xref: /aosp_15_r20/external/ms-tpm-20-ref/TPMCmd/Platform/src/PPPlat.c (revision 5c591343844d1f9da7da26467c4bf7efc8a7a413)

/* Microsoft Reference Implementation for TPM 2.0
 *
 *  The copyright in this software is being made available under the BSD License,
 *  included below. This software may be subject to other third party and
 *  contributor rights, including patent rights, and no such rights are granted
 *  under this license.
 *
 *  Copyright (c) Microsoft Corporation
 *
 *  All rights reserved.
 *
 *  BSD License
 *
 *  Redistribution and use in source and binary forms, with or without modification,
 *  are permitted provided that the following conditions are met:
 *
 *  Redistributions of source code must retain the above copyright notice, this list
 *  of conditions and the following disclaimer.
 *
 *  Redistributions in binary form must reproduce the above copyright notice, this
 *  list of conditions and the following disclaimer in the documentation and/or
 *  other materials provided with the distribution.
 *
 *  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ""AS IS""
 *  AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 *  IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 *  DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
 *  ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 *  (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 *  LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
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 *  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 *  SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
//** Description

//    This module simulates the physical presence interface pins on the TPM.

//** Includes
#include "Platform.h"

//** Functions

//***_plat__PhysicalPresenceAsserted()
// Check if physical presence is signaled
//  Return Type: int
//      TRUE(1)         if physical presence is signaled
//      FALSE(0)        if physical presence is not signaled
LIB_EXPORT int
_plat__PhysicalPresenceAsserted(
    void
    )
{
    // Do not know how to check physical presence without real hardware.
    // so always return TRUE;
    return s_physicalPresence;
}

//***_plat__Signal_PhysicalPresenceOn()
// Signal physical presence on
LIB_EXPORT void
_plat__Signal_PhysicalPresenceOn(
    void
    )
{
    s_physicalPresence = TRUE;
    return;
}

//***_plat__Signal_PhysicalPresenceOff()
// Signal physical presence off
LIB_EXPORT void
_plat__Signal_PhysicalPresenceOff(
    void
    )
{
    s_physicalPresence = FALSE;
    return;
}