diff options
Diffstat (limited to 'OvmfPkg/Csm/LegacyBiosDxe/LegacyBios.c')
| -rw-r--r-- | OvmfPkg/Csm/LegacyBiosDxe/LegacyBios.c | 1227 |
1 files changed, 0 insertions, 1227 deletions
diff --git a/OvmfPkg/Csm/LegacyBiosDxe/LegacyBios.c b/OvmfPkg/Csm/LegacyBiosDxe/LegacyBios.c deleted file mode 100644 index d587b55..0000000 --- a/OvmfPkg/Csm/LegacyBiosDxe/LegacyBios.c +++ /dev/null @@ -1,1227 +0,0 @@ -/** @file
-
-Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>
-
-SPDX-License-Identifier: BSD-2-Clause-Patent
-
-**/
-
-#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 SMBIOS table in EfiRuntimeServicesData memory
-//
-VOID *mRuntimeSmbiosEntryPoint = NULL;
-
-//
-// The SMBIOS table in EfiReservedMemoryType memory
-//
-EFI_PHYSICAL_ADDRESS mReserveSmbiosEntryPoint = 0;
-EFI_PHYSICAL_ADDRESS mStructureTableAddress = 0;
-UINTN mStructureTablePages = 0;
-BOOLEAN mEndOfDxe = FALSE;
-
-/**
- Allocate memory for legacy usage. The memory is executable.
-
- @param AllocateType The type of allocation to perform.
- @param MemoryType The type of memory to allocate.
- @param StartPageAddress Start address of range
- @param Pages Number of pages to allocate
- @param Result Result of allocation
-
- @retval EFI_SUCCESS Legacy memory is allocated successfully.
- @retval Other Legacy memory is not allocated.
-
-**/
-EFI_STATUS
-AllocateLegacyMemory (
- IN EFI_ALLOCATE_TYPE AllocateType,
- IN EFI_MEMORY_TYPE MemoryType,
- IN EFI_PHYSICAL_ADDRESS StartPageAddress,
- IN UINTN Pages,
- OUT EFI_PHYSICAL_ADDRESS *Result
- )
-{
- EFI_STATUS Status;
- EFI_PHYSICAL_ADDRESS MemPage;
- EFI_GCD_MEMORY_SPACE_DESCRIPTOR MemDesc;
-
- //
- // Allocate Pages of memory less <= StartPageAddress
- //
- MemPage = (EFI_PHYSICAL_ADDRESS)(UINTN)StartPageAddress;
- Status = gBS->AllocatePages (
- AllocateType,
- MemoryType,
- 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)) {
- if (MemoryType != EfiBootServicesCode) {
- //
- // Make sure that the buffer can be used to store code.
- //
- Status = gDS->GetMemorySpaceDescriptor (MemPage, &MemDesc);
- if (!EFI_ERROR (Status) && ((MemDesc.Attributes & EFI_MEMORY_XP) != 0)) {
- Status = gDS->SetMemorySpaceAttributes (
- MemPage,
- EFI_PAGES_TO_SIZE (Pages),
- MemDesc.Attributes & (~EFI_MEMORY_XP)
- );
- }
-
- if (EFI_ERROR (Status)) {
- gBS->FreePages (MemPage, Pages);
- }
- }
- }
-
- if (!EFI_ERROR (Status)) {
- *Result = (EFI_PHYSICAL_ADDRESS)(UINTN)MemPage;
- }
-
- 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 implementation.
-
- @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 usage.
- //
- 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 ((DEBUG_ERROR, "No Legacy16 table found\n"));
- return EFI_NOT_FOUND;
- }
-
- if (!Done) {
- //
- // Legacy16 table header checksum error.
- //
- DEBUG ((DEBUG_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;
-
- //
- // 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 ((DEBUG_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 ((DEBUG_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;
-
- //
- // Populate entire table with BBS_IGNORE_ENTRY
- //
- EfiToLegacy16BootTable->NumberBbsEntries = MAX_BBS_ENTRIES;
-
- for (Index = 0; Index < MAX_BBS_ENTRIES; 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;
-}
-
-/**
- Callback function to calculate SMBIOS table size, and allocate memory for SMBIOS table.
- SMBIOS table will be copied into EfiReservedMemoryType memory in legacy boot path.
-
- @param Event Event whose notification function is being invoked.
- @param Context The pointer to the notification function's context,
- which is implementation-dependent.
