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Add data if SPD CRC checksum is invalid to rinv

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git-svn-id: https://svn.code.sf.net/p/xcat/code/xcat-core/trunk@10412 8638fb3e-16cb-4fca-ae20-7b5d299a9bcd
This commit is contained in:
jbjohnso 2011-08-31 13:20:43 +00:00
parent 7c89d073b0
commit 18de725691
1 changed files with 37 additions and 1 deletions
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38
perl-xCAT/xCAT/SPD.pm
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@ -6,6 +6,26 @@ require Exporter;
our @ISA=qw/Exporter/;
our @EXPORT_OK=qw/decode_spd/;
sub do_crc16 {
my @data = @_;
my $crc = 0;
while (@data) {
my $byte = shift @data;
$crc = $crc ^ $byte<<8;
my $loopcount=8;
while ($loopcount--) {
if ($crc & 0x8000) {
$crc = $crc <<1 ^ 0x1021;
} else {
$crc = $crc << 1;
}
}
}
return $crc & 0xffff;;;;
}
sub decode_manufacturer {
my $jedec_ids = [
{
@ -720,7 +740,23 @@ sub decode_spd {
unless ($rethash->{product}->{model}) {
$rethash->{product}->{model}=pack("C*",@spd[128..145]);
}
}
if ($spd[0] & 0b10000000) { #crc is to exclude 117-125, crc 0 to 116
unless (do_crc16(@spd[0..116]) == ($spd[126]+($spd[127]<<8))) {
push @{$rethash->{product}->{extra}},"SPD CRC Invalid!";
}
} else { #crc for 0 to 125
unless (do_crc16(@spd[0..125]) == ($spd[126]+($spd[127]<<8))) {
push @{$rethash->{product}->{extra}},"CRC Invalid!";
}
}
my $rawspd="SPD Dump: ";
foreach (@spd) {
$rawspd .= sprintf("%02X ",$_);
}
push @{$rethash->{product}->{extra}},$rawspd;
} else {
$rethash->{product}->{model}="Unrecognized SPD";
}
return $rethash;
}