diff options
Diffstat (limited to 'IntelFrameworkModulePkg/Csm/LegacyBiosDxe/LegacyBios.c')
| -rw-r--r-- | IntelFrameworkModulePkg/Csm/LegacyBiosDxe/LegacyBios.c | 1007 |
1 files changed, 1007 insertions, 0 deletions
diff --git a/IntelFrameworkModulePkg/Csm/LegacyBiosDxe/LegacyBios.c b/IntelFrameworkModulePkg/Csm/LegacyBiosDxe/LegacyBios.c new file mode 100644 index 0000000..75add5e --- /dev/null +++ b/IntelFrameworkModulePkg/Csm/LegacyBiosDxe/LegacyBios.c @@ -0,0 +1,1007 @@ +/** @file
+
+Copyright (c) 2006 - 2011, Intel Corporation. All rights reserved.<BR>
+
+This program and the accompanying materials
+are licensed and made available under the terms and conditions
+of the BSD License which accompanies this distribution. The
+full text of the license may be found at
+http://opensource.org/licenses/bsd-license.php
+
+THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+
+**/
+
+#include "LegacyBiosInterface.h"
+
+#define PHYSICAL_ADDRESS_TO_POINTER(Address) ((VOID *) ((UINTN) Address))
+
+//
+// define maximum number of HDD system supports
+//
+#define MAX_HDD_ENTRIES 0x30
+
+//
+// Module Global:
+// Since this driver will only ever produce one instance of the Private Data
+// protocol you are not required to dynamically allocate the PrivateData.
+//
+LEGACY_BIOS_INSTANCE mPrivateData;
+
+//
+// The end of OPROM shadow address
+//
+UINTN mEndOpromShadowAddress = 0;
+
+/**
+ Do an AllocatePages () of type AllocateMaxAddress for EfiBootServicesCode
+ memory.
+
+ @param AllocateType Allocated Legacy Memory Type
+ @param StartPageAddress Start address of range
+ @param Pages Number of pages to allocate
+ @param Result Result of allocation
+
+ @retval EFI_SUCCESS Legacy16 code loaded
+ @retval Other No protocol installed, unload driver.
+
+**/
+EFI_STATUS
+AllocateLegacyMemory (
+ IN EFI_ALLOCATE_TYPE AllocateType,
+ IN EFI_PHYSICAL_ADDRESS StartPageAddress,
+ IN UINTN Pages,
+ OUT EFI_PHYSICAL_ADDRESS *Result
+ )
+{
+ EFI_STATUS Status;
+ EFI_PHYSICAL_ADDRESS MemPage;
+
+ //
+ // Allocate Pages of memory less <= StartPageAddress
+ //
+ MemPage = (EFI_PHYSICAL_ADDRESS) (UINTN) StartPageAddress;
+ Status = gBS->AllocatePages (
+ AllocateType,
+ EfiBootServicesCode,
+ Pages,
+ &MemPage
+ );
+ //
+ // Do not ASSERT on Status error but let caller decide since some cases
+ // memory is already taken but that is ok.
+ //
+ if (!EFI_ERROR (Status)) {
+ *Result = (EFI_PHYSICAL_ADDRESS) (UINTN) MemPage;
+ }
+ //
+ // If reach here the status = EFI_SUCCESS
+ //
+ return Status;
+}
+
+
+/**
+ This function is called when EFI needs to reserve an area in the 0xE0000 or 0xF0000
+ 64 KB blocks.
+
+ Note: inconsistency with the Framework CSM spec. Per the spec, this function may be
+ invoked only once. This limitation is relaxed to allow multiple calls in this implemenation.
+
+ @param This Protocol instance pointer.
+ @param LegacyMemorySize Size of required region
+ @param Region Region to use. 00 = Either 0xE0000 or 0xF0000
+ block Bit0 = 1 0xF0000 block Bit1 = 1 0xE0000
+ block
+ @param Alignment Address alignment. Bit mapped. First non-zero
+ bit from right is alignment.
+ @param LegacyMemoryAddress Region Assigned
+
+ @retval EFI_SUCCESS Region assigned
+ @retval EFI_ACCESS_DENIED Procedure previously invoked
+ @retval Other Region not assigned
+
+**/
+EFI_STATUS
+EFIAPI
+LegacyBiosGetLegacyRegion (
+ IN EFI_LEGACY_BIOS_PROTOCOL *This,
+ IN UINTN LegacyMemorySize,
+ IN UINTN Region,
+ IN UINTN Alignment,
+ OUT VOID **LegacyMemoryAddress
+ )
+{
+
+ LEGACY_BIOS_INSTANCE *Private;
+ EFI_IA32_REGISTER_SET Regs;
+ EFI_STATUS Status;
+ UINT32 Granularity;
+
+ Private = LEGACY_BIOS_INSTANCE_FROM_THIS (This);
+ Private->LegacyRegion->UnLock (Private->LegacyRegion, 0xE0000, 0x20000, &Granularity);
+
+ ZeroMem (&Regs, sizeof (EFI_IA32_REGISTER_SET));
+ Regs.X.AX = Legacy16GetTableAddress;
+ Regs.X.BX = (UINT16) Region;
+ Regs.X.CX = (UINT16) LegacyMemorySize;
+ Regs.X.DX = (UINT16) Alignment;
+ Private->LegacyBios.FarCall86 (
+ &Private->LegacyBios,
+ Private->Legacy16CallSegment,
+ Private->Legacy16CallOffset,
+ &Regs,
+ NULL,
+ 0
+ );
+
+ if (Regs.X.AX == 0) {
+ *LegacyMemoryAddress = (VOID *) (UINTN) ((Regs.X.DS << 4) + Regs.X.BX);
+ Status = EFI_SUCCESS;
+ } else {
+ Status = EFI_OUT_OF_RESOURCES;
+ }
+
+ Private->Cpu->FlushDataCache (Private->Cpu, 0xE0000, 0x20000, EfiCpuFlushTypeWriteBackInvalidate);
+ Private->LegacyRegion->Lock (Private->LegacyRegion, 0xE0000, 0x20000, &Granularity);
+
+ return Status;
+}
+
+
+/**
+ This function is called when copying data to the region assigned by
+ EFI_LEGACY_BIOS_PROTOCOL.GetLegacyRegion().
