Commit | Line | Data |
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12869ecd | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
a4da2e3e DG |
2 | /* |
3 | * (C) Copyright David Gibson <dwg@au1.ibm.com>, IBM Corporation. 2005. | |
a4da2e3e DG |
4 | */ |
5 | ||
6 | #include "dtc.h" | |
ed95d745 | 7 | #include "srcpos.h" |
a4da2e3e DG |
8 | |
9 | #define FTF_FULLPATH 0x1 | |
10 | #define FTF_VARALIGN 0x2 | |
11 | #define FTF_NAMEPROPS 0x4 | |
12 | #define FTF_BOOTCPUID 0x8 | |
13 | #define FTF_STRTABSIZE 0x10 | |
14 | #define FTF_STRUCTSIZE 0x20 | |
15 | #define FTF_NOPS 0x40 | |
16 | ||
17 | static struct version_info { | |
18 | int version; | |
19 | int last_comp_version; | |
20 | int hdr_size; | |
21 | int flags; | |
22 | } version_table[] = { | |
23 | {1, 1, FDT_V1_SIZE, | |
24 | FTF_FULLPATH|FTF_VARALIGN|FTF_NAMEPROPS}, | |
25 | {2, 1, FDT_V2_SIZE, | |
26 | FTF_FULLPATH|FTF_VARALIGN|FTF_NAMEPROPS|FTF_BOOTCPUID}, | |
27 | {3, 1, FDT_V3_SIZE, | |
28 | FTF_FULLPATH|FTF_VARALIGN|FTF_NAMEPROPS|FTF_BOOTCPUID|FTF_STRTABSIZE}, | |
29 | {16, 16, FDT_V3_SIZE, | |
30 | FTF_BOOTCPUID|FTF_STRTABSIZE|FTF_NOPS}, | |
31 | {17, 16, FDT_V17_SIZE, | |
32 | FTF_BOOTCPUID|FTF_STRTABSIZE|FTF_STRUCTSIZE|FTF_NOPS}, | |
33 | }; | |
34 | ||
35 | struct emitter { | |
36 | void (*cell)(void *, cell_t); | |
89d12310 | 37 | void (*string)(void *, const char *, int); |
a4da2e3e DG |
38 | void (*align)(void *, int); |
39 | void (*data)(void *, struct data); | |
658f29a5 JB |
40 | void (*beginnode)(void *, struct label *labels); |
41 | void (*endnode)(void *, struct label *labels); | |
42 | void (*property)(void *, struct label *labels); | |
a4da2e3e DG |
43 | }; |
44 | ||
45 | static void bin_emit_cell(void *e, cell_t val) | |
46 | { | |
47 | struct data *dtbuf = e; | |
48 | ||
49 | *dtbuf = data_append_cell(*dtbuf, val); | |
50 | } | |
51 | ||
89d12310 | 52 | static void bin_emit_string(void *e, const char *str, int len) |
a4da2e3e DG |
53 | { |
54 | struct data *dtbuf = e; | |
55 | ||
56 | if (len == 0) | |
57 | len = strlen(str); | |
58 | ||
59 | *dtbuf = data_append_data(*dtbuf, str, len); | |
60 | *dtbuf = data_append_byte(*dtbuf, '\0'); | |
61 | } | |
62 | ||
63 | static void bin_emit_align(void *e, int a) | |
64 | { | |
65 | struct data *dtbuf = e; | |
66 | ||
67 | *dtbuf = data_append_align(*dtbuf, a); | |
68 | } | |
69 | ||
70 | static void bin_emit_data(void *e, struct data d) | |
71 | { | |
72 | struct data *dtbuf = e; | |
73 | ||
74 | *dtbuf = data_append_data(*dtbuf, d.val, d.len); | |
75 | } | |
76 | ||
658f29a5 | 77 | static void bin_emit_beginnode(void *e, struct label *labels) |
a4da2e3e DG |
78 | { |
79 | bin_emit_cell(e, FDT_BEGIN_NODE); | |
80 | } | |
81 | ||
658f29a5 | 82 | static void bin_emit_endnode(void *e, struct label *labels) |
a4da2e3e DG |
83 | { |
84 | bin_emit_cell(e, FDT_END_NODE); | |
85 | } | |
86 | ||
658f29a5 | 87 | static void bin_emit_property(void *e, struct label *labels) |
a4da2e3e DG |
88 | { |
89 | bin_emit_cell(e, FDT_PROP); | |
90 | } | |
91 | ||
92 | static struct emitter bin_emitter = { | |
93 | .cell = bin_emit_cell, | |
94 | .string = bin_emit_string, | |
95 | .align = bin_emit_align, | |
96 | .data = bin_emit_data, | |
97 | .beginnode = bin_emit_beginnode, | |
98 | .endnode = bin_emit_endnode, | |
99 | .property = bin_emit_property, | |
100 | }; | |
101 | ||
102 | static void emit_label(FILE *f, const char *prefix, const char *label) | |
103 | { | |
104 | fprintf(f, "\t.globl\t%s_%s\n", prefix, label); | |
105 | fprintf(f, "%s_%s:\n", prefix, label); | |
106 | fprintf(f, "_%s_%s:\n", prefix, label); | |
107 | } | |
108 | ||
109 | static void emit_offset_label(FILE *f, const char *label, int offset) | |
110 | { | |
111 | fprintf(f, "\t.globl\t%s\n", label); | |
112 | fprintf(f, "%s\t= . + %d\n", label, offset); | |
113 | } | |
114 | ||
658f29a5 JB |
115 | #define ASM_EMIT_BELONG(f, fmt, ...) \ |
116 | { \ | |
117 | fprintf((f), "\t.byte\t((" fmt ") >> 24) & 0xff\n", __VA_ARGS__); \ | |
118 | fprintf((f), "\t.byte\t((" fmt ") >> 16) & 0xff\n", __VA_ARGS__); \ | |
