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/module.h>
  31 #include <linux/dmi.h>
  32 #include <linux/irq.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/mpspec.h>
  39
  40 #ifdef  CONFIG_X86_64
  41
  42 extern void __init clustered_apic_check(void);
  43
  44 extern int gsi_irq_sharing(int gsi);
  45 #include <asm/proto.h>
  46
  47 static inline int acpi_madt_oem_check(char *oem_id, char *oem_table_id) { return 0; }
  48
  49
  50 #else                           /* X86 */
  51
  52 #ifdef  CONFIG_X86_LOCAL_APIC
  53 #include <mach_apic.h>
  54 #include <mach_mpparse.h>
  55 #endif                          /* CONFIG_X86_LOCAL_APIC */
  56
  57 static inline int gsi_irq_sharing(int gsi) { return gsi; }
  58
  59 #endif                          /* X86 */
  60
  61 #define BAD_MADT_ENTRY(entry, end) (                                        \
  62                 (!entry) || (unsigned long)entry + sizeof(*entry) > end ||  \
  63                 ((acpi_table_entry_header *)entry)->length != sizeof(*entry))
  64
  65 #define PREFIX                  "ACPI: "
  66
  67 int acpi_noirq __initdata;      /* skip ACPI IRQ initialization */
  68 int acpi_pci_disabled __initdata;       /* skip ACPI PCI scan and IRQ initialization */
  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 /* The physical address of the MMCONFIG aperture.  Set from ACPI tables. */
 162 struct acpi_table_mcfg_config *pci_mmcfg_config;
 163 int pci_mmcfg_config_num;
 164
 165 int __init acpi_parse_mcfg(unsigned long phys_addr, unsigned long size)
 166 {
 167         struct acpi_table_mcfg *mcfg;
 168         unsigned long i;
 169         int config_size;
 170
 171         if (!phys_addr || !size)
 172                 return -EINVAL;
 173
 174         mcfg = (struct acpi_table_mcfg *)__acpi_map_table(phys_addr, size);
 175         if (!mcfg) {
 176                 printk(KERN_WARNING PREFIX "Unable to map MCFG\n");
 177                 return -ENODEV;
 178         }
 179
 180         /* how many config structures do we have */
 181         pci_mmcfg_config_num = 0;
 182         i = size - sizeof(struct acpi_table_mcfg);
 183         while (i >= sizeof(struct acpi_table_mcfg_config)) {
 184                 ++pci_mmcfg_config_num;
 185                 i -= sizeof(struct acpi_table_mcfg_config);
 186         };
 187         if (pci_mmcfg_config_num == 0) {
 188                 printk(KERN_ERR PREFIX "MMCONFIG has no entries\n");
 189                 return -ENODEV;
 190         }
 191
 192         config_size = pci_mmcfg_config_num * sizeof(*pci_mmcfg_config);
 193         pci_mmcfg_config = kmalloc(config_size, GFP_KERNEL);
 194         if (!pci_mmcfg_config) {
 195                 printk(KERN_WARNING PREFIX
 196                        "No memory for MCFG config tables\n");
 197                 return -ENOMEM;
 198         }
 199
 200         memcpy(pci_mmcfg_config, &mcfg->config, config_size);
 201         for (i = 0; i < pci_mmcfg_config_num; ++i) {
 202                 if (mcfg->config[i].base_reserved) {
 203                         printk(KERN_ERR PREFIX
 204                                "MMCONFIG not in low 4GB of memory\n");
 205                         return -ENODEV;
 206                 }
 207         }
 208
 209         return 0;
 210 }
 211 #endif                          /* CONFIG_PCI_MMCONFIG */
 212
 213 #ifdef CONFIG_X86_LOCAL_APIC
 214 static int __init acpi_parse_madt(unsigned long phys_addr, unsigned long size)
 215 {
 216         struct acpi_table_madt *madt = NULL;
 217
 218         if (!phys_addr || !size)
 219                 return -EINVAL;
 220
 221         madt = (struct acpi_table_madt *)__acpi_map_table(phys_addr, size);
 222         if (!madt) {
