1 // SPDX-License-Identifier: GPL-2.0+
3 * Copyright (c) 2011, Google Inc. All rights reserved.
8 * This module records the progress of boot and arbitrary commands, and
9 * permits accurate timestamping of each.
13 #include <linux/libfdt.h>
15 #include <linux/compiler.h>
17 DECLARE_GLOBAL_DATA_PTR;
20 RECORD_COUNT = CONFIG_VAL(BOOTSTAGE_RECORD_COUNT),
23 struct bootstage_record {
27 int flags; /* see enum bootstage_flags */
31 struct bootstage_data {
34 struct bootstage_record record[RECORD_COUNT];
38 BOOTSTAGE_VERSION = 0,
39 BOOTSTAGE_MAGIC = 0xb00757a3,
43 struct bootstage_hdr {
44 uint32_t version; /* BOOTSTAGE_VERSION */
45 uint32_t count; /* Number of records */
46 uint32_t size; /* Total data size (non-zero if valid) */
47 uint32_t magic; /* Unused */
50 int bootstage_relocate(void)
52 struct bootstage_data *data = gd->bootstage;
56 * Duplicate all strings. They may point to an old location in the
57 * program .text section that can eventually get trashed.
59 debug("Relocating %d records\n", data->rec_count);
60 for (i = 0; i < data->rec_count; i++)
61 data->record[i].name = strdup(data->record[i].name);
66 struct bootstage_record *find_id(struct bootstage_data *data,
69 struct bootstage_record *rec;
70 struct bootstage_record *end;
72 for (rec = data->record, end = rec + data->rec_count; rec < end;
81 struct bootstage_record *ensure_id(struct bootstage_data *data,
84 struct bootstage_record *rec;
86 rec = find_id(data, id);
87 if (!rec && data->rec_count < RECORD_COUNT) {
88 rec = &data->record[data->rec_count++];
96 ulong bootstage_add_record(enum bootstage_id id, const char *name,
97 int flags, ulong mark)
99 struct bootstage_data *data = gd->bootstage;
100 struct bootstage_record *rec;
103 * initf_bootstage() is called very early during boot but since hang()
104 * calls bootstage_error() we can be called before bootstage is set up.
105 * Add a check to avoid this.
109 if (flags & BOOTSTAGEF_ALLOC)
110 id = data->next_id++;
112 /* Only record the first event for each */
113 rec = find_id(data, id);
114 if (!rec && data->rec_count < RECORD_COUNT) {
115 rec = &data->record[data->rec_count++];
122 /* Tell the board about this progress */
123 show_boot_progress(flags & BOOTSTAGEF_ERROR ? -id : id);
129 ulong bootstage_mark(enum bootstage_id id)
131 return bootstage_add_record(id, NULL, 0, timer_get_boot_us());
134 ulong bootstage_error(enum bootstage_id id)
136 return bootstage_add_record(id, NULL, BOOTSTAGEF_ERROR,
137 timer_get_boot_us());
140 ulong bootstage_mark_name(enum bootstage_id id, const char *name)
144 if (id == BOOTSTAGE_ID_ALLOC)
145 flags = BOOTSTAGEF_ALLOC;
147 return bootstage_add_record(id, name, flags, timer_get_boot_us());
150 ulong bootstage_mark_code(const char *file, const char *func, int linenum)
153 __maybe_unused char *end;
156 /* First work out the length we need to allocate */
164 str = malloc(len + 1);
168 p += snprintf(p, end - p, "%s,", file);
170 p += snprintf(p, end - p, "%d", linenum);
172 p += snprintf(p, end - p, ": %s", func);
174 return bootstage_mark_name(BOOTSTAGE_ID_ALLOC, str);
177 uint32_t bootstage_start(enum bootstage_id id, const char *name)
179 struct bootstage_data *data = gd->bootstage;
180 struct bootstage_record *rec = ensure_id(data, id);
181 ulong start_us = timer_get_boot_us();
184 rec->start_us = start_us;
191 uint32_t bootstage_accum(enum bootstage_id id)
193 struct bootstage_data *data = gd->bootstage;
194 struct bootstage_record *rec = ensure_id(data, id);
199 duration = (uint32_t)timer_get_boot_us() - rec->start_us;
200 rec->time_us += duration;
206 * Get a record name as a printable string
208 * @param buf Buffer to put name if needed
209 * @param len Length of buffer
210 * @param rec Boot stage record to get the name from
211 * @return pointer to name, either from the record or pointing to buf.
