blob: 6f9ce7d37c227f81f15f0127fe5f1c6d9c8c3566 [file] [log] [blame]
Simon Glass44d3a302013-05-08 08:06:00 +00001/*
2 * Copyright (c) 2013, Google Inc.
3 *
4 * (C) Copyright 2008 Semihalf
5 *
6 * (C) Copyright 2000-2006
7 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
8 *
Wolfgang Denk1a459662013-07-08 09:37:19 +02009 * SPDX-License-Identifier: GPL-2.0+
Simon Glass44d3a302013-05-08 08:06:00 +000010 */
11
12#include <common.h>
13#include <fdt_support.h>
14#include <errno.h>
15#include <image.h>
16#include <libfdt.h>
17#include <asm/io.h>
18
19#ifndef CONFIG_SYS_FDT_PAD
20#define CONFIG_SYS_FDT_PAD 0x3000
21#endif
22
23DECLARE_GLOBAL_DATA_PTR;
24
25static void fdt_error(const char *msg)
26{
27 puts("ERROR: ");
28 puts(msg);
29 puts(" - must RESET the board to recover.\n");
30}
31
32static const image_header_t *image_get_fdt(ulong fdt_addr)
33{
34 const image_header_t *fdt_hdr = map_sysmem(fdt_addr, 0);
35
36 image_print_contents(fdt_hdr);
37
38 puts(" Verifying Checksum ... ");
39 if (!image_check_hcrc(fdt_hdr)) {
40 fdt_error("fdt header checksum invalid");
41 return NULL;
42 }
43
44 if (!image_check_dcrc(fdt_hdr)) {
45 fdt_error("fdt checksum invalid");
46 return NULL;
47 }
48 puts("OK\n");
49
50 if (!image_check_type(fdt_hdr, IH_TYPE_FLATDT)) {
51 fdt_error("uImage is not a fdt");
52 return NULL;
53 }
54 if (image_get_comp(fdt_hdr) != IH_COMP_NONE) {
55 fdt_error("uImage is compressed");
56 return NULL;
57 }
Masahiro Yamada2f0877c2013-09-19 12:10:18 +090058 if (fdt_check_header((void *)image_get_data(fdt_hdr)) != 0) {
Simon Glass44d3a302013-05-08 08:06:00 +000059 fdt_error("uImage data is not a fdt");
60 return NULL;
61 }
62 return fdt_hdr;
63}
64
65/**
66 * boot_fdt_add_mem_rsv_regions - Mark the memreserve sections as unusable
67 * @lmb: pointer to lmb handle, will be used for memory mgmt
68 * @fdt_blob: pointer to fdt blob base address
69 *
70 * Adds the memreserve regions in the dtb to the lmb block. Adding the
71 * memreserve regions prevents u-boot from using them to store the initrd
72 * or the fdt blob.
73 */
74void boot_fdt_add_mem_rsv_regions(struct lmb *lmb, void *fdt_blob)
75{
76 uint64_t addr, size;
77 int i, total;
78
79 if (fdt_check_header(fdt_blob) != 0)
80 return;
81
82 total = fdt_num_mem_rsv(fdt_blob);
83 for (i = 0; i < total; i++) {
84 if (fdt_get_mem_rsv(fdt_blob, i, &addr, &size) != 0)
85 continue;
86 printf(" reserving fdt memory region: addr=%llx size=%llx\n",
87 (unsigned long long)addr, (unsigned long long)size);
88 lmb_reserve(lmb, addr, size);
89 }
90}
91
92/**
93 * boot_relocate_fdt - relocate flat device tree
94 * @lmb: pointer to lmb handle, will be used for memory mgmt
95 * @of_flat_tree: pointer to a char* variable, will hold fdt start address
96 * @of_size: pointer to a ulong variable, will hold fdt length
97 *
98 * boot_relocate_fdt() allocates a region of memory within the bootmap and
99 * relocates the of_flat_tree into that region, even if the fdt is already in
100 * the bootmap. It also expands the size of the fdt by CONFIG_SYS_FDT_PAD
101 * bytes.
