xref: /openbmc/u-boot/common/fdt_support.c (revision 5794619e)
1 /*
2  * (C) Copyright 2007
3  * Gerald Van Baren, Custom IDEAS, vanbaren@cideas.com
4  *
5  * See file CREDITS for list of people who contributed to this
6  * project.
7  *
8  * This program is free software; you can redistribute it and/or
9  * modify it under the terms of the GNU General Public License as
10  * published by the Free Software Foundation; either version 2 of
11  * the License, or (at your option) any later version.
12  *
13  * This program is distributed in the hope that it will be useful,
14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
16  * GNU General Public License for more details.
17  *
18  * You should have received a copy of the GNU General Public License
19  * along with this program; if not, write to the Free Software
20  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
21  * MA 02111-1307 USA
22  */
23 
24 #include <common.h>
25 #include <stdio_dev.h>
26 #include <linux/ctype.h>
27 #include <linux/types.h>
28 #include <asm/global_data.h>
29 #include <fdt.h>
30 #include <libfdt.h>
31 #include <fdt_support.h>
32 #include <exports.h>
33 
34 /*
35  * Global data (for the gd->bd)
36  */
37 DECLARE_GLOBAL_DATA_PTR;
38 
39 /**
40  * fdt_getprop_u32_default - Find a node and return it's property or a default
41  *
42  * @fdt: ptr to device tree
43  * @path: path of node
44  * @prop: property name
45  * @dflt: default value if the property isn't found
46  *
47  * Convenience function to find a node and return it's property or a
48  * default value if it doesn't exist.
49  */
50 u32 fdt_getprop_u32_default(void *fdt, const char *path, const char *prop,
51 				const u32 dflt)
52 {
53 	const u32 *val;
54 	int off;
55 
56 	off = fdt_path_offset(fdt, path);
57 	if (off < 0)
58 		return dflt;
59 
60 	val = fdt_getprop(fdt, off, prop, NULL);
61 	if (val)
62 		return *val;
63 	else
64 		return dflt;
65 }
66 
67 /**
68  * fdt_find_and_setprop: Find a node and set it's property
69  *
70  * @fdt: ptr to device tree
71  * @node: path of node
72  * @prop: property name
73  * @val: ptr to new value
74  * @len: length of new property value
75  * @create: flag to create the property if it doesn't exist
76  *
77  * Convenience function to directly set a property given the path to the node.
78  */
79 int fdt_find_and_setprop(void *fdt, const char *node, const char *prop,
80 			 const void *val, int len, int create)
81 {
82 	int nodeoff = fdt_path_offset(fdt, node);
83 
84 	if (nodeoff < 0)
85 		return nodeoff;
86 
87 	if ((!create) && (fdt_get_property(fdt, nodeoff, prop, 0) == NULL))
88 		return 0; /* create flag not set; so exit quietly */
89 
90 	return fdt_setprop(fdt, nodeoff, prop, val, len);
91 }
92 
93 #ifdef CONFIG_OF_STDOUT_VIA_ALIAS
94 
95 #ifdef CONFIG_SERIAL_MULTI
96 static void fdt_fill_multisername(char *sername, size_t maxlen)
97 {
98 	const char *outname = stdio_devices[stdout]->name;
99 
100 	if (strcmp(outname, "serial") > 0)
101 		strncpy(sername, outname, maxlen);
102 
103 	/* eserial? */
104 	if (strcmp(outname + 1, "serial") > 0)
105 		strncpy(sername, outname + 1, maxlen);
106 }
107 #else
108 static inline void fdt_fill_multisername(char *sername, size_t maxlen) {}
109 #endif /* CONFIG_SERIAL_MULTI */
110 
111 static int fdt_fixup_stdout(void *fdt, int chosenoff)
112 {
113 	int err = 0;
114 #ifdef CONFIG_CONS_INDEX
115 	int node;
116 	char sername[9] = { 0 };
117 	const char *path;
118 
119 	fdt_fill_multisername(sername, sizeof(sername) - 1);
120 	if (!sername[0])
121 		sprintf(sername, "serial%d", CONFIG_CONS_INDEX - 1);
122 
123 	err = node = fdt_path_offset(fdt, "/aliases");
124 	if (node >= 0) {
125 		int len;
126 		path = fdt_getprop(fdt, node, sername, &len);
127 		if (path) {
128 			char *p = malloc(len);
129 			err = -FDT_ERR_NOSPACE;
130 			if (p) {
131 				memcpy(p, path, len);
132 				err = fdt_setprop(fdt, chosenoff,
133 					"linux,stdout-path", p, len);
134 				free(p);
135 			}
136 		} else {
137 			err = len;
138 		}
139 	}
140 #endif
141 	if (err < 0)
142 		printf("WARNING: could not set linux,stdout-path %s.\n",
143 				fdt_strerror(err));
144 
145 	return err;
146 }
147 #endif
148 
149 int fdt_initrd(void *fdt, ulong initrd_start, ulong initrd_end, int force)
150 {
151 	int   nodeoffset;
152 	int   err, j, total;
153 	u32   tmp;
154 	const char *path;
155 	uint64_t addr, size;
156 
157 	/* Find the "chosen" node.  */
158 	nodeoffset = fdt_path_offset (fdt, "/chosen");
159 
160 	/* If there is no "chosen" node in the blob return */
161 	if (nodeoffset < 0) {
162 		printf("fdt_initrd: %s\n", fdt_strerror(nodeoffset));
163 		return nodeoffset;
164 	}
165 
166 	/* just return if initrd_start/end aren't valid */
167 	if ((initrd_start == 0) || (initrd_end == 0))
168 		return 0;
169 
170 	total = fdt_num_mem_rsv(fdt);
171 
172 	/*
173 	 * Look for an existing entry and update it.  If we don't find
174 	 * the entry, we will j be the next available slot.
