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/bootmem.h>
  35 #include <linux/ioport.h>
  36 #include <linux/pci.h>
  37
  38 #include <asm/pgtable.h>
  39 #include <asm/io_apic.h>
  40 #include <asm/apic.h>
  41 #include <asm/io.h>
  42 #include <asm/mpspec.h>
  43 #include <asm/smp.h>
  44
  45 static int __initdata acpi_force = 0;
  46 u32 acpi_rsdt_forced;
  47 int acpi_disabled;
  48 EXPORT_SYMBOL(acpi_disabled);
  49
  50 #ifdef  CONFIG_X86_64
  51 # include <asm/proto.h>
  52 #endif                          /* X86 */
  53
  54 #define BAD_MADT_ENTRY(entry, end) (                                        \
  55                 (!entry) || (unsigned long)entry + sizeof(*entry) > end ||  \
  56                 ((struct acpi_subtable_header *)entry)->length < sizeof(*entry))
  57
  58 #define PREFIX                  "ACPI: "
  59
  60 int acpi_noirq;                         /* skip ACPI IRQ initialization */
  61 int acpi_pci_disabled;          /* skip ACPI PCI scan and IRQ initialization */
  62 EXPORT_SYMBOL(acpi_pci_disabled);
  63 int acpi_ht __initdata = 1;     /* enable HT */
  64
  65 int acpi_lapic;
  66 int acpi_ioapic;
  67 int acpi_strict;
  68
  69 u8 acpi_sci_flags __initdata;
  70 int acpi_sci_override_gsi __initdata;
  71 int acpi_skip_timer_override __initdata;
  72 int acpi_use_timer_override __initdata;
  73
  74 #ifdef CONFIG_X86_LOCAL_APIC
  75 static u64 acpi_lapic_addr __initdata = APIC_DEFAULT_PHYS_BASE;
  76 #endif
  77
  78 #ifndef __HAVE_ARCH_CMPXCHG
  79 #warning ACPI uses CMPXCHG, i486 and later hardware
  80 #endif
  81
  82 /* --------------------------------------------------------------------------
  83                               Boot-time Configuration
  84    -------------------------------------------------------------------------- */
  85
  86 /*
  87  * The default interrupt routing model is PIC (8259).  This gets
  88  * overridden if IOAPICs are enumerated (below).
  89  */
  90 enum acpi_irq_model_id acpi_irq_model = ACPI_IRQ_MODEL_PIC;
  91
  92
  93 /*
  94  * Temporarily use the virtual area starting from FIX_IO_APIC_BASE_END,
  95  * to map the target physical address. The problem is that set_fixmap()
  96  * provides a single page, and it is possible that the page is not
  97  * sufficient.
  98  * By using this area, we can map up to MAX_IO_APICS pages temporarily,
  99  * i.e. until the next __va_range() call.
 100  *
 101  * Important Safety Note:  The fixed I/O APIC page numbers are *subtracted*
 102  * from the fixed base.  That's why we start at FIX_IO_APIC_BASE_END and
 103  * count idx down while incrementing the phys address.
 104  */
 105 char *__init __acpi_map_table(unsigned long phys, unsigned long size)
 106 {
 107
 108         if (!phys || !size)
 109                 return NULL;
 110
 111         return early_ioremap(phys, size);
 112 }
 113 void __init __acpi_unmap_table(char *map, unsigned long size)
 114 {
 115         if (!map || !size)
 116                 return;
 117
 118         early_iounmap(map, size);
 119 }
 120
 121 #ifdef CONFIG_X86_LOCAL_APIC
 122 static int __init acpi_parse_madt(struct acpi_table_header *table)
 123 {
 124         struct acpi_table_madt *madt = NULL;
 125
 126         if (!cpu_has_apic)
 127                 return -EINVAL;
 128
 129         madt = (struct acpi_table_madt *)table;
 130         if (!madt) {
 131                 printk(KERN_WARNING PREFIX "Unable to map MADT\n");
 132                 return -ENODEV;
 133         }
 134
 135         if (madt->address) {
 136                 acpi_lapic_addr = (u64) madt->address;
 137
 138                 printk(KERN_DEBUG PREFIX "Local APIC address 0x%08x\n",
 139                        madt->address);
 140         }
 141
 142         default_acpi_madt_oem_check(madt->header.oem_id,
 143                                     madt->header.oem_table_id);
 144
 145         return 0;
 146 }
 147
 148 static void __cpuinit acpi_register_lapic(int id, u8 enabled)
 149 {
 150         unsigned int ver = 0;
 151
 152         if (!enabled) {
 153                 ++disabled_cpus;
 154                 return;
 155         }
 156
 157         if (boot_cpu_physical_apicid != -1U)
 158                 ver = apic_version[boot_cpu_physical_apicid];
 159
 160         generic_processor_info(id, ver);
 161 }
 162
 163 static int __init
 164 acpi_parse_x2apic(struct acpi_subtable_header *header, const unsigned long end)
 165 {
 166         struct acpi_madt_local_x2apic *processor = NULL;
 167
 168         processor = (struct acpi_madt_local_x2apic *)header;
 169
 170         if (BAD_MADT_ENTRY(processor, end))
 171                 return -EINVAL;
 172
 173         acpi_table_print_madt_entry(header);
 174
 175 #ifdef CONFIG_X86_X2APIC
 176         /*
 177          * We need to register disabled CPU as well to permit
 178          * counting disabled CPUs. This allows us to size
 179          * cpus_possible_map more accurately, to permit
 180          * to not preallocating memory for all NR_CPUS
 181          * when we use CPU hotplug.
 182          */
 183         acpi_register_lapic(processor->local_apic_id,   /* APIC ID */
 184                             processor->lapic_flags & ACPI_MADT_ENABLED);
 185 #else
 186         printk(KERN_WARNING PREFIX "x2apic entry ignored\n");
 187 #endif
 188
 189         return 0;
 190 }
 191
 192 static int __init
 193 acpi_parse_lapic(struct acpi_subtable_header * header, const unsigned long end)
 194 {
 195         struct acpi_madt_local_apic *processor = NULL;
 196
 197         processor = (struct acpi_madt_local_apic *)header;
 198
 199         if (BAD_MADT_ENTRY(processor, end))
 200                 return -EINVAL;
 201
 202         acpi_table_print_madt_entry(header);
 203
 204         /*
 205          * We need to register disabled CPU as well to permit
 206          * counting disabled CPUs. This allows us to size
 207          * cpus_possible_map more accurately, to permit
 208          * to not preallocating memory for all NR_CPUS
 209          * when we use CPU hotplug.
