allwinner: Express memmap more dynamically

In preparation for changing the memory map, express the locations of the
various code and data pieces more dynamically, allowing SoCs to override
the memmap later.
Also prepare for the SCP region to become optional.

No functional change.

Change-Id: I7ac01e309be2f23bde2ac2050d8d5b5e3d6efea2
Signed-off-by: Andre Przywara <andre.przywara@arm.com>

plat/allwinner/common/include/platform_def.h

@@ -13,18 +13,27 @@
 
 #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
+#else	/* !SUNXI_BL31_IN_DRAM */
+
 #define BL31_BASE			(SUNXI_SRAM_A2_BASE + 0x4000)
 #define BL31_LIMIT			(SUNXI_SRAM_A2_BASE + \
 					 SUNXI_SRAM_A2_SIZE - SUNXI_SCP_SIZE)
-
-/* The SCP firmware is allocated the last 16KiB of SRAM A2. */
 #define SUNXI_SCP_BASE			BL31_LIMIT
-#define SUNXI_SCP_SIZE			0x4000
 
 /* Overwrite U-Boot SPL, but reserve the first page for the SPL header. */
 #define BL31_NOBITS_BASE		(SUNXI_SRAM_A1_BASE + 0x1000)
 #define BL31_NOBITS_LIMIT		(SUNXI_SRAM_A1_BASE + SUNXI_SRAM_A1_SIZE)
 
+#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)
+
+#endif /* SUNXI_BL31_IN_DRAM */
+
 /* How much memory to reserve as secure for BL32, if configured */
 #define SUNXI_DRAM_SEC_SIZE		(32U << 20)
 
@@ -35,7 +44,6 @@
 #define CACHE_WRITEBACK_GRANULE		(1 << CACHE_WRITEBACK_SHIFT)
 
 #define MAX_MMAP_REGIONS		(3 + PLATFORM_MMAP_REGIONS)
-#define MAX_XLAT_TABLES			1
 
 #define PLAT_CSS_SCP_COM_SHARED_MEM_BASE \
 	(SUNXI_SRAM_A2_BASE + SUNXI_SRAM_A2_SIZE - 0x200)
@@ -50,7 +58,6 @@
 					 PLATFORM_CORE_COUNT)
 
 #define PLAT_PHY_ADDR_SPACE_SIZE	(1ULL << 32)
-#define PLAT_VIRT_ADDR_SPACE_SIZE	(1ULL << 28)
 
 #define PLATFORM_CLUSTER_COUNT		U(1)
 #define PLATFORM_CORE_COUNT		(PLATFORM_CLUSTER_COUNT * \

plat/allwinner/common/sunxi_bl31_setup.c

@@ -52,7 +52,7 @@ static void *sunxi_find_dtb(void)
 	uint64_t *u_boot_base;
 	int i;
 
-	u_boot_base = (void *)(SUNXI_DRAM_VIRT_BASE + SUNXI_DRAM_SEC_SIZE);
+	u_boot_base = (void *)SUNXI_BL33_VIRT_BASE;
 
 	for (i = 0; i < 2048 / sizeof(uint64_t); i++) {
 		uint32_t *dtb_base;

plat/allwinner/common/sunxi_common.c

@@ -17,16 +17,16 @@
 static const mmap_region_t sunxi_mmap[PLATFORM_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_DRAM_VIRT_BASE + SUNXI_DRAM_SEC_SIZE,
-		   SUNXI_DRAM_MAP_SIZE,
-		   MT_RO_DATA | MT_NS),
+	MAP_REGION(PRELOADED_BL33_BASE, SUNXI_BL33_VIRT_BASE,
+		   SUNXI_DRAM_MAP_SIZE, MT_RO_DATA | MT_NS),
 	{},
 };