513 lines
14 KiB
Perl
Executable File
513 lines
14 KiB
Perl
Executable File
#!/usr/bin/perl -w
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#*****************************************************************************
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#!
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#! FILE NAME : boot_linux
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#!
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#! PARAMETERS : -b <bootimage> the name of the boot image to use
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#! -d <device> the interface to use, e.g., eth1
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#! (defaults is eth0)
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#! -f save it in flash memory at address 0x10000
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#! -F save it in flash memory at address 0
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#! -h show some help
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#! -i <image> name of the image to use (default is fimage)
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#! -o <offset> the offset in the flash where the flashing
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#! starts
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#! -O <offset> the offset in the image file where the
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#! flashing starts from
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#! -p print the resulting etrax100boot command
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#! instead of executing it
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#! -s <size> how much to flash (default is the size of
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#! the flash minus the offset specified using
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#! -o or -f)
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#! -S <size> the size of the flash
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#!
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#! All sizes and offsets above can be specified as decimal
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#! numbers, or as hexadecimal numbers by prefixing them with 0x.
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#! It is also possible to use the suffixes k and M to specify
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#! kilo (1024) or mega (1048576).
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#!
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#! DESCRIPTION: Extract the start of the image and any registers that should
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#! be set from the kimage or fimage file, and then boot it.
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#!
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#! FUNCTIONS : convert_size
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#! extract_hw_settings
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#! get_dword
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#! calculate_sdram_init
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#! sdram_command
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#! print_help
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#!
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#!----------------------------------------------------------------------------
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#! HISTORY
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#!
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#! $Log: boot_linux,v $
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#! Revision 1.16 2004/11/01 16:32:27 starvik
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#! Corrected help text to avoid confusion
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#!
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#! Revision 1.15 2003/01/29 11:48:57 pkj
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#! Calculate a flash size large enough for the given image if the
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#! -S option is not specified.
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#!
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#! Revision 1.14 2002/11/18 14:40:09 pkj
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#! Make use of the --loop option to etrax100boot when initialising
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#! SDRAM memories. This requires a lot fewer options to be passed
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#! to the boot loader.
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#!
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#! Revision 1.13 2002/08/15 16:29:02 pkj
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#! * The -S option now accepts the size in bytes (just like the -s option).
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#! For backwards compatibility it still assumes sizes of 16 and less to
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#! be specified in MB.
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#! * The suffixes k and M can now be used with all sizes and offsets to
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#! specify them in kilo or mega.
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#!
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#! Revision 1.12 2002/08/15 15:27:34 pkj
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#! Use $opts{'x'} instead of $opt_x.
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#!
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#! Revision 1.11 2002/07/04 17:06:39 pkj
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#! * No longer specifies a bootfile by default (not needed any longer).
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#! * Implemented option -b to specify a bootfile.
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#! * Removed references to option -l (it was never implemented).
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#!
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#! Revision 1.10 2002/06/04 11:50:23 starvik
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#! Check if mrs_data is specified in kernelconfig (necessary for MCM)
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#!
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#! Revision 1.9 2002/01/29 10:38:26 pkj
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#! Change illegal to invalid.
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#!
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#! Revision 1.8 2001/09/13 12:32:10 pkj
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#! * Added option -S to specify the size of the flash (in MB), as -s
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#! is used to specify how much to flash nowadays.
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#! * Made the default size of the flash depend on the size of the image
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#! file. If it is bigger than 0x200100 then the flash is assumed to
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#! be 4 MB, otherwise it is assumed to be 2 MB.
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#! * Added verification of various options.
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#!
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#! Revision 1.7 2001/09/13 10:25:11 pkj
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#! Minor clean-up.
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#!
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#! Revision 1.6 2001/06/29 10:05:16 pkj
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#! Corrected check for SDRAM.
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#!
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#! Revision 1.5 2001/06/29 09:11:55 pkj
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#! Synchronised boot_elinux and boot_linux.
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#!