 210          */
 211         acpi_register_lapic(processor->id,      /* APIC ID */
 212                             processor->lapic_flags & ACPI_MADT_ENABLED);
 213
 214         return 0;
 215 }
 216
 217 static int __init
 218 acpi_parse_sapic(struct acpi_subtable_header *header, const unsigned long end)
 219 {
 220         struct acpi_madt_local_sapic *processor = NULL;
 221
 222         processor = (struct acpi_madt_local_sapic *)header;
 223
 224         if (BAD_MADT_ENTRY(processor, end))
 225                 return -EINVAL;
 226
 227         acpi_table_print_madt_entry(header);
 228
 229         acpi_register_lapic((processor->id << 8) | processor->eid,/* APIC ID */
 230                             processor->lapic_flags & ACPI_MADT_ENABLED);
 231
 232         return 0;
 233 }
 234
 235 static int __init
 236 acpi_parse_lapic_addr_ovr(struct acpi_subtable_header * header,
 237                           const unsigned long end)
 238 {
 239         struct acpi_madt_local_apic_override *lapic_addr_ovr = NULL;
 240
 241         lapic_addr_ovr = (struct acpi_madt_local_apic_override *)header;
 242
 243         if (BAD_MADT_ENTRY(lapic_addr_ovr, end))
 244                 return -EINVAL;
 245
 246         acpi_lapic_addr = lapic_addr_ovr->address;
 247
 248         return 0;
 249 }
 250
 251 static int __init
 252 acpi_parse_x2apic_nmi(struct acpi_subtable_header *header,
 253                       const unsigned long end)
 254 {
 255         struct acpi_madt_local_x2apic_nmi *x2apic_nmi = NULL;
 256
 257         x2apic_nmi = (struct acpi_madt_local_x2apic_nmi *)header;
 258
 259         if (BAD_MADT_ENTRY(x2apic_nmi, end))
 260                 return -EINVAL;
 261
 262         acpi_table_print_madt_entry(header);
 263
 264         if (x2apic_nmi->lint != 1)
 265                 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n");
 266
 267         return 0;
 268 }
 269
 270 static int __init
 271 acpi_parse_lapic_nmi(struct acpi_subtable_header * header, const unsigned long end)
 272 {
 273         struct acpi_madt_local_apic_nmi *lapic_nmi = NULL;
 274
 275         lapic_nmi = (struct acpi_madt_local_apic_nmi *)header;
 276
 277         if (BAD_MADT_ENTRY(lapic_nmi, end))
 278                 return -EINVAL;
 279
 280         acpi_table_print_madt_entry(header);
 281
 282         if (lapic_nmi->lint != 1)
 283                 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n");
 284
 285         return 0;
 286 }
 287
 288 #endif                          /*CONFIG_X86_LOCAL_APIC */
 289
 290 #ifdef CONFIG_X86_IO_APIC
 291
 292 static int __init
 293 acpi_parse_ioapic(struct acpi_subtable_header * header, const unsigned long end)
 294 {
 295         struct acpi_madt_io_apic *ioapic = NULL;
 296
 297         ioapic = (struct acpi_madt_io_apic *)header;
 298
 299         if (BAD_MADT_ENTRY(ioapic, end))
 300                 return -EINVAL;
 301
 302         acpi_table_print_madt_entry(header);
 303
 304         mp_register_ioapic(ioapic->id,
 305                            ioapic->address, ioapic->global_irq_base);
 306
 307         return 0;
 308 }
 309
 310 /*
 311  * Parse Interrupt Source Override for the ACPI SCI
 312  */
 313 static void __init acpi_sci_ioapic_setup(u32 gsi, u16 polarity, u16 trigger)
 314 {
 315         if (trigger == 0)       /* compatible SCI trigger is level */
 316                 trigger = 3;
 317
 318         if (polarity == 0)      /* compatible SCI polarity is low */
 319                 polarity = 3;
 320
 321         /* Command-line over-ride via acpi_sci= */
 322         if (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK)
 323                 trigger = (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2;
 324
 325         if (acpi_sci_flags & ACPI_MADT_POLARITY_MASK)
 326                 polarity = acpi_sci_flags & ACPI_MADT_POLARITY_MASK;
 327
 328         /*
 329          * mp_config_acpi_legacy_irqs() already setup IRQs < 16
 330          * If GSI is < 16, this will update its flags,
 331          * else it will create a new mp_irqs[] entry.
 332          */
 333         mp_override_legacy_irq(gsi, polarity, trigger, gsi);
 334
 335         /*
 336          * stash over-ride to indicate we've been here
 337          * and for later update of acpi_gbl_FADT
 338          */
 339         acpi_sci_override_gsi = gsi;
 340         return;
 341 }
 342
 343 static int __init
 344 acpi_parse_int_src_ovr(struct acpi_subtable_header * header,
 345                        const unsigned long end)
 346 {
 347         struct acpi_madt_interrupt_override *intsrc = NULL;
 348
 349         intsrc = (struct acpi_madt_interrupt_override *)header;
 350
 351         if (BAD_MADT_ENTRY(intsrc, end))
 352                 return -EINVAL;
 353
 354         acpi_table_print_madt_entry(header);
 355
 356         if (intsrc->source_irq == acpi_gbl_FADT.sci_interrupt) {
 357                 acpi_sci_ioapic_setup(intsrc->global_irq,
 358                                       intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
 359                                       (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2);
 360                 return 0;
 361         }
 362
 363         if (acpi_skip_timer_override &&
 364             intsrc->source_irq == 0 && intsrc->global_irq == 2) {
 365                 printk(PREFIX "BIOS IRQ0 pin2 override ignored.\n");
 366                 return 0;
 367         }
 368
 369         mp_override_legacy_irq(intsrc->source_irq,
 370                                 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
 371                                 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2,
 372                                 intsrc->global_irq);
 373
 374         return 0;
 375 }
 376
 377 static int __init
 378 acpi_parse_nmi_src(struct acpi_subtable_header * header, const unsigned long end)
 379 {
 380         struct acpi_madt_nmi_source *nmi_src = NULL;
 381
 382         nmi_src = (struct acpi_madt_nmi_source *)header;
 383
 384         if (BAD_MADT_ENTRY(nmi_src, end))
 385                 return -EINVAL;
 386
 387         acpi_table_print_madt_entry(header);
 388
 389         /* TBD: Support nimsrc entries? */
 390
 391         return 0;
 392 }
 393
 394 #endif                          /* CONFIG_X86_IO_APIC */
 395
 396 /*
 397  * acpi_pic_sci_set_trigger()
 398  *
 399  * use ELCR to set PIC-mode trigger type for SCI
 400  *
 401  * If a PIC-mode SCI is not recognized or gives spurious IRQ7's
 402  * it may require Edge Trigger -- use "acpi_sci=edge"
 403  *
 404  * Port 0x4d0-4d1 are ECLR1 and ECLR2, the Edge/Level Control Registers
 405  * for the 8259 PIC.  bit[n] = 1 means irq[n] is Level, otherwise Edge.
 406  * ECLR1 is IRQs 0-7 (IRQ 0, 1, 2 must be 0)
 407  * ECLR2 is IRQs 8-15 (IRQ 8, 13 must be 0)
 408  */
 409
 410 void __init acpi_pic_sci_set_trigger(unsigned int irq, u16 trigger)
 411 {
 412         unsigned int mask = 1 << irq;
 413         unsigned int old, new;
 414
 415         /* Real old ELCR mask */
 416         old = inb(0x4d0) | (inb(0x4d1) << 8);
 417
 418         /*
 419          * If we use ACPI to set PCI IRQs, then we should clear ELCR
 420          * since we will set it correctly as we enable the PCI irq
 421          * routing.
 422          */
 423         new = acpi_noirq ? old : 0;
 424
 425         /*
 426          * Update SCI information in the ELCR, it isn't in the PCI
 427          * routing tables..
 428          */
 429         switch (trigger) {
 430         case 1:         /* Edge - clear */
 431                 new &= ~mask;
 432                 break;
 433         case 3:         /* Level - set */
 434                 new |= mask;
 435                 break;
 436         }
 437
 438         if (old == new)
 439                 return;
 440
 441         printk(PREFIX "setting ELCR to %04x (from %04x)\n", new, old);
 442         outb(new, 0x4d0);
 443         outb(new >> 8, 0x4d1);
 444 }
 445
 446 int acpi_gsi_to_irq(u32 gsi, unsigned int *irq)
 447 {
 448         *irq = gsi;
 449         return 0;
 450 }
 451
 452 /*
 453  * success: return IRQ number (>=0)
 454  * failure: return < 0
 455  */
 456 int acpi_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity)
 457 {
 458         unsigned int irq;
 459         unsigned int plat_gsi = gsi;
 460
 461 #ifdef CONFIG_PCI
 462         /*
 463          * Make sure all (legacy) PCI IRQs are set as level-triggered.
