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 (!enabled) {
 203                 ++disabled_cpus;
 204                 return;
 205         }
 206
 207         if (boot_cpu_physical_apicid != -1U)
 208                 ver = apic_version[boot_cpu_physical_apicid];
 209
 210         generic_processor_info(id, ver);
 211 }
 212
 213 static int __init
 214 acpi_parse_x2apic(struct acpi_subtable_header *header, const unsigned long end)
 215 {
 216         struct acpi_madt_local_x2apic *processor = NULL;
 217
 218         processor = (struct acpi_madt_local_x2apic *)header;
 219
 220         if (BAD_MADT_ENTRY(processor, end))
 221                 return -EINVAL;
 222
 223         acpi_table_print_madt_entry(header);
 224
 225 #ifdef CONFIG_X86_X2APIC
 226         /*
 227          * We need to register disabled CPU as well to permit
 228          * counting disabled CPUs. This allows us to size
 229          * cpus_possible_map more accurately, to permit
 230          * to not preallocating memory for all NR_CPUS
 231          * when we use CPU hotplug.
 232          */
 233         acpi_register_lapic(processor->local_apic_id,   /* APIC ID */
 234                             processor->lapic_flags & ACPI_MADT_ENABLED);
 235 #else
 236         printk(KERN_WARNING PREFIX "x2apic entry ignored\n");
 237 #endif
 238
 239         return 0;
 240 }
 241
 242 static int __init
 243 acpi_parse_lapic(struct acpi_subtable_header * header, const unsigned long end)
 244 {
 245         struct acpi_madt_local_apic *processor = NULL;
 246
 247         processor = (struct acpi_madt_local_apic *)header;
 248
 249         if (BAD_MADT_ENTRY(processor, end))
 250                 return -EINVAL;
 251
 252         acpi_table_print_madt_entry(header);
 253
 254         /*
 255          * We need to register disabled CPU as well to permit
 256          * counting disabled CPUs. This allows us to size
 257          * cpus_possible_map more accurately, to permit
 258          * to not preallocating memory for all NR_CPUS
 259          * when we use CPU hotplug.
 260          */
 261         acpi_register_lapic(processor->id,      /* APIC ID */
 262                             processor->lapic_flags & ACPI_MADT_ENABLED);
 263
 264         return 0;
 265 }
 266
 267 static int __init
 268 acpi_parse_sapic(struct acpi_subtable_header *header, const unsigned long end)
 269 {
 270         struct acpi_madt_local_sapic *processor = NULL;
 271
 272         processor = (struct acpi_madt_local_sapic *)header;
 273
 274         if (BAD_MADT_ENTRY(processor, end))
 275                 return -EINVAL;
 276
 277         acpi_table_print_madt_entry(header);
 278
 279         acpi_register_lapic((processor->id << 8) | processor->eid,/* APIC ID */
 280                             processor->lapic_flags & ACPI_MADT_ENABLED);
 281
 282         return 0;
 283 }
 284
 285 static int __init
 286 acpi_parse_lapic_addr_ovr(struct acpi_subtable_header * header,
 287                           const unsigned long end)
 288 {
 289         struct acpi_madt_local_apic_override *lapic_addr_ovr = NULL;
 290
 291         lapic_addr_ovr = (struct acpi_madt_local_apic_override *)header;
 292
 293         if (BAD_MADT_ENTRY(lapic_addr_ovr, end))
 294                 return -EINVAL;
 295
 296         acpi_lapic_addr = lapic_addr_ovr->address;
 297
 298         return 0;
 299 }
 300
 301 static int __init
 302 acpi_parse_x2apic_nmi(struct acpi_subtable_header *header,
 303                       const unsigned long end)
 304 {
 305         struct acpi_madt_local_x2apic_nmi *x2apic_nmi = NULL;
 306
 307         x2apic_nmi = (struct acpi_madt_local_x2apic_nmi *)header;
 308
 309         if (BAD_MADT_ENTRY(x2apic_nmi, end))
 310                 return -EINVAL;
 311
 312         acpi_table_print_madt_entry(header);
 313
 314         if (x2apic_nmi->lint != 1)
 315                 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n");
 316
 317         return 0;
 318 }
 319
 320 static int __init
 321 acpi_parse_lapic_nmi(struct acpi_subtable_header * header, const unsigned long end)
 322 {
 323         struct acpi_madt_local_apic_nmi *lapic_nmi = NULL;
 324
 325         lapic_nmi = (struct acpi_madt_local_apic_nmi *)header;
 326
 327         if (BAD_MADT_ENTRY(lapic_nmi, end))
 328                 return -EINVAL;
 329
 330         acpi_table_print_madt_entry(header);
 331
 332         if (lapic_nmi->lint != 1)
 333                 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n");
 334
 335         return 0;
 336 }
 337
 338 #endif                          /*CONFIG_X86_LOCAL_APIC */
 339
 340 #ifdef CONFIG_X86_IO_APIC
 341
 342 static int __init
 343 acpi_parse_ioapic(struct acpi_subtable_header * header, const unsigned long end)
 344 {
 345         struct acpi_madt_io_apic *ioapic = NULL;
 346
 347         ioapic = (struct acpi_madt_io_apic *)header;
 348
 349         if (BAD_MADT_ENTRY(ioapic, end))
 350                 return -EINVAL;
 351
 352         acpi_table_print_madt_entry(header);
 353
 354         mp_register_ioapic(ioapic->id,
 355                            ioapic->address, ioapic->global_irq_base);
 356
 357         return 0;
 358 }
 359
 360 /*
 361  * Parse Interrupt Source Override for the ACPI SCI
 362  */
 363 static void __init acpi_sci_ioapic_setup(u8 bus_irq, u16 polarity, u16 trigger, u32 gsi)
 364 {
 365         if (trigger == 0)       /* compatible SCI trigger is level */
 366                 trigger = 3;
 367
 368         if (polarity == 0)      /* compatible SCI polarity is low */
 369                 polarity = 3;
 370
 371         /* Command-line over-ride via acpi_sci= */
 372         if (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK)
 373                 trigger = (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2;
 374
 375         if (acpi_sci_flags & ACPI_MADT_POLARITY_MASK)
 376                 polarity = acpi_sci_flags & ACPI_MADT_POLARITY_MASK;
 377
 378         /*
 379          * mp_config_acpi_legacy_irqs() already setup IRQs < 16
 380          * If GSI is < 16, this will update its flags,
 381          * else it will create a new mp_irqs[] entry.