 223                 printk(KERN_WARNING PREFIX "Unable to map MADT\n");
 224                 return -ENODEV;
 225         }
 226
 227         if (madt->lapic_address) {
 228                 acpi_lapic_addr = (u64) madt->lapic_address;
 229
 230                 printk(KERN_DEBUG PREFIX "Local APIC address 0x%08x\n",
 231                        madt->lapic_address);
 232         }
 233
 234         acpi_madt_oem_check(madt->header.oem_id, madt->header.oem_table_id);
 235
 236         return 0;
 237 }
 238
 239 static int __init
 240 acpi_parse_lapic(acpi_table_entry_header * header, const unsigned long end)
 241 {
 242         struct acpi_table_lapic *processor = NULL;
 243
 244         processor = (struct acpi_table_lapic *)header;
 245
 246         if (BAD_MADT_ENTRY(processor, end))
 247                 return -EINVAL;
 248
 249         acpi_table_print_madt_entry(header);
 250
 251         /* Register even disabled CPUs for cpu hotplug */
 252
 253         x86_acpiid_to_apicid[processor->acpi_id] = processor->id;
 254
 255         mp_register_lapic(processor->id,        /* APIC ID */
 256                           processor->flags.enabled);    /* Enabled? */
 257
 258         return 0;
 259 }
 260
 261 static int __init
 262 acpi_parse_lapic_addr_ovr(acpi_table_entry_header * header,
 263                           const unsigned long end)
 264 {
 265         struct acpi_table_lapic_addr_ovr *lapic_addr_ovr = NULL;
 266
 267         lapic_addr_ovr = (struct acpi_table_lapic_addr_ovr *)header;
 268
 269         if (BAD_MADT_ENTRY(lapic_addr_ovr, end))
 270                 return -EINVAL;
 271
 272         acpi_lapic_addr = lapic_addr_ovr->address;
 273
 274         return 0;
 275 }
 276
 277 static int __init
 278 acpi_parse_lapic_nmi(acpi_table_entry_header * header, const unsigned long end)
 279 {
 280         struct acpi_table_lapic_nmi *lapic_nmi = NULL;
 281
 282         lapic_nmi = (struct acpi_table_lapic_nmi *)header;
 283
 284         if (BAD_MADT_ENTRY(lapic_nmi, end))
 285                 return -EINVAL;
 286
 287         acpi_table_print_madt_entry(header);
 288
 289         if (lapic_nmi->lint != 1)
 290                 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n");
 291
 292         return 0;
 293 }
 294
 295 #endif                          /*CONFIG_X86_LOCAL_APIC */
 296
 297 #ifdef CONFIG_X86_IO_APIC
 298
 299 static int __init
 300 acpi_parse_ioapic(acpi_table_entry_header * header, const unsigned long end)
 301 {
 302         struct acpi_table_ioapic *ioapic = NULL;
 303
 304         ioapic = (struct acpi_table_ioapic *)header;
 305
 306         if (BAD_MADT_ENTRY(ioapic, end))
 307                 return -EINVAL;
 308
 309         acpi_table_print_madt_entry(header);
 310
 311         mp_register_ioapic(ioapic->id,
 312                            ioapic->address, ioapic->global_irq_base);
 313
 314         return 0;
 315 }
 316
 317 /*
 318  * Parse Interrupt Source Override for the ACPI SCI
 319  */
 320 static void acpi_sci_ioapic_setup(u32 gsi, u16 polarity, u16 trigger)
 321 {
 322         if (trigger == 0)       /* compatible SCI trigger is level */
 323                 trigger = 3;
 324
 325         if (polarity == 0)      /* compatible SCI polarity is low */
 326                 polarity = 3;
 327
 328         /* Command-line over-ride via acpi_sci= */
 329         if (acpi_sci_flags.trigger)
 330                 trigger = acpi_sci_flags.trigger;
 331
 332         if (acpi_sci_flags.polarity)
 333                 polarity = acpi_sci_flags.polarity;
 334
 335         /*
 336          * mp_config_acpi_legacy_irqs() already setup IRQs < 16
 337          * If GSI is < 16, this will update its flags,
 338          * else it will create a new mp_irqs[] entry.
