {
 697 #ifdef CONFIG_X86_IO_APIC
 698         int irq;
 699
 700         mutex_lock(&acpi_ioapic_lock);
 701         irq = mp_map_gsi_to_irq(gsi, 0, NULL);
 702         if (irq > 0)
 703                 mp_unmap_irq(irq);
 704         mutex_unlock(&acpi_ioapic_lock);
 705 #endif
 706 }
 707 #endif
 708
 709 int (*__acpi_register_gsi)(struct device *dev, u32 gsi,
 710                            int trigger, int polarity) = acpi_register_gsi_pic;
 711 void (*__acpi_unregister_gsi)(u32 gsi) = NULL;
 712
 713 #ifdef CONFIG_ACPI_SLEEP
 714 int (*acpi_suspend_lowlevel)(void) = x86_acpi_suspend_lowlevel;
 715 #else
 716 int (*acpi_suspend_lowlevel)(void);
 717 #endif
 718
 719 /*
 720  * success: return IRQ number (>=0)
 721  * failure: return < 0
 722  */
 723 int acpi_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity)
 724 {
 725         return __acpi_register_gsi(dev, gsi, trigger, polarity);
 726 }
 727 EXPORT_SYMBOL_GPL(acpi_register_gsi);
 728
 729 void acpi_unregister_gsi(u32 gsi)
 730 {
 731         if (__acpi_unregister_gsi)
 732                 __acpi_unregister_gsi(gsi);
 733 }
 734 EXPORT_SYMBOL_GPL(acpi_unregister_gsi);
 735
 736 #ifdef CONFIG_X86_LOCAL_APIC
 737 static void __init acpi_set_irq_model_ioapic(void)
 738 {
 739         acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC;
 740         __acpi_register_gsi = acpi_register_gsi_ioapic;
 741         __acpi_unregister_gsi = acpi_unregister_gsi_ioapic;
 742         acpi_ioapic = 1;
 743 }
 744 #endif
 745
 746 /*
 747  *  ACPI based hotplug support for CPU
 748  */
 749 #ifdef CONFIG_ACPI_HOTPLUG_CPU
 750 #include <acpi/processor.h>
 751
 752 static int acpi_map_cpu2node(acpi_handle handle, int cpu, int physid)
 753 {
 754 #ifdef CONFIG_ACPI_NUMA
 755         int nid;
 756
 757         nid = acpi_get_node(handle);
 758         if (nid != NUMA_NO_NODE) {
 759                 set_apicid_to_node(physid, nid);
 760                 numa_set_node(cpu, nid);
 761         }
 762 #endif
 763         return 0;
 764 }
 765
 766 int acpi_map_cpu(acpi_handle handle, phys_cpuid_t physid, u32 acpi_id,
 767                  int *pcpu)
 768 {
 769         int cpu;
 770
 771         cpu = acpi_register_lapic(physid, acpi_id, ACPI_MADT_ENABLED);
 772         if (cpu < 0) {
 773                 pr_info(PREFIX "Unable to map lapic to logical cpu number\n");
 774                 return cpu;
 775         }
 776
 777         acpi_processor_set_pdc(handle);
 778         acpi_map_cpu2node(handle, cpu, physid);
 779
 780         *pcpu = cpu;
 781         return 0;
 782 }
 783 EXPORT_SYMBOL(acpi_map_cpu);
 784
 785 int acpi_unmap_cpu(int cpu)
 786 {
 787 #ifdef CONFIG_ACPI_NUMA
 788         set_apicid_to_node(per_cpu(x86_cpu_to_apicid, cpu), NUMA_NO_NODE);
 789 #endif
 790
 791         per_cpu(x86_cpu_to_apicid, cpu) = -1;
 792         set_cpu_present(cpu, false);
 793         num_processors--;
 794
 795         return (0);
 796 }
 797 EXPORT_SYMBOL(acpi_unmap_cpu);
 798 #endif                          /* CONFIG_ACPI_HOTPLUG_CPU */
 799
 800 int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base)
 801 {
 802         int ret = -ENOSYS;
 803 #ifdef CONFIG_ACPI_HOTPLUG_IOAPIC
 804         int ioapic_id;
 805         u64 addr;
 806         struct ioapic_domain_cfg cfg = {
 807                 .type = IOAPIC_DOMAIN_DYNAMIC,
 808                 .ops = &mp_ioapic_irqdomain_ops,
 809         };
 810
 811         ioapic_id = acpi_get_ioapic_id(handle, gsi_base, &addr);
 812         if (ioapic_id < 0) {
 813                 unsigned long long uid;
 814                 acpi_status status;
 815
 816                 status = acpi_evaluate_integer(handle, METHOD_NAME__UID,
 817                                                NULL, &uid);
 818                 if (ACPI_FAILURE(status)) {
 819                         acpi_handle_warn(handle, "failed to get IOAPIC ID.\n");
 820                         return -EINVAL;
 821                 }
 822                 ioapic_id = (int)uid;
 823         }
 824
 825         mutex_lock(&acpi_ioapic_lock);
 826         ret  = mp_register_ioapic(ioapic_id, phys_addr, gsi_base, &cfg);
 827         mutex_unlock(&acpi_ioapic_lock);
 828 #endif
 829
 830         return ret;
 831 }
 832 EXPORT_SYMBOL(acpi_register_ioapic);
 833
 834 int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base)
 835 {
 836         int ret = -ENOSYS;
 837
 838 #ifdef CONFIG_ACPI_HOTPLUG_IOAPIC
 839         mutex_lock(&acpi_ioapic_lock);
 840         ret  = mp_unregister_ioapic(gsi_base);
 841         mutex_unlock(&acpi_ioapic_lock);
 842 #endif
 843
 844         return ret;
 845 }
 846 EXPORT_SYMBOL(acpi_unregister_ioapic);
 847
 848 /**
 849  * acpi_ioapic_registered - Check whether IOAPIC assoicatied with @gsi_base
 850  *                          has been registered
 851  * @handle:     ACPI handle of the IOAPIC device
 852  * @gsi_base:   GSI base associated with the IOAPIC
 853  *
 854  * Assume caller holds some type of lock to serialize acpi_ioapic_registered()
 855  * with acpi_register_ioapic()/acpi_unregister_ioapic().
