3 * Written by: Pantelis Antoniou <pantelis.antoniou@gmail.com>
4 * Updated by: Matthew McClintock <msm@freescale.com>
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License as
8 * published by the Free Software Foundation; either version 2 of
9 * the License, or (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
24 #include <environment.h>
26 #ifdef CONFIG_OF_FLAT_TREE
28 #include <asm/errno.h>
32 #include <linux/ctype.h>
36 /* align addr on a size boundary - adjust address up if needed -- Cort */
37 #define _ALIGN(addr,size) (((addr)+(size)-1)&(~((size)-1)))
38 #ifndef CONFIG_OF_BOOT_CPU
39 #define CONFIG_OF_BOOT_CPU 0
41 #define SIZE_OF_RSVMAP_ENTRY (2*sizeof(u64))
43 static void ft_put_word(struct ft_cxt *cxt, u32 v)
45 memmove(cxt->p + sizeof(u32), cxt->p, cxt->p_end - cxt->p);
47 *(u32 *) cxt->p = cpu_to_be32(v);
48 cxt->p += sizeof(u32);
49 cxt->p_end += sizeof(u32);
52 static inline void ft_put_bin(struct ft_cxt *cxt, const void *data, int sz)
54 int aligned_size = ((u8 *)_ALIGN((unsigned long)cxt->p + sz,
55 sizeof(u32))) - cxt->p;
57 memmove(cxt->p + aligned_size, cxt->p, cxt->p_end - cxt->p);
59 /* make sure the last bytes are zeroed */
60 memset(cxt->p + aligned_size - (aligned_size % sizeof(u32)), 0,
61 (aligned_size % sizeof(u32)));
63 memcpy(cxt->p, data, sz);
65 cxt->p += aligned_size;
66 cxt->p_end += aligned_size;
69 void ft_begin_node(struct ft_cxt *cxt, const char *name)
71 ft_put_word(cxt, OF_DT_BEGIN_NODE);
72 ft_put_bin(cxt, name, strlen(name) + 1);
75 void ft_end_node(struct ft_cxt *cxt)
77 ft_put_word(cxt, OF_DT_END_NODE);
80 void ft_nop(struct ft_cxt *cxt)
82 ft_put_word(cxt, OF_DT_NOP);
85 static int lookup_string(struct ft_cxt *cxt, const char *name)
90 while (p < cxt->p_end) {
91 if (strcmp((char *)p, name) == 0)
93 p += strlen((char *)p) + 1;
99 void ft_prop(struct ft_cxt *cxt, const char *name, const void *data, int sz)
103 off = lookup_string(cxt, name);
105 memcpy(cxt->p_end, name, strlen(name) + 1);
106 off = cxt->p_end - cxt->p;
107 cxt->p_end += strlen(name) + 1;
110 /* now put offset from beginning of *STRUCTURE* */
111 /* will be fixed up at the end */
112 ft_put_word(cxt, OF_DT_PROP);
113 ft_put_word(cxt, sz);
114 ft_put_word(cxt, off);
115 ft_put_bin(cxt, data, sz);
118 void ft_prop_str(struct ft_cxt *cxt, const char *name, const char *str)
120 ft_prop(cxt, name, str, strlen(str) + 1);
123 void ft_prop_int(struct ft_cxt *cxt, const char *name, int val)
125 u32 v = cpu_to_be32((u32) val);
127 ft_prop(cxt, name, &v, sizeof(u32));
130 /* pick up and start working on a tree in place */
131 void ft_init_cxt(struct ft_cxt *cxt, void *blob)
133 struct boot_param_header *bph = blob;
135 memset(cxt, 0, sizeof(*cxt));
138 bph->boot_cpuid_phys = CONFIG_OF_BOOT_CPU;
140 /* find beginning and end of reserve map table (zeros in last entry) */
141 cxt->p_rsvmap = (u8 *)bph + bph->off_mem_rsvmap;
142 while ( ((uint64_t *)cxt->p_rsvmap)[0] != 0 &&
