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
  33 #include <asm/pgtable.h>
  34 #include <asm/io_apic.h>
  35 #include <asm/apic.h>
  36 #include <asm/io.h>
  37 #include <asm/irq.h>
  38 #include <asm/mpspec.h>
  39
  40 #ifdef  CONFIG_X86_64
  41
  42 static inline void  acpi_madt_oem_check(char *oem_id, char *oem_table_id) { }
  43 extern void __init clustered_apic_check(void);
  44 static inline int ioapic_setup_disabled(void) { return 0; }
  45 #include <asm/proto.h>
  46
  47 #else   /* X86 */
  48
  49 #ifdef  CONFIG_X86_LOCAL_APIC
  50 #include <mach_apic.h>
  51 #include <mach_mpparse.h>
  52 #endif  /* CONFIG_X86_LOCAL_APIC */
  53
  54 #endif  /* X86 */
  55
  56 #define BAD_MADT_ENTRY(entry, end) (                                        \
  57                 (!entry) || (unsigned long)entry + sizeof(*entry) > end ||  \
  58                 ((acpi_table_entry_header *)entry)->length != sizeof(*entry))
  59
  60 #define PREFIX                  "ACPI: "
  61
  62 #ifdef CONFIG_ACPI_PCI
  63 int acpi_noirq __initdata;      /* skip ACPI IRQ initialization */
  64 int acpi_pci_disabled __initdata; /* skip ACPI PCI scan and IRQ initialization */
  65 #else
  66 int acpi_noirq __initdata = 1;
  67 int acpi_pci_disabled __initdata = 1;
  68 #endif
  69 int acpi_ht __initdata = 1;     /* enable HT */
  70
  71 int acpi_lapic;
  72 int acpi_ioapic;
  73 int acpi_strict;
  74 EXPORT_SYMBOL(acpi_strict);
  75
  76 acpi_interrupt_flags acpi_sci_flags __initdata;
  77 int acpi_sci_override_gsi __initdata;
  78 int acpi_skip_timer_override __initdata;
  79
  80 #ifdef CONFIG_X86_LOCAL_APIC
  81 static u64 acpi_lapic_addr __initdata = APIC_DEFAULT_PHYS_BASE;
  82 #endif
  83
  84 #ifndef __HAVE_ARCH_CMPXCHG
  85 #warning ACPI uses CMPXCHG, i486 and later hardware
  86 #endif
  87
  88 #define MAX_MADT_ENTRIES        256
  89 u8 x86_acpiid_to_apicid[MAX_MADT_ENTRIES] =
  90                         { [0 ... MAX_MADT_ENTRIES-1] = 0xff };
  91 EXPORT_SYMBOL(x86_acpiid_to_apicid);
  92
  93 /* --------------------------------------------------------------------------
  94                               Boot-time Configuration
  95    -------------------------------------------------------------------------- */
  96
  97 /*
  98  * The default interrupt routing model is PIC (8259).  This gets
  99  * overriden if IOAPICs are enumerated (below).
 100  */
 101 enum acpi_irq_model_id          acpi_irq_model = ACPI_IRQ_MODEL_PIC;
 102
 103 #ifdef  CONFIG_X86_64
 104
 105 /* rely on all ACPI tables being in the direct mapping */
 106 char *__acpi_map_table(unsigned long phys_addr, unsigned long size)
 107 {
 108         if (!phys_addr || !size)
 109         return NULL;
 110
 111         if (phys_addr < (end_pfn_map << PAGE_SHIFT))
 112                 return __va(phys_addr);
 113
 114         return NULL;
 115 }
 116
 117 #else
 118
 119 /*
 120  * Temporarily use the virtual area starting from FIX_IO_APIC_BASE_END,
 121  * to map the target physical address. The problem is that set_fixmap()
 122  * provides a single page, and it is possible that the page is not
 123  * sufficient.
 124  * By using this area, we can map up to MAX_IO_APICS pages temporarily,
 125  * i.e. until the next __va_range() call.