175 	 */
176 	for (j = 0; j < total; j++) {
177 		err = fdt_get_mem_rsv(fdt, j, &addr, &size);
178 		if (addr == initrd_start) {
179 			fdt_del_mem_rsv(fdt, j);
180 			break;
181 		}
182 	}
183 
184 	err = fdt_add_mem_rsv(fdt, initrd_start, initrd_end - initrd_start + 1);
185 	if (err < 0) {
186 		printf("fdt_initrd: %s\n", fdt_strerror(err));
187 		return err;
188 	}
189 
190 	path = fdt_getprop(fdt, nodeoffset, "linux,initrd-start", NULL);
191 	if ((path == NULL) || force) {
192 		tmp = __cpu_to_be32(initrd_start);
193 		err = fdt_setprop(fdt, nodeoffset,
194 			"linux,initrd-start", &tmp, sizeof(tmp));
195 		if (err < 0) {
196 			printf("WARNING: "
197 				"could not set linux,initrd-start %s.\n",
198 				fdt_strerror(err));
199 			return err;
200 		}
201 		tmp = __cpu_to_be32(initrd_end);
202 		err = fdt_setprop(fdt, nodeoffset,
203 			"linux,initrd-end", &tmp, sizeof(tmp));
204 		if (err < 0) {
205 			printf("WARNING: could not set linux,initrd-end %s.\n",
206 				fdt_strerror(err));
207 
208 			return err;
209 		}
210 	}
211 
212 	return 0;
213 }
214 
215 int fdt_chosen(void *fdt, int force)
216 {
217 	int   nodeoffset;
218 	int   err;
219 	char  *str;		/* used to set string properties */
220 	const char *path;
221 
222 	err = fdt_check_header(fdt);
223 	if (err < 0) {
224 		printf("fdt_chosen: %s\n", fdt_strerror(err));
225 		return err;
226 	}
227 
228 	/*
229 	 * Find the "chosen" node.
230 	 */
231 	nodeoffset = fdt_path_offset (fdt, "/chosen");
232 
233 	/*
234 	 * If there is no "chosen" node in the blob, create it.
235 	 */
236 	if (nodeoffset < 0) {
237 		/*
238 		 * Create a new node "/chosen" (offset 0 is root level)
239 		 */
240 		nodeoffset = fdt_add_subnode(fdt, 0, "chosen");
241 		if (nodeoffset < 0) {
242 			printf("WARNING: could not create /chosen %s.\n",
243 				fdt_strerror(nodeoffset));
244 			return nodeoffset;
245 		}
246 	}
247 
248 	/*
249 	 * Create /chosen properites that don't exist in the fdt.
250 	 * If the property exists, update it only if the "force" parameter
251 	 * is true.
