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/slab.h>
  35 #include <linux/bootmem.h>
  36 #include <linux/ioport.h>
  37 #include <linux/pci.h>
  38
  39 #include <asm/pci_x86.h>
  40 #include <asm/pgtable.h>
  41 #include <asm/io_apic.h>
  42 #include <asm/apic.h>
  43 #include <asm/io.h>
  44 #include <asm/mpspec.h>
  45 #include <asm/smp.h>
  46
  47 static int __initdata acpi_force = 0;
  48 u32 acpi_rsdt_forced;
  49 int acpi_disabled;
  50 EXPORT_SYMBOL(acpi_disabled);
  51
  52 #ifdef  CONFIG_X86_64
  53 # include <asm/proto.h>
  54 # include <asm/numa_64.h>
  55 #endif                          /* X86 */
  56
  57 #define BAD_MADT_ENTRY(entry, end) (                                        \
  58                 (!entry) || (unsigned long)entry + sizeof(*entry) > end ||  \
  59                 ((struct acpi_subtable_header *)entry)->length < sizeof(*entry))
  60
  61 #define PREFIX                  "ACPI: "
  62
  63 int acpi_noirq;                         /* skip ACPI IRQ initialization */
  64 int acpi_pci_disabled;          /* skip ACPI PCI scan and IRQ initialization */
  65 EXPORT_SYMBOL(acpi_pci_disabled);
  66
  67 int acpi_lapic;
  68 int acpi_ioapic;
  69 int acpi_strict;
  70
  71 u8 acpi_sci_flags __initdata;
  72 int acpi_sci_override_gsi __initdata;
  73 int acpi_skip_timer_override __initdata;
  74 int acpi_use_timer_override __initdata;
  75 int acpi_fix_pin2_polarity __initdata;
  76
  77 #ifdef CONFIG_X86_LOCAL_APIC
  78 static u64 acpi_lapic_addr __initdata = APIC_DEFAULT_PHYS_BASE;
  79 #endif
  80
  81 #ifndef __HAVE_ARCH_CMPXCHG
  82 #warning ACPI uses CMPXCHG, i486 and later hardware
  83 #endif
  84
  85 /* --------------------------------------------------------------------------
  86                               Boot-time Configuration
  87    -------------------------------------------------------------------------- */
  88
  89 /*
  90  * The default interrupt routing model is PIC (8259).  This gets
  91  * overridden if IOAPICs are enumerated (below).
  92  */
  93 enum acpi_irq_model_id acpi_irq_model = ACPI_IRQ_MODEL_PIC;
  94
  95
  96 /*
  97  * ISA irqs by default are the first 16 gsis but can be
  98  * any gsi as specified by an interrupt source override.
  99  */
 100 static u32 isa_irq_to_gsi[NR_IRQS_LEGACY] __read_mostly = {
 101         0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15
 102 };
 103
 104 static unsigned int gsi_to_irq(unsigned int gsi)
 105 {
 106         unsigned int irq = gsi + NR_IRQS_LEGACY;
 107         unsigned int i;
 108
 109         for (i = 0; i < NR_IRQS_LEGACY; i++) {
 110                 if (isa_irq_to_gsi[i] == gsi) {
 111                         return i;
 112                 }
 113         }
 114
 115         /* Provide an identity mapping of gsi == irq
 116          * except on truly weird platforms that have
 117          * non isa irqs in the first 16 gsis.
 118          */
 119         if (gsi >= NR_IRQS_LEGACY)
 120                 irq = gsi;
 121         else
 122                 irq = gsi_top + gsi;
 123
 124         return irq;
 125 }
 126
 127 static u32 irq_to_gsi(int irq)
 128 {
 129         unsigned int gsi;
 130
 131         if (irq < NR_IRQS_LEGACY)
 132                 gsi = isa_irq_to_gsi[irq];
 133         else if (irq < gsi_top)
 134                 gsi = irq;
 135         else if (irq < (gsi_top + NR_IRQS_LEGACY))
 136                 gsi = irq - gsi_top;
 137         else
 138                 gsi = 0xffffffff;
 139
 140         return gsi;
 141 }
 142
 143 /*
 144  * Temporarily use the virtual area starting from FIX_IO_APIC_BASE_END,
 145  * to map the target physical address. The problem is that set_fixmap()
 146  * provides a single page, and it is possible that the page is not
 147  * sufficient.
 148  * By using this area, we can map up to MAX_IO_APICS pages temporarily,
 149  * i.e. until the next __va_range() call.
 150  *
 151  * Important Safety Note:  The fixed I/O APIC page numbers are *subtracted*
 152  * from the fixed base.  That's why we start at FIX_IO_APIC_BASE_END and
 153  * count idx down while incrementing the phys address.
 154  */
 155 char *__init __acpi_map_table(unsigned long phys, unsigned long size)
 156 {
 157
 158         if (!phys || !size)
 159                 return NULL;
 160
 161         return early_ioremap(phys, size);
 162 }
 163 void __init __acpi_unmap_table(char *map, unsigned long size)
 164 {
 165         if (!map || !size)
 166                 return;
 167
 168         early_iounmap(map, size);
 169 }
 170
 171 #ifdef CONFIG_X86_LOCAL_APIC
 172 static int __init acpi_parse_madt(struct acpi_table_header *table)
 173 {
 174         struct acpi_table_madt *madt = NULL;
 175
 176         if (!cpu_has_apic)
 177                 return -EINVAL;
 178
 179         madt = (struct acpi_table_madt *)table;
 180         if (!madt) {
 181                 printk(KERN_WARNING PREFIX "Unable to map MADT\n");
 182                 return -ENODEV;
 183         }
 184
 185         if (madt->address) {
 186                 acpi_lapic_addr = (u64) madt->address;
 187
 188                 printk(KERN_DEBUG PREFIX "Local APIC address 0x%08x\n",
 189                        madt->address);
 190         }
 191
 192         default_acpi_madt_oem_check(madt->header.oem_id,
 193                                     madt->header.oem_table_id);
 194
 195         return 0;
 196 }
 197
 198 static void __cpuinit acpi_register_lapic(int id, u8 enabled)
 199 {
 200         unsigned int ver = 0;
 201
 202         if (id >= (MAX_LOCAL_APIC-1)) {
 203                 printk(KERN_INFO PREFIX "skipped apicid that is too big\n");
 204                 return;
 205         }
 206
 207         if (!enabled) {
 208                 ++disabled_cpus;
 209                 return;
 210         }
 211
 212         if (boot_cpu_physical_apicid != -1U)
 213                 ver = apic_version[boot_cpu_physical_apicid];
 214
 215         generic_processor_info(id, ver);
 216 }
 217
 218 static int __init
 219 acpi_parse_x2apic(struct acpi_subtable_header *header, const unsigned long end)
 220 {
 221         struct acpi_madt_local_x2apic *processor = NULL;
 222
 223         processor = (struct acpi_madt_local_x2apic *)header;
 224
 225         if (BAD_MADT_ENTRY(processor, end))
 226                 return -EINVAL;
 227
 228         acpi_table_print_madt_entry(header);
 229
 230 #ifdef CONFIG_X86_X2APIC
 231         /*
 232          * We need to register disabled CPU as well to permit
 233          * counting disabled CPUs. This allows us to size
 234          * cpus_possible_map more accurately, to permit
 235          * to not preallocating memory for all NR_CPUS
 236          * when we use CPU hotplug.
