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/bootmem.h>
  35 #include <linux/ioport.h>
  36 #include <linux/pci.h>
  37
  38 #include <asm/pgtable.h>
  39 #include <asm/io_apic.h>
  40 #include <asm/apic.h>
  41 #include <asm/io.h>
  42 #include <asm/mpspec.h>
  43 #include <asm/smp.h>
  44
  45 static int __initdata acpi_force = 0;
  46 u32 acpi_rsdt_forced;
  47 #ifdef  CONFIG_ACPI
  48 int acpi_disabled = 0;
  49 #else
  50 int acpi_disabled = 1;
  51 #endif
  52 EXPORT_SYMBOL(acpi_disabled);
  53
  54 #ifdef  CONFIG_X86_64
  55 # include <asm/proto.h>
  56 #endif                          /* X86 */
  57
  58 #define BAD_MADT_ENTRY(entry, end) (                                        \
  59                 (!entry) || (unsigned long)entry + sizeof(*entry) > end ||  \
  60                 ((struct acpi_subtable_header *)entry)->length < sizeof(*entry))
  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 int acpi_ht __initdata = 1;     /* enable HT */
  68
  69 int acpi_lapic;
  70 int acpi_ioapic;
  71 int acpi_strict;
  72
  73 u8 acpi_sci_flags __initdata;
  74 int acpi_sci_override_gsi __initdata;
  75 int acpi_skip_timer_override __initdata;
  76 int acpi_use_timer_override __initdata;
  77
  78 #ifdef CONFIG_X86_LOCAL_APIC
  79 static u64 acpi_lapic_addr __initdata = APIC_DEFAULT_PHYS_BASE;
  80 #endif
  81
  82 #ifndef __HAVE_ARCH_CMPXCHG
  83 #warning ACPI uses CMPXCHG, i486 and later hardware
  84 #endif
  85
  86 /* --------------------------------------------------------------------------
  87                               Boot-time Configuration
  88    -------------------------------------------------------------------------- */
  89
  90 /*
  91  * The default interrupt routing model is PIC (8259).  This gets
  92  * overridden if IOAPICs are enumerated (below).
  93  */
  94 enum acpi_irq_model_id acpi_irq_model = ACPI_IRQ_MODEL_PIC;
  95
  96
  97 /*
  98  * Temporarily use the virtual area starting from FIX_IO_APIC_BASE_END,
  99  * to map the target physical address. The problem is that set_fixmap()
 100  * provides a single page, and it is possible that the page is not
 101  * sufficient.
 102  * By using this area, we can map up to MAX_IO_APICS pages temporarily,
 103  * i.e. until the next __va_range() call.
 104  *
 105  * Important Safety Note:  The fixed I/O APIC page numbers are *subtracted*
 106  * from the fixed base.  That's why we start at FIX_IO_APIC_BASE_END and
 107  * count idx down while incrementing the phys address.
 108  */
 109 char *__init __acpi_map_table(unsigned long phys, unsigned long size)
 110 {
 111
 112         if (!phys || !size)
 113                 return NULL;
 114
 115         return early_ioremap(phys, size);
 116 }
 117 void __init __acpi_unmap_table(char *map, unsigned long size)
 118 {
 119         if (!map || !size)
 120                 return;
 121
 122         early_iounmap(map, size);
 123 }
 124
 125 #ifdef CONFIG_PCI_MMCONFIG
 126
 127 static int acpi_mcfg_64bit_base_addr __initdata = FALSE;
 128
 129 /* The physical address of the MMCONFIG aperture.  Set from ACPI tables. */
 130 struct acpi_mcfg_allocation *pci_mmcfg_config;
 131 int pci_mmcfg_config_num;
 132
 133 static int __init acpi_mcfg_oem_check(struct acpi_table_mcfg *mcfg)
 134 {
 135         if (!strcmp(mcfg->header.oem_id, "SGI"))
 136                 acpi_mcfg_64bit_base_addr = TRUE;
 137
 138         return 0;
 139 }
 140
 141 int __init acpi_parse_mcfg(struct acpi_table_header *header)
 142 {
 143         struct acpi_table_mcfg *mcfg;
 144         unsigned long i;
 145         int config_size;
 146
 147         if (!header)
 148                 return -EINVAL;
 149
 150         mcfg = (struct acpi_table_mcfg *)header;
 151
 152         /* how many config structures do we have */
 153         pci_mmcfg_config_num = 0;
 154         i = header->length - sizeof(struct acpi_table_mcfg);
 155         while (i >= sizeof(struct acpi_mcfg_allocation)) {
 156                 ++pci_mmcfg_config_num;
 157                 i -= sizeof(struct acpi_mcfg_allocation);
 158         };
 159         if (pci_mmcfg_config_num == 0) {
 160                 printk(KERN_ERR PREFIX "MMCONFIG has no entries\n");
 161                 return -ENODEV;
 162         }
 163
 164         config_size = pci_mmcfg_config_num * sizeof(*pci_mmcfg_config);
 165         pci_mmcfg_config = kmalloc(config_size, GFP_KERNEL);
 166         if (!pci_mmcfg_config) {
 167                 printk(KERN_WARNING PREFIX
 168                        "No memory for MCFG config tables\n");
 169                 return -ENOMEM;
 170         }
 171
 172         memcpy(pci_mmcfg_config, &mcfg[1], config_size);
 173
 174         acpi_mcfg_oem_check(mcfg);
 175
 176         for (i = 0; i < pci_mmcfg_config_num; ++i) {
 177                 if ((pci_mmcfg_config[i].address > 0xFFFFFFFF) &&
 178                     !acpi_mcfg_64bit_base_addr) {
 179                         printk(KERN_ERR PREFIX
 180                                "MMCONFIG not in low 4GB of memory\n");
 181                         kfree(pci_mmcfg_config);
 182                         pci_mmcfg_config_num = 0;
 183                         return -ENODEV;
 184                 }
 185         }
 186
 187         return 0;
 188 }
 189 #endif                          /* CONFIG_PCI_MMCONFIG */
 190
 191 #ifdef CONFIG_X86_LOCAL_APIC
 192 static int __init acpi_parse_madt(struct acpi_table_header *table)
 193 {
 194         struct acpi_table_madt *madt = NULL;
 195
 196         if (!cpu_has_apic)
 197                 return -EINVAL;
 198
 199         madt = (struct acpi_table_madt *)table;
 200         if (!madt) {
 201                 printk(KERN_WARNING PREFIX "Unable to map MADT\n");
 202                 return -ENODEV;
 203         }
 204
 205         if (madt->address) {
 206                 acpi_lapic_addr = (u64) madt->address;
 207
 208                 printk(KERN_DEBUG PREFIX "Local APIC address 0x%08x\n",
 209                        madt->address);
 210         }
 211
 212         default_acpi_madt_oem_check(madt->header.oem_id,
 213                                     madt->header.oem_table_id);
 214
 215         return 0;
 216 }
 217
 218 static void __cpuinit acpi_register_lapic(int id, u8 enabled)
 219 {
 220         unsigned int ver = 0;
 221
 222         if (!enabled) {
 223                 ++disabled_cpus;
 224                 return;
 225         }
 226
 227         if (boot_cpu_physical_apicid != -1U)
 228                 ver = apic_version[boot_cpu_physical_apicid];
 229
 230         generic_processor_info(id, ver);
 231 }
 232
 233 static int __init
 234 acpi_parse_x2apic(struct acpi_subtable_header *header, const unsigned long end)
 235 {
 236         struct acpi_madt_local_x2apic *processor = NULL;
 237
 238         processor = (struct acpi_madt_local_x2apic *)header;
 239
 240         if (BAD_MADT_ENTRY(processor, end))
 241                 return -EINVAL;
 242
 243         acpi_table_print_madt_entry(header);
 244
 245 #ifdef CONFIG_X86_X2APIC
 246         /*
 247          * We need to register disabled CPU as well to permit
 248          * counting disabled CPUs. This allows us to size
 249          * cpus_possible_map more accurately, to permit
 250          * to not preallocating memory for all NR_CPUS
 251          * when we use CPU hotplug.
