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Diffstat (limited to 'src/tpm2/PowerPlat.c')
| -rw-r--r-- | src/tpm2/PowerPlat.c | 128 |
1 files changed, 128 insertions, 0 deletions
diff --git a/src/tpm2/PowerPlat.c b/src/tpm2/PowerPlat.c new file mode 100644 index 0000000..9077a33 --- /dev/null +++ b/src/tpm2/PowerPlat.c @@ -0,0 +1,128 @@ +/********************************************************************************/ +/* */ +/* Platform Power Support */ +/* Written by Ken Goldman */ +/* IBM Thomas J. Watson Research Center */ +/* $Id: PowerPlat.c 1529 2019-11-21 23:29:01Z kgoldman $ */ +/* */ +/* Licenses and Notices */ +/* */ +/* 1. Copyright Licenses: */ +/* */ +/* - Trusted Computing Group (TCG) grants to the user of the source code in */ +/* this specification (the "Source Code") a worldwide, irrevocable, */ +/* nonexclusive, royalty free, copyright license to reproduce, create */ +/* derivative works, distribute, display and perform the Source Code and */ +/* derivative works thereof, and to grant others the rights granted herein. */ +/* */ +/* - The TCG grants to the user of the other parts of the specification */ +/* (other than the Source Code) the rights to reproduce, distribute, */ +/* display, and perform the specification solely for the purpose of */ +/* developing products based on such documents. */ +/* */ +/* 2. Source Code Distribution Conditions: */ +/* */ +/* - Redistributions of Source Code must retain the above copyright licenses, */ +/* this list of conditions and the following disclaimers. */ +/* */ +/* - Redistributions in binary form must reproduce the above copyright */ +/* licenses, this list of conditions and the following disclaimers in the */ +/* documentation and/or other materials provided with the distribution. */ +/* */ +/* 3. Disclaimers: */ +/* */ +/* - THE COPYRIGHT LICENSES SET FORTH ABOVE DO NOT REPRESENT ANY FORM OF */ +/* LICENSE OR WAIVER, EXPRESS OR IMPLIED, BY ESTOPPEL OR OTHERWISE, WITH */ +/* RESPECT TO PATENT RIGHTS HELD BY TCG MEMBERS (OR OTHER THIRD PARTIES) */ +/* THAT MAY BE NECESSARY TO IMPLEMENT THIS SPECIFICATION OR OTHERWISE. */ +/* Contact TCG Administration (admin@trustedcomputinggroup.org) for */ +/* information on specification licensing rights available through TCG */ +/* membership agreements. */ +/* */ +/* - THIS SPECIFICATION IS PROVIDED "AS IS" WITH NO EXPRESS OR IMPLIED */ +/* WARRANTIES WHATSOEVER, INCLUDING ANY WARRANTY OF MERCHANTABILITY OR */ +/* FITNESS FOR A PARTICULAR PURPOSE, ACCURACY, COMPLETENESS, OR */ +/* NONINFRINGEMENT OF INTELLECTUAL PROPERTY RIGHTS, OR ANY WARRANTY */ +/* OTHERWISE ARISING OUT OF ANY PROPOSAL, SPECIFICATION OR SAMPLE. */ +/* */ +/* - Without limitation, TCG and its members and licensors disclaim all */ +/* liability, including liability for infringement of any proprietary */ +/* rights, relating to use of information in this specification and to the */ +/* implementation of this specification, and TCG disclaims all liability for */ +/* cost of procurement of substitute goods or services, lost profits, loss */ +/* of use, loss of data or any incidental, consequential, direct, indirect, */ +/* or special damages, whether under contract, tort, warranty or otherwise, */ +/* arising in any way out of use or reliance upon this specification or any */ +/* information herein. */ +/* */ +/* (c) Copyright IBM Corp. and others, 2016 - 2019 */ +/* */ +/********************************************************************************/ + +/* C.7 PowerPlat.c */ +/* C.7.1. Includes and Function Prototypes */ +#include "Platform.h" +#include "PlatformACT_fp.h" /* added kgold */ +#include "_TPM_Init_fp.h" +/* C.7.2. Functions */ +/* C.7.2.1. _plat__Signal_PowerOn() */ +/* Signal platform power on */ +LIB_EXPORT int +_plat__Signal_PowerOn( + void + ) +{ + // Reset the timer + _plat__TimerReset(); + // Need to indicate that we lost power + s_powerLost = TRUE; + return 0; +} +/* C.7.2.2. _plat__WasPowerLost() */ +/* Test whether power was lost before a _TPM_Init(). */ +/* This function will clear the hardware indication of power loss before return. This means that + there can only be one spot in the TPM code where this value gets read. This method is used here + as it is the most difficult to manage in the TPM code and, if the hardware actually works this + way, it is hard to make it look like anything else. So, the burden is placed on the TPM code + rather than the platform code */ +/* Return Values Meaning */ +/* TRUE(1) power was lost */ +/* FALSE(0) power was not lost */ +LIB_EXPORT int +_plat__WasPowerLost( + void + ) +{ + int retVal = s_powerLost; + s_powerLost = FALSE; + return retVal; +} +/* C.7.2.3. _plat_Signal_Reset() */ +/* This a TPM reset without a power loss. */ +LIB_EXPORT int +_plat__Signal_Reset( + void + ) +{ + // Initialize locality + s_locality = 0; + // Command cancel + s_isCanceled = FALSE; + _TPM_Init(); + // if we are doing reset but did not have a power failure, then we should + // not need to reload NV ... + return 0; +} +/* C.7.2.4. _plat__Signal_PowerOff() */ +/* Signal platform power off */ +LIB_EXPORT void +_plat__Signal_PowerOff( + void + ) +{ + // Prepare NV memory for power off + _plat__NVDisable(0); + // Disable tick ACT tick processing + _plat__ACT_EnableTicks(FALSE); + return; +} |