 237          */
 238         acpi_register_lapic(processor->local_apic_id,   /* APIC ID */
 239                             processor->lapic_flags & ACPI_MADT_ENABLED);
 240 #else
 241         printk(KERN_WARNING PREFIX "x2apic entry ignored\n");
 242 #endif
 243
 244         return 0;
 245 }
 246
 247 static int __init
 248 acpi_parse_lapic(struct acpi_subtable_header * header, const unsigned long end)
 249 {
 250         struct acpi_madt_local_apic *processor = NULL;
 251
 252         processor = (struct acpi_madt_local_apic *)header;
 253
 254         if (BAD_MADT_ENTRY(processor, end))
 255                 return -EINVAL;
 256
 257         acpi_table_print_madt_entry(header);
 258
 259         /*
 260          * We need to register disabled CPU as well to permit
 261          * counting disabled CPUs. This allows us to size
 262          * cpus_possible_map more accurately, to permit
 263          * to not preallocating memory for all NR_CPUS
 264          * when we use CPU hotplug.
 265          */
 266         acpi_register_lapic(processor->id,      /* APIC ID */
 267                             processor->lapic_flags & ACPI_MADT_ENABLED);
 268
 269         return 0;
 270 }
 271
 272 static int __init
 273 acpi_parse_sapic(struct acpi_subtable_header *header, const unsigned long end)
 274 {
 275         struct acpi_madt_local_sapic *processor = NULL;
 276
 277         processor = (struct acpi_madt_local_sapic *)header;
 278
 279         if (BAD_MADT_ENTRY(processor, end))
 280                 return -EINVAL;
 281
 282         acpi_table_print_madt_entry(header);
 283
 284         acpi_register_lapic((processor->id << 8) | processor->eid,/* APIC ID */
 285                             processor->lapic_flags & ACPI_MADT_ENABLED);
 286
 287         return 0;
 288 }
 289
 290 static int __init
 291 acpi_parse_lapic_addr_ovr(struct acpi_subtable_header * header,
 292                           const unsigned long end)
 293 {
 294         struct acpi_madt_local_apic_override *lapic_addr_ovr = NULL;
 295
 296         lapic_addr_ovr = (struct acpi_madt_local_apic_override *)header;
 297
 298         if (BAD_MADT_ENTRY(lapic_addr_ovr, end))
 299                 return -EINVAL;
 300
 301         acpi_lapic_addr = lapic_addr_ovr->address;
 302
 303         return 0;
 304 }
 305
 306 static int __init
 307 acpi_parse_x2apic_nmi(struct acpi_subtable_header *header,
 308                       const unsigned long end)
 309 {
 310         struct acpi_madt_local_x2apic_nmi *x2apic_nmi = NULL;
 311
 312         x2apic_nmi = (struct acpi_madt_local_x2apic_nmi *)header;
 313
 314         if (BAD_MADT_ENTRY(x2apic_nmi, end))
 315                 return -EINVAL;
 316
 317         acpi_table_print_madt_entry(header);
 318
 319         if (x2apic_nmi->lint != 1)
 320                 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n");
 321
 322         return 0;
 323 }
 324
 325 static int __init
 326 acpi_parse_lapic_nmi(struct acpi_subtable_header * header, const unsigned long end)
 327 {
 328         struct acpi_madt_local_apic_nmi *lapic_nmi = NULL;
 329
 330         lapic_nmi = (struct acpi_madt_local_apic_nmi *)header;
 331
 332         if (BAD_MADT_ENTRY(lapic_nmi, end))
 333                 return -EINVAL;
 334
 335         acpi_table_print_madt_entry(header);
 336
 337         if (lapic_nmi->lint != 1)
 338                 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n");
 339
 340         return 0;
 341 }
 342
 343 #endif                          /*CONFIG_X86_LOCAL_APIC */
 344
 345 #ifdef CONFIG_X86_IO_APIC
 346
 347 static int __init
 348 acpi_parse_ioapic(struct acpi_subtable_header * header, const unsigned long end)
 349 {
 350         struct acpi_madt_io_apic *ioapic = NULL;
 351
 352         ioapic = (struct acpi_madt_io_apic *)header;
 353
 354         if (BAD_MADT_ENTRY(ioapic, end))
 355                 return -EINVAL;
 356
 357         acpi_table_print_madt_entry(header);
 358
 359         mp_register_ioapic(ioapic->id,
 360                            ioapic->address, ioapic->global_irq_base);
 361
 362         return 0;
 363 }
 364
 365 /*
 366  * Parse Interrupt Source Override for the ACPI SCI
 367  */
 368 static void __init acpi_sci_ioapic_setup(u8 bus_irq, u16 polarity, u16 trigger, u32 gsi)
 369 {
 370         if (trigger == 0)       /* compatible SCI trigger is level */
 371                 trigger = 3;
 372
 373         if (polarity == 0)      /* compatible SCI polarity is low */
 374                 polarity = 3;
 375
 376         /* Command-line over-ride via acpi_sci= */
 377         if (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK)
 378                 trigger = (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2;
 379
 380         if (acpi_sci_flags & ACPI_MADT_POLARITY_MASK)
 381                 polarity = acpi_sci_flags & ACPI_MADT_POLARITY_MASK;
 382
 383         /*
 384          * mp_config_acpi_legacy_irqs() already setup IRQs < 16
 385          * If GSI is < 16, this will update its flags,
 386          * else it will create a new mp_irqs[] entry.
 387          */
 388         mp_override_legacy_irq(bus_irq, polarity, trigger, gsi);
 389
 390         /*
 391          * stash over-ride to indicate we've been here
 392          * and for later update of acpi_gbl_FADT
 393          */
 394         acpi_sci_override_gsi = gsi;
 395         return;
 396 }
 397
 398 static int __init
 399 acpi_parse_int_src_ovr(struct acpi_subtable_header * header,
 400                        const unsigned long end)
 401 {
 402         struct acpi_madt_interrupt_override *intsrc = NULL;
 403
 404         intsrc = (struct acpi_madt_interrupt_override *)header;
 405
 406         if (BAD_MADT_ENTRY(intsrc, end))
 407                 return -EINVAL;
 408
 409         acpi_table_print_madt_entry(header);
 410
 411         if (intsrc->source_irq == acpi_gbl_FADT.sci_interrupt) {
 412                 acpi_sci_ioapic_setup(intsrc->source_irq,
 413                                       intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
 414                                       (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2,
 415                                       intsrc->global_irq);
 416                 return 0;
 417         }
 418
 419         if (intsrc->source_irq == 0 && intsrc->global_irq == 2) {
 420                 if (acpi_skip_timer_override) {
 421                         printk(PREFIX "BIOS IRQ0 pin2 override ignored.\n");
 422                         return 0;
 423                 }
 424                 if (acpi_fix_pin2_polarity && (intsrc->inti_flags & ACPI_MADT_POLARITY_MASK)) {
 425                         intsrc->inti_flags &= ~ACPI_MADT_POLARITY_MASK;
 426                         printk(PREFIX "BIOS IRQ0 pin2 override: forcing polarity to high active.\n");
 427                 }
 428         }
 429
 430         mp_override_legacy_irq(intsrc->source_irq,
 431                                 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
 432                                 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2,
 433                                 intsrc->global_irq);
 434
 435         return 0;
 436 }
 437
 438 static int __init
 439 acpi_parse_nmi_src(struct acpi_subtable_header * header, const unsigned long end)
 440 {
 441         struct acpi_madt_nmi_source *nmi_src = NULL;
 442
 443         nmi_src = (struct acpi_madt_nmi_source *)header;
 444
 445         if (BAD_MADT_ENTRY(nmi_src, end))
 446                 return -EINVAL;
 447
 448         acpi_table_print_madt_entry(header);
 449
 450         /* TBD: Support nimsrc entries? */
 451
 452         return 0;
 453 }
 454
 455 #endif                          /* CONFIG_X86_IO_APIC */
 456
 457 /*
 458  * acpi_pic_sci_set_trigger()
 459  *
 460  * use ELCR to set PIC-mode trigger type for SCI
 461  *
 462  * If a PIC-mode SCI is not recognized or gives spurious IRQ7's
 463  * it may require Edge Trigger -- use "acpi_sci=edge"
 464  *
 465  * Port 0x4d0-4d1 are ECLR1 and ECLR2, the Edge/Level Control Registers
 466  * for the 8259 PIC.  bit[n] = 1 means irq[n] is Level, otherwise Edge.