 464          */
 465         if (acpi_irq_model == ACPI_IRQ_MODEL_PIC) {
 466                 if (trigger == ACPI_LEVEL_SENSITIVE)
 467                         eisa_set_level_irq(gsi);
 468         }
 469 #endif
 470
 471 #ifdef CONFIG_X86_IO_APIC
 472         if (acpi_irq_model == ACPI_IRQ_MODEL_IOAPIC) {
 473                 plat_gsi = mp_register_gsi(dev, gsi, trigger, polarity);
 474         }
 475 #endif
 476         acpi_gsi_to_irq(plat_gsi, &irq);
 477         return irq;
 478 }
 479
 480 /*
 481  *  ACPI based hotplug support for CPU
 482  */
 483 #ifdef CONFIG_ACPI_HOTPLUG_CPU
 484
 485 static int __cpuinit _acpi_map_lsapic(acpi_handle handle, int *pcpu)
 486 {
 487         struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
 488         union acpi_object *obj;
 489         struct acpi_madt_local_apic *lapic;
 490         cpumask_var_t tmp_map, new_map;
 491         u8 physid;
 492         int cpu;
 493         int retval = -ENOMEM;
 494
 495         if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer)))
 496                 return -EINVAL;
 497
 498         if (!buffer.length || !buffer.pointer)
 499                 return -EINVAL;
 500
 501         obj = buffer.pointer;
 502         if (obj->type != ACPI_TYPE_BUFFER ||
 503             obj->buffer.length < sizeof(*lapic)) {
 504                 kfree(buffer.pointer);
 505                 return -EINVAL;
 506         }
 507
 508         lapic = (struct acpi_madt_local_apic *)obj->buffer.pointer;
 509
 510         if (lapic->header.type != ACPI_MADT_TYPE_LOCAL_APIC ||
 511             !(lapic->lapic_flags & ACPI_MADT_ENABLED)) {
 512                 kfree(buffer.pointer);
 513                 return -EINVAL;
 514         }
 515
 516         physid = lapic->id;
 517
 518         kfree(buffer.pointer);
 519         buffer.length = ACPI_ALLOCATE_BUFFER;
 520         buffer.pointer = NULL;
 521
 522         if (!alloc_cpumask_var(&tmp_map, GFP_KERNEL))
 523                 goto out;
 524
 525         if (!alloc_cpumask_var(&new_map, GFP_KERNEL))
 526                 goto free_tmp_map;
 527
 528         cpumask_copy(tmp_map, cpu_present_mask);
 529         acpi_register_lapic(physid, lapic->lapic_flags & ACPI_MADT_ENABLED);
 530
 531         /*
 532          * If mp_register_lapic successfully generates a new logical cpu
 533          * number, then the following will get us exactly what was mapped
 534          */
 535         cpumask_andnot(new_map, cpu_present_mask, tmp_map);
 536         if (cpumask_empty(new_map)) {
 537                 printk ("Unable to map lapic to logical cpu number\n");
 538                 retval = -EINVAL;
 539                 goto free_new_map;
 540         }
 541
 542         cpu = cpumask_first(new_map);
 543
 544         *pcpu = cpu;
 545         retval = 0;
 546
 547 free_new_map:
 548         free_cpumask_var(new_map);
 549 free_tmp_map:
 550         free_cpumask_var(tmp_map);
 551 out:
 552         return retval;
 553 }
 554
 555 /* wrapper to silence section mismatch warning */
 556 int __ref acpi_map_lsapic(acpi_handle handle, int *pcpu)
 557 {
 558         return _acpi_map_lsapic(handle, pcpu);
 559 }
 560 EXPORT_SYMBOL(acpi_map_lsapic);
 561
 562 int acpi_unmap_lsapic(int cpu)
 563 {
 564         per_cpu(x86_cpu_to_apicid, cpu) = -1;
 565         set_cpu_present(cpu, false);
 566         num_processors--;
 567
 568         return (0);
 569 }
 570
 571 EXPORT_SYMBOL(acpi_unmap_lsapic);
 572 #endif                          /* CONFIG_ACPI_HOTPLUG_CPU */
 573
 574 int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base)
 575 {
 576         /* TBD */
 577         return -EINVAL;
 578 }
 579
 580 EXPORT_SYMBOL(acpi_register_ioapic);
 581
 582 int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base)
 583 {
 584         /* TBD */
 585         return -EINVAL;
 586 }
 587
 588 EXPORT_SYMBOL(acpi_unregister_ioapic);
 589
 590 static int __init acpi_parse_sbf(struct acpi_table_header *table)
 591 {
 592         struct acpi_table_boot *sb;
 593
 594         sb = (struct acpi_table_boot *)table;
 595         if (!sb) {
 596                 printk(KERN_WARNING PREFIX "Unable to map SBF\n");
 597                 return -ENODEV;
 598         }
 599
 600         sbf_port = sb->cmos_index;      /* Save CMOS port */
 601
 602         return 0;
 603 }
 604
 605 #ifdef CONFIG_HPET_TIMER
 606 #include <asm/hpet.h>
 607
 608 static struct __initdata resource *hpet_res;
 609
 610 static int __init acpi_parse_hpet(struct acpi_table_header *table)
 611 {
 612         struct acpi_table_hpet *hpet_tbl;
 613
 614         hpet_tbl = (struct acpi_table_hpet *)table;
 615         if (!hpet_tbl) {
 616                 printk(KERN_WARNING PREFIX "Unable to map HPET\n");
 617                 return -ENODEV;
 618         }
 619
 620         if (hpet_tbl->address.space_id != ACPI_SPACE_MEM) {
 621                 printk(KERN_WARNING PREFIX "HPET timers must be located in "
 622                        "memory.\n");
 623                 return -1;
 624         }
 625
 626         hpet_address = hpet_tbl->address.address;
 627
 628         /*
 629          * Some broken BIOSes advertise HPET at 0x0. We really do not
 630          * want to allocate a resource there.
 631          */
 632         if (!hpet_address) {
 633                 printk(KERN_WARNING PREFIX
 634                        "HPET id: %#x base: %#lx is invalid\n",
 635                        hpet_tbl->id, hpet_address);
 636                 return 0;
 637         }
 638 #ifdef CONFIG_X86_64
 639         /*
 640          * Some even more broken BIOSes advertise HPET at
 641          * 0xfed0000000000000 instead of 0xfed00000. Fix it up and add
 642          * some noise:
 643          */
 644         if (hpet_address == 0xfed0000000000000UL) {
 645                 if (!hpet_force_user) {
 646                         printk(KERN_WARNING PREFIX "HPET id: %#x "
 647                                "base: 0xfed0000000000000 is bogus\n "
 648                                "try hpet=force on the kernel command line to "
 649                                "fix it up to 0xfed00000.\n", hpet_tbl->id);
 650                         hpet_address = 0;
 651                         return 0;
 652                 }
 653                 printk(KERN_WARNING PREFIX
 654                        "HPET id: %#x base: 0xfed0000000000000 fixed up "
 655                        "to 0xfed00000.\n", hpet_tbl->id);
 656                 hpet_address >>= 32;
 657         }
 658 #endif
 659         printk(KERN_INFO PREFIX "HPET id: %#x base: %#lx\n",
 660                hpet_tbl->id, hpet_address);
 661
 662         /*
 663          * Allocate and initialize the HPET firmware resource for adding into
 664          * the resource tree during the lateinit timeframe.
