Laukik Hase
77 lines
1.6 KiB
C
77 lines
1.6 KiB
C
/*
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* SPDX-FileCopyrightText: 2024 Espressif Systems (Shanghai) CO LTD
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#include <stdarg.h>
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#include "esp_attr.h"
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#include "esp_private/cache_utils.h"
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#include "freertos/FreeRTOS.h"
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#include "freertos/semphr.h"
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#include "freertos/task.h"
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#include "esp_tee.h"
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#include "secure_service_num.h"
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/* See esp_tee_u2m_switch.S */
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extern uint32_t _u2m_switch(int argc, va_list ap);
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static SemaphoreHandle_t s_tee_mutex;
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static StaticSemaphore_t s_tee_mutex_buf;
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static void init_mutex(void)
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{
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static bool is_first_call = true;
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if (is_first_call) {
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s_tee_mutex = xSemaphoreCreateMutexStatic(&s_tee_mutex_buf);
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is_first_call = false;
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}
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}
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/**
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* TEE interface API used by untrusted side application
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* to call secure service in trusted side
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*/
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uint32_t esp_tee_service_call(int argc, ...)
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{
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init_mutex();
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uint32_t val = UINT32_MAX;
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va_list ap;
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va_start(ap, argc);
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if (xTaskGetSchedulerState() == taskSCHEDULER_RUNNING) {
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if (xSemaphoreTake(s_tee_mutex, portMAX_DELAY) == pdTRUE) {
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val = _u2m_switch(argc, ap);
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xSemaphoreGive(s_tee_mutex);
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}
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} else {
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val = _u2m_switch(argc, ap);
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}
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va_end(ap);
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return val;
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}
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IRAM_ATTR uint32_t esp_tee_service_call_with_noniram_intr_disabled(int argc, ...)
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{
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uint32_t val = UINT32_MAX;
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va_list ap;
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va_start(ap, argc);
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/* NOTE: Disabling the scheduler and non-IRAM residing interrupts */
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spi_flash_op_lock();
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esp_intr_noniram_disable();
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val = _u2m_switch(argc, ap);
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esp_intr_noniram_enable();
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spi_flash_op_unlock();
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va_end(ap);
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return val;
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}
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