 252          */
 253         acpi_register_lapic(processor->local_apic_id,   /* APIC ID */
 254                             processor->lapic_flags & ACPI_MADT_ENABLED);
 255 #else
 256         printk(KERN_WARNING PREFIX "x2apic entry ignored\n");
 257 #endif
 258
 259         return 0;
 260 }
 261
 262 static int __init
 263 acpi_parse_lapic(struct acpi_subtable_header * header, const unsigned long end)
 264 {
 265         struct acpi_madt_local_apic *processor = NULL;
 266
 267         processor = (struct acpi_madt_local_apic *)header;
 268
 269         if (BAD_MADT_ENTRY(processor, end))
 270                 return -EINVAL;
 271
 272         acpi_table_print_madt_entry(header);
 273
 274         /*
 275          * We need to register disabled CPU as well to permit
 276          * counting disabled CPUs. This allows us to size
 277          * cpus_possible_map more accurately, to permit
 278          * to not preallocating memory for all NR_CPUS
 279          * when we use CPU hotplug.
 280          */
 281         acpi_register_lapic(processor->id,      /* APIC ID */
 282                             processor->lapic_flags & ACPI_MADT_ENABLED);
 283
 284         return 0;
 285 }
 286
 287 static int __init
 288 acpi_parse_sapic(struct acpi_subtable_header *header, const unsigned long end)
 289 {
 290         struct acpi_madt_local_sapic *processor = NULL;
 291
 292         processor = (struct acpi_madt_local_sapic *)header;
 293
 294         if (BAD_MADT_ENTRY(processor, end))
 295                 return -EINVAL;
 296
 297         acpi_table_print_madt_entry(header);
 298
 299         acpi_register_lapic((processor->id << 8) | processor->eid,/* APIC ID */
 300                             processor->lapic_flags & ACPI_MADT_ENABLED);
 301
 302         return 0;
 303 }
 304
 305 static int __init
 306 acpi_parse_lapic_addr_ovr(struct acpi_subtable_header * header,
 307                           const unsigned long end)
 308 {
 309         struct acpi_madt_local_apic_override *lapic_addr_ovr = NULL;
 310
 311         lapic_addr_ovr = (struct acpi_madt_local_apic_override *)header;
 312
 313         if (BAD_MADT_ENTRY(lapic_addr_ovr, end))
 314                 return -EINVAL;
 315
 316         acpi_lapic_addr = lapic_addr_ovr->address;
 317
 318         return 0;
 319 }
 320
 321 static int __init
 322 acpi_parse_x2apic_nmi(struct acpi_subtable_header *header,
 323                       const unsigned long end)
 324 {
 325         struct acpi_madt_local_x2apic_nmi *x2apic_nmi = NULL;
 326
 327         x2apic_nmi = (struct acpi_madt_local_x2apic_nmi *)header;
 328
 329         if (BAD_MADT_ENTRY(x2apic_nmi, end))
 330                 return -EINVAL;
 331
 332         acpi_table_print_madt_entry(header);
 333
 334         if (x2apic_nmi->lint != 1)
 335                 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n");
 336
 337         return 0;
 338 }
 339
 340 static int __init
 341 acpi_parse_lapic_nmi(struct acpi_subtable_header * header, const unsigned long end)
 342 {
 343         struct acpi_madt_local_apic_nmi *lapic_nmi = NULL;
 344
 345         lapic_nmi = (struct acpi_madt_local_apic_nmi *)header;
 346
 347         if (BAD_MADT_ENTRY(lapic_nmi, end))
 348                 return -EINVAL;
 349
 350         acpi_table_print_madt_entry(header);
 351
 352         if (lapic_nmi->lint != 1)
 353                 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n");
 354
 355         return 0;
 356 }
 357
 358 #endif                          /*CONFIG_X86_LOCAL_APIC */
 359
 360 #ifdef CONFIG_X86_IO_APIC
 361
 362 static int __init
 363 acpi_parse_ioapic(struct acpi_subtable_header * header, const unsigned long end)
 364 {
 365         struct acpi_madt_io_apic *ioapic = NULL;
 366
 367         ioapic = (struct acpi_madt_io_apic *)header;
 368
 369         if (BAD_MADT_ENTRY(ioapic, end))
 370                 return -EINVAL;
 371
 372         acpi_table_print_madt_entry(header);
 373
 374         mp_register_ioapic(ioapic->id,
 375                            ioapic->address, ioapic->global_irq_base);
 376
 377         return 0;
 378 }
 379
 380 /*
 381  * Parse Interrupt Source Override for the ACPI SCI
 382  */
 383 static void __init acpi_sci_ioapic_setup(u32 gsi, u16 polarity, u16 trigger)
 384 {
 385         if (trigger == 0)       /* compatible SCI trigger is level */
 386                 trigger = 3;
 387
 388         if (polarity == 0)      /* compatible SCI polarity is low */
 389                 polarity = 3;
 390
 391         /* Command-line over-ride via acpi_sci= */
 392         if (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK)
 393                 trigger = (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2;
 394
 395         if (acpi_sci_flags & ACPI_MADT_POLARITY_MASK)
 396                 polarity = acpi_sci_flags & ACPI_MADT_POLARITY_MASK;
 397
 398         /*
 399          * mp_config_acpi_legacy_irqs() already setup IRQs < 16
 400          * If GSI is < 16, this will update its flags,
 401          * else it will create a new mp_irqs[] entry.
 402          */
 403         mp_override_legacy_irq(gsi, polarity, trigger, gsi);
 404
 405         /*
 406          * stash over-ride to indicate we've been here
 407          * and for later update of acpi_gbl_FADT
 408          */
 409         acpi_sci_override_gsi = gsi;
 410         return;
 411 }
 412
 413 static int __init
 414 acpi_parse_int_src_ovr(struct acpi_subtable_header * header,
 415                        const unsigned long end)
 416 {
 417         struct acpi_madt_interrupt_override *intsrc = NULL;
 418
 419         intsrc = (struct acpi_madt_interrupt_override *)header;
 420
 421         if (BAD_MADT_ENTRY(intsrc, end))
 422                 return -EINVAL;
 423
 424         acpi_table_print_madt_entry(header);
 425
 426         if (intsrc->source_irq == acpi_gbl_FADT.sci_interrupt) {
 427                 acpi_sci_ioapic_setup(intsrc->global_irq,
 428                                       intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
 429                                       (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2);
 430                 return 0;
 431         }
 432
 433         if (acpi_skip_timer_override &&
 434             intsrc->source_irq == 0 && intsrc->global_irq == 2) {
 435                 printk(PREFIX "BIOS IRQ0 pin2 override ignored.\n");
 436                 return 0;
 437         }
 438
 439         mp_override_legacy_irq(intsrc->source_irq,
 440                                 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
 441                                 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2,
 442                                 intsrc->global_irq);
 443
 444         return 0;
 445 }
 446
 447 static int __init
 448 acpi_parse_nmi_src(struct acpi_subtable_header * header, const unsigned long end)
 449 {
 450         struct acpi_madt_nmi_source *nmi_src = NULL;
 451
 452         nmi_src = (struct acpi_madt_nmi_source *)header;
 453
 454         if (BAD_MADT_ENTRY(nmi_src, end))
 455                 return -EINVAL;
 456
 457         acpi_table_print_madt_entry(header);
 458
 459         /* TBD: Support nimsrc entries? */
 460
 461         return 0;
 462 }
 463
 464 #endif                          /* CONFIG_X86_IO_APIC */
 465
 466 /*
 467  * acpi_pic_sci_set_trigger()
 468  *
 469  * use ELCR to set PIC-mode trigger type for SCI
 470  *
 471  * If a PIC-mode SCI is not recognized or gives spurious IRQ7's
 472  * it may require Edge Trigger -- use "acpi_sci=edge"
 473  *
 474  * Port 0x4d0-4d1 are ECLR1 and ECLR2, the Edge/Level Control Registers
 475  * for the 8259 PIC.  bit[n] = 1 means irq[n] is Level, otherwise Edge.
 476  * ECLR1 is IRQs 0-7 (IRQ 0, 1, 2 must be 0)
 477  * ECLR2 is IRQs 8-15 (IRQ 8, 13 must be 0)
 478  */
 479
 480 void __init acpi_pic_sci_set_trigger(unsigned int irq, u16 trigger)
 481 {
 482         unsigned int mask = 1 << irq;
 483         unsigned int old, new;
 484
 485         /* Real old ELCR mask */
 486         old = inb(0x4d0) | (inb(0x4d1) << 8);
 487
 488         /*
 489          * If we use ACPI to set PCI IRQs, then we should clear ELCR
 490          * since we will set it correctly as we enable the PCI irq
 491          * routing.
 492          */
 493         new = acpi_noirq ? old : 0;
 494
 495         /*
 496          * Update SCI information in the ELCR, it isn't in the PCI
 497          * routing tables..
