mirror of https://github.com/acidanthera/audk.git
228 lines
4.6 KiB
C++
228 lines
4.6 KiB
C++
/*++
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Copyright (c) 2004, Intel Corporation
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All rights reserved. This program and the accompanying materials
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are licensed and made available under the terms and conditions of the BSD License
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which accompanies this distribution. The full text of the license may be found at
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http://opensource.org/licenses/bsd-license.php
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THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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Module Name:
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VfrServices.h
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Abstract:
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Prototypes and defines for routines and classes used by the
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EFI VFR compiler.
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--*/
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#ifndef _VFR_SERVICES_H_
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#define _VFR_SERVICES_H_
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class VfrOpcodeHandler
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{
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public:
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VfrOpcodeHandler (
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VOID
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)
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/*++
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Routine Description:
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Constructor for the VFR opcode handling class.
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Arguments:
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None
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Returns:
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None
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--*/
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;
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~VfrOpcodeHandler (
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VOID
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)
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/*++
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Routine Description:
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Destructor for the VFR opcode handler. Free up memory allocated
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while parsing the VFR script.
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Arguments:
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None
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Returns:
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None
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--*/
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;
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void
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WriteIfrBytes (
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VOID
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)
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/*++
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Routine Description:
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This function is invoked at the end of parsing. Its purpose
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is to write out all the IFR bytes that were queued up while
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parsing.
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Arguments:
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None
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Returns:
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None
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--*/
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;
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int
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AddOpcodeByte (
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UINT8 OpcodeByte,
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UINT32 LineNum
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)
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/*++
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Routine Description:
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This function is invoked by the parser when a new IFR
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opcode should be emitted.
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Arguments:
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OpcodeByte - the IFR opcode
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LineNum - the line number from the source file that resulted
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in the opcode being emitted.
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Returns:
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0 always
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--*/
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;
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void
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AddByte (
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UINT8 ByteVal,
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UINT8 KeyByte
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)
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/*++
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Routine Description:
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This function is invoked by the parser when it determines
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that more raw IFR bytes should be emitted to the output stream.
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Here we just queue them up into an output buffer.
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Arguments:
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ByteVal - the raw byte to emit to the output IFR stream
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KeyByte - a value that can be used for debug.
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Returns:
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None
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--*/
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;
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void
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SetVarStoreId (
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UINT16 VarStoreId
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)
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/*++
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Routine Description:
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This function is invoked by the parser when a variable is referenced in the
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VFR. Save the variable store (and set a flag) so that we can later determine
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if we need to emit a varstore-select or varstore-select-pair opcode.
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Arguments:
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VarStoreId - ID of the variable store referenced in the VFR
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Returns:
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None
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--*/
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;
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void
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SetSecondaryVarStoreId (
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UINT16 VarStoreId
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)
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/*++
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Routine Description:
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This function is invoked by the parser when a secondary variable is
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referenced in the VFR. Save the variable store (and set a flag) so
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that we can later determine if we need to emit a varstore-select or
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varstore-pair opcode.
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Arguments:
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VarStoreId - ID of the variable store referenced in the VFR
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Returns:
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None
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--*/
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;
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/* */
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private:
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int
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FlushQueue (
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VOID
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)
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/*++
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Routine Description:
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This function is invoked to flush the internal IFR buffer.
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Arguments:
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None
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Returns:
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0 always
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--*/
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;
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int
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IAddByte (
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UINT8 ByteVal,
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UINT8 KeyByte,
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UINT32 LineNum
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)
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/*++
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Routine Description:
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This internal function is used to add actual IFR bytes to
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the output stream. Most other functions queue up the bytes
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in an internal buffer. Once they come here, there's no
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going back.
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Arguments:
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ByteVal - value to write to output
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KeyByte - key value tied to the byte -- useful for debug
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LineNum - line number from source file the byte resulted from
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Returns:
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0 - if successful
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1 - failed due to memory allocation failure
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--*/
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;
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/* */
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private:
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IFR_BYTE *mIfrBytes;
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IFR_BYTE *mLastIfrByte;
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UINT32 mQueuedByteCount;
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UINT32 mBytesWritten;
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UINT32 mQueuedLineNum;
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UINT8 mQueuedBytes[MAX_QUEUE_COUNT];
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UINT8 mQueuedKeyBytes[MAX_QUEUE_COUNT];
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UINT8 mQueuedOpcodeByte;
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UINT32 mQueuedOpcodeByteValid;
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UINT16 mPrimaryVarStoreId;
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UINT8 mPrimaryVarStoreIdSet;
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UINT16 mSecondaryVarStoreId;
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UINT8 mSecondaryVarStoreIdSet;
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UINT16 mDefaultVarStoreId;
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};
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#endif // #ifndef _VFR_SERVICES_H_
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