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 #ifdef CONFIG_X86_IO_APIC
 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 /*
 412  * acpi_pic_sci_set_trigger()
 413  *
 414  * use ELCR to set PIC-mode trigger type for SCI
 415  *
 416  * If a PIC-mode SCI is not recognized or gives spurious IRQ7's
 417  * it may require Edge Trigger -- use "acpi_sci=edge"
 418  *
 419  * Port 0x4d0-4d1 are ECLR1 and ECLR2, the Edge/Level Control Registers
 420  * for the 8259 PIC.  bit[n] = 1 means irq[n] is Level, otherwise Edge.
 421  * ECLR1 is IRQ's 0-7 (IRQ 0, 1, 2 must be 0)
 422  * ECLR2 is IRQ's 8-15 (IRQ 8, 13 must be 0)
 423  */
 424
 425 void __init acpi_pic_sci_set_trigger(unsigned int irq, u16 trigger)
 426 {
 427         unsigned int mask = 1 << irq;
 428         unsigned int old, new;
 429
 430         /* Real old ELCR mask */
 431         old = inb(0x4d0) | (inb(0x4d1) << 8);
 432
 433         /*
 434          * If we use ACPI to set PCI irq's, then we should clear ELCR
 435          * since we will set it correctly as we enable the PCI irq
 436          * routing.
 437          */
 438         new = acpi_noirq ? old : 0;
 439
 440         /*
 441          * Update SCI information in the ELCR, it isn't in the PCI
 442          * routing tables..
 443          */
 444         switch (trigger) {
 445         case 1:         /* Edge - clear */
 446                 new &= ~mask;
 447                 break;
 448         case 3:         /* Level - set */
 449                 new |= mask;
 450                 break;
 451         }
 452
 453         if (old == new)
 454                 return;
 455
 456         printk(PREFIX "setting ELCR to %04x (from %04x)\n", new, old);
 457         outb(new, 0x4d0);
 458         outb(new >> 8, 0x4d1);
 459 }
 460
 461 int acpi_gsi_to_irq(u32 gsi, unsigned int *irq)
 462 {
 463 #ifdef CONFIG_X86_IO_APIC
 464         if (use_pci_vector() && !platform_legacy_irq(gsi))
 465                 *irq = IO_APIC_VECTOR(gsi);
 466         else
 467 #endif
 468                 *irq = gsi;
 469         return 0;
 470 }
 471
 472 /*
 473  * success: return IRQ number (>=0)
 474  * failure: return < 0
 475  */
 476 int acpi_register_gsi(u32 gsi, int edge_level, int active_high_low)
 477 {
 478         unsigned int irq;
 479         unsigned int plat_gsi = gsi;
 480
 481 #ifdef CONFIG_PCI
 482         /*
 483          * Make sure all (legacy) PCI IRQs are set as level-triggered.
 484          */
 485         if (acpi_irq_model == ACPI_IRQ_MODEL_PIC) {
 486                 extern void eisa_set_level_irq(unsigned int irq);
 487
 488                 if (edge_level == ACPI_LEVEL_SENSITIVE)
 489                         eisa_set_level_irq(gsi);
 490         }
 491 #endif
 492
 493 #ifdef CONFIG_X86_IO_APIC
 494         if (acpi_irq_model == ACPI_IRQ_MODEL_IOAPIC) {
 495                 plat_gsi = mp_register_gsi(gsi, edge_level, active_high_low);
 496         }
 497 #endif
 498         acpi_gsi_to_irq(plat_gsi, &irq);
 499         return irq;
 500 }
 501
 502 EXPORT_SYMBOL(acpi_register_gsi);
 503
 504 /*
 505  *  ACPI based hotplug support for CPU
 506  */
 507 #ifdef CONFIG_ACPI_HOTPLUG_CPU
 508 int acpi_map_lsapic(acpi_handle handle, int *pcpu)
 509 {
 510         /* TBD */
 511         return -EINVAL;
 512 }
 513
 514 EXPORT_SYMBOL(acpi_map_lsapic);
 515
 516 int acpi_unmap_lsapic(int cpu)
 517 {
 518         /* TBD */
 519         return -EINVAL;
 520 }
 521
 522 EXPORT_SYMBOL(acpi_unmap_lsapic);
 523 #endif                          /* CONFIG_ACPI_HOTPLUG_CPU */
 524
 525 int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base)
 526 {
 527         /* TBD */
 528         return -EINVAL;
 529 }
 530
 531 EXPORT_SYMBOL(acpi_register_ioapic);
 532
 533 int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base)
 534 {
 535         /* TBD */
 536         return -EINVAL;
 537 }
 538
 539 EXPORT_SYMBOL(acpi_unregister_ioapic);
 540
 541 static unsigned long __init
 542 acpi_scan_rsdp(unsigned long start, unsigned long length)
 543 {
 544         unsigned long offset = 0;
 545         unsigned long sig_len = sizeof("RSD PTR ") - 1;
 546
 547         /*
 548          * Scan all 16-byte boundaries of the physical memory region for the
 549          * RSDP signature.
