diff --git a/libcpu/arm/cortex-a/start_gcc.S b/libcpu/arm/cortex-a/start_gcc.S
index 68a8099ea8b2fd3ea0a0c319845a1a9864c6fcad..703b34a8ae98602ce6653ac03c8516934468cd57 100644
--- a/libcpu/arm/cortex-a/start_gcc.S
+++ b/libcpu/arm/cortex-a/start_gcc.S
@@ -109,6 +109,19 @@ continue:
     msr cpsr_c, r0
 #endif
 
+    /* invalid tlb before enable mmu */
+    mrc p15, 0, r0, c1, c0, 0
+    bic r0, #1
+    mcr p15, 0, r0, c1, c0, 0
+    dsb
+    isb
+    mov r0, #0
+    mcr p15, 0, r0, c8, c7, 0
+    mcr p15, 0, r0, c7, c5, 0    /* iciallu */
+    mcr p15, 0, r0, c7, c5, 6    /* bpiall */
+    dsb
+    isb
+
 #ifdef RT_USING_USERSPACE
     ldr r5, =PV_OFFSET