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/********************************************************************************/
/* */
/* TPM Platform I/O */
/* Written by Ken Goldman */
/* IBM Thomas J. Watson Research Center */
/* $Id: tpm_platform.c 4621 2011-09-09 20:19:42Z kgoldman $ */
/* */
/* (c) Copyright IBM Corporation 2006, 2010. */
/* */
/* All rights reserved. */
/* */
/* 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. */
/* */
/* Neither the names of the IBM Corporation nor the names of its */
/* contributors may be used to endorse or promote products derived from */
/* this software without specific prior written permission. */
/* */
/* 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 ANY */
/* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT */
/* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE */
/* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */
/********************************************************************************/
#include <stdio.h>
#include <string.h>
#include "tpm_debug.h"
#include "tpm_pcr.h"
#include "tpm_platform.h"
#ifdef TPM_LIBTPMS_CALLBACKS
#include "tpm_library_intern.h"
#endif
#ifndef TPM_IO_LOCALITY
/* TPM_IO_GetLocality() is platform specific code to set the localityModifier before an ordinal is
processed.
Place holder, to be modified for the platform.
*/
TPM_RESULT TPM_IO_GetLocality(TPM_MODIFIER_INDICATOR *localityModifier,
uint32_t tpm_number)
{
TPM_RESULT rc = 0;
#ifdef TPM_LIBTPMS_CALLBACKS
struct libtpms_callbacks *cbs = TPMLIB_GetCallbacks();
/* call user-provided function if available, otherwise execute
default behavior */
if (cbs->tpm_io_getlocality) {
rc = cbs->tpm_io_getlocality(localityModifier, tpm_number);
return rc;
}
#else
tpm_number = tpm_number; /* to silence the compiler */
#endif
if (rc == 0) {
*localityModifier = 0;
printf(" TPM_IO_GetLocality: localityModifier %u\n", *localityModifier);
rc = TPM_LocalityModifier_CheckLegal(*localityModifier);
}
return rc;
}
#endif /* TPM_IO_LOCALITY */
#ifndef TPM_IO_PHYSICAL_PRESENCE
/* TPM_IO_GetPhysicalPresence() is platform specific code to get the hardware physicalPresence
state.
Place holder, to be modified for the platform.
*/
TPM_RESULT TPM_IO_GetPhysicalPresence(TPM_BOOL *physicalPresence,
uint32_t tpm_number)
{
TPM_RESULT rc = 0;
#ifdef TPM_LIBTPMS_CALLBACKS
struct libtpms_callbacks *cbs = TPMLIB_GetCallbacks();
/* call user-provided function if available, otherwise execute
default behavior */
if (cbs->tpm_io_getphysicalpresence) {
rc = cbs->tpm_io_getphysicalpresence(physicalPresence, tpm_number);
return rc;
}
#else
tpm_number = tpm_number; /* to silence the compiler */
#endif
*physicalPresence = FALSE;
return rc;
}
#endif /* TPM_IO_PHYSICAL_PRESENCE */
#ifndef TPM_IO_GPIO
/* TPM_IO_GPIO_Write() should write 'dataSize' bytes of 'data' to 'nvIndex' at the GPIO port.
Place holder, to be modified for the platform.
*/
TPM_RESULT TPM_IO_GPIO_Write(TPM_NV_INDEX nvIndex,
uint32_t dataSize,
BYTE *data,
uint32_t tpm_number)
{
TPM_RESULT rc = 0;
tpm_number = tpm_number; /* to silence the compiler */
#if defined TPM_PCCLIENT /* These values are from the PC Client specification */
printf(" TPM_IO_GPIO_Write: nvIndex %08x\n", nvIndex);
TPM_PrintAll(" TPM_IO_GPIO_Write: Stub", data, dataSize);
/* #elif Add other platform specific values here */
#else /* This is the default case for the main specification */
nvIndex = nvIndex; /* unused parameter, to quiet the compiler */
dataSize = dataSize;
data = data;
printf("TPM_IO_GPIO_Write: Error (fatal), platform does not support GPIO\n");
rc = TPM_FAIL; /* Should never get here. The invalid address be detected earlier */
#endif
return rc;
}
/* TPM_IO_GPIO_Read()
Place holder, to be modified for the platform.
*/
TPM_RESULT TPM_IO_GPIO_Read(TPM_NV_INDEX nvIndex,
uint32_t dataSize,
BYTE *data,
uint32_t tpm_number)
{
TPM_RESULT rc = 0;
tpm_number = tpm_number; /* to silence the compiler */
#if defined TPM_PCCLIENT /* These values are from the PC Client specification */
printf(" TPM_IO_GPIO_Read: nvIndex %08x\n", nvIndex);
memset(data, 0, dataSize);
/* #elif Add other platform specific values here */
#else /* This is the default case for the main specification */
nvIndex = nvIndex;; /* unused parameter, to quiet the compiler */
dataSize = dataSize;;
data = data;
printf("TPM_IO_GPIO_Read: Error (fatal), platform does not support GPIO\n");
rc = TPM_FAIL; /* Should never get here. The invalid address be detected earlier */
#endif
return rc;
}
#endif /* TPM_IO_GPIO */
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