 467  * ECLR1 is IRQs 0-7 (IRQ 0, 1, 2 must be 0)
 468  * ECLR2 is IRQs 8-15 (IRQ 8, 13 must be 0)
 469  */
 470
 471 void __init acpi_pic_sci_set_trigger(unsigned int irq, u16 trigger)
 472 {
 473         unsigned int mask = 1 << irq;
 474         unsigned int old, new;
 475
 476         /* Real old ELCR mask */
 477         old = inb(0x4d0) | (inb(0x4d1) << 8);
 478
 479         /*
 480          * If we use ACPI to set PCI IRQs, then we should clear ELCR
 481          * since we will set it correctly as we enable the PCI irq
 482          * routing.
 483          */
 484         new = acpi_noirq ? old : 0;
 485
 486         /*
 487          * Update SCI information in the ELCR, it isn't in the PCI
 488          * routing tables..
 489          */
 490         switch (trigger) {
 491         case 1:         /* Edge - clear */
 492                 new &= ~mask;
 493                 break;
 494         case 3:         /* Level - set */
 495                 new |= mask;
 496                 break;
 497         }
 498
 499         if (old == new)
 500                 return;
 501
 502         printk(PREFIX "setting ELCR to %04x (from %04x)\n", new, old);
 503         outb(new, 0x4d0);
 504         outb(new >> 8, 0x4d1);
 505 }
 506
 507 int acpi_gsi_to_irq(u32 gsi, unsigned int *irq)
 508 {
 509         *irq = gsi_to_irq(gsi);
 510
 511 #ifdef CONFIG_X86_IO_APIC
 512         if (acpi_irq_model == ACPI_IRQ_MODEL_IOAPIC)
 513                 setup_IO_APIC_irq_extra(gsi);
 514 #endif
 515
 516         return 0;
 517 }
 518 EXPORT_SYMBOL_GPL(acpi_gsi_to_irq);
 519
 520 int acpi_isa_irq_to_gsi(unsigned isa_irq, u32 *gsi)
 521 {
 522         if (isa_irq >= 16)
 523                 return -1;
 524         *gsi = irq_to_gsi(isa_irq);
 525         return 0;
 526 }
 527
 528 static int acpi_register_gsi_pic(struct device *dev, u32 gsi,
 529                                  int trigger, int polarity)
 530 {
 531 #ifdef CONFIG_PCI
 532         /*
 533          * Make sure all (legacy) PCI IRQs are set as level-triggered.
 534          */
 535         if (trigger == ACPI_LEVEL_SENSITIVE)
 536                 eisa_set_level_irq(gsi);
 537 #endif
 538
 539         return gsi;
 540 }
 541
 542 static int acpi_register_gsi_ioapic(struct device *dev, u32 gsi,
 543                                     int trigger, int polarity)
 544 {
 545 #ifdef CONFIG_X86_IO_APIC
 546         gsi = mp_register_gsi(dev, gsi, trigger, polarity);
 547 #endif
 548
 549         return gsi;
 550 }
 551
 552 int (*__acpi_register_gsi)(struct device *dev, u32 gsi,
 553                            int trigger, int polarity) = acpi_register_gsi_pic;
 554
 555 /*
 556  * success: return IRQ number (>=0)
 557  * failure: return < 0
 558  */
 559 int acpi_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity)
 560 {
 561         unsigned int irq;
 562         unsigned int plat_gsi = gsi;
 563
 564         plat_gsi = (*__acpi_register_gsi)(dev, gsi, trigger, polarity);
 565         irq = gsi_to_irq(plat_gsi);
 566
 567         return irq;
 568 }
 569
 570 void __init acpi_set_irq_model_pic(void)
 571 {
 572         acpi_irq_model = ACPI_IRQ_MODEL_PIC;
 573         __acpi_register_gsi = acpi_register_gsi_pic;
 574         acpi_ioapic = 0;
 575 }
 576
 577 void __init acpi_set_irq_model_ioapic(void)
 578 {
 579         acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC;
 580         __acpi_register_gsi = acpi_register_gsi_ioapic;
 581         acpi_ioapic = 1;
 582 }
 583
 584 /*
 585  *  ACPI based hotplug support for CPU
 586  */
 587 #ifdef CONFIG_ACPI_HOTPLUG_CPU
 588 #include <acpi/processor.h>
 589
 590 static void acpi_map_cpu2node(acpi_handle handle, int cpu, int physid)
 591 {
 592 #ifdef CONFIG_ACPI_NUMA
 593         int nid;
 594
 595         nid = acpi_get_node(handle);
 596         if (nid == -1 || !node_online(nid))
 597                 return;
 598         set_apicid_to_node(physid, nid);
 599         numa_set_node(cpu, nid);
 600 #endif
 601 }
 602
 603 static int __cpuinit _acpi_map_lsapic(acpi_handle handle, int *pcpu)
 604 {
 605         struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
 606         union acpi_object *obj;
 607         struct acpi_madt_local_apic *lapic;
 608         cpumask_var_t tmp_map, new_map;
 609         u8 physid;
 610         int cpu;
 611         int retval = -ENOMEM;
 612
 613         if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer)))
 614                 return -EINVAL;
 615
 616         if (!buffer.length || !buffer.pointer)
 617                 return -EINVAL;
 618
 619         obj = buffer.pointer;
 620         if (obj->type != ACPI_TYPE_BUFFER ||
 621             obj->buffer.length < sizeof(*lapic)) {
 622                 kfree(buffer.pointer);
 623                 return -EINVAL;
 624         }
 625
 626         lapic = (struct acpi_madt_local_apic *)obj->buffer.pointer;
 627
 628         if (lapic->header.type != ACPI_MADT_TYPE_LOCAL_APIC ||
 629             !(lapic->lapic_flags & ACPI_MADT_ENABLED)) {
 630                 kfree(buffer.pointer);
 631                 return -EINVAL;
 632         }
 633
 634         physid = lapic->id;
 635
 636         kfree(buffer.pointer);
 637         buffer.length = ACPI_ALLOCATE_BUFFER;
 638         buffer.pointer = NULL;
 639
 640         if (!alloc_cpumask_var(&tmp_map, GFP_KERNEL))
 641                 goto out;
 642
 643         if (!alloc_cpumask_var(&new_map, GFP_KERNEL))
 644                 goto free_tmp_map;
 645
 646         cpumask_copy(tmp_map, cpu_present_mask);
 647         acpi_register_lapic(physid, lapic->lapic_flags & ACPI_MADT_ENABLED);
 648
 649         /*
 650          * If mp_register_lapic successfully generates a new logical cpu
 651          * number, then the following will get us exactly what was mapped
 652          */
 653         cpumask_andnot(new_map, cpu_present_mask, tmp_map);
 654         if (cpumask_empty(new_map)) {
 655                 printk ("Unable to map lapic to logical cpu number\n");
 656                 retval = -EINVAL;
 657                 goto free_new_map;
 658         }
 659
 660         acpi_processor_set_pdc(handle);
 661
 662         cpu = cpumask_first(new_map);
 663         acpi_map_cpu2node(handle, cpu, physid);
 664
 665         *pcpu = cpu;
 666         retval = 0;
 667
 668 free_new_map:
 669         free_cpumask_var(new_map);
 670 free_tmp_map:
 671         free_cpumask_var(tmp_map);
 672 out:
 673         return retval;
 674 }
 675
 676 /* wrapper to silence section mismatch warning */
