common/autoboot.c

   1 /*
   2  * (C) Copyright 2000
   3  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
   4  *
   5  * SPDX-License-Identifier:     GPL-2.0+
   6  */
   7
   8 #include <common.h>
   9 #include <autoboot.h>
  10 #include <bootretry.h>
  11 #include <cli.h>
  12 #include <fdtdec.h>
  13 #include <menu.h>
  14 #include <post.h>
  15
  16 DECLARE_GLOBAL_DATA_PTR;
  17
  18 #define MAX_DELAY_STOP_STR 32
  19
  20 #ifndef DEBUG_BOOTKEYS
  21 #define DEBUG_BOOTKEYS 0
  22 #endif
  23 #define debug_bootkeys(fmt, args...)            \
  24         debug_cond(DEBUG_BOOTKEYS, fmt, ##args)
  25
  26 /* Stored value of bootdelay, used by autoboot_command() */
  27 static int stored_bootdelay;
  28
  29 /***************************************************************************
  30  * Watch for 'delay' seconds for autoboot stop or autoboot delay string.
  31  * returns: 0 -  no key string, allow autoboot 1 - got key string, abort
  32  */
  33 # if defined(CONFIG_AUTOBOOT_KEYED)
  34 static int abortboot_keyed(int bootdelay)
  35 {
  36         int abort = 0;
  37         uint64_t etime = endtick(bootdelay);
  38         struct {
  39                 char *str;
  40                 u_int len;
  41                 int retry;
  42         }
  43         delaykey[] = {
  44                 { .str = getenv("bootdelaykey"),  .retry = 1 },
  45                 { .str = getenv("bootdelaykey2"), .retry = 1 },
  46                 { .str = getenv("bootstopkey"),   .retry = 0 },
  47                 { .str = getenv("bootstopkey2"),  .retry = 0 },
  48         };
  49
  50         char presskey[MAX_DELAY_STOP_STR];
  51         u_int presskey_len = 0;
  52         u_int presskey_max = 0;
  53         u_int i;
  54
  55 #ifndef CONFIG_ZERO_BOOTDELAY_CHECK
  56         if (bootdelay == 0)
  57                 return 0;
  58 #endif
  59
  60 #  ifdef CONFIG_AUTOBOOT_PROMPT
  61         printf(CONFIG_AUTOBOOT_PROMPT);
  62 #  endif
  63
  64 #  ifdef CONFIG_AUTOBOOT_DELAY_STR
  65         if (delaykey[0].str == NULL)
  66                 delaykey[0].str = CONFIG_AUTOBOOT_DELAY_STR;
  67 #  endif
  68 #  ifdef CONFIG_AUTOBOOT_DELAY_STR2
  69         if (delaykey[1].str == NULL)
  70                 delaykey[1].str = CONFIG_AUTOBOOT_DELAY_STR2;
  71 #  endif
  72 #  ifdef CONFIG_AUTOBOOT_STOP_STR
  73         if (delaykey[2].str == NULL)
  74                 delaykey[2].str = CONFIG_AUTOBOOT_STOP_STR;
  75 #  endif
  76 #  ifdef CONFIG_AUTOBOOT_STOP_STR2
  77         if (delaykey[3].str == NULL)
  78                 delaykey[3].str = CONFIG_AUTOBOOT_STOP_STR2;
  79 #  endif
  80
  81         for (i = 0; i < sizeof(delaykey) / sizeof(delaykey[0]); i++) {
  82                 delaykey[i].len = delaykey[i].str == NULL ?
  83                                     0 : strlen(delaykey[i].str);
  84                 delaykey[i].len = delaykey[i].len > MAX_DELAY_STOP_STR ?
  85                                     MAX_DELAY_STOP_STR : delaykey[i].len;
  86
  87                 presskey_max = presskey_max > delaykey[i].len ?
  88                                     presskey_max : delaykey[i].len;
  89
  90                 debug_bootkeys("%s key:<%s>\n",
  91                                delaykey[i].retry ? "delay" : "stop",
  92                                delaykey[i].str ? delaykey[i].str : "NULL");
  93         }
  94
  95         /* In order to keep up with incoming data, check timeout only
  96          * when catch up.