102 *
103 * of_flat_tree and of_size are set to final (after relocation) values
104 *
105 * returns:
106 * 0 - success
107 * 1 - failure
108 */
109int boot_relocate_fdt(struct lmb *lmb, char **of_flat_tree, ulong *of_size)
110{
111 void *fdt_blob = *of_flat_tree;
112 void *of_start = NULL;
113 char *fdt_high;
114 ulong of_len = 0;
115 int err;
116 int disable_relocation = 0;
117
118 /* nothing to do */
119 if (*of_size == 0)
120 return 0;
121
122 if (fdt_check_header(fdt_blob) != 0) {
123 fdt_error("image is not a fdt");
124 goto error;
125 }
126
127 /* position on a 4K boundary before the alloc_current */
128 /* Pad the FDT by a specified amount */
129 of_len = *of_size + CONFIG_SYS_FDT_PAD;
130
131 /* If fdt_high is set use it to select the relocation address */
132 fdt_high = getenv("fdt_high");
133 if (fdt_high) {
134 void *desired_addr = (void *)simple_strtoul(fdt_high, NULL, 16);
135
136 if (((ulong) desired_addr) == ~0UL) {
137 /* All ones means use fdt in place */
138 of_start = fdt_blob;
139 lmb_reserve(lmb, (ulong)of_start, of_len);
140 disable_relocation = 1;
141 } else if (desired_addr) {
142 of_start =
143 (void *)(ulong) lmb_alloc_base(lmb, of_len, 0x1000,
144 (ulong)desired_addr);
145 if (of_start == NULL) {
146 puts("Failed using fdt_high value for Device Tree");
147 goto error;
148 }
149 } else {
150 of_start =
151 (void *)(ulong) lmb_alloc(lmb, of_len, 0x1000);
152 }
153 } else {
154 of_start =
155 (void *)(ulong) lmb_alloc_base(lmb, of_len, 0x1000,
156 getenv_bootm_mapsize()
157 + getenv_bootm_low());
158 }
159
160 if (of_start == NULL) {
161 puts("device tree - allocation error\n");
162 goto error;
163 }
164
165 if (disable_relocation) {
166 /*
167 * We assume there is space after the existing fdt to use
168 * for padding
169 */
170 fdt_set_totalsize(of_start, of_len);
171 printf(" Using Device Tree in place at %p, end %p\n",
172 of_start, of_start + of_len - 1);
173 } else {
174 debug("## device tree at %p ... %p (len=%ld [0x%lX])\n",
175 fdt_blob, fdt_blob + *of_size - 1, of_len, of_len);
176
177 printf(" Loading Device Tree to %p, end %p ... ",
178 of_start, of_start + of_len - 1);
179
180 err = fdt_open_into(fdt_blob, of_start, of_len);
181 if (err != 0) {
182 fdt_error("fdt move failed");
183 goto error;
184 }
185 puts("OK\n");
186 }
187
188 *of_flat_tree = of_start;
189 *of_size = of_len;
190
191 set_working_fdt_addr(*of_flat_tree);
192 return 0;
193
194error:
195 return 1;
196}
197
Simon Glass44d3a302013-05-08 08:06:00 +0000198/**
199 * boot_get_fdt - main fdt handling routine
200 * @argc: command argument count
201 * @argv: command argument list
Simon Glass53f375f2013-05-16 13:53:23 +0000202 * @arch: architecture (IH_ARCH_...)
Simon Glass44d3a302013-05-08 08:06:00 +0000203 * @images: pointer to the bootm images structure
204 * @of_flat_tree: pointer to a char* variable, will hold fdt start address
205 * @of_size: pointer to a ulong variable, will hold fdt length
206 *
207 * boot_get_fdt() is responsible for finding a valid flat device tree image.
208 * Curently supported are the following ramdisk sources:
209 * - multicomponent kernel/ramdisk image,
210 * - commandline provided address of decicated ramdisk image.