 856  */
 857 int acpi_ioapic_registered(acpi_handle handle, u32 gsi_base)
 858 {
 859         int ret = 0;
 860
 861 #ifdef CONFIG_ACPI_HOTPLUG_IOAPIC
 862         mutex_lock(&acpi_ioapic_lock);
 863         ret  = mp_ioapic_registered(gsi_base);
 864         mutex_unlock(&acpi_ioapic_lock);
 865 #endif
 866
 867         return ret;
 868 }
 869
 870 static int __init acpi_parse_sbf(struct acpi_table_header *table)
 871 {
 872         struct acpi_table_boot *sb = (struct acpi_table_boot *)table;
 873
 874         sbf_port = sb->cmos_index;      /* Save CMOS port */
 875
 876         return 0;
 877 }
 878
 879 #ifdef CONFIG_HPET_TIMER
 880 #include <asm/hpet.h>
 881
 882 static struct resource *hpet_res __initdata;
 883
 884 static int __init acpi_parse_hpet(struct acpi_table_header *table)
 885 {
 886         struct acpi_table_hpet *hpet_tbl = (struct acpi_table_hpet *)table;
 887
 888         if (hpet_tbl->address.space_id != ACPI_SPACE_MEM) {
 889                 printk(KERN_WARNING PREFIX "HPET timers must be located in "
 890                        "memory.\n");
 891                 return -1;
 892         }
 893
 894         hpet_address = hpet_tbl->address.address;
 895         hpet_blockid = hpet_tbl->sequence;
 896
 897         /*
 898          * Some broken BIOSes advertise HPET at 0x0. We really do not
 899          * want to allocate a resource there.
 900          */
 901         if (!hpet_address) {
 902                 printk(KERN_WARNING PREFIX
 903                        "HPET id: %#x base: %#lx is invalid\n",
 904                        hpet_tbl->id, hpet_address);
 905                 return 0;
 906         }
 907 #ifdef CONFIG_X86_64
 908         /*
 909          * Some even more broken BIOSes advertise HPET at
 910          * 0xfed0000000000000 instead of 0xfed00000. Fix it up and add
 911          * some noise:
 912          */
 913         if (hpet_address == 0xfed0000000000000UL) {
 914                 if (!hpet_force_user) {
 915                         printk(KERN_WARNING PREFIX "HPET id: %#x "
 916                                "base: 0xfed0000000000000 is bogus\n "
 917                                "try hpet=force on the kernel command line to "
 918                                "fix it up to 0xfed00000.\n", hpet_tbl->id);
 919                         hpet_address = 0;
 920                         return 0;
 921                 }
 922                 printk(KERN_WARNING PREFIX
 923                        "HPET id: %#x base: 0xfed0000000000000 fixed up "
 924                        "to 0xfed00000.\n", hpet_tbl->id);
 925                 hpet_address >>= 32;
 926         }
 927 #endif
 928         printk(KERN_INFO PREFIX "HPET id: %#x base: %#lx\n",
 929                hpet_tbl->id, hpet_address);
 930
 931         /*
 932          * Allocate and initialize the HPET firmware resource for adding into
 933          * the resource tree during the lateinit timeframe.
 934          */
 935 #define HPET_RESOURCE_NAME_SIZE 9
 936         hpet_res = memblock_alloc(sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE,
 937                                   SMP_CACHE_BYTES);
 938         if (!hpet_res)
 939                 panic("%s: Failed to allocate %zu bytes\n", __func__,
 940                       sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE);
 941
 942         hpet_res->name = (void *)&hpet_res[1];
 943         hpet_res->flags = IORESOURCE_MEM;
 944         snprintf((char *)hpet_res->name, HPET_RESOURCE_NAME_SIZE, "HPET %u",
 945                  hpet_tbl->sequence);
 946
 947         hpet_res->start = hpet_address;
 948         hpet_res->end = hpet_address + (1 * 1024) - 1;
 949
 950         return 0;
 951 }
 952
 953 /*
 954  * hpet_insert_resource inserts the HPET resources used into the resource
 955  * tree.