 677 int __ref acpi_map_lsapic(acpi_handle handle, int *pcpu)
 678 {
 679         return _acpi_map_lsapic(handle, pcpu);
 680 }
 681 EXPORT_SYMBOL(acpi_map_lsapic);
 682
 683 int acpi_unmap_lsapic(int cpu)
 684 {
 685         per_cpu(x86_cpu_to_apicid, cpu) = -1;
 686         set_cpu_present(cpu, false);
 687         num_processors--;
 688
 689         return (0);
 690 }
 691
 692 EXPORT_SYMBOL(acpi_unmap_lsapic);
 693 #endif                          /* CONFIG_ACPI_HOTPLUG_CPU */
 694
 695 int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base)
 696 {
 697         /* TBD */
 698         return -EINVAL;
 699 }
 700
 701 EXPORT_SYMBOL(acpi_register_ioapic);
 702
 703 int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base)
 704 {
 705         /* TBD */
 706         return -EINVAL;
 707 }
 708
 709 EXPORT_SYMBOL(acpi_unregister_ioapic);
 710
 711 static int __init acpi_parse_sbf(struct acpi_table_header *table)
 712 {
 713         struct acpi_table_boot *sb;
 714
 715         sb = (struct acpi_table_boot *)table;
 716         if (!sb) {
 717                 printk(KERN_WARNING PREFIX "Unable to map SBF\n");
 718                 return -ENODEV;
 719         }
 720
 721         sbf_port = sb->cmos_index;      /* Save CMOS port */
 722
 723         return 0;
 724 }
 725
 726 #ifdef CONFIG_HPET_TIMER
 727 #include <asm/hpet.h>
 728
 729 static struct __initdata resource *hpet_res;
 730
 731 static int __init acpi_parse_hpet(struct acpi_table_header *table)
 732 {
 733         struct acpi_table_hpet *hpet_tbl;
 734
 735         hpet_tbl = (struct acpi_table_hpet *)table;
 736         if (!hpet_tbl) {
 737                 printk(KERN_WARNING PREFIX "Unable to map HPET\n");
 738                 return -ENODEV;
 739         }
 740
 741         if (hpet_tbl->address.space_id != ACPI_SPACE_MEM) {
 742                 printk(KERN_WARNING PREFIX "HPET timers must be located in "
 743                        "memory.\n");
 744                 return -1;
 745         }
 746
 747         hpet_address = hpet_tbl->address.address;
 748         hpet_blockid = hpet_tbl->sequence;
 749
 750         /*
 751          * Some broken BIOSes advertise HPET at 0x0. We really do not
 752          * want to allocate a resource there.
 753          */
 754         if (!hpet_address) {
 755                 printk(KERN_WARNING PREFIX
 756                        "HPET id: %#x base: %#lx is invalid\n",
 757                        hpet_tbl->id, hpet_address);
 758                 return 0;
 759         }
 760 #ifdef CONFIG_X86_64
 761         /*
 762          * Some even more broken BIOSes advertise HPET at
 763          * 0xfed0000000000000 instead of 0xfed00000. Fix it up and add
 764          * some noise:
 765          */
 766         if (hpet_address == 0xfed0000000000000UL) {
 767                 if (!hpet_force_user) {
 768                         printk(KERN_WARNING PREFIX "HPET id: %#x "
 769                                "base: 0xfed0000000000000 is bogus\n "
 770                                "try hpet=force on the kernel command line to "
 771                                "fix it up to 0xfed00000.\n", hpet_tbl->id);
 772                         hpet_address = 0;
 773                         return 0;
 774                 }
 775                 printk(KERN_WARNING PREFIX
 776                        "HPET id: %#x base: 0xfed0000000000000 fixed up "
 777                        "to 0xfed00000.\n", hpet_tbl->id);
 778                 hpet_address >>= 32;
 779         }
 780 #endif
 781         printk(KERN_INFO PREFIX "HPET id: %#x base: %#lx\n",
 782                hpet_tbl->id, hpet_address);
 783
 784         /*
 785          * Allocate and initialize the HPET firmware resource for adding into
 786          * the resource tree during the lateinit timeframe.
 787          */
 788 #define HPET_RESOURCE_NAME_SIZE 9
 789         hpet_res = alloc_bootmem(sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE);
 790
 791         hpet_res->name = (void *)&hpet_res[1];
 792         hpet_res->flags = IORESOURCE_MEM;
 793         snprintf((char *)hpet_res->name, HPET_RESOURCE_NAME_SIZE, "HPET %u",
 794                  hpet_tbl->sequence);
 795
 796         hpet_res->start = hpet_address;
 797         hpet_res->end = hpet_address + (1 * 1024) - 1;
 798
 799         return 0;
 800 }
 801
 802 /*
 803  * hpet_insert_resource inserts the HPET resources used into the resource
 804  * tree.
 805  */
 806 static __init int hpet_insert_resource(void)
 807 {
 808         if (!hpet_res)
 809                 return 1;
 810
 811         return insert_resource(&iomem_resource, hpet_res);
 812 }
 813
 814 late_initcall(hpet_insert_resource);
 815
 816 #else
 817 #define acpi_parse_hpet NULL
 818 #endif
 819
 820 static int __init acpi_parse_fadt(struct acpi_table_header *table)
 821 {
 822
 823 #ifdef CONFIG_X86_PM_TIMER
 824         /* detect the location of the ACPI PM Timer */
 825         if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID) {
 826                 /* FADT rev. 2 */
 827                 if (acpi_gbl_FADT.xpm_timer_block.space_id !=
 828                     ACPI_ADR_SPACE_SYSTEM_IO)
 829                         return 0;
 830
 831                 pmtmr_ioport = acpi_gbl_FADT.xpm_timer_block.address;
 832                 /*
 833                  * "X" fields are optional extensions to the original V1.0
 834                  * fields, so we must selectively expand V1.0 fields if the
 835                  * corresponding X field is zero.
 836                  */
 837                 if (!pmtmr_ioport)
 838                         pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
 839         } else {
 840                 /* FADT rev. 1 */
 841                 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
 842         }
 843         if (pmtmr_ioport)
 844                 printk(KERN_INFO PREFIX "PM-Timer IO Port: %#x\n",
 845                        pmtmr_ioport);
 846 #endif
 847         return 0;
 848 }
 849
 850 #ifdef  CONFIG_X86_LOCAL_APIC
 851 /*
 852  * Parse LAPIC entries in MADT
 853  * returns 0 on success, < 0 on error
 854  */
 855
 856 static int __init early_acpi_parse_madt_lapic_addr_ovr(void)
 857 {
 858         int count;
 859
 860         if (!cpu_has_apic)
 861                 return -ENODEV;
 862
 863         /*
 864          * Note that the LAPIC address is obtained from the MADT (32-bit value)
 865          * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value).
