b26f0cf9ee
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: Laszlo Ersek <lersek@redhat.com>
43 lines
1.2 KiB
C
43 lines
1.2 KiB
C
/** @file
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Shared code for the PEI fw_cfg and DXE fw_cfg instances of the QemuFwCfgS3Lib
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class.
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Copyright (C) 2017, Red Hat, Inc.
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SPDX-License-Identifier: BSD-2-Clause-Patent
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**/
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#include <Library/QemuFwCfgLib.h>
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#include <Library/QemuFwCfgS3Lib.h>
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/**
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Determine if S3 support is explicitly enabled.
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@retval TRUE If S3 support is explicitly enabled. Other functions in this
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library may be called (subject to their individual
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restrictions).
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FALSE Otherwise. This includes unavailability of the firmware
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configuration interface. No other function in this library
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must be called.
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**/
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BOOLEAN
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EFIAPI
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QemuFwCfgS3Enabled (
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VOID
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)
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{
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RETURN_STATUS Status;
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FIRMWARE_CONFIG_ITEM FwCfgItem;
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UINTN FwCfgSize;
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UINT8 SystemStates[6];
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Status = QemuFwCfgFindFile ("etc/system-states", &FwCfgItem, &FwCfgSize);
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if (Status != RETURN_SUCCESS || FwCfgSize != sizeof SystemStates) {
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return FALSE;
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}
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QemuFwCfgSelectItem (FwCfgItem);
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QemuFwCfgReadBytes (sizeof SystemStates, SystemStates);
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return (BOOLEAN) (SystemStates[3] & BIT7);
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}
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