reactos/ntoskrnl/config/i386/cmhardwr.c

   1 /*
   2  * PROJECT:         ReactOS Kernel
   3  * LICENSE:         GPL - See COPYING in the top level directory
   4  * FILE:            ntoskrnl/config/i386/cmhardwr.c
   5  * PURPOSE:         Configuration Manager - Hardware-Specific Code
   6  * PROGRAMMERS:     Alex Ionescu (alex.ionescu@reactos.org)
   7  */
   8
   9 /* INCLUDES ******************************************************************/
  10
  11 #include "ntoskrnl.h"
  12 #define NDEBUG
  13 #include "debug.h"
  14
  15 /* GLOBALS *******************************************************************/
  16
  17 PCHAR CmpID1 = "80%u86-%c%x";
  18 PCHAR CmpID2 = "x86 Family %u Model %u Stepping %u";
  19 PCHAR CmpBiosStrings[] =
  20 {
  21     "Ver",
  22     "Rev",
  23     "Rel",
  24     "v0", "v1", "v2", "v3", "v4", "v5", "v6", "v7", "v8", "v9",
  25     "v 0", "v 1", "v 2", "v 3", "v 4", "v 5", "v 6", "v 7", "v 8", "v 9",
  26     NULL
  27 };
  28
  29 PCHAR CmpBiosBegin, CmpBiosSearchStart, CmpBiosSearchEnd;
  30
  31 /* FUNCTIONS *****************************************************************/
  32
  33 BOOLEAN
  34 NTAPI
  35 CmpGetBiosDate(IN PCHAR BiosStart,
  36                IN ULONG BiosLength,
  37                IN PCHAR BiosDate,
  38                IN BOOLEAN FromBios)
  39 {
  40     CHAR LastDate[11] = {0}, CurrentDate[11];
  41     PCHAR p, pp;
  42
  43     /* Skip the signature and the magic, and loop the BIOS ROM */
  44     p = BiosStart + 2;
  45     pp = BiosStart + BiosLength - 5;
  46     while (p < pp)
  47     {
  48         /* Check for xx/yy/zz which we assume to be a date */
  49         if ((p[0] == '/') &&
  50             (p[3] == '/') &&
  51             (isdigit(p[-1])) &&
  52             (isdigit(p[1])) &&
  53             (isdigit(p[2])) &&
  54             (isdigit(p[4])) &&
  55             (isdigit(p[5])))
  56         {
  57             /* Copy the string proper */
  58             RtlMoveMemory(&CurrentDate[5], p - 2, 5);
  59
  60             /* Add a 0 if the month only has one digit */
  61             if (!isdigit(CurrentDate[5])) CurrentDate[5] = '0';
  62
  63             /* Now copy the year */
  64             CurrentDate[2] = p[4];
  65             CurrentDate[3] = p[5];
  66             CurrentDate[4] = CurrentDate[7] = CurrentDate[10] = ANSI_NULL;
  67
  68             /* If the date comes from the BIOS, check if it's a 4-digit year */
  69             if ((FromBios) &&
  70                 (isdigit(p[6])) &&
  71                 (isdigit(p[7])) &&
  72                 ((RtlEqualMemory(&p[4], "19", 2)) ||
  73                  (RtlEqualMemory(&p[4], "20", 2))))
  74             {
  75                 /* Copy the year proper */
  76                 CurrentDate[0] = p[4];
  77                 CurrentDate[1] = p[5];
  78                 CurrentDate[2] = p[6];
  79                 CurrentDate[3] = p[7];
  80             }
  81             else
  82             {
  83                 /* Otherwise, we'll just assume anything under 80 is 2000 */
  84                 if (strtoul(&CurrentDate[2], NULL, 10) < 80)
  85                 {
  86                     /* Hopefully your BIOS wasn't made in 1979 */
  87                     CurrentDate[0] = '2';
  88                     CurrentDate[1] = '0';
  89                 }
  90                 else
  91                 {
  92                     /* Anything over 80, was probably made in the 1900s... */
  93                     CurrentDate[0] = '1';
  94                     CurrentDate[1] = '9';
  95                 }
  96             }
  97
  98             /* Add slashes where we previously had NULLs */
  99             CurrentDate[4] = CurrentDate[7] = '/';
 100
 101             /* Check which date is newer */
 102             if (memcmp(LastDate, CurrentDate, 10) < 0)
 103             {
 104                 /* Found a newer date, select it */
 105                 RtlMoveMemory(LastDate, CurrentDate, 10);
 106             }
 107
 108             p += 2;
 109         }
 110         p++;
 111     }
 112
 113     /* Make sure we found a date */
 114     if (LastDate[0])
 115     {
 116         /* Copy the year at the pp, and keep only the last two digits */
 117         RtlMoveMemory(BiosDate, &LastDate[5], 5);
 118         BiosDate[5] = '/';
 119         BiosDate[6] = LastDate[2];
