7 #include <environment.h>
9 #ifdef CONFIG_OF_FLAT_TREE
11 #include <asm/errno.h>
16 /* align addr on a size boundary - adjust address up if needed -- Cort */
17 #define _ALIGN(addr,size) (((addr)+(size)-1)&(~((size)-1)))
19 static void ft_put_word(struct ft_cxt *cxt, u32 v)
21 if (cxt->overflow) /* do nothing */
24 /* check for overflow */
25 if (cxt->p + 4 > cxt->pstr) {
30 *(u32 *) cxt->p = cpu_to_be32(v);
34 static inline void ft_put_bin(struct ft_cxt *cxt, const void *data, int sz)
38 if (cxt->overflow) /* do nothing */
41 /* next pointer pos */
42 p = (u8 *) _ALIGN((unsigned long)cxt->p + sz, 4);
44 /* check for overflow */
50 memcpy(cxt->p, data, sz);
52 memset(cxt->p + sz, 0, 4 - (sz & 3));
56 void ft_begin_node(struct ft_cxt *cxt, const char *name)
58 ft_put_word(cxt, OF_DT_BEGIN_NODE);
59 ft_put_bin(cxt, name, strlen(name) + 1);
62 void ft_end_node(struct ft_cxt *cxt)
64 ft_put_word(cxt, OF_DT_END_NODE);
67 void ft_nop(struct ft_cxt *cxt)
69 ft_put_word(cxt, OF_DT_NOP);
72 static int lookup_string(struct ft_cxt *cxt, const char *name)
77 while (p < cxt->pstr_begin) {
78 if (strcmp(p, name) == 0)
79 return p - cxt->p_begin;
86 void ft_prop(struct ft_cxt *cxt, const char *name, const void *data, int sz)
93 len = strlen(name) + 1;
95 off = lookup_string(cxt, name);
97 /* check if we have space */
98 if (cxt->p + 12 + sz + len > cxt->pstr) {
104 memcpy(cxt->pstr, name, len);
105 off = cxt->pstr - cxt->p_begin;
108 /* now put offset from beginning of *STRUCTURE* */
109 /* will be fixed up at the end */
110 ft_put_word(cxt, OF_DT_PROP);
111 ft_put_word(cxt, sz);
112 ft_put_word(cxt, off);
113 ft_put_bin(cxt, data, sz);
116 void ft_prop_str(struct ft_cxt *cxt, const char *name, const char *str)
118 ft_prop(cxt, name, str, strlen(str) + 1);
121 void ft_prop_int(struct ft_cxt *cxt, const char *name, int val)
123 u32 v = cpu_to_be32((u32) val);
125 ft_prop(cxt, name, &v, 4);
128 /* start construction of the flat OF tree */
129 void ft_begin(struct ft_cxt *cxt, void *blob, int max_size)
131 struct boot_param_header *bph = blob;
135 memset(cxt, 0, sizeof(*cxt));
138 cxt->max_size = max_size;
140 /* zero everything in the header area */
141 memset(bph, 0, sizeof(*bph));
143 bph->magic = cpu_to_be32(OF_DT_HEADER);
144 bph->version = cpu_to_be32(0x10);
145 bph->last_comp_version = cpu_to_be32(0x10);
148 cxt->pres_begin = (u8 *) _ALIGN((unsigned long)(bph + 1), 8);
149 cxt->pres = cxt->pres_begin;
151 off = (unsigned long)cxt->pres_begin - (unsigned long)bph;
152 bph->off_mem_rsvmap = cpu_to_be32(off);
154 ((u64 *) cxt->pres)[0] = 0; /* phys = 0, size = 0, terminate */
155 ((u64 *) cxt->pres)[1] = 0;
157 cxt->p_anchor = cxt->pres + 16; /* over the terminator */
160 /* add a reserver physical area to the rsvmap */
161 void ft_add_rsvmap(struct ft_cxt *cxt, u64 physaddr, u64 size)
163 ((u64 *) cxt->pres)[0] = cpu_to_be64(physaddr); /* phys = 0, size = 0, terminate */
