arch/x86/kernel/acpi/boot.c

   1 /*
   2  *  boot.c - Architecture-Specific Low-Level ACPI Boot Support
   3  *
   4  *  Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
   5  *  Copyright (C) 2001 Jun Nakajima <jun.nakajima@intel.com>
   6  *
   7  * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   8  *
   9  *  This program is free software; you can redistribute it and/or modify
  10  *  it under the terms of the GNU General Public License as published by
  11  *  the Free Software Foundation; either version 2 of the License, or
  12  *  (at your option) any later version.
  13  *
  14  *  This program is distributed in the hope that it will be useful,
  15  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  *  GNU General Public License for more details.
  18  *
  19  *  You should have received a copy of the GNU General Public License
  20  *  along with this program; if not, write to the Free Software
  21  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  22  *
  23  * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  24  */
  25
  26 #include <linux/init.h>
  27 #include <linux/acpi.h>
  28 #include <linux/acpi_pmtmr.h>
  29 #include <linux/efi.h>
  30 #include <linux/cpumask.h>
  31 #include <linux/module.h>
  32 #include <linux/dmi.h>
  33 #include <linux/irq.h>
  34 #include <linux/bootmem.h>
  35 #include <linux/ioport.h>
  36 #include <linux/pci.h>
  37
  38 #include <asm/pgtable.h>
  39 #include <asm/io_apic.h>
  40 #include <asm/apic.h>
  41 #include <asm/io.h>
  42 #include <asm/mpspec.h>
  43 #include <asm/smp.h>
  44
  45 static int __initdata acpi_force = 0;
  46 u32 acpi_rsdt_forced;
  47 int acpi_disabled;
  48 EXPORT_SYMBOL(acpi_disabled);
  49
  50 #ifdef  CONFIG_X86_64
  51 # include <asm/proto.h>
  52 #endif                          /* X86 */
  53
  54 #define BAD_MADT_ENTRY(entry, end) (                                        \
  55                 (!entry) || (unsigned long)entry + sizeof(*entry) > end ||  \
  56                 ((struct acpi_subtable_header *)entry)->length < sizeof(*entry))
  57
  58 #define PREFIX                  "ACPI: "
  59
  60 int acpi_noirq;                         /* skip ACPI IRQ initialization */
  61 int acpi_pci_disabled;          /* skip ACPI PCI scan and IRQ initialization */
  62 EXPORT_SYMBOL(acpi_pci_disabled);
  63 int acpi_ht __initdata = 1;     /* enable HT */
  64
  65 int acpi_lapic;
  66 int acpi_ioapic;
  67 int acpi_strict;
  68
  69 u8 acpi_sci_flags __initdata;
  70 int acpi_sci_override_gsi __initdata;
  71 int acpi_skip_timer_override __initdata;
  72 int acpi_use_timer_override __initdata;
  73 int acpi_fix_pin2_polarity __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 (intsrc->source_irq == 0 && intsrc->global_irq == 2) {
 365                 if (acpi_skip_timer_override) {
 366                         printk(PREFIX "BIOS IRQ0 pin2 override ignored.\n");
 367                         return 0;
 368                 }
 369                 if (acpi_fix_pin2_polarity && (intsrc->inti_flags & ACPI_MADT_POLARITY_MASK)) {
 370                         intsrc->inti_flags &= ~ACPI_MADT_POLARITY_MASK;
 371                         printk(PREFIX "BIOS IRQ0 pin2 override: forcing polarity to high active.\n");
 372                 }
 373         }
 374
 375         mp_override_legacy_irq(intsrc->source_irq,
 376                                 intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
 377                                 (intsrc->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2,
 378                                 intsrc->global_irq);
 379
 380         return 0;
 381 }
 382
 383 static int __init
 384 acpi_parse_nmi_src(struct acpi_subtable_header * header, const unsigned long end)
 385 {
 386         struct acpi_madt_nmi_source *nmi_src = NULL;
 387
 388         nmi_src = (struct acpi_madt_nmi_source *)header;
 389
 390         if (BAD_MADT_ENTRY(nmi_src, end))
 391                 return -EINVAL;
 392
 393         acpi_table_print_madt_entry(header);
 394
 395         /* TBD: Support nimsrc entries? */
 396
 397         return 0;
 398 }
 399
 400 #endif                          /* CONFIG_X86_IO_APIC */
 401
 402 /*
 403  * acpi_pic_sci_set_trigger()
 404  *
 405  * use ELCR to set PIC-mode trigger type for SCI
 406  *
 407  * If a PIC-mode SCI is not recognized or gives spurious IRQ7's
 408  * it may require Edge Trigger -- use "acpi_sci=edge"
 409  *
 410  * Port 0x4d0-4d1 are ECLR1 and ECLR2, the Edge/Level Control Registers
 411  * for the 8259 PIC.  bit[n] = 1 means irq[n] is Level, otherwise Edge.
 412  * ECLR1 is IRQs 0-7 (IRQ 0, 1, 2 must be 0)
 413  * ECLR2 is IRQs 8-15 (IRQ 8, 13 must be 0)
 414  */
 415
 416 void __init acpi_pic_sci_set_trigger(unsigned int irq, u16 trigger)
 417 {
 418         unsigned int mask = 1 << irq;
 419         unsigned int old, new;
 420
 421         /* Real old ELCR mask */
 422         old = inb(0x4d0) | (inb(0x4d1) << 8);
 423
 424         /*
 425          * If we use ACPI to set PCI IRQs, then we should clear ELCR
 426          * since we will set it correctly as we enable the PCI irq
 427          * routing.
 428          */
 429         new = acpi_noirq ? old : 0;
 430
 431         /*
 432          * Update SCI information in the ELCR, it isn't in the PCI
 433          * routing tables..
 434          */
 435         switch (trigger) {
 436         case 1:         /* Edge - clear */
 437                 new &= ~mask;
 438                 break;
 439         case 3:         /* Level - set */
 440                 new |= mask;
 441                 break;
 442         }
 443
 444         if (old == new)
 445                 return;
 446
 447         printk(PREFIX "setting ELCR to %04x (from %04x)\n", new, old);
 448         outb(new, 0x4d0);
 449         outb(new >> 8, 0x4d1);
 450 }
 451
 452 int acpi_gsi_to_irq(u32 gsi, unsigned int *irq)
 453 {
 454         *irq = gsi;
 455
 456 #ifdef CONFIG_X86_IO_APIC
 457         if (acpi_irq_model == ACPI_IRQ_MODEL_IOAPIC)
 458                 setup_IO_APIC_irq_extra(gsi);
 459 #endif
 460
 461         return 0;
 462 }
 463
 464 /*
 465  * success: return IRQ number (>=0)
 466  * failure: return < 0
 467  */
 468 int acpi_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity)
 469 {
 470         unsigned int irq;
 471         unsigned int plat_gsi = gsi;
 472
 473 #ifdef CONFIG_PCI
 474         /*
 475          * Make sure all (legacy) PCI IRQs are set as level-triggered.
