arch/i386/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/config.h>
  28 #include <linux/acpi.h>
  29 #include <linux/efi.h>
  30 #include <linux/irq.h>
  31 #include <linux/module.h>
  32 #include <linux/dmi.h>
  33
  34 #include <asm/pgtable.h>
  35 #include <asm/io_apic.h>
  36 #include <asm/apic.h>
  37 #include <asm/io.h>
  38 #include <asm/irq.h>
  39 #include <asm/mpspec.h>
  40
  41 #ifdef  CONFIG_X86_64
  42
  43 static inline void  acpi_madt_oem_check(char *oem_id, char *oem_table_id) { }
  44 extern void __init clustered_apic_check(void);
  45 static inline int ioapic_setup_disabled(void) { return 0; }
  46 #include <asm/proto.h>
  47
  48 #else   /* X86 */
  49
  50 #ifdef  CONFIG_X86_LOCAL_APIC
  51 #include <mach_apic.h>
  52 #include <mach_mpparse.h>
  53 #endif  /* CONFIG_X86_LOCAL_APIC */
  54
  55 #endif  /* X86 */
  56
  57 #define BAD_MADT_ENTRY(entry, end) (                                        \
  58                 (!entry) || (unsigned long)entry + sizeof(*entry) > end ||  \
  59                 ((acpi_table_entry_header *)entry)->length != sizeof(*entry))
  60
  61 #define PREFIX                  "ACPI: "
  62
  63 #ifdef CONFIG_ACPI_PCI
  64 int acpi_noirq __initdata;      /* skip ACPI IRQ initialization */
  65 int acpi_pci_disabled __initdata; /* skip ACPI PCI scan and IRQ initialization */
  66 #else
  67 int acpi_noirq __initdata = 1;
  68 int acpi_pci_disabled __initdata = 1;
  69 #endif
  70 int acpi_ht __initdata = 1;     /* enable HT */
  71
  72 int acpi_lapic;
  73 int acpi_ioapic;
  74 int acpi_strict;
  75 EXPORT_SYMBOL(acpi_strict);
  76
  77 acpi_interrupt_flags acpi_sci_flags __initdata;
  78 int acpi_sci_override_gsi __initdata;
  79 int acpi_skip_timer_override __initdata;
  80
  81 #ifdef CONFIG_X86_LOCAL_APIC
  82 static u64 acpi_lapic_addr __initdata = APIC_DEFAULT_PHYS_BASE;
  83 #endif
  84
  85 #ifndef __HAVE_ARCH_CMPXCHG
  86 #warning ACPI uses CMPXCHG, i486 and later hardware
  87 #endif
  88
  89 #define MAX_MADT_ENTRIES        256
  90 u8 x86_acpiid_to_apicid[MAX_MADT_ENTRIES] =
  91                         { [0 ... MAX_MADT_ENTRIES-1] = 0xff };
  92 EXPORT_SYMBOL(x86_acpiid_to_apicid);
  93
  94 /* --------------------------------------------------------------------------
  95                               Boot-time Configuration
  96    -------------------------------------------------------------------------- */
  97
  98 /*
  99  * The default interrupt routing model is PIC (8259).  This gets
 100  * overriden if IOAPICs are enumerated (below).
 101  */
 102 enum acpi_irq_model_id          acpi_irq_model = ACPI_IRQ_MODEL_PIC;
 103
 104 #ifdef  CONFIG_X86_64
 105
 106 /* rely on all ACPI tables being in the direct mapping */
 107 char *__acpi_map_table(unsigned long phys_addr, unsigned long size)
 108 {
 109         if (!phys_addr || !size)
 110         return NULL;
 111
 112         if (phys_addr < (end_pfn_map << PAGE_SHIFT))
 113                 return __va(phys_addr);
 114
 115         return NULL;
 116 }
 117
 118 #else
 119
 120 /*
 121  * Temporarily use the virtual area starting from FIX_IO_APIC_BASE_END,
 122  * to map the target physical address. The problem is that set_fixmap()
 123  * provides a single page, and it is possible that the page is not
 124  * sufficient.
 125  * By using this area, we can map up to MAX_IO_APICS pages temporarily,
 126  * i.e. until the next __va_range() call.
 127  *
 128  * Important Safety Note:  The fixed I/O APIC page numbers are *subtracted*
 129  * from the fixed base.  That's why we start at FIX_IO_APIC_BASE_END and
 130  * count idx down while incrementing the phys address.
 131  */
 132 char *__acpi_map_table(unsigned long phys, unsigned long size)
 133 {
 134         unsigned long base, offset, mapped_size;
 135         int idx;
 136
 137         if (phys + size < 8*1024*1024)
 138                 return __va(phys);
 139
 140         offset = phys & (PAGE_SIZE - 1);
 141         mapped_size = PAGE_SIZE - offset;
 142         set_fixmap(FIX_ACPI_END, phys);
 143         base = fix_to_virt(FIX_ACPI_END);
 144
 145         /*
 146          * Most cases can be covered by the below.
