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+size <= (end_pfn_map << PAGE_SHIFT) + PAGE_SIZE)
 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         /* Record local apic id only when enabled */
 252         if (processor->flags.enabled)
 253                 x86_acpiid_to_apicid[processor->acpi_id] = processor->id;
 254
 255         /*
 256          * We need to register disabled CPU as well to permit
 257          * counting disabled CPUs. This allows us to size
 258          * cpus_possible_map more accurately, to permit
 259          * to not preallocating memory for all NR_CPUS
 260          * when we use CPU hotplug.
 261          */
 262         mp_register_lapic(processor->id,        /* APIC ID */
 263                           processor->flags.enabled);    /* Enabled? */
 264
 265         return 0;
 266 }
 267
 268 static int __init
 269 acpi_parse_lapic_addr_ovr(acpi_table_entry_header * header,
 270                           const unsigned long end)
 271 {
 272         struct acpi_table_lapic_addr_ovr *lapic_addr_ovr = NULL;
 273
 274         lapic_addr_ovr = (struct acpi_table_lapic_addr_ovr *)header;
 275
 276         if (BAD_MADT_ENTRY(lapic_addr_ovr, end))
 277                 return -EINVAL;
 278
 279         acpi_lapic_addr = lapic_addr_ovr->address;
 280
 281         return 0;
 282 }
 283
 284 static int __init
 285 acpi_parse_lapic_nmi(acpi_table_entry_header * header, const unsigned long end)
 286 {
 287         struct acpi_table_lapic_nmi *lapic_nmi = NULL;
 288
 289         lapic_nmi = (struct acpi_table_lapic_nmi *)header;
 290
 291         if (BAD_MADT_ENTRY(lapic_nmi, end))
 292                 return -EINVAL;
 293
 294         acpi_table_print_madt_entry(header);
 295
 296         if (lapic_nmi->lint != 1)
 297                 printk(KERN_WARNING PREFIX "NMI not connected to LINT 1!\n");
 298
 299         return 0;
 300 }
 301
 302 #endif                          /*CONFIG_X86_LOCAL_APIC */
 303
 304 #ifdef CONFIG_X86_IO_APIC
 305
 306 static int __init
 307 acpi_parse_ioapic(acpi_table_entry_header * header, const unsigned long end)
 308 {
 309         struct acpi_table_ioapic *ioapic = NULL;
 310
 311         ioapic = (struct acpi_table_ioapic *)header;
 312
 313         if (BAD_MADT_ENTRY(ioapic, end))
 314                 return -EINVAL;
 315
 316         acpi_table_print_madt_entry(header);
 317
 318         mp_register_ioapic(ioapic->id,
 319                            ioapic->address, ioapic->global_irq_base);
 320
 321         return 0;
 322 }
 323
 324 /*
 325  * Parse Interrupt Source Override for the ACPI SCI
 326  */
 327 static void acpi_sci_ioapic_setup(u32 gsi, u16 polarity, u16 trigger)
 328 {
 329         if (trigger == 0)       /* compatible SCI trigger is level */
 330                 trigger = 3;
 331
 332         if (polarity == 0)      /* compatible SCI polarity is low */
 333                 polarity = 3;
 334
 335         /* Command-line over-ride via acpi_sci= */
 336         if (acpi_sci_flags.trigger)
 337                 trigger = acpi_sci_flags.trigger;
 338
 339         if (acpi_sci_flags.polarity)
 340                 polarity = acpi_sci_flags.polarity;
 341
 342         /*
 343          * mp_config_acpi_legacy_irqs() already setup IRQs < 16
 344          * If GSI is < 16, this will update its flags,
 345          * else it will create a new mp_irqs[] entry.
