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
  76 #ifdef CONFIG_X86_LOCAL_APIC
  77 static u64 acpi_lapic_addr __initdata = APIC_DEFAULT_PHYS_BASE;
  78 #endif
  79
  80 #ifndef __HAVE_ARCH_CMPXCHG
  81 #warning ACPI uses CMPXCHG, i486 and later hardware
  82 #endif
  83
  84 /* --------------------------------------------------------------------------
  85                               Boot-time Configuration
  86    -------------------------------------------------------------------------- */
  87
  88 /*
  89  * The default interrupt routing model is PIC (8259).  This gets
  90  * overridden if IOAPICs are enumerated (below).
  91  */
  92 enum acpi_irq_model_id acpi_irq_model = ACPI_IRQ_MODEL_PIC;
  93
  94
  95 /*
  96  * ISA irqs by default are the first 16 gsis but can be
  97  * any gsi as specified by an interrupt source override.
  98  */
  99 static u32 isa_irq_to_gsi[NR_IRQS_LEGACY] __read_mostly = {
 100         0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15
 101 };
 102
 103 static unsigned int gsi_to_irq(unsigned int gsi)
 104 {
 105         unsigned int irq = gsi + NR_IRQS_LEGACY;
 106         unsigned int i;
 107
 108         for (i = 0; i < NR_IRQS_LEGACY; i++) {
 109                 if (isa_irq_to_gsi[i] == gsi) {
 110                         return i;
 111                 }
 112         }
 113
 114         /* Provide an identity mapping of gsi == irq
 115          * except on truly weird platforms that have
 116          * non isa irqs in the first 16 gsis.
 117          */
 118         if (gsi >= NR_IRQS_LEGACY)
 119                 irq = gsi;
 120         else
 121                 irq = gsi_top + gsi;
 122
 123         return irq;
 124 }
 125
 126 static u32 irq_to_gsi(int irq)
 127 {
 128         unsigned int gsi;
 129
 130         if (irq < NR_IRQS_LEGACY)
 131                 gsi = isa_irq_to_gsi[irq];
 132         else if (irq < gsi_top)
 133                 gsi = irq;
 134         else if (irq < (gsi_top + NR_IRQS_LEGACY))
 135                 gsi = irq - gsi_top;
 136         else
 137                 gsi = 0xffffffff;
 138
 139         return gsi;
 140 }
 141
 142 /*
 143  * Temporarily use the virtual area starting from FIX_IO_APIC_BASE_END,
 144  * to map the target physical address. The problem is that set_fixmap()
 145  * provides a single page, and it is possible that the page is not
 146  * sufficient.
 147  * By using this area, we can map up to MAX_IO_APICS pages temporarily,
 148  * i.e. until the next __va_range() call.
 149  *
 150  * Important Safety Note:  The fixed I/O APIC page numbers are *subtracted*
 151  * from the fixed base.  That's why we start at FIX_IO_APIC_BASE_END and
 152  * count idx down while incrementing the phys address.
 153  */
 154 char *__init __acpi_map_table(unsigned long phys, unsigned long size)
 155 {
 156
 157         if (!phys || !size)
 158                 return NULL;
 159
 160         return early_ioremap(phys, size);
 161 }
 162 void __init __acpi_unmap_table(char *map, unsigned long size)
 163 {
 164         if (!map || !size)
 165                 return;
 166
 167         early_iounmap(map, size);
 168 }
 169
 170 #ifdef CONFIG_X86_LOCAL_APIC
 171 static int __init acpi_parse_madt(struct acpi_table_header *table)
 172 {
 173         struct acpi_table_madt *madt = NULL;
 174
 175         if (!cpu_has_apic)
 176                 return -EINVAL;
 177
 178         madt = (struct acpi_table_madt *)table;
 179         if (!madt) {
 180                 printk(KERN_WARNING PREFIX "Unable to map MADT\n");
 181                 return -ENODEV;
 182         }
 183
 184         if (madt->address) {
 185                 acpi_lapic_addr = (u64) madt->address;
 186
 187                 printk(KERN_DEBUG PREFIX "Local APIC address 0x%08x\n",
 188                        madt->address);
 189         }
 190
 191         default_acpi_madt_oem_check(madt->header.oem_id,
 192                                     madt->header.oem_table_id);
 193
 194         return 0;
 195 }
 196
 197 static void __cpuinit acpi_register_lapic(int id, u8 enabled)
 198 {
 199         unsigned int ver = 0;
 200
 201         if (id >= (MAX_LOCAL_APIC-1)) {
 202                 printk(KERN_INFO PREFIX "skipped apicid that is too big\n");
 203                 return;
 204         }
 205
 206         if (!enabled) {
 207                 ++disabled_cpus;
 208                 return;
 209         }
 210
 211         if (boot_cpu_physical_apicid != -1U)
 212                 ver = apic_version[boot_cpu_physical_apicid];
 213
 214         generic_processor_info(id, ver);
 215 }
 216
 217 static int __init
 218 acpi_parse_x2apic(struct acpi_subtable_header *header, const unsigned long end)
 219 {
 220         struct acpi_madt_local_x2apic *processor = NULL;
 221
 222         processor = (struct acpi_madt_local_x2apic *)header;
 223
 224         if (BAD_MADT_ENTRY(processor, end))
 225                 return -EINVAL;
 226
 227         acpi_table_print_madt_entry(header);
 228
 229 #ifdef CONFIG_X86_X2APIC
 230         /*
 231          * We need to register disabled CPU as well to permit
 232          * counting disabled CPUs. This allows us to size
 233          * cpus_possible_map more accurately, to permit
 234          * to not preallocating memory for all NR_CPUS
 235          * when we use CPU hotplug.
 236          */
 237         acpi_register_lapic(processor->local_apic_id,   /* APIC ID */
 238                             processor->lapic_flags & ACPI_MADT_ENABLED);
 239 #else
 240         printk(KERN_WARNING PREFIX "x2apic entry ignored\n");
 241 #endif
 242
 243         return 0;
 244 }
 245
 246 static int __init
 247 acpi_parse_lapic(struct acpi_subtable_header * header, const unsigned long end)
 248 {
 249         struct acpi_madt_local_apic *processor = NULL;
 250
 251         processor = (struct acpi_madt_local_apic *)header;
 252
 253         if (BAD_MADT_ENTRY(processor, end))
 254                 return -EINVAL;
 255
 256         acpi_table_print_madt_entry(header);
 257
 258         /*
 259          * We need to register disabled CPU as well to permit
 260          * counting disabled CPUs. This allows us to size
 261          * cpus_possible_map more accurately, to permit
 262          * to not preallocating memory for all NR_CPUS
 263          * when we use CPU hotplug.