 866          */
 867
 868         count =
 869             acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
 870                                   acpi_parse_lapic_addr_ovr, 0);
 871         if (count < 0) {
 872                 printk(KERN_ERR PREFIX
 873                        "Error parsing LAPIC address override entry\n");
 874                 return count;
 875         }
 876
 877         register_lapic_address(acpi_lapic_addr);
 878
 879         return count;
 880 }
 881
 882 static int __init acpi_parse_madt_lapic_entries(void)
 883 {
 884         int count;
 885         int x2count = 0;
 886
 887         if (!cpu_has_apic)
 888                 return -ENODEV;
 889
 890         /*
 891          * Note that the LAPIC address is obtained from the MADT (32-bit value)
 892          * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value).
 893          */
 894
 895         count =
 896             acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
 897                                   acpi_parse_lapic_addr_ovr, 0);
 898         if (count < 0) {
 899                 printk(KERN_ERR PREFIX
 900                        "Error parsing LAPIC address override entry\n");
 901                 return count;
 902         }
 903
 904         register_lapic_address(acpi_lapic_addr);
 905
 906         count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC,
 907                                       acpi_parse_sapic, MAX_LOCAL_APIC);
 908
 909         if (!count) {
 910                 x2count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC,
 911                                         acpi_parse_x2apic, MAX_LOCAL_APIC);
 912                 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC,
 913                                         acpi_parse_lapic, MAX_LOCAL_APIC);
 914         }
 915         if (!count && !x2count) {
 916                 printk(KERN_ERR PREFIX "No LAPIC entries present\n");
 917                 /* TBD: Cleanup to allow fallback to MPS */
 918                 return -ENODEV;
 919         } else if (count < 0 || x2count < 0) {
 920                 printk(KERN_ERR PREFIX "Error parsing LAPIC entry\n");
 921                 /* TBD: Cleanup to allow fallback to MPS */
 922                 return count;
 923         }
 924
 925         x2count =
 926             acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC_NMI,
 927                                   acpi_parse_x2apic_nmi, 0);
 928         count =
 929             acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI, acpi_parse_lapic_nmi, 0);
 930         if (count < 0 || x2count < 0) {
 931                 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n");
 932                 /* TBD: Cleanup to allow fallback to MPS */
 933                 return count;
 934         }
 935         return 0;
 936 }
 937 #endif                          /* CONFIG_X86_LOCAL_APIC */
 938
 939 #ifdef  CONFIG_X86_IO_APIC
 940 #define MP_ISA_BUS              0
 941
 942 #ifdef CONFIG_X86_ES7000
 943 extern int es7000_plat;
 944 #endif
 945
 946 void __init mp_override_legacy_irq(u8 bus_irq, u8 polarity, u8 trigger, u32 gsi)
 947 {
 948         int ioapic;
 949         int pin;
 950         struct mpc_intsrc mp_irq;
 951
 952         /*
 953          * Convert 'gsi' to 'ioapic.pin'.
 954          */
 955         ioapic = mp_find_ioapic(gsi);
 956         if (ioapic < 0)
 957                 return;
 958         pin = mp_find_ioapic_pin(ioapic, gsi);
 959
 960         /*
 961          * TBD: This check is for faulty timer entries, where the override
 962          *      erroneously sets the trigger to level, resulting in a HUGE
 963          *      increase of timer interrupts!
 964          */
 965         if ((bus_irq == 0) && (trigger == 3))
 966                 trigger = 1;
 967
 968         mp_irq.type = MP_INTSRC;
 969         mp_irq.irqtype = mp_INT;
 970         mp_irq.irqflag = (trigger << 2) | polarity;
 971         mp_irq.srcbus = MP_ISA_BUS;
 972         mp_irq.srcbusirq = bus_irq;     /* IRQ */
 973         mp_irq.dstapic = mpc_ioapic_id(ioapic); /* APIC ID */
 974         mp_irq.dstirq = pin;    /* INTIN# */
 975
 976         mp_save_irq(&mp_irq);
 977
 978         isa_irq_to_gsi[bus_irq] = gsi;
 979 }
 980
 981 void __init mp_config_acpi_legacy_irqs(void)
 982 {
 983         int i;
 984         struct mpc_intsrc mp_irq;
 985
 986 #if defined (CONFIG_MCA) || defined (CONFIG_EISA)
 987         /*
 988          * Fabricate the legacy ISA bus (bus #31).
 989          */
 990         mp_bus_id_to_type[MP_ISA_BUS] = MP_BUS_ISA;
 991 #endif
 992         set_bit(MP_ISA_BUS, mp_bus_not_pci);
 993         pr_debug("Bus #%d is ISA\n", MP_ISA_BUS);
 994
 995 #ifdef CONFIG_X86_ES7000
 996         /*
 997          * Older generations of ES7000 have no legacy identity mappings
 998          */
 999         if (es7000_plat == 1)
1000                 return;
1001 #endif
1002
1003         /*
1004          * Use the default configuration for the IRQs 0-15.  Unless
1005          * overridden by (MADT) interrupt source override entries.
1006          */
1007         for (i = 0; i < 16; i++) {
1008                 int ioapic, pin;
1009                 unsigned int dstapic;
1010                 int idx;
1011                 u32 gsi;
1012
1013                 /* Locate the gsi that irq i maps to. */
1014                 if (acpi_isa_irq_to_gsi(i, &gsi))
1015                         continue;
1016
1017                 /*
1018                  * Locate the IOAPIC that manages the ISA IRQ.