119 | fprintf((f), "\t.byte\t((" fmt ") >> 8) & 0xff\n", __VA_ARGS__); \ | |
120 | fprintf((f), "\t.byte\t(" fmt ") & 0xff\n", __VA_ARGS__); \ | |
121 | } | |
122 | ||
a4da2e3e DG |
123 | static void asm_emit_cell(void *e, cell_t val) |
124 | { | |
125 | FILE *f = e; | |
126 | ||
a77725a9 RH |
127 | fprintf(f, "\t.byte\t0x%02x\n" "\t.byte\t0x%02x\n" |
128 | "\t.byte\t0x%02x\n" "\t.byte\t0x%02x\n", | |
658f29a5 JB |
129 | (val >> 24) & 0xff, (val >> 16) & 0xff, |
130 | (val >> 8) & 0xff, val & 0xff); | |
a4da2e3e DG |
131 | } |
132 | ||
89d12310 | 133 | static void asm_emit_string(void *e, const char *str, int len) |
a4da2e3e DG |
134 | { |
135 | FILE *f = e; | |
a4da2e3e | 136 | |
89d12310 | 137 | if (len != 0) |
a77725a9 | 138 | fprintf(f, "\t.asciz\t\"%.*s\"\n", len, str); |
89d12310 | 139 | else |
a77725a9 | 140 | fprintf(f, "\t.asciz\t\"%s\"\n", str); |
a4da2e3e DG |
141 | } |
142 | ||
143 | static void asm_emit_align(void *e, int a) | |
144 | { | |
145 | FILE *f = e; | |
146 | ||
658f29a5 | 147 | fprintf(f, "\t.balign\t%d, 0\n", a); |
a4da2e3e DG |
148 | } |
149 | ||
150 | static void asm_emit_data(void *e, struct data d) | |
151 | { | |
152 | FILE *f = e; | |
79edff12 | 153 | unsigned int off = 0; |
ed95d745 | 154 | struct marker *m = d.markers; |
a4da2e3e | 155 | |
ed95d745 DG |
156 | for_each_marker_of_type(m, LABEL) |
157 | emit_offset_label(f, m->ref, m->offset); | |
a4da2e3e | 158 | |
ed95d745 | 159 | while ((d.len - off) >= sizeof(uint32_t)) { |
3eb619b2 | 160 | asm_emit_cell(e, dtb_ld32(d.val + off)); |
ed95d745 | 161 | off += sizeof(uint32_t); |
a4da2e3e DG |
162 | } |
163 | ||
ed95d745 | 164 | while ((d.len - off) >= 1) { |
a4da2e3e DG |
165 | fprintf(f, "\t.byte\t0x%hhx\n", d.val[off]); |
166 | off += 1; | |
167 | } | |
168 | ||
169 | assert(off == d.len); | |
170 | } | |
171 | ||
658f29a5 | 172 | static void asm_emit_beginnode(void *e, struct label *labels) |
a4da2e3e DG |
173 | { |
174 | FILE *f = e; | |
658f29a5 | 175 | struct label *l; |
a4da2e3e | 176 | |
658f29a5 JB |
177 | for_each_label(labels, l) { |
178 | fprintf(f, "\t.globl\t%s\n", l->label); | |
179 | fprintf(f, "%s:\n", l->label); | |
a4da2e3e | 180 | } |
658f29a5 JB |
181 | fprintf(f, "\t/* FDT_BEGIN_NODE */\n"); |
182 | asm_emit_cell(e, FDT_BEGIN_NODE); | |
a4da2e3e DG |
183 | } |
184 | ||
658f29a5 | 185 | static void asm_emit_endnode(void *e, struct label *labels) |
a4da2e3e DG |
186 | { |
187 | FILE *f = e; | |
658f29a5 | 188 | struct label *l; |
a4da2e3e | 189 | |
658f29a5 JB |
190 | fprintf(f, "\t/* FDT_END_NODE */\n"); |
191 | asm_emit_cell(e, FDT_END_NODE); | |
192 | for_each_label(labels, l) { | |
193 | fprintf(f, "\t.globl\t%s_end\n", l->label); | |
194 | fprintf(f, "%s_end:\n", l->label); | |
a4da2e3e DG |
195 | } |
196 | } | |
197 | ||
658f29a5 | 198 | static void asm_emit_property(void *e, struct label *labels) |
a4da2e3e DG |
199 | { |
200 | FILE *f = e; | |
658f29a5 | 201 | struct label *l; |
a4da2e3e | 202 | |
658f29a5 JB |
203 | for_each_label(labels, l) { |
204 | fprintf(f, "\t.globl\t%s\n", l->label); | |
205 | fprintf(f, "%s:\n", l->label); | |
a4da2e3e | 206 | } |
658f29a5 JB |
207 | fprintf(f, "\t/* FDT_PROP */\n"); |
208 | asm_emit_cell(e, FDT_PROP); | |
a4da2e3e DG |
209 | } |
210 | ||
211 | static struct emitter asm_emitter = { | |
212 | .cell = asm_emit_cell, | |
213 | .string = asm_emit_string, | |
214 | .align = asm_emit_align, | |
215 | .data = asm_emit_data, | |
216 | .beginnode = asm_emit_beginnode, | |
217 | .endnode = asm_emit_endnode, | |
218 | .property = asm_emit_property, | |
219 | }; | |
220 | ||
221 | static int stringtable_insert(struct data *d, const char *str) | |
222 | { | |
79edff12 | 223 | unsigned int i; |
a4da2e3e DG |
224 | |
225 | /* FIXME: do this more efficiently? */ | |
226 | ||
227 | for (i = 0; i < d->len; i++) { | |
228 | if (streq(str, d->val + i)) | |
229 | return i; | |
230 | } | |
231 | ||
232 | *d = data_append_data(*d, str, strlen(str)+1); | |
233 | return i; | |
234 | } | |
235 | ||
236 | static void flatten_tree(struct node *tree, struct emitter *emit, | |