 382          */
 383         mp_override_legacy_irq(bus_irq, polarity, trigger, gsi);
 384
 385         /*
 386          * stash over-ride to indicate we've been here
 387          * and for later update of acpi_gbl_FADT
 388          */
 389         acpi_sci_override_gsi = gsi;
 390         return;
 391 }
 392
 393 static int __init
 394 acpi_parse_int_src_ovr(struct acpi_subtable_header * header,
 395                        const unsigned long end)
 396 {
 397         struct acpi_madt_interrupt_override *intsrc = NULL;
 398
 399         intsrc = (struct acpi_madt_interrupt_override *)header;
 400
 401         if (BAD_MADT_ENTRY(intsrc, end))
 402                 return -EINVAL;
 403
 404         acpi_table_print_madt_entry(header);
 405
 406         if (intsrc->source_irq == acpi_gbl_FADT.sci_interrupt) {
 407                 acpi_sci_ioapic_setup(intsrc->source_irq,
 408                                       intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
 409                                       (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2,
 410                                       intsrc->global_irq);
 411                 return 0;
 412         }
 413
 414         if (intsrc->source_irq == 0 && intsrc->global_irq == 2) {
 415                 if (acpi_skip_timer_override) {
 416                         printk(PREFIX "BIOS IRQ0 pin2 override ignored.\n");
 417                         return 0;
 418                 }
 419                 if (acpi_fix_pin2_polarity && (intsrc->inti_flags & ACPI_MADT_POLARITY_MASK)) {
 420                         intsrc->inti_flags &= ~ACPI_MADT_POLARITY_MASK;
 421                         printk(PREFIX "BIOS IRQ0 pin2 override: forcing polarity to high active.\n");
 422                 }
 423         }
 424
 425         mp_override_legacy_irq(intsrc->source_irq,
 426                                 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
 427                                 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2,
 428                                 intsrc->global_irq);
 429
 430         return 0;
 431 }
 432
 433 static int __init
 434 acpi_parse_nmi_src(struct acpi_subtable_header * header, const unsigned long end)
 435 {
 436         struct acpi_madt_nmi_source *nmi_src = NULL;
 437
 438         nmi_src = (struct acpi_madt_nmi_source *)header;
 439
 440         if (BAD_MADT_ENTRY(nmi_src, end))
 441                 return -EINVAL;
 442
 443         acpi_table_print_madt_entry(header);
 444
 445         /* TBD: Support nimsrc entries? */
 446
 447         return 0;
 448 }
 449
 450 #endif                          /* CONFIG_X86_IO_APIC */
 451
 452 /*
 453  * acpi_pic_sci_set_trigger()
 454  *
 455  * use ELCR to set PIC-mode trigger type for SCI
 456  *
 457  * If a PIC-mode SCI is not recognized or gives spurious IRQ7's
 458  * it may require Edge Trigger -- use "acpi_sci=edge"
 459  *
 460  * Port 0x4d0-4d1 are ECLR1 and ECLR2, the Edge/Level Control Registers
 461  * for the 8259 PIC.  bit[n] = 1 means irq[n] is Level, otherwise Edge.
 462  * ECLR1 is IRQs 0-7 (IRQ 0, 1, 2 must be 0)
 463  * ECLR2 is IRQs 8-15 (IRQ 8, 13 must be 0)
 464  */
 465
 466 void __init acpi_pic_sci_set_trigger(unsigned int irq, u16 trigger)
 467 {
 468         unsigned int mask = 1 << irq;
 469         unsigned int old, new;
 470
 471         /* Real old ELCR mask */
 472         old = inb(0x4d0) | (inb(0x4d1) << 8);
 473
 474         /*
 475          * If we use ACPI to set PCI IRQs, then we should clear ELCR
 476          * since we will set it correctly as we enable the PCI irq
 477          * routing.
 478          */
 479         new = acpi_noirq ? old : 0;
 480
 481         /*
 482          * Update SCI information in the ELCR, it isn't in the PCI
 483          * routing tables..
 484          */
 485         switch (trigger) {
 486         case 1:         /* Edge - clear */
 487                 new &= ~mask;
 488                 break;
 489         case 3:         /* Level - set */
 490                 new |= mask;
 491                 break;
 492         }
 493
 494         if (old == new)
 495                 return;
 496
 497         printk(PREFIX "setting ELCR to %04x (from %04x)\n", new, old);
 498         outb(new, 0x4d0);
 499         outb(new >> 8, 0x4d1);
 500 }
 501
 502 int acpi_gsi_to_irq(u32 gsi, unsigned int *irq)
 503 {
 504         *irq = gsi_to_irq(gsi);
 505
 506 #ifdef CONFIG_X86_IO_APIC
 507         if (acpi_irq_model == ACPI_IRQ_MODEL_IOAPIC)
 508                 setup_IO_APIC_irq_extra(gsi);
 509 #endif
 510
 511         return 0;
 512 }
 513
 514 int acpi_isa_irq_to_gsi(unsigned isa_irq, u32 *gsi)
 515 {
 516         if (isa_irq >= 16)
 517                 return -1;
 518         *gsi = irq_to_gsi(isa_irq);
 519         return 0;
 520 }
 521
 522 static int acpi_register_gsi_pic(struct device *dev, u32 gsi,
 523                                  int trigger, int polarity)
 524 {
 525 #ifdef CONFIG_PCI
 526         /*
 527          * Make sure all (legacy) PCI IRQs are set as level-triggered.
