diff --git a/components/soc/esp32/include/soc/soc.h b/components/soc/esp32/include/soc/soc.h
index 8121e33b0..007a69c90 100644
--- a/components/soc/esp32/include/soc/soc.h
+++ b/components/soc/esp32/include/soc/soc.h
@@ -75,7 +75,9 @@
 #define DR_REG_AES_BASE                         0x3ff01000
 #define DR_REG_RSA_BASE                         0x3ff02000
 #define DR_REG_SHA_BASE                         0x3ff03000
-#define DR_REG_DPORT_END                        0x3ff03FFC
+#define DR_REG_FLASH_MMU_TABLE_PRO              0x3ff10000
+#define DR_REG_FLASH_MMU_TABLE_APP              0x3ff12000
+#define DR_REG_DPORT_END                        0x3ff13FFC
 #define DR_REG_UART_BASE                        0x3ff40000
 #define DR_REG_SPI1_BASE                        0x3ff42000
 #define DR_REG_SPI0_BASE                        0x3ff43000
diff --git a/components/spi_flash/flash_mmap.c b/components/spi_flash/flash_mmap.c
index 52e64c11a..d6b884d33 100644
--- a/components/spi_flash/flash_mmap.c
+++ b/components/spi_flash/flash_mmap.c
@@ -57,6 +57,7 @@
 
    Returns true if cache was flushed.
 */
+
 static bool spi_flash_ensure_unmodified_region(size_t start_addr, size_t length);
 
 typedef struct mmap_entry_{
@@ -78,10 +79,12 @@ static void IRAM_ATTR spi_flash_mmap_init()
     if (s_mmap_page_refcnt[0] != 0) {
         return; /* mmap data already initialised */
     }
-
+    
+    DPORT_STALL_OTHER_CPU_START();
     for (int i = 0; i < REGIONS_COUNT * PAGES_PER_REGION; ++i) {
         uint32_t entry_pro = DPORT_PRO_FLASH_MMU_TABLE[i];
         uint32_t entry_app = DPORT_APP_FLASH_MMU_TABLE[i];
+
         if (entry_pro != entry_app) {
             // clean up entries used by boot loader
             entry_pro = DPORT_FLASH_MMU_TABLE_INVALID_VAL;
@@ -94,6 +97,7 @@ static void IRAM_ATTR spi_flash_mmap_init()
             DPORT_APP_FLASH_MMU_TABLE[i] = DPORT_FLASH_MMU_TABLE_INVALID_VAL;
         }
     }
+    DPORT_STALL_OTHER_CPU_END();
 }
 
 esp_err_t IRAM_ATTR spi_flash_mmap(size_t src_addr, size_t size, spi_flash_mmap_memory_t memory,
@@ -175,6 +179,7 @@ esp_err_t IRAM_ATTR spi_flash_mmap_pages(int *pages, size_t page_count, spi_flas
     for (start = region_begin; start < end; ++start) {
         int pageno = 0;
         int pos;
+        DPORT_STALL_OTHER_CPU_START();
         for (pos = start; pos < start + page_count; ++pos, ++pageno) {
             int table_val = (int) DPORT_PRO_FLASH_MMU_TABLE[pos];
             uint8_t refcnt = s_mmap_page_refcnt[pos]; 
@@ -182,6 +187,7 @@ esp_err_t IRAM_ATTR spi_flash_mmap_pages(int *pages, size_t page_count, spi_flas
                 break;
             }
         }
+        DPORT_STALL_OTHER_CPU_END();
         // whole mapping range matched, bail out
         if (pos - start == page_count) {
             break;
@@ -195,6 +201,7 @@ esp_err_t IRAM_ATTR spi_flash_mmap_pages(int *pages, size_t page_count, spi_flas
     } else {
         // set up mapping using pages
         uint32_t pageno = 0;
+        DPORT_STALL_OTHER_CPU_START();
         for (int i = start; i != start + page_count; ++i, ++pageno) {
             // sanity check: we won't reconfigure entries with non-zero reference count
             assert(s_mmap_page_refcnt[i] == 0 ||
@@ -209,7 +216,7 @@ esp_err_t IRAM_ATTR spi_flash_mmap_pages(int *pages, size_t page_count, spi_flas
             }
             ++s_mmap_page_refcnt[i];
         }
-
+        DPORT_STALL_OTHER_CPU_END();
         LIST_INSERT_HEAD(&s_mmap_entries_head, new_entry, entries);
         new_entry->page = start;
         new_entry->count = page_count;
@@ -250,6 +257,7 @@ void IRAM_ATTR spi_flash_munmap(spi_flash_mmap_handle_t handle)
             // for each page, decrement reference counter
             // if reference count is zero, disable MMU table entry to
             // facilitate debugging of use-after-free conditions
+            DPORT_STALL_OTHER_CPU_START();
             for (int i = it->page; i < it->page + it->count; ++i) {
                 assert(s_mmap_page_refcnt[i] > 0);
                 if (--s_mmap_page_refcnt[i] == 0) {
@@ -257,6 +265,7 @@ void IRAM_ATTR spi_flash_munmap(spi_flash_mmap_handle_t handle)
                     DPORT_APP_FLASH_MMU_TABLE[i] = INVALID_ENTRY_VAL;
                 }
             }
+            DPORT_STALL_OTHER_CPU_END();
             LIST_REMOVE(it, entries);
             break;
         }
@@ -369,7 +378,9 @@ uint32_t spi_flash_cache2phys(const void *cached)
         /* cached address was not in IROM or DROM */
         return SPI_FLASH_CACHE2PHYS_FAIL;
     }
+    DPORT_STALL_OTHER_CPU_START();
     uint32_t phys_page = DPORT_PRO_FLASH_MMU_TABLE[cache_page];
+    DPORT_STALL_OTHER_CPU_END();
     if (phys_page == INVALID_ENTRY_VAL) {
         /* page is not mapped */
         return SPI_FLASH_CACHE2PHYS_FAIL;
@@ -396,13 +407,16 @@ const void *spi_flash_phys2cache(uint32_t phys_offs, spi_flash_mmap_memory_t mem
         base = VADDR1_START_ADDR;
         page_delta = 64;
     }
-
+    
+    DPORT_STALL_OTHER_CPU_START();
     for (int i = start; i < end; i++) {
         if (DPORT_PRO_FLASH_MMU_TABLE[i] == phys_page) {
             i -= page_delta;
             intptr_t cache_page =  base + (SPI_FLASH_MMU_PAGE_SIZE * i);
+            DPORT_STALL_OTHER_CPU_END();
             return (const void *) (cache_page | (phys_offs & (SPI_FLASH_MMU_PAGE_SIZE-1)));
         }
     }
+    DPORT_STALL_OTHER_CPU_END();
     return NULL;
 }