2 * (C) Copyright David Gibson <dwg@au1.ibm.com>, IBM Corporation. 2005.
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License as
7 * published by the Free Software Foundation; either version 2 of the
8 * License, or (at your option) any later version.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
24 #define FTF_FULLPATH 0x1
25 #define FTF_VARALIGN 0x2
26 #define FTF_NAMEPROPS 0x4
27 #define FTF_BOOTCPUID 0x8
28 #define FTF_STRTABSIZE 0x10
29 #define FTF_STRUCTSIZE 0x20
32 static struct version_info {
34 int last_comp_version;
39 FTF_FULLPATH|FTF_VARALIGN|FTF_NAMEPROPS},
41 FTF_FULLPATH|FTF_VARALIGN|FTF_NAMEPROPS|FTF_BOOTCPUID},
43 FTF_FULLPATH|FTF_VARALIGN|FTF_NAMEPROPS|FTF_BOOTCPUID|FTF_STRTABSIZE},
45 FTF_BOOTCPUID|FTF_STRTABSIZE|FTF_NOPS},
46 {17, 16, FDT_V17_SIZE,
47 FTF_BOOTCPUID|FTF_STRTABSIZE|FTF_STRUCTSIZE|FTF_NOPS},
51 void (*cell)(void *, cell_t);
52 void (*string)(void *, const char *, int);
53 void (*align)(void *, int);
54 void (*data)(void *, struct data);
55 void (*beginnode)(void *, struct label *labels);
56 void (*endnode)(void *, struct label *labels);
57 void (*property)(void *, struct label *labels);
60 static void bin_emit_cell(void *e, cell_t val)
62 struct data *dtbuf = e;
64 *dtbuf = data_append_cell(*dtbuf, val);
67 static void bin_emit_string(void *e, const char *str, int len)
69 struct data *dtbuf = e;
74 *dtbuf = data_append_data(*dtbuf, str, len);
75 *dtbuf = data_append_byte(*dtbuf, '\0');
78 static void bin_emit_align(void *e, int a)
80 struct data *dtbuf = e;
82 *dtbuf = data_append_align(*dtbuf, a);
85 static void bin_emit_data(void *e, struct data d)
87 struct data *dtbuf = e;
89 *dtbuf = data_append_data(*dtbuf, d.val, d.len);
92 static void bin_emit_beginnode(void *e, struct label *labels)
94 bin_emit_cell(e, FDT_BEGIN_NODE);
97 static void bin_emit_endnode(void *e, struct label *labels)
99 bin_emit_cell(e, FDT_END_NODE);
102 static void bin_emit_property(void *e, struct label *labels)
104 bin_emit_cell(e, FDT_PROP);
107 static struct emitter bin_emitter = {
108 .cell = bin_emit_cell,
109 .string = bin_emit_string,
110 .align = bin_emit_align,
111 .data = bin_emit_data,
112 .beginnode = bin_emit_beginnode,
113 .endnode = bin_emit_endnode,
114 .property = bin_emit_property,
117 static void emit_label(FILE *f, const char *prefix, const char *label)
119 fprintf(f, "\t.globl\t%s_%s\n", prefix, label);
120 fprintf(f, "%s_%s:\n", prefix, label);
121 fprintf(f, "_%s_%s:\n", prefix, label);
124 static void emit_offset_label(FILE *f, const char *label, int offset)
126 fprintf(f, "\t.globl\t%s\n", label);
127 fprintf(f, "%s\t= . + %d\n", label, offset);
130 #define ASM_EMIT_BELONG(f, fmt, ...) \
132 fprintf((f), "\t.byte\t((" fmt ") >> 24) & 0xff\n", __VA_ARGS__); \
133 fprintf((f), "\t.byte\t((" fmt ") >> 16) & 0xff\n", __VA_ARGS__); \
134 fprintf((f), "\t.byte\t((" fmt ") >> 8) & 0xff\n", __VA_ARGS__); \
135 fprintf((f), "\t.byte\t(" fmt ") & 0xff\n", __VA_ARGS__); \
138 static void asm_emit_cell(void *e, cell_t val)
142 fprintf(f, "\t.byte 0x%02x; .byte 0x%02x; .byte 0x%02x; .byte 0x%02x\n",
143 (val >> 24) & 0xff, (val >> 16) & 0xff,
144 (val >> 8) & 0xff, val & 0xff);
147 static void asm_emit_string(void *e, const char *str, int len)
152 fprintf(f, "\t.string\t\"%.*s\"\n", len, str);
154 fprintf(f, "\t.string\t\"%s\"\n", str);
157 static void asm_emit_align(void *e, int a)