 550          */
 551         for (offset = 0; offset < length; offset += 16) {
 552                 if (strncmp((char *)(start + offset), "RSD PTR ", sig_len))
 553                         continue;
 554                 return (start + offset);
 555         }
 556
 557         return 0;
 558 }
 559
 560 static int __init acpi_parse_sbf(unsigned long phys_addr, unsigned long size)
 561 {
 562         struct acpi_table_sbf *sb;
 563
 564         if (!phys_addr || !size)
 565                 return -EINVAL;
 566
 567         sb = (struct acpi_table_sbf *)__acpi_map_table(phys_addr, size);
 568         if (!sb) {
 569                 printk(KERN_WARNING PREFIX "Unable to map SBF\n");
 570                 return -ENODEV;
 571         }
 572
 573         sbf_port = sb->sbf_cmos;        /* Save CMOS port */
 574
 575         return 0;
 576 }
 577
 578 #ifdef CONFIG_HPET_TIMER
 579
 580 static int __init acpi_parse_hpet(unsigned long phys, unsigned long size)
 581 {
 582         struct acpi_table_hpet *hpet_tbl;
 583
 584         if (!phys || !size)
 585                 return -EINVAL;
 586
 587         hpet_tbl = (struct acpi_table_hpet *)__acpi_map_table(phys, size);
 588         if (!hpet_tbl) {
 589                 printk(KERN_WARNING PREFIX "Unable to map HPET\n");
 590                 return -ENODEV;
 591         }
 592
 593         if (hpet_tbl->addr.space_id != ACPI_SPACE_MEM) {
 594                 printk(KERN_WARNING PREFIX "HPET timers must be located in "
 595                        "memory.\n");
 596                 return -1;
 597         }
 598 #ifdef  CONFIG_X86_64
 599         vxtime.hpet_address = hpet_tbl->addr.addrl |
 600             ((long)hpet_tbl->addr.addrh << 32);
 601
 602         printk(KERN_INFO PREFIX "HPET id: %#x base: %#lx\n",
 603                hpet_tbl->id, vxtime.hpet_address);
 604 #else                           /* X86 */
 605         {
 606                 extern unsigned long hpet_address;
 607
 608                 hpet_address = hpet_tbl->addr.addrl;
 609                 printk(KERN_INFO PREFIX "HPET id: %#x base: %#lx\n",
 610                        hpet_tbl->id, hpet_address);
 611         }
 612 #endif                          /* X86 */
 613
 614         return 0;
 615 }
 616 #else
 617 #define acpi_parse_hpet NULL
 618 #endif
 619
 620 #ifdef CONFIG_X86_PM_TIMER
 621 extern u32 pmtmr_ioport;
 622 #endif
 623
 624 static int __init acpi_parse_fadt(unsigned long phys, unsigned long size)
 625 {
 626         struct fadt_descriptor_rev2 *fadt = NULL;
 627
 628         fadt = (struct fadt_descriptor_rev2 *)__acpi_map_table(phys, size);
 629         if (!fadt) {
 630                 printk(KERN_WARNING PREFIX "Unable to map FADT\n");
 631                 return 0;
 632         }
 633         /* initialize sci_int early for INT_SRC_OVR MADT parsing */
 634         acpi_fadt.sci_int = fadt->sci_int;
 635
 636         /* initialize rev and apic_phys_dest_mode for x86_64 genapic */
 637         acpi_fadt.revision = fadt->revision;
 638         acpi_fadt.force_apic_physical_destination_mode =
 639             fadt->force_apic_physical_destination_mode;
 640
 641 #ifdef CONFIG_X86_PM_TIMER
 642         /* detect the location of the ACPI PM Timer */
 643         if (fadt->revision >= FADT2_REVISION_ID) {
 644                 /* FADT rev. 2 */
 645                 if (fadt->xpm_tmr_blk.address_space_id !=
 646                     ACPI_ADR_SPACE_SYSTEM_IO)
 647                         return 0;
 648
 649                 pmtmr_ioport = fadt->xpm_tmr_blk.address;
 650         } else {
 651                 /* FADT rev. 1 */
 652                 pmtmr_ioport = fadt->V1_pm_tmr_blk;
 653         }
 654         if (pmtmr_ioport)
 655                 printk(KERN_INFO PREFIX "PM-Timer IO Port: %#x\n",
 656                        pmtmr_ioport);
 657 #endif
 658         return 0;
 659 }
 660
 661 unsigned long __init acpi_find_rsdp(void)
 662 {
 663         unsigned long rsdp_phys = 0;
 664
 665         if (efi_enabled) {
 666                 if (efi.acpi20)
 667                         return __pa(efi.acpi20);
 668                 else if (efi.acpi)
 669                         return __pa(efi.acpi);
 670         }
 671         /*
 672          * Scan memory looking for the RSDP signature. First search EBDA (low
 673          * memory) paragraphs and then search upper memory (E0000-FFFFF).