 665          */
 666 #define HPET_RESOURCE_NAME_SIZE 9
 667         hpet_res = alloc_bootmem(sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE);
 668
 669         hpet_res->name = (void *)&hpet_res[1];
 670         hpet_res->flags = IORESOURCE_MEM;
 671         snprintf((char *)hpet_res->name, HPET_RESOURCE_NAME_SIZE, "HPET %u",
 672                  hpet_tbl->sequence);
 673
 674         hpet_res->start = hpet_address;
 675         hpet_res->end = hpet_address + (1 * 1024) - 1;
 676
 677         return 0;
 678 }
 679
 680 /*
 681  * hpet_insert_resource inserts the HPET resources used into the resource
 682  * tree.
 683  */
 684 static __init int hpet_insert_resource(void)
 685 {
 686         if (!hpet_res)
 687                 return 1;
 688
 689         return insert_resource(&iomem_resource, hpet_res);
 690 }
 691
 692 late_initcall(hpet_insert_resource);
 693
 694 #else
 695 #define acpi_parse_hpet NULL
 696 #endif
 697
 698 static int __init acpi_parse_fadt(struct acpi_table_header *table)
 699 {
 700
 701 #ifdef CONFIG_X86_PM_TIMER
 702         /* detect the location of the ACPI PM Timer */
 703         if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID) {
 704                 /* FADT rev. 2 */
 705                 if (acpi_gbl_FADT.xpm_timer_block.space_id !=
 706                     ACPI_ADR_SPACE_SYSTEM_IO)
 707                         return 0;
 708
 709                 pmtmr_ioport = acpi_gbl_FADT.xpm_timer_block.address;
 710                 /*
 711                  * "X" fields are optional extensions to the original V1.0
 712                  * fields, so we must selectively expand V1.0 fields if the
 713                  * corresponding X field is zero.
 714                  */
 715                 if (!pmtmr_ioport)
 716                         pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
 717         } else {
 718                 /* FADT rev. 1 */
 719                 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
 720         }
 721         if (pmtmr_ioport)
 722                 printk(KERN_INFO PREFIX "PM-Timer IO Port: %#x\n",
 723                        pmtmr_ioport);
 724 #endif
 725         return 0;
 726 }
 727
 728 #ifdef  CONFIG_X86_LOCAL_APIC
 729 /*
 730  * Parse LAPIC entries in MADT
 731  * returns 0 on success, < 0 on error
 732  */
 733
 734 static void __init acpi_register_lapic_address(unsigned long address)
 735 {
 736         mp_lapic_addr = address;
 737
 738         set_fixmap_nocache(FIX_APIC_BASE, address);
 739         if (boot_cpu_physical_apicid == -1U) {
 740                 boot_cpu_physical_apicid  = read_apic_id();
 741                 apic_version[boot_cpu_physical_apicid] =
 742                          GET_APIC_VERSION(apic_read(APIC_LVR));
 743         }
 744 }
 745
 746 static int __init early_acpi_parse_madt_lapic_addr_ovr(void)
 747 {
 748         int count;
 749
 750         if (!cpu_has_apic)
 751                 return -ENODEV;
 752
 753         /*
 754          * Note that the LAPIC address is obtained from the MADT (32-bit value)
 755          * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value).
 756          */
 757
 758         count =
 759             acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
 760                                   acpi_parse_lapic_addr_ovr, 0);
 761         if (count < 0) {
 762                 printk(KERN_ERR PREFIX
 763                        "Error parsing LAPIC address override entry\n");
 764                 return count;
 765         }
 766
 767         acpi_register_lapic_address(acpi_lapic_addr);
 768
 769         return count;
 770 }
 771
 772 static int __init acpi_parse_madt_lapic_entries(void)
 773 {
 774         int count;
 775         int x2count = 0;
 776
 777         if (!cpu_has_apic)
 778                 return -ENODEV;
 779
 780         /*
 781          * Note that the LAPIC address is obtained from the MADT (32-bit value)
 782          * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value).
 783          */
 784
 785         count =
 786             acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
 787                                   acpi_parse_lapic_addr_ovr, 0);
 788         if (count < 0) {
 789                 printk(KERN_ERR PREFIX
 790                        "Error parsing LAPIC address override entry\n");
 791                 return count;
 792         }
 793
 794         acpi_register_lapic_address(acpi_lapic_addr);
 795
 796         count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC,
 797                                       acpi_parse_sapic, MAX_APICS);
 798
 799         if (!count) {
 800                 x2count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC,
 801                                                 acpi_parse_x2apic, MAX_APICS);
 802                 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC,
 803                                               acpi_parse_lapic, MAX_APICS);
 804         }
 805         if (!count && !x2count) {
 806                 printk(KERN_ERR PREFIX "No LAPIC entries present\n");
 807                 /* TBD: Cleanup to allow fallback to MPS */
 808                 return -ENODEV;
 809         } else if (count < 0 || x2count < 0) {
 810                 printk(KERN_ERR PREFIX "Error parsing LAPIC entry\n");
 811                 /* TBD: Cleanup to allow fallback to MPS */
 812                 return count;
 813         }
 814
 815         x2count =
 816             acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC_NMI,
 817                                   acpi_parse_x2apic_nmi, 0);
 818         count =
 819             acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI, acpi_parse_lapic_nmi, 0);
 820         if (count < 0 || x2count < 0) {
 821                 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n");
 822                 /* TBD: Cleanup to allow fallback to MPS */
 823                 return count;
 824         }
 825         return 0;
 826 }
 827 #endif                          /* CONFIG_X86_LOCAL_APIC */
 828
 829 #ifdef  CONFIG_X86_IO_APIC
 830 #define MP_ISA_BUS              0
 831
 832 #ifdef CONFIG_X86_ES7000
 833 extern int es7000_plat;
 834 #endif
 835
 836 int __init acpi_probe_gsi(void)
 837 {
 838         int idx;
 839         int gsi;
 840         int max_gsi = 0;
 841
 842         if (acpi_disabled)
 843                 return 0;
 844
 845         if (!acpi_ioapic)
 846                 return 0;
 847
 848         max_gsi = 0;
 849         for (idx = 0; idx < nr_ioapics; idx++) {
 850                 gsi = mp_gsi_routing[idx].gsi_end;
 851
 852                 if (gsi > max_gsi)
 853                         max_gsi = gsi;
 854         }
 855
 856         return max_gsi + 1;
 857 }
 858
 859 static void assign_to_mp_irq(struct mpc_intsrc *m,
 860                                     struct mpc_intsrc *mp_irq)
 861 {
 862         memcpy(mp_irq, m, sizeof(struct mpc_intsrc));
 863 }
 864
 865 static int mp_irq_cmp(struct mpc_intsrc *mp_irq,
 866                                 struct mpc_intsrc *m)
 867 {
 868         return memcmp(mp_irq, m, sizeof(struct mpc_intsrc));
 869 }
 870
 871 static void save_mp_irq(struct mpc_intsrc *m)
 872 {
 873         int i;
 874
 875         for (i = 0; i < mp_irq_entries; i++) {
 876                 if (!mp_irq_cmp(&mp_irqs[i], m))
 877                         return;
 878         }
 879
 880         assign_to_mp_irq(m, &mp_irqs[mp_irq_entries]);
 881         if (++mp_irq_entries == MAX_IRQ_SOURCES)
 882                 panic("Max # of irq sources exceeded!!\n");
 883 }
 884
 885 void __init mp_override_legacy_irq(u8 bus_irq, u8 polarity, u8 trigger, u32 gsi)
 886 {
 887         int ioapic;
 888         int pin;
 889         struct mpc_intsrc mp_irq;
 890
 891         /*
 892          * Convert 'gsi' to 'ioapic.pin'.
