abuf: Provide a constant buffer

Add a new initialiser which can accept a constant pointer.

Signed-off-by: Simon Glass <sjg@chromium.org>

1 files changed, 22 insertions, 0 deletions

diff --git a/test/lib/abuf.c b/test/lib/abuf.c
index 5d61f9261c6..b38690fe1a9 100644
--- a/test/lib/abuf.c
+++ b/test/lib/abuf.c
@@ -46,6 +46,28 @@ static int lib_test_abuf_set(struct unit_test_state *uts)
 }
 LIB_TEST(lib_test_abuf_set, 0);
 
+/* Test abuf_init_const() */
+static int lib_test_abuf_init_const(struct unit_test_state *uts)
+{
+	struct abuf buf;
+	ulong start;
+	void *ptr;
+
+	start = ut_check_free();
+
+	ptr = map_sysmem(0x100, 0);
+
+	abuf_init_const(&buf, ptr, 10);
+	ut_asserteq_ptr(ptr, buf.data);
+	ut_asserteq(10, buf.size);
+
+	/* No memory should have been allocated */
+	ut_assertok(ut_check_delta(start));
+
+	return 0;
+}
+LIB_TEST(lib_test_abuf_init_const, 0);
+
 /* Test abuf_map_sysmem() and abuf_addr() */
 static int lib_test_abuf_map_sysmem(struct unit_test_state *uts)
 {