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 int acpi_ht __initdata = 1;     /* enable HT */
  67
  68 int acpi_lapic;
  69 int acpi_ioapic;
  70 int acpi_strict;
  71
  72 u8 acpi_sci_flags __initdata;
  73 int acpi_sci_override_gsi __initdata;
  74 int acpi_skip_timer_override __initdata;
  75 int acpi_use_timer_override __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  * Temporarily use the virtual area starting from FIX_IO_APIC_BASE_END,
  98  * to map the target physical address. The problem is that set_fixmap()
  99  * provides a single page, and it is possible that the page is not
 100  * sufficient.
 101  * By using this area, we can map up to MAX_IO_APICS pages temporarily,
 102  * i.e. until the next __va_range() call.
 103  *
 104  * Important Safety Note:  The fixed I/O APIC page numbers are *subtracted*
 105  * from the fixed base.  That's why we start at FIX_IO_APIC_BASE_END and
 106  * count idx down while incrementing the phys address.
 107  */
 108 char *__init __acpi_map_table(unsigned long phys, unsigned long size)
 109 {
 110
 111         if (!phys || !size)
 112                 return NULL;
 113
 114         return early_ioremap(phys, size);
 115 }
 116 void __init __acpi_unmap_table(char *map, unsigned long size)
 117 {
 118         if (!map || !size)
 119                 return;
 120
 121         early_iounmap(map, size);
 122 }
 123
 124 #ifdef CONFIG_X86_LOCAL_APIC
 125 static int __init acpi_parse_madt(struct acpi_table_header *table)
 126 {
 127         struct acpi_table_madt *madt = NULL;
 128
 129         if (!cpu_has_apic)
 130                 return -EINVAL;
 131
 132         madt = (struct acpi_table_madt *)table;
 133         if (!madt) {
 134                 printk(KERN_WARNING PREFIX "Unable to map MADT\n");
 135                 return -ENODEV;
 136         }
 137
 138         if (madt->address) {
 139                 acpi_lapic_addr = (u64) madt->address;
 140
 141                 printk(KERN_DEBUG PREFIX "Local APIC address 0x%08x\n",
 142                        madt->address);
 143         }
 144
 145         default_acpi_madt_oem_check(madt->header.oem_id,
 146                                     madt->header.oem_table_id);
 147
 148         return 0;
 149 }
 150
 151 static void __cpuinit acpi_register_lapic(int id, u8 enabled)
 152 {
 153         unsigned int ver = 0;
 154
 155         if (!enabled) {
 156                 ++disabled_cpus;
 157                 return;
 158         }
 159
 160         if (boot_cpu_physical_apicid != -1U)
 161                 ver = apic_version[boot_cpu_physical_apicid];
 162
 163         generic_processor_info(id, ver);
 164 }
 165
 166 static int __init
 167 acpi_parse_x2apic(struct acpi_subtable_header *header, const unsigned long end)
 168 {
 169         struct acpi_madt_local_x2apic *processor = NULL;
 170
 171         processor = (struct acpi_madt_local_x2apic *)header;
 172
 173         if (BAD_MADT_ENTRY(processor, end))
 174                 return -EINVAL;
 175
 176         acpi_table_print_madt_entry(header);
 177
 178 #ifdef CONFIG_X86_X2APIC
 179         /*
 180          * We need to register disabled CPU as well to permit
 181          * counting disabled CPUs. This allows us to size
 182          * cpus_possible_map more accurately, to permit
 183          * to not preallocating memory for all NR_CPUS
 184          * when we use CPU hotplug.
 185          */
 186         acpi_register_lapic(processor->local_apic_id,   /* APIC ID */
 187                             processor->lapic_flags & ACPI_MADT_ENABLED);
 188 #else
 189         printk(KERN_WARNING PREFIX "x2apic entry ignored\n");
 190 #endif
 191
 192         return 0;
 193 }
 194
 195 static int __init
 196 acpi_parse_lapic(struct acpi_subtable_header * header, const unsigned long end)
 197 {
 198         struct acpi_madt_local_apic *processor = NULL;
 199
 200         processor = (struct acpi_madt_local_apic *)header;
 201
 202         if (BAD_MADT_ENTRY(processor, end))
 203                 return -EINVAL;
 204
 205         acpi_table_print_madt_entry(header);
 206
 207         /*
 208          * We need to register disabled CPU as well to permit
 209          * counting disabled CPUs. This allows us to size
 210          * cpus_possible_map more accurately, to permit
 211          * to not preallocating memory for all NR_CPUS
 212          * when we use CPU hotplug.
 213          */
 214         acpi_register_lapic(processor->id,      /* APIC ID */
 215                             processor->lapic_flags & ACPI_MADT_ENABLED);
 216
 217         return 0;
 218 }
 219
 220 static int __init
 221 acpi_parse_sapic(struct acpi_subtable_header *header, const unsigned long end)
 222 {
 223         struct acpi_madt_local_sapic *processor = NULL;
 224
 225         processor = (struct acpi_madt_local_sapic *)header;
 226
 227         if (BAD_MADT_ENTRY(processor, end))
 228                 return -EINVAL;
 229
 230         acpi_table_print_madt_entry(header);
 231
 232         acpi_register_lapic((processor->id << 8) | processor->eid,/* APIC ID */
 233                             processor->lapic_flags & ACPI_MADT_ENABLED);
 234
 235         return 0;
 236 }
 237
 238 static int __init
 239 acpi_parse_lapic_addr_ovr(struct acpi_subtable_header * header,
 240                           const unsigned long end)
 241 {
 242         struct acpi_madt_local_apic_override *lapic_addr_ovr = NULL;
 243
 244         lapic_addr_ovr = (struct acpi_madt_local_apic_override *)header;
 245
 246         if (BAD_MADT_ENTRY(lapic_addr_ovr, end))
 247                 return -EINVAL;
 248
 249         acpi_lapic_addr = lapic_addr_ovr->address;
 250
 251         return 0;
 252 }
 253
 254 static int __init
 255 acpi_parse_x2apic_nmi(struct acpi_subtable_header *header,
 256                       const unsigned long end)
 257 {
 258         struct acpi_madt_local_x2apic_nmi *x2apic_nmi = NULL;
 259
 260         x2apic_nmi = (struct acpi_madt_local_x2apic_nmi *)header;
 261
 262         if (BAD_MADT_ENTRY(x2apic_nmi, end))
 263                 return -EINVAL;
 264
 265         acpi_table_print_madt_entry(header);
 266
 267         if (x2apic_nmi->lint != 1)
 268                 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n");
 269
 270         return 0;
 271 }
 272
 273 static int __init
 274 acpi_parse_lapic_nmi(struct acpi_subtable_header * header, const unsigned long end)
 275 {
 276         struct acpi_madt_local_apic_nmi *lapic_nmi = NULL;
 277
 278         lapic_nmi = (struct acpi_madt_local_apic_nmi *)header;
 279
 280         if (BAD_MADT_ENTRY(lapic_nmi, end))
 281                 return -EINVAL;
 282
 283         acpi_table_print_madt_entry(header);
 284
 285         if (lapic_nmi->lint != 1)
 286                 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n");
 287
 288         return 0;
 289 }
 290
 291 #endif                          /*CONFIG_X86_LOCAL_APIC */
 292
 293 #ifdef CONFIG_X86_IO_APIC
 294
 295 static int __init
 296 acpi_parse_ioapic(struct acpi_subtable_header * header, const unsigned long end)
 297 {
 298         struct acpi_madt_io_apic *ioapic = NULL;
 299
 300         ioapic = (struct acpi_madt_io_apic *)header;
 301
 302         if (BAD_MADT_ENTRY(ioapic, end))
 303                 return -EINVAL;
 304
 305         acpi_table_print_madt_entry(header);
 306
 307         mp_register_ioapic(ioapic->id,
 308                            ioapic->address, ioapic->global_irq_base);
 309
 310         return 0;
 311 }
 312
 313 /*
 314  * Parse Interrupt Source Override for the ACPI SCI
 315  */
 316 static void __init acpi_sci_ioapic_setup(u8 bus_irq, u16 polarity, u16 trigger, u32 gsi)
 317 {
 318         if (trigger == 0)       /* compatible SCI trigger is level */
 319                 trigger = 3;
 320
 321         if (polarity == 0)      /* compatible SCI polarity is low */
 322                 polarity = 3;
 323
 324         /* Command-line over-ride via acpi_sci= */
 325         if (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK)
 326                 trigger = (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2;
 327
 328         if (acpi_sci_flags & ACPI_MADT_POLARITY_MASK)
 329                 polarity = acpi_sci_flags & ACPI_MADT_POLARITY_MASK;
 330
 331         /*
 332          * mp_config_acpi_legacy_irqs() already setup IRQs < 16
 333          * If GSI is < 16, this will update its flags,
 334          * else it will create a new mp_irqs[] entry.