 498          */
 499         switch (trigger) {
 500         case 1:         /* Edge - clear */
 501                 new &= ~mask;
 502                 break;
 503         case 3:         /* Level - set */
 504                 new |= mask;
 505                 break;
 506         }
 507
 508         if (old == new)
 509                 return;
 510
 511         printk(PREFIX "setting ELCR to %04x (from %04x)\n", new, old);
 512         outb(new, 0x4d0);
 513         outb(new >> 8, 0x4d1);
 514 }
 515
 516 int acpi_gsi_to_irq(u32 gsi, unsigned int *irq)
 517 {
 518         *irq = gsi;
 519         return 0;
 520 }
 521
 522 /*
 523  * success: return IRQ number (>=0)
 524  * failure: return < 0
 525  */
 526 int acpi_register_gsi(struct device *dev, u32 gsi, int triggering, int polarity)
 527 {
 528         unsigned int irq;
 529         unsigned int plat_gsi = gsi;
 530
 531 #ifdef CONFIG_PCI
 532         /*
 533          * Make sure all (legacy) PCI IRQs are set as level-triggered.
 534          */
 535         if (acpi_irq_model == ACPI_IRQ_MODEL_PIC) {
 536                 if (triggering == ACPI_LEVEL_SENSITIVE)
 537                         eisa_set_level_irq(gsi);
 538         }
 539 #endif
 540
 541 #ifdef CONFIG_X86_IO_APIC
 542         if (acpi_irq_model == ACPI_IRQ_MODEL_IOAPIC) {
 543                 plat_gsi = mp_register_gsi(dev, gsi, triggering, polarity);
 544         }
 545 #endif
 546         acpi_gsi_to_irq(plat_gsi, &irq);
 547         return irq;
 548 }
 549
 550 /*
 551  *  ACPI based hotplug support for CPU
 552  */
 553 #ifdef CONFIG_ACPI_HOTPLUG_CPU
 554
 555 static int __cpuinit _acpi_map_lsapic(acpi_handle handle, int *pcpu)
 556 {
 557         struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
 558         union acpi_object *obj;
 559         struct acpi_madt_local_apic *lapic;
 560         cpumask_var_t tmp_map, new_map;
 561         u8 physid;
 562         int cpu;
 563         int retval = -ENOMEM;
 564
 565         if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer)))
 566                 return -EINVAL;
 567
 568         if (!buffer.length || !buffer.pointer)
 569                 return -EINVAL;
 570
 571         obj = buffer.pointer;
 572         if (obj->type != ACPI_TYPE_BUFFER ||
 573             obj->buffer.length < sizeof(*lapic)) {
 574                 kfree(buffer.pointer);
 575                 return -EINVAL;
 576         }
 577
 578         lapic = (struct acpi_madt_local_apic *)obj->buffer.pointer;
 579
 580         if (lapic->header.type != ACPI_MADT_TYPE_LOCAL_APIC ||
 581             !(lapic->lapic_flags & ACPI_MADT_ENABLED)) {
 582                 kfree(buffer.pointer);
 583                 return -EINVAL;
 584         }
 585
 586         physid = lapic->id;
 587
 588         kfree(buffer.pointer);
 589         buffer.length = ACPI_ALLOCATE_BUFFER;
 590         buffer.pointer = NULL;
 591
 592         if (!alloc_cpumask_var(&tmp_map, GFP_KERNEL))
 593                 goto out;
 594
 595         if (!alloc_cpumask_var(&new_map, GFP_KERNEL))
 596                 goto free_tmp_map;
 597
 598         cpumask_copy(tmp_map, cpu_present_mask);
 599         acpi_register_lapic(physid, lapic->lapic_flags & ACPI_MADT_ENABLED);
 600
 601         /*
 602          * If mp_register_lapic successfully generates a new logical cpu
 603          * number, then the following will get us exactly what was mapped
 604          */
 605         cpumask_andnot(new_map, cpu_present_mask, tmp_map);
 606         if (cpumask_empty(new_map)) {
 607                 printk ("Unable to map lapic to logical cpu number\n");
 608                 retval = -EINVAL;
 609                 goto free_new_map;
 610         }
 611
 612         cpu = cpumask_first(new_map);
 613
 614         *pcpu = cpu;
 615         retval = 0;
 616
 617 free_new_map:
 618         free_cpumask_var(new_map);
 619 free_tmp_map:
 620         free_cpumask_var(tmp_map);
 621 out:
 622         return retval;
 623 }
 624
 625 /* wrapper to silence section mismatch warning */
 626 int __ref acpi_map_lsapic(acpi_handle handle, int *pcpu)
 627 {
 628         return _acpi_map_lsapic(handle, pcpu);
 629 }
 630 EXPORT_SYMBOL(acpi_map_lsapic);
 631
 632 int acpi_unmap_lsapic(int cpu)
 633 {
 634         per_cpu(x86_cpu_to_apicid, cpu) = -1;
 635         set_cpu_present(cpu, false);
 636         num_processors--;
 637
 638         return (0);
 639 }
 640
 641 EXPORT_SYMBOL(acpi_unmap_lsapic);
 642 #endif                          /* CONFIG_ACPI_HOTPLUG_CPU */
 643
 644 int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base)
 645 {
 646         /* TBD */
 647         return -EINVAL;
 648 }
 649
 650 EXPORT_SYMBOL(acpi_register_ioapic);
 651
 652 int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base)
 653 {
 654         /* TBD */
 655         return -EINVAL;
 656 }
 657
 658 EXPORT_SYMBOL(acpi_unregister_ioapic);
 659
 660 static int __init acpi_parse_sbf(struct acpi_table_header *table)
 661 {
 662         struct acpi_table_boot *sb;
 663
 664         sb = (struct acpi_table_boot *)table;
 665         if (!sb) {
 666                 printk(KERN_WARNING PREFIX "Unable to map SBF\n");
 667                 return -ENODEV;
 668         }
 669
 670         sbf_port = sb->cmos_index;      /* Save CMOS port */
 671
 672         return 0;
 673 }
 674
 675 #ifdef CONFIG_HPET_TIMER
 676 #include <asm/hpet.h>
 677
 678 static struct __initdata resource *hpet_res;
 679
 680 static int __init acpi_parse_hpet(struct acpi_table_header *table)
 681 {
 682         struct acpi_table_hpet *hpet_tbl;
 683
 684         hpet_tbl = (struct acpi_table_hpet *)table;
 685         if (!hpet_tbl) {
 686                 printk(KERN_WARNING PREFIX "Unable to map HPET\n");
 687                 return -ENODEV;
 688         }
 689
 690         if (hpet_tbl->address.space_id != ACPI_SPACE_MEM) {
 691                 printk(KERN_WARNING PREFIX "HPET timers must be located in "
 692                        "memory.\n");
 693                 return -1;
 694         }
 695
 696         hpet_address = hpet_tbl->address.address;
 697
 698         /*
 699          * Some broken BIOSes advertise HPET at 0x0. We really do not
 700          * want to allocate a resource there.
 701          */
 702         if (!hpet_address) {
 703                 printk(KERN_WARNING PREFIX
 704                        "HPET id: %#x base: %#lx is invalid\n",
 705                        hpet_tbl->id, hpet_address);
 706                 return 0;
 707         }
 708 #ifdef CONFIG_X86_64
 709         /*
 710          * Some even more broken BIOSes advertise HPET at
 711          * 0xfed0000000000000 instead of 0xfed00000. Fix it up and add
 712          * some noise:
 713          */
 714         if (hpet_address == 0xfed0000000000000UL) {
 715                 if (!hpet_force_user) {
 716                         printk(KERN_WARNING PREFIX "HPET id: %#x "
 717                                "base: 0xfed0000000000000 is bogus\n "
 718                                "try hpet=force on the kernel command line to "
 719                                "fix it up to 0xfed00000.\n", hpet_tbl->id);
 720                         hpet_address = 0;
 721                         return 0;
 722                 }
 723                 printk(KERN_WARNING PREFIX
 724                        "HPET id: %#x base: 0xfed0000000000000 fixed up "
 725                        "to 0xfed00000.\n", hpet_tbl->id);
 726                 hpet_address >>= 32;
 727         }
 728 #endif
 729         printk(KERN_INFO PREFIX "HPET id: %#x base: %#lx\n",
 730                hpet_tbl->id, hpet_address);
 731
 732         /*
 733          * Allocate and initialize the HPET firmware resource for adding into
 734          * the resource tree during the lateinit timeframe.