 476          */
 477         if (acpi_irq_model == ACPI_IRQ_MODEL_PIC) {
 478                 if (trigger == ACPI_LEVEL_SENSITIVE)
 479                         eisa_set_level_irq(gsi);
 480         }
 481 #endif
 482
 483 #ifdef CONFIG_X86_IO_APIC
 484         if (acpi_irq_model == ACPI_IRQ_MODEL_IOAPIC) {
 485                 plat_gsi = mp_register_gsi(dev, gsi, trigger, polarity);
 486         }
 487 #endif
 488         irq = plat_gsi;
 489
 490         return irq;
 491 }
 492
 493 /*
 494  *  ACPI based hotplug support for CPU
 495  */
 496 #ifdef CONFIG_ACPI_HOTPLUG_CPU
 497
 498 static int __cpuinit _acpi_map_lsapic(acpi_handle handle, int *pcpu)
 499 {
 500         struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
 501         union acpi_object *obj;
 502         struct acpi_madt_local_apic *lapic;
 503         cpumask_var_t tmp_map, new_map;
 504         u8 physid;
 505         int cpu;
 506         int retval = -ENOMEM;
 507
 508         if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer)))
 509                 return -EINVAL;
 510
 511         if (!buffer.length || !buffer.pointer)
 512                 return -EINVAL;
 513
 514         obj = buffer.pointer;
 515         if (obj->type != ACPI_TYPE_BUFFER ||
 516             obj->buffer.length < sizeof(*lapic)) {
 517                 kfree(buffer.pointer);
 518                 return -EINVAL;
 519         }
 520
 521         lapic = (struct acpi_madt_local_apic *)obj->buffer.pointer;
 522
 523         if (lapic->header.type != ACPI_MADT_TYPE_LOCAL_APIC ||
 524             !(lapic->lapic_flags & ACPI_MADT_ENABLED)) {
 525                 kfree(buffer.pointer);
 526                 return -EINVAL;
 527         }
 528
 529         physid = lapic->id;
 530
 531         kfree(buffer.pointer);
 532         buffer.length = ACPI_ALLOCATE_BUFFER;
 533         buffer.pointer = NULL;
 534
 535         if (!alloc_cpumask_var(&tmp_map, GFP_KERNEL))
 536                 goto out;
 537
 538         if (!alloc_cpumask_var(&new_map, GFP_KERNEL))
 539                 goto free_tmp_map;
 540
 541         cpumask_copy(tmp_map, cpu_present_mask);
 542         acpi_register_lapic(physid, lapic->lapic_flags & ACPI_MADT_ENABLED);
 543
 544         /*
 545          * If mp_register_lapic successfully generates a new logical cpu
 546          * number, then the following will get us exactly what was mapped
 547          */
 548         cpumask_andnot(new_map, cpu_present_mask, tmp_map);
 549         if (cpumask_empty(new_map)) {
 550                 printk ("Unable to map lapic to logical cpu number\n");
 551                 retval = -EINVAL;
 552                 goto free_new_map;
 553         }
 554
 555         cpu = cpumask_first(new_map);
 556
 557         *pcpu = cpu;
 558         retval = 0;
 559
 560 free_new_map:
 561         free_cpumask_var(new_map);
 562 free_tmp_map:
 563         free_cpumask_var(tmp_map);
 564 out:
 565         return retval;
 566 }
 567
 568 /* wrapper to silence section mismatch warning */
 569 int __ref acpi_map_lsapic(acpi_handle handle, int *pcpu)
 570 {
 571         return _acpi_map_lsapic(handle, pcpu);
 572 }
 573 EXPORT_SYMBOL(acpi_map_lsapic);
 574
 575 int acpi_unmap_lsapic(int cpu)
 576 {
 577         per_cpu(x86_cpu_to_apicid, cpu) = -1;
 578         set_cpu_present(cpu, false);
 579         num_processors--;
 580
 581         return (0);
 582 }
 583
 584 EXPORT_SYMBOL(acpi_unmap_lsapic);
 585 #endif                          /* CONFIG_ACPI_HOTPLUG_CPU */
 586
 587 int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base)
 588 {
 589         /* TBD */
 590         return -EINVAL;
 591 }
 592
 593 EXPORT_SYMBOL(acpi_register_ioapic);
 594
 595 int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base)
 596 {
 597         /* TBD */
 598         return -EINVAL;
 599 }
 600
 601 EXPORT_SYMBOL(acpi_unregister_ioapic);
 602
 603 static int __init acpi_parse_sbf(struct acpi_table_header *table)
 604 {
 605         struct acpi_table_boot *sb;
 606
 607         sb = (struct acpi_table_boot *)table;
 608         if (!sb) {
 609                 printk(KERN_WARNING PREFIX "Unable to map SBF\n");
 610                 return -ENODEV;
 611         }
 612
 613         sbf_port = sb->cmos_index;      /* Save CMOS port */
 614
 615         return 0;
 616 }
 617
 618 #ifdef CONFIG_HPET_TIMER
 619 #include <asm/hpet.h>
 620
 621 static struct __initdata resource *hpet_res;
 622
 623 static int __init acpi_parse_hpet(struct acpi_table_header *table)
 624 {
 625         struct acpi_table_hpet *hpet_tbl;
 626
 627         hpet_tbl = (struct acpi_table_hpet *)table;
 628         if (!hpet_tbl) {
 629                 printk(KERN_WARNING PREFIX "Unable to map HPET\n");
 630                 return -ENODEV;
 631         }
 632
 633         if (hpet_tbl->address.space_id != ACPI_SPACE_MEM) {
 634                 printk(KERN_WARNING PREFIX "HPET timers must be located in "
 635                        "memory.\n");
 636                 return -1;
 637         }
 638
 639         hpet_address = hpet_tbl->address.address;
 640
 641         /*
 642          * Some broken BIOSes advertise HPET at 0x0. We really do not
 643          * want to allocate a resource there.