 674          */
 675         rsdp_phys = acpi_scan_rsdp(0, 0x400);
 676         if (!rsdp_phys)
 677                 rsdp_phys = acpi_scan_rsdp(0xE0000, 0x20000);
 678
 679         return rsdp_phys;
 680 }
 681
 682 #ifdef  CONFIG_X86_LOCAL_APIC
 683 /*
 684  * Parse LAPIC entries in MADT
 685  * returns 0 on success, < 0 on error
 686  */
 687 static int __init acpi_parse_madt_lapic_entries(void)
 688 {
 689         int count;
 690
 691         /*
 692          * Note that the LAPIC address is obtained from the MADT (32-bit value)
 693          * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value).
 694          */
 695
 696         count =
 697             acpi_table_parse_madt(ACPI_MADT_LAPIC_ADDR_OVR,
 698                                   acpi_parse_lapic_addr_ovr, 0);
 699         if (count < 0) {
 700                 printk(KERN_ERR PREFIX
 701                        "Error parsing LAPIC address override entry\n");
 702                 return count;
 703         }
 704
 705         mp_register_lapic_address(acpi_lapic_addr);
 706
 707         count = acpi_table_parse_madt(ACPI_MADT_LAPIC, acpi_parse_lapic,
 708                                       MAX_APICS);
 709         if (!count) {
 710                 printk(KERN_ERR PREFIX "No LAPIC entries present\n");
 711                 /* TBD: Cleanup to allow fallback to MPS */
 712                 return -ENODEV;
 713         } else if (count < 0) {
 714                 printk(KERN_ERR PREFIX "Error parsing LAPIC entry\n");
 715                 /* TBD: Cleanup to allow fallback to MPS */
 716                 return count;
 717         }
 718
 719         count =
 720             acpi_table_parse_madt(ACPI_MADT_LAPIC_NMI, acpi_parse_lapic_nmi, 0);
 721         if (count < 0) {
 722                 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n");
 723                 /* TBD: Cleanup to allow fallback to MPS */
 724                 return count;
 725         }
 726         return 0;
 727 }
 728 #endif                          /* CONFIG_X86_LOCAL_APIC */
 729
 730 #ifdef  CONFIG_X86_IO_APIC
 731 /*
 732  * Parse IOAPIC related entries in MADT
 733  * returns 0 on success, < 0 on error
 734  */
 735 static int __init acpi_parse_madt_ioapic_entries(void)
 736 {
 737         int count;
 738
 739         /*
 740          * ACPI interpreter is required to complete interrupt setup,
 741          * so if it is off, don't enumerate the io-apics with ACPI.
 742          * If MPS is present, it will handle them,
 743          * otherwise the system will stay in PIC mode
 744          */
 745         if (acpi_disabled || acpi_noirq) {
 746                 return -ENODEV;
 747         }
 748
 749         /*
 750          * if "noapic" boot option, don't look for IO-APICs
 751          */
 752         if (skip_ioapic_setup) {
 753                 printk(KERN_INFO PREFIX "Skipping IOAPIC probe "
 754                        "due to 'noapic' option.\n");
 755                 return -ENODEV;
 756         }
 757
 758         count =
 759             acpi_table_parse_madt(ACPI_MADT_IOAPIC, acpi_parse_ioapic,
 760                                   MAX_IO_APICS);
 761         if (!count) {
 762                 printk(KERN_ERR PREFIX "No IOAPIC entries present\n");
 763                 return -ENODEV;
 764         } else if (count < 0) {
 765                 printk(KERN_ERR PREFIX "Error parsing IOAPIC entry\n");
 766                 return count;
 767         }
 768
 769         count =
 770             acpi_table_parse_madt(ACPI_MADT_INT_SRC_OVR, acpi_parse_int_src_ovr,
 771                                   NR_IRQ_VECTORS);
 772         if (count < 0) {
 773                 printk(KERN_ERR PREFIX
 774                        "Error parsing interrupt source overrides entry\n");
 775                 /* TBD: Cleanup to allow fallback to MPS */
 776                 return count;
 777         }
 778
 779         /*
 780          * If BIOS did not supply an INT_SRC_OVR for the SCI
 781          * pretend we got one so we can set the SCI flags.
