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         hpet_blockid = hpet_tbl->sequence;
 628
 629         /*
 630          * Some broken BIOSes advertise HPET at 0x0. We really do not
 631          * want to allocate a resource there.
 632          */
 633         if (!hpet_address) {
 634                 printk(KERN_WARNING PREFIX
 635                        "HPET id: %#x base: %#lx is invalid\n",
 636                        hpet_tbl->id, hpet_address);
 637                 return 0;
 638         }
 639 #ifdef CONFIG_X86_64
 640         /*
 641          * Some even more broken BIOSes advertise HPET at
 642          * 0xfed0000000000000 instead of 0xfed00000. Fix it up and add
 643          * some noise:
 644          */
 645         if (hpet_address == 0xfed0000000000000UL) {
 646                 if (!hpet_force_user) {
 647                         printk(KERN_WARNING PREFIX "HPET id: %#x "
 648                                "base: 0xfed0000000000000 is bogus\n "
 649                                "try hpet=force on the kernel command line to "
 650                                "fix it up to 0xfed00000.\n", hpet_tbl->id);
 651                         hpet_address = 0;
 652                         return 0;
 653                 }
 654                 printk(KERN_WARNING PREFIX
 655                        "HPET id: %#x base: 0xfed0000000000000 fixed up "
 656                        "to 0xfed00000.\n", hpet_tbl->id);
 657                 hpet_address >>= 32;
 658         }
 659 #endif
 660         printk(KERN_INFO PREFIX "HPET id: %#x base: %#lx\n",
 661                hpet_tbl->id, hpet_address);
 662
 663         /*
 664          * Allocate and initialize the HPET firmware resource for adding into
 665          * the resource tree during the lateinit timeframe.
 666          */
 667 #define HPET_RESOURCE_NAME_SIZE 9
 668         hpet_res = alloc_bootmem(sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE);
 669
 670         hpet_res->name = (void *)&hpet_res[1];
 671         hpet_res->flags = IORESOURCE_MEM;
 672         snprintf((char *)hpet_res->name, HPET_RESOURCE_NAME_SIZE, "HPET %u",
 673                  hpet_tbl->sequence);
 674
 675         hpet_res->start = hpet_address;
 676         hpet_res->end = hpet_address + (1 * 1024) - 1;
 677
 678         return 0;
 679 }
 680
 681 /*
 682  * hpet_insert_resource inserts the HPET resources used into the resource
 683  * tree.
 684  */
 685 static __init int hpet_insert_resource(void)
 686 {
 687         if (!hpet_res)
 688                 return 1;
 689
 690         return insert_resource(&iomem_resource, hpet_res);
 691 }
 692
 693 late_initcall(hpet_insert_resource);
 694
 695 #else
 696 #define acpi_parse_hpet NULL
 697 #endif
 698
 699 static int __init acpi_parse_fadt(struct acpi_table_header *table)
 700 {
 701
 702 #ifdef CONFIG_X86_PM_TIMER
 703         /* detect the location of the ACPI PM Timer */
 704         if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID) {
 705                 /* FADT rev. 2 */
 706                 if (acpi_gbl_FADT.xpm_timer_block.space_id !=
 707                     ACPI_ADR_SPACE_SYSTEM_IO)
 708                         return 0;
 709
 710                 pmtmr_ioport = acpi_gbl_FADT.xpm_timer_block.address;
 711                 /*
 712                  * "X" fields are optional extensions to the original V1.0
 713                  * fields, so we must selectively expand V1.0 fields if the
 714                  * corresponding X field is zero.
 715                  */
 716                 if (!pmtmr_ioport)
 717                         pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
 718         } else {
 719                 /* FADT rev. 1 */
 720                 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
 721         }
 722         if (pmtmr_ioport)
 723                 printk(KERN_INFO PREFIX "PM-Timer IO Port: %#x\n",
 724                        pmtmr_ioport);
 725 #endif
 726         return 0;
 727 }
 728
 729 #ifdef  CONFIG_X86_LOCAL_APIC
 730 /*
 731  * Parse LAPIC entries in MADT
 732  * returns 0 on success, < 0 on error
 733  */
 734
 735 static void __init acpi_register_lapic_address(unsigned long address)
 736 {
 737         mp_lapic_addr = address;
 738
 739         set_fixmap_nocache(FIX_APIC_BASE, address);
 740         if (boot_cpu_physical_apicid == -1U) {
 741                 boot_cpu_physical_apicid  = read_apic_id();
 742                 apic_version[boot_cpu_physical_apicid] =
 743                          GET_APIC_VERSION(apic_read(APIC_LVR));
 744         }
 745 }
 746
 747 static int __init early_acpi_parse_madt_lapic_addr_ovr(void)
 748 {
 749         int count;
 750
 751         if (!cpu_has_apic)
 752                 return -ENODEV;
 753
 754         /*
 755          * Note that the LAPIC address is obtained from the MADT (32-bit value)
 756          * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value).
