arch/x86/kernel/acpi/boot.c

   1 /*
   2  *  boot.c - Architecture-Specific Low-Level ACPI Boot Support
   3  *
   4  *  Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
   5  *  Copyright (C) 2001 Jun Nakajima <jun.nakajima@intel.com>
   6  *
   7  * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   8  *
   9  *  This program is free software; you can redistribute it and/or modify
  10  *  it under the terms of the GNU General Public License as published by
  11  *  the Free Software Foundation; either version 2 of the License, or
  12  *  (at your option) any later version.
  13  *
  14  *  This program is distributed in the hope that it will be useful,
  15  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  *  GNU General Public License for more details.
  18  *
  19  *  You should have received a copy of the GNU General Public License
  20  *  along with this program; if not, write to the Free Software
  21  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  22  *
  23  * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  24  */
  25
  26 #include <linux/init.h>
  27 #include <linux/acpi.h>
  28 #include <linux/acpi_pmtmr.h>
  29 #include <linux/efi.h>
  30 #include <linux/cpumask.h>
  31 #include <linux/module.h>
  32 #include <linux/dmi.h>
  33 #include <linux/irq.h>
  34 #include <linux/slab.h>
  35 #include <linux/bootmem.h>
  36 #include <linux/ioport.h>
  37 #include <linux/pci.h>
  38
  39 #include <asm/pci_x86.h>
  40 #include <asm/pgtable.h>
  41 #include <asm/io_apic.h>
  42 #include <asm/apic.h>
  43 #include <asm/io.h>
  44 #include <asm/mpspec.h>
  45 #include <asm/smp.h>
  46
  47 static int __initdata acpi_force = 0;
  48 u32 acpi_rsdt_forced;
  49 int acpi_disabled;
  50 EXPORT_SYMBOL(acpi_disabled);
  51
  52 #ifdef  CONFIG_X86_64
  53 # include <asm/proto.h>
  54 # include <asm/numa_64.h>
  55 #endif                          /* X86 */
  56
  57 #define BAD_MADT_ENTRY(entry, end) (                                        \
  58                 (!entry) || (unsigned long)entry + sizeof(*entry) > end ||  \
  59                 ((struct acpi_subtable_header *)entry)->length < sizeof(*entry))
  60
  61 #define PREFIX                  "ACPI: "
  62
  63 int acpi_noirq;                         /* skip ACPI IRQ initialization */
  64 int acpi_pci_disabled;          /* skip ACPI PCI scan and IRQ initialization */
  65 EXPORT_SYMBOL(acpi_pci_disabled);
  66 int acpi_ht __initdata = 1;     /* enable HT */
  67
  68 int acpi_lapic;
  69 int acpi_ioapic;
  70 int acpi_strict;
  71
  72 u8 acpi_sci_flags __initdata;
  73 int acpi_sci_override_gsi __initdata;
  74 int acpi_skip_timer_override __initdata;
  75 int acpi_use_timer_override __initdata;
  76
  77 #ifdef CONFIG_X86_LOCAL_APIC
  78 static u64 acpi_lapic_addr __initdata = APIC_DEFAULT_PHYS_BASE;
  79 #endif
  80
  81 #ifndef __HAVE_ARCH_CMPXCHG
  82 #warning ACPI uses CMPXCHG, i486 and later hardware
  83 #endif
  84
  85 /* --------------------------------------------------------------------------
  86                               Boot-time Configuration
  87    -------------------------------------------------------------------------- */
  88
  89 /*
  90  * The default interrupt routing model is PIC (8259).  This gets
  91  * overridden if IOAPICs are enumerated (below).
  92  */
  93 enum acpi_irq_model_id acpi_irq_model = ACPI_IRQ_MODEL_PIC;
  94
  95
  96 /*
  97  * Temporarily use the virtual area starting from FIX_IO_APIC_BASE_END,
  98  * to map the target physical address. The problem is that set_fixmap()
  99  * provides a single page, and it is possible that the page is not
 100  * sufficient.
 101  * By using this area, we can map up to MAX_IO_APICS pages temporarily,
 102  * i.e. until the next __va_range() call.
 103  *
 104  * Important Safety Note:  The fixed I/O APIC page numbers are *subtracted*
 105  * from the fixed base.  That's why we start at FIX_IO_APIC_BASE_END and
 106  * count idx down while incrementing the phys address.
 107  */
 108 char *__init __acpi_map_table(unsigned long phys, unsigned long size)
 109 {
 110
 111         if (!phys || !size)
 112                 return NULL;
 113
 114         return early_ioremap(phys, size);
 115 }
 116 void __init __acpi_unmap_table(char *map, unsigned long size)
 117 {
 118         if (!map || !size)
 119                 return;
 120
 121         early_iounmap(map, size);
 122 }
 123
 124 #ifdef CONFIG_X86_LOCAL_APIC
 125 static int __init acpi_parse_madt(struct acpi_table_header *table)
 126 {
 127         struct acpi_table_madt *madt = NULL;
 128
 129         if (!cpu_has_apic)
 130                 return -EINVAL;
 131
 132         madt = (struct acpi_table_madt *)table;
 133         if (!madt) {
 134                 printk(KERN_WARNING PREFIX "Unable to map MADT\n");
 135                 return -ENODEV;
 136         }
 137
 138         if (madt->address) {
 139                 acpi_lapic_addr = (u64) madt->address;
 140
 141                 printk(KERN_DEBUG PREFIX "Local APIC address 0x%08x\n",
 142                        madt->address);
 143         }
 144
 145         default_acpi_madt_oem_check(madt->header.oem_id,
 146                                     madt->header.oem_table_id);
 147
 148         return 0;
 149 }
 150
 151 static void __cpuinit acpi_register_lapic(int id, u8 enabled)
 152 {
 153         unsigned int ver = 0;
 154
 155         if (!enabled) {
 156                 ++disabled_cpus;
 157                 return;
 158         }
 159
 160         if (boot_cpu_physical_apicid != -1U)
 161                 ver = apic_version[boot_cpu_physical_apicid];
 162
 163         generic_processor_info(id, ver);
 164 }
 165
 166 static int __init
 167 acpi_parse_x2apic(struct acpi_subtable_header *header, const unsigned long end)
 168 {
 169         struct acpi_madt_local_x2apic *processor = NULL;
 170
 171         processor = (struct acpi_madt_local_x2apic *)header;
 172
 173         if (BAD_MADT_ENTRY(processor, end))
 174                 return -EINVAL;
 175
 176         acpi_table_print_madt_entry(header);
 177
 178 #ifdef CONFIG_X86_X2APIC
 179         /*
 180          * We need to register disabled CPU as well to permit
 181          * counting disabled CPUs. This allows us to size
 182          * cpus_possible_map more accurately, to permit
 183          * to not preallocating memory for all NR_CPUS
 184          * when we use CPU hotplug.
 185          */
 186         acpi_register_lapic(processor->local_apic_id,   /* APIC ID */
 187                             processor->lapic_flags & ACPI_MADT_ENABLED);
 188 #else
 189         printk(KERN_WARNING PREFIX "x2apic entry ignored\n");
 190 #endif
 191
 192         return 0;
 193 }
 194
 195 static int __init
 196 acpi_parse_lapic(struct acpi_subtable_header * header, const unsigned long end)
 197 {
 198         struct acpi_madt_local_apic *processor = NULL;
 199
 200         processor = (struct acpi_madt_local_apic *)header;
 201
 202         if (BAD_MADT_ENTRY(processor, end))
 203                 return -EINVAL;
 204
 205         acpi_table_print_madt_entry(header);
 206
 207         /*
 208          * We need to register disabled CPU as well to permit
 209          * counting disabled CPUs. This allows us to size
 210          * cpus_possible_map more accurately, to permit
 211          * to not preallocating memory for all NR_CPUS
 212          * when we use CPU hotplug.