 893          */
 894         ioapic = mp_find_ioapic(gsi);
 895         if (ioapic < 0)
 896                 return;
 897         pin = mp_find_ioapic_pin(ioapic, gsi);
 898
 899         /*
 900          * TBD: This check is for faulty timer entries, where the override
 901          *      erroneously sets the trigger to level, resulting in a HUGE
 902          *      increase of timer interrupts!
 903          */
 904         if ((bus_irq == 0) && (trigger == 3))
 905                 trigger = 1;
 906
 907         mp_irq.type = MP_INTSRC;
 908         mp_irq.irqtype = mp_INT;
 909         mp_irq.irqflag = (trigger << 2) | polarity;
 910         mp_irq.srcbus = MP_ISA_BUS;
 911         mp_irq.srcbusirq = bus_irq;     /* IRQ */
 912         mp_irq.dstapic = mp_ioapics[ioapic].apicid; /* APIC ID */
 913         mp_irq.dstirq = pin;    /* INTIN# */
 914
 915         save_mp_irq(&mp_irq);
 916 }
 917
 918 void __init mp_config_acpi_legacy_irqs(void)
 919 {
 920         int i;
 921         int ioapic;
 922         unsigned int dstapic;
 923         struct mpc_intsrc mp_irq;
 924
 925 #if defined (CONFIG_MCA) || defined (CONFIG_EISA)
 926         /*
 927          * Fabricate the legacy ISA bus (bus #31).
 928          */
 929         mp_bus_id_to_type[MP_ISA_BUS] = MP_BUS_ISA;
 930 #endif
 931         set_bit(MP_ISA_BUS, mp_bus_not_pci);
 932         pr_debug("Bus #%d is ISA\n", MP_ISA_BUS);
 933
 934 #ifdef CONFIG_X86_ES7000
 935         /*
 936          * Older generations of ES7000 have no legacy identity mappings
 937          */
 938         if (es7000_plat == 1)
 939                 return;
 940 #endif
 941
 942         /*
 943          * Locate the IOAPIC that manages the ISA IRQs (0-15).
 944          */
 945         ioapic = mp_find_ioapic(0);
 946         if (ioapic < 0)
 947                 return;
 948         dstapic = mp_ioapics[ioapic].apicid;
 949
 950         /*
 951          * Use the default configuration for the IRQs 0-15.  Unless
 952          * overridden by (MADT) interrupt source override entries.
 953          */
 954         for (i = 0; i < 16; i++) {
 955                 int idx;
 956
 957                 for (idx = 0; idx < mp_irq_entries; idx++) {
 958                         struct mpc_intsrc *irq = mp_irqs + idx;
 959
 960                         /* Do we already have a mapping for this ISA IRQ? */
 961                         if (irq->srcbus == MP_ISA_BUS && irq->srcbusirq == i)
 962                                 break;
 963
 964                         /* Do we already have a mapping for this IOAPIC pin */
 965                         if (irq->dstapic == dstapic && irq->dstirq == i)
 966                                 break;
 967                 }
 968
 969                 if (idx != mp_irq_entries) {
 970                         printk(KERN_DEBUG "ACPI: IRQ%d used by override.\n", i);
 971                         continue;       /* IRQ already used */
 972                 }
 973
 974                 mp_irq.type = MP_INTSRC;
 975                 mp_irq.irqflag = 0;     /* Conforming */
 976                 mp_irq.srcbus = MP_ISA_BUS;
 977                 mp_irq.dstapic = dstapic;
 978                 mp_irq.irqtype = mp_INT;
 979                 mp_irq.srcbusirq = i; /* Identity mapped */
 980                 mp_irq.dstirq = i;
 981
 982                 save_mp_irq(&mp_irq);
 983         }
 984 }
 985
 986 static int mp_config_acpi_gsi(struct device *dev, u32 gsi, int trigger,
 987                         int polarity)
 988 {
 989 #ifdef CONFIG_X86_MPPARSE
 990         struct mpc_intsrc mp_irq;
 991         struct pci_dev *pdev;
 992         unsigned char number;
 993         unsigned int devfn;
 994         int ioapic;
 995         u8 pin;
 996
 997         if (!acpi_ioapic)
 998                 return 0;
 999         if (!dev)
1000                 return 0;
1001         if (dev->bus != &pci_bus_type)
1002                 return 0;
1003
1004         pdev = to_pci_dev(dev);
1005         number = pdev->bus->number;
1006         devfn = pdev->devfn;
1007         pin = pdev->pin;
1008         /* print the entry should happen on mptable identically */
1009         mp_irq.type = MP_INTSRC;
1010         mp_irq.irqtype = mp_INT;
1011         mp_irq.irqflag = (trigger == ACPI_EDGE_SENSITIVE ? 4 : 0x0c) |
1012                                 (polarity == ACPI_ACTIVE_HIGH ? 1 : 3);
1013         mp_irq.srcbus = number;
1014         mp_irq.srcbusirq = (((devfn >> 3) & 0x1f) << 2) | ((pin - 1) & 3);
1015         ioapic = mp_find_ioapic(gsi);
1016         mp_irq.dstapic = mp_ioapics[ioapic].apicid;
1017         mp_irq.dstirq = mp_find_ioapic_pin(ioapic, gsi);
1018
1019         save_mp_irq(&mp_irq);
1020 #endif
1021         return 0;
1022 }
1023
1024 int mp_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity)
1025 {
1026         int ioapic;
1027         int ioapic_pin;
1028         struct io_apic_irq_attr irq_attr;
1029
1030         if (acpi_irq_model != ACPI_IRQ_MODEL_IOAPIC)
1031                 return gsi;
1032
1033         /* Don't set up the ACPI SCI because it's already set up */
1034         if (acpi_gbl_FADT.sci_interrupt == gsi)
1035                 return gsi;
1036
1037         ioapic = mp_find_ioapic(gsi);
1038         if (ioapic < 0) {
1039                 printk(KERN_WARNING "No IOAPIC for GSI %u\n", gsi);
1040                 return gsi;
1041         }
1042
1043         ioapic_pin = mp_find_ioapic_pin(ioapic, gsi);
1044
1045 #ifdef CONFIG_X86_32
1046         if (ioapic_renumber_irq)
1047                 gsi = ioapic_renumber_irq(ioapic, gsi);
1048 #endif
1049
1050         if (ioapic_pin > MP_MAX_IOAPIC_PIN) {
1051                 printk(KERN_ERR "Invalid reference to IOAPIC pin "
1052                        "%d-%d\n", mp_ioapics[ioapic].apicid,
1053                        ioapic_pin);
1054                 return gsi;
1055         }
1056
1057         if (enable_update_mptable)
1058                 mp_config_acpi_gsi(dev, gsi, trigger, polarity);
1059
1060         set_io_apic_irq_attr(&irq_attr, ioapic, ioapic_pin,
1061                              trigger == ACPI_EDGE_SENSITIVE ? 0 : 1,
1062                              polarity == ACPI_ACTIVE_HIGH ? 0 : 1);
1063         io_apic_set_pci_routing(dev, gsi, &irq_attr);
1064
1065         return gsi;
1066 }
1067
1068 /*
1069  * Parse IOAPIC related entries in MADT
1070  * returns 0 on success, < 0 on error
1071  */
1072 static int __init acpi_parse_madt_ioapic_entries(void)
1073 {
1074         int count;
1075
1076         /*
1077          * ACPI interpreter is required to complete interrupt setup,
1078          * so if it is off, don't enumerate the io-apics with ACPI.