 147          */
 148         idx = FIX_ACPI_END;
 149         while (mapped_size < size) {
 150                 if (--idx < FIX_ACPI_BEGIN)
 151                         return NULL;    /* cannot handle this */
 152                 phys += PAGE_SIZE;
 153                 set_fixmap(idx, phys);
 154                 mapped_size += PAGE_SIZE;
 155         }
 156
 157         return ((unsigned char *) base + offset);
 158 }
 159 #endif
 160
 161 #ifdef CONFIG_PCI_MMCONFIG
 162 static int __init acpi_parse_mcfg(unsigned long phys_addr, unsigned long size)
 163 {
 164         struct acpi_table_mcfg *mcfg;
 165
 166         if (!phys_addr || !size)
 167                 return -EINVAL;
 168
 169         mcfg = (struct acpi_table_mcfg *) __acpi_map_table(phys_addr, size);
 170         if (!mcfg) {
 171                 printk(KERN_WARNING PREFIX "Unable to map MCFG\n");
 172                 return -ENODEV;
 173         }
 174
 175         if (mcfg->base_reserved) {
 176                 printk(KERN_ERR PREFIX "MMCONFIG not in low 4GB of memory\n");
 177                 return -ENODEV;
 178         }
 179
 180         pci_mmcfg_base_addr = mcfg->base_address;
 181
 182         return 0;
 183 }
 184 #else
 185 #define acpi_parse_mcfg NULL
 186 #endif /* !CONFIG_PCI_MMCONFIG */
 187
 188 #ifdef CONFIG_X86_LOCAL_APIC
 189 static int __init
 190 acpi_parse_madt (
 191         unsigned long           phys_addr,
 192         unsigned long           size)
 193 {
 194         struct acpi_table_madt  *madt = NULL;
 195
 196         if (!phys_addr || !size)
 197                 return -EINVAL;
 198
 199         madt = (struct acpi_table_madt *) __acpi_map_table(phys_addr, size);
 200         if (!madt) {
 201                 printk(KERN_WARNING PREFIX "Unable to map MADT\n");
 202                 return -ENODEV;
 203         }
 204
 205         if (madt->lapic_address) {
 206                 acpi_lapic_addr = (u64) madt->lapic_address;
 207
 208                 printk(KERN_DEBUG PREFIX "Local APIC address 0x%08x\n",
 209                         madt->lapic_address);
 210         }
 211
 212         acpi_madt_oem_check(madt->header.oem_id, madt->header.oem_table_id);
 213
 214         return 0;
 215 }
 216
 217
 218 static int __init
 219 acpi_parse_lapic (
 220         acpi_table_entry_header *header, const unsigned long end)
 221 {
 222         struct acpi_table_lapic *processor = NULL;
 223
 224         processor = (struct acpi_table_lapic*) header;
 225
 226         if (BAD_MADT_ENTRY(processor, end))
 227                 return -EINVAL;
 228
 229         acpi_table_print_madt_entry(header);
 230
 231         /* no utility in registering a disabled processor */
 232         if (processor->flags.enabled == 0)
 233                 return 0;
 234
 235         x86_acpiid_to_apicid[processor->acpi_id] = processor->id;
 236
 237         mp_register_lapic (
 238                 processor->id,                                     /* APIC ID */
 239                 processor->flags.enabled);                        /* Enabled? */
 240
 241         return 0;
 242 }
 243
 244 static int __init
 245 acpi_parse_lapic_addr_ovr (
 246         acpi_table_entry_header *header, const unsigned long end)
 247 {
 248         struct acpi_table_lapic_addr_ovr *lapic_addr_ovr = NULL;
 249
 250         lapic_addr_ovr = (struct acpi_table_lapic_addr_ovr*) header;
 251
 252         if (BAD_MADT_ENTRY(lapic_addr_ovr, end))
 253                 return -EINVAL;
 254
 255         acpi_lapic_addr = lapic_addr_ovr->address;
 256
 257         return 0;
 258 }
 259
 260 static int __init
 261 acpi_parse_lapic_nmi (
 262         acpi_table_entry_header *header, const unsigned long end)
 263 {
 264         struct acpi_table_lapic_nmi *lapic_nmi = NULL;
 265
 266         lapic_nmi = (struct acpi_table_lapic_nmi*) header;
 267
 268         if (BAD_MADT_ENTRY(lapic_nmi, end))
 269                 return -EINVAL;
 270
 271         acpi_table_print_madt_entry(header);
 272
 273         if (lapic_nmi->lint != 1)
 274                 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n");
 275
 276         return 0;
 277 }
 278
 279
 280 #endif /*CONFIG_X86_LOCAL_APIC*/
 281
 282 #if defined(CONFIG_X86_IO_APIC) && defined(CONFIG_ACPI_INTERPRETER)
 283
 284 static int __init
 285 acpi_parse_ioapic (
 286         acpi_table_entry_header *header, const unsigned long end)
 287 {
 288         struct acpi_table_ioapic *ioapic = NULL;
 289
 290         ioapic = (struct acpi_table_ioapic*) header;
