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
check_subnode(struct fdt_header * fdt,int parent,const char * name)19 static 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
main(int argc,char * argv[])46 int 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