 346          */
 347         mp_override_legacy_irq(gsi, polarity, trigger, gsi);
 348
 349         /*
 350          * stash over-ride to indicate we've been here
 351          * and for later update of acpi_fadt
 352          */
 353         acpi_sci_override_gsi = gsi;
 354         return;
 355 }
 356
 357 static int __init
 358 acpi_parse_int_src_ovr(acpi_table_entry_header * header,
 359                        const unsigned long end)
 360 {
 361         struct acpi_table_int_src_ovr *intsrc = NULL;
 362
 363         intsrc = (struct acpi_table_int_src_ovr *)header;
 364
 365         if (BAD_MADT_ENTRY(intsrc, end))
 366                 return -EINVAL;
 367
 368         acpi_table_print_madt_entry(header);
 369
 370         if (intsrc->bus_irq == acpi_fadt.sci_int) {
 371                 acpi_sci_ioapic_setup(intsrc->global_irq,
 372                                       intsrc->flags.polarity,
 373                                       intsrc->flags.trigger);
 374                 return 0;
 375         }
 376
 377         if (acpi_skip_timer_override &&
 378             intsrc->bus_irq == 0 && intsrc->global_irq == 2) {
 379                 printk(PREFIX "BIOS IRQ0 pin2 override ignored.\n");
 380                 return 0;
 381         }
 382
 383         mp_override_legacy_irq(intsrc->bus_irq,
 384                                intsrc->flags.polarity,
 385                                intsrc->flags.trigger, intsrc->global_irq);
 386
 387         return 0;
 388 }
 389
 390 static int __init
 391 acpi_parse_nmi_src(acpi_table_entry_header * header, const unsigned long end)
 392 {
 393         struct acpi_table_nmi_src *nmi_src = NULL;
 394
 395         nmi_src = (struct acpi_table_nmi_src *)header;
 396
 397         if (BAD_MADT_ENTRY(nmi_src, end))
 398                 return -EINVAL;
 399
 400         acpi_table_print_madt_entry(header);
 401
 402         /* TBD: Support nimsrc entries? */
 403
 404         return 0;
 405 }
 406
 407 #endif                          /* CONFIG_X86_IO_APIC */
 408
 409 /*
 410  * acpi_pic_sci_set_trigger()
 411  *
 412  * use ELCR to set PIC-mode trigger type for SCI
 413  *
 414  * If a PIC-mode SCI is not recognized or gives spurious IRQ7's
 415  * it may require Edge Trigger -- use "acpi_sci=edge"
 416  *
 417  * Port 0x4d0-4d1 are ECLR1 and ECLR2, the Edge/Level Control Registers
 418  * for the 8259 PIC.  bit[n] = 1 means irq[n] is Level, otherwise Edge.
 419  * ECLR1 is IRQ's 0-7 (IRQ 0, 1, 2 must be 0)
 420  * ECLR2 is IRQ's 8-15 (IRQ 8, 13 must be 0)
 421  */
 422
 423 void __init acpi_pic_sci_set_trigger(unsigned int irq, u16 trigger)
 424 {
 425         unsigned int mask = 1 << irq;
 426         unsigned int old, new;
 427
 428         /* Real old ELCR mask */
 429         old = inb(0x4d0) | (inb(0x4d1) << 8);
 430
 431         /*
 432          * If we use ACPI to set PCI irq's, then we should clear ELCR
 433          * since we will set it correctly as we enable the PCI irq
 434          * routing.
 435          */
 436         new = acpi_noirq ? old : 0;
 437
 438         /*
 439          * Update SCI information in the ELCR, it isn't in the PCI
 440          * routing tables..
 441          */
 442         switch (trigger) {
 443         case 1:         /* Edge - clear */
 444                 new &= ~mask;
 445                 break;
 446         case 3:         /* Level - set */
 447                 new |= mask;
 448                 break;
 449         }
 450
 451         if (old == new)
 452                 return;
 453
 454         printk(PREFIX "setting ELCR to %04x (from %04x)\n", new, old);
 455         outb(new, 0x4d0);
 456         outb(new >> 8, 0x4d1);
 457 }
 458
 459 int acpi_gsi_to_irq(u32 gsi, unsigned int *irq)
 460 {
 461 #ifdef CONFIG_X86_IO_APIC
 462         if (use_pci_vector() && !platform_legacy_irq(gsi))
 463                 *irq = IO_APIC_VECTOR(gsi);
 464         else
 465 #endif
 466                 *irq = gsi_irq_sharing(gsi);
 467         return 0;
 468 }
 469
 470 /*
 471  * success: return IRQ number (>=0)
 472  * failure: return < 0
 473  */
 474 int acpi_register_gsi(u32 gsi, int triggering, int polarity)
 475 {
 476         unsigned int irq;
 477         unsigned int plat_gsi = gsi;
 478
 479 #ifdef CONFIG_PCI
 480         /*
 481          * Make sure all (legacy) PCI IRQs are set as level-triggered.