 644          */
 645         if (!hpet_address) {
 646                 printk(KERN_WARNING PREFIX
 647                        "HPET id: %#x base: %#lx is invalid\n",
 648                        hpet_tbl->id, hpet_address);
 649                 return 0;
 650         }
 651 #ifdef CONFIG_X86_64
 652         /*
 653          * Some even more broken BIOSes advertise HPET at
 654          * 0xfed0000000000000 instead of 0xfed00000. Fix it up and add
 655          * some noise:
 656          */
 657         if (hpet_address == 0xfed0000000000000UL) {
 658                 if (!hpet_force_user) {
 659                         printk(KERN_WARNING PREFIX "HPET id: %#x "
 660                                "base: 0xfed0000000000000 is bogus\n "
 661                                "try hpet=force on the kernel command line to "
 662                                "fix it up to 0xfed00000.\n", hpet_tbl->id);
 663                         hpet_address = 0;
 664                         return 0;
 665                 }
 666                 printk(KERN_WARNING PREFIX
 667                        "HPET id: %#x base: 0xfed0000000000000 fixed up "
 668                        "to 0xfed00000.\n", hpet_tbl->id);
 669                 hpet_address >>= 32;
 670         }
 671 #endif
 672         printk(KERN_INFO PREFIX "HPET id: %#x base: %#lx\n",
 673                hpet_tbl->id, hpet_address);
 674
 675         /*
 676          * Allocate and initialize the HPET firmware resource for adding into
 677          * the resource tree during the lateinit timeframe.
 678          */
 679 #define HPET_RESOURCE_NAME_SIZE 9
 680         hpet_res = alloc_bootmem(sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE);
 681
 682         hpet_res->name = (void *)&hpet_res[1];
 683         hpet_res->flags = IORESOURCE_MEM;
 684         snprintf((char *)hpet_res->name, HPET_RESOURCE_NAME_SIZE, "HPET %u",
 685                  hpet_tbl->sequence);
 686
 687         hpet_res->start = hpet_address;
 688         hpet_res->end = hpet_address + (1 * 1024) - 1;
 689
 690         return 0;
 691 }
 692
 693 /*
 694  * hpet_insert_resource inserts the HPET resources used into the resource
 695  * tree.
 696  */
 697 static __init int hpet_insert_resource(void)
 698 {
 699         if (!hpet_res)
 700                 return 1;
 701
 702         return insert_resource(&iomem_resource, hpet_res);
 703 }
 704
 705 late_initcall(hpet_insert_resource);
 706
 707 #else
 708 #define acpi_parse_hpet NULL
 709 #endif
 710
 711 static int __init acpi_parse_fadt(struct acpi_table_header *table)
 712 {
 713
 714 #ifdef CONFIG_X86_PM_TIMER
 715         /* detect the location of the ACPI PM Timer */
 716         if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID) {
 717                 /* FADT rev. 2 */
 718                 if (acpi_gbl_FADT.xpm_timer_block.space_id !=
 719                     ACPI_ADR_SPACE_SYSTEM_IO)
 720                         return 0;
 721
 722                 pmtmr_ioport = acpi_gbl_FADT.xpm_timer_block.address;
 723                 /*
 724                  * "X" fields are optional extensions to the original V1.0
 725                  * fields, so we must selectively expand V1.0 fields if the
 726                  * corresponding X field is zero.
 727                  */
 728                 if (!pmtmr_ioport)
 729                         pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
 730         } else {
 731                 /* FADT rev. 1 */
 732                 pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;
 733         }
 734         if (pmtmr_ioport)
 735                 printk(KERN_INFO PREFIX "PM-Timer IO Port: %#x\n",
 736                        pmtmr_ioport);
 737 #endif
 738         return 0;
 739 }
 740
 741 #ifdef  CONFIG_X86_LOCAL_APIC
 742 /*
 743  * Parse LAPIC entries in MADT
 744  * returns 0 on success, < 0 on error
 745  */
 746
 747 static void __init acpi_register_lapic_address(unsigned long address)
 748 {
 749         mp_lapic_addr = address;
 750
 751         set_fixmap_nocache(FIX_APIC_BASE, address);
 752         if (boot_cpu_physical_apicid == -1U) {
 753                 boot_cpu_physical_apicid  = read_apic_id();
 754                 apic_version[boot_cpu_physical_apicid] =
 755                          GET_APIC_VERSION(apic_read(APIC_LVR));
 756         }
 757 }
 758
 759 static int __init early_acpi_parse_madt_lapic_addr_ovr(void)
 760 {
 761         int count;
 762
 763         if (!cpu_has_apic)
 764                 return -ENODEV;
 765
 766         /*
 767          * Note that the LAPIC address is obtained from the MADT (32-bit value)
 768          * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value).
 769          */
 770
 771         count =
 772             acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
 773                                   acpi_parse_lapic_addr_ovr, 0);
 774         if (count < 0) {
 775                 printk(KERN_ERR PREFIX
 776                        "Error parsing LAPIC address override entry\n");
 777                 return count;
 778         }
 779
 780         acpi_register_lapic_address(acpi_lapic_addr);
 781
 782         return count;
 783 }
 784
 785 static int __init acpi_parse_madt_lapic_entries(void)
 786 {
 787         int count;
 788         int x2count = 0;
 789
 790         if (!cpu_has_apic)
 791                 return -ENODEV;
 792
 793         /*
 794          * Note that the LAPIC address is obtained from the MADT (32-bit value)
 795          * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value).
