115 lines
3.5 KiB
C
115 lines
3.5 KiB
C
/* Microsoft Reference Implementation for TPM 2.0
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*
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* The copyright in this software is being made available under the BSD License,
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* included below. This software may be subject to other third party and
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* contributor rights, including patent rights, and no such rights are granted
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* under this license.
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*
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* Copyright (c) Microsoft Corporation
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*
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* All rights reserved.
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*
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* BSD License
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*
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* Redistribution and use in source and binary forms, with or without modification,
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* are permitted provided that the following conditions are met:
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*
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* Redistributions of source code must retain the above copyright notice, this list
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* of conditions and the following disclaimer.
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*
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* Redistributions in binary form must reproduce the above copyright notice, this
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* list of conditions and the following disclaimer in the documentation and/or
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* other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ""AS IS""
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
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* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
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* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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//** Includes and Function Prototypes
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#include "Platform.h"
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#include "_TPM_Init_fp.h"
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//** Functions
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//***_plat__Signal_PowerOn()
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// Signal platform power on
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LIB_EXPORT int
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_plat__Signal_PowerOn(
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void
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)
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{
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// Reset the timer
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_plat__TimerReset();
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// Need to indicate that we lost power
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s_powerLost = TRUE;
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return 0;
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}
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//*** _plat__WasPowerLost()
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// Test whether power was lost before a _TPM_Init.
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//
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// This function will clear the "hardware" indication of power loss before return.
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// This means that there can only be one spot in the TPM code where this value
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// gets read. This method is used here as it is the most difficult to manage in the
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// TPM code and, if the hardware actually works this way, it is hard to make it
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// look like anything else. So, the burden is placed on the TPM code rather than the
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// platform code
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// Return Type: int
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// TRUE(1) power was lost
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// FALSE(0) power was not lost
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LIB_EXPORT int
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_plat__WasPowerLost(
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void
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)
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{
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int retVal = s_powerLost;
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s_powerLost = FALSE;
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return retVal;
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}
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//*** _plat_Signal_Reset()
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// This a TPM reset without a power loss.
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LIB_EXPORT int
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_plat__Signal_Reset(
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void
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)
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{
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// Initialize locality
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s_locality = 0;
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// Command cancel
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s_isCanceled = FALSE;
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_TPM_Init();
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// if we are doing reset but did not have a power failure, then we should
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// not need to reload NV ...
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return 0;
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}
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//***_plat__Signal_PowerOff()
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// Signal platform power off
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LIB_EXPORT void
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_plat__Signal_PowerOff(
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void
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)
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{
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// Prepare NV memory for power off
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_plat__NVDisable(0);
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// Disable tick ACT tick processing
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_plat__ACT_EnableTicks(FALSE);
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return;
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} |