powerpc/booke: move fdt loading to rom infrastructure

It's convinent to use rom to checking overlap, to reset etc.
And uImage and ramdisk loading has already moved to it.

Also, after we add fdt to rom, free it.
Signed-off-by: NLiu Yu <yu.liu@freescale.com>
Signed-off-by: NAurelien Jarno <aurelien@aurel32.net>

hw/ppc440_bamboo.c

@@ -27,7 +27,7 @@
 
 #define BINARY_DEVICE_TREE_FILE "bamboo.dtb"
 
-static void *bamboo_load_device_tree(target_phys_addr_t addr,
+static int bamboo_load_device_tree(target_phys_addr_t addr,
                                      uint32_t ramsize,
                                      target_phys_addr_t initrd_base,
                                      target_phys_addr_t initrd_size,
@@ -42,11 +42,13 @@ static void *bamboo_load_device_tree(target_phys_addr_t addr,
 
     filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, BINARY_DEVICE_TREE_FILE);
     if (!filename) {
+        ret = -1;
         goto out;
     }
     fdt = load_device_tree(filename, &fdt_size);
     qemu_free(filename);
     if (fdt == NULL) {
+        ret = -1;
         goto out;
     }
 
@@ -75,12 +77,13 @@ static void *bamboo_load_device_tree(target_phys_addr_t addr,
     if (kvm_enabled())
         kvmppc_fdt_update(fdt);
 
-    cpu_physical_memory_write (addr, (void *)fdt, fdt_size);
+    ret = rom_add_blob_fixed(BINARY_DEVICE_TREE_FILE, fdt, fdt_size, addr);
+    qemu_free(fdt);
 
 out:
 #endif
 
-    return fdt;
+    return ret;
 }
 
 static void bamboo_init(ram_addr_t ram_size,
@@ -101,7 +104,6 @@ static void bamboo_init(ram_addr_t ram_size,
     target_ulong initrd_base = 0;
     target_long initrd_size = 0;
     target_ulong dt_base = 0;
-    void *fdt;
     int i;
 
     /* Setup CPU. */
@@ -153,9 +155,8 @@ static void bamboo_init(ram_addr_t ram_size,
         else
             dt_base = kernel_size + loadaddr;
 
-        fdt = bamboo_load_device_tree(dt_base, ram_size,
-                                      initrd_base, initrd_size, kernel_cmdline);
-        if (fdt == NULL) {
+        if (bamboo_load_device_tree(dt_base, ram_size,
+                        initrd_base, initrd_size, kernel_cmdline) < 0) {
             fprintf(stderr, "couldn't load device tree\n");
             exit(1);
         }

hw/ppce500_mpc8544ds.c

@@ -72,7 +72,7 @@ out:
 }
 #endif
 
-static void *mpc8544_load_device_tree(target_phys_addr_t addr,
+static int mpc8544_load_device_tree(target_phys_addr_t addr,
                                      uint32_t ramsize,
                                      target_phys_addr_t initrd_base,
                                      target_phys_addr_t initrd_size,
@@ -87,11 +87,13 @@ static void *mpc8544_load_device_tree(target_phys_addr_t addr,
 
     filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, BINARY_DEVICE_TREE_FILE);
     if (!filename) {
+        ret = -1;
         goto out;
     }
     fdt = load_device_tree(filename, &fdt_size);
     qemu_free(filename);
     if (fdt == NULL) {
+        ret = -1;
         goto out;
     }
 
@@ -123,6 +125,7 @@ static void *mpc8544_load_device_tree(target_phys_addr_t addr,
 
         if ((dp = opendir("/proc/device-tree/cpus/")) == NULL) {
             printf("Can't open directory /proc/device-tree/cpus/\n");
+            ret = -1;
             goto out;
         }
 
@@ -136,6 +139,7 @@ static void *mpc8544_load_device_tree(target_phys_addr_t addr,
         closedir(dp);
         if (buf[0] == '\0') {
             printf("Unknow host!\n");
+            ret = -1;
             goto out;
         }
 
@@ -143,12 +147,13 @@ static void *mpc8544_load_device_tree(target_phys_addr_t addr,
         mpc8544_copy_soc_cell(fdt, buf, "timebase-frequency");
     }
 
-    cpu_physical_memory_write (addr, (void *)fdt, fdt_size);
+    ret = rom_add_blob_fixed(BINARY_DEVICE_TREE_FILE, fdt, fdt_size, addr);
+    qemu_free(fdt);
 
 out:
 #endif
 
-    return fdt;
+    return ret;
 }
 
 static void mpc8544ds_init(ram_addr_t ram_size,
@@ -168,7 +173,6 @@ static void mpc8544ds_init(ram_addr_t ram_size,
     target_ulong dt_base=DTB_LOAD_BASE;
     target_ulong initrd_base=INITRD_LOAD_BASE;
     target_long initrd_size=0;
-    void *fdt;
     int i=0;
     unsigned int pci_irq_nrs[4] = {1, 2, 3, 4};
     qemu_irq *irqs, *mpic, *pci_irqs;
@@ -254,9 +258,8 @@ 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) {
-        fdt = mpc8544_load_device_tree(dt_base, ram_size,
-                                      initrd_base, initrd_size, kernel_cmdline);
-        if (fdt == NULL) {
+        if (mpc8544_load_device_tree(dt_base, ram_size,
+                    initrd_base, initrd_size, kernel_cmdline) < 0) {
             fprintf(stderr, "couldn't load device tree\n");
             exit(1);
         }