mirror of https://github.com/acidanthera/audk.git
74 lines
2.9 KiB
C
74 lines
2.9 KiB
C
/** @file
|
|
PAL Library Class implementation built upon Extended SAL Procedures.
|
|
|
|
Copyright (c) 2007 - 2011, Intel Corporation. All rights reserved.<BR>
|
|
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.
|
|
|
|
**/
|
|
|
|
#include <PiDxe.h>
|
|
|
|
#include <Protocol/ExtendedSalServiceClasses.h>
|
|
|
|
#include <Library/PalLib.h>
|
|
#include <Library/ExtendedSalLib.h>
|
|
|
|
/**
|
|
Makes a PAL procedure call.
|
|
|
|
This is a wrapper function to make a PAL procedure call. Based on the Index value,
|
|
this API will make static or stacked PAL call. Architected procedures may be designated
|
|
as required or optional. If a PAL procedure is specified as optional, a unique return
|
|
code of 0xFFFFFFFFFFFFFFFF is returned in the Status field of the PAL_CALL_RETURN structure.
|
|
This indicates that the procedure is not present in this PAL implementation. It is the
|
|
caller's responsibility to check for this return code after calling any optional PAL
|
|
procedure. No parameter checking is performed on the 4 input parameters, but there are
|
|
some common rules that the caller should follow when making a PAL call. Any address
|
|
passed to PAL 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.
|
|
|
|
@param Index - The PAL procedure Index number.
|
|
@param Arg2 - The 2nd parameter for PAL procedure calls.
|
|
@param Arg3 - The 3rd parameter for PAL procedure calls.
|
|
@param Arg4 - The 4th parameter for PAL procedure calls.
|
|
|
|
@return structure returned from the PAL Call procedure, including the status and return value.
|
|
|
|
**/
|
|
PAL_CALL_RETURN
|
|
EFIAPI
|
|
PalCall (
|
|
IN UINT64 Index,
|
|
IN UINT64 Arg2,
|
|
IN UINT64 Arg3,
|
|
IN UINT64 Arg4
|
|
)
|
|
{
|
|
SAL_RETURN_REGS SalReturn;
|
|
PAL_CALL_RETURN *PalReturn;
|
|
|
|
SalReturn = EsalCall (
|
|
EFI_EXTENDED_SAL_PAL_SERVICES_PROTOCOL_GUID_LO,
|
|
EFI_EXTENDED_SAL_PAL_SERVICES_PROTOCOL_GUID_HI,
|
|
PalProcFunctionId,
|
|
Index,
|
|
Arg2,
|
|
Arg3,
|
|
Arg4,
|
|
0,
|
|
0,
|
|
0
|
|
);
|
|
PalReturn = (PAL_CALL_RETURN *) (UINTN) (&SalReturn);
|
|
return *PalReturn;
|
|
}
|