 757          */
 758
 759         count =
 760             acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
 761                                   acpi_parse_lapic_addr_ovr, 0);
 762         if (count < 0) {
 763                 printk(KERN_ERR PREFIX
 764                        "Error parsing LAPIC address override entry\n");
 765                 return count;
 766         }
 767
 768         acpi_register_lapic_address(acpi_lapic_addr);
 769
 770         return count;
 771 }
 772
 773 static int __init acpi_parse_madt_lapic_entries(void)
 774 {
 775         int count;
 776         int x2count = 0;
 777
 778         if (!cpu_has_apic)
 779                 return -ENODEV;
 780
 781         /*
 782          * Note that the LAPIC address is obtained from the MADT (32-bit value)
 783          * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value).
 784          */
 785
 786         count =
 787             acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
 788                                   acpi_parse_lapic_addr_ovr, 0);
 789         if (count < 0) {
 790                 printk(KERN_ERR PREFIX
 791                        "Error parsing LAPIC address override entry\n");
 792                 return count;
 793         }
 794
 795         acpi_register_lapic_address(acpi_lapic_addr);
 796
 797         count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC,
 798                                       acpi_parse_sapic, MAX_APICS);
 799
 800         if (!count) {
 801                 x2count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC,
 802                                                 acpi_parse_x2apic, MAX_APICS);
 803                 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC,
 804                                               acpi_parse_lapic, MAX_APICS);
 805         }
 806         if (!count && !x2count) {
 807                 printk(KERN_ERR PREFIX "No LAPIC entries present\n");
 808                 /* TBD: Cleanup to allow fallback to MPS */
 809                 return -ENODEV;
 810         } else if (count < 0 || x2count < 0) {
 811                 printk(KERN_ERR PREFIX "Error parsing LAPIC entry\n");
 812                 /* TBD: Cleanup to allow fallback to MPS */
 813                 return count;
 814         }
 815
 816         x2count =
 817             acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC_NMI,
 818                                   acpi_parse_x2apic_nmi, 0);
 819         count =
 820             acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI, acpi_parse_lapic_nmi, 0);
 821         if (count < 0 || x2count < 0) {
 822                 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n");
 823                 /* TBD: Cleanup to allow fallback to MPS */
 824                 return count;
 825         }
 826         return 0;
 827 }
 828 #endif                          /* CONFIG_X86_LOCAL_APIC */
 829
 830 #ifdef  CONFIG_X86_IO_APIC
 831 #define MP_ISA_BUS              0
 832
 833 #ifdef CONFIG_X86_ES7000
 834 extern int es7000_plat;
 835 #endif
 836
 837 int __init acpi_probe_gsi(void)
 838 {
 839         int idx;
 840         int gsi;
 841         int max_gsi = 0;
 842
 843         if (acpi_disabled)
 844                 return 0;
 845
 846         if (!acpi_ioapic)
 847                 return 0;
 848
 849         max_gsi = 0;
 850         for (idx = 0; idx < nr_ioapics; idx++) {
 851                 gsi = mp_gsi_routing[idx].gsi_end;
 852
 853                 if (gsi > max_gsi)
 854                         max_gsi = gsi;
 855         }
 856
 857         return max_gsi + 1;
 858 }
 859
 860 static void assign_to_mp_irq(struct mpc_intsrc *m,
 861                                     struct mpc_intsrc *mp_irq)
 862 {
 863         memcpy(mp_irq, m, sizeof(struct mpc_intsrc));
 864 }
 865
 866 static int mp_irq_cmp(struct mpc_intsrc *mp_irq,
 867                                 struct mpc_intsrc *m)
 868 {
 869         return memcmp(mp_irq, m, sizeof(struct mpc_intsrc));
 870 }
 871
 872 static void save_mp_irq(struct mpc_intsrc *m)
 873 {
 874         int i;
 875
 876         for (i = 0; i < mp_irq_entries; i++) {
 877                 if (!mp_irq_cmp(&mp_irqs[i], m))
 878                         return;
 879         }
 880
 881         assign_to_mp_irq(m, &mp_irqs[mp_irq_entries]);
 882         if (++mp_irq_entries == MAX_IRQ_SOURCES)
 883                 panic("Max # of irq sources exceeded!!\n");
 884 }
 885
 886 void __init mp_override_legacy_irq(u8 bus_irq, u8 polarity, u8 trigger, u32 gsi)
 887 {
 888         int ioapic;
 889         int pin;
 890         struct mpc_intsrc mp_irq;
 891
 892         /*
 893          * Convert 'gsi' to 'ioapic.pin'.
 894          */
 895         ioapic = mp_find_ioapic(gsi);
 896         if (ioapic < 0)
 897                 return;
 898         pin = mp_find_ioapic_pin(ioapic, gsi);
 899
 900         /*
 901          * TBD: This check is for faulty timer entries, where the override
 902          *      erroneously sets the trigger to level, resulting in a HUGE
 903          *      increase of timer interrupts!