 956  */
 957 static __init int hpet_insert_resource(void)
 958 {
 959         if (!hpet_res)
 960                 return 1;
 961
 962         return insert_resource(&iomem_resource, hpet_res);
 963 }
 964
 965 late_initcall(hpet_insert_resource);
 966
 967 #else
 968 #define acpi_parse_hpet NULL
 969 #endif
 970
 971 static int __init acpi_parse_fadt(struct acpi_table_header *table)
 972 {
 973         if (!(acpi_gbl_FADT.boot_flags & ACPI_FADT_LEGACY_DEVICES)) {
 974                 pr_debug("ACPI: no legacy devices present\n");
 975                 x86_platform.legacy.devices.pnpbios = 0;
 976         }
 977
 978         if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID &&
 979             !(acpi_gbl_FADT.boot_flags & ACPI_FADT_8042) &&
 980             x86_platform.legacy.i8042 != X86_LEGACY_I8042_PLATFORM_ABSENT) {
 981                 pr_debug("ACPI: i8042 controller is absent\n");
 982                 x86_platform.legacy.i8042 = X86_LEGACY_I8042_FIRMWARE_ABSENT;
 983         }
 984
 985         if (acpi_gbl_FADT.boot_flags & ACPI_FADT_NO_CMOS_RTC) {
 986                 pr_debug("ACPI: not registering RTC platform device\n");
 987                 x86_platform.legacy.rtc = 0;
 988         }
 989
 990         if (acpi_gbl_FADT.boot_flags & ACPI_FADT_NO_VGA) {
 991                 pr_debug("ACPI: probing for VGA not safe\n");
 992                 x86_platform.legacy.no_vga = 1;
 993         }
 994
 995 #ifdef CONFIG_X86_PM_TIMER
 996         /* detect the location of the ACPI PM Timer */
 997         if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID) {
 998                 /* FADT rev. 2 */
 999                 if (acpi_gbl_FADT.xpm_timer_block.space_id !=
1000                     ACPI_ADR_SPACE_SYSTEM_IO)
1001                         return 0;
1002
1003                 pmtmr_ioport = acpi_gbl_FADT.xpm_timer_block.address;
1004                 /*
1005                  * "X" fields are optional extensions to the original V1.0
1006                  * fields, so we must selectively expand V1.0 fields if the
1007                  * corresponding X field is zero.
1008                  */
1009                 if (!pmtmr_ioport)
1010                         pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
1011         } else {
1012                 /* FADT rev. 1 */
1013                 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
1014         }
1015         if (pmtmr_ioport)
1016                 printk(KERN_INFO PREFIX "PM-Timer IO Port: %#x\n",
1017                        pmtmr_ioport);
1018 #endif
1019         return 0;
1020 }
1021
1022 #ifdef  CONFIG_X86_LOCAL_APIC
1023 /*
1024  * Parse LAPIC entries in MADT
1025  * returns 0 on success, < 0 on error
1026  */
1027
1028 static int __init early_acpi_parse_madt_lapic_addr_ovr(void)
1029 {
1030         int count;
1031
1032         if (!boot_cpu_has(X86_FEATURE_APIC))
1033                 return -ENODEV;
1034
1035         /*
1036          * Note that the LAPIC address is obtained from the MADT (32-bit value)
1037          * and (optionally) overridden by a LAPIC_ADDR_OVR entry (64-bit value).
1038          */
1039
1040         count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
1041                                       acpi_parse_lapic_addr_ovr, 0);
1042         if (count < 0) {
1043                 printk(KERN_ERR PREFIX
1044                        "Error parsing LAPIC address override entry\n");
1045                 return count;
1046         }
1047
1048         register_lapic_address(acpi_lapic_addr);
1049
1050         return count;
1051 }
1052
1053 static int __init acpi_parse_madt_lapic_entries(void)
1054 {
1055         int count;
1056         int x2count = 0;
1057         int ret;
1058         struct acpi_subtable_proc madt_proc[2];
1059
1060         if (!boot_cpu_has(X86_FEATURE_APIC))
1061                 return -ENODEV;
1062
1063         count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC,
1064                                       acpi_parse_sapic, MAX_LOCAL_APIC);
1065
1066         if (!count) {
1067                 memset(madt_proc, 0, sizeof(madt_proc));
1068                 madt_proc[0].id = ACPI_MADT_TYPE_LOCAL_APIC;
1069                 madt_proc[0].handler = acpi_parse_lapic;
1070                 madt_proc[1].id = ACPI_MADT_TYPE_LOCAL_X2APIC;
1071                 madt_proc[1].handler = acpi_parse_x2apic;
1072                 ret = acpi_table_parse_entries_array(ACPI_SIG_MADT,
1073                                 sizeof(struct acpi_table_madt),
1074                                 madt_proc, ARRAY_SIZE(madt_proc), MAX_LOCAL_APIC);
1075                 if (ret < 0) {
1076                         printk(KERN_ERR PREFIX
1077                                         "Error parsing LAPIC/X2APIC entries\n");
1078                         return ret;
1079                 }
1080
1081                 count = madt_proc[0].count;
1082                 x2count = madt_proc[1].count;
1083         }
1084         if (!count && !x2count) {
1085                 printk(KERN_ERR PREFIX "No LAPIC entries present\n");
1086                 /* TBD: Cleanup to allow fallback to MPS */
1087                 return -ENODEV;
1088         } else if (count < 0 || x2count < 0) {
1089                 printk(KERN_ERR PREFIX "Error parsing LAPIC entry\n");
1090                 /* TBD: Cleanup to allow fallback to MPS */
1091                 return count;
1092         }
1093
1094         x2count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC_NMI,
1095                                         acpi_parse_x2apic_nmi, 0);
1096         count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI,
1097                                       acpi_parse_lapic_nmi, 0);
1098         if (count < 0 || x2count < 0) {
1099                 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n");
1100                 /* TBD: Cleanup to allow fallback to MPS */
1101                 return count;
1102         }
1103         return 0;
1104 }
1105 #endif                          /* CONFIG_X86_LOCAL_APIC */
1106
1107 #ifdef  CONFIG_X86_IO_APIC
1108 static void __init mp_config_acpi_legacy_irqs(void)
1109 {
1110         int i;
1111         struct mpc_intsrc mp_irq;
1112
1113 #ifdef CONFIG_EISA
1114         /*
1115          * Fabricate the legacy ISA bus (bus #31).