252 	 */
253 	str = getenv("bootargs");
254 	if (str != NULL) {
255 		path = fdt_getprop(fdt, nodeoffset, "bootargs", NULL);
256 		if ((path == NULL) || force) {
257 			err = fdt_setprop(fdt, nodeoffset,
258 				"bootargs", str, strlen(str)+1);
259 			if (err < 0)
260 				printf("WARNING: could not set bootargs %s.\n",
261 					fdt_strerror(err));
262 		}
263 	}
264 
265 #ifdef CONFIG_OF_STDOUT_VIA_ALIAS
266 	path = fdt_getprop(fdt, nodeoffset, "linux,stdout-path", NULL);
267 	if ((path == NULL) || force)
268 		err = fdt_fixup_stdout(fdt, nodeoffset);
269 #endif
270 
271 #ifdef OF_STDOUT_PATH
272 	path = fdt_getprop(fdt, nodeoffset, "linux,stdout-path", NULL);
273 	if ((path == NULL) || force) {
274 		err = fdt_setprop(fdt, nodeoffset,
275 			"linux,stdout-path", OF_STDOUT_PATH, strlen(OF_STDOUT_PATH)+1);
276 		if (err < 0)
277 			printf("WARNING: could not set linux,stdout-path %s.\n",
278 				fdt_strerror(err));
279 	}
280 #endif
281 
282 	return err;
283 }
284 
285 void do_fixup_by_path(void *fdt, const char *path, const char *prop,
286 		      const void *val, int len, int create)
287 {
288 #if defined(DEBUG)
289 	int i;
290 	debug("Updating property '%s/%s' = ", path, prop);
291 	for (i = 0; i < len; i++)
292 		debug(" %.2x", *(u8*)(val+i));
293 	debug("\n");
294 #endif
295 	int rc = fdt_find_and_setprop(fdt, path, prop, val, len, create);
296 	if (rc)
297 		printf("Unable to update property %s:%s, err=%s\n",
298 			path, prop, fdt_strerror(rc));
299 }
300 
301 void do_fixup_by_path_u32(void *fdt, const char *path, const char *prop,
302 			  u32 val, int create)
303 {
304 	val = cpu_to_fdt32(val);
305 	do_fixup_by_path(fdt, path, prop, &val, sizeof(val), create);
306 }
307 
308 void do_fixup_by_prop(void *fdt,
309 		      const char *pname, const void *pval, int plen,
310 		      const char *prop, const void *val, int len,
311 		      int create)
312 {
313 	int off;
314 #if defined(DEBUG)
315 	int i;
316 	debug("Updating property '%s' = ", prop);
317 	for (i = 0; i < len; i++)
318 		debug(" %.2x", *(u8*)(val+i));
319 	debug("\n");
320 #endif
321 	off = fdt_node_offset_by_prop_value(fdt, -1, pname, pval, plen);
322 	while (off != -FDT_ERR_NOTFOUND) {
323 		if (create || (fdt_get_property(fdt, off, prop, 0) != NULL))
324 			fdt_setprop(fdt, off, prop, val, len);
325 		off = fdt_node_offset_by_prop_value(fdt, off, pname, pval, plen);
326 	}
327 }
328 
329 void do_fixup_by_prop_u32(void *fdt,
330 			  const char *pname, const void *pval, int plen,
331 			  const char *prop, u32 val, int create)
332 {
333 	val = cpu_to_fdt32(val);
334 	do_fixup_by_prop(fdt, pname, pval, plen, prop, &val, 4, create);
335 }
336 
337 void do_fixup_by_compat(void *fdt, const char *compat,
338 			const char *prop, const void *val, int len, int create)
339 {
340 	int off = -1;
341 #if defined(DEBUG)
342 	int i;
343 	debug("Updating property '%s' = ", prop);
344 	for (i = 0; i < len; i++)
345 		debug(" %.2x", *(u8*)(val+i));
346 	debug("\n");
347 #endif
348 	off = fdt_node_offset_by_compatible(fdt, -1, compat);
349 	while (off != -FDT_ERR_NOTFOUND) {
350 		if (create || (fdt_get_property(fdt, off, prop, 0) != NULL))
351 			fdt_setprop(fdt, off, prop, val, len);
352 		off = fdt_node_offset_by_compatible(fdt, off, compat);
353 	}
354 }
355 
356 void do_fixup_by_compat_u32(void *fdt, const char *compat,
357 			    const char *prop, u32 val, int create)
358 {
359 	val = cpu_to_fdt32(val);
360 	do_fixup_by_compat(fdt, compat, prop, &val, 4, create);
361 }
362 
363 int fdt_fixup_memory(void *blob, u64 start, u64 size)
364 {
365 	int err, nodeoffset, len = 0;
366 	u8 tmp[16];
367 	const u32 *addrcell, *sizecell;
368 
369 	err = fdt_check_header(blob);
