src/core/main.c

   1 /**************************************************************************
   2 gPXE -  Network Bootstrap Program
   3
   4 Literature dealing with the network protocols:
   5         ARP - RFC826
   6         RARP - RFC903
   7         UDP - RFC768
   8         BOOTP - RFC951, RFC2132 (vendor extensions)
   9         DHCP - RFC2131, RFC2132 (options)
  10         TFTP - RFC1350, RFC2347 (options), RFC2348 (blocksize), RFC2349 (tsize)
  11         RPC - RFC1831, RFC1832 (XDR), RFC1833 (rpcbind/portmapper)
  12
  13 **************************************************************************/
  14
  15 FILE_LICENCE ( GPL2_OR_LATER );
  16
  17 #include <stdio.h>
  18 #include <gpxe/init.h>
  19 #include <gpxe/features.h>
  20 #include <gpxe/shell.h>
  21 #include <gpxe/shell_banner.h>
  22 #include <gpxe/image.h>
  23 #include <usr/autoboot.h>
  24 #include <config/general.h>
  25
  26 #define NORMAL  "\033[0m"
  27 #define BOLD    "\033[1m"
  28 #define CYAN    "\033[36m"
  29
  30 /**
  31  * Main entry point
  32  *
  33  * @ret rc              Return status code
  34  */
  35 __asmcall int main ( void ) {
  36         struct feature *feature;
  37         struct image *image;
  38
  39         /* Some devices take an unreasonably long time to initialise */
  40         printf ( PRODUCT_SHORT_NAME " initialising devices..." );
  41         initialise();
  42         startup();
  43         printf ( "ok\n" );
  44
  45         /*
  46          * Print welcome banner
  47          *
  48          *
  49          * If you wish to brand this build of gPXE, please do so by
  50          * defining the string PRODUCT_NAME in config/general.h.
  51          *
  52          * While nothing in the GPL prevents you from removing all
  53          * references to gPXE or http://etherboot.org, we prefer you
  54          * not to do so.
  55          *
  56          */
  57         printf ( NORMAL "\n\n" PRODUCT_NAME "\n" BOLD "gPXE " VERSION
  58                  NORMAL " -- Open Source Boot Firmware -- "
  59                  CYAN "http://etherboot.org" NORMAL "\n"
  60                  "Features:" );
  61         for_each_table_entry ( feature, FEATURES )
  62                 printf ( " %s", feature->name );
  63         printf ( "\n" );
  64
  65         /* Prompt for shell */
  66         if ( shell_banner() ) {
  67                 /* User wants shell; just give them a shell */
  68                 shell();
  69         } else {
  70                 /* User doesn't want shell; load and execute the first
  71                  * image, or autoboot() if we have no images.  If
  72                  * booting fails for any reason, offer a second chance
  73                  * to enter the shell for diagnostics.
  74                  */
  75                 if ( have_images() ) {
  76                         for_each_image ( image ) {
  77                                 image_exec ( image );
  78                                 break;
  79                         }
  80                 } else {
  81                         autoboot();
  82                 }
  83
  84                 if ( shell_banner() )
  85                         shell();
  86         }
  87
  88         shutdown ( SHUTDOWN_EXIT | shutdown_exit_flags );
  89
  90         return 0;
  91 }