1 /*
2 * libfdt - Flat Device Tree manipulation
3 * Testcase for DT overlays()
4 * Copyright (C) 2016 Free Electrons
5 * Copyright (C) 2016 NextThing Co.
6 *
7 * This library is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public License
9 * as published by the Free Software Foundation; either version 2.1 of
10 * the License, or (at your option) any later version.
11 *
12 * This library is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with this library; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
20 */
21
22 #include <stdio.h>
23
24 #include <libfdt.h>
25
26 #include "tests.h"
27
28 #define CHECK(code, expected) \
29 { \
30 err = (code); \
31 if (err != expected) \
32 FAIL(#code ": %s", fdt_strerror(err)); \
33 }
34
35 /* 4k ought to be enough for anybody */
36 #define FDT_COPY_SIZE (4 * 1024)
37
open_dt(char * path)38 static void *open_dt(char *path)
39 {
40 void *dt, *copy;
41 int err;
42
43 dt = load_blob(path);
44 copy = xmalloc(FDT_COPY_SIZE);
45
46 /*
47 * Resize our DTs to 4k so that we have room to operate on
48 */
49 CHECK(fdt_open_into(dt, copy, FDT_COPY_SIZE), 0);
50
51 return copy;
52 }
53
main(int argc,char * argv[])54 int main(int argc, char *argv[])
55 {
56 void *fdt_base, *fdt_overlay;
57 int err;
58
59 test_init(argc, argv);
60 if (argc != 3)
61 CONFIG("Usage: %s <base dtb> <overlay dtb>", argv[0]);
62
63 fdt_base = open_dt(argv[1]);
64 fdt_overlay = open_dt(argv[2]);
65
66 /* Apply the overlay */
67 CHECK(fdt_overlay_apply(fdt_base, fdt_overlay), -FDT_ERR_BADOVERLAY);
68
69 PASS();
70 }
71