370 	if (err < 0) {
371 		printf("%s: %s\n", __FUNCTION__, fdt_strerror(err));
372 		return err;
373 	}
374 
375 	/* update, or add and update /memory node */
376 	nodeoffset = fdt_path_offset(blob, "/memory");
377 	if (nodeoffset < 0) {
378 		nodeoffset = fdt_add_subnode(blob, 0, "memory");
379 		if (nodeoffset < 0)
380 			printf("WARNING: could not create /memory: %s.\n",
381 					fdt_strerror(nodeoffset));
382 		return nodeoffset;
383 	}
384 	err = fdt_setprop(blob, nodeoffset, "device_type", "memory",
385 			sizeof("memory"));
386 	if (err < 0) {
387 		printf("WARNING: could not set %s %s.\n", "device_type",
388 				fdt_strerror(err));
389 		return err;
390 	}
391 
392 	addrcell = fdt_getprop(blob, 0, "#address-cells", NULL);
393 	/* use shifts and mask to ensure endianness */
394 	if ((addrcell) && (*addrcell == 2)) {
395 		tmp[0] = (start >> 56) & 0xff;
396 		tmp[1] = (start >> 48) & 0xff;
397 		tmp[2] = (start >> 40) & 0xff;
398 		tmp[3] = (start >> 32) & 0xff;
399 		tmp[4] = (start >> 24) & 0xff;
400 		tmp[5] = (start >> 16) & 0xff;
401 		tmp[6] = (start >>  8) & 0xff;
402 		tmp[7] = (start      ) & 0xff;
403 		len = 8;
404 	} else {
405 		tmp[0] = (start >> 24) & 0xff;
406 		tmp[1] = (start >> 16) & 0xff;
407 		tmp[2] = (start >>  8) & 0xff;
408 		tmp[3] = (start      ) & 0xff;
409 		len = 4;
410 	}
411 
412 	sizecell = fdt_getprop(blob, 0, "#size-cells", NULL);
413 	/* use shifts and mask to ensure endianness */
414 	if ((sizecell) && (*sizecell == 2)) {
415 		tmp[0+len] = (size >> 56) & 0xff;
416 		tmp[1+len] = (size >> 48) & 0xff;
417 		tmp[2+len] = (size >> 40) & 0xff;
418 		tmp[3+len] = (size >> 32) & 0xff;
419 		tmp[4+len] = (size >> 24) & 0xff;
420 		tmp[5+len] = (size >> 16) & 0xff;
421 		tmp[6+len] = (size >>  8) & 0xff;
422 		tmp[7+len] = (size      ) & 0xff;
423 		len += 8;
424 	} else {
425 		tmp[0+len] = (size >> 24) & 0xff;
426 		tmp[1+len] = (size >> 16) & 0xff;
427 		tmp[2+len] = (size >>  8) & 0xff;
428 		tmp[3+len] = (size      ) & 0xff;
429 		len += 4;
430 	}
431 
432 	err = fdt_setprop(blob, nodeoffset, "reg", tmp, len);
433 	if (err < 0) {
434 		printf("WARNING: could not set %s %s.\n",
435 				"reg", fdt_strerror(err));
436 		return err;
437 	}
438 	return 0;
439 }
440 
441 void fdt_fixup_ethernet(void *fdt)
442 {
443 	int node, i, j;
444 	char enet[16], *tmp, *end;
445 	char mac[16] = "ethaddr";
446 	const char *path;
447 	unsigned char mac_addr[6];
448 
449 	node = fdt_path_offset(fdt, "/aliases");
450 	if (node < 0)
451 		return;
452 
453 	i = 0;
454 	while ((tmp = getenv(mac)) != NULL) {
455 		sprintf(enet, "ethernet%d", i);
456 		path = fdt_getprop(fdt, node, enet, NULL);
457 		if (!path) {
458 			debug("No alias for %s\n", enet);
459 			sprintf(mac, "eth%daddr", ++i);
460 			continue;
461 		}
462 
463 		for (j = 0; j < 6; j++) {
464 			mac_addr[j] = tmp ? simple_strtoul(tmp, &end, 16) : 0;
465 			if (tmp)
466 				tmp = (*end) ? end+1 : end;
467 		}
468 
469 		do_fixup_by_path(fdt, path, "mac-address", &mac_addr, 6, 0);
470 		do_fixup_by_path(fdt, path, "local-mac-address",
471 				&mac_addr, 6, 1);
472 
473 		sprintf(mac, "eth%daddr", ++i);
474 	}
475 }
476 
477 #ifdef CONFIG_HAS_FSL_DR_USB
478 void fdt_fixup_dr_usb(void *blob, bd_t *bd)
479 {
480 	char *mode;
481 	char *type;
482 	const char *compat = "fsl-usb2-dr";
483 	const char *prop_mode = "dr_mode";
484 	const char *prop_type = "phy_type";
485 	int node_offset;
486 	int err;
487 
488 	mode = getenv("usb_dr_mode");
489 	type = getenv("usb_phy_type");
490 	if (!mode && !type)
491 		return;
492 
493 	node_offset = fdt_node_offset_by_compatible(blob, 0, compat);
494 	if (node_offset < 0) {
495 		printf("WARNING: could not find compatible node %s: %s.\n",