 264          */
 265         acpi_register_lapic(processor->id,      /* APIC ID */
 266                             processor->lapic_flags & ACPI_MADT_ENABLED);
 267
 268         return 0;
 269 }
 270
 271 static int __init
 272 acpi_parse_sapic(struct acpi_subtable_header *header, const unsigned long end)
 273 {
 274         struct acpi_madt_local_sapic *processor = NULL;
 275
 276         processor = (struct acpi_madt_local_sapic *)header;
 277
 278         if (BAD_MADT_ENTRY(processor, end))
 279                 return -EINVAL;
 280
 281         acpi_table_print_madt_entry(header);
 282
 283         acpi_register_lapic((processor->id << 8) | processor->eid,/* APIC ID */
 284                             processor->lapic_flags & ACPI_MADT_ENABLED);
 285
 286         return 0;
 287 }
 288
 289 static int __init
 290 acpi_parse_lapic_addr_ovr(struct acpi_subtable_header * header,
 291                           const unsigned long end)
 292 {
 293         struct acpi_madt_local_apic_override *lapic_addr_ovr = NULL;
 294
 295         lapic_addr_ovr = (struct acpi_madt_local_apic_override *)header;
 296
 297         if (BAD_MADT_ENTRY(lapic_addr_ovr, end))
 298                 return -EINVAL;
 299
 300         acpi_lapic_addr = lapic_addr_ovr->address;
 301
 302         return 0;
 303 }
 304
 305 static int __init
 306 acpi_parse_x2apic_nmi(struct acpi_subtable_header *header,
 307                       const unsigned long end)
 308 {
 309         struct acpi_madt_local_x2apic_nmi *x2apic_nmi = NULL;
 310
 311         x2apic_nmi = (struct acpi_madt_local_x2apic_nmi *)header;
 312
 313         if (BAD_MADT_ENTRY(x2apic_nmi, end))
 314                 return -EINVAL;
 315
 316         acpi_table_print_madt_entry(header);
 317
 318         if (x2apic_nmi->lint != 1)
 319                 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n");
 320
 321         return 0;
 322 }
 323
 324 static int __init
 325 acpi_parse_lapic_nmi(struct acpi_subtable_header * header, const unsigned long end)
 326 {
 327         struct acpi_madt_local_apic_nmi *lapic_nmi = NULL;
 328
 329         lapic_nmi = (struct acpi_madt_local_apic_nmi *)header;
 330
 331         if (BAD_MADT_ENTRY(lapic_nmi, end))
 332                 return -EINVAL;
 333
 334         acpi_table_print_madt_entry(header);
 335
 336         if (lapic_nmi->lint != 1)
 337                 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n");
 338
 339         return 0;
 340 }
 341
 342 #endif                          /*CONFIG_X86_LOCAL_APIC */
 343
 344 #ifdef CONFIG_X86_IO_APIC
 345
 346 static int __init
 347 acpi_parse_ioapic(struct acpi_subtable_header * header, const unsigned long end)
 348 {
 349         struct acpi_madt_io_apic *ioapic = NULL;
 350
 351         ioapic = (struct acpi_madt_io_apic *)header;
 352
 353         if (BAD_MADT_ENTRY(ioapic, end))
 354                 return -EINVAL;
 355
 356         acpi_table_print_madt_entry(header);
 357
 358         mp_register_ioapic(ioapic->id,
 359                            ioapic->address, ioapic->global_irq_base);
 360
 361         return 0;
 362 }
 363
 364 /*
 365  * Parse Interrupt Source Override for the ACPI SCI
 366  */
 367 static void __init acpi_sci_ioapic_setup(u8 bus_irq, u16 polarity, u16 trigger, u32 gsi)
 368 {
 369         if (trigger == 0)       /* compatible SCI trigger is level */
 370                 trigger = 3;
 371
 372         if (polarity == 0)      /* compatible SCI polarity is low */
 373                 polarity = 3;
 374
 375         /* Command-line over-ride via acpi_sci= */
 376         if (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK)
 377                 trigger = (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2;
 378
 379         if (acpi_sci_flags & ACPI_MADT_POLARITY_MASK)
 380                 polarity = acpi_sci_flags & ACPI_MADT_POLARITY_MASK;
 381
 382         /*
 383          * mp_config_acpi_legacy_irqs() already setup IRQs < 16
 384          * If GSI is < 16, this will update its flags,
 385          * else it will create a new mp_irqs[] entry.
 386          */
 387         mp_override_legacy_irq(bus_irq, polarity, trigger, gsi);
 388
 389         /*
 390          * stash over-ride to indicate we've been here
 391          * and for later update of acpi_gbl_FADT
 392          */
 393         acpi_sci_override_gsi = gsi;
 394         return;
 395 }
 396
 397 static int __init
 398 acpi_parse_int_src_ovr(struct acpi_subtable_header * header,
 399                        const unsigned long end)
 400 {
 401         struct acpi_madt_interrupt_override *intsrc = NULL;
 402
 403         intsrc = (struct acpi_madt_interrupt_override *)header;
 404
 405         if (BAD_MADT_ENTRY(intsrc, end))
 406                 return -EINVAL;
 407
 408         acpi_table_print_madt_entry(header);
 409
 410         if (intsrc->source_irq == acpi_gbl_FADT.sci_interrupt) {
 411                 acpi_sci_ioapic_setup(intsrc->source_irq,
 412                                       intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
 413                                       (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2,
 414                                       intsrc->global_irq);
 415                 return 0;
 416         }
 417
 418         if (acpi_skip_timer_override &&
 419             intsrc->source_irq == 0 && intsrc->global_irq == 2) {
 420                 printk(PREFIX "BIOS IRQ0 pin2 override ignored.\n");
 421                 return 0;
 422         }
 423
 424         mp_override_legacy_irq(intsrc->source_irq,
 425                                 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
 426                                 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2,
 427                                 intsrc->global_irq);
 428
 429         return 0;
 430 }
 431
 432 static int __init
 433 acpi_parse_nmi_src(struct acpi_subtable_header * header, const unsigned long end)
 434 {
 435         struct acpi_madt_nmi_source *nmi_src = NULL;
 436
 437         nmi_src = (struct acpi_madt_nmi_source *)header;
 438
 439         if (BAD_MADT_ENTRY(nmi_src, end))
 440                 return -EINVAL;
 441
 442         acpi_table_print_madt_entry(header);
 443
 444         /* TBD: Support nimsrc entries? */
 445
 446         return 0;
 447 }
 448
 449 #endif                          /* CONFIG_X86_IO_APIC */
 450
 451 /*
 452  * acpi_pic_sci_set_trigger()
 453  *
 454  * use ELCR to set PIC-mode trigger type for SCI
 455  *
 456  * If a PIC-mode SCI is not recognized or gives spurious IRQ7's
 457  * it may require Edge Trigger -- use "acpi_sci=edge"
 458  *
 459  * Port 0x4d0-4d1 are ECLR1 and ECLR2, the Edge/Level Control Registers
 460  * for the 8259 PIC.  bit[n] = 1 means irq[n] is Level, otherwise Edge.
 461  * ECLR1 is IRQs 0-7 (IRQ 0, 1, 2 must be 0)
 462  * ECLR2 is IRQs 8-15 (IRQ 8, 13 must be 0)
 463  */
 464
 465 void __init acpi_pic_sci_set_trigger(unsigned int irq, u16 trigger)
 466 {
 467         unsigned int mask = 1 << irq;
 468         unsigned int old, new;
 469
 470         /* Real old ELCR mask */
 471         old = inb(0x4d0) | (inb(0x4d1) << 8);
 472
 473         /*
 474          * If we use ACPI to set PCI IRQs, then we should clear ELCR
 475          * since we will set it correctly as we enable the PCI irq
 476          * routing.
 477          */
 478         new = acpi_noirq ? old : 0;
 479
 480         /*
 481          * Update SCI information in the ELCR, it isn't in the PCI
 482          * routing tables..