143 ((uint64_t *)cxt->p_rsvmap)[1] != 0 ) {
144 cxt->p_rsvmap += SIZE_OF_RSVMAP_ENTRY;
147 cxt->p_start = (u8 *)bph + bph->off_dt_struct;
148 cxt->p_end = (u8 *)bph + bph->totalsize;
149 cxt->p = (u8 *)bph + bph->off_dt_strings;
152 /* add a reserver physical area to the rsvmap */
153 void ft_add_rsvmap(struct ft_cxt *cxt, u64 physstart, u64 physend)
155 memmove(cxt->p_rsvmap + SIZE_OF_RSVMAP_ENTRY, cxt->p_rsvmap,
156 cxt->p_end - cxt->p_rsvmap);
158 ((u64 *)cxt->p_rsvmap)[0] = cpu_to_be64(physstart);
159 ((u64 *)cxt->p_rsvmap)[1] = cpu_to_be64(physend);
160 ((u64 *)cxt->p_rsvmap)[2] = 0;
161 ((u64 *)cxt->p_rsvmap)[3] = 0;
163 cxt->p_rsvmap += SIZE_OF_RSVMAP_ENTRY;
164 cxt->p_start += SIZE_OF_RSVMAP_ENTRY;
165 cxt->p += SIZE_OF_RSVMAP_ENTRY;
166 cxt->p_end += SIZE_OF_RSVMAP_ENTRY;
169 void ft_end_tree(struct ft_cxt *cxt)
171 ft_put_word(cxt, OF_DT_END);
174 /* update the boot param header with correct values */
175 void ft_finalize_tree(struct ft_cxt *cxt) {
176 struct boot_param_header *bph = cxt->bph;
178 bph->totalsize = cxt->p_end - (u8 *)bph;
179 bph->off_dt_struct = cxt->p_start - (u8 *)bph;
180 bph->off_dt_strings = cxt->p - (u8 *)bph;
181 bph->dt_strings_size = cxt->p_end - cxt->p;
184 static int is_printable_string(const void *data, int len)
186 const char *s = data;
189 /* zero length is not */
193 /* must terminate with zero */
194 if (s[len - 1] != '\0')
198 while (*s && isprint(*s))
201 /* not zero, or not done yet */
202 if (*s != '\0' || (s + 1 - ss) < len)
208 static void print_data(const void *data, int len)
213 /* no data, don't print */
217 if (is_printable_string(data, len)) {
226 printf(" = <%02x>", (*(u8 *) data) & 0xff);
228 case 2: /* half-word */
229 printf(" = <%04x>", be16_to_cpu(*(u16 *) data) & 0xffff);
232 printf(" = <%x>", be32_to_cpu(*(u32 *) data) & 0xffffffffU);
234 case 8: /* double-word */
235 printf(" = <%qx>", be64_to_cpu(*(uint64_t *) data));
237 default: /* anything else... hexdump */
239 for (i = 0, s = data; i < len; i++)
240 printf("%02x%s", s[i], i < len - 1 ? " " : "");
247 void ft_dump_blob(const void *bphp)
249 const struct boot_param_header *bph = bphp;
250 const uint64_t *p_rsvmap = (const uint64_t *)
251 ((const char *)bph + be32_to_cpu(bph->off_mem_rsvmap));
252 const u32 *p_struct = (const u32 *)
253 ((const char *)bph + be32_to_cpu(bph->off_dt_struct));
254 const u32 *p_strings = (const u32 *)
255 ((const char *)bph + be32_to_cpu(bph->off_dt_strings));
259 int depth, sz, shift;
263 if (be32_to_cpu(bph->magic) != OF_DT_HEADER) {
272 addr = be64_to_cpu(p_rsvmap[i * 2]);
273 size = be64_to_cpu(p_rsvmap[i * 2 + 1]);
274 if (addr == 0 && size == 0)
277 printf("/memreserve/ %qx %qx;\n", addr, size);
281 while ((tag = be32_to_cpu(*p++)) != OF_DT_END) {
283 /* printf("tag: 0x%08x (%d)\n", tag, p - p_struct); */
285 if (tag == OF_DT_BEGIN_NODE) {
287 p = (u32 *) _ALIGN((unsigned long)p + strlen(s) + 1, 4);
289 printf("%*s%s {\n", depth * shift, "", s);