 339          */
 340         mp_override_legacy_irq(gsi, polarity, trigger, gsi);
 341
 342         /*
 343          * stash over-ride to indicate we've been here
 344          * and for later update of acpi_fadt
 345          */
 346         acpi_sci_override_gsi = gsi;
 347         return;
 348 }
 349
 350 static int __init
 351 acpi_parse_int_src_ovr(acpi_table_entry_header * header,
 352                        const unsigned long end)
 353 {
 354         struct acpi_table_int_src_ovr *intsrc = NULL;
 355
 356         intsrc = (struct acpi_table_int_src_ovr *)header;
 357
 358         if (BAD_MADT_ENTRY(intsrc, end))
 359                 return -EINVAL;
 360
 361         acpi_table_print_madt_entry(header);
 362
 363         if (intsrc->bus_irq == acpi_fadt.sci_int) {
 364                 acpi_sci_ioapic_setup(intsrc->global_irq,
 365                                       intsrc->flags.polarity,
 366                                       intsrc->flags.trigger);
 367                 return 0;
 368         }
 369
 370         if (acpi_skip_timer_override &&
 371             intsrc->bus_irq == 0 && intsrc->global_irq == 2) {
 372                 printk(PREFIX "BIOS IRQ0 pin2 override ignored.\n");
 373                 return 0;
 374         }
 375
 376         mp_override_legacy_irq(intsrc->bus_irq,
 377                                intsrc->flags.polarity,
 378                                intsrc->flags.trigger, intsrc->global_irq);
 379
 380         return 0;
 381 }
 382
 383 static int __init
 384 acpi_parse_nmi_src(acpi_table_entry_header * header, const unsigned long end)
 385 {
 386         struct acpi_table_nmi_src *nmi_src = NULL;
 387
 388         nmi_src = (struct acpi_table_nmi_src *)header;
 389
 390         if (BAD_MADT_ENTRY(nmi_src, end))
 391                 return -EINVAL;
 392
 393         acpi_table_print_madt_entry(header);
 394
 395         /* TBD: Support nimsrc entries? */
 396
 397         return 0;
 398 }
 399
 400 #endif                          /* CONFIG_X86_IO_APIC */
 401
 402 /*
 403  * acpi_pic_sci_set_trigger()
 404  *
 405  * use ELCR to set PIC-mode trigger type for SCI
 406  *
 407  * If a PIC-mode SCI is not recognized or gives spurious IRQ7's
 408  * it may require Edge Trigger -- use "acpi_sci=edge"
 409  *
 410  * Port 0x4d0-4d1 are ECLR1 and ECLR2, the Edge/Level Control Registers
 411  * for the 8259 PIC.  bit[n] = 1 means irq[n] is Level, otherwise Edge.
 412  * ECLR1 is IRQ's 0-7 (IRQ 0, 1, 2 must be 0)
 413  * ECLR2 is IRQ's 8-15 (IRQ 8, 13 must be 0)
 414  */
 415
 416 void __init acpi_pic_sci_set_trigger(unsigned int irq, u16 trigger)
 417 {
 418         unsigned int mask = 1 << irq;
 419         unsigned int old, new;
 420
 421         /* Real old ELCR mask */
 422         old = inb(0x4d0) | (inb(0x4d1) << 8);
 423
 424         /*
 425          * If we use ACPI to set PCI irq's, then we should clear ELCR
 426          * since we will set it correctly as we enable the PCI irq
 427          * routing.
 428          */
 429         new = acpi_noirq ? old : 0;
 430
 431         /*
 432          * Update SCI information in the ELCR, it isn't in the PCI
 433          * routing tables..
 434          */
 435         switch (trigger) {
 436         case 1:         /* Edge - clear */
 437                 new &= ~mask;
 438                 break;
 439         case 3:         /* Level - set */
 440                 new |= mask;
 441                 break;
 442         }
 443
 444         if (old == new)
 445                 return;
 446
 447         printk(PREFIX "setting ELCR to %04x (from %04x)\n", new, old);
 448         outb(new, 0x4d0);
 449         outb(new >> 8, 0x4d1);
 450 }
 451
 452 int acpi_gsi_to_irq(u32 gsi, unsigned int *irq)
 453 {
 454 #ifdef CONFIG_X86_IO_APIC
 455         if (use_pci_vector() && !platform_legacy_irq(gsi))
 456                 *irq = IO_APIC_VECTOR(gsi);
 457         else
 458 #endif
 459                 *irq = gsi_irq_sharing(gsi);
 460         return 0;
 461 }
 462
 463 /*
 464  * success: return IRQ number (>=0)
 465  * failure: return < 0
 466  */
 467 int acpi_register_gsi(u32 gsi, int triggering, int polarity)
 468 {
 469         unsigned int irq;
 470         unsigned int plat_gsi = gsi;
 471
 472 #ifdef CONFIG_PCI
 473         /*
 474          * Make sure all (legacy) PCI IRQs are set as level-triggered.