 735          */
 736 #define HPET_RESOURCE_NAME_SIZE 9
 737         hpet_res = alloc_bootmem(sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE);
 738
 739         hpet_res->name = (void *)&hpet_res[1];
 740         hpet_res->flags = IORESOURCE_MEM;
 741         snprintf((char *)hpet_res->name, HPET_RESOURCE_NAME_SIZE, "HPET %u",
 742                  hpet_tbl->sequence);
 743
 744         hpet_res->start = hpet_address;
 745         hpet_res->end = hpet_address + (1 * 1024) - 1;
 746
 747         return 0;
 748 }
 749
 750 /*
 751  * hpet_insert_resource inserts the HPET resources used into the resource
 752  * tree.
 753  */
 754 static __init int hpet_insert_resource(void)
 755 {
 756         if (!hpet_res)
 757                 return 1;
 758
 759         return insert_resource(&iomem_resource, hpet_res);
 760 }
 761
 762 late_initcall(hpet_insert_resource);
 763
 764 #else
 765 #define acpi_parse_hpet NULL
 766 #endif
 767
 768 static int __init acpi_parse_fadt(struct acpi_table_header *table)
 769 {
 770
 771 #ifdef CONFIG_X86_PM_TIMER
 772         /* detect the location of the ACPI PM Timer */
 773         if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID) {
 774                 /* FADT rev. 2 */
 775                 if (acpi_gbl_FADT.xpm_timer_block.space_id !=
 776                     ACPI_ADR_SPACE_SYSTEM_IO)
 777                         return 0;
 778
 779                 pmtmr_ioport = acpi_gbl_FADT.xpm_timer_block.address;
 780                 /*
 781                  * "X" fields are optional extensions to the original V1.0
 782                  * fields, so we must selectively expand V1.0 fields if the
 783                  * corresponding X field is zero.
 784                  */
 785                 if (!pmtmr_ioport)
 786                         pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
 787         } else {
 788                 /* FADT rev. 1 */
 789                 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
 790         }
 791         if (pmtmr_ioport)
 792                 printk(KERN_INFO PREFIX "PM-Timer IO Port: %#x\n",
 793                        pmtmr_ioport);
 794 #endif
 795         return 0;
 796 }
 797
 798 #ifdef  CONFIG_X86_LOCAL_APIC
 799 /*
 800  * Parse LAPIC entries in MADT
 801  * returns 0 on success, < 0 on error
 802  */
 803
 804 static void __init acpi_register_lapic_address(unsigned long address)
 805 {
 806         mp_lapic_addr = address;
 807
 808         set_fixmap_nocache(FIX_APIC_BASE, address);
 809         if (boot_cpu_physical_apicid == -1U) {
 810                 boot_cpu_physical_apicid  = read_apic_id();
 811                 apic_version[boot_cpu_physical_apicid] =
 812                          GET_APIC_VERSION(apic_read(APIC_LVR));
 813         }
 814 }
 815
 816 static int __init early_acpi_parse_madt_lapic_addr_ovr(void)
 817 {
 818         int count;
 819
 820         if (!cpu_has_apic)
 821                 return -ENODEV;
 822
 823         /*
 824          * Note that the LAPIC address is obtained from the MADT (32-bit value)
 825          * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value).
 826          */
 827
 828         count =
 829             acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
 830                                   acpi_parse_lapic_addr_ovr, 0);
 831         if (count < 0) {
 832                 printk(KERN_ERR PREFIX
 833                        "Error parsing LAPIC address override entry\n");
 834                 return count;
 835         }
 836
 837         acpi_register_lapic_address(acpi_lapic_addr);
 838
 839         return count;
 840 }
 841
 842 static int __init acpi_parse_madt_lapic_entries(void)
 843 {
 844         int count;
 845         int x2count = 0;
 846
 847         if (!cpu_has_apic)
 848                 return -ENODEV;
 849
 850         /*
 851          * Note that the LAPIC address is obtained from the MADT (32-bit value)
 852          * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value).
 853          */
 854
 855         count =
 856             acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
 857                                   acpi_parse_lapic_addr_ovr, 0);
 858         if (count < 0) {
 859                 printk(KERN_ERR PREFIX
 860                        "Error parsing LAPIC address override entry\n");
 861                 return count;
 862         }
 863
 864         acpi_register_lapic_address(acpi_lapic_addr);
 865
 866         count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC,
 867                                       acpi_parse_sapic, MAX_APICS);
 868
 869         if (!count) {
 870                 x2count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC,
 871                                                 acpi_parse_x2apic, MAX_APICS);
 872                 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC,
 873                                               acpi_parse_lapic, MAX_APICS);
 874         }
 875         if (!count && !x2count) {
 876                 printk(KERN_ERR PREFIX "No LAPIC entries present\n");
 877                 /* TBD: Cleanup to allow fallback to MPS */
 878                 return -ENODEV;
 879         } else if (count < 0 || x2count < 0) {
 880                 printk(KERN_ERR PREFIX "Error parsing LAPIC entry\n");
 881                 /* TBD: Cleanup to allow fallback to MPS */
 882                 return count;
 883         }
 884
 885         x2count =
 886             acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC_NMI,
 887                                   acpi_parse_x2apic_nmi, 0);
 888         count =
 889             acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI, acpi_parse_lapic_nmi, 0);
 890         if (count < 0 || x2count < 0) {
 891                 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n");
 892                 /* TBD: Cleanup to allow fallback to MPS */
 893                 return count;
 894         }
 895         return 0;
 896 }
 897 #endif                          /* CONFIG_X86_LOCAL_APIC */
 898
 899 #ifdef  CONFIG_X86_IO_APIC
 900 #define MP_ISA_BUS              0
 901
 902 #ifdef CONFIG_X86_ES7000
 903 extern int es7000_plat;
 904 #endif
 905
 906 static struct {
 907         int gsi_base;
 908         int gsi_end;
 909 } mp_ioapic_routing[MAX_IO_APICS];
 910
 911 int mp_find_ioapic(int gsi)
 912 {
 913         int i = 0;
 914
 915         /* Find the IOAPIC that manages this GSI. */
 916         for (i = 0; i < nr_ioapics; i++) {
 917                 if ((gsi >= mp_ioapic_routing[i].gsi_base)
 918                     && (gsi <= mp_ioapic_routing[i].gsi_end))
 919                         return i;
 920         }
 921
 922         printk(KERN_ERR "ERROR: Unable to locate IOAPIC for GSI %d\n", gsi);
 923         return -1;
 924 }
 925
 926 int mp_find_ioapic_pin(int ioapic, int gsi)
 927 {
 928         if (WARN_ON(ioapic == -1))
 929                 return -1;
 930         if (WARN_ON(gsi > mp_ioapic_routing[ioapic].gsi_end))
 931                 return -1;
 932
 933         return gsi - mp_ioapic_routing[ioapic].gsi_base;
 934 }
 935
 936 static u8 __init uniq_ioapic_id(u8 id)
 937 {
 938 #ifdef CONFIG_X86_32
 939         if ((boot_cpu_data.x86_vendor == X86_VENDOR_INTEL) &&
 940             !APIC_XAPIC(apic_version[boot_cpu_physical_apicid]))
 941                 return io_apic_get_unique_id(nr_ioapics, id);
 942         else
 943                 return id;
 944 #else
 945         int i;
 946         DECLARE_BITMAP(used, 256);
 947         bitmap_zero(used, 256);
 948         for (i = 0; i < nr_ioapics; i++) {
 949                 struct mpc_ioapic *ia = &mp_ioapics[i];
 950                 __set_bit(ia->apicid, used);
 951         }
 952         if (!test_bit(id, used))
 953                 return id;
 954         return find_first_zero_bit(used, 256);
 955 #endif
 956 }
 957
 958 static int bad_ioapic(unsigned long address)
 959 {
 960         if (nr_ioapics >= MAX_IO_APICS) {
 961                 printk(KERN_ERR "ERROR: Max # of I/O APICs (%d) exceeded "
 962                        "(found %d)\n", MAX_IO_APICS, nr_ioapics);
 963                 panic("Recompile kernel with bigger MAX_IO_APICS!\n");
 964         }
 965         if (!address) {
 966                 printk(KERN_ERR "WARNING: Bogus (zero) I/O APIC address"
 967                        " found in table, skipping!\n");
 968                 return 1;
 969         }
 970         return 0;
 971 }
 972
 973 void __init mp_register_ioapic(int id, u32 address, u32 gsi_base)
 974 {
 975         int idx = 0;
 976
 977         if (bad_ioapic(address))
 978                 return;
 979
 980         idx = nr_ioapics;
 981
 982         mp_ioapics[idx].type = MP_IOAPIC;
 983         mp_ioapics[idx].flags = MPC_APIC_USABLE;
 984         mp_ioapics[idx].apicaddr = address;
 985
 986         set_fixmap_nocache(FIX_IO_APIC_BASE_0 + idx, address);
 987         mp_ioapics[idx].apicid = uniq_ioapic_id(id);
 988 #ifdef CONFIG_X86_32
 989         mp_ioapics[idx].apicver = io_apic_get_version(idx);
 990 #else
 991         mp_ioapics[idx].apicver = 0;
 992 #endif
 993         /*
 994          * Build basic GSI lookup table to facilitate gsi->io_apic lookups
 995          * and to prevent reprogramming of IOAPIC pins (PCI GSIs).