 213          */
 214         acpi_register_lapic(processor->id,      /* APIC ID */
 215                             processor->lapic_flags & ACPI_MADT_ENABLED);
 216
 217         return 0;
 218 }
 219
 220 static int __init
 221 acpi_parse_sapic(struct acpi_subtable_header *header, const unsigned long end)
 222 {
 223         struct acpi_madt_local_sapic *processor = NULL;
 224
 225         processor = (struct acpi_madt_local_sapic *)header;
 226
 227         if (BAD_MADT_ENTRY(processor, end))
 228                 return -EINVAL;
 229
 230         acpi_table_print_madt_entry(header);
 231
 232         acpi_register_lapic((processor->id << 8) | processor->eid,/* APIC ID */
 233                             processor->lapic_flags & ACPI_MADT_ENABLED);
 234
 235         return 0;
 236 }
 237
 238 static int __init
 239 acpi_parse_lapic_addr_ovr(struct acpi_subtable_header * header,
 240                           const unsigned long end)
 241 {
 242         struct acpi_madt_local_apic_override *lapic_addr_ovr = NULL;
 243
 244         lapic_addr_ovr = (struct acpi_madt_local_apic_override *)header;
 245
 246         if (BAD_MADT_ENTRY(lapic_addr_ovr, end))
 247                 return -EINVAL;
 248
 249         acpi_lapic_addr = lapic_addr_ovr->address;
 250
 251         return 0;
 252 }
 253
 254 static int __init
 255 acpi_parse_x2apic_nmi(struct acpi_subtable_header *header,
 256                       const unsigned long end)
 257 {
 258         struct acpi_madt_local_x2apic_nmi *x2apic_nmi = NULL;
 259
 260         x2apic_nmi = (struct acpi_madt_local_x2apic_nmi *)header;
 261
 262         if (BAD_MADT_ENTRY(x2apic_nmi, end))
 263                 return -EINVAL;
 264
 265         acpi_table_print_madt_entry(header);
 266
 267         if (x2apic_nmi->lint != 1)
 268                 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n");
 269
 270         return 0;
 271 }
 272
 273 static int __init
 274 acpi_parse_lapic_nmi(struct acpi_subtable_header * header, const unsigned long end)
 275 {
 276         struct acpi_madt_local_apic_nmi *lapic_nmi = NULL;
 277
 278         lapic_nmi = (struct acpi_madt_local_apic_nmi *)header;
 279
 280         if (BAD_MADT_ENTRY(lapic_nmi, end))
 281                 return -EINVAL;
 282
 283         acpi_table_print_madt_entry(header);
 284
 285         if (lapic_nmi->lint != 1)
 286                 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n");
 287
 288         return 0;
 289 }
 290
 291 #endif                          /*CONFIG_X86_LOCAL_APIC */
 292
 293 #ifdef CONFIG_X86_IO_APIC
 294
 295 static int __init
 296 acpi_parse_ioapic(struct acpi_subtable_header * header, const unsigned long end)
 297 {
 298         struct acpi_madt_io_apic *ioapic = NULL;
 299
 300         ioapic = (struct acpi_madt_io_apic *)header;
 301
 302         if (BAD_MADT_ENTRY(ioapic, end))
 303                 return -EINVAL;
 304
 305         acpi_table_print_madt_entry(header);
 306
 307         mp_register_ioapic(ioapic->id,
 308                            ioapic->address, ioapic->global_irq_base);
 309
 310         return 0;
 311 }
 312
 313 /*
 314  * Parse Interrupt Source Override for the ACPI SCI
 315  */
 316 static void __init acpi_sci_ioapic_setup(u32 gsi, u16 polarity, u16 trigger)
 317 {
 318         if (trigger == 0)       /* compatible SCI trigger is level */
 319                 trigger = 3;
 320
 321         if (polarity == 0)      /* compatible SCI polarity is low */
 322                 polarity = 3;
 323
 324         /* Command-line over-ride via acpi_sci= */
 325         if (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK)
 326                 trigger = (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2;
 327
 328         if (acpi_sci_flags & ACPI_MADT_POLARITY_MASK)
 329                 polarity = acpi_sci_flags & ACPI_MADT_POLARITY_MASK;
 330
 331         /*
 332          * mp_config_acpi_legacy_irqs() already setup IRQs < 16
 333          * If GSI is < 16, this will update its flags,
 334          * else it will create a new mp_irqs[] entry.
 335          */
 336         mp_override_legacy_irq(gsi, polarity, trigger, gsi);
 337
 338         /*
 339          * stash over-ride to indicate we've been here
 340          * and for later update of acpi_gbl_FADT
 341          */
 342         acpi_sci_override_gsi = gsi;
 343         return;
 344 }
 345
 346 static int __init
 347 acpi_parse_int_src_ovr(struct acpi_subtable_header * header,
 348                        const unsigned long end)
 349 {
 350         struct acpi_madt_interrupt_override *intsrc = NULL;
 351
 352         intsrc = (struct acpi_madt_interrupt_override *)header;
 353
 354         if (BAD_MADT_ENTRY(intsrc, end))
 355                 return -EINVAL;
 356
 357         acpi_table_print_madt_entry(header);
 358
 359         if (intsrc->source_irq == acpi_gbl_FADT.sci_interrupt) {
 360                 acpi_sci_ioapic_setup(intsrc->global_irq,
 361                                       intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
 362                                       (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2);
 363                 return 0;
 364         }
 365
 366         if (acpi_skip_timer_override &&
 367             intsrc->source_irq == 0 && intsrc->global_irq == 2) {
 368                 printk(PREFIX "BIOS IRQ0 pin2 override ignored.\n");
 369                 return 0;
 370         }
 371
 372         mp_override_legacy_irq(intsrc->source_irq,
 373                                 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
 374                                 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2,
 375                                 intsrc->global_irq);
 376
 377         return 0;
 378 }
 379
 380 static int __init
 381 acpi_parse_nmi_src(struct acpi_subtable_header * header, const unsigned long end)
 382 {
 383         struct acpi_madt_nmi_source *nmi_src = NULL;
 384
 385         nmi_src = (struct acpi_madt_nmi_source *)header;
 386
 387         if (BAD_MADT_ENTRY(nmi_src, end))
 388                 return -EINVAL;
 389
 390         acpi_table_print_madt_entry(header);
 391
 392         /* TBD: Support nimsrc entries? */
 393
 394         return 0;
 395 }
 396
 397 #endif                          /* CONFIG_X86_IO_APIC */
 398
 399 /*
 400  * acpi_pic_sci_set_trigger()
 401  *
 402  * use ELCR to set PIC-mode trigger type for SCI
 403  *
 404  * If a PIC-mode SCI is not recognized or gives spurious IRQ7's
 405  * it may require Edge Trigger -- use "acpi_sci=edge"
 406  *
 407  * Port 0x4d0-4d1 are ECLR1 and ECLR2, the Edge/Level Control Registers
 408  * for the 8259 PIC.  bit[n] = 1 means irq[n] is Level, otherwise Edge.
