almir-okato commented on code in PR #18195:
URL: https://github.com/apache/nuttx/pull/18195#discussion_r2732776034


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arch/xtensa/src/common/espressif/esp_loader.c:
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@@ -50,6 +50,10 @@
 #  include "esp_rom_uart.h"
 #  include "esp_rom_sys.h"
 #  include "esp_app_format.h"
+#  ifndef CONFIG_ESPRESSIF_SIMPLE_BOOT_IMAGE_OFFSET
+#    define CONFIG_ESPRESSIF_SIMPLE_BOOT_IMAGE_OFFSET \
+            CONFIG_BOOTLOADER_OFFSET_IN_FLASH
+#  endif

Review Comment:
   What I meant is that this image with a 
`CONFIG_ESPRESSIF_SIMPLE_BOOT_IMAGE_OFFSET` set differently from the default 
`CONFIG_BOOTLOADER_OFFSET_IN_FLASH` will not be "standalone directly bootable" 
as the current Simple boot image (single build image and bootable by ROM 
bootloader). 
   So, if you define this different offset, you'll still need a minimum image 
bootable by ROM bootloader (IRAM/DRAM fixed positions) that will then map the 
segments from this offset, unless you tweak some more things I imagine. 
   It seems that this may save some flash space as you said, but it would be 
good to document and specify how `CONFIG_ESPRESSIF_SIMPLE_BOOT_IMAGE_OFFSET` 
may be defined and implement eventual build system and additional code changes.
   



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