161 fprintf(f, "\t.balign\t%d, 0\n", a);
164 static void asm_emit_data(void *e, struct data d)
168 struct marker *m = d.markers;
170 for_each_marker_of_type(m, LABEL)
171 emit_offset_label(f, m->ref, m->offset);
173 while ((d.len - off) >= sizeof(uint32_t)) {
174 asm_emit_cell(e, fdt32_to_cpu(*((fdt32_t *)(d.val+off))));
175 off += sizeof(uint32_t);
178 while ((d.len - off) >= 1) {
179 fprintf(f, "\t.byte\t0x%hhx\n", d.val[off]);
183 assert(off == d.len);
186 static void asm_emit_beginnode(void *e, struct label *labels)
191 for_each_label(labels, l) {
192 fprintf(f, "\t.globl\t%s\n", l->label);
193 fprintf(f, "%s:\n", l->label);
195 fprintf(f, "\t/* FDT_BEGIN_NODE */\n");
196 asm_emit_cell(e, FDT_BEGIN_NODE);
199 static void asm_emit_endnode(void *e, struct label *labels)
204 fprintf(f, "\t/* FDT_END_NODE */\n");
205 asm_emit_cell(e, FDT_END_NODE);
206 for_each_label(labels, l) {
207 fprintf(f, "\t.globl\t%s_end\n", l->label);
208 fprintf(f, "%s_end:\n", l->label);
212 static void asm_emit_property(void *e, struct label *labels)
217 for_each_label(labels, l) {
218 fprintf(f, "\t.globl\t%s\n", l->label);
219 fprintf(f, "%s:\n", l->label);
221 fprintf(f, "\t/* FDT_PROP */\n");
222 asm_emit_cell(e, FDT_PROP);
225 static struct emitter asm_emitter = {
226 .cell = asm_emit_cell,
227 .string = asm_emit_string,
228 .align = asm_emit_align,
229 .data = asm_emit_data,
230 .beginnode = asm_emit_beginnode,
231 .endnode = asm_emit_endnode,
232 .property = asm_emit_property,
235 static int stringtable_insert(struct data *d, const char *str)
239 /* FIXME: do this more efficiently? */
241 for (i = 0; i < d->len; i++) {
242 if (streq(str, d->val + i))
246 *d = data_append_data(*d, str, strlen(str)+1);
250 static void flatten_tree(struct node *tree, struct emitter *emit,
251 void *etarget, struct data *strbuf,
252 struct version_info *vi)
254 struct property *prop;
256 bool seen_name_prop = false;
261 emit->beginnode(etarget, tree->labels);
263 if (vi->flags & FTF_FULLPATH)
264 emit->string(etarget, tree->fullpath, 0);
266 emit->string(etarget, tree->name, 0);
268 emit->align(etarget, sizeof(cell_t));
270 for_each_property(tree, prop) {
273 if (streq(prop->name, "name"))
274 seen_name_prop = true;
276 nameoff = stringtable_insert(strbuf, prop->name);
278 emit->property(etarget, prop->labels);
279 emit->cell(etarget, prop->val.len);
280 emit->cell(etarget, nameoff);
282 if ((vi->flags & FTF_VARALIGN) && (prop->val.len >= 8))
283 emit->align(etarget, 8);
285 emit->data(etarget, prop->val);
286 emit->align(etarget, sizeof(cell_t));
289 if ((vi->flags & FTF_NAMEPROPS) && !seen_name_prop) {
290 emit->property(etarget, NULL);
291 emit->cell(etarget, tree->basenamelen+1);
292 emit->cell(etarget, stringtable_insert(strbuf, "name"));
294 if ((vi->flags & FTF_VARALIGN) && ((tree->basenamelen+1) >= 8))
295 emit->align(etarget, 8);
297 emit->string(etarget, tree->name, tree->basenamelen);
298 emit->align(etarget, sizeof(cell_t));
301 for_each_child(tree, child) {
302 flatten_tree(child, emit, etarget, strbuf, vi);
305 emit->endnode(etarget, tree->labels);
308 static struct data flatten_reserve_list(struct reserve_info *reservelist,
309 struct version_info *vi)
311 struct reserve_info *re;
312 struct data d = empty_data;
315 for (re = reservelist; re; re = re->next) {
316 d = data_append_re(d, re->address, re->size);
319 * Add additional reserved slots if the user asked for them.