 120         BiosDate[7] = LastDate[3];
 121         BiosDate[8] = ANSI_NULL;
 122         return TRUE;
 123     }
 124
 125     /* No date found, return empty string */
 126     BiosDate[0] = ANSI_NULL;
 127     return FALSE;
 128 }
 129
 130 BOOLEAN
 131 NTAPI
 132 CmpGetBiosVersion(IN PCHAR BiosStart,
 133                   IN ULONG BiosLength,
 134                   IN PCHAR BiosVersion)
 135 {
 136     CHAR Buffer[128];
 137     PCHAR p, pp;
 138     USHORT i;
 139
 140     /* Check if we were given intitial data for the search */
 141     if (BiosStart)
 142     {
 143         /* Save it for later use */
 144         CmpBiosBegin = BiosStart;
 145         CmpBiosSearchStart = BiosStart + 1;
 146         CmpBiosSearchEnd = BiosStart + BiosLength - 2;
 147     }
 148
 149     /* Now loop the BIOS area */
 150     for (;;)
 151     {
 152         /* Start an initial search looking for numbers and periods */
 153         pp = NULL;
 154         while (CmpBiosSearchStart <= CmpBiosSearchEnd)
 155         {
 156             /* Check if we have an "x.y" version string */
 157             if ((*CmpBiosSearchStart == '.') &&
 158                 (*(CmpBiosSearchStart + 1) >= '0') &&
 159                 (*(CmpBiosSearchStart + 1) <= '9') &&
 160                 (*(CmpBiosSearchStart - 1) >= '0') &&
 161                 (*(CmpBiosSearchStart - 1) <= '9'))
 162             {
 163                 /* Start looking in this area for the actual BIOS Version */
 164                 pp = CmpBiosSearchStart;
 165                 break;
 166             }
 167             else
 168             {
 169                 /* Keep searching */
 170                 CmpBiosSearchStart++;
 171             }
 172         }
 173
 174         /* Break out if we're went past the BIOS area */
 175         if (CmpBiosSearchStart > CmpBiosSearchEnd) return FALSE;
 176
 177         /* Move to the next 2 bytes */
 178         CmpBiosSearchStart += 2;
 179
 180         /* Null-terminate our scratch buffer and start the string here */
 181         Buffer[127] = ANSI_NULL;
 182         p = &Buffer[127];
 183
 184         /* Go back one character since we're doing this backwards */
 185         pp--;
 186
 187         /* Loop the identifier we found as long as it's valid */
 188         i = 0;
 189         while ((i++ < 127) &&
 190                (pp >= CmpBiosBegin) &&
 191                (*pp >= ' ') &&
 192                (*pp != '$'))
 193         {
 194             /* Copy the character */
 195             *--p = *pp--;
 196         }
 197
 198         /* Go past the last character since we went backwards */
 199         pp++;
 200
 201         /* Loop the strings we recognize */
 202         for (i = 0; CmpBiosStrings[i]; i++)
 203         {
 204             /* Check if a match was found */
 205             if (strstr(p, CmpBiosStrings[i])) goto Match;
 206         }
 207     }
 208
 209 Match:
 210     /* Skip until we find a space */
 211     for (; *pp == ' '; pp++);
 212
 213     /* Loop the final string */
 214     i = 0;
 215     do
 216     {
 217         /* Copy the character into the final string */
 218         BiosVersion[i] = *pp++;
 219     } while ((++i < 127) &&
 220              (pp <= (CmpBiosSearchEnd + 1)) &&
 221              (*pp >= ' ') &&
 222              (*pp != '$'));
 223
 224     /* Null-terminate the version string */
 225     BiosVersion[i] = ANSI_NULL;
 226     return TRUE;
 227 }
 228
 229 NTSTATUS
 230 NTAPI
 231 CmpInitializeMachineDependentConfiguration(IN PLOADER_PARAMETER_BLOCK LoaderBlock)
 232 {
 233     UNICODE_STRING KeyName, ValueName, Data, SectionName;
 234     OBJECT_ATTRIBUTES ObjectAttributes;
 235     ULONG HavePae, CacheSize, Length, TotalLength = 0, i, Disposition;
 236     SIZE_T ViewSize;
 237     NTSTATUS Status;
 238     HANDLE KeyHandle, BiosHandle, SystemHandle, FpuHandle, SectionHandle;
 239     CONFIGURATION_COMPONENT_DATA ConfigData;
 240     CHAR Buffer[128];
 241     ULONG ExtendedId, Dummy;
 242     PKPRCB Prcb;
 243     USHORT IndexTable[MaximumType + 1] = {0};
 244     ANSI_STRING TempString;
 245     PCHAR PartialString = NULL, BiosVersion;
 246     CHAR CpuString[48];
 247     PVOID BaseAddress = NULL;
 248     LARGE_INTEGER ViewBase = {{0, 0}};
 249     ULONG_PTR VideoRomBase;
 250     PCHAR CurrentVersion;
