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a4da2e3e DG |
1 | /* |
2 | * (C) Copyright David Gibson <dwg@au1.ibm.com>, IBM Corporation. 2005. | |
3 | * | |
4 | * | |
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. | |
9 | * | |
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. | |
14 | * | |
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 | |
18 | * USA | |
19 | */ | |
20 | ||
21 | #include "dtc.h" | |
ed95d745 | 22 | #include "srcpos.h" |
a4da2e3e DG |
23 | |
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 | |
30 | #define FTF_NOPS 0x40 | |
31 | ||
32 | static struct version_info { | |
33 | int version; | |
34 | int last_comp_version; | |
35 | int hdr_size; | |
36 | int flags; | |
37 | } version_table[] = { | |
38 | {1, 1, FDT_V1_SIZE, | |
39 | FTF_FULLPATH|FTF_VARALIGN|FTF_NAMEPROPS}, | |
40 | {2, 1, FDT_V2_SIZE, | |
41 | FTF_FULLPATH|FTF_VARALIGN|FTF_NAMEPROPS|FTF_BOOTCPUID}, | |
42 | {3, 1, FDT_V3_SIZE, | |
43 | FTF_FULLPATH|FTF_VARALIGN|FTF_NAMEPROPS|FTF_BOOTCPUID|FTF_STRTABSIZE}, | |
44 | {16, 16, FDT_V3_SIZE, | |
45 | FTF_BOOTCPUID|FTF_STRTABSIZE|FTF_NOPS}, | |
46 | {17, 16, FDT_V17_SIZE, | |
47 | FTF_BOOTCPUID|FTF_STRTABSIZE|FTF_STRUCTSIZE|FTF_NOPS}, | |
48 | }; | |
49 | ||
50 | struct emitter { | |
51 | void (*cell)(void *, cell_t); | |
52 | void (*string)(void *, char *, int); | |
53 | void (*align)(void *, int); | |
54 | void (*data)(void *, struct data); | |
658f29a5 JB |
55 | void (*beginnode)(void *, struct label *labels); |
56 | void (*endnode)(void *, struct label *labels); | |
57 | void (*property)(void *, struct label *labels); | |
a4da2e3e DG |
58 | }; |
59 | ||
60 | static void bin_emit_cell(void *e, cell_t val) | |
61 | { | |
62 | struct data *dtbuf = e; | |
63 | ||
64 | *dtbuf = data_append_cell(*dtbuf, val); | |
65 | } | |
66 | ||
67 | static void bin_emit_string(void *e, char *str, int len) | |
68 | { | |
69 | struct data *dtbuf = e; | |
70 | ||
71 | if (len == 0) | |
72 | len = strlen(str); | |
73 | ||
74 | *dtbuf = data_append_data(*dtbuf, str, len); | |
75 | *dtbuf = data_append_byte(*dtbuf, '\0'); | |
76 | } | |
77 | ||
78 | static void bin_emit_align(void *e, int a) | |
79 | { | |
80 | struct data *dtbuf = e; | |
81 | ||
82 | *dtbuf = data_append_align(*dtbuf, a); | |
83 | } | |
84 | ||
85 | static void bin_emit_data(void *e, struct data d) | |
86 | { | |
87 | struct data *dtbuf = e; | |
88 | ||
89 | *dtbuf = data_append_data(*dtbuf, d.val, d.len); | |
90 | } | |
91 | ||
658f29a5 | 92 | static void bin_emit_beginnode(void *e, struct label *labels) |
a4da2e3e DG |
93 | { |
94 | bin_emit_cell(e, FDT_BEGIN_NODE); | |
95 | } | |
96 | ||
658f29a5 | 97 | static void bin_emit_endnode(void *e, struct label *labels) |
a4da2e3e DG |
98 | { |
99 | bin_emit_cell(e, FDT_END_NODE); | |
100 | } | |
101 | ||
658f29a5 | 102 | static void bin_emit_property(void *e, struct label *labels) |
a4da2e3e DG |
103 | { |
104 | bin_emit_cell(e, FDT_PROP); | |
105 | } | |
106 | ||
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, | |
115 | }; | |
116 | ||
117 | static void emit_label(FILE *f, const char *prefix, const char *label) | |
118 | { | |
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); | |
122 | } | |
123 | ||
124 | static void emit_offset_label(FILE *f, const char *label, int offset) | |
125 | { | |
126 | fprintf(f, "\t.globl\t%s\n", label); | |
127 | fprintf(f, "%s\t= . + %d\n", label, offset); | |
128 | } | |
129 | ||
658f29a5 JB |
130 | #define ASM_EMIT_BELONG(f, fmt, ...) \ |
131 | { \ | |
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__); \ | |
136 | } | |
137 | ||
a4da2e3e DG |
138 | static void asm_emit_cell(void *e, cell_t val) |
139 | { | |
140 | FILE *f = e; | |
141 | ||
658f29a5 JB |
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); | |
a4da2e3e DG |
145 | } |
146 | ||