+
+ @param This Protocol instance pointer.
+ @param LegacyMemorySize Size of data to copy
+ @param LegacyMemoryAddress Legacy Region destination address Note: must
+ be in region assigned by
+ LegacyBiosGetLegacyRegion
+ @param LegacyMemorySourceAddress Source of data
+
+ @retval EFI_SUCCESS The data was copied successfully.
+ @retval EFI_ACCESS_DENIED Either the starting or ending address is out of bounds.
+**/
+EFI_STATUS
+EFIAPI
+LegacyBiosCopyLegacyRegion (
+ IN EFI_LEGACY_BIOS_PROTOCOL *This,
+ IN UINTN LegacyMemorySize,
+ IN VOID *LegacyMemoryAddress,
+ IN VOID *LegacyMemorySourceAddress
+ )
+{
+
+ LEGACY_BIOS_INSTANCE *Private;
+ UINT32 Granularity;
+
+ if ((LegacyMemoryAddress < (VOID *)(UINTN)0xE0000 ) ||
+ ((UINTN) LegacyMemoryAddress + LegacyMemorySize > (UINTN) 0x100000)
+ ) {
+ return EFI_ACCESS_DENIED;
+ }
+ //
+ // There is no protection from writes over lapping if this function is
+ // called multiple times.
+ //
+ Private = LEGACY_BIOS_INSTANCE_FROM_THIS (This);
+ Private->LegacyRegion->UnLock (Private->LegacyRegion, 0xE0000, 0x20000, &Granularity);
+ CopyMem (LegacyMemoryAddress, LegacyMemorySourceAddress, LegacyMemorySize);
+
+ Private->Cpu->FlushDataCache (Private->Cpu, 0xE0000, 0x20000, EfiCpuFlushTypeWriteBackInvalidate);
+ Private->LegacyRegion->Lock (Private->LegacyRegion, 0xE0000, 0x20000, &Granularity);
+
+ return EFI_SUCCESS;
+}
+
+
+/**
+ Find Legacy16 BIOS image in the FLASH device and shadow it into memory. Find
+ the $EFI table in the shadow area. Thunk into the Legacy16 code after it had
+ been shadowed.
+
+ @param Private Legacy BIOS context data
+
+ @retval EFI_SUCCESS Legacy16 code loaded
+ @retval Other No protocol installed, unload driver.
+
+**/
+EFI_STATUS
+ShadowAndStartLegacy16 (
+ IN LEGACY_BIOS_INSTANCE *Private
+ )
+{
+ EFI_STATUS Status;
+ UINT8 *Ptr;
+ UINT8 *PtrEnd;
+ BOOLEAN Done;
+ EFI_COMPATIBILITY16_TABLE *Table;
+ UINT8 CheckSum;
+ EFI_IA32_REGISTER_SET Regs;
+ EFI_TO_COMPATIBILITY16_INIT_TABLE *EfiToLegacy16InitTable;
+ EFI_TO_COMPATIBILITY16_BOOT_TABLE *EfiToLegacy16BootTable;
+ VOID *LegacyBiosImage;
+ UINTN LegacyBiosImageSize;
+ UINTN E820Size;
+ UINT32 *ClearPtr;
+ BBS_TABLE *BbsTable;
+ LEGACY_EFI_HDD_TABLE *LegacyEfiHddTable;
+ UINTN Index;
+ UINT32 TpmPointer;
+ VOID *TpmBinaryImage;
+ UINTN TpmBinaryImageSize;
+ UINTN Location;
+ UINTN Alignment;
+ UINTN TempData;
+ EFI_PHYSICAL_ADDRESS Address;
+ UINT16 OldMask;
+ UINT16 NewMask;
+ UINT32 Granularity;
+ EFI_GCD_MEMORY_SPACE_DESCRIPTOR Descriptor;
+
+ Location = 0;
+ Alignment = 0;
+
+ //
+ // we allocate the C/D/E/F segment as RT code so no one will use it any more.
+ //
+ Address = 0xC0000;
+ gDS->GetMemorySpaceDescriptor (Address, &Descriptor);
+ if (Descriptor.GcdMemoryType == EfiGcdMemoryTypeSystemMemory) {
+ //
+ // If it is already reserved, we should be safe, or else we allocate it.