1019                  */
1020                 ioapic = mp_find_ioapic(gsi);
1021                 if (ioapic < 0)
1022                         continue;
1023                 pin = mp_find_ioapic_pin(ioapic, gsi);
1024                 dstapic = mpc_ioapic_id(ioapic);
1025
1026                 for (idx = 0; idx < mp_irq_entries; idx++) {
1027                         struct mpc_intsrc *irq = mp_irqs + idx;
1028
1029                         /* Do we already have a mapping for this ISA IRQ? */
1030                         if (irq->srcbus == MP_ISA_BUS && irq->srcbusirq == i)
1031                                 break;
1032
1033                         /* Do we already have a mapping for this IOAPIC pin */
1034                         if (irq->dstapic == dstapic && irq->dstirq == pin)
1035                                 break;
1036                 }
1037
1038                 if (idx != mp_irq_entries) {
1039                         printk(KERN_DEBUG "ACPI: IRQ%d used by override.\n", i);
1040                         continue;       /* IRQ already used */
1041                 }
1042
1043                 mp_irq.type = MP_INTSRC;
1044                 mp_irq.irqflag = 0;     /* Conforming */
1045                 mp_irq.srcbus = MP_ISA_BUS;
1046                 mp_irq.dstapic = dstapic;
1047                 mp_irq.irqtype = mp_INT;
1048                 mp_irq.srcbusirq = i; /* Identity mapped */
1049                 mp_irq.dstirq = pin;
1050
1051                 mp_save_irq(&mp_irq);
1052         }
1053 }
1054
1055 static int mp_config_acpi_gsi(struct device *dev, u32 gsi, int trigger,
1056                         int polarity)
1057 {
1058 #ifdef CONFIG_X86_MPPARSE
1059         struct mpc_intsrc mp_irq;
1060         struct pci_dev *pdev;
1061         unsigned char number;
1062         unsigned int devfn;
1063         int ioapic;
1064         u8 pin;
1065
1066         if (!acpi_ioapic)
1067                 return 0;
1068         if (!dev)
1069                 return 0;
1070         if (dev->bus != &pci_bus_type)
1071                 return 0;
1072
1073         pdev = to_pci_dev(dev);
1074         number = pdev->bus->number;
1075         devfn = pdev->devfn;
1076         pin = pdev->pin;
1077         /* print the entry should happen on mptable identically */
1078         mp_irq.type = MP_INTSRC;
1079         mp_irq.irqtype = mp_INT;
1080         mp_irq.irqflag = (trigger == ACPI_EDGE_SENSITIVE ? 4 : 0x0c) |
1081                                 (polarity == ACPI_ACTIVE_HIGH ? 1 : 3);
1082         mp_irq.srcbus = number;
1083         mp_irq.srcbusirq = (((devfn >> 3) & 0x1f) << 2) | ((pin - 1) & 3);
1084         ioapic = mp_find_ioapic(gsi);
1085         mp_irq.dstapic = mpc_ioapic_id(ioapic);
1086         mp_irq.dstirq = mp_find_ioapic_pin(ioapic, gsi);
1087
1088         mp_save_irq(&mp_irq);
1089 #endif
1090         return 0;
1091 }
1092
1093 int mp_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity)
1094 {
1095         int ioapic;
1096         int ioapic_pin;
1097         struct io_apic_irq_attr irq_attr;
1098
1099         if (acpi_irq_model != ACPI_IRQ_MODEL_IOAPIC)
1100                 return gsi;
1101
1102         /* Don't set up the ACPI SCI because it's already set up */
1103         if (acpi_gbl_FADT.sci_interrupt == gsi)
1104                 return gsi;
1105
1106         ioapic = mp_find_ioapic(gsi);
1107         if (ioapic < 0) {
1108                 printk(KERN_WARNING "No IOAPIC for GSI %u\n", gsi);
1109                 return gsi;
1110         }
1111
1112         ioapic_pin = mp_find_ioapic_pin(ioapic, gsi);
1113
1114         if (ioapic_pin > MP_MAX_IOAPIC_PIN) {
1115                 printk(KERN_ERR "Invalid reference to IOAPIC pin "
1116                        "%d-%d\n", mpc_ioapic_id(ioapic),
1117                        ioapic_pin);
1118                 return gsi;
1119         }
1120
1121         if (enable_update_mptable)
1122                 mp_config_acpi_gsi(dev, gsi, trigger, polarity);
1123
1124         set_io_apic_irq_attr(&irq_attr, ioapic, ioapic_pin,
1125                              trigger == ACPI_EDGE_SENSITIVE ? 0 : 1,
1126                              polarity == ACPI_ACTIVE_HIGH ? 0 : 1);
1127         io_apic_set_pci_routing(dev, gsi_to_irq(gsi), &irq_attr);
1128
1129         return gsi;
1130 }
1131
1132 /*
1133  * Parse IOAPIC related entries in MADT
1134  * returns 0 on success, < 0 on error
1135  */
1136 static int __init acpi_parse_madt_ioapic_entries(void)
1137 {
1138         int count;
1139
1140         /*
1141          * ACPI interpreter is required to complete interrupt setup,
1142          * so if it is off, don't enumerate the io-apics with ACPI.
1143          * If MPS is present, it will handle them,
1144          * otherwise the system will stay in PIC mode
1145          */
1146         if (acpi_disabled || acpi_noirq)
1147                 return -ENODEV;
1148
1149         if (!cpu_has_apic)
1150                 return -ENODEV;
1151
1152         /*
1153          * if "noapic" boot option, don't look for IO-APICs
1154          */
1155         if (skip_ioapic_setup) {
1156                 printk(KERN_INFO PREFIX "Skipping IOAPIC probe "
1157                        "due to 'noapic' option.\n");
1158                 return -ENODEV;
1159         }
1160
1161         count =
1162             acpi_table_parse_madt(ACPI_MADT_TYPE_IO_APIC, acpi_parse_ioapic,
1163                                   MAX_IO_APICS);
1164         if (!count) {
1165                 printk(KERN_ERR PREFIX "No IOAPIC entries present\n");
1166                 return -ENODEV;
1167         } else if (count < 0) {
1168                 printk(KERN_ERR PREFIX "Error parsing IOAPIC entry\n");
1169                 return count;
1170         }
1171
1172         count =
1173             acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE, acpi_parse_int_src_ovr,
1174                                   nr_irqs);
1175         if (count < 0) {
1176                 printk(KERN_ERR PREFIX
1177                        "Error parsing interrupt source overrides entry\n");
1178                 /* TBD: Cleanup to allow fallback to MPS */
1179                 return count;
1180         }
1181
1182         /*
1183          * If BIOS did not supply an INT_SRC_OVR for the SCI
1184          * pretend we got one so we can set the SCI flags.
1185          */
1186         if (!acpi_sci_override_gsi)
1187                 acpi_sci_ioapic_setup(acpi_gbl_FADT.sci_interrupt, 0, 0,
1188                                       acpi_gbl_FADT.sci_interrupt);
1189
1190         /* Fill in identity legacy mappings where no override */
1191         mp_config_acpi_legacy_irqs();
1192
1193         count =
1194             acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE, acpi_parse_nmi_src,
1195                                   nr_irqs);
1196         if (count < 0) {
1197                 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n");
1198                 /* TBD: Cleanup to allow fallback to MPS */
1199                 return count;
1200         }
1201
1202         return 0;
1203 }
1204 #else
1205 static inline int acpi_parse_madt_ioapic_entries(void)
1206 {
1207         return -1;
1208 }
1209 #endif  /* !CONFIG_X86_IO_APIC */
1210
1211 static void __init early_acpi_process_madt(void)
1212 {
1213 #ifdef CONFIG_X86_LOCAL_APIC
1214         int error;
1215
1216         if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1217
1218                 /*
1219                  * Parse MADT LAPIC entries
1220                  */
1221                 error = early_acpi_parse_madt_lapic_addr_ovr();
1222                 if (!error) {
1223                         acpi_lapic = 1;
1224                         smp_found_config = 1;
1225                 }
1226                 if (error == -EINVAL) {
1227                         /*
1228                          * Dell Precision Workstation 410, 610 come here.
1229                          */
1230                         printk(KERN_ERR PREFIX
1231                                "Invalid BIOS MADT, disabling ACPI\n");
1232                         disable_acpi();
1233                 }
1234         }
1235 #endif
1236 }
1237
1238 static void __init acpi_process_madt(void)
1239 {
1240 #ifdef CONFIG_X86_LOCAL_APIC
1241         int error;
1242
1243         if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1244
1245                 /*
1246                  * Parse MADT LAPIC entries
1247                  */
1248                 error = acpi_parse_madt_lapic_entries();
1249                 if (!error) {
1250                         acpi_lapic = 1;
1251
1252                         /*
1253                          * Parse MADT IO-APIC entries
1254                          */
1255                         error = acpi_parse_madt_ioapic_entries();
1256                         if (!error) {
1257                                 acpi_set_irq_model_ioapic();
1258
1259                                 smp_found_config = 1;
1260                         }
1261                 }
1262                 if (error == -EINVAL) {
1263                         /*
1264                          * Dell Precision Workstation 410, 610 come here.