1116          */
1117         mp_bus_id_to_type[MP_ISA_BUS] = MP_BUS_ISA;
1118 #endif
1119         set_bit(MP_ISA_BUS, mp_bus_not_pci);
1120         pr_debug("Bus #%d is ISA (nIRQs: %d)\n", MP_ISA_BUS, nr_legacy_irqs());
1121
1122         /*
1123          * Use the default configuration for the IRQs 0-15.  Unless
1124          * overridden by (MADT) interrupt source override entries.
1125          */
1126         for (i = 0; i < nr_legacy_irqs(); i++) {
1127                 int ioapic, pin;
1128                 unsigned int dstapic;
1129                 int idx;
1130                 u32 gsi;
1131
1132                 /* Locate the gsi that irq i maps to. */
1133                 if (acpi_isa_irq_to_gsi(i, &gsi))
1134                         continue;
1135
1136                 /*
1137                  * Locate the IOAPIC that manages the ISA IRQ.
1138                  */
1139                 ioapic = mp_find_ioapic(gsi);
1140                 if (ioapic < 0)
1141                         continue;
1142                 pin = mp_find_ioapic_pin(ioapic, gsi);
1143                 dstapic = mpc_ioapic_id(ioapic);
1144
1145                 for (idx = 0; idx < mp_irq_entries; idx++) {
1146                         struct mpc_intsrc *irq = mp_irqs + idx;
1147
1148                         /* Do we already have a mapping for this ISA IRQ? */
1149                         if (irq->srcbus == MP_ISA_BUS && irq->srcbusirq == i)
1150                                 break;
1151
1152                         /* Do we already have a mapping for this IOAPIC pin */
1153                         if (irq->dstapic == dstapic && irq->dstirq == pin)
1154                                 break;
1155                 }
1156
1157                 if (idx != mp_irq_entries) {
1158                         printk(KERN_DEBUG "ACPI: IRQ%d used by override.\n", i);
1159                         continue;       /* IRQ already used */
1160                 }
1161
1162                 mp_irq.type = MP_INTSRC;
1163                 mp_irq.irqflag = 0;     /* Conforming */
1164                 mp_irq.srcbus = MP_ISA_BUS;
1165                 mp_irq.dstapic = dstapic;
1166                 mp_irq.irqtype = mp_INT;
1167                 mp_irq.srcbusirq = i; /* Identity mapped */
1168                 mp_irq.dstirq = pin;
1169
1170                 mp_save_irq(&mp_irq);
1171         }
1172 }
1173
1174 /*
1175  * Parse IOAPIC related entries in MADT
1176  * returns 0 on success, < 0 on error
1177  */
1178 static int __init acpi_parse_madt_ioapic_entries(void)
1179 {
1180         int count;
1181
1182         /*
1183          * ACPI interpreter is required to complete interrupt setup,
1184          * so if it is off, don't enumerate the io-apics with ACPI.
