feat(startup): add fast boot and fast restart function

components/esp8266/include/esp_fast_boot.h

@@ -0,0 +1,87 @@
+// Copyright 2020-2021 Espressif Systems (Shanghai) PTE LTD
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#pragma once
+
+#ifndef BOOTLOADER_BUILD
+#include "esp_partition.h"
+#endif
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#ifndef BOOTLOADER_BUILD
+/**
+ * @brief Setting target partition as fast boot partition and enable fast boot function.
+ * 
+ * @param partition partition which has image to be booted
+ *
+ * @return
+ *      - 0 on success
+ *      - -EINVAL parameter error
+ *      - -EIO read flash error
+ */
+int esp_fast_boot_enable_partition(const esp_partition_t *partition);
+
+/**
+ * @brief Setting current running partition as fast boot partition and enable fast boot function.
+ *
+ * @return
+ *      - 0 on success
+ *      - -EINVAL current running partition information error
+ *      - -EIO read flash error
+ */
+int esp_fast_boot_enable(void);
+
+/**
+ * @brief Directly running the image which is to be booted after restart.
+ * 
+ * @note It is just like jumping directly from one APP to another one without running ROM bootloader and level 2 bootloader.
+ *       Using this API, system starting up is fastest.
+ *
+ * @return
+ *      - 0 on success
+ *      - -EINVAL booted partition information error
+ *      - -EIO read flash error
+ */
+int esp_fast_boot_restart(void);
+#endif
+
+/**
+ * @brief Disabling fast boot function and bootloader will not boot fast.
+ */
+void esp_fast_boot_disable(void);
+
+/**
+ * @brief Getting fast boot information.
+ * 
+ * @param image_start image startting address in the SPI Flash
+ * @param image_size  image max size in the SPI Flash
+ * @param image_entry image entry address in the SPI Flash
+ * 
+ * @return
+ *      - 0 on success
+ *      - -EINVAL fast boot information error
+ */
+int esp_fast_boot_get_info(uint32_t *image_start, uint32_t *image_size, uint32_t *image_entry);
+
+/**
+ * @brief Printing fast boot information.
+ */
+void esp_fast_boot_print_info(void);
+
+#ifdef __cplusplus
+}
+#endif