1/*	$NetBSD: subnode_offset.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 *	Testcase for fdt_subnode_offset()
7 * Copyright (C) 2006 David Gibson, IBM Corporation.
8 */
9#include <stdlib.h>
10#include <stdio.h>
11#include <string.h>
12#include <stdint.h>
13
14#include <libfdt.h>
15
16#include "tests.h"
17#include "testdata.h"
18
19static int check_subnode(struct fdt_header *fdt, int parent, const char *name)
20{
21	int offset;
22	const struct fdt_node_header *nh;
23	uint32_t tag;
24
25	verbose_printf("Checking subnode \"%s\" of %d...", name, parent);
26	offset = fdt_subnode_offset(fdt, parent, name);
27	verbose_printf("offset %d...", offset);
28	if (offset < 0)
29		FAIL("fdt_subnode_offset(\"%s\"): %s", name, fdt_strerror(offset));
30	nh = fdt_offset_ptr(fdt, offset, sizeof(*nh));
31	verbose_printf("pointer %p\n", nh);
32	if (! nh)
33		FAIL("NULL retrieving subnode \"%s\"", name);
34
35	tag = fdt32_to_cpu(nh->tag);
36
37	if (tag != FDT_BEGIN_NODE)
38		FAIL("Incorrect tag 0x%08x on property \"%s\"", tag, name);
39	if (!nodename_eq(nh->name, name))
40		FAIL("Subnode name mismatch \"%s\" instead of \"%s\"",
41		     nh->name, name);
42
43	return offset;
44}
45
46int main(int argc, char *argv[])
47{
48	void *fdt;
49	int subnode1_offset, subnode2_offset;
50	int subsubnode1_offset, subsubnode2_offset, subsubnode2_offset2;
51	int ss12_off, ss21_off;
52
53	test_init(argc, argv);
54	fdt = load_blob_arg(argc, argv);
55
56	subnode1_offset = check_subnode(fdt, 0, "subnode@1");
57	subnode2_offset = check_subnode(fdt, 0, "subnode@2");
58
59	if (subnode1_offset == subnode2_offset)
60		FAIL("Different subnodes have same offset");
61
62	check_property_cell(fdt, subnode1_offset, "prop-int", TEST_VALUE_1);
63	check_property_cell(fdt, subnode2_offset, "prop-int", TEST_VALUE_2);
64
65	subsubnode1_offset = check_subnode(fdt, subnode1_offset, "subsubnode");
66	subsubnode2_offset = check_subnode(fdt, subnode2_offset, "subsubnode@0");
67	subsubnode2_offset2 = check_subnode(fdt, subnode2_offset, "subsubnode");
68
69	check_property_cell(fdt, subsubnode1_offset, "prop-int", TEST_VALUE_1);
70	check_property_cell(fdt, subsubnode2_offset, "prop-int", TEST_VALUE_2);
71	check_property_cell(fdt, subsubnode2_offset2, "prop-int", TEST_VALUE_2);
72
73	if (subsubnode2_offset != subsubnode2_offset2)
74		FAIL("Different offsets with and without unit address");
75
76	check_subnode(fdt, subnode1_offset, "ss1");
77	ss21_off = fdt_subnode_offset(fdt, subnode2_offset, "ss1");
78	if (ss21_off != -FDT_ERR_NOTFOUND)
79		FAIL("Incorrectly found ss1 in subnode2");
80
81	ss12_off = fdt_subnode_offset(fdt, subnode1_offset, "ss2");
82	if (ss12_off != -FDT_ERR_NOTFOUND)
83		FAIL("Incorrectly found ss2 in subnode1");
84	check_subnode(fdt, subnode2_offset, "ss2");
85
86	PASS();
87}
88