321 for (j = 0; j < reservenum; j++) {
322 d = data_append_re(d, 0, 0);
328 static void make_fdt_header(struct fdt_header *fdt,
329 struct version_info *vi,
330 int reservesize, int dtsize, int strsize,
335 reservesize += sizeof(struct fdt_reserve_entry);
337 memset(fdt, 0xff, sizeof(*fdt));
339 fdt->magic = cpu_to_fdt32(FDT_MAGIC);
340 fdt->version = cpu_to_fdt32(vi->version);
341 fdt->last_comp_version = cpu_to_fdt32(vi->last_comp_version);
343 /* Reserve map should be doubleword aligned */
344 reserve_off = ALIGN(vi->hdr_size, 8);
346 fdt->off_mem_rsvmap = cpu_to_fdt32(reserve_off);
347 fdt->off_dt_struct = cpu_to_fdt32(reserve_off + reservesize);
348 fdt->off_dt_strings = cpu_to_fdt32(reserve_off + reservesize
350 fdt->totalsize = cpu_to_fdt32(reserve_off + reservesize + dtsize + strsize);
352 if (vi->flags & FTF_BOOTCPUID)
353 fdt->boot_cpuid_phys = cpu_to_fdt32(boot_cpuid_phys);
354 if (vi->flags & FTF_STRTABSIZE)
355 fdt->size_dt_strings = cpu_to_fdt32(strsize);
356 if (vi->flags & FTF_STRUCTSIZE)
357 fdt->size_dt_struct = cpu_to_fdt32(dtsize);
360 void dt_to_blob(FILE *f, struct dt_info *dti, int version)
362 struct version_info *vi = NULL;
364 struct data blob = empty_data;
365 struct data reservebuf = empty_data;
366 struct data dtbuf = empty_data;
367 struct data strbuf = empty_data;
368 struct fdt_header fdt;
371 for (i = 0; i < ARRAY_SIZE(version_table); i++) {
372 if (version_table[i].version == version)
373 vi = &version_table[i];
376 die("Unknown device tree blob version %d\n", version);
378 flatten_tree(dti->dt, &bin_emitter, &dtbuf, &strbuf, vi);
379 bin_emit_cell(&dtbuf, FDT_END);
381 reservebuf = flatten_reserve_list(dti->reservelist, vi);
384 make_fdt_header(&fdt, vi, reservebuf.len, dtbuf.len, strbuf.len,
385 dti->boot_cpuid_phys);
388 * If the user asked for more space than is used, adjust the totalsize.
391 padlen = minsize - fdt32_to_cpu(fdt.totalsize);
396 "Warning: blob size %d >= minimum size %d\n",
397 fdt32_to_cpu(fdt.totalsize), minsize);
405 padlen = ALIGN(fdt32_to_cpu(fdt.totalsize) + padlen, alignsize)
406 - fdt32_to_cpu(fdt.totalsize);
409 int tsize = fdt32_to_cpu(fdt.totalsize);
411 fdt.totalsize = cpu_to_fdt32(tsize);
415 * Assemble the blob: start with the header, add with alignment
416 * the reserve buffer, add the reserve map terminating zeroes,
417 * the device tree itself, and finally the strings.
419 blob = data_append_data(blob, &fdt, vi->hdr_size);
420 blob = data_append_align(blob, 8);
421 blob = data_merge(blob, reservebuf);
422 blob = data_append_zeroes(blob, sizeof(struct fdt_reserve_entry));
423 blob = data_merge(blob, dtbuf);
424 blob = data_merge(blob, strbuf);
427 * If the user asked for more space than is used, pad out the blob.
430 blob = data_append_zeroes(blob, padlen);
432 if (fwrite(blob.val, blob.len, 1, f) != 1) {
434 die("Error writing device tree blob: %s\n",
437 die("Short write on device tree blob\n");
441 * data_merge() frees the right-hand element so only the blob
442 * remains to be freed.