1185          * If MPS is present, it will handle them,
1186          * otherwise the system will stay in PIC mode
1187          */
1188         if (acpi_disabled || acpi_noirq)
1189                 return -ENODEV;
1190
1191         if (!boot_cpu_has(X86_FEATURE_APIC))
1192                 return -ENODEV;
1193
1194         /*
1195          * if "noapic" boot option, don't look for IO-APICs
1196          */
1197         if (skip_ioapic_setup) {
1198                 printk(KERN_INFO PREFIX "Skipping IOAPIC probe "
1199                        "due to 'noapic' option.\n");
1200                 return -ENODEV;
1201         }
1202
1203         count = acpi_table_parse_madt(ACPI_MADT_TYPE_IO_APIC, acpi_parse_ioapic,
1204                                       MAX_IO_APICS);
1205         if (!count) {
1206                 printk(KERN_ERR PREFIX "No IOAPIC entries present\n");
1207                 return -ENODEV;
1208         } else if (count < 0) {
1209                 printk(KERN_ERR PREFIX "Error parsing IOAPIC entry\n");
1210                 return count;
1211         }
1212
1213         count = acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE,
1214                                       acpi_parse_int_src_ovr, nr_irqs);
1215         if (count < 0) {
1216                 printk(KERN_ERR PREFIX
1217                        "Error parsing interrupt source overrides entry\n");
1218                 /* TBD: Cleanup to allow fallback to MPS */
1219                 return count;
1220         }
1221
1222         /*
1223          * If BIOS did not supply an INT_SRC_OVR for the SCI
1224          * pretend we got one so we can set the SCI flags.
1225          * But ignore setting up SCI on hardware reduced platforms.
1226          */
1227         if (acpi_sci_override_gsi == INVALID_ACPI_IRQ && !acpi_gbl_reduced_hardware)
1228                 acpi_sci_ioapic_setup(acpi_gbl_FADT.sci_interrupt, 0, 0,
1229                                       acpi_gbl_FADT.sci_interrupt);
1230
1231         /* Fill in identity legacy mappings where no override */
1232         mp_config_acpi_legacy_irqs();
1233
1234         count = acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE,
1235                                       acpi_parse_nmi_src, nr_irqs);
1236         if (count < 0) {
1237                 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n");
1238                 /* TBD: Cleanup to allow fallback to MPS */
1239                 return count;
1240         }
1241
1242         return 0;
1243 }
1244 #else
1245 static inline int acpi_parse_madt_ioapic_entries(void)
1246 {
1247         return -1;
1248 }
1249 #endif  /* !CONFIG_X86_IO_APIC */
1250
1251 static void __init early_acpi_process_madt(void)
1252 {
1253 #ifdef CONFIG_X86_LOCAL_APIC
1254         int error;
1255
1256         if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1257
1258                 /*
1259                  * Parse MADT LAPIC entries
1260                  */
1261                 error = early_acpi_parse_madt_lapic_addr_ovr();
1262                 if (!error) {
1263                         acpi_lapic = 1;
1264                         smp_found_config = 1;
1265                 }
1266                 if (error == -EINVAL) {
1267                         /*
1268                          * Dell Precision Workstation 410, 610 come here.
1269                          */
1270                         printk(KERN_ERR PREFIX
1271                                "Invalid BIOS MADT, disabling ACPI\n");
1272                         disable_acpi();
1273                 }
1274         }
1275 #endif
1276 }
1277
1278 static void __init acpi_process_madt(void)
1279 {
1280 #ifdef CONFIG_X86_LOCAL_APIC
1281         int error;
1282
1283         if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1284
1285                 /*
1286                  * Parse MADT LAPIC entries
1287                  */
1288                 error = acpi_parse_madt_lapic_entries();
1289                 if (!error) {
1290                         acpi_lapic = 1;
1291
1292                         /*
1293                          * Parse MADT IO-APIC entries
1294                          */
1295                         mutex_lock(&acpi_ioapic_lock);
1296                         error = acpi_parse_madt_ioapic_entries();
1297                         mutex_unlock(&acpi_ioapic_lock);
1298                         if (!error) {
1299                                 acpi_set_irq_model_ioapic();
1300
1301                                 smp_found_config = 1;
1302                         }
1303                 }
1304                 if (error == -EINVAL) {
1305                         /*
1306                          * Dell Precision Workstation 410, 610 come here.
1307                          */
1308                         printk(KERN_ERR PREFIX
1309                                "Invalid BIOS MADT, disabling ACPI\n");
1310                         disable_acpi();
1311                 }
1312         } else {
1313                 /*
1314                  * ACPI found no MADT, and so ACPI wants UP PIC mode.
1315                  * In the event an MPS table was found, forget it.
1316                  * Boot with "acpi=off" to use MPS on such a system.
1317                  */
1318                 if (smp_found_config) {
1319                         printk(KERN_WARNING PREFIX
1320                                 "No APIC-table, disabling MPS\n");
1321                         smp_found_config = 0;
1322                 }
1323         }
1324
1325         /*
1326          * ACPI supports both logical (e.g. Hyper-Threading) and physical
1327          * processors, where MPS only supports physical.