147 | static void asm_emit_string(void *e, char *str, int len) | |
148 | { | |
149 | FILE *f = e; | |
150 | char c = 0; | |
151 | ||
152 | if (len != 0) { | |
153 | /* XXX: ewww */ | |
154 | c = str[len]; | |
155 | str[len] = '\0'; | |
156 | } | |
157 | ||
158 | fprintf(f, "\t.string\t\"%s\"\n", str); | |
159 | ||
160 | if (len != 0) { | |
161 | str[len] = c; | |
162 | } | |
163 | } | |
164 | ||
165 | static void asm_emit_align(void *e, int a) | |
166 | { | |
167 | FILE *f = e; | |
168 | ||
658f29a5 | 169 | fprintf(f, "\t.balign\t%d, 0\n", a); |
a4da2e3e DG |
170 | } |
171 | ||
172 | static void asm_emit_data(void *e, struct data d) | |
173 | { | |
174 | FILE *f = e; | |
175 | int off = 0; | |
ed95d745 | 176 | struct marker *m = d.markers; |
a4da2e3e | 177 | |
ed95d745 DG |
178 | for_each_marker_of_type(m, LABEL) |
179 | emit_offset_label(f, m->ref, m->offset); | |
a4da2e3e | 180 | |
ed95d745 | 181 | while ((d.len - off) >= sizeof(uint32_t)) { |
658f29a5 | 182 | asm_emit_cell(e, fdt32_to_cpu(*((uint32_t *)(d.val+off)))); |
ed95d745 | 183 | off += sizeof(uint32_t); |
a4da2e3e DG |
184 | } |
185 | ||
ed95d745 | 186 | while ((d.len - off) >= 1) { |
a4da2e3e DG |
187 | fprintf(f, "\t.byte\t0x%hhx\n", d.val[off]); |
188 | off += 1; | |
189 | } | |
190 | ||
191 | assert(off == d.len); | |
192 | } | |
193 | ||
658f29a5 | 194 | static void asm_emit_beginnode(void *e, struct label *labels) |
a4da2e3e DG |
195 | { |
196 | FILE *f = e; | |
658f29a5 | 197 | struct label *l; |
a4da2e3e | 198 | |
658f29a5 JB |
199 | for_each_label(labels, l) { |
200 | fprintf(f, "\t.globl\t%s\n", l->label); | |
201 | fprintf(f, "%s:\n", l->label); | |
a4da2e3e | 202 | } |
658f29a5 JB |
203 | fprintf(f, "\t/* FDT_BEGIN_NODE */\n"); |
204 | asm_emit_cell(e, FDT_BEGIN_NODE); | |
a4da2e3e DG |
205 | } |
206 | ||
658f29a5 | 207 | static void asm_emit_endnode(void *e, struct label *labels) |
a4da2e3e DG |
208 | { |
209 | FILE *f = e; | |
658f29a5 | 210 | struct label *l; |
a4da2e3e | 211 | |
658f29a5 JB |
212 | fprintf(f, "\t/* FDT_END_NODE */\n"); |
213 | asm_emit_cell(e, FDT_END_NODE); | |
214 | for_each_label(labels, l) { | |
215 | fprintf(f, "\t.globl\t%s_end\n", l->label); | |
216 | fprintf(f, "%s_end:\n", l->label); | |
a4da2e3e DG |
217 | } |
218 | } | |
219 | ||
658f29a5 | 220 | static void asm_emit_property(void *e, struct label *labels) |
a4da2e3e DG |
221 | { |
222 | FILE *f = e; | |
658f29a5 | 223 | struct label *l; |
a4da2e3e | 224 | |
658f29a5 JB |
225 | for_each_label(labels, l) { |
226 | fprintf(f, "\t.globl\t%s\n", l->label); | |
227 | fprintf(f, "%s:\n", l->label); | |
a4da2e3e | 228 | } |
658f29a5 JB |
229 | fprintf(f, "\t/* FDT_PROP */\n"); |
230 | asm_emit_cell(e, FDT_PROP); | |
a4da2e3e DG |
231 | } |
232 | ||
233 | static struct emitter asm_emitter = { | |
234 | .cell = asm_emit_cell, | |
235 | .string = asm_emit_string, | |
236 | .align = asm_emit_align, | |
237 | .data = asm_emit_data, | |
238 | .beginnode = asm_emit_beginnode, | |
239 | .endnode = asm_emit_endnode, | |
240 | .property = asm_emit_property, | |
241 | }; | |
242 | ||
243 | static int stringtable_insert(struct data *d, const char *str) | |
244 | { | |
245 | int i; | |
246 | ||
247 | /* FIXME: do this more efficiently? */ | |
248 | ||
249 | for (i = 0; i < d->len; i++) { | |
250 | if (streq(str, d->val + i)) | |
251 | return i; | |
252 | } | |
253 | ||
254 | *d = data_append_data(*d, str, strlen(str)+1); | |
255 | return i; | |
256 | } | |
257 | ||
258 | static void flatten_tree(struct node *tree, struct emitter *emit, | |
259 | void *etarget, struct data *strbuf, | |
260 | struct version_info *vi) | |
261 | { | |
262 | struct property *prop; | |
263 | struct node *child; | |
264 | int seen_name_prop = 0; | |
265 | ||
cd296721 SW |
266 | if (tree->deleted) |
267 | return; | |
268 | ||
