9d510e61fc
https://bugzilla.tianocore.org/show_bug.cgi?id=1373 Replace BSD 2-Clause License with BSD+Patent License. This change is based on the following emails: https://lists.01.org/pipermail/edk2-devel/2019-February/036260.html https://lists.01.org/pipermail/edk2-devel/2018-October/030385.html RFCs with detailed process for the license change: V3: https://lists.01.org/pipermail/edk2-devel/2019-March/038116.html V2: https://lists.01.org/pipermail/edk2-devel/2019-March/037669.html V1: https://lists.01.org/pipermail/edk2-devel/2019-March/037500.html Contributed-under: TianoCore Contribution Agreement 1.1 Signed-off-by: Michael D Kinney <michael.d.kinney@intel.com> Reviewed-by: Hao Wu <hao.a.wu@intel.com> Reviewed-by: Jian J Wang <jian.j.wang@intel.com>
37 lines
1.1 KiB
C
37 lines
1.1 KiB
C
/** @file
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ARM implementation of architecture specific routines related to
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PersistAcrossReset capsules
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Copyright (c) 2018, Linaro, Ltd. All rights reserved.<BR>
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Copyright (c) 2019, Intel Corporation. All rights reserved.<BR>
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SPDX-License-Identifier: BSD-2-Clause-Patent
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**/
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#include "CapsuleService.h"
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/**
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Whether the platform supports capsules that persist across reset. Note that
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some platforms only support such capsules at boot time.
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@return TRUE if a PersistAcrossReset capsule may be passed to UpdateCapsule()
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at this time
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FALSE otherwise
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**/
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BOOLEAN
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IsPersistAcrossResetCapsuleSupported (
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VOID
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)
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{
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//
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// ARM requires the capsule payload to be cleaned to the point of coherency
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// (PoC), but only permits doing so using cache maintenance instructions that
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// operate on virtual addresses. Since at runtime, we don't know the virtual
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// addresses of the data structures that make up the scatter/gather list, we
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// cannot perform the maintenance, and all we can do is give up.
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//
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return FeaturePcdGet (PcdSupportUpdateCapsuleReset) && !EfiAtRuntime ();
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}
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