237 | void *etarget, struct data *strbuf, | |
238 | struct version_info *vi) | |
239 | { | |
240 | struct property *prop; | |
241 | struct node *child; | |
47605971 | 242 | bool seen_name_prop = false; |
a4da2e3e | 243 | |
cd296721 SW |
244 | if (tree->deleted) |
245 | return; | |
246 | ||
658f29a5 | 247 | emit->beginnode(etarget, tree->labels); |
a4da2e3e DG |
248 | |
249 | if (vi->flags & FTF_FULLPATH) | |
250 | emit->string(etarget, tree->fullpath, 0); | |
251 | else | |
252 | emit->string(etarget, tree->name, 0); | |
253 | ||
254 | emit->align(etarget, sizeof(cell_t)); | |
255 | ||
256 | for_each_property(tree, prop) { | |
257 | int nameoff; | |
258 | ||
259 | if (streq(prop->name, "name")) | |
47605971 | 260 | seen_name_prop = true; |
a4da2e3e DG |
261 | |
262 | nameoff = stringtable_insert(strbuf, prop->name); | |
263 | ||
658f29a5 | 264 | emit->property(etarget, prop->labels); |
a4da2e3e DG |
265 | emit->cell(etarget, prop->val.len); |
266 | emit->cell(etarget, nameoff); | |
267 | ||
268 | if ((vi->flags & FTF_VARALIGN) && (prop->val.len >= 8)) | |
269 | emit->align(etarget, 8); | |
270 | ||
271 | emit->data(etarget, prop->val); | |
272 | emit->align(etarget, sizeof(cell_t)); | |
273 | } | |
274 | ||
275 | if ((vi->flags & FTF_NAMEPROPS) && !seen_name_prop) { | |
276 | emit->property(etarget, NULL); | |
277 | emit->cell(etarget, tree->basenamelen+1); | |
278 | emit->cell(etarget, stringtable_insert(strbuf, "name")); | |
279 | ||
280 | if ((vi->flags & FTF_VARALIGN) && ((tree->basenamelen+1) >= 8)) | |
281 | emit->align(etarget, 8); | |
282 | ||
283 | emit->string(etarget, tree->name, tree->basenamelen); | |
284 | emit->align(etarget, sizeof(cell_t)); | |
285 | } | |
286 | ||
287 | for_each_child(tree, child) { | |
288 | flatten_tree(child, emit, etarget, strbuf, vi); | |
289 | } | |
290 | ||
658f29a5 | 291 | emit->endnode(etarget, tree->labels); |
a4da2e3e DG |
292 | } |
293 | ||
294 | static struct data flatten_reserve_list(struct reserve_info *reservelist, | |
295 | struct version_info *vi) | |
296 | { | |
297 | struct reserve_info *re; | |
298 | struct data d = empty_data; | |
a77725a9 | 299 | unsigned int j; |
a4da2e3e DG |
300 | |
301 | for (re = reservelist; re; re = re->next) { | |
89d12310 | 302 | d = data_append_re(d, re->address, re->size); |
a4da2e3e DG |
303 | } |
304 | /* | |
305 | * Add additional reserved slots if the user asked for them. | |
306 | */ | |
307 | for (j = 0; j < reservenum; j++) { | |
89d12310 | 308 | d = data_append_re(d, 0, 0); |
a4da2e3e DG |
309 | } |
310 | ||
311 | return d; | |
312 | } | |
313 | ||
314 | static void make_fdt_header(struct fdt_header *fdt, | |
315 | struct version_info *vi, | |
316 | int reservesize, int dtsize, int strsize, | |
317 | int boot_cpuid_phys) | |
318 | { | |
319 | int reserve_off; | |
320 | ||
321 | reservesize += sizeof(struct fdt_reserve_entry); | |
322 | ||
323 | memset(fdt, 0xff, sizeof(*fdt)); | |
324 | ||
ed95d745 DG |
325 | fdt->magic = cpu_to_fdt32(FDT_MAGIC); |
326 | fdt->version = cpu_to_fdt32(vi->version); | |
327 | fdt->last_comp_version = cpu_to_fdt32(vi->last_comp_version); | |
a4da2e3e DG |
328 | |
329 | /* Reserve map should be doubleword aligned */ | |
330 | reserve_off = ALIGN(vi->hdr_size, 8); | |
331 | ||
ed95d745 DG |
332 | fdt->off_mem_rsvmap = cpu_to_fdt32(reserve_off); |
333 | fdt->off_dt_struct = cpu_to_fdt32(reserve_off + reservesize); | |
334 | fdt->off_dt_strings = cpu_to_fdt32(reserve_off + reservesize | |
a4da2e3e | 335 | + dtsize); |
ed95d745 | 336 | fdt->totalsize = cpu_to_fdt32(reserve_off + reservesize + dtsize + strsize); |
a4da2e3e DG |
337 | |
338 | if (vi->flags & FTF_BOOTCPUID) | |
ed95d745 | 339 | fdt->boot_cpuid_phys = cpu_to_fdt32(boot_cpuid_phys); |
a4da2e3e | 340 | if (vi->flags & FTF_STRTABSIZE) |
ed95d745 | 341 | fdt->size_dt_strings = cpu_to_fdt32(strsize); |
a4da2e3e | 342 | if (vi->flags & FTF_STRUCTSIZE) |
ed95d745 | 343 | fdt->size_dt_struct = cpu_to_fdt32(dtsize); |
a4da2e3e DG |
344 | } |
345 | ||
6f05afcb | 346 | void dt_to_blob(FILE *f, struct dt_info *dti, int version) |
