diff --git a/arch/arm/mach-stm32/soc.c b/arch/arm/mach-stm32/soc.c
index 2b52854..738305c 100644
--- a/arch/arm/mach-stm32/soc.c
+++ b/arch/arm/mach-stm32/soc.c
@@ -21,14 +21,9 @@
 		O_I_WB_RD_WR_ALLOC, REGION_16MB },
 #endif
 
-#if defined(CONFIG_STM32F7)
+#if defined(CONFIG_STM32F7) || defined(CONFIG_STM32H7)
 		{ 0xC0000000, REGION_0, XN_DIS, PRIV_RW_USR_RW,
-		O_I_WB_RD_WR_ALLOC, REGION_16MB },
-#endif
-
-#if defined(CONFIG_STM32H7)
-		{ 0xD0000000, REGION_0, XN_DIS, PRIV_RW_USR_RW,
-		O_I_WB_RD_WR_ALLOC, REGION_32MB },
+		O_I_WB_RD_WR_ALLOC, REGION_512MB },
 #endif
 	};