 483          */
 484         switch (trigger) {
 485         case 1:         /* Edge - clear */
 486                 new &= ~mask;
 487                 break;
 488         case 3:         /* Level - set */
 489                 new |= mask;
 490                 break;
 491         }
 492
 493         if (old == new)
 494                 return;
 495
 496         printk(PREFIX "setting ELCR to %04x (from %04x)\n", new, old);
 497         outb(new, 0x4d0);
 498         outb(new >> 8, 0x4d1);
 499 }
 500
 501 int acpi_gsi_to_irq(u32 gsi, unsigned int *irq)
 502 {
 503         *irq = gsi_to_irq(gsi);
 504
 505 #ifdef CONFIG_X86_IO_APIC
 506         if (acpi_irq_model == ACPI_IRQ_MODEL_IOAPIC)
 507                 setup_IO_APIC_irq_extra(gsi);
 508 #endif
 509
 510         return 0;
 511 }
 512
 513 int acpi_isa_irq_to_gsi(unsigned isa_irq, u32 *gsi)
 514 {
 515         if (isa_irq >= 16)
 516                 return -1;
 517         *gsi = irq_to_gsi(isa_irq);
 518         return 0;
 519 }
 520
 521 static int acpi_register_gsi_pic(struct device *dev, u32 gsi,
 522                                  int trigger, int polarity)
 523 {
 524 #ifdef CONFIG_PCI
 525         /*
 526          * Make sure all (legacy) PCI IRQs are set as level-triggered.
 527          */
 528         if (trigger == ACPI_LEVEL_SENSITIVE)
 529                 eisa_set_level_irq(gsi);
 530 #endif
 531
 532         return gsi;
 533 }
 534
 535 static int acpi_register_gsi_ioapic(struct device *dev, u32 gsi,
 536                                     int trigger, int polarity)
 537 {
 538 #ifdef CONFIG_X86_IO_APIC
 539         gsi = mp_register_gsi(dev, gsi, trigger, polarity);
 540 #endif
 541
 542         return gsi;
 543 }
 544
 545 int (*__acpi_register_gsi)(struct device *dev, u32 gsi,
 546                            int trigger, int polarity) = acpi_register_gsi_pic;
 547
 548 /*
 549  * success: return IRQ number (>=0)
 550  * failure: return < 0
 551  */
 552 int acpi_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity)
 553 {
 554         unsigned int irq;
 555         unsigned int plat_gsi = gsi;
 556
 557         plat_gsi = (*__acpi_register_gsi)(dev, gsi, trigger, polarity);
 558         irq = gsi_to_irq(plat_gsi);
 559
 560         return irq;
 561 }
 562
 563 void __init acpi_set_irq_model_pic(void)
 564 {
 565         acpi_irq_model = ACPI_IRQ_MODEL_PIC;
 566         __acpi_register_gsi = acpi_register_gsi_pic;
 567         acpi_ioapic = 0;
 568 }
 569
 570 void __init acpi_set_irq_model_ioapic(void)
 571 {
 572         acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC;
 573         __acpi_register_gsi = acpi_register_gsi_ioapic;
 574         acpi_ioapic = 1;
 575 }
 576
 577 /*
 578  *  ACPI based hotplug support for CPU
 579  */
 580 #ifdef CONFIG_ACPI_HOTPLUG_CPU
 581 #include <acpi/processor.h>
 582
 583 static void acpi_map_cpu2node(acpi_handle handle, int cpu, int physid)
 584 {
 585 #ifdef CONFIG_ACPI_NUMA
 586         int nid;
 587
 588         nid = acpi_get_node(handle);
 589         if (nid == -1 || !node_online(nid))
 590                 return;
 591 #ifdef CONFIG_X86_64
 592         apicid_to_node[physid] = nid;
 593         numa_set_node(cpu, nid);
 594 #else /* CONFIG_X86_32 */
 595         apicid_2_node[physid] = nid;
 596         cpu_to_node_map[cpu] = nid;
 597 #endif
 598
 599 #endif
 600 }
 601
 602 static int __cpuinit _acpi_map_lsapic(acpi_handle handle, int *pcpu)
 603 {
 604         struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
 605         union acpi_object *obj;
 606         struct acpi_madt_local_apic *lapic;
 607         cpumask_var_t tmp_map, new_map;
 608         u8 physid;
 609         int cpu;
 610         int retval = -ENOMEM;
 611
 612         if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer)))
 613                 return -EINVAL;
 614
 615         if (!buffer.length || !buffer.pointer)
 616                 return -EINVAL;
 617
 618         obj = buffer.pointer;
 619         if (obj->type != ACPI_TYPE_BUFFER ||
 620             obj->buffer.length < sizeof(*lapic)) {
 621                 kfree(buffer.pointer);
 622                 return -EINVAL;
 623         }
 624
 625         lapic = (struct acpi_madt_local_apic *)obj->buffer.pointer;
 626
 627         if (lapic->header.type != ACPI_MADT_TYPE_LOCAL_APIC ||
 628             !(lapic->lapic_flags & ACPI_MADT_ENABLED)) {
 629                 kfree(buffer.pointer);
 630                 return -EINVAL;
 631         }
 632
 633         physid = lapic->id;
 634
 635         kfree(buffer.pointer);
 636         buffer.length = ACPI_ALLOCATE_BUFFER;
 637         buffer.pointer = NULL;
 638
 639         if (!alloc_cpumask_var(&tmp_map, GFP_KERNEL))
 640                 goto out;
 641
 642         if (!alloc_cpumask_var(&new_map, GFP_KERNEL))
 643                 goto free_tmp_map;
 644
 645         cpumask_copy(tmp_map, cpu_present_mask);
 646         acpi_register_lapic(physid, lapic->lapic_flags & ACPI_MADT_ENABLED);
 647
 648         /*
 649          * If mp_register_lapic successfully generates a new logical cpu
 650          * number, then the following will get us exactly what was mapped
 651          */
 652         cpumask_andnot(new_map, cpu_present_mask, tmp_map);
 653         if (cpumask_empty(new_map)) {
 654                 printk ("Unable to map lapic to logical cpu number\n");
 655                 retval = -EINVAL;
 656                 goto free_new_map;
 657         }
 658
 659         acpi_processor_set_pdc(handle);
 660
 661         cpu = cpumask_first(new_map);
 662         acpi_map_cpu2node(handle, cpu, physid);
 663
 664         *pcpu = cpu;
 665         retval = 0;
 666
 667 free_new_map:
 668         free_cpumask_var(new_map);
 669 free_tmp_map:
 670         free_cpumask_var(tmp_map);
 671 out:
 672         return retval;
 673 }
 674
 675 /* wrapper to silence section mismatch warning */
 676 int __ref acpi_map_lsapic(acpi_handle handle, int *pcpu)
 677 {
 678         return _acpi_map_lsapic(handle, pcpu);
 679 }
 680 EXPORT_SYMBOL(acpi_map_lsapic);
 681
 682 int acpi_unmap_lsapic(int cpu)
 683 {
 684         per_cpu(x86_cpu_to_apicid, cpu) = -1;
 685         set_cpu_present(cpu, false);
 686         num_processors--;
 687
 688         return (0);
 689 }
 690
 691 EXPORT_SYMBOL(acpi_unmap_lsapic);
 692 #endif                          /* CONFIG_ACPI_HOTPLUG_CPU */
 693
 694 int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base)
 695 {
 696         /* TBD */
 697         return -EINVAL;
 698 }
 699
 700 EXPORT_SYMBOL(acpi_register_ioapic);
 701
 702 int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base)
 703 {
 704         /* TBD */
 705         return -EINVAL;
 706 }
 707
 708 EXPORT_SYMBOL(acpi_unregister_ioapic);
 709
 710 static int __init acpi_parse_sbf(struct acpi_table_header *table)
 711 {
 712         struct acpi_table_boot *sb;
 713
 714         sb = (struct acpi_table_boot *)table;
 715         if (!sb) {
 716                 printk(KERN_WARNING PREFIX "Unable to map SBF\n");
 717                 return -ENODEV;
 718         }
 719
 720         sbf_port = sb->cmos_index;      /* Save CMOS port */
 721
 722         return 0;
 723 }
 724
 725 #ifdef CONFIG_HPET_TIMER
 726 #include <asm/hpet.h>
 727
 728 static struct __initdata resource *hpet_res;
 729
 730 static int __init acpi_parse_hpet(struct acpi_table_header *table)
 731 {
 732         struct acpi_table_hpet *hpet_tbl;
 733
 734         hpet_tbl = (struct acpi_table_hpet *)table;
 735         if (!hpet_tbl) {
 736                 printk(KERN_WARNING PREFIX "Unable to map HPET\n");
 737                 return -ENODEV;
 738         }
 739
 740         if (hpet_tbl->address.space_id != ACPI_SPACE_MEM) {
 741                 printk(KERN_WARNING PREFIX "HPET timers must be located in "
 742                        "memory.\n");
 743                 return -1;
 744         }
 745
 746         hpet_address = hpet_tbl->address.address;
 747         hpet_blockid = hpet_tbl->sequence;
 748
 749         /*
 750          * Some broken BIOSes advertise HPET at 0x0. We really do not
 751          * want to allocate a resource there.
