/** @file Serial I/O Port library implementation for the HDMI I2C Debug Port DXE Library implementation Copyright (c) 2022, Intel Corporation. All rights reserved.
SPDX-License-Identifier: BSD-2-Clause-Patent **/ #include #include #include STATIC EFI_TPL mPreviousTpl = 0; /** For boot phases that utilize task priority levels (TPLs), this function raises the TPL to the appriopriate level needed to execute I/O to the I2C Debug Port **/ VOID RaiseTplForI2cDebugPortAccess ( VOID ) { if (EfiGetCurrentTpl () < TPL_NOTIFY) { mPreviousTpl = gBS->RaiseTPL (TPL_NOTIFY); } } /** For boot phases that utilize task priority levels (TPLs), this function restores the TPL to the previous level after I/O to the I2C Debug Port is complete **/ VOID RestoreTplAfterI2cDebugPortAccess ( VOID ) { if (mPreviousTpl > 0) { gBS->RestoreTPL (mPreviousTpl); mPreviousTpl = 0; } }