 291
 292         if (BAD_MADT_ENTRY(ioapic, end))
 293                 return -EINVAL;
 294
 295         acpi_table_print_madt_entry(header);
 296
 297         mp_register_ioapic (
 298                 ioapic->id,
 299                 ioapic->address,
 300                 ioapic->global_irq_base);
 301
 302         return 0;
 303 }
 304
 305 /*
 306  * Parse Interrupt Source Override for the ACPI SCI
 307  */
 308 static void
 309 acpi_sci_ioapic_setup(u32 gsi, u16 polarity, u16 trigger)
 310 {
 311         if (trigger == 0)       /* compatible SCI trigger is level */
 312                 trigger = 3;
 313
 314         if (polarity == 0)      /* compatible SCI polarity is low */
 315                 polarity = 3;
 316
 317         /* Command-line over-ride via acpi_sci= */
 318         if (acpi_sci_flags.trigger)
 319                 trigger = acpi_sci_flags.trigger;
 320
 321         if (acpi_sci_flags.polarity)
 322                 polarity = acpi_sci_flags.polarity;
 323
 324         /*
 325          * mp_config_acpi_legacy_irqs() already setup IRQs < 16
 326          * If GSI is < 16, this will update its flags,
 327          * else it will create a new mp_irqs[] entry.
 328          */
 329         mp_override_legacy_irq(gsi, polarity, trigger, gsi);
 330
 331         /*
 332          * stash over-ride to indicate we've been here
 333          * and for later update of acpi_fadt
 334          */
 335         acpi_sci_override_gsi = gsi;
 336         return;
 337 }
 338
 339 static int __init
 340 acpi_parse_int_src_ovr (
 341         acpi_table_entry_header *header, const unsigned long end)
 342 {
 343         struct acpi_table_int_src_ovr *intsrc = NULL;
 344
 345         intsrc = (struct acpi_table_int_src_ovr*) header;
 346
 347         if (BAD_MADT_ENTRY(intsrc, end))
 348                 return -EINVAL;
 349
 350         acpi_table_print_madt_entry(header);
 351
 352         if (intsrc->bus_irq == acpi_fadt.sci_int) {
 353                 acpi_sci_ioapic_setup(intsrc->global_irq,
 354                         intsrc->flags.polarity, intsrc->flags.trigger);
 355                 return 0;
 356         }
 357
 358         if (acpi_skip_timer_override &&
 359                 intsrc->bus_irq == 0 && intsrc->global_irq == 2) {
 360                         printk(PREFIX "BIOS IRQ0 pin2 override ignored.\n");
 361                         return 0;
 362         }
 363
 364         mp_override_legacy_irq (
 365                 intsrc->bus_irq,
 366                 intsrc->flags.polarity,
 367                 intsrc->flags.trigger,
 368                 intsrc->global_irq);
 369
 370         return 0;
 371 }
 372
 373
 374 static int __init
 375 acpi_parse_nmi_src (
 376         acpi_table_entry_header *header, const unsigned long end)
 377 {
 378         struct acpi_table_nmi_src *nmi_src = NULL;
 379
 380         nmi_src = (struct acpi_table_nmi_src*) header;
 381
 382         if (BAD_MADT_ENTRY(nmi_src, end))
 383                 return -EINVAL;
 384
 385         acpi_table_print_madt_entry(header);
 386
 387         /* TBD: Support nimsrc entries? */
 388
 389         return 0;
 390 }
 391
 392 #endif /* CONFIG_X86_IO_APIC */
 393
 394 #ifdef  CONFIG_ACPI_BUS
 395
 396 /*
 397  * acpi_pic_sci_set_trigger()
 398  *
 399  * use ELCR to set PIC-mode trigger type for SCI
 400  *
 401  * If a PIC-mode SCI is not recognized or gives spurious IRQ7's
 402  * it may require Edge Trigger -- use "acpi_sci=edge"
 403  *
 404  * Port 0x4d0-4d1 are ECLR1 and ECLR2, the Edge/Level Control Registers
 405  * for the 8259 PIC.  bit[n] = 1 means irq[n] is Level, otherwise Edge.
 406  * ECLR1 is IRQ's 0-7 (IRQ 0, 1, 2 must be 0)
 407  * ECLR2 is IRQ's 8-15 (IRQ 8, 13 must be 0)
 408  */
 409
 410 void __init
 411 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 irq's, 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
 448 #endif /* CONFIG_ACPI_BUS */
 449
 450 int acpi_gsi_to_irq(u32 gsi, unsigned int *irq)
 451 {
 452 #ifdef CONFIG_X86_IO_APIC
 453         if (use_pci_vector() && !platform_legacy_irq(gsi))
 454                 *irq = IO_APIC_VECTOR(gsi);
 455         else
 456 #endif
 457                 *irq = gsi;
 458         return 0;
 459 }
 460
 461 unsigned int acpi_register_gsi(u32 gsi, int edge_level, int active_high_low)
 462 {
 463         unsigned int irq;
 464         unsigned int plat_gsi = gsi;
 465
 466 #ifdef CONFIG_PCI
 467         /*
 468          * Make sure all (legacy) PCI IRQs are set as level-triggered.