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#!----------------------------------------------------------------------------
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#! (C) Copyright 2001, Axis Communications AB, LUND, SWEDEN
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#!****************************************************************************
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# $Id: boot_linux,v 1.16 2004/11/01 16:32:27 starvik Exp $
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#****************** INCLUDE FILES SECTION ************************************
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use strict;
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use Getopt::Std;
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use File::Basename;
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#****************** VARIABLE DECLARATION SECTION *****************************
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use vars qw($my_name %opts);
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use vars qw($text_start $cmd);
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use vars qw($image_name $image_size);
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use vars qw($offset $source_offset $flash_size $flashing_size);
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use vars qw($sdram_timing_address $sdram_config_address);
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use vars qw($sdram_precharge $sdram_nop $sdram_refresh $sdram_mrs);
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#****************** CONSTANT SECTION *****************************************
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# Register addresses
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$sdram_timing_address = "b0000008";
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$sdram_config_address = "b000000c";
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# SDRAM commands
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$sdram_precharge = 3;
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$sdram_nop = 0;
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$sdram_refresh = 2;
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$sdram_mrs = 1;
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#****************** MAIN PROGRAM SECTION *************************************
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# The name of this program.
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$my_name = basename($0);
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# Get options
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getopts('b:d:fFhi:o:O:ps:S:', \%opts);
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&print_help if ($opts{'h'});
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# Name and existance of the image
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$image_name = ($opts{'i'} ? $opts{'i'} : 'fimage');
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die "Could not find the image $image_name!\n" unless (-s $image_name);
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if ($opts{'f'} || $opts{'F'})
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{
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$image_size = -s $image_name;
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$offset = ($opts{'f'} ? 0x10000 : 0);
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$offset = &convert_size($opts{'o'}) if (defined($opts{'o'}));
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die("$my_name: Invalid destination offset\n") if ($offset !~ /^\d+$/);
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my $base_name = basename($image_name);
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if ($base_name eq 'timage' || $base_name eq 'flash1.img')
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{
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$source_offset = 0;
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}
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else
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{
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$source_offset = $offset;
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}
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$source_offset = &convert_size($opts{'O'}) if (defined($opts{'O'}));
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die("$my_name: Invalid source offset\n") if ($source_offset !~ /^\d+$/);
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die("$my_name: Source offset > image size\n") if ($source_offset > $image_size);
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if (defined($opts{'S'}))
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{
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# Backwards compatibility to allow specifying the flash size in MB
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# without using an M suffix
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$opts{'S'} .= 'M' if ($opts{'S'} =~ /^\d+$/ && $opts{'S'} <= 16);
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$flash_size = &convert_size($opts{'S'});
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}
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else
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{
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# Calculate a flash size large enough for the image without the checksum
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# and HWID.