658f29a5 | 269 | emit->beginnode(etarget, tree->labels); |
a4da2e3e DG |
270 | |
271 | if (vi->flags & FTF_FULLPATH) | |
272 | emit->string(etarget, tree->fullpath, 0); | |
273 | else | |
274 | emit->string(etarget, tree->name, 0); | |
275 | ||
276 | emit->align(etarget, sizeof(cell_t)); | |
277 | ||
278 | for_each_property(tree, prop) { | |
279 | int nameoff; | |
280 | ||
281 | if (streq(prop->name, "name")) | |
282 | seen_name_prop = 1; | |
283 | ||
284 | nameoff = stringtable_insert(strbuf, prop->name); | |
285 | ||
658f29a5 | 286 | emit->property(etarget, prop->labels); |
a4da2e3e DG |
287 | emit->cell(etarget, prop->val.len); |
288 | emit->cell(etarget, nameoff); | |
289 | ||
290 | if ((vi->flags & FTF_VARALIGN) && (prop->val.len >= 8)) | |
291 | emit->align(etarget, 8); | |
292 | ||
293 | emit->data(etarget, prop->val); | |
294 | emit->align(etarget, sizeof(cell_t)); | |
295 | } | |
296 | ||
297 | if ((vi->flags & FTF_NAMEPROPS) && !seen_name_prop) { | |
298 | emit->property(etarget, NULL); | |
299 | emit->cell(etarget, tree->basenamelen+1); | |
300 | emit->cell(etarget, stringtable_insert(strbuf, "name")); | |
301 | ||
302 | if ((vi->flags & FTF_VARALIGN) && ((tree->basenamelen+1) >= 8)) | |
303 | emit->align(etarget, 8); | |
304 | ||
305 | emit->string(etarget, tree->name, tree->basenamelen); | |
306 | emit->align(etarget, sizeof(cell_t)); | |
307 | } | |
308 | ||
309 | for_each_child(tree, child) { | |
310 | flatten_tree(child, emit, etarget, strbuf, vi); | |
311 | } | |
312 | ||
658f29a5 | 313 | emit->endnode(etarget, tree->labels); |
a4da2e3e DG |
314 | } |
315 | ||
316 | static struct data flatten_reserve_list(struct reserve_info *reservelist, | |
317 | struct version_info *vi) | |
318 | { | |
319 | struct reserve_info *re; | |
320 | struct data d = empty_data; | |
321 | static struct fdt_reserve_entry null_re = {0,0}; | |
322 | int j; | |
323 | ||
324 | for (re = reservelist; re; re = re->next) { | |
325 | d = data_append_re(d, &re->re); | |
326 | } | |
327 | /* | |
328 | * Add additional reserved slots if the user asked for them. | |
329 | */ | |
330 | for (j = 0; j < reservenum; j++) { | |
331 | d = data_append_re(d, &null_re); | |
332 | } | |
333 | ||
334 | return d; | |
335 | } | |
336 | ||
337 | static void make_fdt_header(struct fdt_header *fdt, | |
338 | struct version_info *vi, | |
339 | int reservesize, int dtsize, int strsize, | |
340 | int boot_cpuid_phys) | |
341 | { | |
342 | int reserve_off; | |
343 | ||
344 | reservesize += sizeof(struct fdt_reserve_entry); | |
345 | ||
346 | memset(fdt, 0xff, sizeof(*fdt)); | |
347 | ||
ed95d745 DG |
348 | fdt->magic = cpu_to_fdt32(FDT_MAGIC); |
349 | fdt->version = cpu_to_fdt32(vi->version); | |
350 | fdt->last_comp_version = cpu_to_fdt32(vi->last_comp_version); | |
a4da2e3e DG |
351 | |
352 | /* Reserve map should be doubleword aligned */ | |
353 | reserve_off = ALIGN(vi->hdr_size, 8); | |
354 | ||
ed95d745 DG |
355 | fdt->off_mem_rsvmap = cpu_to_fdt32(reserve_off); |
356 | fdt->off_dt_struct = cpu_to_fdt32(reserve_off + reservesize); | |
357 | fdt->off_dt_strings = cpu_to_fdt32(reserve_off + reservesize | |
a4da2e3e | 358 | + dtsize); |
ed95d745 | 359 | fdt->totalsize = cpu_to_fdt32(reserve_off + reservesize + dtsize + strsize); |
a4da2e3e DG |
360 | |
361 | if (vi->flags & FTF_BOOTCPUID) | |
ed95d745 | 362 | fdt->boot_cpuid_phys = cpu_to_fdt32(boot_cpuid_phys); |
a4da2e3e | 363 | if (vi->flags & FTF_STRTABSIZE) |
ed95d745 | 364 | fdt->size_dt_strings = cpu_to_fdt32(strsize); |
a4da2e3e | 365 | if (vi->flags & FTF_STRUCTSIZE) |
ed95d745 | 366 | fdt->size_dt_struct = cpu_to_fdt32(dtsize); |
a4da2e3e DG |
367 | } |
368 | ||
ed95d745 | 369 | void dt_to_blob(FILE *f, struct boot_info *bi, int version) |
a4da2e3e DG |
370 | { |
371 | struct version_info *vi = NULL; | |
372 | int i; | |
373 | struct data blob = empty_data; | |