 752          */
 753         if (!hpet_address) {
 754                 printk(KERN_WARNING PREFIX
 755                        "HPET id: %#x base: %#lx is invalid\n",
 756                        hpet_tbl->id, hpet_address);
 757                 return 0;
 758         }
 759 #ifdef CONFIG_X86_64
 760         /*
 761          * Some even more broken BIOSes advertise HPET at
 762          * 0xfed0000000000000 instead of 0xfed00000. Fix it up and add
 763          * some noise:
 764          */
 765         if (hpet_address == 0xfed0000000000000UL) {
 766                 if (!hpet_force_user) {
 767                         printk(KERN_WARNING PREFIX "HPET id: %#x "
 768                                "base: 0xfed0000000000000 is bogus\n "
 769                                "try hpet=force on the kernel command line to "
 770                                "fix it up to 0xfed00000.\n", hpet_tbl->id);
 771                         hpet_address = 0;
 772                         return 0;
 773                 }
 774                 printk(KERN_WARNING PREFIX
 775                        "HPET id: %#x base: 0xfed0000000000000 fixed up "
 776                        "to 0xfed00000.\n", hpet_tbl->id);
 777                 hpet_address >>= 32;
 778         }
 779 #endif
 780         printk(KERN_INFO PREFIX "HPET id: %#x base: %#lx\n",
 781                hpet_tbl->id, hpet_address);
 782
 783         /*
 784          * Allocate and initialize the HPET firmware resource for adding into
 785          * the resource tree during the lateinit timeframe.
 786          */
 787 #define HPET_RESOURCE_NAME_SIZE 9
 788         hpet_res = alloc_bootmem(sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE);
 789
 790         hpet_res->name = (void *)&hpet_res[1];
 791         hpet_res->flags = IORESOURCE_MEM;
 792         snprintf((char *)hpet_res->name, HPET_RESOURCE_NAME_SIZE, "HPET %u",
 793                  hpet_tbl->sequence);
 794
 795         hpet_res->start = hpet_address;
 796         hpet_res->end = hpet_address + (1 * 1024) - 1;
 797
 798         return 0;
 799 }
 800
 801 /*
 802  * hpet_insert_resource inserts the HPET resources used into the resource
 803  * tree.
 804  */
 805 static __init int hpet_insert_resource(void)
 806 {
 807         if (!hpet_res)
 808                 return 1;
 809
 810         return insert_resource(&iomem_resource, hpet_res);
 811 }
 812
 813 late_initcall(hpet_insert_resource);
 814
 815 #else
 816 #define acpi_parse_hpet NULL
 817 #endif
 818
 819 static int __init acpi_parse_fadt(struct acpi_table_header *table)
 820 {
 821
 822 #ifdef CONFIG_X86_PM_TIMER
 823         /* detect the location of the ACPI PM Timer */
 824         if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID) {
 825                 /* FADT rev. 2 */
 826                 if (acpi_gbl_FADT.xpm_timer_block.space_id !=
 827                     ACPI_ADR_SPACE_SYSTEM_IO)
 828                         return 0;
 829
 830                 pmtmr_ioport = acpi_gbl_FADT.xpm_timer_block.address;
 831                 /*
 832                  * "X" fields are optional extensions to the original V1.0
 833                  * fields, so we must selectively expand V1.0 fields if the
 834                  * corresponding X field is zero.
 835                  */
 836                 if (!pmtmr_ioport)
 837                         pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
 838         } else {
 839                 /* FADT rev. 1 */
 840                 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
 841         }
 842         if (pmtmr_ioport)
 843                 printk(KERN_INFO PREFIX "PM-Timer IO Port: %#x\n",
 844                        pmtmr_ioport);
 845 #endif
 846         return 0;
 847 }
 848
 849 #ifdef  CONFIG_X86_LOCAL_APIC
 850 /*
 851  * Parse LAPIC entries in MADT
 852  * returns 0 on success, < 0 on error
 853  */
 854
 855 static void __init acpi_register_lapic_address(unsigned long address)
 856 {
 857         mp_lapic_addr = address;
 858
 859         set_fixmap_nocache(FIX_APIC_BASE, address);
 860         if (boot_cpu_physical_apicid == -1U) {
 861                 boot_cpu_physical_apicid  = read_apic_id();
 862                 apic_version[boot_cpu_physical_apicid] =
 863                          GET_APIC_VERSION(apic_read(APIC_LVR));
 864         }
 865 }
 866
 867 static int __init early_acpi_parse_madt_lapic_addr_ovr(void)
 868 {
 869         int count;
 870
 871         if (!cpu_has_apic)
 872                 return -ENODEV;
 873
 874         /*
 875          * Note that the LAPIC address is obtained from the MADT (32-bit value)
 876          * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value).
 877          */
 878
 879         count =
 880             acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
 881                                   acpi_parse_lapic_addr_ovr, 0);
 882         if (count < 0) {
 883                 printk(KERN_ERR PREFIX
 884                        "Error parsing LAPIC address override entry\n");
 885                 return count;
 886         }
 887
 888         acpi_register_lapic_address(acpi_lapic_addr);
 889
 890         return count;
 891 }
 892
 893 static int __init acpi_parse_madt_lapic_entries(void)
 894 {
 895         int count;
 896         int x2count = 0;
 897
 898         if (!cpu_has_apic)
 899                 return -ENODEV;
 900
 901         /*
 902          * Note that the LAPIC address is obtained from the MADT (32-bit value)
 903          * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value).
