bootloader_flash: add custom version

BOOTLOADER_BUILD definition is present in source code
to define whether flash access (read/write/erase) are
done using ROM apis or not.

In esp-idf, where 2nd stage bootloader does not run on top
of FreeRTOS, all flash access are performed over ROM calls.

In Zephyr, there are 2 possible scenarios for code initialization:
Using Simple Boot or MCUBoot.

MCUBoot is a Zephyr application that requires flash APIs (not ROM)
to be available for all operations.

Simple Boot bootloader is part of the application and requires
flash access using ROM API, otherwise it can't read data properly.

Instead of using BOOTLOADER_BUILD as a definition to allow
both bootloaders to be used, we can create a custom
bootloader_flash.c file and append "_rom" for flash calls
used in Simple Boot.

Signed-off-by: Sylvio Alves <[email protected]>

Author: sylvioalves

components/bootloader_support/bootloader_flash/include/bootloader_flash_priv.h

@@ -89,6 +89,8 @@ uint32_t bootloader_mmap_get_free_pages(void);
  */
 const void *bootloader_mmap(uint32_t src_addr, uint32_t size);
 
+/* use ROM functions to mmap */
+const void *bootloader_mmap_rom(uint32_t src_addr, uint32_t size);
 
 /**
  * @brief Unmap a previously mapped region of flash
@@ -97,6 +99,9 @@ const void *bootloader_mmap(uint32_t src_addr, uint32_t size);
  */
 void bootloader_munmap(const void *mapping);
 
+/* use ROM functions to unmmap */
+void bootloader_munmap_rom(const void *mapping);
+
 /**
  * @brief  Read data from Flash.
  *
@@ -114,6 +119,8 @@ void bootloader_munmap(const void *mapping);
  */
 esp_err_t bootloader_flash_read(size_t src_addr, void *dest, size_t size, bool allow_decrypt);
 
+/* use ROM functions to flash read */
+esp_err_t bootloader_flash_read_rom(size_t src_addr, void *dest, size_t size, bool allow_decrypt);
 
 /**
  * @brief  Write data to Flash.
@@ -132,6 +139,9 @@ esp_err_t bootloader_flash_read(size_t src_addr, void *dest, size_t size, bool a
  */
 esp_err_t bootloader_flash_write(size_t dest_addr, void *src, size_t size, bool write_encrypted);
 
+/* use ROM functions to flash write */
+esp_err_t bootloader_flash_write_rom(size_t dest_addr, void *src, size_t size, bool write_encrypted);
+
 /**
  * @brief  Erase the Flash sector.
  *
@@ -141,6 +151,9 @@ esp_err_t bootloader_flash_write(size_t dest_addr, void *src, size_t size, bool
  */
 esp_err_t bootloader_flash_erase_sector(size_t sector);
 
+/* use ROM functions to flash erase */
+esp_err_t bootloader_flash_erase_sector_rom(size_t sector);
+
 /**
  * @brief  Erase the Flash range.
  *
@@ -151,6 +164,9 @@ esp_err_t bootloader_flash_erase_sector(size_t sector);
  */
 esp_err_t bootloader_flash_erase_range(uint32_t start_addr, uint32_t size);
 
+/* use ROM functions to flash range read */
+esp_err_t bootloader_flash_erase_range_rom(uint32_t start_addr, uint32_t size);
+
 /**
  * @brief Execute a user command on the flash
  *