164 lines
3.7 KiB
C
Executable file
164 lines
3.7 KiB
C
Executable file
// SPDX-License-Identifier: GPL-2.0
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/*
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* fdtdump.c - Contributed by Pantelis Antoniou <pantelis.antoniou AT gmail.com>
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*/
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#include <stdint.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <ctype.h>
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#include <fdt.h>
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#include <libfdt_env.h>
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#include "util.h"
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#define ALIGN(x, a) (((x) + ((a) - 1)) & ~((a) - 1))
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#define PALIGN(p, a) ((void *)(ALIGN((unsigned long)(p), (a))))
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#define GET_CELL(p) (p += 4, *((const uint32_t *)(p-4)))
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static void print_data(const char *data, int len)
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{
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int i;
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const char *p = data;
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/* no data, don't print */
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if (len == 0)
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return;
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if (util_is_printable_string(data, len)) {
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printf(" = \"%s\"", (const char *)data);
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} else if ((len % 4) == 0) {
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printf(" = <");
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for (i = 0; i < len; i += 4)
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printf("0x%08x%s", fdt32_to_cpu(GET_CELL(p)),
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i < (len - 4) ? " " : "");
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printf(">");
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} else {
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printf(" = [");
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for (i = 0; i < len; i++)
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printf("%02x%s", *p++, i < len - 1 ? " " : "");
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printf("]");
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}
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}
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static void dump_blob(void *blob)
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{
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struct fdt_header *bph = blob;
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uint32_t off_mem_rsvmap = fdt32_to_cpu(bph->off_mem_rsvmap);
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uint32_t off_dt = fdt32_to_cpu(bph->off_dt_struct);
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uint32_t off_str = fdt32_to_cpu(bph->off_dt_strings);
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struct fdt_reserve_entry *p_rsvmap =
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(struct fdt_reserve_entry *)((char *)blob + off_mem_rsvmap);
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const char *p_struct = (const char *)blob + off_dt;
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const char *p_strings = (const char *)blob + off_str;
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uint32_t version = fdt32_to_cpu(bph->version);
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uint32_t totalsize = fdt32_to_cpu(bph->totalsize);
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uint32_t tag;
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const char *p, *s, *t;
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int depth, sz, shift;
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int i;
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uint64_t addr, size;
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depth = 0;
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shift = 4;
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printf("/dts-v1/;\n");
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printf("// magic:\t\t0x%x\n", fdt32_to_cpu(bph->magic));
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printf("// totalsize:\t\t0x%x (%d)\n", totalsize, totalsize);
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printf("// off_dt_struct:\t0x%x\n", off_dt);
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printf("// off_dt_strings:\t0x%x\n", off_str);
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printf("// off_mem_rsvmap:\t0x%x\n", off_mem_rsvmap);
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printf("// version:\t\t%d\n", version);
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printf("// last_comp_version:\t%d\n",
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fdt32_to_cpu(bph->last_comp_version));
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if (version >= 2)
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printf("// boot_cpuid_phys:\t0x%x\n",
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fdt32_to_cpu(bph->boot_cpuid_phys));
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if (version >= 3)
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printf("// size_dt_strings:\t0x%x\n",
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fdt32_to_cpu(bph->size_dt_strings));
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if (version >= 17)
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printf("// size_dt_struct:\t0x%x\n",
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fdt32_to_cpu(bph->size_dt_struct));
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printf("\n");
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for (i = 0; ; i++) {
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addr = fdt64_to_cpu(p_rsvmap[i].address);
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size = fdt64_to_cpu(p_rsvmap[i].size);
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if (addr == 0 && size == 0)
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break;
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printf("/memreserve/ %llx %llx;\n",
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(unsigned long long)addr, (unsigned long long)size);
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}
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p = p_struct;
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while ((tag = fdt32_to_cpu(GET_CELL(p))) != FDT_END) {
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/* printf("tag: 0x%08x (%d)\n", tag, p - p_struct); */
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if (tag == FDT_BEGIN_NODE) {
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s = p;
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p = PALIGN(p + strlen(s) + 1, 4);
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if (*s == '\0')
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s = "/";
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printf("%*s%s {\n", depth * shift, "", s);
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depth++;
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continue;
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}
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if (tag == FDT_END_NODE) {
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depth--;
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printf("%*s};\n", depth * shift, "");
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continue;
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}
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if (tag == FDT_NOP) {
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printf("%*s// [NOP]\n", depth * shift, "");
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continue;
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}
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if (tag != FDT_PROP) {
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fprintf(stderr, "%*s ** Unknown tag 0x%08x\n", depth * shift, "", tag);
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break;
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}
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sz = fdt32_to_cpu(GET_CELL(p));
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s = p_strings + fdt32_to_cpu(GET_CELL(p));
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if (version < 16 && sz >= 8)
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p = PALIGN(p, 8);
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t = p;
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p = PALIGN(p + sz, 4);
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printf("%*s%s", depth * shift, "", s);
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print_data(t, sz);
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printf(";\n");
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}
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}
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int main(int argc, char *argv[])
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{
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char *buf;
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if (argc < 2) {
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fprintf(stderr, "supply input filename\n");
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return 5;
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}
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buf = utilfdt_read(argv[1]);
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if (buf)
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dump_blob(buf);
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else
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return 10;
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return 0;
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}
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