git.oblomov.eu Git - linux-2.6/blob - 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 {
  45 }
  46 extern void __init clustered_apic_check(void);
  47 static inline int ioapic_setup_disabled(void)
  48 {
  49         return 0;
  50 }
  51
  52 #include <asm/proto.h>
  53
  54 #else                           /* X86 */
  55
  56 #ifdef  CONFIG_X86_LOCAL_APIC
  57 #include <mach_apic.h>
  58 #include <mach_mpparse.h>
  59 #endif                          /* CONFIG_X86_LOCAL_APIC */
  60
  61 #endif                          /* X86 */
  62
  63 #define BAD_MADT_ENTRY(entry, end) (                                        \
  64                 (!entry) || (unsigned long)entry + sizeof(*entry) > end ||  \
  65                 ((acpi_table_entry_header *)entry)->length != sizeof(*entry))
  66
  67 #define PREFIX                  "ACPI: "
  68
  69 #ifdef CONFIG_ACPI_PCI
  70 int acpi_noirq __initdata;      /* skip ACPI IRQ initialization */
  71 int acpi_pci_disabled __initdata;       /* skip ACPI PCI scan and IRQ initialization */
  72 #else
  73 int acpi_noirq __initdata = 1;
  74 int acpi_pci_disabled __initdata = 1;
  75 #endif
  76 int acpi_ht __initdata = 1;     /* enable HT */
  77
  78 int acpi_lapic;
  79 int acpi_ioapic;
  80 int acpi_strict;
  81 EXPORT_SYMBOL(acpi_strict);
  82
  83 acpi_interrupt_flags acpi_sci_flags __initdata;
  84 int acpi_sci_override_gsi __initdata;
  85 int acpi_skip_timer_override __initdata;
  86
  87 #ifdef CONFIG_X86_LOCAL_APIC
  88 static u64 acpi_lapic_addr __initdata = APIC_DEFAULT_PHYS_BASE;
  89 #endif
  90
  91 #ifndef __HAVE_ARCH_CMPXCHG
  92 #warning ACPI uses CMPXCHG, i486 and later hardware
  93 #endif
  94
  95 #define MAX_MADT_ENTRIES        256
  96 u8 x86_acpiid_to_apicid[MAX_MADT_ENTRIES] =
  97     {[0 ... MAX_MADT_ENTRIES - 1] = 0xff };
  98 EXPORT_SYMBOL(x86_acpiid_to_apicid);
  99
 100 /* --------------------------------------------------------------------------
 101                               Boot-time Configuration
 102    -------------------------------------------------------------------------- */
 103
 104 /*
 105  * The default interrupt routing model is PIC (8259).  This gets
 106  * overriden if IOAPICs are enumerated (below).
 107  */
 108 enum acpi_irq_model_id acpi_irq_model = ACPI_IRQ_MODEL_PIC;
 109
 110 #ifdef  CONFIG_X86_64
 111
 112 /* rely on all ACPI tables being in the direct mapping */
 113 char *__acpi_map_table(unsigned long phys_addr, unsigned long size)
 114 {
 115         if (!phys_addr || !size)
 116                 return NULL;
 117
 118         if (phys_addr < (end_pfn_map << PAGE_SHIFT))
 119                 return __va(phys_addr);
 120
 121         return NULL;
 122 }
 123
 124 #else
 125
 126 /*
 127  * Temporarily use the virtual area starting from FIX_IO_APIC_BASE_END,
 128  * to map the target physical address. The problem is that set_fixmap()
 129  * provides a single page, and it is possible that the page is not
 130  * sufficient.
 131  * By using this area, we can map up to MAX_IO_APICS pages temporarily,
 132  * i.e. until the next __va_range() call.
 133  *
 134  * Important Safety Note:  The fixed I/O APIC page numbers are *subtracted*
 135  * from the fixed base.  That's why we start at FIX_IO_APIC_BASE_END and
 136  * count idx down while incrementing the phys address.
 137  */
 138 char *__acpi_map_table(unsigned long phys, unsigned long size)
 139 {
 140         unsigned long base, offset, mapped_size;
 141         int idx;
 142
 143         if (phys + size < 8 * 1024 * 1024)
 144                 return __va(phys);
 145
 146         offset = phys & (PAGE_SIZE - 1);
 147         mapped_size = PAGE_SIZE - offset;
 148         set_fixmap(FIX_ACPI_END, phys);
 149         base = fix_to_virt(FIX_ACPI_END);
 150
 151         /*
 152          * Most cases can be covered by the below.
