diff --git a/include/common/bl_common.h b/include/common/bl_common.h
index 77fb1f679..e33840c9d 100644
--- a/include/common/bl_common.h
+++ b/include/common/bl_common.h
@@ -106,6 +106,10 @@ IMPORT_SYM(uintptr_t, __RODATA_END__,		BL_RO_DATA_END);
 IMPORT_SYM(uintptr_t, __RO_START__,		BL_CODE_BASE);
 IMPORT_SYM(uintptr_t, __RO_END__,		BL_CODE_END);
 #endif
+#if SEPARATE_NOBITS_REGION
+IMPORT_SYM(uintptr_t, __NOBITS_START__,		BL_NOBITS_BASE);
+IMPORT_SYM(uintptr_t, __NOBITS_END__,		BL_NOBITS_END);
+#endif
 IMPORT_SYM(uintptr_t, __RW_END__,		BL_END);
 
 #if defined(IMAGE_BL1)
diff --git a/plat/allwinner/common/include/platform_def.h b/plat/allwinner/common/include/platform_def.h
index 4893368c2..56a2ad6f7 100644
--- a/plat/allwinner/common/include/platform_def.h
+++ b/plat/allwinner/common/include/platform_def.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2017-2019, ARM Limited and Contributors. All rights reserved.
+ * Copyright (c) 2017-2020, ARM Limited and Contributors. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
@@ -13,9 +13,6 @@
 
 #include <sunxi_mmap.h>
 
-/* The SCP firmware is allocated the last 16KiB of SRAM A2. */
-#define SUNXI_SCP_SIZE			0x4000
-
 #ifdef SUNXI_BL31_IN_DRAM
 
 #define BL31_BASE			SUNXI_DRAM_BASE
@@ -31,7 +28,6 @@
 #define BL31_BASE			(SUNXI_SRAM_A2_BASE + 0x4000)
 #define BL31_LIMIT			(SUNXI_SRAM_A2_BASE + \
 					 SUNXI_SRAM_A2_SIZE - SUNXI_SCP_SIZE)
-#define SUNXI_SCP_BASE			BL31_LIMIT
 
 /* Overwrite U-Boot SPL, but reserve the first page for the SPL header. */
 #define BL31_NOBITS_BASE		(SUNXI_SRAM_A1_BASE + 0x1000)
@@ -39,20 +35,23 @@
 
 #define MAX_XLAT_TABLES			1
 #define PLAT_VIRT_ADDR_SPACE_SIZE	(1ULL << 28)
-#define SUNXI_BL33_VIRT_BASE		(SUNXI_DRAM_VIRT_BASE + SUNXI_DRAM_SEC_SIZE)
+
+#define SUNXI_BL33_VIRT_BASE		SUNXI_DRAM_VIRT_BASE
+
+/* The SCP firmware is allocated the last 16KiB of SRAM A2. */
+#define SUNXI_SCP_BASE			BL31_LIMIT
+#define SUNXI_SCP_SIZE			0x4000
 
 #endif /* SUNXI_BL31_IN_DRAM */
 
-/* How much memory to reserve as secure for BL32, if configured */
-#define SUNXI_DRAM_SEC_SIZE		(32U << 20)
-
 /* How much DRAM to map (to map BL33, for fetching the DTB from U-Boot) */
 #define SUNXI_DRAM_MAP_SIZE		(64U << 20)
 
 #define CACHE_WRITEBACK_SHIFT		6
 #define CACHE_WRITEBACK_GRANULE		(1 << CACHE_WRITEBACK_SHIFT)
 
-#define MAX_MMAP_REGIONS		(3 + PLATFORM_MMAP_REGIONS)
+#define MAX_STATIC_MMAP_REGIONS		3
+#define MAX_MMAP_REGIONS		(5 + MAX_STATIC_MMAP_REGIONS)
 
 #define PLAT_CSS_SCP_COM_SHARED_MEM_BASE \
 	(SUNXI_SRAM_A2_BASE + SUNXI_SRAM_A2_SIZE - 0x200)
@@ -72,7 +71,6 @@
 #define PLATFORM_CORE_COUNT		(PLATFORM_CLUSTER_COUNT * \
 					 PLATFORM_MAX_CPUS_PER_CLUSTER)
 #define PLATFORM_MAX_CPUS_PER_CLUSTER	U(4)
-#define PLATFORM_MMAP_REGIONS		5
 #define PLATFORM_STACK_SIZE		(0x1000 / PLATFORM_CORE_COUNT)
 