211 *
212 * returns:
213 * 0, if fdt image was found and valid, or skipped
214 * of_flat_tree and of_size are set to fdt start address and length if
215 * fdt image is found and valid
216 *
217 * 1, if fdt image is found but corrupted
218 * of_flat_tree and of_size are set to 0 if no fdt exists
219 */
Simon Glass53f375f2013-05-16 13:53:23 +0000220int boot_get_fdt(int flag, int argc, char * const argv[], uint8_t arch,
Simon Glass44d3a302013-05-08 08:06:00 +0000221 bootm_headers_t *images, char **of_flat_tree, ulong *of_size)
222{
223 const image_header_t *fdt_hdr;
224 ulong fdt_addr;
225 char *fdt_blob = NULL;
226 ulong image_start, image_data, image_end;
Simon Glass53f375f2013-05-16 13:53:23 +0000227 ulong load, load_end;
Simon Glass44d3a302013-05-08 08:06:00 +0000228 void *buf;
229#if defined(CONFIG_FIT)
Simon Glassf320a4d2013-07-10 23:08:10 -0700230 const char *fit_uname_config = images->fit_uname_cfg;
Simon Glass44d3a302013-05-08 08:06:00 +0000231 const char *fit_uname_fdt = NULL;
232 ulong default_addr;
Simon Glass44d3a302013-05-08 08:06:00 +0000233 int fdt_noffset;
Simon Glass44d3a302013-05-08 08:06:00 +0000234#endif
Simon Glass983c72f2013-06-11 11:14:46 -0700235 const char *select = NULL;
Simon Glass44d3a302013-05-08 08:06:00 +0000236
237 *of_flat_tree = NULL;
238 *of_size = 0;
239
Simon Glass983c72f2013-06-11 11:14:46 -0700240 if (argc > 2)
241 select = argv[2];
242 if (select || genimg_has_config(images)) {
Simon Glass44d3a302013-05-08 08:06:00 +0000243#if defined(CONFIG_FIT)
Simon Glass983c72f2013-06-11 11:14:46 -0700244 if (select) {
Simon Glass44d3a302013-05-08 08:06:00 +0000245 /*
246 * If the FDT blob comes from the FIT image and the
247 * FIT image address is omitted in the command line
248 * argument, try to use ramdisk or os FIT image
249 * address or default load address.
250 */
251 if (images->fit_uname_rd)
252 default_addr = (ulong)images->fit_hdr_rd;
253 else if (images->fit_uname_os)
254 default_addr = (ulong)images->fit_hdr_os;
255 else
256 default_addr = load_addr;
257
Simon Glass983c72f2013-06-11 11:14:46 -0700258 if (fit_parse_conf(select, default_addr,
Simon Glass44d3a302013-05-08 08:06:00 +0000259 &fdt_addr, &fit_uname_config)) {
260 debug("* fdt: config '%s' from image at 0x%08lx\n",
261 fit_uname_config, fdt_addr);
Simon Glass983c72f2013-06-11 11:14:46 -0700262 } else if (fit_parse_subimage(select, default_addr,
Simon Glass44d3a302013-05-08 08:06:00 +0000263 &fdt_addr, &fit_uname_fdt)) {
264 debug("* fdt: subimage '%s' from image at 0x%08lx\n",
265 fit_uname_fdt, fdt_addr);
266 } else
267#endif
268 {
Simon Glass983c72f2013-06-11 11:14:46 -0700269 fdt_addr = simple_strtoul(select, NULL, 16);
Simon Glass44d3a302013-05-08 08:06:00 +0000270 debug("* fdt: cmdline image address = 0x%08lx\n",
271 fdt_addr);
272 }
273#if defined(CONFIG_FIT)
274 } else {
275 /* use FIT configuration provided in first bootm
276 * command argument
277 */
278 fdt_addr = map_to_sysmem(images->fit_hdr_os);
Simon Glass53f375f2013-05-16 13:53:23 +0000279 fdt_noffset = fit_get_node_from_config(images,
280 FIT_FDT_PROP,
281 fdt_addr);
282 if (fdt_noffset == -ENOLINK)
Simon Glass44d3a302013-05-08 08:06:00 +0000283 return 0;
Simon Glass53f375f2013-05-16 13:53:23 +0000284 else if (fdt_noffset < 0)
285 return 1;
Simon Glass44d3a302013-05-08 08:06:00 +0000286 }
287#endif
Simon Glass44d3a302013-05-08 08:06:00 +0000288 debug("## Checking for 'FDT'/'FDT Image' at %08lx\n",
289 fdt_addr);
290
291 /* copy from dataflash if needed */
292 fdt_addr = genimg_get_image(fdt_addr);
293
294 /*
295 * Check if there is an FDT image at the
296 * address provided in the second bootm argument
297 * check image type, for FIT images get a FIT node.
