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.
15 #include <linux/compiler.h>
16 #include <linux/libfdt.h>
18 DECLARE_GLOBAL_DATA_PTR;
21 RECORD_COUNT = CONFIG_VAL(BOOTSTAGE_RECORD_COUNT),
24 struct bootstage_record {
28 int flags; /* see enum bootstage_flags */
32 struct bootstage_data {
35 struct bootstage_record record[RECORD_COUNT];
39 BOOTSTAGE_VERSION = 0,
40 BOOTSTAGE_MAGIC = 0xb00757a3,
44 struct bootstage_hdr {
45 u32 version; /* BOOTSTAGE_VERSION */
46 u32 count; /* Number of records */
47 u32 size; /* Total data size (non-zero if valid) */
48 u32 magic; /* Magic number */
49 u32 next_id; /* Next ID to use for bootstage */
52 int bootstage_relocate(void)
54 struct bootstage_data *data = gd->bootstage;
58 /* Figure out where to relocate the strings to */
59 ptr = (char *)(data + 1);
62 * Duplicate all strings. They may point to an old location in the
63 * program .text section that can eventually get trashed.
65 debug("Relocating %d records\n", data->rec_count);
66 for (i = 0; i < data->rec_count; i++) {
67 const char *from = data->record[i].name;
70 data->record[i].name = ptr;
71 ptr += strlen(ptr) + 1;
77 struct bootstage_record *find_id(struct bootstage_data *data,
80 struct bootstage_record *rec;
81 struct bootstage_record *end;
83 for (rec = data->record, end = rec + data->rec_count; rec < end;
92 struct bootstage_record *ensure_id(struct bootstage_data *data,
95 struct bootstage_record *rec;
97 rec = find_id(data, id);
98 if (!rec && data->rec_count < RECORD_COUNT) {
99 rec = &data->record[data->rec_count++];
107 ulong bootstage_add_record(enum bootstage_id id, const char *name,
108 int flags, ulong mark)
110 struct bootstage_data *data = gd->bootstage;
111 struct bootstage_record *rec;
114 * initf_bootstage() is called very early during boot but since hang()
115 * calls bootstage_error() we can be called before bootstage is set up.
116 * Add a check to avoid this.
120 if (flags & BOOTSTAGEF_ALLOC)
121 id = data->next_id++;
123 /* Only record the first event for each */
124 rec = find_id(data, id);
125 if (!rec && data->rec_count < RECORD_COUNT) {
126 rec = &data->record[data->rec_count++];
133 /* Tell the board about this progress */
134 show_boot_progress(flags & BOOTSTAGEF_ERROR ? -id : id);
140 ulong bootstage_mark(enum bootstage_id id)
142 return bootstage_add_record(id, NULL, 0, timer_get_boot_us());
145 ulong bootstage_error(enum bootstage_id id)
147 return bootstage_add_record(id, NULL, BOOTSTAGEF_ERROR,
148 timer_get_boot_us());
151 ulong bootstage_mark_name(enum bootstage_id id, const char *name)
155 if (id == BOOTSTAGE_ID_ALLOC)
156 flags = BOOTSTAGEF_ALLOC;
158 return bootstage_add_record(id, name, flags, timer_get_boot_us());
161 ulong bootstage_mark_code(const char *file, const char *func, int linenum)
164 __maybe_unused char *end;
167 /* First work out the length we need to allocate */
175 str = malloc(len + 1);
179 p += snprintf(p, end - p, "%s,", file);
181 p += snprintf(p, end - p, "%d", linenum);
183 p += snprintf(p, end - p, ": %s", func);
185 return bootstage_mark_name(BOOTSTAGE_ID_ALLOC, str);
188 uint32_t bootstage_start(enum bootstage_id id, const char *name)
190 struct bootstage_data *data = gd->bootstage;
191 struct bootstage_record *rec = ensure_id(data, id);
192 ulong start_us = timer_get_boot_us();
195 rec->start_us = start_us;
202 uint32_t bootstage_accum(enum bootstage_id id)
204 struct bootstage_data *data = gd->bootstage;
205 struct bootstage_record *rec = ensure_id(data, id);
210 duration = (uint32_t)timer_get_boot_us() - rec->start_us;
211 rec->time_us += duration;
217 * Get a record name as a printable string
219 * @param buf Buffer to put name if needed
220 * @param len Length of buffer
221 * @param rec Boot stage record to get the name from
222 * @return pointer to name, either from the record or pointing to buf.