-
-**/
-VOID
-EFIAPI
-InstallSmbiosEventCallback (
- IN EFI_EVENT Event,
- IN VOID *Context
- )
-{
- EFI_STATUS Status;
- SMBIOS_TABLE_ENTRY_POINT *EntryPointStructure;
-
- //
- // Get SMBIOS table from EFI configuration table
- //
- Status = EfiGetSystemConfigurationTable (
- &gEfiSmbiosTableGuid,
- &mRuntimeSmbiosEntryPoint
- );
- if ((EFI_ERROR (Status)) || (mRuntimeSmbiosEntryPoint == NULL)) {
- return;
- }
-
- EntryPointStructure = (SMBIOS_TABLE_ENTRY_POINT *)mRuntimeSmbiosEntryPoint;
-
- //
- // Allocate memory for SMBIOS Entry Point Structure.
- // CSM framework spec requires SMBIOS table below 4GB in EFI_TO_COMPATIBILITY16_BOOT_TABLE.
- //
- if (mReserveSmbiosEntryPoint == 0) {
- //
- // Entrypoint structure with fixed size is allocated only once.
- //
- mReserveSmbiosEntryPoint = SIZE_4GB - 1;
- Status = gBS->AllocatePages (
- AllocateMaxAddress,
- EfiReservedMemoryType,
- EFI_SIZE_TO_PAGES ((UINTN)(EntryPointStructure->EntryPointLength)),
- &mReserveSmbiosEntryPoint
- );
- if (EFI_ERROR (Status)) {
- mReserveSmbiosEntryPoint = 0;
- return;
- }
-
- DEBUG ((DEBUG_INFO, "Allocate memory for Smbios Entry Point Structure\n"));
- }
-
- if ((mStructureTableAddress != 0) &&
- (mStructureTablePages < EFI_SIZE_TO_PAGES ((UINT32)EntryPointStructure->TableLength)))
- {
- //
- // If original buffer is not enough for the new SMBIOS table, free original buffer and re-allocate
- //
- gBS->FreePages (mStructureTableAddress, mStructureTablePages);
- mStructureTableAddress = 0;
- mStructureTablePages = 0;
- DEBUG ((DEBUG_INFO, "Original size is not enough. Re-allocate the memory.\n"));
- }
-
- if (mStructureTableAddress == 0) {
- //
- // Allocate reserved memory below 4GB.
- // Smbios spec requires the structure table is below 4GB.
- //
- mStructureTableAddress = SIZE_4GB - 1;
- mStructureTablePages = EFI_SIZE_TO_PAGES (EntryPointStructure->TableLength);
- Status = gBS->AllocatePages (
- AllocateMaxAddress,
- EfiReservedMemoryType,
- mStructureTablePages,
- &mStructureTableAddress
- );
- if (EFI_ERROR (Status)) {
- gBS->FreePages (
- mReserveSmbiosEntryPoint,
- EFI_SIZE_TO_PAGES ((UINTN)(EntryPointStructure->EntryPointLength))
- );
- mReserveSmbiosEntryPoint = 0;
- mStructureTableAddress = 0;
- mStructureTablePages = 0;
- return;
- }
-
- DEBUG ((DEBUG_INFO, "Allocate memory for Smbios Structure Table\n"));
- }
-}
-
-/**
- Callback function to toggle EndOfDxe status. NULL pointer detection needs
- this status to decide if it's necessary to change attributes of page 0.
-
- @param Event Event whose notification function is being invoked.
- @param Context The pointer to the notification function's context,
- which is implementation-dependent.
-
-**/
-VOID
-EFIAPI
-ToggleEndOfDxeStatus (
- IN EFI_EVENT Event,
- IN VOID *Context
- )
-{
- mEndOfDxe = TRUE;
- return;
-}
-
-/**
- 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;
- EFI_PHYSICAL_ADDRESS EbdaReservedBaseAddress;
- 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;
- UINT8 *SecureBoot;
- EFI_EVENT InstallSmbiosEvent;
- EFI_EVENT EndOfDxeEvent;
-
- //
- // Load this driver's image to memory
- //
- Status = RelocateImageUnder4GIfNeeded (ImageHandle, SystemTable);
- if (EFI_ERROR (Status)) {
- return Status;
- }
-
- //
- // When UEFI Secure Boot is enabled, CSM module will not start any more.
- //
- SecureBoot = NULL;
- GetEfiGlobalVariable2 (EFI_SECURE_BOOT_MODE_NAME, (VOID **)&SecureBoot, NULL);
- if ((SecureBoot != NULL) && (*SecureBoot == SECURE_BOOT_MODE_ENABLE)) {
- FreePool (SecureBoot);
- return EFI_SECURITY_VIOLATION;
- }
-
- if (SecureBoot != NULL) {
- FreePool (SecureBoot);
- }
-
- 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 (&gEfiTimerArchProtocolGuid, NULL, (VOID **)&Private->Timer);
- 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 interrupt vectors and BDA.
- //
- AllocateLegacyMemory (
- AllocateAddress,
- EfiReservedMemoryType,
- 0,
- 1,
- &MemoryAddress
- );
- ASSERT (MemoryAddress == 0x000000000);
-
- ClearPtr = (VOID *)((UINTN)0x0000);
-
- //
- // Initialize region from 0x0000 to 4k. This initializes interrupt vector
- // range.
