common/main.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 /* #define      DEBUG   */
   9
  10 #include <common.h>
  11 #include <autoboot.h>
  12 #include <cli.h>
  13 #include <version.h>
  14
  15 DECLARE_GLOBAL_DATA_PTR;
  16
  17 /*
  18  * Board-specific Platform code can reimplement show_boot_progress () if needed
  19  */
  20 void inline __show_boot_progress (int val) {}
  21 void show_boot_progress (int val) __attribute__((weak, alias("__show_boot_progress")));
  22
  23 static void modem_init(void)
  24 {
  25 #ifdef CONFIG_MODEM_SUPPORT
  26         debug("DEBUG: main_loop:   gd->do_mdm_init=%lu\n", gd->do_mdm_init);
  27         if (gd->do_mdm_init) {
  28                 char *str = getenv("mdm_cmd");
  29
  30                 setenv("preboot", str);  /* set or delete definition */
  31                 mdm_init(); /* wait for modem connection */
  32         }
  33 #endif  /* CONFIG_MODEM_SUPPORT */
  34 }
  35
  36 static void run_preboot_environment_command(void)
  37 {
  38 #ifdef CONFIG_PREBOOT
  39         char *p;
  40
  41         p = getenv("preboot");
  42         if (p != NULL) {
  43 # ifdef CONFIG_AUTOBOOT_KEYED
  44                 int prev = disable_ctrlc(1);    /* disable Control C checking */
  45 # endif
  46
  47                 run_command_list(p, -1, 0);
  48
  49 # ifdef CONFIG_AUTOBOOT_KEYED
  50                 disable_ctrlc(prev);    /* restore Control C checking */
  51 # endif
  52         }
  53 #endif /* CONFIG_PREBOOT */
  54 }
  55
  56 /* We come here after U-Boot is initialised and ready to process commands */
  57 void main_loop(void)
  58 {
  59         const char *s;
  60
  61         bootstage_mark_name(BOOTSTAGE_ID_MAIN_LOOP, "main_loop");
  62
  63 #ifndef CONFIG_SYS_GENERIC_BOARD
  64         puts("Warning: Your board does not use generic board. Please read\n");
  65         puts("doc/README.generic-board and take action. Boards not\n");
  66         puts("upgraded by the late 2014 may break or be removed.\n");
  67 #endif
  68
  69         modem_init();
  70 #ifdef CONFIG_VERSION_VARIABLE
  71         setenv("ver", version_string);  /* set version variable */
  72 #endif /* CONFIG_VERSION_VARIABLE */
  73
  74         cli_init();
  75
  76         run_preboot_environment_command();
  77
  78 #if defined(CONFIG_UPDATE_TFTP)
  79         update_tftp(0UL);
  80 #endif /* CONFIG_UPDATE_TFTP */
  81
  82         s = bootdelay_process();
  83         if (cli_process_fdt(&s))
  84                 cli_secure_boot_cmd(s);
  85
  86         autoboot_command(s);
  87
  88         cli_loop();
  89 }