a4da2e3e DG |
347 | { |
348 | struct version_info *vi = NULL; | |
79edff12 | 349 | unsigned int i; |
a4da2e3e DG |
350 | struct data blob = empty_data; |
351 | struct data reservebuf = empty_data; | |
352 | struct data dtbuf = empty_data; | |
353 | struct data strbuf = empty_data; | |
354 | struct fdt_header fdt; | |
355 | int padlen = 0; | |
356 | ||
357 | for (i = 0; i < ARRAY_SIZE(version_table); i++) { | |
358 | if (version_table[i].version == version) | |
359 | vi = &version_table[i]; | |
360 | } | |
361 | if (!vi) | |
362 | die("Unknown device tree blob version %d\n", version); | |
363 | ||
6f05afcb | 364 | flatten_tree(dti->dt, &bin_emitter, &dtbuf, &strbuf, vi); |
a4da2e3e DG |
365 | bin_emit_cell(&dtbuf, FDT_END); |
366 | ||
6f05afcb | 367 | reservebuf = flatten_reserve_list(dti->reservelist, vi); |
a4da2e3e DG |
368 | |
369 | /* Make header */ | |
370 | make_fdt_header(&fdt, vi, reservebuf.len, dtbuf.len, strbuf.len, | |
6f05afcb | 371 | dti->boot_cpuid_phys); |
a4da2e3e DG |
372 | |
373 | /* | |
374 | * If the user asked for more space than is used, adjust the totalsize. | |
375 | */ | |
376 | if (minsize > 0) { | |
ed95d745 | 377 | padlen = minsize - fdt32_to_cpu(fdt.totalsize); |
6f05afcb RH |
378 | if (padlen < 0) { |
379 | padlen = 0; | |
380 | if (quiet < 1) | |
381 | fprintf(stderr, | |
f858927f | 382 | "Warning: blob size %"PRIu32" >= minimum size %d\n", |
6f05afcb RH |
383 | fdt32_to_cpu(fdt.totalsize), minsize); |
384 | } | |
a4da2e3e DG |
385 | } |
386 | ||
387 | if (padsize > 0) | |
388 | padlen = padsize; | |
389 | ||
6f05afcb RH |
390 | if (alignsize > 0) |
391 | padlen = ALIGN(fdt32_to_cpu(fdt.totalsize) + padlen, alignsize) | |
392 | - fdt32_to_cpu(fdt.totalsize); | |
393 | ||
a4da2e3e | 394 | if (padlen > 0) { |
ed95d745 | 395 | int tsize = fdt32_to_cpu(fdt.totalsize); |
a4da2e3e | 396 | tsize += padlen; |
ed95d745 | 397 | fdt.totalsize = cpu_to_fdt32(tsize); |
a4da2e3e DG |
398 | } |
399 | ||
400 | /* | |
401 | * Assemble the blob: start with the header, add with alignment | |
402 | * the reserve buffer, add the reserve map terminating zeroes, | |
403 | * the device tree itself, and finally the strings. | |
404 | */ | |
ed95d745 | 405 | blob = data_append_data(blob, &fdt, vi->hdr_size); |
a4da2e3e DG |
406 | blob = data_append_align(blob, 8); |
407 | blob = data_merge(blob, reservebuf); | |
408 | blob = data_append_zeroes(blob, sizeof(struct fdt_reserve_entry)); | |
409 | blob = data_merge(blob, dtbuf); | |
410 | blob = data_merge(blob, strbuf); | |
411 | ||
412 | /* | |
413 | * If the user asked for more space than is used, pad out the blob. | |
414 | */ | |
415 | if (padlen > 0) | |
416 | blob = data_append_zeroes(blob, padlen); | |
417 | ||
658f29a5 JB |
418 | if (fwrite(blob.val, blob.len, 1, f) != 1) { |
419 | if (ferror(f)) | |
420 | die("Error writing device tree blob: %s\n", | |
421 | strerror(errno)); | |
422 | else | |
423 | die("Short write on device tree blob\n"); | |
424 | } | |
a4da2e3e DG |
425 | |
426 | /* | |
427 | * data_merge() frees the right-hand element so only the blob | |
428 | * remains to be freed. | |
429 | */ | |
430 | data_free(blob); | |
431 | } | |
432 | ||
433 | static void dump_stringtable_asm(FILE *f, struct data strbuf) | |
434 | { | |
435 | const char *p; | |
436 | int len; | |
437 | ||
438 | p = strbuf.val; | |
439 | ||
440 | while (p < (strbuf.val + strbuf.len)) { | |
441 | len = strlen(p); | |
a77725a9 | 442 | fprintf(f, "\t.asciz \"%s\"\n", p); |
a4da2e3e DG |
443 | p += len+1; |
444 | } | |
445 | } | |
446 | ||
6f05afcb | 447 | void dt_to_asm(FILE *f, struct dt_info *dti, int version) |
a4da2e3e DG |
448 | { |
449 | struct version_info *vi = NULL; | |
79edff12 | 450 | unsigned int i; |
a4da2e3e DG |
451 | struct data strbuf = empty_data; |
452 | struct reserve_info *re; | |
453 | const char *symprefix = "dt"; | |
454 | ||
455 | for (i = 0; i < ARRAY_SIZE(version_table); i++) { | |
456 | if (version_table[i].version == version) | |
457 | vi = &version_table[i]; | |
458 | } | |
459 | if (!vi) | |