295 if (tag == OF_DT_END_NODE) {
298 printf("%*s};\n", depth * shift, "");
302 if (tag == OF_DT_NOP) {
303 printf("%*s[NOP]\n", depth * shift, "");
307 if (tag != OF_DT_PROP) {
308 fprintf(stderr, "%*s ** Unknown tag 0x%08x at 0x%x\n",
309 depth * shift, "", tag, --p);
312 sz = be32_to_cpu(*p++);
313 s = (const char *)p_strings + be32_to_cpu(*p++);
315 p = (const u32 *)_ALIGN((unsigned long)p + sz, 4);
316 printf("%*s%s", depth * shift, "", s);
322 void ft_backtrack_node(struct ft_cxt *cxt)
326 while (be32_to_cpu(*(u32 *) (cxt->p - i)) != OF_DT_END_NODE)
329 memmove (cxt->p - i, cxt->p, cxt->p_end - cxt->p);
335 void *ft_get_prop(void *bphp, const char *propname, int *szp)
337 struct boot_param_header *bph = bphp;
339 (uint32_t *) ((char *)bph + be32_to_cpu(bph->off_dt_struct));
340 uint32_t *p_strings =
341 (uint32_t *) ((char *)bph + be32_to_cpu(bph->off_dt_strings));
342 uint32_t version = be32_to_cpu(bph->version);
348 static char path[256], prop[256];
353 while ((tag = be32_to_cpu(*p++)) != OF_DT_END) {
355 if (tag == OF_DT_BEGIN_NODE) {
357 p = (uint32_t *) _ALIGN((unsigned long)p + strlen(s) +
364 if (tag == OF_DT_END_NODE) {
365 path[strlen(path) - 1] = '\0';
366 ss = strrchr(path, '/');
372 if (tag == OF_DT_NOP)
375 if (tag != OF_DT_PROP)
378 sz = be32_to_cpu(*p++);
379 s = (char *)p_strings + be32_to_cpu(*p++);
380 if (version < 0x10 && sz >= 8)
381 p = (uint32_t *) _ALIGN((unsigned long)p, 8);
383 p = (uint32_t *) _ALIGN((unsigned long)p + sz, 4);
388 if (strcmp(prop, propname) == 0) {
397 /********************************************************************/
399 void ft_setup(void *blob, bd_t * bd, ulong initrd_start, ulong initrd_end)
406 /* disable OF tree; booting old kernel */
407 if (getenv("disable_of") != NULL) {
408 memcpy(blob, bd, sizeof(*bd));
413 printf ("recieved oftree\n");
417 ft_init_cxt(&cxt, blob);
419 if (initrd_start && initrd_end)
420 ft_add_rsvmap(&cxt, initrd_start, initrd_end - initrd_start + 1);
423 ft_backtrack_node(&cxt);
425 ft_begin_node(&cxt, "chosen");
426 ft_prop_str(&cxt, "name", "chosen");
428 ft_prop_str(&cxt, "bootargs", getenv("bootargs"));
429 ft_prop_int(&cxt, "linux,platform", 0x600); /* what is this? */
430 if (initrd_start && initrd_end) {
431 ft_prop_int(&cxt, "linux,initrd-start", initrd_start);
432 ft_prop_int(&cxt, "linux,initrd-end", initrd_end);
434 #ifdef OF_STDOUT_PATH
435 ft_prop_str(&cxt, "linux,stdout-path", OF_STDOUT_PATH);
440 ft_end_node(&cxt); /* end root */
443 ft_finalize_tree(&cxt);
446 clock = bd->bi_intfreq;
447 p = ft_get_prop(blob, "/cpus/" OF_CPU "/clock-frequency", &len);
449 *p = cpu_to_be32(clock);
453 p = ft_get_prop(blob, "/cpus/" OF_CPU "/timebase-frequency", &len);
455 *p = cpu_to_be32(clock);
457 #endif /* __powerpc__ */
459 #ifdef CONFIG_OF_BOARD_SETUP
460 ft_board_setup(blob, bd);
463 /* in case the size changed in the platform code */
464 ft_finalize_tree(&cxt);
467 printf("final OF-tree\n");