298 */
299 buf = map_sysmem(fdt_addr, 0);
300 switch (genimg_get_format(buf)) {
301 case IMAGE_FORMAT_LEGACY:
302 /* verify fdt_addr points to a valid image header */
303 printf("## Flattened Device Tree from Legacy Image at %08lx\n",
304 fdt_addr);
305 fdt_hdr = image_get_fdt(fdt_addr);
306 if (!fdt_hdr)
307 goto error;
308
309 /*
310 * move image data to the load address,
311 * make sure we don't overwrite initial image
312 */
313 image_start = (ulong)fdt_hdr;
314 image_data = (ulong)image_get_data(fdt_hdr);
315 image_end = image_get_image_end(fdt_hdr);
316
Simon Glass53f375f2013-05-16 13:53:23 +0000317 load = image_get_load(fdt_hdr);
318 load_end = load + image_get_data_size(fdt_hdr);
Simon Glass44d3a302013-05-08 08:06:00 +0000319
Simon Glass53f375f2013-05-16 13:53:23 +0000320 if (load == image_start ||
321 load == image_data) {
Simon Glass44d3a302013-05-08 08:06:00 +0000322 fdt_blob = (char *)image_data;
323 break;
324 }
325
Simon Glass53f375f2013-05-16 13:53:23 +0000326 if ((load < image_end) && (load_end > image_start)) {
Simon Glass44d3a302013-05-08 08:06:00 +0000327 fdt_error("fdt overwritten");
328 goto error;
329 }
330
331 debug(" Loading FDT from 0x%08lx to 0x%08lx\n",
Simon Glass53f375f2013-05-16 13:53:23 +0000332 image_data, load);
Simon Glass44d3a302013-05-08 08:06:00 +0000333
Simon Glass53f375f2013-05-16 13:53:23 +0000334 memmove((void *)load,
Simon Glass44d3a302013-05-08 08:06:00 +0000335 (void *)image_data,
336 image_get_data_size(fdt_hdr));
337
Simon Glass53f375f2013-05-16 13:53:23 +0000338 fdt_addr = load;
Simon Glass44d3a302013-05-08 08:06:00 +0000339 break;
340 case IMAGE_FORMAT_FIT:
341 /*
342 * This case will catch both: new uImage format
343 * (libfdt based) and raw FDT blob (also libfdt
344 * based).
345 */
346#if defined(CONFIG_FIT)
347 /* check FDT blob vs FIT blob */
348 if (fit_check_format(buf)) {
Simon Glass53f375f2013-05-16 13:53:23 +0000349 ulong load, len;
Simon Glass44d3a302013-05-08 08:06:00 +0000350
Simon Glass53f375f2013-05-16 13:53:23 +0000351 fdt_noffset = fit_image_load(images,
352 FIT_FDT_PROP,
353 fdt_addr, &fit_uname_fdt,
Simon Glassf320a4d2013-07-10 23:08:10 -0700354 &fit_uname_config,
Simon Glass53f375f2013-05-16 13:53:23 +0000355 arch, IH_TYPE_FLATDT,
356 BOOTSTAGE_ID_FIT_FDT_START,
357 FIT_LOAD_OPTIONAL, &load, &len);
Simon Glass44d3a302013-05-08 08:06:00 +0000358
Simon Glass53f375f2013-05-16 13:53:23 +0000359 images->fit_hdr_fdt = map_sysmem(fdt_addr, 0);
Simon Glass44d3a302013-05-08 08:06:00 +0000360 images->fit_uname_fdt = fit_uname_fdt;
361 images->fit_noffset_fdt = fdt_noffset;
Simon Glass53f375f2013-05-16 13:53:23 +0000362 fdt_addr = load;
Simon Glass44d3a302013-05-08 08:06:00 +0000363 break;
364 } else
365#endif
366 {
367 /*
368 * FDT blob
369 */
Simon Glass44d3a302013-05-08 08:06:00 +0000370 debug("* fdt: raw FDT blob\n");
371 printf("## Flattened Device Tree blob at %08lx\n",
372 (long)fdt_addr);
373 }
374 break;
375 default:
376 puts("ERROR: Did not find a cmdline Flattened Device Tree\n");
377 goto error;
378 }
379
Simon Glass53f375f2013-05-16 13:53:23 +0000380 printf(" Booting using the fdt blob at %#08lx\n", fdt_addr);
381 fdt_blob = map_sysmem(fdt_addr, 0);
Simon Glass44d3a302013-05-08 08:06:00 +0000382 } else if (images->legacy_hdr_valid &&
383 image_check_type(&images->legacy_hdr_os_copy,
384 IH_TYPE_MULTI)) {
385 ulong fdt_data, fdt_len;
386
387 /*
388 * Now check if we have a legacy multi-component image,
389 * get second entry data start address and len.
