diff --git a/arch/arm/include/asm/page.h b/arch/arm/include/asm/page.h
index 11b058a72a5b..cb9c058399d1 100644
--- a/arch/arm/include/asm/page.h
+++ b/arch/arm/include/asm/page.h
@@ -155,6 +155,9 @@ typedef struct page *pgtable_t;
 
 #ifdef CONFIG_HAVE_ARCH_PFN_VALID
 extern int pfn_valid(unsigned long);
+#if IS_ENABLED(CONFIG_AMLOGIC_DMC_MONITOR_BREAK_GKI)
+extern int pfn_is_map_memory(unsigned long pfn);
+#endif
 #endif
 
 #include <asm/memory.h>
diff --git a/arch/arm/mm/init.c b/arch/arm/mm/init.c
index 6d04cb75d26b..0f16cece0fc0 100644
--- a/arch/arm/mm/init.c
+++ b/arch/arm/mm/init.c
@@ -147,6 +147,19 @@ int pfn_valid(unsigned long pfn)
 	return 0;
 }
 EXPORT_SYMBOL(pfn_valid);
+
+#if IS_ENABLED(CONFIG_AMLOGIC_DMC_MONITOR_BREAK_GKI)
+int pfn_is_map_memory(unsigned long pfn)
+{
+	phys_addr_t addr = __pfn_to_phys(pfn);
+
+	if (pfn_valid(pfn))
+		return memblock_is_map_memory(addr);
+
+	return 0;
+}
+EXPORT_SYMBOL(pfn_is_map_memory);
+#endif
 #endif
 
 static bool arm_memblock_steal_permitted = true;