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 /* #define MDEBUG */
  18
  19 #include "etherboot.h"
  20 #include "dev.h"
  21 #include "nic.h"
  22 #include "disk.h"
  23 #include "timer.h"
  24 #include "cpu.h"
  25 #include "cmdline.h"
  26 #include "console.h"
  27 #include <gpxe/init.h>
  28 #include "image.h"
  29 #include <stdarg.h>
  30
  31 #include <gpxe/device.h>
  32 #include <gpxe/heap.h>
  33 #include <gpxe/netdevice.h>
  34
  35 /* Linker symbols */
  36 extern char _bss[], _ebss[];
  37
  38 jmp_buf restart_etherboot;
  39 int     url_port;
  40
  41 char as_main_program = 1;
  42
  43 #if 0
  44
  45 static inline unsigned long ask_boot(unsigned *index)
  46 {
  47         unsigned long order = DEFAULT_BOOT_ORDER;
  48         *index = DEFAULT_BOOT_INDEX;
  49 #ifdef LINUXBIOS
  50         order = get_boot_order(order, index);
  51 #endif
  52 #if defined(ASK_BOOT)
  53 #if ASK_BOOT >= 0
  54         while(1) {
  55                 int c = 0;
  56                 printf(ASK_PROMPT);
  57 #if ASK_BOOT > 0
  58                 {
  59                         unsigned long time;
  60                         for ( time = currticks() + ASK_BOOT*TICKS_PER_SEC;
  61                               !c && !iskey(); ) {
  62                                 if (currticks() > time) c = ANS_DEFAULT;
  63                         }
  64                 }
  65 #endif /* ASK_BOOT > 0 */
  66                 if ( !c ) c = getchar();
  67                 if ((c >= 'a') && (c <= 'z')) c &= 0x5F;
  68                 if ((c >= ' ') && (c <= '~')) putchar(c);
  69                 putchar('\n');
  70
  71                 switch(c) {
  72                 default:
  73                         /* Nothing useful try again */
  74                         continue;
  75                 case ANS_QUIT:
  76                         order = BOOT_NOTHING;
  77                         *index = 0;
  78                         break;
  79                 case ANS_DEFAULT:
  80                         /* Preserve the default boot order */
  81                         break;
  82                 case ANS_NETWORK:
  83                         order = (BOOT_NIC     << (0*BOOT_BITS)) |
  84                                 (BOOT_NOTHING << (1*BOOT_BITS));
  85                         *index = 0;
  86                         break;
  87                 case ANS_DISK:
  88                         order = (BOOT_DISK    << (0*BOOT_BITS)) |
  89                                 (BOOT_NOTHING << (1*BOOT_BITS));
  90                         *index = 0;
  91                         break;
  92                 case ANS_FLOPPY:
  93                         order = (BOOT_FLOPPY  << (0*BOOT_BITS)) |
  94                                 (BOOT_NOTHING << (1*BOOT_BITS));
  95                         *index = 0;
  96                         break;
  97                 }
  98                 break;
  99         }
 100         putchar('\n');
 101 #endif /* ASK_BOOT >= 0 */
 102 #endif /* defined(ASK_BOOT) */
 103         return order;
 104 }
 105
 106 static inline void try_floppy_first(void)
 107 {
 108 #if (TRY_FLOPPY_FIRST > 0)
 109         int i;
 110         printf("Trying floppy");
 111         disk_init();
 112         for (i = TRY_FLOPPY_FIRST; i-- > 0; ) {
 113                 putchar('.');
 114                 if (pcbios_disk_read(0, 0, 0, 0, ((char *)FLOPPY_BOOT_LOCATION)) != 0x8000) {
 115                         printf("using floppy\n");
 116                         exit(0);
 117                 }
 118         }
 119         printf("no floppy\n");
 120 #endif /* TRY_FLOPPY_FIRST */
 121 }
 122
 123 static struct class_operations {
 124         struct dev *dev;
 125         int (*probe)(struct dev *dev);
 126         int (*load_configuration)(struct dev *dev);
 127         int (*load)(struct dev *dev);
 128 }
 129 operations[] = {
 130         { &nic.dev,  eth_probe,  eth_load_configuration,  eth_load  },
 131         { &disk.dev, disk_probe, disk_load_configuration, disk_load },
 132         { &disk.dev, disk_probe, disk_load_configuration, disk_load },
 133 };
 134
 135 #endif
 136
 137
 138
 139 static int main_loop(int state);
 140 static int exit_ok;
 141 static int exit_status;
 142 static int initialized;
 143
 144
 145 /**************************************************************************
 146 MAIN - Kick off routine
 147 **************************************************************************/
 148 int main ( void ) {
 149         struct net_device *netdev;
 150
 151         /* Call all registered initialisation functions */
 152         init_heap();
 153         call_init_fns ();
 154         probe_devices();
 155
 156         netdev = next_netdev ();
 157         if ( netdev ) {
 158                 test_dhcp ( netdev );
 159                 //cmdl_start();
 160         } else {
 161                 printf ( "No network device found\n" );
 162         }
 163
 164         printf ( "Press any key to exit\n" );
 165         getchar();
 166
 167         remove_devices();
 168         call_exit_fns ();
 169
 170         return exit_status;
 171 }
 172
 173 #if 0
 174
 175 void exit(int status)
 176 {
 177         while(!exit_ok)
 178                 ;
 179         exit_status = status;
 180         longjmp(restart_etherboot, 255);
 181 }
 182
 183
 184
 185 static int main_loop(int state)
 186 {
 187         /* Splitting main into 2 pieces makes the semantics of
 188          * which variables are preserved across a longjmp clean
 189          * and predictable.