 904          */
 905         if ((bus_irq == 0) && (trigger == 3))
 906                 trigger = 1;
 907
 908         mp_irq.type = MP_INTSRC;
 909         mp_irq.irqtype = mp_INT;
 910         mp_irq.irqflag = (trigger << 2) | polarity;
 911         mp_irq.srcbus = MP_ISA_BUS;
 912         mp_irq.srcbusirq = bus_irq;     /* IRQ */
 913         mp_irq.dstapic = mp_ioapics[ioapic].apicid; /* APIC ID */
 914         mp_irq.dstirq = pin;    /* INTIN# */
 915
 916         save_mp_irq(&mp_irq);
 917 }
 918
 919 void __init mp_config_acpi_legacy_irqs(void)
 920 {
 921         int i;
 922         int ioapic;
 923         unsigned int dstapic;
 924         struct mpc_intsrc mp_irq;
 925
 926 #if defined (CONFIG_MCA) || defined (CONFIG_EISA)
 927         /*
 928          * Fabricate the legacy ISA bus (bus #31).
 929          */
 930         mp_bus_id_to_type[MP_ISA_BUS] = MP_BUS_ISA;
 931 #endif
 932         set_bit(MP_ISA_BUS, mp_bus_not_pci);
 933         pr_debug("Bus #%d is ISA\n", MP_ISA_BUS);
 934
 935 #ifdef CONFIG_X86_ES7000
 936         /*
 937          * Older generations of ES7000 have no legacy identity mappings
 938          */
 939         if (es7000_plat == 1)
 940                 return;
 941 #endif
 942
 943         /*
 944          * Locate the IOAPIC that manages the ISA IRQs (0-15).
 945          */
 946         ioapic = mp_find_ioapic(0);
 947         if (ioapic < 0)
 948                 return;
 949         dstapic = mp_ioapics[ioapic].apicid;
 950
 951         /*
 952          * Use the default configuration for the IRQs 0-15.  Unless
 953          * overridden by (MADT) interrupt source override entries.
 954          */
 955         for (i = 0; i < 16; i++) {
 956                 int idx;
 957
 958                 for (idx = 0; idx < mp_irq_entries; idx++) {
 959                         struct mpc_intsrc *irq = mp_irqs + idx;
 960
 961                         /* Do we already have a mapping for this ISA IRQ? */
 962                         if (irq->srcbus == MP_ISA_BUS && irq->srcbusirq == i)
 963                                 break;
 964
 965                         /* Do we already have a mapping for this IOAPIC pin */
 966                         if (irq->dstapic == dstapic && irq->dstirq == i)
 967                                 break;
 968                 }
 969
 970                 if (idx != mp_irq_entries) {
 971                         printk(KERN_DEBUG "ACPI: IRQ%d used by override.\n", i);
 972                         continue;       /* IRQ already used */
 973                 }
 974
 975                 mp_irq.type = MP_INTSRC;
 976                 mp_irq.irqflag = 0;     /* Conforming */
 977                 mp_irq.srcbus = MP_ISA_BUS;
 978                 mp_irq.dstapic = dstapic;
 979                 mp_irq.irqtype = mp_INT;
 980                 mp_irq.srcbusirq = i; /* Identity mapped */
 981                 mp_irq.dstirq = i;
 982
 983                 save_mp_irq(&mp_irq);
 984         }
 985 }
 986
 987 static int mp_config_acpi_gsi(struct device *dev, u32 gsi, int trigger,
 988                         int polarity)
 989 {
 990 #ifdef CONFIG_X86_MPPARSE
 991         struct mpc_intsrc mp_irq;
 992         struct pci_dev *pdev;
 993         unsigned char number;
 994         unsigned int devfn;
 995         int ioapic;
 996         u8 pin;
 997
 998         if (!acpi_ioapic)
 999                 return 0;
1000         if (!dev)
1001                 return 0;
1002         if (dev->bus != &pci_bus_type)
1003                 return 0;
1004
1005         pdev = to_pci_dev(dev);
1006         number = pdev->bus->number;
1007         devfn = pdev->devfn;
1008         pin = pdev->pin;
1009         /* print the entry should happen on mptable identically */
1010         mp_irq.type = MP_INTSRC;
1011         mp_irq.irqtype = mp_INT;
1012         mp_irq.irqflag = (trigger == ACPI_EDGE_SENSITIVE ? 4 : 0x0c) |
1013                                 (polarity == ACPI_ACTIVE_HIGH ? 1 : 3);
1014         mp_irq.srcbus = number;
1015         mp_irq.srcbusirq = (((devfn >> 3) & 0x1f) << 2) | ((pin - 1) & 3);
1016         ioapic = mp_find_ioapic(gsi);
1017         mp_irq.dstapic = mp_ioapics[ioapic].apicid;
1018         mp_irq.dstirq = mp_find_ioapic_pin(ioapic, gsi);
1019
1020         save_mp_irq(&mp_irq);
1021 #endif
1022         return 0;
1023 }
1024
1025 int mp_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity)
1026 {
1027         int ioapic;
1028         int ioapic_pin;
1029         struct io_apic_irq_attr irq_attr;
1030
1031         if (acpi_irq_model != ACPI_IRQ_MODEL_IOAPIC)
1032                 return gsi;
1033
1034         /* Don't set up the ACPI SCI because it's already set up */
1035         if (acpi_gbl_FADT.sci_interrupt == gsi)