224 static const char *get_record_name(char *buf, int len,
225 const struct bootstage_record *rec)
229 else if (rec->id >= BOOTSTAGE_ID_USER)
230 snprintf(buf, len, "user_%d", rec->id - BOOTSTAGE_ID_USER);
232 snprintf(buf, len, "id=%d", rec->id);
237 static uint32_t print_time_record(struct bootstage_record *rec, uint32_t prev)
243 print_grouped_ull(rec->time_us, BOOTSTAGE_DIGITS);
245 print_grouped_ull(rec->time_us, BOOTSTAGE_DIGITS);
246 print_grouped_ull(rec->time_us - prev, BOOTSTAGE_DIGITS);
248 printf(" %s\n", get_record_name(buf, sizeof(buf), rec));
253 static int h_compare_record(const void *r1, const void *r2)
255 const struct bootstage_record *rec1 = r1, *rec2 = r2;
257 return rec1->time_us > rec2->time_us ? 1 : -1;
260 #ifdef CONFIG_OF_LIBFDT
262 * Add all bootstage timings to a device tree.
264 * @param blob Device tree blob
265 * @return 0 on success, != 0 on failure.
267 static int add_bootstages_devicetree(struct fdt_header *blob)
269 struct bootstage_data *data = gd->bootstage;
279 * Create the node for bootstage.
280 * The address of flat device tree is set up by the command bootm.
282 bootstage = fdt_add_subnode(blob, 0, "bootstage");
287 * Insert the timings to the device tree in the reverse order so
288 * that they can be printed in the Linux kernel in the right order.
290 for (recnum = data->rec_count - 1, i = 0; recnum >= 0; recnum--, i++) {
291 struct bootstage_record *rec = &data->record[recnum];
294 if (rec->id != BOOTSTAGE_ID_AWAKE && rec->time_us == 0)
297 node = fdt_add_subnode(blob, bootstage, simple_itoa(i));
301 /* add properties to the node. */
302 if (fdt_setprop_string(blob, node, "name",
303 get_record_name(buf, sizeof(buf), rec)))
306 /* Check if this is a 'mark' or 'accum' record */
307 if (fdt_setprop_cell(blob, node,
308 rec->start_us ? "accum" : "mark",
316 int bootstage_fdt_add_report(void)
318 if (add_bootstages_devicetree(working_fdt))
319 puts("bootstage: Failed to add to device tree\n");
325 void bootstage_report(void)
327 struct bootstage_data *data = gd->bootstage;
328 struct bootstage_record *rec = data->record;
332 printf("Timer summary in microseconds (%d records):\n",
334 printf("%11s%11s %s\n", "Mark", "Elapsed", "Stage");
336 prev = print_time_record(rec, 0);
338 /* Sort records by increasing time */
339 qsort(data->record, data->rec_count, sizeof(*rec), h_compare_record);
341 for (i = 1, rec++; i < data->rec_count; i++, rec++) {
342 if (rec->id && !rec->start_us)
343 prev = print_time_record(rec, prev);
345 if (data->rec_count > RECORD_COUNT)
346 printf("Overflowed internal boot id table by %d entries\n"
347 "Please increase CONFIG_(SPL_)BOOTSTAGE_RECORD_COUNT\n",
348 data->rec_count - RECORD_COUNT);
350 puts("\nAccumulated time:\n");
351 for (i = 0, rec = data->record; i < data->rec_count; i++, rec++) {
353 prev = print_time_record(rec, -1);
358 * Append data to a memory buffer
360 * Write data to the buffer if there is space. Whether there is space or not,
361 * the buffer pointer is incremented.