 335          */
 336         mp_override_legacy_irq(bus_irq, polarity, trigger, gsi);
 337
 338         /*
 339          * stash over-ride to indicate we've been here
 340          * and for later update of acpi_gbl_FADT
 341          */
 342         acpi_sci_override_gsi = gsi;
 343         return;
 344 }
 345
 346 static int __init
 347 acpi_parse_int_src_ovr(struct acpi_subtable_header * header,
 348                        const unsigned long end)
 349 {
 350         struct acpi_madt_interrupt_override *intsrc = NULL;
 351
 352         intsrc = (struct acpi_madt_interrupt_override *)header;
 353
 354         if (BAD_MADT_ENTRY(intsrc, end))
 355                 return -EINVAL;
 356
 357         acpi_table_print_madt_entry(header);
 358
 359         if (intsrc->source_irq == acpi_gbl_FADT.sci_interrupt) {
 360                 acpi_sci_ioapic_setup(intsrc->source_irq,
 361                                       intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
 362                                       (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2,
 363                                       intsrc->global_irq);
 364                 return 0;
 365         }
 366
 367         if (acpi_skip_timer_override &&
 368             intsrc->source_irq == 0 && intsrc->global_irq == 2) {
 369                 printk(PREFIX "BIOS IRQ0 pin2 override ignored.\n");
 370                 return 0;
 371         }
 372
 373         mp_override_legacy_irq(intsrc->source_irq,
 374                                 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
 375                                 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2,
 376                                 intsrc->global_irq);
 377
 378         return 0;
 379 }
 380
 381 static int __init
 382 acpi_parse_nmi_src(struct acpi_subtable_header * header, const unsigned long end)
 383 {
 384         struct acpi_madt_nmi_source *nmi_src = NULL;
 385
 386         nmi_src = (struct acpi_madt_nmi_source *)header;
 387
 388         if (BAD_MADT_ENTRY(nmi_src, end))
 389                 return -EINVAL;
 390
 391         acpi_table_print_madt_entry(header);
 392
 393         /* TBD: Support nimsrc entries? */
 394
 395         return 0;
 396 }
 397
 398 #endif                          /* CONFIG_X86_IO_APIC */
 399
 400 /*
 401  * acpi_pic_sci_set_trigger()
 402  *
 403  * use ELCR to set PIC-mode trigger type for SCI
 404  *
 405  * If a PIC-mode SCI is not recognized or gives spurious IRQ7's
 406  * it may require Edge Trigger -- use "acpi_sci=edge"
 407  *
 408  * Port 0x4d0-4d1 are ECLR1 and ECLR2, the Edge/Level Control Registers
 409  * for the 8259 PIC.  bit[n] = 1 means irq[n] is Level, otherwise Edge.
 410  * ECLR1 is IRQs 0-7 (IRQ 0, 1, 2 must be 0)
 411  * ECLR2 is IRQs 8-15 (IRQ 8, 13 must be 0)
 412  */
 413
 414 void __init acpi_pic_sci_set_trigger(unsigned int irq, u16 trigger)
 415 {
 416         unsigned int mask = 1 << irq;
 417         unsigned int old, new;
 418
 419         /* Real old ELCR mask */
 420         old = inb(0x4d0) | (inb(0x4d1) << 8);
 421
 422         /*
 423          * If we use ACPI to set PCI IRQs, then we should clear ELCR
 424          * since we will set it correctly as we enable the PCI irq
 425          * routing.
 426          */
 427         new = acpi_noirq ? old : 0;
 428
 429         /*
 430          * Update SCI information in the ELCR, it isn't in the PCI
 431          * routing tables..
 432          */
 433         switch (trigger) {
 434         case 1:         /* Edge - clear */
 435                 new &= ~mask;
 436                 break;
 437         case 3:         /* Level - set */
 438                 new |= mask;
 439                 break;
 440         }
 441
 442         if (old == new)
 443                 return;
 444
 445         printk(PREFIX "setting ELCR to %04x (from %04x)\n", new, old);
 446         outb(new, 0x4d0);
 447         outb(new >> 8, 0x4d1);
 448 }
 449
 450 int acpi_gsi_to_irq(u32 gsi, unsigned int *irq)
 451 {
 452         *irq = gsi;
 453
 454 #ifdef CONFIG_X86_IO_APIC
 455         if (acpi_irq_model == ACPI_IRQ_MODEL_IOAPIC)
 456                 setup_IO_APIC_irq_extra(gsi);
 457 #endif
 458
 459         return 0;
 460 }
 461
 462 int acpi_isa_irq_to_gsi(unsigned isa_irq, u32 *gsi)
 463 {
 464         if (isa_irq >= 16)
 465                 return -1;
 466         *gsi = isa_irq;
 467         return 0;
 468 }
 469
 470 /*
 471  * success: return IRQ number (>=0)
 472  * failure: return < 0
 473  */
 474 int acpi_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity)
 475 {
 476         unsigned int irq;
 477         unsigned int plat_gsi = gsi;
 478
 479 #ifdef CONFIG_PCI
 480         /*
 481          * Make sure all (legacy) PCI IRQs are set as level-triggered.
