summaryrefslogtreecommitdiffstats
path: root/scripts/dtc/fdtdump.c
blob: 7d460a50b513d0557990e6534870bbdd9e000533 (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
// SPDX-License-Identifier: GPL-2.0
/*
 * fdtdump.c - Contributed by Pantelis Antoniou <pantelis.antoniou AT gmail.com>
 */

#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>

#include <fdt.h>
#include <libfdt_env.h>

#include "util.h"

#define ALIGN(x, a)	(((x) + ((a) - 1)) & ~((a) - 1))
#define PALIGN(p, a)	((void *)(ALIGN((unsigned long)(p), (a))))
#define GET_CELL(p)	(p += 4, *((const uint32_t *)(p-4)))

static void print_data(const char *data, int len)
{
	int i;
	const char *p = data;

	/* no data, don't print */
	if (len == 0)
		return;

	if (util_is_printable_string(data, len)) {
		printf(" = \"%s\"", (const char *)data);
	} else if ((len % 4) == 0) {
		printf(" = <");
		for (i = 0; i < len; i += 4)
			printf("0x%08x%s", fdt32_to_cpu(GET_CELL(p)),
			       i < (len - 4) ? " " : "");
		printf(">");
	} else {
		printf(" = [");
		for (i = 0; i < len; i++)
			printf("%02x%s", *p++, i < len - 1 ? " " : "");
		printf("]");
	}
}

static void dump_blob(void *blob)
{
	struct fdt_header *bph = blob;
	uint32_t off_mem_rsvmap = fdt32_to_cpu(bph->off_mem_rsvmap);
	uint32_t off_dt = fdt32_to_cpu(bph->off_dt_struct);
	uint32_t off_str = fdt32_to_cpu(bph->off_dt_strings);
	struct fdt_reserve_entry *p_rsvmap =
		(struct fdt_reserve_entry *)((char *)blob + off_mem_rsvmap);
	const char *p_struct = (const char *)blob + off_dt;
	const char *p_strings = (const char *)blob + off_str;
	uint32_t version = fdt32_to_cpu(bph->version);
	uint32_t totalsize = fdt32_to_cpu(bph->totalsize);
	uint32_t tag;
	const char *p, *s, *t;
	int depth, sz, shift;
	int i;
	uint64_t addr, size;

	depth = 0;
	shift = 4;

	printf("/dts-v1/;\n");
	printf("// magic:\t\t0x%x\n", fdt32_to_cpu(bph->magic));
	printf("// totalsize:\t\t0x%x (%d)\n", totalsize, totalsize);
	printf("// off_dt_struct:\t0x%x\n", off_dt);
	printf("// off_dt_strings:\t0x%x\n", off_str);
	printf("// off_mem_rsvmap:\t0x%x\n", off_mem_rsvmap);
	printf("// version:\t\t%d\n", version);
	printf("// last_comp_version:\t%d\n",
	       fdt32_to_cpu(bph->last_comp_version));
	if (version >= 2)
		printf("// boot_cpuid_phys:\t0x%x\n",
		       fdt32_to_cpu(bph->boot_cpuid_phys));

	if (version >= 3)
		printf("// size_dt_strings:\t0x%x\n",
		       fdt32_to_cpu(bph->size_dt_strings));
	if (version >= 17)
		printf("// size_dt_struct:\t0x%x\n",
		       fdt32_to_cpu(bph->size_dt_struct));
	printf("\n");

	for (i = 0; ; i++) {
		addr = fdt64_to_cpu(p_rsvmap[i].address);
		size = fdt64_to_cpu(p_rsvmap[i].size);
		if (addr == 0 && size == 0)
			break;

		printf("/memreserve/ %llx %llx;\n",
		       (unsigned long long)addr, (unsigned long long)size);
	}

	p = p_struct;
	while ((tag = fdt32_to_cpu(GET_CELL(p))) != FDT_END) {

		/* printf("tag: 0x%08x (%d)\n", tag, p - p_struct); */

		if (tag == FDT_BEGIN_NODE) {
			s = p;
			p = PALIGN(p + strlen(s) + 1, 4);

			if (*s == '\0')
				s = "/";

			printf("%*s%s {\n", depth * shift, "", s);

			depth++;
			continue;
		}

		if (tag == FDT_END_NODE) {
			depth--;

			printf("%*s};\n", depth * shift, "");
			continue;
		}

		if (tag == FDT_NOP) {
			printf("%*s// [NOP]\n", depth * shift, "");
			continue;
		}

		if (tag != FDT_PROP) {
			fprintf(stderr, "%*s ** Unknown tag 0x%08x\n", depth * shift, "", tag);
			break;
		}
		sz = fdt32_to_cpu(GET_CELL(p));
		s = p_strings + fdt32_to_cpu(GET_CELL(p));
		if (version < 16 && sz >= 8)
			p = PALIGN(p, 8);
		t = p;

		p = PALIGN(p + sz, 4);

		printf("%*s%s", depth * shift, "", s);
		print_data(t, sz);
		printf(";\n");
	}
}


int main(int argc, char *argv[])
{
	char *buf;

	if (argc < 2) {
		fprintf(stderr, "supply input filename\n");
		return 5;
	}

	buf = utilfdt_read(argv[1]);
	if (buf)
		dump_blob(buf);
	else
		return 10;

	return 0;
}
OpenPOWER on IntegriCloud