 153          */
 154         idx = FIX_ACPI_END;
 155         while (mapped_size < size) {
 156                 if (--idx < FIX_ACPI_BEGIN)
 157                         return NULL;    /* cannot handle this */
 158                 phys += PAGE_SIZE;
 159                 set_fixmap(idx, phys);
 160                 mapped_size += PAGE_SIZE;
 161         }
 162
 163         return ((unsigned char *)base + offset);
 164 }
 165 #endif
 166
 167 #ifdef CONFIG_PCI_MMCONFIG
 168 /* The physical address of the MMCONFIG aperture.  Set from ACPI tables. */
 169 struct acpi_table_mcfg_config *pci_mmcfg_config;
 170 int pci_mmcfg_config_num;
 171
 172 int __init acpi_parse_mcfg(unsigned long phys_addr, unsigned long size)
 173 {
 174         struct acpi_table_mcfg *mcfg;
 175         unsigned long i;
 176         int config_size;
 177
 178         if (!phys_addr || !size)
 179                 return -EINVAL;
 180
 181         mcfg = (struct acpi_table_mcfg *)__acpi_map_table(phys_addr, size);
 182         if (!mcfg) {
 183                 printk(KERN_WARNING PREFIX "Unable to map MCFG\n");
 184                 return -ENODEV;
 185         }
 186
 187         /* how many config structures do we have */
 188         pci_mmcfg_config_num = 0;
 189         i = size - sizeof(struct acpi_table_mcfg);
 190         while (i >= sizeof(struct acpi_table_mcfg_config)) {
 191                 ++pci_mmcfg_config_num;
 192                 i -= sizeof(struct acpi_table_mcfg_config);
 193         };
 194         if (pci_mmcfg_config_num == 0) {
 195                 printk(KERN_ERR PREFIX "MMCONFIG has no entries\n");
 196                 return -ENODEV;
 197         }
 198
 199         config_size = pci_mmcfg_config_num * sizeof(*pci_mmcfg_config);
 200         pci_mmcfg_config = kmalloc(config_size, GFP_KERNEL);
 201         if (!pci_mmcfg_config) {
 202                 printk(KERN_WARNING PREFIX
 203                        "No memory for MCFG config tables\n");
 204                 return -ENOMEM;
 205         }
 206
 207         memcpy(pci_mmcfg_config, &mcfg->config, config_size);
 208         for (i = 0; i < pci_mmcfg_config_num; ++i) {
 209                 if (mcfg->config[i].base_reserved) {
 210                         printk(KERN_ERR PREFIX
 211                                "MMCONFIG not in low 4GB of memory\n");
 212                         return -ENODEV;
 213                 }
 214         }
 215
 216         return 0;
 217 }
 218 #endif                          /* CONFIG_PCI_MMCONFIG */
 219
 220 #ifdef CONFIG_X86_LOCAL_APIC
 221 static int __init acpi_parse_madt(unsigned long phys_addr, unsigned long size)
 222 {
 223         struct acpi_table_madt *madt = NULL;
 224
 225         if (!phys_addr || !size)
 226                 return -EINVAL;
 227
 228         madt = (struct acpi_table_madt *)__acpi_map_table(phys_addr, size);
 229         if (!madt) {
 230                 printk(KERN_WARNING PREFIX "Unable to map MADT\n");
 231                 return -ENODEV;
 232         }
 233
 234         if (madt->lapic_address) {
 235                 acpi_lapic_addr = (u64) madt->lapic_address;
 236
 237                 printk(KERN_DEBUG PREFIX "Local APIC address 0x%08x\n",
 238                        madt->lapic_address);
 239         }
 240
 241         acpi_madt_oem_check(madt->header.oem_id, madt->header.oem_table_id);
 242
 243         return 0;
 244 }
 245
 246 static int __init
 247 acpi_parse_lapic(acpi_table_entry_header * header, const unsigned long end)
 248 {
 249         struct acpi_table_lapic *processor = NULL;
 250
 251         processor = (struct acpi_table_lapic *)header;
 252
 253         if (BAD_MADT_ENTRY(processor, end))
 254                 return -EINVAL;
 255
 256         acpi_table_print_madt_entry(header);
 257
 258         /* no utility in registering a disabled processor */
 259         if (processor->flags.enabled == 0)
 260                 return 0;
 261
 262         x86_acpiid_to_apicid[processor->acpi_id] = processor->id;
 263
 264         mp_register_lapic(processor->id,        /* APIC ID */
 265                           processor->flags.enabled);    /* Enabled? */
 266
 267         return 0;
 268 }
 269
 270 static int __init
 271 acpi_parse_lapic_addr_ovr(acpi_table_entry_header * header,
 272                           const unsigned long end)
 273 {
 274         struct acpi_table_lapic_addr_ovr *lapic_addr_ovr = NULL;
 275
 276         lapic_addr_ovr = (struct acpi_table_lapic_addr_ovr *)header;
 277
 278         if (BAD_MADT_ENTRY(lapic_addr_ovr, end))
 279                 return -EINVAL;
 280
 281         acpi_lapic_addr = lapic_addr_ovr->address;
 282
 283         return 0;
 284 }
 285
 286 static int __init
 287 acpi_parse_lapic_nmi(acpi_table_entry_header * header, const unsigned long end)
 288 {
 289         struct acpi_table_lapic_nmi *lapic_nmi = NULL;
 290
 291         lapic_nmi = (struct acpi_table_lapic_nmi *)header;
