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-rw-r--r--device_tree.c37
-rw-r--r--device_tree.h1
2 files changed, 38 insertions, 0 deletions
diff --git a/device_tree.c b/device_tree.c
index 2f127b71b0..d0378961f0 100644
--- a/device_tree.c
+++ b/device_tree.c
@@ -25,6 +25,43 @@
#include <libfdt.h>
+#define FDT_MAX_SIZE 0x10000
+
+void *create_device_tree(int *sizep)
+{
+ void *fdt;
+ int ret;
+
+ *sizep = FDT_MAX_SIZE;
+ fdt = g_malloc0(FDT_MAX_SIZE);
+ ret = fdt_create(fdt, FDT_MAX_SIZE);
+ if (ret < 0) {
+ goto fail;
+ }
+ ret = fdt_begin_node(fdt, "");
+ if (ret < 0) {
+ goto fail;
+ }
+ ret = fdt_end_node(fdt);
+ if (ret < 0) {
+ goto fail;
+ }
+ ret = fdt_finish(fdt);
+ if (ret < 0) {
+ goto fail;
+ }
+ ret = fdt_open_into(fdt, fdt, *sizep);
+ if (ret) {
+ fprintf(stderr, "Unable to copy device tree in memory\n");
+ exit(1);
+ }
+
+ return fdt;
+fail:
+ fprintf(stderr, "%s Couldn't create dt: %s\n", __func__, fdt_strerror(ret));
+ exit(1);
+}
+
void *load_device_tree(const char *filename_path, int *sizep)
{
int dt_size;
diff --git a/device_tree.h b/device_tree.h
index 36fc9dbede..5f76f40eeb 100644
--- a/device_tree.h
+++ b/device_tree.h
@@ -14,6 +14,7 @@
#ifndef __DEVICE_TREE_H__
#define __DEVICE_TREE_H__
+void *create_device_tree(int *sizep);
void *load_device_tree(const char *filename_path, int *sizep);
int qemu_devtree_setprop(void *fdt, const char *node_path,