 126  *
 127  * Important Safety Note:  The fixed I/O APIC page numbers are *subtracted*
 128  * from the fixed base.  That's why we start at FIX_IO_APIC_BASE_END and
 129  * count idx down while incrementing the phys address.
 130  */
 131 char *__acpi_map_table(unsigned long phys, unsigned long size)
 132 {
 133         unsigned long base, offset, mapped_size;
 134         int idx;
 135
 136         if (phys + size < 8*1024*1024)
 137                 return __va(phys);
 138
 139         offset = phys & (PAGE_SIZE - 1);
 140         mapped_size = PAGE_SIZE - offset;
 141         set_fixmap(FIX_ACPI_END, phys);
 142         base = fix_to_virt(FIX_ACPI_END);
 143
 144         /*
 145          * Most cases can be covered by the below.
 146          */
 147         idx = FIX_ACPI_END;
 148         while (mapped_size < size) {
 149                 if (--idx < FIX_ACPI_BEGIN)
 150                         return NULL;    /* cannot handle this */
 151                 phys += PAGE_SIZE;
 152                 set_fixmap(idx, phys);
 153                 mapped_size += PAGE_SIZE;
 154         }
 155
 156         return ((unsigned char *) base + offset);
 157 }
 158 #endif
 159
 160 #ifdef CONFIG_PCI_MMCONFIG
 161 static int __init acpi_parse_mcfg(unsigned long phys_addr, unsigned long size)
 162 {
 163         struct acpi_table_mcfg *mcfg;
 164
 165         if (!phys_addr || !size)
 166                 return -EINVAL;
 167
 168         mcfg = (struct acpi_table_mcfg *) __acpi_map_table(phys_addr, size);
 169         if (!mcfg) {
 170                 printk(KERN_WARNING PREFIX "Unable to map MCFG\n");
 171                 return -ENODEV;
 172         }
 173
 174         if (mcfg->base_reserved) {
 175                 printk(KERN_ERR PREFIX "MMCONFIG not in low 4GB of memory\n");
 176                 return -ENODEV;
 177         }
 178
 179         pci_mmcfg_base_addr = mcfg->base_address;
 180
 181         return 0;
 182 }
 183 #else
 184 #define acpi_parse_mcfg NULL
 185 #endif /* !CONFIG_PCI_MMCONFIG */
 186
 187 #ifdef CONFIG_X86_LOCAL_APIC
 188 static int __init
 189 acpi_parse_madt (
 190         unsigned long           phys_addr,
 191         unsigned long           size)
 192 {
 193         struct acpi_table_madt  *madt = NULL;
 194
 195         if (!phys_addr || !size)
 196                 return -EINVAL;
 197
 198         madt = (struct acpi_table_madt *) __acpi_map_table(phys_addr, size);
 199         if (!madt) {
 200                 printk(KERN_WARNING PREFIX "Unable to map MADT\n");
 201                 return -ENODEV;
 202         }
 203
 204         if (madt->lapic_address) {
 205                 acpi_lapic_addr = (u64) madt->lapic_address;
 206
 207                 printk(KERN_DEBUG PREFIX "Local APIC address 0x%08x\n",
 208                         madt->lapic_address);
 209         }
 210
 211         acpi_madt_oem_check(madt->header.oem_id, madt->header.oem_table_id);
 212
 213         return 0;
 214 }
 215
 216
 217 static int __init
 218 acpi_parse_lapic (
 219         acpi_table_entry_header *header, const unsigned long end)
 220 {
 221         struct acpi_table_lapic *processor = NULL;
 222
 223         processor = (struct acpi_table_lapic*) header;
 224