1036                 return gsi;
1037
1038         ioapic = mp_find_ioapic(gsi);
1039         if (ioapic < 0) {
1040                 printk(KERN_WARNING "No IOAPIC for GSI %u\n", gsi);
1041                 return gsi;
1042         }
1043
1044         ioapic_pin = mp_find_ioapic_pin(ioapic, gsi);
1045
1046 #ifdef CONFIG_X86_32
1047         if (ioapic_renumber_irq)
1048                 gsi = ioapic_renumber_irq(ioapic, gsi);
1049 #endif
1050
1051         if (ioapic_pin > MP_MAX_IOAPIC_PIN) {
1052                 printk(KERN_ERR "Invalid reference to IOAPIC pin "
1053                        "%d-%d\n", mp_ioapics[ioapic].apicid,
1054                        ioapic_pin);
1055                 return gsi;
1056         }
1057
1058         if (enable_update_mptable)
1059                 mp_config_acpi_gsi(dev, gsi, trigger, polarity);
1060
1061         set_io_apic_irq_attr(&irq_attr, ioapic, ioapic_pin,
1062                              trigger == ACPI_EDGE_SENSITIVE ? 0 : 1,
1063                              polarity == ACPI_ACTIVE_HIGH ? 0 : 1);
1064         io_apic_set_pci_routing(dev, gsi, &irq_attr);
1065
1066         return gsi;
1067 }
1068
1069 /*
1070  * Parse IOAPIC related entries in MADT
1071  * returns 0 on success, < 0 on error
1072  */
1073 static int __init acpi_parse_madt_ioapic_entries(void)
1074 {
1075         int count;
1076
1077         /*
1078          * ACPI interpreter is required to complete interrupt setup,
1079          * so if it is off, don't enumerate the io-apics with ACPI.
1080          * If MPS is present, it will handle them,
1081          * otherwise the system will stay in PIC mode
1082          */
1083         if (acpi_disabled || acpi_noirq)
1084                 return -ENODEV;
1085
1086         if (!cpu_has_apic)
1087                 return -ENODEV;
1088
1089         /*
1090          * if "noapic" boot option, don't look for IO-APICs
1091          */
1092         if (skip_ioapic_setup) {
1093                 printk(KERN_INFO PREFIX "Skipping IOAPIC probe "
1094                        "due to 'noapic' option.\n");
1095                 return -ENODEV;
1096         }
1097
1098         count =
1099             acpi_table_parse_madt(ACPI_MADT_TYPE_IO_APIC, acpi_parse_ioapic,
1100                                   MAX_IO_APICS);
1101         if (!count) {
1102                 printk(KERN_ERR PREFIX "No IOAPIC entries present\n");
1103                 return -ENODEV;
1104         } else if (count < 0) {
1105                 printk(KERN_ERR PREFIX "Error parsing IOAPIC entry\n");
1106                 return count;
1107         }
1108
1109         count =
1110             acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE, acpi_parse_int_src_ovr,
1111                                   nr_irqs);
1112         if (count < 0) {
1113                 printk(KERN_ERR PREFIX
1114                        "Error parsing interrupt source overrides entry\n");
1115                 /* TBD: Cleanup to allow fallback to MPS */
1116                 return count;
1117         }
1118
1119         /*
1120          * If BIOS did not supply an INT_SRC_OVR for the SCI
1121          * pretend we got one so we can set the SCI flags.
1122          */
1123         if (!acpi_sci_override_gsi)
1124                 acpi_sci_ioapic_setup(acpi_gbl_FADT.sci_interrupt, 0, 0);
1125
1126         /* Fill in identity legacy mappings where no override */
1127         mp_config_acpi_legacy_irqs();
1128
1129         count =
1130             acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE, acpi_parse_nmi_src,
1131                                   nr_irqs);
1132         if (count < 0) {
1133                 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n");
1134                 /* TBD: Cleanup to allow fallback to MPS */
1135                 return count;
1136         }
1137
1138         return 0;
1139 }
1140 #else
1141 static inline int acpi_parse_madt_ioapic_entries(void)
1142 {
1143         return -1;
1144 }
1145 #endif  /* !CONFIG_X86_IO_APIC */
1146
1147 static void __init early_acpi_process_madt(void)
1148 {
1149 #ifdef CONFIG_X86_LOCAL_APIC
1150         int error;
1151
1152         if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1153
1154                 /*
1155                  * Parse MADT LAPIC entries
1156                  */
1157                 error = early_acpi_parse_madt_lapic_addr_ovr();
1158                 if (!error) {
1159                         acpi_lapic = 1;
1160                         smp_found_config = 1;
1161                 }
1162                 if (error == -EINVAL) {
1163                         /*
1164                          * Dell Precision Workstation 410, 610 come here.