  97          */
  98         do {
  99                 if (tstc()) {
 100                         if (presskey_len < presskey_max) {
 101                                 presskey[presskey_len++] = getc();
 102                         } else {
 103                                 for (i = 0; i < presskey_max - 1; i++)
 104                                         presskey[i] = presskey[i + 1];
 105
 106                                 presskey[i] = getc();
 107                         }
 108                 }
 109
 110                 for (i = 0; i < sizeof(delaykey) / sizeof(delaykey[0]); i++) {
 111                         if (delaykey[i].len > 0 &&
 112                             presskey_len >= delaykey[i].len &&
 113                                 memcmp(presskey + presskey_len -
 114                                         delaykey[i].len, delaykey[i].str,
 115                                         delaykey[i].len) == 0) {
 116                                         debug_bootkeys("got %skey\n",
 117                                                 delaykey[i].retry ? "delay" :
 118                                                 "stop");
 119
 120                                 /* don't retry auto boot */
 121                                 if (!delaykey[i].retry)
 122                                         bootretry_dont_retry();
 123                                 abort = 1;
 124                         }
 125                 }
 126         } while (!abort && get_ticks() <= etime);
 127
 128         if (!abort)
 129                 debug_bootkeys("key timeout\n");
 130
 131 #ifdef CONFIG_SILENT_CONSOLE
 132         if (abort)
 133                 gd->flags &= ~GD_FLG_SILENT;
 134 #endif
 135
 136         return abort;
 137 }
 138
 139 # else  /* !defined(CONFIG_AUTOBOOT_KEYED) */
 140
 141 #ifdef CONFIG_MENUKEY
 142 static int menukey;
 143 #endif
 144
 145 static int abortboot_normal(int bootdelay)
 146 {
 147         int abort = 0;
 148         unsigned long ts;
 149
 150 #ifdef CONFIG_MENUPROMPT
 151         printf(CONFIG_MENUPROMPT);
 152 #else
 153         if (bootdelay >= 0)
 154                 printf("Hit any key to stop autoboot: %2d ", bootdelay);
 155 #endif
 156
 157 #if defined CONFIG_ZERO_BOOTDELAY_CHECK
 158         /*
 159          * Check if key already pressed
 160          * Don't check if bootdelay < 0
 161          */
 162         if (bootdelay >= 0) {
 163                 if (tstc()) {   /* we got a key press   */
 164                         (void) getc();  /* consume input        */
 165                         puts("\b\b\b 0");
 166                         abort = 1;      /* don't auto boot      */
 167                 }
 168         }
 169 #endif
 170
 171         while ((bootdelay > 0) && (!abort)) {
 172                 --bootdelay;
 173                 /* delay 1000 ms */
 174                 ts = get_timer(0);
 175                 do {
 176                         if (tstc()) {   /* we got a key press   */
 177                                 abort  = 1;     /* don't auto boot      */
 178                                 bootdelay = 0;  /* no more delay        */
 179 # ifdef CONFIG_MENUKEY
 180                                 menukey = getc();
 181 # else
 182                                 (void) getc();  /* consume input        */
 183 # endif
 184                                 break;
 185                         }
 186                         udelay(10000);
 187                 } while (!abort && get_timer(ts) < 1000);
 188
 189                 printf("\b\b\b%2d ", bootdelay);
 190         }
 191
 192         putc('\n');
 193
 194 #ifdef CONFIG_SILENT_CONSOLE
 195         if (abort)