 482          */
 483         if (acpi_irq_model == ACPI_IRQ_MODEL_PIC) {
 484                 extern void eisa_set_level_irq(unsigned int irq);
 485
 486                 if (triggering == ACPI_LEVEL_SENSITIVE)
 487                         eisa_set_level_irq(gsi);
 488         }
 489 #endif
 490
 491 #ifdef CONFIG_X86_IO_APIC
 492         if (acpi_irq_model == ACPI_IRQ_MODEL_IOAPIC) {
 493                 plat_gsi = mp_register_gsi(gsi, triggering, polarity);
 494         }
 495 #endif
 496         acpi_gsi_to_irq(plat_gsi, &irq);
 497         return irq;
 498 }
 499
 500 EXPORT_SYMBOL(acpi_register_gsi);
 501
 502 /*
 503  *  ACPI based hotplug support for CPU
 504  */
 505 #ifdef CONFIG_ACPI_HOTPLUG_CPU
 506 int acpi_map_lsapic(acpi_handle handle, int *pcpu)
 507 {
 508         /* TBD */
 509         return -EINVAL;
 510 }
 511
 512 EXPORT_SYMBOL(acpi_map_lsapic);
 513
 514 int acpi_unmap_lsapic(int cpu)
 515 {
 516         /* TBD */
 517         return -EINVAL;
 518 }
 519
 520 EXPORT_SYMBOL(acpi_unmap_lsapic);
 521 #endif                          /* CONFIG_ACPI_HOTPLUG_CPU */
 522
 523 int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base)
 524 {
 525         /* TBD */
 526         return -EINVAL;
 527 }
 528
 529 EXPORT_SYMBOL(acpi_register_ioapic);
 530
 531 int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base)
 532 {
 533         /* TBD */
 534         return -EINVAL;
 535 }
 536
 537 EXPORT_SYMBOL(acpi_unregister_ioapic);
 538
 539 static unsigned long __init
 540 acpi_scan_rsdp(unsigned long start, unsigned long length)
 541 {
 542         unsigned long offset = 0;
 543         unsigned long sig_len = sizeof("RSD PTR ") - 1;
 544
 545         /*
 546          * Scan all 16-byte boundaries of the physical memory region for the
 547          * RSDP signature.
 548          */
 549         for (offset = 0; offset < length; offset += 16) {
 550                 if (strncmp((char *)(phys_to_virt(start) + offset), "RSD PTR ", sig_len))
 551                         continue;
 552                 return (start + offset);
 553         }
 554
 555         return 0;
 556 }
 557
 558 static int __init acpi_parse_sbf(unsigned long phys_addr, unsigned long size)
 559 {
 560         struct acpi_table_sbf *sb;
 561
 562         if (!phys_addr || !size)
 563                 return -EINVAL;
 564
 565         sb = (struct acpi_table_sbf *)__acpi_map_table(phys_addr, size);
 566         if (!sb) {
 567                 printk(KERN_WARNING PREFIX "Unable to map SBF\n");
 568                 return -ENODEV;
 569         }
 570
 571         sbf_port = sb->sbf_cmos;        /* Save CMOS port */
 572
 573         return 0;
 574 }
 575
 576 #ifdef CONFIG_HPET_TIMER
 577
 578 static int __init acpi_parse_hpet(unsigned long phys, unsigned long size)
 579 {
 580         struct acpi_table_hpet *hpet_tbl;
 581
 582         if (!phys || !size)
 583                 return -EINVAL;
 584
 585         hpet_tbl = (struct acpi_table_hpet *)__acpi_map_table(phys, size);
 586         if (!hpet_tbl) {
 587                 printk(KERN_WARNING PREFIX "Unable to map HPET\n");
 588                 return -ENODEV;
 589         }
 590
 591         if (hpet_tbl->addr.space_id != ACPI_SPACE_MEM) {
 592                 printk(KERN_WARNING PREFIX "HPET timers must be located in "