1165                          */
1166                         printk(KERN_ERR PREFIX
1167                                "Invalid BIOS MADT, disabling ACPI\n");
1168                         disable_acpi();
1169                 }
1170         }
1171 #endif
1172 }
1173
1174 static void __init acpi_process_madt(void)
1175 {
1176 #ifdef CONFIG_X86_LOCAL_APIC
1177         int error;
1178
1179         if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1180
1181                 /*
1182                  * Parse MADT LAPIC entries
1183                  */
1184                 error = acpi_parse_madt_lapic_entries();
1185                 if (!error) {
1186                         acpi_lapic = 1;
1187
1188 #ifdef CONFIG_X86_BIGSMP
1189                         generic_bigsmp_probe();
1190 #endif
1191                         /*
1192                          * Parse MADT IO-APIC entries
1193                          */
1194                         error = acpi_parse_madt_ioapic_entries();
1195                         if (!error) {
1196                                 acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC;
1197                                 acpi_ioapic = 1;
1198
1199                                 smp_found_config = 1;
1200                                 if (apic->setup_apic_routing)
1201                                         apic->setup_apic_routing();
1202                         }
1203                 }
1204                 if (error == -EINVAL) {
1205                         /*
1206                          * Dell Precision Workstation 410, 610 come here.
1207                          */
1208                         printk(KERN_ERR PREFIX
1209                                "Invalid BIOS MADT, disabling ACPI\n");
1210                         disable_acpi();
1211                 }
1212         } else {
1213                 /*
1214                  * ACPI found no MADT, and so ACPI wants UP PIC mode.
1215                  * In the event an MPS table was found, forget it.
1216                  * Boot with "acpi=off" to use MPS on such a system.
1217                  */
1218                 if (smp_found_config) {
1219                         printk(KERN_WARNING PREFIX
1220                                 "No APIC-table, disabling MPS\n");
1221                         smp_found_config = 0;
1222                 }
1223         }
1224
1225         /*
1226          * ACPI supports both logical (e.g. Hyper-Threading) and physical
1227          * processors, where MPS only supports physical.
1228          */
1229         if (acpi_lapic && acpi_ioapic)
1230                 printk(KERN_INFO "Using ACPI (MADT) for SMP configuration "
1231                        "information\n");
1232         else if (acpi_lapic)
1233                 printk(KERN_INFO "Using ACPI for processor (LAPIC) "
1234                        "configuration information\n");
1235 #endif
1236         return;
1237 }
1238
1239 static int __init disable_acpi_irq(const struct dmi_system_id *d)
1240 {
1241         if (!acpi_force) {
1242                 printk(KERN_NOTICE "%s detected: force use of acpi=noirq\n",
1243                        d->ident);
1244                 acpi_noirq_set();
1245         }
1246         return 0;
1247 }
1248
1249 static int __init disable_acpi_pci(const struct dmi_system_id *d)
1250 {
1251         if (!acpi_force) {
1252                 printk(KERN_NOTICE "%s detected: force use of pci=noacpi\n",
1253                        d->ident);
1254                 acpi_disable_pci();
1255         }
1256         return 0;
1257 }
1258
1259 static int __init dmi_disable_acpi(const struct dmi_system_id *d)
1260 {
1261         if (!acpi_force) {
1262                 printk(KERN_NOTICE "%s detected: acpi off\n", d->ident);
1263                 disable_acpi();
1264         } else {
1265                 printk(KERN_NOTICE
1266                        "Warning: DMI blacklist says broken, but acpi forced\n");
1267         }
1268         return 0;
1269 }
1270
1271 /*
1272  * Limit ACPI to CPU enumeration for HT
1273  */
1274 static int __init force_acpi_ht(const struct dmi_system_id *d)
1275 {
1276         if (!acpi_force) {
1277                 printk(KERN_NOTICE "%s detected: force use of acpi=ht\n",
1278                        d->ident);
1279                 disable_acpi();
1280                 acpi_ht = 1;
1281         } else {
1282                 printk(KERN_NOTICE
1283                        "Warning: acpi=force overrules DMI blacklist: acpi=ht\n");
1284         }
1285         return 0;
1286 }
1287
1288 /*
1289  * Force ignoring BIOS IRQ0 pin2 override
1290  */
1291 static int __init dmi_ignore_irq0_timer_override(const struct dmi_system_id *d)
1292 {
1293         /*
1294          * The ati_ixp4x0_rev() early PCI quirk should have set
1295          * the acpi_skip_timer_override flag already:
1296          */
1297         if (!acpi_skip_timer_override) {
1298                 WARN(1, KERN_ERR "ati_ixp4x0 quirk not complete.\n");