460 | die("Unknown device tree blob version %d\n", version); | |
461 | ||
462 | fprintf(f, "/* autogenerated by dtc, do not edit */\n\n"); | |
a4da2e3e DG |
463 | |
464 | emit_label(f, symprefix, "blob_start"); | |
465 | emit_label(f, symprefix, "header"); | |
658f29a5 JB |
466 | fprintf(f, "\t/* magic */\n"); |
467 | asm_emit_cell(f, FDT_MAGIC); | |
468 | fprintf(f, "\t/* totalsize */\n"); | |
469 | ASM_EMIT_BELONG(f, "_%s_blob_abs_end - _%s_blob_start", | |
470 | symprefix, symprefix); | |
471 | fprintf(f, "\t/* off_dt_struct */\n"); | |
472 | ASM_EMIT_BELONG(f, "_%s_struct_start - _%s_blob_start", | |
a4da2e3e | 473 | symprefix, symprefix); |
658f29a5 JB |
474 | fprintf(f, "\t/* off_dt_strings */\n"); |
475 | ASM_EMIT_BELONG(f, "_%s_strings_start - _%s_blob_start", | |
a4da2e3e | 476 | symprefix, symprefix); |
658f29a5 JB |
477 | fprintf(f, "\t/* off_mem_rsvmap */\n"); |
478 | ASM_EMIT_BELONG(f, "_%s_reserve_map - _%s_blob_start", | |
a4da2e3e | 479 | symprefix, symprefix); |
658f29a5 JB |
480 | fprintf(f, "\t/* version */\n"); |
481 | asm_emit_cell(f, vi->version); | |
482 | fprintf(f, "\t/* last_comp_version */\n"); | |
483 | asm_emit_cell(f, vi->last_comp_version); | |
484 | ||
485 | if (vi->flags & FTF_BOOTCPUID) { | |
486 | fprintf(f, "\t/* boot_cpuid_phys */\n"); | |
6f05afcb | 487 | asm_emit_cell(f, dti->boot_cpuid_phys); |
658f29a5 | 488 | } |
a4da2e3e | 489 | |
658f29a5 JB |
490 | if (vi->flags & FTF_STRTABSIZE) { |
491 | fprintf(f, "\t/* size_dt_strings */\n"); | |
492 | ASM_EMIT_BELONG(f, "_%s_strings_end - _%s_strings_start", | |
493 | symprefix, symprefix); | |
494 | } | |
a4da2e3e | 495 | |
658f29a5 JB |
496 | if (vi->flags & FTF_STRUCTSIZE) { |
497 | fprintf(f, "\t/* size_dt_struct */\n"); | |
498 | ASM_EMIT_BELONG(f, "_%s_struct_end - _%s_struct_start", | |
a4da2e3e | 499 | symprefix, symprefix); |
658f29a5 | 500 | } |
a4da2e3e DG |
501 | |
502 | /* | |
503 | * Reserve map entries. | |
504 | * Align the reserve map to a doubleword boundary. | |
505 | * Each entry is an (address, size) pair of u64 values. | |
506 | * Always supply a zero-sized temination entry. | |
507 | */ | |
508 | asm_emit_align(f, 8); | |
509 | emit_label(f, symprefix, "reserve_map"); | |
510 | ||
511 | fprintf(f, "/* Memory reserve map from source file */\n"); | |
512 | ||
513 | /* | |
9bb9c6a1 | 514 | * Use .long on high and low halves of u64s to avoid .quad |
a4da2e3e DG |
515 | * as it appears .quad isn't available in some assemblers. |
516 | */ | |
6f05afcb | 517 | for (re = dti->reservelist; re; re = re->next) { |
658f29a5 JB |
518 | struct label *l; |
519 | ||
520 | for_each_label(re->labels, l) { | |
521 | fprintf(f, "\t.globl\t%s\n", l->label); | |
522 | fprintf(f, "%s:\n", l->label); | |
a4da2e3e | 523 | } |
89d12310 | 524 | ASM_EMIT_BELONG(f, "0x%08x", (unsigned int)(re->address >> 32)); |
658f29a5 | 525 | ASM_EMIT_BELONG(f, "0x%08x", |
89d12310 RH |
526 | (unsigned int)(re->address & 0xffffffff)); |
527 | ASM_EMIT_BELONG(f, "0x%08x", (unsigned int)(re->size >> 32)); | |
528 | ASM_EMIT_BELONG(f, "0x%08x", (unsigned int)(re->size & 0xffffffff)); | |
a4da2e3e DG |
529 | } |
530 | for (i = 0; i < reservenum; i++) { | |
531 | fprintf(f, "\t.long\t0, 0\n\t.long\t0, 0\n"); | |
532 | } | |
533 | ||
534 | fprintf(f, "\t.long\t0, 0\n\t.long\t0, 0\n"); | |
535 | ||
536 | emit_label(f, symprefix, "struct_start"); | |
6f05afcb | 537 | flatten_tree(dti->dt, &asm_emitter, f, &strbuf, vi); |
658f29a5 JB |
538 | |
539 | fprintf(f, "\t/* FDT_END */\n"); | |
540 | asm_emit_cell(f, FDT_END); | |
a4da2e3e DG |
541 | emit_label(f, symprefix, "struct_end"); |
542 | ||
543 | emit_label(f, symprefix, "strings_start"); | |
544 | dump_stringtable_asm(f, strbuf); | |
545 | emit_label(f, symprefix, "strings_end"); | |
546 | ||
547 | emit_label(f, symprefix, "blob_end"); | |
548 | ||
549 | /* | |
550 | * If the user asked for more space than is used, pad it out. | |
551 | */ | |
552 | if (minsize > 0) { | |
553 | fprintf(f, "\t.space\t%d - (_%s_blob_end - _%s_blob_start), 0\n", | |
554 | minsize, symprefix, symprefix); | |