213 static const char *get_record_name(char *buf, int len,
214 const struct bootstage_record *rec)
218 else if (rec->id >= BOOTSTAGE_ID_USER)
219 snprintf(buf, len, "user_%d", rec->id - BOOTSTAGE_ID_USER);
221 snprintf(buf, len, "id=%d", rec->id);
226 static uint32_t print_time_record(struct bootstage_record *rec, uint32_t prev)
232 print_grouped_ull(rec->time_us, BOOTSTAGE_DIGITS);
234 print_grouped_ull(rec->time_us, BOOTSTAGE_DIGITS);
235 print_grouped_ull(rec->time_us - prev, BOOTSTAGE_DIGITS);
237 printf(" %s\n", get_record_name(buf, sizeof(buf), rec));
242 static int h_compare_record(const void *r1, const void *r2)
244 const struct bootstage_record *rec1 = r1, *rec2 = r2;
246 return rec1->time_us > rec2->time_us ? 1 : -1;
249 #ifdef CONFIG_OF_LIBFDT
251 * Add all bootstage timings to a device tree.
253 * @param blob Device tree blob
254 * @return 0 on success, != 0 on failure.
256 static int add_bootstages_devicetree(struct fdt_header *blob)
258 struct bootstage_data *data = gd->bootstage;
268 * Create the node for bootstage.
269 * The address of flat device tree is set up by the command bootm.
271 bootstage = fdt_add_subnode(blob, 0, "bootstage");
276 * Insert the timings to the device tree in the reverse order so
277 * that they can be printed in the Linux kernel in the right order.
279 for (recnum = data->rec_count - 1, i = 0; recnum >= 0; recnum--, i++) {
280 struct bootstage_record *rec = &data->record[recnum];
283 if (rec->id != BOOTSTAGE_ID_AWAKE && rec->time_us == 0)
286 node = fdt_add_subnode(blob, bootstage, simple_itoa(i));
290 /* add properties to the node. */
291 if (fdt_setprop_string(blob, node, "name",
292 get_record_name(buf, sizeof(buf), rec)))
295 /* Check if this is a 'mark' or 'accum' record */
296 if (fdt_setprop_cell(blob, node,
297 rec->start_us ? "accum" : "mark",
305 int bootstage_fdt_add_report(void)
307 if (add_bootstages_devicetree(working_fdt))
308 puts("bootstage: Failed to add to device tree\n");
314 void bootstage_report(void)
316 struct bootstage_data *data = gd->bootstage;
317 struct bootstage_record *rec = data->record;
321 printf("Timer summary in microseconds (%d records):\n",
323 printf("%11s%11s %s\n", "Mark", "Elapsed", "Stage");
325 prev = print_time_record(rec, 0);
327 /* Sort records by increasing time */
328 qsort(data->record, data->rec_count, sizeof(*rec), h_compare_record);
330 for (i = 1, rec++; i < data->rec_count; i++, rec++) {
331 if (rec->id && !rec->start_us)
332 prev = print_time_record(rec, prev);
334 if (data->rec_count > RECORD_COUNT)
335 printf("Overflowed internal boot id table by %d entries\n"
336 "Please increase CONFIG_(SPL_)BOOTSTAGE_RECORD_COUNT\n",
337 data->rec_count - RECORD_COUNT);
339 puts("\nAccumulated time:\n");
340 for (i = 0, rec = data->record; i < data->rec_count; i++, rec++) {
342 prev = print_time_record(rec, -1);
347 * Append data to a memory buffer
349 * Write data to the buffer if there is space. Whether there is space or not,
350 * the buffer pointer is incremented.