 996          */
 997         mp_ioapic_routing[idx].gsi_base = gsi_base;
 998         mp_ioapic_routing[idx].gsi_end = gsi_base +
 999             io_apic_get_redir_entries(idx);
1000
1001         printk(KERN_INFO "IOAPIC[%d]: apic_id %d, version %d, address 0x%x, "
1002                "GSI %d-%d\n", idx, mp_ioapics[idx].apicid,
1003                mp_ioapics[idx].apicver, mp_ioapics[idx].apicaddr,
1004                mp_ioapic_routing[idx].gsi_base, mp_ioapic_routing[idx].gsi_end);
1005
1006         nr_ioapics++;
1007 }
1008
1009 int __init acpi_probe_gsi(void)
1010 {
1011         int idx;
1012         int gsi;
1013         int max_gsi = 0;
1014
1015         if (acpi_disabled)
1016                 return 0;
1017
1018         if (!acpi_ioapic)
1019                 return 0;
1020
1021         max_gsi = 0;
1022         for (idx = 0; idx < nr_ioapics; idx++) {
1023                 gsi = mp_ioapic_routing[idx].gsi_end;
1024
1025                 if (gsi > max_gsi)
1026                         max_gsi = gsi;
1027         }
1028
1029         return max_gsi + 1;
1030 }
1031
1032 static void assign_to_mp_irq(struct mpc_intsrc *m,
1033                                     struct mpc_intsrc *mp_irq)
1034 {
1035         memcpy(mp_irq, m, sizeof(struct mpc_intsrc));
1036 }
1037
1038 static int mp_irq_cmp(struct mpc_intsrc *mp_irq,
1039                                 struct mpc_intsrc *m)
1040 {
1041         return memcmp(mp_irq, m, sizeof(struct mpc_intsrc));
1042 }
1043
1044 static void save_mp_irq(struct mpc_intsrc *m)
1045 {
1046         int i;
1047
1048         for (i = 0; i < mp_irq_entries; i++) {
1049                 if (!mp_irq_cmp(&mp_irqs[i], m))
1050                         return;
1051         }
1052
1053         assign_to_mp_irq(m, &mp_irqs[mp_irq_entries]);
1054         if (++mp_irq_entries == MAX_IRQ_SOURCES)
1055                 panic("Max # of irq sources exceeded!!\n");
1056 }
1057
1058 void __init mp_override_legacy_irq(u8 bus_irq, u8 polarity, u8 trigger, u32 gsi)
1059 {
1060         int ioapic;
1061         int pin;
1062         struct mpc_intsrc mp_irq;
1063
1064         /*
1065          * Convert 'gsi' to 'ioapic.pin'.
1066          */
1067         ioapic = mp_find_ioapic(gsi);
1068         if (ioapic < 0)
1069                 return;
1070         pin = mp_find_ioapic_pin(ioapic, gsi);
1071
1072         /*
1073          * TBD: This check is for faulty timer entries, where the override
1074          *      erroneously sets the trigger to level, resulting in a HUGE
1075          *      increase of timer interrupts!
1076          */
1077         if ((bus_irq == 0) && (trigger == 3))
1078                 trigger = 1;
1079
1080         mp_irq.type = MP_INTSRC;
1081         mp_irq.irqtype = mp_INT;
1082         mp_irq.irqflag = (trigger << 2) | polarity;
1083         mp_irq.srcbus = MP_ISA_BUS;
1084         mp_irq.srcbusirq = bus_irq;     /* IRQ */
1085         mp_irq.dstapic = mp_ioapics[ioapic].apicid; /* APIC ID */
1086         mp_irq.dstirq = pin;    /* INTIN# */
1087
1088         save_mp_irq(&mp_irq);
1089 }
1090
1091 void __init mp_config_acpi_legacy_irqs(void)
1092 {
1093         int i;
1094         int ioapic;
1095         unsigned int dstapic;
1096         struct mpc_intsrc mp_irq;
1097
1098 #if defined (CONFIG_MCA) || defined (CONFIG_EISA)
1099         /*
1100          * Fabricate the legacy ISA bus (bus #31).
1101          */
1102         mp_bus_id_to_type[MP_ISA_BUS] = MP_BUS_ISA;
1103 #endif
1104         set_bit(MP_ISA_BUS, mp_bus_not_pci);
1105         pr_debug("Bus #%d is ISA\n", MP_ISA_BUS);
1106
1107 #ifdef CONFIG_X86_ES7000
1108         /*
1109          * Older generations of ES7000 have no legacy identity mappings
1110          */
1111         if (es7000_plat == 1)
1112                 return;
1113 #endif
1114
1115         /*
1116          * Locate the IOAPIC that manages the ISA IRQs (0-15).
1117          */
1118         ioapic = mp_find_ioapic(0);
1119         if (ioapic < 0)
1120                 return;
1121         dstapic = mp_ioapics[ioapic].apicid;
1122
1123         /*
1124          * Use the default configuration for the IRQs 0-15.  Unless
1125          * overridden by (MADT) interrupt source override entries.
1126          */
1127         for (i = 0; i < 16; i++) {
1128                 int idx;
1129
1130                 for (idx = 0; idx < mp_irq_entries; idx++) {
1131                         struct mpc_intsrc *irq = mp_irqs + idx;
1132
1133                         /* Do we already have a mapping for this ISA IRQ? */
1134                         if (irq->srcbus == MP_ISA_BUS && irq->srcbusirq == i)
1135                                 break;
1136
1137                         /* Do we already have a mapping for this IOAPIC pin */
1138                         if (irq->dstapic == dstapic && irq->dstirq == i)
1139                                 break;
1140                 }
1141
1142                 if (idx != mp_irq_entries) {
1143                         printk(KERN_DEBUG "ACPI: IRQ%d used by override.\n", i);
1144                         continue;       /* IRQ already used */
1145                 }
1146
1147                 mp_irq.type = MP_INTSRC;
1148                 mp_irq.irqflag = 0;     /* Conforming */
1149                 mp_irq.srcbus = MP_ISA_BUS;
1150                 mp_irq.dstapic = dstapic;
1151                 mp_irq.irqtype = mp_INT;
1152                 mp_irq.srcbusirq = i; /* Identity mapped */
1153                 mp_irq.dstirq = i;
1154
1155                 save_mp_irq(&mp_irq);
1156         }
1157 }
1158
1159 static int mp_config_acpi_gsi(struct device *dev, u32 gsi, int triggering,
1160                         int polarity)
1161 {
1162 #ifdef CONFIG_X86_MPPARSE
1163         struct mpc_intsrc mp_irq;
1164         struct pci_dev *pdev;
1165         unsigned char number;
1166         unsigned int devfn;
1167         int ioapic;
1168         u8 pin;
1169
1170         if (!acpi_ioapic)
1171                 return 0;
1172         if (!dev)
1173                 return 0;
1174         if (dev->bus != &pci_bus_type)
1175                 return 0;
1176
1177         pdev = to_pci_dev(dev);
1178         number = pdev->bus->number;
1179         devfn = pdev->devfn;
1180         pin = pdev->pin;
1181         /* print the entry should happen on mptable identically */
1182         mp_irq.type = MP_INTSRC;
1183         mp_irq.irqtype = mp_INT;
1184         mp_irq.irqflag = (triggering == ACPI_EDGE_SENSITIVE ? 4 : 0x0c) |
1185                                 (polarity == ACPI_ACTIVE_HIGH ? 1 : 3);
1186         mp_irq.srcbus = number;
1187         mp_irq.srcbusirq = (((devfn >> 3) & 0x1f) << 2) | ((pin - 1) & 3);
1188         ioapic = mp_find_ioapic(gsi);
1189         mp_irq.dstapic = mp_ioapics[ioapic].apicid;
1190         mp_irq.dstirq = mp_find_ioapic_pin(ioapic, gsi);
1191
1192         save_mp_irq(&mp_irq);
1193 #endif
1194         return 0;
1195 }
1196
1197 int mp_register_gsi(struct device *dev, u32 gsi, int triggering, int polarity)
1198 {
1199         int ioapic;
1200         int ioapic_pin;
1201
1202         if (acpi_irq_model != ACPI_IRQ_MODEL_IOAPIC)
1203                 return gsi;
1204
1205         /* Don't set up the ACPI SCI because it's already set up */
1206         if (acpi_gbl_FADT.sci_interrupt == gsi)
1207                 return gsi;
1208
1209         ioapic = mp_find_ioapic(gsi);
1210         if (ioapic < 0) {
1211                 printk(KERN_WARNING "No IOAPIC for GSI %u\n", gsi);
1212                 return gsi;
1213         }
1214
1215         ioapic_pin = mp_find_ioapic_pin(ioapic, gsi);
1216
1217 #ifdef CONFIG_X86_32
1218         if (ioapic_renumber_irq)
1219                 gsi = ioapic_renumber_irq(ioapic, gsi);
1220 #endif
1221
1222         if (ioapic_pin > MP_MAX_IOAPIC_PIN) {
1223                 printk(KERN_ERR "Invalid reference to IOAPIC pin "
1224                        "%d-%d\n", mp_ioapics[ioapic].apicid,
1225                        ioapic_pin);
1226                 return gsi;
1227         }
1228         mp_config_acpi_gsi(dev, gsi, triggering, polarity);
1229
1230         io_apic_set_pci_routing(dev, ioapic, ioapic_pin, gsi,
1231                                 triggering == ACPI_EDGE_SENSITIVE ? 0 : 1,
1232                                 polarity == ACPI_ACTIVE_HIGH ? 0 : 1);
1233
1234         return gsi;
1235 }
1236
1237 /*
1238  * Parse IOAPIC related entries in MADT
1239  * returns 0 on success, < 0 on error
1240  */
1241 static int __init acpi_parse_madt_ioapic_entries(void)
1242 {
1243         int count;
1244
1245         /*
1246          * ACPI interpreter is required to complete interrupt setup,
1247          * so if it is off, don't enumerate the io-apics with ACPI.
