Re: [coreboot] Fix some PCI issues on M57SLI v2

[Ward Vandewege]

Hi Harald,

Great work! I'll test it tomorrow on a v1 board.

On Tue, Mar 31, 2009 at 05:44:50PM +0200, Harald Gutmann wrote:
> +             /* TODO: Check why udev renames eth0 to eth1 at boot time */
> +     PCI_INT(0,sbdn+8,0, 22); /* GBit Ether */

If you check, you'll find your mac address to be different under coreboot.
That's because for mcp55-based nics, the mac address is stored in the bios
rom image.

I have a script that I use to binary patch coreboot rom images with a
different mac address. It's attached.

Thanks,
Ward.

-- 
Ward Vandewege <w...@fsf.org>
Free Software Foundation - Senior Systems Administrator

#!/usr/bin/perl
#
# Binary patch the mac address in a coreboot rom image for an mcp55-based board.
#
# Only tested on Gigabyte m57sli. Will only modify one mac address. Use at your own risk!
#
# GPL v2 or later.
#
# 2009-03-31
# Ward Vandewege <w...@gnu.org>

my $mac = $ARGV[0];
my $file = $ARGV[1];

if (($mac eq '') or ($file eq '')) {
	print "\nSyntax: $0 <mac address> <rom image>\n";
	exit 1;
}

if (! -f $file) {
	print "\nSyntax: $0 <mac address> <rom image>\n";
	print "\nERROR: Could not file file '$file'.\n\n";
	exit 1;
}

if (!($mac =~ /^[0-9A-Fa-f]{2}:[0-9A-Fa-f]{2}:[0-9A-Fa-f]{2}:[0-9A-Fa-f]{2}:[0-9A-Fa-f]{2}:[0-9A-Fa-f]{2}$/)) {
	print "\nSyntax: $0 <mac address> <rom image>\n";
	print "\nERROR: The mac address you specified ($mac) is not a valid mac address.\n\n";
	exit 1;
}

my @mac = split(/:/,$mac);

my $newmac = '';

for (my $c = 5; $c >= 0; $c--) {
	$newmac .= chr(hex($mac[$c]));
}

open(ROMIMAGE,"+<",$file) or die "Can't open file $file for writing\n";
seek(ROMIMAGE,-48,2);

print ROMIMAGE $newmac;
close(ROMIMAGE);

print "Mac address succesfully updated to $mac in $file\n";
exit 0;



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