 782          */
 783         if (!acpi_sci_override_gsi)
 784                 acpi_sci_ioapic_setup(acpi_fadt.sci_int, 0, 0);
 785
 786         /* Fill in identity legacy mapings where no override */
 787         mp_config_acpi_legacy_irqs();
 788
 789         count =
 790             acpi_table_parse_madt(ACPI_MADT_NMI_SRC, acpi_parse_nmi_src,
 791                                   NR_IRQ_VECTORS);
 792         if (count < 0) {
 793                 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n");
 794                 /* TBD: Cleanup to allow fallback to MPS */
 795                 return count;
 796         }
 797
 798         return 0;
 799 }
 800 #else
 801 static inline int acpi_parse_madt_ioapic_entries(void)
 802 {
 803         return -1;
 804 }
 805 #endif  /* !CONFIG_X86_IO_APIC */
 806
 807 static void __init acpi_process_madt(void)
 808 {
 809 #ifdef CONFIG_X86_LOCAL_APIC
 810         int count, error;
 811
 812         count = acpi_table_parse(ACPI_APIC, acpi_parse_madt);
 813         if (count >= 1) {
 814
 815                 /*
 816                  * Parse MADT LAPIC entries
 817                  */
 818                 error = acpi_parse_madt_lapic_entries();
 819                 if (!error) {
 820                         acpi_lapic = 1;
 821
 822                         /*
 823                          * Parse MADT IO-APIC entries
 824                          */
 825                         error = acpi_parse_madt_ioapic_entries();
 826                         if (!error) {
 827                                 acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC;
 828                                 acpi_irq_balance_set(NULL);
 829                                 acpi_ioapic = 1;
 830
 831                                 smp_found_config = 1;
 832                                 clustered_apic_check();
 833                         }
 834                 }
 835                 if (error == -EINVAL) {
 836                         /*
 837                          * Dell Precision Workstation 410, 610 come here.
 838                          */
 839                         printk(KERN_ERR PREFIX
 840                                "Invalid BIOS MADT, disabling ACPI\n");
 841                         disable_acpi();
 842                 }
 843         }
 844 #endif
 845         return;
 846 }
 847
 848 extern int acpi_force;
 849
 850 #ifdef __i386__
 851
 852 #ifdef  CONFIG_ACPI_PCI
 853 static int __init disable_acpi_irq(struct dmi_system_id *d)
 854 {
 855         if (!acpi_force) {
 856                 printk(KERN_NOTICE "%s detected: force use of acpi=noirq\n",
 857                        d->ident);
 858                 acpi_noirq_set();
 859         }
 860         return 0;
 861 }
 862
 863 static int __init disable_acpi_pci(struct dmi_system_id *d)
 864 {
 865         if (!acpi_force) {
 866                 printk(KERN_NOTICE "%s detected: force use of pci=noacpi\n",
 867                        d->ident);
 868                 acpi_disable_pci();
 869         }
 870         return 0;
 871 }
 872 #endif
 873
 874 static int __init dmi_disable_acpi(struct dmi_system_id *d)
 875 {
 876         if (!acpi_force) {
 877                 printk(KERN_NOTICE "%s detected: acpi off\n", d->ident);
 878                 disable_acpi();
 879         } else {
 880                 printk(KERN_NOTICE
 881                        "Warning: DMI blacklist says broken, but acpi forced\n");
 882         }
 883         return 0;
 884 }
 885
 886 /*
 887  * Limit ACPI to CPU enumeration for HT
 888  */
 889 static int __init force_acpi_ht(struct dmi_system_id *d)
 890 {
 891         if (!acpi_force) {
 892                 printk(KERN_NOTICE "%s detected: force use of acpi=ht\n",
 893                        d->ident);
 894                 disable_acpi();
 895                 acpi_ht = 1;
 896         } else {
 897                 printk(KERN_NOTICE
 898                        "Warning: acpi=force overrules DMI blacklist: acpi=ht\n");
 899         }
 900         return 0;
 901 }
 902
 903 /*
 904  * If your system is blacklisted here, but you find that acpi=force
 905  * works for you, please contact acpi-devel@sourceforge.net
 906  */
 907 static struct dmi_system_id __initdata acpi_dmi_table[] = {
 908         /*
 909          * Boxes that need ACPI disabled
 910          */
 911         {
 912          .callback = dmi_disable_acpi,
