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authorSimon Glass <sjg@chromium.org>2012-10-25 16:31:00 +0000
committerGerald Van Baren <gvb@unssw.com>2012-11-12 23:00:34 -0500
commitf20c461984c3d986fde037d4c5bf600aa0497676 (patch)
treebd00ee8c90b160fa69bcddceaa5641c867f03a03 /lib/fdtdec.c
parent332ab0d54aaa5b8b27096996d10c8c6183c6972c (diff)
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fdt: Add fdtdec_decode_region() to decode memory region
A memory region has a start and a size and is often specified in a node by a 'reg' property. Add a function to decode this information from the fdt. Signed-off-by: Simon Glass <sjg@chromium.org>
Diffstat (limited to 'lib/fdtdec.c')
-rw-r--r--lib/fdtdec.c17
1 files changed, 17 insertions, 0 deletions
diff --git a/lib/fdtdec.c b/lib/fdtdec.c
index 2d60c8a..5570972 100644
--- a/lib/fdtdec.c
+++ b/lib/fdtdec.c
@@ -542,3 +542,20 @@ char *fdtdec_get_config_string(const void *blob, const char *prop_name)
return (char *)nodep;
}
+
+int fdtdec_decode_region(const void *blob, int node,
+ const char *prop_name, void **ptrp, size_t *size)
+{
+ const fdt_addr_t *cell;
+ int len;
+
+ debug("%s: %s\n", __func__, prop_name);
+ cell = fdt_getprop(blob, node, prop_name, &len);
+ if (!cell || (len != sizeof(fdt_addr_t) * 2))
+ return -1;
+
+ *ptrp = (void *)fdt_addr_to_cpu(*cell);
+ *size = fdt_size_to_cpu(cell[1]);
+ debug("%s: size=%zx\n", __func__, *size);
+ return 0;
+}