Add following library instances to MDE package:
1. DxePciLibPciRootBridgeIo 2. DxePciSegmentLibPciRootBridgeIo 3. PeiPciLibPciCfg2 4. PeiPciSegmentLibPciCfg2 5. UefiPalLib 6. UefiSalLib git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@6451 6f19259b-4bc3-4df7-8a09-765794883524
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126
MdePkg/Library/UefiPalLib/UefiPalLib.c
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126
MdePkg/Library/UefiPalLib/UefiPalLib.c
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/** @file
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PAL Library implementation built upon UEFI.
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Copyright (c) 2007 - 2008, Intel Corporation All rights
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reserved. This program and the accompanying materials are
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licensed and made available under the terms and conditions of
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the BSD License which accompanies this distribution. The full
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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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**/
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#include <PiDxe.h>
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#include <IndustryStandard/Sal.h>
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#include <Library/UefiLib.h>
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#include <Library/BaseLib.h>
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#include <Library/DebugLib.h>
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#include <Guid/SalSystemTable.h>
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UINT64 mPalProcEntry;
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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'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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{
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//
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// mPalProcEntry is initialized in library constructor as PAL entry.
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//
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return AsmPalCall (
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mPalProcEntry,
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Index,
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Arg2,
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Arg3,
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Arg4
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);
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}
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/**
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The constructor function of UEFI Pal Lib.
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The constructor function looks up the SAL System Table in the EFI System Configuration
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Table. Once the SAL System Table is found, the PAL Entry Point in the SAL System Table
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will be derived and stored inot a global variable for library usage.
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It will ASSERT() if the SAL System Table cannot be found or the data in the SAL System
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Table is not the valid data.
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@param ImageHandle The firmware allocated handle for the EFI image.
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@param SystemTable A pointer to the EFI System Table.
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@retval EFI_SUCCESS The constructor always returns EFI_SUCCESS.
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**/
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EFI_STATUS
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EFIAPI
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UefiPalLibConstructor (
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IN EFI_HANDLE ImageHandle,
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IN EFI_SYSTEM_TABLE *SystemTable
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)
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{
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EFI_STATUS Status;
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SAL_ST_ENTRY_POINT_DESCRIPTOR *SalStEntryDes;
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SAL_SYSTEM_TABLE_HEADER *SalSystemTable;
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Status = EfiGetSystemConfigurationTable (
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&gEfiSalSystemTableGuid,
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(VOID **) &SalSystemTable
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);
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ASSERT_EFI_ERROR (Status);
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//
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// Move the SAL System Table point to the first Entry
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// Due to the SAL Entry is in ascending order with the Entry type,
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// the type 0 Entry should be the first if exist.
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//
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SalStEntryDes = (SAL_ST_ENTRY_POINT_DESCRIPTOR *)(SalSystemTable + 1);
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//
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// Assure the SAL ENTRY Type is 0
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//
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ASSERT (SalStEntryDes->Type == EFI_SAL_ST_ENTRY_POINT);
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mPalProcEntry = SalStEntryDes->PalProcEntry;
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//
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// Make sure the PalCallAddress has the valid value
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//
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ASSERT (mPalProcEntry != 0);
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return EFI_SUCCESS;
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}
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