 225         if (BAD_MADT_ENTRY(processor, end))
 226                 return -EINVAL;
 227
 228         acpi_table_print_madt_entry(header);
 229
 230         /* no utility in registering a disabled processor */
 231         if (processor->flags.enabled == 0)
 232                 return 0;
 233
 234         x86_acpiid_to_apicid[processor->acpi_id] = processor->id;
 235
 236         mp_register_lapic (
 237                 processor->id,                                     /* APIC ID */
 238                 processor->flags.enabled);                        /* Enabled? */
 239
 240         return 0;
 241 }
 242
 243 static int __init
 244 acpi_parse_lapic_addr_ovr (
 245         acpi_table_entry_header *header, const unsigned long end)
 246 {
 247         struct acpi_table_lapic_addr_ovr *lapic_addr_ovr = NULL;
 248
 249         lapic_addr_ovr = (struct acpi_table_lapic_addr_ovr*) header;
 250
 251         if (BAD_MADT_ENTRY(lapic_addr_ovr, end))
 252                 return -EINVAL;
 253
 254         acpi_lapic_addr = lapic_addr_ovr->address;
 255
 256         return 0;
 257 }
 258
 259 static int __init
 260 acpi_parse_lapic_nmi (
 261         acpi_table_entry_header *header, const unsigned long end)
 262 {
 263         struct acpi_table_lapic_nmi *lapic_nmi = NULL;
 264
 265         lapic_nmi = (struct acpi_table_lapic_nmi*) header;
 266
 267         if (BAD_MADT_ENTRY(lapic_nmi, end))
 268                 return -EINVAL;
 269
 270         acpi_table_print_madt_entry(header);
 271
 272         if (lapic_nmi->lint != 1)
 273                 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n");
 274
 275         return 0;
 276 }
 277
 278
 279 #endif /*CONFIG_X86_LOCAL_APIC*/
 280
 281 #if defined(CONFIG_X86_IO_APIC) && defined(CONFIG_ACPI_INTERPRETER)
 282
 283 static int __init
 284 acpi_parse_ioapic (
 285         acpi_table_entry_header *header, const unsigned long end)
 286 {
 287         struct acpi_table_ioapic *ioapic = NULL;
 288
 289         ioapic = (struct acpi_table_ioapic*) header;
 290
 291         if (BAD_MADT_ENTRY(ioapic, end))
 292                 return -EINVAL;
 293
 294         acpi_table_print_madt_entry(header);
 295
 296         mp_register_ioapic (
 297                 ioapic->id,
 298                 ioapic->address,
 299                 ioapic->global_irq_base);
 300
 301         return 0;
 302 }
 303
 304 /*
 305  * Parse Interrupt Source Override for the ACPI SCI
 306  */
 307 static void
 308 acpi_sci_ioapic_setup(u32 gsi, u16 polarity, u16 trigger)
 309 {
 310         if (trigger == 0)       /* compatible SCI trigger is level */
 311                 trigger = 3;
 312
 313         if (polarity == 0)      /* compatible SCI polarity is low */
 314                 polarity = 3;
 315
 316         /* Command-line over-ride via acpi_sci= */
 317         if (acpi_sci_flags.trigger)
 318                 trigger = acpi_sci_flags.trigger;
 319
 320         if (acpi_sci_flags.polarity)
 321                 polarity = acpi_sci_flags.polarity;
 322
 323         /*
 324          * mp_config_acpi_legacy_irqs() already setup IRQs < 16
 325          * If GSI is < 16, this will update its flags,
 326          * else it will create a new mp_irqs[] entry.
