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//*************************************************************************
//*************************************************************************
//** **
//** (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 **
//** **
//*************************************************************************
//*************************************************************************
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