target/linux/etrax-2.6/image/boot_linux

   1 #!/usr/bin/perl -w
   2
   3 #*****************************************************************************
   4 #!
   5 #! FILE NAME  : boot_linux
   6 #!
   7 #! PARAMETERS : -b <bootimage>     the name of the boot image to use
   8 #!              -d <device>        the interface to use, e.g., eth1
   9 #!                                 (defaults is eth0)
  10 #!              -f                 save it in flash memory at address 0x10000
  11 #!              -F                 save it in flash memory at address 0
  12 #!              -h                 show some help
  13 #!              -i <image>         name of the image to use (default is fimage)
  14 #!              -o <offset>        the offset in the flash where the flashing
  15 #!                                 starts
  16 #!              -O <offset>        the offset in the image file where the
  17 #!                                 flashing starts from
  18 #!              -p                 print the resulting etrax100boot command
  19 #!                                 instead of executing it
  20 #!              -s <size>          how much to flash (default is the size of
  21 #!                                 the flash minus the offset specified using
  22 #!                                 -o or -f)
  23 #!              -S <size>          the size of the flash
  24 #!
  25 #!              All sizes and offsets above can be specified as decimal
  26 #!              numbers, or as hexadecimal numbers by prefixing them with 0x.
  27 #!              It is also possible to use the suffixes k and M to specify
  28 #!              kilo (1024) or mega (1048576).
  29 #!
  30 #! DESCRIPTION: Extract the start of the image and any registers that should
  31 #!              be set from the kimage or fimage file, and then boot it.
  32 #!
  33 #! FUNCTIONS  : convert_size
  34 #!              extract_hw_settings
  35 #!              get_dword
  36 #!              calculate_sdram_init
  37 #!              sdram_command
  38 #!              print_help
  39 #!
  40 #!----------------------------------------------------------------------------
  41 #! HISTORY
  42 #!
  43 #! $Log: boot_linux,v $
  44 #! Revision 1.16  2004/11/01 16:32:27  starvik
  45 #! Corrected help text to avoid confusion
  46 #!
  47 #! Revision 1.15  2003/01/29 11:48:57  pkj
  48 #! Calculate a flash size large enough for the given image if the
  49 #! -S option is not specified.
  50 #!
  51 #! Revision 1.14  2002/11/18 14:40:09  pkj
  52 #! Make use of the --loop option to etrax100boot when initialising
  53 #! SDRAM memories. This requires a lot fewer options to be passed
  54 #! to the boot loader.
  55 #!
  56 #! Revision 1.13  2002/08/15 16:29:02  pkj
  57 #! * The -S option now accepts the size in bytes (just like the -s option).
  58 #!   For backwards compatibility it still assumes sizes of 16 and less to
  59 #!   be specified in MB.
  60 #! * The suffixes k and M can now be used with all sizes and offsets to
  61 #!   specify them in kilo or mega.
  62 #!
  63 #! Revision 1.12  2002/08/15 15:27:34  pkj
  64 #! Use $opts{'x'} instead of $opt_x.
  65 #!
  66 #! Revision 1.11  2002/07/04 17:06:39  pkj
  67 #! * No longer specifies a bootfile by default (not needed any longer).
  68 #! * Implemented option -b to specify a bootfile.
  69 #! * Removed references to option -l (it was never implemented).
  70 #!
  71 #! Revision 1.10  2002/06/04 11:50:23  starvik
  72 #! Check if mrs_data is specified in kernelconfig (necessary for MCM)
  73 #!
  74 #! Revision 1.9  2002/01/29 10:38:26  pkj
  75 #! Change illegal to invalid.
  76 #!
  77 #! Revision 1.8  2001/09/13 12:32:10  pkj
  78 #! * Added option -S to specify the size of the flash (in MB),  as -s
  79 #!   is used to specify how much to flash nowadays.
  80 #! * Made the default size of the flash depend on the size of the image
  81 #!   file. If it is bigger than 0x200100 then the flash is assumed to
  82 #!   be 4 MB, otherwise it is assumed to be 2 MB.
  83 #! * Added verification of various options.
  84 #!
  85 #! Revision 1.7  2001/09/13 10:25:11  pkj
  86 #! Minor clean-up.
  87 #!
  88 #! Revision 1.6  2001/06/29 10:05:16  pkj
  89 #! Corrected check for SDRAM.
  90 #!
  91 #! Revision 1.5  2001/06/29 09:11:55  pkj
  92 #! Synchronised boot_elinux and boot_linux.
  93 #!
