diff options
Diffstat (limited to 'Core/EM/TCG2/Common/TCGSmm/TCGSmm.c')
| -rw-r--r-- | Core/EM/TCG2/Common/TCGSmm/TCGSmm.c | 956 |
1 files changed, 956 insertions, 0 deletions
diff --git a/Core/EM/TCG2/Common/TCGSmm/TCGSmm.c b/Core/EM/TCG2/Common/TCGSmm/TCGSmm.c new file mode 100644 index 0000000..5740605 --- /dev/null +++ b/Core/EM/TCG2/Common/TCGSmm/TCGSmm.c @@ -0,0 +1,956 @@ +//************************************************************************* +//************************************************************************* +//** ** +//** (C)Copyright 1985-2010, American Megatrends, Inc. ** +//** ** +//** All Rights Reserved. ** +//** ** +//** 5555 Oakbrook Parkway, Suite 200, Norcross, GA 30093 ** +//** ** +//** Phone: (770)-246-8600 ** +//** ** +//************************************************************************* +//************************************************************************* +//************************************************************************* +// $Header: /Alaska/SOURCE/Modules/TCG2/Common/TCGSmm/TCGSmm.c 2 6/09/14 5:01p Fredericko $ +// +// $Revision: 2 $ +// +// $Date: 6/09/14 5:01p $ +//************************************************************************* +// Revision History +// ---------------- +// $Log: /Alaska/SOURCE/Modules/TCG2/Common/TCGSmm/TCGSmm.c $ +// +// 2 6/09/14 5:01p Fredericko +// Changes for SetVariable vulnerability during Runtime +// +// 1 4/21/14 2:18p Fredericko +// +// 4 3/17/14 3:23p Fredericko +// +// 3 3/14/14 3:53p Fredericko +// +// 2 12/10/13 12:58p Fredericko +// Locate Tree Protocol as well +// +// 1 10/08/13 12:05p Fredericko +// Initial Check-In for Tpm-Next module +// +// 2 8/30/13 11:02p Fredericko +// +// 1 7/10/13 5:57p Fredericko +// [TAG] EIP120969 +// [Category] New Feature +// [Description] TCG (TPM20) +// +// 17 7/31/12 6:27p Fredericko +// [TAG] EIP94589 +// [Category] Improvement +// [Description] Use better variable names in TcgSmm.c +// [Files] TcgSmm.c +// +// 16 5/20/12 2:12p Fredericko +// +// 15 5/09/12 5:31p Fredericko +// Change Port address to support 16bit port addresses. Some Chipsets +// require this. +// +// 14 3/19/12 6:37p Fredericko +// [TAG] EIP82866 +// [Description] AMIUEFI: Implement the NoPPIClear flag and provide +// operations to set/clear the value or a BIOS config option - Windows +// Partner Bug Management Bug #679996 +// [Files] AmiTcgNvFlagSample.c, AmiTcgNvFlagSample.sdl, +// AmiTcgPlatformDxe.c +// +// 13 12/12/11 1:08p Fredericko +// [TAG] EIP59683 +// [Category] Improvement +// [Description] Allow selection between writing to SMI port as a word +// or as a Byte. +// Some platforms might require word writes to the SMI Status port. +// [Files] Tcg.cif, Tcg.sdl, Tcg_ppi1_2_Ex.asl, TcgSmm.mak, TcgSmm.c +// +// 12 12/07/11 4:27p Fredericko +// +// 11 12/07/11 4:26p Fredericko +// [TAG] EIP59683 +// [Category] Improvement +// [Description] Allow selection between writing to SMI port as a word +// or as a Byte. +// Some platforms might require word