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 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 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
