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