diff options
Diffstat (limited to 'target/linux/brcm2708/patches-4.9/950-0052-scripts-Add-mkknlimg-and-knlinfo-scripts-from-tools-.patch')
| -rw-r--r-- | target/linux/brcm2708/patches-4.9/950-0052-scripts-Add-mkknlimg-and-knlinfo-scripts-from-tools-.patch | 515 |
1 files changed, 515 insertions, 0 deletions
diff --git a/target/linux/brcm2708/patches-4.9/950-0052-scripts-Add-mkknlimg-and-knlinfo-scripts-from-tools-.patch b/target/linux/brcm2708/patches-4.9/950-0052-scripts-Add-mkknlimg-and-knlinfo-scripts-from-tools-.patch new file mode 100644 index 0000000..7ae4edd --- /dev/null +++ b/target/linux/brcm2708/patches-4.9/950-0052-scripts-Add-mkknlimg-and-knlinfo-scripts-from-tools-.patch @@ -0,0 +1,515 @@ +From c1275c733d61290f7477eb7bbaea96d04206eff3 Mon Sep 17 00:00:00 2001 +From: Phil Elwell <phil@raspberrypi.org> +Date: Mon, 11 May 2015 09:00:42 +0100 +Subject: [PATCH] scripts: Add mkknlimg and knlinfo scripts from tools repo + +The Raspberry Pi firmware looks for a trailer on the kernel image to +determine whether it was compiled with Device Tree support enabled. +If the firmware finds a kernel without this trailer, or which has a +trailer indicating that it isn't DT-capable, it disables DT support +and reverts to using ATAGs. + +The mkknlimg utility adds that trailer, having first analysed the +image to look for signs of DT support and the kernel version string. + +knlinfo displays the contents of the trailer in the given kernel image. + +scripts/mkknlimg: Add support for ARCH_BCM2835 + +Add a new trailer field indicating whether this is an ARCH_BCM2835 +build, as opposed to MACH_BCM2708/9. If the loader finds this flag +is set it changes the default base dtb file name from bcm270x... +to bcm283y... + +Also update knlinfo to show the status of the field. + +scripts/mkknlimg: Improve ARCH_BCM2835 detection + +The board support code contains sufficient strings to be able to +distinguish 2708 vs. 2835 builds, so remove the check for +bcm2835-pm-wdt which could exist in either. + +Also, since the canned configuration is no longer built in (it's +a module), remove the config string checking. + +See: https://github.com/raspberrypi/linux/issues/1157 + +scripts: Multi-platform support for mkknlimg and knlinfo + +The firmware uses tags in the kernel trailer to choose which dtb file +to load. Current firmware loads bcm2835-*.dtb if the '283x' tag is true, +otherwise it loads bcm270*.dtb. This scheme breaks if an image supports +multiple platforms. + +This patch adds '270X' and '283X' tags to indicate support for RPi and +upstream platforms, respectively. '283x' (note lower case 'x') is left +for old firmware, and is only set if the image only supports upstream +builds. + +scripts/mkknlimg: Append a trailer for all input + +Now that the firmware assumes an unsigned kernel is DT-capable, it is +helpful to be able to mark a kernel as being non-DT-capable. + +Signed-off-by: Phil Elwell <phil@raspberrypi.org> + +scripts/knlinfo: Decode DDTK atom + +Show the DDTK atom as being a boolean. + +Signed-off-by: Phil Elwell <phil@raspberrypi.org> + +mkknlimg: Retain downstream-kernel detection + +With the death of ARCH_BCM2708 and ARCH_BCM2709, a new way is needed to +determine if this is a "downstream" build that wants the firmware to +load a bcm27xx .dtb. The vc_cma driver is used downstream but not +upstream, making vc_cma_init a suitable predicate symbol. +--- + scripts/knlinfo | 171 +++++++++++++++++++++++++++++++++++ + scripts/mkknlimg | 264 +++++++++++++++++++++++++++++++++++++++++++++++++++++++ + 2 files changed, 435 insertions(+) + create mode 100755 scripts/knlinfo + create mode 100755 scripts/mkknlimg + +--- /dev/null ++++ b/scripts/knlinfo +@@ -0,0 +1,171 @@ ++#!/usr/bin/env perl ++# ---------------------------------------------------------------------- ++# knlinfo by Phil Elwell for Raspberry Pi ++# ++# (c) 2014,2015 Raspberry Pi (Trading) Limited <info@raspberrypi.org> ++# ++# Licensed under the terms of the GNU General Public License. ++# ---------------------------------------------------------------------- ++ ++use strict; ++use integer; ++ ++use Fcntl ":seek"; ++ ++my $trailer_magic = 'RPTL'; ++ ++my %atom_formats = ++( ++ 'DDTK' => \&format_bool, ++ 'DTOK' => \&format_bool, ++ 'KVer' => \&format_string, ++ '270X' => \&format_bool, ++ '283X' => \&format_bool, ++ '283x' => \&format_bool, ++); ++ ++if (@ARGV != 1) ++{ ++ print ("Usage: knlinfo <kernel image>\n"); ++ exit(1); ++} ++ ++my $kernel_file = $ARGV[0]; ++ ++ ++my ($atoms, $pos) = read_trailer($kernel_file); ++ ++exit(1) if (!$atoms); ++ ++printf("Kernel trailer found at %d/0x%x:\n", $pos, $pos); ++ ++foreach my $atom (@$atoms) ++{ ++ printf(" %s: %s\n", $atom->[0], format_atom($atom)); ++} ++ ++exit(0); ++ ++sub read_trailer ++{ ++ my ($kernel_file) = @_; ++ my $fh; ++ ++ if (!open($fh, '<', $kernel_file)) ++ { ++ print ("* Failed to open '$kernel_file'\n"); ++ return undef; ++ } ++ ++ if (!seek($fh, -12, SEEK_END)) ++ { ++ print ("* seek error in '$kernel_file'\n"); ++ return undef; ++ } ++ ++ my $last_bytes; ++ sysread($fh, $last_bytes, 12); ++ ++ my ($trailer_len, $data_len, $magic) = unpack('VVa4', $last_bytes); ++ ++ if (($magic ne $trailer_magic) || ($data_len != 4)) ++ { ++ print ("* no trailer\n"); ++ return undef; ++ } ++ if (!seek($fh, -12, SEEK_END)) ++ { ++ print ("* seek error in '$kernel_file'\n"); ++ return undef; ++ } ++ ++ $trailer_len -= 12; ++ ++ while ($trailer_len > 0) ++ { ++ if ($trailer_len < 8) ++ { ++ print ("* truncated atom header in trailer\n"); ++ return undef; ++ } ++ if (!seek($fh, -8, SEEK_CUR)) ++ { ++ print ("* seek error in '$kernel_file'\n"); ++ return undef; ++ } ++ $trailer_len -= 8; ++ ++ my $atom_hdr; ++ sysread($fh, $atom_hdr, 8); ++ my ($atom_len, $atom_type) = unpack('Va4', $atom_hdr); ++ ++ if ($trailer_len < $atom_len) ++ { ++ print ("* truncated atom data in trailer\n"); ++ return undef; ++ } ++ ++ my $rounded_len = (($atom_len + 3) & ~3); ++ if (!seek($fh, -(8 + $rounded_len), SEEK_CUR)) ++ { ++ print ("* seek error in '$kernel_file'\n"); ++ return undef; ++ } ++ $trailer_len -= $rounded_len; ++ ++ my $atom_data; ++ sysread($fh, $atom_data, $atom_len); ++ ++ if (!seek($fh, -$atom_len, SEEK_CUR)) ++ { ++ print ("* seek error in '$kernel_file'\n"); ++ return undef; ++ } ++ ++ push @$atoms, [ $atom_type, $atom_data ]; ++ } ++ ++ if (($$atoms[-1][0] eq "\x00\x00\x00\x00") && ++ ($$atoms[-1][1] eq "")) ++ { ++ pop @$atoms; ++ } ++ else ++ { ++ print ("* end marker missing from trailer\n"); ++ } ++ ++ return ($atoms, tell($fh)); ++} ++ ++sub format_atom ++{ ++ my ($atom) = @_; ++ ++ my $format_func = $atom_formats{$atom->[0]} || \&format_hex; ++ return $format_func->($atom->[1]); ++} ++ ++sub format_bool ++{ ++ my ($data) = @_; ++ return unpack('V', $data) ? 