1079          * If MPS is present, it will handle them,
1080          * otherwise the system will stay in PIC mode
1081          */
1082         if (acpi_disabled || acpi_noirq)
1083                 return -ENODEV;
1084
1085         if (!cpu_has_apic)
1086                 return -ENODEV;
1087
1088         /*
1089          * if "noapic" boot option, don't look for IO-APICs
1090          */
1091         if (skip_ioapic_setup) {
1092                 printk(KERN_INFO PREFIX "Skipping IOAPIC probe "
1093                        "due to 'noapic' option.\n");
1094                 return -ENODEV;
1095         }
1096
1097         count =
1098             acpi_table_parse_madt(ACPI_MADT_TYPE_IO_APIC, acpi_parse_ioapic,
1099                                   MAX_IO_APICS);
1100         if (!count) {
1101                 printk(KERN_ERR PREFIX "No IOAPIC entries present\n");
1102                 return -ENODEV;
1103         } else if (count < 0) {
1104                 printk(KERN_ERR PREFIX "Error parsing IOAPIC entry\n");
1105                 return count;
1106         }
1107
1108         count =
1109             acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE, acpi_parse_int_src_ovr,
1110                                   nr_irqs);
1111         if (count < 0) {
1112                 printk(KERN_ERR PREFIX
1113                        "Error parsing interrupt source overrides entry\n");
1114                 /* TBD: Cleanup to allow fallback to MPS */
1115                 return count;
1116         }
1117
1118         /*
1119          * If BIOS did not supply an INT_SRC_OVR for the SCI
1120          * pretend we got one so we can set the SCI flags.
1121          */
1122         if (!acpi_sci_override_gsi)
1123                 acpi_sci_ioapic_setup(acpi_gbl_FADT.sci_interrupt, 0, 0);
1124
1125         /* Fill in identity legacy mapings where no override */
1126         mp_config_acpi_legacy_irqs();
1127
1128         count =
1129             acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE, acpi_parse_nmi_src,
1130                                   nr_irqs);
1131         if (count < 0) {
1132                 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n");
1133                 /* TBD: Cleanup to allow fallback to MPS */
1134                 return count;
1135         }
1136
1137         return 0;
1138 }
1139 #else
1140 static inline int acpi_parse_madt_ioapic_entries(void)
1141 {
1142         return -1;
1143 }
1144 #endif  /* !CONFIG_X86_IO_APIC */
1145
1146 static void __init early_acpi_process_madt(void)
1147 {
1148 #ifdef CONFIG_X86_LOCAL_APIC
1149         int error;
1150
1151         if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1152
1153                 /*
1154                  * Parse MADT LAPIC entries
1155                  */
1156                 error = early_acpi_parse_madt_lapic_addr_ovr();
1157                 if (!error) {
1158                         acpi_lapic = 1;
1159                         smp_found_config = 1;
1160                 }
1161                 if (error == -EINVAL) {
1162                         /*
1163                          * Dell Precision Workstation 410, 610 come here.
1164                          */
1165                         printk(KERN_ERR PREFIX
1166                                "Invalid BIOS MADT, disabling ACPI\n");
1167                         disable_acpi();
1168                 }
1169         }
1170 #endif
1171 }
1172
1173 static void __init acpi_process_madt(void)
1174 {
1175 #ifdef CONFIG_X86_LOCAL_APIC
1176         int error;
1177
1178         if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1179
1180                 /*
1181                  * Parse MADT LAPIC entries
1182                  */
1183                 error = acpi_parse_madt_lapic_entries();
1184                 if (!error) {
1185                         acpi_lapic = 1;
1186
1187 #ifdef CONFIG_X86_BIGSMP
1188                         generic_bigsmp_probe();
1189 #endif
1190                         /*
1191                          * Parse MADT IO-APIC entries
1192                          */
1193                         error = acpi_parse_madt_ioapic_entries();
1194                         if (!error) {
1195                                 acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC;
1196                                 acpi_ioapic = 1;
1197
1198                                 smp_found_config = 1;
1199                                 if (apic->setup_apic_routing)
1200                                         apic->setup_apic_routing();
1201                         }
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         } else {
1212                 /*
1213                  * ACPI found no MADT, and so ACPI wants UP PIC mode.
1214                  * In the event an MPS table was found, forget it.
1215                  * Boot with "acpi=off" to use MPS on such a system.
1216                  */
1217                 if (smp_found_config) {
1218                         printk(KERN_WARNING PREFIX
1219                                 "No APIC-table, disabling MPS\n");
1220                         smp_found_config = 0;
1221                 }
1222         }
1223
1224         /*
1225          * ACPI supports both logical (e.g. Hyper-Threading) and physical
1226          * processors, where MPS only supports physical.
1227          */
1228         if (acpi_lapic && acpi_ioapic)
1229                 printk(KERN_INFO "Using ACPI (MADT) for SMP configuration "
1230                        "information\n");
1231         else if (acpi_lapic)
1232                 printk(KERN_INFO "Using ACPI for processor (LAPIC) "
1233                        "configuration information\n");
1234 #endif
1235         return;
1236 }
1237
1238 static int __init disable_acpi_irq(const struct dmi_system_id *d)
1239 {
1240         if (!acpi_force) {
1241                 printk(KERN_NOTICE "%s detected: force use of acpi=noirq\n",
1242                        d->ident);
1243                 acpi_noirq_set();
1244         }
1245         return 0;
1246 }
1247
1248 static int __init disable_acpi_pci(const struct dmi_system_id *d)
1249 {
1250         if (!acpi_force) {
1251                 printk(KERN_NOTICE "%s detected: force use of pci=noacpi\n",
1252                        d->ident);
1253                 acpi_disable_pci();
1254         }
1255         return 0;
1256 }
1257
1258 static int __init dmi_disable_acpi(const struct dmi_system_id *d)
1259 {
1260         if (!acpi_force) {
1261                 printk(KERN_NOTICE "%s detected: acpi off\n", d->ident);
1262                 disable_acpi();
1263         } else {
1264                 printk(KERN_NOTICE
1265                        "Warning: DMI blacklist says broken, but acpi forced\n");
1266         }
1267         return 0;
1268 }
1269
1270 /*
1271  * Limit ACPI to CPU enumeration for HT
1272  */
1273 static int __init force_acpi_ht(const struct dmi_system_id *d)
1274 {
1275         if (!acpi_force) {
1276                 printk(KERN_NOTICE "%s detected: force use of acpi=ht\n",
1277                        d->ident);
1278                 disable_acpi();
1279                 acpi_ht = 1;
1280         } else {
1281                 printk(KERN_NOTICE
1282                        "Warning: acpi=force overrules DMI blacklist: acpi=ht\n");
1283         }
1284         return 0;
1285 }
1286
1287 /*
1288  * Force ignoring BIOS IRQ0 pin2 override
1289  */
1290 static int __init dmi_ignore_irq0_timer_override(const struct dmi_system_id *d)
1291 {
1292         /*
1293          * The ati_ixp4x0_rev() early PCI quirk should have set
1294          * the acpi_skip_timer_override flag already:
1295          */
1296         if (!acpi_skip_timer_override) {
1297                 WARN(1, KERN_ERR "ati_ixp4x0 quirk not complete.\n");
1298                 pr_notice("%s detected: Ignoring BIOS IRQ0 pin2 override\n",
1299                         d->ident);
1300                 acpi_skip_timer_override = 1;
1301         }
1302         return 0;
1303 }
1304
1305 /*
1306  * If your system is blacklisted here, but you find that acpi=force
1307  * works for you, please contact linux-acpi@vger.kernel.org
1308  */
1309 static struct dmi_system_id __initdata acpi_dmi_table[] = {
1310         /*
1311          * Boxes that need ACPI disabled
1312          */
1313         {
1314          .callback = dmi_disable_acpi,
1315          .ident = "IBM Thinkpad",
1316          .matches = {
