78 lines
2.4 KiB
C
78 lines
2.4 KiB
C
/** @file
|
|
PEI Chipset Services Library.
|
|
|
|
This file contains only one function that is PeiCsSvcEnableFdWrites().
|
|
The function PeiCsSvcEnableFdWrites() use chipset services to enable/disable
|
|
flash device write access.
|
|
|
|
***************************************************************************
|
|
* Copyright (c) 2012 - 2015, Insyde Software Corp. All Rights Reserved.
|
|
*
|
|
* You may not reproduce, distribute, publish, display, perform, modify, adapt,
|
|
* transmit, broadcast, present, recite, release, license or otherwise exploit
|
|
* any part of this publication in any form, by any means, without the prior
|
|
* written permission of Insyde Software Corporation.
|
|
*
|
|
******************************************************************************
|
|
*/
|
|
|
|
|
|
#include <PiPei.h>
|
|
#include <Library/DebugLib.h>
|
|
#include <Library/PeiServicesLib.h>
|
|
#include <Ppi/H2OPeiChipsetServices.h>
|
|
|
|
STATIC H2O_CHIPSET_SERVICES_PPI *mChipsetSvcPpi = NULL;
|
|
|
|
|
|
/**
|
|
Platform specific function to enable/disable flash device write access.
|
|
|
|
@param[in] EnableWrites TRUE - Enable
|
|
FALSE - Disable
|
|
|
|
@retval EFI_SUCCESS Function returns successfully
|
|
@retval EFI_UNSUPPORTED If the function is not implemented.
|
|
*/
|
|
EFI_STATUS
|
|
EFIAPI
|
|
PeiCsSvcEnableFdWrites (
|
|
IN BOOLEAN EnableWrites
|
|
)
|
|
{
|
|
EFI_STATUS Status;
|
|
H2O_CHIPSET_SERVICES_PPI *ChipsetSvcPpi;
|
|
|
|
if (mChipsetSvcPpi == NULL) {
|
|
ChipsetSvcPpi = NULL;
|
|
|
|
Status = PeiServicesLocatePpi (
|
|
&gH2OChipsetServicesPpiGuid,
|
|
0,
|
|
NULL,
|
|
(VOID **)&ChipsetSvcPpi
|
|
);
|
|
|
|
if (EFI_ERROR(Status)) {
|
|
DEBUG ((EFI_D_ERROR, "H2O PEI Chipset Services can not be found!\n"));
|
|
return EFI_UNSUPPORTED;
|
|
}
|
|
mChipsetSvcPpi = ChipsetSvcPpi;
|
|
} else {
|
|
ChipsetSvcPpi = mChipsetSvcPpi;
|
|
}
|
|
|
|
//
|
|
// Verify that the PPI interface structure contains the function
|
|
// pointer and whether that function pointer is non-NULL. If not, return
|
|
// an error.
|
|
//
|
|
if (ChipsetSvcPpi == NULL ||
|
|
ChipsetSvcPpi->Size < (OFFSET_OF (H2O_CHIPSET_SERVICES_PPI, EnableFdWrites) + sizeof (VOID*)) ||
|
|
ChipsetSvcPpi->EnableFdWrites == NULL) {
|
|
DEBUG ((EFI_D_ERROR, "H2O PEI Chipset Services is NULL or member EnableFdWrites() isn't implement!\n"));
|
|
return EFI_UNSUPPORTED;
|
|
}
|
|
return ChipsetSvcPpi->EnableFdWrites (EnableWrites);
|
|
}
|