496 			compat, fdt_strerror(node_offset));
497 		return;
498 	}
499 
500 	if (mode) {
501 		err = fdt_setprop(blob, node_offset, prop_mode, mode,
502 				  strlen(mode) + 1);
503 		if (err < 0)
504 			printf("WARNING: could not set %s for %s: %s.\n",
505 			       prop_mode, compat, fdt_strerror(err));
506 	}
507 
508 	if (type) {
509 		err = fdt_setprop(blob, node_offset, prop_type, type,
510 				  strlen(type) + 1);
511 		if (err < 0)
512 			printf("WARNING: could not set %s for %s: %s.\n",
513 			       prop_type, compat, fdt_strerror(err));
514 	}
515 }
516 #endif /* CONFIG_HAS_FSL_DR_USB */
517 
518 #if defined(CONFIG_MPC83xx) || defined(CONFIG_MPC85xx)
519 /*
520  * update crypto node properties to a specified revision of the SEC
521  * called with sec_rev == 0 if not on an mpc8xxxE processor
522  */
523 void fdt_fixup_crypto_node(void *blob, int sec_rev)
524 {
525 	const struct sec_rev_prop {
526 		u32 sec_rev;
527 		u32 num_channels;
528 		u32 channel_fifo_len;
529 		u32 exec_units_mask;
530 		u32 descriptor_types_mask;
531 	} sec_rev_prop_list [] = {
532 		{ 0x0200, 4, 24, 0x07e, 0x01010ebf }, /* SEC 2.0 */
533 		{ 0x0201, 4, 24, 0x0fe, 0x012b0ebf }, /* SEC 2.1 */
534 		{ 0x0202, 1, 24, 0x04c, 0x0122003f }, /* SEC 2.2 */
535 		{ 0x0204, 4, 24, 0x07e, 0x012b0ebf }, /* SEC 2.4 */
536 		{ 0x0300, 4, 24, 0x9fe, 0x03ab0ebf }, /* SEC 3.0 */
537 		{ 0x0303, 4, 24, 0x97c, 0x03ab0abf }, /* SEC 3.3 */
538 	};
539 	char compat_strlist[ARRAY_SIZE(sec_rev_prop_list) *
540 			    sizeof("fsl,secX.Y")];
541 	int crypto_node, sec_idx, err;
542 	char *p;
543 	u32 val;
544 
545 	/* locate crypto node based on lowest common compatible */
546 	crypto_node = fdt_node_offset_by_compatible(blob, -1, "fsl,sec2.0");
547 	if (crypto_node == -FDT_ERR_NOTFOUND)
548 		return;
549 
550 	/* delete it if not on an E-processor */
551 	if (crypto_node > 0 && !sec_rev) {
552 		fdt_del_node(blob, crypto_node);
553 		return;
554 	}
555 
556 	/* else we got called for possible uprev */
557 	for (sec_idx = 0; sec_idx < ARRAY_SIZE(sec_rev_prop_list); sec_idx++)
558 		if (sec_rev_prop_list[sec_idx].sec_rev == sec_rev)
559 			break;
560 
561 	if (sec_idx == ARRAY_SIZE(sec_rev_prop_list)) {
562 		puts("warning: unknown SEC revision number\n");
563 		return;
564 	}
565 
566 	val = cpu_to_fdt32(sec_rev_prop_list[sec_idx].num_channels);
567 	err = fdt_setprop(blob, crypto_node, "fsl,num-channels", &val, 4);
568 	if (err < 0)
569 		printf("WARNING: could not set crypto property: %s\n",
570 		       fdt_strerror(err));
571 
572 	val = cpu_to_fdt32(sec_rev_prop_list[sec_idx].descriptor_types_mask);
573 	err = fdt_setprop(blob, crypto_node, "fsl,descriptor-types-mask", &val, 4);
574 	if (err < 0)
575 		printf("WARNING: could not set crypto property: %s\n",
576 		       fdt_strerror(err));
577 
578 	val = cpu_to_fdt32(sec_rev_prop_list[sec_idx].exec_units_mask);
579 	err = fdt_setprop(blob, crypto_node, "fsl,exec-units-mask", &val, 4);
580 	if (err < 0)
581 		printf("WARNING: could not set crypto property: %s\n",
582 		       fdt_strerror(err));
583 
584 	val = cpu_to_fdt32(sec_rev_prop_list[sec_idx].channel_fifo_len);
585 	err = fdt_setprop(blob, crypto_node, "fsl,channel-fifo-len", &val, 4);
586 	if (err < 0)
587 		printf("WARNING: could not set crypto property: %s\n",
588 		       fdt_strerror(err));
589 
590 	val = 0;
591 	while (sec_idx >= 0) {
592 		p = compat_strlist + val;
593 		val += sprintf(p, "fsl,sec%d.%d",
594 			(sec_rev_prop_list[sec_idx].sec_rev & 0xff00) >> 8,
595 			sec_rev_prop_list[sec_idx].sec_rev & 0x00ff) + 1;
596 		sec_idx--;
597 	}
598 	err = fdt_setprop(blob, crypto_node, "compatible", &compat_strlist, val);
599 	if (err < 0)