 593                        "memory.\n");
 594                 return -1;
 595         }
 596 #ifdef  CONFIG_X86_64
 597         vxtime.hpet_address = hpet_tbl->addr.addrl |
 598             ((long)hpet_tbl->addr.addrh << 32);
 599
 600         printk(KERN_INFO PREFIX "HPET id: %#x base: %#lx\n",
 601                hpet_tbl->id, vxtime.hpet_address);
 602 #else                           /* X86 */
 603         {
 604                 extern unsigned long hpet_address;
 605
 606                 hpet_address = hpet_tbl->addr.addrl;
 607                 printk(KERN_INFO PREFIX "HPET id: %#x base: %#lx\n",
 608                        hpet_tbl->id, hpet_address);
 609         }
 610 #endif                          /* X86 */
 611
 612         return 0;
 613 }
 614 #else
 615 #define acpi_parse_hpet NULL
 616 #endif
 617
 618 #ifdef CONFIG_X86_PM_TIMER
 619 extern u32 pmtmr_ioport;
 620 #endif
 621
 622 static int __init acpi_parse_fadt(unsigned long phys, unsigned long size)
 623 {
 624         struct fadt_descriptor *fadt = NULL;
 625
 626         fadt = (struct fadt_descriptor *)__acpi_map_table(phys, size);
 627         if (!fadt) {
 628                 printk(KERN_WARNING PREFIX "Unable to map FADT\n");
 629                 return 0;
 630         }
 631         /* initialize sci_int early for INT_SRC_OVR MADT parsing */
 632         acpi_fadt.sci_int = fadt->sci_int;
 633
 634         /* initialize rev and apic_phys_dest_mode for x86_64 genapic */
 635         acpi_fadt.revision = fadt->revision;
 636         acpi_fadt.force_apic_physical_destination_mode =
 637             fadt->force_apic_physical_destination_mode;
 638
 639 #ifdef CONFIG_X86_PM_TIMER
 640         /* detect the location of the ACPI PM Timer */
 641         if (fadt->revision >= FADT2_REVISION_ID) {
 642                 /* FADT rev. 2 */
 643                 if (fadt->xpm_tmr_blk.address_space_id !=
 644                     ACPI_ADR_SPACE_SYSTEM_IO)
 645                         return 0;
 646
 647                 pmtmr_ioport = fadt->xpm_tmr_blk.address;
 648                 /*
 649                  * "X" fields are optional extensions to the original V1.0
 650                  * fields, so we must selectively expand V1.0 fields if the
 651                  * corresponding X field is zero.
 652                  */
 653                 if (!pmtmr_ioport)
 654                         pmtmr_ioport = fadt->V1_pm_tmr_blk;
 655         } else {
 656                 /* FADT rev. 1 */
 657                 pmtmr_ioport = fadt->V1_pm_tmr_blk;
 658         }
 659         if (pmtmr_ioport)
 660                 printk(KERN_INFO PREFIX "PM-Timer IO Port: %#x\n",
 661                        pmtmr_ioport);
 662 #endif
 663         return 0;
 664 }
 665
 666 unsigned long __init acpi_find_rsdp(void)
 667 {
 668         unsigned long rsdp_phys = 0;
 669
 670         if (efi_enabled) {
 671                 if (efi.acpi20 != EFI_INVALID_TABLE_ADDR)
 672                         return efi.acpi20;
 673                 else if (efi.acpi != EFI_INVALID_TABLE_ADDR)
 674                         return efi.acpi;
 675         }
 676         /*
 677          * Scan memory looking for the RSDP signature. First search EBDA (low
 678          * memory) paragraphs and then search upper memory (E0000-FFFFF).