 482          */
 483         if (acpi_irq_model == ACPI_IRQ_MODEL_PIC) {
 484                 if (trigger == ACPI_LEVEL_SENSITIVE)
 485                         eisa_set_level_irq(gsi);
 486         }
 487 #endif
 488
 489 #ifdef CONFIG_X86_IO_APIC
 490         if (acpi_irq_model == ACPI_IRQ_MODEL_IOAPIC) {
 491                 plat_gsi = mp_register_gsi(dev, gsi, trigger, polarity);
 492         }
 493 #endif
 494         irq = plat_gsi;
 495
 496         return irq;
 497 }
 498
 499 /*
 500  *  ACPI based hotplug support for CPU
 501  */
 502 #ifdef CONFIG_ACPI_HOTPLUG_CPU
 503 #include <acpi/processor.h>
 504
 505 static void acpi_map_cpu2node(acpi_handle handle, int cpu, int physid)
 506 {
 507 #ifdef CONFIG_ACPI_NUMA
 508         int nid;
 509
 510         nid = acpi_get_node(handle);
 511         if (nid == -1 || !node_online(nid))
 512                 return;
 513 #ifdef CONFIG_X86_64
 514         apicid_to_node[physid] = nid;
 515         numa_set_node(cpu, nid);
 516 #else /* CONFIG_X86_32 */
 517         apicid_2_node[physid] = nid;
 518         cpu_to_node_map[cpu] = nid;
 519 #endif
 520
 521 #endif
 522 }
 523
 524 static int __cpuinit _acpi_map_lsapic(acpi_handle handle, int *pcpu)
 525 {
 526         struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
 527         union acpi_object *obj;
 528         struct acpi_madt_local_apic *lapic;
 529         cpumask_var_t tmp_map, new_map;
 530         u8 physid;
 531         int cpu;
 532         int retval = -ENOMEM;
 533
 534         if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer)))
 535                 return -EINVAL;
 536
 537         if (!buffer.length || !buffer.pointer)
 538                 return -EINVAL;
 539
 540         obj = buffer.pointer;
 541         if (obj->type != ACPI_TYPE_BUFFER ||
 542             obj->buffer.length < sizeof(*lapic)) {
 543                 kfree(buffer.pointer);
 544                 return -EINVAL;
 545         }
 546
 547         lapic = (struct acpi_madt_local_apic *)obj->buffer.pointer;
 548
 549         if (lapic->header.type != ACPI_MADT_TYPE_LOCAL_APIC ||
 550             !(lapic->lapic_flags & ACPI_MADT_ENABLED)) {
 551                 kfree(buffer.pointer);
 552                 return -EINVAL;
 553         }
 554
 555         physid = lapic->id;
 556
 557         kfree(buffer.pointer);
 558         buffer.length = ACPI_ALLOCATE_BUFFER;
 559         buffer.pointer = NULL;
 560
 561         if (!alloc_cpumask_var(&tmp_map, GFP_KERNEL))
 562                 goto out;
 563
 564         if (!alloc_cpumask_var(&new_map, GFP_KERNEL))
 565                 goto free_tmp_map;
 566
 567         cpumask_copy(tmp_map, cpu_present_mask);
 568         acpi_register_lapic(physid, lapic->lapic_flags & ACPI_MADT_ENABLED);
 569
 570         /*
 571          * If mp_register_lapic successfully generates a new logical cpu
 572          * number, then the following will get us exactly what was mapped
 573          */
 574         cpumask_andnot(new_map, cpu_present_mask, tmp_map);
 575         if (cpumask_empty(new_map)) {
 576                 printk ("Unable to map lapic to logical cpu number\n");
 577                 retval = -EINVAL;
 578                 goto free_new_map;
 579         }
 580
 581         acpi_processor_set_pdc(handle);
 582
 583         cpu = cpumask_first(new_map);
 584         acpi_map_cpu2node(handle, cpu, physid);
 585
 586         *pcpu = cpu;
 587         retval = 0;
 588
 589 free_new_map:
 590         free_cpumask_var(new_map);
 591 free_tmp_map:
 592         free_cpumask_var(tmp_map);
 593 out:
 594         return retval;
 595 }
 596
 597 /* wrapper to silence section mismatch warning */
 598 int __ref acpi_map_lsapic(acpi_handle handle, int *pcpu)
 599 {
 600         return _acpi_map_lsapic(handle, pcpu);
 601 }
 602 EXPORT_SYMBOL(acpi_map_lsapic);
 603
 604 int acpi_unmap_lsapic(int cpu)
 605 {
 606         per_cpu(x86_cpu_to_apicid, cpu) = -1;
 607         set_cpu_present(cpu, false);
 608         num_processors--;
 609
 610         return (0);
 611 }
 612
 613 EXPORT_SYMBOL(acpi_unmap_lsapic);
 614 #endif                          /* CONFIG_ACPI_HOTPLUG_CPU */
 615
 616 int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base)
 617 {
 618         /* TBD */
 619         return -EINVAL;
 620 }
 621
 622 EXPORT_SYMBOL(acpi_register_ioapic);
 623
 624 int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base)
 625 {
 626         /* TBD */
 627         return -EINVAL;
 628 }
 629
 630 EXPORT_SYMBOL(acpi_unregister_ioapic);
 631
 632 static int __init acpi_parse_sbf(struct acpi_table_header *table)
 633 {
 634         struct acpi_table_boot *sb;
 635
 636         sb = (struct acpi_table_boot *)table;
 637         if (!sb) {
 638                 printk(KERN_WARNING PREFIX "Unable to map SBF\n");
 639                 return -ENODEV;
 640         }
 641
 642         sbf_port = sb->cmos_index;      /* Save CMOS port */
 643
 644         return 0;
 645 }
 646
 647 #ifdef CONFIG_HPET_TIMER
 648 #include <asm/hpet.h>
 649
 650 static struct __initdata resource *hpet_res;
 651
 652 static int __init acpi_parse_hpet(struct acpi_table_header *table)
 653 {
 654         struct acpi_table_hpet *hpet_tbl;
 655
 656         hpet_tbl = (struct acpi_table_hpet *)table;
 657         if (!hpet_tbl) {
 658                 printk(KERN_WARNING PREFIX "Unable to map HPET\n");
 659                 return -ENODEV;
 660         }
 661
 662         if (hpet_tbl->address.space_id != ACPI_SPACE_MEM) {
 663                 printk(KERN_WARNING PREFIX "HPET timers must be located in "
 664                        "memory.\n");
 665                 return -1;
 666         }
 667
 668         hpet_address = hpet_tbl->address.address;
 669         hpet_blockid = hpet_tbl->sequence;
 670
 671         /*
 672          * Some broken BIOSes advertise HPET at 0x0. We really do not
 673          * want to allocate a resource there.