 528          */
 529         if (trigger == ACPI_LEVEL_SENSITIVE)
 530                 eisa_set_level_irq(gsi);
 531 #endif
 532
 533         return gsi;
 534 }
 535
 536 static int acpi_register_gsi_ioapic(struct device *dev, u32 gsi,
 537                                     int trigger, int polarity)
 538 {
 539 #ifdef CONFIG_X86_IO_APIC
 540         gsi = mp_register_gsi(dev, gsi, trigger, polarity);
 541 #endif
 542
 543         return gsi;
 544 }
 545
 546 int (*__acpi_register_gsi)(struct device *dev, u32 gsi,
 547                            int trigger, int polarity) = acpi_register_gsi_pic;
 548
 549 /*
 550  * success: return IRQ number (>=0)
 551  * failure: return < 0
 552  */
 553 int acpi_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity)
 554 {
 555         unsigned int irq;
 556         unsigned int plat_gsi = gsi;
 557
 558         plat_gsi = (*__acpi_register_gsi)(dev, gsi, trigger, polarity);
 559         irq = gsi_to_irq(plat_gsi);
 560
 561         return irq;
 562 }
 563
 564 void __init acpi_set_irq_model_pic(void)
 565 {
 566         acpi_irq_model = ACPI_IRQ_MODEL_PIC;
 567         __acpi_register_gsi = acpi_register_gsi_pic;
 568         acpi_ioapic = 0;
 569 }
 570
 571 void __init acpi_set_irq_model_ioapic(void)
 572 {
 573         acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC;
 574         __acpi_register_gsi = acpi_register_gsi_ioapic;
 575         acpi_ioapic = 1;
 576 }
 577
 578 /*
 579  *  ACPI based hotplug support for CPU
 580  */
 581 #ifdef CONFIG_ACPI_HOTPLUG_CPU
 582 #include <acpi/processor.h>
 583
 584 static void acpi_map_cpu2node(acpi_handle handle, int cpu, int physid)
 585 {
 586 #ifdef CONFIG_ACPI_NUMA
 587         int nid;
 588
 589         nid = acpi_get_node(handle);
 590         if (nid == -1 || !node_online(nid))
 591                 return;
 592 #ifdef CONFIG_X86_64
 593         apicid_to_node[physid] = nid;
 594         numa_set_node(cpu, nid);
 595 #else /* CONFIG_X86_32 */
 596         apicid_2_node[physid] = nid;
 597         cpu_to_node_map[cpu] = nid;
 598 #endif
 599
 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 void __init acpi_register_lapic_address(unsigned long address)
 857 {
 858         mp_lapic_addr = address;
 859
 860         set_fixmap_nocache(FIX_APIC_BASE, address);
 861         if (boot_cpu_physical_apicid == -1U) {
 862                 boot_cpu_physical_apicid  = read_apic_id();
 863                 apic_version[boot_cpu_physical_apicid] =
 864                          GET_APIC_VERSION(apic_read(APIC_LVR));
 865         }
 866 }
 867
 868 static int __init early_acpi_parse_madt_lapic_addr_ovr(void)
 869 {
 870         int count;
 871
 872         if (!cpu_has_apic)
 873                 return -ENODEV;
 874
 875         /*
 876          * Note that the LAPIC address is obtained from the MADT (32-bit value)
 877          * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value).
 878          */
 879
 880         count =
 881             acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
 882                                   acpi_parse_lapic_addr_ovr, 0);
 883         if (count < 0) {
 884                 printk(KERN_ERR PREFIX
 885                        "Error parsing LAPIC address override entry\n");
 886                 return count;
 887         }
 888
 889         acpi_register_lapic_address(acpi_lapic_addr);
 890
 891         return count;
 892 }
 893
 894 static int __init acpi_parse_madt_lapic_entries(void)
 895 {
 896         int count;
 897         int x2count = 0;
 898
 899         if (!cpu_has_apic)
 900                 return -ENODEV;
 901
 902         /*
 903          * Note that the LAPIC address is obtained from the MADT (32-bit value)
 904          * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value).