555 | } | |
556 | if (padsize > 0) { | |
557 | fprintf(f, "\t.space\t%d, 0\n", padsize); | |
558 | } | |
6f05afcb RH |
559 | if (alignsize > 0) |
560 | asm_emit_align(f, alignsize); | |
a4da2e3e DG |
561 | emit_label(f, symprefix, "blob_abs_end"); |
562 | ||
563 | data_free(strbuf); | |
564 | } | |
565 | ||
566 | struct inbuf { | |
567 | char *base, *limit, *ptr; | |
568 | }; | |
569 | ||
570 | static void inbuf_init(struct inbuf *inb, void *base, void *limit) | |
571 | { | |
572 | inb->base = base; | |
573 | inb->limit = limit; | |
574 | inb->ptr = inb->base; | |
575 | } | |
576 | ||
577 | static void flat_read_chunk(struct inbuf *inb, void *p, int len) | |
578 | { | |
579 | if ((inb->ptr + len) > inb->limit) | |
580 | die("Premature end of data parsing flat device tree\n"); | |
581 | ||
582 | memcpy(p, inb->ptr, len); | |
583 | ||
584 | inb->ptr += len; | |
585 | } | |
586 | ||
ed95d745 | 587 | static uint32_t flat_read_word(struct inbuf *inb) |
a4da2e3e | 588 | { |
89d12310 | 589 | fdt32_t val; |
a4da2e3e DG |
590 | |
591 | assert(((inb->ptr - inb->base) % sizeof(val)) == 0); | |
592 | ||
593 | flat_read_chunk(inb, &val, sizeof(val)); | |
594 | ||
ed95d745 | 595 | return fdt32_to_cpu(val); |
a4da2e3e DG |
596 | } |
597 | ||
598 | static void flat_realign(struct inbuf *inb, int align) | |
599 | { | |
600 | int off = inb->ptr - inb->base; | |
601 | ||
602 | inb->ptr = inb->base + ALIGN(off, align); | |
603 | if (inb->ptr > inb->limit) | |
604 | die("Premature end of data parsing flat device tree\n"); | |
605 | } | |
606 | ||
607 | static char *flat_read_string(struct inbuf *inb) | |
608 | { | |
609 | int len = 0; | |
610 | const char *p = inb->ptr; | |
611 | char *str; | |
612 | ||
613 | do { | |
614 | if (p >= inb->limit) | |
615 | die("Premature end of data parsing flat device tree\n"); | |
616 | len++; | |
617 | } while ((*p++) != '\0'); | |
618 | ||
658f29a5 | 619 | str = xstrdup(inb->ptr); |
a4da2e3e DG |
620 | |
621 | inb->ptr += len; | |
622 | ||
ed95d745 | 623 | flat_realign(inb, sizeof(uint32_t)); |
a4da2e3e DG |
624 | |
625 | return str; | |
626 | } | |
627 | ||
628 | static struct data flat_read_data(struct inbuf *inb, int len) | |
629 | { | |
630 | struct data d = empty_data; | |
631 | ||
632 | if (len == 0) | |
633 | return empty_data; | |
634 | ||
635 | d = data_grow_for(d, len); | |
636 | d.len = len; | |
637 | ||
638 | flat_read_chunk(inb, d.val, len); | |
639 | ||
ed95d745 | 640 | flat_realign(inb, sizeof(uint32_t)); |
a4da2e3e DG |
641 | |
642 | return d; | |
643 | } | |
644 | ||
645 | static char *flat_read_stringtable(struct inbuf *inb, int offset) | |
646 | { | |
647 | const char *p; | |
648 | ||
649 | p = inb->base + offset; | |
650 | while (1) { | |
651 | if (p >= inb->limit || p < inb->base) | |
652 | die("String offset %d overruns string table\n", | |
653 | offset); | |
654 | ||
655 | if (*p == '\0') | |
656 | break; | |
657 | ||
658 | p++; | |
659 | } | |
660 | ||
658f29a5 | 661 | return xstrdup(inb->base + offset); |
a4da2e3e DG |
662 | } |
663 | ||
664 | static struct property *flat_read_property(struct inbuf *dtbuf, | |
665 | struct inbuf *strbuf, int flags) | |
666 | { | |
ed95d745 | 667 | uint32_t proplen, stroff; |
a4da2e3e DG |
668 | char *name; |
669 | struct data val; | |
670 | ||
671 | proplen = flat_read_word(dtbuf); | |
672 | stroff = flat_read_word(dtbuf); | |
673 | ||
674 | name = flat_read_stringtable(strbuf, stroff); | |
675 | ||
676 | if ((flags & FTF_VARALIGN) && (proplen >= 8)) | |
677 | flat_realign(dtbuf, 8); | |
678 | ||
679 | val = flat_read_data(dtbuf, proplen); | |
680 | ||
c2e7075c | 681 | return build_property(name, val, NULL); |
a4da2e3e DG |
682 | } |
683 | ||
684 | ||
685 | static struct reserve_info *flat_read_mem_reserve(struct inbuf *inb) | |
686 | { | |
687 | struct reserve_info *reservelist = NULL; | |
688 | struct reserve_info *new; | |
a4da2e3e DG |
689 | struct fdt_reserve_entry re; |
690 | ||
691 | /* | |
692 | * Each entry is a pair of u64 (addr, size) values for 4 cell_t's. | |
693 | * List terminates at an entry with size equal to zero. | |
