mirror of
https://github.com/LibreELEC/LibreELEC.tv.git
synced 2025-07-24 11:16:51 +00:00
scripts: add script to inject device tree blobs to RPi kernel, thanks to Milhouse
Signed-off-by: Stephan Raue <stephan@openelec.tv>
This commit is contained in:
Stephan Raue
parent
5c60b12739
commit
14c4113e9e
@ -203,7 +203,13 @@ IMAGE_NAME="$DISTRONAME-$TARGET_VERSION"
|
||||
KERNEL_ARCH="arm"
|
||||
fi
|
||||
|
||||
cp -PR $BUILD/linux-*/arch/$KERNEL_ARCH/boot/$KERNEL_IMAGE $TARGET_IMG/$IMAGE_NAME.kernel
|
||||
if [ "$BOOTLOADER" = "bcm2835-bootloader" ]; then
|
||||
echo "injecting DeviceTreeBlobs to kernel..."
|
||||
perl scripts/mkknlimg $BUILD/linux-*/arch/$KERNEL_ARCH/boot/$KERNEL_IMAGE $TARGET_IMG/$IMAGE_NAME.kernel
|
||||
echo "...done"
|
||||
else
|
||||
cp -PR $BUILD/linux-*/arch/$KERNEL_ARCH/boot/$KERNEL_IMAGE $TARGET_IMG/$IMAGE_NAME.kernel
|
||||
fi
|
||||
chmod 0644 $TARGET_IMG/$IMAGE_NAME.kernel
|
||||
|
||||
# create squashfs file
|
||||
|
||||
224
scripts/mkknlimg
Executable file
224
scripts/mkknlimg
Executable file
@ -0,0 +1,224 @@
|
||||
#!/usr/bin/env perl
|
||||
|
||||
use strict;
|
||||
use integer;
|
||||
|
||||
my $trailer_magic = 'RPTL';
|
||||
|
||||
my $tmpfile1 = "/tmp/mkknlimg_$$.1";
|
||||
my $tmpfile2 = "/tmp/mkknlimg_$$.2";
|
||||
|
||||
my $dtok = 0;
|
||||
|
||||
while ($ARGV[0] =~ /^-/)
|
||||
{
|
||||
my $arg = shift(@ARGV);
|
||||
if ($arg eq '--dtok')
|
||||
{
|
||||
$dtok = 1;
|
||||
}
|
||||
else
|
||||
{
|
||||
print ("* Unknown option '$arg'\n");
|
||||
usage();
|
||||
}
|
||||
}
|
||||
|
||||
usage() if (@ARGV != 2);
|
||||
|
||||
my $kernel_file = $ARGV[0];
|
||||
my $out_file = $ARGV[1];
|
||||
|
||||
my @wanted_config_lines =
|
||||
(
|
||||
'CONFIG_BCM2708_DT'
|
||||
);
|
||||
|
||||
my @wanted_strings =
|
||||
(
|
||||
'bcm2708_fb',
|
||||
'brcm,bcm2708-pinctrl',
|
||||
'brcm,bcm2835-gpio',
|
||||
'of_find_property'
|
||||
);
|
||||
|
||||
my $res = try_extract($kernel_file, $tmpfile1);
|
||||
|
||||
$res = try_decompress('\037\213\010', 'xy', 'gunzip', 0,
|
||||
$kernel_file, $tmpfile1, $tmpfile2) if (!$res);
|
||||
$res = try_decompress('\3757zXZ\000', 'abcde', 'unxz --single-stream', -1,
|
||||
$kernel_file, $tmpfile1, $tmpfile2) if (!$res);
|
||||
$res = try_decompress('BZh', 'xy', 'bunzip2', 0,
|
||||
$kernel_file, $tmpfile1, $tmpfile2) if (!$res);
|
||||
$res = try_decompress('\135\0\0\0', 'xxx', 'unlzma', 0,
|
||||
$kernel_file, $tmpfile1, $tmpfile2) if (!$res);
|
||||
$res = try_decompress('\211\114\132', 'xy', 'lzop -d', 0,
|
||||
$kernel_file, $tmpfile1, $tmpfile2) if (!$res);
|
||||
|
||||
my $append_trailer;
|
||||
my $trailer;
|
||||
|
||||
if ($res)
|
||||
{
|
||||
print("Version: $res->{''}\n");
|
||||
|
||||
$append_trailer = $dtok;
|
||||
if (!$dtok)
|
||||
{
|
||||
if (config_bool($res, 'bcm2708_fb'))
|
||||
{
|
||||
$dtok ||= config_bool($res, 'CONFIG_BCM2708_DT');
|
||||
$dtok ||= config_bool($res, 'brcm,bcm2708-pinctrl');
|
||||
$dtok ||= config_bool($res, 'brcm,bcm2835-gpio');
|
||||
$append_trailer = 1;
|
||||
}
|
||||
else
|
||||
{
|
||||
print ("* This doesn't look like a Raspberry Pi kernel. In pass-through mode.\n");
|
||||
}
|
||||
}
|
||||
}
|
||||
else
|
||||
{
|
||||
print ("* Is this a valid kernel? In pass-through mode.\n");
|
||||
}
|
||||
|
||||
if ($append_trailer)
|
||||
{
|
||||
printf("DT: %s\n", $dtok ? "y" : "n");
|
||||
|
||||
my @atoms;
|
||||
|
||||
push @atoms, [ $trailer_magic, pack('V', 0) ];
|
||||
push @atoms, [ 'KVer', $res->{''} ];