374 | struct data reservebuf = empty_data; | |
375 | struct data dtbuf = empty_data; | |
376 | struct data strbuf = empty_data; | |
377 | struct fdt_header fdt; | |
378 | int padlen = 0; | |
379 | ||
380 | for (i = 0; i < ARRAY_SIZE(version_table); i++) { | |
381 | if (version_table[i].version == version) | |
382 | vi = &version_table[i]; | |
383 | } | |
384 | if (!vi) | |
385 | die("Unknown device tree blob version %d\n", version); | |
386 | ||
387 | flatten_tree(bi->dt, &bin_emitter, &dtbuf, &strbuf, vi); | |
388 | bin_emit_cell(&dtbuf, FDT_END); | |
389 | ||
390 | reservebuf = flatten_reserve_list(bi->reservelist, vi); | |
391 | ||
392 | /* Make header */ | |
393 | make_fdt_header(&fdt, vi, reservebuf.len, dtbuf.len, strbuf.len, | |
ed95d745 | 394 | bi->boot_cpuid_phys); |
a4da2e3e DG |
395 | |
396 | /* | |
397 | * If the user asked for more space than is used, adjust the totalsize. | |
398 | */ | |
399 | if (minsize > 0) { | |
ed95d745 | 400 | padlen = minsize - fdt32_to_cpu(fdt.totalsize); |
a4da2e3e DG |
401 | if ((padlen < 0) && (quiet < 1)) |
402 | fprintf(stderr, | |
403 | "Warning: blob size %d >= minimum size %d\n", | |
ed95d745 | 404 | fdt32_to_cpu(fdt.totalsize), minsize); |
a4da2e3e DG |
405 | } |
406 | ||
407 | if (padsize > 0) | |
408 | padlen = padsize; | |
409 | ||
410 | if (padlen > 0) { | |
ed95d745 | 411 | int tsize = fdt32_to_cpu(fdt.totalsize); |
a4da2e3e | 412 | tsize += padlen; |
ed95d745 | 413 | fdt.totalsize = cpu_to_fdt32(tsize); |
a4da2e3e DG |
414 | } |
415 | ||
416 | /* | |
417 | * Assemble the blob: start with the header, add with alignment | |
418 | * the reserve buffer, add the reserve map terminating zeroes, | |
419 | * the device tree itself, and finally the strings. | |
420 | */ | |
ed95d745 | 421 | blob = data_append_data(blob, &fdt, vi->hdr_size); |
a4da2e3e DG |
422 | blob = data_append_align(blob, 8); |
423 | blob = data_merge(blob, reservebuf); | |
424 | blob = data_append_zeroes(blob, sizeof(struct fdt_reserve_entry)); | |
425 | blob = data_merge(blob, dtbuf); | |
426 | blob = data_merge(blob, strbuf); | |
427 | ||
428 | /* | |
429 | * If the user asked for more space than is used, pad out the blob. | |
430 | */ | |
431 | if (padlen > 0) | |
432 | blob = data_append_zeroes(blob, padlen); | |
433 | ||
658f29a5 JB |
434 | if (fwrite(blob.val, blob.len, 1, f) != 1) { |
435 | if (ferror(f)) | |
436 | die("Error writing device tree blob: %s\n", | |
437 | strerror(errno)); | |
438 | else | |
439 | die("Short write on device tree blob\n"); | |
440 | } | |
a4da2e3e DG |
441 | |
442 | /* | |
443 | * data_merge() frees the right-hand element so only the blob | |
444 | * remains to be freed. | |
445 | */ | |
446 | data_free(blob); | |
447 | } | |
448 | ||
449 | static void dump_stringtable_asm(FILE *f, struct data strbuf) | |
450 | { | |
451 | const char *p; | |
452 | int len; | |
453 | ||
454 | p = strbuf.val; | |
455 | ||
456 | while (p < (strbuf.val + strbuf.len)) { | |
457 | len = strlen(p); | |
458 | fprintf(f, "\t.string \"%s\"\n", p); | |
459 | p += len+1; | |
460 | } | |
461 | } | |
462 | ||
ed95d745 | 463 | void dt_to_asm(FILE *f, struct boot_info *bi, int version) |
a4da2e3e DG |
464 | { |
465 | struct version_info *vi = NULL; | |
466 | int i; | |
467 | struct data strbuf = empty_data; | |
468 | struct reserve_info *re; | |
469 | const char *symprefix = "dt"; | |
470 | ||
471 | for (i = 0; i < ARRAY_SIZE(version_table); i++) { | |
472 | if (version_table[i].version == version) | |
473 | vi = &version_table[i]; | |
474 | } | |
475 | if (!vi) | |
476 | die("Unknown device tree blob version %d\n", version); | |
477 | ||
478 | fprintf(f, "/* autogenerated by dtc, do not edit */\n\n"); | |
a4da2e3e DG |
479 | |
480 | emit_label(f, symprefix, "blob_start"); | |
481 | emit_label(f, symprefix, "header"); | |
