MdePkg/Library/UefiSalLib/UefiSalLib.c File Reference


Functions

SAL_RETURN_REGS EFIAPI SalCall (IN UINT64 Index, IN UINT64 Arg2, IN UINT64 Arg3, IN UINT64 Arg4, IN UINT64 Arg5, IN UINT64 Arg6, IN UINT64 Arg7, IN UINT64 Arg8)
EFI_STATUS EFIAPI UefiSalLibConstructor (IN EFI_HANDLE ImageHandle, IN EFI_SYSTEM_TABLE *SystemTable)

Variables

EFI_PLABEL mPlabel
SAL_PROC mSalProcEntry

Detailed Description

SAL Library implementation retrieving the SAL Entry Point from the SAL System Table register in the EFI System Configuration Table.

Copyright (c) 2007 - 2010, Intel Corporation. All rights reserved.
This program and the accompanying materials are licensed and made available under the terms and conditions of the BSD License which accompanies this distribution. The full text of the license may be found at http://opensource.org/licenses/bsd-license.php.

THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.


Function Documentation

SAL_RETURN_REGS EFIAPI SalCall ( IN UINT64  Index,
IN UINT64  Arg2,
IN UINT64  Arg3,
IN UINT64  Arg4,
IN UINT64  Arg5,
IN UINT64  Arg6,
IN UINT64  Arg7,
IN UINT64  Arg8 
)

Makes a SAL procedure call.

This is a wrapper function to make a SAL procedure call. No parameter checking is performed on the 8 input parameters, but there are some common rules that the caller should follow when making a SAL call. Any address passed to SAL as buffers for return parameters must be 8-byte aligned. Unaligned addresses may cause undefined results. For those parameters defined as reserved or some fields defined as reserved must be zero filled or the invalid argument return value may be returned or undefined result may occur during the execution of the procedure. This function is only available on IPF.

Parameters:
Index The SAL procedure Index number.
Arg2 The 2nd parameter for SAL procedure calls.
Arg3 The 3rd parameter for SAL procedure calls.
Arg4 The 4th parameter for SAL procedure calls.
Arg5 The 5th parameter for SAL procedure calls.
Arg6 The 6th parameter for SAL procedure calls.
Arg7 The 7th parameter for SAL procedure calls.
Arg8 The 8th parameter for SAL procedure calls.
Returns:
SAL returned registers.

References mSalProcEntry.

EFI_STATUS EFIAPI UefiSalLibConstructor ( IN EFI_HANDLE  ImageHandle,
IN EFI_SYSTEM_TABLE SystemTable 
)

The constructor function of UEFI SAL Lib.

The constructor function looks up the SAL System Table in the EFI System Configuration Table. Once the SAL System Table is found, the SAL Entry Point in the SAL System Table will be derived and stored into a global variable for library usage. It will ASSERT() if the SAL System Table cannot be found or the data in the SAL System Table is not the valid data.

Parameters:
ImageHandle The firmware allocated handle for the EFI image.
SystemTable A pointer to the EFI System Table.
Return values:
EFI_SUCCESS The constructor always returns EFI_SUCCESS.

References ASSERT, ASSERT_EFI_ERROR, EFI_SAL_ST_ENTRY_POINT, EFI_SUCCESS, EfiGetSystemConfigurationTable(), EFI_PLABEL::EntryPoint, gEfiSalSystemTableGuid, EFI_PLABEL::GP, mSalProcEntry, NULL, SAL_ST_ENTRY_POINT_DESCRIPTOR::SalGlobalDataPointer, SAL_ST_ENTRY_POINT_DESCRIPTOR::SalProcEntry, SAL_ST_ENTRY_POINT_DESCRIPTOR::Type, and VOID.


Variable Documentation

Referenced by SalCall(), and UefiSalLibConstructor().


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