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 <malloc.h>
  14 #include <version.h>
  15
  16 DECLARE_GLOBAL_DATA_PTR;
  17
  18 /*
  19  * Board-specific Platform code can reimplement show_boot_progress () if needed
  20  */
  21 void inline __show_boot_progress (int val) {}
  22 void show_boot_progress (int val) __attribute__((weak, alias("__show_boot_progress")));
  23
  24 static void modem_init(void)
  25 {
  26 #ifdef CONFIG_MODEM_SUPPORT
  27         debug("DEBUG: main_loop:   gd->do_mdm_init=%lu\n", gd->do_mdm_init);
  28         if (gd->do_mdm_init) {
  29                 char *str = strdup(getenv("mdm_cmd"));
  30                 setenv("preboot", str);  /* set or delete definition */
  31                 if (str != NULL)
  32                         free(str);
  33                 mdm_init(); /* wait for modem connection */
  34         }
  35 #endif  /* CONFIG_MODEM_SUPPORT */
  36 }
  37
  38 static void run_preboot_environment_command(void)
  39 {
  40 #ifdef CONFIG_PREBOOT
  41         char *p;
  42
  43         p = getenv("preboot");
  44         if (p != NULL) {
  45 # ifdef CONFIG_AUTOBOOT_KEYED
  46                 int prev = disable_ctrlc(1);    /* disable Control C checking */
  47 # endif
  48
  49                 run_command_list(p, -1, 0);
  50
  51 # ifdef CONFIG_AUTOBOOT_KEYED
  52                 disable_ctrlc(prev);    /* restore Control C checking */
  53 # endif
  54         }
  55 #endif /* CONFIG_PREBOOT */
  56 }
  57
  58 void main_loop(void)
  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         bootdelay_process();
  82         /*
  83          * Main Loop for Monitor Command Processing
  84          */
  85
  86         cli_loop();
  87 }