 913          .ident = "IBM Thinkpad",
 914          .matches = {
 915                      DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
 916                      DMI_MATCH(DMI_BOARD_NAME, "2629H1G"),
 917                      },
 918          },
 919
 920         /*
 921          * Boxes that need acpi=ht
 922          */
 923         {
 924          .callback = force_acpi_ht,
 925          .ident = "FSC Primergy T850",
 926          .matches = {
 927                      DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
 928                      DMI_MATCH(DMI_PRODUCT_NAME, "PRIMERGY T850"),
 929                      },
 930          },
 931         {
 932          .callback = force_acpi_ht,
 933          .ident = "DELL GX240",
 934          .matches = {
 935                      DMI_MATCH(DMI_BOARD_VENDOR, "Dell Computer Corporation"),
 936                      DMI_MATCH(DMI_BOARD_NAME, "OptiPlex GX240"),
 937                      },
 938          },
 939         {
 940          .callback = force_acpi_ht,
 941          .ident = "HP VISUALIZE NT Workstation",
 942          .matches = {
 943                      DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"),
 944                      DMI_MATCH(DMI_PRODUCT_NAME, "HP VISUALIZE NT Workstation"),
 945                      },
 946          },
 947         {
 948          .callback = force_acpi_ht,
 949          .ident = "Compaq Workstation W8000",
 950          .matches = {
 951                      DMI_MATCH(DMI_SYS_VENDOR, "Compaq"),
 952                      DMI_MATCH(DMI_PRODUCT_NAME, "Workstation W8000"),
 953                      },
 954          },
 955         {
 956          .callback = force_acpi_ht,
 957          .ident = "ASUS P4B266",
 958          .matches = {
 959                      DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
 960                      DMI_MATCH(DMI_BOARD_NAME, "P4B266"),
 961                      },
 962          },
 963         {
 964          .callback = force_acpi_ht,
 965          .ident = "ASUS P2B-DS",
 966          .matches = {
 967                      DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
 968                      DMI_MATCH(DMI_BOARD_NAME, "P2B-DS"),
 969                      },
 970          },
 971         {
 972          .callback = force_acpi_ht,
 973          .ident = "ASUS CUR-DLS",
 974          .matches = {
 975                      DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
 976                      DMI_MATCH(DMI_BOARD_NAME, "CUR-DLS"),
 977                      },
 978          },
 979         {
 980          .callback = force_acpi_ht,
 981          .ident = "ABIT i440BX-W83977",
 982          .matches = {
 983                      DMI_MATCH(DMI_BOARD_VENDOR, "ABIT <http://www.abit.com>"),
 984                      DMI_MATCH(DMI_BOARD_NAME, "i440BX-W83977 (BP6)"),
 985                      },
 986          },
 987         {
 988          .callback = force_acpi_ht,
 989          .ident = "IBM Bladecenter",
 990          .matches = {
 991                      DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
 992                      DMI_MATCH(DMI_BOARD_NAME, "IBM eServer BladeCenter HS20"),
 993                      },
 994          },
 995         {
 996          .callback = force_acpi_ht,
 997          .ident = "IBM eServer xSeries 360",
 998          .matches = {
 999                      DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1000                      DMI_MATCH(DMI_BOARD_NAME, "eServer xSeries 360"),
1001                      },
1002          },
1003         {
1004          .callback = force_acpi_ht,
1005          .ident = "IBM eserver xSeries 330",
1006          .matches = {
1007                      DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1008                      DMI_MATCH(DMI_BOARD_NAME, "eserver xSeries 330"),
1009                      },
1010          },
1011         {
1012          .callback = force_acpi_ht,
1013          .ident = "IBM eserver xSeries 440",
1014          .matches = {
1015                      DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1016                      DMI_MATCH(DMI_PRODUCT_NAME, "eserver xSeries 440"),
1017                      },
1018          },
1019
1020 #ifdef  CONFIG_ACPI_PCI
1021         /*
1022          * Boxes that need ACPI PCI IRQ routing disabled
1023          */