1317                      DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1318                      DMI_MATCH(DMI_BOARD_NAME, "2629H1G"),
1319                      },
1320          },
1321
1322         /*
1323          * Boxes that need acpi=ht
1324          */
1325         {
1326          .callback = force_acpi_ht,
1327          .ident = "FSC Primergy T850",
1328          .matches = {
1329                      DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
1330                      DMI_MATCH(DMI_PRODUCT_NAME, "PRIMERGY T850"),
1331                      },
1332          },
1333         {
1334          .callback = force_acpi_ht,
1335          .ident = "HP VISUALIZE NT Workstation",
1336          .matches = {
1337                      DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"),
1338                      DMI_MATCH(DMI_PRODUCT_NAME, "HP VISUALIZE NT Workstation"),
1339                      },
1340          },
1341         {
1342          .callback = force_acpi_ht,
1343          .ident = "Compaq Workstation W8000",
1344          .matches = {
1345                      DMI_MATCH(DMI_SYS_VENDOR, "Compaq"),
1346                      DMI_MATCH(DMI_PRODUCT_NAME, "Workstation W8000"),
1347                      },
1348          },
1349         {
1350          .callback = force_acpi_ht,
1351          .ident = "ASUS P2B-DS",
1352          .matches = {
1353                      DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1354                      DMI_MATCH(DMI_BOARD_NAME, "P2B-DS"),
1355                      },
1356          },
1357         {
1358          .callback = force_acpi_ht,
1359          .ident = "ASUS CUR-DLS",
1360          .matches = {
1361                      DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1362                      DMI_MATCH(DMI_BOARD_NAME, "CUR-DLS"),
1363                      },
1364          },
1365         {
1366          .callback = force_acpi_ht,
1367          .ident = "ABIT i440BX-W83977",
1368          .matches = {
1369                      DMI_MATCH(DMI_BOARD_VENDOR, "ABIT <http://www.abit.com>"),
1370                      DMI_MATCH(DMI_BOARD_NAME, "i440BX-W83977 (BP6)"),
1371                      },
1372          },
1373         {
1374          .callback = force_acpi_ht,
1375          .ident = "IBM Bladecenter",
1376          .matches = {
1377                      DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1378                      DMI_MATCH(DMI_BOARD_NAME, "IBM eServer BladeCenter HS20"),
1379                      },
1380          },
1381         {
1382          .callback = force_acpi_ht,
1383          .ident = "IBM eServer xSeries 360",
1384          .matches = {
1385                      DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1386                      DMI_MATCH(DMI_BOARD_NAME, "eServer xSeries 360"),
1387                      },
1388          },
1389         {
1390          .callback = force_acpi_ht,
1391          .ident = "IBM eserver xSeries 330",
1392          .matches = {
1393                      DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1394                      DMI_MATCH(DMI_BOARD_NAME, "eserver xSeries 330"),
1395                      },
1396          },
1397         {
1398          .callback = force_acpi_ht,
1399          .ident = "IBM eserver xSeries 440",
1400          .matches = {
1401                      DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1402                      DMI_MATCH(DMI_PRODUCT_NAME, "eserver xSeries 440"),
1403                      },
1404          },
1405
1406         /*
1407          * Boxes that need ACPI PCI IRQ routing disabled
1408          */
1409         {
1410          .callback = disable_acpi_irq,
1411          .ident = "ASUS A7V",
1412          .matches = {
1413                      DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC"),
1414                      DMI_MATCH(DMI_BOARD_NAME, "<A7V>"),
1415                      /* newer BIOS, Revision 1011, does work */
1416                      DMI_MATCH(DMI_BIOS_VERSION,
1417                                "ASUS A7V ACPI BIOS Revision 1007"),
1418                      },
1419          },
1420         {
1421                 /*
1422                  * Latest BIOS for IBM 600E (1.16) has bad pcinum
1423                  * for LPC bridge, which is needed for the PCI
1424                  * interrupt links to work. DSDT fix is in bug 5966.
1425                  * 2645, 2646 model numbers are shared with 600/600E/600X
1426                  */
1427          .callback = disable_acpi_irq,
1428          .ident = "IBM Thinkpad 600 Series 2645",
1429          .matches = {
1430                      DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1431                      DMI_MATCH(DMI_BOARD_NAME, "2645"),
1432                      },
1433          },
1434         {
1435          .callback = disable_acpi_irq,
1436          .ident = "IBM Thinkpad 600 Series 2646",
1437          .matches = {
1438                      DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1439                      DMI_MATCH(DMI_BOARD_NAME, "2646"),
1440                      },
1441          },
1442         /*
1443          * Boxes that need ACPI PCI IRQ routing and PCI scan disabled
1444          */
1445         {                       /* _BBN 0 bug */
1446          .callback = disable_acpi_pci,
1447          .ident = "ASUS PR-DLS",
1448          .matches = {
1449                      DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1450                      DMI_MATCH(DMI_BOARD_NAME, "PR-DLS"),
1451                      DMI_MATCH(DMI_BIOS_VERSION,
1452                                "ASUS PR-DLS ACPI BIOS Revision 1010"),
1453                      DMI_MATCH(DMI_BIOS_DATE, "03/21/2003")
1454                      },
1455          },
1456         {
1457          .callback = disable_acpi_pci,
1458          .ident = "Acer TravelMate 36x Laptop",
1459          .matches = {
1460                      DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
1461                      DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"),
1462                      },
1463          },
1464         {}
1465 };
1466
1467 /* second table for DMI checks that should run after early-quirks */
1468 static struct dmi_system_id __initdata acpi_dmi_table_late[] = {
1469         /*
1470          * HP laptops which use a DSDT reporting as HP/SB400/10000,
1471          * which includes some code which overrides all temperature
1472          * trip points to 16C if the INTIN2 input of the I/O APIC
1473          * is enabled.  This input is incorrectly designated the
1474          * ISA IRQ 0 via an interrupt source override even though
1475          * it is wired to the output of the master 8259A and INTIN0
1476          * is not connected at all.  Force ignoring BIOS IRQ0 pin2
1477          * override in that cases.
1478          */
1479         {
1480          .callback = dmi_ignore_irq0_timer_override,
1481          .ident = "HP nx6115 laptop",
1482          .matches = {
1483                      DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1484                      DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6115"),
1485                      },
1486          },
1487         {
1488          .callback = dmi_ignore_irq0_timer_override,
1489          .ident = "HP NX6125 laptop",
1490          .matches = {
1491                      DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1492                      DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6125"),
1493                      },
1494          },
1495         {
1496          .callback = dmi_ignore_irq0_timer_override,
1497          .ident = "HP NX6325 laptop",
1498          .matches = {
1499                      DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1500                      DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6325"),
1501                      },
1502          },
1503         {
1504          .callback = dmi_ignore_irq0_timer_override,
1505          .ident = "HP 6715b laptop",
1506          .matches = {
1507                      DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1508                      DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq 6715b"),
1509                      },
1510          },
1511         {}
1512 };
1513
1514 /*
1515  * acpi_boot_table_init() and acpi_boot_init()
1516  *  called from setup_arch(), always.