- //
- ACCESS_PAGE0_CODE (
- 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,
- EfiReservedMemoryType,
- 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
- // OpROMs expect different areas to be free
- //
- EbdaReservedBaseAddress = MemoryAddress;
- MemoryAddress = PcdGet32 (PcdOpromReservedMemoryBase);
- MemorySize = PcdGet32 (PcdOpromReservedMemorySize);
- //
- // Check if base address and size for reserved memory are 4KB aligned.
- //
- ASSERT ((MemoryAddress & 0xFFF) == 0);
- ASSERT ((MemorySize & 0xFFF) == 0);
- //
- // Check if the reserved memory is below EBDA reserved range.
- //
- ASSERT ((MemoryAddress < EbdaReservedBaseAddress) && ((MemoryAddress + MemorySize - 1) < EbdaReservedBaseAddress));
- for (MemStart = MemoryAddress; MemStart < MemoryAddress + MemorySize; MemStart += 0x1000) {
- Status = AllocateLegacyMemory (
- AllocateAddress,
- EfiBootServicesCode,
- MemStart,
- 1,
- &StartAddress
- );
- if (!EFI_ERROR (Status)) {
- MemoryPtr = (VOID *)((UINTN)StartAddress);
- ZeroMem (MemoryPtr, 0x1000);
- } else {
- DEBUG ((DEBUG_ERROR, "WARNING: Allocate legacy memory fail for SCSI card - %x\n", MemStart));
- }
- }
-
- //
- // Allocate low PMM memory and zero it out
- //
- MemorySize = PcdGet32 (PcdLowPmmMemorySize);
- ASSERT ((MemorySize & 0xFFF) == 0);
- Status = AllocateLegacyMemory (
- AllocateMaxAddress,
- EfiBootServicesCode,
- CONVENTIONAL_MEMORY_TOP,
- EFI_SIZE_TO_PAGES (MemorySize),
- &MemoryAddressUnder1MB
- );
- ASSERT_EFI_ERROR (Status);
-
- ZeroMem ((VOID *)((UINTN)MemoryAddressUnder1MB), MemorySize);
-
- //
- // Allocate space for thunker and Init Thunker
- //
- Status = AllocateLegacyMemory (
- AllocateMaxAddress,
- EfiReservedMemoryType,
- 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 = MemorySize;
-
- MemorySize = PcdGet32 (PcdHighPmmMemorySize);
- ASSERT ((MemorySize & 0xFFF) == 0);
- //
- // Allocate high PMM Memory under 16 MB
- //
- Status = AllocateLegacyMemory (
- AllocateMaxAddress,
- EfiBootServicesCode,
- 0x1000000,
- EFI_SIZE_TO_PAGES (MemorySize),
- &MemoryAddress
- );
- if (EFI_ERROR (Status)) {
- //
- // If it fails, allocate high PMM Memory under 4GB
- //
- Status = AllocateLegacyMemory (
- AllocateMaxAddress,
- EfiBootServicesCode,
- 0xFFFFFFFF,
- EFI_SIZE_TO_PAGES (MemorySize),
- &MemoryAddress
- );
- }
-
- if (!EFI_ERROR (Status)) {
- EfiToLegacy16InitTable->HiPmmMemory = (UINT32)(EFI_PHYSICAL_ADDRESS)(UINTN)MemoryAddress;
- EfiToLegacy16InitTable->HiPmmMemorySizeInBytes = MemorySize;
- }
-
- //
- // 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
- //
- ACCESS_PAGE0_CODE (
- 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));
-
- //
- // Allocate reserved memory for SMBIOS table used in legacy boot if SMBIOS table exists
- //
- InstallSmbiosEventCallback (NULL, NULL);
-
- //
- // Create callback function to update the size of reserved memory after LegacyBiosDxe starts
- //
- Status = gBS->CreateEventEx (
- EVT_NOTIFY_SIGNAL,
- TPL_NOTIFY,
- InstallSmbiosEventCallback,
- NULL,
- &gEfiSmbiosTableGuid,
- &InstallSmbiosEvent
- );
- ASSERT_EFI_ERROR (Status);
-
- //
- // Create callback to update status of EndOfDxe, which is needed by NULL
- // pointer detection
- //
- Status = gBS->CreateEventEx (
- EVT_NOTIFY_SIGNAL,
- TPL_NOTIFY,
- ToggleEndOfDxeStatus,
- NULL,
- &gEfiEndOfDxeEventGroupGuid,
- &EndOfDxeEvent
- );
- ASSERT_EFI_ERROR (Status);
-
- //
- // 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 ((
- DEBUG_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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