 674          */
 675         if (!hpet_address) {
 676                 printk(KERN_WARNING PREFIX
 677                        "HPET id: %#x base: %#lx is invalid\n",
 678                        hpet_tbl->id, hpet_address);
 679                 return 0;
 680         }
 681 #ifdef CONFIG_X86_64
 682         /*
 683          * Some even more broken BIOSes advertise HPET at
 684          * 0xfed0000000000000 instead of 0xfed00000. Fix it up and add
 685          * some noise:
 686          */
 687         if (hpet_address == 0xfed0000000000000UL) {
 688                 if (!hpet_force_user) {
 689                         printk(KERN_WARNING PREFIX "HPET id: %#x "
 690                                "base: 0xfed0000000000000 is bogus\n "
 691                                "try hpet=force on the kernel command line to "
 692                                "fix it up to 0xfed00000.\n", hpet_tbl->id);
 693                         hpet_address = 0;
 694                         return 0;
 695                 }
 696                 printk(KERN_WARNING PREFIX
 697                        "HPET id: %#x base: 0xfed0000000000000 fixed up "
 698                        "to 0xfed00000.\n", hpet_tbl->id);
 699                 hpet_address >>= 32;
 700         }
 701 #endif
 702         printk(KERN_INFO PREFIX "HPET id: %#x base: %#lx\n",
 703                hpet_tbl->id, hpet_address);
 704
 705         /*
 706          * Allocate and initialize the HPET firmware resource for adding into
 707          * the resource tree during the lateinit timeframe.
 708          */
 709 #define HPET_RESOURCE_NAME_SIZE 9
 710         hpet_res = alloc_bootmem(sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE);
 711
 712         hpet_res->name = (void *)&hpet_res[1];
 713         hpet_res->flags = IORESOURCE_MEM;
 714         snprintf((char *)hpet_res->name, HPET_RESOURCE_NAME_SIZE, "HPET %u",
 715                  hpet_tbl->sequence);
 716
 717         hpet_res->start = hpet_address;
 718         hpet_res->end = hpet_address + (1 * 1024) - 1;
 719
 720         return 0;
 721 }
 722
 723 /*
 724  * hpet_insert_resource inserts the HPET resources used into the resource
 725  * tree.
 726  */
 727 static __init int hpet_insert_resource(void)
 728 {
 729         if (!hpet_res)
 730                 return 1;
 731
 732         return insert_resource(&iomem_resource, hpet_res);
 733 }
 734
 735 late_initcall(hpet_insert_resource);
 736
 737 #else
 738 #define acpi_parse_hpet NULL
 739 #endif
 740
 741 static int __init acpi_parse_fadt(struct acpi_table_header *table)
 742 {
 743
 744 #ifdef CONFIG_X86_PM_TIMER
 745         /* detect the location of the ACPI PM Timer */
 746         if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID) {
 747                 /* FADT rev. 2 */
 748                 if (acpi_gbl_FADT.xpm_timer_block.space_id !=
 749                     ACPI_ADR_SPACE_SYSTEM_IO)
 750                         return 0;
 751
 752                 pmtmr_ioport = acpi_gbl_FADT.xpm_timer_block.address;
 753                 /*
 754                  * "X" fields are optional extensions to the original V1.0
 755                  * fields, so we must selectively expand V1.0 fields if the
 756                  * corresponding X field is zero.
 757                  */
 758                 if (!pmtmr_ioport)
 759                         pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
 760         } else {
 761                 /* FADT rev. 1 */
 762                 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
 763         }
 764         if (pmtmr_ioport)
 765                 printk(KERN_INFO PREFIX "PM-Timer IO Port: %#x\n",
 766                        pmtmr_ioport);
 767 #endif
 768         return 0;
 769 }
 770
 771 #ifdef  CONFIG_X86_LOCAL_APIC
 772 /*
 773  * Parse LAPIC entries in MADT
 774  * returns 0 on success, < 0 on error
 775  */
 776
 777 static void __init acpi_register_lapic_address(unsigned long address)
 778 {
 779         mp_lapic_addr = address;
 780
 781         set_fixmap_nocache(FIX_APIC_BASE, address);
 782         if (boot_cpu_physical_apicid == -1U) {
 783                 boot_cpu_physical_apicid  = read_apic_id();
 784                 apic_version[boot_cpu_physical_apicid] =
 785                          GET_APIC_VERSION(apic_read(APIC_LVR));
 786         }
 787 }
 788
 789 static int __init early_acpi_parse_madt_lapic_addr_ovr(void)
 790 {
 791         int count;
 792
 793         if (!cpu_has_apic)
 794                 return -ENODEV;
 795
 796         /*
 797          * Note that the LAPIC address is obtained from the MADT (32-bit value)
 798          * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value).
 799          */
 800
 801         count =
 802             acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
 803                                   acpi_parse_lapic_addr_ovr, 0);
 804         if (count < 0) {
 805                 printk(KERN_ERR PREFIX
 806                        "Error parsing LAPIC address override entry\n");
 807                 return count;
 808         }
 809
 810         acpi_register_lapic_address(acpi_lapic_addr);
 811
 812         return count;
 813 }
 814
 815 static int __init acpi_parse_madt_lapic_entries(void)
 816 {
 817         int count;
 818         int x2count = 0;
 819
 820         if (!cpu_has_apic)
 821                 return -ENODEV;
 822
 823         /*
 824          * Note that the LAPIC address is obtained from the MADT (32-bit value)
 825          * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value).
 826          */
 827
 828         count =
 829             acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
 830                                   acpi_parse_lapic_addr_ovr, 0);
 831         if (count < 0) {
 832                 printk(KERN_ERR PREFIX
 833                        "Error parsing LAPIC address override entry\n");
 834                 return count;
 835         }
 836
 837         acpi_register_lapic_address(acpi_lapic_addr);
 838
 839         count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC,
 840                                       acpi_parse_sapic, MAX_APICS);
 841
 842         if (!count) {
 843                 x2count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC,
 844                                                 acpi_parse_x2apic, MAX_APICS);
 845                 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC,
 846                                               acpi_parse_lapic, MAX_APICS);
 847         }
 848         if (!count && !x2count) {
 849                 printk(KERN_ERR PREFIX "No LAPIC entries present\n");
 850                 /* TBD: Cleanup to allow fallback to MPS */
 851                 return -ENODEV;
 852         } else if (count < 0 || x2count < 0) {
 853                 printk(KERN_ERR PREFIX "Error parsing LAPIC entry\n");
 854                 /* TBD: Cleanup to allow fallback to MPS */
 855                 return count;
 856         }
 857
 858         x2count =
 859             acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC_NMI,
 860                                   acpi_parse_x2apic_nmi, 0);
 861         count =
 862             acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI, acpi_parse_lapic_nmi, 0);
 863         if (count < 0 || x2count < 0) {
 864                 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n");
 865                 /* TBD: Cleanup to allow fallback to MPS */
 866                 return count;
 867         }
 868         return 0;
 869 }
 870 #endif                          /* CONFIG_X86_LOCAL_APIC */
 871
 872 #ifdef  CONFIG_X86_IO_APIC
 873 #define MP_ISA_BUS              0
 874
 875 #ifdef CONFIG_X86_ES7000
 876 extern int es7000_plat;
 877 #endif
 878
 879 int __init acpi_probe_gsi(void)
 880 {
 881         int idx;
 882         int gsi;
 883         int max_gsi = 0;
 884
 885         if (acpi_disabled)
 886                 return 0;
 887
 888         if (!acpi_ioapic)
 889                 return 0;
 890
 891         max_gsi = 0;
 892         for (idx = 0; idx < nr_ioapics; idx++) {
 893                 gsi = mp_gsi_routing[idx].gsi_end;
 894
 895                 if (gsi > max_gsi)
 896                         max_gsi = gsi;
 897         }
 898
 899         return max_gsi + 1;
 900 }
 901
 902 static void assign_to_mp_irq(struct mpc_intsrc *m,
 903                                     struct mpc_intsrc *mp_irq)
 904 {
 905         memcpy(mp_irq, m, sizeof(struct mpc_intsrc));
 906 }
 907
 908 static int mp_irq_cmp(struct mpc_intsrc *mp_irq,
 909                                 struct mpc_intsrc *m)
 910 {
 911         return memcmp(mp_irq, m, sizeof(struct mpc_intsrc));
 912 }
 913
 914 static void save_mp_irq(struct mpc_intsrc *m)
 915 {
 916         int i;
 917
 918         for (i = 0; i < mp_irq_entries; i++) {
 919                 if (!mp_irq_cmp(&mp_irqs[i], m))
 920                         return;
 921         }
 922
 923         assign_to_mp_irq(m, &mp_irqs[mp_irq_entries]);
 924         if (++mp_irq_entries == MAX_IRQ_SOURCES)
 925                 panic("Max # of irq sources exceeded!!\n");
 926 }
 927
 928 void __init mp_override_legacy_irq(u8 bus_irq, u8 polarity, u8 trigger, u32 gsi)
 929 {
 930         int ioapic;
 931         int pin;
 932         struct mpc_intsrc mp_irq;
 933
 934         /*
 935          * Convert 'gsi' to 'ioapic.pin'.