164 ((u64 *) cxt->pres)[1] = cpu_to_be64(size);
166 cxt->pres += 18; /* advance */
168 ((u64 *) cxt->pres)[0] = 0; /* phys = 0, size = 0, terminate */
169 ((u64 *) cxt->pres)[1] = 0;
171 /* keep track of size */
172 cxt->res_size = cxt->pres + 16 - cxt->pres_begin;
174 cxt->p_anchor = cxt->pres + 16; /* over the terminator */
177 void ft_begin_tree(struct ft_cxt *cxt)
179 cxt->p_begin = cxt->p_anchor;
180 cxt->pstr_begin = (char *)cxt->bph + cxt->max_size; /* point at the end */
182 cxt->p = cxt->p_begin;
183 cxt->pstr = cxt->pstr_begin;
186 int ft_end_tree(struct ft_cxt *cxt)
188 struct boot_param_header *bph = cxt->bph;
193 ft_put_word(cxt, OF_DT_END);
198 /* size of the areas */
199 cxt->struct_size = cxt->p - cxt->p_begin;
200 cxt->strings_size = cxt->pstr_begin - cxt->pstr;
202 /* the offset we must move */
203 off = (cxt->pstr_begin - cxt->p_begin) - cxt->strings_size;
205 /* the new strings start */
206 cxt->pstr_begin = cxt->p_begin + cxt->struct_size;
208 /* move the whole string area */
209 memmove(cxt->pstr_begin, cxt->pstr, cxt->strings_size);
211 /* now perform the fixup of the strings */
213 while ((tag = be32_to_cpu(*(u32 *) p)) != OF_DT_END) {
216 if (tag == OF_DT_BEGIN_NODE) {
217 p = (u8 *) _ALIGN((unsigned long)p + strlen(p) + 1, 4);
221 if (tag == OF_DT_END_NODE || tag == OF_DT_NOP)
224 if (tag != OF_DT_PROP)
227 sz = be32_to_cpu(*(u32 *) p);
230 v = be32_to_cpu(*(u32 *) p);
232 *(u32 *) p = cpu_to_be32(v); /* move down */
235 p = (u8 *) _ALIGN((unsigned long)p + sz, 4);
239 p = (char *)cxt->bph;
240 sz = (cxt->pstr_begin + cxt->strings_size) - p;
241 sz1 = _ALIGN(sz, 16); /* align at 16 bytes */
243 memset(p + sz, 0, sz1 - sz);
244 bph->totalsize = cpu_to_be32(sz1);
245 bph->off_dt_struct = cpu_to_be32(cxt->p_begin - p);
246 bph->off_dt_strings = cpu_to_be32(cxt->pstr_begin - p);
248 /* the new strings start */
249 cxt->pstr_begin = cxt->p_begin + cxt->struct_size;
250 cxt->pstr = cxt->pstr_begin + cxt->strings_size;
255 /**********************************************************************/
257 static inline int isprint(int c)
259 return c >= 0x20 && c <= 0x7e;
262 static int is_printable_string(const void *data, int len)
264 const char *s = data;
267 /* zero length is not */
271 /* must terminate with zero */
272 if (s[len - 1] != '\0')
276 while (*s && isprint(*s))
279 /* not zero, or not done yet */
280 if (*s != '\0' || (s + 1 - ss) < len)
286 static void print_data(const void *data, int len)
291 /* no data, don't print */
295 if (is_printable_string(data, len)) {
296 printf(" = \"%s\"", (char *)data);
302 printf(" = <0x%02x>", (*(u8 *) data) & 0xff);
304 case 2: /* half-word */
305 printf(" = <0x%04x>", be16_to_cpu(*(u16 *) data) & 0xffff);
308 printf(" = <0x%08x>", be32_to_cpu(*(u32 *) data) & 0xffffffffU);
310 case 8: /* double-word */
311 printf(" = <0x%16llx>", be64_to_cpu(*(uint64_t *) data));
313 default: /* anything else... hexdump */
