diff --git a/components/mm/ioremap.c b/components/mm/ioremap.c
index a3b8a9e1f2eb243b7d21a15f960f128282dc989f..f72a8b93542beded1b606c1513a48bf9a62c4224 100644
--- a/components/mm/ioremap.c
+++ b/components/mm/ioremap.c
@@ -27,6 +27,7 @@ size_t rt_ioremap_size;
 enum ioremap_type
 {
     MM_AREA_TYPE_PHY,
+    MM_AREA_TYPE_PHY_WT,
     MM_AREA_TYPE_PHY_CACHED
 };
 
@@ -52,6 +53,9 @@ static void *_ioremap_type(void *paddr, size_t size, enum ioremap_type type)
     case MM_AREA_TYPE_PHY:
         attr = MMU_MAP_K_DEVICE;
         break;
+    case MM_AREA_TYPE_PHY_WT:
+        attr = MMU_MAP_K_RW;
+        break;
     case MM_AREA_TYPE_PHY_CACHED:
         attr = MMU_MAP_K_RWCB;
         break;
@@ -82,6 +86,11 @@ void *rt_ioremap_nocache(void *paddr, size_t size)
     return _ioremap_type(paddr, size, MM_AREA_TYPE_PHY);
 }
 
+void *rt_ioremap_wt(void *paddr, size_t size)
+{
+    return _ioremap_type(paddr, size, MM_AREA_TYPE_PHY_WT);
+}
+
 void *rt_ioremap_cached(void *paddr, size_t size)
 {
     return _ioremap_type(paddr, size, MM_AREA_TYPE_PHY_CACHED);
diff --git a/components/mm/ioremap.h b/components/mm/ioremap.h
index dc219630a39b82f69b1f4afe2713abe6f84748c8..7ac9d196a9c90caef870f756006e52a6d6fe17cb 100644
--- a/components/mm/ioremap.h
+++ b/components/mm/ioremap.h
@@ -32,7 +32,8 @@ extern "C" {
 
 void *rt_ioremap(void *paddr, size_t size);
 void *rt_ioremap_nocache(void *paddr, size_t size);
-void *rt_ioremap_cached (void *paddr, size_t size);
+void *rt_ioremap_cached(void *paddr, size_t size);
+void *rt_ioremap_wt(void *paddr, size_t size);
 void rt_iounmap(volatile void *addr);
 
 extern void *rt_ioremap_start;