+ //
+ Status = gBS->AllocatePages (
+ AllocateAddress,
+ EfiRuntimeServicesCode,
+ 0x40000/EFI_PAGE_SIZE,
+ &Address
+ );
+ if (EFI_ERROR (Status)) {
+ //
+ // Bugbug: need to figure out whether C/D/E/F segment should be marked as reserved memory.
+ //
+ DEBUG ((DEBUG_ERROR, "Failed to allocate the C/D/E/F segment Status = %r", Status));
+ }
+ }
+
+ //
+ // start testtest
+ // GetTimerValue (&Ticker);
+ //
+ // gRT->SetVariable (L"StartLegacy",
+ // &gEfiGlobalVariableGuid,
+ // EFI_VARIABLE_NON_VOLATILE | EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS,
+ // sizeof (UINT64),
+ // (VOID *)&Ticker
+ // );
+ // end testtest
+ //
+ EfiToLegacy16BootTable = &Private->IntThunk->EfiToLegacy16BootTable;
+ Status = Private->LegacyBiosPlatform->GetPlatformInfo (
+ Private->LegacyBiosPlatform,
+ EfiGetPlatformBinarySystemRom,
+ &LegacyBiosImage,
+ &LegacyBiosImageSize,
+ &Location,
+ &Alignment,
+ 0,
+ 0
+ );
+ if (EFI_ERROR (Status)) {
+ return Status;
+ }
+
+ Private->BiosStart = (UINT32) (0x100000 - LegacyBiosImageSize);
+ Private->OptionRom = 0xc0000;
+ Private->LegacyBiosImageSize = (UINT32) LegacyBiosImageSize;
+
+ //
+ // Can only shadow into memory allocated for legacy useage.
+ //
+ ASSERT (Private->BiosStart > Private->OptionRom);
+
+ //
+ // Shadow Legacy BIOS. Turn on memory and copy image
+ //
+ Private->LegacyRegion->UnLock (Private->LegacyRegion, 0xc0000, 0x40000, &Granularity);
+
+ ClearPtr = (VOID *) ((UINTN) 0xc0000);
+
+ //
+ // Initialize region from 0xc0000 to start of BIOS to all ffs. This allows unused
+ // regions to be used by EMM386 etc.
+ //
+ SetMem ((VOID *) ClearPtr, (UINTN) (0x40000 - LegacyBiosImageSize), 0xff);
+
+ TempData = Private->BiosStart;
+
+ CopyMem (
+ (VOID *) TempData,
+ LegacyBiosImage,
+ (UINTN) LegacyBiosImageSize
+ );
+
+ Private->Cpu->FlushDataCache (Private->Cpu, 0xc0000, 0x40000, EfiCpuFlushTypeWriteBackInvalidate);
+
+ //
+ // Search for Legacy16 table in Shadowed ROM
+ //
+ Done = FALSE;
+ Table = NULL;
+ for (Ptr = (UINT8 *) TempData; Ptr < (UINT8 *) ((UINTN) 0x100000) && !Done; Ptr += 0x10) {
+ if (*(UINT32 *) Ptr == SIGNATURE_32 ('I', 'F', 'E', '$')) {
+ Table = (EFI_COMPATIBILITY16_TABLE *) Ptr;
+ PtrEnd = Ptr + Table->TableLength;
+ for (CheckSum = 0; Ptr < PtrEnd; Ptr++) {
+ CheckSum = (UINT8) (CheckSum +*Ptr);
+ }
+
+ Done = TRUE;
+ }
+ }
+
+ if (Table == NULL) {
+ DEBUG ((EFI_D_ERROR, "No Legacy16 table found\n"));
+ return EFI_NOT_FOUND;
+ }
+
+ if (!Done) {
+ //
+ // Legacy16 table header checksum error.
+ //
+ DEBUG ((EFI_D_ERROR, "Legacy16 table found with bad talbe header checksum\n"));
+ }
+
+ //
+ // Remember location of the Legacy16 table
+ //
+ Private->Legacy16Table = Table;
+ Private->Legacy16CallSegment = Table->Compatibility16CallSegment;
+ Private->Legacy16CallOffset = Table->Compatibility16CallOffset;
+ EfiToLegacy16InitTable = &Private->IntThunk->EfiToLegacy16InitTable;
+ Private->Legacy16InitPtr = EfiToLegacy16InitTable;
+ Private->Legacy16BootPtr = &Private->IntThunk->EfiToLegacy16BootTable;
+ Private->InternalIrqRoutingTable = NULL;
+ Private->NumberIrqRoutingEntries = 0;
+ Private->BbsTablePtr = NULL;
+ Private->LegacyEfiHddTable = NULL;
+ Private->DiskEnd = 0;
+ Private->Disk4075 = 0;
+ Private->HddTablePtr = &Private->IntThunk->EfiToLegacy16BootTable.HddInfo;
+ Private->NumberHddControllers = MAX_IDE_CONTROLLER;
+ Private->Dump[0] = 'D';
+ Private->Dump[1] = 'U';
+ Private->Dump[2] = 'M';
+ Private->Dump[3] = 'P';
+
+ ZeroMem (
+ Private->Legacy16BootPtr,
+ sizeof (EFI_TO_COMPATIBILITY16_BOOT_TABLE)
+ );
+
+ //
+ // Store away a copy of the EFI System Table
+ //
+ Table->EfiSystemTable = (UINT32) (UINTN) gST;
+
+ //
+ // Get the end of OPROM shadow address
+ //
+ Status = Private->LegacyBiosPlatform->GetPlatformInfo (
+ Private->LegacyBiosPlatform,
+ EfiGetPlatformEndOpromShadowAddr,
+ NULL,
+ NULL,
+ &mEndOpromShadowAddress,
+ NULL,
+ 0,
+ 0
+ );
+ if (EFI_ERROR (Status)) {
+ mEndOpromShadowAddress = 0xDFFFF;
+ }
+
+ //
+ // IPF CSM integration -Bug
+ //
+ // Construct the Legacy16 boot memory map. This sets up number of
+ // E820 entries.
