diff options
Diffstat (limited to 'Board/EM/TCG2/Common/Tpm20Acpi/tcg_ppi1_2_Ex.asl')
| -rw-r--r-- | Board/EM/TCG2/Common/Tpm20Acpi/tcg_ppi1_2_Ex.asl | 301 |
1 files changed, 301 insertions, 0 deletions
diff --git a/Board/EM/TCG2/Common/Tpm20Acpi/tcg_ppi1_2_Ex.asl b/Board/EM/TCG2/Common/Tpm20Acpi/tcg_ppi1_2_Ex.asl new file mode 100644 index 0000000..6d74b1e --- /dev/null +++ b/Board/EM/TCG2/Common/Tpm20Acpi/tcg_ppi1_2_Ex.asl @@ -0,0 +1,301 @@ +//********************************************************************** +//<AMI_PHDR_START> +// +// Procedure: _DSM PPI Method for TPM device +// +// Description: Implement Phisical Presence Interface using WordAcc +// +// Input: \_SB.PCI0.LPCB.TP +// +// Output: PPI result +// +// Modified: +// +// Referrals: +// +// Notes: +//<AMI_PHDR_END> +//********************************************************************** +Scope(\_SB.TPM) +{ + OperationRegion (TSMI, SystemIO, SMIA , 0x2) + Field (TSMI, WordAcc, NoLock, Preserve) + { + SMI,16, + } + + Method( _DSM , 4) + { + if( LEqual(Arg0,ToUUID("3DDDFAA6-361B-4EB4-A424-8D10089D1653"))) + { + switch(ToInteger(Arg2)) + { + // + // Function 0: Return supported funcitons + // + case(0) + { + return (Buffer() {0xff,0x01}) //support functions 0-6 + } + + // + // Function 1: Ge PPI Version + // + case(1) + { + return ("1.2") + } + + // + // Function 2: Submit TPM Operation request + // Arg3[0]: Integer - Operation Value + case(2) + { + ToInteger(DeRefOf(Index(Arg3,0)), TMF2) //save request in temp flag + Store(OFST, TMF1) + Or(0x1200, TMF1, TMF1) + + Store(0xFA,P80D) + Store(TMF1,SMI) + Store(SMI,TMF1) + ShiftRight(TMF1, 0x8, TMF1) + + if(Lequal(TMF1,0xFF)){ + return(0x2) + } + + ShiftLeft(TMF2, 0x8, TMF2) + Or(OFST, TMF2, TMF2) + + Store(TMF2,SMI) + Store(SMI,TMF1) + ShiftRight(TMF1, 0x8, TMF1) + + if(Lequal(TMF1,0xFF)){ + return(0x2) + } + + if(Lequal(TMF1,0xFF)){ + return(0x1) + } + + return (Zero) //Success + } + + // + // Function 3: Get pending TPM operation + case(3) + { + Store(0xFB,P80D) + Name(PPI1, Package(){0,0}) + Store(OFST,TMF1) + Or(0x1100, TMF1, TMF1) + + Store(TMF1, SMI) + Store(SMI,TMF1) + ShiftRight(TMF1, 0x8, TMF1) + + if(Lequal(TMF1,0xFF)){ + return(0x1) + } + + Store(TMF1, Index(PPI1,1)) + return(PPI1) + } + + // + // Function 4: Get platform-specific action to transition + // ot Pre-OS + // Returns: + // 0: None + // 1: Shutdown + // 2: Reboot + // 3: OS Vendor Specific + case(4) + { + Store(0xFC,P80D) + return (TRST) //Shutdown + } + + // + // Function 5: Return TPM responce + // + case(5) + { + Name(PPI2, Package(){0,0,0}) + Store(0xFD,P80D) + Store(OFST,TMF1) + Or(0x2100, TMF1, TMF1) + Store(TMF1,SMI) + + Store(SMI,TMF1) + ShiftRight(TMF1, 0x8, TMF1) + + if(Lequal(TMF1,0xFF)){ + return(0x2) + } + + Store(TMF1, Index(PPI2,1)) + + Store(OFST,TMF1) + Or(0x3100, TMF1, TMF1) + + Store(TMF1,SMI) + + Store(SMI,TMF1) + ShiftRight(TMF1, 0x8, TMF1) + + + if(Lequal(TMF1,0xFF)){ + return(0x2) + } + + IF (Lequal(TMF1, 0xF0)) + { + Store(OFST,TMF1) + Or(0x5100, TMF1, TMF1) + Store(TMF1,SMI) + Store(SMI,TMF1) + ShiftRight(TMF1, 0x8, TMF1) + + if(Lequal(TMF1,0xFF)){ + Store(0xFFFFFFF0, Index(PPI2,2)) + return(PPI2) + } + + } + ElseIF (Lequal(TMF1, 0xF1)) + { + Store(OFST,TMF1) + Or(0x5100, TMF1, TMF1) + Store(TMF1,SMI) + Store(SMI,TMF1) + ShiftRight(TMF1, 0x8, TMF1) + + if(Lequal(TMF1,0xFF)){ + Store(0xFFFFFFF1, Index(PPI2,2)) + return(PPI2) + } + } + Else + {Store(TMF1, Index(PPI2,2))} + return(PPI2) + } + + + // + // Function 6: Submit preferred user language + // Ppi Spec 1.2 section 2.1.6 + // Arg3[0]: String - preferred language code + case(6) + { + return ( 0x03 ) //Success + } + + + // + // Function 7: Submit TPM Operation Request to Pre-OS Environment 2 + // Ppi Spec 1.2 section 2.1.7 + // Arg3[0]: String - preferred language code + case(7) + { + ToInteger(DeRefOf(Index(Arg3,0)), TMF2) //save request in temp flag + Store(0xFE,P80D) + Store(OFST,TMF1) + Or(0x1200, TMF1, TMF1) + Store(TMF1,SMI) + + Store(SMI,TMF1) + ShiftRight(TMF1, 0x8, TMF1) + + if(Lequal(TMF1,0xFF)){ + return(0x2) + } + + ShiftLeft(TMF2, 0x8, TMF2) + Or(OFST, TMF2, TMF2) + + Store(TMF2,SMI) + Store(SMI,TMF1) + ShiftRight(TMF1, 0x8, TMF1) + + + if(Lequal(TMF1,0xFF)){ + return(0x2) + } + + if(Lequal(TMF1,0xF1)){ + return(0x1) + } + + return (Zero) //Success + } + + case(8) + { + Store(0xFF,P80D) + ToInteger(DeRefOf(Index(Arg3,0)), TMF2) //save request in temp flag + Store(OFST,TMF1) + Or(0x4300, TMF1, TMF1) + Store(TMF1,SMI) + Store(SMI,TMF1) + ShiftLeft(TMF2, 0x8, TMF2) + Or(OFST, TMF2, TMF2) + Store(TMF2,SMI) + Store(SMI,TMF1) + ShiftRight(TMF1, 0x8, TMF1) + return (TMF1) + } + + default { } + } + } else {if(LEqual(Arg0, + ToUUID("376054ED-CC13-4675-901C-4756D7F2D45D"))){ + // + // Reset Atack Mitigation + // + switch(ToInteger(Arg2)) + { + // + // Function 0: Return supported funcitons + // + case(0) + { + return (Buffer() {0x3}) //support functions 0 and 1 + } + + // + // Function 1: Set MOR Bit State + // + case(1) + { + Store(0xF1,P80D) + Or(0x2200, TMF1, TMF1) + Store(TMF1,SMI) + Store(SMI,TMF1) + ShiftRight(TMF1, 0x8, TMF1) + + if(Lequal(TMF1,0xFF)){ + return(0x2) + } + + ToInteger(DeRefOf(Index(Arg3,0)), TMF1) //save request in temp flag + ShiftLeft(TMF1, 0x8, TMF1) + Or(OFST, TMF1, TMF1) + Store(TMF1,SMI) + Store(SMI,TMF1) + ShiftRight(TMF1, 0x8, TMF1) + + if(Lequal(TMF1,0xFF)){ + return(0x2) + } + + return (Zero) + } + default { } + } + + }} + return (Buffer() {0}) + } +} |