1024         {
1025          .callback = disable_acpi_irq,
1026          .ident = "ASUS A7V",
1027          .matches = {
1028                      DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC"),
1029                      DMI_MATCH(DMI_BOARD_NAME, "<A7V>"),
1030                      /* newer BIOS, Revision 1011, does work */
1031                      DMI_MATCH(DMI_BIOS_VERSION,
1032                                "ASUS A7V ACPI BIOS Revision 1007"),
1033                      },
1034          },
1035
1036         /*
1037          * Boxes that need ACPI PCI IRQ routing and PCI scan disabled
1038          */
1039         {                       /* _BBN 0 bug */
1040          .callback = disable_acpi_pci,
1041          .ident = "ASUS PR-DLS",
1042          .matches = {
1043                      DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1044                      DMI_MATCH(DMI_BOARD_NAME, "PR-DLS"),
1045                      DMI_MATCH(DMI_BIOS_VERSION,
1046                                "ASUS PR-DLS ACPI BIOS Revision 1010"),
1047                      DMI_MATCH(DMI_BIOS_DATE, "03/21/2003")
1048                      },
1049          },
1050         {
1051          .callback = disable_acpi_pci,
1052          .ident = "Acer TravelMate 36x Laptop",
1053          .matches = {
1054                      DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
1055                      DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"),
1056                      },
1057          },
1058 #endif
1059         {}
1060 };
1061
1062 #endif                          /* __i386__ */
1063
1064 /*
1065  * acpi_boot_table_init() and acpi_boot_init()
1066  *  called from setup_arch(), always.
1067  *      1. checksums all tables
1068  *      2. enumerates lapics
1069  *      3. enumerates io-apics
1070  *
1071  * acpi_table_init() is separate to allow reading SRAT without
1072  * other side effects.
1073  *
1074  * side effects of acpi_boot_init:
1075  *      acpi_lapic = 1 if LAPIC found
1076  *      acpi_ioapic = 1 if IOAPIC found
1077  *      if (acpi_lapic && acpi_ioapic) smp_found_config = 1;
1078  *      if acpi_blacklisted() acpi_disabled = 1;
1079  *      acpi_irq_model=...
1080  *      ...
1081  *
1082  * return value: (currently ignored)
1083  *      0: success
1084  *      !0: failure
1085  */
1086
1087 int __init acpi_boot_table_init(void)
1088 {
1089         int error;
1090
1091 #ifdef __i386__
1092         dmi_check_system(acpi_dmi_table);
1093 #endif
1094
1095         /*
1096          * If acpi_disabled, bail out
1097          * One exception: acpi=ht continues far enough to enumerate LAPICs
1098          */
1099         if (acpi_disabled && !acpi_ht)
1100                 return 1;
1101
1102         /*
1103          * Initialize the ACPI boot-time table parser.
1104          */
1105         error = acpi_table_init();
1106         if (error) {
1107                 disable_acpi();
1108                 return error;
1109         }
1110 #ifdef __i386__
1111         check_acpi_pci();
1112 #endif
1113
1114         acpi_table_parse(ACPI_BOOT, acpi_parse_sbf);
1115
1116         /*
1117          * blacklist may disable ACPI entirely
1118          */
1119         error = acpi_blacklisted();
1120         if (error) {
1121                 if (acpi_force) {
1122                         printk(KERN_WARNING PREFIX "acpi=force override\n");
1123                 } else {
1124                         printk(KERN_WARNING PREFIX "Disabling ACPI support\n");
1125                         disable_acpi();
1126                         return error;
1127                 }
1128         }
1129
1130         return 0;
1131 }
1132
1133 int __init acpi_boot_init(void)
1134 {
1135         /*
1136          * If acpi_disabled, bail out
1137          * One exception: acpi=ht continues far enough to enumerate LAPICs
1138          */
1139         if (acpi_disabled && !acpi_ht)
1140                 return 1;
1141
1142         acpi_table_parse(ACPI_BOOT, acpi_parse_sbf);
1143
1144         /*
1145          * set sci_int and PM timer address
1146          */
1147         acpi_table_parse(ACPI_FADT, acpi_parse_fadt);
1148
1149         /*
1150          * Process the Multiple APIC Description Table (MADT), if present
1151          */
1152         acpi_process_madt();
1153
1154         acpi_table_parse(ACPI_HPET, acpi_parse_hpet);
1155
1156         return 0;
1157 }