 327          */
 328         mp_override_legacy_irq(gsi, polarity, trigger, gsi);
 329
 330         /*
 331          * stash over-ride to indicate we've been here
 332          * and for later update of acpi_fadt
 333          */
 334         acpi_sci_override_gsi = gsi;
 335         return;
 336 }
 337
 338 static int __init
 339 acpi_parse_int_src_ovr (
 340         acpi_table_entry_header *header, const unsigned long end)
 341 {
 342         struct acpi_table_int_src_ovr *intsrc = NULL;
 343
 344         intsrc = (struct acpi_table_int_src_ovr*) header;
 345
 346         if (BAD_MADT_ENTRY(intsrc, end))
 347                 return -EINVAL;
 348
 349         acpi_table_print_madt_entry(header);
 350
 351         if (intsrc->bus_irq == acpi_fadt.sci_int) {
 352                 acpi_sci_ioapic_setup(intsrc->global_irq,
 353                         intsrc->flags.polarity, intsrc->flags.trigger);
 354                 return 0;
 355         }
 356
 357         if (acpi_skip_timer_override &&
 358                 intsrc->bus_irq == 0 && intsrc->global_irq == 2) {
 359                         printk(PREFIX "BIOS IRQ0 pin2 override ignored.\n");
 360                         return 0;
 361         }
 362
 363         mp_override_legacy_irq (
 364                 intsrc->bus_irq,
 365                 intsrc->flags.polarity,
 366                 intsrc->flags.trigger,
 367                 intsrc->global_irq);
 368
 369         return 0;
 370 }
 371
 372
 373 static int __init
 374 acpi_parse_nmi_src (
 375         acpi_table_entry_header *header, const unsigned long end)
 376 {
 377         struct acpi_table_nmi_src *nmi_src = NULL;
 378
 379         nmi_src = (struct acpi_table_nmi_src*) header;
 380
 381         if (BAD_MADT_ENTRY(nmi_src, end))
 382                 return -EINVAL;
 383
 384         acpi_table_print_madt_entry(header);
 385
 386         /* TBD: Support nimsrc entries? */
 387
 388         return 0;
 389 }
 390
 391 #endif /* CONFIG_X86_IO_APIC */
 392
 393 #ifdef  CONFIG_ACPI_BUS
 394
 395 /*
 396  * acpi_pic_sci_set_trigger()
 397  *
 398  * use ELCR to set PIC-mode trigger type for SCI
 399  *
 400  * If a PIC-mode SCI is not recognized or gives spurious IRQ7's
 401  * it may require Edge Trigger -- use "acpi_sci=edge"
 402  *
 403  * Port 0x4d0-4d1 are ECLR1 and ECLR2, the Edge/Level Control Registers
 404  * for the 8259 PIC.  bit[n] = 1 means irq[n] is Level, otherwise Edge.
 405  * ECLR1 is IRQ's 0-7 (IRQ 0, 1, 2 must be 0)
 406  * ECLR2 is IRQ's 8-15 (IRQ 8, 13 must be 0)
 407  */
 408
 409 void __init
 410 acpi_pic_sci_set_trigger(unsigned int irq, u16 trigger)
 411 {
 412         unsigned int mask = 1 << irq;
 413         unsigned int old, new;
 414
 415         /* Real old ELCR mask */
 416         old = inb(0x4d0) | (inb(0x4d1) << 8);
 417
 418         /*
 419          * If we use ACPI to set PCI irq's, then we should clear ELCR
 420          * since we will set it correctly as we enable the PCI irq
 421          * routing.
 422          */
 423         new = acpi_noirq ? old : 0;
 424
 425         /*
 426          * Update SCI information in the ELCR, it isn't in the PCI
 427          * routing tables..
 428          */
 429         switch (trigger) {
 430         case 1: /* Edge - clear */
 431                 new &= ~mask;
 432                 break;
 433         case 3: /* Level - set */
 434                 new |= mask;
 435                 break;
 436         }
 437
 438         if (old == new)
 439                 return;
 440
 441         printk(PREFIX "setting ELCR to %04x (from %04x)\n", new, old);
 442         outb(new, 0x4d0);
 443         outb(new >> 8, 0x4d1);
 444 }
 445
 446
 447 #endif /* CONFIG_ACPI_BUS */
 448
 449 int acpi_gsi_to_irq(u32 gsi, unsigned int *irq)
 450 {
 451 #ifdef CONFIG_X86_IO_APIC
 452         if (use_pci_vector() && !platform_legacy_irq(gsi))
 453                 *irq = IO_APIC_VECTOR(gsi);
 454         else
 455 #endif
 456                 *irq = gsi;
 457         return 0;
 458 }
 459
 460 unsigned int acpi_register_gsi(u32 gsi, int edge_level, int active_high_low)
 461 {
 462         unsigned int irq;
 463         unsigned int plat_gsi = gsi;
 464
 465 #ifdef CONFIG_PCI
 466         /*
 467          * Make sure all (legacy) PCI IRQs are set as level-triggered.