 796          */
 797
 798         count =
 799             acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
 800                                   acpi_parse_lapic_addr_ovr, 0);
 801         if (count < 0) {
 802                 printk(KERN_ERR PREFIX
 803                        "Error parsing LAPIC address override entry\n");
 804                 return count;
 805         }
 806
 807         acpi_register_lapic_address(acpi_lapic_addr);
 808
 809         count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC,
 810                                       acpi_parse_sapic, MAX_APICS);
 811
 812         if (!count) {
 813                 x2count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC,
 814                                                 acpi_parse_x2apic, MAX_APICS);
 815                 count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC,
 816                                               acpi_parse_lapic, MAX_APICS);
 817         }
 818         if (!count && !x2count) {
 819                 printk(KERN_ERR PREFIX "No LAPIC entries present\n");
 820                 /* TBD: Cleanup to allow fallback to MPS */
 821                 return -ENODEV;
 822         } else if (count < 0 || x2count < 0) {
 823                 printk(KERN_ERR PREFIX "Error parsing LAPIC entry\n");
 824                 /* TBD: Cleanup to allow fallback to MPS */
 825                 return count;
 826         }
 827
 828         x2count =
 829             acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC_NMI,
 830                                   acpi_parse_x2apic_nmi, 0);
 831         count =
 832             acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI, acpi_parse_lapic_nmi, 0);
 833         if (count < 0 || x2count < 0) {
 834                 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n");
 835                 /* TBD: Cleanup to allow fallback to MPS */
 836                 return count;
 837         }
 838         return 0;
 839 }
 840 #endif                          /* CONFIG_X86_LOCAL_APIC */
 841
 842 #ifdef  CONFIG_X86_IO_APIC
 843 #define MP_ISA_BUS              0
 844
 845 #ifdef CONFIG_X86_ES7000
 846 extern int es7000_plat;
 847 #endif
 848
 849 int __init acpi_probe_gsi(void)
 850 {
 851         int idx;
 852         int gsi;
 853         int max_gsi = 0;
 854
 855         if (acpi_disabled)
 856                 return 0;
 857
 858         if (!acpi_ioapic)
 859                 return 0;
 860
 861         max_gsi = 0;
 862         for (idx = 0; idx < nr_ioapics; idx++) {
 863                 gsi = mp_gsi_routing[idx].gsi_end;
 864
 865                 if (gsi > max_gsi)
 866                         max_gsi = gsi;
 867         }
 868
 869         return max_gsi + 1;
 870 }
 871
 872 static void assign_to_mp_irq(struct mpc_intsrc *m,
 873                                     struct mpc_intsrc *mp_irq)
 874 {
 875         memcpy(mp_irq, m, sizeof(struct mpc_intsrc));
 876 }
 877
 878 static int mp_irq_cmp(struct mpc_intsrc *mp_irq,
 879                                 struct mpc_intsrc *m)
 880 {
 881         return memcmp(mp_irq, m, sizeof(struct mpc_intsrc));
 882 }
 883
 884 static void save_mp_irq(struct mpc_intsrc *m)
 885 {
 886         int i;
 887
 888         for (i = 0; i < mp_irq_entries; i++) {
 889                 if (!mp_irq_cmp(&mp_irqs[i], m))
 890                         return;
 891         }
 892
 893         assign_to_mp_irq(m, &mp_irqs[mp_irq_entries]);
 894         if (++mp_irq_entries == MAX_IRQ_SOURCES)
 895                 panic("Max # of irq sources exceeded!!\n");
 896 }
 897
 898 void __init mp_override_legacy_irq(u8 bus_irq, u8 polarity, u8 trigger, u32 gsi)
 899 {
 900         int ioapic;
 901         int pin;
 902         struct mpc_intsrc mp_irq;
 903
 904         /*
 905          * Convert 'gsi' to 'ioapic.pin'.
 906          */
 907         ioapic = mp_find_ioapic(gsi);
 908         if (ioapic < 0)
 909                 return;
 910         pin = mp_find_ioapic_pin(ioapic, gsi);
 911
 912         /*
 913          * TBD: This check is for faulty timer entries, where the override
 914          *      erroneously sets the trigger to level, resulting in a HUGE
 915          *      increase of timer interrupts!
 916          */
 917         if ((bus_irq == 0) && (trigger == 3))
 918                 trigger = 1;
 919
 920         mp_irq.type = MP_INTSRC;
 921         mp_irq.irqtype = mp_INT;
 922         mp_irq.irqflag = (trigger << 2) | polarity;
 923         mp_irq.srcbus = MP_ISA_BUS;
 924         mp_irq.srcbusirq = bus_irq;     /* IRQ */
 925         mp_irq.dstapic = mp_ioapics[ioapic].apicid; /* APIC ID */
 926         mp_irq.dstirq = pin;    /* INTIN# */
 927
 928         save_mp_irq(&mp_irq);
 929 }
 930
 931 void __init mp_config_acpi_legacy_irqs(void)
 932 {
 933         int i;
 934         int ioapic;
 935         unsigned int dstapic;
 936         struct mpc_intsrc mp_irq;
 937
 938 #if defined (CONFIG_MCA) || defined (CONFIG_EISA)
 939         /*
 940          * Fabricate the legacy ISA bus (bus #31).
 941          */
 942         mp_bus_id_to_type[MP_ISA_BUS] = MP_BUS_ISA;
 943 #endif
 944         set_bit(MP_ISA_BUS, mp_bus_not_pci);
 945         pr_debug("Bus #%d is ISA\n", MP_ISA_BUS);
 946
 947 #ifdef CONFIG_X86_ES7000
 948         /*
 949          * Older generations of ES7000 have no legacy identity mappings
 950          */
 951         if (es7000_plat == 1)
 952                 return;
 953 #endif
 954
 955         /*
 956          * Locate the IOAPIC that manages the ISA IRQs (0-15).
 957          */
 958         ioapic = mp_find_ioapic(0);
 959         if (ioapic < 0)
 960                 return;
 961         dstapic = mp_ioapics[ioapic].apicid;
 962
 963         /*
 964          * Use the default configuration for the IRQs 0-15.  Unless
 965          * overridden by (MADT) interrupt source override entries.