694 | * | |
695 | * First pass, count entries. | |
696 | */ | |
a4da2e3e | 697 | while (1) { |
89d12310 RH |
698 | uint64_t address, size; |
699 | ||
a4da2e3e | 700 | flat_read_chunk(inb, &re, sizeof(re)); |
89d12310 RH |
701 | address = fdt64_to_cpu(re.address); |
702 | size = fdt64_to_cpu(re.size); | |
703 | if (size == 0) | |
a4da2e3e DG |
704 | break; |
705 | ||
89d12310 | 706 | new = build_reserve_entry(address, size); |
a4da2e3e DG |
707 | reservelist = add_reserve_entry(reservelist, new); |
708 | } | |
709 | ||
710 | return reservelist; | |
711 | } | |
712 | ||
713 | ||
714 | static char *nodename_from_path(const char *ppath, const char *cpath) | |
715 | { | |
a4da2e3e DG |
716 | int plen; |
717 | ||
ed95d745 | 718 | plen = strlen(ppath); |
a4da2e3e | 719 | |
9130ba88 | 720 | if (!strstarts(cpath, ppath)) |
ed95d745 DG |
721 | die("Path \"%s\" is not valid as a child of \"%s\"\n", |
722 | cpath, ppath); | |
a4da2e3e | 723 | |
ed95d745 DG |
724 | /* root node is a special case */ |
725 | if (!streq(ppath, "/")) | |
726 | plen++; | |
a4da2e3e | 727 | |
658f29a5 | 728 | return xstrdup(cpath + plen); |
a4da2e3e DG |
729 | } |
730 | ||
731 | static struct node *unflatten_tree(struct inbuf *dtbuf, | |
732 | struct inbuf *strbuf, | |
ed95d745 | 733 | const char *parent_flatname, int flags) |
a4da2e3e DG |
734 | { |
735 | struct node *node; | |
ed95d745 DG |
736 | char *flatname; |
737 | uint32_t val; | |
a4da2e3e | 738 | |
c2e7075c | 739 | node = build_node(NULL, NULL, NULL); |
a4da2e3e | 740 | |
ed95d745 | 741 | flatname = flat_read_string(dtbuf); |
a4da2e3e | 742 | |
ed95d745 DG |
743 | if (flags & FTF_FULLPATH) |
744 | node->name = nodename_from_path(parent_flatname, flatname); | |
745 | else | |
746 | node->name = flatname; | |
a4da2e3e DG |
747 | |
748 | do { | |
749 | struct property *prop; | |
750 | struct node *child; | |
751 | ||
752 | val = flat_read_word(dtbuf); | |
753 | switch (val) { | |
754 | case FDT_PROP: | |
755 | if (node->children) | |
756 | fprintf(stderr, "Warning: Flat tree input has " | |
757 | "subnodes preceding a property.\n"); | |
758 | prop = flat_read_property(dtbuf, strbuf, flags); | |
759 | add_property(node, prop); | |
760 | break; | |
761 | ||
762 | case FDT_BEGIN_NODE: | |
ed95d745 | 763 | child = unflatten_tree(dtbuf,strbuf, flatname, flags); |
a4da2e3e DG |
764 | add_child(node, child); |
765 | break; | |
766 | ||
767 | case FDT_END_NODE: | |
768 | break; | |
769 | ||
770 | case FDT_END: | |
771 | die("Premature FDT_END in device tree blob\n"); | |
772 | break; | |
773 | ||
774 | case FDT_NOP: | |
775 | if (!(flags & FTF_NOPS)) | |
776 | fprintf(stderr, "Warning: NOP tag found in flat tree" | |
777 | " version <16\n"); | |
778 | ||
779 | /* Ignore */ | |
780 | break; | |
781 | ||
782 | default: | |
783 | die("Invalid opcode word %08x in device tree blob\n", | |
784 | val); | |
785 | } | |
786 | } while (val != FDT_END_NODE); | |
787 | ||
6f05afcb RH |
788 | if (node->name != flatname) { |
789 | free(flatname); | |
790 | } | |
791 | ||
a4da2e3e DG |
792 | return node; |
793 | } | |
794 | ||
795 | ||
6f05afcb | 796 | struct dt_info *dt_from_blob(const char *fname) |
a4da2e3e | 797 | { |
658f29a5 | 798 | FILE *f; |
89d12310 | 799 | fdt32_t magic_buf, totalsize_buf; |
ed95d745 DG |
800 | uint32_t magic, totalsize, version, size_dt, boot_cpuid_phys; |
801 | uint32_t off_dt, off_str, off_mem_rsvmap; | |
a4da2e3e DG |
802 | int rc; |
803 | char *blob; | |
804 | struct fdt_header *fdt; | |
805 | char *p; | |
806 | struct inbuf dtbuf, strbuf; | |
807 | struct inbuf memresvbuf; | |
808 | int sizeleft; | |
809 | struct reserve_info *reservelist; | |
810 | struct node *tree; | |
ed95d745 | 811 | uint32_t val; |
a4da2e3e DG |
812 | int flags = 0; |
813 | ||
658f29a5 | 814 | f = srcfile_relative_open(fname, NULL); |
ed95d745 | 815 | |
89d12310 | 816 | rc = fread(&magic_buf, sizeof(magic_buf), 1, f); |
658f29a5 | 817 | if (ferror(f)) |
a4da2e3e DG |
818 | die("Error reading DT blob magic number: %s\n", |
819 | strerror(errno)); | |
820 | if (rc < 1) { | |
