1 /* $NetBSD: dtbs_equal_ordered.c,v 1.1.1.3 2019/12/22 12:34:06 skrll Exp $ */
2
3 // SPDX-License-Identifier: LGPL-2.1-or-later
4 /*
5 * libfdt - Flat Device Tree manipulation
6 * Tests if two given dtbs are structurally equal (including order)
7 * Copyright (C) 2007 David Gibson, IBM Corporation.
8 */
9
10 #include <stdlib.h>
11 #include <stdio.h>
12 #include <string.h>
13 #include <stdint.h>
14
15 #include <libfdt.h>
16
17 #include "tests.h"
18 #include "testdata.h"
19
20 static int notequal; /* = 0 */
21
22 #define MISMATCH(fmt, ...) \
23 do { \
24 if (notequal) \
25 PASS(); \
26 else \
27 FAIL(fmt, ##__VA_ARGS__); \
28 } while (0)
29
30 #define MATCH() \
31 do { \
32 if (!notequal) \
33 PASS(); \
34 else \
35 FAIL("Trees match which shouldn't"); \
36 } while (0)
37
38 #define CHECK(code) \
39 { \
40 err = (code); \
41 if (err) \
42 FAIL(#code ": %s", fdt_strerror(err)); \
43 }
44
compare_mem_rsv(const void * fdt1,const void * fdt2)45 static void compare_mem_rsv(const void *fdt1, const void *fdt2)
46 {
47 int i;
48 uint64_t addr1, size1, addr2, size2;
49 int err;
50
51 if (fdt_num_mem_rsv(fdt1) != fdt_num_mem_rsv(fdt2))
52 MISMATCH("Trees have different number of reserve entries");
53 for (i = 0; i < fdt_num_mem_rsv(fdt1); i++) {
54 CHECK(fdt_get_mem_rsv(fdt1, i, &addr1, &size1));
55 CHECK(fdt_get_mem_rsv(fdt2, i, &addr2, &size2));
56
57 if ((addr1 != addr2) || (size1 != size2))
58 MISMATCH("Mismatch in reserve entry %d: "
59 "(0x%llx, 0x%llx) != (0x%llx, 0x%llx)", i,
60 (unsigned long long)addr1,
61 (unsigned long long)size1,
62 (unsigned long long)addr2,
63 (unsigned long long)size2);
64 }
65 }
66
compare_structure(const void * fdt1,const void * fdt2)67 static void compare_structure(const void *fdt1, const void *fdt2)
68 {
69 int nextoffset1 = 0, nextoffset2 = 0;
70 int offset1, offset2;
71 uint32_t tag1, tag2;
72 const char *name1, *name2;
73 int err;
74 const struct fdt_property *prop1, *prop2;
75 int len1, len2;
76
77 while (1) {
78 do {
79 offset1 = nextoffset1;
80 tag1 = fdt_next_tag(fdt1, offset1, &nextoffset1);
81 } while (tag1 == FDT_NOP);
82 do {
83 offset2 = nextoffset2;
84 tag2 = fdt_next_tag(fdt2, offset2, &nextoffset2);
85 } while (tag2 == FDT_NOP);
86
87 if (tag1 != tag2)
88 MISMATCH("Tag mismatch (%d != %d) at (%d, %d)",
89 tag1, tag2, offset1, offset2);
90
91 switch (tag1) {
92 case FDT_BEGIN_NODE:
93 name1 = fdt_get_name(fdt1, offset1, &err);
94 if (!name1)
95 FAIL("fdt_get_name(fdt1, %d, ..): %s",
96 offset1, fdt_strerror(err));
97 name2 = fdt_get_name(fdt2, offset2, NULL);
98 if (!name2)
99 FAIL("fdt_get_name(fdt2, %d, ..): %s",
100 offset2, fdt_strerror(err));
101
102 if (!streq(name1, name2))
103 MISMATCH("Name mismatch (\"%s\" != \"%s\") at (%d, %d)",
104 name1, name2, offset1, offset2);
105 break;
106
107 case FDT_PROP:
108 prop1 = fdt_offset_ptr(fdt1, offset1, sizeof(*prop1));
109 if (!prop1)
110 FAIL("Could get fdt1 property at %d", offset1);
111 prop2 = fdt_offset_ptr(fdt2, offset2, sizeof(*prop2));
112 if (!prop2)
113 FAIL("Could get fdt2 property at %d", offset2);
114
115 name1 = fdt_string(fdt1, fdt32_to_cpu(prop1->nameoff));
116 name2 = fdt_string(fdt2, fdt32_to_cpu(prop2->nameoff));
117 if (!streq(name1, name2))
118 MISMATCH("Property name mismatch \"%s\" != \"%s\" "
119 "at (%d, %d)", name1, name2, offset1, offset2);
120 len1 = fdt32_to_cpu(prop1->len);
121 len2 = fdt32_to_cpu(prop2->len);
122 if (len1 != len2)
123 MISMATCH("Property length mismatch %u != %u "
124 "at (%d, %d)", len1, len2, offset1, offset2);
125
126 if (memcmp(prop1->data, prop2->data, len1) != 0)
127 MISMATCH("Property value mismatch at (%d, %d)",
128 offset1, offset2);
129 break;
130
131 case FDT_END:
132 return;
133 }
134 }
135 }
136
main(int argc,char * argv[])137 int main(int argc, char *argv[])
138 {
139 void *fdt1, *fdt2;
140 uint32_t cpuid1, cpuid2;
141
142 test_init(argc, argv);
143 if ((argc != 3)
144 && ((argc != 4) || !streq(argv[1], "-n")))
145 CONFIG("Usage: %s [-n] <dtb file> <dtb file>", argv[0]);
146 if (argc == 4)
147 notequal = 1;
148
149 fdt1 = load_blob(argv[argc-2]);
150 fdt2 = load_blob(argv[argc-1]);
151
152 compare_mem_rsv(fdt1, fdt2);
153 compare_structure(fdt1, fdt2);
154
155 cpuid1 = fdt_boot_cpuid_phys(fdt1);
156 cpuid2 = fdt_boot_cpuid_phys(fdt2);
157 if (cpuid1 != cpuid2)
158 MISMATCH("boot_cpuid_phys mismatch 0x%x != 0x%x",
159 cpuid1, cpuid2);
160
161 MATCH();
162 }
163