 409  * ECLR1 is IRQs 0-7 (IRQ 0, 1, 2 must be 0)
 410  * ECLR2 is IRQs 8-15 (IRQ 8, 13 must be 0)
 411  */
 412
 413 void __init acpi_pic_sci_set_trigger(unsigned int irq, u16 trigger)
 414 {
 415         unsigned int mask = 1 << irq;
 416         unsigned int old, new;
 417
 418         /* Real old ELCR mask */
 419         old = inb(0x4d0) | (inb(0x4d1) << 8);
 420
 421         /*
 422          * If we use ACPI to set PCI IRQs, then we should clear ELCR
 423          * since we will set it correctly as we enable the PCI irq
 424          * routing.
 425          */
 426         new = acpi_noirq ? old : 0;
 427
 428         /*
 429          * Update SCI information in the ELCR, it isn't in the PCI
 430          * routing tables..
 431          */
 432         switch (trigger) {
 433         case 1:         /* Edge - clear */
 434                 new &= ~mask;
 435                 break;
 436         case 3:         /* Level - set */
 437                 new |= mask;
 438                 break;
 439         }
 440
 441         if (old == new)
 442                 return;
 443
 444         printk(PREFIX "setting ELCR to %04x (from %04x)\n", new, old);
 445         outb(new, 0x4d0);
 446         outb(new >> 8, 0x4d1);
 447 }
 448
 449 int acpi_gsi_to_irq(u32 gsi, unsigned int *irq)
 450 {
 451         *irq = gsi;
 452
 453 #ifdef CONFIG_X86_IO_APIC
 454         if (acpi_irq_model == ACPI_IRQ_MODEL_IOAPIC)
 455                 setup_IO_APIC_irq_extra(gsi);
 456 #endif
 457
 458         return 0;
 459 }
 460
 461 /*
 462  * success: return IRQ number (>=0)
 463  * failure: return < 0
 464  */
 465 int acpi_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity)
 466 {
 467         unsigned int irq;
 468         unsigned int plat_gsi = gsi;
 469
 470 #ifdef CONFIG_PCI
 471         /*
 472          * Make sure all (legacy) PCI IRQs are set as level-triggered.
 473          */
 474         if (acpi_irq_model == ACPI_IRQ_MODEL_PIC) {
 475                 if (trigger == ACPI_LEVEL_SENSITIVE)
 476                         eisa_set_level_irq(gsi);
 477         }
 478 #endif
 479
 480 #ifdef CONFIG_X86_IO_APIC
 481         if (acpi_irq_model == ACPI_IRQ_MODEL_IOAPIC) {
 482                 plat_gsi = mp_register_gsi(dev, gsi, trigger, polarity);
 483         }
 484 #endif
 485         irq = plat_gsi;
 486
 487         return irq;
 488 }
 489
 490 /*
 491  *  ACPI based hotplug support for CPU
 492  */
 493 #ifdef CONFIG_ACPI_HOTPLUG_CPU
 494 #include <acpi/processor.h>
 495
 496 static void acpi_map_cpu2node(acpi_handle handle, int cpu, int physid)
 497 {
 498 #ifdef CONFIG_ACPI_NUMA
 499         int nid;
 500
 501         nid = acpi_get_node(handle);
 502         if (nid == -1 || !node_online(nid))
 503                 return;
 504 #ifdef CONFIG_X86_64
 505         apicid_to_node[physid] = nid;
 506         numa_set_node(cpu, nid);
 507 #else /* CONFIG_X86_32 */
 508         apicid_2_node[physid] = nid;
 509         cpu_to_node_map[cpu] = nid;
 510 #endif
 511
 512 #endif
 513 }
 514
 515 static int __cpuinit _acpi_map_lsapic(acpi_handle handle, int *pcpu)
 516 {
 517         struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
 518         union acpi_object *obj;
 519         struct acpi_madt_local_apic *lapic;
 520         cpumask_var_t tmp_map, new_map;
 521         u8 physid;
 522         int cpu;
 523         int retval = -ENOMEM;
 524
 525         if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer)))
 526                 return -EINVAL;
 527
 528         if (!buffer.length || !buffer.pointer)
 529                 return -EINVAL;
 530
 531         obj = buffer.pointer;
 532         if (obj->type != ACPI_TYPE_BUFFER ||
 533             obj->buffer.length < sizeof(*lapic)) {
 534                 kfree(buffer.pointer);
 535                 return -EINVAL;
 536         }
 537
 538         lapic = (struct acpi_madt_local_apic *)obj->buffer.pointer;
 539
 540         if (lapic->header.type != ACPI_MADT_TYPE_LOCAL_APIC ||
 541             !(lapic->lapic_flags & ACPI_MADT_ENABLED)) {
 542                 kfree(buffer.pointer);
 543                 return -EINVAL;
 544         }
 545
 546         physid = lapic->id;
 547
 548         kfree(buffer.pointer);
 549         buffer.length = ACPI_ALLOCATE_BUFFER;
 550         buffer.pointer = NULL;
 551
 552         if (!alloc_cpumask_var(&tmp_map, GFP_KERNEL))
 553                 goto out;
 554
 555         if (!alloc_cpumask_var(&new_map, GFP_KERNEL))
 556                 goto free_tmp_map;
 557
 558         cpumask_copy(tmp_map, cpu_present_mask);
 559         acpi_register_lapic(physid, lapic->lapic_flags & ACPI_MADT_ENABLED);
 560
 561         /*
 562          * If mp_register_lapic successfully generates a new logical cpu
 563          * number, then the following will get us exactly what was mapped
 564          */
 565         cpumask_andnot(new_map, cpu_present_mask, tmp_map);
 566         if (cpumask_empty(new_map)) {
 567                 printk ("Unable to map lapic to logical cpu number\n");
 568                 retval = -EINVAL;
 569                 goto free_new_map;
 570         }
 571
 572         acpi_processor_set_pdc(handle);
 573
 574         cpu = cpumask_first(new_map);
 575         acpi_map_cpu2node(handle, cpu, physid);
 576
 577         *pcpu = cpu;
 578         retval = 0;
 579
 580 free_new_map:
 581         free_cpumask_var(new_map);
 582 free_tmp_map:
 583         free_cpumask_var(tmp_map);
 584 out:
 585         return retval;
 586 }
 587
 588 /* wrapper to silence section mismatch warning */
 589 int __ref acpi_map_lsapic(acpi_handle handle, int *pcpu)
 590 {
 591         return _acpi_map_lsapic(handle, pcpu);
 592 }
 593 EXPORT_SYMBOL(acpi_map_lsapic);
 594
 595 int acpi_unmap_lsapic(int cpu)
 596 {
 597         per_cpu(x86_cpu_to_apicid, cpu) = -1;
 598         set_cpu_present(cpu, false);
 599         num_processors--;
 600
 601         return (0);
 602 }
 603
 604 EXPORT_SYMBOL(acpi_unmap_lsapic);
 605 #endif                          /* CONFIG_ACPI_HOTPLUG_CPU */
 606
 607 int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base)
 608 {
 609         /* TBD */
 610         return -EINVAL;
 611 }
 612
 613 EXPORT_SYMBOL(acpi_register_ioapic);
 614
 615 int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base)
 616 {
 617         /* TBD */
 618         return -EINVAL;
 619 }
 620
 621 EXPORT_SYMBOL(acpi_unregister_ioapic);
 622
 623 static int __init acpi_parse_sbf(struct acpi_table_header *table)
 624 {
 625         struct acpi_table_boot *sb;
 626
 627         sb = (struct acpi_table_boot *)table;
 628         if (!sb) {
 629                 printk(KERN_WARNING PREFIX "Unable to map SBF\n");
 630                 return -ENODEV;
 631         }
 632
 633         sbf_port = sb->cmos_index;      /* Save CMOS port */
 634
 635         return 0;
 636 }
 637
 638 #ifdef CONFIG_HPET_TIMER
 639 #include <asm/hpet.h>
 640
 641 static struct __initdata resource *hpet_res;
 642
 643 static int __init acpi_parse_hpet(struct acpi_table_header *table)
 644 {
 645         struct acpi_table_hpet *hpet_tbl;
 646
 647         hpet_tbl = (struct acpi_table_hpet *)table;
 648         if (!hpet_tbl) {
 649                 printk(KERN_WARNING PREFIX "Unable to map HPET\n");
 650                 return -ENODEV;
 651         }
 652
 653         if (hpet_tbl->address.space_id != ACPI_SPACE_MEM) {
 654                 printk(KERN_WARNING PREFIX "HPET timers must be located in "
 655                        "memory.\n");
 656                 return -1;
 657         }
 658
 659         hpet_address = hpet_tbl->address.address;
 660         hpet_blockid = hpet_tbl->sequence;
 661
 662         /*
 663          * Some broken BIOSes advertise HPET at 0x0. We really do not
 664          * want to allocate a resource there.
