1 /* 2 * Copyright (c) 2011, Google Inc. All rights reserved. 3 * 4 * See file CREDITS for list of people who contributed to this 5 * project. 6 * 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. 11 * 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. 16 * 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, 20 * MA 02111-1307 USA 21 */ 22 23 24 /* 25 * This module records the progress of boot and arbitrary commands, and 26 * permits accurate timestamping of each. 27 * 28 * TBD: Pass timings to kernel in the FDT 29 */ 30 31 #include <common.h> 32 #include <libfdt.h> 33 34 DECLARE_GLOBAL_DATA_PTR; 35 36 struct bootstage_record { 37 ulong time_us; 38 uint32_t start_us; 39 const char *name; 40 int flags; /* see enum bootstage_flags */ 41 enum bootstage_id id; 42 }; 43 44 static struct bootstage_record record[BOOTSTAGE_ID_COUNT] = { {1} }; 45 static int next_id = BOOTSTAGE_ID_USER; 46 47 ulong bootstage_add_record(enum bootstage_id id, const char *name, 48 int flags, ulong mark) 49 { 50 struct bootstage_record *rec; 51 52 if (flags & BOOTSTAGEF_ALLOC) 53 id = next_id++; 54 55 if (id < BOOTSTAGE_ID_COUNT) { 56 rec = &record[id]; 57 58 /* Only record the first event for each */ 59 if (!rec->time_us) { 60 rec->time_us = mark; 61 rec->name = name; 62 rec->flags = flags; 63 rec->id = id; 64 } 65 } 66 67 /* Tell the board about this progress */ 68 show_boot_progress(flags & BOOTSTAGEF_ERROR ? -id : id); 69 return mark; 70 } 71 72 73 ulong bootstage_mark(enum bootstage_id id) 74 { 75 return bootstage_add_record(id, NULL, 0, timer_get_boot_us()); 76 } 77 78 ulong bootstage_error(enum bootstage_id id) 79 { 80 return bootstage_add_record(id, NULL, BOOTSTAGEF_ERROR, 81 timer_get_boot_us()); 82 } 83 84 ulong bootstage_mark_name(enum bootstage_id id, const char *name) 85 { 86 int flags = 0; 87 88 if (id == BOOTSTAGE_ID_ALLOC) 89 flags = BOOTSTAGEF_ALLOC; 90 return bootstage_add_record(id, name, flags, timer_get_boot_us()); 91 } 92 93 uint32_t bootstage_start(enum bootstage_id id, const char *name) 94 { 95 struct bootstage_record *rec = &record[id]; 96 97 rec->start_us = timer_get_boot_us(); 98 rec->name = name; 99 return rec->start_us; 100 } 101 102 uint32_t bootstage_accum(enum bootstage_id id) 103 { 104 struct bootstage_record *rec = &record[id]; 105 uint32_t duration; 106 107 duration = (uint32_t)timer_get_boot_us() - rec->start_us; 108 rec->time_us += duration; 109 return duration; 110 } 111 112 static void print_time(unsigned long us_time) 113 { 114 char str[15], *s; 115 int grab = 3; 116 117 /* We don't seem to have %'d in U-Boot */ 118 sprintf(str, "%12lu", us_time); 119 for (s = str + 3; *s; s += grab) { 120 if (s != str + 3) 121 putc(s[-1] != ' ' ? ',' : ' '); 122 printf("%.*s", grab, s); 123 grab = 3; 124 } 125 } 126 127 static uint32_t print_time_record(enum bootstage_id id, 128 struct bootstage_record *rec, uint32_t prev) 129 { 130 if (prev == -1U) { 131 printf("%11s", ""); 132 print_time(rec->time_us); 133 } else { 134 print_time(rec->time_us); 135 print_time(rec->time_us - prev); 136 } 137 if (rec->name) 138 printf(" %s\n", rec->name); 139 else if (id >= BOOTSTAGE_ID_USER) 140 printf(" user_%d\n", id - BOOTSTAGE_ID_USER); 141 else 142 printf(" id=%d\n", id); 143 return rec->time_us; 144 } 145 146 static int h_compare_record(const void *r1, const void *r2) 147 { 148 const struct bootstage_record *rec1 = r1, *rec2 = r2; 149 150 return rec1->time_us > rec2->time_us ? 1 : -1; 151 } 152 153 void bootstage_report(void) 154 { 155 struct bootstage_record *rec = record; 156 int id; 157 uint32_t prev; 158 159 puts("Timer summary in microseconds:\n"); 160 printf("%11s%11s %s\n", "Mark", "Elapsed", "Stage"); 161 162 /* Fake the first record - we could get it from early boot */ 163 rec->name = "reset"; 164 rec->time_us = 0; 165 prev = print_time_record(BOOTSTAGE_ID_AWAKE, rec, 0); 166 167 /* Sort records by increasing time */ 168 qsort(record, ARRAY_SIZE(record), sizeof(*rec), h_compare_record); 169 170 for (id = 0; id < BOOTSTAGE_ID_COUNT; id++, rec++) { 171 if (rec->time_us != 0 && !rec->start_us) 172 prev = print_time_record(rec->id, rec, prev); 173 } 174 if (next_id > BOOTSTAGE_ID_COUNT) 175 printf("(Overflowed internal boot id table by %d entries\n" 176 "- please increase CONFIG_BOOTSTAGE_USER_COUNT\n", 177 next_id - BOOTSTAGE_ID_COUNT); 178 179 puts("\nAccumulated time:\n"); 180 for (id = 0, rec = record; id < BOOTSTAGE_ID_COUNT; id++, rec++) { 181 if (rec->start_us) 182 prev = print_time_record(id, rec, -1); 183 } 184 } 185 186 ulong __timer_get_boot_us(void) 187 { 188 static ulong base_time; 189 190 /* 191 * We can't implement this properly. Return 0 on the first call and 192 * larger values after that. 193 */ 194 if (base_time) 195 return get_timer(base_time) * 1000; 196 base_time = get_timer(0); 197 return 0; 198 } 199 200 ulong timer_get_boot_us(void) 201 __attribute__((weak, alias("__timer_get_boot_us"))); 202