  94 #!----------------------------------------------------------------------------
  95 #! (C) Copyright 2001, Axis Communications AB, LUND, SWEDEN
  96 #!****************************************************************************
  97 # $Id: boot_linux,v 1.16 2004/11/01 16:32:27 starvik Exp $
  98
  99 #****************** INCLUDE FILES SECTION ************************************
 100
 101 use strict;
 102
 103 use Getopt::Std;
 104 use File::Basename;
 105
 106 #****************** VARIABLE DECLARATION SECTION *****************************
 107
 108 use vars qw($my_name %opts);
 109 use vars qw($text_start $cmd);
 110 use vars qw($image_name $image_size);
 111 use vars qw($offset $source_offset $flash_size $flashing_size);
 112 use vars qw($sdram_timing_address $sdram_config_address);
 113 use vars qw($sdram_precharge $sdram_nop $sdram_refresh $sdram_mrs);
 114
 115 #****************** CONSTANT SECTION *****************************************
 116
 117 # Register addresses
 118 $sdram_timing_address = "b0000008";
 119 $sdram_config_address = "b000000c";
 120
 121 # SDRAM commands
 122 $sdram_precharge = 3;
 123 $sdram_nop = 0;
 124 $sdram_refresh = 2;
 125 $sdram_mrs = 1;
 126
 127 #****************** MAIN PROGRAM SECTION *************************************
 128
 129 # The name of this program.
 130 $my_name = basename($0);
 131
 132 # Get options
 133 getopts('b:d:fFhi:o:O:ps:S:', \%opts);
 134
 135 &print_help if ($opts{'h'});
 136
 137 # Name and existance of the image
 138 $image_name = ($opts{'i'} ? $opts{'i'} : 'fimage');
 139 die "Could not find the image $image_name!\n" unless (-s $image_name);
 140
 141 if ($opts{'f'} || $opts{'F'})
 142 {
 143   $image_size = -s $image_name;
 144
 145   $offset = ($opts{'f'} ? 0x10000 : 0);
 146
 147   $offset = &convert_size($opts{'o'}) if (defined($opts{'o'}));
 148
 149   die("$my_name: Invalid destination offset\n") if ($offset !~ /^\d+$/);
 150
 151   my $base_name = basename($image_name);
 152   if ($base_name eq 'timage' || $base_name eq 'flash1.img')
 153   {
 154     $source_offset = 0;
 155   }
 156   else
 157   {
 158     $source_offset = $offset;
 159   }
 160
 161   $source_offset = &convert_size($opts{'O'}) if (defined($opts{'O'}));
 162
 163   die("$my_name: Invalid source offset\n") if ($source_offset !~ /^\d+$/);
 164   die("$my_name: Source offset > image size\n") if ($source_offset > $image_size);
 165
 166   if (defined($opts{'S'}))
 167   {
 168     # Backwards compatibility to allow specifying the flash size in MB
 169     # without using an M suffix
 170     $opts{'S'} .= 'M' if ($opts{'S'} =~ /^\d+$/ && $opts{'S'} <= 16);
 171
 172     $flash_size = &convert_size($opts{'S'});
 173   }
 174   else
 175   {
 176     # Calculate a flash size large enough for the image without the checksum
 177     # and HWID.
 178     $flash_size = ($image_size - $source_offset + $offset) & 0xFFFF0000;
 179   }
 180
 181   die("$my_name: Invalid flash size\n") if ($flash_size !~ /^\d+$/);
 182   die("$my_name: Destination offset > flash size\n") if ($offset > $flash_size);
 183   if (defined($opts{'s'}))
 184   {
 185     $flashing_size = &convert_size($opts{'s'});
 186   }
 187   else
 188   {
 189     $flashing_size = $flash_size - $offset;
 190   }
 191
 192   die("$my_name: Invalid size to flash\n") if ($flashing_size !~ /^\d+$/);
 193
 194   if ($flashing_size > $flash_size - $offset)
 195   {
 196     $flashing_size = $flash_size - $offset;
 197     printf("Warning: Flashing size limited to 0x%lx due to the offset (0x%lx) and flash size (0x%lx).\n", $flashing_size, $offset, $flash_size);
 198   }
 199
 200   if ($flashing_size > $image_size - $source_offset)
 201   {
 202     $flashing_size = $image_size - $source_offset;
 203     printf("Warning: Flashing size limited to 0x%lx due to the offset (0x%lx) and image size (0x%lx).\n", $flashing_size, $source_offset, $image_size);
 204   }
 205 }
 206
 207 # Create the command line to boot the image
 208 if (system('./etrax100boot --help > /dev/null') == 0)
 209 {
 210   $cmd = './etrax100boot';
 211 }
 212 elsif (system('svinto_boot --help > /dev/null') == 0)
 213 {
 214   $cmd = 'svinto_boot';
 215 }
 216 else
 217 {
 218   die("Cannot find e100boot program in your PATH!\n");
 219 }
 220