352 * @param ptrp Pointer to buffer, updated by this function
353 * @param end Pointer to end of buffer
354 * @param data Data to write to buffer
355 * @param size Size of data
357 static void append_data(char **ptrp, char *end, const void *data, int size)
365 memcpy(ptr, data, size);
368 int bootstage_stash(void *base, int size)
370 const struct bootstage_data *data = gd->bootstage;
371 struct bootstage_hdr *hdr = (struct bootstage_hdr *)base;
372 const struct bootstage_record *rec;
374 char *ptr = base, *end = ptr + size;
378 if (hdr + 1 > (struct bootstage_hdr *)end) {
379 debug("%s: Not enough space for bootstage hdr\n", __func__);
383 /* Write an arbitrary version number */
384 hdr->version = BOOTSTAGE_VERSION;
386 /* Count the number of records, and write that value first */
387 for (rec = data->record, i = count = 0; i < data->rec_count;
394 hdr->magic = BOOTSTAGE_MAGIC;
397 /* Write the records, silently stopping when we run out of space */
398 for (rec = data->record, i = 0; i < data->rec_count; i++, rec++) {
399 append_data(&ptr, end, rec, sizeof(*rec));
402 /* Write the name strings */
403 for (rec = data->record, i = 0; i < data->rec_count; i++, rec++) {
406 name = get_record_name(buf, sizeof(buf), rec);
407 append_data(&ptr, end, name, strlen(name) + 1);
410 /* Check for buffer overflow */
412 debug("%s: Not enough space for bootstage stash\n", __func__);
416 /* Update total data size */
417 hdr->size = ptr - (char *)base;
418 debug("Stashed %d records\n", hdr->count);
423 int bootstage_unstash(const void *base, int size)
425 const struct bootstage_hdr *hdr = (struct bootstage_hdr *)base;
426 struct bootstage_data *data = gd->bootstage;
427 const char *ptr = base, *end = ptr + size;
428 struct bootstage_record *rec;
433 end = (char *)(~(uintptr_t)0);
435 if (hdr + 1 > (struct bootstage_hdr *)end) {
436 debug("%s: Not enough space for bootstage hdr\n", __func__);
440 if (hdr->magic != BOOTSTAGE_MAGIC) {
441 debug("%s: Invalid bootstage magic\n", __func__);
445 if (ptr + hdr->size > end) {
446 debug("%s: Bootstage data runs past buffer end\n", __func__);
450 if (hdr->count * sizeof(*rec) > hdr->size) {
451 debug("%s: Bootstage has %d records needing %lu bytes, but "
452 "only %d bytes is available\n", __func__, hdr->count,
453 (ulong)hdr->count * sizeof(*rec), hdr->size);
457 if (hdr->version != BOOTSTAGE_VERSION) {
458 debug("%s: Bootstage data version %#0x unrecognised\n",
459 __func__, hdr->version);
463 if (data->rec_count + hdr->count > RECORD_COUNT) {
464 debug("%s: Bootstage has %d records, we have space for %d\n"
465 "Please increase CONFIG_(SPL_)BOOTSTAGE_RECORD_COUNT\n",
466 __func__, hdr->count, RECORD_COUNT - data->rec_count);
472 /* Read the records */
473 rec_size = hdr->count * sizeof(*data->record);
474 memcpy(data->record + data->rec_count, ptr, rec_size);
476 /* Read the name strings */
478 for (rec = data->record + data->next_id, i = 0; i < hdr->count;
482 /* Assume no data corruption here */
483 ptr += strlen(ptr) + 1;
486 /* Mark the records as read */
487 data->rec_count += hdr->count;
488 debug("Unstashed %d records\n", hdr->count);
493 int bootstage_get_size(void)
495 return sizeof(struct bootstage_data);
498 int bootstage_init(bool first)
500 struct bootstage_data *data;
501 int size = sizeof(struct bootstage_data);
503 gd->bootstage = (struct bootstage_data *)malloc(size);
506 data = gd->bootstage;
507 memset(data, '\0', size);
509 data->next_id = BOOTSTAGE_ID_USER;
510 bootstage_add_record(BOOTSTAGE_ID_AWAKE, "reset", 0, 0);