 292
 293         if (BAD_MADT_ENTRY(lapic_nmi, end))
 294                 return -EINVAL;
 295
 296         acpi_table_print_madt_entry(header);
 297
 298         if (lapic_nmi->lint != 1)
 299                 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n");
 300
 301         return 0;
 302 }
 303
 304 #endif                          /*CONFIG_X86_LOCAL_APIC */
 305
 306 #if defined(CONFIG_X86_IO_APIC) && defined(CONFIG_ACPI_INTERPRETER)
 307
 308 static int __init
 309 acpi_parse_ioapic(acpi_table_entry_header * header, const unsigned long end)
 310 {
 311         struct acpi_table_ioapic *ioapic = NULL;
 312
 313         ioapic = (struct acpi_table_ioapic *)header;
 314
 315         if (BAD_MADT_ENTRY(ioapic, end))
 316                 return -EINVAL;
 317
 318         acpi_table_print_madt_entry(header);
 319
 320         mp_register_ioapic(ioapic->id,
 321                            ioapic->address, ioapic->global_irq_base);
 322
 323         return 0;
 324 }
 325
 326 /*
 327  * Parse Interrupt Source Override for the ACPI SCI
 328  */
 329 static void acpi_sci_ioapic_setup(u32 gsi, u16 polarity, u16 trigger)
 330 {
 331         if (trigger == 0)       /* compatible SCI trigger is level */
 332                 trigger = 3;
 333
 334         if (polarity == 0)      /* compatible SCI polarity is low */
 335                 polarity = 3;
 336
 337         /* Command-line over-ride via acpi_sci= */
 338         if (acpi_sci_flags.trigger)
 339                 trigger = acpi_sci_flags.trigger;
 340
 341         if (acpi_sci_flags.polarity)
 342                 polarity = acpi_sci_flags.polarity;
 343
 344         /*
 345          * mp_config_acpi_legacy_irqs() already setup IRQs < 16
 346          * If GSI is < 16, this will update its flags,
 347          * else it will create a new mp_irqs[] entry.
 348          */
 349         mp_override_legacy_irq(gsi, polarity, trigger, gsi);
 350
 351         /*
 352          * stash over-ride to indicate we've been here
 353          * and for later update of acpi_fadt
 354          */
 355         acpi_sci_override_gsi = gsi;
 356         return;
 357 }
 358
 359 static int __init
 360 acpi_parse_int_src_ovr(acpi_table_entry_header * header,
 361                        const unsigned long end)
 362 {
 363         struct acpi_table_int_src_ovr *intsrc = NULL;
 364
 365         intsrc = (struct acpi_table_int_src_ovr *)header;
 366
 367         if (BAD_MADT_ENTRY(intsrc, end))
 368                 return -EINVAL;
 369
 370         acpi_table_print_madt_entry(header);
 371
 372         if (intsrc->bus_irq == acpi_fadt.sci_int) {
 373                 acpi_sci_ioapic_setup(intsrc->global_irq,
 374                                       intsrc->flags.polarity,
 375                                       intsrc->flags.trigger);
 376                 return 0;
 377         }
 378
 379         if (acpi_skip_timer_override &&
 380             intsrc->bus_irq == 0 && intsrc->global_irq == 2) {
 381                 printk(PREFIX "BIOS IRQ0 pin2 override ignored.\n");
 382                 return 0;
 383         }
 384
 385         mp_override_legacy_irq(intsrc->bus_irq,
 386                                intsrc->flags.polarity,
 387                                intsrc->flags.trigger, intsrc->global_irq);
 388
 389         return 0;
 390 }
 391
 392 static int __init
 393 acpi_parse_nmi_src(acpi_table_entry_header * header, const unsigned long end)
 394 {
 395         struct acpi_table_nmi_src *nmi_src = NULL;
 396
 397         nmi_src = (struct acpi_table_nmi_src *)header;
 398
 399         if (BAD_MADT_ENTRY(nmi_src, end))
 400                 return -EINVAL;
 401
 402         acpi_table_print_madt_entry(header);
 403
 404         /* TBD: Support nimsrc entries? */
 405
 406         return 0;
 407 }
 408
 409 #endif                          /* CONFIG_X86_IO_APIC */
 410
 411 #ifdef  CONFIG_ACPI_BUS
 412
 413 /*
 414  * acpi_pic_sci_set_trigger()
 415  *
 416  * use ELCR to set PIC-mode trigger type for SCI
 417  *
 418  * If a PIC-mode SCI is not recognized or gives spurious IRQ7's
 419  * it may require Edge Trigger -- use "acpi_sci=edge"
 420  *
 421  * Port 0x4d0-4d1 are ECLR1 and ECLR2, the Edge/Level Control Registers
 422  * for the 8259 PIC.  bit[n] = 1 means irq[n] is Level, otherwise Edge.
 423  * ECLR1 is IRQ's 0-7 (IRQ 0, 1, 2 must be 0)
 424  * ECLR2 is IRQ's 8-15 (IRQ 8, 13 must be 0)
 425  */
 426
 427 void __init acpi_pic_sci_set_trigger(unsigned int irq, u16 trigger)
 428 {
 429         unsigned int mask = 1 << irq;
 430         unsigned int old, new;
 431
 432         /* Real old ELCR mask */
 433         old = inb(0x4d0) | (inb(0x4d1) << 8);
 434
 435         /*
 436          * If we use ACPI to set PCI irq's, then we should clear ELCR
 437          * since we will set it correctly as we enable the PCI irq
 438          * routing.
