aboutsummaryrefslogtreecommitdiff
path: root/tests/overlay.c
blob: 3093eec67a915859bf7842cb8e82e97d226657fe (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
/*
 * libfdt - Flat Device Tree manipulation
 *	Testcase for DT overlays()
 * Copyright (C) 2016 Free Electrons
 * Copyright (C) 2016 NextThing Co.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public License
 * as published by the Free Software Foundation; either version 2.1 of
 * the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
 */

#include <stdio.h>

#include <libfdt.h>

#include "tests.h"

#define CHECK(code) \
	{ \
		int err = (code); \
		if (err) \
			FAIL(#code ": %s", fdt_strerror(err)); \
	}

/* 4k ought to be enough for anybody */
#define FDT_COPY_SIZE	(4 * 1024)

static int fdt_getprop_u32_by_poffset(void *fdt, const char *path,
				      const char *name, int poffset,
				      unsigned long *out)
{
	const fdt32_t *val;
	int node_off;
	int len;

	node_off = fdt_path_offset(fdt, path);
	if (node_off < 0)
		return node_off;

	val = fdt_getprop(fdt, node_off, name, &len);
	if (!val || (len < (sizeof(uint32_t) * (poffset + 1))))
		return -FDT_ERR_NOTFOUND;

	*out = fdt32_to_cpu(*(val + poffset));

	return 0;
}

static int check_getprop_string_by_name(void *fdt, const char *path,
					const char *name, const char *val)
{
	int node_off;

	node_off = fdt_path_offset(fdt, path);
	if (node_off < 0)
		return node_off;

	check_getprop_string(fdt, node_off, name, val);

	return 0;
}

static int check_getprop_u32_by_name(void *fdt, const char *path,
				     const char *name, uint32_t val)
{
	int node_off;

	node_off = fdt_path_offset(fdt, path);
	CHECK(node_off < 0);

	check_getprop_cell(fdt, node_off, name, val);

	return 0;
}

static int check_getprop_null_by_name(void *fdt, const char *path,
				      const char *name)
{
	int node_off;

	node_off = fdt_path_offset(fdt, path);
	CHECK(node_off < 0);

	check_property(fdt, node_off, name, 0, NULL);

	return 0;
}

static int fdt_overlay_change_int_property(void *fdt)
{
	return check_getprop_u32_by_name(fdt, "/test-node", "test-int-property",
					 43);
}

static int fdt_overlay_change_str_property(void *fdt)
{
	return check_getprop_string_by_name(fdt, "/test-node",
					    "test-str-property", "foobar");
}

static int fdt_overlay_add_str_property(void *fdt)
{
	return check_getprop_string_by_name(fdt, "/test-node",
					    "test-str-property-2", "foobar2");
}

static int fdt_overlay_add_node(void *fdt)
{
	return check_getprop_null_by_name(fdt, "/test-node/new-node",
					  "new-property");
}

static int fdt_overlay_add_subnode_property(void *fdt)
{
	check_getprop_null_by_name(fdt, "/test-node/sub-test-node",
				   "sub-test-property");
	check_getprop_null_by_name(fdt, "/test-node/sub-test-node",
				   "new-sub-test-property");

	return 0;
}

static int fdt_overlay_local_phandle(void *fdt)
{
	uint32_t local_phandle;
	unsigned long val = 0;
	int off;

	off = fdt_path_offset(fdt, "/test-node/new-local-node");
	CHECK(off < 0);

	local_phandle = fdt_get_phandle(fdt, off);
	CHECK(!local_phandle);

	CHECK(fdt_getprop_u32_by_poffset(fdt, "/test-node",
					 "test-several-phandle",
					 0, &val));
	CHECK(val != local_phandle);

	CHECK(fdt_getprop_u32_by_poffset(fdt, "/test-node",
					 "test-several-phandle",
					 1, &val));
	CHECK(val != local_phandle);

	return 0;
}

static int fdt_overlay_local_phandles(void *fdt)
{
	uint32_t local_phandle, test_phandle;
	unsigned long val = 0;
	int off;

	off = fdt_path_offset(fdt, "/test-node/new-local-node");
	CHECK(off < 0);

	local_phandle = fdt_get_phandle(fdt, off);
	CHECK(!local_phandle);

	off = fdt_path_offset(fdt, "/test-node");
	CHECK(off < 0);

	test_phandle = fdt_get_phandle(fdt, off);
	CHECK(!test_phandle);

	CHECK(fdt_getprop_u32_by_poffset(fdt, "/test-node",
					 "test-phandle", 0, &val));
	CHECK(test_phandle != val);

	CHECK(fdt_getprop_u32_by_poffset(fdt, "/test-node",
					 "test-phandle", 1, &val));
	CHECK(local_phandle != val);

	return 0;
}

static void *open_dt(char *path)
{
	void *dt, *copy;

	dt = load_blob(path);
	copy = xmalloc(FDT_COPY_SIZE);

	/*
	 * Resize our DTs to 4k so that we have room to operate on
	 */
	CHECK(fdt_open_into(dt, copy, FDT_COPY_SIZE));

	return copy;
}

int main(int argc, char *argv[])
{
	void *fdt_base, *fdt_overlay;

	test_init(argc, argv);
	if (argc != 3)
		CONFIG("Usage: %s <base dtb> <overlay dtb>", argv[0]);

	fdt_base = open_dt(argv[1]);
	fdt_overlay = open_dt(argv[2]);

	/* Apply the overlay */
	CHECK(fdt_overlay_apply(fdt_base, fdt_overlay));

	fdt_overlay_change_int_property(fdt_base);
	fdt_overlay_change_str_property(fdt_base);
	fdt_overlay_add_str_property(fdt_base);
	fdt_overlay_add_node(fdt_base);
	fdt_overlay_add_subnode_property(fdt_base);

	/*
	 * If the base tree has a __symbols__ node, do the tests that
	 * are only successful with a proper phandle support, and thus
	 * dtc -@
	 */
	if (fdt_path_offset(fdt_base, "/__symbols__") >= 0) {
		fdt_overlay_local_phandle(fdt_base);
		fdt_overlay_local_phandles(fdt_base);
	}

	PASS();
}