 475          */
 476         if (acpi_irq_model == ACPI_IRQ_MODEL_PIC) {
 477                 extern void eisa_set_level_irq(unsigned int irq);
 478
 479                 if (triggering == ACPI_LEVEL_SENSITIVE)
 480                         eisa_set_level_irq(gsi);
 481         }
 482 #endif
 483
 484 #ifdef CONFIG_X86_IO_APIC
 485         if (acpi_irq_model == ACPI_IRQ_MODEL_IOAPIC) {
 486                 plat_gsi = mp_register_gsi(gsi, triggering, polarity);
 487         }
 488 #endif
 489         acpi_gsi_to_irq(plat_gsi, &irq);
 490         return irq;
 491 }
 492
 493 EXPORT_SYMBOL(acpi_register_gsi);
 494
 495 /*
 496  *  ACPI based hotplug support for CPU
 497  */
 498 #ifdef CONFIG_ACPI_HOTPLUG_CPU
 499 int acpi_map_lsapic(acpi_handle handle, int *pcpu)
 500 {
 501         /* TBD */
 502         return -EINVAL;
 503 }
 504
 505 EXPORT_SYMBOL(acpi_map_lsapic);
 506
 507 int acpi_unmap_lsapic(int cpu)
 508 {
 509         /* TBD */
 510         return -EINVAL;
 511 }
 512
 513 EXPORT_SYMBOL(acpi_unmap_lsapic);
 514 #endif                          /* CONFIG_ACPI_HOTPLUG_CPU */
 515
 516 int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base)
 517 {
 518         /* TBD */
 519         return -EINVAL;
 520 }
 521
 522 EXPORT_SYMBOL(acpi_register_ioapic);
 523
 524 int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base)
 525 {
 526         /* TBD */
 527         return -EINVAL;
 528 }
 529
 530 EXPORT_SYMBOL(acpi_unregister_ioapic);
 531
 532 static unsigned long __init
 533 acpi_scan_rsdp(unsigned long start, unsigned long length)
 534 {
 535         unsigned long offset = 0;
 536         unsigned long sig_len = sizeof("RSD PTR ") - 1;
 537
 538         /*
 539          * Scan all 16-byte boundaries of the physical memory region for the
 540          * RSDP signature.
 541          */
 542         for (offset = 0; offset < length; offset += 16) {
 543                 if (strncmp((char *)(phys_to_virt(start) + offset), "RSD PTR ", sig_len))
 544                         continue;
 545                 return (start + offset);
 546         }
 547
 548         return 0;
 549 }
 550
 551 static int __init acpi_parse_sbf(unsigned long phys_addr, unsigned long size)
 552 {
 553         struct acpi_table_sbf *sb;
 554
 555         if (!phys_addr || !size)
 556                 return -EINVAL;
 557
 558         sb = (struct acpi_table_sbf *)__acpi_map_table(phys_addr, size);
 559         if (!sb) {
 560                 printk(KERN_WARNING PREFIX "Unable to map SBF\n");
 561                 return -ENODEV;
 562         }
 563
 564         sbf_port = sb->sbf_cmos;        /* Save CMOS port */
 565
 566         return 0;
 567 }
 568
 569 #ifdef CONFIG_HPET_TIMER
 570
 571 static int __init acpi_parse_hpet(unsigned long phys, unsigned long size)
 572 {
 573         struct acpi_table_hpet *hpet_tbl;
 574
 575         if (!phys || !size)
 576                 return -EINVAL;
 577
 578         hpet_tbl = (struct acpi_table_hpet *)__acpi_map_table(phys, size);
 579         if (!hpet_tbl) {
 580                 printk(KERN_WARNING PREFIX "Unable to map HPET\n");
 581                 return -ENODEV;
 582         }
 583
 584         if (hpet_tbl->addr.space_id != ACPI_SPACE_MEM) {
 585                 printk(KERN_WARNING PREFIX "HPET timers must be located in "
 586                        "memory.\n");
 587                 return -1;
 588         }
 589 #ifdef  CONFIG_X86_64
 590         vxtime.hpet_address = hpet_tbl->addr.addrl |
 591             ((long)hpet_tbl->addr.addrh << 32);
 592
 593         printk(KERN_INFO PREFIX "HPET id: %#x base: %#lx\n",
 594                hpet_tbl->id, vxtime.hpet_address);
 595 #else                           /* X86 */
 596         {
 597                 extern unsigned long hpet_address;
 598
 599                 hpet_address = hpet_tbl->addr.addrl;
 600                 printk(KERN_INFO PREFIX "HPET id: %#x base: %#lx\n",
 601                        hpet_tbl->id, hpet_address);
 602         }
 603 #endif                          /* X86 */
 604
 605         return 0;
 606 }
 607 #else
 608 #define acpi_parse_hpet NULL
 609 #endif
 610
 611 #ifdef CONFIG_X86_PM_TIMER
 612 extern u32 pmtmr_ioport;
 613 #endif
 614
 615 static int __init acpi_parse_fadt(unsigned long phys, unsigned long size)
 616 {
 617         struct fadt_descriptor_rev2 *fadt = NULL;
 618
 619         fadt = (struct fadt_descriptor_rev2 *)__acpi_map_table(phys, size);
 620         if (!fadt) {
 621                 printk(KERN_WARNING PREFIX "Unable to map FADT\n");
 622                 return 0;
 623         }
 624         /* initialize sci_int early for INT_SRC_OVR MADT parsing */
 625         acpi_fadt.sci_int = fadt->sci_int;
 626
 627         /* initialize rev and apic_phys_dest_mode for x86_64 genapic */
 628         acpi_fadt.revision = fadt->revision;
 629         acpi_fadt.force_apic_physical_destination_mode =
 630             fadt->force_apic_physical_destination_mode;
 631
 632 #ifdef CONFIG_X86_PM_TIMER
 633         /* detect the location of the ACPI PM Timer */
 634         if (fadt->revision >= FADT2_REVISION_ID) {
 635                 /* FADT rev. 2 */
 636                 if (fadt->xpm_tmr_blk.address_space_id !=
 637                     ACPI_ADR_SPACE_SYSTEM_IO)
 638                         return 0;
 639
 640                 pmtmr_ioport = fadt->xpm_tmr_blk.address;
 641                 /*
 642                  * "X" fields are optional extensions to the original V1.0
 643                  * fields, so we must selectively expand V1.0 fields if the
 644                  * corresponding X field is zero.