 679          */
 680         rsdp_phys = acpi_scan_rsdp(0, 0x400);
 681         if (!rsdp_phys)
 682                 rsdp_phys = acpi_scan_rsdp(0xE0000, 0x20000);
 683
 684         return rsdp_phys;
 685 }
 686
 687 #ifdef  CONFIG_X86_LOCAL_APIC
 688 /*
 689  * Parse LAPIC entries in MADT
 690  * returns 0 on success, < 0 on error
 691  */
 692 static int __init acpi_parse_madt_lapic_entries(void)
 693 {
 694         int count;
 695
 696         /*
 697          * Note that the LAPIC address is obtained from the MADT (32-bit value)
 698          * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value).
 699          */
 700
 701         count =
 702             acpi_table_parse_madt(ACPI_MADT_LAPIC_ADDR_OVR,
 703                                   acpi_parse_lapic_addr_ovr, 0);
 704         if (count < 0) {
 705                 printk(KERN_ERR PREFIX
 706                        "Error parsing LAPIC address override entry\n");
 707                 return count;
 708         }
 709
 710         mp_register_lapic_address(acpi_lapic_addr);
 711
 712         count = acpi_table_parse_madt(ACPI_MADT_LAPIC, acpi_parse_lapic,
 713                                       MAX_APICS);
 714         if (!count) {
 715                 printk(KERN_ERR PREFIX "No LAPIC entries present\n");
 716                 /* TBD: Cleanup to allow fallback to MPS */
 717                 return -ENODEV;
 718         } else if (count < 0) {
 719                 printk(KERN_ERR PREFIX "Error parsing LAPIC entry\n");
 720                 /* TBD: Cleanup to allow fallback to MPS */
 721                 return count;
 722         }
 723
 724         count =
 725             acpi_table_parse_madt(ACPI_MADT_LAPIC_NMI, acpi_parse_lapic_nmi, 0);
 726         if (count < 0) {
 727                 printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n");
 728                 /* TBD: Cleanup to allow fallback to MPS */
 729                 return count;
 730         }
 731         return 0;
 732 }
 733 #endif                          /* CONFIG_X86_LOCAL_APIC */
 734
 735 #ifdef  CONFIG_X86_IO_APIC
 736 /*
 737  * Parse IOAPIC related entries in MADT
 738  * returns 0 on success, < 0 on error
 739  */
 740 static int __init acpi_parse_madt_ioapic_entries(void)
 741 {
 742         int count;
 743
 744         /*
 745          * ACPI interpreter is required to complete interrupt setup,
 746          * so if it is off, don't enumerate the io-apics with ACPI.
 747          * If MPS is present, it will handle them,
 748          * otherwise the system will stay in PIC mode
 749          */
 750         if (acpi_disabled || acpi_noirq) {
 751                 return -ENODEV;
 752         }
 753
 754         /*
 755          * if "noapic" boot option, don't look for IO-APICs
 756          */
 757         if (skip_ioapic_setup) {
 758                 printk(KERN_INFO PREFIX "Skipping IOAPIC probe "
 759                        "due to 'noapic' option.\n");
 760                 return -ENODEV;
 761         }
 762
 763         count =
 764             acpi_table_parse_madt(ACPI_MADT_IOAPIC, acpi_parse_ioapic,
 765                                   MAX_IO_APICS);
 766         if (!count) {
 767                 printk(KERN_ERR PREFIX "No IOAPIC entries present\n");
 768                 return -ENODEV;
 769         } else if (count < 0) {
 770                 printk(KERN_ERR PREFIX "Error parsing IOAPIC entry\n");
 771                 return count;
 772         }
 773
 774         count =
 775             acpi_table_parse_madt(ACPI_MADT_INT_SRC_OVR, acpi_parse_int_src_ovr,
 776                                   NR_IRQ_VECTORS);
 777         if (count < 0) {
 778                 printk(KERN_ERR PREFIX
 779                        "Error parsing interrupt source overrides entry\n");
 780                 /* TBD: Cleanup to allow fallback to MPS */
 781                 return count;
 782         }
 783
 784         /*
 785          * If BIOS did not supply an INT_SRC_OVR for the SCI
 786          * pretend we got one so we can set the SCI flags.