 469          */
 470         if (acpi_irq_model == ACPI_IRQ_MODEL_PIC) {
 471                 extern void eisa_set_level_irq(unsigned int irq);
 472
 473                 if (edge_level == 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(gsi, edge_level, active_high_low);
 481         }
 482 #endif
 483         acpi_gsi_to_irq(plat_gsi, &irq);
 484         return irq;
 485 }
 486 EXPORT_SYMBOL(acpi_register_gsi);
 487
 488 /*
 489  *  ACPI based hotplug support for CPU
 490  */
 491 #ifdef CONFIG_ACPI_HOTPLUG_CPU
 492 int
 493 acpi_map_lsapic(acpi_handle handle, int *pcpu)
 494 {
 495         /* TBD */
 496         return -EINVAL;
 497 }
 498 EXPORT_SYMBOL(acpi_map_lsapic);
 499
 500
 501 int
 502 acpi_unmap_lsapic(int cpu)
 503 {
 504         /* TBD */
 505         return -EINVAL;
 506 }
 507 EXPORT_SYMBOL(acpi_unmap_lsapic);
 508 #endif /* CONFIG_ACPI_HOTPLUG_CPU */
 509
 510 int
 511 acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base)
 512 {
 513         /* TBD */
 514         return -EINVAL;
 515 }
 516 EXPORT_SYMBOL(acpi_register_ioapic);
 517
 518 int
 519 acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base)
 520 {
 521         /* TBD */
 522         return -EINVAL;
 523 }
 524 EXPORT_SYMBOL(acpi_unregister_ioapic);
 525
 526 static unsigned long __init
 527 acpi_scan_rsdp (
 528         unsigned long           start,
 529         unsigned long           length)
 530 {
 531         unsigned long           offset = 0;
 532         unsigned long           sig_len = sizeof("RSD PTR ") - 1;
 533
 534         /*
 535          * Scan all 16-byte boundaries of the physical memory region for the
 536          * RSDP signature.
 537          */
 538         for (offset = 0; offset < length; offset += 16) {
 539                 if (strncmp((char *) (start + offset), "RSD PTR ", sig_len))
 540                         continue;
 541                 return (start + offset);
 542         }
 543
 544         return 0;
 545 }
 546
 547 static int __init acpi_parse_sbf(unsigned long phys_addr, unsigned long size)
 548 {
 549         struct acpi_table_sbf *sb;
 550
 551         if (!phys_addr || !size)
 552         return -EINVAL;
 553
 554         sb = (struct acpi_table_sbf *) __acpi_map_table(phys_addr, size);
 555         if (!sb) {
 556                 printk(KERN_WARNING PREFIX "Unable to map SBF\n");
 557                 return -ENODEV;
 558         }
 559
 560         sbf_port = sb->sbf_cmos; /* Save CMOS port */
 561
 562         return 0;
 563 }
 564
 565
 566 #ifdef CONFIG_HPET_TIMER
 567
 568 static int __init acpi_parse_hpet(unsigned long phys, unsigned long size)
 569 {
 570         struct acpi_table_hpet *hpet_tbl;
 571
 572         if (!phys || !size)
 573                 return -EINVAL;
 574
 575         hpet_tbl = (struct acpi_table_hpet *) __acpi_map_table(phys, size);
 576         if (!hpet_tbl) {
 577                 printk(KERN_WARNING PREFIX "Unable to map HPET\n");
 578                 return -ENODEV;
 579         }
 580
 581         if (hpet_tbl->addr.space_id != ACPI_SPACE_MEM) {
 582                 printk(KERN_WARNING PREFIX "HPET timers must be located in "
 583                        "memory.\n");
 584                 return -1;
 585         }
 586
 587 #ifdef  CONFIG_X86_64
 588         vxtime.hpet_address = hpet_tbl->addr.addrl |
 589                 ((long) hpet_tbl->addr.addrh << 32);
 590
 591         printk(KERN_INFO PREFIX "HPET id: %#x base: %#lx\n",
 592                hpet_tbl->id, vxtime.hpet_address);
 593 #else   /* X86 */
 594         {
 595                 extern unsigned long hpet_address;
 596
 597                 hpet_address = hpet_tbl->addr.addrl;
 598                 printk(KERN_INFO PREFIX "HPET id: %#x base: %#lx\n",
 599                         hpet_tbl->id, hpet_address);
 600         }
 601 #endif  /* X86 */
 602
 603         return 0;
 604 }
 605 #else
 606 #define acpi_parse_hpet NULL
 607 #endif
 608
 609 #ifdef CONFIG_X86_PM_TIMER
 610 extern u32 pmtmr_ioport;
 611 #endif
 612
 613 static int __init acpi_parse_fadt(unsigned long phys, unsigned long size)
 614 {
 615         struct fadt_descriptor_rev2 *fadt = NULL;
 616
 617         fadt = (struct fadt_descriptor_rev2*) __acpi_map_table(phys,size);
