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- /*
- * Copyright (c) 2016, 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 <hello_world_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);
- DMSG("has been called");
- if (param_types != exp_param_types)
- return TEE_ERROR_BAD_PARAMETERS;
- /* Unused parameters */
- (void)¶ms;
- (void)&sess_ctx;
- /*
- * The DMSG() macro is non-standard, TEE Internal API doesn't
- * specify any means to logging from a TA.
- */
- IMSG("Hello World!\n");
- /* If return value != TEE_SUCCESS the session will not be created. */
- 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 */
- IMSG("Goodbye!\n");
- }
- static TEE_Result inc_value(uint32_t param_types,
- TEE_Param params[4])
- {
- uint32_t exp_param_types = TEE_PARAM_TYPES(TEE_PARAM_TYPE_VALUE_INOUT,
- TEE_PARAM_TYPE_NONE,
- TEE_PARAM_TYPE_NONE,
- TEE_PARAM_TYPE_NONE);
- DMSG("has been called");
- if (param_types != exp_param_types)
- return TEE_ERROR_BAD_PARAMETERS;
- IMSG("Got value: %u from NW", params[0].value.a);
- params[0].value.a++;
- IMSG("Increase value to: %u", params[0].value.a);
- return TEE_SUCCESS;
- }
- static TEE_Result dec_value(uint32_t param_types,
- TEE_Param params[4])
- {
- uint32_t exp_param_types = TEE_PARAM_TYPES(TEE_PARAM_TYPE_VALUE_INOUT,
- TEE_PARAM_TYPE_NONE,
- TEE_PARAM_TYPE_NONE,
- TEE_PARAM_TYPE_NONE);
- DMSG("has been called");
- if (param_types != exp_param_types)
- return TEE_ERROR_BAD_PARAMETERS;
- IMSG("Got value: %u from NW", params[0].value.a);
- params[0].value.a--;
- IMSG("Decrease value to: %u", params[0].value.a);
- 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_HELLO_WORLD_CMD_INC_VALUE:
- return inc_value(param_types, params);
- case TA_HELLO_WORLD_CMD_DEC_VALUE:
- return dec_value(param_types, params);
- default:
- return TEE_ERROR_BAD_PARAMETERS;
- }
- }
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