315 for (i = 0, s = data; i < len; i++)
316 printf("%02x%s", s[i], i < len - 1 ? " " : "");
323 void ft_dump_blob(const void *bphp)
325 const struct boot_param_header *bph = bphp;
326 const uint64_t *p_rsvmap = (const uint64_t *)
327 ((const char *)bph + be32_to_cpu(bph->off_mem_rsvmap));
328 const u32 *p_struct = (const u32 *)
329 ((const char *)bph + be32_to_cpu(bph->off_dt_struct));
330 const u32 *p_strings = (const u32 *)
331 ((const char *)bph + be32_to_cpu(bph->off_dt_strings));
335 int depth, sz, shift;
339 if (be32_to_cpu(bph->magic) != OF_DT_HEADER) {
348 addr = be64_to_cpu(p_rsvmap[i * 2]);
349 size = be64_to_cpu(p_rsvmap[i * 2 + 1]);
350 if (addr == 0 && size == 0)
353 printf("/memreserve/ 0x%llx 0x%llx;\n", addr, size);
357 while ((tag = be32_to_cpu(*p++)) != OF_DT_END) {
359 /* printf("tag: 0x%08x (%d)\n", tag, p - p_struct); */
361 if (tag == OF_DT_BEGIN_NODE) {
363 p = (u32 *) _ALIGN((unsigned long)p + strlen(s) + 1, 4);
365 printf("%*s%s {\n", depth * shift, "", s);
371 if (tag == OF_DT_END_NODE) {
374 printf("%*s};\n", depth * shift, "");
378 if (tag == OF_DT_NOP) {
379 printf("%*s[NOP]\n", depth * shift, "");
383 if (tag != OF_DT_PROP) {
384 fprintf(stderr, "%*s ** Unknown tag 0x%08x\n",
385 depth * shift, "", tag);
388 sz = be32_to_cpu(*p++);
389 s = (const char *)p_strings + be32_to_cpu(*p++);
391 p = (const u32 *)_ALIGN((unsigned long)p + sz, 4);
392 printf("%*s%s", depth * shift, "", s);
398 void ft_backtrack_node(struct ft_cxt *cxt)
400 if (be32_to_cpu(*(u32 *) (cxt->p - 4)) != OF_DT_END_NODE)
401 return; /* XXX only for node */
406 /* note that the root node of the blob is "peeled" off */
407 void ft_merge_blob(struct ft_cxt *cxt, void *blob)
409 struct boot_param_header *bph = (struct boot_param_header *)blob;
410 u32 *p_struct = (u32 *) ((char *)bph + be32_to_cpu(bph->off_dt_struct));
412 (u32 *) ((char *)bph + be32_to_cpu(bph->off_dt_strings));
417 if (be32_to_cpu(*(u32 *) (cxt->p - 4)) != OF_DT_END_NODE)
418 return; /* XXX only for node */
424 while ((tag = be32_to_cpu(*p++)) != OF_DT_END) {
426 /* printf("tag: 0x%08x (%d) - %d\n", tag, p - p_struct, depth); */
428 if (tag == OF_DT_BEGIN_NODE) {
430 p = (u32 *) _ALIGN((unsigned long)p + strlen(s) + 1, 4);
433 ft_begin_node(cxt, s);
438 if (tag == OF_DT_END_NODE) {
445 if (tag == OF_DT_NOP)
448 if (tag != OF_DT_PROP)
451 sz = be32_to_cpu(*p++);
452 s = (char *)p_strings + be32_to_cpu(*p++);
454 p = (u32 *) _ALIGN((unsigned long)p + sz, 4);
456 ft_prop(cxt, s, t, sz);
460 void *ft_get_prop(void *bphp, const char *propname, int *szp)
462 struct boot_param_header *bph = bphp;
464 (uint32_t *) ((char *)bph + be32_to_cpu(bph->off_dt_struct));
465 uint32_t *p_strings =
466 (uint32_t *) ((char *)bph + be32_to_cpu(bph->off_dt_strings));
467 uint32_t version = be32_to_cpu(bph->version);
473 static char path[256], prop[256];
478 while ((tag = be32_to_cpu(*p++)) != OF_DT_END) {