'y' : 'n'; ++} ++ ++sub format_int ++{ ++ my ($data) = @_; ++ return unpack('V', $data); ++} ++ ++sub format_string ++{ ++ my ($data) = @_; ++ return '"'.$data.'"'; ++} ++ ++sub format_hex ++{ ++ my ($data) = @_; ++ return unpack('H*', $data); ++} +--- /dev/null ++++ b/scripts/mkknlimg +@@ -0,0 +1,264 @@ ++#!/usr/bin/env perl ++# ---------------------------------------------------------------------- ++# mkknlimg by Phil Elwell for Raspberry Pi ++# based on extract-ikconfig by Dick Streefland ++# ++# (c) 2009,2010 Dick Streefland <dick@streefland.net> ++# (c) 2014,2015 Raspberry Pi (Trading) Limited <info@raspberrypi.org> ++# ++# Licensed under the terms of the GNU General Public License. ++# ---------------------------------------------------------------------- ++ ++use strict; ++use warnings; ++use integer; ++ ++use constant FLAG_PI => 0x01; ++use constant FLAG_DTOK => 0x02; ++use constant FLAG_DDTK => 0x04; ++use constant FLAG_270X => 0x08; ++use constant FLAG_283X => 0x10; ++ ++my $trailer_magic = 'RPTL'; ++ ++my $tmpfile1 = "/tmp/mkknlimg_$$.1"; ++my $tmpfile2 = "/tmp/mkknlimg_$$.2"; ++ ++my $dtok = 0; ++my $ddtk = 0; ++my $is_270x = 0; ++my $is_283x = 0; ++ ++while (@ARGV && ($ARGV[0] =~ /^-/)) ++{ ++ my $arg = shift(@ARGV); ++ if ($arg eq '--dtok') ++ { ++ $dtok = 1; ++ } ++ elsif ($arg eq '--ddtk') ++ { ++ $ddtk = 1; ++ } ++ elsif ($arg eq '--270x') ++ { ++ $is_270x = 1; ++ } ++ elsif ($arg eq '--283x') ++ { ++ $is_283x = 1; ++ } ++ else ++ { ++ print ("* Unknown option '$arg'\n"); ++ usage(); ++ } ++} ++ ++usage() if (@ARGV != 2); ++ ++my $kernel_file = $ARGV[0]; ++my $out_file = $ARGV[1]; ++ ++if (! -r $kernel_file) ++{ ++ print ("* File '$kernel_file' not found\n"); ++ usage(); ++} ++ ++my $wanted_strings = ++{ ++ 'bcm2708_fb' => FLAG_PI, ++ 'brcm,bcm2835-mmc' => FLAG_PI, ++ 'brcm,bcm2835-sdhost' => FLAG_PI, ++ 'brcm,bcm2708-pinctrl' => FLAG_PI | FLAG_DTOK, ++ 'brcm,bcm2835-gpio' => FLAG_PI | FLAG_DTOK, ++ 'brcm,bcm2708' => FLAG_PI | FLAG_DTOK | FLAG_270X, ++ 'brcm,bcm2709' => FLAG_PI | FLAG_DTOK | FLAG_270X, ++ 'brcm,bcm2835' => FLAG_PI | FLAG_DTOK | FLAG_283X, ++ 'brcm,bcm2836' => FLAG_PI | FLAG_DTOK | FLAG_283X, ++ 'of_cfs_init' => FLAG_DTOK | FLAG_DDTK, ++ 'vc_cma_init' => FLAG_PI | FLAG_270X, ++}; ++ ++my $res = try_extract($kernel_file, $tmpfile1); ++$res ||= try_decompress('\037\213\010', 'xy', 'gunzip', 0, ++ $kernel_file, $tmpfile1, $tmpfile2); ++$res ||= try_decompress('\3757zXZ\000', 'abcde', 'unxz --single-stream', -1, ++ $kernel_file, $tmpfile1, $tmpfile2); ++$res ||= try_decompress('BZh', 'xy', 'bunzip2', 0, ++ $kernel_file, $tmpfile1, $tmpfile2); ++$res ||= try_decompress('\135\0\0\0', 'xxx', 'unlzma', 0, ++ $kernel_file, $tmpfile1, $tmpfile2); ++$res ||= try_decompress('\211\114\132', 'xy', 'lzop -d', 0, ++ $kernel_file, $tmpfile1, $tmpfile2); ++$res ||= try_decompress('\002\041\114\030', 