 904          */
 905
 906         count =
 907             acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
 908                                   acpi_parse_lapic_addr_ovr, 0);
 909         if (count < 0) {
 910                 printk(KERN_ERR PREFIX
 911                        "Error parsing LAPIC address override entry\n");
 912                 return count;
 913         }
 914
 915         acpi_register_lapic_address(acpi_lapic_addr);
 916
 917         count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC,
 918                                       acpi_parse_sapic, MAX_LOCAL_APIC);
 919
 920         if (!count) {
 921                 x2count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC,
 922                                         acpi_parse_x2apic, MAX_LOCAL_APIC);
 923                 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC,
 924                                         acpi_parse_lapic, MAX_LOCAL_APIC);
 925         }
 926         if (!count && !x2count) {
 927                 printk(KERN_ERR PREFIX "No LAPIC entries present\n");
 928                 /* TBD: Cleanup to allow fallback to MPS */
 929                 return -ENODEV;
 930         } else if (count < 0 || x2count < 0) {
 931                 printk(KERN_ERR PREFIX "Error parsing LAPIC entry\n");
 932                 /* TBD: Cleanup to allow fallback to MPS */
 933                 return count;
 934         }
 935
 936         x2count =
 937             acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC_NMI,
 938                                   acpi_parse_x2apic_nmi, 0);
 939         count =
 940             acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI, acpi_parse_lapic_nmi, 0);
 941         if (count < 0 || x2count < 0) {
 942                 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n");
 943                 /* TBD: Cleanup to allow fallback to MPS */
 944                 return count;
 945         }
 946         return 0;
 947 }
 948 #endif                          /* CONFIG_X86_LOCAL_APIC */
 949
 950 #ifdef  CONFIG_X86_IO_APIC
 951 #define MP_ISA_BUS              0
 952
 953 #ifdef CONFIG_X86_ES7000
 954 extern int es7000_plat;
 955 #endif
 956
 957 static void assign_to_mp_irq(struct mpc_intsrc *m,
 958                                     struct mpc_intsrc *mp_irq)
 959 {
 960         memcpy(mp_irq, m, sizeof(struct mpc_intsrc));
 961 }
 962
 963 static int mp_irq_cmp(struct mpc_intsrc *mp_irq,
 964                                 struct mpc_intsrc *m)
 965 {
 966         return memcmp(mp_irq, m, sizeof(struct mpc_intsrc));
 967 }
 968
 969 static void save_mp_irq(struct mpc_intsrc *m)
 970 {
 971         int i;
 972
 973         for (i = 0; i < mp_irq_entries; i++) {
 974                 if (!mp_irq_cmp(&mp_irqs[i], m))
 975                         return;
 976         }
 977
 978         assign_to_mp_irq(m, &mp_irqs[mp_irq_entries]);
 979         if (++mp_irq_entries == MAX_IRQ_SOURCES)
 980                 panic("Max # of irq sources exceeded!!\n");
 981 }
 982
 983 void __init mp_override_legacy_irq(u8 bus_irq, u8 polarity, u8 trigger, u32 gsi)
 984 {
 985         int ioapic;
 986         int pin;
 987         struct mpc_intsrc mp_irq;
 988
 989         /*
 990          * Convert 'gsi' to 'ioapic.pin'.
 991          */
 992         ioapic = mp_find_ioapic(gsi);
 993         if (ioapic < 0)
 994                 return;
 995         pin = mp_find_ioapic_pin(ioapic, gsi);
 996
 997         /*
 998          * TBD: This check is for faulty timer entries, where the override
 999          *      erroneously sets the trigger to level, resulting in a HUGE
1000          *      increase of timer interrupts!
1001          */
1002         if ((bus_irq == 0) && (trigger == 3))
1003                 trigger = 1;
1004
1005         mp_irq.type = MP_INTSRC;
1006         mp_irq.irqtype = mp_INT;
1007         mp_irq.irqflag = (trigger << 2) | polarity;
1008         mp_irq.srcbus = MP_ISA_BUS;
1009         mp_irq.srcbusirq = bus_irq;     /* IRQ */
1010         mp_irq.dstapic = mp_ioapics[ioapic].apicid; /* APIC ID */
1011         mp_irq.dstirq = pin;    /* INTIN# */
1012
1013         save_mp_irq(&mp_irq);
1014
1015         isa_irq_to_gsi[bus_irq] = gsi;
1016 }
1017
1018 void __init mp_config_acpi_legacy_irqs(void)
1019 {
1020         int i;
1021         struct mpc_intsrc mp_irq;
1022
1023 #if defined (CONFIG_MCA) || defined (CONFIG_EISA)
1024         /*
1025          * Fabricate the legacy ISA bus (bus #31).
1026          */
1027         mp_bus_id_to_type[MP_ISA_BUS] = MP_BUS_ISA;
1028 #endif
1029         set_bit(MP_ISA_BUS, mp_bus_not_pci);
1030         pr_debug("Bus #%d is ISA\n", MP_ISA_BUS);
1031
1032 #ifdef CONFIG_X86_ES7000
1033         /*
1034          * Older generations of ES7000 have no legacy identity mappings
1035          */
1036         if (es7000_plat == 1)
1037                 return;
1038 #endif
1039
1040         /*
1041          * Use the default configuration for the IRQs 0-15.  Unless
1042          * overridden by (MADT) interrupt source override entries.
1043          */
1044         for (i = 0; i < 16; i++) {
1045                 int ioapic, pin;
1046                 unsigned int dstapic;
1047                 int idx;
1048                 u32 gsi;
1049
1050                 /* Locate the gsi that irq i maps to. */
1051                 if (acpi_isa_irq_to_gsi(i, &gsi))
1052                         continue;
1053
1054                 /*
1055                  * Locate the IOAPIC that manages the ISA IRQ.