 645                  */
 646                 if (!pmtmr_ioport)
 647                         pmtmr_ioport = fadt->V1_pm_tmr_blk;
 648         } else {
 649                 /* FADT rev. 1 */
 650                 pmtmr_ioport = fadt->V1_pm_tmr_blk;
 651         }
 652         if (pmtmr_ioport)
 653                 printk(KERN_INFO PREFIX "PM-Timer IO Port: %#x\n",
 654                        pmtmr_ioport);
 655 #endif
 656         return 0;
 657 }
 658
 659 unsigned long __init acpi_find_rsdp(void)
 660 {
 661         unsigned long rsdp_phys = 0;
 662
 663         if (efi_enabled) {
 664                 if (efi.acpi20)
 665                         return __pa(efi.acpi20);
 666                 else if (efi.acpi)
 667                         return __pa(efi.acpi);
 668         }
 669         /*
 670          * Scan memory looking for the RSDP signature. First search EBDA (low
 671          * memory) paragraphs and then search upper memory (E0000-FFFFF).
 672          */
 673         rsdp_phys = acpi_scan_rsdp(0, 0x400);
 674         if (!rsdp_phys)
 675                 rsdp_phys = acpi_scan_rsdp(0xE0000, 0x20000);
 676
 677         return rsdp_phys;
 678 }
 679
 680 #ifdef  CONFIG_X86_LOCAL_APIC
 681 /*
 682  * Parse LAPIC entries in MADT
 683  * returns 0 on success, < 0 on error
 684  */
 685 static int __init acpi_parse_madt_lapic_entries(void)
 686 {
 687         int count;
 688
 689         /*
 690          * Note that the LAPIC address is obtained from the MADT (32-bit value)
 691          * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value).
 692          */
 693
 694         count =
 695             acpi_table_parse_madt(ACPI_MADT_LAPIC_ADDR_OVR,
 696                                   acpi_parse_lapic_addr_ovr, 0);
 697         if (count < 0) {
 698                 printk(KERN_ERR PREFIX
 699                        "Error parsing LAPIC address override entry\n");
 700                 return count;
 701         }
 702
 703         mp_register_lapic_address(acpi_lapic_addr);
 704
 705         count = acpi_table_parse_madt(ACPI_MADT_LAPIC, acpi_parse_lapic,
 706                                       MAX_APICS);
 707         if (!count) {
 708                 printk(KERN_ERR PREFIX "No LAPIC entries present\n");
 709                 /* TBD: Cleanup to allow fallback to MPS */
 710                 return -ENODEV;
 711         } else if (count < 0) {
 712                 printk(KERN_ERR PREFIX "Error parsing LAPIC entry\n");
 713                 /* TBD: Cleanup to allow fallback to MPS */
 714                 return count;
 715         }
 716
 717         count =
 718             acpi_table_parse_madt(ACPI_MADT_LAPIC_NMI, acpi_parse_lapic_nmi, 0);
 719         if (count < 0) {
 720                 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n");
 721                 /* TBD: Cleanup to allow fallback to MPS */
 722                 return count;
 723         }
 724         return 0;
 725 }
 726 #endif                          /* CONFIG_X86_LOCAL_APIC */
 727
 728 #ifdef  CONFIG_X86_IO_APIC
 729 /*
 730  * Parse IOAPIC related entries in MADT
 731  * returns 0 on success, < 0 on error
 732  */
 733 static int __init acpi_parse_madt_ioapic_entries(void)
 734 {
 735         int count;
 736
 737         /*
 738          * ACPI interpreter is required to complete interrupt setup,
 739          * so if it is off, don't enumerate the io-apics with ACPI.