 787          */
 788         if (!acpi_sci_override_gsi)
 789                 acpi_sci_ioapic_setup(acpi_fadt.sci_int, 0, 0);
 790
 791         /* Fill in identity legacy mapings where no override */
 792         mp_config_acpi_legacy_irqs();
 793
 794         count =
 795             acpi_table_parse_madt(ACPI_MADT_NMI_SRC, acpi_parse_nmi_src,
 796                                   NR_IRQ_VECTORS);
 797         if (count < 0) {
 798                 printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n");
 799                 /* TBD: Cleanup to allow fallback to MPS */
 800                 return count;
 801         }
 802
 803         return 0;
 804 }
 805 #else
 806 static inline int acpi_parse_madt_ioapic_entries(void)
 807 {
 808         return -1;
 809 }
 810 #endif  /* !CONFIG_X86_IO_APIC */
 811
 812 static void __init acpi_process_madt(void)
 813 {
 814 #ifdef CONFIG_X86_LOCAL_APIC
 815         int count, error;
 816
 817         count = acpi_table_parse(ACPI_APIC, acpi_parse_madt);
 818         if (count >= 1) {
 819
 820                 /*
 821                  * Parse MADT LAPIC entries
 822                  */
 823                 error = acpi_parse_madt_lapic_entries();
 824                 if (!error) {
 825                         acpi_lapic = 1;
 826
 827 #ifdef CONFIG_X86_GENERICARCH
 828                         generic_bigsmp_probe();
 829 #endif
 830                         /*
 831                          * Parse MADT IO-APIC entries
 832                          */
 833                         error = acpi_parse_madt_ioapic_entries();
 834                         if (!error) {
 835                                 acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC;
 836                                 acpi_irq_balance_set(NULL);
 837                                 acpi_ioapic = 1;
 838
 839                                 smp_found_config = 1;
 840                                 clustered_apic_check();
 841                         }
 842                 }
 843                 if (error == -EINVAL) {
 844                         /*
 845                          * Dell Precision Workstation 410, 610 come here.
 846                          */
 847                         printk(KERN_ERR PREFIX
 848                                "Invalid BIOS MADT, disabling ACPI\n");
 849                         disable_acpi();
 850                 }
 851         }
 852 #endif
 853         return;
 854 }
 855
 856 extern int acpi_force;
 857
 858 #ifdef __i386__
 859
 860 static int __init disable_acpi_irq(struct dmi_system_id *d)
 861 {
 862         if (!acpi_force) {
 863                 printk(KERN_NOTICE "%s detected: force use of acpi=noirq\n",
 864                        d->ident);
 865                 acpi_noirq_set();
 866         }
 867         return 0;
 868 }
 869
 870 static int __init disable_acpi_pci(struct dmi_system_id *d)
 871 {
 872         if (!acpi_force) {
 873                 printk(KERN_NOTICE "%s detected: force use of pci=noacpi\n",
 874                        d->ident);
 875                 acpi_disable_pci();
 876         }
 877         return 0;
 878 }
 879
 880 static int __init dmi_disable_acpi(struct dmi_system_id *d)
 881 {
 882         if (!acpi_force) {
 883                 printk(KERN_NOTICE "%s detected: acpi off\n", d->ident);
 884                 disable_acpi();
 885         } else {
 886                 printk(KERN_NOTICE
 887                        "Warning: DMI blacklist says broken, but acpi forced\n");
 888         }
 889         return 0;
 890 }
 891
 892 /*
 893  * Limit ACPI to CPU enumeration for HT
 894  */
 895 static int __init force_acpi_ht(struct dmi_system_id *d)
 896 {
 897         if (!acpi_force) {
 898                 printk(KERN_NOTICE "%s detected: force use of acpi=ht\n",
 899                        d->ident);
 900                 disable_acpi();
 901                 acpi_ht = 1;
 902         } else {
 903                 printk(KERN_NOTICE
 904                        "Warning: acpi=force overrules DMI blacklist: acpi=ht\n");
 905         }
 906         return 0;
 907 }
 908
 909 /*
 910  * If your system is blacklisted here, but you find that acpi=force
 911  * works for you, please contact acpi-devel@sourceforge.net
 912  */
 913 static struct dmi_system_id __initdata acpi_dmi_table[] = {
 914         /*
 915          * Boxes that need ACPI disabled