 468          */
 469         if (acpi_irq_model == ACPI_IRQ_MODEL_PIC) {
 470                 extern void eisa_set_level_irq(unsigned int irq);
 471
 472                 if (edge_level == ACPI_LEVEL_SENSITIVE)
 473                                 eisa_set_level_irq(gsi);
 474         }
 475 #endif
 476
 477 #ifdef CONFIG_X86_IO_APIC
 478         if (acpi_irq_model == ACPI_IRQ_MODEL_IOAPIC) {
 479                 plat_gsi = mp_register_gsi(gsi, edge_level, active_high_low);
 480         }
 481 #endif
 482         acpi_gsi_to_irq(plat_gsi, &irq);
 483         return irq;
 484 }
 485 EXPORT_SYMBOL(acpi_register_gsi);
 486
 487 /*
 488  *  ACPI based hotplug support for CPU
 489  */
 490 #ifdef CONFIG_ACPI_HOTPLUG_CPU
 491 int
 492 acpi_map_lsapic(acpi_handle handle, int *pcpu)
 493 {
 494         /* TBD */
 495         return -EINVAL;
 496 }
 497 EXPORT_SYMBOL(acpi_map_lsapic);
 498
 499
 500 int
 501 acpi_unmap_lsapic(int cpu)
 502 {
 503         /* TBD */
 504         return -EINVAL;
 505 }
 506 EXPORT_SYMBOL(acpi_unmap_lsapic);
 507 #endif /* CONFIG_ACPI_HOTPLUG_CPU */
 508
 509 static unsigned long __init
 510 acpi_scan_rsdp (
 511         unsigned long           start,
 512         unsigned long           length)
 513 {
 514         unsigned long           offset = 0;
 515         unsigned long           sig_len = sizeof("RSD PTR ") - 1;
 516
 517         /*
 518          * Scan all 16-byte boundaries of the physical memory region for the
 519          * RSDP signature.
 520          */
 521         for (offset = 0; offset < length; offset += 16) {
 522                 if (strncmp((char *) (start + offset), "RSD PTR ", sig_len))
 523                         continue;
 524                 return (start + offset);
 525         }
 526
 527         return 0;
 528 }
 529
 530 static int __init acpi_parse_sbf(unsigned long phys_addr, unsigned long size)
 531 {
 532         struct acpi_table_sbf *sb;
 533
 534         if (!phys_addr || !size)
 535         return -EINVAL;
 536
 537         sb = (struct acpi_table_sbf *) __acpi_map_table(phys_addr, size);
 538         if (!sb) {
 539                 printk(KERN_WARNING PREFIX "Unable to map SBF\n");
 540                 return -ENODEV;
 541         }
 542
 543         sbf_port = sb->sbf_cmos; /* Save CMOS port */
 544
 545         return 0;
 546 }
 547
 548
 549 #ifdef CONFIG_HPET_TIMER
 550
 551 static int __init acpi_parse_hpet(unsigned long phys, unsigned long size)
 552 {
 553         struct acpi_table_hpet *hpet_tbl;
 554
 555         if (!phys || !size)
 556                 return -EINVAL;
 557
 558         hpet_tbl = (struct acpi_table_hpet *) __acpi_map_table(phys, size);
 559         if (!hpet_tbl) {
 560                 printk(KERN_WARNING PREFIX "Unable to map HPET\n");
 561                 return -ENODEV;
 562         }
 563
 564         if (hpet_tbl->addr.space_id != ACPI_SPACE_MEM) {
 565                 printk(KERN_WARNING PREFIX "HPET timers must be located in "
 566                        "memory.\n");
 567                 return -1;
 568         }
 569
 570 #ifdef  CONFIG_X86_64
 571         vxtime.hpet_address = hpet_tbl->addr.addrl |
 572                 ((long) hpet_tbl->addr.addrh << 32);
 573
 574         printk(KERN_INFO PREFIX "HPET id: %#x base: %#lx\n",