 740          * If MPS is present, it will handle them,
 741          * otherwise the system will stay in PIC mode
 742          */
 743         if (acpi_disabled || acpi_noirq) {
 744                 return -ENODEV;
 745         }
 746
 747         /*
 748          * if "noapic" boot option, don't look for IO-APICs
 749          */
 750         if (skip_ioapic_setup) {
 751                 printk(KERN_INFO PREFIX "Skipping IOAPIC probe "
 752                        "due to 'noapic' option.\n");
 753                 return -ENODEV;
 754         }
 755
 756         count =
 757             acpi_table_parse_madt(ACPI_MADT_IOAPIC, acpi_parse_ioapic,
 758                                   MAX_IO_APICS);
 759         if (!count) {
 760                 printk(KERN_ERR PREFIX "No IOAPIC entries present\n");
 761                 return -ENODEV;
 762         } else if (count < 0) {
 763                 printk(KERN_ERR PREFIX "Error parsing IOAPIC entry\n");
 764                 return count;
 765         }
 766
 767         count =
 768             acpi_table_parse_madt(ACPI_MADT_INT_SRC_OVR, acpi_parse_int_src_ovr,
 769                                   NR_IRQ_VECTORS);
 770         if (count < 0) {
 771                 printk(KERN_ERR PREFIX
 772                        "Error parsing interrupt source overrides entry\n");
 773                 /* TBD: Cleanup to allow fallback to MPS */
 774                 return count;
 775         }
 776
 777         /*
 778          * If BIOS did not supply an INT_SRC_OVR for the SCI
 779          * pretend we got one so we can set the SCI flags.
 780          */
 781         if (!acpi_sci_override_gsi)
 782                 acpi_sci_ioapic_setup(acpi_fadt.sci_int, 0, 0);
 783
 784         /* Fill in identity legacy mapings where no override */
 785         mp_config_acpi_legacy_irqs();
 786
 787         count =
 788             acpi_table_parse_madt(ACPI_MADT_NMI_SRC, acpi_parse_nmi_src,
 789                                   NR_IRQ_VECTORS);
 790         if (count < 0) {
 791                 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n");
 792                 /* TBD: Cleanup to allow fallback to MPS */
 793                 return count;
 794         }
 795
 796         return 0;
 797 }
 798 #else
 799 static inline int acpi_parse_madt_ioapic_entries(void)
 800 {
 801         return -1;
 802 }
 803 #endif  /* !CONFIG_X86_IO_APIC */
 804
 805 static void __init acpi_process_madt(void)
 806 {
 807 #ifdef CONFIG_X86_LOCAL_APIC
 808         int count, error;
 809
 810         count = acpi_table_parse(ACPI_APIC, acpi_parse_madt);
 811         if (count >= 1) {
 812
 813                 /*
 814                  * Parse MADT LAPIC entries
 815                  */
 816                 error = acpi_parse_madt_lapic_entries();
 817                 if (!error) {
 818                         acpi_lapic = 1;
 819
 820 #ifdef CONFIG_X86_GENERICARCH
 821                         generic_bigsmp_probe();
 822 #endif
 823                         /*
 824                          * Parse MADT IO-APIC entries
 825                          */
 826                         error = acpi_parse_madt_ioapic_entries();
 827                         if (!error) {
 828                                 acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC;
 829                                 acpi_irq_balance_set(NULL);
 830                                 acpi_ioapic = 1;
 831
 832                                 smp_found_config = 1;
 833                                 clustered_apic_check();
 834                         }
 835                 }
 836                 if (error == -EINVAL) {
 837                         /*
 838                          * Dell Precision Workstation 410, 610 come here.