1299                 pr_notice("%s detected: Ignoring BIOS IRQ0 pin2 override\n",
1300                         d->ident);
1301                 acpi_skip_timer_override = 1;
1302         }
1303         return 0;
1304 }
1305
1306 /*
1307  * If your system is blacklisted here, but you find that acpi=force
1308  * works for you, please contact linux-acpi@vger.kernel.org
1309  */
1310 static struct dmi_system_id __initdata acpi_dmi_table[] = {
1311         /*
1312          * Boxes that need ACPI disabled
1313          */
1314         {
1315          .callback = dmi_disable_acpi,
1316          .ident = "IBM Thinkpad",
1317          .matches = {
1318                      DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1319                      DMI_MATCH(DMI_BOARD_NAME, "2629H1G"),
1320                      },
1321          },
1322
1323         /*
1324          * Boxes that need acpi=ht
1325          */
1326         {
1327          .callback = force_acpi_ht,
1328          .ident = "FSC Primergy T850",
1329          .matches = {
1330                      DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
1331                      DMI_MATCH(DMI_PRODUCT_NAME, "PRIMERGY T850"),
1332                      },
1333          },
1334         {
1335          .callback = force_acpi_ht,
1336          .ident = "HP VISUALIZE NT Workstation",
1337          .matches = {
1338                      DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"),
1339                      DMI_MATCH(DMI_PRODUCT_NAME, "HP VISUALIZE NT Workstation"),
1340                      },
1341          },
1342         {
1343          .callback = force_acpi_ht,
1344          .ident = "Compaq Workstation W8000",
1345          .matches = {
1346                      DMI_MATCH(DMI_SYS_VENDOR, "Compaq"),
1347                      DMI_MATCH(DMI_PRODUCT_NAME, "Workstation W8000"),
1348                      },
1349          },
1350         {
1351          .callback = force_acpi_ht,
1352          .ident = "ASUS P2B-DS",
1353          .matches = {
1354                      DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1355                      DMI_MATCH(DMI_BOARD_NAME, "P2B-DS"),
1356                      },
1357          },
1358         {
1359          .callback = force_acpi_ht,
1360          .ident = "ASUS CUR-DLS",
1361          .matches = {
1362                      DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1363                      DMI_MATCH(DMI_BOARD_NAME, "CUR-DLS"),
1364                      },
1365          },
1366         {
1367          .callback = force_acpi_ht,
1368          .ident = "ABIT i440BX-W83977",
1369          .matches = {
1370                      DMI_MATCH(DMI_BOARD_VENDOR, "ABIT <http://www.abit.com>"),
1371                      DMI_MATCH(DMI_BOARD_NAME, "i440BX-W83977 (BP6)"),
1372                      },
1373          },
1374         {
1375          .callback = force_acpi_ht,
1376          .ident = "IBM Bladecenter",
1377          .matches = {
1378                      DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1379                      DMI_MATCH(DMI_BOARD_NAME, "IBM eServer BladeCenter HS20"),
1380                      },
1381          },
1382         {
1383          .callback = force_acpi_ht,
1384          .ident = "IBM eServer xSeries 360",
1385          .matches = {
1386                      DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1387                      DMI_MATCH(DMI_BOARD_NAME, "eServer xSeries 360"),
1388                      },
1389          },
1390         {
1391          .callback = force_acpi_ht,
1392          .ident = "IBM eserver xSeries 330",
1393          .matches = {
1394                      DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1395                      DMI_MATCH(DMI_BOARD_NAME, "eserver xSeries 330"),
1396                      },
1397          },
1398         {
1399          .callback = force_acpi_ht,
1400          .ident = "IBM eserver xSeries 440",
1401          .matches = {
1402                      DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1403                      DMI_MATCH(DMI_PRODUCT_NAME, "eserver xSeries 440"),
1404                      },
1405          },
1406
1407         /*
1408          * Boxes that need ACPI PCI IRQ routing disabled
1409          */
1410         {
1411          .callback = disable_acpi_irq,
1412          .ident = "ASUS A7V",
1413          .matches = {
1414                      DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC"),
1415                      DMI_MATCH(DMI_BOARD_NAME, "<A7V>"),
1416                      /* newer BIOS, Revision 1011, does work */
1417                      DMI_MATCH(DMI_BIOS_VERSION,
1418                                "ASUS A7V ACPI BIOS Revision 1007"),
1419                      },
1420          },
1421         {
1422                 /*
1423                  * Latest BIOS for IBM 600E (1.16) has bad pcinum
1424                  * for LPC bridge, which is needed for the PCI
1425                  * interrupt links to work. DSDT fix is in bug 5966.