658f29a5 JB |
482 | fprintf(f, "\t/* magic */\n"); |
483 | asm_emit_cell(f, FDT_MAGIC); | |
484 | fprintf(f, "\t/* totalsize */\n"); | |
485 | ASM_EMIT_BELONG(f, "_%s_blob_abs_end - _%s_blob_start", | |
486 | symprefix, symprefix); | |
487 | fprintf(f, "\t/* off_dt_struct */\n"); | |
488 | ASM_EMIT_BELONG(f, "_%s_struct_start - _%s_blob_start", | |
a4da2e3e | 489 | symprefix, symprefix); |
658f29a5 JB |
490 | fprintf(f, "\t/* off_dt_strings */\n"); |
491 | ASM_EMIT_BELONG(f, "_%s_strings_start - _%s_blob_start", | |
a4da2e3e | 492 | symprefix, symprefix); |
658f29a5 JB |
493 | fprintf(f, "\t/* off_mem_rsvmap */\n"); |
494 | ASM_EMIT_BELONG(f, "_%s_reserve_map - _%s_blob_start", | |
a4da2e3e | 495 | symprefix, symprefix); |
658f29a5 JB |
496 | fprintf(f, "\t/* version */\n"); |
497 | asm_emit_cell(f, vi->version); | |
498 | fprintf(f, "\t/* last_comp_version */\n"); | |
499 | asm_emit_cell(f, vi->last_comp_version); | |
500 | ||
501 | if (vi->flags & FTF_BOOTCPUID) { | |
502 | fprintf(f, "\t/* boot_cpuid_phys */\n"); | |
503 | asm_emit_cell(f, bi->boot_cpuid_phys); | |
504 | } | |
a4da2e3e | 505 | |
658f29a5 JB |
506 | if (vi->flags & FTF_STRTABSIZE) { |
507 | fprintf(f, "\t/* size_dt_strings */\n"); | |
508 | ASM_EMIT_BELONG(f, "_%s_strings_end - _%s_strings_start", | |
509 | symprefix, symprefix); | |
510 | } | |
a4da2e3e | 511 | |
658f29a5 JB |
512 | if (vi->flags & FTF_STRUCTSIZE) { |
513 | fprintf(f, "\t/* size_dt_struct */\n"); | |
514 | ASM_EMIT_BELONG(f, "_%s_struct_end - _%s_struct_start", | |
a4da2e3e | 515 | symprefix, symprefix); |
658f29a5 | 516 | } |
a4da2e3e DG |
517 | |
518 | /* | |
519 | * Reserve map entries. | |
520 | * Align the reserve map to a doubleword boundary. | |
521 | * Each entry is an (address, size) pair of u64 values. | |
522 | * Always supply a zero-sized temination entry. | |
523 | */ | |
524 | asm_emit_align(f, 8); | |
525 | emit_label(f, symprefix, "reserve_map"); | |
526 | ||
527 | fprintf(f, "/* Memory reserve map from source file */\n"); | |
528 | ||
529 | /* | |
530 | * Use .long on high and low halfs of u64s to avoid .quad | |
531 | * as it appears .quad isn't available in some assemblers. | |
532 | */ | |
533 | for (re = bi->reservelist; re; re = re->next) { | |
658f29a5 JB |
534 | struct label *l; |
535 | ||
536 | for_each_label(re->labels, l) { | |
537 | fprintf(f, "\t.globl\t%s\n", l->label); | |
538 | fprintf(f, "%s:\n", l->label); | |
a4da2e3e | 539 | } |
658f29a5 JB |
540 | ASM_EMIT_BELONG(f, "0x%08x", (unsigned int)(re->re.address >> 32)); |
541 | ASM_EMIT_BELONG(f, "0x%08x", | |
542 | (unsigned int)(re->re.address & 0xffffffff)); | |
543 | ASM_EMIT_BELONG(f, "0x%08x", (unsigned int)(re->re.size >> 32)); | |
544 | ASM_EMIT_BELONG(f, "0x%08x", (unsigned int)(re->re.size & 0xffffffff)); | |
a4da2e3e DG |
545 | } |
546 | for (i = 0; i < reservenum; i++) { | |
547 | fprintf(f, "\t.long\t0, 0\n\t.long\t0, 0\n"); | |
548 | } | |
549 | ||
550 | fprintf(f, "\t.long\t0, 0\n\t.long\t0, 0\n"); | |
551 | ||
552 | emit_label(f, symprefix, "struct_start"); | |
553 | flatten_tree(bi->dt, &asm_emitter, f, &strbuf, vi); | |
658f29a5 JB |
554 | |
555 | fprintf(f, "\t/* FDT_END */\n"); | |
556 | asm_emit_cell(f, FDT_END); | |
a4da2e3e DG |
557 | emit_label(f, symprefix, "struct_end"); |
558 | ||
559 | emit_label(f, symprefix, "strings_start"); | |
560 | dump_stringtable_asm(f, strbuf); | |
561 | emit_label(f, symprefix, "strings_end"); | |
562 | ||
563 | emit_label(f, symprefix, "blob_end"); | |
564 | ||
565 | /* | |
566 | * If the user asked for more space than is used, pad it out. | |
567 | */ | |
568 | if (minsize > 0) { | |
569 | fprintf(f, "\t.space\t%d - (_%s_blob_end - _%s_blob_start), 0\n", | |
570 | minsize, symprefix, symprefix); | |
571 | } | |
572 | if (padsize > 0) { | |
573 | fprintf(f, "\t.space\t%d, 0\n", padsize); | |