1328          */
1329         if (acpi_lapic && acpi_ioapic)
1330                 printk(KERN_INFO "Using ACPI (MADT) for SMP configuration "
1331                        "information\n");
1332         else if (acpi_lapic)
1333                 printk(KERN_INFO "Using ACPI for processor (LAPIC) "
1334                        "configuration information\n");
1335 #endif
1336         return;
1337 }
1338
1339 static int __init disable_acpi_irq(const struct dmi_system_id *d)
1340 {
1341         if (!acpi_force) {
1342                 printk(KERN_NOTICE "%s detected: force use of acpi=noirq\n",
1343                        d->ident);
1344                 acpi_noirq_set();
1345         }
1346         return 0;
1347 }
1348
1349 static int __init disable_acpi_pci(const struct dmi_system_id *d)
1350 {
1351         if (!acpi_force) {
1352                 printk(KERN_NOTICE "%s detected: force use of pci=noacpi\n",
1353                        d->ident);
1354                 acpi_disable_pci();
1355         }
1356         return 0;
1357 }
1358
1359 static int __init dmi_disable_acpi(const struct dmi_system_id *d)
1360 {
1361         if (!acpi_force) {
1362                 printk(KERN_NOTICE "%s detected: acpi off\n", d->ident);
1363                 disable_acpi();
1364         } else {
1365                 printk(KERN_NOTICE
1366                        "Warning: DMI blacklist says broken, but acpi forced\n");
1367         }
1368         return 0;
1369 }
1370
1371 /*
1372  * Force ignoring BIOS IRQ0 override
1373  */
1374 static int __init dmi_ignore_irq0_timer_override(const struct dmi_system_id *d)
1375 {
1376         if (!acpi_skip_timer_override) {
1377                 pr_notice("%s detected: Ignoring BIOS IRQ0 override\n",
1378                         d->ident);
1379                 acpi_skip_timer_override = 1;
1380         }
1381         return 0;
1382 }
1383
1384 /*
1385  * ACPI offers an alternative platform interface model that removes
1386  * ACPI hardware requirements for platforms that do not implement
1387  * the PC Architecture.
1388  *
1389  * We initialize the Hardware-reduced ACPI model here:
1390  */
1391 void __init acpi_generic_reduced_hw_init(void)
1392 {
1393         /*
1394          * Override x86_init functions and bypass legacy PIC in
1395          * hardware reduced ACPI mode.
1396          */
1397         x86_init.timers.timer_init      = x86_init_noop;
1398         x86_init.irqs.pre_vector_init   = x86_init_noop;
1399         legacy_pic                      = &null_legacy_pic;
1400 }
1401
1402 static void __init acpi_reduced_hw_init(void)
1403 {
1404         if (acpi_gbl_reduced_hardware)
1405                 x86_init.acpi.reduced_hw_early_init();
1406 }
1407
1408 /*
1409  * If your system is blacklisted here, but you find that acpi=force
1410  * works for you, please contact linux-acpi@vger.kernel.org
1411  */
1412 static const struct dmi_system_id acpi_dmi_table[] __initconst = {
1413         /*
1414          * Boxes that need ACPI disabled
1415          */
1416         {
1417          .callback = dmi_disable_acpi,
1418          .ident = "IBM Thinkpad",
1419          .matches = {
1420                      DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1421                      DMI_MATCH(DMI_BOARD_NAME, "2629H1G"),
1422                      },
1423          },
1424
1425         /*
1426          * Boxes that need ACPI PCI IRQ routing disabled
1427          */
1428         {
1429          .callback = disable_acpi_irq,
1430          .ident = "ASUS A7V",
1431          .matches = {
1432                      DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC"),
1433                      DMI_MATCH(DMI_BOARD_NAME, "<A7V>"),
1434                      /* newer BIOS, Revision 1011, does work */
1435                      DMI_MATCH(DMI_BIOS_VERSION,
1436                                "ASUS A7V ACPI BIOS Revision 1007"),
1437                      },
1438          },
1439         {
1440                 /*
1441                  * Latest BIOS for IBM 600E (1.16) has bad pcinum
1442                  * for LPC bridge, which is needed for the PCI
1443                  * interrupt links to work. DSDT fix is in bug 5966.
1444                  * 2645, 2646 model numbers are shared with 600/600E/600X
1445                  */
1446          .callback = disable_acpi_irq,
1447          .ident = "IBM Thinkpad 600 Series 2645",
1448          .matches = {
1449                      DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1450                      DMI_MATCH(DMI_BOARD_NAME, "2645"),
1451                      },
1452          },
1453         {
1454          .callback = disable_acpi_irq,
1455          .ident = "IBM Thinkpad 600 Series 2646",
1456          .matches = {
1457                      DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1458                      DMI_MATCH(DMI_BOARD_NAME, "2646"),
1459                      },
1460          },
1461         /*
1462          * Boxes that need ACPI PCI IRQ routing and PCI scan disabled
1463          */
1464         {                       /* _BBN 0 bug */
1465          .callback = disable_acpi_pci,
1466          .ident = "ASUS PR-DLS",
1467          .matches = {
1468                      DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1469                      DMI_MATCH(DMI_BOARD_NAME, "PR-DLS"),
1470                      DMI_MATCH(DMI_BIOS_VERSION,
1471                                "ASUS PR-DLS ACPI BIOS Revision 1010"),
1472                      DMI_MATCH(DMI_BIOS_DATE, "03/21/2003")
1473                      },
1474          },
1475         {
1476          .callback = disable_acpi_pci,
1477          .ident = "Acer TravelMate 36x Laptop",
1478          .matches = {
1479                      DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
1480                      DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"),
1481                      },
1482          },
1483         {}
1484 };
1485
1486 /* second table for DMI checks that should run after early-quirks */
1487 static const struct dmi_system_id acpi_dmi_table_late[] __initconst = {
1488         /*
1489          * HP laptops which use a DSDT reporting as HP/SB400/10000,
1490          * which includes some code which overrides all temperature
1491          * trip points to 16C if the INTIN2 input of the I/O APIC
1492          * is enabled.  This input is incorrectly designated the
1493          * ISA IRQ 0 via an interrupt source override even though
1494          * it is wired to the output of the master 8259A and INTIN0
1495          * is not connected at all.  Force ignoring BIOS IRQ0
1496          * override in that cases.
