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bootloader: Fix esp_get_flash_encryption_mode(). RELEASE = (CRYPT_CNT == max) or (CRYPT_CNT.write_protect == true)

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If the CRYPT_CNT efuse is max it means the same as a write protection bit for this efuse.

Closes: https://github.com/espressif/esp-idf/issues/5747
This commit is contained in:
KonstantinKondrashov 2020-08-24 23:03:53 +08:00
parent 7b7c641076
commit 66acb32665
1 changed files with 12 additions and 3 deletions
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15
components/bootloader_support/src/flash_encrypt.c
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@ -70,14 +70,23 @@ void esp_flash_write_protect_crypt_cnt(void)
esp_flash_enc_mode_t esp_get_flash_encryption_mode(void)
{
uint8_t efuse_flash_crypt_cnt_wr_protected = 0;
uint8_t flash_crypt_cnt_wr_dis = 0;
uint8_t dis_dl_enc = 0, dis_dl_dec = 0, dis_dl_cache = 0;
esp_flash_enc_mode_t mode = ESP_FLASH_ENC_MODE_DEVELOPMENT;
if (esp_flash_encryption_enabled()) {
/* Check if FLASH CRYPT CNT is write protected */
esp_efuse_read_field_blob(ESP_EFUSE_WR_DIS_FLASH_CRYPT_CNT, &efuse_flash_crypt_cnt_wr_protected, 1);
if (efuse_flash_crypt_cnt_wr_protected) {
esp_efuse_read_field_blob(ESP_EFUSE_WR_DIS_FLASH_CRYPT_CNT, &flash_crypt_cnt_wr_dis, 1);
if (!flash_crypt_cnt_wr_dis) {
uint8_t flash_crypt_cnt = 0;
esp_efuse_read_field_blob(ESP_EFUSE_FLASH_CRYPT_CNT, &flash_crypt_cnt, ESP_EFUSE_FLASH_CRYPT_CNT[0]->bit_count);
if (flash_crypt_cnt == (1 << (ESP_EFUSE_FLASH_CRYPT_CNT[0]->bit_count)) - 1) {
flash_crypt_cnt_wr_dis = 1;
}
}
if (flash_crypt_cnt_wr_dis) {
esp_efuse_read_field_blob(ESP_EFUSE_DISABLE_DL_CACHE, &dis_dl_cache, 1);
esp_efuse_read_field_blob(ESP_EFUSE_DISABLE_DL_ENCRYPT, &dis_dl_enc, 1);
esp_efuse_read_field_blob(ESP_EFUSE_DISABLE_DL_DECRYPT, &dis_dl_dec, 1);