574 | } | |
575 | emit_label(f, symprefix, "blob_abs_end"); | |
576 | ||
577 | data_free(strbuf); | |
578 | } | |
579 | ||
580 | struct inbuf { | |
581 | char *base, *limit, *ptr; | |
582 | }; | |
583 | ||
584 | static void inbuf_init(struct inbuf *inb, void *base, void *limit) | |
585 | { | |
586 | inb->base = base; | |
587 | inb->limit = limit; | |
588 | inb->ptr = inb->base; | |
589 | } | |
590 | ||
591 | static void flat_read_chunk(struct inbuf *inb, void *p, int len) | |
592 | { | |
593 | if ((inb->ptr + len) > inb->limit) | |
594 | die("Premature end of data parsing flat device tree\n"); | |
595 | ||
596 | memcpy(p, inb->ptr, len); | |
597 | ||
598 | inb->ptr += len; | |
599 | } | |
600 | ||
ed95d745 | 601 | static uint32_t flat_read_word(struct inbuf *inb) |
a4da2e3e | 602 | { |
ed95d745 | 603 | uint32_t val; |
a4da2e3e DG |
604 | |
605 | assert(((inb->ptr - inb->base) % sizeof(val)) == 0); | |
606 | ||
607 | flat_read_chunk(inb, &val, sizeof(val)); | |
608 | ||
ed95d745 | 609 | return fdt32_to_cpu(val); |
a4da2e3e DG |
610 | } |
611 | ||
612 | static void flat_realign(struct inbuf *inb, int align) | |
613 | { | |
614 | int off = inb->ptr - inb->base; | |
615 | ||
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"); | |
619 | } | |
620 | ||
621 | static char *flat_read_string(struct inbuf *inb) | |
622 | { | |
623 | int len = 0; | |
624 | const char *p = inb->ptr; | |
625 | char *str; | |
626 | ||
627 | do { | |
628 | if (p >= inb->limit) | |
629 | die("Premature end of data parsing flat device tree\n"); | |
630 | len++; | |
631 | } while ((*p++) != '\0'); | |
632 | ||
658f29a5 | 633 | str = xstrdup(inb->ptr); |
a4da2e3e DG |
634 | |
635 | inb->ptr += len; | |
636 | ||
ed95d745 | 637 | flat_realign(inb, sizeof(uint32_t)); |
a4da2e3e DG |
638 | |
639 | return str; | |
640 | } | |
641 | ||
642 | static struct data flat_read_data(struct inbuf *inb, int len) | |
643 | { | |
644 | struct data d = empty_data; | |
645 | ||
646 | if (len == 0) | |
647 | return empty_data; | |
648 | ||
649 | d = data_grow_for(d, len); | |
650 | d.len = len; | |
651 | ||
652 | flat_read_chunk(inb, d.val, len); | |
653 | ||
ed95d745 | 654 | flat_realign(inb, sizeof(uint32_t)); |
a4da2e3e DG |
655 | |
656 | return d; | |
657 | } | |
658 | ||
659 | static char *flat_read_stringtable(struct inbuf *inb, int offset) | |
660 | { | |
661 | const char *p; | |
662 | ||
663 | p = inb->base + offset; | |
664 | while (1) { | |
665 | if (p >= inb->limit || p < inb->base) | |
666 | die("String offset %d overruns string table\n", | |
667 | offset); | |
668 | ||
669 | if (*p == '\0') | |
670 | break; | |
671 | ||
672 | p++; | |
673 | } | |
674 | ||
658f29a5 | 675 | return xstrdup(inb->base + offset); |
a4da2e3e DG |
676 | } |
677 | ||
678 | static struct property *flat_read_property(struct inbuf *dtbuf, | |
679 | struct inbuf *strbuf, int flags) | |
680 | { | |
ed95d745 | 681 | uint32_t proplen, stroff; |
a4da2e3e DG |
682 | char *name; |
683 | struct data val; | |
684 | ||
685 | proplen = flat_read_word(dtbuf); | |
686 | stroff = flat_read_word(dtbuf); | |
687 | ||
688 | name = flat_read_stringtable(strbuf, stroff); | |
689 | ||
690 | if ((flags & FTF_VARALIGN) && (proplen >= 8)) | |
691 | flat_realign(dtbuf, 8); | |
692 | ||
693 | val = flat_read_data(dtbuf, proplen); | |
694 | ||
658f29a5 | 695 | return build_property(name, val); |
a4da2e3e DG |
696 | } |
697 | ||
698 | ||
699 | static struct reserve_info *flat_read_mem_reserve(struct inbuf *inb) | |
700 | { | |
701 | struct reserve_info *reservelist = NULL; | |
702 | struct reserve_info *new; | |
a4da2e3e DG |
703 | struct fdt_reserve_entry re; |
704 | ||
705 | /* | |
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. | |
708 | * | |
709 | * First pass, count entries. | |
710 | */ | |
a4da2e3e DG |
711 | while (1) { |