600 		printf("WARNING: could not set crypto property: %s\n",
601 		       fdt_strerror(err));
602 }
603 #endif /* defined(CONFIG_MPC83xx) || defined(CONFIG_MPC85xx) */
604 
605 /* Resize the fdt to its actual size + a bit of padding */
606 int fdt_resize(void *blob)
607 {
608 	int i;
609 	uint64_t addr, size;
610 	int total, ret;
611 	uint actualsize;
612 
613 	if (!blob)
614 		return 0;
615 
616 	total = fdt_num_mem_rsv(blob);
617 	for (i = 0; i < total; i++) {
618 		fdt_get_mem_rsv(blob, i, &addr, &size);
619 		if (addr == (uint64_t)(u32)blob) {
620 			fdt_del_mem_rsv(blob, i);
621 			break;
622 		}
623 	}
624 
625 	/*
626 	 * Calculate the actual size of the fdt
627 	 * plus the size needed for two fdt_add_mem_rsv, one
628 	 * for the fdt itself and one for a possible initrd
629 	 */
630 	actualsize = fdt_off_dt_strings(blob) +
631 		fdt_size_dt_strings(blob) + 2*sizeof(struct fdt_reserve_entry);
632 
633 	/* Make it so the fdt ends on a page boundary */
634 	actualsize = ALIGN(actualsize + ((uint)blob & 0xfff), 0x1000);
635 	actualsize = actualsize - ((uint)blob & 0xfff);
636 
637 	/* Change the fdt header to reflect the correct size */
638 	fdt_set_totalsize(blob, actualsize);
639 
640 	/* Add the new reservation */
641 	ret = fdt_add_mem_rsv(blob, (uint)blob, actualsize);
642 	if (ret < 0)
643 		return ret;
644 
645 	return actualsize;
646 }
647 
648 #ifdef CONFIG_PCI
649 #define CONFIG_SYS_PCI_NR_INBOUND_WIN 4
650 
651 #define FDT_PCI_PREFETCH	(0x40000000)
652 #define FDT_PCI_MEM32		(0x02000000)
653 #define FDT_PCI_IO		(0x01000000)
654 #define FDT_PCI_MEM64		(0x03000000)
655 
656 int fdt_pci_dma_ranges(void *blob, int phb_off, struct pci_controller *hose) {
657 
658 	int addrcell, sizecell, len, r;
659 	u32 *dma_range;
660 	/* sized based on pci addr cells, size-cells, & address-cells */
661 	u32 dma_ranges[(3 + 2 + 2) * CONFIG_SYS_PCI_NR_INBOUND_WIN];
662 
663 	addrcell = fdt_getprop_u32_default(blob, "/", "#address-cells", 1);
664 	sizecell = fdt_getprop_u32_default(blob, "/", "#size-cells", 1);
665 
666 	dma_range = &dma_ranges[0];
667 	for (r = 0; r < hose->region_count; r++) {
668 		u64 bus_start, phys_start, size;
669 
670 		/* skip if !PCI_REGION_SYS_MEMORY */
671 		if (!(hose->regions[r].flags & PCI_REGION_SYS_MEMORY))
672 			continue;
673 
674 		bus_start = (u64)hose->regions[r].bus_start;
675 		phys_start = (u64)hose->regions[r].phys_start;
676 		size = (u64)hose->regions[r].size;
677 
678 		dma_range[0] = 0;
679 		if (size >= 0x100000000ull)
680 			dma_range[0] |= FDT_PCI_MEM64;
681 		else
682 			dma_range[0] |= FDT_PCI_MEM32;
683 		if (hose->regions[r].flags & PCI_REGION_PREFETCH)
684 			dma_range[0] |= FDT_PCI_PREFETCH;
685 #ifdef CONFIG_SYS_PCI_64BIT
686 		dma_range[1] = bus_start >> 32;
687 #else
688 		dma_range[1] = 0;
689 #endif
690 		dma_range[2] = bus_start & 0xffffffff;
691 
692 		if (addrcell == 2) {
693 			dma_range[3] = phys_start >> 32;
694 			dma_range[4] = phys_start & 0xffffffff;
695 		} else {
696 			dma_range[3] = phys_start & 0xffffffff;
697 		}
698 
699 		if (sizecell == 2) {
700 			dma_range[3 + addrcell + 0] = size >> 32;
701 			dma_range[3 + addrcell + 1] = size & 0xffffffff;
702 		} else {
703 			dma_range[3 + addrcell + 0] = size & 0xffffffff;
704 		}
705 
706 		dma_range += (3 + addrcell + sizecell);
707 	}
708 
709 	len = dma_range - &dma_ranges[0];
710 	if (len)
711 		fdt_setprop(blob, phb_off, "dma-ranges", &dma_ranges[0], len*4);
712 
713 	return 0;
714 }
715 #endif
716 
717 #ifdef CONFIG_FDT_FIXUP_NOR_FLASH_SIZE
718 /*
719  * This function can be used to update the size in the "reg" property
720  * of the NOR FLASH device nodes. This is necessary for boards with
721  * non-fixed NOR FLASH sizes.