658f29a5 | 821 | if (feof(f)) |
a4da2e3e DG |
822 | die("EOF reading DT blob magic number\n"); |
823 | else | |
824 | die("Mysterious short read reading magic number\n"); | |
825 | } | |
826 | ||
89d12310 | 827 | magic = fdt32_to_cpu(magic_buf); |
a4da2e3e DG |
828 | if (magic != FDT_MAGIC) |
829 | die("Blob has incorrect magic number\n"); | |
830 | ||
89d12310 | 831 | rc = fread(&totalsize_buf, sizeof(totalsize_buf), 1, f); |
658f29a5 | 832 | if (ferror(f)) |
a4da2e3e DG |
833 | die("Error reading DT blob size: %s\n", strerror(errno)); |
834 | if (rc < 1) { | |
658f29a5 | 835 | if (feof(f)) |
a4da2e3e DG |
836 | die("EOF reading DT blob size\n"); |
837 | else | |
838 | die("Mysterious short read reading blob size\n"); | |
839 | } | |
840 | ||
89d12310 | 841 | totalsize = fdt32_to_cpu(totalsize_buf); |
a4da2e3e DG |
842 | if (totalsize < FDT_V1_SIZE) |
843 | die("DT blob size (%d) is too small\n", totalsize); | |
844 | ||
845 | blob = xmalloc(totalsize); | |
846 | ||
847 | fdt = (struct fdt_header *)blob; | |
ed95d745 DG |
848 | fdt->magic = cpu_to_fdt32(magic); |
849 | fdt->totalsize = cpu_to_fdt32(totalsize); | |
a4da2e3e DG |
850 | |
851 | sizeleft = totalsize - sizeof(magic) - sizeof(totalsize); | |
852 | p = blob + sizeof(magic) + sizeof(totalsize); | |
853 | ||
854 | while (sizeleft) { | |
658f29a5 | 855 | if (feof(f)) |
a4da2e3e DG |
856 | die("EOF before reading %d bytes of DT blob\n", |
857 | totalsize); | |
858 | ||
658f29a5 JB |
859 | rc = fread(p, 1, sizeleft, f); |
860 | if (ferror(f)) | |
a4da2e3e DG |
861 | die("Error reading DT blob: %s\n", |
862 | strerror(errno)); | |
863 | ||
864 | sizeleft -= rc; | |
865 | p += rc; | |
866 | } | |
867 | ||
ed95d745 DG |
868 | off_dt = fdt32_to_cpu(fdt->off_dt_struct); |
869 | off_str = fdt32_to_cpu(fdt->off_dt_strings); | |
870 | off_mem_rsvmap = fdt32_to_cpu(fdt->off_mem_rsvmap); | |
871 | version = fdt32_to_cpu(fdt->version); | |
872 | boot_cpuid_phys = fdt32_to_cpu(fdt->boot_cpuid_phys); | |
a4da2e3e DG |
873 | |
874 | if (off_mem_rsvmap >= totalsize) | |
875 | die("Mem Reserve structure offset exceeds total size\n"); | |
876 | ||
877 | if (off_dt >= totalsize) | |
878 | die("DT structure offset exceeds total size\n"); | |
879 | ||
880 | if (off_str > totalsize) | |
881 | die("String table offset exceeds total size\n"); | |
882 | ||
a4da2e3e | 883 | if (version >= 3) { |
ed95d745 | 884 | uint32_t size_str = fdt32_to_cpu(fdt->size_dt_strings); |
b9937347 | 885 | if ((off_str+size_str < off_str) || (off_str+size_str > totalsize)) |
a4da2e3e | 886 | die("String table extends past total size\n"); |
ed95d745 DG |
887 | inbuf_init(&strbuf, blob + off_str, blob + off_str + size_str); |
888 | } else { | |
889 | inbuf_init(&strbuf, blob + off_str, blob + totalsize); | |
a4da2e3e DG |
890 | } |
891 | ||
892 | if (version >= 17) { | |
ed95d745 | 893 | size_dt = fdt32_to_cpu(fdt->size_dt_struct); |
b9937347 | 894 | if ((off_dt+size_dt < off_dt) || (off_dt+size_dt > totalsize)) |
a4da2e3e DG |
895 | die("Structure block extends past total size\n"); |
896 | } | |
897 | ||
898 | if (version < 16) { | |
899 | flags |= FTF_FULLPATH | FTF_NAMEPROPS | FTF_VARALIGN; | |
900 | } else { | |
901 | flags |= FTF_NOPS; | |
902 | } | |
903 | ||
904 | inbuf_init(&memresvbuf, | |
905 | blob + off_mem_rsvmap, blob + totalsize); | |
906 | inbuf_init(&dtbuf, blob + off_dt, blob + totalsize); | |
a4da2e3e DG |
907 | |
908 | reservelist = flat_read_mem_reserve(&memresvbuf); | |
909 | ||
910 | val = flat_read_word(&dtbuf); | |
911 | ||
912 | if (val != FDT_BEGIN_NODE) | |
913 | die("Device tree blob doesn't begin with FDT_BEGIN_NODE (begins with 0x%08x)\n", val); | |
914 | ||
915 | tree = unflatten_tree(&dtbuf, &strbuf, "", flags); | |
916 | ||
917 | val = flat_read_word(&dtbuf); | |
918 | if (val != FDT_END) | |
919 | die("Device tree blob doesn't end with FDT_END\n"); | |
920 | ||
921 | free(blob); | |
922 | ||
658f29a5 | 923 | fclose(f); |
ed95d745 | 924 | |
6f05afcb | 925 | return build_dt_info(DTSF_V1, reservelist, tree, boot_cpuid_phys); |
a4da2e3e | 926 | } |