 839                          */
 840                         printk(KERN_ERR PREFIX
 841                                "Invalid BIOS MADT, disabling ACPI\n");
 842                         disable_acpi();
 843                 }
 844         }
 845 #endif
 846         return;
 847 }
 848
 849 extern int acpi_force;
 850
 851 #ifdef __i386__
 852
 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
 873 static int __init dmi_disable_acpi(struct dmi_system_id *d)
 874 {
 875         if (!acpi_force) {
 876                 printk(KERN_NOTICE "%s detected: acpi off\n", d->ident);
 877                 disable_acpi();
 878         } else {
 879                 printk(KERN_NOTICE
 880                        "Warning: DMI blacklist says broken, but acpi forced\n");
 881         }
 882         return 0;
 883 }
 884
 885 /*
 886  * Limit ACPI to CPU enumeration for HT
 887  */
 888 static int __init force_acpi_ht(struct dmi_system_id *d)
 889 {
 890         if (!acpi_force) {
 891                 printk(KERN_NOTICE "%s detected: force use of acpi=ht\n",
 892                        d->ident);
 893                 disable_acpi();
 894                 acpi_ht = 1;
 895         } else {
 896                 printk(KERN_NOTICE
 897                        "Warning: acpi=force overrules DMI blacklist: acpi=ht\n");
 898         }
 899         return 0;
 900 }
 901
 902 /*
 903  * If your system is blacklisted here, but you find that acpi=force
 904  * works for you, please contact acpi-devel@sourceforge.net
 905  */
 906 static struct dmi_system_id __initdata acpi_dmi_table[] = {
 907         /*
 908          * Boxes that need ACPI disabled
 909          */
 910         {
 911          .callback = dmi_disable_acpi,
 912          .ident = "IBM Thinkpad",
 913          .matches = {
 914                      DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
 915                      DMI_MATCH(DMI_BOARD_NAME, "2629H1G"),
 916                      },
 917          },
 918
 919         /*
 920          * Boxes that need acpi=ht
 921          */
 922         {
 923          .callback = force_acpi_ht,
 924          .ident = "FSC Primergy T850",
 925          .matches = {
 926                      DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
 927                      DMI_MATCH(DMI_PRODUCT_NAME, "PRIMERGY T850"),
 928                      },
 929          },
 930         {
 931          .callback = force_acpi_ht,
 932          .ident = "DELL GX240",
 933          .matches = {
 934                      DMI_MATCH(DMI_BOARD_VENDOR, "Dell Computer Corporation"),
 935                      DMI_MATCH(DMI_BOARD_NAME, "OptiPlex GX240"),
 936                      },
 937          },
 938         {
 939          .callback = force_acpi_ht,
 940          .ident = "HP VISUALIZE NT Workstation",
 941          .matches = {
 942                      DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"),
 943                      DMI_MATCH(DMI_PRODUCT_NAME, "HP VISUALIZE NT Workstation"),
 944                      },
 945          },
 946         {
 947          .callback = force_acpi_ht,
 948          .ident = "Compaq Workstation W8000",
 949          .matches = {
 950                      DMI_MATCH(DMI_SYS_VENDOR, "Compaq"),
 951                      DMI_MATCH(DMI_PRODUCT_NAME, "Workstation W8000"),
 952                      },
 953          },
 954         {
 955          .callback = force_acpi_ht,
 956          .ident = "ASUS P4B266",
 957          .matches = {
 958                      DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
 959                      DMI_MATCH(DMI_BOARD_NAME, "P4B266"),
 960                      },
 961          },
 962         {
 963          .callback = force_acpi_ht,
 964          .ident = "ASUS P2B-DS",
 965          .matches = {
 966                      DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
 967                      DMI_MATCH(DMI_BOARD_NAME, "P2B-DS"),
 968                      },
 969          },
 970         {
 971          .callback = force_acpi_ht,
 972          .ident = "ASUS CUR-DLS",
 973          .matches = {
 974                      DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
 975                      DMI_MATCH(DMI_BOARD_NAME, "CUR-DLS"),
 976                      },
 977          },
 978         {
 979          .callback = force_acpi_ht,
 980          .ident = "ABIT i440BX-W83977",
 981          .matches = {
 982                      DMI_MATCH(DMI_BOARD_VENDOR, "ABIT <http://www.abit.com>"),
 983                      DMI_MATCH(DMI_BOARD_NAME, "i440BX-W83977 (BP6)"),
 984                      },
 985          },
 986         {
 987          .callback = force_acpi_ht,
 988          .ident = "IBM Bladecenter",
 989          .matches = {
 990                      DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
 991                      DMI_MATCH(DMI_BOARD_NAME, "IBM eServer BladeCenter HS20"),
 992                      },
 993          },
 994         {
 995          .callback = force_acpi_ht,
 996          .ident = "IBM eServer xSeries 360",
 997          .matches = {
 998                      DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
 999                      DMI_MATCH(DMI_BOARD_NAME, "eServer xSeries 360"),