 575                hpet_tbl->id, vxtime.hpet_address);
 576 #else   /* X86 */
 577         {
 578                 extern unsigned long hpet_address;
 579
 580                 hpet_address = hpet_tbl->addr.addrl;
 581                 printk(KERN_INFO PREFIX "HPET id: %#x base: %#lx\n",
 582                         hpet_tbl->id, hpet_address);
 583         }
 584 #endif  /* X86 */
 585
 586         return 0;
 587 }
 588 #else
 589 #define acpi_parse_hpet NULL
 590 #endif
 591
 592 #ifdef CONFIG_X86_PM_TIMER
 593 extern u32 pmtmr_ioport;
 594 #endif
 595
 596 static int __init acpi_parse_fadt(unsigned long phys, unsigned long size)
 597 {
 598         struct fadt_descriptor_rev2 *fadt = NULL;
 599
 600         fadt = (struct fadt_descriptor_rev2*) __acpi_map_table(phys,size);
 601         if(!fadt) {
 602                 printk(KERN_WARNING PREFIX "Unable to map FADT\n");
 603                 return 0;
 604         }
 605
 606 #ifdef  CONFIG_ACPI_INTERPRETER
 607         /* initialize sci_int early for INT_SRC_OVR MADT parsing */
 608         acpi_fadt.sci_int = fadt->sci_int;
 609 #endif
 610
 611 #ifdef CONFIG_ACPI_BUS
 612         /* initialize rev and apic_phys_dest_mode for x86_64 genapic */
 613         acpi_fadt.revision = fadt->revision;
 614         acpi_fadt.force_apic_physical_destination_mode = fadt->force_apic_physical_destination_mode;
 615 #endif
 616
 617 #ifdef CONFIG_X86_PM_TIMER
 618         /* detect the location of the ACPI PM Timer */
 619         if (fadt->revision >= FADT2_REVISION_ID) {
 620                 /* FADT rev. 2 */
 621                 if (fadt->xpm_tmr_blk.address_space_id != ACPI_ADR_SPACE_SYSTEM_IO)
 622                         return 0;
 623
 624                 pmtmr_ioport = fadt->xpm_tmr_blk.address;
 625         } else {
 626                 /* FADT rev. 1 */
 627                 pmtmr_ioport = fadt->V1_pm_tmr_blk;
 628         }
 629         if (pmtmr_ioport)
 630                 printk(KERN_INFO PREFIX "PM-Timer IO Port: %#x\n", pmtmr_ioport);
 631 #endif
 632         return 0;
 633 }
 634
 635
 636 unsigned long __init
 637 acpi_find_rsdp (void)
 638 {
 639         unsigned long           rsdp_phys = 0;
 640
 641         if (efi_enabled) {
 642                 if (efi.acpi20)
 643                         return __pa(efi.acpi20);
 644                 else if (efi.acpi)
 645                         return __pa(efi.acpi);
 646         }
 647         /*
 648          * Scan memory looking for the RSDP signature. First search EBDA (low
 649          * memory) paragraphs and then search upper memory (E0000-FFFFF).
 650          */
 651         rsdp_phys = acpi_scan_rsdp (0, 0x400);
 652         if (!rsdp_phys)
 653                 rsdp_phys = acpi_scan_rsdp (0xE0000, 0x20000);
 654
 655         return rsdp_phys;
 656 }
 657
 658 #ifdef  CONFIG_X86_LOCAL_APIC
 659 /*
 660  * Parse LAPIC entries in MADT
 661  * returns 0 on success, < 0 on error
 662  */
 663 static int __init
 664 acpi_parse_madt_lapic_entries(void)
 665 {
 666         int count;
 667
 668         /*
 669          * Note that the LAPIC address is obtained from the MADT (32-bit value)
 670          * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value).
