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https://github.com/espressif/esp-idf.git
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501af6dfa2
secure_boot: Checks secure boot efuses Closes IDF-2609 See merge request espressif/esp-idf!12148
87 lines
2.6 KiB
C
87 lines
2.6 KiB
C
// Copyright 2017-2020 Espressif Systems (Shanghai) PTE LTD
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#include "esp_efuse.h"
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#include "esp_efuse_utility.h"
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#include "esp_efuse_table.h"
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#include "stdlib.h"
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#include "esp_types.h"
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#include "assert.h"
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#include "esp_err.h"
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#include "esp_log.h"
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#include "soc/efuse_periph.h"
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#include "bootloader_random.h"
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#include "sys/param.h"
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const static char *TAG = "efuse";
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// Contains functions that provide access to efuse fields which are often used in IDF.
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// Returns chip version from efuse
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uint8_t esp_efuse_get_chip_ver(void)
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{
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// should return the same value as bootloader_common_get_chip_revision()
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uint32_t chip_ver = 0;
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// TODO: ESP32S2 does not have this field
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return chip_ver;
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}
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// Returns chip package from efuse
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uint32_t esp_efuse_get_pkg_ver(void)
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{
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uint32_t pkg_ver = 0;
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esp_efuse_read_field_blob(ESP_EFUSE_PKG_VERSION, &pkg_ver, 4);
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return pkg_ver;
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}
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void esp_efuse_write_random_key(uint32_t blk_wdata0_reg)
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{
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uint32_t buf[8];
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uint8_t raw[24];
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bootloader_fill_random(buf, sizeof(buf));
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ESP_LOGV(TAG, "Writing random values to address 0x%08x", blk_wdata0_reg);
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for (int i = 0; i < 8; i++) {
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ESP_LOGV(TAG, "EFUSE_BLKx_WDATA%d_REG = 0x%08x", i, buf[i]);
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REG_WRITE(blk_wdata0_reg + 4 * i, buf[i]);
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}
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bzero(buf, sizeof(buf));
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bzero(raw, sizeof(raw));
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}
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esp_err_t esp_efuse_disable_rom_download_mode(void)
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{
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return esp_efuse_write_field_bit(ESP_EFUSE_DIS_DOWNLOAD_MODE);
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}
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esp_err_t esp_efuse_set_rom_log_scheme(esp_efuse_rom_log_scheme_t log_scheme)
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{
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int cur_log_scheme = 0;
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esp_efuse_read_field_blob(ESP_EFUSE_UART_PRINT_CONTROL, &cur_log_scheme, 2);
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if (!cur_log_scheme) { // not burned yet
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return esp_efuse_write_field_blob(ESP_EFUSE_UART_PRINT_CONTROL, &log_scheme, 2);
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} else {
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return ESP_ERR_INVALID_STATE;
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}
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}
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esp_err_t esp_efuse_enable_rom_secure_download_mode(void)
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{
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if (esp_efuse_read_field_bit(ESP_EFUSE_DIS_DOWNLOAD_MODE)) {
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return ESP_ERR_INVALID_STATE;
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}
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return esp_efuse_write_field_bit(ESP_EFUSE_ENABLE_SECURITY_DOWNLOAD);
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}
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