 439          */
 440         new = acpi_noirq ? old : 0;
 441
 442         /*
 443          * Update SCI information in the ELCR, it isn't in the PCI
 444          * routing tables..
 445          */
 446         switch (trigger) {
 447         case 1:         /* Edge - clear */
 448                 new &= ~mask;
 449                 break;
 450         case 3:         /* Level - set */
 451                 new |= mask;
 452                 break;
 453         }
 454
 455         if (old == new)
 456                 return;
 457
 458         printk(PREFIX "setting ELCR to %04x (from %04x)\n", new, old);
 459         outb(new, 0x4d0);
 460         outb(new >> 8, 0x4d1);
 461 }
 462
 463 #endif                          /* CONFIG_ACPI_BUS */
 464
 465 int acpi_gsi_to_irq(u32 gsi, unsigned int *irq)
 466 {
 467 #ifdef CONFIG_X86_IO_APIC
 468         if (use_pci_vector() && !platform_legacy_irq(gsi))
 469                 *irq = IO_APIC_VECTOR(gsi);
 470         else
 471 #endif
 472                 *irq = gsi;
 473         return 0;
 474 }
 475
 476 /*
 477  * success: return IRQ number (>=0)
 478  * failure: return < 0
 479  */
 480 int acpi_register_gsi(u32 gsi, int edge_level, int active_high_low)
 481 {
 482         unsigned int irq;
 483         unsigned int plat_gsi = gsi;
 484
 485 #ifdef CONFIG_PCI
 486         /*
 487          * Make sure all (legacy) PCI IRQs are set as level-triggered.
 488          */
 489         if (acpi_irq_model == ACPI_IRQ_MODEL_PIC) {
 490                 extern void eisa_set_level_irq(unsigned int irq);
 491
 492                 if (edge_level == ACPI_LEVEL_SENSITIVE)
 493                         eisa_set_level_irq(gsi);
 494         }
 495 #endif
 496
 497 #ifdef CONFIG_X86_IO_APIC
 498         if (acpi_irq_model == ACPI_IRQ_MODEL_IOAPIC) {
 499                 plat_gsi = mp_register_gsi(gsi, edge_level, active_high_low);
 500         }
 501 #endif
 502         acpi_gsi_to_irq(plat_gsi, &irq);
 503         return irq;
 504 }
 505
 506 EXPORT_SYMBOL(acpi_register_gsi);
 507
 508 /*
 509  *  ACPI based hotplug support for CPU
 510  */
 511 #ifdef CONFIG_ACPI_HOTPLUG_CPU
 512 int acpi_map_lsapic(acpi_handle handle, int *pcpu)
 513 {
 514         /* TBD */
 515         return -EINVAL;
 516 }
 517
 518 EXPORT_SYMBOL(acpi_map_lsapic);
 519
 520 int acpi_unmap_lsapic(int cpu)
 521 {
 522         /* TBD */
 523         return -EINVAL;
 524 }
 525
 526 EXPORT_SYMBOL(acpi_unmap_lsapic);
 527 #endif                          /* CONFIG_ACPI_HOTPLUG_CPU */
 528
 529 int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base)
 530 {
 531         /* TBD */
 532         return -EINVAL;
 533 }
 534
 535 EXPORT_SYMBOL(acpi_register_ioapic);
 536
 537 int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base)
 538 {
 539         /* TBD */
 540         return -EINVAL;
 541 }
 542
 543 EXPORT_SYMBOL(acpi_unregister_ioapic);
 544
 545 static unsigned long __init
 546 acpi_scan_rsdp(unsigned long start, unsigned long length)
 547 {
 548         unsigned long offset = 0;
 549         unsigned long sig_len = sizeof("RSD PTR ") - 1;
 550
 551         /*
 552          * Scan all 16-byte boundaries of the physical memory region for the
 553          * RSDP signature.