 671          */
 672
 673         count = acpi_table_parse_madt(ACPI_MADT_LAPIC_ADDR_OVR, acpi_parse_lapic_addr_ovr, 0);
 674         if (count < 0) {
 675                 printk(KERN_ERR PREFIX "Error parsing LAPIC address override entry\n");
 676                 return count;
 677         }
 678
 679         mp_register_lapic_address(acpi_lapic_addr);
 680
 681         count = acpi_table_parse_madt(ACPI_MADT_LAPIC, acpi_parse_lapic,
 682                                        MAX_APICS);
 683         if (!count) {
 684                 printk(KERN_ERR PREFIX "No LAPIC entries present\n");
 685                 /* TBD: Cleanup to allow fallback to MPS */
 686                 return -ENODEV;
 687         }
 688         else if (count < 0) {
 689                 printk(KERN_ERR PREFIX "Error parsing LAPIC entry\n");
 690                 /* TBD: Cleanup to allow fallback to MPS */
 691                 return count;
 692         }
 693
 694         count = acpi_table_parse_madt(ACPI_MADT_LAPIC_NMI, acpi_parse_lapic_nmi, 0);
 695         if (count < 0) {
 696                 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n");
 697                 /* TBD: Cleanup to allow fallback to MPS */
 698                 return count;
 699         }
 700         return 0;
 701 }
 702 #endif /* CONFIG_X86_LOCAL_APIC */
 703
 704 #if defined(CONFIG_X86_IO_APIC) && defined(CONFIG_ACPI_INTERPRETER)
 705 /*
 706  * Parse IOAPIC related entries in MADT
 707  * returns 0 on success, < 0 on error
 708  */
 709 static int __init
 710 acpi_parse_madt_ioapic_entries(void)
 711 {
 712         int count;
 713
 714         /*
 715          * ACPI interpreter is required to complete interrupt setup,
 716          * so if it is off, don't enumerate the io-apics with ACPI.
 717          * If MPS is present, it will handle them,
 718          * otherwise the system will stay in PIC mode
 719          */
 720         if (acpi_disabled || acpi_noirq) {
 721                 return -ENODEV;
 722         }
 723
 724         /*
 725          * if "noapic" boot option, don't look for IO-APICs
 726          */
 727         if (skip_ioapic_setup) {
 728                 printk(KERN_INFO PREFIX "Skipping IOAPIC probe "
 729                         "due to 'noapic' option.\n");
 730                 return -ENODEV;
 731         }
 732
 733         count = acpi_table_parse_madt(ACPI_MADT_IOAPIC, acpi_parse_ioapic, MAX_IO_APICS);
 734         if (!count) {
 735                 printk(KERN_ERR PREFIX "No IOAPIC entries present\n");
 736                 return -ENODEV;
 737         }
 738         else if (count < 0) {
 739                 printk(KERN_ERR PREFIX "Error parsing IOAPIC entry\n");
 740                 return count;
 741         }
 742
 743         count = acpi_table_parse_madt(ACPI_MADT_INT_SRC_OVR, acpi_parse_int_src_ovr, NR_IRQ_VECTORS);
 744         if (count < 0) {
 745                 printk(KERN_ERR PREFIX "Error parsing interrupt source overrides entry\n");
 746                 /* TBD: Cleanup to allow fallback to MPS */
 747                 return count;
 748         }
 749
 750         /*
 751          * If BIOS did not supply an INT_SRC_OVR for the SCI
 752          * pretend we got one so we can set the SCI flags.
 753          */
 754         if (!acpi_sci_override_gsi)
 755                 acpi_sci_ioapic_setup(acpi_fadt.sci_int, 0, 0);
 756
 757         /* Fill in identity legacy mapings where no override */
 758         mp_config_acpi_legacy_irqs();
 759
 760         count = acpi_table_parse_madt(ACPI_MADT_NMI_SRC, acpi_parse_nmi_src, NR_IRQ_VECTORS);
 761         if (count < 0) {
 762                 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n");
 763                 /* TBD: Cleanup to allow fallback to MPS */
 764                 return count;
 765         }
 766
 767         return 0;
 768 }
 769 #else
 770 static inline int acpi_parse_madt_ioapic_entries(void)
 771 {
 772         return -1;
 773 }
 774 #endif /* !(CONFIG_X86_IO_APIC && CONFIG_ACPI_INTERPRETER) */
 775
 776
 777 static void __init
 778 acpi_process_madt(void)
 779 {
 780 #ifdef CONFIG_X86_LOCAL_APIC
 781         int count, error;
 782
 783         count = acpi_table_parse(ACPI_APIC, acpi_parse_madt);
 784         if (count >= 1) {
 785
 786                 /*
 787                  * Parse MADT LAPIC entries
 788                  */
 789                 error = acpi_parse_madt_lapic_entries();
 790                 if (!error) {
 791                         acpi_lapic = 1;
 792
 793                         /*
 794                          * Parse MADT IO-APIC entries
 795                          */
 796                         error = acpi_parse_madt_ioapic_entries();
 797                         if (!error) {
 798                                 acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC;
 799                                 acpi_irq_balance_set(NULL);
 800                                 acpi_ioapic = 1;
 801
 802                                 smp_found_config = 1;
 803                                 clustered_apic_check();
 804                         }
 805                 }
 806                 if (error == -EINVAL) {
 807                         /*
 808                          * Dell Precision Workstation 410, 610 come here.
