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Diffstat (limited to 'Core/EM/CmosManager/CmosAccess.asl')
| -rw-r--r-- | Core/EM/CmosManager/CmosAccess.asl | 131 |
1 files changed, 131 insertions, 0 deletions
diff --git a/Core/EM/CmosManager/CmosAccess.asl b/Core/EM/CmosManager/CmosAccess.asl new file mode 100644 index 0000000..aeff9ee --- /dev/null +++ b/Core/EM/CmosManager/CmosAccess.asl @@ -0,0 +1,131 @@ +//************************************************************************* +//************************************************************************* +//** ** +//** (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/CMOS Manager/CMOS SMM/CmosAccess.asl 4 1/25/12 2:36p Michaela $ +// +// $Revision: 4 $ +// +// $Date: 1/25/12 2:36p $ +//************************************************************************* +// Revision History +// ---------------- +// $Log: /Alaska/SOURCE/Modules/CMOS Manager/CMOS SMM/CmosAccess.asl $ +// +// 4 1/25/12 2:36p Michaela +// +// 3 12/11/11 8:52p Michaela +// +// 2 11/30/11 11:49p Michaela +// [TAG] EIP56197 +// [Category] New Feature +// [Severity] Normal +// [Description] CMOS Manager Support in Runtime Code +// [Files] CmosManager.sdl +// CmosSetup.uni +// CmosMessages.uni +// CmosManagerSmm.cif +// CmosAccess.h +// CmosManagerSmm.c +// CmosAccess.asl +// +// 1 3/16/11 2:44p Michaela +// +//************************************************************************* +//<AMI_FHDR_START> +// +// Name: CmosAccess.asl +// +// Description: +// This file contains an ASL method for accessing CMOS from +// ASL code. +// +//<AMI_FHDR_END> +//************************************************************************* + +Device(CMOS) +{ + Name(_HID, EISAID("PNP0C02")) // System board resources + Name(_UID, 0x18) // Unique ID. + + OperationRegion (SRB0, SystemIO, SRSI, 1) + Field (SRB0, ByteAcc, NoLock, Preserve) + { + SRSM, 8 // SW-SMI ctrl port + } + + // Define a location in root scope to be updated during + // boot to specify the location of a communication buffer. + // Search CMOS_SMM_CONTEXT for data size/type info + // for this operation region (communication buffer). + // Search gAslContext for additional information regarding + // initialization and implemenataion details. + + Name(\CCOM, 0x0123456789ABCDEF) + + OperationRegion (CMOP, SystemMemory, CCOM, 40) + Field (CMOP, AnyAcc, NoLock, Preserve) + { + CODE, 8, // 1 byte Opcode + TOKN, 16, // 2 byte CMOS Token + BYTE, 8, // 1 byte Data value + STAT, 8 // 1 byte status value + } + + //-------------------------------------------------------------------- + // ACCE: access CMOS + // Arg0 - Opcode (0 = Write, 1 = Read) + // Arg1 - CmosToken + // Arg2 - CmosByte + // + // return - 0/FALSE = unsuccessful + // 1/TRUE = successful + //-------------------------------------------------------------------- + Method(ACCE, 3, Serialized){ + + // if \CCOM is not updated, there was an error allocating the + // communication buffer. + + if (LEqual(\CCOM, 0x0123456789ABCDEF)) { + Return(0) + } + + // Write code & value to the communication buffer + Store(Arg0, CODE) + Store(Arg1, TOKN) + Store(Arg2, BYTE) + + // Generate SMI type = CSMI + Store(CSMI, SRSM) + Store(BYTE, Arg2) + + // Arg2 (BTYE) contains the CMOS value on read + // The method return value is Boolean + Return(STAT) + } +} + +//************************************************************************* +//************************************************************************* +//** ** +//** (C)Copyright 1985-2010, American Megatrends, Inc. ** +//** ** +//** All Rights Reserved. ** +//** ** +//** 5555 Oakbrook Parkway, Suite 200, Norcross, GA 30093 ** +//** ** +//** Phone: (770)-246-8600 ** +//** ** +//************************************************************************* +//************************************************************************* |