1248          * If MPS is present, it will handle them,
1249          * otherwise the system will stay in PIC mode
1250          */
1251         if (acpi_disabled || acpi_noirq) {
1252                 return -ENODEV;
1253         }
1254
1255         if (!cpu_has_apic)
1256                 return -ENODEV;
1257
1258         /*
1259          * if "noapic" boot option, don't look for IO-APICs
1260          */
1261         if (skip_ioapic_setup) {
1262                 printk(KERN_INFO PREFIX "Skipping IOAPIC probe "
1263                        "due to 'noapic' option.\n");
1264                 return -ENODEV;
1265         }
1266
1267         count =
1268             acpi_table_parse_madt(ACPI_MADT_TYPE_IO_APIC, acpi_parse_ioapic,
1269                                   MAX_IO_APICS);
1270         if (!count) {
1271                 printk(KERN_ERR PREFIX "No IOAPIC entries present\n");
1272                 return -ENODEV;
1273         } else if (count < 0) {
1274                 printk(KERN_ERR PREFIX "Error parsing IOAPIC entry\n");
1275                 return count;
1276         }
1277
1278         count =
1279             acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE, acpi_parse_int_src_ovr,
1280                                   nr_irqs);
1281         if (count < 0) {
1282                 printk(KERN_ERR PREFIX
1283                        "Error parsing interrupt source overrides entry\n");
1284                 /* TBD: Cleanup to allow fallback to MPS */
1285                 return count;
1286         }
1287
1288         /*
1289          * If BIOS did not supply an INT_SRC_OVR for the SCI
1290          * pretend we got one so we can set the SCI flags.
1291          */
1292         if (!acpi_sci_override_gsi)
1293                 acpi_sci_ioapic_setup(acpi_gbl_FADT.sci_interrupt, 0, 0);
1294
1295         /* Fill in identity legacy mapings where no override */
1296         mp_config_acpi_legacy_irqs();
1297
1298         count =
1299             acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE, acpi_parse_nmi_src,
1300                                   nr_irqs);
1301         if (count < 0) {
1302                 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n");
1303                 /* TBD: Cleanup to allow fallback to MPS */
1304                 return count;
1305         }
1306
1307         return 0;
1308 }
1309 #else
1310 static inline int acpi_parse_madt_ioapic_entries(void)
1311 {
1312         return -1;
1313 }
1314 #endif  /* !CONFIG_X86_IO_APIC */
1315
1316 static void __init early_acpi_process_madt(void)
1317 {
1318 #ifdef CONFIG_X86_LOCAL_APIC
1319         int error;
1320
1321         if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1322
1323                 /*
1324                  * Parse MADT LAPIC entries
1325                  */
1326                 error = early_acpi_parse_madt_lapic_addr_ovr();
1327                 if (!error) {
1328                         acpi_lapic = 1;
1329                         smp_found_config = 1;
1330                 }
1331                 if (error == -EINVAL) {
1332                         /*
1333                          * Dell Precision Workstation 410, 610 come here.
1334                          */
1335                         printk(KERN_ERR PREFIX
1336                                "Invalid BIOS MADT, disabling ACPI\n");
1337                         disable_acpi();
1338                 }
1339         }
1340 #endif
1341 }
1342
1343 static void __init acpi_process_madt(void)
1344 {
1345 #ifdef CONFIG_X86_LOCAL_APIC
1346         int error;
1347
1348         if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1349
1350                 /*
1351                  * Parse MADT LAPIC entries
1352                  */
1353                 error = acpi_parse_madt_lapic_entries();
1354                 if (!error) {
1355                         acpi_lapic = 1;
1356
1357 #ifdef CONFIG_X86_BIGSMP
1358                         generic_bigsmp_probe();
1359 #endif
1360                         /*
1361                          * Parse MADT IO-APIC entries
1362                          */
1363                         error = acpi_parse_madt_ioapic_entries();
1364                         if (!error) {
1365                                 acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC;
1366                                 acpi_ioapic = 1;
1367
1368                                 smp_found_config = 1;
1369                                 if (apic->setup_apic_routing)
1370                                         apic->setup_apic_routing();
1371                         }
1372                 }
1373                 if (error == -EINVAL) {
1374                         /*
1375                          * Dell Precision Workstation 410, 610 come here.
1376                          */
1377                         printk(KERN_ERR PREFIX
1378                                "Invalid BIOS MADT, disabling ACPI\n");
1379                         disable_acpi();
1380                 }
1381         } else {
1382                 /*
1383                  * ACPI found no MADT, and so ACPI wants UP PIC mode.
1384                  * In the event an MPS table was found, forget it.
1385                  * Boot with "acpi=off" to use MPS on such a system.
1386                  */
1387                 if (smp_found_config) {
1388                         printk(KERN_WARNING PREFIX
1389                                 "No APIC-table, disabling MPS\n");
1390                         smp_found_config = 0;
1391                 }
1392         }
1393
1394         /*
1395          * ACPI supports both logical (e.g. Hyper-Threading) and physical
1396          * processors, where MPS only supports physical.