 665          */
 666         if (!hpet_address) {
 667                 printk(KERN_WARNING PREFIX
 668                        "HPET id: %#x base: %#lx is invalid\n",
 669                        hpet_tbl->id, hpet_address);
 670                 return 0;
 671         }
 672 #ifdef CONFIG_X86_64
 673         /*
 674          * Some even more broken BIOSes advertise HPET at
 675          * 0xfed0000000000000 instead of 0xfed00000. Fix it up and add
 676          * some noise:
 677          */
 678         if (hpet_address == 0xfed0000000000000UL) {
 679                 if (!hpet_force_user) {
 680                         printk(KERN_WARNING PREFIX "HPET id: %#x "
 681                                "base: 0xfed0000000000000 is bogus\n "
 682                                "try hpet=force on the kernel command line to "
 683                                "fix it up to 0xfed00000.\n", hpet_tbl->id);
 684                         hpet_address = 0;
 685                         return 0;
 686                 }
 687                 printk(KERN_WARNING PREFIX
 688                        "HPET id: %#x base: 0xfed0000000000000 fixed up "
 689                        "to 0xfed00000.\n", hpet_tbl->id);
 690                 hpet_address >>= 32;
 691         }
 692 #endif
 693         printk(KERN_INFO PREFIX "HPET id: %#x base: %#lx\n",
 694                hpet_tbl->id, hpet_address);
 695
 696         /*
 697          * Allocate and initialize the HPET firmware resource for adding into
 698          * the resource tree during the lateinit timeframe.
 699          */
 700 #define HPET_RESOURCE_NAME_SIZE 9
 701         hpet_res = alloc_bootmem(sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE);
 702
 703         hpet_res->name = (void *)&hpet_res[1];
 704         hpet_res->flags = IORESOURCE_MEM;
 705         snprintf((char *)hpet_res->name, HPET_RESOURCE_NAME_SIZE, "HPET %u",
 706                  hpet_tbl->sequence);
 707
 708         hpet_res->start = hpet_address;
 709         hpet_res->end = hpet_address + (1 * 1024) - 1;
 710
 711         return 0;
 712 }
 713
 714 /*
 715  * hpet_insert_resource inserts the HPET resources used into the resource
 716  * tree.
 717  */
 718 static __init int hpet_insert_resource(void)
 719 {
 720         if (!hpet_res)
 721                 return 1;
 722
 723         return insert_resource(&iomem_resource, hpet_res);
 724 }
 725
 726 late_initcall(hpet_insert_resource);
 727
 728 #else
 729 #define acpi_parse_hpet NULL
 730 #endif
 731
 732 static int __init acpi_parse_fadt(struct acpi_table_header *table)
 733 {
 734
 735 #ifdef CONFIG_X86_PM_TIMER
 736         /* detect the location of the ACPI PM Timer */
 737         if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID) {
 738                 /* FADT rev. 2 */
 739                 if (acpi_gbl_FADT.xpm_timer_block.space_id !=
 740                     ACPI_ADR_SPACE_SYSTEM_IO)
 741                         return 0;
 742
 743                 pmtmr_ioport = acpi_gbl_FADT.xpm_timer_block.address;
 744                 /*
 745                  * "X" fields are optional extensions to the original V1.0
 746                  * fields, so we must selectively expand V1.0 fields if the
 747                  * corresponding X field is zero.
 748                  */
 749                 if (!pmtmr_ioport)
 750                         pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
 751         } else {
 752                 /* FADT rev. 1 */
 753                 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
 754         }
 755         if (pmtmr_ioport)
 756                 printk(KERN_INFO PREFIX "PM-Timer IO Port: %#x\n",
 757                        pmtmr_ioport);
 758 #endif
 759         return 0;
 760 }
 761
 762 #ifdef  CONFIG_X86_LOCAL_APIC
 763 /*
 764  * Parse LAPIC entries in MADT
 765  * returns 0 on success, < 0 on error
 766  */
 767
 768 static void __init acpi_register_lapic_address(unsigned long address)
 769 {
 770         mp_lapic_addr = address;
 771
 772         set_fixmap_nocache(FIX_APIC_BASE, address);
 773         if (boot_cpu_physical_apicid == -1U) {
 774                 boot_cpu_physical_apicid  = read_apic_id();
 775                 apic_version[boot_cpu_physical_apicid] =
 776                          GET_APIC_VERSION(apic_read(APIC_LVR));
 777         }
 778 }
 779
 780 static int __init early_acpi_parse_madt_lapic_addr_ovr(void)
 781 {
 782         int count;
 783
 784         if (!cpu_has_apic)
 785                 return -ENODEV;
 786
 787         /*
 788          * Note that the LAPIC address is obtained from the MADT (32-bit value)
 789          * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value).
 790          */
 791
 792         count =
 793             acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
 794                                   acpi_parse_lapic_addr_ovr, 0);
 795         if (count < 0) {
 796                 printk(KERN_ERR PREFIX
 797                        "Error parsing LAPIC address override entry\n");
 798                 return count;
 799         }
 800
 801         acpi_register_lapic_address(acpi_lapic_addr);
 802
 803         return count;
 804 }
 805
 806 static int __init acpi_parse_madt_lapic_entries(void)
 807 {
 808         int count;
 809         int x2count = 0;
 810
 811         if (!cpu_has_apic)
 812                 return -ENODEV;
 813
 814         /*
 815          * Note that the LAPIC address is obtained from the MADT (32-bit value)
 816          * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value).