712 | flat_read_chunk(inb, &re, sizeof(re)); | |
ed95d745 DG |
713 | re.address = fdt64_to_cpu(re.address); |
714 | re.size = fdt64_to_cpu(re.size); | |
a4da2e3e DG |
715 | if (re.size == 0) |
716 | break; | |
717 | ||
658f29a5 | 718 | new = build_reserve_entry(re.address, re.size); |
a4da2e3e DG |
719 | reservelist = add_reserve_entry(reservelist, new); |
720 | } | |
721 | ||
722 | return reservelist; | |
723 | } | |
724 | ||
725 | ||
726 | static char *nodename_from_path(const char *ppath, const char *cpath) | |
727 | { | |
a4da2e3e DG |
728 | int plen; |
729 | ||
ed95d745 | 730 | plen = strlen(ppath); |
a4da2e3e | 731 | |
ed95d745 DG |
732 | if (!strneq(ppath, cpath, plen)) |
733 | die("Path \"%s\" is not valid as a child of \"%s\"\n", | |
734 | cpath, ppath); | |
a4da2e3e | 735 | |
ed95d745 DG |
736 | /* root node is a special case */ |
737 | if (!streq(ppath, "/")) | |
738 | plen++; | |
a4da2e3e | 739 | |
658f29a5 | 740 | return xstrdup(cpath + plen); |
a4da2e3e DG |
741 | } |
742 | ||
743 | static struct node *unflatten_tree(struct inbuf *dtbuf, | |
744 | struct inbuf *strbuf, | |
ed95d745 | 745 | const char *parent_flatname, int flags) |
a4da2e3e DG |
746 | { |
747 | struct node *node; | |
ed95d745 DG |
748 | char *flatname; |
749 | uint32_t val; | |
a4da2e3e DG |
750 | |
751 | node = build_node(NULL, NULL); | |
752 | ||
ed95d745 | 753 | flatname = flat_read_string(dtbuf); |
a4da2e3e | 754 | |
ed95d745 DG |
755 | if (flags & FTF_FULLPATH) |
756 | node->name = nodename_from_path(parent_flatname, flatname); | |
757 | else | |
758 | node->name = flatname; | |
a4da2e3e DG |
759 | |
760 | do { | |
761 | struct property *prop; | |
762 | struct node *child; | |
763 | ||
764 | val = flat_read_word(dtbuf); | |
765 | switch (val) { | |
766 | case FDT_PROP: | |
767 | if (node->children) | |
768 | fprintf(stderr, "Warning: Flat tree input has " | |
769 | "subnodes preceding a property.\n"); | |
770 | prop = flat_read_property(dtbuf, strbuf, flags); | |
771 | add_property(node, prop); | |
772 | break; | |
773 | ||
774 | case FDT_BEGIN_NODE: | |
ed95d745 | 775 | child = unflatten_tree(dtbuf,strbuf, flatname, flags); |
a4da2e3e DG |
776 | add_child(node, child); |
777 | break; | |
778 | ||
779 | case FDT_END_NODE: | |
780 | break; | |
781 | ||
782 | case FDT_END: | |
783 | die("Premature FDT_END in device tree blob\n"); | |
784 | break; | |
785 | ||
786 | case FDT_NOP: | |
787 | if (!(flags & FTF_NOPS)) | |
788 | fprintf(stderr, "Warning: NOP tag found in flat tree" | |
789 | " version <16\n"); | |
790 | ||
791 | /* Ignore */ | |
792 | break; | |
793 | ||
794 | default: | |
795 | die("Invalid opcode word %08x in device tree blob\n", | |
796 | val); | |
797 | } | |
798 | } while (val != FDT_END_NODE); | |
799 | ||
800 | return node; | |
801 | } | |
802 | ||
803 | ||
ed95d745 | 804 | struct boot_info *dt_from_blob(const char *fname) |
a4da2e3e | 805 | { |
658f29a5 | 806 | FILE *f; |
ed95d745 DG |
807 | uint32_t magic, totalsize, version, size_dt, boot_cpuid_phys; |
808 | uint32_t off_dt, off_str, off_mem_rsvmap; | |
a4da2e3e DG |
809 | int rc; |
810 | char *blob; | |
811 | struct fdt_header *fdt; | |
812 | char *p; | |
813 | struct inbuf dtbuf, strbuf; | |
814 | struct inbuf memresvbuf; | |
815 | int sizeleft; | |
816 | struct reserve_info *reservelist; | |
817 | struct node *tree; | |
ed95d745 | 818 | uint32_t val; |
a4da2e3e DG |
819 | int flags = 0; |
820 | ||
658f29a5 | 821 | f = srcfile_relative_open(fname, NULL); |
ed95d745 | 822 | |
658f29a5 JB |
823 | rc = fread(&magic, sizeof(magic), 1, f); |
824 | if (ferror(f)) | |
a4da2e3e DG |
825 | die("Error reading DT blob magic number: %s\n", |
826 | strerror(errno)); | |
827 | if (rc < 1) { | |
658f29a5 | 828 | if (feof(f)) |
a4da2e3e DG |
829 | die("EOF reading DT blob magic number\n"); |
830 | else | |
