mirror of https://github.com/acidanthera/audk.git
62 lines
2.3 KiB
C
62 lines
2.3 KiB
C
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/** @file
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PAL Call Services
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Copyright (c) 2006, 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: PalCallLib.h
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**/
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#ifndef __PAL_CALL_LIB_H__
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#define __PAL_CALL_LIB_H__
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#include <Base.h>
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//
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// PAL_CALL_RETURN
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//
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/**
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Makes a PAL procedure call.
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This is a wrapper function to make a PAL procedure call. Based on the Index value,
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this API will make static or stacked PAL call. Architected procedures may be designated
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as required or optional. If a PAL procedure is specified as optional, a unique return
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code of 0xFFFFFFFFFFFFFFFF is returned in the Status field of the PAL_CALL_RETURN structure.
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This indicates that the procedure is not present in this PAL implementation. It is the
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caller<EFBFBD><EFBFBD>s responsibility to check for this return code after calling any optional PAL
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procedure. No parameter checking is performed on the 4 input parameters, but there are
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some common rules that the caller should follow when making a PAL call. Any address
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passed to PAL as buffers for return parameters must be 8-byte aligned. Unaligned addresses
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may cause undefined results. For those parameters defined as reserved or some fields
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defined as reserved must be zero filled or the invalid argument return value may be
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returned or undefined result may occur during the execution of the procedure.
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This function is only available on IPF.
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@param Index - The PAL procedure Index number.
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@param Arg2 - The 2nd parameter for PAL procedure calls.
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@param Arg3 - The 3rd parameter for PAL procedure calls.
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@param Arg4 - The 4th parameter for PAL procedure calls.
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@return structure returned from the PAL Call procedure, including the status and return value.
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**/
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PAL_CALL_RETURN
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EFIAPI
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PalCall (
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IN UINT64 Index,
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IN UINT64 Arg2,
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IN UINT64 Arg3,
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IN UINT64 Arg4
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);
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#endif
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