 936          */
 937         ioapic = mp_find_ioapic(gsi);
 938         if (ioapic < 0)
 939                 return;
 940         pin = mp_find_ioapic_pin(ioapic, gsi);
 941
 942         /*
 943          * TBD: This check is for faulty timer entries, where the override
 944          *      erroneously sets the trigger to level, resulting in a HUGE
 945          *      increase of timer interrupts!
 946          */
 947         if ((bus_irq == 0) && (trigger == 3))
 948                 trigger = 1;
 949
 950         mp_irq.type = MP_INTSRC;
 951         mp_irq.irqtype = mp_INT;
 952         mp_irq.irqflag = (trigger << 2) | polarity;
 953         mp_irq.srcbus = MP_ISA_BUS;
 954         mp_irq.srcbusirq = bus_irq;     /* IRQ */
 955         mp_irq.dstapic = mp_ioapics[ioapic].apicid; /* APIC ID */
 956         mp_irq.dstirq = pin;    /* INTIN# */
 957
 958         save_mp_irq(&mp_irq);
 959 }
 960
 961 void __init mp_config_acpi_legacy_irqs(void)
 962 {
 963         int i;
 964         int ioapic;
 965         unsigned int dstapic;
 966         struct mpc_intsrc mp_irq;
 967
 968 #if defined (CONFIG_MCA) || defined (CONFIG_EISA)
 969         /*
 970          * Fabricate the legacy ISA bus (bus #31).
 971          */
 972         mp_bus_id_to_type[MP_ISA_BUS] = MP_BUS_ISA;
 973 #endif
 974         set_bit(MP_ISA_BUS, mp_bus_not_pci);
 975         pr_debug("Bus #%d is ISA\n", MP_ISA_BUS);
 976
 977 #ifdef CONFIG_X86_ES7000
 978         /*
 979          * Older generations of ES7000 have no legacy identity mappings
 980          */
 981         if (es7000_plat == 1)
 982                 return;
 983 #endif
 984
 985         /*
 986          * Locate the IOAPIC that manages the ISA IRQs (0-15).
 987          */
 988         ioapic = mp_find_ioapic(0);
 989         if (ioapic < 0)
 990                 return;
 991         dstapic = mp_ioapics[ioapic].apicid;
 992
 993         /*
 994          * Use the default configuration for the IRQs 0-15.  Unless
 995          * overridden by (MADT) interrupt source override entries.
 996          */
 997         for (i = 0; i < 16; i++) {
 998                 int idx;
 999
1000                 for (idx = 0; idx < mp_irq_entries; idx++) {
1001                         struct mpc_intsrc *irq = mp_irqs + idx;
1002
1003                         /* Do we already have a mapping for this ISA IRQ? */
1004                         if (irq->srcbus == MP_ISA_BUS && irq->srcbusirq == i)
1005                                 break;
1006
1007                         /* Do we already have a mapping for this IOAPIC pin */
1008                         if (irq->dstapic == dstapic && irq->dstirq == i)
1009                                 break;
1010                 }
1011
1012                 if (idx != mp_irq_entries) {
1013                         printk(KERN_DEBUG "ACPI: IRQ%d used by override.\n", i);
1014                         continue;       /* IRQ already used */
1015                 }
1016
1017                 mp_irq.type = MP_INTSRC;
1018                 mp_irq.irqflag = 0;     /* Conforming */
1019                 mp_irq.srcbus = MP_ISA_BUS;
1020                 mp_irq.dstapic = dstapic;
1021                 mp_irq.irqtype = mp_INT;
1022                 mp_irq.srcbusirq = i; /* Identity mapped */
1023                 mp_irq.dstirq = i;
1024
1025                 save_mp_irq(&mp_irq);
1026         }
1027 }
1028
1029 static int mp_config_acpi_gsi(struct device *dev, u32 gsi, int trigger,
1030                         int polarity)
1031 {
1032 #ifdef CONFIG_X86_MPPARSE
1033         struct mpc_intsrc mp_irq;
1034         struct pci_dev *pdev;
1035         unsigned char number;
1036         unsigned int devfn;
1037         int ioapic;
1038         u8 pin;
1039
1040         if (!acpi_ioapic)
1041                 return 0;
1042         if (!dev)
1043                 return 0;
1044         if (dev->bus != &pci_bus_type)
1045                 return 0;
1046
1047         pdev = to_pci_dev(dev);
1048         number = pdev->bus->number;
1049         devfn = pdev->devfn;
1050         pin = pdev->pin;
1051         /* print the entry should happen on mptable identically */
1052         mp_irq.type = MP_INTSRC;
1053         mp_irq.irqtype = mp_INT;
1054         mp_irq.irqflag = (trigger == ACPI_EDGE_SENSITIVE ? 4 : 0x0c) |
1055                                 (polarity == ACPI_ACTIVE_HIGH ? 1 : 3);
1056         mp_irq.srcbus = number;
1057         mp_irq.srcbusirq = (((devfn >> 3) & 0x1f) << 2) | ((pin - 1) & 3);
1058         ioapic = mp_find_ioapic(gsi);
1059         mp_irq.dstapic = mp_ioapics[ioapic].apicid;
1060         mp_irq.dstirq = mp_find_ioapic_pin(ioapic, gsi);
1061
1062         save_mp_irq(&mp_irq);
1063 #endif
1064         return 0;
1065 }
1066
1067 int mp_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity)
1068 {
1069         int ioapic;
1070         int ioapic_pin;
1071         struct io_apic_irq_attr irq_attr;
1072
1073         if (acpi_irq_model != ACPI_IRQ_MODEL_IOAPIC)
1074                 return gsi;
1075
1076         /* Don't set up the ACPI SCI because it's already set up */
1077         if (acpi_gbl_FADT.sci_interrupt == gsi)
1078                 return gsi;
1079
1080         ioapic = mp_find_ioapic(gsi);
1081         if (ioapic < 0) {
1082                 printk(KERN_WARNING "No IOAPIC for GSI %u\n", gsi);
1083                 return gsi;
1084         }
1085
1086         ioapic_pin = mp_find_ioapic_pin(ioapic, gsi);
1087
1088 #ifdef CONFIG_X86_32
1089         if (ioapic_renumber_irq)
1090                 gsi = ioapic_renumber_irq(ioapic, gsi);
1091 #endif
1092
1093         if (ioapic_pin > MP_MAX_IOAPIC_PIN) {
1094                 printk(KERN_ERR "Invalid reference to IOAPIC pin "
1095                        "%d-%d\n", mp_ioapics[ioapic].apicid,
1096                        ioapic_pin);
1097                 return gsi;
1098         }
1099
1100         if (enable_update_mptable)
1101                 mp_config_acpi_gsi(dev, gsi, trigger, polarity);
1102
1103         set_io_apic_irq_attr(&irq_attr, ioapic, ioapic_pin,
1104                              trigger == ACPI_EDGE_SENSITIVE ? 0 : 1,
1105                              polarity == ACPI_ACTIVE_HIGH ? 0 : 1);
1106         io_apic_set_pci_routing(dev, gsi, &irq_attr);
1107
1108         return gsi;
1109 }
1110
1111 /*
1112  * Parse IOAPIC related entries in MADT
1113  * returns 0 on success, < 0 on error
1114  */
1115 static int __init acpi_parse_madt_ioapic_entries(void)
1116 {
1117         int count;
1118
1119         /*
1120          * ACPI interpreter is required to complete interrupt setup,
1121          * so if it is off, don't enumerate the io-apics with ACPI.
