diff --git a/libcpu/aarch64/cortex-a53/mmu.h b/libcpu/aarch64/cortex-a53/mmu.h
index 15e014deb66b9d08c0b43acfb328f14c32fdca3d..61d64164b1e52677046481d67b0581b298c8858e 100644
--- a/libcpu/aarch64/cortex-a53/mmu.h
+++ b/libcpu/aarch64/cortex-a53/mmu.h
@@ -20,6 +20,8 @@
 #define MEM_ATTR_MEMORY ((0x1UL << 10) | (0x2UL << 8) | (0x0UL << 6) | (0x1UL << 2))
 #define MEM_ATTR_IO     ((0x1UL << 10) | (0x2UL << 8) | (0x0UL << 6) | (0x2UL << 2))
 
+#define BUS_ADDRESS(phys)	(((phys) & ~0xC0000000)  |  0xC0000000)
+
 void mmu_init(void);
 
 void mmu_enable(void);