2 * Copyright (c) 2011, Google Inc. All rights reserved.
4 * See file CREDITS for list of people who contributed to this
7 * This program is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License as
9 * published by the Free Software Foundation; either version 2 of
10 * the License, or (at your option) any later version.
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
25 * This module records the progress of boot and arbitrary commands, and
26 * permits accurate timestamping of each.
28 * TBD: Pass timings to kernel in the FDT
34 DECLARE_GLOBAL_DATA_PTR;
36 struct bootstage_record {
40 int flags; /* see enum bootstage_flags */
44 static struct bootstage_record record[BOOTSTAGE_ID_COUNT] = { {1} };
45 static int next_id = BOOTSTAGE_ID_USER;
48 BOOTSTAGE_VERSION = 0,
49 BOOTSTAGE_MAGIC = 0xb00757a3,
52 struct bootstage_hdr {
53 uint32_t version; /* BOOTSTAGE_VERSION */
54 uint32_t count; /* Number of records */
55 uint32_t size; /* Total data size (non-zero if valid) */
56 uint32_t magic; /* Unused */
59 ulong bootstage_add_record(enum bootstage_id id, const char *name,
60 int flags, ulong mark)
62 struct bootstage_record *rec;
64 if (flags & BOOTSTAGEF_ALLOC)
67 if (id < BOOTSTAGE_ID_COUNT) {
70 /* Only record the first event for each */
79 /* Tell the board about this progress */
80 show_boot_progress(flags & BOOTSTAGEF_ERROR ? -id : id);
85 ulong bootstage_mark(enum bootstage_id id)
87 return bootstage_add_record(id, NULL, 0, timer_get_boot_us());
90 ulong bootstage_error(enum bootstage_id id)
92 return bootstage_add_record(id, NULL, BOOTSTAGEF_ERROR,
96 ulong bootstage_mark_name(enum bootstage_id id, const char *name)
100 if (id == BOOTSTAGE_ID_ALLOC)
101 flags = BOOTSTAGEF_ALLOC;
102 return bootstage_add_record(id, name, flags, timer_get_boot_us());
105 uint32_t bootstage_start(enum bootstage_id id, const char *name)
107 struct bootstage_record *rec = &record[id];
109 rec->start_us = timer_get_boot_us();
111 return rec->start_us;
114 uint32_t bootstage_accum(enum bootstage_id id)
116 struct bootstage_record *rec = &record[id];
119 duration = (uint32_t)timer_get_boot_us() - rec->start_us;
120 rec->time_us += duration;
124 static void print_time(unsigned long us_time)
129 /* We don't seem to have %'d in U-Boot */
130 sprintf(str, "%12lu", us_time);
131 for (s = str + 3; *s; s += grab) {
133 putc(s[-1] != ' ' ? ',' : ' ');
134 printf("%.*s", grab, s);
140 * Get a record name as a printable string
142 * @param buf Buffer to put name if needed
143 * @param len Length of buffer
144 * @param rec Boot stage record to get the name from
145 * @return pointer to name, either from the record or pointing to buf.
147 static const char *get_record_name(char *buf, int len,
148 struct bootstage_record *rec)
152 else if (rec->id >= BOOTSTAGE_ID_USER)
153 snprintf(buf, len, "user_%d", rec->id - BOOTSTAGE_ID_USER);
155 snprintf(buf, len, "id=%d", rec->id);
160 static uint32_t print_time_record(enum bootstage_id id,
161 struct bootstage_record *rec, uint32_t prev)
167 print_time(rec->time_us);
169 print_time(rec->time_us);
170 print_time(rec->time_us - prev);
172 printf(" %s\n", get_record_name(buf, sizeof(buf), rec));
177 static int h_compare_record(const void *r1, const void *r2)
179 const struct bootstage_record *rec1 = r1, *rec2 = r2;
181 return rec1->time_us > rec2->time_us ? 1 : -1;
184 #ifdef CONFIG_OF_LIBFDT
186 * Add all bootstage timings to a device tree.
188 * @param blob Device tree blob
189 * @return 0 on success, != 0 on failure.
191 static int add_bootstages_devicetree(struct fdt_header *blob)
202 * Create the node for bootstage.
203 * The address of flat device tree is set up by the command bootm.
205 bootstage = fdt_add_subnode(blob, 0, "bootstage");
210 * Insert the timings to the device tree in the reverse order so
211 * that they can be printed in the Linux kernel in the right order.