1122          * If MPS is present, it will handle them,
1123          * otherwise the system will stay in PIC mode
1124          */
1125         if (acpi_disabled || acpi_noirq)
1126                 return -ENODEV;
1127
1128         if (!cpu_has_apic)
1129                 return -ENODEV;
1130
1131         /*
1132          * if "noapic" boot option, don't look for IO-APICs
1133          */
1134         if (skip_ioapic_setup) {
1135                 printk(KERN_INFO PREFIX "Skipping IOAPIC probe "
1136                        "due to 'noapic' option.\n");
1137                 return -ENODEV;
1138         }
1139
1140         count =
1141             acpi_table_parse_madt(ACPI_MADT_TYPE_IO_APIC, acpi_parse_ioapic,
1142                                   MAX_IO_APICS);
1143         if (!count) {
1144                 printk(KERN_ERR PREFIX "No IOAPIC entries present\n");
1145                 return -ENODEV;
1146         } else if (count < 0) {
1147                 printk(KERN_ERR PREFIX "Error parsing IOAPIC entry\n");
1148                 return count;
1149         }
1150
1151         count =
1152             acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE, acpi_parse_int_src_ovr,
1153                                   nr_irqs);
1154         if (count < 0) {
1155                 printk(KERN_ERR PREFIX
1156                        "Error parsing interrupt source overrides entry\n");
1157                 /* TBD: Cleanup to allow fallback to MPS */
1158                 return count;
1159         }
1160
1161         /*
1162          * If BIOS did not supply an INT_SRC_OVR for the SCI
1163          * pretend we got one so we can set the SCI flags.
1164          */
1165         if (!acpi_sci_override_gsi)
1166                 acpi_sci_ioapic_setup(acpi_gbl_FADT.sci_interrupt, 0, 0,
1167                                       acpi_gbl_FADT.sci_interrupt);
1168
1169         /* Fill in identity legacy mappings where no override */
1170         mp_config_acpi_legacy_irqs();
1171
1172         count =
1173             acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE, acpi_parse_nmi_src,
1174                                   nr_irqs);
1175         if (count < 0) {
1176                 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n");
1177                 /* TBD: Cleanup to allow fallback to MPS */
1178                 return count;
1179         }
1180
1181         return 0;
1182 }
1183 #else
1184 static inline int acpi_parse_madt_ioapic_entries(void)
1185 {
1186         return -1;
1187 }
1188 #endif  /* !CONFIG_X86_IO_APIC */
1189
1190 static void __init early_acpi_process_madt(void)
1191 {
1192 #ifdef CONFIG_X86_LOCAL_APIC
1193         int error;
1194
1195         if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1196
1197                 /*
1198                  * Parse MADT LAPIC entries
1199                  */
1200                 error = early_acpi_parse_madt_lapic_addr_ovr();
1201                 if (!error) {
1202                         acpi_lapic = 1;
1203                         smp_found_config = 1;
1204                 }
1205                 if (error == -EINVAL) {
1206                         /*
1207                          * Dell Precision Workstation 410, 610 come here.
1208                          */
1209                         printk(KERN_ERR PREFIX
1210                                "Invalid BIOS MADT, disabling ACPI\n");
1211                         disable_acpi();
1212                 }
1213         }
1214 #endif
1215 }
1216
1217 static void __init acpi_process_madt(void)
1218 {
1219 #ifdef CONFIG_X86_LOCAL_APIC
1220         int error;
1221
1222         if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1223
1224                 /*
1225                  * Parse MADT LAPIC entries
1226                  */
1227                 error = acpi_parse_madt_lapic_entries();
1228                 if (!error) {
1229                         acpi_lapic = 1;
1230
1231                         /*
1232                          * Parse MADT IO-APIC entries
1233                          */
1234                         error = acpi_parse_madt_ioapic_entries();
1235                         if (!error) {
1236                                 acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC;
1237                                 acpi_ioapic = 1;
1238
1239                                 smp_found_config = 1;
1240                         }
1241                 }
1242                 if (error == -EINVAL) {
1243                         /*
1244                          * Dell Precision Workstation 410, 610 come here.
1245                          */
1246                         printk(KERN_ERR PREFIX
1247                                "Invalid BIOS MADT, disabling ACPI\n");
1248                         disable_acpi();
1249                 }
1250         } else {
1251                 /*
1252                  * ACPI found no MADT, and so ACPI wants UP PIC mode.
1253                  * In the event an MPS table was found, forget it.
1254                  * Boot with "acpi=off" to use MPS on such a system.
1255                  */
1256                 if (smp_found_config) {
1257                         printk(KERN_WARNING PREFIX
1258                                 "No APIC-table, disabling MPS\n");
1259                         smp_found_config = 0;
1260                 }
1261         }
1262
1263         /*
1264          * ACPI supports both logical (e.g. Hyper-Threading) and physical
1265          * processors, where MPS only supports physical.