+ //
+ LegacyBiosBuildE820 (Private, &E820Size);
+ //
+ // Initialize BDA and EBDA standard values needed to load Legacy16 code
+ //
+ LegacyBiosInitBda (Private);
+ LegacyBiosInitCmos (Private);
+
+ //
+ // All legacy interrupt should be masked when do initialization work from legacy 16 code.
+ //
+ Private->Legacy8259->GetMask(Private->Legacy8259, &OldMask, NULL, NULL, NULL);
+ NewMask = 0xFFFF;
+ Private->Legacy8259->SetMask(Private->Legacy8259, &NewMask, NULL, NULL, NULL);
+
+ //
+ // Call into Legacy16 code to do an INIT
+ //
+ ZeroMem (&Regs, sizeof (EFI_IA32_REGISTER_SET));
+ Regs.X.AX = Legacy16InitializeYourself;
+ Regs.X.ES = EFI_SEGMENT (*((UINT32 *) &EfiToLegacy16InitTable));
+ Regs.X.BX = EFI_OFFSET (*((UINT32 *) &EfiToLegacy16InitTable));
+
+ Private->LegacyBios.FarCall86 (
+ &Private->LegacyBios,
+ Table->Compatibility16CallSegment,
+ Table->Compatibility16CallOffset,
+ &Regs,
+ NULL,
+ 0
+ );
+
+ //
+ // Restore original legacy interrupt mask value
+ //
+ Private->Legacy8259->SetMask(Private->Legacy8259, &OldMask, NULL, NULL, NULL);
+
+ if (Regs.X.AX != 0) {
+ return EFI_DEVICE_ERROR;
+ }
+
+ //
+ // start testtest
+ // GetTimerValue (&Ticker);
+ //
+ // gRT->SetVariable (L"BackFromInitYourself",
+ // &gEfiGlobalVariableGuid,
+ // EFI_VARIABLE_NON_VOLATILE | EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS,
+ // sizeof (UINT64),
+ // (VOID *)&Ticker
+ // );
+ // end testtest
+ //
+ // Copy E820 table after InitializeYourself is completed
+ //
+ ZeroMem (&Regs, sizeof (EFI_IA32_REGISTER_SET));
+ Regs.X.AX = Legacy16GetTableAddress;
+ Regs.X.CX = (UINT16) E820Size;
+ Regs.X.DX = 1;
+ Private->LegacyBios.FarCall86 (
+ &Private->LegacyBios,
+ Table->Compatibility16CallSegment,
+ Table->Compatibility16CallOffset,
+ &Regs,
+ NULL,
+ 0
+ );
+
+ Table->E820Pointer = (UINT32) (Regs.X.DS * 16 + Regs.X.BX);
+ Table->E820Length = (UINT32) E820Size;
+ if (Regs.X.AX != 0) {
+ DEBUG ((EFI_D_ERROR, "Legacy16 E820 length insufficient\n"));
+ } else {
+ TempData = Table->E820Pointer;
+ CopyMem ((VOID *) TempData, Private->E820Table, E820Size);
+ }
+ //
+ // Get PnPInstallationCheck Info.
+ //
+ Private->PnPInstallationCheckSegment = Table->PnPInstallationCheckSegment;
+ Private->PnPInstallationCheckOffset = Table->PnPInstallationCheckOffset;
+
+ //
+ // Check if PCI Express is supported. If yes, Save base address.
+ //
+ Status = Private->LegacyBiosPlatform->GetPlatformInfo (
+ Private->LegacyBiosPlatform,
+ EfiGetPlatformPciExpressBase,
+ NULL,
+ NULL,
+ &Location,
+ &Alignment,
+ 0,
+ 0
+ );
+ if (!EFI_ERROR (Status)) {
+ Private->Legacy16Table->PciExpressBase = (UINT32)Location;
+ Location = 0;
+ }
+ //
+ // Check if TPM is supported. If yes get a region in E0000,F0000 to copy it
+ // into, copy it and update pointer to binary image. This needs to be
+ // done prior to any OPROM for security purposes.