 554          */
 555         for (offset = 0; offset < length; offset += 16) {
 556                 if (strncmp((char *)(start + offset), "RSD PTR ", sig_len))
 557                         continue;
 558                 return (start + offset);
 559         }
 560
 561         return 0;
 562 }
 563
 564 static int __init acpi_parse_sbf(unsigned long phys_addr, unsigned long size)
 565 {
 566         struct acpi_table_sbf *sb;
 567
 568         if (!phys_addr || !size)
 569                 return -EINVAL;
 570
 571         sb = (struct acpi_table_sbf *)__acpi_map_table(phys_addr, size);
 572         if (!sb) {
 573                 printk(KERN_WARNING PREFIX "Unable to map SBF\n");
 574                 return -ENODEV;
 575         }
 576
 577         sbf_port = sb->sbf_cmos;        /* Save CMOS port */
 578
 579         return 0;
 580 }
 581
 582 #ifdef CONFIG_HPET_TIMER
 583
 584 static int __init acpi_parse_hpet(unsigned long phys, unsigned long size)
 585 {
 586         struct acpi_table_hpet *hpet_tbl;
 587
 588         if (!phys || !size)
 589                 return -EINVAL;
 590
 591         hpet_tbl = (struct acpi_table_hpet *)__acpi_map_table(phys, size);
 592         if (!hpet_tbl) {
 593                 printk(KERN_WARNING PREFIX "Unable to map HPET\n");
 594                 return -ENODEV;
 595         }
 596
 597         if (hpet_tbl->addr.space_id != ACPI_SPACE_MEM) {
 598                 printk(KERN_WARNING PREFIX "HPET timers must be located in "
 599                        "memory.\n");
 600                 return -1;
 601         }
 602 #ifdef  CONFIG_X86_64
 603         vxtime.hpet_address = hpet_tbl->addr.addrl |
 604             ((long)hpet_tbl->addr.addrh << 32);
 605
 606         printk(KERN_INFO PREFIX "HPET id: %#x base: %#lx\n",
 607                hpet_tbl->id, vxtime.hpet_address);
 608 #else                           /* X86 */
 609         {
 610                 extern unsigned long hpet_address;
 611
 612                 hpet_address = hpet_tbl->addr.addrl;
 613                 printk(KERN_INFO PREFIX "HPET id: %#x base: %#lx\n",
 614                        hpet_tbl->id, hpet_address);
 615         }
 616 #endif                          /* X86 */
 617
 618         return 0;
 619 }
 620 #else
 621 #define acpi_parse_hpet NULL
 622 #endif
 623
 624 #ifdef CONFIG_X86_PM_TIMER
 625 extern u32 pmtmr_ioport;
 626 #endif
 627
 628 static int __init acpi_parse_fadt(unsigned long phys, unsigned long size)
 629 {
 630         struct fadt_descriptor_rev2 *fadt = NULL;
 631
 632         fadt = (struct fadt_descriptor_rev2 *)__acpi_map_table(phys, size);
 633         if (!fadt) {
 634                 printk(KERN_WARNING PREFIX "Unable to map FADT\n");
 635                 return 0;
 636         }
 637 #ifdef  CONFIG_ACPI_INTERPRETER
 638         /* initialize sci_int early for INT_SRC_OVR MADT parsing */
 639         acpi_fadt.sci_int = fadt->sci_int;
 640 #endif
 641
 642 #ifdef CONFIG_ACPI_BUS
 643         /* initialize rev and apic_phys_dest_mode for x86_64 genapic */
 644         acpi_fadt.revision = fadt->revision;
 645         acpi_fadt.force_apic_physical_destination_mode =
 646             fadt->force_apic_physical_destination_mode;
 647 #endif
 648
 649 #ifdef CONFIG_X86_PM_TIMER
 650         /* detect the location of the ACPI PM Timer */
 651         if (fadt->revision >= FADT2_REVISION_ID) {
 652                 /* FADT rev. 2 */
 653                 if (fadt->xpm_tmr_blk.address_space_id !=
 654                     ACPI_ADR_SPACE_SYSTEM_IO)
 655                         return 0;
 656
 657                 pmtmr_ioport = fadt->xpm_tmr_blk.address;
 658         } else {
 659                 /* FADT rev. 1 */
 660                 pmtmr_ioport = fadt->V1_pm_tmr_blk;
 661         }
 662         if (pmtmr_ioport)
 663                 printk(KERN_INFO PREFIX "PM-Timer IO Port: %#x\n",
 664                        pmtmr_ioport);
 665 #endif
 666         return 0;
 667 }
 668
 669 unsigned long __init acpi_find_rsdp(void)
 670 {
 671         unsigned long rsdp_phys = 0;
 672
 673         if (efi_enabled) {
 674                 if (efi.acpi20)
 675                         return __pa(efi.acpi20);
 676                 else if (efi.acpi)
 677                         return __pa(efi.acpi);
 678         }
 679         /*
 680          * Scan memory looking for the RSDP signature. First search EBDA (low
 681          * memory) paragraphs and then search upper memory (E0000-FFFFF).
 682          */
 683         rsdp_phys = acpi_scan_rsdp(0, 0x400);
 684         if (!rsdp_phys)
 685                 rsdp_phys = acpi_scan_rsdp(0xE0000, 0x20000);
 686
 687         return rsdp_phys;
 688 }
 689
 690 #ifdef  CONFIG_X86_LOCAL_APIC
 691 /*
 692  * Parse LAPIC entries in MADT
 693  * returns 0 on success, < 0 on error
 694  */
 695 static int __init acpi_parse_madt_lapic_entries(void)
 696 {
 697         int count;
 698
 699         /*
 700          * Note that the LAPIC address is obtained from the MADT (32-bit value)
 701          * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value).