447 static void dump_stringtable_asm(FILE *f, struct data strbuf)
454 while (p < (strbuf.val + strbuf.len)) {
456 fprintf(f, "\t.string \"%s\"\n", p);
461 void dt_to_asm(FILE *f, struct dt_info *dti, int version)
463 struct version_info *vi = NULL;
465 struct data strbuf = empty_data;
466 struct reserve_info *re;
467 const char *symprefix = "dt";
469 for (i = 0; i < ARRAY_SIZE(version_table); i++) {
470 if (version_table[i].version == version)
471 vi = &version_table[i];
474 die("Unknown device tree blob version %d\n", version);
476 fprintf(f, "/* autogenerated by dtc, do not edit */\n\n");
478 emit_label(f, symprefix, "blob_start");
479 emit_label(f, symprefix, "header");
480 fprintf(f, "\t/* magic */\n");
481 asm_emit_cell(f, FDT_MAGIC);
482 fprintf(f, "\t/* totalsize */\n");
483 ASM_EMIT_BELONG(f, "_%s_blob_abs_end - _%s_blob_start",
484 symprefix, symprefix);
485 fprintf(f, "\t/* off_dt_struct */\n");
486 ASM_EMIT_BELONG(f, "_%s_struct_start - _%s_blob_start",
487 symprefix, symprefix);
488 fprintf(f, "\t/* off_dt_strings */\n");
489 ASM_EMIT_BELONG(f, "_%s_strings_start - _%s_blob_start",
490 symprefix, symprefix);
491 fprintf(f, "\t/* off_mem_rsvmap */\n");
492 ASM_EMIT_BELONG(f, "_%s_reserve_map - _%s_blob_start",
493 symprefix, symprefix);
494 fprintf(f, "\t/* version */\n");
495 asm_emit_cell(f, vi->version);
496 fprintf(f, "\t/* last_comp_version */\n");
497 asm_emit_cell(f, vi->last_comp_version);
499 if (vi->flags & FTF_BOOTCPUID) {
500 fprintf(f, "\t/* boot_cpuid_phys */\n");
501 asm_emit_cell(f, dti->boot_cpuid_phys);
504 if (vi->flags & FTF_STRTABSIZE) {
505 fprintf(f, "\t/* size_dt_strings */\n");
506 ASM_EMIT_BELONG(f, "_%s_strings_end - _%s_strings_start",
507 symprefix, symprefix);
510 if (vi->flags & FTF_STRUCTSIZE) {
511 fprintf(f, "\t/* size_dt_struct */\n");
512 ASM_EMIT_BELONG(f, "_%s_struct_end - _%s_struct_start",
513 symprefix, symprefix);
517 * Reserve map entries.
518 * Align the reserve map to a doubleword boundary.
519 * Each entry is an (address, size) pair of u64 values.
520 * Always supply a zero-sized temination entry.
522 asm_emit_align(f, 8);
523 emit_label(f, symprefix, "reserve_map");
525 fprintf(f, "/* Memory reserve map from source file */\n");
528 * Use .long on high and low halfs of u64s to avoid .quad
529 * as it appears .quad isn't available in some assemblers.
531 for (re = dti->reservelist; re; re = re->next) {
534 for_each_label(re->labels, l) {
535 fprintf(f, "\t.globl\t%s\n", l->label);
536 fprintf(f, "%s:\n", l->label);
538 ASM_EMIT_BELONG(f, "0x%08x", (unsigned int)(re->address >> 32));
539 ASM_EMIT_BELONG(f, "0x%08x",
540 (unsigned int)(re->address & 0xffffffff));
541 ASM_EMIT_BELONG(f, "0x%08x", (unsigned int)(re->size >> 32));
542 ASM_EMIT_BELONG(f, "0x%08x", (unsigned int)(re->size & 0xffffffff));
544 for (i = 0; i < reservenum; i++) {
545 fprintf(f, "\t.long\t0, 0\n\t.long\t0, 0\n");
548 fprintf(f, "\t.long\t0, 0\n\t.long\t0, 0\n");
550 emit_label(f, symprefix, "struct_start");
551 flatten_tree(dti->dt, &asm_emitter, f, &strbuf, vi);
553 fprintf(f, "\t/* FDT_END */\n");
554 asm_emit_cell(f, FDT_END);
555 emit_label(f, symprefix, "struct_end");
557 emit_label(f, symprefix, "strings_start");
558 dump_stringtable_asm(f, strbuf);
559 emit_label(f, symprefix, "strings_end");
561 emit_label(f, symprefix, "blob_end");
564 * If the user asked for more space than is used, pad it out.