1397          */
1398         if (acpi_lapic && acpi_ioapic)
1399                 printk(KERN_INFO "Using ACPI (MADT) for SMP configuration "
1400                        "information\n");
1401         else if (acpi_lapic)
1402                 printk(KERN_INFO "Using ACPI for processor (LAPIC) "
1403                        "configuration information\n");
1404 #endif
1405         return;
1406 }
1407
1408 static int __init disable_acpi_irq(const struct dmi_system_id *d)
1409 {
1410         if (!acpi_force) {
1411                 printk(KERN_NOTICE "%s detected: force use of acpi=noirq\n",
1412                        d->ident);
1413                 acpi_noirq_set();
1414         }
1415         return 0;
1416 }
1417
1418 static int __init disable_acpi_pci(const struct dmi_system_id *d)
1419 {
1420         if (!acpi_force) {
1421                 printk(KERN_NOTICE "%s detected: force use of pci=noacpi\n",
1422                        d->ident);
1423                 acpi_disable_pci();
1424         }
1425         return 0;
1426 }
1427
1428 static int __init dmi_disable_acpi(const struct dmi_system_id *d)
1429 {
1430         if (!acpi_force) {
1431                 printk(KERN_NOTICE "%s detected: acpi off\n", d->ident);
1432                 disable_acpi();
1433         } else {
1434                 printk(KERN_NOTICE
1435                        "Warning: DMI blacklist says broken, but acpi forced\n");
1436         }
1437         return 0;
1438 }
1439
1440 /*
1441  * Limit ACPI to CPU enumeration for HT
1442  */
1443 static int __init force_acpi_ht(const struct dmi_system_id *d)
1444 {
1445         if (!acpi_force) {
1446                 printk(KERN_NOTICE "%s detected: force use of acpi=ht\n",
1447                        d->ident);
1448                 disable_acpi();
1449                 acpi_ht = 1;
1450         } else {
1451                 printk(KERN_NOTICE
1452                        "Warning: acpi=force overrules DMI blacklist: acpi=ht\n");
1453         }
1454         return 0;
1455 }
1456
1457 /*
1458  * Force ignoring BIOS IRQ0 pin2 override
1459  */
1460 static int __init dmi_ignore_irq0_timer_override(const struct dmi_system_id *d)
1461 {
1462         /*
1463          * The ati_ixp4x0_rev() early PCI quirk should have set
1464          * the acpi_skip_timer_override flag already:
1465          */
1466         if (!acpi_skip_timer_override) {
1467                 WARN(1, KERN_ERR "ati_ixp4x0 quirk not complete.\n");
1468                 pr_notice("%s detected: Ignoring BIOS IRQ0 pin2 override\n",
1469                         d->ident);
1470                 acpi_skip_timer_override = 1;
1471         }
1472         return 0;
1473 }
1474
1475 /*
1476  * If your system is blacklisted here, but you find that acpi=force
1477  * works for you, please contact linux-acpi@vger.kernel.org
1478  */
1479 static struct dmi_system_id __initdata acpi_dmi_table[] = {
1480         /*
1481          * Boxes that need ACPI disabled
1482          */
1483         {
1484          .callback = dmi_disable_acpi,
1485          .ident = "IBM Thinkpad",
1486          .matches = {
1487                      DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1488                      DMI_MATCH(DMI_BOARD_NAME, "2629H1G"),
1489                      },
1490          },
1491
1492         /*
1493          * Boxes that need acpi=ht
1494          */
1495         {
1496          .callback = force_acpi_ht,
1497          .ident = "FSC Primergy T850",
1498          .matches = {
1499                      DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
1500                      DMI_MATCH(DMI_PRODUCT_NAME, "PRIMERGY T850"),
1501                      },
1502          },
1503         {
1504          .callback = force_acpi_ht,
1505          .ident = "HP VISUALIZE NT Workstation",
1506          .matches = {
1507                      DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"),
1508                      DMI_MATCH(DMI_PRODUCT_NAME, "HP VISUALIZE NT Workstation"),
1509                      },
1510          },
1511         {
1512          .callback = force_acpi_ht,
1513          .ident = "Compaq Workstation W8000",
1514          .matches = {
1515                      DMI_MATCH(DMI_SYS_VENDOR, "Compaq"),
1516                      DMI_MATCH(DMI_PRODUCT_NAME, "Workstation W8000"),
1517                      },
1518          },
1519         {
1520          .callback = force_acpi_ht,
1521          .ident = "ASUS P4B266",
1522          .matches = {
1523                      DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1524                      DMI_MATCH(DMI_BOARD_NAME, "P4B266"),
1525                      },
1526          },
1527         {
1528          .callback = force_acpi_ht,
1529          .ident = "ASUS P2B-DS",
1530          .matches = {
1531                      DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1532                      DMI_MATCH(DMI_BOARD_NAME, "P2B-DS"),
1533                      },
1534          },
1535         {
1536          .callback = force_acpi_ht,
1537          .ident = "ASUS CUR-DLS",
1538          .matches = {
1539                      DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1540                      DMI_MATCH(DMI_BOARD_NAME, "CUR-DLS"),
1541                      },
1542          },
1543         {
1544          .callback = force_acpi_ht,
1545          .ident = "ABIT i440BX-W83977",
1546          .matches = {
1547                      DMI_MATCH(DMI_BOARD_VENDOR, "ABIT <http://www.abit.com>"),
1548                      DMI_MATCH(DMI_BOARD_NAME, "i440BX-W83977 (BP6)"),
1549                      },
1550          },
1551         {
1552          .callback = force_acpi_ht,
1553          .ident = "IBM Bladecenter",
1554          .matches = {
1555                      DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1556                      DMI_MATCH(DMI_BOARD_NAME, "IBM eServer BladeCenter HS20"),
1557                      },
1558          },
1559         {
1560          .callback = force_acpi_ht,
1561          .ident = "IBM eServer xSeries 360",
1562          .matches = {
1563                      DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1564                      DMI_MATCH(DMI_BOARD_NAME, "eServer xSeries 360"),
1565                      },
1566          },
1567         {
1568          .callback = force_acpi_ht,
1569          .ident = "IBM eserver xSeries 330",
1570          .matches = {
1571                      DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1572                      DMI_MATCH(DMI_BOARD_NAME, "eserver xSeries 330"),
1573                      },
1574          },
1575         {
1576          .callback = force_acpi_ht,
1577          .ident = "IBM eserver xSeries 440",
1578          .matches = {
1579                      DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1580                      DMI_MATCH(DMI_PRODUCT_NAME, "eserver xSeries 440"),
1581                      },
1582          },
1583
1584         /*
1585          * Boxes that need ACPI PCI IRQ routing disabled
1586          */
1587         {
1588          .callback = disable_acpi_irq,
1589          .ident = "ASUS A7V",
1590          .matches = {
1591                      DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC"),
1592                      DMI_MATCH(DMI_BOARD_NAME, "<A7V>"),
1593                      /* newer BIOS, Revision 1011, does work */
1594                      DMI_MATCH(DMI_BIOS_VERSION,
1595                                "ASUS A7V ACPI BIOS Revision 1007"),
1596                      },
1597          },
1598         {
1599                 /*
1600                  * Latest BIOS for IBM 600E (1.16) has bad pcinum
1601                  * for LPC bridge, which is needed for the PCI
1602                  * interrupt links to work. DSDT fix is in bug 5966.
1603                  * 2645, 2646 model numbers are shared with 600/600E/600X
1604                  */
1605          .callback = disable_acpi_irq,
1606          .ident = "IBM Thinkpad 600 Series 2645",
1607          .matches = {
1608                      DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1609                      DMI_MATCH(DMI_BOARD_NAME, "2645"),
1610                      },
1611          },
1612         {
1613          .callback = disable_acpi_irq,
1614          .ident = "IBM Thinkpad 600 Series 2646",
1615          .matches = {
1616                      DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1617                      DMI_MATCH(DMI_BOARD_NAME, "2646"),
1618                      },
1619          },
1620         /*
1621          * Boxes that need ACPI PCI IRQ routing and PCI scan disabled
1622          */
1623         {                       /* _BBN 0 bug */
1624          .callback = disable_acpi_pci,
1625          .ident = "ASUS PR-DLS",
1626          .matches = {
1627                      DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1628                      DMI_MATCH(DMI_BOARD_NAME, "PR-DLS"),
1629                      DMI_MATCH(DMI_BIOS_VERSION,
1630                                "ASUS PR-DLS ACPI BIOS Revision 1010"),
1631                      DMI_MATCH(DMI_BIOS_DATE, "03/21/2003")
1632                      },
1633          },
1634         {
1635          .callback = disable_acpi_pci,
1636          .ident = "Acer TravelMate 36x Laptop",
1637          .matches = {
1638                      DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
1639                      DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"),
1640                      },
1641          },
1642         {}
1643 };
1644
1645 /* second table for DMI checks that should run after early-quirks */
1646 static struct dmi_system_id __initdata acpi_dmi_table_late[] = {
1647         /*
1648          * HP laptops which use a DSDT reporting as HP/SB400/10000,
1649          * which includes some code which overrides all temperature
1650          * trip points to 16C if the INTIN2 input of the I/O APIC
1651          * is enabled.  This input is incorrectly designated the
1652          * ISA IRQ 0 via an interrupt source override even though
1653          * it is wired to the output of the master 8259A and INTIN0
1654          * is not connected at all.  Force ignoring BIOS IRQ0 pin2
1655          * override in that cases.