 916          */
 917         {
 918          .callback = dmi_disable_acpi,
 919          .ident = "IBM Thinkpad",
 920          .matches = {
 921                      DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
 922                      DMI_MATCH(DMI_BOARD_NAME, "2629H1G"),
 923                      },
 924          },
 925
 926         /*
 927          * Boxes that need acpi=ht
 928          */
 929         {
 930          .callback = force_acpi_ht,
 931          .ident = "FSC Primergy T850",
 932          .matches = {
 933                      DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
 934                      DMI_MATCH(DMI_PRODUCT_NAME, "PRIMERGY T850"),
 935                      },
 936          },
 937         {
 938          .callback = force_acpi_ht,
 939          .ident = "DELL GX240",
 940          .matches = {
 941                      DMI_MATCH(DMI_BOARD_VENDOR, "Dell Computer Corporation"),
 942                      DMI_MATCH(DMI_BOARD_NAME, "OptiPlex GX240"),
 943                      },
 944          },
 945         {
 946          .callback = force_acpi_ht,
 947          .ident = "HP VISUALIZE NT Workstation",
 948          .matches = {
 949                      DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"),
 950                      DMI_MATCH(DMI_PRODUCT_NAME, "HP VISUALIZE NT Workstation"),
 951                      },
 952          },
 953         {
 954          .callback = force_acpi_ht,
 955          .ident = "Compaq Workstation W8000",
 956          .matches = {
 957                      DMI_MATCH(DMI_SYS_VENDOR, "Compaq"),
 958                      DMI_MATCH(DMI_PRODUCT_NAME, "Workstation W8000"),
 959                      },
 960          },
 961         {
 962          .callback = force_acpi_ht,
 963          .ident = "ASUS P4B266",
 964          .matches = {
 965                      DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
 966                      DMI_MATCH(DMI_BOARD_NAME, "P4B266"),
 967                      },
 968          },
 969         {
 970          .callback = force_acpi_ht,
 971          .ident = "ASUS P2B-DS",
 972          .matches = {
 973                      DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
 974                      DMI_MATCH(DMI_BOARD_NAME, "P2B-DS"),
 975                      },
 976          },
 977         {
 978          .callback = force_acpi_ht,
 979          .ident = "ASUS CUR-DLS",
 980          .matches = {
 981                      DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
 982                      DMI_MATCH(DMI_BOARD_NAME, "CUR-DLS"),
 983                      },
 984          },
 985         {
 986          .callback = force_acpi_ht,
 987          .ident = "ABIT i440BX-W83977",
 988          .matches = {
 989                      DMI_MATCH(DMI_BOARD_VENDOR, "ABIT <http://www.abit.com>"),
 990                      DMI_MATCH(DMI_BOARD_NAME, "i440BX-W83977 (BP6)"),
 991                      },
 992          },
 993         {
 994          .callback = force_acpi_ht,
 995          .ident = "IBM Bladecenter",
 996          .matches = {
 997                      DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
 998                      DMI_MATCH(DMI_BOARD_NAME, "IBM eServer BladeCenter HS20"),
 999                      },
1000          },
1001         {
1002          .callback = force_acpi_ht,
1003          .ident = "IBM eServer xSeries 360",
1004          .matches = {
1005                      DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1006                      DMI_MATCH(DMI_BOARD_NAME, "eServer xSeries 360"),
1007                      },
1008          },
1009         {
1010          .callback = force_acpi_ht,
1011          .ident = "IBM eserver xSeries 330",
1012          .matches = {
1013                      DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1014                      DMI_MATCH(DMI_BOARD_NAME, "eserver xSeries 330"),
1015                      },
1016          },
1017         {
1018          .callback = force_acpi_ht,
1019          .ident = "IBM eserver xSeries 440",
1020          .matches = {
1021                      DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),
1022                      DMI_MATCH(DMI_PRODUCT_NAME, "eserver xSeries 440"),
1023                      },
1024          },
1025
1026         /*