 251     extern UNICODE_STRING KeRosProcessorName, KeRosBiosDate, KeRosBiosVersion;
 252     extern UNICODE_STRING KeRosVideoBiosDate, KeRosVideoBiosVersion;
 253
 254     /* Open the SMSS Memory Management key */
 255     RtlInitUnicodeString(&KeyName,
 256                          L"\\Registry\\Machine\\SYSTEM\\CurrentControlSet\\"
 257                          L"Control\\Session Manager\\Memory Management");
 258     InitializeObjectAttributes(&ObjectAttributes,
 259                                &KeyName,
 260                                OBJ_CASE_INSENSITIVE,
 261                                NULL,
 262                                NULL);
 263     Status = NtOpenKey(&KeyHandle, KEY_READ | KEY_WRITE, &ObjectAttributes);
 264     if (NT_SUCCESS(Status))
 265     {
 266         /* Detect if PAE is enabled */
 267         HavePae = SharedUserData->ProcessorFeatures[PF_PAE_ENABLED];
 268
 269         /* Set the value */
 270         RtlInitUnicodeString(&ValueName, L"PhysicalAddressExtension");
 271         NtSetValueKey(KeyHandle,
 272                       &ValueName,
 273                       0,
 274                       REG_DWORD,
 275                       &HavePae,
 276                       sizeof(HavePae));
 277
 278         /* Close the key */
 279         NtClose(KeyHandle);
 280     }
 281
 282     /* Open the hardware description key */
 283     RtlInitUnicodeString(&KeyName,
 284                          L"\\Registry\\Machine\\Hardware\\Description\\System");
 285     InitializeObjectAttributes(&ObjectAttributes,
 286                                &KeyName,
 287                                OBJ_CASE_INSENSITIVE,
 288                                NULL,
 289                                NULL);
 290     Status = NtOpenKey(&SystemHandle, KEY_READ | KEY_WRITE, &ObjectAttributes);
 291     if (!NT_SUCCESS(Status)) return Status;
 292
 293     /* Create the BIOS Information key */
 294     RtlInitUnicodeString(&KeyName,
 295                          L"\\Registry\\Machine\\SYSTEM\\CurrentControlSet\\"
 296                          L"Control\\BIOSINFO");
 297     InitializeObjectAttributes(&ObjectAttributes,
 298                                &KeyName,
 299                                OBJ_CASE_INSENSITIVE,
 300                                NULL,
 301                                NULL);
 302     Status = NtCreateKey(&BiosHandle,
 303                          KEY_ALL_ACCESS,
 304                          &ObjectAttributes,
 305                          0,
 306                          NULL,
 307                          REG_OPTION_NON_VOLATILE,
 308                          &Disposition);
 309     if (ExpInTextModeSetup)
 310     {
 311         if (!NT_SUCCESS(Status))
 312             BiosHandle = NULL;
 313     }
 314     else if (!NT_SUCCESS(Status))
 315         return Status;
 316
 317     /* Create the CPU Key, and check if it already existed */
 318     RtlInitUnicodeString(&KeyName, L"CentralProcessor");
 319     InitializeObjectAttributes(&ObjectAttributes,
 320                                &KeyName,
 321                                OBJ_CASE_INSENSITIVE,
 322                                SystemHandle,
 323                                NULL);
 324     Status = NtCreateKey(&KeyHandle,
 325                          KEY_READ | KEY_WRITE,
 326                          &ObjectAttributes,
 327                          0,
 328                          NULL,
 329                          0,
 330                          &Disposition);
 331     NtClose(KeyHandle);
 332
 333     /* The key shouldn't already exist */
 334     if (Disposition == REG_CREATED_NEW_KEY)
 335     {
 336         /* Allocate the configuration data for cmconfig.c */
 337         CmpConfigurationData = ExAllocatePoolWithTag(PagedPool,
 338                                                      CmpConfigurationAreaSize,
 339                                                      TAG_CM);
 340         if (!CmpConfigurationData) return STATUS_INSUFFICIENT_RESOURCES;
 341
 342         /* Loop all CPUs */
 343         for (i = 0; i < KeNumberProcessors; i++)
 344         {
 345             /* Get the PRCB */
 346             Prcb = KiProcessorBlock[i];
 347
 348             /* Setup the Configuration Entry for the Processor */
 349             RtlZeroMemory(&ConfigData, sizeof (ConfigData));
