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/*
* Copyright (c) 2018, Linaro Limited
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* 2. 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 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 <tee_internal_api.h>
#include <tee_internal_api_extensions.h>
#include <logger_ta.h>
/*
* Called when the instance of the TA is created. This is the first call in
* the TA.
*/
TEE_Result TA_CreateEntryPoint(void)
{
DMSG("has been called");
return TEE_SUCCESS;
}
/*
* Called when the instance of the TA is destroyed if the TA has not
* crashed or panicked. This is the last call in the TA.
*/
void TA_DestroyEntryPoint(void)
{
DMSG("has been called");
}
/*
* Called when a new session is opened to the TA. *sess_ctx can be updated
* with a value to be able to identify this session in subsequent calls to the
* TA. In this function you will normally do the global initialization for the
* TA.
*/
TEE_Result TA_OpenSessionEntryPoint(uint32_t param_types,
TEE_Param __maybe_unused params[4],
void __maybe_unused **sess_ctx)
{
uint32_t exp_param_types = TEE_PARAM_TYPES(TEE_PARAM_TYPE_NONE,
TEE_PARAM_TYPE_NONE,
TEE_PARAM_TYPE_NONE,
TEE_PARAM_TYPE_NONE);
if (param_types != exp_param_types)
return TEE_ERROR_BAD_PARAMETERS;
/* Unused parameters */
(void)¶ms;
(void)&sess_ctx;
return TEE_SUCCESS;
}
/*
* Called when a session is closed, sess_ctx hold the value that was
* assigned by TA_OpenSessionEntryPoint().
*/
void TA_CloseSessionEntryPoint(void __maybe_unused *sess_ctx)
{
(void)&sess_ctx; /* Unused parameter */
}
static TEE_Result dec_value(uint32_t param_types,
TEE_Param params[4])
{
uint32_t exp_param_types = TEE_PARAM_TYPES(TEE_PARAM_TYPE_MEMREF_INOUT,
TEE_PARAM_TYPE_NONE,
TEE_PARAM_TYPE_NONE,
TEE_PARAM_TYPE_NONE);
char *iv;
if (param_types != exp_param_types)
return TEE_ERROR_BAD_PARAMETERS;
iv = params[0].memref.buffer;
IMSG("Got value: %s from NW", iv);
return TEE_SUCCESS;
}
/*
* Called when a TA is invoked. sess_ctx hold that value that was
* assigned by TA_OpenSessionEntryPoint(). The rest of the paramters
* comes from normal world.
*/
TEE_Result TA_InvokeCommandEntryPoint(void __maybe_unused *sess_ctx,
uint32_t cmd_id,
uint32_t param_types, TEE_Param params[4])
{
(void)&sess_ctx; /* Unused parameter */
switch (cmd_id) {
case TA_LOGGER_WRITE:
return dec_value(param_types, params);
default:
return TEE_ERROR_BAD_PARAMETERS;
}
return TEE_ERROR_BAD_PARAMETERS;
}
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