1266          */
1267         if (acpi_lapic && acpi_ioapic)
1268                 printk(KERN_INFO "Using ACPI (MADT) for SMP configuration "
1269                        "information\n");
1270         else if (acpi_lapic)
1271                 printk(KERN_INFO "Using ACPI for processor (LAPIC) "
1272                        "configuration information\n");
1273 #endif
1274         return;
1275 }
1276
1277 static int __init disable_acpi_irq(const struct dmi_system_id *d)
1278 {
1279         if (!acpi_force) {
1280                 printk(KERN_NOTICE "%s detected: force use of acpi=noirq\n",
1281                        d->ident);
1282                 acpi_noirq_set();
1283         }
1284         return 0;
1285 }
1286
1287 static int __init disable_acpi_pci(const struct dmi_system_id *d)
1288 {
1289         if (!acpi_force) {
1290                 printk(KERN_NOTICE "%s detected: force use of pci=noacpi\n",
1291                        d->ident);
1292                 acpi_disable_pci();
1293         }
1294         return 0;
1295 }
1296
1297 static int __init dmi_disable_acpi(const struct dmi_system_id *d)
1298 {
1299         if (!acpi_force) {
1300                 printk(KERN_NOTICE "%s detected: acpi off\n", d->ident);
1301                 disable_acpi();
1302         } else {
1303                 printk(KERN_NOTICE
1304                        "Warning: DMI blacklist says broken, but acpi forced\n");
1305         }
1306         return 0;
1307 }
1308
1309 /*
1310  * Force ignoring BIOS IRQ0 pin2 override
1311  */
1312 static int __init dmi_ignore_irq0_timer_override(const struct dmi_system_id *d)
1313 {
1314         /*
1315          * The ati_ixp4x0_rev() early PCI quirk should have set
1316          * the acpi_skip_timer_override flag already:
1317          */
1318         if (!acpi_skip_timer_override) {
1319                 WARN(1, KERN_ERR "ati_ixp4x0 quirk not complete.\n");
1320                 pr_notice("%s detected: Ignoring BIOS IRQ0 pin2 override\n",
1321                         d->ident);
1322                 acpi_skip_timer_override = 1;
1323         }
1324         return 0;
1325 }
1326
1327 /*
1328  * If your system is blacklisted here, but you find that acpi=force
1329  * works for you, please contact linux-acpi@vger.kernel.org
1330  */
1331 static struct dmi_system_id __initdata acpi_dmi_table[] = {
1332         /*
1333          * Boxes that need ACPI disabled
1334          */
1335         {
1336          .callback = dmi_disable_acpi,
1337          .ident = "IBM Thinkpad",
1338          .matches = {
1339                      DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1340                      DMI_MATCH(DMI_BOARD_NAME, "2629H1G"),
1341                      },
1342          },
1343
1344         /*
1345          * Boxes that need ACPI PCI IRQ routing disabled
1346          */
1347         {
1348          .callback = disable_acpi_irq,
1349          .ident = "ASUS A7V",
1350          .matches = {
1351                      DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC"),
1352                      DMI_MATCH(DMI_BOARD_NAME, "<A7V>"),
1353                      /* newer BIOS, Revision 1011, does work */
1354                      DMI_MATCH(DMI_BIOS_VERSION,
1355                                "ASUS A7V ACPI BIOS Revision 1007"),
1356                      },
1357          },
1358         {
1359                 /*
1360                  * Latest BIOS for IBM 600E (1.16) has bad pcinum
1361                  * for LPC bridge, which is needed for the PCI
1362                  * interrupt links to work. DSDT fix is in bug 5966.
1363                  * 2645, 2646 model numbers are shared with 600/600E/600X
1364                  */
1365          .callback = disable_acpi_irq,
1366          .ident = "IBM Thinkpad 600 Series 2645",
1367          .matches = {
1368                      DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1369                      DMI_MATCH(DMI_BOARD_NAME, "2645"),
1370                      },
1371          },
1372         {
1373          .callback = disable_acpi_irq,
1374          .ident = "IBM Thinkpad 600 Series 2646",
1375          .matches = {
1376                      DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1377                      DMI_MATCH(DMI_BOARD_NAME, "2646"),
1378                      },
1379          },
1380         /*
1381          * Boxes that need ACPI PCI IRQ routing and PCI scan disabled
1382          */
1383         {                       /* _BBN 0 bug */
1384          .callback = disable_acpi_pci,
1385          .ident = "ASUS PR-DLS",
1386          .matches = {
1387                      DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1388                      DMI_MATCH(DMI_BOARD_NAME, "PR-DLS"),
1389                      DMI_MATCH(DMI_BIOS_VERSION,
1390                                "ASUS PR-DLS ACPI BIOS Revision 1010"),
1391                      DMI_MATCH(DMI_BIOS_DATE, "03/21/2003")
1392                      },
1393          },
1394         {
1395          .callback = disable_acpi_pci,
1396          .ident = "Acer TravelMate 36x Laptop",
1397          .matches = {
1398                      DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
1399                      DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"),
1400                      },
1401          },
1402         {}
1403 };
1404
1405 /* second table for DMI checks that should run after early-quirks */
1406 static struct dmi_system_id __initdata acpi_dmi_table_late[] = {
1407         /*
1408          * HP laptops which use a DSDT reporting as HP/SB400/10000,
1409          * which includes some code which overrides all temperature
1410          * trip points to 16C if the INTIN2 input of the I/O APIC
1411          * is enabled.  This input is incorrectly designated the
1412          * ISA IRQ 0 via an interrupt source override even though
1413          * it is wired to the output of the master 8259A and INTIN0
1414          * is not connected at all.  Force ignoring BIOS IRQ0 pin2
1415          * override in that cases.
1416          */
1417         {
1418          .callback = dmi_ignore_irq0_timer_override,
1419          .ident = "HP nx6115 laptop",
1420          .matches = {
1421                      DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1422                      DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6115"),
1423                      },
1424          },
1425         {
1426          .callback = dmi_ignore_irq0_timer_override,
1427          .ident = "HP NX6125 laptop",
1428          .matches = {
1429                      DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1430                      DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6125"),
1431                      },
1432          },
1433         {
1434          .callback = dmi_ignore_irq0_timer_override,
1435          .ident = "HP NX6325 laptop",
1436          .matches = {
1437                      DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1438                      DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6325"),
1439                      },
1440          },
1441         {
1442          .callback = dmi_ignore_irq0_timer_override,
1443          .ident = "HP 6715b laptop",
1444          .matches = {
1445                      DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1446                      DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq 6715b"),
1447                      },
1448          },
1449         {}
1450 };
1451
1452 /*
1453  * acpi_boot_table_init() and acpi_boot_init()
1454  *  called from setup_arch(), always.
1455  *      1. checksums all tables
1456  *      2. enumerates lapics
1457  *      3. enumerates io-apics
1458  *
1459  * acpi_table_init() is separate to allow reading SRAT without
1460  * other side effects.
1461  *
1462  * side effects of acpi_boot_init:
1463  *      acpi_lapic = 1 if LAPIC found
1464  *      acpi_ioapic = 1 if IOAPIC found
1465  *      if (acpi_lapic && acpi_ioapic) smp_found_config = 1;
1466  *      if acpi_blacklisted() acpi_disabled = 1;
1467  *      acpi_irq_model=...