 618         if(!fadt) {
 619                 printk(KERN_WARNING PREFIX "Unable to map FADT\n");
 620                 return 0;
 621         }
 622
 623 #ifdef  CONFIG_ACPI_INTERPRETER
 624         /* initialize sci_int early for INT_SRC_OVR MADT parsing */
 625         acpi_fadt.sci_int = fadt->sci_int;
 626 #endif
 627
 628 #ifdef CONFIG_ACPI_BUS
 629         /* initialize rev and apic_phys_dest_mode for x86_64 genapic */
 630         acpi_fadt.revision = fadt->revision;
 631         acpi_fadt.force_apic_physical_destination_mode = fadt->force_apic_physical_destination_mode;
 632 #endif
 633
 634 #ifdef CONFIG_X86_PM_TIMER
 635         /* detect the location of the ACPI PM Timer */
 636         if (fadt->revision >= FADT2_REVISION_ID) {
 637                 /* FADT rev. 2 */
 638                 if (fadt->xpm_tmr_blk.address_space_id != ACPI_ADR_SPACE_SYSTEM_IO)
 639                         return 0;
 640
 641                 pmtmr_ioport = fadt->xpm_tmr_blk.address;
 642         } else {
 643                 /* FADT rev. 1 */
 644                 pmtmr_ioport = fadt->V1_pm_tmr_blk;
 645         }
 646         if (pmtmr_ioport)
 647                 printk(KERN_INFO PREFIX "PM-Timer IO Port: %#x\n", pmtmr_ioport);
 648 #endif
 649         return 0;
 650 }
 651
 652
 653 unsigned long __init
 654 acpi_find_rsdp (void)
 655 {
 656         unsigned long           rsdp_phys = 0;
 657
 658         if (efi_enabled) {
 659                 if (efi.acpi20)
 660                         return __pa(efi.acpi20);
 661                 else if (efi.acpi)
 662                         return __pa(efi.acpi);
 663         }
 664         /*
 665          * Scan memory looking for the RSDP signature. First search EBDA (low
 666          * memory) paragraphs and then search upper memory (E0000-FFFFF).
 667          */
 668         rsdp_phys = acpi_scan_rsdp (0, 0x400);
 669         if (!rsdp_phys)
 670                 rsdp_phys = acpi_scan_rsdp (0xE0000, 0x20000);
 671
 672         return rsdp_phys;
 673 }
 674
 675 #ifdef  CONFIG_X86_LOCAL_APIC
 676 /*
 677  * Parse LAPIC entries in MADT
 678  * returns 0 on success, < 0 on error
 679  */
 680 static int __init
 681 acpi_parse_madt_lapic_entries(void)
 682 {
 683         int count;
 684
 685         /*
 686          * Note that the LAPIC address is obtained from the MADT (32-bit value)
 687          * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value).
 688          */
 689
 690         count = acpi_table_parse_madt(ACPI_MADT_LAPIC_ADDR_OVR, acpi_parse_lapic_addr_ovr, 0);
 691         if (count < 0) {
 692                 printk(KERN_ERR PREFIX "Error parsing LAPIC address override entry\n");
 693                 return count;
 694         }
 695
 696         mp_register_lapic_address(acpi_lapic_addr);
 697
 698         count = acpi_table_parse_madt(ACPI_MADT_LAPIC, acpi_parse_lapic,
 699                                        MAX_APICS);
 700         if (!count) {
 701                 printk(KERN_ERR PREFIX "No LAPIC entries present\n");
 702                 /* TBD: Cleanup to allow fallback to MPS */
 703                 return -ENODEV;
 704         }
 705         else if (count < 0) {
 706                 printk(KERN_ERR PREFIX "Error parsing LAPIC entry\n");
 707                 /* TBD: Cleanup to allow fallback to MPS */
 708                 return count;
 709         }
 710
 711         count = acpi_table_parse_madt(ACPI_MADT_LAPIC_NMI, acpi_parse_lapic_nmi, 0);
 712         if (count < 0) {
 713                 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n");
 714                 /* TBD: Cleanup to allow fallback to MPS */
 715                 return count;
 716         }
 717         return 0;
 718 }
 719 #endif /* CONFIG_X86_LOCAL_APIC */
 720
 721 #if defined(CONFIG_X86_IO_APIC) && defined(CONFIG_ACPI_INTERPRETER)
 722 /*
 723  * Parse IOAPIC related entries in MADT
 724  * returns 0 on success, < 0 on error
 725  */
 726 static int __init
 727 acpi_parse_madt_ioapic_entries(void)
 728 {
 729         int count;
 730
 731         /*
 732          * ACPI interpreter is required to complete interrupt setup,
 733          * so if it is off, don't enumerate the io-apics with ACPI.