1517  *      1. checksums all tables
1518  *      2. enumerates lapics
1519  *      3. enumerates io-apics
1520  *
1521  * acpi_table_init() is separate to allow reading SRAT without
1522  * other side effects.
1523  *
1524  * side effects of acpi_boot_init:
1525  *      acpi_lapic = 1 if LAPIC found
1526  *      acpi_ioapic = 1 if IOAPIC found
1527  *      if (acpi_lapic && acpi_ioapic) smp_found_config = 1;
1528  *      if acpi_blacklisted() acpi_disabled = 1;
1529  *      acpi_irq_model=...
1530  *      ...
1531  *
1532  * return value: (currently ignored)
1533  *      0: success
1534  *      !0: failure
1535  */
1536
1537 int __init acpi_boot_table_init(void)
1538 {
1539         int error;
1540
1541         dmi_check_system(acpi_dmi_table);
1542
1543         /*
1544          * If acpi_disabled, bail out
1545          * One exception: acpi=ht continues far enough to enumerate LAPICs
1546          */
1547         if (acpi_disabled && !acpi_ht)
1548                 return 1;
1549
1550         /*
1551          * Initialize the ACPI boot-time table parser.
1552          */
1553         error = acpi_table_init();
1554         if (error) {
1555                 disable_acpi();
1556                 return error;
1557         }
1558
1559         acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1560
1561         /*
1562          * blacklist may disable ACPI entirely
1563          */
1564         error = acpi_blacklisted();
1565         if (error) {
1566                 if (acpi_force) {
1567                         printk(KERN_WARNING PREFIX "acpi=force override\n");
1568                 } else {
1569                         printk(KERN_WARNING PREFIX "Disabling ACPI support\n");
1570                         disable_acpi();
1571                         return error;
1572                 }
1573         }
1574
1575         return 0;
1576 }
1577
1578 int __init early_acpi_boot_init(void)
1579 {
1580         /*
1581          * If acpi_disabled, bail out
1582          * One exception: acpi=ht continues far enough to enumerate LAPICs
1583          */
1584         if (acpi_disabled && !acpi_ht)
1585                 return 1;
1586
1587         /*
1588          * Process the Multiple APIC Description Table (MADT), if present
1589          */
1590         early_acpi_process_madt();
1591
1592         return 0;
1593 }
1594
1595 int __init acpi_boot_init(void)
1596 {
1597         /* those are executed after early-quirks are executed */
1598         dmi_check_system(acpi_dmi_table_late);
1599
1600         /*
1601          * If acpi_disabled, bail out
1602          * One exception: acpi=ht continues far enough to enumerate LAPICs
1603          */
1604         if (acpi_disabled && !acpi_ht)
1605                 return 1;
1606
1607         acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1608
1609         /*
1610          * set sci_int and PM timer address
1611          */
1612         acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt);
1613
1614         /*
1615          * Process the Multiple APIC Description Table (MADT), if present
1616          */
1617         acpi_process_madt();
1618
1619         acpi_table_parse(ACPI_SIG_HPET, acpi_parse_hpet);
1620
1621         return 0;
1622 }
1623
1624 static int __init parse_acpi(char *arg)
1625 {
1626         if (!arg)
1627                 return -EINVAL;
1628
1629         /* "acpi=off" disables both ACPI table parsing and interpreter */
1630         if (strcmp(arg, "off") == 0) {
1631                 disable_acpi();
1632         }
1633         /* acpi=force to over-ride black-list */
1634         else if (strcmp(arg, "force") == 0) {
1635                 acpi_force = 1;
1636                 acpi_ht = 1;
1637                 acpi_disabled = 0;
1638         }
1639         /* acpi=strict disables out-of-spec workarounds */
1640         else if (strcmp(arg, "strict") == 0) {
1641                 acpi_strict = 1;
1642         }
1643         /* Limit ACPI just to boot-time to enable HT */
1644         else if (strcmp(arg, "ht") == 0) {
1645                 if (!acpi_force)
1646                         disable_acpi();
1647                 acpi_ht = 1;
1648         }
1649         /* acpi=rsdt use RSDT instead of XSDT */
1650         else if (strcmp(arg, "rsdt") == 0) {
1651                 acpi_rsdt_forced = 1;
1652         }
1653         /* "acpi=noirq" disables ACPI interrupt routing */
1654         else if (strcmp(arg, "noirq") == 0) {
1655                 acpi_noirq_set();
1656         } else {
1657                 /* Core will printk when we return error. */
1658                 return -EINVAL;
1659         }
1660         return 0;
1661 }
1662 early_param("acpi", parse_acpi);
1663
1664 /* FIXME: Using pci= for an ACPI parameter is a travesty. */
1665 static int __init parse_pci(char *arg)
1666 {
1667         if (arg && strcmp(arg, "noacpi") == 0)
1668                 acpi_disable_pci();
1669         return 0;
1670 }
1671 early_param("pci", parse_pci);
1672
1673 int __init acpi_mps_check(void)
1674 {
1675 #if defined(CONFIG_X86_LOCAL_APIC) && !defined(CONFIG_X86_MPPARSE)
1676 /* mptable code is not built-in*/
1677         if (acpi_disabled || acpi_noirq) {
1678                 printk(KERN_WARNING "MPS support code is not built-in.\n"
1679                        "Using acpi=off or acpi=noirq or pci=noacpi "
1680                        "may have problem\n");
1681                 return 1;
1682         }
1683 #endif
1684         return 0;
1685 }
1686
1687 #ifdef CONFIG_X86_IO_APIC
1688 static int __init parse_acpi_skip_timer_override(char *arg)
1689 {
1690         acpi_skip_timer_override = 1;
1691         return 0;
1692 }
1693 early_param("acpi_skip_timer_override", parse_acpi_skip_timer_override);
1694
1695 static int __init parse_acpi_use_timer_override(char *arg)
1696 {
1697         acpi_use_timer_override = 1;
1698         return 0;
1699 }
1700 early_param("acpi_use_timer_override", parse_acpi_use_timer_override);
1701 #endif /* CONFIG_X86_IO_APIC */
1702
1703 static int __init setup_acpi_sci(char *s)
1704 {
1705         if (!s)
1706                 return -EINVAL;
1707         if (!strcmp(s, "edge"))
1708                 acpi_sci_flags =  ACPI_MADT_TRIGGER_EDGE |
1709                         (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1710         else if (!strcmp(s, "level"))
1711                 acpi_sci_flags = ACPI_MADT_TRIGGER_LEVEL |
1712                         (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1713         else if (!strcmp(s, "high"))
1714                 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_HIGH |
1715                         (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1716         else if (!strcmp(s, "low"))
1717                 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_LOW |
1718                         (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1719         else
1720                 return -EINVAL;
1721         return 0;
1722 }
1723 early_param("acpi_sci", setup_acpi_sci);
1724
1725 int __acpi_acquire_global_lock(unsigned int *lock)
1726 {
1727         unsigned int old, new, val;
1728         do {
1729                 old = *lock;
1730                 new = (((old & ~0x3) + 2) + ((old >> 1) & 0x1));
1731                 val = cmpxchg(lock, old, new);
1732         } while (unlikely (val != old));
1733         return (new < 3) ? -1 : 0;
1734 }
1735
1736 int __acpi_release_global_lock(unsigned int *lock)
1737 {
1738         unsigned int old, new, val;
1739         do {
1740                 old = *lock;
1741                 new = old & ~0x3;
1742                 val = cmpxchg(lock, old, new);
1743         } while (unlikely (val != old));
1744         return old & 0x1;
1745 }