+ //
+ Status = Private->LegacyBiosPlatform->GetPlatformInfo (
+ Private->LegacyBiosPlatform,
+ EfiGetPlatformBinaryTpmBinary,
+ &TpmBinaryImage,
+ &TpmBinaryImageSize,
+ &Location,
+ &Alignment,
+ 0,
+ 0
+ );
+ if (!EFI_ERROR (Status)) {
+
+ ZeroMem (&Regs, sizeof (EFI_IA32_REGISTER_SET));
+ Regs.X.AX = Legacy16GetTableAddress;
+ Regs.X.CX = (UINT16) TpmBinaryImageSize;
+ Regs.X.DX = 1;
+ Private->LegacyBios.FarCall86 (
+ &Private->LegacyBios,
+ Table->Compatibility16CallSegment,
+ Table->Compatibility16CallOffset,
+ &Regs,
+ NULL,
+ 0
+ );
+
+ TpmPointer = (UINT32) (Regs.X.DS * 16 + Regs.X.BX);
+ if (Regs.X.AX != 0) {
+ DEBUG ((EFI_D_ERROR, "TPM cannot be loaded\n"));
+ } else {
+ CopyMem ((VOID *) (UINTN)TpmPointer, TpmBinaryImage, TpmBinaryImageSize);
+ Table->TpmSegment = Regs.X.DS;
+ Table->TpmOffset = Regs.X.BX;
+
+ }
+ }
+ //
+ // Lock the Legacy BIOS region
+ //
+ Private->Cpu->FlushDataCache (Private->Cpu, Private->BiosStart, (UINT32) LegacyBiosImageSize, EfiCpuFlushTypeWriteBackInvalidate);
+ Private->LegacyRegion->Lock (Private->LegacyRegion, Private->BiosStart, (UINT32) LegacyBiosImageSize, &Granularity);
+
+ //
+ // Get the BbsTable from LOW_MEMORY_THUNK
+ //
+ BbsTable = (BBS_TABLE *)(UINTN)Private->IntThunk->BbsTable;
+ ZeroMem ((VOID *)BbsTable, sizeof (Private->IntThunk->BbsTable));
+
+ EfiToLegacy16BootTable->BbsTable = (UINT32)(UINTN)BbsTable;
+ Private->BbsTablePtr = (VOID *) BbsTable;
+ //
+ // Skip Floppy and possible onboard IDE drives
+ //
+ EfiToLegacy16BootTable->NumberBbsEntries = 1 + 2 * MAX_IDE_CONTROLLER;
+
+ for (Index = 0; Index < (sizeof (Private->IntThunk->BbsTable) / sizeof (BBS_TABLE)); Index++) {
+ BbsTable[Index].BootPriority = BBS_IGNORE_ENTRY;
+ }
+ //
+ // Allocate space for Legacy HDD table
+ //
+ LegacyEfiHddTable = (LEGACY_EFI_HDD_TABLE *) AllocateZeroPool ((UINTN) MAX_HDD_ENTRIES * sizeof (LEGACY_EFI_HDD_TABLE));
+ ASSERT (LegacyEfiHddTable);
+
+ Private->LegacyEfiHddTable = LegacyEfiHddTable;
+ Private->LegacyEfiHddTableIndex = 0x00;
+
+ //
+ // start testtest
+ // GetTimerValue (&Ticker);
+ //
+ // gRT->SetVariable (L"EndOfLoadFv",
+ // &gEfiGlobalVariableGuid,
+ // EFI_VARIABLE_NON_VOLATILE | EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS,
+ // sizeof (UINT64),
+ // (VOID *)&Ticker
+ // );
+ // end testtest
+ //
+ return EFI_SUCCESS;
+}
+
+/**
+ Shadow all legacy16 OPROMs that haven't been shadowed.
+ Warning: Use this with caution. This routine disconnects all EFI
+ drivers. If used externally then caller must re-connect EFI
+ drivers.
+
+ @param This Protocol instance pointer.
+
+ @retval EFI_SUCCESS OPROMs shadowed
+
+**/
+EFI_STATUS
+EFIAPI
+LegacyBiosShadowAllLegacyOproms (
+ IN EFI_LEGACY_BIOS_PROTOCOL *This
+ )
+{
+ LEGACY_BIOS_INSTANCE *Private;
+
+ //
+ // EFI_LEGACY_BIOS_PLATFORM_PROTOCOL *LegacyBiosPlatform;
+ // EFI_LEGACY16_TABLE *Legacy16Table;
+ //
+ Private = LEGACY_BIOS_INSTANCE_FROM_THIS (This);
+
+ //
+ // LegacyBiosPlatform = Private->LegacyBiosPlatform;
+ // Legacy16Table = Private->Legacy16Table;
+ //
+ // Shadow PCI ROMs. We must do this near the end since this will kick
+ // of Native EFI drivers that may be needed to collect info for Legacy16
+ //
+ // WARNING: PciIo is gone after this call.
+ //
+ PciProgramAllInterruptLineRegisters (Private);
+
+ PciShadowRoms (Private);
+
+ //
+ // Shadow PXE base code, BIS etc.
+ //
+ // LegacyBiosPlatform->ShadowServiceRoms (LegacyBiosPlatform,
+ // &Private->OptionRom,
+ // Legacy16Table);
+ //
+ return EFI_SUCCESS;
+}
+
+/**
+ Get the PCI BIOS interface version.
+
+ @param Private Driver private data.
+
+ @return The PCI interface version number in Binary Coded Decimal (BCD) format.
