src/core/main.c

   1 /**************************************************************************
   2 Etherboot -  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         NFS - RFC1094, RFC1813 (v3, useful for clarifications, not implemented)
  13         IGMP - RFC1112
  14
  15 **************************************************************************/
  16
  17 #include <gpxe/heap.h>
  18 #include <gpxe/init.h>
  19 #include <gpxe/device.h>
  20 #include <gpxe/shell.h>
  21 #include <gpxe/shell_banner.h>
  22 #include <gpxe/shutdown.h>
  23 #include <gpxe/hidemem.h>
  24 #include <usr/autoboot.h>
  25
  26 /**
  27  * Start up Etherboot
  28  *
  29  * Call this function only once, before doing (almost) anything else.
  30  */
  31 static void startup ( void ) {
  32         hide_etherboot();
  33         init_heap();
  34         call_init_fns();
  35         probe_devices();
  36 }
  37
  38 /**
  39  * Shut down Etherboot
  40  *
  41  * Call this function only once, before either exiting main() or
  42  * starting up a non-returnable image.
  43  */
  44 void shutdown ( void ) {
  45         remove_devices();
  46         call_exit_fns();
  47         unhide_etherboot();
  48 }
  49
  50 /**
  51  * Main entry point
  52  *
  53  * @ret rc              Return status code
  54  */
  55 int main ( void ) {
  56
  57         startup();
  58
  59         /* Try autobooting if we're not going straight to the shell */
  60         if ( ! shell_banner() ) {
  61                 autoboot();
  62         }
  63
  64         /* Autobooting failed or the user wanted the shell */
  65         shell();
  66
  67         shutdown();
  68
  69         return 0;
  70 }