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;
47 ulong bootstage_add_record(enum bootstage_id id, const char *name,
48 int flags, ulong mark)
50 struct bootstage_record *rec;
52 if (flags & BOOTSTAGEF_ALLOC)
55 if (id < BOOTSTAGE_ID_COUNT) {
58 /* Only record the first event for each */
67 /* Tell the board about this progress */
68 show_boot_progress(flags & BOOTSTAGEF_ERROR ? -id : id);
73 ulong bootstage_mark(enum bootstage_id id)
75 return bootstage_add_record(id, NULL, 0, timer_get_boot_us());
78 ulong bootstage_error(enum bootstage_id id)
80 return bootstage_add_record(id, NULL, BOOTSTAGEF_ERROR,
84 ulong bootstage_mark_name(enum bootstage_id id, const char *name)
88 if (id == BOOTSTAGE_ID_ALLOC)
89 flags = BOOTSTAGEF_ALLOC;
90 return bootstage_add_record(id, name, flags, timer_get_boot_us());
93 uint32_t bootstage_start(enum bootstage_id id, const char *name)
95 struct bootstage_record *rec = &record[id];
97 rec->start_us = timer_get_boot_us();
102 uint32_t bootstage_accum(enum bootstage_id id)
104 struct bootstage_record *rec = &record[id];
107 duration = (uint32_t)timer_get_boot_us() - rec->start_us;
108 rec->time_us += duration;
112 static void print_time(unsigned long us_time)
117 /* We don't seem to have %'d in U-Boot */
118 sprintf(str, "%12lu", us_time);
119 for (s = str + 3; *s; s += grab) {
121 putc(s[-1] != ' ' ? ',' : ' ');
122 printf("%.*s", grab, s);
128 * Get a record name as a printable string
130 * @param buf Buffer to put name if needed
131 * @param len Length of buffer
132 * @param rec Boot stage record to get the name from
133 * @return pointer to name, either from the record or pointing to buf.
135 static const char *get_record_name(char *buf, int len,
136 struct bootstage_record *rec)
140 else if (rec->id >= BOOTSTAGE_ID_USER)
141 snprintf(buf, len, "user_%d", rec->id - BOOTSTAGE_ID_USER);
143 snprintf(buf, len, "id=%d", rec->id);
148 static uint32_t print_time_record(enum bootstage_id id,
149 struct bootstage_record *rec, uint32_t prev)
155 print_time(rec->time_us);
157 print_time(rec->time_us);
158 print_time(rec->time_us - prev);
160 printf(" %s\n", get_record_name(buf, sizeof(buf), rec));
165 static int h_compare_record(const void *r1, const void *r2)
167 const struct bootstage_record *rec1 = r1, *rec2 = r2;
169 return rec1->time_us > rec2->time_us ? 1 : -1;
172 #ifdef CONFIG_OF_LIBFDT
174 * Add all bootstage timings to a device tree.
176 * @param blob Device tree blob
177 * @return 0 on success, != 0 on failure.
179 static int add_bootstages_devicetree(struct fdt_header *blob)
190 * Create the node for bootstage.
191 * The address of flat device tree is set up by the command bootm.
193 bootstage = fdt_add_subnode(blob, 0, "bootstage");
198 * Insert the timings to the device tree in the reverse order so
199 * that they can be printed in the Linux kernel in the right order.
201 for (id = BOOTSTAGE_ID_COUNT - 1, i = 0; id >= 0; id--, i++) {
202 struct bootstage_record *rec = &record[id];
205 if (id != BOOTSTAGE_ID_AWAKE && rec->time_us == 0)
208 node = fdt_add_subnode(blob, bootstage, simple_itoa(i));
212 /* add properties to the node. */
213 if (fdt_setprop_string(blob, node, "name",
214 get_record_name(buf, sizeof(buf), rec)))
217 /* Check if this is a 'mark' or 'accum' record */
218 if (fdt_setprop_cell(blob, node,
219 rec->start_us ? "accum" : "mark",
227 int bootstage_fdt_add_report(void)
229 if (add_bootstages_devicetree(working_fdt))
230 puts("bootstage: Failed to add to device tree\n");
236 void bootstage_report(void)
238 struct bootstage_record *rec = record;
242 puts("Timer summary in microseconds:\n");
243 printf("%11s%11s %s\n", "Mark", "Elapsed", "Stage");
245 /* Fake the first record - we could get it from early boot */
248 prev = print_time_record(BOOTSTAGE_ID_AWAKE, rec, 0);
250 /* Sort records by increasing time */
251 qsort(record, ARRAY_SIZE(record), sizeof(*rec), h_compare_record);
253 for (id = 0; id < BOOTSTAGE_ID_COUNT; id++, rec++) {
254 if (rec->time_us != 0 && !rec->start_us)
255 prev = print_time_record(rec->id, rec, prev);
257 if (next_id > BOOTSTAGE_ID_COUNT)
258 printf("(Overflowed internal boot id table by %d entries\n"
259 "- please increase CONFIG_BOOTSTAGE_USER_COUNT\n",
260 next_id - BOOTSTAGE_ID_COUNT);
262 puts("\nAccumulated time:\n");
263 for (id = 0, rec = record; id < BOOTSTAGE_ID_COUNT; id++, rec++) {
265 prev = print_time_record(id, rec, -1);
269 ulong __timer_get_boot_us(void)
271 static ulong base_time;
274 * We can't implement this properly. Return 0 on the first call and
275 * larger values after that.
278 return get_timer(base_time) * 1000;
279 base_time = get_timer(0);
283 ulong timer_get_boot_us(void)
284 __attribute__((weak, alias("__timer_get_boot_us")));