 966          */
 967         for (i = 0; i < 16; i++) {
 968                 int idx;
 969
 970                 for (idx = 0; idx < mp_irq_entries; idx++) {
 971                         struct mpc_intsrc *irq = mp_irqs + idx;
 972
 973                         /* Do we already have a mapping for this ISA IRQ? */
 974                         if (irq->srcbus == MP_ISA_BUS && irq->srcbusirq == i)
 975                                 break;
 976
 977                         /* Do we already have a mapping for this IOAPIC pin */
 978                         if (irq->dstapic == dstapic && irq->dstirq == i)
 979                                 break;
 980                 }
 981
 982                 if (idx != mp_irq_entries) {
 983                         printk(KERN_DEBUG "ACPI: IRQ%d used by override.\n", i);
 984                         continue;       /* IRQ already used */
 985                 }
 986
 987                 mp_irq.type = MP_INTSRC;
 988                 mp_irq.irqflag = 0;     /* Conforming */
 989                 mp_irq.srcbus = MP_ISA_BUS;
 990                 mp_irq.dstapic = dstapic;
 991                 mp_irq.irqtype = mp_INT;
 992                 mp_irq.srcbusirq = i; /* Identity mapped */
 993                 mp_irq.dstirq = i;
 994
 995                 save_mp_irq(&mp_irq);
 996         }
 997 }
 998
 999 static int mp_config_acpi_gsi(struct device *dev, u32 gsi, int trigger,
1000                         int polarity)
1001 {
1002 #ifdef CONFIG_X86_MPPARSE
1003         struct mpc_intsrc mp_irq;
1004         struct pci_dev *pdev;
1005         unsigned char number;
1006         unsigned int devfn;
1007         int ioapic;
1008         u8 pin;
1009
1010         if (!acpi_ioapic)
1011                 return 0;
1012         if (!dev)
1013                 return 0;
1014         if (dev->bus != &pci_bus_type)
1015                 return 0;
1016
1017         pdev = to_pci_dev(dev);
1018         number = pdev->bus->number;
1019         devfn = pdev->devfn;
1020         pin = pdev->pin;
1021         /* print the entry should happen on mptable identically */
1022         mp_irq.type = MP_INTSRC;
1023         mp_irq.irqtype = mp_INT;
1024         mp_irq.irqflag = (trigger == ACPI_EDGE_SENSITIVE ? 4 : 0x0c) |
1025                                 (polarity == ACPI_ACTIVE_HIGH ? 1 : 3);
1026         mp_irq.srcbus = number;
1027         mp_irq.srcbusirq = (((devfn >> 3) & 0x1f) << 2) | ((pin - 1) & 3);
1028         ioapic = mp_find_ioapic(gsi);
1029         mp_irq.dstapic = mp_ioapics[ioapic].apicid;
1030         mp_irq.dstirq = mp_find_ioapic_pin(ioapic, gsi);
1031
1032         save_mp_irq(&mp_irq);
1033 #endif
1034         return 0;
1035 }
1036
1037 int mp_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity)
1038 {
1039         int ioapic;
1040         int ioapic_pin;
1041         struct io_apic_irq_attr irq_attr;
1042
1043         if (acpi_irq_model != ACPI_IRQ_MODEL_IOAPIC)
1044                 return gsi;
1045
1046         /* Don't set up the ACPI SCI because it's already set up */
1047         if (acpi_gbl_FADT.sci_interrupt == gsi)
1048                 return gsi;
1049
1050         ioapic = mp_find_ioapic(gsi);
1051         if (ioapic < 0) {
1052                 printk(KERN_WARNING "No IOAPIC for GSI %u\n", gsi);
1053                 return gsi;
1054         }
1055
1056         ioapic_pin = mp_find_ioapic_pin(ioapic, gsi);
1057
1058 #ifdef CONFIG_X86_32
1059         if (ioapic_renumber_irq)
1060                 gsi = ioapic_renumber_irq(ioapic, gsi);
1061 #endif
1062
1063         if (ioapic_pin > MP_MAX_IOAPIC_PIN) {
1064                 printk(KERN_ERR "Invalid reference to IOAPIC pin "
1065                        "%d-%d\n", mp_ioapics[ioapic].apicid,
1066                        ioapic_pin);
1067                 return gsi;
1068         }
1069
1070         if (enable_update_mptable)
1071                 mp_config_acpi_gsi(dev, gsi, trigger, polarity);
1072
1073         set_io_apic_irq_attr(&irq_attr, ioapic, ioapic_pin,
1074                              trigger == ACPI_EDGE_SENSITIVE ? 0 : 1,
1075                              polarity == ACPI_ACTIVE_HIGH ? 0 : 1);
1076         io_apic_set_pci_routing(dev, gsi, &irq_attr);
1077
1078         return gsi;
1079 }
1080
1081 /*
1082  * Parse IOAPIC related entries in MADT
1083  * returns 0 on success, < 0 on error
1084  */
1085 static int __init acpi_parse_madt_ioapic_entries(void)
1086 {
1087         int count;
1088
1089         /*
1090          * ACPI interpreter is required to complete interrupt setup,
1091          * so if it is off, don't enumerate the io-apics with ACPI.
1092          * If MPS is present, it will handle them,
1093          * otherwise the system will stay in PIC mode
1094          */
1095         if (acpi_disabled || acpi_noirq)
1096                 return -ENODEV;
1097
1098         if (!cpu_has_apic)
1099                 return -ENODEV;
1100
1101         /*
1102          * if "noapic" boot option, don't look for IO-APICs
1103          */
1104         if (skip_ioapic_setup) {
1105                 printk(KERN_INFO PREFIX "Skipping IOAPIC probe "
1106                        "due to 'noapic' option.\n");
1107                 return -ENODEV;
1108         }
1109
1110         count =
1111             acpi_table_parse_madt(ACPI_MADT_TYPE_IO_APIC, acpi_parse_ioapic,
1112                                   MAX_IO_APICS);
1113         if (!count) {
1114                 printk(KERN_ERR PREFIX "No IOAPIC entries present\n");
1115                 return -ENODEV;
1116         } else if (count < 0) {
1117                 printk(KERN_ERR PREFIX "Error parsing IOAPIC entry\n");
1118                 return count;
1119         }
1120
1121         count =
1122             acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE, acpi_parse_int_src_ovr,
1123                                   nr_irqs);
1124         if (count < 0) {
1125                 printk(KERN_ERR PREFIX
1126                        "Error parsing interrupt source overrides entry\n");
1127                 /* TBD: Cleanup to allow fallback to MPS */
1128                 return count;
1129         }
1130
1131         /*
1132          * If BIOS did not supply an INT_SRC_OVR for the SCI
1133          * pretend we got one so we can set the SCI flags.
1134          */
1135         if (!acpi_sci_override_gsi)
1136                 acpi_sci_ioapic_setup(acpi_gbl_FADT.sci_interrupt, 0, 0);
1137
1138         /* Fill in identity legacy mapings where no override */
1139         mp_config_acpi_legacy_irqs();
1140
1141         count =
1142             acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE, acpi_parse_nmi_src,
1143                                   nr_irqs);
1144         if (count < 0) {
1145                 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n");
1146                 /* TBD: Cleanup to allow fallback to MPS */
1147                 return count;
1148         }
1149
1150         return 0;
1151 }
1152 #else
1153 static inline int acpi_parse_madt_ioapic_entries(void)
1154 {
1155         return -1;
1156 }
1157 #endif  /* !CONFIG_X86_IO_APIC */
1158
1159 static void __init early_acpi_process_madt(void)
1160 {
1161 #ifdef CONFIG_X86_LOCAL_APIC
1162         int error;
1163
1164         if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1165
1166                 /*
1167                  * Parse MADT LAPIC entries
1168                  */
1169                 error = early_acpi_parse_madt_lapic_addr_ovr();
1170                 if (!error) {
1171                         acpi_lapic = 1;
1172                         smp_found_config = 1;
1173                 }
1174                 if (error == -EINVAL) {
1175                         /*
1176                          * Dell Precision Workstation 410, 610 come here.