1265                          */
1266                         printk(KERN_ERR PREFIX
1267                                "Invalid BIOS MADT, disabling ACPI\n");
1268                         disable_acpi();
1269                 }
1270         } else {
1271                 /*
1272                  * ACPI found no MADT, and so ACPI wants UP PIC mode.
1273                  * In the event an MPS table was found, forget it.
1274                  * Boot with "acpi=off" to use MPS on such a system.
1275                  */
1276                 if (smp_found_config) {
1277                         printk(KERN_WARNING PREFIX
1278                                 "No APIC-table, disabling MPS\n");
1279                         smp_found_config = 0;
1280                 }
1281         }
1282
1283         /*
1284          * ACPI supports both logical (e.g. Hyper-Threading) and physical
1285          * processors, where MPS only supports physical.
1286          */
1287         if (acpi_lapic && acpi_ioapic)
1288                 printk(KERN_INFO "Using ACPI (MADT) for SMP configuration "
1289                        "information\n");
1290         else if (acpi_lapic)
1291                 printk(KERN_INFO "Using ACPI for processor (LAPIC) "
1292                        "configuration information\n");
1293 #endif
1294         return;
1295 }
1296
1297 static int __init disable_acpi_irq(const struct dmi_system_id *d)
1298 {
1299         if (!acpi_force) {
1300                 printk(KERN_NOTICE "%s detected: force use of acpi=noirq\n",
1301                        d->ident);
1302                 acpi_noirq_set();
1303         }
1304         return 0;
1305 }
1306
1307 static int __init disable_acpi_pci(const struct dmi_system_id *d)
1308 {
1309         if (!acpi_force) {
1310                 printk(KERN_NOTICE "%s detected: force use of pci=noacpi\n",
1311                        d->ident);
1312                 acpi_disable_pci();
1313         }
1314         return 0;
1315 }
1316
1317 static int __init dmi_disable_acpi(const struct dmi_system_id *d)
1318 {
1319         if (!acpi_force) {
1320                 printk(KERN_NOTICE "%s detected: acpi off\n", d->ident);
1321                 disable_acpi();
1322         } else {
1323                 printk(KERN_NOTICE
1324                        "Warning: DMI blacklist says broken, but acpi forced\n");
1325         }
1326         return 0;
1327 }
1328
1329 /*
1330  * Force ignoring BIOS IRQ0 pin2 override
1331  */
1332 static int __init dmi_ignore_irq0_timer_override(const struct dmi_system_id *d)
1333 {
1334         /*
1335          * The ati_ixp4x0_rev() early PCI quirk should have set
1336          * the acpi_skip_timer_override flag already:
1337          */
1338         if (!acpi_skip_timer_override) {
1339                 WARN(1, KERN_ERR "ati_ixp4x0 quirk not complete.\n");
1340                 pr_notice("%s detected: Ignoring BIOS IRQ0 pin2 override\n",
1341                         d->ident);
1342                 acpi_skip_timer_override = 1;
1343         }
1344         return 0;
1345 }
1346
1347 /*
1348  * If your system is blacklisted here, but you find that acpi=force
1349  * works for you, please contact linux-acpi@vger.kernel.org
1350  */
1351 static struct dmi_system_id __initdata acpi_dmi_table[] = {
1352         /*
1353          * Boxes that need ACPI disabled
1354          */
1355         {
1356          .callback = dmi_disable_acpi,
1357          .ident = "IBM Thinkpad",
1358          .matches = {
1359                      DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1360                      DMI_MATCH(DMI_BOARD_NAME, "2629H1G"),
1361                      },
1362          },
1363
1364         /*
1365          * Boxes that need ACPI PCI IRQ routing disabled
1366          */
1367         {
1368          .callback = disable_acpi_irq,
1369          .ident = "ASUS A7V",
1370          .matches = {
1371                      DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC"),
1372                      DMI_MATCH(DMI_BOARD_NAME, "<A7V>"),
1373                      /* newer BIOS, Revision 1011, does work */
1374                      DMI_MATCH(DMI_BIOS_VERSION,
1375                                "ASUS A7V ACPI BIOS Revision 1007"),
1376                      },
1377          },
1378         {
1379                 /*
1380                  * Latest BIOS for IBM 600E (1.16) has bad pcinum
1381                  * for LPC bridge, which is needed for the PCI
1382                  * interrupt links to work. DSDT fix is in bug 5966.
1383                  * 2645, 2646 model numbers are shared with 600/600E/600X
1384                  */
1385          .callback = disable_acpi_irq,
1386          .ident = "IBM Thinkpad 600 Series 2645",
1387          .matches = {
1388                      DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1389                      DMI_MATCH(DMI_BOARD_NAME, "2645"),
1390                      },
1391          },
1392         {
1393          .callback = disable_acpi_irq,
1394          .ident = "IBM Thinkpad 600 Series 2646",
1395          .matches = {
1396                      DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1397                      DMI_MATCH(DMI_BOARD_NAME, "2646"),
1398                      },
1399          },
1400         /*
1401          * Boxes that need ACPI PCI IRQ routing and PCI scan disabled
1402          */
1403         {                       /* _BBN 0 bug */
1404          .callback = disable_acpi_pci,
1405          .ident = "ASUS PR-DLS",
1406          .matches = {
1407                      DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1408                      DMI_MATCH(DMI_BOARD_NAME, "PR-DLS"),
1409                      DMI_MATCH(DMI_BIOS_VERSION,
1410                                "ASUS PR-DLS ACPI BIOS Revision 1010"),
1411                      DMI_MATCH(DMI_BIOS_DATE, "03/21/2003")
1412                      },
1413          },
1414         {
1415          .callback = disable_acpi_pci,
1416          .ident = "Acer TravelMate 36x Laptop",
1417          .matches = {
1418                      DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
1419                      DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"),
1420                      },
1421          },
1422         {}
1423 };
1424
1425 /* second table for DMI checks that should run after early-quirks */
1426 static struct dmi_system_id __initdata acpi_dmi_table_late[] = {
1427         /*
1428          * HP laptops which use a DSDT reporting as HP/SB400/10000,
1429          * which includes some code which overrides all temperature
1430          * trip points to 16C if the INTIN2 input of the I/O APIC
1431          * is enabled.  This input is incorrectly designated the
1432          * ISA IRQ 0 via an interrupt source override even though
1433          * it is wired to the output of the master 8259A and INTIN0
1434          * is not connected at all.  Force ignoring BIOS IRQ0 pin2
1435          * override in that cases.
1436          */
1437         {
1438          .callback = dmi_ignore_irq0_timer_override,
1439          .ident = "HP nx6115 laptop",
1440          .matches = {
1441                      DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1442                      DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6115"),
1443                      },
1444          },
1445         {
1446          .callback = dmi_ignore_irq0_timer_override,
1447          .ident = "HP NX6125 laptop",
1448          .matches = {
1449                      DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1450                      DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6125"),
1451                      },
1452          },
1453         {
1454          .callback = dmi_ignore_irq0_timer_override,
1455          .ident = "HP NX6325 laptop",
1456          .matches = {
1457                      DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1458                      DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6325"),
1459                      },
1460          },
1461         {
1462          .callback = dmi_ignore_irq0_timer_override,
1463          .ident = "HP 6715b laptop",
1464          .matches = {
1465                      DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1466                      DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq 6715b"),
1467                      },
1468          },
1469         {}
1470 };
1471
1472 /*
1473  * acpi_boot_table_init() and acpi_boot_init()
1474  *  called from setup_arch(), always.