 734          * If MPS is present, it will handle them,
 735          * otherwise the system will stay in PIC mode
 736          */
 737         if (acpi_disabled || acpi_noirq) {
 738                 return -ENODEV;
 739         }
 740
 741         /*
 742          * if "noapic" boot option, don't look for IO-APICs
 743          */
 744         if (skip_ioapic_setup) {
 745                 printk(KERN_INFO PREFIX "Skipping IOAPIC probe "
 746                         "due to 'noapic' option.\n");
 747                 return -ENODEV;
 748         }
 749
 750         count = acpi_table_parse_madt(ACPI_MADT_IOAPIC, acpi_parse_ioapic, MAX_IO_APICS);
 751         if (!count) {
 752                 printk(KERN_ERR PREFIX "No IOAPIC entries present\n");
 753                 return -ENODEV;
 754         }
 755         else if (count < 0) {
 756                 printk(KERN_ERR PREFIX "Error parsing IOAPIC entry\n");
 757                 return count;
 758         }
 759
 760         count = acpi_table_parse_madt(ACPI_MADT_INT_SRC_OVR, acpi_parse_int_src_ovr, NR_IRQ_VECTORS);
 761         if (count < 0) {
 762                 printk(KERN_ERR PREFIX "Error parsing interrupt source overrides entry\n");
 763                 /* TBD: Cleanup to allow fallback to MPS */
 764                 return count;
 765         }
 766
 767         /*
 768          * If BIOS did not supply an INT_SRC_OVR for the SCI
 769          * pretend we got one so we can set the SCI flags.
 770          */
 771         if (!acpi_sci_override_gsi)
 772                 acpi_sci_ioapic_setup(acpi_fadt.sci_int, 0, 0);
 773
 774         /* Fill in identity legacy mapings where no override */
 775         mp_config_acpi_legacy_irqs();
 776
 777         count = acpi_table_parse_madt(ACPI_MADT_NMI_SRC, acpi_parse_nmi_src, NR_IRQ_VECTORS);
 778         if (count < 0) {
 779                 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n");
 780                 /* TBD: Cleanup to allow fallback to MPS */
 781                 return count;
 782         }
 783
 784         return 0;
 785 }
 786 #else
 787 static inline int acpi_parse_madt_ioapic_entries(void)
 788 {
 789         return -1;
 790 }
 791 #endif /* !(CONFIG_X86_IO_APIC && CONFIG_ACPI_INTERPRETER) */
 792
 793
 794 static void __init
 795 acpi_process_madt(void)
 796 {
 797 #ifdef CONFIG_X86_LOCAL_APIC
 798         int count, error;
 799
 800         count = acpi_table_parse(ACPI_APIC, acpi_parse_madt);
 801         if (count >= 1) {
 802
 803                 /*
 804                  * Parse MADT LAPIC entries
 805                  */
 806                 error = acpi_parse_madt_lapic_entries();
 807                 if (!error) {
 808                         acpi_lapic = 1;
 809
 810                         /*
 811                          * Parse MADT IO-APIC entries
 812                          */
 813                         error = acpi_parse_madt_ioapic_entries();
 814                         if (!error) {
 815                                 acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC;
 816                                 acpi_irq_balance_set(NULL);
 817                                 acpi_ioapic = 1;
 818
 819                                 smp_found_config = 1;
 820                                 clustered_apic_check();
 821                         }
 822                 }
 823                 if (error == -EINVAL) {
 824                         /*
 825                          * Dell Precision Workstation 410, 610 come here.