1656          */
1657         {
1658          .callback = dmi_ignore_irq0_timer_override,
1659          .ident = "HP nx6115 laptop",
1660          .matches = {
1661                      DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1662                      DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6115"),
1663                      },
1664          },
1665         {
1666          .callback = dmi_ignore_irq0_timer_override,
1667          .ident = "HP NX6125 laptop",
1668          .matches = {
1669                      DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1670                      DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6125"),
1671                      },
1672          },
1673         {
1674          .callback = dmi_ignore_irq0_timer_override,
1675          .ident = "HP NX6325 laptop",
1676          .matches = {
1677                      DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1678                      DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6325"),
1679                      },
1680          },
1681         {
1682          .callback = dmi_ignore_irq0_timer_override,
1683          .ident = "HP 6715b laptop",
1684          .matches = {
1685                      DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1686                      DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq 6715b"),
1687                      },
1688          },
1689         {}
1690 };
1691
1692 /*
1693  * acpi_boot_table_init() and acpi_boot_init()
1694  *  called from setup_arch(), always.
1695  *      1. checksums all tables
1696  *      2. enumerates lapics
1697  *      3. enumerates io-apics
1698  *
1699  * acpi_table_init() is separate to allow reading SRAT without
1700  * other side effects.
1701  *
1702  * side effects of acpi_boot_init:
1703  *      acpi_lapic = 1 if LAPIC found
1704  *      acpi_ioapic = 1 if IOAPIC found
1705  *      if (acpi_lapic && acpi_ioapic) smp_found_config = 1;
1706  *      if acpi_blacklisted() acpi_disabled = 1;
1707  *      acpi_irq_model=...
1708  *      ...
1709  *
1710  * return value: (currently ignored)
1711  *      0: success
1712  *      !0: failure
1713  */
1714
1715 int __init acpi_boot_table_init(void)
1716 {
1717         int error;
1718
1719         dmi_check_system(acpi_dmi_table);
1720
1721         /*
1722          * If acpi_disabled, bail out
1723          * One exception: acpi=ht continues far enough to enumerate LAPICs
1724          */
1725         if (acpi_disabled && !acpi_ht)
1726                 return 1;
1727
1728         /*
1729          * Initialize the ACPI boot-time table parser.
1730          */
1731         error = acpi_table_init();
1732         if (error) {
1733                 disable_acpi();
1734                 return error;
1735         }
1736
1737         acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1738
1739         /*
1740          * blacklist may disable ACPI entirely
1741          */
1742         error = acpi_blacklisted();
1743         if (error) {
1744                 if (acpi_force) {
1745                         printk(KERN_WARNING PREFIX "acpi=force override\n");
1746                 } else {
1747                         printk(KERN_WARNING PREFIX "Disabling ACPI support\n");
1748                         disable_acpi();
1749                         return error;
1750                 }
1751         }
1752
1753         return 0;
1754 }
1755
1756 int __init early_acpi_boot_init(void)
1757 {
1758         /*
1759          * If acpi_disabled, bail out
1760          * One exception: acpi=ht continues far enough to enumerate LAPICs
1761          */
1762         if (acpi_disabled && !acpi_ht)
1763                 return 1;
1764
1765         /*
1766          * Process the Multiple APIC Description Table (MADT), if present
1767          */
1768         early_acpi_process_madt();
1769
1770         return 0;
1771 }
1772
1773 int __init acpi_boot_init(void)
1774 {
1775         /* those are executed after early-quirks are executed */
1776         dmi_check_system(acpi_dmi_table_late);
1777
1778         /*
1779          * If acpi_disabled, bail out
1780          * One exception: acpi=ht continues far enough to enumerate LAPICs
1781          */
1782         if (acpi_disabled && !acpi_ht)
1783                 return 1;
1784
1785         acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1786
1787         /*
1788          * set sci_int and PM timer address
1789          */
1790         acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt);
1791
1792         /*
1793          * Process the Multiple APIC Description Table (MADT), if present
1794          */
1795         acpi_process_madt();
1796
1797         acpi_table_parse(ACPI_SIG_HPET, acpi_parse_hpet);
1798
1799         return 0;
1800 }
1801
1802 static int __init parse_acpi(char *arg)
1803 {
1804         if (!arg)
1805                 return -EINVAL;
1806
1807         /* "acpi=off" disables both ACPI table parsing and interpreter */
1808         if (strcmp(arg, "off") == 0) {
1809                 disable_acpi();
1810         }
1811         /* acpi=force to over-ride black-list */
1812         else if (strcmp(arg, "force") == 0) {
1813                 acpi_force = 1;
1814                 acpi_ht = 1;
1815                 acpi_disabled = 0;
1816         }
1817         /* acpi=strict disables out-of-spec workarounds */
1818         else if (strcmp(arg, "strict") == 0) {
1819                 acpi_strict = 1;
1820         }
1821         /* Limit ACPI just to boot-time to enable HT */
1822         else if (strcmp(arg, "ht") == 0) {
1823                 if (!acpi_force)
1824                         disable_acpi();
1825                 acpi_ht = 1;
1826         }
1827         /* acpi=rsdt use RSDT instead of XSDT */
1828         else if (strcmp(arg, "rsdt") == 0) {
1829                 acpi_rsdt_forced = 1;
1830         }
1831         /* "acpi=noirq" disables ACPI interrupt routing */
1832         else if (strcmp(arg, "noirq") == 0) {
1833                 acpi_noirq_set();
1834         } else {
1835                 /* Core will printk when we return error. */
1836                 return -EINVAL;
1837         }
1838         return 0;
1839 }
1840 early_param("acpi", parse_acpi);
1841
1842 /* FIXME: Using pci= for an ACPI parameter is a travesty. */
1843 static int __init parse_pci(char *arg)
1844 {
1845         if (arg && strcmp(arg, "noacpi") == 0)
1846                 acpi_disable_pci();
1847         return 0;
1848 }
1849 early_param("pci", parse_pci);
1850
1851 int __init acpi_mps_check(void)
1852 {
1853 #if defined(CONFIG_X86_LOCAL_APIC) && !defined(CONFIG_X86_MPPARSE)
1854 /* mptable code is not built-in*/
1855         if (acpi_disabled || acpi_noirq) {
1856                 printk(KERN_WARNING "MPS support code is not built-in.\n"
1857                        "Using acpi=off or acpi=noirq or pci=noacpi "
1858                        "may have problem\n");
1859                 return 1;
1860         }
1861 #endif
1862         return 0;
1863 }
1864
1865 #ifdef CONFIG_X86_IO_APIC
1866 static int __init parse_acpi_skip_timer_override(char *arg)
1867 {
1868         acpi_skip_timer_override = 1;
1869         return 0;
1870 }
1871 early_param("acpi_skip_timer_override", parse_acpi_skip_timer_override);
1872
1873 static int __init parse_acpi_use_timer_override(char *arg)
1874 {
1875         acpi_use_timer_override = 1;
1876         return 0;
1877 }
1878 early_param("acpi_use_timer_override", parse_acpi_use_timer_override);
1879 #endif /* CONFIG_X86_IO_APIC */
1880
1881 static int __init setup_acpi_sci(char *s)
1882 {
1883         if (!s)
1884                 return -EINVAL;
1885         if (!strcmp(s, "edge"))
1886                 acpi_sci_flags =  ACPI_MADT_TRIGGER_EDGE |
1887                         (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1888         else if (!strcmp(s, "level"))
1889                 acpi_sci_flags = ACPI_MADT_TRIGGER_LEVEL |
1890                         (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1891         else if (!strcmp(s, "high"))
1892                 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_HIGH |
1893                         (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1894         else if (!strcmp(s, "low"))
1895                 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_LOW |
1896                         (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1897         else
1898                 return -EINVAL;
1899         return 0;
1900 }
1901 early_param("acpi_sci", setup_acpi_sci);
1902
1903 int __acpi_acquire_global_lock(unsigned int *lock)
1904 {
1905         unsigned int old, new, val;
1906         do {
1907                 old = *lock;
1908                 new = (((old & ~0x3) + 2) + ((old >> 1) & 0x1));
1909                 val = cmpxchg(lock, old, new);
1910         } while (unlikely (val != old));
1911         return (new < 3) ? -1 : 0;
1912 }
1913
1914 int __acpi_release_global_lock(unsigned int *lock)
1915 {
1916         unsigned int old, new, val;
1917         do {
1918                 old = *lock;
1919                 new = old & ~0x3;
1920                 val = cmpxchg(lock, old, new);
1921         } while (unlikely (val != old));
1922         return old & 0x1;
1923 }