 905          */
 906
 907         count =
 908             acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
 909                                   acpi_parse_lapic_addr_ovr, 0);
 910         if (count < 0) {
 911                 printk(KERN_ERR PREFIX
 912                        "Error parsing LAPIC address override entry\n");
 913                 return count;
 914         }
 915
 916         acpi_register_lapic_address(acpi_lapic_addr);
 917
 918         count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC,
 919                                       acpi_parse_sapic, MAX_APICS);
 920
 921         if (!count) {
 922                 x2count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC,
 923                                                 acpi_parse_x2apic, MAX_APICS);
 924                 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC,
 925                                               acpi_parse_lapic, MAX_APICS);
 926         }
 927         if (!count && !x2count) {
 928                 printk(KERN_ERR PREFIX "No LAPIC entries present\n");
 929                 /* TBD: Cleanup to allow fallback to MPS */
 930                 return -ENODEV;
 931         } else if (count < 0 || x2count < 0) {
 932                 printk(KERN_ERR PREFIX "Error parsing LAPIC entry\n");
 933                 /* TBD: Cleanup to allow fallback to MPS */
 934                 return count;
 935         }
 936
 937         x2count =
 938             acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC_NMI,
 939                                   acpi_parse_x2apic_nmi, 0);
 940         count =
 941             acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI, acpi_parse_lapic_nmi, 0);
 942         if (count < 0 || x2count < 0) {
 943                 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n");
 944                 /* TBD: Cleanup to allow fallback to MPS */
 945                 return count;
 946         }
 947         return 0;
 948 }
 949 #endif                          /* CONFIG_X86_LOCAL_APIC */
 950
 951 #ifdef  CONFIG_X86_IO_APIC
 952 #define MP_ISA_BUS              0
 953
 954 #ifdef CONFIG_X86_ES7000
 955 extern int es7000_plat;
 956 #endif
 957
 958 static void assign_to_mp_irq(struct mpc_intsrc *m,
 959                                     struct mpc_intsrc *mp_irq)
 960 {
 961         memcpy(mp_irq, m, sizeof(struct mpc_intsrc));
 962 }
 963
 964 static int mp_irq_cmp(struct mpc_intsrc *mp_irq,
 965                                 struct mpc_intsrc *m)
 966 {
 967         return memcmp(mp_irq, m, sizeof(struct mpc_intsrc));
 968 }
 969
 970 static void save_mp_irq(struct mpc_intsrc *m)
 971 {
 972         int i;
 973
 974         for (i = 0; i < mp_irq_entries; i++) {
 975                 if (!mp_irq_cmp(&mp_irqs[i], m))
 976                         return;
 977         }
 978
 979         assign_to_mp_irq(m, &mp_irqs[mp_irq_entries]);
 980         if (++mp_irq_entries == MAX_IRQ_SOURCES)
 981                 panic("Max # of irq sources exceeded!!\n");
 982 }
 983
 984 void __init mp_override_legacy_irq(u8 bus_irq, u8 polarity, u8 trigger, u32 gsi)
 985 {
 986         int ioapic;
 987         int pin;
 988         struct mpc_intsrc mp_irq;
 989
 990         /*
 991          * Convert 'gsi' to 'ioapic.pin'.
 992          */
 993         ioapic = mp_find_ioapic(gsi);
 994         if (ioapic < 0)
 995                 return;
 996         pin = mp_find_ioapic_pin(ioapic, gsi);
 997
 998         /*
 999          * TBD: This check is for faulty timer entries, where the override
1000          *      erroneously sets the trigger to level, resulting in a HUGE
1001          *      increase of timer interrupts!
1002          */
1003         if ((bus_irq == 0) && (trigger == 3))
1004                 trigger = 1;
1005
1006         mp_irq.type = MP_INTSRC;
1007         mp_irq.irqtype = mp_INT;
1008         mp_irq.irqflag = (trigger << 2) | polarity;
1009         mp_irq.srcbus = MP_ISA_BUS;
1010         mp_irq.srcbusirq = bus_irq;     /* IRQ */
1011         mp_irq.dstapic = mp_ioapics[ioapic].apicid; /* APIC ID */
1012         mp_irq.dstirq = pin;    /* INTIN# */
1013
1014         save_mp_irq(&mp_irq);
1015
1016         isa_irq_to_gsi[bus_irq] = gsi;
1017 }
1018
1019 void __init mp_config_acpi_legacy_irqs(void)
1020 {
1021         int i;
1022         struct mpc_intsrc mp_irq;
1023
1024 #if defined (CONFIG_MCA) || defined (CONFIG_EISA)
1025         /*
1026          * Fabricate the legacy ISA bus (bus #31).
1027          */
1028         mp_bus_id_to_type[MP_ISA_BUS] = MP_BUS_ISA;
1029 #endif
1030         set_bit(MP_ISA_BUS, mp_bus_not_pci);
1031         pr_debug("Bus #%d is ISA\n", MP_ISA_BUS);
1032
1033 #ifdef CONFIG_X86_ES7000
1034         /*
1035          * Older generations of ES7000 have no legacy identity mappings
1036          */
1037         if (es7000_plat == 1)
1038                 return;
1039 #endif
1040
1041         /*
1042          * Use the default configuration for the IRQs 0-15.  Unless
1043          * overridden by (MADT) interrupt source override entries.
1044          */
1045         for (i = 0; i < 16; i++) {
1046                 int ioapic, pin;
1047                 unsigned int dstapic;
1048                 int idx;
1049                 u32 gsi;
1050
1051                 /* Locate the gsi that irq i maps to. */
1052                 if (acpi_isa_irq_to_gsi(i, &gsi))
1053                         continue;
1054
1055                 /*
1056                  * Locate the IOAPIC that manages the ISA IRQ.