+ E.g.: 0x0210 indicates 2.10, 0x0300 indicates 3.00
+
+**/
+UINT16
+GetPciInterfaceVersion (
+ IN LEGACY_BIOS_INSTANCE *Private
+ )
+{
+ EFI_IA32_REGISTER_SET Reg;
+ BOOLEAN ThunkFailed;
+ UINT16 PciInterfaceVersion;
+
+ PciInterfaceVersion = 0;
+
+ Reg.X.AX = 0xB101;
+ Reg.E.EDI = 0;
+
+ ThunkFailed = Private->LegacyBios.Int86 (&Private->LegacyBios, 0x1A, &Reg);
+ if (!ThunkFailed) {
+ //
+ // From PCI Firmware 3.0 Specification:
+ // If the CARRY FLAG [CF] is cleared and AH is set to 00h, it is still necessary to examine the
+ // contents of [EDX] for the presence of the string "PCI" + (trailing space) to fully validate the
+ // presence of the PCI function set. [BX] will further indicate the version level, with enough
+ // granularity to allow for incremental changes in the code that don't affect the function interface.
+ // Version numbers are stored as Binary Coded Decimal (BCD) values. For example, Version 2.10
+ // would be returned as a 02h in the [BH] registers and 10h in the [BL] registers.
+ //
+ if ((Reg.X.Flags.CF == 0) && (Reg.H.AH == 0) && (Reg.E.EDX == SIGNATURE_32 ('P', 'C', 'I', ' '))) {
+ PciInterfaceVersion = Reg.X.BX;
+ }
+ }
+ return PciInterfaceVersion;
+}
+
+/**
+ Install Driver to produce Legacy BIOS protocol.
+
+ @param ImageHandle Handle of driver image.
+ @param SystemTable Pointer to system table.
+
+ @retval EFI_SUCCESS Legacy BIOS protocol installed
+ @retval No protocol installed, unload driver.
+
+**/
+EFI_STATUS
+EFIAPI
+LegacyBiosInstall (
+ IN EFI_HANDLE ImageHandle,
+ IN EFI_SYSTEM_TABLE *SystemTable
+ )
+{
+ EFI_STATUS Status;
+ LEGACY_BIOS_INSTANCE *Private;
+ EFI_TO_COMPATIBILITY16_INIT_TABLE *EfiToLegacy16InitTable;
+ EFI_PHYSICAL_ADDRESS MemoryAddress;
+ VOID *MemoryPtr;
+ EFI_PHYSICAL_ADDRESS MemoryAddressUnder1MB;
+ UINTN Index;
+ UINT32 *BaseVectorMaster;
+ EFI_PHYSICAL_ADDRESS StartAddress;
+ UINT32 *ClearPtr;
+ EFI_PHYSICAL_ADDRESS MemStart;
+ UINT32 IntRedirCode;
+ UINT32 Granularity;
+ BOOLEAN DecodeOn;
+ UINT32 MemorySize;
+ EFI_GCD_MEMORY_SPACE_DESCRIPTOR Descriptor;
+ UINT64 Length;
+
+ //
+ // Load this driver's image to memory
+ //
+ Status = RelocateImageUnder4GIfNeeded (ImageHandle, SystemTable);
+ if (EFI_ERROR (Status)) {
+ return Status;
+ }
+
+ Private = &mPrivateData;
+ ZeroMem (Private, sizeof (LEGACY_BIOS_INSTANCE));
+
+ //
+ // Grab a copy of all the protocols we depend on. Any error would
+ // be a dispatcher bug!.
+ //
+ Status = gBS->LocateProtocol (&gEfiCpuArchProtocolGuid, NULL, (VOID **) &Private->Cpu);
+ ASSERT_EFI_ERROR (Status);
+
+ Status = gBS->LocateProtocol (&gEfiLegacyRegion2ProtocolGuid, NULL, (VOID **) &Private->LegacyRegion);
+ ASSERT_EFI_ERROR (Status);
+
+ Status = gBS->LocateProtocol (&gEfiLegacyBiosPlatformProtocolGuid, NULL, (VOID **) &Private->LegacyBiosPlatform);
+ ASSERT_EFI_ERROR (Status);
+
+ Status = gBS->LocateProtocol (&gEfiLegacy8259ProtocolGuid, NULL, (VOID **) &Private->Legacy8259);
+ ASSERT_EFI_ERROR (Status);
+
+ Status = gBS->LocateProtocol (&gEfiLegacyInterruptProtocolGuid, NULL, (VOID **) &Private->LegacyInterrupt);
+ ASSERT_EFI_ERROR (Status);
+
+ //
+ // Locate Memory Test Protocol if exists