213 for (id = BOOTSTAGE_ID_COUNT - 1, i = 0; id >= 0; id--, i++) {
214 struct bootstage_record *rec = &record[id];
217 if (id != BOOTSTAGE_ID_AWAKE && rec->time_us == 0)
220 node = fdt_add_subnode(blob, bootstage, simple_itoa(i));
224 /* add properties to the node. */
225 if (fdt_setprop_string(blob, node, "name",
226 get_record_name(buf, sizeof(buf), rec)))
229 /* Check if this is a 'mark' or 'accum' record */
230 if (fdt_setprop_cell(blob, node,
231 rec->start_us ? "accum" : "mark",
239 int bootstage_fdt_add_report(void)
241 if (add_bootstages_devicetree(working_fdt))
242 puts("bootstage: Failed to add to device tree\n");
248 void bootstage_report(void)
250 struct bootstage_record *rec = record;
254 puts("Timer summary in microseconds:\n");
255 printf("%11s%11s %s\n", "Mark", "Elapsed", "Stage");
257 /* Fake the first record - we could get it from early boot */
260 prev = print_time_record(BOOTSTAGE_ID_AWAKE, rec, 0);
262 /* Sort records by increasing time */
263 qsort(record, ARRAY_SIZE(record), sizeof(*rec), h_compare_record);
265 for (id = 0; id < BOOTSTAGE_ID_COUNT; id++, rec++) {
266 if (rec->time_us != 0 && !rec->start_us)
267 prev = print_time_record(rec->id, rec, prev);
269 if (next_id > BOOTSTAGE_ID_COUNT)
270 printf("(Overflowed internal boot id table by %d entries\n"
271 "- please increase CONFIG_BOOTSTAGE_USER_COUNT\n",
272 next_id - BOOTSTAGE_ID_COUNT);
274 puts("\nAccumulated time:\n");
275 for (id = 0, rec = record; id < BOOTSTAGE_ID_COUNT; id++, rec++) {
277 prev = print_time_record(id, rec, -1);
281 ulong __timer_get_boot_us(void)
283 static ulong base_time;
286 * We can't implement this properly. Return 0 on the first call and
287 * larger values after that.
290 return get_timer(base_time) * 1000;
291 base_time = get_timer(0);
295 ulong timer_get_boot_us(void)
296 __attribute__((weak, alias("__timer_get_boot_us")));
299 * Append data to a memory buffer
301 * Write data to the buffer if there is space. Whether there is space or not,
302 * the buffer pointer is incremented.
304 * @param ptrp Pointer to buffer, updated by this function
305 * @param end Pointer to end of buffer
306 * @param data Data to write to buffer
307 * @param size Size of data
309 static void append_data(char **ptrp, char *end, const void *data, int size)
317 memcpy(ptr, data, size);
320 int bootstage_stash(void *base, int size)
322 struct bootstage_hdr *hdr = (struct bootstage_hdr *)base;
323 struct bootstage_record *rec;
325 char *ptr = base, *end = ptr + size;
329 if (hdr + 1 > (struct bootstage_hdr *)end) {
330 debug("%s: Not enough space for bootstage hdr\n", __func__);
334 /* Write an arbitrary version number */
335 hdr->version = BOOTSTAGE_VERSION;
337 /* Count the number of records, and write that value first */
338 for (rec = record, id = count = 0; id < BOOTSTAGE_ID_COUNT;
340 if (rec->time_us != 0)
345 hdr->magic = BOOTSTAGE_MAGIC;
348 /* Write the records, silently stopping when we run out of space */
349 for (rec = record, id = 0; id < BOOTSTAGE_ID_COUNT; id++, rec++) {
350 if (rec->time_us != 0)
351 append_data(&ptr, end, rec, sizeof(*rec));
354 /* Write the name strings */
355 for (rec = record, id = 0; id < BOOTSTAGE_ID_COUNT; id++, rec++) {
356 if (rec->time_us != 0) {
359 name = get_record_name(buf, sizeof(buf), rec);
360 append_data(&ptr, end, name, strlen(name) + 1);
364 /* Check for buffer overflow */
366 debug("%s: Not enough space for bootstage stash\n", __func__);
370 /* Update total data size */
371 hdr->size = ptr - (char *)base;
372 printf("Stashed %d records\n", hdr->count);
377 int bootstage_unstash(void *base, int size)
379 struct bootstage_hdr *hdr = (struct bootstage_hdr *)base;
380 struct bootstage_record *rec;
381 char *ptr = base, *end = ptr + size;
386 end = (char *)(~(uintptr_t)0);
388 if (hdr + 1 > (struct bootstage_hdr *)end) {
389 debug("%s: Not enough space for bootstage hdr\n", __func__);
393 if (hdr->magic != BOOTSTAGE_MAGIC) {
394 debug("%s: Invalid bootstage magic\n", __func__);
398 if (ptr + hdr->size > end) {
399 debug("%s: Bootstage data runs past buffer end\n", __func__);
403 if (hdr->count * sizeof(*rec) > hdr->size) {
404 debug("%s: Bootstage has %d records needing %d bytes, but "
405 "only %d bytes is available\n", __func__, hdr->count,
406 hdr->count * sizeof(*rec), hdr->size);
410 if (hdr->version != BOOTSTAGE_VERSION) {
411 debug("%s: Bootstage data version %#0x unrecognised\n",
412 __func__, hdr->version);
416 if (next_id + hdr->count > BOOTSTAGE_ID_COUNT) {
417 debug("%s: Bootstage has %d records, we have space for %d\n"
418 "- please increase CONFIG_BOOTSTAGE_USER_COUNT\n",
419 __func__, hdr->count, BOOTSTAGE_ID_COUNT - next_id);
425 /* Read the records */
426 rec_size = hdr->count * sizeof(*record);
427 memcpy(record + next_id, ptr, rec_size);
429 /* Read the name strings */
431 for (rec = record + next_id, id = 0; id < hdr->count; id++, rec++) {
434 /* Assume no data corruption here */
435 ptr += strlen(ptr) + 1;
438 /* Mark the records as read */
439 next_id += hdr->count;
440 printf("Unstashed %d records\n", hdr->count);