722  */
723 int fdt_fixup_nor_flash_size(void *blob, int cs, u32 size)
724 {
725 	char compat[][16] = { "cfi-flash", "jedec-flash" };
726 	int off;
727 	int len;
728 	struct fdt_property *prop;
729 	u32 *reg;
730 	int i;
731 
732 	for (i = 0; i < 2; i++) {
733 		off = fdt_node_offset_by_compatible(blob, -1, compat[i]);
734 		while (off != -FDT_ERR_NOTFOUND) {
735 			/*
736 			 * Found one compatible node, now check if this one
737 			 * has the correct CS
738 			 */
739 			prop = fdt_get_property_w(blob, off, "reg", &len);
740 			if (prop) {
741 				reg = (u32 *)&prop->data[0];
742 				if (reg[0] == cs) {
743 					reg[2] = size;
744 					fdt_setprop(blob, off, "reg", reg,
745 						    3 * sizeof(u32));
746 
747 					return 0;
748 				}
749 			}
750 
751 			/* Move to next compatible node */
752 			off = fdt_node_offset_by_compatible(blob, off,
753 							    compat[i]);
754 		}
755 	}
756 
757 	return -1;
758 }
759 #endif
760 
761 #ifdef CONFIG_FDT_FIXUP_PARTITIONS
762 #include <jffs2/load_kernel.h>
763 #include <mtd_node.h>
764 
765 struct reg_cell {
766 	unsigned int r0;
767 	unsigned int r1;
768 };
769 
770 int fdt_del_subnodes(const void *blob, int parent_offset)
771 {
772 	int off, ndepth;
773 	int ret;
774 
775 	for (ndepth = 0, off = fdt_next_node(blob, parent_offset, &ndepth);
776 	     (off >= 0) && (ndepth > 0);
777 	     off = fdt_next_node(blob, off, &ndepth)) {
778 		if (ndepth == 1) {
779 			debug("delete %s: offset: %x\n",
780 				fdt_get_name(blob, off, 0), off);
781 			ret = fdt_del_node((void *)blob, off);
782 			if (ret < 0) {
783 				printf("Can't delete node: %s\n",
784 					fdt_strerror(ret));
785 				return ret;
786 			} else {
787 				ndepth = 0;
788 				off = parent_offset;
789 			}
790 		}
791 	}
792 	return 0;
793 }
794 
795 int fdt_increase_size(void *fdt, int add_len)
796 {
797 	int newlen;
798 
799 	newlen = fdt_totalsize(fdt) + add_len;
800 
801 	/* Open in place with a new len */
802 	return fdt_open_into(fdt, fdt, newlen);
803 }
804 
805 int fdt_del_partitions(void *blob, int parent_offset)
806 {
807 	const void *prop;
808 	int ndepth = 0;
809 	int off;
810 	int ret;
811 
812 	off = fdt_next_node(blob, parent_offset, &ndepth);
813 	if (off > 0 && ndepth == 1) {
814 		prop = fdt_getprop(blob, off, "label", NULL);
815 		if (prop == NULL) {
816 			/*
817 			 * Could not find label property, nand {}; node?
818 			 * Check subnode, delete partitions there if any.
