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