1497          */
1498         {
1499          .callback = dmi_ignore_irq0_timer_override,
1500          .ident = "HP nx6115 laptop",
1501          .matches = {
1502                      DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1503                      DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6115"),
1504                      },
1505          },
1506         {
1507          .callback = dmi_ignore_irq0_timer_override,
1508          .ident = "HP NX6125 laptop",
1509          .matches = {
1510                      DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1511                      DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6125"),
1512                      },
1513          },
1514         {
1515          .callback = dmi_ignore_irq0_timer_override,
1516          .ident = "HP NX6325 laptop",
1517          .matches = {
1518                      DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1519                      DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6325"),
1520                      },
1521          },
1522         {
1523          .callback = dmi_ignore_irq0_timer_override,
1524          .ident = "HP 6715b laptop",
1525          .matches = {
1526                      DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1527                      DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq 6715b"),
1528                      },
1529          },
1530         {
1531          .callback = dmi_ignore_irq0_timer_override,
1532          .ident = "FUJITSU SIEMENS",
1533          .matches = {
1534                      DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
1535                      DMI_MATCH(DMI_PRODUCT_NAME, "AMILO PRO V2030"),
1536                      },
1537          },
1538         {}
1539 };
1540
1541 /*
1542  * acpi_boot_table_init() and acpi_boot_init()
1543  *  called from setup_arch(), always.
1544  *      1. checksums all tables
1545  *      2. enumerates lapics
1546  *      3. enumerates io-apics
1547  *
1548  * acpi_table_init() is separate to allow reading SRAT without
1549  * other side effects.
1550  *
1551  * side effects of acpi_boot_init:
1552  *      acpi_lapic = 1 if LAPIC found
1553  *      acpi_ioapic = 1 if IOAPIC found
1554  *      if (acpi_lapic && acpi_ioapic) smp_found_config = 1;
1555  *      if acpi_blacklisted() acpi_disabled = 1;
1556  *      acpi_irq_model=...
1557  *      ...
1558  */
1559
1560 void __init acpi_boot_table_init(void)
1561 {
1562         dmi_check_system(acpi_dmi_table);
1563
1564         /*
1565          * If acpi_disabled, bail out
1566          */
1567         if (acpi_disabled)
1568                 return;
1569
1570         /*
1571          * Initialize the ACPI boot-time table parser.
1572          */
1573         if (acpi_table_init()) {
1574                 disable_acpi();
1575                 return;
1576         }
1577
1578         acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1579
1580         /*
1581          * blacklist may disable ACPI entirely
1582          */
1583         if (acpi_blacklisted()) {
1584                 if (acpi_force) {
1585                         printk(KERN_WARNING PREFIX "acpi=force override\n");
1586                 } else {
1587                         printk(KERN_WARNING PREFIX "Disabling ACPI support\n");
1588                         disable_acpi();
1589                         return;
1590                 }
1591         }
1592 }
1593
1594 int __init early_acpi_boot_init(void)
1595 {
1596         /*
1597          * If acpi_disabled, bail out
1598          */
1599         if (acpi_disabled)
1600                 return 1;
1601
1602         /*
1603          * Process the Multiple APIC Description Table (MADT), if present
1604          */
1605         early_acpi_process_madt();
1606
1607         /*
1608          * Hardware-reduced ACPI mode initialization:
1609          */
1610         acpi_reduced_hw_init();
1611
1612         return 0;
1613 }
1614
1615 int __init acpi_boot_init(void)
1616 {
1617         /* those are executed after early-quirks are executed */
1618         dmi_check_system(acpi_dmi_table_late);
1619
1620         /*
1621          * If acpi_disabled, bail out
1622          */
1623         if (acpi_disabled)
1624                 return 1;
1625
1626         acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1627
1628         /*
1629          * set sci_int and PM timer address
1630          */
1631         acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt);
1632
1633         /*
1634          * Process the Multiple APIC Description Table (MADT), if present
1635          */
1636         acpi_process_madt();
1637
1638         acpi_table_parse(ACPI_SIG_HPET, acpi_parse_hpet);
1639         if (IS_ENABLED(CONFIG_ACPI_BGRT))
1640                 acpi_table_parse(ACPI_SIG_BGRT, acpi_parse_bgrt);
1641
1642         if (!acpi_noirq)
1643                 x86_init.pci.init = pci_acpi_init;
1644
1645         /* Do not enable ACPI SPCR console by default */