'xy', 'lz4 -d', 1, ++ $kernel_file, $tmpfile1, $tmpfile2); ++ ++my $append_trailer; ++my $trailer; ++my $kver = '?'; ++ ++$append_trailer = 1; ++ ++if ($res) ++{ ++ $kver = $res->{'kver'} || '?'; ++ my $flags = $res->{'flags'}; ++ print("Version: $kver\n"); ++ ++ if ($flags & FLAG_PI) ++ { ++ $dtok ||= ($flags & FLAG_DTOK) != 0; ++ $is_270x ||= ($flags & FLAG_270X) != 0; ++ $is_283x ||= ($flags & FLAG_283X) != 0; ++ $ddtk ||= ($flags & FLAG_DDTK) != 0; ++ } ++ else ++ { ++ print ("* This doesn't look like a Raspberry Pi kernel.\n"); ++ } ++} ++elsif (!$dtok) ++{ ++ print ("* Is this a valid kernel?\n"); ++} ++ ++if ($append_trailer) ++{ ++ printf("DT: %s\n", $dtok ? "y" : "n"); ++ printf("DDT: %s\n", $ddtk ? "y" : "n"); ++ printf("270x: %s\n", $is_270x ? "y" : "n"); ++ printf("283x: %s\n", $is_283x ? "y" : "n"); ++ ++ my @atoms; ++ ++ push @atoms, [ $trailer_magic, pack('V', 0) ]; ++ push @atoms, [ 'KVer', $kver ]; ++ push @atoms, [ 'DTOK', pack('V', $dtok) ]; ++ push @atoms, [ 'DDTK', pack('V', $ddtk) ]; ++ push @atoms, [ '270X', pack('V', $is_270x) ]; ++ push @atoms, [ '283X', pack('V', $is_283x) ]; ++ push @atoms, [ '283x', pack('V', $is_283x && !$is_270x) ]; ++ ++ $trailer = pack_trailer(\@atoms); ++ $atoms[0]->[1] = pack('V', length($trailer)); ++ ++ $trailer = pack_trailer(\@atoms); ++} ++ ++my $ofh; ++my $total_len = 0; ++ ++if ($out_file eq $kernel_file) ++{ ++ die "* Failed to open '$out_file' for append\n" ++ if (!open($ofh, '>>', $out_file)); ++ $total_len = tell($ofh); ++} ++else ++{ ++ die "* Failed to open '$kernel_file'\n" ++ if (!open(my $ifh, '<', $kernel_file)); ++ die "* Failed to create '$out_file'\n" ++ if (!open($ofh, '>', $out_file)); ++ ++ my $copybuf; ++ while (1) ++ { ++ my $bytes = sysread($ifh, $copybuf, 64*1024); ++ last if (!$bytes); ++ syswrite($ofh, $copybuf, $bytes); ++ $total_len += $bytes; ++ } ++ close($ifh); ++} ++ ++if ($trailer) ++{ ++ # Pad to word-alignment ++ syswrite($ofh, "\x000\x000\x000", (-$total_len & 0x3)); ++ syswrite($ofh, $trailer); ++} ++ ++close($ofh); ++ ++exit($trailer ? 0 : 1); ++ ++END { ++ unlink($tmpfile1) if ($tmpfile1); ++ unlink($tmpfile2) if ($tmpfile2); ++} ++ ++ ++sub usage ++{ ++ print ("Usage: mkknlimg [--dtok] [--270x] [--283x] <vmlinux|zImage|bzImage> <outfile>\n"); ++ exit(1); ++} ++ ++sub try_extract ++{ ++ my ($knl, $tmp) = @_; ++ ++ my $ver = `strings "$knl" | grep -a -E "^Linux version [1-9]"`; ++ ++ return undef if (!$ver); ++ ++ chomp($ver); ++ ++ my $res = { 'kver'=>$ver }; ++ $res->{'flags'} = strings_to_flags($knl, $wanted_strings); ++ ++ 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]; ++ return undef if (!defined($pos)); ++ $pos =~ s/:.*[\r\n]*$//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, $tmp1); ++ } ++ ++ return undef; ++} ++ ++sub strings_to_flags ++{ ++ my ($knl, $strings) = @_; ++ my $string_pattern = '^('.join('|', keys(%$strings)).')$'; ++ my $flags = 0; ++ ++ my @matches = `strings \"$knl\" | grep -E \"$string_pattern\"`; ++ foreach my $match (@matches) ++ { ++ chomp($match); ++ $flags |= $strings->{$match}; ++ } ++ ++ return $flags; ++} ++ ++sub pack_trailer ++{ ++ my ($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; ++} |