1177                          */
1178                         printk(KERN_ERR PREFIX
1179                                "Invalid BIOS MADT, disabling ACPI\n");
1180                         disable_acpi();
1181                 }
1182         }
1183 #endif
1184 }
1185
1186 static void __init acpi_process_madt(void)
1187 {
1188 #ifdef CONFIG_X86_LOCAL_APIC
1189         int error;
1190
1191         if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {
1192
1193                 /*
1194                  * Parse MADT LAPIC entries
1195                  */
1196                 error = acpi_parse_madt_lapic_entries();
1197                 if (!error) {
1198                         acpi_lapic = 1;
1199
1200                         /*
1201                          * Parse MADT IO-APIC entries
1202                          */
1203                         error = acpi_parse_madt_ioapic_entries();
1204                         if (!error) {
1205                                 acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC;
1206                                 acpi_ioapic = 1;
1207
1208                                 smp_found_config = 1;
1209                         }
1210                 }
1211                 if (error == -EINVAL) {
1212                         /*
1213                          * Dell Precision Workstation 410, 610 come here.
1214                          */
1215                         printk(KERN_ERR PREFIX
1216                                "Invalid BIOS MADT, disabling ACPI\n");
1217                         disable_acpi();
1218                 }
1219         } else {
1220                 /*
1221                  * ACPI found no MADT, and so ACPI wants UP PIC mode.
1222                  * In the event an MPS table was found, forget it.
1223                  * Boot with "acpi=off" to use MPS on such a system.
1224                  */
1225                 if (smp_found_config) {
1226                         printk(KERN_WARNING PREFIX
1227                                 "No APIC-table, disabling MPS\n");
1228                         smp_found_config = 0;
1229                 }
1230         }
1231
1232         /*
1233          * ACPI supports both logical (e.g. Hyper-Threading) and physical
1234          * processors, where MPS only supports physical.
1235          */
1236         if (acpi_lapic && acpi_ioapic)
1237                 printk(KERN_INFO "Using ACPI (MADT) for SMP configuration "
1238                        "information\n");
1239         else if (acpi_lapic)
1240                 printk(KERN_INFO "Using ACPI for processor (LAPIC) "
1241                        "configuration information\n");
1242 #endif
1243         return;
1244 }
1245
1246 static int __init disable_acpi_irq(const struct dmi_system_id *d)
1247 {
1248         if (!acpi_force) {
1249                 printk(KERN_NOTICE "%s detected: force use of acpi=noirq\n",
1250                        d->ident);
1251                 acpi_noirq_set();
1252         }
1253         return 0;
1254 }
1255
1256 static int __init disable_acpi_pci(const struct dmi_system_id *d)
1257 {
1258         if (!acpi_force) {
1259                 printk(KERN_NOTICE "%s detected: force use of pci=noacpi\n",
1260                        d->ident);
1261                 acpi_disable_pci();
1262         }
1263         return 0;
1264 }
1265
1266 static int __init dmi_disable_acpi(const struct dmi_system_id *d)
1267 {
1268         if (!acpi_force) {
1269                 printk(KERN_NOTICE "%s detected: acpi off\n", d->ident);
1270                 disable_acpi();
1271         } else {
1272                 printk(KERN_NOTICE
1273                        "Warning: DMI blacklist says broken, but acpi forced\n");
1274         }
1275         return 0;
1276 }
1277
1278 /*
1279  * Limit ACPI to CPU enumeration for HT
1280  */
1281 static int __init force_acpi_ht(const struct dmi_system_id *d)
1282 {
1283         if (!acpi_force) {
1284                 printk(KERN_NOTICE "%s detected: force use of acpi=ht\n",
1285                        d->ident);
1286                 disable_acpi();
1287                 acpi_ht = 1;
1288         } else {
1289                 printk(KERN_NOTICE
1290                        "Warning: acpi=force overrules DMI blacklist: acpi=ht\n");
1291         }
1292         return 0;
1293 }
1294
1295 /*
1296  * Force ignoring BIOS IRQ0 pin2 override
1297  */
1298 static int __init dmi_ignore_irq0_timer_override(const struct dmi_system_id *d)
1299 {
1300         /*
1301          * The ati_ixp4x0_rev() early PCI quirk should have set
1302          * the acpi_skip_timer_override flag already:
1303          */
1304         if (!acpi_skip_timer_override) {
1305                 WARN(1, KERN_ERR "ati_ixp4x0 quirk not complete.\n");
1306                 pr_notice("%s detected: Ignoring BIOS IRQ0 pin2 override\n",
1307                         d->ident);
1308                 acpi_skip_timer_override = 1;
1309         }
1310         return 0;
1311 }
1312
1313 /*
1314  * If your system is blacklisted here, but you find that acpi=force
1315  * works for you, please contact linux-acpi@vger.kernel.org
1316  */
1317 static struct dmi_system_id __initdata acpi_dmi_table[] = {
1318         /*
1319          * Boxes that need ACPI disabled
1320          */
1321         {
1322          .callback = dmi_disable_acpi,
1323          .ident = "IBM Thinkpad",
1324          .matches = {
1325                      DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1326                      DMI_MATCH(DMI_BOARD_NAME, "2629H1G"),
1327                      },
1328          },
1329
1330         /*
1331          * Boxes that need acpi=ht
1332          */
1333         {
1334          .callback = force_acpi_ht,
1335          .ident = "FSC Primergy T850",
1336          .matches = {
1337                      DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
1338                      DMI_MATCH(DMI_PRODUCT_NAME, "PRIMERGY T850"),
1339                      },
1340          },
1341         {
1342          .callback = force_acpi_ht,
1343          .ident = "HP VISUALIZE NT Workstation",
1344          .matches = {
1345                      DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"),
1346                      DMI_MATCH(DMI_PRODUCT_NAME, "HP VISUALIZE NT Workstation"),
1347                      },
1348          },
1349         {
1350          .callback = force_acpi_ht,
1351          .ident = "Compaq Workstation W8000",
1352          .matches = {
1353                      DMI_MATCH(DMI_SYS_VENDOR, "Compaq"),
1354                      DMI_MATCH(DMI_PRODUCT_NAME, "Workstation W8000"),
1355                      },
1356          },
1357         {
1358          .callback = force_acpi_ht,
1359          .ident = "ASUS CUR-DLS",
1360          .matches = {
1361                      DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1362                      DMI_MATCH(DMI_BOARD_NAME, "CUR-DLS"),
1363                      },
1364          },
1365         {
1366          .callback = force_acpi_ht,
1367          .ident = "ABIT i440BX-W83977",
1368          .matches = {
1369                      DMI_MATCH(DMI_BOARD_VENDOR, "ABIT <http://www.abit.com>"),
1370                      DMI_MATCH(DMI_BOARD_NAME, "i440BX-W83977 (BP6)"),
1371                      },
1372          },