1057                  */
1058                 ioapic = mp_find_ioapic(gsi);
1059                 if (ioapic < 0)
1060                         continue;
1061                 pin = mp_find_ioapic_pin(ioapic, gsi);
1062                 dstapic = mp_ioapics[ioapic].apicid;
1063
1064                 for (idx = 0; idx < mp_irq_entries; idx++) {
1065                         struct mpc_intsrc *irq = mp_irqs + idx;
1066
1067                         /* Do we already have a mapping for this ISA IRQ? */
1068                         if (irq->srcbus == MP_ISA_BUS && irq->srcbusirq == i)
1069                                 break;
1070
1071                         /* Do we already have a mapping for this IOAPIC pin */
1072                         if (irq->dstapic == dstapic && irq->dstirq == pin)
1073                                 break;
1074                 }
1075
1076                 if (idx != mp_irq_entries) {
1077                         printk(KERN_DEBUG "ACPI: IRQ%d used by override.\n", i);
1078                         continue;       /* IRQ already used */
1079                 }
1080
1081                 mp_irq.type = MP_INTSRC;
1082                 mp_irq.irqflag = 0;     /* Conforming */
1083                 mp_irq.srcbus = MP_ISA_BUS;
1084                 mp_irq.dstapic = dstapic;
1085                 mp_irq.irqtype = mp_INT;
1086                 mp_irq.srcbusirq = i; /* Identity mapped */
1087                 mp_irq.dstirq = pin;
1088
1089                 save_mp_irq(&mp_irq);
1090         }
1091 }
1092
1093 static int mp_config_acpi_gsi(struct device *dev, u32 gsi, int trigger,
1094                         int polarity)
1095 {
1096 #ifdef CONFIG_X86_MPPARSE
1097         struct mpc_intsrc mp_irq;
1098         struct pci_dev *pdev;
1099         unsigned char number;
1100         unsigned int devfn;
1101         int ioapic;
1102         u8 pin;
1103
1104         if (!acpi_ioapic)
1105                 return 0;
1106         if (!dev)
1107                 return 0;
1108         if (dev->bus != &pci_bus_type)
1109                 return 0;
1110
1111         pdev = to_pci_dev(dev);
1112         number = pdev->bus->number;
1113         devfn = pdev->devfn;
1114         pin = pdev->pin;
1115         /* print the entry should happen on mptable identically */
1116         mp_irq.type = MP_INTSRC;
1117         mp_irq.irqtype = mp_INT;
1118         mp_irq.irqflag = (trigger == ACPI_EDGE_SENSITIVE ? 4 : 0x0c) |
1119                                 (polarity == ACPI_ACTIVE_HIGH ? 1 : 3);
1120         mp_irq.srcbus = number;
1121         mp_irq.srcbusirq = (((devfn >> 3) & 0x1f) << 2) | ((pin - 1) & 3);
1122         ioapic = mp_find_ioapic(gsi);
1123         mp_irq.dstapic = mp_ioapics[ioapic].apicid;
1124         mp_irq.dstirq = mp_find_ioapic_pin(ioapic, gsi);
1125
1126         save_mp_irq(&mp_irq);
1127 #endif
1128         return 0;
1129 }
1130
1131 int mp_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity)
1132 {
1133         int ioapic;
1134         int ioapic_pin;
1135         struct io_apic_irq_attr irq_attr;
1136
1137         if (acpi_irq_model != ACPI_IRQ_MODEL_IOAPIC)
1138                 return gsi;
1139
1140         /* Don't set up the ACPI SCI because it's already set up */
1141         if (acpi_gbl_FADT.sci_interrupt == gsi)
1142                 return gsi;
1143
1144         ioapic = mp_find_ioapic(gsi);
1145         if (ioapic < 0) {
1146                 printk(KERN_WARNING "No IOAPIC for GSI %u\n", gsi);
1147                 return gsi;
1148         }
1149
1150         ioapic_pin = mp_find_ioapic_pin(ioapic, gsi);
1151
1152         if (ioapic_pin > MP_MAX_IOAPIC_PIN) {
1153                 printk(KERN_ERR "Invalid reference to IOAPIC pin "
1154                        "%d-%d\n", mp_ioapics[ioapic].apicid,
1155                        ioapic_pin);
1156                 return gsi;
1157         }
1158
1159         if (enable_update_mptable)
1160                 mp_config_acpi_gsi(dev, gsi, trigger, polarity);
1161
1162         set_io_apic_irq_attr(&irq_attr, ioapic, ioapic_pin,
1163                              trigger == ACPI_EDGE_SENSITIVE ? 0 : 1,
1164                              polarity == ACPI_ACTIVE_HIGH ? 0 : 1);
1165         io_apic_set_pci_routing(dev, gsi_to_irq(gsi), &irq_attr);
1166
1167         return gsi;
1168 }
1169
1170 /*
1171  * Parse IOAPIC related entries in MADT
1172  * returns 0 on success, < 0 on error
1173  */
1174 static int __init acpi_parse_madt_ioapic_entries(void)
1175 {
1176         int count;
1177
1178         /*
1179          * ACPI interpreter is required to complete interrupt setup,
1180          * so if it is off, don't enumerate the io-apics with ACPI.
1181          * If MPS is present, it will handle them,
1182          * otherwise the system will stay in PIC mode
1183          */
1184         if (acpi_disabled || acpi_noirq)
1185                 return -ENODEV;
1186
1187         if (!cpu_has_apic)
1188                 return -ENODEV;
1189
1190         /*
1191          * if "noapic" boot option, don't look for IO-APICs
1192          */
1193         if (skip_ioapic_setup) {
1194                 printk(KERN_INFO PREFIX "Skipping IOAPIC probe "
1195                        "due to 'noapic' option.\n");
1196                 return -ENODEV;
1197         }
1198
1199         count =
1200             acpi_table_parse_madt(ACPI_MADT_TYPE_IO_APIC, acpi_parse_ioapic,
1201                                   MAX_IO_APICS);
1202         if (!count) {
1203                 printk(KERN_ERR PREFIX "No IOAPIC entries present\n");
1204                 return -ENODEV;
1205         } else if (count < 0) {
1206                 printk(KERN_ERR PREFIX "Error parsing IOAPIC entry\n");
1207                 return count;
1208         }
1209
1210         count =
1211             acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE, acpi_parse_int_src_ovr,
1212                                   nr_irqs);
1213         if (count < 0) {
1214                 printk(KERN_ERR PREFIX
1215                        "Error parsing interrupt source overrides entry\n");
1216                 /* TBD: Cleanup to allow fallback to MPS */
1217                 return count;
1218         }
1219
1220         /*
1221          * If BIOS did not supply an INT_SRC_OVR for the SCI
1222          * pretend we got one so we can set the SCI flags.