1056                  */
1057                 ioapic = mp_find_ioapic(gsi);
1058                 if (ioapic < 0)
1059                         continue;
1060                 pin = mp_find_ioapic_pin(ioapic, gsi);
1061                 dstapic = mp_ioapics[ioapic].apicid;
1062
1063                 for (idx = 0; idx < mp_irq_entries; idx++) {
1064                         struct mpc_intsrc *irq = mp_irqs + idx;
1065
1066                         /* Do we already have a mapping for this ISA IRQ? */
1067                         if (irq->srcbus == MP_ISA_BUS && irq->srcbusirq == i)
1068                                 break;
1069
1070                         /* Do we already have a mapping for this IOAPIC pin */
1071                         if (irq->dstapic == dstapic && irq->dstirq == pin)
1072                                 break;
1073                 }
1074
1075                 if (idx != mp_irq_entries) {
1076                         printk(KERN_DEBUG "ACPI: IRQ%d used by override.\n", i);
1077                         continue;       /* IRQ already used */
1078                 }
1079
1080                 mp_irq.type = MP_INTSRC;
1081                 mp_irq.irqflag = 0;     /* Conforming */
1082                 mp_irq.srcbus = MP_ISA_BUS;
1083                 mp_irq.dstapic = dstapic;
1084                 mp_irq.irqtype = mp_INT;
1085                 mp_irq.srcbusirq = i; /* Identity mapped */
1086                 mp_irq.dstirq = pin;
1087
1088                 save_mp_irq(&mp_irq);
1089         }
1090 }
1091
1092 static int mp_config_acpi_gsi(struct device *dev, u32 gsi, int trigger,
1093                         int polarity)
1094 {
1095 #ifdef CONFIG_X86_MPPARSE
1096         struct mpc_intsrc mp_irq;
1097         struct pci_dev *pdev;
1098         unsigned char number;
1099         unsigned int devfn;
1100         int ioapic;
1101         u8 pin;
1102
1103         if (!acpi_ioapic)
1104                 return 0;
1105         if (!dev)
1106                 return 0;
1107         if (dev->bus != &pci_bus_type)
1108                 return 0;
1109
1110         pdev = to_pci_dev(dev);
1111         number = pdev->bus->number;
1112         devfn = pdev->devfn;
1113         pin = pdev->pin;
1114         /* print the entry should happen on mptable identically */
1115         mp_irq.type = MP_INTSRC;
1116         mp_irq.irqtype = mp_INT;
1117         mp_irq.irqflag = (trigger == ACPI_EDGE_SENSITIVE ? 4 : 0x0c) |
1118                                 (polarity == ACPI_ACTIVE_HIGH ? 1 : 3);
1119         mp_irq.srcbus = number;
1120         mp_irq.srcbusirq = (((devfn >> 3) & 0x1f) << 2) | ((pin - 1) & 3);
1121         ioapic = mp_find_ioapic(gsi);
1122         mp_irq.dstapic = mp_ioapics[ioapic].apicid;
1123         mp_irq.dstirq = mp_find_ioapic_pin(ioapic, gsi);
1124
1125         save_mp_irq(&mp_irq);
1126 #endif
1127         return 0;
1128 }
1129
1130 int mp_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity)
1131 {
1132         int ioapic;
1133         int ioapic_pin;
1134         struct io_apic_irq_attr irq_attr;
1135
1136         if (acpi_irq_model != ACPI_IRQ_MODEL_IOAPIC)
1137                 return gsi;
1138
1139         /* Don't set up the ACPI SCI because it's already set up */
1140         if (acpi_gbl_FADT.sci_interrupt == gsi)
1141                 return gsi;
1142
1143         ioapic = mp_find_ioapic(gsi);
1144         if (ioapic < 0) {
1145                 printk(KERN_WARNING "No IOAPIC for GSI %u\n", gsi);
1146                 return gsi;
1147         }
1148
1149         ioapic_pin = mp_find_ioapic_pin(ioapic, gsi);
1150
1151         if (ioapic_pin > MP_MAX_IOAPIC_PIN) {
1152                 printk(KERN_ERR "Invalid reference to IOAPIC pin "
1153                        "%d-%d\n", mp_ioapics[ioapic].apicid,
1154                        ioapic_pin);
1155                 return gsi;
1156         }
1157
1158         if (enable_update_mptable)
1159                 mp_config_acpi_gsi(dev, gsi, trigger, polarity);
1160
1161         set_io_apic_irq_attr(&irq_attr, ioapic, ioapic_pin,
1162                              trigger == ACPI_EDGE_SENSITIVE ? 0 : 1,
1163                              polarity == ACPI_ACTIVE_HIGH ? 0 : 1);
1164         io_apic_set_pci_routing(dev, gsi_to_irq(gsi), &irq_attr);
1165
1166         return gsi;
1167 }
1168
1169 /*
1170  * Parse IOAPIC related entries in MADT
1171  * returns 0 on success, < 0 on error
1172  */
1173 static int __init acpi_parse_madt_ioapic_entries(void)
1174 {
1175         int count;
1176
1177         /*
1178          * ACPI interpreter is required to complete interrupt setup,
1179          * so if it is off, don't enumerate the io-apics with ACPI.
1180          * If MPS is present, it will handle them,
1181          * otherwise the system will stay in PIC mode
1182          */
1183         if (acpi_disabled || acpi_noirq)
1184                 return -ENODEV;
1185
1186         if (!cpu_has_apic)
1187                 return -ENODEV;
1188
1189         /*
1190          * if "noapic" boot option, don't look for IO-APICs
1191          */
1192         if (skip_ioapic_setup) {
1193                 printk(KERN_INFO PREFIX "Skipping IOAPIC probe "
1194                        "due to 'noapic' option.\n");
1195                 return -ENODEV;
1196         }
1197
1198         count =
1199             acpi_table_parse_madt(ACPI_MADT_TYPE_IO_APIC, acpi_parse_ioapic,
1200                                   MAX_IO_APICS);
1201         if (!count) {
1202                 printk(KERN_ERR PREFIX "No IOAPIC entries present\n");
1203                 return -ENODEV;
1204         } else if (count < 0) {
1205                 printk(KERN_ERR PREFIX "Error parsing IOAPIC entry\n");
1206                 return count;
1207         }
1208
1209         count =
1210             acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE, acpi_parse_int_src_ovr,
1211                                   nr_irqs);
1212         if (count < 0) {
1213                 printk(KERN_ERR PREFIX
1214                        "Error parsing interrupt source overrides entry\n");
1215                 /* TBD: Cleanup to allow fallback to MPS */
1216                 return count;
1217         }
1218
1219         /*
1220          * If BIOS did not supply an INT_SRC_OVR for the SCI
1221          * pretend we got one so we can set the SCI flags.
1222          */
1223         if (!acpi_sci_override_gsi)
1224                 acpi_sci_ioapic_setup(acpi_gbl_FADT.sci_interrupt, 0, 0,
1225                                       acpi_gbl_FADT.sci_interrupt);
1226
1227         /* Fill in identity legacy mappings where no override */
1228         mp_config_acpi_legacy_irqs();
1229
1230         count =
1231             acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE, acpi_parse_nmi_src,
1232                                   nr_irqs);
1233         if (count < 0) {
1234                 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n");
1235                 /* TBD: Cleanup to allow fallback to MPS */
1236                 return count;
1237         }
1238
1239         return 0;
1240 }
1241 #else
1242 static inline int acpi_parse_madt_ioapic_entries(void)
1243 {
1244         return -1;
1245 }
1246 #endif  /* !CONFIG_X86_IO_APIC */
1247
1248 static void __init early_acpi_process_madt(void)
1249 {
1250 #ifdef CONFIG_X86_LOCAL_APIC
1251         int error;
1252
1253         if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1254
1255                 /*
1256                  * Parse MADT LAPIC entries
1257                  */
1258                 error = early_acpi_parse_madt_lapic_addr_ovr();
1259                 if (!error) {
1260                         acpi_lapic = 1;
1261                         smp_found_config = 1;
1262                 }
1263                 if (error == -EINVAL) {
1264                         /*
1265                          * Dell Precision Workstation 410, 610 come here.
1266                          */
1267                         printk(KERN_ERR PREFIX
1268                                "Invalid BIOS MADT, disabling ACPI\n");
1269                         disable_acpi();
1270                 }
1271         }
1272 #endif
1273 }
1274
1275 static void __init acpi_process_madt(void)
1276 {
1277 #ifdef CONFIG_X86_LOCAL_APIC
1278         int error;
1279
1280         if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1281
1282                 /*
1283                  * Parse MADT LAPIC entries
1284                  */
1285                 error = acpi_parse_madt_lapic_entries();
1286                 if (!error) {
1287                         acpi_lapic = 1;
1288
1289                         /*
1290                          * Parse MADT IO-APIC entries
1291                          */
1292                         error = acpi_parse_madt_ioapic_entries();
1293                         if (!error) {
1294                                 acpi_set_irq_model_ioapic();
1295
1296                                 smp_found_config = 1;
1297                         }
1298                 }
1299                 if (error == -EINVAL) {
1300                         /*
1301                          * Dell Precision Workstation 410, 610 come here.