 826                          */
 827                         printk(KERN_ERR PREFIX "Invalid BIOS MADT, disabling ACPI\n");
 828                         disable_acpi();
 829                 }
 830         }
 831 #endif
 832         return;
 833 }
 834
 835 extern int acpi_force;
 836
 837 #ifdef __i386__
 838
 839 #ifdef  CONFIG_ACPI_PCI
 840 static int __init disable_acpi_irq(struct dmi_system_id *d)
 841 {
 842         if (!acpi_force) {
 843                 printk(KERN_NOTICE "%s detected: force use of acpi=noirq\n",
 844                        d->ident);
 845                 acpi_noirq_set();
 846         }
 847         return 0;
 848 }
 849
 850 static int __init disable_acpi_pci(struct dmi_system_id *d)
 851 {
 852         if (!acpi_force) {
 853                 printk(KERN_NOTICE "%s detected: force use of pci=noacpi\n",
 854                        d->ident);
 855                 acpi_disable_pci();
 856         }
 857         return 0;
 858 }
 859 #endif
 860
 861 static int __init dmi_disable_acpi(struct dmi_system_id *d)
 862 {
 863         if (!acpi_force) {
 864                 printk(KERN_NOTICE "%s detected: acpi off\n",d->ident);
 865                 disable_acpi();
 866         } else {
 867                 printk(KERN_NOTICE
 868                        "Warning: DMI blacklist says broken, but acpi forced\n");
 869         }
 870         return 0;
 871 }
 872
 873 /*
 874  * Limit ACPI to CPU enumeration for HT
 875  */
 876 static int __init force_acpi_ht(struct dmi_system_id *d)
 877 {
 878         if (!acpi_force) {
 879                 printk(KERN_NOTICE "%s detected: force use of acpi=ht\n", d->ident);
 880                 disable_acpi();
 881                 acpi_ht = 1;
 882         } else {
 883                 printk(KERN_NOTICE
 884                        "Warning: acpi=force overrules DMI blacklist: acpi=ht\n");
 885         }
 886         return 0;
 887 }
 888
 889 /*
 890  * If your system is blacklisted here, but you find that acpi=force
 891  * works for you, please contact acpi-devel@sourceforge.net
 892  */
 893 static struct dmi_system_id __initdata acpi_dmi_table[] = {
 894         /*
 895          * Boxes that need ACPI disabled
 896          */
 897         {
 898                 .callback = dmi_disable_acpi,
 899                 .ident = "IBM Thinkpad",
 900                 .matches = {
 901                         DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
 902                         DMI_MATCH(DMI_BOARD_NAME, "2629H1G"),
 903                 },
 904         },
 905
 906         /*
 907          * Boxes that need acpi=ht
 908          */
 909         {
 910                 .callback = force_acpi_ht,
 911                 .ident = "FSC Primergy T850",
 912                 .matches = {
 913                         DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
 914                         DMI_MATCH(DMI_PRODUCT_NAME, "PRIMERGY T850"),
 915                 },
 916         },
 917         {
 918                 .callback = force_acpi_ht,
 919                 .ident = "DELL GX240",
 920                 .matches = {
 921                         DMI_MATCH(DMI_BOARD_VENDOR, "Dell Computer Corporation"),
 922                         DMI_MATCH(DMI_BOARD_NAME, "OptiPlex GX240"),
 923                 },
 924         },
 925         {
 926                 .callback = force_acpi_ht,
 927                 .ident = "HP VISUALIZE NT Workstation",
 928                 .matches = {
 929                         DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"),
 930                         DMI_MATCH(DMI_PRODUCT_NAME, "HP VISUALIZE NT Workstation"),
 931                 },
 932         },
 933         {
 934                 .callback = force_acpi_ht,
 935                 .ident = "Compaq Workstation W8000",
 936                 .matches = {
 937                         DMI_MATCH(DMI_SYS_VENDOR, "Compaq"),
 938                         DMI_MATCH(DMI_PRODUCT_NAME, "Workstation W8000"),
 939                 },
 940         },
 941         {
 942                 .callback = force_acpi_ht,
 943                 .ident = "ASUS P4B266",
 944                 .matches = {
 945                         DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
 946                         DMI_MATCH(DMI_BOARD_NAME, "P4B266"),
 947                 },
 948         },
 949         {
 950                 .callback = force_acpi_ht,
 951                 .ident = "ASUS P2B-DS",
 952                 .matches = {
 953                         DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
 954                         DMI_MATCH(DMI_BOARD_NAME, "P2B-DS"),
 955                 },
 956         },
 957         {
 958                 .callback = force_acpi_ht,
 959                 .ident = "ASUS CUR-DLS",
 960                 .matches = {
 961                         DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
 962                         DMI_MATCH(DMI_BOARD_NAME, "CUR-DLS"),
 963                 },
 964         },
 965         {
 966                 .callback = force_acpi_ht,
 967                 .ident = "ABIT i440BX-W83977",
 968                 .matches = {
 969                         DMI_MATCH(DMI_BOARD_VENDOR, "ABIT <http://www.abit.com>"),
 970                         DMI_MATCH(DMI_BOARD_NAME, "i440BX-W83977 (BP6)"),
 971                 },
 972         },
 973         {
 974                 .callback = force_acpi_ht,
 975                 .ident = "IBM Bladecenter",
 976                 .matches = {
 977                         DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
 978                         DMI_MATCH(DMI_BOARD_NAME, "IBM eServer BladeCenter HS20"),