1373         {
1374          .callback = force_acpi_ht,
1375          .ident = "IBM Bladecenter",
1376          .matches = {
1377                      DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1378                      DMI_MATCH(DMI_BOARD_NAME, "IBM eServer BladeCenter HS20"),
1379                      },
1380          },
1381         {
1382          .callback = force_acpi_ht,
1383          .ident = "IBM eServer xSeries 360",
1384          .matches = {
1385                      DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1386                      DMI_MATCH(DMI_BOARD_NAME, "eServer xSeries 360"),
1387                      },
1388          },
1389         {
1390          .callback = force_acpi_ht,
1391          .ident = "IBM eserver xSeries 330",
1392          .matches = {
1393                      DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1394                      DMI_MATCH(DMI_BOARD_NAME, "eserver xSeries 330"),
1395                      },
1396          },
1397         {
1398          .callback = force_acpi_ht,
1399          .ident = "IBM eserver xSeries 440",
1400          .matches = {
1401                      DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1402                      DMI_MATCH(DMI_PRODUCT_NAME, "eserver xSeries 440"),
1403                      },
1404          },
1405
1406         /*
1407          * Boxes that need ACPI PCI IRQ routing disabled
1408          */
1409         {
1410          .callback = disable_acpi_irq,
1411          .ident = "ASUS A7V",
1412          .matches = {
1413                      DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC"),
1414                      DMI_MATCH(DMI_BOARD_NAME, "<A7V>"),
1415                      /* newer BIOS, Revision 1011, does work */
1416                      DMI_MATCH(DMI_BIOS_VERSION,
1417                                "ASUS A7V ACPI BIOS Revision 1007"),
1418                      },
1419          },
1420         {
1421                 /*
1422                  * Latest BIOS for IBM 600E (1.16) has bad pcinum
1423                  * for LPC bridge, which is needed for the PCI
1424                  * interrupt links to work. DSDT fix is in bug 5966.
1425                  * 2645, 2646 model numbers are shared with 600/600E/600X
1426                  */
1427          .callback = disable_acpi_irq,
1428          .ident = "IBM Thinkpad 600 Series 2645",
1429          .matches = {
1430                      DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1431                      DMI_MATCH(DMI_BOARD_NAME, "2645"),
1432                      },
1433          },
1434         {
1435          .callback = disable_acpi_irq,
1436          .ident = "IBM Thinkpad 600 Series 2646",
1437          .matches = {
1438                      DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1439                      DMI_MATCH(DMI_BOARD_NAME, "2646"),
1440                      },
1441          },
1442         /*
1443          * Boxes that need ACPI PCI IRQ routing and PCI scan disabled
1444          */
1445         {                       /* _BBN 0 bug */
1446          .callback = disable_acpi_pci,
1447          .ident = "ASUS PR-DLS",
1448          .matches = {
1449                      DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1450                      DMI_MATCH(DMI_BOARD_NAME, "PR-DLS"),
1451                      DMI_MATCH(DMI_BIOS_VERSION,
1452                                "ASUS PR-DLS ACPI BIOS Revision 1010"),
1453                      DMI_MATCH(DMI_BIOS_DATE, "03/21/2003")
1454                      },
1455          },
1456         {
1457          .callback = disable_acpi_pci,
1458          .ident = "Acer TravelMate 36x Laptop",
1459          .matches = {
1460                      DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
1461                      DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"),
1462                      },
1463          },
1464         {}
1465 };
1466
1467 /* second table for DMI checks that should run after early-quirks */
1468 static struct dmi_system_id __initdata acpi_dmi_table_late[] = {
1469         /*
1470          * HP laptops which use a DSDT reporting as HP/SB400/10000,
1471          * which includes some code which overrides all temperature
1472          * trip points to 16C if the INTIN2 input of the I/O APIC
1473          * is enabled.  This input is incorrectly designated the
1474          * ISA IRQ 0 via an interrupt source override even though
1475          * it is wired to the output of the master 8259A and INTIN0
1476          * is not connected at all.  Force ignoring BIOS IRQ0 pin2
1477          * override in that cases.
1478          */
1479         {
1480          .callback = dmi_ignore_irq0_timer_override,
1481          .ident = "HP nx6115 laptop",
1482          .matches = {
1483                      DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1484                      DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6115"),
1485                      },
1486          },
1487         {
1488          .callback = dmi_ignore_irq0_timer_override,
1489          .ident = "HP NX6125 laptop",
1490          .matches = {
1491                      DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1492                      DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6125"),
1493                      },
1494          },
1495         {
1496          .callback = dmi_ignore_irq0_timer_override,
1497          .ident = "HP NX6325 laptop",
1498          .matches = {
1499                      DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1500                      DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6325"),
1501                      },
1502          },
1503         {
1504          .callback = dmi_ignore_irq0_timer_override,
1505          .ident = "HP 6715b laptop",
1506          .matches = {
1507                      DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1508                      DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq 6715b"),
1509                      },
1510          },
1511         {}
1512 };
1513
1514 /*
1515  * acpi_boot_table_init() and acpi_boot_init()
1516  *  called from setup_arch(), always.
1517  *      1. checksums all tables
1518  *      2. enumerates lapics
1519  *      3. enumerates io-apics
1520  *
1521  * acpi_table_init() is separate to allow reading SRAT without
1522  * other side effects.
1523  *
1524  * side effects of acpi_boot_init:
1525  *      acpi_lapic = 1 if LAPIC found
1526  *      acpi_ioapic = 1 if IOAPIC found
1527  *      if (acpi_lapic && acpi_ioapic) smp_found_config = 1;
1528  *      if acpi_blacklisted() acpi_disabled = 1;
1529  *      acpi_irq_model=...
1530  *      ...
1531  *
1532  * return value: (currently ignored)
1533  *      0: success
1534  *      !0: failure
1535  */
1536
1537 int __init acpi_boot_table_init(void)
1538 {
1539         int error;
1540
1541         dmi_check_system(acpi_dmi_table);
1542
1543         /*
1544          * If acpi_disabled, bail out
1545          * One exception: acpi=ht continues far enough to enumerate LAPICs
1546          */
1547         if (acpi_disabled && !acpi_ht)
1548                 return 1;
1549
1550         /*
1551          * Initialize the ACPI boot-time table parser.
