mirror of
https://github.com/CloverHackyColor/CloverBootloader.git
synced 2024-11-28 12:25:19 +01:00
37 lines
1.1 KiB
C
37 lines
1.1 KiB
C
/** @file
|
|
ARM implementation of architecture specific routines related to
|
|
PersistAcrossReset capsules
|
|
|
|
Copyright (c) 2018, Linaro, Ltd. All rights reserved.<BR>
|
|
Copyright (c) 2019, Intel Corporation. All rights reserved.<BR>
|
|
|
|
SPDX-License-Identifier: BSD-2-Clause-Patent
|
|
|
|
**/
|
|
|
|
#include "CapsuleService.h"
|
|
|
|
/**
|
|
Whether the platform supports capsules that persist across reset. Note that
|
|
some platforms only support such capsules at boot time.
|
|
|
|
@return TRUE if a PersistAcrossReset capsule may be passed to UpdateCapsule()
|
|
at this time
|
|
FALSE otherwise
|
|
**/
|
|
BOOLEAN
|
|
IsPersistAcrossResetCapsuleSupported (
|
|
VOID
|
|
)
|
|
{
|
|
//
|
|
// ARM requires the capsule payload to be cleaned to the point of coherency
|
|
// (PoC), but only permits doing so using cache maintenance instructions that
|
|
// operate on virtual addresses. Since at runtime, we don't know the virtual
|
|
// addresses of the data structures that make up the scatter/gather list, we
|
|
// cannot perform the maintenance, and all we can do is give up.
|
|
//
|
|
return FeaturePcdGet (PcdSupportUpdateCapsuleReset) && !EfiAtRuntime ();
|
|
}
|
|
|