1302                          */
1303                         printk(KERN_ERR PREFIX
1304                                "Invalid BIOS MADT, disabling ACPI\n");
1305                         disable_acpi();
1306                 }
1307         } else {
1308                 /*
1309                  * ACPI found no MADT, and so ACPI wants UP PIC mode.
1310                  * In the event an MPS table was found, forget it.
1311                  * Boot with "acpi=off" to use MPS on such a system.
1312                  */
1313                 if (smp_found_config) {
1314                         printk(KERN_WARNING PREFIX
1315                                 "No APIC-table, disabling MPS\n");
1316                         smp_found_config = 0;
1317                 }
1318         }
1319
1320         /*
1321          * ACPI supports both logical (e.g. Hyper-Threading) and physical
1322          * processors, where MPS only supports physical.
1323          */
1324         if (acpi_lapic && acpi_ioapic)
1325                 printk(KERN_INFO "Using ACPI (MADT) for SMP configuration "
1326                        "information\n");
1327         else if (acpi_lapic)
1328                 printk(KERN_INFO "Using ACPI for processor (LAPIC) "
1329                        "configuration information\n");
1330 #endif
1331         return;
1332 }
1333
1334 static int __init disable_acpi_irq(const struct dmi_system_id *d)
1335 {
1336         if (!acpi_force) {
1337                 printk(KERN_NOTICE "%s detected: force use of acpi=noirq\n",
1338                        d->ident);
1339                 acpi_noirq_set();
1340         }
1341         return 0;
1342 }
1343
1344 static int __init disable_acpi_pci(const struct dmi_system_id *d)
1345 {
1346         if (!acpi_force) {
1347                 printk(KERN_NOTICE "%s detected: force use of pci=noacpi\n",
1348                        d->ident);
1349                 acpi_disable_pci();
1350         }
1351         return 0;
1352 }
1353
1354 static int __init dmi_disable_acpi(const struct dmi_system_id *d)
1355 {
1356         if (!acpi_force) {
1357                 printk(KERN_NOTICE "%s detected: acpi off\n", d->ident);
1358                 disable_acpi();
1359         } else {
1360                 printk(KERN_NOTICE
1361                        "Warning: DMI blacklist says broken, but acpi forced\n");
1362         }
1363         return 0;
1364 }
1365
1366 /*
1367  * Force ignoring BIOS IRQ0 pin2 override
1368  */
1369 static int __init dmi_ignore_irq0_timer_override(const struct dmi_system_id *d)
1370 {
1371         /*
1372          * The ati_ixp4x0_rev() early PCI quirk should have set
1373          * the acpi_skip_timer_override flag already:
1374          */
1375         if (!acpi_skip_timer_override) {
1376                 WARN(1, KERN_ERR "ati_ixp4x0 quirk not complete.\n");
1377                 pr_notice("%s detected: Ignoring BIOS IRQ0 pin2 override\n",
1378                         d->ident);
1379                 acpi_skip_timer_override = 1;
1380         }
1381         return 0;
1382 }
1383
1384 /*
1385  * If your system is blacklisted here, but you find that acpi=force
1386  * works for you, please contact linux-acpi@vger.kernel.org
1387  */
1388 static struct dmi_system_id __initdata acpi_dmi_table[] = {
1389         /*
1390          * Boxes that need ACPI disabled
1391          */
1392         {
1393          .callback = dmi_disable_acpi,
1394          .ident = "IBM Thinkpad",
1395          .matches = {
1396                      DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1397                      DMI_MATCH(DMI_BOARD_NAME, "2629H1G"),
1398                      },
1399          },
1400
1401         /*
1402          * Boxes that need ACPI PCI IRQ routing disabled
1403          */
1404         {
1405          .callback = disable_acpi_irq,
1406          .ident = "ASUS A7V",
1407          .matches = {
1408                      DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC"),
1409                      DMI_MATCH(DMI_BOARD_NAME, "<A7V>"),
1410                      /* newer BIOS, Revision 1011, does work */
1411                      DMI_MATCH(DMI_BIOS_VERSION,
1412                                "ASUS A7V ACPI BIOS Revision 1007"),
1413                      },
1414          },
1415         {
1416                 /*
1417                  * Latest BIOS for IBM 600E (1.16) has bad pcinum
1418                  * for LPC bridge, which is needed for the PCI
1419                  * interrupt links to work. DSDT fix is in bug 5966.
1420                  * 2645, 2646 model numbers are shared with 600/600E/600X
1421                  */
1422          .callback = disable_acpi_irq,
1423          .ident = "IBM Thinkpad 600 Series 2645",
1424          .matches = {
1425                      DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1426                      DMI_MATCH(DMI_BOARD_NAME, "2645"),
1427                      },
1428          },
1429         {
1430          .callback = disable_acpi_irq,
1431          .ident = "IBM Thinkpad 600 Series 2646",
1432          .matches = {
1433                      DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1434                      DMI_MATCH(DMI_BOARD_NAME, "2646"),
1435                      },
1436          },
1437         /*
1438          * Boxes that need ACPI PCI IRQ routing and PCI scan disabled
1439          */
1440         {                       /* _BBN 0 bug */
1441          .callback = disable_acpi_pci,
1442          .ident = "ASUS PR-DLS",
1443          .matches = {
1444                      DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1445                      DMI_MATCH(DMI_BOARD_NAME, "PR-DLS"),
1446                      DMI_MATCH(DMI_BIOS_VERSION,
1447                                "ASUS PR-DLS ACPI BIOS Revision 1010"),
1448                      DMI_MATCH(DMI_BIOS_DATE, "03/21/2003")
1449                      },
1450          },
1451         {
1452          .callback = disable_acpi_pci,
1453          .ident = "Acer TravelMate 36x Laptop",
1454          .matches = {
1455                      DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
1456                      DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"),
1457                      },
1458          },
1459         {}
1460 };
1461
1462 /* second table for DMI checks that should run after early-quirks */
1463 static struct dmi_system_id __initdata acpi_dmi_table_late[] = {
1464         /*
1465          * HP laptops which use a DSDT reporting as HP/SB400/10000,
1466          * which includes some code which overrides all temperature
1467          * trip points to 16C if the INTIN2 input of the I/O APIC
1468          * is enabled.  This input is incorrectly designated the
1469          * ISA IRQ 0 via an interrupt source override even though
1470          * it is wired to the output of the master 8259A and INTIN0
1471          * is not connected at all.  Force ignoring BIOS IRQ0 pin2
1472          * override in that cases.
1473          */
1474         {
1475          .callback = dmi_ignore_irq0_timer_override,
1476          .ident = "HP nx6115 laptop",
1477          .matches = {
1478                      DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1479                      DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6115"),
1480                      },
1481          },
1482         {
1483          .callback = dmi_ignore_irq0_timer_override,
1484          .ident = "HP NX6125 laptop",
1485          .matches = {
1486                      DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1487                      DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6125"),
1488                      },
1489          },
1490         {
1491          .callback = dmi_ignore_irq0_timer_override,
1492          .ident = "HP NX6325 laptop",
1493          .matches = {
1494                      DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1495                      DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6325"),
1496                      },
1497          },
1498         {
1499          .callback = dmi_ignore_irq0_timer_override,
1500          .ident = "HP 6715b laptop",
1501          .matches = {
1502                      DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1503                      DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq 6715b"),
1504                      },
1505          },
1506         {}
1507 };
1508
1509 /*
1510  * acpi_boot_table_init() and acpi_boot_init()
1511  *  called from setup_arch(), always.