 350             ConfigData.ComponentEntry.Class = ProcessorClass;
 351             ConfigData.ComponentEntry.Type = CentralProcessor;
 352             ConfigData.ComponentEntry.Key = i;
 353             ConfigData.ComponentEntry.AffinityMask = AFFINITY_MASK(i);
 354             ConfigData.ComponentEntry.Identifier = Buffer;
 355
 356             /* Check if the CPU doesn't support CPUID */
 357             if (!Prcb->CpuID)
 358             {
 359                 /* Build ID1-style string for older CPUs */
 360                 sprintf(Buffer,
 361                         CmpID1,
 362                         Prcb->CpuType,
 363                         (Prcb->CpuStep >> 8) + 'A',
 364                         Prcb->CpuStep & 0xff);
 365             }
 366             else
 367             {
 368                 /* Build ID2-style string for newer CPUs */
 369                 sprintf(Buffer,
 370                         CmpID2,
 371                         Prcb->CpuType,
 372                         (Prcb->CpuStep >> 8),
 373                         Prcb->CpuStep & 0xff);
 374             }
 375
 376             /* Save the ID string length now that we've created it */
 377             ConfigData.ComponentEntry.IdentifierLength = strlen(Buffer) + 1;
 378
 379             /* Initialize the registry configuration node for it */
 380             Status = CmpInitializeRegistryNode(&ConfigData,
 381                                                SystemHandle,
 382                                                &KeyHandle,
 383                                                InterfaceTypeUndefined,
 384                                                0xFFFFFFFF,
 385                                                IndexTable);
 386             if (!NT_SUCCESS(Status)) return(Status);
 387
 388             /* Check if we have an FPU */
 389             if (KeI386NpxPresent)
 390             {
 391                 /* Setup the Configuration Entry for the FPU */
 392                 RtlZeroMemory(&ConfigData, sizeof(ConfigData));
 393                 ConfigData.ComponentEntry.Class = ProcessorClass;
 394                 ConfigData.ComponentEntry.Type = FloatingPointProcessor;
 395                 ConfigData.ComponentEntry.Key = i;
 396                 ConfigData.ComponentEntry.AffinityMask = AFFINITY_MASK(i);
 397                 ConfigData.ComponentEntry.Identifier = Buffer;
 398
 399                 /* For 386 cpus, the CPU pp is the identifier */
 400                 if (Prcb->CpuType == 3) strcpy(Buffer, "80387");
 401
 402                 /* Save the ID string length now that we've created it */
 403                 ConfigData.ComponentEntry.IdentifierLength = strlen(Buffer) + 1;
 404
 405                 /* Initialize the registry configuration node for it */
 406                 Status = CmpInitializeRegistryNode(&ConfigData,
 407                                                    SystemHandle,
 408                                                    &FpuHandle,
 409                                                    InterfaceTypeUndefined,
 410                                                    0xFFFFFFFF,
 411                                                    IndexTable);
 412                 if (!NT_SUCCESS(Status))
 413                 {
 414                     /* Failed, close the CPU handle and return */
 415                     NtClose(KeyHandle);
 416                     return Status;
 417                 }
 418
 419                 /* Close this new handle */
 420                 NtClose(FpuHandle);
 421
 422                 /* Stay on this CPU only */
 423                 KeSetSystemAffinityThread(Prcb->SetMember);
 424                 if (!Prcb->CpuID)
 425                 {
 426                     /* Uh oh, no CPUID! */
 427                 }
 428                 else
 429                 {
 430                     /* Check if we have extended CPUID that supports name ID */
 431                     CPUID(0x80000000, &ExtendedId, &Dummy, &Dummy, &Dummy);
 432                     if (ExtendedId >= 0x80000004)
 433                     {
 434                         /* Do all the CPUIDs required to get the full name */
 435                         PartialString = CpuString;
 436                         for (ExtendedId = 2; ExtendedId <= 4; ExtendedId++)
 437                         {
