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-rw-r--r--test/dm/ofnode.c45
1 files changed, 45 insertions, 0 deletions
diff --git a/test/dm/ofnode.c b/test/dm/ofnode.c
index 473a8cef578..6fbebc7da08 100644
--- a/test/dm/ofnode.c
+++ b/test/dm/ofnode.c
@@ -1240,3 +1240,48 @@ static int dm_test_ofnode_copy_props_ot(struct unit_test_state *uts)
return 0;
}
DM_TEST(dm_test_ofnode_copy_props_ot, UT_TESTF_SCAN_FDT | UT_TESTF_OTHER_FDT);
+
+/* check that the livetree is aligned to a structure boundary */
+static int dm_test_livetree_align(struct unit_test_state *uts)
+{
+ const int align = __alignof__(struct unit_test_state);
+ struct device_node *node;
+ u32 *sentinel;
+ ulong start;
+
+ start = (ulong)gd_of_root();
+ ut_asserteq(start, ALIGN(start, align));
+
+ node = gd_of_root();
+ sentinel = (void *)node - sizeof(u32);
+
+ /*
+ * The sentinel should be overwritten with the root node. If it isn't,
+ * then the root node is not at the very start of the livetree memory
+ * area, and free(root) will fail to free the memory used by the
+ * livetree.
+ */
+ ut_assert(*sentinel != BAD_OF_ROOT);
+
+ return 0;
+}
+DM_TEST(dm_test_livetree_align, UT_TESTF_LIVE_TREE);
+
+/* check that it is possible to load an arbitrary livetree */
+static int dm_test_livetree_ensure(struct unit_test_state *uts)
+{
+ oftree tree;
+ ofnode node;
+
+ /* read from other.dtb */
+ ut_assertok(test_load_other_fdt(uts));
+ tree = oftree_from_fdt(uts->other_fdt);
+ ut_assert(oftree_valid(tree));
+ node = oftree_path(tree, "/node/subnode");
+ ut_assert(ofnode_valid(node));
+ ut_asserteq_str("sandbox-other2",
+ ofnode_read_string(node, "compatible"));
+
+ return 0;
+}
+DM_TEST(dm_test_livetree_ensure, 0);