 809                          */
 810                         printk(KERN_ERR PREFIX "Invalid BIOS MADT, disabling ACPI\n");
 811                         disable_acpi();
 812                 }
 813         }
 814 #endif
 815         return;
 816 }
 817
 818 /*
 819  * acpi_boot_table_init() and acpi_boot_init()
 820  *  called from setup_arch(), always.
 821  *      1. checksums all tables
 822  *      2. enumerates lapics
 823  *      3. enumerates io-apics
 824  *
 825  * acpi_table_init() is separate to allow reading SRAT without
 826  * other side effects.
 827  *
 828  * side effects of acpi_boot_init:
 829  *      acpi_lapic = 1 if LAPIC found
 830  *      acpi_ioapic = 1 if IOAPIC found
 831  *      if (acpi_lapic && acpi_ioapic) smp_found_config = 1;
 832  *      if acpi_blacklisted() acpi_disabled = 1;
 833  *      acpi_irq_model=...
 834  *      ...
 835  *
 836  * return value: (currently ignored)
 837  *      0: success
 838  *      !0: failure
 839  */
 840
 841 int __init
 842 acpi_boot_table_init(void)
 843 {
 844         int error;
 845
 846         /*
 847          * If acpi_disabled, bail out
 848          * One exception: acpi=ht continues far enough to enumerate LAPICs
 849          */
 850         if (acpi_disabled && !acpi_ht)
 851                  return 1;
 852
 853         /*
 854          * Initialize the ACPI boot-time table parser.
 855          */
 856         error = acpi_table_init();
 857         if (error) {
 858                 disable_acpi();
 859                 return error;
 860         }
 861
 862 #ifdef __i386__
 863         check_acpi_pci();
 864 #endif
 865
 866         acpi_table_parse(ACPI_BOOT, acpi_parse_sbf);
 867
 868         /*
 869          * blacklist may disable ACPI entirely
 870          */
 871         error = acpi_blacklisted();
 872         if (error) {
 873                 extern int acpi_force;
 874
 875                 if (acpi_force) {
 876                         printk(KERN_WARNING PREFIX "acpi=force override\n");
 877                 } else {
 878                         printk(KERN_WARNING PREFIX "Disabling ACPI support\n");
 879                         disable_acpi();
 880                         return error;
 881                 }
 882         }
 883
 884         return 0;
 885 }
 886
 887
 888 int __init acpi_boot_init(void)
 889 {
 890         /*
 891          * If acpi_disabled, bail out
 892          * One exception: acpi=ht continues far enough to enumerate LAPICs
 893          */
 894         if (acpi_disabled && !acpi_ht)
 895                  return 1;
 896
 897         acpi_table_parse(ACPI_BOOT, acpi_parse_sbf);
 898
 899         /*
 900          * set sci_int and PM timer address
 901          */
 902         acpi_table_parse(ACPI_FADT, acpi_parse_fadt);
 903
 904         /*
 905          * Process the Multiple APIC Description Table (MADT), if present
 906          */
 907         acpi_process_madt();
 908
 909         acpi_table_parse(ACPI_HPET, acpi_parse_hpet);
 910         acpi_table_parse(ACPI_MCFG, acpi_parse_mcfg);
 911
 912         return 0;
 913 }
 914