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Merge branch 'feature/secure_set_efuses_to_prevent_brick_chip' into 'master'

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security: write-protect DIS_ICAHE and DIS_DCACHE

Closes IDF-5177

See merge request espressif/esp-idf!22640
This commit is contained in:
Mahavir Jain
2023-03-29 11:51:09 +08:00
parent 79b92b8576 a3232e4a5b
commit f22daec784
37 changed files with 251 additions and 27 deletions
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8
components/bootloader_support/src/esp32/flash_encryption_secure_features.c
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@@ -79,5 +79,13 @@ esp_err_t esp_flash_encryption_enable_secure_features(void)
esp_efuse_write_field_bit(ESP_EFUSE_WR_DIS_EFUSE_RD_DISABLE);
#endif
#ifndef CONFIG_SECURE_FLASH_SKIP_WRITE_PROTECTION_CACHE
// Set write-protection for DIS_ICACHE to prevent bricking chip in case it will be set accidentally.
// esp32 has DIS_ICACHE. Write-protection bit = 3.
// List of eFuses with the same write protection bit:
// MAC, MAC_CRC, DISABLE_APP_CPU, DISABLE_BT, DIS_CACHE, VOL_LEVEL_HP_INV.
esp_efuse_write_field_bit(ESP_EFUSE_WR_DIS_DIS_CACHE);
#endif
return ESP_OK;
}