 221 $cmd .= " --device $opts{'d'}" if ($opts{'d'});
 222
 223 $cmd .= &extract_hw_settings;
 224
 225 $cmd .= " --bootfile $opts{'b'}" if ($opts{'b'});
 226 $cmd .= " --file $image_name $text_start";
 227
 228 if ($opts{'f'} || $opts{'F'})
 229 {
 230   $cmd .= sprintf(" --flash %lx %lx %lx --jump 0",
 231                   hex($text_start) + $source_offset, $offset, $flashing_size);
 232 }
 233 else
 234 {
 235   $cmd .= " --jump $text_start";
 236 }
 237
 238 if ($opts{'p'})
 239 {
 240   print "Command:\n$cmd\n";
 241 }
 242 else
 243 {
 244   system($cmd);
 245 }
 246
 247 exit 0;
 248
 249 #****************** FUNCTION DEFINITION SECTION ******************************
 250
 251 #*****************************************************************************
 252 ##
 253 ## FUNCTION NAME: convert_size
 254 ##
 255 ##****************************************************************************
 256
 257 sub convert_size
 258 {
 259   my($arg) = @_;
 260   my $size;
 261
 262   if ($arg =~ /^0x([\da-fA-F]+)([kM])?$/)
 263   {
 264     $size = hex($1);
 265   }
 266   elsif ($arg =~ /^(\d+)([kM])?$/)
 267   {
 268     $size = $1;
 269   }
 270   else
 271   {
 272     return -1;
 273   }
 274
 275   if (!defined($2))
 276   {
 277     return $size;
 278   }
 279   elsif ($2 eq 'k')
 280   {
 281     return $size * 1024;
 282   }
 283   elsif ($2 eq 'M')
 284   {
 285     return $size * 1048576;
 286   }
 287 }
 288
 289 #*****************************************************************************
 290 ##
 291 ## FUNCTION NAME: extract_hw_settings
 292 ##
 293 ##****************************************************************************
 294
 295 sub extract_hw_settings
 296 {
 297   my $data;
 298   my $dbg_port;
 299   my $sdram_enabled;
 300   my $return_value = "";
 301   my $sdram_config;
 302
 303   # The hw information table has the following format
 304   #
 305   # "HW_PARAM_MAGIC"
 306   # text_start (dword)
 307   # serial debg port (dword)
 308   # sdram enabled (dword)
 309   # register address (dword)
 310   # register value (dword)
 311   # ...
 312   # 0
 313
 314   open(FILE, "$image_name") || die("Could not open '$image_name'");
 315
 316   while (<FILE>)
 317   {
 318     if (m/HW_PARAM_MAGIC/g)
 319     {
 320       # Seek to first byte after magic
 321       seek(FILE, -length($_) + pos($_), 1);
 322       last;
 323     }
 324   }
 325
 326   $text_start = &get_dword;
 327   $dbg_port = &get_dword;
 328   $sdram_enabled = int(&get_dword);
 329
 330   while (1)
 331   {
 332     my $register = &get_dword;
 333     my $value = &get_dword;
 334
 335     last if ($register eq "00000000");
 336
 337     if ($sdram_enabled)
 338     {
 339       if ($register eq $sdram_config_address)
 340       {
 341         $sdram_config = $value;
 342       }
 343       elsif ($register eq $sdram_timing_address)
 344       {
 345         $return_value .= &calculate_sdram_init($value, $sdram_config);
 346         next;
 347       }
 348     }
 349
 350     $return_value .= " --setreg $register $value";
 351   }
 352
 353   close(FILE);
 354
 355   return $return_value;
 356 }
 357
 358 #*****************************************************************************
 359 ##
 360 ## FUNCTION NAME: get_dword
 361 ##
 362 ##****************************************************************************
 363
 364 sub get_dword
 365 {
 366   my $data;
 367
 368   read(FILE, $data, 4);
 369   return unpack("H8", pack("V", unpack("N", $data)));
 370 }
 371
 372 #*****************************************************************************
 373 ##
 374 ## FUNCTION NAME: calculate_sdram_init
 375 ##
 376 ##****************************************************************************
 377
 378 sub calculate_sdram_init
 379 {
 380   # Refer to ETRAX 100LX Designers Reference for a description of SDRAM
 381   # initialization
 382   my $sdram_init_val = hex($_[0]);
 383   my $sdram_config_val = hex($_[1]);
 384   my $bus_width = $sdram_config_val & 0x00800000;
 385   my $speed;
 386   my $cas_latency;
 387   my $mrs_data;
 388   my $temp;
 389   my $return_value;
 390   my $value;
 391
 392   $mrs_data = ($sdram_init_val & 0x00ff0000) >> 16;
 393   $sdram_init_val &= 0x8000ffff; # Make sure mrs data is 0
 394   $sdram_init_val |= 0x80000000; # Make sure sdram is enabled