+ //
+ Status = gBS->LocateProtocol (
+ &gEfiGenericMemTestProtocolGuid,
+ NULL,
+ (VOID **) &Private->GenericMemoryTest
+ );
+ ASSERT_EFI_ERROR (Status);
+
+ //
+ // Make sure all memory from 0-640K is tested
+ //
+ for (StartAddress = 0; StartAddress < 0xa0000; ) {
+ gDS->GetMemorySpaceDescriptor (StartAddress, &Descriptor);
+ if (Descriptor.GcdMemoryType != EfiGcdMemoryTypeReserved) {
+ StartAddress = Descriptor.BaseAddress + Descriptor.Length;
+ continue;
+ }
+ Length = MIN (Descriptor.Length, 0xa0000 - StartAddress);
+ Private->GenericMemoryTest->CompatibleRangeTest (
+ Private->GenericMemoryTest,
+ StartAddress,
+ Length
+ );
+ StartAddress = StartAddress + Length;
+ }
+ //
+ // Make sure all memory from 1MB to 16MB is tested and added to memory map
+ //
+ for (StartAddress = BASE_1MB; StartAddress < BASE_16MB; ) {
+ gDS->GetMemorySpaceDescriptor (StartAddress, &Descriptor);
+ if (Descriptor.GcdMemoryType != EfiGcdMemoryTypeReserved) {
+ StartAddress = Descriptor.BaseAddress + Descriptor.Length;
+ continue;
+ }
+ Length = MIN (Descriptor.Length, BASE_16MB - StartAddress);
+ Private->GenericMemoryTest->CompatibleRangeTest (
+ Private->GenericMemoryTest,
+ StartAddress,
+ Length
+ );
+ StartAddress = StartAddress + Length;
+ }
+
+ Private->Signature = LEGACY_BIOS_INSTANCE_SIGNATURE;
+
+ Private->LegacyBios.Int86 = LegacyBiosInt86;
+ Private->LegacyBios.FarCall86 = LegacyBiosFarCall86;
+ Private->LegacyBios.CheckPciRom = LegacyBiosCheckPciRom;
+ Private->LegacyBios.InstallPciRom = LegacyBiosInstallPciRom;
+ Private->LegacyBios.LegacyBoot = LegacyBiosLegacyBoot;
+ Private->LegacyBios.UpdateKeyboardLedStatus = LegacyBiosUpdateKeyboardLedStatus;
+ Private->LegacyBios.GetBbsInfo = LegacyBiosGetBbsInfo;
+ Private->LegacyBios.ShadowAllLegacyOproms = LegacyBiosShadowAllLegacyOproms;
+ Private->LegacyBios.PrepareToBootEfi = LegacyBiosPrepareToBootEfi;
+ Private->LegacyBios.GetLegacyRegion = LegacyBiosGetLegacyRegion;
+ Private->LegacyBios.CopyLegacyRegion = LegacyBiosCopyLegacyRegion;
+ Private->LegacyBios.BootUnconventionalDevice = LegacyBiosBootUnconventionalDevice;
+
+ Private->ImageHandle = ImageHandle;
+
+ //
+ // Enable read attribute of legacy region.
+ //
+ DecodeOn = TRUE;
+ Private->LegacyRegion->Decode (
+ Private->LegacyRegion,
+ 0xc0000,
+ 0x40000,
+ &Granularity,
+ &DecodeOn
+ );
+ //
+ // Set Cachebility for legacy region
+ // BUGBUG: Comments about this legacy region cacheability setting
+ // This setting will make D865GCHProduction CSM Unhappy
+ //
+ if (PcdGetBool (PcdLegacyBiosCacheLegacyRegion)) {
+ gDS->SetMemorySpaceAttributes (
+ 0x0,
+ 0xA0000,
+ EFI_MEMORY_WB
+ );
+ gDS->SetMemorySpaceAttributes (
+ 0xc0000,
+ 0x40000,
+ EFI_MEMORY_WB
+ );
+ }
+
+ gDS->SetMemorySpaceAttributes (
+ 0xA0000,
+ 0x20000,
+ EFI_MEMORY_UC
+ );
+
+ //
+ // Allocate 0 - 4K for real mode interupt vectors and BDA.
+ //
+ AllocateLegacyMemory (
+ AllocateAddress,
+ 0,
+ 1,
+ &MemoryAddress
+ );
+ ASSERT (MemoryAddress == 0x000000000);
+
+ ClearPtr = (VOID *) ((UINTN) 0x0000);
+
+ //
+ // Initialize region from 0x0000 to 4k. This initializes interrupt vector
+ // range.