567 fprintf(f, "\t.space\t%d - (_%s_blob_end - _%s_blob_start), 0\n",
568 minsize, symprefix, symprefix);
571 fprintf(f, "\t.space\t%d, 0\n", padsize);
574 asm_emit_align(f, alignsize);
575 emit_label(f, symprefix, "blob_abs_end");
581 char *base, *limit, *ptr;
584 static void inbuf_init(struct inbuf *inb, void *base, void *limit)
588 inb->ptr = inb->base;
591 static void flat_read_chunk(struct inbuf *inb, void *p, int len)
593 if ((inb->ptr + len) > inb->limit)
594 die("Premature end of data parsing flat device tree\n");
596 memcpy(p, inb->ptr, len);
601 static uint32_t flat_read_word(struct inbuf *inb)
605 assert(((inb->ptr - inb->base) % sizeof(val)) == 0);
607 flat_read_chunk(inb, &val, sizeof(val));
609 return fdt32_to_cpu(val);
612 static void flat_realign(struct inbuf *inb, int align)
614 int off = inb->ptr - inb->base;
616 inb->ptr = inb->base + ALIGN(off, align);
617 if (inb->ptr > inb->limit)
618 die("Premature end of data parsing flat device tree\n");
621 static char *flat_read_string(struct inbuf *inb)
624 const char *p = inb->ptr;
629 die("Premature end of data parsing flat device tree\n");
631 } while ((*p++) != '\0');
633 str = xstrdup(inb->ptr);
637 flat_realign(inb, sizeof(uint32_t));
642 static struct data flat_read_data(struct inbuf *inb, int len)
644 struct data d = empty_data;
649 d = data_grow_for(d, len);
652 flat_read_chunk(inb, d.val, len);
654 flat_realign(inb, sizeof(uint32_t));
659 static char *flat_read_stringtable(struct inbuf *inb, int offset)
663 p = inb->base + offset;
665 if (p >= inb->limit || p < inb->base)
666 die("String offset %d overruns string table\n",
675 return xstrdup(inb->base + offset);
678 static struct property *flat_read_property(struct inbuf *dtbuf,
679 struct inbuf *strbuf, int flags)
681 uint32_t proplen, stroff;
685 proplen = flat_read_word(dtbuf);
686 stroff = flat_read_word(dtbuf);
688 name = flat_read_stringtable(strbuf, stroff);
690 if ((flags & FTF_VARALIGN) && (proplen >= 8))
691 flat_realign(dtbuf, 8);
693 val = flat_read_data(dtbuf, proplen);
695 return build_property(name, val);
699 static struct reserve_info *flat_read_mem_reserve(struct inbuf *inb)
701 struct reserve_info *reservelist = NULL;
702 struct reserve_info *new;
703 struct fdt_reserve_entry re;
706 * Each entry is a pair of u64 (addr, size) values for 4 cell_t's.
707 * List terminates at an entry with size equal to zero.
709 * First pass, count entries.
712 uint64_t address, size;
714 flat_read_chunk(inb, &re, sizeof(re));
715 address = fdt64_to_cpu(re.address);
716 size = fdt64_to_cpu(re.size);
720 new = build_reserve_entry(address, size);
721 reservelist = add_reserve_entry(reservelist, new);
728 static char *nodename_from_path(const char *ppath, const char *cpath)
732 plen = strlen(ppath);
734 if (!strstarts(cpath, ppath))
735 die("Path \"%s\" is not valid as a child of \"%s\"\n",
738 /* root node is a special case */
739 if (!streq(ppath, "/"))
742 return xstrdup(cpath + plen);
745 static struct node *unflatten_tree(struct inbuf *dtbuf,
746 struct inbuf *strbuf,
747 const char *parent_flatname, int flags)
753 node = build_node(NULL, NULL);
755 flatname = flat_read_string(dtbuf);
757 if (flags & FTF_FULLPATH)
758 node->name = nodename_from_path(parent_flatname, flatname);
760 node->name = flatname;
763 struct property *prop;
766 val = flat_read_word(dtbuf);
770 fprintf(stderr, "Warning: Flat tree input has "
771 "subnodes preceding a property.\n");