 438                             /* Do the CPUID and save the name string */
 439                             CPUID(0x80000000 | ExtendedId,
 440                                   (PULONG)PartialString,
 441                                   (PULONG)PartialString + 1,
 442                                   (PULONG)PartialString + 2,
 443                                   (PULONG)PartialString + 3);
 444
 445                             /* Go to the next name string */
 446                             PartialString += 16;
 447                         }
 448
 449                         /* Null-terminate it */
 450                         CpuString[47] = ANSI_NULL;
 451                     }
 452                 }
 453
 454                 /* Get the cache size while we're still localized */
 455                 CacheSize = ((PKIPCR)KeGetPcr())->SecondLevelCacheSize;
 456
 457                 /* Go back to user affinity */
 458                 KeRevertToUserAffinityThread();
 459
 460                 /* Check if we have a CPU Name */
 461                 if (PartialString)
 462                 {
 463                     /* Convert it to Unicode */
 464                     RtlInitAnsiString(&TempString, CpuString);
 465                     RtlAnsiStringToUnicodeString(&Data, &TempString, TRUE);
 466
 467                     /* Add it to the registry */
 468                     RtlInitUnicodeString(&ValueName, L"ProcessorNameString");
 469                     Status = NtSetValueKey(KeyHandle,
 470                                            &ValueName,
 471                                            0,
 472                                            REG_SZ,
 473                                            Data.Buffer,
 474                                            Data.Length + sizeof(UNICODE_NULL));
 475
 476                     /* ROS: Save a copy for bugzilla reporting */
 477                     RtlCreateUnicodeString(&KeRosProcessorName, Data.Buffer);
 478
 479                     /* Free the temporary buffer */
 480                     RtlFreeUnicodeString(&Data);
 481                 }
 482
 483                 /* Check if we had a Vendor ID */
 484                 if (Prcb->VendorString)
 485                 {
 486                     /* Convert it to Unicode */
 487                     RtlInitAnsiString(&TempString, Prcb->VendorString);
 488                     RtlAnsiStringToUnicodeString(&Data, &TempString, TRUE);
 489
 490                     /* Add it to the registry */
 491                     RtlInitUnicodeString(&ValueName, L"VendorIdentifier");
 492                     Status = NtSetValueKey(KeyHandle,
 493                                            &ValueName,
 494                                            0,
 495                                            REG_SZ,
 496                                            Data.Buffer,
 497                                            Data.Length + sizeof(UNICODE_NULL));
 498
 499                     /* Free the temporary buffer */
 500                     RtlFreeUnicodeString(&Data);
 501                 }
 502
 503                 /* Check if we have features bits */
 504                 if (Prcb->FeatureBits)
 505                 {
 506                     /* Add them to the registry */
 507                     RtlInitUnicodeString(&ValueName, L"FeatureSet");
 508                     Status = NtSetValueKey(KeyHandle,
 509                                            &ValueName,
 510                                            0,
 511                                            REG_DWORD,
 512                                            &Prcb->FeatureBits,
 513                                            sizeof(Prcb->FeatureBits));
 514                 }
 515
 516                 /* Check if we detected the CPU Speed */
 517                 if (Prcb->MHz)
 518                 {
 519                     /* Add it to the registry */
 520                     RtlInitUnicodeString(&ValueName, L"~MHz");
 521                     Status = NtSetValueKey(KeyHandle,
 522                                            &ValueName,
 523                                            0,
 524                                            REG_DWORD,
 525                                            &Prcb->MHz,
 526                                            sizeof(Prcb->MHz));