|
||||
push @atoms, [ 'DTOK', pack('V', $dtok) ];
|
||||
|
||||
$trailer = pack_trailer(\@atoms);
|
||||
$atoms[0]->[1] = pack('V', length($trailer));
|
||||
|
||||
$trailer = pack_trailer(\@atoms);
|
||||
}
|
||||
|
||||
die "* Failed to open '$kernel_file'\n" if (!open(my $ifh, '<', $kernel_file));
|
||||
die "* Failed to create '$out_file'\n" if (!open(my $ofh, '>', $out_file));
|
||||
|
||||
my $copybuf;
|
||||
my $total_len = 0;
|
||||
while (1)
|
||||
{
|
||||
my $bytes = sysread($ifh, $copybuf, 64*1024);
|
||||
last if (!$bytes);
|
||||
syswrite($ofh, $copybuf, $bytes);
|
||||
$total_len += $bytes;
|
||||
}
|
||||
|
||||
if ($trailer)
|
||||
{
|
||||
# Pad to word-alignment
|
||||
syswrite($ofh, "\x000\x000\x000", (-$total_len & 0x3));
|
||||
syswrite($ofh, $trailer);
|
||||
}
|
||||
|
||||
close($ifh);
|
||||
close($ofh);
|
||||
|
||||
exit($trailer ? 0 : 1);
|
||||
|
||||
END {
|
||||
unlink($tmpfile1) if ($tmpfile1);
|
||||
unlink($tmpfile2) if ($tmpfile2);
|
||||
}
|
||||
|
||||
|
||||
sub usage
|
||||
{
|
||||
print ("Usage: mkknlimg [--dtok] <vmlinux|zImage|bzImage> <outfile>\n");
|
||||
exit(1);
|
||||
}
|
||||
|
||||
sub try_extract
|
||||
{
|
||||
my ($knl, $tmp) = @_;
|
||||
|
||||
my $ver = `strings "$knl" | grep -a -E "^Linux version [1-9]"`;
|
||||
|
||||
return undef if (!$ver);
|
||||
|
||||
chomp($ver);
|
||||
|
||||
my $res = { ''=>$ver };
|
||||
my $string_pattern = '^('.join('|', @wanted_strings).')$';
|
||||
|
||||
my @matches = `strings \"$knl\" | grep -E \"$string_pattern\"`;
|
||||
foreach my $match (@matches)
|
||||
{
|
||||
chomp($match);
|
||||
$res->{$match} = 1;
|
||||
}
|
||||
|
||||
my $config_pattern = '^('.join('|', @wanted_config_lines).')=(.*)$';
|
||||
my $cf1 = 'IKCFG_ST\037\213\010';
|
||||
my $cf2 = '0123456789';
|
||||
|
||||
my $pos = `tr "$cf1\n$cf2" "\n$cf2=" < "$knl" | grep -abo "^$cf2"`;
|
||||
if ($pos)
|
||||
{
|
||||
$pos =~ s/:.*[\r\n]*$//s;
|
||||
$pos += 8;
|
||||
my $err = (system("tail -c+$pos \"$knl\" | zcat > $tmp 2> /dev/null") >> 8);
|
||||
if (($err == 0) || ($err == 2))
|
||||
{
|
||||
if (open(my $fh, '<', $tmp))
|
||||
{
|
||||
while (my $line = <$fh>)
|
||||
{
|
||||
chomp($line);
|
||||
$res->{$1} = $2 if ($line =~ /$config_pattern/);
|
||||
}
|
||||
|
||||
close($fh);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
return $res;
|
||||
}
|
||||
|
||||
|
||||
sub try_decompress
|
||||
{
|
||||
my ($magic, $subst, $zcat, $idx, $knl, $tmp1, $tmp2) = @_;
|
||||
|
||||
my $pos = `tr "$magic\n$subst" "\n$subst=" < "$knl" | grep -abo "^$subst"`;
|
||||
if ($pos)
|
||||
{
|
||||
chomp($pos);
|
||||
$pos = (split(/[\r\n]+/, $pos))[$idx];
|
||||
$pos =~ s/:.*[\r\n]*$//s;
|
||||
my $cmd = "tail -c+$pos \"$knl\" | $zcat > $tmp2 2> /dev/null";
|
||||
my $err = (system($cmd) >> 8);
|
||||
return undef if (($err != 0) && ($err != 2));
|
||||
|
||||
return try_extract($tmp2, $tmp1);
|
||||
}
|
||||
|
||||
return undef;
|
||||
}
|
||||
|
||||
sub pack_trailer
|
||||
{
|
||||
my ($atoms) = @_;
|
||||
my $trailer = pack('VV', 0, 0);
|
||||
for (my $i = $#$atoms; $i>=0; $i--)
|
||||
{
|
||||
my $atom = $atoms->[$i];
|
||||
$trailer .= pack('a*x!4Va4', $atom->[1], length($atom->[1]), $atom->[0]);
|
||||
}
|
||||
return $trailer;
|
||||
}
|
||||
|
||||
sub config_bool
|
||||
{
|
||||
my ($configs, $wanted) = @_;
|
||||
return (($configs->{$wanted} eq 'y') || ($configs->{$wanted} eq '1'));
|
||||
}
|
||||
Loading…
x
Reference in New Issue
Block a user