writes to the SMI Status port. +// [Files] Tcg.cif, Tcg.sdl, Tcg_ppi1_2_Ex.asl, TcgSmm.mak, TcgSmm.c +// +// 10 8/10/11 4:30p Fredericko +// [TAG] EIPEIP66468 +// [Category] Spec Update +// [Severity] Minor +// [Description] 1. Added some more boundary checking for unsupported +// functions and for handling of Ppi 0 +// [Files] 1. TcgSmm.c +// +// 9 8/09/11 6:29p Fredericko +// [TAG] EIP66468 +// [Category] Spec Update +// [Severity] Minor +// [Description] 1. Changes for Tcg Ppi 1.2 support. +// [Files] 1 TcgSmm.h +// 2.TcgSmm.c +// 3.Tcg_ppi1_2.asl +// 4. AmiTcgNvflagsSample.c +// 5. AmiTcgPlatformPeiLib.c +// 6. AmiTcgPlatformDxe.sdl +// 7. AmiTcgPlatformDxe.c +// +// 8 7/25/11 3:20a Fredericko +// [TAG] EIP65177 +// [Category] Spec Update +// [Severity] Minor +// [Description] TCG Ppi Sec ver 1.2 update +// +// 7 2/16/11 10:37a Fredericko +// [TAG] EIP54014 +// [Category] BUG FIX +// [Severity] HIGH +// [Symptom] TPM initialize failed using win7 tool tpm.msc after drive +// bitlocker test. +// [RootCause] wrong size used for getvariable +// [Solution] Use correct size +// [Files] TCGSmm.c +// +// 6 8/23/10 4:21p Fredericko +// Code Clean up. Removed port 80 checkpoint writes from code. +// +// 5 8/09/10 2:34p Fredericko +// Added NVRAM writes functions for TCG PPI support. Moved from TcgBoard +// component +// +// 4 8/04/10 5:07p Fredericko +// Changed AMI interface to use only one SMI value instead of 3 +// +// 3 5/20/10 8:54a Fredericko +// Included File Header +// Included File Revision History +// Code Beautification +// EIP 37653 +// +//************************************************************************* +//<AMI_FHDR_START> +// +// Name: TCGSmm.c +// +// Description: +// Function definition file for TCGSMM subcomponent +// +//<AMI_FHDR_END> +//************************************************************************* + +#include "TCGSmm.h" +#include <Tpm20Includes\TrEEProtocol.h> +#include <Setup.h> + +#if WORD_ACCESS_SMI_PORT == 0x01 +void DisablePlatformSMI(); +#endif + +VOID NVOSWrite_PPI_request ( + IN EFI_HANDLE DispatchHandle, + IN EFI_SMM_SW_DISPATCH_CONTEXT *DispatchContext ); + +VOID NVOSWrite_MOR_request ( + IN EFI_HANDLE DispatchHandle, + IN EFI_SMM_SW_DISPATCH_CONTEXT *DispatchContext ); + +VOID NVOSRead_PPI_request ( + IN EFI_HANDLE DispatchHandle, + IN EFI_SMM_SW_DISPATCH_CONTEXT *DispatchContext ); + +EFI_STATUS GetNextGuidHob( + IN OUT VOID **HobStart, + IN EFI_GUID * Guid, + OUT VOID **Buffer, + OUT UINTN*BufferSize OPTIONAL ) +{ + return EFI_SUCCESS; +} + +typedef EFI_STATUS (*SHOW_BOOT_TIME_VARIABLES)(BOOLEAN Show); + +static EFI_GUID AmiNvramControlProtocolGuid = { 0xf7ca7568, 0x5a09, 0x4d2c, { 0x8a, 0x9b, 0x75, 0x84, 0x68, 0x59, 0x2a, 0xe2 } }; +typedef EFI_STATUS (*SHOW_BOOT_TIME_VARIABLES)(BOOLEAN Show); + +typedef struct{ + SHOW_BOOT_TIME_VARIABLES ShowBootTimeVariables; +} AMI_NVRAM_CONTROL_PROTOCOL; + + +AMI_NVRAM_CONTROL_PROTOCOL *NvramControl = NULL; + + +UINT8 ReadSmiPort(UINT16 Port) +{ + #if WORD_ACCESS_SMI_PORT == 