1223          */
1224         if (!acpi_sci_override_gsi)
1225                 acpi_sci_ioapic_setup(acpi_gbl_FADT.sci_interrupt, 0, 0,
1226                                       acpi_gbl_FADT.sci_interrupt);
1227
1228         /* Fill in identity legacy mappings where no override */
1229         mp_config_acpi_legacy_irqs();
1230
1231         count =
1232             acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE, acpi_parse_nmi_src,
1233                                   nr_irqs);
1234         if (count < 0) {
1235                 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n");
1236                 /* TBD: Cleanup to allow fallback to MPS */
1237                 return count;
1238         }
1239
1240         return 0;
1241 }
1242 #else
1243 static inline int acpi_parse_madt_ioapic_entries(void)
1244 {
1245         return -1;
1246 }
1247 #endif  /* !CONFIG_X86_IO_APIC */
1248
1249 static void __init early_acpi_process_madt(void)
1250 {
1251 #ifdef CONFIG_X86_LOCAL_APIC
1252         int error;
1253
1254         if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1255
1256                 /*
1257                  * Parse MADT LAPIC entries
1258                  */
1259                 error = early_acpi_parse_madt_lapic_addr_ovr();
1260                 if (!error) {
1261                         acpi_lapic = 1;
1262                         smp_found_config = 1;
1263                 }
1264                 if (error == -EINVAL) {
1265                         /*
1266                          * Dell Precision Workstation 410, 610 come here.
1267                          */
1268                         printk(KERN_ERR PREFIX
1269                                "Invalid BIOS MADT, disabling ACPI\n");
1270                         disable_acpi();
1271                 }
1272         }
1273 #endif
1274 }
1275
1276 static void __init acpi_process_madt(void)
1277 {
1278 #ifdef CONFIG_X86_LOCAL_APIC
1279         int error;
1280
1281         if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1282
1283                 /*
1284                  * Parse MADT LAPIC entries
1285                  */
1286                 error = acpi_parse_madt_lapic_entries();
1287                 if (!error) {
1288                         acpi_lapic = 1;
1289
1290                         /*
1291                          * Parse MADT IO-APIC entries
1292                          */
1293                         error = acpi_parse_madt_ioapic_entries();
1294                         if (!error) {
1295                                 acpi_set_irq_model_ioapic();
1296
1297                                 smp_found_config = 1;
1298                         }
1299                 }
1300                 if (error == -EINVAL) {
1301                         /*
1302                          * Dell Precision Workstation 410, 610 come here.
1303                          */
1304                         printk(KERN_ERR PREFIX
1305                                "Invalid BIOS MADT, disabling ACPI\n");
1306                         disable_acpi();
1307                 }
1308         } else {
1309                 /*
1310                  * ACPI found no MADT, and so ACPI wants UP PIC mode.
1311                  * In the event an MPS table was found, forget it.
1312                  * Boot with "acpi=off" to use MPS on such a system.
1313                  */
1314                 if (smp_found_config) {
1315                         printk(KERN_WARNING PREFIX
1316                                 "No APIC-table, disabling MPS\n");
1317                         smp_found_config = 0;
1318                 }
1319         }
1320
1321         /*
1322          * ACPI supports both logical (e.g. Hyper-Threading) and physical
1323          * processors, where MPS only supports physical.
1324          */
1325         if (acpi_lapic && acpi_ioapic)
1326                 printk(KERN_INFO "Using ACPI (MADT) for SMP configuration "
1327                        "information\n");
1328         else if (acpi_lapic)
1329                 printk(KERN_INFO "Using ACPI for processor (LAPIC) "
1330                        "configuration information\n");
1331 #endif
1332         return;
1333 }
1334
1335 static int __init disable_acpi_irq(const struct dmi_system_id *d)
1336 {
1337         if (!acpi_force) {
1338                 printk(KERN_NOTICE "%s detected: force use of acpi=noirq\n",
1339                        d->ident);
1340                 acpi_noirq_set();
1341         }
1342         return 0;
1343 }
1344
1345 static int __init disable_acpi_pci(const struct dmi_system_id *d)
1346 {
1347         if (!acpi_force) {
1348                 printk(KERN_NOTICE "%s detected: force use of pci=noacpi\n",
1349                        d->ident);
1350                 acpi_disable_pci();
1351         }
1352         return 0;
1353 }
1354
1355 static int __init dmi_disable_acpi(const struct dmi_system_id *d)
1356 {
1357         if (!acpi_force) {
1358                 printk(KERN_NOTICE "%s detected: acpi off\n", d->ident);
1359                 disable_acpi();
1360         } else {
1361                 printk(KERN_NOTICE
1362                        "Warning: DMI blacklist says broken, but acpi forced\n");
1363         }
1364         return 0;
1365 }
1366
1367 /*
1368  * Force ignoring BIOS IRQ0 pin2 override
1369  */
1370 static int __init dmi_ignore_irq0_timer_override(const struct dmi_system_id *d)
1371 {
1372         /*
1373          * The ati_ixp4x0_rev() early PCI quirk should have set
1374          * the acpi_skip_timer_override flag already:
1375          */
1376         if (!acpi_skip_timer_override) {
1377                 WARN(1, KERN_ERR "ati_ixp4x0 quirk not complete.\n");
1378                 pr_notice("%s detected: Ignoring BIOS IRQ0 pin2 override\n",
1379                         d->ident);
1380                 acpi_skip_timer_override = 1;
1381         }
1382         return 0;
1383 }
1384
1385 /*
1386  * If your system is blacklisted here, but you find that acpi=force
1387  * works for you, please contact linux-acpi@vger.kernel.org
1388  */
1389 static struct dmi_system_id __initdata acpi_dmi_table[] = {
1390         /*
1391          * Boxes that need ACPI disabled
1392          */
1393         {
1394          .callback = dmi_disable_acpi,
1395          .ident = "IBM Thinkpad",
1396          .matches = {
1397                      DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1398                      DMI_MATCH(DMI_BOARD_NAME, "2629H1G"),
1399                      },
1400          },
1401
1402         /*
1403          * Boxes that need ACPI PCI IRQ routing disabled
1404          */
1405         {
1406          .callback = disable_acpi_irq,
1407          .ident = "ASUS A7V",
1408          .matches = {
1409                      DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC"),
1410                      DMI_MATCH(DMI_BOARD_NAME, "<A7V>"),
1411                      /* newer BIOS, Revision 1011, does work */
1412                      DMI_MATCH(DMI_BIOS_VERSION,
1413                                "ASUS A7V ACPI BIOS Revision 1007"),
1414                      },
1415          },
1416         {
1417                 /*
1418                  * Latest BIOS for IBM 600E (1.16) has bad pcinum
1419                  * for LPC bridge, which is needed for the PCI
1420                  * interrupt links to work. DSDT fix is in bug 5966.
