a33a2f6221
Contributed-under: TianoCore Contribution Agreement 1.0 Signed off by: Jiewen Yao <jiewen.yao@intel.com> Reviewed by: Ravi Rangarajan <ravi.p.rangarajan@intel.com> Reviewed by: Maurice Ma <maurice.ma@intel.com> Reviewed by: Giri Mudusuru <giri.p.mudusuru@intel.com> Reviewed by: Liming Gao <liming.gao@intel.com> git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@15676 6f19259b-4bc3-4df7-8a09-765794883524
85 lines
2.9 KiB
C
85 lines
2.9 KiB
C
/** @file
|
|
Sample to provide SecPlatformInformation function.
|
|
|
|
Copyright (c) 2014, 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 <PiPei.h>
|
|
|
|
#include <Ppi/SecPlatformInformation.h>
|
|
#include <Ppi/TopOfTemporaryRam.h>
|
|
|
|
#include <Library/BaseMemoryLib.h>
|
|
#include <Library/DebugLib.h>
|
|
|
|
/**
|
|
This interface conveys state information out of the Security (SEC) phase into PEI.
|
|
|
|
@param[in] PeiServices Pointer to the PEI Services Table.
|
|
@param[in,out] StructureSize Pointer to the variable describing size of the input buffer.
|
|
@param[out] PlatformInformationRecord Pointer to the EFI_SEC_PLATFORM_INFORMATION_RECORD.
|
|
|
|
@retval EFI_SUCCESS The data was successfully returned.
|
|
@retval EFI_BUFFER_TOO_SMALL The buffer was too small.
|
|
|
|
**/
|
|
EFI_STATUS
|
|
EFIAPI
|
|
SecPlatformInformation (
|
|
IN CONST EFI_PEI_SERVICES **PeiServices,
|
|
IN OUT UINT64 *StructureSize,
|
|
OUT EFI_SEC_PLATFORM_INFORMATION_RECORD *PlatformInformationRecord
|
|
)
|
|
{
|
|
UINT32 *Bist;
|
|
UINT32 Size;
|
|
UINT32 Count;
|
|
UINT32 TopOfTemporaryRam;
|
|
VOID *TopOfTemporaryRamPpi;
|
|
EFI_STATUS Status;
|
|
|
|
DEBUG ((DEBUG_INFO, "SecPlatformInformation\n"));
|
|
|
|
Status = (*PeiServices)->LocatePpi (
|
|
PeiServices,
|
|
&gTopOfTemporaryRamPpiGuid,
|
|
0,
|
|
NULL,
|
|
(VOID **) &TopOfTemporaryRamPpi
|
|
);
|
|
if (EFI_ERROR (Status)) {
|
|
return EFI_NOT_FOUND;
|
|
}
|
|
|
|
//
|
|
// The entries of BIST information, together with the number of them,
|
|
// reside in the bottom of stack, left untouched by normal stack operation.
|
|
// This routine copies the BIST information to the buffer pointed by
|
|
// PlatformInformationRecord for output.
|
|
//
|
|
TopOfTemporaryRam = (UINT32)(UINTN)TopOfTemporaryRamPpi - sizeof (UINT32);
|
|
TopOfTemporaryRam -= sizeof(UINT32) * 2;
|
|
Count = *((UINT32 *)(UINTN) (TopOfTemporaryRam - sizeof (UINT32)));
|
|
Size = Count * sizeof (IA32_HANDOFF_STATUS);
|
|
|
|
if ((*StructureSize) < (UINT64) Size) {
|
|
*StructureSize = Size;
|
|
return EFI_BUFFER_TOO_SMALL;
|
|
}
|
|
|
|
*StructureSize = Size;
|
|
Bist = (UINT32 *) (TopOfTemporaryRam - sizeof (UINT32) - Size);
|
|
|
|
CopyMem (PlatformInformationRecord, Bist, Size);
|
|
|
|
return EFI_SUCCESS;
|
|
}
|