1426                  * 2645, 2646 model numbers are shared with 600/600E/600X
1427                  */
1428          .callback = disable_acpi_irq,
1429          .ident = "IBM Thinkpad 600 Series 2645",
1430          .matches = {
1431                      DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1432                      DMI_MATCH(DMI_BOARD_NAME, "2645"),
1433                      },
1434          },
1435         {
1436          .callback = disable_acpi_irq,
1437          .ident = "IBM Thinkpad 600 Series 2646",
1438          .matches = {
1439                      DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1440                      DMI_MATCH(DMI_BOARD_NAME, "2646"),
1441                      },
1442          },
1443         /*
1444          * Boxes that need ACPI PCI IRQ routing and PCI scan disabled
1445          */
1446         {                       /* _BBN 0 bug */
1447          .callback = disable_acpi_pci,
1448          .ident = "ASUS PR-DLS",
1449          .matches = {
1450                      DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1451                      DMI_MATCH(DMI_BOARD_NAME, "PR-DLS"),
1452                      DMI_MATCH(DMI_BIOS_VERSION,
1453                                "ASUS PR-DLS ACPI BIOS Revision 1010"),
1454                      DMI_MATCH(DMI_BIOS_DATE, "03/21/2003")
1455                      },
1456          },
1457         {
1458          .callback = disable_acpi_pci,
1459          .ident = "Acer TravelMate 36x Laptop",
1460          .matches = {
1461                      DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
1462                      DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"),
1463                      },
1464          },
1465         {}
1466 };
1467
1468 /* second table for DMI checks that should run after early-quirks */
1469 static struct dmi_system_id __initdata acpi_dmi_table_late[] = {
1470         /*
1471          * HP laptops which use a DSDT reporting as HP/SB400/10000,
1472          * which includes some code which overrides all temperature
1473          * trip points to 16C if the INTIN2 input of the I/O APIC
1474          * is enabled.  This input is incorrectly designated the
1475          * ISA IRQ 0 via an interrupt source override even though
1476          * it is wired to the output of the master 8259A and INTIN0
1477          * is not connected at all.  Force ignoring BIOS IRQ0 pin2
1478          * override in that cases.
1479          */
1480         {
1481          .callback = dmi_ignore_irq0_timer_override,
1482          .ident = "HP nx6115 laptop",
1483          .matches = {
1484                      DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1485                      DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6115"),
1486                      },
1487          },
1488         {
1489          .callback = dmi_ignore_irq0_timer_override,
1490          .ident = "HP NX6125 laptop",
1491          .matches = {
1492                      DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1493                      DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6125"),
1494                      },
1495          },
1496         {
1497          .callback = dmi_ignore_irq0_timer_override,
1498          .ident = "HP NX6325 laptop",
1499          .matches = {
1500                      DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1501                      DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6325"),
1502                      },
1503          },
1504         {
1505          .callback = dmi_ignore_irq0_timer_override,
1506          .ident = "HP 6715b laptop",
1507          .matches = {
1508                      DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1509                      DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq 6715b"),
1510                      },
1511          },
1512         {}
1513 };
1514
1515 /*
1516  * acpi_boot_table_init() and acpi_boot_init()
1517  *  called from setup_arch(), always.
1518  *      1. checksums all tables
1519  *      2. enumerates lapics
1520  *      3. enumerates io-apics
1521  *
1522  * acpi_table_init() is separate to allow reading SRAT without
1523  * other side effects.
1524  *
1525  * side effects of acpi_boot_init:
1526  *      acpi_lapic = 1 if LAPIC found
1527  *      acpi_ioapic = 1 if IOAPIC found
1528  *      if (acpi_lapic && acpi_ioapic) smp_found_config = 1;
1529  *      if acpi_blacklisted() acpi_disabled = 1;
1530  *      acpi_irq_model=...
1531  *      ...
1532  */
1533
1534 void __init acpi_boot_table_init(void)
1535 {
1536         dmi_check_system(acpi_dmi_table);
1537
1538         /*
1539          * If acpi_disabled, bail out
1540          * One exception: acpi=ht continues far enough to enumerate LAPICs
1541          */
1542         if (acpi_disabled && !acpi_ht)
1543                 return;
1544
1545         /*
1546          * Initialize the ACPI boot-time table parser.