1421                  * 2645, 2646 model numbers are shared with 600/600E/600X
1422                  */
1423          .callback = disable_acpi_irq,
1424          .ident = "IBM Thinkpad 600 Series 2645",
1425          .matches = {
1426                      DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1427                      DMI_MATCH(DMI_BOARD_NAME, "2645"),
1428                      },
1429          },
1430         {
1431          .callback = disable_acpi_irq,
1432          .ident = "IBM Thinkpad 600 Series 2646",
1433          .matches = {
1434                      DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1435                      DMI_MATCH(DMI_BOARD_NAME, "2646"),
1436                      },
1437          },
1438         /*
1439          * Boxes that need ACPI PCI IRQ routing and PCI scan disabled
1440          */
1441         {                       /* _BBN 0 bug */
1442          .callback = disable_acpi_pci,
1443          .ident = "ASUS PR-DLS",
1444          .matches = {
1445                      DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1446                      DMI_MATCH(DMI_BOARD_NAME, "PR-DLS"),
1447                      DMI_MATCH(DMI_BIOS_VERSION,
1448                                "ASUS PR-DLS ACPI BIOS Revision 1010"),
1449                      DMI_MATCH(DMI_BIOS_DATE, "03/21/2003")
1450                      },
1451          },
1452         {
1453          .callback = disable_acpi_pci,
1454          .ident = "Acer TravelMate 36x Laptop",
1455          .matches = {
1456                      DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
1457                      DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"),
1458                      },
1459          },
1460         {}
1461 };
1462
1463 /* second table for DMI checks that should run after early-quirks */
1464 static struct dmi_system_id __initdata acpi_dmi_table_late[] = {
1465         /*
1466          * HP laptops which use a DSDT reporting as HP/SB400/10000,
1467          * which includes some code which overrides all temperature
1468          * trip points to 16C if the INTIN2 input of the I/O APIC
1469          * is enabled.  This input is incorrectly designated the
1470          * ISA IRQ 0 via an interrupt source override even though
1471          * it is wired to the output of the master 8259A and INTIN0
1472          * is not connected at all.  Force ignoring BIOS IRQ0 pin2
1473          * override in that cases.
1474          */
1475         {
1476          .callback = dmi_ignore_irq0_timer_override,
1477          .ident = "HP nx6115 laptop",
1478          .matches = {
1479                      DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1480                      DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6115"),
1481                      },
1482          },
1483         {
1484          .callback = dmi_ignore_irq0_timer_override,
1485          .ident = "HP NX6125 laptop",
1486          .matches = {
1487                      DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1488                      DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6125"),
1489                      },
1490          },
1491         {
1492          .callback = dmi_ignore_irq0_timer_override,
1493          .ident = "HP NX6325 laptop",
1494          .matches = {
1495                      DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1496                      DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6325"),
1497                      },
1498          },
1499         {
1500          .callback = dmi_ignore_irq0_timer_override,
1501          .ident = "HP 6715b laptop",
1502          .matches = {
1503                      DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1504                      DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq 6715b"),
1505                      },
1506          },
1507         {}
1508 };
1509
1510 /*
1511  * acpi_boot_table_init() and acpi_boot_init()
1512  *  called from setup_arch(), always.
1513  *      1. checksums all tables
1514  *      2. enumerates lapics
1515  *      3. enumerates io-apics
1516  *
1517  * acpi_table_init() is separate to allow reading SRAT without
1518  * other side effects.
1519  *
1520  * side effects of acpi_boot_init:
1521  *      acpi_lapic = 1 if LAPIC found
1522  *      acpi_ioapic = 1 if IOAPIC found
1523  *      if (acpi_lapic && acpi_ioapic) smp_found_config = 1;
1524  *      if acpi_blacklisted() acpi_disabled = 1;
1525  *      acpi_irq_model=...
1526  *      ...
1527  */
1528
1529 void __init acpi_boot_table_init(void)
1530 {
1531         dmi_check_system(acpi_dmi_table);
1532
1533         /*
1534          * If acpi_disabled, bail out
1535          */
1536         if (acpi_disabled)
1537                 return;
1538
1539         /*
1540          * Initialize the ACPI boot-time table parser.