0x00 + return (IoRead8(Port )); + #else + if(Port == (TCGSMIDATAPORT)){ + Port = TCGSMIPORT; + return ((UINT8)(((IoRead16( Port ) & 0xFF00))>> 8)); + } + else{ + return ((UINT8)(IoRead16( Port ) & 0x00FF)); + } + #endif +} + + +VOID WritebyteSmiPort(UINT16 Port, UINT8 data) +{ + UINT16 SmiPortVal = 0; + + #if WORD_ACCESS_SMI_PORT == 0x00 + IoWrite8(Port, data ); + #else + SmiPortVal = ReadSmiPort (TCGSMIPORT); + if(Port == TCGSMIDATAPORT) + { + SmiPortVal |= (data << 8); + }else{ + return; //don't change current SMI value + } + Port = TCGSMIPORT; + DisablePlatformSMI(); //put this function under board so that it is added to the CSP lib + IoWrite16(Port, SmiPortVal ); + EnablePlatformSMI(); + #endif +} + + +//********************************************************************** +//<AMI_PHDR_START> +// +// Procedure: NVOSread_PPI_request +// +// Description: Returns TCG PPI variable values to the Operating system +// +// +// Input: IN EFI_HANDLE DispatchHandle, +// IN EFI_SMM_SW_DISPATCH_CONTEXT *DispatchContext +// +// Output: VOID +// +// Modified: +// +// Referrals: +// +// Notes: +//<AMI_PHDR_END> +//********************************************************************** +VOID NVOSRead_PPI_request( + IN EFI_HANDLE DispatchHandle, + IN EFI_SMM_SW_DISPATCH_CONTEXT *DispatchContext ) +{ + UINTN Size = sizeof(AMI_PPI_NV_VAR); + AMI_PPI_NV_VAR Temp; + UINT8 Read_value = 0; + EFI_STATUS Status; + + Read_value = ReadSmiPort( TCGSMIDATAPORT ); + + if (NvramControl == NULL) + NvramControl = GetSmstConfigurationTable(&AmiNvramControlProtocolGuid); + + if (NvramControl) NvramControl->ShowBootTimeVariables(TRUE); + + Status = pRS->GetVariable( L"AMITCGPPIVAR", \ + &SmmtcgefiOsVariableGuid, \ + NULL, \ + &Size, \ + &Temp ); + + if (NvramControl) NvramControl->ShowBootTimeVariables(FALSE); + + if(Status){ + WritebyteSmiPort( TCGSMIDATAPORT, 0xFF ); + return; + } + + switch (Read_value & TYPE_MASK ){ + case RQSTVAR: + WritebyteSmiPort( TCGSMIDATAPORT, Temp.RQST ); + break; + case RCNTVAR: + WritebyteSmiPort( TCGSMIDATAPORT, Temp.RCNT ); + break; + case ERRORVAR: + WritebyteSmiPort( TCGSMIDATAPORT, Temp.ERROR ); + case ERRORVAR2: + WritebyteSmiPort( TCGSMIDATAPORT, Temp.AmiMisc ); + break; + default: + WritebyteSmiPort( TCGSMIDATAPORT, 0xFF ); + break; + } +} + +//**************************************************************************************** +//<AMI_PHDR_START> +// +// Procedure: NVWrite_PPI_request +// +// Description: Writes TCG PPI variable values to NVRAM on SMI request the Operating system +// +// +// Input: IN EFI_HANDLE DispatchHandle, +// IN EFI_SMM_SW_DISPATCH_CONTEXT *DispatchContext +// +// Output: VOID +// +// Modified: +// +// Referrals: +// +// Notes: +//<AMI_PHDR_END> +//**************************************************************************************** +VOID NVOSWrite_PPI_request( + IN EFI_HANDLE DispatchHandle, + IN EFI_SMM_SW_DISPATCH_CONTEXT *DispatchContext ) +{ + UINTN Size = sizeof(AMI_PPI_NV_VAR); + AMI_PPI_NV_VAR Temp; + EFI_STATUS