 #ifndef SPD_none
diff --git a/plat/allwinner/common/sunxi_common.c b/plat/allwinner/common/sunxi_common.c
index d47d3605b..82410b1ed 100644
--- a/plat/allwinner/common/sunxi_common.c
+++ b/plat/allwinner/common/sunxi_common.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2017-2019, ARM Limited and Contributors. All rights reserved.
+ * Copyright (c) 2017-2020, ARM Limited and Contributors. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
@@ -14,17 +14,11 @@
 #include <sunxi_mmap.h>
 #include <sunxi_private.h>
 
-static const mmap_region_t sunxi_mmap[PLATFORM_MMAP_REGIONS + 1] = {
+static const mmap_region_t sunxi_mmap[MAX_STATIC_MMAP_REGIONS + 1] = {
 	MAP_REGION_FLAT(SUNXI_SRAM_BASE, SUNXI_SRAM_SIZE,
-			MT_RW_DATA | MT_SECURE),
-#ifdef SUNXI_SCP_BASE
-	MAP_REGION_FLAT(SUNXI_SCP_BASE, SUNXI_SCP_SIZE,
 			MT_DEVICE | MT_RW | MT_SECURE | MT_EXECUTE_NEVER),
-#endif
 	MAP_REGION_FLAT(SUNXI_DEV_BASE, SUNXI_DEV_SIZE,
 			MT_DEVICE | MT_RW | MT_SECURE | MT_EXECUTE_NEVER),
-	MAP_REGION(SUNXI_DRAM_BASE, SUNXI_DRAM_VIRT_BASE, SUNXI_DRAM_SEC_SIZE,
-		   MT_RW_DATA | MT_SECURE),
 	MAP_REGION(PRELOADED_BL33_BASE, SUNXI_BL33_VIRT_BASE,
 		   SUNXI_DRAM_MAP_SIZE, MT_RW_DATA | MT_NS),
 	{},
@@ -40,12 +34,24 @@ void sunxi_configure_mmu_el3(int flags)
 	mmap_add_region(BL_CODE_BASE, BL_CODE_BASE,
 			BL_CODE_END - BL_CODE_BASE,
 			MT_CODE | MT_SECURE);
+	mmap_add_region(BL_CODE_END, BL_CODE_END,
+			BL_END - BL_CODE_END,
+			MT_RW_DATA | MT_SECURE);
+#if SEPARATE_CODE_AND_RODATA
 	mmap_add_region(BL_RO_DATA_BASE, BL_RO_DATA_BASE,
 			BL_RO_DATA_END - BL_RO_DATA_BASE,
 			MT_RO_DATA | MT_SECURE);
+#endif
+#if SEPARATE_NOBITS_REGION
+	mmap_add_region(BL_NOBITS_BASE, BL_NOBITS_BASE,
+			BL_NOBITS_END - BL_NOBITS_BASE,
+			MT_RW_DATA | MT_SECURE);
+#endif
+#if USE_COHERENT_MEM
 	mmap_add_region(BL_COHERENT_RAM_BASE, BL_COHERENT_RAM_BASE,
 			BL_COHERENT_RAM_END - BL_COHERENT_RAM_BASE,
 			MT_DEVICE | MT_RW | MT_SECURE | MT_EXECUTE_NEVER);
+#endif
 
 	mmap_add(sunxi_mmap);
 	init_xlat_tables();
diff --git a/plat/allwinner/common/sunxi_scpi_pm.c b/plat/allwinner/common/sunxi_scpi_pm.c
index 74763ef7e..eb37daa63 100644
--- a/plat/allwinner/common/sunxi_scpi_pm.c
+++ b/plat/allwinner/common/sunxi_scpi_pm.c
@@ -212,7 +212,6 @@ int sunxi_set_scpi_psci_ops(const plat_psci_ops_t **psci_ops)
 		uint32_t offset = SUNXI_SCP_BASE - vector;
 
 		mmio_write_32(vector, offset >> 2);
-		clean_dcache_range(vector, sizeof(uint32_t));
 	}
 
 	/* Take the SCP out of reset. */
diff --git a/plat/allwinner/sun50i_a64/sunxi_power.c b/plat/allwinner/sun50i_a64/sunxi_power.c
index 0fdb62d05..a35b9ddc0 100644
--- a/plat/allwinner/sun50i_a64/sunxi_power.c
+++ b/plat/allwinner/sun50i_a64/sunxi_power.c
@@ -244,7 +244,6 @@ void sunxi_cpu_power_off_self(void)
 	 * in instruction granularity (32 bits).
 	 */
 	mmio_write_32(arisc_reset_vec, ((uintptr_t)code - arisc_reset_vec) / 4);
-	clean_dcache_range(arisc_reset_vec, 4);
 
 	/* De-assert the arisc reset line to let it run. */
 	mmio_setbits_32(SUNXI_R_CPUCFG_BASE, BIT(0));