 395   $speed = $sdram_init_val & 0x1000;
 396   $cas_latency = $sdram_init_val & 0x3;
 397   if ($speed) # 100 MHz
 398   {
 399     $cas_latency += 2;
 400   }
 401   else # 50 MHz
 402   {
 403     $cas_latency += 1;
 404   }
 405
 406   # Calculate value of mrs_data
 407   # CAS latency = 2 && bus_width = 32 => 0x40
 408   # CAS latency = 3 && bus_width = 32 => 0x60
 409   # CAS latency = 2 && bus_width = 16 => 0x20
 410   # CAS latency = 3 && bus_width = 16 => 0x30
 411   if ($mrs_data == 0)
 412   {
 413     if ($bus_width == 0) # 16 bits
 414     {
 415       $mrs_data = $cas_latency == 2 ? 0x20 : 0x30;
 416     }
 417     else # 32 bits
 418     {
 419       $mrs_data = $cas_latency == 2 ? 0x40 : 0x60;
 420     }
 421   }
 422
 423   $temp = $sdram_init_val | 0x0000c000; # Disable refresh
 424   $return_value .= &sdram_command($temp);
 425   $return_value .= " --pause 20000";
 426
 427   $return_value .= &sdram_command($temp, $sdram_precharge);
 428   $return_value .= &sdram_command($temp, $sdram_nop);
 429
 430   $return_value .= " --setreg +0 7";
 431   $return_value .= " --label label1";
 432   $return_value .= &sdram_command($temp, $sdram_refresh);
 433   $return_value .= &sdram_command($temp, $sdram_nop);
 434   $return_value .= " --loop +0 label1";
 435
 436   $return_value .= &sdram_command($temp, $sdram_mrs, $mrs_data);
 437   $return_value .= &sdram_command($temp, $sdram_nop);
 438
 439   $return_value .= &sdram_command($sdram_init_val);
 440
 441   return $return_value;
 442 }
 443
 444 #*****************************************************************************
 445 ##
 446 ## FUNCTION NAME: sdram_command
 447 ##
 448 ##****************************************************************************
 449
 450 sub sdram_command
 451 {
 452   my($temp, $value, $mrs_data) = @_;
 453
 454   $value ||= 0;
 455   if ($value == $sdram_mrs)
 456   {
 457     $value = sprintf("%lx", $temp | ($value << 9) | ($mrs_data << 16));
 458   }
 459   else
 460   {
 461     $value = sprintf("%lx", $temp | ($value << 9));
 462   }
 463
 464   return " --setreg $sdram_timing_address $value";
 465 }
 466
 467 #*****************************************************************************
 468 ##
 469 ## FUNCTION NAME: print_help
 470 ##
 471 ##****************************************************************************
 472
 473 sub print_help
 474 {
 475   print "\nAXIS $my_name, ", '$Revision: 1.16 $ $Date: 2004/11/01 16:32:27 $ ', "\n";
 476   die <<EOT;
 477 Copyright (C) 2001-2002 Axis Communications AB
 478
 479 DESCRIPTION:
 480   This program is used to boot (and flash) a linux image to a box.
 481   It tries to extract the required ETRAX 100 settings from the image file.
 482
 483 SYNTAX:
 484   $my_name [options]
 485
 486 OPTIONS:
 487   -b <bootfile>           : The boot image to use.
 488   -d <device>             : The network interface to use, default is eth0.
 489   -f                      : Save the image in the flash memory starting at
 490                             address 0x10000.
 491   -F                      : Save the image in the flash memory starting at
 492                             address 0.
 493   -h                      : Print this help text.
 494   -i <image>              : The path and name of the image to use, default
 495                             is fimage.
 496   -o <offset>             : The offset in the flash where the flashing starts.
 497   -O <offset>             : The offset in the image file where the flashing
 498                             starts from.
 499   -p                      : Print the resulting etrax100boot command instead
 500                             of executing it.
 501   -s <size>               : How much to flash (default is the size of the
 502                             flash minus the offset specified using -o or -f).
 503   -S <size>               : The size of the flash.
 504
 505   All sizes and offsets above can be specified as decimal numbers, or as
 506   hexadecimal numbers by prefixing them with 0x. It is also possible to use
 507   the suffixes k and M to specify kilo (1024) or mega (1048576).
 508
 509 EOT
 510 }
 511
 512 #****************** END OF FILE boot_linux ***********************************