powerpc/e500: adjust fdt and ramdisk loading addr

Since kernel uimage is getting bigger,
old fixed loading bases will result in regions overlap.

Add pad for fdt and ramdisk, so that they won't overlap with uimage.
Signed-off-by: NLiu Yu <yu.liu@freescale.com>
Signed-off-by: NAurelien Jarno <aurelien@aurel32.net>

hw/ppce500_mpc8544ds.c

@@ -34,8 +34,10 @@
 
 #define BINARY_DEVICE_TREE_FILE    "mpc8544ds.dtb"
 #define UIMAGE_LOAD_BASE           0
-#define DTB_LOAD_BASE              0x600000
-#define INITRD_LOAD_BASE           0x2000000
+#define DTC_LOAD_PAD               0x500000
+#define DTC_PAD_MASK               0xFFFFF
+#define INITRD_LOAD_PAD            0x2000000
+#define INITRD_PAD_MASK            0xFFFFFF
 
 #define RAM_SIZES_ALIGN            (64UL << 20)
 
@@ -168,8 +170,8 @@ static void mpc8544ds_init(ram_addr_t ram_size,
     target_phys_addr_t entry=0;
     target_phys_addr_t loadaddr=UIMAGE_LOAD_BASE;
     target_long kernel_size=0;
-    target_ulong dt_base=DTB_LOAD_BASE;
-    target_ulong initrd_base=INITRD_LOAD_BASE;
+    target_ulong dt_base = 0;
+    target_ulong initrd_base = 0;
     target_long initrd_size=0;
     int i=0;
     unsigned int pci_irq_nrs[4] = {1, 2, 3, 4};
@@ -244,6 +246,7 @@ static void mpc8544ds_init(ram_addr_t ram_size,
 
     /* Load initrd. */
     if (initrd_filename) {
+        initrd_base = (kernel_size + INITRD_LOAD_PAD) & ~INITRD_PAD_MASK;
         initrd_size = load_image_targphys(initrd_filename, initrd_base,
                                           ram_size - initrd_base);
 
@@ -256,6 +259,7 @@ static void mpc8544ds_init(ram_addr_t ram_size,
 
     /* If we're loading a kernel directly, we must load the device tree too. */
     if (kernel_filename) {
+        dt_base = (kernel_size + DTC_LOAD_PAD) & ~DTC_PAD_MASK;
         if (mpc8544_load_device_tree(dt_base, ram_size,
                     initrd_base, initrd_size, kernel_cmdline) < 0) {
             fprintf(stderr, "couldn't load device tree\n");