 196                 gd->flags &= ~GD_FLG_SILENT;
 197 #endif
 198
 199         return abort;
 200 }
 201 # endif /* CONFIG_AUTOBOOT_KEYED */
 202
 203 static int abortboot(int bootdelay)
 204 {
 205 #ifdef CONFIG_AUTOBOOT_KEYED
 206         return abortboot_keyed(bootdelay);
 207 #else
 208         return abortboot_normal(bootdelay);
 209 #endif
 210 }
 211
 212 static void process_fdt_options(const void *blob)
 213 {
 214 #if defined(CONFIG_OF_CONTROL)
 215         ulong addr;
 216
 217         /* Add an env variable to point to a kernel payload, if available */
 218         addr = fdtdec_get_config_int(gd->fdt_blob, "kernel-offset", 0);
 219         if (addr)
 220                 setenv_addr("kernaddr", (void *)(CONFIG_SYS_TEXT_BASE + addr));
 221
 222         /* Add an env variable to point to a root disk, if available */
 223         addr = fdtdec_get_config_int(gd->fdt_blob, "rootdisk-offset", 0);
 224         if (addr)
 225                 setenv_addr("rootaddr", (void *)(CONFIG_SYS_TEXT_BASE + addr));
 226 #endif /* CONFIG_OF_CONTROL */
 227 }
 228
 229 const char *bootdelay_process(void)
 230 {
 231         char *s;
 232         int bootdelay;
 233 #ifdef CONFIG_BOOTCOUNT_LIMIT
 234         unsigned long bootcount = 0;
 235         unsigned long bootlimit = 0;
 236 #endif /* CONFIG_BOOTCOUNT_LIMIT */
 237
 238 #ifdef CONFIG_BOOTCOUNT_LIMIT
 239         bootcount = bootcount_load();
 240         bootcount++;
 241         bootcount_store(bootcount);
 242         setenv_ulong("bootcount", bootcount);
 243         bootlimit = getenv_ulong("bootlimit", 10, 0);
 244 #endif /* CONFIG_BOOTCOUNT_LIMIT */
 245
 246         s = getenv("bootdelay");
 247         bootdelay = s ? (int)simple_strtol(s, NULL, 10) : CONFIG_BOOTDELAY;
 248
 249 #ifdef CONFIG_OF_CONTROL
 250         bootdelay = fdtdec_get_config_int(gd->fdt_blob, "bootdelay",
 251                         bootdelay);
 252 #endif
 253
 254         debug("### main_loop entered: bootdelay=%d\n\n", bootdelay);
 255
 256 #if defined(CONFIG_MENU_SHOW)
 257         bootdelay = menu_show(bootdelay);
 258 #endif
 259         bootretry_init_cmd_timeout();
 260
 261 #ifdef CONFIG_POST
 262         if (gd->flags & GD_FLG_POSTFAIL) {
 263                 s = getenv("failbootcmd");
 264         } else
 265 #endif /* CONFIG_POST */
 266 #ifdef CONFIG_BOOTCOUNT_LIMIT
 267         if (bootlimit && (bootcount > bootlimit)) {
 268                 printf("Warning: Bootlimit (%u) exceeded. Using altbootcmd.\n",
 269                        (unsigned)bootlimit);
 270                 s = getenv("altbootcmd");
 271         } else
 272 #endif /* CONFIG_BOOTCOUNT_LIMIT */
 273                 s = getenv("bootcmd");
 274
 275         process_fdt_options(gd->fdt_blob);
 276         stored_bootdelay = bootdelay;
 277
 278         return s;
 279 }
 280
 281 void autoboot_command(const char *s)
 282 {
 283         debug("### main_loop: bootcmd=\"%s\"\n", s ? s : "<UNDEFINED>");
 284
 285         if (stored_bootdelay != -1 && s && !abortboot(stored_bootdelay)) {
 286 #if defined(CONFIG_AUTOBOOT_KEYED) && !defined(CONFIG_AUTOBOOT_KEYED_CTRLC)
 287                 int prev = disable_ctrlc(1);    /* disable Control C checking */
 288 #endif
 289
 290                 run_command_list(s, -1, 0);
 291
 292 #if defined(CONFIG_AUTOBOOT_KEYED) && !defined(CONFIG_AUTOBOOT_KEYED_CTRLC)
 293                 disable_ctrlc(prev);    /* restore Control C checking */
 294 #endif
 295         }
 296
 297 #ifdef CONFIG_MENUKEY
 298         if (menukey == CONFIG_MENUKEY) {
 299                 s = getenv("menucmd");
 300                 if (s)
 301                         run_command_list(s, -1, 0);
 302         }
 303 #endif /* CONFIG_MENUKEY */
 304 }