 817          */
 818
 819         count =
 820             acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
 821                                   acpi_parse_lapic_addr_ovr, 0);
 822         if (count < 0) {
 823                 printk(KERN_ERR PREFIX
 824                        "Error parsing LAPIC address override entry\n");
 825                 return count;
 826         }
 827
 828         acpi_register_lapic_address(acpi_lapic_addr);
 829
 830         count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC,
 831                                       acpi_parse_sapic, MAX_APICS);
 832
 833         if (!count) {
 834                 x2count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC,
 835                                                 acpi_parse_x2apic, MAX_APICS);
 836                 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC,
 837                                               acpi_parse_lapic, MAX_APICS);
 838         }
 839         if (!count && !x2count) {
 840                 printk(KERN_ERR PREFIX "No LAPIC entries present\n");
 841                 /* TBD: Cleanup to allow fallback to MPS */
 842                 return -ENODEV;
 843         } else if (count < 0 || x2count < 0) {
 844                 printk(KERN_ERR PREFIX "Error parsing LAPIC entry\n");
 845                 /* TBD: Cleanup to allow fallback to MPS */
 846                 return count;
 847         }
 848
 849         x2count =
 850             acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC_NMI,
 851                                   acpi_parse_x2apic_nmi, 0);
 852         count =
 853             acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI, acpi_parse_lapic_nmi, 0);
 854         if (count < 0 || x2count < 0) {
 855                 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n");
 856                 /* TBD: Cleanup to allow fallback to MPS */
 857                 return count;
 858         }
 859         return 0;
 860 }
 861 #endif                          /* CONFIG_X86_LOCAL_APIC */
 862
 863 #ifdef  CONFIG_X86_IO_APIC
 864 #define MP_ISA_BUS              0
 865
 866 #ifdef CONFIG_X86_ES7000
 867 extern int es7000_plat;
 868 #endif
 869
 870 int __init acpi_probe_gsi(void)
 871 {
 872         int idx;
 873         int gsi;
 874         int max_gsi = 0;
 875
 876         if (acpi_disabled)
 877                 return 0;
 878
 879         if (!acpi_ioapic)
 880                 return 0;
 881
 882         max_gsi = 0;
 883         for (idx = 0; idx < nr_ioapics; idx++) {
 884                 gsi = mp_gsi_routing[idx].gsi_end;
 885
 886                 if (gsi > max_gsi)
 887                         max_gsi = gsi;
 888         }
 889
 890         return max_gsi + 1;
 891 }
 892
 893 static void assign_to_mp_irq(struct mpc_intsrc *m,
 894                                     struct mpc_intsrc *mp_irq)
 895 {
 896         memcpy(mp_irq, m, sizeof(struct mpc_intsrc));
 897 }
 898
 899 static int mp_irq_cmp(struct mpc_intsrc *mp_irq,
 900                                 struct mpc_intsrc *m)
 901 {
 902         return memcmp(mp_irq, m, sizeof(struct mpc_intsrc));
 903 }
 904
 905 static void save_mp_irq(struct mpc_intsrc *m)
 906 {
 907         int i;
 908
 909         for (i = 0; i < mp_irq_entries; i++) {
 910                 if (!mp_irq_cmp(&mp_irqs[i], m))
 911                         return;
 912         }
 913
 914         assign_to_mp_irq(m, &mp_irqs[mp_irq_entries]);
 915         if (++mp_irq_entries == MAX_IRQ_SOURCES)
 916                 panic("Max # of irq sources exceeded!!\n");
 917 }
 918
 919 void __init mp_override_legacy_irq(u8 bus_irq, u8 polarity, u8 trigger, u32 gsi)
 920 {
 921         int ioapic;
 922         int pin;
 923         struct mpc_intsrc mp_irq;
 924
 925         /*
 926          * Convert 'gsi' to 'ioapic.pin'.
 927          */
 928         ioapic = mp_find_ioapic(gsi);
 929         if (ioapic < 0)
 930                 return;
 931         pin = mp_find_ioapic_pin(ioapic, gsi);
 932
 933         /*
 934          * TBD: This check is for faulty timer entries, where the override
 935          *      erroneously sets the trigger to level, resulting in a HUGE
 936          *      increase of timer interrupts!
 937          */
 938         if ((bus_irq == 0) && (trigger == 3))
 939                 trigger = 1;
 940
 941         mp_irq.type = MP_INTSRC;
 942         mp_irq.irqtype = mp_INT;
 943         mp_irq.irqflag = (trigger << 2) | polarity;
 944         mp_irq.srcbus = MP_ISA_BUS;
 945         mp_irq.srcbusirq = bus_irq;     /* IRQ */
 946         mp_irq.dstapic = mp_ioapics[ioapic].apicid; /* APIC ID */
 947         mp_irq.dstirq = pin;    /* INTIN# */
 948
 949         save_mp_irq(&mp_irq);
 950 }
 951
 952 void __init mp_config_acpi_legacy_irqs(void)
 953 {
 954         int i;
 955         int ioapic;
 956         unsigned int dstapic;
 957         struct mpc_intsrc mp_irq;
 958
 959 #if defined (CONFIG_MCA) || defined (CONFIG_EISA)
 960         /*
 961          * Fabricate the legacy ISA bus (bus #31).
 962          */
 963         mp_bus_id_to_type[MP_ISA_BUS] = MP_BUS_ISA;
 964 #endif
 965         set_bit(MP_ISA_BUS, mp_bus_not_pci);
 966         pr_debug("Bus #%d is ISA\n", MP_ISA_BUS);
 967
 968 #ifdef CONFIG_X86_ES7000
 969         /*
 970          * Older generations of ES7000 have no legacy identity mappings
 971          */
 972         if (es7000_plat == 1)
 973                 return;
 974 #endif
 975
 976         /*
 977          * Locate the IOAPIC that manages the ISA IRQs (0-15).
 978          */
 979         ioapic = mp_find_ioapic(0);
 980         if (ioapic < 0)
 981                 return;
 982         dstapic = mp_ioapics[ioapic].apicid;
 983
 984         /*
 985          * Use the default configuration for the IRQs 0-15.  Unless
 986          * overridden by (MADT) interrupt source override entries.