 979                 },
 980         },
 981         {
 982                 .callback = force_acpi_ht,
 983                 .ident = "IBM eServer xSeries 360",
 984                 .matches = {
 985                         DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
 986                         DMI_MATCH(DMI_BOARD_NAME, "eServer xSeries 360"),
 987                 },
 988         },
 989         {
 990                 .callback = force_acpi_ht,
 991                 .ident = "IBM eserver xSeries 330",
 992                 .matches = {
 993                         DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
 994                         DMI_MATCH(DMI_BOARD_NAME, "eserver xSeries 330"),
 995                 },
 996         },
 997         {
 998                 .callback = force_acpi_ht,
 999                 .ident = "IBM eserver xSeries 440",
1000                 .matches = {
1001                         DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1002                         DMI_MATCH(DMI_PRODUCT_NAME, "eserver xSeries 440"),
1003                 },
1004         },
1005
1006 #ifdef  CONFIG_ACPI_PCI
1007         /*
1008          * Boxes that need ACPI PCI IRQ routing disabled
1009          */
1010         {
1011                 .callback = disable_acpi_irq,
1012                 .ident = "ASUS A7V",
1013                 .matches = {
1014                         DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC"),
1015                         DMI_MATCH(DMI_BOARD_NAME, "<A7V>"),
1016                         /* newer BIOS, Revision 1011, does work */
1017                         DMI_MATCH(DMI_BIOS_VERSION, "ASUS A7V ACPI BIOS Revision 1007"),
1018                 },
1019         },
1020
1021         /*
1022          * Boxes that need ACPI PCI IRQ routing and PCI scan disabled
1023          */
1024         {       /* _BBN 0 bug */
1025                 .callback = disable_acpi_pci,
1026                 .ident = "ASUS PR-DLS",
1027                 .matches = {
1028                         DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1029                         DMI_MATCH(DMI_BOARD_NAME, "PR-DLS"),
1030                         DMI_MATCH(DMI_BIOS_VERSION, "ASUS PR-DLS ACPI BIOS Revision 1010"),
1031                         DMI_MATCH(DMI_BIOS_DATE, "03/21/2003")
1032                 },
1033         },
1034         {
1035                 .callback = disable_acpi_pci,
1036                 .ident = "Acer TravelMate 36x Laptop",
1037                 .matches = {
1038                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
1039                         DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"),
1040                 },
1041         },
1042 #endif
1043         { }
1044 };
1045
1046 #endif  /* __i386__ */
1047
1048 /*
1049  * acpi_boot_table_init() and acpi_boot_init()
1050  *  called from setup_arch(), always.
1051  *      1. checksums all tables
1052  *      2. enumerates lapics
1053  *      3. enumerates io-apics
1054  *
1055  * acpi_table_init() is separate to allow reading SRAT without
1056  * other side effects.
1057  *
1058  * side effects of acpi_boot_init:
1059  *      acpi_lapic = 1 if LAPIC found
1060  *      acpi_ioapic = 1 if IOAPIC found
1061  *      if (acpi_lapic && acpi_ioapic) smp_found_config = 1;
1062  *      if acpi_blacklisted() acpi_disabled = 1;
1063  *      acpi_irq_model=...
1064  *      ...
1065  *
1066  * return value: (currently ignored)
1067  *      0: success
1068  *      !0: failure
1069  */
1070
1071 int __init
1072 acpi_boot_table_init(void)
1073 {
1074         int error;
1075
1076 #ifdef __i386__
1077         dmi_check_system(acpi_dmi_table);
1078 #endif
1079
1080         /*
1081          * If acpi_disabled, bail out
1082          * One exception: acpi=ht continues far enough to enumerate LAPICs
1083          */
1084         if (acpi_disabled && !acpi_ht)
1085                  return 1;
1086
1087         /*
1088          * Initialize the ACPI boot-time table parser.
1089          */
1090         error = acpi_table_init();
1091         if (error) {
1092                 disable_acpi();
1093                 return error;
1094         }
1095
1096 #ifdef __i386__
1097         check_acpi_pci();
1098 #endif
1099
1100         acpi_table_parse(ACPI_BOOT, acpi_parse_sbf);
1101
1102         /*
1103          * blacklist may disable ACPI entirely
1104          */
1105         error = acpi_blacklisted();
1106         if (error) {
1107                 if (acpi_force) {
1108                         printk(KERN_WARNING PREFIX "acpi=force override\n");
1109                 } else {
1110                         printk(KERN_WARNING PREFIX "Disabling ACPI support\n");
1111                         disable_acpi();
1112                         return error;
1113                 }
1114         }
1115
1116         return 0;
1117 }
1118
1119
1120 int __init acpi_boot_init(void)
1121 {
1122         /*
1123          * If acpi_disabled, bail out
1124          * One exception: acpi=ht continues far enough to enumerate LAPICs
1125          */
1126         if (acpi_disabled && !acpi_ht)
1127                  return 1;
1128
1129         acpi_table_parse(ACPI_BOOT, acpi_parse_sbf);
1130
1131         /*
1132          * set sci_int and PM timer address
1133          */
1134         acpi_table_parse(ACPI_FADT, acpi_parse_fadt);
1135
1136         /*
1137          * Process the Multiple APIC Description Table (MADT), if present
1138          */
1139         acpi_process_madt();
1140
1141         acpi_table_parse(ACPI_HPET, acpi_parse_hpet);
1142         acpi_table_parse(ACPI_MCFG, acpi_parse_mcfg);
1143
1144         return 0;
1145 }
1146