donghengqaz commented on code in PR #11338:
URL: https://github.com/apache/nuttx/pull/11338#discussion_r1419867807


##########
arch/xtensa/src/esp32/esp32_spiflash.c:
##########
@@ -79,6 +79,19 @@
 
 #define SPI_FLASH_ENCRYPT_MIN_SIZE  (16)
 
+#define IBUS1_PAGE_BASE             IROM0_PAGES_START
+#define IBUS1_PAGE_ADRR             SOC_IROM_MASK_LOW
+#define IBUS1_PAGE_START            (IBUS1_PAGE_BASE + 13)
+#define IBUS1_PAGE_END              (IBUS1_PAGE_BASE + 64)

Review Comment:
   These are some MMU groups, each group has 64 MMU units. so each gourp can 
map flash size = 64 * 64KB = 4MB.



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