 987          */
 988         for (i = 0; i < 16; i++) {
 989                 int idx;
 990
 991                 for (idx = 0; idx < mp_irq_entries; idx++) {
 992                         struct mpc_intsrc *irq = mp_irqs + idx;
 993
 994                         /* Do we already have a mapping for this ISA IRQ? */
 995                         if (irq->srcbus == MP_ISA_BUS && irq->srcbusirq == i)
 996                                 break;
 997
 998                         /* Do we already have a mapping for this IOAPIC pin */
 999                         if (irq->dstapic == dstapic && irq->dstirq == i)
1000                                 break;
1001                 }
1002
1003                 if (idx != mp_irq_entries) {
1004                         printk(KERN_DEBUG "ACPI: IRQ%d used by override.\n", i);
1005                         continue;       /* IRQ already used */
1006                 }
1007
1008                 mp_irq.type = MP_INTSRC;
1009                 mp_irq.irqflag = 0;     /* Conforming */
1010                 mp_irq.srcbus = MP_ISA_BUS;
1011                 mp_irq.dstapic = dstapic;
1012                 mp_irq.irqtype = mp_INT;
1013                 mp_irq.srcbusirq = i; /* Identity mapped */
1014                 mp_irq.dstirq = i;
1015
1016                 save_mp_irq(&mp_irq);
1017         }
1018 }
1019
1020 static int mp_config_acpi_gsi(struct device *dev, u32 gsi, int trigger,
1021                         int polarity)
1022 {
1023 #ifdef CONFIG_X86_MPPARSE
1024         struct mpc_intsrc mp_irq;
1025         struct pci_dev *pdev;
1026         unsigned char number;
1027         unsigned int devfn;
1028         int ioapic;
1029         u8 pin;
1030
1031         if (!acpi_ioapic)
1032                 return 0;
1033         if (!dev)
1034                 return 0;
1035         if (dev->bus != &pci_bus_type)
1036                 return 0;
1037
1038         pdev = to_pci_dev(dev);
1039         number = pdev->bus->number;
1040         devfn = pdev->devfn;
1041         pin = pdev->pin;
1042         /* print the entry should happen on mptable identically */
1043         mp_irq.type = MP_INTSRC;
1044         mp_irq.irqtype = mp_INT;
1045         mp_irq.irqflag = (trigger == ACPI_EDGE_SENSITIVE ? 4 : 0x0c) |
1046                                 (polarity == ACPI_ACTIVE_HIGH ? 1 : 3);
1047         mp_irq.srcbus = number;
1048         mp_irq.srcbusirq = (((devfn >> 3) & 0x1f) << 2) | ((pin - 1) & 3);
1049         ioapic = mp_find_ioapic(gsi);
1050         mp_irq.dstapic = mp_ioapics[ioapic].apicid;
1051         mp_irq.dstirq = mp_find_ioapic_pin(ioapic, gsi);
1052
1053         save_mp_irq(&mp_irq);
1054 #endif
1055         return 0;
1056 }
1057
1058 int mp_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity)
1059 {
1060         int ioapic;
1061         int ioapic_pin;
1062         struct io_apic_irq_attr irq_attr;
1063
1064         if (acpi_irq_model != ACPI_IRQ_MODEL_IOAPIC)
1065                 return gsi;
1066
1067         /* Don't set up the ACPI SCI because it's already set up */
1068         if (acpi_gbl_FADT.sci_interrupt == gsi)
1069                 return gsi;
1070
1071         ioapic = mp_find_ioapic(gsi);
1072         if (ioapic < 0) {
1073                 printk(KERN_WARNING "No IOAPIC for GSI %u\n", gsi);
1074                 return gsi;
1075         }
1076
1077         ioapic_pin = mp_find_ioapic_pin(ioapic, gsi);
1078
1079 #ifdef CONFIG_X86_32
1080         if (ioapic_renumber_irq)
1081                 gsi = ioapic_renumber_irq(ioapic, gsi);
1082 #endif
1083
1084         if (ioapic_pin > MP_MAX_IOAPIC_PIN) {
1085                 printk(KERN_ERR "Invalid reference to IOAPIC pin "
1086                        "%d-%d\n", mp_ioapics[ioapic].apicid,
1087                        ioapic_pin);
1088                 return gsi;
1089         }
1090
1091         if (enable_update_mptable)
1092                 mp_config_acpi_gsi(dev, gsi, trigger, polarity);
1093
1094         set_io_apic_irq_attr(&irq_attr, ioapic, ioapic_pin,
1095                              trigger == ACPI_EDGE_SENSITIVE ? 0 : 1,
1096                              polarity == ACPI_ACTIVE_HIGH ? 0 : 1);
1097         io_apic_set_pci_routing(dev, gsi, &irq_attr);
1098
1099         return gsi;
1100 }
1101
1102 /*
1103  * Parse IOAPIC related entries in MADT
1104  * returns 0 on success, < 0 on error
1105  */
1106 static int __init acpi_parse_madt_ioapic_entries(void)
1107 {
1108         int count;
1109
1110         /*
1111          * ACPI interpreter is required to complete interrupt setup,
1112          * so if it is off, don't enumerate the io-apics with ACPI.
1113          * If MPS is present, it will handle them,
1114          * otherwise the system will stay in PIC mode
1115          */
1116         if (acpi_disabled || acpi_noirq)
1117                 return -ENODEV;
1118
1119         if (!cpu_has_apic)
1120                 return -ENODEV;
1121
1122         /*
1123          * if "noapic" boot option, don't look for IO-APICs
1124          */
1125         if (skip_ioapic_setup) {
1126                 printk(KERN_INFO PREFIX "Skipping IOAPIC probe "
1127                        "due to 'noapic' option.\n");
1128                 return -ENODEV;
1129         }
1130
1131         count =
1132             acpi_table_parse_madt(ACPI_MADT_TYPE_IO_APIC, acpi_parse_ioapic,
1133                                   MAX_IO_APICS);
1134         if (!count) {
1135                 printk(KERN_ERR PREFIX "No IOAPIC entries present\n");
1136                 return -ENODEV;
1137         } else if (count < 0) {
1138                 printk(KERN_ERR PREFIX "Error parsing IOAPIC entry\n");
1139                 return count;
1140         }
1141
1142         count =
1143             acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE, acpi_parse_int_src_ovr,
1144                                   nr_irqs);
1145         if (count < 0) {
1146                 printk(KERN_ERR PREFIX
1147                        "Error parsing interrupt source overrides entry\n");
1148                 /* TBD: Cleanup to allow fallback to MPS */
1149                 return count;
1150         }
1151
1152         /*
1153          * If BIOS did not supply an INT_SRC_OVR for the SCI
1154          * pretend we got one so we can set the SCI flags.
1155          */
1156         if (!acpi_sci_override_gsi)
1157                 acpi_sci_ioapic_setup(acpi_gbl_FADT.sci_interrupt, 0, 0);
1158
1159         /* Fill in identity legacy mappings where no override */
1160         mp_config_acpi_legacy_irqs();
1161
1162         count =
1163             acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE, acpi_parse_nmi_src,
1164                                   nr_irqs);
1165         if (count < 0) {
1166                 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n");
1167                 /* TBD: Cleanup to allow fallback to MPS */
1168                 return count;
1169         }
1170
1171         return 0;
1172 }
1173 #else
1174 static inline int acpi_parse_madt_ioapic_entries(void)
1175 {
1176         return -1;
1177 }
1178 #endif  /* !CONFIG_X86_IO_APIC */
1179
1180 static void __init early_acpi_process_madt(void)
1181 {
1182 #ifdef CONFIG_X86_LOCAL_APIC
1183         int error;
1184
1185         if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1186
1187                 /*
1188                  * Parse MADT LAPIC entries
1189                  */
1190                 error = early_acpi_parse_madt_lapic_addr_ovr();
1191                 if (!error) {
1192                         acpi_lapic = 1;
1193                         smp_found_config = 1;
1194                 }
1195                 if (error == -EINVAL) {
1196                         /*
1197                          * Dell Precision Workstation 410, 610 come here.
1198                          */
1199                         printk(KERN_ERR PREFIX
1200                                "Invalid BIOS MADT, disabling ACPI\n");
1201                         disable_acpi();
1202                 }
1203         }
1204 #endif
1205 }
1206
1207 static void __init acpi_process_madt(void)
1208 {
1209 #ifdef CONFIG_X86_LOCAL_APIC
1210         int error;
1211
1212         if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1213
1214                 /*
1215                  * Parse MADT LAPIC entries
1216                  */
1217                 error = acpi_parse_madt_lapic_entries();
1218                 if (!error) {
1219                         acpi_lapic = 1;
1220
1221                         /*
1222                          * Parse MADT IO-APIC entries
1223                          */
1224                         error = acpi_parse_madt_ioapic_entries();
1225                         if (!error) {
1226                                 acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC;
1227                                 acpi_ioapic = 1;
1228
1229                                 smp_found_config = 1;
1230                         }
1231                 }
1232                 if (error == -EINVAL) {
1233                         /*
1234                          * Dell Precision Workstation 410, 610 come here.
1235                          */
1236                         printk(KERN_ERR PREFIX
1237                                "Invalid BIOS MADT, disabling ACPI\n");
1238                         disable_acpi();
1239                 }
1240         } else {
1241                 /*
1242                  * ACPI found no MADT, and so ACPI wants UP PIC mode.
