boot: zephyr: defines FLASH device for external NOR

With CONFIG_STM32_MEMMAP flag get NOR flash 32 bytes header
Read the NOR flash to get header of the image.
The FLASH_DEVICE is now the external NOR defined by
the board device tree to be the first qspi/ospi/xspi instance
(not necessarily zephyr, flash-controller)

Signed-off-by: Francois Ramu <[email protected]>

Author: FRASTM

boot/zephyr/flash_map_extended.c

@@ -20,7 +20,23 @@
 
 BOOT_LOG_MODULE_DECLARE(mcuboot);
 
-#if (!defined(CONFIG_XTENSA) && DT_HAS_CHOSEN(zephyr_flash_controller))
+#if defined(CONFIG_STM32_MEMMAP)
+/* MEMORY MAPPED for XiP on external NOR flash takes the sspi-nor or ospi-nor or qspi-nor device */
+#define FLASH_DEVICE_ID SPI_FLASH_0_ID
+#if DT_NODE_HAS_STATUS(DT_INST(0, st_stm32_xspi_nor), okay)
+#define FLASH_DEVICE_NODE DT_INST(0, st_stm32_xspi_nor)
+#define FLASH_DEVICE_BASE DT_REG_ADDR(DT_INST(0, st_stm32_xspi_nor))
+#elif DT_NODE_HAS_STATUS(DT_INST(0, st_stm32_ospi_nor), okay)
+#define FLASH_DEVICE_NODE DT_INST(0, st_stm32_ospi_nor)
+#define FLASH_DEVICE_BASE DT_REG_ADDR(DT_INST(0, st_stm32_ospi_nor))
+#elif DT_NODE_HAS_STATUS(DT_INST(0, st_stm32_qspi_nor), okay)
+#define FLASH_DEVICE_NODE DT_INST(0, st_stm32_qspi_nor)
+#define FLASH_DEVICE_BASE DT_REG_ADDR(DT_INST(0, st_stm32_qspi_nor))
+#else
+#error "FLASH_DEVICE_NODE could not be determined"
+#endif
+
+#elif (!defined(CONFIG_XTENSA) && DT_HAS_CHOSEN(zephyr_flash_controller))
 #define FLASH_DEVICE_ID SOC_FLASH_0_ID
 #define FLASH_DEVICE_BASE CONFIG_FLASH_BASE_ADDRESS
 #define FLASH_DEVICE_NODE DT_CHOSEN(zephyr_flash_controller)