+ //
+ gBS->SetMem ((VOID *) ClearPtr, 0x400, INITIAL_VALUE_BELOW_1K);
+ ZeroMem ((VOID *) ((UINTN)ClearPtr + 0x400), 0xC00);
+
+ //
+ // Allocate pages for OPROM usage
+ //
+ MemorySize = PcdGet32 (PcdEbdaReservedMemorySize);
+ ASSERT ((MemorySize & 0xFFF) == 0);
+
+ Status = AllocateLegacyMemory (
+ AllocateAddress,
+ CONVENTIONAL_MEMORY_TOP - MemorySize,
+ EFI_SIZE_TO_PAGES (MemorySize),
+ &MemoryAddress
+ );
+ ASSERT_EFI_ERROR (Status);
+
+ ZeroMem ((VOID *) ((UINTN) MemoryAddress), MemorySize);
+
+ //
+ // Allocate all 32k chunks from 0x60000 ~ 0x88000 for Legacy OPROMs that
+ // don't use PMM but look for zeroed memory. Note that various non-BBS
+ // SCSIs expect different areas to be free
+ //
+ for (MemStart = 0x60000; MemStart < 0x88000; MemStart += 0x1000) {
+ Status = AllocateLegacyMemory (
+ AllocateAddress,
+ MemStart,
+ 1,
+ &MemoryAddress
+ );
+ if (!EFI_ERROR (Status)) {
+ MemoryPtr = (VOID *) ((UINTN) MemoryAddress);
+ ZeroMem (MemoryPtr, 0x1000);
+ } else {
+ DEBUG ((EFI_D_ERROR, "WARNING: Allocate legacy memory fail for SCSI card - %x\n", MemStart));
+ }
+ }
+
+ //
+ // Allocate a 64k area (16 4k pages) for 16-bit code for scratch pad and zero it out
+ //
+ Status = AllocateLegacyMemory (
+ AllocateMaxAddress,
+ CONVENTIONAL_MEMORY_TOP,
+ 16,
+ &MemoryAddressUnder1MB
+ );
+ ASSERT_EFI_ERROR (Status);
+
+ ZeroMem ((VOID *) ((UINTN) MemoryAddressUnder1MB), 0x10000);
+
+ //
+ // Allocate space for thunker and Init Thunker
+ //
+ Status = AllocateLegacyMemory (
+ AllocateMaxAddress,
+ CONVENTIONAL_MEMORY_TOP,
+ (sizeof (LOW_MEMORY_THUNK) / EFI_PAGE_SIZE) + 2,
+ &MemoryAddress
+ );
+ ASSERT_EFI_ERROR (Status);
+ Private->IntThunk = (LOW_MEMORY_THUNK *) (UINTN) MemoryAddress;
+ EfiToLegacy16InitTable = &Private->IntThunk->EfiToLegacy16InitTable;
+ EfiToLegacy16InitTable->ThunkStart = (UINT32) (EFI_PHYSICAL_ADDRESS) (UINTN) MemoryAddress;
+ EfiToLegacy16InitTable->ThunkSizeInBytes = (UINT32) (sizeof (LOW_MEMORY_THUNK));
+
+ Status = LegacyBiosInitializeThunk (Private);
+ ASSERT_EFI_ERROR (Status);
+
+ //
+ // Init the legacy memory map in memory < 1 MB.
+ //
+ EfiToLegacy16InitTable->BiosLessThan1MB = (UINT32) MemoryAddressUnder1MB;
+ EfiToLegacy16InitTable->LowPmmMemory = (UINT32) MemoryAddressUnder1MB;
+ EfiToLegacy16InitTable->LowPmmMemorySizeInBytes = 0x10000;
+
+ //
+ // Allocate 4 MB of PMM Memory under 16 MB
+ //
+ Status = AllocateLegacyMemory (
+ AllocateMaxAddress,
+ 0x1000000,
+ 0x400,
+ &MemoryAddress
+ );
+ if (!EFI_ERROR (Status)) {
+ EfiToLegacy16InitTable->HiPmmMemory = (UINT32) (EFI_PHYSICAL_ADDRESS) (UINTN) MemoryAddress;
+ EfiToLegacy16InitTable->HiPmmMemorySizeInBytes = PMM_MEMORY_SIZE;
+ }
+
+ //
+ // ShutdownAPs();
+ //
+ // Start the Legacy BIOS;
+ //
+ Status = ShadowAndStartLegacy16 (Private);
+ if (EFI_ERROR (Status)) {
+ return Status;
+ }
+ //
+ // Initialize interrupt redirection code and entries;
+ // IDT Vectors 0x68-0x6f must be redirected to IDT Vectors 0x08-0x0f.
+ //
+ CopyMem (
+ Private->IntThunk->InterruptRedirectionCode,
+ (VOID *) (UINTN) InterruptRedirectionTemplate,
+ sizeof (Private->IntThunk->InterruptRedirectionCode)
+ );
+
+ //
+ // Save Unexpected interrupt vector so can restore it just prior to boot
+ //
+ BaseVectorMaster = (UINT32 *) (sizeof (UINT32) * PROTECTED_MODE_BASE_VECTOR_MASTER);
+ Private->BiosUnexpectedInt = BaseVectorMaster[0];
+ IntRedirCode = (UINT32) (UINTN) Private->IntThunk->InterruptRedirectionCode;
+ for (Index = 0; Index < 8; Index++) {
+ BaseVectorMaster[Index] = (EFI_SEGMENT (IntRedirCode + Index * 4) << 16) | EFI_OFFSET (IntRedirCode + Index * 4);
+ }
+ //
+ // Save EFI value
+ //
+ Private->ThunkSeg = (UINT16) (EFI_SEGMENT (IntRedirCode));
+
+ //
+ // Make a new handle and install the protocol
+ //
+ Private->Handle = NULL;
+ Status = gBS->InstallProtocolInterface (
+ &Private->Handle,
+ &gEfiLegacyBiosProtocolGuid,
+ EFI_NATIVE_INTERFACE,
+ &Private->LegacyBios
+ );
+ Private->Csm16PciInterfaceVersion = GetPciInterfaceVersion (Private);
+
+ DEBUG ((EFI_D_INFO, "CSM16 PCI BIOS Interface Version: %02x.%02x\n",
+ (UINT8) (Private->Csm16PciInterfaceVersion >> 8),
+ (UINT8) Private->Csm16PciInterfaceVersion
+ ));
+ ASSERT (Private->Csm16PciInterfaceVersion != 0);
+ return Status;
+}
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