/src/ibmswtpm2/src/PowerPlat.c
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1 | | /********************************************************************************/ |
2 | | /* */ |
3 | | /* */ |
4 | | /* Written by Ken Goldman */ |
5 | | /* IBM Thomas J. Watson Research Center */ |
6 | | /* $Id: PowerPlat.c 809 2016-11-16 18:31:54Z kgoldman $ */ |
7 | | /* */ |
8 | | /* Licenses and Notices */ |
9 | | /* */ |
10 | | /* 1. Copyright Licenses: */ |
11 | | /* */ |
12 | | /* - Trusted Computing Group (TCG) grants to the user of the source code in */ |
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16 | | /* derivative works thereof, and to grant others the rights granted herein. */ |
17 | | /* */ |
18 | | /* - The TCG grants to the user of the other parts of the specification */ |
19 | | /* (other than the Source Code) the rights to reproduce, distribute, */ |
20 | | /* display, and perform the specification solely for the purpose of */ |
21 | | /* developing products based on such documents. */ |
22 | | /* */ |
23 | | /* 2. Source Code Distribution Conditions: */ |
24 | | /* */ |
25 | | /* - Redistributions of Source Code must retain the above copyright licenses, */ |
26 | | /* this list of conditions and the following disclaimers. */ |
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28 | | /* - Redistributions in binary form must reproduce the above copyright */ |
29 | | /* licenses, this list of conditions and the following disclaimers in the */ |
30 | | /* documentation and/or other materials provided with the distribution. */ |
31 | | /* */ |
32 | | /* 3. Disclaimers: */ |
33 | | /* */ |
34 | | /* - THE COPYRIGHT LICENSES SET FORTH ABOVE DO NOT REPRESENT ANY FORM OF */ |
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40 | | /* membership agreements. */ |
41 | | /* */ |
42 | | /* - THIS SPECIFICATION IS PROVIDED "AS IS" WITH NO EXPRESS OR IMPLIED */ |
43 | | /* WARRANTIES WHATSOEVER, INCLUDING ANY WARRANTY OF MERCHANTABILITY OR */ |
44 | | /* FITNESS FOR A PARTICULAR PURPOSE, ACCURACY, COMPLETENESS, OR */ |
45 | | /* NONINFRINGEMENT OF INTELLECTUAL PROPERTY RIGHTS, OR ANY WARRANTY */ |
46 | | /* OTHERWISE ARISING OUT OF ANY PROPOSAL, SPECIFICATION OR SAMPLE. */ |
47 | | /* */ |
48 | | /* - Without limitation, TCG and its members and licensors disclaim all */ |
49 | | /* liability, including liability for infringement of any proprietary */ |
50 | | /* rights, relating to use of information in this specification and to the */ |
51 | | /* implementation of this specification, and TCG disclaims all liability for */ |
52 | | /* cost of procurement of substitute goods or services, lost profits, loss */ |
53 | | /* of use, loss of data or any incidental, consequential, direct, indirect, */ |
54 | | /* or special damages, whether under contract, tort, warranty or otherwise, */ |
55 | | /* arising in any way out of use or reliance upon this specification or any */ |
56 | | /* information herein. */ |
57 | | /* */ |
58 | | /* (c) Copyright IBM Corp. and others, 2016 */ |
59 | | /* */ |
60 | | /********************************************************************************/ |
61 | | |
62 | | /* C.7 PowerPlat.c */ |
63 | | /* C.7.1. Includes and Function Prototypes */ |
64 | | #include "PlatformData.h" |
65 | | #include "Platform_fp.h" |
66 | | #include "_TPM_Init_fp.h" |
67 | | /* C.7.2. Functions */ |
68 | | /* C.7.2.1. _plat__Signal_PowerOn() */ |
69 | | /* Signal platform power on */ |
70 | | LIB_EXPORT int |
71 | | _plat__Signal_PowerOn( |
72 | | void |
73 | | ) |
74 | 1 | { |
75 | | // Reset the timer |
76 | 1 | _plat__TimerReset(); |
77 | | // Need to indicate that we lost power |
78 | 1 | s_powerLost = TRUE; |
79 | 1 | return 0; |
80 | 1 | } |
81 | | /* C.7.2.2. _plat__WasPowerLost() */ |
82 | | /* Test whether power was lost before a _TPM_Init(). */ |
83 | | /* This function will clear the hardware indication of power loss before return. This means that |
84 | | there can only be one spot in the TPM code where this value gets read. This method is used here |
85 | | as it is the most difficult to manage in the TPM code and, if the hardware actually works this |
86 | | way, it is hard to make it look like anything else. So, the burden is placed on the TPM code |
87 | | rather than the platform code */ |
88 | | /* Return Values Meaning */ |
89 | | /* TRUE(1) power was lost */ |
90 | | /* FALSE(0) power was not lost */ |
91 | | LIB_EXPORT int |
92 | | _plat__WasPowerLost( |
93 | | void |
94 | | ) |
95 | 1 | { |
96 | 1 | BOOL retVal = s_powerLost; |
97 | 1 | s_powerLost = FALSE; |
98 | 1 | return retVal; |
99 | 1 | } |
100 | | /* C.7.2.3. _plat_Signal_Reset() */ |
101 | | /* This a TPM reset without a power loss. */ |
102 | | LIB_EXPORT int |
103 | | _plat__Signal_Reset( |
104 | | void |
105 | | ) |
106 | 1 | { |
107 | | // Initialize locality |
108 | 1 | s_locality = 0; |
109 | | // Command cancel |
110 | 1 | s_isCanceled = FALSE; |
111 | 1 | _TPM_Init(); |
112 | | // if we are doing reset but did not have a power failure, then we should |
113 | | // not need to reload NV ... |
114 | 1 | return 0; |
115 | 1 | } |
116 | | /* C.7.2.4. _plat__Signal_PowerOff() */ |
117 | | /* Signal platform power off */ |
118 | | LIB_EXPORT void |
119 | | _plat__Signal_PowerOff( |
120 | | void |
121 | | ) |
122 | 0 | { |
123 | | // Prepare NV memory for power off |
124 | 0 | _plat__NVDisable(); |
125 | 0 | return; |
126 | 0 | } |