480 if (tag == OF_DT_BEGIN_NODE) {
482 p = (uint32_t *) _ALIGN((unsigned long)p + strlen(s) +
489 if (tag == OF_DT_END_NODE) {
490 path[strlen(path) - 1] = '\0';
491 ss = strrchr(path, '/');
497 if (tag == OF_DT_NOP)
500 if (tag != OF_DT_PROP)
503 sz = be32_to_cpu(*p++);
504 s = (char *)p_strings + be32_to_cpu(*p++);
505 if (version < 0x10 && sz >= 8)
506 p = (uint32_t *) _ALIGN((unsigned long)p, 8);
508 p = (uint32_t *) _ALIGN((unsigned long)p + sz, 4);
513 if (strcmp(prop, propname) == 0) {
522 /********************************************************************/
524 extern unsigned char oftree_dtb[];
525 extern unsigned int oftree_dtb_len;
527 /* Function that returns a character from the environment */
528 extern uchar(*env_get_char) (int);
530 #define BDM(x) { .name = #x, .offset = offsetof(bd_t, bi_ ##x ) }
532 static const struct {
543 #if defined(CONFIG_5xx) || defined(CONFIG_8xx) || defined(CONFIG_8260) \
544 || defined(CONFIG_E500)
547 #if defined(CONFIG_MPC5xxx)
550 #if defined(CONFIG_MPC83XX)
553 #if defined(CONFIG_MPC8220)
571 #if defined(CONFIG_MPC5xxx)
578 void ft_setup(void *blob, int size, bd_t * bd)
580 DECLARE_GLOBAL_DATA_PTR;
586 static char tmpenv[256];
587 char *s, *lval, *rval;
591 /* disable OF tree; booting old kernel */
592 if (getenv("disable_of") != NULL) {
593 memcpy(blob, bd, sizeof(*bd));
597 ft_begin(&cxt, blob, size);
599 /* fs_add_rsvmap not used */
603 ft_begin_node(&cxt, "");
608 ft_merge_blob(&cxt, oftree_dtb);
611 ft_backtrack_node(&cxt);
613 ft_begin_node(&cxt, "u-boot-env");
615 for (i = 0; env_get_char(i) != '\0'; i = nxt + 1) {
616 for (nxt = i; env_get_char(nxt) != '\0'; ++nxt) ;
618 for (k = i; k < nxt && s < &tmpenv[sizeof(tmpenv) - 1]; ++k)
619 *s++ = env_get_char(k);
622 s = strchr(tmpenv, '=');
628 ft_prop_str(&cxt, lval, rval);
633 ft_begin_node(&cxt, "chosen");
635 ft_prop_str(&cxt, "name", "chosen");
636 ft_prop_str(&cxt, "bootargs", getenv("bootargs"));
637 ft_prop_int(&cxt, "linux,platform", 0x600); /* what is this? */
641 ft_end_node(&cxt); /* end root */
646 printf("merged OF-tree\n");
650 /* paste the bd_t at the end of the flat tree */
652 be32_to_cpu(((struct boot_param_header *)blob)->totalsize);
653 memcpy(end, bd, sizeof(*bd));
657 for (i = 0; i < sizeof(bd_map)/sizeof(bd_map[0]); i++) {
658 sprintf(tmpenv, "/bd_t/%s", bd_map[i].name);
659 v = *(uint32_t *)((char *)bd + bd_map[i].offset);
661 p = ft_get_prop(blob, tmpenv, &len);
666 p = ft_get_prop(blob, "/bd_t/enetaddr", &len);
668 memcpy(p, bd->bi_enetaddr, 6);
670 p = ft_get_prop(blob, "/bd_t/ethspeed", &len);
672 *p = cpu_to_be32((uint32_t) bd->bi_ethspeed);
674 clock = bd->bi_intfreq;
675 p = ft_get_prop(blob, "/cpus/" OF_CPU "/clock-frequency", &len);
677 *p = cpu_to_be32(clock);
681 p = ft_get_prop(blob, "/cpus/" OF_CPU "/timebase-frequency", &len);
683 *p = cpu_to_be32(OF_TBCLK);
686 #endif /* __powerpc__ */
689 printf("final OF-tree\n");