arm/boot: Use qemu_devtree_setprop_sized_cells()

Replace the opencoded assembly of the reg property array for the
/memory node with a call to qemu_devtree_setprop_sized_cells().
Signed-off-by: NPeter Maydell <peter.maydell@linaro.org>
Reviewed-by: NPeter Crosthwaite <peter.crosthwaite@xilinx.com>
Message-id: 1373977512-28932-3-git-send-email-peter.maydell@linaro.org

hw/arm/boot.c

@@ -227,12 +227,10 @@ static void set_kernel_args_old(const struct arm_boot_info *info)
 
 static int load_dtb(hwaddr addr, const struct arm_boot_info *binfo)
 {
-    uint32_t *mem_reg_property;
-    uint32_t mem_reg_propsize;
     void *fdt = NULL;
     char *filename;
     int size, rc;
-    uint32_t acells, scells, hival;
+    uint32_t acells, scells;
 
     filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, binfo->dtb_filename);
     if (!filename) {
@@ -255,29 +253,18 @@ static int load_dtb(hwaddr addr, const struct arm_boot_info *binfo)
         goto fail;
     }
 
-    mem_reg_propsize = acells + scells;
-    mem_reg_property = g_new0(uint32_t, mem_reg_propsize);
-    mem_reg_property[acells - 1] = cpu_to_be32(binfo->loader_start);
-    hival = cpu_to_be32(binfo->loader_start >> 32);
-    if (acells > 1) {
-        mem_reg_property[acells - 2] = hival;
-    } else if (hival != 0) {
-        fprintf(stderr, "qemu: dtb file not compatible with "
-                "RAM start address > 4GB\n");
-        goto fail;
-    }
-    mem_reg_property[acells + scells - 1] = cpu_to_be32(binfo->ram_size);
-    hival = cpu_to_be32(binfo->ram_size >> 32);
-    if (scells > 1) {
-        mem_reg_property[acells + scells - 2] = hival;
-    } else if (hival != 0) {
+    if (scells < 2 && binfo->ram_size >= (1ULL << 32)) {
+        /* This is user error so deserves a friendlier error message
+         * than the failure of setprop_sized_cells would provide
+         */
         fprintf(stderr, "qemu: dtb file not compatible with "
                 "RAM size > 4GB\n");
         goto fail;
     }
 
-    rc = qemu_devtree_setprop(fdt, "/memory", "reg", mem_reg_property,
-                              mem_reg_propsize * sizeof(uint32_t));
+    rc = qemu_devtree_setprop_sized_cells(fdt, "/memory", "reg",
+                                          acells, binfo->loader_start,
+                                          scells, binfo->ram_size);
     if (rc < 0) {
         fprintf(stderr, "couldn't set /memory/reg\n");
         goto fail;