1547          */
1548         if (acpi_table_init()) {
1549                 disable_acpi();
1550                 return;
1551         }
1552
1553         acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1554
1555         /*
1556          * blacklist may disable ACPI entirely
1557          */
1558         if (acpi_blacklisted()) {
1559                 if (acpi_force) {
1560                         printk(KERN_WARNING PREFIX "acpi=force override\n");
1561                 } else {
1562                         printk(KERN_WARNING PREFIX "Disabling ACPI support\n");
1563                         disable_acpi();
1564                         return;
1565                 }
1566         }
1567 }
1568
1569 int __init early_acpi_boot_init(void)
1570 {
1571         /*
1572          * If acpi_disabled, bail out
1573          * One exception: acpi=ht continues far enough to enumerate LAPICs
1574          */
1575         if (acpi_disabled && !acpi_ht)
1576                 return 1;
1577
1578         /*
1579          * Process the Multiple APIC Description Table (MADT), if present
1580          */
1581         early_acpi_process_madt();
1582
1583         return 0;
1584 }
1585
1586 int __init acpi_boot_init(void)
1587 {
1588         /* those are executed after early-quirks are executed */
1589         dmi_check_system(acpi_dmi_table_late);
1590
1591         /*
1592          * If acpi_disabled, bail out
1593          * One exception: acpi=ht continues far enough to enumerate LAPICs
1594          */
1595         if (acpi_disabled && !acpi_ht)
1596                 return 1;
1597
1598         acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1599
1600         /*
1601          * set sci_int and PM timer address
1602          */
1603         acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt);
1604
1605         /*
1606          * Process the Multiple APIC Description Table (MADT), if present
1607          */
1608         acpi_process_madt();
1609
1610         acpi_table_parse(ACPI_SIG_HPET, acpi_parse_hpet);
1611
1612         return 0;
1613 }
1614
1615 static int __init parse_acpi(char *arg)
1616 {
1617         if (!arg)
1618                 return -EINVAL;
1619
1620         /* "acpi=off" disables both ACPI table parsing and interpreter */
1621         if (strcmp(arg, "off") == 0) {
1622                 disable_acpi();
1623         }
1624         /* acpi=force to over-ride black-list */
1625         else if (strcmp(arg, "force") == 0) {
1626                 acpi_force = 1;
1627                 acpi_ht = 1;
1628                 acpi_disabled = 0;
1629         }
1630         /* acpi=strict disables out-of-spec workarounds */
1631         else if (strcmp(arg, "strict") == 0) {
1632                 acpi_strict = 1;
1633         }
1634         /* Limit ACPI just to boot-time to enable HT */
1635         else if (strcmp(arg, "ht") == 0) {
1636                 if (!acpi_force)
1637                         disable_acpi();
1638                 acpi_ht = 1;
1639         }
1640         /* acpi=rsdt use RSDT instead of XSDT */
1641         else if (strcmp(arg, "rsdt") == 0) {
1642                 acpi_rsdt_forced = 1;
1643         }
1644         /* "acpi=noirq" disables ACPI interrupt routing */
1645         else if (strcmp(arg, "noirq") == 0) {
1646                 acpi_noirq_set();
1647         } else {
1648                 /* Core will printk when we return error. */
1649                 return -EINVAL;
1650         }
1651         return 0;
1652 }
1653 early_param("acpi", parse_acpi);
1654
1655 /* FIXME: Using pci= for an ACPI parameter is a travesty. */
1656 static int __init parse_pci(char *arg)
1657 {
1658         if (arg && strcmp(arg, "noacpi") == 0)
1659                 acpi_disable_pci();
1660         return 0;
1661 }
1662 early_param("pci", parse_pci);
1663
1664 int __init acpi_mps_check(void)
1665 {
1666 #if defined(CONFIG_X86_LOCAL_APIC) && !defined(CONFIG_X86_MPPARSE)
1667 /* mptable code is not built-in*/
1668         if (acpi_disabled || acpi_noirq) {
1669                 printk(KERN_WARNING "MPS support code is not built-in.\n"
1670                        "Using acpi=off or acpi=noirq or pci=noacpi "
1671                        "may have problem\n");
1672                 return 1;
1673         }
1674 #endif
1675         return 0;
1676 }
1677
1678 #ifdef CONFIG_X86_IO_APIC
1679 static int __init parse_acpi_skip_timer_override(char *arg)
1680 {
1681         acpi_skip_timer_override = 1;
1682         return 0;
1683 }
1684 early_param("acpi_skip_timer_override", parse_acpi_skip_timer_override);
1685
1686 static int __init parse_acpi_use_timer_override(char *arg)
1687 {
1688         acpi_use_timer_override = 1;
1689         return 0;
1690 }
1691 early_param("acpi_use_timer_override", parse_acpi_use_timer_override);
1692 #endif /* CONFIG_X86_IO_APIC */
1693
1694 static int __init setup_acpi_sci(char *s)
1695 {
1696         if (!s)
1697                 return -EINVAL;
1698         if (!strcmp(s, "edge"))
1699                 acpi_sci_flags =  ACPI_MADT_TRIGGER_EDGE |
1700                         (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1701         else if (!strcmp(s, "level"))
1702                 acpi_sci_flags = ACPI_MADT_TRIGGER_LEVEL |
1703                         (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1704         else if (!strcmp(s, "high"))
1705                 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_HIGH |
1706                         (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1707         else if (!strcmp(s, "low"))
1708                 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_LOW |
1709                         (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1710         else
1711                 return -EINVAL;
1712         return 0;
1713 }
1714 early_param("acpi_sci", setup_acpi_sci);
1715
1716 int __acpi_acquire_global_lock(unsigned int *lock)
1717 {
1718         unsigned int old, new, val;
1719         do {
1720                 old = *lock;
1721                 new = (((old & ~0x3) + 2) + ((old >> 1) & 0x1));
1722                 val = cmpxchg(lock, old, new);
1723         } while (unlikely (val != old));
1724         return (new < 3) ? -1 : 0;
1725 }
1726
1727 int __acpi_release_global_lock(unsigned int *lock)
1728 {
1729         unsigned int old, new, val;
1730         do {
1731                 old = *lock;
1732                 new = old & ~0x3;
1733                 val = cmpxchg(lock, old, new);
1734         } while (unlikely (val != old));
1735         return old & 0x1;
1736 }