831 | die("Mysterious short read reading magic number\n"); | |
832 | } | |
833 | ||
ed95d745 | 834 | magic = fdt32_to_cpu(magic); |
a4da2e3e DG |
835 | if (magic != FDT_MAGIC) |
836 | die("Blob has incorrect magic number\n"); | |
837 | ||
658f29a5 JB |
838 | rc = fread(&totalsize, sizeof(totalsize), 1, f); |
839 | if (ferror(f)) | |
a4da2e3e DG |
840 | die("Error reading DT blob size: %s\n", strerror(errno)); |
841 | if (rc < 1) { | |
658f29a5 | 842 | if (feof(f)) |
a4da2e3e DG |
843 | die("EOF reading DT blob size\n"); |
844 | else | |
845 | die("Mysterious short read reading blob size\n"); | |
846 | } | |
847 | ||
ed95d745 | 848 | totalsize = fdt32_to_cpu(totalsize); |
a4da2e3e DG |
849 | if (totalsize < FDT_V1_SIZE) |
850 | die("DT blob size (%d) is too small\n", totalsize); | |
851 | ||
852 | blob = xmalloc(totalsize); | |
853 | ||
854 | fdt = (struct fdt_header *)blob; | |
ed95d745 DG |
855 | fdt->magic = cpu_to_fdt32(magic); |
856 | fdt->totalsize = cpu_to_fdt32(totalsize); | |
a4da2e3e DG |
857 | |
858 | sizeleft = totalsize - sizeof(magic) - sizeof(totalsize); | |
859 | p = blob + sizeof(magic) + sizeof(totalsize); | |
860 | ||
861 | while (sizeleft) { | |
658f29a5 | 862 | if (feof(f)) |
a4da2e3e DG |
863 | die("EOF before reading %d bytes of DT blob\n", |
864 | totalsize); | |
865 | ||
658f29a5 JB |
866 | rc = fread(p, 1, sizeleft, f); |
867 | if (ferror(f)) | |
a4da2e3e DG |
868 | die("Error reading DT blob: %s\n", |
869 | strerror(errno)); | |
870 | ||
871 | sizeleft -= rc; | |
872 | p += rc; | |
873 | } | |
874 | ||
ed95d745 DG |
875 | off_dt = fdt32_to_cpu(fdt->off_dt_struct); |
876 | off_str = fdt32_to_cpu(fdt->off_dt_strings); | |
877 | off_mem_rsvmap = fdt32_to_cpu(fdt->off_mem_rsvmap); | |
878 | version = fdt32_to_cpu(fdt->version); | |
879 | boot_cpuid_phys = fdt32_to_cpu(fdt->boot_cpuid_phys); | |
a4da2e3e DG |
880 | |
881 | if (off_mem_rsvmap >= totalsize) | |
882 | die("Mem Reserve structure offset exceeds total size\n"); | |
883 | ||
884 | if (off_dt >= totalsize) | |
885 | die("DT structure offset exceeds total size\n"); | |
886 | ||
887 | if (off_str > totalsize) | |
888 | die("String table offset exceeds total size\n"); | |
889 | ||
a4da2e3e | 890 | if (version >= 3) { |
ed95d745 | 891 | uint32_t size_str = fdt32_to_cpu(fdt->size_dt_strings); |
a4da2e3e DG |
892 | if (off_str+size_str > totalsize) |
893 | die("String table extends past total size\n"); | |
ed95d745 DG |
894 | inbuf_init(&strbuf, blob + off_str, blob + off_str + size_str); |
895 | } else { | |
896 | inbuf_init(&strbuf, blob + off_str, blob + totalsize); | |
a4da2e3e DG |
897 | } |
898 | ||
899 | if (version >= 17) { | |
ed95d745 | 900 | size_dt = fdt32_to_cpu(fdt->size_dt_struct); |
a4da2e3e DG |
901 | if (off_dt+size_dt > totalsize) |
902 | die("Structure block extends past total size\n"); | |
903 | } | |
904 | ||
905 | if (version < 16) { | |
906 | flags |= FTF_FULLPATH | FTF_NAMEPROPS | FTF_VARALIGN; | |
907 | } else { | |
908 | flags |= FTF_NOPS; | |
909 | } | |
910 | ||
911 | inbuf_init(&memresvbuf, | |
912 | blob + off_mem_rsvmap, blob + totalsize); | |
913 | inbuf_init(&dtbuf, blob + off_dt, blob + totalsize); | |
a4da2e3e DG |
914 | |
915 | reservelist = flat_read_mem_reserve(&memresvbuf); | |
916 | ||
917 | val = flat_read_word(&dtbuf); | |
918 | ||
919 | if (val != FDT_BEGIN_NODE) | |
920 | die("Device tree blob doesn't begin with FDT_BEGIN_NODE (begins with 0x%08x)\n", val); | |
921 | ||
922 | tree = unflatten_tree(&dtbuf, &strbuf, "", flags); | |
923 | ||
924 | val = flat_read_word(&dtbuf); | |
925 | if (val != FDT_END) | |
926 | die("Device tree blob doesn't end with FDT_END\n"); | |
927 | ||
928 | free(blob); | |
929 | ||
658f29a5 | 930 | fclose(f); |
ed95d745 DG |
931 | |
932 | return build_boot_info(reservelist, tree, boot_cpuid_phys); | |
a4da2e3e | 933 | } |