1512  *      1. checksums all tables
1513  *      2. enumerates lapics
1514  *      3. enumerates io-apics
1515  *
1516  * acpi_table_init() is separate to allow reading SRAT without
1517  * other side effects.
1518  *
1519  * side effects of acpi_boot_init:
1520  *      acpi_lapic = 1 if LAPIC found
1521  *      acpi_ioapic = 1 if IOAPIC found
1522  *      if (acpi_lapic && acpi_ioapic) smp_found_config = 1;
1523  *      if acpi_blacklisted() acpi_disabled = 1;
1524  *      acpi_irq_model=...
1525  *      ...
1526  */
1527
1528 void __init acpi_boot_table_init(void)
1529 {
1530         dmi_check_system(acpi_dmi_table);
1531
1532         /*
1533          * If acpi_disabled, bail out
1534          */
1535         if (acpi_disabled)
1536                 return;
1537
1538         /*
1539          * Initialize the ACPI boot-time table parser.
1540          */
1541         if (acpi_table_init()) {
1542                 disable_acpi();
1543                 return;
1544         }
1545
1546         acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1547
1548         /*
1549          * blacklist may disable ACPI entirely
1550          */
1551         if (acpi_blacklisted()) {
1552                 if (acpi_force) {
1553                         printk(KERN_WARNING PREFIX "acpi=force override\n");
1554                 } else {
1555                         printk(KERN_WARNING PREFIX "Disabling ACPI support\n");
1556                         disable_acpi();
1557                         return;
1558                 }
1559         }
1560 }
1561
1562 int __init early_acpi_boot_init(void)
1563 {
1564         /*
1565          * If acpi_disabled, bail out
1566          */
1567         if (acpi_disabled)
1568                 return 1;
1569
1570         /*
1571          * Process the Multiple APIC Description Table (MADT), if present
1572          */
1573         early_acpi_process_madt();
1574
1575         return 0;
1576 }
1577
1578 int __init acpi_boot_init(void)
1579 {
1580         /* those are executed after early-quirks are executed */
1581         dmi_check_system(acpi_dmi_table_late);
1582
1583         /*
1584          * If acpi_disabled, bail out
1585          */
1586         if (acpi_disabled)
1587                 return 1;
1588
1589         acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1590
1591         /*
1592          * set sci_int and PM timer address
1593          */
1594         acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt);
1595
1596         /*
1597          * Process the Multiple APIC Description Table (MADT), if present
1598          */
1599         acpi_process_madt();
1600
1601         acpi_table_parse(ACPI_SIG_HPET, acpi_parse_hpet);
1602
1603         if (!acpi_noirq)
1604                 x86_init.pci.init = pci_acpi_init;
1605
1606         return 0;
1607 }
1608
1609 static int __init parse_acpi(char *arg)
1610 {
1611         if (!arg)
1612                 return -EINVAL;
1613
1614         /* "acpi=off" disables both ACPI table parsing and interpreter */
1615         if (strcmp(arg, "off") == 0) {
1616                 disable_acpi();
1617         }
1618         /* acpi=force to over-ride black-list */
1619         else if (strcmp(arg, "force") == 0) {
1620                 acpi_force = 1;
1621                 acpi_disabled = 0;
1622         }
1623         /* acpi=strict disables out-of-spec workarounds */
1624         else if (strcmp(arg, "strict") == 0) {
1625                 acpi_strict = 1;
1626         }
1627         /* acpi=rsdt use RSDT instead of XSDT */
1628         else if (strcmp(arg, "rsdt") == 0) {
1629                 acpi_rsdt_forced = 1;
1630         }
1631         /* "acpi=noirq" disables ACPI interrupt routing */
1632         else if (strcmp(arg, "noirq") == 0) {
1633                 acpi_noirq_set();
1634         }
1635         /* "acpi=copy_dsdt" copys DSDT */
1636         else if (strcmp(arg, "copy_dsdt") == 0) {
1637                 acpi_gbl_copy_dsdt_locally = 1;
1638         } else {
1639                 /* Core will printk when we return error. */
1640                 return -EINVAL;
1641         }
1642         return 0;
1643 }
1644 early_param("acpi", parse_acpi);
1645
1646 /* FIXME: Using pci= for an ACPI parameter is a travesty. */
1647 static int __init parse_pci(char *arg)
1648 {
1649         if (arg && strcmp(arg, "noacpi") == 0)
1650                 acpi_disable_pci();
1651         return 0;
1652 }
1653 early_param("pci", parse_pci);
1654
1655 int __init acpi_mps_check(void)
1656 {
1657 #if defined(CONFIG_X86_LOCAL_APIC) && !defined(CONFIG_X86_MPPARSE)
1658 /* mptable code is not built-in*/
1659         if (acpi_disabled || acpi_noirq) {
1660                 printk(KERN_WARNING "MPS support code is not built-in.\n"
1661                        "Using acpi=off or acpi=noirq or pci=noacpi "
1662                        "may have problem\n");
1663                 return 1;
1664         }
1665 #endif
1666         return 0;
1667 }
1668
1669 #ifdef CONFIG_X86_IO_APIC
1670 static int __init parse_acpi_skip_timer_override(char *arg)
1671 {
1672         acpi_skip_timer_override = 1;
1673         return 0;
1674 }
1675 early_param("acpi_skip_timer_override", parse_acpi_skip_timer_override);
1676
1677 static int __init parse_acpi_use_timer_override(char *arg)
1678 {
1679         acpi_use_timer_override = 1;
1680         return 0;
1681 }
1682 early_param("acpi_use_timer_override", parse_acpi_use_timer_override);
1683 #endif /* CONFIG_X86_IO_APIC */
1684
1685 static int __init setup_acpi_sci(char *s)
1686 {
1687         if (!s)
1688                 return -EINVAL;
1689         if (!strcmp(s, "edge"))
1690                 acpi_sci_flags =  ACPI_MADT_TRIGGER_EDGE |
1691                         (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1692         else if (!strcmp(s, "level"))
1693                 acpi_sci_flags = ACPI_MADT_TRIGGER_LEVEL |
1694                         (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1695         else if (!strcmp(s, "high"))
1696                 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_HIGH |
1697                         (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1698         else if (!strcmp(s, "low"))
1699                 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_LOW |
1700                         (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1701         else
1702                 return -EINVAL;
1703         return 0;
1704 }
1705 early_param("acpi_sci", setup_acpi_sci);
1706
1707 int __acpi_acquire_global_lock(unsigned int *lock)
1708 {
1709         unsigned int old, new, val;
1710         do {
1711                 old = *lock;
1712                 new = (((old & ~0x3) + 2) + ((old >> 1) & 0x1));
1713                 val = cmpxchg(lock, old, new);
1714         } while (unlikely (val != old));
1715         return (new < 3) ? -1 : 0;
1716 }
1717
1718 int __acpi_release_global_lock(unsigned int *lock)
1719 {
1720         unsigned int old, new, val;
1721         do {
1722                 old = *lock;
1723                 new = old & ~0x3;
1724                 val = cmpxchg(lock, old, new);
1725         } while (unlikely (val != old));
1726         return old & 0x1;
1727 }