363 * @param ptrp Pointer to buffer, updated by this function
364 * @param end Pointer to end of buffer
365 * @param data Data to write to buffer
366 * @param size Size of data
368 static void append_data(char **ptrp, char *end, const void *data, int size)
376 memcpy(ptr, data, size);
379 int bootstage_stash(void *base, int size)
381 const struct bootstage_data *data = gd->bootstage;
382 struct bootstage_hdr *hdr = (struct bootstage_hdr *)base;
383 const struct bootstage_record *rec;
385 char *ptr = base, *end = ptr + size;
388 if (hdr + 1 > (struct bootstage_hdr *)end) {
389 debug("%s: Not enough space for bootstage hdr\n", __func__);
393 /* Write an arbitrary version number */
394 hdr->version = BOOTSTAGE_VERSION;
396 hdr->count = data->rec_count;
398 hdr->magic = BOOTSTAGE_MAGIC;
399 hdr->next_id = data->next_id;
402 /* Write the records, silently stopping when we run out of space */
403 for (rec = data->record, i = 0; i < data->rec_count; i++, rec++)
404 append_data(&ptr, end, rec, sizeof(*rec));
406 /* Write the name strings */
407 for (rec = data->record, i = 0; i < data->rec_count; i++, rec++) {
410 name = get_record_name(buf, sizeof(buf), rec);
411 append_data(&ptr, end, name, strlen(name) + 1);
414 /* Check for buffer overflow */
416 debug("%s: Not enough space for bootstage stash\n", __func__);
420 /* Update total data size */
421 hdr->size = ptr - (char *)base;
422 debug("Stashed %d records\n", hdr->count);
427 int bootstage_unstash(const void *base, int size)
429 const struct bootstage_hdr *hdr = (struct bootstage_hdr *)base;
430 struct bootstage_data *data = gd->bootstage;
431 const char *ptr = base, *end = ptr + size;
432 struct bootstage_record *rec;
437 end = (char *)(~(uintptr_t)0);
439 if (hdr + 1 > (struct bootstage_hdr *)end) {
440 debug("%s: Not enough space for bootstage hdr\n", __func__);
444 if (hdr->magic != BOOTSTAGE_MAGIC) {
445 debug("%s: Invalid bootstage magic\n", __func__);
449 if (ptr + hdr->size > end) {
450 debug("%s: Bootstage data runs past buffer end\n", __func__);
454 if (hdr->count * sizeof(*rec) > hdr->size) {
455 debug("%s: Bootstage has %d records needing %lu bytes, but "
456 "only %d bytes is available\n", __func__, hdr->count,
457 (ulong)hdr->count * sizeof(*rec), hdr->size);
461 if (hdr->version != BOOTSTAGE_VERSION) {
462 debug("%s: Bootstage data version %#0x unrecognised\n",
463 __func__, hdr->version);
467 if (data->rec_count + hdr->count > RECORD_COUNT) {
468 debug("%s: Bootstage has %d records, we have space for %d\n"
469 "Please increase CONFIG_(SPL_)BOOTSTAGE_RECORD_COUNT\n",
470 __func__, hdr->count, RECORD_COUNT - data->rec_count);
476 /* Read the records */
477 rec_size = hdr->count * sizeof(*data->record);
478 memcpy(data->record + data->rec_count, ptr, rec_size);
480 /* Read the name strings */
482 for (rec = data->record + data->next_id, i = 0; i < hdr->count;
485 if (spl_phase() == PHASE_SPL)
486 rec->name = strdup(ptr);
488 /* Assume no data corruption here */
489 ptr += strlen(ptr) + 1;
492 /* Mark the records as read */
493 data->rec_count += hdr->count;
494 data->next_id = hdr->next_id;
495 debug("Unstashed %d records\n", hdr->count);
500 int bootstage_get_size(void)
502 struct bootstage_data *data = gd->bootstage;
503 struct bootstage_record *rec;
507 size = sizeof(struct bootstage_data);
508 for (rec = data->record, i = 0; i < data->rec_count;
510 size += strlen(rec->name) + 1;
515 int bootstage_init(bool first)
517 struct bootstage_data *data;
518 int size = sizeof(struct bootstage_data);
520 gd->bootstage = (struct bootstage_data *)malloc(size);
523 data = gd->bootstage;
524 memset(data, '\0', size);
526 data->next_id = BOOTSTAGE_ID_USER;
527 bootstage_add_record(BOOTSTAGE_ID_AWAKE, "reset", 0, 0);