1541          */
1542         if (acpi_table_init()) {
1543                 disable_acpi();
1544                 return;
1545         }
1546
1547         acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1548
1549         /*
1550          * blacklist may disable ACPI entirely
1551          */
1552         if (acpi_blacklisted()) {
1553                 if (acpi_force) {
1554                         printk(KERN_WARNING PREFIX "acpi=force override\n");
1555                 } else {
1556                         printk(KERN_WARNING PREFIX "Disabling ACPI support\n");
1557                         disable_acpi();
1558                         return;
1559                 }
1560         }
1561 }
1562
1563 int __init early_acpi_boot_init(void)
1564 {
1565         /*
1566          * If acpi_disabled, bail out
1567          */
1568         if (acpi_disabled)
1569                 return 1;
1570
1571         /*
1572          * Process the Multiple APIC Description Table (MADT), if present
1573          */
1574         early_acpi_process_madt();
1575
1576         return 0;
1577 }
1578
1579 int __init acpi_boot_init(void)
1580 {
1581         /* those are executed after early-quirks are executed */
1582         dmi_check_system(acpi_dmi_table_late);
1583
1584         /*
1585          * If acpi_disabled, bail out
1586          */
1587         if (acpi_disabled)
1588                 return 1;
1589
1590         acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1591
1592         /*
1593          * set sci_int and PM timer address
1594          */
1595         acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt);
1596
1597         /*
1598          * Process the Multiple APIC Description Table (MADT), if present
1599          */
1600         acpi_process_madt();
1601
1602         acpi_table_parse(ACPI_SIG_HPET, acpi_parse_hpet);
1603
1604         if (!acpi_noirq)
1605                 x86_init.pci.init = pci_acpi_init;
1606
1607         return 0;
1608 }
1609
1610 static int __init parse_acpi(char *arg)
1611 {
1612         if (!arg)
1613                 return -EINVAL;
1614
1615         /* "acpi=off" disables both ACPI table parsing and interpreter */
1616         if (strcmp(arg, "off") == 0) {
1617                 disable_acpi();
1618         }
1619         /* acpi=force to over-ride black-list */
1620         else if (strcmp(arg, "force") == 0) {
1621                 acpi_force = 1;
1622                 acpi_disabled = 0;
1623         }
1624         /* acpi=strict disables out-of-spec workarounds */
1625         else if (strcmp(arg, "strict") == 0) {
1626                 acpi_strict = 1;
1627         }
1628         /* acpi=rsdt use RSDT instead of XSDT */
1629         else if (strcmp(arg, "rsdt") == 0) {
1630                 acpi_rsdt_forced = 1;
1631         }
1632         /* "acpi=noirq" disables ACPI interrupt routing */
1633         else if (strcmp(arg, "noirq") == 0) {
1634                 acpi_noirq_set();
1635         }
1636         /* "acpi=copy_dsdt" copys DSDT */
1637         else if (strcmp(arg, "copy_dsdt") == 0) {
1638                 acpi_gbl_copy_dsdt_locally = 1;
1639         } else {
1640                 /* Core will printk when we return error. */
1641                 return -EINVAL;
1642         }
1643         return 0;
1644 }
1645 early_param("acpi", parse_acpi);
1646
1647 /* FIXME: Using pci= for an ACPI parameter is a travesty. */
1648 static int __init parse_pci(char *arg)
1649 {
1650         if (arg && strcmp(arg, "noacpi") == 0)
1651                 acpi_disable_pci();
1652         return 0;
1653 }
1654 early_param("pci", parse_pci);
1655
1656 int __init acpi_mps_check(void)
1657 {
1658 #if defined(CONFIG_X86_LOCAL_APIC) && !defined(CONFIG_X86_MPPARSE)
1659 /* mptable code is not built-in*/
1660         if (acpi_disabled || acpi_noirq) {
1661                 printk(KERN_WARNING "MPS support code is not built-in.\n"
1662                        "Using acpi=off or acpi=noirq or pci=noacpi "
1663                        "may have problem\n");
1664                 return 1;
1665         }
1666 #endif
1667         return 0;
1668 }
1669
1670 #ifdef CONFIG_X86_IO_APIC
1671 static int __init parse_acpi_skip_timer_override(char *arg)
1672 {
1673         acpi_skip_timer_override = 1;
1674         return 0;
1675 }
1676 early_param("acpi_skip_timer_override", parse_acpi_skip_timer_override);
1677
1678 static int __init parse_acpi_use_timer_override(char *arg)
1679 {
1680         acpi_use_timer_override = 1;
1681         return 0;
1682 }
1683 early_param("acpi_use_timer_override", parse_acpi_use_timer_override);
1684 #endif /* CONFIG_X86_IO_APIC */
1685
1686 static int __init setup_acpi_sci(char *s)
1687 {
1688         if (!s)
1689                 return -EINVAL;
1690         if (!strcmp(s, "edge"))
1691                 acpi_sci_flags =  ACPI_MADT_TRIGGER_EDGE |
1692                         (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1693         else if (!strcmp(s, "level"))
1694                 acpi_sci_flags = ACPI_MADT_TRIGGER_LEVEL |
1695                         (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1696         else if (!strcmp(s, "high"))
1697                 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_HIGH |
1698                         (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1699         else if (!strcmp(s, "low"))
1700                 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_LOW |
1701                         (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1702         else
1703                 return -EINVAL;
1704         return 0;
1705 }
1706 early_param("acpi_sci", setup_acpi_sci);
1707
1708 int __acpi_acquire_global_lock(unsigned int *lock)
1709 {
1710         unsigned int old, new, val;
1711         do {
1712                 old = *lock;
1713                 new = (((old & ~0x3) + 2) + ((old >> 1) & 0x1));
1714                 val = cmpxchg(lock, old, new);
1715         } while (unlikely (val != old));
1716         return (new < 3) ? -1 : 0;
1717 }
1718
1719 int __acpi_release_global_lock(unsigned int *lock)
1720 {
1721         unsigned int old, new, val;
1722         do {
1723                 old = *lock;
1724                 new = old & ~0x3;
1725                 val = cmpxchg(lock, old, new);
1726         } while (unlikely (val != old));
1727         return old & 0x1;
1728 }