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$flash_size = ($image_size - $source_offset + $offset) & 0xFFFF0000;
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}
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die("$my_name: Invalid flash size\n") if ($flash_size !~ /^\d+$/);
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die("$my_name: Destination offset > flash size\n") if ($offset > $flash_size);
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if (defined($opts{'s'}))
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{
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$flashing_size = &convert_size($opts{'s'});
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}
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else
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{
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$flashing_size = $flash_size - $offset;
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}
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die("$my_name: Invalid size to flash\n") if ($flashing_size !~ /^\d+$/);
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if ($flashing_size > $flash_size - $offset)
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{
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$flashing_size = $flash_size - $offset;
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printf("Warning: Flashing size limited to 0x%lx due to the offset (0x%lx) and flash size (0x%lx).\n", $flashing_size, $offset, $flash_size);
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}
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if ($flashing_size > $image_size - $source_offset)
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{
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$flashing_size = $image_size - $source_offset;
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printf("Warning: Flashing size limited to 0x%lx due to the offset (0x%lx) and image size (0x%lx).\n", $flashing_size, $source_offset, $image_size);
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}
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}
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# Create the command line to boot the image
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if (system('./etrax100boot --help > /dev/null') == 0)
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{
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$cmd = './etrax100boot';
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}
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elsif (system('svinto_boot --help > /dev/null') == 0)
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{
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$cmd = 'svinto_boot';
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}
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else
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{
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die("Cannot find e100boot program in your PATH!\n");
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}
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$cmd .= " --device $opts{'d'}" if ($opts{'d'});
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$cmd .= &extract_hw_settings;
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$cmd .= " --bootfile $opts{'b'}" if ($opts{'b'});
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$cmd .= " --file $image_name $text_start";
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if ($opts{'f'} || $opts{'F'})
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{
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$cmd .= sprintf(" --flash %lx %lx %lx --jump 0",
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hex($text_start) + $source_offset, $offset, $flashing_size);
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}
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else
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{
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$cmd .= " --jump $text_start";
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}
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if ($opts{'p'})
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{
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print "Command:\n$cmd\n";
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}
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else
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{
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system($cmd);
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}
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exit 0;
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#****************** FUNCTION DEFINITION SECTION ******************************
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#*****************************************************************************
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##
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## FUNCTION NAME: convert_size
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##
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##****************************************************************************
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sub convert_size
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{
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my($arg) = @_;
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my $size;
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if ($arg =~ /^0x([\da-fA-F]+)([kM])?$/)
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{
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$size = hex($1);
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}
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elsif ($arg =~ /^(\d+)([kM])?$/)
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{
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$size = $1;
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}
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else
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{
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return -1;
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}
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if (!defined($2))
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{
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return $size;
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}
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elsif ($2 eq 'k')
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{
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return $size * 1024;
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}
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elsif ($2 eq 'M')
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{
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return $size * 1048576;
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}
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}
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#*****************************************************************************
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##
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## FUNCTION NAME: extract_hw_settings
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##
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##****************************************************************************
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sub extract_hw_settings
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{
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my $data;
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my $dbg_port;
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my $sdram_enabled;
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my $return_value = "";
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my $sdram_config;
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# The hw information table has the following format
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#
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# "HW_PARAM_MAGIC"
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# text_start (dword)
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# serial debg port (dword)
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# sdram enabled (dword)
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# register address (dword)
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# register value (dword)
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# ...
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# 0
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open(FILE, "$image_name") || die("Could not open '$image_name'");
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while (<FILE>)
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{
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if (m/HW_PARAM_MAGIC/g)
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{
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# Seek to first byte after magic
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seek(FILE, -length($_) + pos($_), 1);
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last;
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}
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}
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$text_start = &get_dword;
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$dbg_port = &get_dword;
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$sdram_enabled = int(&get_dword);
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while (1)
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{
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my $register = &get_dword;
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my $value = &get_dword;
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last if ($register eq "00000000");
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if ($sdram_enabled)
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{
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if ($register eq $sdram_config_address)
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{
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$sdram_config = $value;
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}
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elsif ($register eq $sdram_timing_address)
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{
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$return_value .= &calculate_sdram_init($value, $sdram_config);
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next;
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}
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}
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$return_value .= " --setreg $register $value";
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}
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close(FILE);