1475  *      1. checksums all tables
1476  *      2. enumerates lapics
1477  *      3. enumerates io-apics
1478  *
1479  * acpi_table_init() is separate to allow reading SRAT without
1480  * other side effects.
1481  *
1482  * side effects of acpi_boot_init:
1483  *      acpi_lapic = 1 if LAPIC found
1484  *      acpi_ioapic = 1 if IOAPIC found
1485  *      if (acpi_lapic && acpi_ioapic) smp_found_config = 1;
1486  *      if acpi_blacklisted() acpi_disabled = 1;
1487  *      acpi_irq_model=...
1488  *      ...
1489  */
1490
1491 void __init acpi_boot_table_init(void)
1492 {
1493         dmi_check_system(acpi_dmi_table);
1494
1495         /*
1496          * If acpi_disabled, bail out
1497          */
1498         if (acpi_disabled)
1499                 return;
1500
1501         /*
1502          * Initialize the ACPI boot-time table parser.
1503          */
1504         if (acpi_table_init()) {
1505                 disable_acpi();
1506                 return;
1507         }
1508
1509         acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1510
1511         /*
1512          * blacklist may disable ACPI entirely
1513          */
1514         if (acpi_blacklisted()) {
1515                 if (acpi_force) {
1516                         printk(KERN_WARNING PREFIX "acpi=force override\n");
1517                 } else {
1518                         printk(KERN_WARNING PREFIX "Disabling ACPI support\n");
1519                         disable_acpi();
1520                         return;
1521                 }
1522         }
1523 }
1524
1525 int __init early_acpi_boot_init(void)
1526 {
1527         /*
1528          * If acpi_disabled, bail out
1529          */
1530         if (acpi_disabled)
1531                 return 1;
1532
1533         /*
1534          * Process the Multiple APIC Description Table (MADT), if present
1535          */
1536         early_acpi_process_madt();
1537
1538         return 0;
1539 }
1540
1541 int __init acpi_boot_init(void)
1542 {
1543         /* those are executed after early-quirks are executed */
1544         dmi_check_system(acpi_dmi_table_late);
1545
1546         /*
1547          * If acpi_disabled, bail out
1548          */
1549         if (acpi_disabled)
1550                 return 1;
1551
1552         acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1553
1554         /*
1555          * set sci_int and PM timer address
1556          */
1557         acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt);
1558
1559         /*
1560          * Process the Multiple APIC Description Table (MADT), if present
1561          */
1562         acpi_process_madt();
1563
1564         acpi_table_parse(ACPI_SIG_HPET, acpi_parse_hpet);
1565
1566         if (!acpi_noirq)
1567                 x86_init.pci.init = pci_acpi_init;
1568
1569         return 0;
1570 }
1571
1572 static int __init parse_acpi(char *arg)
1573 {
1574         if (!arg)
1575                 return -EINVAL;
1576
1577         /* "acpi=off" disables both ACPI table parsing and interpreter */
1578         if (strcmp(arg, "off") == 0) {
1579                 disable_acpi();
1580         }
1581         /* acpi=force to over-ride black-list */
1582         else if (strcmp(arg, "force") == 0) {
1583                 acpi_force = 1;
1584                 acpi_disabled = 0;
1585         }
1586         /* acpi=strict disables out-of-spec workarounds */
1587         else if (strcmp(arg, "strict") == 0) {
1588                 acpi_strict = 1;
1589         }
1590         /* acpi=rsdt use RSDT instead of XSDT */
1591         else if (strcmp(arg, "rsdt") == 0) {
1592                 acpi_rsdt_forced = 1;
1593         }
1594         /* "acpi=noirq" disables ACPI interrupt routing */
1595         else if (strcmp(arg, "noirq") == 0) {
1596                 acpi_noirq_set();
1597         }
1598         /* "acpi=copy_dsdt" copys DSDT */
1599         else if (strcmp(arg, "copy_dsdt") == 0) {
1600                 acpi_gbl_copy_dsdt_locally = 1;
1601         } else {
1602                 /* Core will printk when we return error. */
1603                 return -EINVAL;
1604         }
1605         return 0;
1606 }
1607 early_param("acpi", parse_acpi);
1608
1609 /* FIXME: Using pci= for an ACPI parameter is a travesty. */
1610 static int __init parse_pci(char *arg)
1611 {
1612         if (arg && strcmp(arg, "noacpi") == 0)
1613                 acpi_disable_pci();
1614         return 0;
1615 }
1616 early_param("pci", parse_pci);
1617
1618 int __init acpi_mps_check(void)
1619 {
1620 #if defined(CONFIG_X86_LOCAL_APIC) && !defined(CONFIG_X86_MPPARSE)
1621 /* mptable code is not built-in*/
1622         if (acpi_disabled || acpi_noirq) {
1623                 printk(KERN_WARNING "MPS support code is not built-in.\n"
1624                        "Using acpi=off or acpi=noirq or pci=noacpi "
1625                        "may have problem\n");
1626                 return 1;
1627         }
1628 #endif
1629         return 0;
1630 }
1631
1632 #ifdef CONFIG_X86_IO_APIC
1633 static int __init parse_acpi_skip_timer_override(char *arg)
1634 {
1635         acpi_skip_timer_override = 1;
1636         return 0;
1637 }
1638 early_param("acpi_skip_timer_override", parse_acpi_skip_timer_override);
1639
1640 static int __init parse_acpi_use_timer_override(char *arg)
1641 {
1642         acpi_use_timer_override = 1;
1643         return 0;
1644 }
1645 early_param("acpi_use_timer_override", parse_acpi_use_timer_override);
1646 #endif /* CONFIG_X86_IO_APIC */
1647
1648 static int __init setup_acpi_sci(char *s)
1649 {
1650         if (!s)
1651                 return -EINVAL;
1652         if (!strcmp(s, "edge"))
1653                 acpi_sci_flags =  ACPI_MADT_TRIGGER_EDGE |
1654                         (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1655         else if (!strcmp(s, "level"))
1656                 acpi_sci_flags = ACPI_MADT_TRIGGER_LEVEL |
1657                         (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1658         else if (!strcmp(s, "high"))
1659                 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_HIGH |
1660                         (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1661         else if (!strcmp(s, "low"))
1662                 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_LOW |
1663                         (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1664         else
1665                 return -EINVAL;
1666         return 0;
1667 }
1668 early_param("acpi_sci", setup_acpi_sci);
1669
1670 int __acpi_acquire_global_lock(unsigned int *lock)
1671 {
1672         unsigned int old, new, val;
1673         do {
1674                 old = *lock;
1675                 new = (((old & ~0x3) + 2) + ((old >> 1) & 0x1));
1676                 val = cmpxchg(lock, old, new);
1677         } while (unlikely (val != old));
1678         return (new < 3) ? -1 : 0;
1679 }
1680
1681 int __acpi_release_global_lock(unsigned int *lock)
1682 {
1683         unsigned int old, new, val;
1684         do {
1685                 old = *lock;
1686                 new = old & ~0x3;
1687                 val = cmpxchg(lock, old, new);
1688         } while (unlikely (val != old));
1689         return old & 0x1;
1690 }