blob: 0c30ad3c5fee6a47974e0d875ee5c4d722f2b905 [file] [log] [blame]
David Gibson3c44c872007-10-24 11:06:09 +10001/*
2 * libfdt - Flat Device Tree manipulation
3 * Tests if two given dtbs are structurally equal (including order)
4 * Copyright (C) 2007 David Gibson, IBM Corporation.
5 *
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public License
8 * as published by the Free Software Foundation; either version 2.1 of
9 * the License, or (at your option) any later version.
10 *
11 * This library is distributed in the hope that it will be useful, but
12 * WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
15 *
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
19 */
20
21#include <stdlib.h>
22#include <stdio.h>
23#include <string.h>
24#include <stdint.h>
25
26#include <fdt.h>
27#include <libfdt.h>
28
29#include "tests.h"
30#include "testdata.h"
31
32void compare_mem_rsv(const void *fdt1, const void *fdt2)
33{
34 int i;
35 uint64_t addr1, size1, addr2, size2;
36 int err;
37
38 if (fdt_num_mem_rsv(fdt1) != fdt_num_mem_rsv(fdt2))
39 FAIL("Trees have different number of reserve entries");
40 for (i = 0; i < fdt_num_mem_rsv(fdt1); i++) {
41 err = fdt_get_mem_rsv(fdt1, i, &addr1, &size1);
42 if (err)
43 FAIL("fdt_get_mem_rsv(fdt1, %d, ...): %s", i,
44 fdt_strerror(err));
45 err = fdt_get_mem_rsv(fdt2, i, &addr2, &size2);
46 if (err)
47 FAIL("fdt_get_mem_rsv(fdt2, %d, ...): %s", i,
48 fdt_strerror(err));
49 if ((addr1 != addr2) || (size1 != size2))
50 FAIL("Mismatch in reserve entry %d: "
51 "(0x%llx, 0x%llx) != (0x%llx, 0x%llx)", i,
52 addr1, size1, addr2, size2);
53 }
54}
55
56void compare_structure(const void *fdt1, const void *fdt2)
57{
58 int nextoffset1 = 0, nextoffset2 = 0;
59 int offset1, offset2;
60 uint32_t tag1, tag2;
61 const char *name1, *name2;
62 int err;
63 const struct fdt_property *prop1, *prop2;
64 int len1, len2;
65
66 while (1) {
67 do {
68 offset1 = nextoffset1;
69 tag1 = fdt_next_tag(fdt1, offset1, &nextoffset1);
70 } while (tag1 == FDT_NOP);
71 do {
72 offset2 = nextoffset2;
73 tag2 = fdt_next_tag(fdt2, offset2, &nextoffset2);
74 } while (tag2 == FDT_NOP);
75
76 if (tag1 != tag2)
77 FAIL("Tag mismatch (%d != %d) at (%d, %d)",
78 tag1, tag2, offset1, offset2);
79
80 switch (tag1) {
81 case FDT_BEGIN_NODE:
82 name1 = fdt_get_name(fdt1, offset1, &err);
83 if (!name1)
84 FAIL("fdt_get_name(fdt1, %d, ..): %s",
85 offset1, fdt_strerror(err));
86 name2 = fdt_get_name(fdt2, offset2, NULL);
87 if (!name2)
88 FAIL("fdt_get_name(fdt2, %d, ..): %s",
89 offset2, fdt_strerror(err));
90 if (!streq(name1, name2))
91 FAIL("Name mismatch (\"%s\" != \"%s\") at (%d, %d)",
92 name1, name2, offset1, offset2);
93 break;
94
95 case FDT_PROP:
David Gibson2cf86932007-11-19 17:26:22 +110096 prop1 = fdt_offset_ptr(fdt1, offset1, sizeof(*prop1));
David Gibson3c44c872007-10-24 11:06:09 +100097 if (!prop1)
98 FAIL("Could get fdt1 property at %d", offset1);
David Gibson2cf86932007-11-19 17:26:22 +110099 prop2 = fdt_offset_ptr(fdt2, offset2, sizeof(*prop2));
David Gibson3c44c872007-10-24 11:06:09 +1000100 if (!prop2)
101 FAIL("Could get fdt2 property at %d", offset2);
102
103 name1 = fdt_string(fdt1, fdt32_to_cpu(prop1->nameoff));
104 name2 = fdt_string(fdt2, fdt32_to_cpu(prop2->nameoff));
105 if (!streq(name1, name2))
106 FAIL("Property name mismatch \"%s\" != \"%s\" "
107 "at (%d, %d)", name1, name2, offset1, offset2);
108 len1 = fdt32_to_cpu(prop1->len);
109 len2 = fdt32_to_cpu(prop2->len);
110 if (len1 != len2)
111 FAIL("Property length mismatch %u != %u "
112 "at (%d, %d)", len1, len2, offset1, offset2);
113
114 if (memcmp(prop1->data, prop2->data, len1) != 0)
115 FAIL("Property value mismatch at (%d, %d)",
116 offset1, offset2);
117 break;
118
119 case FDT_END:
120 return;
121 }
122 }
123}
124
125int main(int argc, char *argv[])
126{
127 void *fdt1, *fdt2;
128
129 test_init(argc, argv);
130 if (argc != 3)
131 CONFIG("Usage: %s <dtb file> <dtb file>", argv[0]);
132 fdt1 = load_blob(argv[1]);
133 fdt2 = load_blob(argv[2]);
134
135 compare_mem_rsv(fdt1, fdt2);
136 compare_structure(fdt1, fdt2);
137
138 PASS();
139}