 702          */
 703
 704         count =
 705             acpi_table_parse_madt(ACPI_MADT_LAPIC_ADDR_OVR,
 706                                   acpi_parse_lapic_addr_ovr, 0);
 707         if (count < 0) {
 708                 printk(KERN_ERR PREFIX
 709                        "Error parsing LAPIC address override entry\n");
 710                 return count;
 711         }
 712
 713         mp_register_lapic_address(acpi_lapic_addr);
 714
 715         count = acpi_table_parse_madt(ACPI_MADT_LAPIC, acpi_parse_lapic,
 716                                       MAX_APICS);
 717         if (!count) {
 718                 printk(KERN_ERR PREFIX "No LAPIC entries present\n");
 719                 /* TBD: Cleanup to allow fallback to MPS */
 720                 return -ENODEV;
 721         } else if (count < 0) {
 722                 printk(KERN_ERR PREFIX "Error parsing LAPIC entry\n");
 723                 /* TBD: Cleanup to allow fallback to MPS */
 724                 return count;
 725         }
 726
 727         count =
 728             acpi_table_parse_madt(ACPI_MADT_LAPIC_NMI, acpi_parse_lapic_nmi, 0);
 729         if (count < 0) {
 730                 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n");
 731                 /* TBD: Cleanup to allow fallback to MPS */
 732                 return count;
 733         }
 734         return 0;
 735 }
 736 #endif                          /* CONFIG_X86_LOCAL_APIC */
 737
 738 #if defined(CONFIG_X86_IO_APIC) && defined(CONFIG_ACPI_INTERPRETER)
 739 /*
 740  * Parse IOAPIC related entries in MADT
 741  * returns 0 on success, < 0 on error
 742  */
 743 static int __init acpi_parse_madt_ioapic_entries(void)
 744 {
 745         int count;
 746
 747         /*
 748          * ACPI interpreter is required to complete interrupt setup,
 749          * so if it is off, don't enumerate the io-apics with ACPI.
 750          * If MPS is present, it will handle them,
 751          * otherwise the system will stay in PIC mode
 752          */
 753         if (acpi_disabled || acpi_noirq) {
 754                 return -ENODEV;
 755         }
 756
 757         /*
 758          * if "noapic" boot option, don't look for IO-APICs
 759          */
 760         if (skip_ioapic_setup) {
 761                 printk(KERN_INFO PREFIX "Skipping IOAPIC probe "
 762                        "due to 'noapic' option.\n");
 763                 return -ENODEV;
 764         }
 765
 766         count =
 767             acpi_table_parse_madt(ACPI_MADT_IOAPIC, acpi_parse_ioapic,
 768                                   MAX_IO_APICS);
 769         if (!count) {
 770                 printk(KERN_ERR PREFIX "No IOAPIC entries present\n");
 771                 return -ENODEV;
 772         } else if (count < 0) {
 773                 printk(KERN_ERR PREFIX "Error parsing IOAPIC entry\n");
 774                 return count;
 775         }
 776
 777         count =
 778             acpi_table_parse_madt(ACPI_MADT_INT_SRC_OVR, acpi_parse_int_src_ovr,
 779                                   NR_IRQ_VECTORS);
 780         if (count < 0) {
 781                 printk(KERN_ERR PREFIX
 782                        "Error parsing interrupt source overrides entry\n");
 783                 /* TBD: Cleanup to allow fallback to MPS */
 784                 return count;
 785         }
 786
 787         /*
 788          * If BIOS did not supply an INT_SRC_OVR for the SCI
 789          * pretend we got one so we can set the SCI flags.
 790          */
 791         if (!acpi_sci_override_gsi)
 792                 acpi_sci_ioapic_setup(acpi_fadt.sci_int, 0, 0);
 793
 794         /* Fill in identity legacy mapings where no override */
 795         mp_config_acpi_legacy_irqs();
 796
 797         count =
 798             acpi_table_parse_madt(ACPI_MADT_NMI_SRC, acpi_parse_nmi_src,
 799                                   NR_IRQ_VECTORS);
 800         if (count < 0) {
 801                 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n");
 802                 /* TBD: Cleanup to allow fallback to MPS */
 803                 return count;
 804         }
 805
 806         return 0;
 807 }
 808 #else
 809 static inline int acpi_parse_madt_ioapic_entries(void)
 810 {
 811         return -1;
 812 }
 813 #endif                          /* !(CONFIG_X86_IO_APIC && CONFIG_ACPI_INTERPRETER) */
 814
 815 static void __init acpi_process_madt(void)
 816 {
 817 #ifdef CONFIG_X86_LOCAL_APIC
 818         int count, error;
 819
 820         count = acpi_table_parse(ACPI_APIC, acpi_parse_madt);
 821         if (count >= 1) {
 822
 823                 /*
 824                  * Parse MADT LAPIC entries
 825                  */
 826                 error = acpi_parse_madt_lapic_entries();
 827                 if (!error) {
 828                         acpi_lapic = 1;
 829
 830                         /*
 831                          * Parse MADT IO-APIC entries
 832                          */
 833                         error = acpi_parse_madt_ioapic_entries();
 834                         if (!error) {
 835                                 acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC;
 836                                 acpi_irq_balance_set(NULL);
 837                                 acpi_ioapic = 1;
 838
 839                                 smp_found_config = 1;
 840                                 clustered_apic_check();
 841                         }
 842                 }
 843                 if (error == -EINVAL) {
 844                         /*
 845                          * Dell Precision Workstation 410, 610 come here.
