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Diffstat (limited to 'ta/logger_ta.c')
| -rw-r--r-- | ta/logger_ta.c | 148 |
1 files changed, 148 insertions, 0 deletions
diff --git a/ta/logger_ta.c b/ta/logger_ta.c new file mode 100644 index 0000000..6913f96 --- /dev/null +++ b/ta/logger_ta.c @@ -0,0 +1,148 @@ +/* + * 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 <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); + + 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("Entry log 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 */ + + return TEE_ERROR_BAD_PARAMETERS; +} |