1027          * Boxes that need ACPI PCI IRQ routing disabled
1028          */
1029         {
1030          .callback = disable_acpi_irq,
1031          .ident = "ASUS A7V",
1032          .matches = {
1033                      DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC"),
1034                      DMI_MATCH(DMI_BOARD_NAME, "<A7V>"),
1035                      /* newer BIOS, Revision 1011, does work */
1036                      DMI_MATCH(DMI_BIOS_VERSION,
1037                                "ASUS A7V ACPI BIOS Revision 1007"),
1038                      },
1039          },
1040
1041         /*
1042          * Boxes that need ACPI PCI IRQ routing and PCI scan disabled
1043          */
1044         {                       /* _BBN 0 bug */
1045          .callback = disable_acpi_pci,
1046          .ident = "ASUS PR-DLS",
1047          .matches = {
1048                      DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
1049                      DMI_MATCH(DMI_BOARD_NAME, "PR-DLS"),
1050                      DMI_MATCH(DMI_BIOS_VERSION,
1051                                "ASUS PR-DLS ACPI BIOS Revision 1010"),
1052                      DMI_MATCH(DMI_BIOS_DATE, "03/21/2003")
1053                      },
1054          },
1055         {
1056          .callback = disable_acpi_pci,
1057          .ident = "Acer TravelMate 36x Laptop",
1058          .matches = {
1059                      DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
1060                      DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"),
1061                      },
1062          },
1063         {}
1064 };
1065
1066 #endif                          /* __i386__ */
1067
1068 /*
1069  * acpi_boot_table_init() and acpi_boot_init()
1070  *  called from setup_arch(), always.
1071  *      1. checksums all tables
1072  *      2. enumerates lapics
1073  *      3. enumerates io-apics
1074  *
1075  * acpi_table_init() is separate to allow reading SRAT without
1076  * other side effects.
1077  *
1078  * side effects of acpi_boot_init:
1079  *      acpi_lapic = 1 if LAPIC found
1080  *      acpi_ioapic = 1 if IOAPIC found
1081  *      if (acpi_lapic && acpi_ioapic) smp_found_config = 1;
1082  *      if acpi_blacklisted() acpi_disabled = 1;
1083  *      acpi_irq_model=...
1084  *      ...
1085  *
1086  * return value: (currently ignored)
1087  *      0: success
1088  *      !0: failure
1089  */
1090
1091 int __init acpi_boot_table_init(void)
1092 {
1093         int error;
1094
1095 #ifdef __i386__
1096         dmi_check_system(acpi_dmi_table);
1097 #endif
1098
1099         /*
1100          * If acpi_disabled, bail out
1101          * One exception: acpi=ht continues far enough to enumerate LAPICs
1102          */
1103         if (acpi_disabled && !acpi_ht)
1104                 return 1;
1105
1106         /*
1107          * Initialize the ACPI boot-time table parser.
1108          */
1109         error = acpi_table_init();
1110         if (error) {
1111                 disable_acpi();
1112                 return error;
1113         }
1114
1115         acpi_table_parse(ACPI_BOOT, acpi_parse_sbf);
1116
1117         /*
1118          * blacklist may disable ACPI entirely
1119          */
1120         error = acpi_blacklisted();
1121         if (error) {
1122                 if (acpi_force) {
1123                         printk(KERN_WARNING PREFIX "acpi=force override\n");
1124                 } else {
1125                         printk(KERN_WARNING PREFIX "Disabling ACPI support\n");
1126                         disable_acpi();
1127                         return error;
1128                 }
1129         }
1130
1131         return 0;
1132 }
1133
1134 int __init acpi_boot_init(void)
1135 {
1136         /*
1137          * If acpi_disabled, bail out
1138          * One exception: acpi=ht continues far enough to enumerate LAPICs
1139          */
1140         if (acpi_disabled && !acpi_ht)
1141                 return 1;
1142
1143         acpi_table_parse(ACPI_BOOT, acpi_parse_sbf);
1144
1145         /*
1146          * set sci_int and PM timer address
1147          */
1148         acpi_table_parse(ACPI_FADT, acpi_parse_fadt);
1149
1150         /*
1151          * Process the Multiple APIC Description Table (MADT), if present
1152          */
1153         acpi_process_madt();
1154
1155         acpi_table_parse(ACPI_HPET, acpi_parse_hpet);
1156
1157         return 0;
1158 }