esp-idf/components/esp_hw_support/esp_dpa_protection.c

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/*
* SPDX-FileCopyrightText: 2023 Espressif Systems (Shanghai) CO LTD
*
* SPDX-License-Identifier: Apache-2.0
*/
#include <string.h>
#include "sdkconfig.h"
#include "soc/hp_system_reg.h"
#include "esp_dpa_protection.h"
static inline void esp_crypto_dpa_set_level(esp_crypto_dpa_sec_level_t level)
{
assert(level >= ESP_CRYPTO_DPA_SEC_LEVEL_LOW && level <= ESP_CRYPTO_DPA_SEC_LEVEL_HIGH);
REG_SET_BIT(HP_SYSTEM_SEC_DPA_CONF_REG, HP_SYSTEM_SEC_DPA_CFG_SEL);
REG_SET_FIELD(HP_SYSTEM_SEC_DPA_CONF_REG, HP_SYSTEM_SEC_DPA_LEVEL, level);
}
#if CONFIG_ESP_CRYPTO_DPA_PROTECTION_AT_STARTUP
static void __attribute__((constructor)) esp_crypto_dpa_protection_startup(void)
{
esp_crypto_dpa_set_level(CONFIG_ESP_CRYPTO_DPA_PROTECTION_LEVEL);
}
#endif
void esp_crypto_dpa_protection_enable(esp_crypto_dpa_sec_level_t level)
{
esp_crypto_dpa_set_level(level);
}
void esp_crypto_dpa_protection_disable(void)
{
REG_CLR_BIT(HP_SYSTEM_SEC_DPA_CONF_REG, HP_SYSTEM_SEC_DPA_CFG_SEL);
}
void esp_crypto_dpa_prot_include_impl(void)
{
// Linker hook, exists for no other purpose
}