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-rw-r--r--lib/libfdt/fdt_sw.c32
1 files changed, 32 insertions, 0 deletions
diff --git a/lib/libfdt/fdt_sw.c b/lib/libfdt/fdt_sw.c
index 580b57024ff..320a914991a 100644
--- a/lib/libfdt/fdt_sw.c
+++ b/lib/libfdt/fdt_sw.c
@@ -62,6 +62,38 @@ int fdt_create(void *buf, int bufsize)
return 0;
}
+int fdt_resize(void *fdt, void *buf, int bufsize)
+{
+ size_t headsize, tailsize;
+ char *oldtail, *newtail;
+
+ FDT_SW_CHECK_HEADER(fdt);
+
+ headsize = fdt_off_dt_struct(fdt);
+ tailsize = fdt_size_dt_strings(fdt);
+
+ if ((headsize + tailsize) > bufsize)
+ return -FDT_ERR_NOSPACE;
+
+ oldtail = (char *)fdt + fdt_totalsize(fdt) - tailsize;
+ newtail = (char *)buf + bufsize - tailsize;
+
+ /* Two cases to avoid clobbering data if the old and new
+ * buffers partially overlap */
+ if (buf <= fdt) {
+ memmove(buf, fdt, headsize);
+ memmove(newtail, oldtail, tailsize);
+ } else {
+ memmove(newtail, oldtail, tailsize);
+ memmove(buf, fdt, headsize);
+ }
+
+ fdt_set_off_dt_strings(buf, bufsize);
+ fdt_set_totalsize(buf, bufsize);
+
+ return 0;
+}
+
int fdt_add_reservemap_entry(void *fdt, uint64_t addr, uint64_t size)
{
struct fdt_reserve_entry *re;