 527                 }
 528
 529                 /* Check if we have an update signature */
 530                 if (Prcb->UpdateSignature.QuadPart)
 531                 {
 532                     /* Add it to the registry */
 533                     RtlInitUnicodeString(&ValueName, L"Update Signature");
 534                     Status = NtSetValueKey(KeyHandle,
 535                                            &ValueName,
 536                                            0,
 537                                            REG_BINARY,
 538                                            &Prcb->UpdateSignature,
 539                                            sizeof(Prcb->UpdateSignature));
 540                 }
 541
 542                 /* Close the processor handle */
 543                 NtClose(KeyHandle);
 544
 545                 /* FIXME: Detect CPU mismatches */
 546             }
 547         }
 548
 549         /* Free the configuration data */
 550         ExFreePoolWithTag(CmpConfigurationData, TAG_CM);
 551     }
 552
 553     /* Open physical memory */
 554     RtlInitUnicodeString(&SectionName, L"\\Device\\PhysicalMemory");
 555     InitializeObjectAttributes(&ObjectAttributes,
 556                                &SectionName,
 557                                OBJ_CASE_INSENSITIVE,
 558                                NULL,
 559                                NULL);
 560     Status = ZwOpenSection(&SectionHandle,
 561                            SECTION_ALL_ACCESS,
 562                            &ObjectAttributes);
 563     if (!NT_SUCCESS(Status)) goto Quickie;
 564
 565     /* Map the first 1KB of memory to get the IVT */
 566     ViewSize = PAGE_SIZE;
 567     Status = ZwMapViewOfSection(SectionHandle,
 568                                 NtCurrentProcess(),
 569                                 &BaseAddress,
 570                                 0,
 571                                 ViewSize,
 572                                 &ViewBase,
 573                                 &ViewSize,
 574                                 ViewUnmap,
 575                                 MEM_DOS_LIM,
 576                                 PAGE_READWRITE);
 577     if (!NT_SUCCESS(Status))
 578     {
 579         /* Assume default */
 580         VideoRomBase = 0xC0000;
 581     }
 582     else
 583     {
 584         /* Calculate the base address from the vector */
 585         VideoRomBase = (*((PULONG)BaseAddress + 0x10) >> 12) & 0xFFFF0;
 586         VideoRomBase += *((PULONG)BaseAddress + 0x10) & 0xFFF0;
 587
 588         /* Now get to the actual ROM Start and make sure it's not invalid*/
 589         VideoRomBase &= 0xFFFF8000;
 590         if (VideoRomBase < 0xC0000) VideoRomBase = 0xC0000;
 591
 592         /* And unmap the section */
 593         ZwUnmapViewOfSection(NtCurrentProcess(), BaseAddress);
 594     }
 595
 596     /* Allocate BIOS Version pp Buffer */
 597     BiosVersion = ExAllocatePoolWithTag(PagedPool, PAGE_SIZE, TAG_CM);
 598
 599     /* Setup settings to map the 64K BIOS ROM */
 600     BaseAddress = 0;
 601     ViewSize = 16 * PAGE_SIZE;
 602     ViewBase.LowPart = 0xF0000;
 603     ViewBase.HighPart = 0;
 604
 605     /* Map it */
 606     Status = ZwMapViewOfSection(SectionHandle,
 607                                 NtCurrentProcess(),
 608                                 &BaseAddress,
 609                                 0,
 610                                 ViewSize,
 611                                 &ViewBase,
 612                                 &ViewSize,
 613                                 ViewUnmap,
 614                                 MEM_DOS_LIM,
 615                                 PAGE_READWRITE);
 616     if (NT_SUCCESS(Status))
 617     {
 618         /* Scan the ROM to get the BIOS Date */
 619         if (CmpGetBiosDate(BaseAddress, 16 * PAGE_SIZE, Buffer, TRUE))
 620         {
 621             /* Convert it to Unicode */
 622             RtlInitAnsiString(&TempString, Buffer);
 623             RtlAnsiStringToUnicodeString(&Data, &TempString, TRUE);
 624
 625             /* Write the date into the registry */
 626             RtlInitUnicodeString(&ValueName, L"SystemBiosDate");
 627             Status = NtSetValueKey(SystemHandle,
 628                                    &ValueName,
 629                                    0,
 630                                    REG_SZ,