1646         acpi_parse_spcr(earlycon_acpi_spcr_enable, false);
1647         return 0;
1648 }
1649
1650 static int __init parse_acpi(char *arg)
1651 {
1652         if (!arg)
1653                 return -EINVAL;
1654
1655         /* "acpi=off" disables both ACPI table parsing and interpreter */
1656         if (strcmp(arg, "off") == 0) {
1657                 disable_acpi();
1658         }
1659         /* acpi=force to over-ride black-list */
1660         else if (strcmp(arg, "force") == 0) {
1661                 acpi_force = 1;
1662                 acpi_disabled = 0;
1663         }
1664         /* acpi=strict disables out-of-spec workarounds */
1665         else if (strcmp(arg, "strict") == 0) {
1666                 acpi_strict = 1;
1667         }
1668         /* acpi=rsdt use RSDT instead of XSDT */
1669         else if (strcmp(arg, "rsdt") == 0) {
1670                 acpi_gbl_do_not_use_xsdt = TRUE;
1671         }
1672         /* "acpi=noirq" disables ACPI interrupt routing */
1673         else if (strcmp(arg, "noirq") == 0) {
1674                 acpi_noirq_set();
1675         }
1676         /* "acpi=copy_dsdt" copys DSDT */
1677         else if (strcmp(arg, "copy_dsdt") == 0) {
1678                 acpi_gbl_copy_dsdt_locally = 1;
1679         }
1680         /* "acpi=nocmcff" disables FF mode for corrected errors */
1681         else if (strcmp(arg, "nocmcff") == 0) {
1682                 acpi_disable_cmcff = 1;
1683         } else {
1684                 /* Core will printk when we return error. */
1685                 return -EINVAL;
1686         }
1687         return 0;
1688 }
1689 early_param("acpi", parse_acpi);
1690
1691 /* FIXME: Using pci= for an ACPI parameter is a travesty. */
1692 static int __init parse_pci(char *arg)
1693 {
1694         if (arg && strcmp(arg, "noacpi") == 0)
1695                 acpi_disable_pci();
1696         return 0;
1697 }
1698 early_param("pci", parse_pci);
1699
1700 int __init acpi_mps_check(void)
1701 {
1702 #if defined(CONFIG_X86_LOCAL_APIC) && !defined(CONFIG_X86_MPPARSE)
1703 /* mptable code is not built-in*/
1704         if (acpi_disabled || acpi_noirq) {
1705                 printk(KERN_WARNING "MPS support code is not built-in.\n"
1706                        "Using acpi=off or acpi=noirq or pci=noacpi "
1707                        "may have problem\n");
1708                 return 1;
1709         }
1710 #endif
1711         return 0;
1712 }
1713
1714 #ifdef CONFIG_X86_IO_APIC
1715 static int __init parse_acpi_skip_timer_override(char *arg)
1716 {
1717         acpi_skip_timer_override = 1;
1718         return 0;
1719 }
1720 early_param("acpi_skip_timer_override", parse_acpi_skip_timer_override);
1721
1722 static int __init parse_acpi_use_timer_override(char *arg)
1723 {
1724         acpi_use_timer_override = 1;
1725         return 0;
1726 }
1727 early_param("acpi_use_timer_override", parse_acpi_use_timer_override);
1728 #endif /* CONFIG_X86_IO_APIC */
1729
1730 static int __init setup_acpi_sci(char *s)
1731 {
1732         if (!s)
1733                 return -EINVAL;
1734         if (!strcmp(s, "edge"))
1735                 acpi_sci_flags =  ACPI_MADT_TRIGGER_EDGE |
1736                         (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1737         else if (!strcmp(s, "level"))
1738                 acpi_sci_flags = ACPI_MADT_TRIGGER_LEVEL |
1739                         (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1740         else if (!strcmp(s, "high"))
1741                 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_HIGH |
1742                         (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1743         else if (!strcmp(s, "low"))
1744                 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_LOW |
1745                         (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1746         else
1747                 return -EINVAL;
1748         return 0;
1749 }
1750 early_param("acpi_sci", setup_acpi_sci);
1751
1752 int __acpi_acquire_global_lock(unsigned int *lock)
1753 {
1754         unsigned int old, new, val;
1755         do {
1756                 old = *lock;
1757                 new = (((old & ~0x3) + 2) + ((old >> 1) & 0x1));
1758                 val = cmpxchg(lock, old, new);
1759         } while (unlikely (val != old));
1760         return (new < 3) ? -1 : 0;
1761 }
1762
1763 int __acpi_release_global_lock(unsigned int *lock)
1764 {
1765         unsigned int old, new, val;
1766         do {
1767                 old = *lock;
1768                 new = old & ~0x3;
1769                 val = cmpxchg(lock, old, new);
1770         } while (unlikely (val != old));
1771         return old & 0x1;
1772 }
1773
1774 void __init arch_reserve_mem_area(acpi_physical_address addr, size_t size)
1775 {
1776         e820__range_add(addr, size, E820_TYPE_ACPI);
1777         e820__update_table_print();
1778 }
1779
1780 u64 x86_default_get_root_pointer(void)
1781 {
1782         return boot_params.acpi_rsdp_addr;
1783 }