1243                  * In the event an MPS table was found, forget it.
1244                  * Boot with "acpi=off" to use MPS on such a system.
1245                  */
1246                 if (smp_found_config) {
1247                         printk(KERN_WARNING PREFIX
1248                                 "No APIC-table, disabling MPS\n");
1249                         smp_found_config = 0;
1250                 }
1251         }
1252
1253         /*
1254          * ACPI supports both logical (e.g. Hyper-Threading) and physical
1255          * processors, where MPS only supports physical.
1256          */
1257         if (acpi_lapic && acpi_ioapic)
1258                 printk(KERN_INFO "Using ACPI (MADT) for SMP configuration "
1259                        "information\n");
1260         else if (acpi_lapic)
1261                 printk(KERN_INFO "Using ACPI for processor (LAPIC) "
1262                        "configuration information\n");
1263 #endif
1264         return;
1265 }
1266
1267 static int __init disable_acpi_irq(const struct dmi_system_id *d)
1268 {
1269         if (!acpi_force) {
1270                 printk(KERN_NOTICE "%s detected: force use of acpi=noirq\n",
1271                        d->ident);
1272                 acpi_noirq_set();
1273         }
1274         return 0;
1275 }
1276
1277 static int __init disable_acpi_pci(const struct dmi_system_id *d)
1278 {
1279         if (!acpi_force) {
1280                 printk(KERN_NOTICE "%s detected: force use of pci=noacpi\n",
1281                        d->ident);
1282                 acpi_disable_pci();
1283         }
1284         return 0;
1285 }
1286
1287 static int __init dmi_disable_acpi(const struct dmi_system_id *d)
1288 {
1289         if (!acpi_force) {
1290                 printk(KERN_NOTICE "%s detected: acpi off\n", d->ident);
1291                 disable_acpi();
1292         } else {
1293                 printk(KERN_NOTICE
1294                        "Warning: DMI blacklist says broken, but acpi forced\n");
1295         }
1296         return 0;
1297 }
1298
1299 /*
1300  * Force ignoring BIOS IRQ0 pin2 override
1301  */
1302 static int __init dmi_ignore_irq0_timer_override(const struct dmi_system_id *d)
1303 {
1304         /*
1305          * The ati_ixp4x0_rev() early PCI quirk should have set
1306          * the acpi_skip_timer_override flag already:
1307          */
1308         if (!acpi_skip_timer_override) {
1309                 WARN(1, KERN_ERR "ati_ixp4x0 quirk not complete.\n");
1310                 pr_notice("%s detected: Ignoring BIOS IRQ0 pin2 override\n",
1311                         d->ident);
1312                 acpi_skip_timer_override = 1;
1313         }
1314         return 0;
1315 }
1316
1317 /*
1318  * If your system is blacklisted here, but you find that acpi=force
1319  * works for you, please contact linux-acpi@vger.kernel.org
1320  */
1321 static struct dmi_system_id __initdata acpi_dmi_table[] = {
1322         /*
1323          * Boxes that need ACPI disabled
1324          */
1325         {
1326          .callback = dmi_disable_acpi,
1327          .ident = "IBM Thinkpad",
1328          .matches = {
1329                      DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1330                      DMI_MATCH(DMI_BOARD_NAME, "2629H1G"),
1331                      },
1332          },
1333
1334         /*
1335          * Boxes that need ACPI PCI IRQ routing disabled
1336          */
1337         {
1338          .callback = disable_acpi_irq,
1339          .ident = "ASUS A7V",
1340          .matches = {
1341                      DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC"),
1342                      DMI_MATCH(DMI_BOARD_NAME, "<A7V>"),
1343                      /* newer BIOS, Revision 1011, does work */
1344                      DMI_MATCH(DMI_BIOS_VERSION,
1345                                "ASUS A7V ACPI BIOS Revision 1007"),
1346                      },
1347          },
1348         {
1349                 /*
1350                  * Latest BIOS for IBM 600E (1.16) has bad pcinum
1351                  * for LPC bridge, which is needed for the PCI
1352                  * interrupt links to work. DSDT fix is in bug 5966.
1353                  * 2645, 2646 model numbers are shared with 600/600E/600X
1354                  */
1355          .callback = disable_acpi_irq,
1356          .ident = "IBM Thinkpad 600 Series 2645",
1357          .matches = {
1358                      DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1359                      DMI_MATCH(DMI_BOARD_NAME, "2645"),
1360                      },
1361          },
1362         {
1363          .callback = disable_acpi_irq,
1364          .ident = "IBM Thinkpad 600 Series 2646",
1365          .matches = {
1366                      DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1367                      DMI_MATCH(DMI_BOARD_NAME, "2646"),
1368                      },
1369          },
1370         /*
1371          * Boxes that need ACPI PCI IRQ routing and PCI scan disabled
1372          */
1373         {                       /* _BBN 0 bug */
1374          .callback = disable_acpi_pci,
1375          .ident = "ASUS PR-DLS",
1376          .matches = {
1377                      DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1378                      DMI_MATCH(DMI_BOARD_NAME, "PR-DLS"),
1379                      DMI_MATCH(DMI_BIOS_VERSION,
1380                                "ASUS PR-DLS ACPI BIOS Revision 1010"),
1381                      DMI_MATCH(DMI_BIOS_DATE, "03/21/2003")
1382                      },
1383          },
1384         {
1385          .callback = disable_acpi_pci,
1386          .ident = "Acer TravelMate 36x Laptop",
1387          .matches = {
1388                      DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
1389                      DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"),
1390                      },
1391          },
1392         {}
1393 };
1394
1395 /* second table for DMI checks that should run after early-quirks */
1396 static struct dmi_system_id __initdata acpi_dmi_table_late[] = {
1397         /*
1398          * HP laptops which use a DSDT reporting as HP/SB400/10000,
1399          * which includes some code which overrides all temperature
1400          * trip points to 16C if the INTIN2 input of the I/O APIC
1401          * is enabled.  This input is incorrectly designated the
1402          * ISA IRQ 0 via an interrupt source override even though
1403          * it is wired to the output of the master 8259A and INTIN0
1404          * is not connected at all.  Force ignoring BIOS IRQ0 pin2
1405          * override in that cases.
1406          */
1407         {
1408          .callback = dmi_ignore_irq0_timer_override,
1409          .ident = "HP nx6115 laptop",
1410          .matches = {
1411                      DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1412                      DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6115"),
1413                      },
1414          },
1415         {
1416          .callback = dmi_ignore_irq0_timer_override,
1417          .ident = "HP NX6125 laptop",
1418          .matches = {
1419                      DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1420                      DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6125"),
1421                      },
1422          },
1423         {
1424          .callback = dmi_ignore_irq0_timer_override,
1425          .ident = "HP NX6325 laptop",
1426          .matches = {
1427                      DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1428                      DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6325"),
1429                      },
1430          },
1431         {
1432          .callback = dmi_ignore_irq0_timer_override,
1433          .ident = "HP 6715b laptop",
1434          .matches = {
1435                      DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1436                      DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq 6715b"),
1437                      },
1438          },
1439         {}
1440 };
1441
1442 /*
1443  * acpi_boot_table_init() and acpi_boot_init()
1444  *  called from setup_arch(), always.
1445  *      1. checksums all tables
1446  *      2. enumerates lapics
1447  *      3. enumerates io-apics
1448  *
1449  * acpi_table_init() is separate to allow reading SRAT without
1450  * other side effects.