 631                                    Data.Buffer,
 632                                    Data.Length + sizeof(UNICODE_NULL));
 633
 634             /* Free the string */
 635             RtlFreeUnicodeString(&Data);
 636
 637             if (BiosHandle)
 638             {
 639                 /* Get the BIOS Date Identifier */
 640                 RtlCopyMemory(Buffer, (PCHAR)BaseAddress + (16 * PAGE_SIZE - 11), 8);
 641                 Buffer[8] = ANSI_NULL;
 642
 643                 /* Convert it to unicode */
 644                 RtlInitAnsiString(&TempString, Buffer);
 645                 Status = RtlAnsiStringToUnicodeString(&Data, &TempString, TRUE);
 646                 if (NT_SUCCESS(Status))
 647                 {
 648                     /* Save it to the registry */
 649                     Status = NtSetValueKey(BiosHandle,
 650                                            &ValueName,
 651                                            0,
 652                                            REG_SZ,
 653                                            Data.Buffer,
 654                                            Data.Length + sizeof(UNICODE_NULL));
 655
 656                     /* ROS: Save a copy for bugzilla reporting */
 657                     RtlCreateUnicodeString(&KeRosBiosDate, Data.Buffer);
 658
 659                     /* Free the string */
 660                     RtlFreeUnicodeString(&Data);
 661                 }
 662
 663                 /* Close the bios information handle */
 664                 NtClose(BiosHandle);
 665             }
 666         }
 667
 668         /* Get the BIOS Version */
 669         if (CmpGetBiosVersion(BaseAddress, 16 * PAGE_SIZE, Buffer))
 670         {
 671             /* Start at the beginning of our buffer */
 672             CurrentVersion = BiosVersion;
 673             do
 674             {
 675                 /* Convert to Unicode */
 676                 RtlInitAnsiString(&TempString, Buffer);
 677                 RtlAnsiStringToUnicodeString(&Data, &TempString, TRUE);
 678
 679                 /* Calculate the length of this string and copy it in */
 680                 Length = Data.Length + sizeof(UNICODE_NULL);
 681                 RtlMoveMemory(CurrentVersion, Data.Buffer, Length);
 682
 683                 /* Free the unicode string */
 684                 RtlFreeUnicodeString(&Data);
 685
 686                 /* Update the total length and see if we're out of space */
 687                 TotalLength += Length;
 688                 if (TotalLength + 256 + sizeof(UNICODE_NULL) > PAGE_SIZE)
 689                 {
 690                     /* One more string would push us out, so stop here */
 691                     break;
 692                 }
 693
 694                 /* Go to the next string inside the multi-string buffer */
 695                 CurrentVersion += Length;
 696
 697                 /* Query the next BIOS Version */
 698             } while (CmpGetBiosVersion(NULL, 0, Buffer));
 699
 700             /* Check if we found any strings at all */
 701             if (TotalLength)
 702             {
 703                 /* Add the final null-terminator */
 704                 *(PWSTR)CurrentVersion = UNICODE_NULL;
 705                 TotalLength += sizeof(UNICODE_NULL);
 706
 707                 /* Write the BIOS Version to the registry */
 708                 RtlInitUnicodeString(&ValueName, L"SystemBiosVersion");
 709                 Status = NtSetValueKey(SystemHandle,
 710                                        &ValueName,
 711                                        0,
 712                                        REG_MULTI_SZ,
 713                                        BiosVersion,
 714                                        TotalLength);
 715
 716                 /* ROS: Save a copy for bugzilla reporting */
 717                 RtlCreateUnicodeString(&KeRosBiosVersion, (PWCH)BiosVersion);
 718             }
 719         }
 720
 721         /* Unmap the section */
 722         ZwUnmapViewOfSection(NtCurrentProcess(), BaseAddress);
 723     }
 724
 725     /* Now prepare for Video BIOS Mapping of 32KB */
 726     BaseAddress = 0;
 727     ViewSize = 8 * PAGE_SIZE;
 728     ViewBase.LowPart = VideoRomBase;
 729     ViewBase.HighPart = 0;
 730
 731     /* Map it */
 732     Status = ZwMapViewOfSection(SectionHandle,