772 prop = flat_read_property(dtbuf, strbuf, flags);
773 add_property(node, prop);
777 child = unflatten_tree(dtbuf,strbuf, flatname, flags);
778 add_child(node, child);
785 die("Premature FDT_END in device tree blob\n");
789 if (!(flags & FTF_NOPS))
790 fprintf(stderr, "Warning: NOP tag found in flat tree"
797 die("Invalid opcode word %08x in device tree blob\n",
800 } while (val != FDT_END_NODE);
802 if (node->name != flatname) {
810 struct dt_info *dt_from_blob(const char *fname)
813 fdt32_t magic_buf, totalsize_buf;
814 uint32_t magic, totalsize, version, size_dt, boot_cpuid_phys;
815 uint32_t off_dt, off_str, off_mem_rsvmap;
818 struct fdt_header *fdt;
820 struct inbuf dtbuf, strbuf;
821 struct inbuf memresvbuf;
823 struct reserve_info *reservelist;
828 f = srcfile_relative_open(fname, NULL);
830 rc = fread(&magic_buf, sizeof(magic_buf), 1, f);
832 die("Error reading DT blob magic number: %s\n",
836 die("EOF reading DT blob magic number\n");
838 die("Mysterious short read reading magic number\n");
841 magic = fdt32_to_cpu(magic_buf);
842 if (magic != FDT_MAGIC)
843 die("Blob has incorrect magic number\n");
845 rc = fread(&totalsize_buf, sizeof(totalsize_buf), 1, f);
847 die("Error reading DT blob size: %s\n", strerror(errno));
850 die("EOF reading DT blob size\n");
852 die("Mysterious short read reading blob size\n");
855 totalsize = fdt32_to_cpu(totalsize_buf);
856 if (totalsize < FDT_V1_SIZE)
857 die("DT blob size (%d) is too small\n", totalsize);
859 blob = xmalloc(totalsize);
861 fdt = (struct fdt_header *)blob;
862 fdt->magic = cpu_to_fdt32(magic);
863 fdt->totalsize = cpu_to_fdt32(totalsize);
865 sizeleft = totalsize - sizeof(magic) - sizeof(totalsize);
866 p = blob + sizeof(magic) + sizeof(totalsize);
870 die("EOF before reading %d bytes of DT blob\n",
873 rc = fread(p, 1, sizeleft, f);
875 die("Error reading DT blob: %s\n",
882 off_dt = fdt32_to_cpu(fdt->off_dt_struct);
883 off_str = fdt32_to_cpu(fdt->off_dt_strings);
884 off_mem_rsvmap = fdt32_to_cpu(fdt->off_mem_rsvmap);
885 version = fdt32_to_cpu(fdt->version);
886 boot_cpuid_phys = fdt32_to_cpu(fdt->boot_cpuid_phys);
888 if (off_mem_rsvmap >= totalsize)
889 die("Mem Reserve structure offset exceeds total size\n");
891 if (off_dt >= totalsize)
892 die("DT structure offset exceeds total size\n");
894 if (off_str > totalsize)
895 die("String table offset exceeds total size\n");
898 uint32_t size_str = fdt32_to_cpu(fdt->size_dt_strings);
899 if ((off_str+size_str < off_str) || (off_str+size_str > totalsize))
900 die("String table extends past total size\n");
901 inbuf_init(&strbuf, blob + off_str, blob + off_str + size_str);
903 inbuf_init(&strbuf, blob + off_str, blob + totalsize);
907 size_dt = fdt32_to_cpu(fdt->size_dt_struct);
908 if ((off_dt+size_dt < off_dt) || (off_dt+size_dt > totalsize))
909 die("Structure block extends past total size\n");
913 flags |= FTF_FULLPATH | FTF_NAMEPROPS | FTF_VARALIGN;
918 inbuf_init(&memresvbuf,
919 blob + off_mem_rsvmap, blob + totalsize);
920 inbuf_init(&dtbuf, blob + off_dt, blob + totalsize);
922 reservelist = flat_read_mem_reserve(&memresvbuf);
924 val = flat_read_word(&dtbuf);
926 if (val != FDT_BEGIN_NODE)
927 die("Device tree blob doesn't begin with FDT_BEGIN_NODE (begins with 0x%08x)\n", val);
929 tree = unflatten_tree(&dtbuf, &strbuf, "", flags);
931 val = flat_read_word(&dtbuf);
933 die("Device tree blob doesn't end with FDT_END\n");
939 return build_dt_info(DTSF_V1, reservelist, tree, boot_cpuid_phys);