1468  *      ...
1469  */
1470
1471 void __init acpi_boot_table_init(void)
1472 {
1473         dmi_check_system(acpi_dmi_table);
1474
1475         /*
1476          * If acpi_disabled, bail out
1477          * One exception: acpi=ht continues far enough to enumerate LAPICs
1478          */
1479         if (acpi_disabled && !acpi_ht)
1480                 return;
1481
1482         /*
1483          * Initialize the ACPI boot-time table parser.
1484          */
1485         if (acpi_table_init()) {
1486                 disable_acpi();
1487                 return;
1488         }
1489
1490         acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1491
1492         /*
1493          * blacklist may disable ACPI entirely
1494          */
1495         if (acpi_blacklisted()) {
1496                 if (acpi_force) {
1497                         printk(KERN_WARNING PREFIX "acpi=force override\n");
1498                 } else {
1499                         printk(KERN_WARNING PREFIX "Disabling ACPI support\n");
1500                         disable_acpi();
1501                         return;
1502                 }
1503         }
1504 }
1505
1506 int __init early_acpi_boot_init(void)
1507 {
1508         /*
1509          * If acpi_disabled, bail out
1510          * One exception: acpi=ht continues far enough to enumerate LAPICs
1511          */
1512         if (acpi_disabled && !acpi_ht)
1513                 return 1;
1514
1515         /*
1516          * Process the Multiple APIC Description Table (MADT), if present
1517          */
1518         early_acpi_process_madt();
1519
1520         return 0;
1521 }
1522
1523 int __init acpi_boot_init(void)
1524 {
1525         /* those are executed after early-quirks are executed */
1526         dmi_check_system(acpi_dmi_table_late);
1527
1528         /*
1529          * If acpi_disabled, bail out
1530          * One exception: acpi=ht continues far enough to enumerate LAPICs
1531          */
1532         if (acpi_disabled && !acpi_ht)
1533                 return 1;
1534
1535         acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1536
1537         /*
1538          * set sci_int and PM timer address
1539          */
1540         acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt);
1541
1542         /*
1543          * Process the Multiple APIC Description Table (MADT), if present
1544          */
1545         acpi_process_madt();
1546
1547         acpi_table_parse(ACPI_SIG_HPET, acpi_parse_hpet);
1548
1549         if (!acpi_noirq)
1550                 x86_init.pci.init = pci_acpi_init;
1551
1552         return 0;
1553 }
1554
1555 static int __init parse_acpi(char *arg)
1556 {
1557         if (!arg)
1558                 return -EINVAL;
1559
1560         /* "acpi=off" disables both ACPI table parsing and interpreter */
1561         if (strcmp(arg, "off") == 0) {
1562                 disable_acpi();
1563         }
1564         /* acpi=force to over-ride black-list */
1565         else if (strcmp(arg, "force") == 0) {
1566                 acpi_force = 1;
1567                 acpi_ht = 1;
1568                 acpi_disabled = 0;
1569         }
1570         /* acpi=strict disables out-of-spec workarounds */
1571         else if (strcmp(arg, "strict") == 0) {
1572                 acpi_strict = 1;
1573         }
1574         /* Limit ACPI just to boot-time to enable HT */
1575         else if (strcmp(arg, "ht") == 0) {
1576                 if (!acpi_force) {
1577                         printk(KERN_WARNING "acpi=ht will be removed in Linux-2.6.35\n");
1578                         disable_acpi();
1579                 }
1580                 acpi_ht = 1;
1581         }
1582         /* acpi=rsdt use RSDT instead of XSDT */
1583         else if (strcmp(arg, "rsdt") == 0) {
1584                 acpi_rsdt_forced = 1;
1585         }
1586         /* "acpi=noirq" disables ACPI interrupt routing */
1587         else if (strcmp(arg, "noirq") == 0) {
1588                 acpi_noirq_set();
1589         } else {
1590                 /* Core will printk when we return error. */
1591                 return -EINVAL;
1592         }
1593         return 0;
1594 }
1595 early_param("acpi", parse_acpi);
1596
1597 /* FIXME: Using pci= for an ACPI parameter is a travesty. */
1598 static int __init parse_pci(char *arg)
1599 {
1600         if (arg && strcmp(arg, "noacpi") == 0)
1601                 acpi_disable_pci();
1602         return 0;
1603 }
1604 early_param("pci", parse_pci);
1605
1606 int __init acpi_mps_check(void)
1607 {
1608 #if defined(CONFIG_X86_LOCAL_APIC) && !defined(CONFIG_X86_MPPARSE)
1609 /* mptable code is not built-in*/
1610         if (acpi_disabled || acpi_noirq) {
1611                 printk(KERN_WARNING "MPS support code is not built-in.\n"
1612                        "Using acpi=off or acpi=noirq or pci=noacpi "
1613                        "may have problem\n");
1614                 return 1;
1615         }
1616 #endif
1617         return 0;
1618 }
1619
1620 #ifdef CONFIG_X86_IO_APIC
1621 static int __init parse_acpi_skip_timer_override(char *arg)
1622 {
1623         acpi_skip_timer_override = 1;
1624         return 0;
1625 }
1626 early_param("acpi_skip_timer_override", parse_acpi_skip_timer_override);
1627
1628 static int __init parse_acpi_use_timer_override(char *arg)
1629 {
1630         acpi_use_timer_override = 1;
1631         return 0;
1632 }
1633 early_param("acpi_use_timer_override", parse_acpi_use_timer_override);
1634 #endif /* CONFIG_X86_IO_APIC */
1635
1636 static int __init setup_acpi_sci(char *s)
1637 {
1638         if (!s)
1639                 return -EINVAL;
1640         if (!strcmp(s, "edge"))
1641                 acpi_sci_flags =  ACPI_MADT_TRIGGER_EDGE |
1642                         (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1643         else if (!strcmp(s, "level"))
1644                 acpi_sci_flags = ACPI_MADT_TRIGGER_LEVEL |
1645                         (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1646         else if (!strcmp(s, "high"))
1647                 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_HIGH |
1648                         (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1649         else if (!strcmp(s, "low"))
1650                 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_LOW |
1651                         (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1652         else
1653                 return -EINVAL;
1654         return 0;
1655 }
1656 early_param("acpi_sci", setup_acpi_sci);
1657
1658 int __acpi_acquire_global_lock(unsigned int *lock)
1659 {
1660         unsigned int old, new, val;
1661         do {
1662                 old = *lock;
1663                 new = (((old & ~0x3) + 2) + ((old >> 1) & 0x1));
1664                 val = cmpxchg(lock, old, new);
1665         } while (unlikely (val != old));
1666         return (new < 3) ? -1 : 0;
1667 }
1668
1669 int __acpi_release_global_lock(unsigned int *lock)
1670 {
1671         unsigned int old, new, val;
1672         do {
1673                 old = *lock;
1674                 new = old & ~0x3;
1675                 val = cmpxchg(lock, old, new);
1676         } while (unlikely (val != old));
1677         return old & 0x1;
1678 }