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