 733                                 NtCurrentProcess(),
 734                                 &BaseAddress,
 735                                 0,
 736                                 ViewSize,
 737                                 &ViewBase,
 738                                 &ViewSize,
 739                                 ViewUnmap,
 740                                 MEM_DOS_LIM,
 741                                 PAGE_READWRITE);
 742     if (NT_SUCCESS(Status))
 743     {
 744         /* Scan the ROM to get the BIOS Date */
 745         if (CmpGetBiosDate(BaseAddress, 8 * PAGE_SIZE, Buffer, FALSE))
 746         {
 747             /* Convert it to Unicode */
 748             RtlInitAnsiString(&TempString, Buffer);
 749             RtlAnsiStringToUnicodeString(&Data, &TempString, TRUE);
 750
 751             /* Write the date into the registry */
 752             RtlInitUnicodeString(&ValueName, L"VideoBiosDate");
 753             Status = NtSetValueKey(SystemHandle,
 754                                    &ValueName,
 755                                    0,
 756                                    REG_SZ,
 757                                    Data.Buffer,
 758                                    Data.Length + sizeof(UNICODE_NULL));
 759
 760             /* ROS: Save a copy for bugzilla reporting */
 761             RtlCreateUnicodeString(&KeRosVideoBiosDate, Data.Buffer);
 762
 763             /* Free the string */
 764             RtlFreeUnicodeString(&Data);
 765         }
 766
 767         /* Get the Video BIOS Version */
 768         if (CmpGetBiosVersion(BaseAddress, 8 * PAGE_SIZE, Buffer))
 769         {
 770             /* Start at the beginning of our buffer */
 771             CurrentVersion = BiosVersion;
 772             do
 773             {
 774                 /* Convert to Unicode */
 775                 RtlInitAnsiString(&TempString, Buffer);
 776                 RtlAnsiStringToUnicodeString(&Data, &TempString, TRUE);
 777
 778                 /* Calculate the length of this string and copy it in */
 779                 Length = Data.Length + sizeof(UNICODE_NULL);
 780                 RtlMoveMemory(CurrentVersion, Data.Buffer, Length);
 781
 782                 /* Free the unicode string */
 783                 RtlFreeUnicodeString(&Data);
 784
 785                 /* Update the total length and see if we're out of space */
 786                 TotalLength += Length;
 787                 if (TotalLength + 256 + sizeof(UNICODE_NULL) > PAGE_SIZE)
 788                 {
 789                     /* One more string would push us out, so stop here */
 790                     break;
 791                 }
 792
 793                 /* Go to the next string inside the multi-string buffer */
 794                 CurrentVersion += Length;
 795
 796                 /* Query the next BIOS Version */
 797             } while (CmpGetBiosVersion(NULL, 0, Buffer));
 798
 799             /* Check if we found any strings at all */
 800             if (TotalLength)
 801             {
 802                 /* Add the final null-terminator */
 803                 *(PWSTR)CurrentVersion = UNICODE_NULL;
 804                 TotalLength += sizeof(UNICODE_NULL);
 805
 806                 /* Write the BIOS Version to the registry */
 807                 RtlInitUnicodeString(&ValueName, L"VideoBiosVersion");
 808                 Status = NtSetValueKey(SystemHandle,
 809                                        &ValueName,
 810                                        0,
 811                                        REG_MULTI_SZ,
 812                                        BiosVersion,
 813                                        TotalLength);
 814
 815                 /* ROS: Save a copy for bugzilla reporting */
 816                 RtlCreateUnicodeString(&KeRosVideoBiosVersion, (PWCH)BiosVersion);
 817             }
 818         }
 819
 820         /* Unmap the section */
 821         ZwUnmapViewOfSection(NtCurrentProcess(), BaseAddress);
 822     }
 823
 824     /* Close the section */
 825     ZwClose(SectionHandle);
 826
 827     /* Free the BIOS version string buffer */
 828     if (BiosVersion) ExFreePoolWithTag(BiosVersion, TAG_CM);
 829
 830 Quickie:
 831     /* Close the procesor handle */
 832     NtClose(KeyHandle);
 833     return STATUS_SUCCESS;
 834 }