819 			 */
820 			return fdt_del_partitions(blob, off);
821 		} else {
822 			ret = fdt_del_subnodes(blob, parent_offset);
823 			if (ret < 0) {
824 				printf("Can't remove subnodes: %s\n",
825 					fdt_strerror(ret));
826 				return ret;
827 			}
828 		}
829 	}
830 	return 0;
831 }
832 
833 int fdt_node_set_part_info(void *blob, int parent_offset,
834 			   struct mtd_device *dev)
835 {
836 	struct list_head *pentry;
837 	struct part_info *part;
838 	struct reg_cell cell;
839 	int off, ndepth = 0;
840 	int part_num, ret;
841 	char buf[64];
842 
843 	ret = fdt_del_partitions(blob, parent_offset);
844 	if (ret < 0)
845 		return ret;
846 
847 	/*
848 	 * Check if it is nand {}; subnode, adjust
849 	 * the offset in this case
850 	 */
851 	off = fdt_next_node(blob, parent_offset, &ndepth);
852 	if (off > 0 && ndepth == 1)
853 		parent_offset = off;
854 
855 	part_num = 0;
856 	list_for_each_prev(pentry, &dev->parts) {
857 		int newoff;
858 
859 		part = list_entry(pentry, struct part_info, link);
860 
861 		debug("%2d: %-20s0x%08x\t0x%08x\t%d\n",
862 			part_num, part->name, part->size,
863 			part->offset, part->mask_flags);
864 
865 		sprintf(buf, "partition@%x", part->offset);
866 add_sub:
867 		ret = fdt_add_subnode(blob, parent_offset, buf);
868 		if (ret == -FDT_ERR_NOSPACE) {
869 			ret = fdt_increase_size(blob, 512);
870 			if (!ret)
871 				goto add_sub;
872 			else
873 				goto err_size;
874 		} else if (ret < 0) {
875 			printf("Can't add partition node: %s\n",
876 				fdt_strerror(ret));
877 			return ret;
878 		}
879 		newoff = ret;
880 
881 		/* Check MTD_WRITEABLE_CMD flag */
882 		if (part->mask_flags & 1) {
883 add_ro:
884 			ret = fdt_setprop(blob, newoff, "read_only", NULL, 0);
885 			if (ret == -FDT_ERR_NOSPACE) {
886 				ret = fdt_increase_size(blob, 512);
887 				if (!ret)
888 					goto add_ro;
889 				else
890 					goto err_size;
891 			} else if (ret < 0)
892 				goto err_prop;
893 		}
894 
895 		cell.r0 = cpu_to_fdt32(part->offset);
896 		cell.r1 = cpu_to_fdt32(part->size);
897 add_reg:
898 		ret = fdt_setprop(blob, newoff, "reg", &cell, sizeof(cell));
899 		if (ret == -FDT_ERR_NOSPACE) {
900 			ret = fdt_increase_size(blob, 512);
901 			if (!ret)
902 				goto add_reg;
903 			else
904 				goto err_size;
905 		} else if (ret < 0)
906 			goto err_prop;
907 
908 add_label:
909 		ret = fdt_setprop_string(blob, newoff, "label", part->name);
910 		if (ret == -FDT_ERR_NOSPACE) {
911 			ret = fdt_increase_size(blob, 512);
912 			if (!ret)
913 				goto add_label;
914 			else
915 				goto err_size;
916 		} else if (ret < 0)
917 			goto err_prop;
918 
919 		part_num++;
920 	}
921 	return 0;
922 err_size:
923 	printf("Can't increase blob size: %s\n", fdt_strerror(ret));
924 	return ret;
925 err_prop:
926 	printf("Can't add property: %s\n", fdt_strerror(ret));
927 	return ret;
928 }
929 
930 /*
931  * Update partitions in nor/nand nodes using info from
932  * mtdparts environment variable. The nodes to update are
933  * specified by node_info structure which contains mtd device
934  * type and compatible string: E. g. the board code in
935  * ft_board_setup() could use:
936  *
937  *	struct node_info nodes[] = {
938  *		{ "fsl,mpc5121-nfc",    MTD_DEV_TYPE_NAND, },
939  *		{ "cfi-flash",          MTD_DEV_TYPE_NOR,  },
940  *	};
941  *
942  *	fdt_fixup_mtdparts(blob, nodes, ARRAY_SIZE(nodes));
943  */
944 void fdt_fixup_mtdparts(void *blob, void *node_info, int node_info_size)
945 {
946 	struct node_info *ni = node_info;
947 	struct mtd_device *dev;
948 	char *parts;
949 	int i, idx;
950 	int noff;
951 
952 	parts = getenv("mtdparts");
953 	if (!parts)
954 		return;
955 
956 	if (mtdparts_init() != 0)
957 		return;
958 
959 	for (i = 0; i < node_info_size; i++) {
960 		idx = 0;
961 		noff = fdt_node_offset_by_compatible(blob, -1, ni[i].compat);
962 		while (noff != -FDT_ERR_NOTFOUND) {
963 			debug("%s: %s, mtd dev type %d\n",
964 				fdt_get_name(blob, noff, 0),
965 				ni[i].compat, ni[i].type);
966 			dev = device_find(ni[i].type, idx++);
967 			if (dev) {
968 				if (fdt_node_set_part_info(blob, noff, dev))
969 					return; /* return on error */
970 			}
971 
972 			/* Jump to next flash node */
973 			noff = fdt_node_offset_by_compatible(blob, noff,
974 							     ni[i].compat);
975 		}
976 	}
977 }
978 #endif
979 
980 void fdt_del_node_and_alias(void *blob, const char *alias)
981 {
982 	int off = fdt_path_offset(blob, alias);
983 
984 	if (off < 0)
985 		return;
986 
987 	fdt_del_node(blob, off);
988 
989 	off = fdt_path_offset(blob, "/aliases");
990 	fdt_delprop(blob, off, alias);
991 }
992