 846                          */
 847                         printk(KERN_ERR PREFIX
 848                                "Invalid BIOS MADT, disabling ACPI\n");
 849                         disable_acpi();
 850                 }
 851         }
 852 #endif
 853         return;
 854 }
 855
 856 extern int acpi_force;
 857
 858 #ifdef __i386__
 859
 860 #ifdef  CONFIG_ACPI_PCI
 861 static int __init disable_acpi_irq(struct dmi_system_id *d)
 862 {
 863         if (!acpi_force) {
 864                 printk(KERN_NOTICE "%s detected: force use of acpi=noirq\n",
 865                        d->ident);
 866                 acpi_noirq_set();
 867         }
 868         return 0;
 869 }
 870
 871 static int __init disable_acpi_pci(struct dmi_system_id *d)
 872 {
 873         if (!acpi_force) {
 874                 printk(KERN_NOTICE "%s detected: force use of pci=noacpi\n",
 875                        d->ident);
 876                 acpi_disable_pci();
 877         }
 878         return 0;
 879 }
 880 #endif
 881
 882 static int __init dmi_disable_acpi(struct dmi_system_id *d)
 883 {
 884         if (!acpi_force) {
 885                 printk(KERN_NOTICE "%s detected: acpi off\n", d->ident);
 886                 disable_acpi();
 887         } else {
 888                 printk(KERN_NOTICE
 889                        "Warning: DMI blacklist says broken, but acpi forced\n");
 890         }
 891         return 0;
 892 }
 893
 894 /*
 895  * Limit ACPI to CPU enumeration for HT
 896  */
 897 static int __init force_acpi_ht(struct dmi_system_id *d)
 898 {
 899         if (!acpi_force) {
 900                 printk(KERN_NOTICE "%s detected: force use of acpi=ht\n",
 901                        d->ident);
 902                 disable_acpi();
 903                 acpi_ht = 1;
 904         } else {
 905                 printk(KERN_NOTICE
 906                        "Warning: acpi=force overrules DMI blacklist: acpi=ht\n");
 907         }
 908         return 0;
 909 }
 910
 911 /*
 912  * If your system is blacklisted here, but you find that acpi=force
 913  * works for you, please contact acpi-devel@sourceforge.net
 914  */
 915 static struct dmi_system_id __initdata acpi_dmi_table[] = {
 916         /*
 917          * Boxes that need ACPI disabled
 918          */
 919         {
 920          .callback = dmi_disable_acpi,
 921          .ident = "IBM Thinkpad",
 922          .matches = {
 923                      DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
 924                      DMI_MATCH(DMI_BOARD_NAME, "2629H1G"),
 925                      },
 926          },
 927
 928         /*
 929          * Boxes that need acpi=ht
 930          */
 931         {
 932          .callback = force_acpi_ht,
 933          .ident = "FSC Primergy T850",
 934          .matches = {
 935                      DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
 936                      DMI_MATCH(DMI_PRODUCT_NAME, "PRIMERGY T850"),
 937                      },
 938          },
 939         {
 940          .callback = force_acpi_ht,
 941          .ident = "DELL GX240",
 942          .matches = {
 943                      DMI_MATCH(DMI_BOARD_VENDOR, "Dell Computer Corporation"),
 944                      DMI_MATCH(DMI_BOARD_NAME, "OptiPlex GX240"),
 945                      },
 946          },
 947         {
 948          .callback = force_acpi_ht,
 949          .ident = "HP VISUALIZE NT Workstation",
 950          .matches = {
 951                      DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"),
 952                      DMI_MATCH(DMI_PRODUCT_NAME, "HP VISUALIZE NT Workstation"),
 953                      },
 954          },
 955         {
 956          .callback = force_acpi_ht,
 957          .ident = "Compaq Workstation W8000",
 958          .matches = {
 959                      DMI_MATCH(DMI_SYS_VENDOR, "Compaq"),
 960                      DMI_MATCH(DMI_PRODUCT_NAME, "Workstation W8000"),
 961                      },
 962          },
 963         {
 964          .callback = force_acpi_ht,
 965          .ident = "ASUS P4B266",
 966          .matches = {
 967                      DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
 968                      DMI_MATCH(DMI_BOARD_NAME, "P4B266"),
 969                      },
 970          },
 971         {
 972          .callback = force_acpi_ht,
 973          .ident = "ASUS P2B-DS",
 974          .matches = {
 975                      DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
 976                      DMI_MATCH(DMI_BOARD_NAME, "P2B-DS"),
 977                      },
 978          },
 979         {
 980          .callback = force_acpi_ht,
 981          .ident = "ASUS CUR-DLS",
 982          .matches = {
 983                      DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
 984                      DMI_MATCH(DMI_BOARD_NAME, "CUR-DLS"),
 985                      },
 986          },
 987         {
 988          .callback = force_acpi_ht,
 989          .ident = "ABIT i440BX-W83977",
 990          .matches = {
 991                      DMI_MATCH(DMI_BOARD_VENDOR, "ABIT <http://www.abit.com>"),
 992                      DMI_MATCH(DMI_BOARD_NAME, "i440BX-W83977 (BP6)"),
 993                      },
 994          },
 995         {
 996          .callback = force_acpi_ht,
 997          .ident = "IBM Bladecenter",
 998          .matches = {
 999                      DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1000                      DMI_MATCH(DMI_BOARD_NAME, "IBM eServer BladeCenter HS20"),
1001                      },