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return $return_value;
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}
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#*****************************************************************************
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##
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## FUNCTION NAME: get_dword
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##
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##****************************************************************************
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sub get_dword
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{
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my $data;
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read(FILE, $data, 4);
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return unpack("H8", pack("V", unpack("N", $data)));
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}
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#*****************************************************************************
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##
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## FUNCTION NAME: calculate_sdram_init
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##
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##****************************************************************************
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sub calculate_sdram_init
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{
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# Refer to ETRAX 100LX Designers Reference for a description of SDRAM
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# initialization
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my $sdram_init_val = hex($_[0]);
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my $sdram_config_val = hex($_[1]);
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my $bus_width = $sdram_config_val & 0x00800000;
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my $speed;
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my $cas_latency;
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my $mrs_data;
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my $temp;
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my $return_value;
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my $value;
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$mrs_data = ($sdram_init_val & 0x00ff0000) >> 16;
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$sdram_init_val &= 0x8000ffff; # Make sure mrs data is 0
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$sdram_init_val |= 0x80000000; # Make sure sdram is enabled
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$speed = $sdram_init_val & 0x1000;
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$cas_latency = $sdram_init_val & 0x3;
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if ($speed) # 100 MHz
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{
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$cas_latency += 2;
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}
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else # 50 MHz
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{
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$cas_latency += 1;
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}
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# Calculate value of mrs_data
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# CAS latency = 2 && bus_width = 32 => 0x40
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# CAS latency = 3 && bus_width = 32 => 0x60
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# CAS latency = 2 && bus_width = 16 => 0x20
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# CAS latency = 3 && bus_width = 16 => 0x30
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if ($mrs_data == 0)
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{
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if ($bus_width == 0) # 16 bits
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{
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$mrs_data = $cas_latency == 2 ? 0x20 : 0x30;
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}
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else # 32 bits
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{
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$mrs_data = $cas_latency == 2 ? 0x40 : 0x60;
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}
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}
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$temp = $sdram_init_val | 0x0000c000; # Disable refresh
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$return_value .= &sdram_command($temp);
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$return_value .= " --pause 20000";
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$return_value .= &sdram_command($temp, $sdram_precharge);
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$return_value .= &sdram_command($temp, $sdram_nop);
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$return_value .= " --setreg +0 7";
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$return_value .= " --label label1";
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$return_value .= &sdram_command($temp, $sdram_refresh);
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$return_value .= &sdram_command($temp, $sdram_nop);
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$return_value .= " --loop +0 label1";
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$return_value .= &sdram_command($temp, $sdram_mrs, $mrs_data);
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$return_value .= &sdram_command($temp, $sdram_nop);
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$return_value .= &sdram_command($sdram_init_val);
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return $return_value;
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}
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#*****************************************************************************
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##
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## FUNCTION NAME: sdram_command
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##
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##****************************************************************************
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sub sdram_command
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{
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my($temp, $value, $mrs_data) = @_;
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$value ||= 0;
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if ($value == $sdram_mrs)
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{
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$value = sprintf("%lx", $temp | ($value << 9) | ($mrs_data << 16));
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}
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else
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{
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$value = sprintf("%lx", $temp | ($value << 9));
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}
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return " --setreg $sdram_timing_address $value";
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}
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#*****************************************************************************
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##
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## FUNCTION NAME: print_help
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##
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##****************************************************************************
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sub print_help
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{
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print "\nAXIS $my_name, ", '$Revision: 1.16 $ $Date: 2004/11/01 16:32:27 $ ', "\n";
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die <<EOT;
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Copyright (C) 2001-2002 Axis Communications AB
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DESCRIPTION:
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This program is used to boot (and flash) a linux image to a box.
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It tries to extract the required ETRAX 100 settings from the image file.
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SYNTAX:
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$my_name [options]
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OPTIONS:
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-b <bootfile> : The boot image to use.
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-d <device> : The network interface to use, default is eth0.
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-f : Save the image in the flash memory starting at
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address 0x10000.
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-F : Save the image in the flash memory starting at
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address 0.
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-h : Print this help text.
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-i <image> : The path and name of the image to use, default
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is fimage.
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-o <offset> : The offset in the flash where the flashing starts.
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-O <offset> : The offset in the image file where the flashing
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starts from.
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-p : Print the resulting etrax100boot command instead
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of executing it.
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-s <size> : How much to flash (default is the size of the
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flash minus the offset specified using -o or -f).
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-S <size> : The size of the flash.
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All sizes and offsets above can be specified as decimal numbers, or as
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hexadecimal numbers by prefixing them with 0x. It is also possible to use
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the suffixes k and M to specify kilo (1024) or mega (1048576).
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EOT
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}
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#****************** END OF FILE boot_linux ***********************************
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