390 */
391 printf("## Flattened Device Tree from multi component Image at %08lX\n",
392 (ulong)images->legacy_hdr_os);
393
394 image_multi_getimg(images->legacy_hdr_os, 2, &fdt_data,
395 &fdt_len);
396 if (fdt_len) {
397 fdt_blob = (char *)fdt_data;
398 printf(" Booting using the fdt at 0x%p\n", fdt_blob);
399
400 if (fdt_check_header(fdt_blob) != 0) {
401 fdt_error("image is not a fdt");
402 goto error;
403 }
404
405 if (fdt_totalsize(fdt_blob) != fdt_len) {
406 fdt_error("fdt size != image size");
407 goto error;
408 }
409 } else {
410 debug("## No Flattened Device Tree\n");
411 return 0;
412 }
413 } else {
414 debug("## No Flattened Device Tree\n");
415 return 0;
416 }
417
418 *of_flat_tree = fdt_blob;
419 *of_size = fdt_totalsize(fdt_blob);
420 debug(" of_flat_tree at 0x%08lx size 0x%08lx\n",
421 (ulong)*of_flat_tree, *of_size);
422
423 return 0;
424
425error:
426 *of_flat_tree = NULL;
427 *of_size = 0;
428 return 1;
429}
Simon Glass13d06982013-05-08 08:06:01 +0000430
431/*
432 * Verify the device tree.
433 *
434 * This function is called after all device tree fix-ups have been enacted,
435 * so that the final device tree can be verified. The definition of "verified"
436 * is up to the specific implementation. However, it generally means that the
437 * addresses of some of the devices in the device tree are compared with the
438 * actual addresses at which U-Boot has placed them.
439 *
440 * Returns 1 on success, 0 on failure. If 0 is returned, U-boot will halt the
441 * boot process.
442 */
443__weak int ft_verify_fdt(void *fdt)
444{
445 return 1;
446}
447
448__weak int arch_fixup_memory_node(void *blob)
449{
450 return 0;
451}
452
453int image_setup_libfdt(bootm_headers_t *images, void *blob,
454 int of_size, struct lmb *lmb)
455{
456 ulong *initrd_start = &images->initrd_start;
457 ulong *initrd_end = &images->initrd_end;
458 int ret;
459
460 if (fdt_chosen(blob, 1) < 0) {
461 puts("ERROR: /chosen node create failed");
462 puts(" - must RESET the board to recover.\n");
463 return -1;
464 }
465 arch_fixup_memory_node(blob);
466 if (IMAAGE_OF_BOARD_SETUP)
467 ft_board_setup(blob, gd->bd);
468 fdt_fixup_ethernet(blob);
469
470 /* Delete the old LMB reservation */
471 lmb_free(lmb, (phys_addr_t)(u32)(uintptr_t)blob,
472 (phys_size_t)fdt_totalsize(blob));
473
474 ret = fdt_resize(blob);
475 if (ret < 0)
476 return ret;
477 of_size = ret;
478
479 if (*initrd_start && *initrd_end) {
480 of_size += FDT_RAMDISK_OVERHEAD;
481 fdt_set_totalsize(blob, of_size);
482 }
483 /* Create a new LMB reservation */
484 lmb_reserve(lmb, (ulong)blob, of_size);
485
486 fdt_initrd(blob, *initrd_start, *initrd_end, 1);
487 if (!ft_verify_fdt(blob))
488 return -1;
489
490 return 0;
491}