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authorSascha Hauer <s.hauer@pengutronix.de>2014-01-09 13:13:38 +0100
committerSascha Hauer <s.hauer@pengutronix.de>2014-01-14 12:36:06 +0100
commita1aca01d6263a534f152fe3354a1666e110b3a84 (patch)
tree2ee4483781b1bc2154485ccace8adf21b1b57a99 /common/bootm.c
parent76ccd96f4a92c028ea531a098b58356208b0815b (diff)
downloadbarebox-a1aca01d6263a534f152fe3354a1666e110b3a84.tar.gz
bootm: introduce bootm_load_devicetree helper
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Diffstat (limited to 'common/bootm.c')
-rw-r--r--common/bootm.c63
1 files changed, 63 insertions, 0 deletions
diff --git a/common/bootm.c b/common/bootm.c
index 9ccbe8f..d62d011 100644
--- a/common/bootm.c
+++ b/common/bootm.c
@@ -123,6 +123,67 @@ int bootm_load_initrd(struct image_data *data, unsigned long load_address)
return 0;
}
+/*
+ * bootm_load_devicetree() - load devicetree
+ *
+ * @data: image data context
+ * @load_address: The address where the devicetree should be loaded to
+ *
+ * This loads the devicetree to a RAM location. load_address must be a valid
+ * address. The resulting devicetree will be found at data->oftree.
+ *
+ * Return: 0 on success, negative error code otherwise
+ */
+int bootm_load_devicetree(struct image_data *data, unsigned long load_address)
+{
+ int fdt_size;
+ struct fdt_header *oftree;
+
+ if (data->oftree)
+ return 0;
+
+ if (!IS_ENABLED(CONFIG_OFTREE))
+ return 0;
+
+ if (!data->of_root_node)
+ return 0;
+
+ if (data->initrd_res) {
+ of_add_initrd(data->of_root_node, data->initrd_res->start,
+ data->initrd_res->end);
+ of_add_reserve_entry(data->initrd_res->start, data->initrd_res->end);
+ }
+
+ oftree = of_get_fixed_tree(data->of_root_node);
+ if (!oftree)
+ return -EINVAL;
+
+ fdt_size = be32_to_cpu(oftree->totalsize);
+
+ data->oftree_res = request_sdram_region("oftree", load_address,
+ fdt_size);
+ if (!data->oftree_res) {
+ free(oftree);
+ return -ENOMEM;
+ }
+
+ memcpy((void *)data->oftree_res->start, oftree, fdt_size);
+
+ free(oftree);
+
+ oftree = (void *)data->oftree_res->start;
+
+ fdt_add_reserve_map(oftree);
+
+ of_print_cmdline(data->of_root_node);
+ if (bootm_verbose(data) > 1)
+ of_print_nodes(data->of_root_node, 0);
+
+ data->oftree = oftree;
+
+ return 0;
+}
+
static int bootm_open_os_uimage(struct image_data *data)
{
int ret;
@@ -412,6 +473,8 @@ err_out:
release_sdram_region(data->os_res);
if (data->initrd_res)
release_sdram_region(data->initrd_res);
+ if (data->oftree_res)
+ release_sdram_region(data->oftree_res);
if (data->initrd && data->initrd != data->os)
uimage_close(data->initrd);
if (data->os)