1552          */
1553         error = acpi_table_init();
1554         if (error) {
1555                 disable_acpi();
1556                 return error;
1557         }
1558
1559         acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1560
1561         /*
1562          * blacklist may disable ACPI entirely
1563          */
1564         error = acpi_blacklisted();
1565         if (error) {
1566                 if (acpi_force) {
1567                         printk(KERN_WARNING PREFIX "acpi=force override\n");
1568                 } else {
1569                         printk(KERN_WARNING PREFIX "Disabling ACPI support\n");
1570                         disable_acpi();
1571                         return error;
1572                 }
1573         }
1574
1575         return 0;
1576 }
1577
1578 int __init early_acpi_boot_init(void)
1579 {
1580         /*
1581          * If acpi_disabled, bail out
1582          * One exception: acpi=ht continues far enough to enumerate LAPICs
1583          */
1584         if (acpi_disabled && !acpi_ht)
1585                 return 1;
1586
1587         /*
1588          * Process the Multiple APIC Description Table (MADT), if present
1589          */
1590         early_acpi_process_madt();
1591
1592         return 0;
1593 }
1594
1595 int __init acpi_boot_init(void)
1596 {
1597         /* those are executed after early-quirks are executed */
1598         dmi_check_system(acpi_dmi_table_late);
1599
1600         /*
1601          * If acpi_disabled, bail out
1602          * One exception: acpi=ht continues far enough to enumerate LAPICs
1603          */
1604         if (acpi_disabled && !acpi_ht)
1605                 return 1;
1606
1607         acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
1608
1609         /*
1610          * set sci_int and PM timer address
1611          */
1612         acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt);
1613
1614         /*
1615          * Process the Multiple APIC Description Table (MADT), if present
1616          */
1617         acpi_process_madt();
1618
1619         acpi_table_parse(ACPI_SIG_HPET, acpi_parse_hpet);
1620
1621         return 0;
1622 }
1623
1624 static int __init parse_acpi(char *arg)
1625 {
1626         if (!arg)
1627                 return -EINVAL;
1628
1629         /* "acpi=off" disables both ACPI table parsing and interpreter */
1630         if (strcmp(arg, "off") == 0) {
1631                 disable_acpi();
1632         }
1633         /* acpi=force to over-ride black-list */
1634         else if (strcmp(arg, "force") == 0) {
1635                 acpi_force = 1;
1636                 acpi_ht = 1;
1637                 acpi_disabled = 0;
1638         }
1639         /* acpi=strict disables out-of-spec workarounds */
1640         else if (strcmp(arg, "strict") == 0) {
1641                 acpi_strict = 1;
1642         }
1643         /* Limit ACPI just to boot-time to enable HT */
1644         else if (strcmp(arg, "ht") == 0) {
1645                 if (!acpi_force)
1646                         disable_acpi();
1647                 acpi_ht = 1;
1648         }
1649         /* acpi=rsdt use RSDT instead of XSDT */
1650         else if (strcmp(arg, "rsdt") == 0) {
1651                 acpi_rsdt_forced = 1;
1652         }
1653         /* "acpi=noirq" disables ACPI interrupt routing */
1654         else if (strcmp(arg, "noirq") == 0) {
1655                 acpi_noirq_set();
1656         } else {
1657                 /* Core will printk when we return error. */
1658                 return -EINVAL;
1659         }
1660         return 0;
1661 }
1662 early_param("acpi", parse_acpi);
1663
1664 /* FIXME: Using pci= for an ACPI parameter is a travesty. */
1665 static int __init parse_pci(char *arg)
1666 {
1667         if (arg && strcmp(arg, "noacpi") == 0)
1668                 acpi_disable_pci();
1669         return 0;
1670 }
1671 early_param("pci", parse_pci);
1672
1673 int __init acpi_mps_check(void)
1674 {
1675 #if defined(CONFIG_X86_LOCAL_APIC) && !defined(CONFIG_X86_MPPARSE)
1676 /* mptable code is not built-in*/
1677         if (acpi_disabled || acpi_noirq) {
1678                 printk(KERN_WARNING "MPS support code is not built-in.\n"
1679                        "Using acpi=off or acpi=noirq or pci=noacpi "
1680                        "may have problem\n");
1681                 return 1;
1682         }
1683 #endif
1684         return 0;
1685 }
1686
1687 #ifdef CONFIG_X86_IO_APIC
1688 static int __init parse_acpi_skip_timer_override(char *arg)
1689 {
1690         acpi_skip_timer_override = 1;
1691         return 0;
1692 }
1693 early_param("acpi_skip_timer_override", parse_acpi_skip_timer_override);
1694
1695 static int __init parse_acpi_use_timer_override(char *arg)
1696 {
1697         acpi_use_timer_override = 1;
1698         return 0;
1699 }
1700 early_param("acpi_use_timer_override", parse_acpi_use_timer_override);
1701 #endif /* CONFIG_X86_IO_APIC */
1702
1703 static int __init setup_acpi_sci(char *s)
1704 {
1705         if (!s)
1706                 return -EINVAL;
1707         if (!strcmp(s, "edge"))
1708                 acpi_sci_flags =  ACPI_MADT_TRIGGER_EDGE |
1709                         (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1710         else if (!strcmp(s, "level"))
1711                 acpi_sci_flags = ACPI_MADT_TRIGGER_LEVEL |
1712                         (acpi_sci_flags & ~ACPI_MADT_TRIGGER_MASK);
1713         else if (!strcmp(s, "high"))
1714                 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_HIGH |
1715                         (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1716         else if (!strcmp(s, "low"))
1717                 acpi_sci_flags = ACPI_MADT_POLARITY_ACTIVE_LOW |
1718                         (acpi_sci_flags & ~ACPI_MADT_POLARITY_MASK);
1719         else
1720                 return -EINVAL;
1721         return 0;
1722 }
1723 early_param("acpi_sci", setup_acpi_sci);
1724
1725 int __acpi_acquire_global_lock(unsigned int *lock)
1726 {
1727         unsigned int old, new, val;
1728         do {
1729                 old = *lock;
1730                 new = (((old & ~0x3) + 2) + ((old >> 1) & 0x1));
1731                 val = cmpxchg(lock, old, new);
1732         } while (unlikely (val != old));
1733         return (new < 3) ? -1 : 0;
1734 }
1735
1736 int __acpi_release_global_lock(unsigned int *lock)
1737 {
1738         unsigned int old, new, val;
1739         do {
1740                 old = *lock;
1741                 new = old & ~0x3;
1742                 val = cmpxchg(lock, old, new);
1743         } while (unlikely (val != old));
1744         return old & 0x1;
1745 }