diff options
Diffstat (limited to 'core/arch/arm/kernel/tee_time.c')
| -rw-r--r-- | core/arch/arm/kernel/tee_time.c | 83 |
1 files changed, 83 insertions, 0 deletions
diff --git a/core/arch/arm/kernel/tee_time.c b/core/arch/arm/kernel/tee_time.c new file mode 100644 index 0000000..671a8e9 --- /dev/null +++ b/core/arch/arm/kernel/tee_time.c @@ -0,0 +1,83 @@ +/* + * Copyright (c) 2016, Linaro Limied + * Copyright (c) 2014, STMicroelectronics International N.V. + * 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 <compiler.h> +#include <string.h> +#include <stdlib.h> + +#include <kernel/tee_time.h> +#include <kernel/time_source.h> +#include <kernel/thread.h> +#include <optee_msg.h> +#include <mm/core_mmu.h> + +struct time_source _time_source; + +TEE_Result tee_time_get_sys_time(TEE_Time *time) +{ + return _time_source.get_sys_time(time); +} + +uint32_t tee_time_get_sys_time_protection_level(void) +{ + return _time_source.protection_level; +} + +void tee_time_wait(uint32_t milliseconds_delay) +{ + struct optee_msg_param params; + + memset(¶ms, 0, sizeof(params)); + params.attr = OPTEE_MSG_ATTR_TYPE_VALUE_INPUT; + params.u.value.a = milliseconds_delay; + thread_rpc_cmd(OPTEE_MSG_RPC_CMD_SUSPEND, 1, ¶ms); +} + +/* + * tee_time_get_ree_time(): this function implements the GP Internal API + * function TEE_GetREETime() + * Goal is to get the time of the Rich Execution Environment + * This is why this time is provided through the supplicant + */ +TEE_Result tee_time_get_ree_time(TEE_Time *time) +{ + TEE_Result res; + struct optee_msg_param params; + + if (!time) + return TEE_ERROR_BAD_PARAMETERS; + + memset(¶ms, 0, sizeof(params)); + params.attr = OPTEE_MSG_ATTR_TYPE_VALUE_OUTPUT; + res = thread_rpc_cmd(OPTEE_MSG_RPC_CMD_GET_TIME, 1, ¶ms); + if (res == TEE_SUCCESS) { + time->seconds = params.u.value.a; + time->millis = params.u.value.b / 1000000; + } + + return res; +} |