 190          */
 191         static unsigned long order;
 192         static unsigned boot_index;
 193         static struct dev * dev = 0;
 194         static struct class_operations *ops;
 195         static int type;
 196         static int i;
 197
 198         if (!initialized) {
 199                 initialized = 1;
 200                 if (dev && (state >= 1) && (state <= 2)) {
 201                         dev->how_probe = PROBE_AWAKE;
 202                         dev->how_probe = ops->probe(dev);
 203                         if (dev->how_probe == PROBE_FAILED) {
 204                                 state = -1;
 205                         }
 206                         if (state == 1) {
 207                                 /* The bootp reply might have been changed, re-parse.  */
 208                                 decode_rfc1533(bootp_data.bootp_reply.bp_vend, 0,
 209 #ifdef  NO_DHCP_SUPPORT
 210                                                BOOTP_VENDOR_LEN + MAX_BOOTP_EXTLEN,
 211 #else
 212                                                DHCP_OPT_LEN + MAX_BOOTP_EXTLEN,
 213 #endif  /* NO_DHCP_SUPPORT */
 214                                                1);
 215                         }
 216                 }
 217         }
 218         switch(state) {
 219         case 0:
 220         {
 221                 static int firsttime = 1;
 222                 /* First time through */
 223                 if (firsttime) {
 224                         cleanup();
 225                         firsttime = 0;
 226                 }
 227 #ifdef  EXIT_IF_NO_OFFER
 228                 else {
 229                         cleanup();
 230                         exit(0);
 231                 }
 232 #endif
 233                 i = -1;
 234                 state = 4;
 235                 dev = 0;
 236
 237                 /* We just called setjmp ... */
 238                 order = ask_boot(&boot_index);
 239                 try_floppy_first();
 240                 break;
 241         }
 242         case 4:
 243                 cleanup();
 244                 call_reset_fns();
 245                 /* Find a dev entry to probe with */
 246                 if (!dev) {
 247                         int boot;
 248                         int failsafe;
 249
 250                         /* Advance to the next device type */
 251                         i++;
 252                         boot = (order >> (i * BOOT_BITS)) & BOOT_MASK;
 253                         type = boot & BOOT_TYPE_MASK;
 254                         failsafe = (boot & BOOT_FAILSAFE) != 0;
 255                         if (i >= MAX_BOOT_ENTRIES) {
 256                                 type = BOOT_NOTHING;
 257                         }
 258                         if ((i == 0) && (type == BOOT_NOTHING)) {
 259                                 /* Return to caller */
 260                                 exit(0);
 261                         }
 262                         if (type >= BOOT_NOTHING) {
 263                                 interruptible_sleep(2);
 264                                 state = 0;
 265                                 break;
 266                         }
 267                         ops = &operations[type];
 268                         dev = ops->dev;
 269                         dev->how_probe = PROBE_FIRST;
 270                         dev->type = type;
 271                         dev->failsafe = failsafe;
 272                         dev->type_index = 0;
 273                 } else {
 274                         /* Advance to the next device of the same type */
 275                         dev->how_probe = PROBE_NEXT;
 276                 }
 277                 state = 3;
 278                 break;
 279         case 3:
 280                 state = -1;
 281                 /* Removed the following line because it was causing
 282                  * heap.o to be dragged in unnecessarily.  It's also
 283                  * slightly puzzling: by resetting heap_base, doesn't
 284                  * this mean that we permanently leak memory?
 285                  */
 286                 /* heap_base = allot(0); */
 287                 dev->how_probe = ops->probe(dev);
 288                 if (dev->how_probe == PROBE_FAILED) {
 289                         dev = 0;
 290                         state = 4;
 291                 } else if (boot_index && (i == 0) && (boot_index != (unsigned)dev->type_index)) {
 292                         printf("Wrong index\n");
 293                         state = 4;
 294                 }
 295                 else {
 296                         state = 2;
 297                 }
 298                 break;
 299         case 2:
 300                 state = -1;
 301                 if (ops->load_configuration(dev) >= 0) {
 302                         state = 1;
 303                 }
 304                 break;
 305         case 1:
 306                 /* Any return from load is a failure */
 307                 ops->load(dev);
 308                 state = -1;
 309                 break;
 310         case 256:
 311                 state = 0;
 312                 break;
 313         case -3:
 314                 i = MAX_BOOT_ENTRIES;
 315                 type = BOOT_NOTHING;
 316                 /* fall through */
 317         default:
 318                 printf("<abort>\n");
 319                 state = 4;
 320                 /* At the end goto state 0 */
 321                 if ((type >= BOOT_NOTHING) || (i >= MAX_BOOT_ENTRIES)) {
 322                         state = 0;
 323                 }
 324                 break;
 325         }
 326         return state;
 327 }
 328
 329
 330 #endif
 331
 332
 333 /**************************************************************************
 334 LOADKERNEL - Try to load kernel image
 335 **************************************************************************/
 336 #if 0
 337 /* To be split out into individual files */
 338 static const struct proto protos[] = {
 339         { "x-tftm", url_tftm },
 340         { "x-slam", url_slam },
 341         { "nfs", nfs },
 342         { "file", url_file },
 343         { "tftp", tftp },
 344         { "http", http },
 345 };
 346 #endif
 347
 348 /**************************************************************************
 349 CLEANUP - shut down networking and console so that the OS may be called
 350 **************************************************************************/
 351 #if 0
 352 void cleanup(void)
 353 {
 354         /* Stop receiving packets */
 355         disable ( &dev );
 356         initialized = 0;
 357 }
 358 #endif
 359
 360 /*
 361  * Local variables:
 362  *  c-basic-offset: 8
 363  * End:
 364  */