Status; + UINT8 Read_value = 0; + UINT32 attrib = EFI_VARIABLE_NON_VOLATILE | EFI_VARIABLE_BOOTSERVICE_ACCESS; + + Read_value = ReadSmiPort( TCGSMIDATAPORT ); + + if( Read_value == TCPA_PPIOP_UNOWNEDFIELDUPGRADE + || Read_value == TCPA_PPIOP_SETOPAUTH + || Read_value == TCPA_PPIOP_SETNOPPIMAINTENANCE_FALSE + || Read_value == TCPA_PPIOP_SETNOPPIMAINTENANCE_TRUE + || Read_value > TCPA_PPIOP_ENABLE_ACTV_CLEAR_ENABLE_ACTV) + { + WritebyteSmiPort( TCGSMIDATAPORT, 0xF1 ); + return; + } + + if(Read_value >= 0 && Read_value < 23) + { + Temp.RQST = Read_value; + Temp.RCNT = Read_value; + Temp.ERROR = 0; + Temp.Flag = 0; + Temp.AmiMisc = 0; + + if (NvramControl == NULL) + NvramControl = GetSmstConfigurationTable(&AmiNvramControlProtocolGuid); + + if (NvramControl) NvramControl->ShowBootTimeVariables(TRUE); + + Status = pRS->SetVariable( L"AMITCGPPIVAR", \ + &SmmtcgefiOsVariableGuid, \ + attrib, \ + Size, \ + &Temp ); + + if(Status == EFI_INVALID_PARAMETER) + { + Status = pRS->SetVariable(L"AMITCGPPIVAR", \ + &SmmtcgefiOsVariableGuid, \ + 0, \ + 0, \ + NULL); + + if(EFI_ERROR(Status)){ + if (NvramControl) NvramControl->ShowBootTimeVariables(FALSE); + return; + } + + Status = pRS->SetVariable( L"AMITCGPPIVAR", \ + &SmmtcgefiOsVariableGuid, \ + attrib, \ + Size, \ + &Temp ); + } + + if (NvramControl) NvramControl->ShowBootTimeVariables(FALSE); + + if(Status){ + WritebyteSmiPort( TCGSMIDATAPORT, 0xFF ); + return; + } + }else{ + WritebyteSmiPort( TCGSMIDATAPORT, 0xF1 ); + return; + } +} + + + +#if defined TCGPPISPEC_1_2_SUPPORT && TCGPPISPEC_1_2_SUPPORT == 1 +//**************************************************************************************** +//<AMI_PHDR_START> +// +// Procedure: Read_User_Confirmation_Status +// +// Description: Reads the user confirmation satus for PPI requests +// +// +// Input: IN EFI_HANDLE DispatchHandle, +// IN EFI_SMM_SW_DISPATCH_CONTEXT *DispatchContext +// +// Output: VOID +// +// Modified: +// +// Referrals: +// +// Notes: +//<AMI_PHDR_END> +//**************************************************************************************** +VOID Read_User_Confirmation_Status( + IN EFI_HANDLE DispatchHandle, + IN EFI_SMM_SW_DISPATCH_CONTEXT *DispatchContext ) +{ + UINTN Size = sizeof(PERSISTENT_BIOS_TPM_FLAGS); + UINTN BiosSize = sizeof(AMI_PPI_NV_VAR); + AMI_PPI_NV_VAR Temp; + PERSISTENT_BIOS_TPM_FLAGS TpmNvFlags; + UINT8 Read_value = 0; + EFI_STATUS Status; + SETUP_DATA SetupDataBuffer; + UINTN SetupVariableSize = sizeof(SETUP_DATA); + UINT32 SetupVariableAttributes=0; + EFI_GUID gSetupGuid = SETUP_GUID; + UINT32 attrib = EFI_VARIABLE_NON_VOLATILE | EFI_VARIABLE_BOOTSERVICE_ACCESS; + if (NvramControl == NULL) + NvramControl = GetSmstConfigurationTable(&AmiNvramControlProtocolGuid); + + if (NvramControl) NvramControl->ShowBootTimeVariables(TRUE); + + + Read_value = ReadSmiPort( TCGSMIDATAPORT ); + + Status = pRS->GetVariable( L"AMITCGPPIVAR", \ + &SmmtcgefiOsVariableGuid, \ + NULL, \ + &BiosSize, \ + &Temp ); + + //reset ppi transaction flag + Temp.Flag = 0; + + Status = pRS->SetVariable( L"AMITCGPPIVAR", \ + &SmmtcgefiOsVariableGuid, \ + attrib, \ + BiosSize, \ + &Temp ); + + if(Status == EFI_INVALID_PARAMETER) + { + Status = pRS->SetVariable(L"AMITCGPPIVAR", \ + &SmmtcgefiOsVariableGuid, \ + 0, \ + 0, \ + NULL); + + if(EFI_ERROR(Status)){ + if (NvramControl) NvramControl->ShowBootTimeVariables(FALSE); + return; + } + + Status = pRS->SetVariable( L"AMITCGPPIVAR", \ + &SmmtcgefiOsVariableGuid, \ + attrib, \ + BiosSize, \ + &Temp ); + } + + + Status = pRS->GetVariable( L"TPMPERBIOSFLAGS", \ + &SmmFlagsStatusguid, \ + NULL, \ + &Size, \ + &TpmNvFlags ); + + Status = pRS->GetVariable ( + L"Setup", + &gSetupGuid, + &SetupVariableAttributes, + &SetupVariableSize, + &SetupDataBuffer); + + if (NvramControl) NvramControl->ShowBootTimeVariables(FALSE); + + if(Read_value >= 0 && Read_value < 23) + { + if(Read_value == 0 ) + { + WritebyteSmiPort( TCGSMIDATAPORT, 0x4 ); + return; + } + + if( Read_value == TCPA_PPIOP_UNOWNEDFIELDUPGRADE + || Read_value == TCPA_PPIOP_SETOPAUTH + || Read_value == TCPA_PPIOP_SETNOPPIMAINTENANCE_FALSE + || Read_value == TCPA_PPIOP_SETNOPPIMAINTENANCE_TRUE + || Read_value > TCPA_PPIOP_ENABLE_ACTV_CLEAR_ENABLE_ACTV) + { + WritebyteSmiPort( TCGSMIDATAPORT, 0x0 ); + return; + }else if(Read_value == TCPA_PPIOP_CLEAR || Read_value == TCPA_PPIOP_ENABLE_ACTV_CLEAR ) + { + if(TpmNvFlags.NoPpiClear == TRUE){ + WritebyteSmiPort( TCGSMIDATAPORT, 0x4 ); + }else{ + WritebyteSmiPort( TCGSMIDATAPORT, 0x3 ); + } + return; + }else if(Read_value == TCPA_PPIOP_CLEAR_ENACT || Read_value == TCPA_PPIOP_ENABLE_ACTV_CLEAR_ENABLE_ACTV) + { + if(TpmNvFlags.NoPpiClear == TRUE && TpmNvFlags.NoPpiProvision == TRUE ){ + WritebyteSmiPort( TCGSMIDATAPORT, 0x4 ); + }else{ + WritebyteSmiPort( TCGSMIDATAPORT, 0x3 ); + } + return; + }else if(Read_value == TCPA_PPIOP_SETNOPPIPROVISION_FALSE || Read_value == TCPA_PPIOP_SETNOPPIPROVISION_TRUE) + { + if(Read_value == TCPA_PPIOP_SETNOPPIPROVISION_TRUE ){ + if(SetupDataBuffer.Tpm20Device == 1){ + WritebyteSmiPort( TCGSMIDATAPORT, 0x4 ); + }else{ + WritebyteSmiPort( TCGSMIDATAPORT, 0x3 ); + } + }else{ + WritebyteSmiPort( TCGSMIDATAPORT, 0x4 ); + } + return; + }else if(Read_value == TCPA_PPIOP_SETNOPPICLEAR_FALSE || Read_value == TCPA_PPIOP_SETNOPPICLEAR_TRUE) + { + if(Read_value == TCPA_PPIOP_SETNOPPICLEAR_TRUE ){ + WritebyteSmiPort( TCGSMIDATAPORT, 0x3 ); + }else{ + WritebyteSmiPort( TCGSMIDATAPORT, 0x4 ); + } + return; + } + else if(TpmNvFlags.NoPpiProvision == TRUE) + { + WritebyteSmiPort( TCGSMIDATAPORT, 0x4 ); + }else + { + WritebyteSmiPort( TCGSMIDATAPORT, 0x3 ); + } + }else{ + WritebyteSmiPort( TCGSMIDATAPORT, 0x0 ); + } +} +#endif + + + +//**************************************************************************************** +//<AMI_PHDR_START> +// +// Procedure: NVOSWrite_MOR_request +// +// Description: Writes TCG PPI MOR variable to NVRAM on SMI request the Operating system +// +// +// Input: IN EFI_HANDLE DispatchHandle, +// IN EFI_SMM_SW_DISPATCH_CONTEXT *DispatchContext +// +// Output: VOID +// +// Modified: +// +// Referrals: +// +// Notes: +//<AMI_PHDR_END> +//**************************************************************************************** +VOID NVOSWrite_MOR_request( + IN EFI_HANDLE DispatchHandle, + IN EFI_SMM_SW_DISPATCH_CONTEXT *DispatchContext ) +{ + UINT8 mor = 0; + UINTN MorSize = sizeof(mor); + EFI_STATUS Status; + CHAR16 UefiMor[] = L"MemoryOverwriteRequestControl"; + EFI_GUID MorUefiGuid = MEMORY_ONLY_RESET_CONTROL_GUID; + UINT8 Read_value = 0; + UINTN PpiVarSize = sizeof(AMI_PPI_NV_VAR); + AMI_PPI_NV_VAR Temp; + UINT32 attrib = EFI_VARIABLE_NON_VOLATILE | EFI_VARIABLE_BOOTSERVICE_ACCESS; + + Read_value = ReadSmiPort( TCGSMIDATAPORT ); + + if (NvramControl == NULL) + NvramControl = GetSmstConfigurationTable(&AmiNvramControlProtocolGuid); + + if (NvramControl) NvramControl->ShowBootTimeVariables(TRUE); + + + Status = pRS->SetVariable( UefiMor, \ + &MorUefiGuid, \ + EFI_VARIABLE_NON_VOLATILE \ + | EFI_VARIABLE_RUNTIME_ACCESS \ + | EFI_VARIABLE_BOOTSERVICE_ACCESS, \ + MorSize, \ + &Read_value ); + + if(Status){ + if (NvramControl) NvramControl->ShowBootTimeVariables(FALSE); + WritebyteSmiPort( TCGSMIDATAPORT, 0xFF ); + return; + } + + Status = pRS->GetVariable( L"AMITCGPPIVAR", \ + &SmmtcgefiOsVariableGuid, \ + NULL, \ + &PpiVarSize, \ + &Temp ); + + if(Status){ + if (NvramControl) NvramControl->ShowBootTimeVariables(FALSE); + WritebyteSmiPort( TCGSMIDATAPORT, 0xFF ); + return; + } + + Temp.Flag = 0; + + Status = pRS->SetVariable( L"AMITCGPPIVAR", \ + &SmmtcgefiOsVariableGuid, \ + attrib, \ + PpiVarSize, \ + &Temp ); + + if(Status == EFI_INVALID_PARAMETER) + { + Status = pRS->SetVariable(L"AMITCGPPIVAR", \ + &SmmtcgefiOsVariableGuid, \ + 0, \ + 0, \ + NULL); + + if(EFI_ERROR(Status)){ + if (NvramControl) NvramControl->ShowBootTimeVariables(FALSE); + return; + } + + Status = pRS->SetVariable( L"AMITCGPPIVAR", \ + &SmmtcgefiOsVariableGuid, \ + attrib, \ + PpiVarSize, \ + &Temp); + } + + if(Status){ + if (NvramControl) NvramControl->ShowBootTimeVariables(FALSE); + WritebyteSmiPort( TCGSMIDATAPORT, 0xFF ); + return; + } + + if (NvramControl) NvramControl->ShowBootTimeVariables(FALSE); +} + + +//********************************************************************** +//<AMI_PHDR_START> +// +// Procedure: TcgCommonSetFlag +// +// Description: Common function to set flag for PPI write transactions +// +// +// Input: UINT8 Data +// +// Output: EFI_STATUS +// +// Modified: +// +// Referrals: +// +// Notes: +//<AMI_PHDR_END> +//********************************************************************** +EFI_STATUS TcgCommonSetFlag( + UINT8 Data +) +{ + EFI_STATUS Status; + UINTN Size = sizeof(AMI_PPI_NV_VAR); + AMI_PPI_NV_VAR Temp; + UINT32 attrib = EFI_VARIABLE_NON_VOLATILE | EFI_VARIABLE_BOOTSERVICE_ACCESS; + + + if (NvramControl == NULL) + NvramControl = GetSmstConfigurationTable(&AmiNvramControlProtocolGuid); + + if (NvramControl) NvramControl->ShowBootTimeVariables(TRUE); + + Status = pRS->GetVariable( L"AMITCGPPIVAR", \ + &SmmtcgefiOsVariableGuid, \ + NULL, \ + &Size, \ + &Temp ); + + if(Status){ + if (NvramControl) NvramControl->ShowBootTimeVariables(FALSE); + return Status; + } + + if((Data & TYPE_MASK) == WRITERQST){ + + Temp.Flag = WRITEENDRQSTFLAG; + + } + else if((Data & TYPE_MASK) == WRITEMOR){ + + Temp.Flag = WRITEENDMORFLAG; + } +#if defined TCGPPISPEC_1_2_SUPPORT && TCGPPISPEC_1_2_SUPPORT == 1 + else if((Data & TYPE_MASK) == CONFIRMATION){ + + Temp.Flag = READENDCONFLAG; + } +#endif + + Status = pRS->SetVariable( L"AMITCGPPIVAR", \ + &SmmtcgefiOsVariableGuid, \ + attrib, \ + Size, \ + &Temp ); + + if(Status == EFI_INVALID_PARAMETER) + { + Status = pRS->SetVariable(L"AMITCGPPIVAR", \ + &SmmtcgefiOsVariableGuid, \ + 0, \ + 0, \ + NULL); + + if(EFI_ERROR(Status)){ + if (NvramControl) NvramControl->ShowBootTimeVariables(FALSE); + return Status; + } + + Status = pRS->SetVariable( L"AMITCGPPIVAR", \ + &SmmtcgefiOsVariableGuid, \ + attrib, \ + Size, \ + &Temp); + } + + + + if (NvramControl) NvramControl->ShowBootTimeVariables(FALSE); + return Status; +} + + +//********************************************************************** +//<AMI_PHDR_START> +// +// Procedure: TcgSmiCommonHandler +// +// Description: Common function to handle TCG SMI's +// +// +// Input: IN EFI_HANDLE DispatchHandle, +// IN EFI_SMM_SW_DISPATCH_CONTEXT *DispatchContext +// +// Output: VOID +// +// Modified: +// +// Referrals: +// +// Notes: +//<AMI_PHDR_END> +//********************************************************************** +VOID TcgSmiCommonHandler( + IN EFI_HANDLE DispatchHandle, + IN EFI_SMM_SW_DISPATCH_CONTEXT *DispatchContext ) +{ + EFI_STATUS Status; + UINTN Size = sizeof(AMI_PPI_NV_VAR); + AMI_PPI_NV_VAR Temp; + UINT8 Data; + + + Data = ReadSmiPort( TCGSMIDATAPORT ); + + if (NvramControl == NULL) + NvramControl = GetSmstConfigurationTable(&AmiNvramControlProtocolGuid); + + if (NvramControl) NvramControl->ShowBootTimeVariables(TRUE); + + Status = pRS->GetVariable( L"AMITCGPPIVAR", \ + &SmmtcgefiOsVariableGuid, \ + NULL, \ + &Size, \ + &Temp ); + + if (NvramControl) NvramControl->ShowBootTimeVariables(FALSE); + + if(Status){ + WritebyteSmiPort( TCGSMIDATAPORT, 0xFF ); + return; + } + +#if defined TCGPPISPEC_1_2_SUPPORT && TCGPPISPEC_1_2_SUPPORT == 1 + if(Temp.Flag == READENDCONFLAG){ + Read_User_Confirmation_Status ( DispatchHandle, DispatchContext ); + return; + } +#endif + + if(Temp.Flag == WRITEENDRQSTFLAG){ + + NVOSWrite_PPI_request( DispatchHandle, DispatchContext ); + return; + + }else if(Temp.Flag == WRITEENDMORFLAG){ + + NVOSWrite_MOR_request( DispatchHandle, DispatchContext ); + return; + } + + switch(Data & TRANSACTION_MASK) + { + case READTRANSACTION: + NVOSRead_PPI_request( DispatchHandle, DispatchContext); + break; + case WRITETRANSACTION: + Status = TcgCommonSetFlag(Data); + if(Status){ + WritebyteSmiPort( TCGSMIDATAPORT, 0xFF ); + } + break; +#if defined TCGPPISPEC_1_2_SUPPORT && TCGPPISPEC_1_2_SUPPORT == 1 + case GETCONFTRANSACTION: + Status = TcgCommonSetFlag(Data); + if(Status){ + WritebyteSmiPort( TCGSMIDATAPORT, 0x00 ); + } + break; +#endif + default: + break; + } +} + +//********************************************************************** +//<AMI_PHDR_START> +// +// Procedure: HelpRegisterPPISMI +// +// Description: Common function to handle TCG SMI's +// +// +// Input: IN EFI_HANDLE ImageHandle, +// IN EFI_SYSTEM_TABLE *SystemTable +// +// Output: EFI_STATUS +// +// Modified: +// +// Referrals: +// +// Notes: +//<AMI_PHDR_END> +//********************************************************************** +EFI_STATUS HelpRegisterPPISMI( + IN EFI_HANDLE ImageHandle, + IN EFI_SYSTEM_TABLE *SystemTable ) +{ + EFI_SMM_SW_DISPATCH_PROTOCOL *pSwDispatch; + EFI_SMM_SW_DISPATCH_CONTEXT SwContext; + EFI_HANDLE Handle; + EFI_HANDLE DummyHandle = NULL; + EFI_STATUS Status; + + VERIFY_EFI_ERROR( pBS->LocateProtocol( + &gEfiSmmSwDispatchProtocolGuid, NULL, &pSwDispatch + )); + + TRACE((TRACE_ALWAYS, "SMIFlash: Registering TCG SMI functions at offset\n")); + + SwContext.SwSmiInputValue = PPI_OFFSET; + Status = pSwDispatch->Register( pSwDispatch, + TcgSmiCommonHandler, + &SwContext, + &Handle ); + + ASSERT_EFI_ERROR( Status ); + + if ( EFI_ERROR( Status )){ + return EFI_SUCCESS; + } + + return Status; +} + +//********************************************************************** +//<AMI_PHDR_START> +// +// Procedure: TCGSmmInit +// +// Description: Entry point for subcomponent +// +// Input: IN EFI_HANDLE ImageHandle, +// IN EFI_SYSTEM_TABLE *SystemTable +// +// Output: EFI_STATUS +// +// Modified: +// +// Referrals: +// +// Notes: +// +//<AMI_PHDR_END> +//********************************************************************** +EFI_STATUS TCGSmmInit( + IN EFI_HANDLE ImageHandle, + IN EFI_SYSTEM_TABLE *SystemTable ) +{ + EFI_STATUS Status; + EFI_SMM_SW_DISPATCH_PROTOCOL *SwDispatch; + EFI_GUID gTreeprotocol = EFI_TREE_PROTOCOL_GUID; + EFI_GUID gAmiTcgPltformProtocol = AMI_TCG_PLATFORM_PROTOCOL_GUID; + EFI_TREE_PROTOCOL *TreeProtocol = NULL; + + InitAmiLib( ImageHandle, SystemTable ); + Status = pBS->LocateProtocol( &SwDispatchProtocolGuid, NULL, &SwDispatch ); + + if ( EFI_ERROR( Status )) + { + return Status; + } + + Status = pBS->LocateProtocol(&gTreeprotocol, NULL, &TreeProtocol); + if(EFI_ERROR(Status)){ + Status = pBS->LocateProtocol(&gAmiTcgPltformProtocol, NULL, &TreeProtocol); + if(EFI_ERROR(Status))return Status; + } + + return InitSmmHandler( ImageHandle, SystemTable, HelpRegisterPPISMI, NULL ); +} + +//************************************************************************* +//************************************************************************* +//** ** +//** (C)Copyright 1985-2010, American Megatrends, Inc. ** +//** ** +//** All Rights Reserved. ** +//** ** +//** 5555 Oakbrook Parkway, Suite 200, Norcross, GA 30093 ** +//** ** +//** Phone: (770)-246-8600 ** +//** ** +//************************************************************************* +//************************************************************************* |