1451  *
1452  * side effects of acpi_boot_init:
1453  *      acpi_lapic = 1 if LAPIC found
1454  *      acpi_ioapic = 1 if IOAPIC found
1455  *      if (acpi_lapic && acpi_ioapic) smp_found_config = 1;
1456  *      if acpi_blacklisted() acpi_disabled = 1;
1457  *      acpi_irq_model=...
1458  *      ...
1459  */
1460
1461 void __init acpi_boot_table_init(void)
1462 {
1463         dmi_check_system(acpi_dmi_table);
1464
1465         /*
1466          * If acpi_disabled, bail out
1467          * One exception: acpi=ht continues far enough to enumerate LAPICs
1468          */
1469         if (acpi_disabled && !acpi_ht)
1470                 return;
1471
1472         /*
1473          * Initialize the ACPI boot-time table parser.
1474          */
1475         if (acpi_table_init()) {
1476                 disable_acpi();
1477                 return;
1478         }
1479
1480         acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1481
1482         /*
1483          * blacklist may disable ACPI entirely
1484          */
1485         if (acpi_blacklisted()) {
1486                 if (acpi_force) {
1487                         printk(KERN_WARNING PREFIX "acpi=force override\n");
1488                 } else {
1489                         printk(KERN_WARNING PREFIX "Disabling ACPI support\n");
1490                         disable_acpi();
1491                         return;
1492                 }
1493         }
1494 }
1495
1496 int __init early_acpi_boot_init(void)
1497 {
1498         /*
1499          * If acpi_disabled, bail out
1500          * One exception: acpi=ht continues far enough to enumerate LAPICs
1501          */
1502         if (acpi_disabled && !acpi_ht)
1503                 return 1;
1504
1505         /*
1506          * Process the Multiple APIC Description Table (MADT), if present
1507          */
1508         early_acpi_process_madt();
1509
1510         return 0;
1511 }
1512
1513 int __init acpi_boot_init(void)
1514 {
1515         /* those are executed after early-quirks are executed */
1516         dmi_check_system(acpi_dmi_table_late);
1517
1518         /*
1519          * If acpi_disabled, bail out
1520          * One exception: acpi=ht continues far enough to enumerate LAPICs
1521          */
1522         if (acpi_disabled && !acpi_ht)
1523                 return 1;
1524
1525         acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1526
1527         /*
1528          * set sci_int and PM timer address
1529          */
1530         acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt);
1531
1532         /*
1533          * Process the Multiple APIC Description Table (MADT), if present
1534          */
1535         acpi_process_madt();
1536
1537         acpi_table_parse(ACPI_SIG_HPET, acpi_parse_hpet);
1538
1539         if (!acpi_noirq)
1540                 x86_init.pci.init = pci_acpi_init;
1541
1542         return 0;
1543 }
1544
1545 static int __init parse_acpi(char *arg)
1546 {
1547         if (!arg)
1548                 return -EINVAL;
1549
1550         /* "acpi=off" disables both ACPI table parsing and interpreter */
1551         if (strcmp(arg, "off") == 0) {
1552                 disable_acpi();
1553         }
1554         /* acpi=force to over-ride black-list */
1555         else if (strcmp(arg, "force") == 0) {
1556                 acpi_force = 1;
1557                 acpi_ht = 1;
1558                 acpi_disabled = 0;
1559         }
1560         /* acpi=strict disables out-of-spec workarounds */
1561         else if (strcmp(arg, "strict") == 0) {
1562                 acpi_strict = 1;
1563         }
1564         /* Limit ACPI just to boot-time to enable HT */
1565         else if (strcmp(arg, "ht") == 0) {
1566                 if (!acpi_force) {
1567                         printk(KERN_WARNING "acpi=ht will be removed in Linux-2.6.35\n");
1568                         disable_acpi();
1569                 }
1570                 acpi_ht = 1;
1571         }
1572         /* acpi=rsdt use RSDT instead of XSDT */
1573         else if (strcmp(arg, "rsdt") == 0) {
1574                 acpi_rsdt_forced = 1;
1575         }
1576         /* "acpi=noirq" disables ACPI interrupt routing */
1577         else if (strcmp(arg, "noirq") == 0) {
1578                 acpi_noirq_set();
1579         } else {
1580                 /* Core will printk when we return error. */
1581                 return -EINVAL;
1582         }
1583         return 0;
1584 }
1585 early_param("acpi", parse_acpi);
1586
1587 /* FIXME: Using pci= for an ACPI parameter is a travesty. */
1588 static int __init parse_pci(char *arg)
1589 {
1590         if (arg && strcmp(arg, "noacpi") == 0)
1591                 acpi_disable_pci();
1592         return 0;
1593 }
1594 early_param("pci", parse_pci);
1595
1596 int __init acpi_mps_check(void)
1597 {
1598 #if defined(CONFIG_X86_LOCAL_APIC) && !defined(CONFIG_X86_MPPARSE)
1599 /* mptable code is not built-in*/
1600         if (acpi_disabled || acpi_noirq) {
1601                 printk(KERN_WARNING "MPS support code is not built-in.\n"
1602                        "Using acpi=off or acpi=noirq or pci=noacpi "
1603                        "may have problem\n");
1604                 return 1;
1605         }
1606 #endif
1607         return 0;
1608 }
1609
1610 #ifdef CONFIG_X86_IO_APIC
1611 static int __init parse_acpi_skip_timer_override(char *arg)
1612 {
1613         acpi_skip_timer_override = 1;
1614         return 0;
1615 }
1616 early_param("acpi_skip_timer_override", parse_acpi_skip_timer_override);
1617
1618 static int __init parse_acpi_use_timer_override(char *arg)
1619 {
1620         acpi_use_timer_override = 1;
1621         return 0;
1622 }
1623 early_param("acpi_use_timer_override", parse_acpi_use_timer_override);
1624 #endif /* CONFIG_X86_IO_APIC */
1625
1626 static int __init setup_acpi_sci(char *s)
1627 {
1628         if (!s)
1629                 return -EINVAL;
1630         if (!strcmp(s, "edge"))
1631                 acpi_sci_flags =  ACPI_MADT_TRIGGER_EDGE |
1632                         (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1633         else if (!strcmp(s, "level"))
1634                 acpi_sci_flags = ACPI_MADT_TRIGGER_LEVEL |
1635                         (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1636         else if (!strcmp(s, "high"))
1637                 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_HIGH |
1638                         (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1639         else if (!strcmp(s, "low"))
1640                 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_LOW |
1641                         (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1642         else
1643                 return -EINVAL;
1644         return 0;
1645 }
1646 early_param("acpi_sci", setup_acpi_sci);
1647
1648 int __acpi_acquire_global_lock(unsigned int *lock)
1649 {
1650         unsigned int old, new, val;
1651         do {
1652                 old = *lock;
1653                 new = (((old & ~0x3) + 2) + ((old >> 1) & 0x1));
1654                 val = cmpxchg(lock, old, new);
1655         } while (unlikely (val != old));
1656         return (new < 3) ? -1 : 0;
1657 }
1658
1659 int __acpi_release_global_lock(unsigned int *lock)
1660 {
1661         unsigned int old, new, val;
1662         do {
1663                 old = *lock;
1664                 new = old & ~0x3;
1665                 val = cmpxchg(lock, old, new);
1666         } while (unlikely (val != old));
1667         return old & 0x1;
1668 }