1000                      },
1001          },
1002         {
1003          .callback = force_acpi_ht,
1004          .ident = "IBM eserver xSeries 330",
1005          .matches = {
1006                      DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1007                      DMI_MATCH(DMI_BOARD_NAME, "eserver xSeries 330"),
1008                      },
1009          },
1010         {
1011          .callback = force_acpi_ht,
1012          .ident = "IBM eserver xSeries 440",
1013          .matches = {
1014                      DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1015                      DMI_MATCH(DMI_PRODUCT_NAME, "eserver xSeries 440"),
1016                      },
1017          },
1018
1019         /*
1020          * Boxes that need ACPI PCI IRQ routing disabled
1021          */
1022         {
1023          .callback = disable_acpi_irq,
1024          .ident = "ASUS A7V",
1025          .matches = {
1026                      DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC"),
1027                      DMI_MATCH(DMI_BOARD_NAME, "<A7V>"),
1028                      /* newer BIOS, Revision 1011, does work */
1029                      DMI_MATCH(DMI_BIOS_VERSION,
1030                                "ASUS A7V ACPI BIOS Revision 1007"),
1031                      },
1032          },
1033
1034         /*
1035          * Boxes that need ACPI PCI IRQ routing and PCI scan disabled
1036          */
1037         {                       /* _BBN 0 bug */
1038          .callback = disable_acpi_pci,
1039          .ident = "ASUS PR-DLS",
1040          .matches = {
1041                      DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1042                      DMI_MATCH(DMI_BOARD_NAME, "PR-DLS"),
1043                      DMI_MATCH(DMI_BIOS_VERSION,
1044                                "ASUS PR-DLS ACPI BIOS Revision 1010"),
1045                      DMI_MATCH(DMI_BIOS_DATE, "03/21/2003")
1046                      },
1047          },
1048         {
1049          .callback = disable_acpi_pci,
1050          .ident = "Acer TravelMate 36x Laptop",
1051          .matches = {
1052                      DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
1053                      DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"),
1054                      },
1055          },
1056         {}
1057 };
1058
1059 #endif                          /* __i386__ */
1060
1061 /*
1062  * acpi_boot_table_init() and acpi_boot_init()
1063  *  called from setup_arch(), always.
1064  *      1. checksums all tables
1065  *      2. enumerates lapics
1066  *      3. enumerates io-apics
1067  *
1068  * acpi_table_init() is separate to allow reading SRAT without
1069  * other side effects.
1070  *
1071  * side effects of acpi_boot_init:
1072  *      acpi_lapic = 1 if LAPIC found
1073  *      acpi_ioapic = 1 if IOAPIC found
1074  *      if (acpi_lapic && acpi_ioapic) smp_found_config = 1;
1075  *      if acpi_blacklisted() acpi_disabled = 1;
1076  *      acpi_irq_model=...
1077  *      ...
1078  *
1079  * return value: (currently ignored)
1080  *      0: success
1081  *      !0: failure
1082  */
1083
1084 int __init acpi_boot_table_init(void)
1085 {
1086         int error;
1087
1088 #ifdef __i386__
1089         dmi_check_system(acpi_dmi_table);
1090 #endif
1091
1092         /*
1093          * If acpi_disabled, bail out
1094          * One exception: acpi=ht continues far enough to enumerate LAPICs
1095          */
1096         if (acpi_disabled && !acpi_ht)
1097                 return 1;
1098
1099         /*
1100          * Initialize the ACPI boot-time table parser.
1101          */
1102         error = acpi_table_init();
1103         if (error) {
1104                 disable_acpi();
1105                 return error;
1106         }
1107 #ifdef __i386__
1108         check_acpi_pci();
1109 #endif
1110
1111         acpi_table_parse(ACPI_BOOT, acpi_parse_sbf);
1112
1113         /*
1114          * blacklist may disable ACPI entirely
1115          */
1116         error = acpi_blacklisted();
1117         if (error) {
1118                 if (acpi_force) {
1119                         printk(KERN_WARNING PREFIX "acpi=force override\n");
1120                 } else {
1121                         printk(KERN_WARNING PREFIX "Disabling ACPI support\n");
1122                         disable_acpi();
1123                         return error;
1124                 }
1125         }
1126
1127         return 0;
1128 }
1129
1130 int __init acpi_boot_init(void)
1131 {
1132         /*
1133          * If acpi_disabled, bail out
1134          * One exception: acpi=ht continues far enough to enumerate LAPICs
1135          */
1136         if (acpi_disabled && !acpi_ht)
1137                 return 1;
1138
1139         acpi_table_parse(ACPI_BOOT, acpi_parse_sbf);
1140
1141         /*
1142          * set sci_int and PM timer address
1143          */
1144         acpi_table_parse(ACPI_FADT, acpi_parse_fadt);
1145
1146         /*
1147          * Process the Multiple APIC Description Table (MADT), if present
1148          */
1149         acpi_process_madt();
1150
1151         acpi_table_parse(ACPI_HPET, acpi_parse_hpet);
1152
1153         return 0;
1154 }