1002          },
1003         {
1004          .callback = force_acpi_ht,
1005          .ident = "IBM eServer xSeries 360",
1006          .matches = {
1007                      DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1008                      DMI_MATCH(DMI_BOARD_NAME, "eServer xSeries 360"),
1009                      },
1010          },
1011         {
1012          .callback = force_acpi_ht,
1013          .ident = "IBM eserver xSeries 330",
1014          .matches = {
1015                      DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1016                      DMI_MATCH(DMI_BOARD_NAME, "eserver xSeries 330"),
1017                      },
1018          },
1019         {
1020          .callback = force_acpi_ht,
1021          .ident = "IBM eserver xSeries 440",
1022          .matches = {
1023                      DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1024                      DMI_MATCH(DMI_PRODUCT_NAME, "eserver xSeries 440"),
1025                      },
1026          },
1027
1028 #ifdef  CONFIG_ACPI_PCI
1029         /*
1030          * Boxes that need ACPI PCI IRQ routing disabled
1031          */
1032         {
1033          .callback = disable_acpi_irq,
1034          .ident = "ASUS A7V",
1035          .matches = {
1036                      DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC"),
1037                      DMI_MATCH(DMI_BOARD_NAME, "<A7V>"),
1038                      /* newer BIOS, Revision 1011, does work */
1039                      DMI_MATCH(DMI_BIOS_VERSION,
1040                                "ASUS A7V ACPI BIOS Revision 1007"),
1041                      },
1042          },
1043
1044         /*
1045          * Boxes that need ACPI PCI IRQ routing and PCI scan disabled
1046          */
1047         {                       /* _BBN 0 bug */
1048          .callback = disable_acpi_pci,
1049          .ident = "ASUS PR-DLS",
1050          .matches = {
1051                      DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1052                      DMI_MATCH(DMI_BOARD_NAME, "PR-DLS"),
1053                      DMI_MATCH(DMI_BIOS_VERSION,
1054                                "ASUS PR-DLS ACPI BIOS Revision 1010"),
1055                      DMI_MATCH(DMI_BIOS_DATE, "03/21/2003")
1056                      },
1057          },
1058         {
1059          .callback = disable_acpi_pci,
1060          .ident = "Acer TravelMate 36x Laptop",
1061          .matches = {
1062                      DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
1063                      DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"),
1064                      },
1065          },
1066 #endif
1067         {}
1068 };
1069
1070 #endif                          /* __i386__ */
1071
1072 /*
1073  * acpi_boot_table_init() and acpi_boot_init()
1074  *  called from setup_arch(), always.
1075  *      1. checksums all tables
1076  *      2. enumerates lapics
1077  *      3. enumerates io-apics
1078  *
1079  * acpi_table_init() is separate to allow reading SRAT without
1080  * other side effects.
1081  *
1082  * side effects of acpi_boot_init:
1083  *      acpi_lapic = 1 if LAPIC found
1084  *      acpi_ioapic = 1 if IOAPIC found
1085  *      if (acpi_lapic && acpi_ioapic) smp_found_config = 1;
1086  *      if acpi_blacklisted() acpi_disabled = 1;
1087  *      acpi_irq_model=...
1088  *      ...
1089  *
1090  * return value: (currently ignored)
1091  *      0: success
1092  *      !0: failure
1093  */
1094
1095 int __init acpi_boot_table_init(void)
1096 {
1097         int error;
1098
1099 #ifdef __i386__
1100         dmi_check_system(acpi_dmi_table);
1101 #endif
1102
1103         /*
1104          * If acpi_disabled, bail out
1105          * One exception: acpi=ht continues far enough to enumerate LAPICs
1106          */
1107         if (acpi_disabled && !acpi_ht)
1108                 return 1;
1109
1110         /*
1111          * Initialize the ACPI boot-time table parser.
1112          */
1113         error = acpi_table_init();
1114         if (error) {
1115                 disable_acpi();
1116                 return error;
1117         }
1118 #ifdef __i386__
1119         check_acpi_pci();
1120 #endif
1121
1122         acpi_table_parse(ACPI_BOOT, acpi_parse_sbf);
1123
1124         /*
1125          * blacklist may disable ACPI entirely
1126          */
1127         error = acpi_blacklisted();
1128         if (error) {
1129                 if (acpi_force) {
1130                         printk(KERN_WARNING PREFIX "acpi=force override\n");
1131                 } else {
1132                         printk(KERN_WARNING PREFIX "Disabling ACPI support\n");
1133                         disable_acpi();
1134                         return error;
1135                 }
1136         }
1137
1138         return 0;
1139 }
1140
1141 int __init acpi_boot_init(void)
1142 {
1143         /*
1144          * If acpi_disabled, bail out
1145          * One exception: acpi=ht continues far enough to enumerate LAPICs
1146          */
1147         if (acpi_disabled && !acpi_ht)
1148                 return 1;
1149
1150         acpi_table_parse(ACPI_BOOT, acpi_parse_sbf);
1151
1152         /*
1153          * set sci_int and PM timer address
1154          */
1155         acpi_table_parse(ACPI_FADT, acpi_parse_fadt);
1156
1157         /*
1158          * Process the Multiple APIC Description Table (MADT), if present
1159          */
1160         acpi_process_madt();
1161
1162         acpi_table_parse(ACPI_HPET, acpi_parse_hpet);
1163
1164         return 0;
1165 }