wok annotate linux-libre/stuff/bootloader.sh @ rev 13153

zerobin: add purge.sh (for crontab)
author Pascal Bellard <pascal.bellard@slitaz.org>
date Mon Jul 16 10:19:42 2012 +0200 (2012-07-16)
parents abe27fd0192d
children
rev   line source
gokhlayeh@9257 1 #!/bin/sh
gokhlayeh@9257 2 #
gokhlayeh@9257 3 # This script creates a floppy image set from a linux bzImage and can merge
gokhlayeh@9257 4 # a cmdline and/or one or more initramfs.
gokhlayeh@9257 5 # The total size can not exceed 15M because INT 15H function 87H limitations.
gokhlayeh@9257 6 #
gokhlayeh@9257 7 # (C) 2009 Pascal Bellard - GNU General Public License v3.
gokhlayeh@9257 8
gokhlayeh@9257 9 usage()
gokhlayeh@9257 10 {
gokhlayeh@9257 11 cat <<EOT
gokhlayeh@9257 12 Usage: $0 bzImage [--prefix image_prefix] [--cmdline 'args']
gokhlayeh@9257 13 [--rdev device] [--video mode] [--flags rootflags] [--tracks cnt]
gokhlayeh@9257 14 [--format 1440|1680|1920|2880 ] [--initrd initrdfile]...
gokhlayeh@9257 15
gokhlayeh@9257 16 Default values: --format 1440 --tracks 80 --prefix floppy.
gokhlayeh@9257 17
gokhlayeh@11396 18 Or: cat fd0*.img | $0 --extract
gokhlayeh@11396 19
gokhlayeh@11396 20 Create the kernel, cmdline and rootfs files from a floppy set
gokhlayeh@11396 21
gokhlayeh@9257 22 Example:
gokhlayeh@11396 23 $0 /boot/vmlinuz-2.6.30.6 --rdev /dev/ram0 --video -3 \
gokhlayeh@11396 24 --cmdline 'rw lang=fr_FR kmap=fr-latin1 laptop autologin' \
gokhlayeh@11396 25 --initrd /boot/rootfs.gz --initrd ./myconfig.gz
gokhlayeh@9257 26 EOT
gokhlayeh@9257 27 exit 1
gokhlayeh@9257 28 }
gokhlayeh@9257 29
gokhlayeh@11396 30 ddq()
gokhlayeh@11396 31 {
gokhlayeh@11396 32 dd $@ 2> /dev/null
gokhlayeh@11396 33 }
gokhlayeh@9257 34
gokhlayeh@11396 35 dbg()
gokhlayeh@9257 36 {
gokhlayeh@11396 37 [ -n "$DEBUG" ] && echo "$@" 1>&2
gokhlayeh@9257 38 }
gokhlayeh@9257 39
gokhlayeh@9257 40 # write a 32 bits data
gokhlayeh@11396 41 # usage: put offset data32 file [bytes]
gokhlayeh@11396 42 put()
gokhlayeh@9257 43 {
gokhlayeh@11396 44 n=$2; for i in $(seq 1 ${4:-4}); do
gokhlayeh@9257 45 printf '\\\\x%02X' $(($n & 255))
gokhlayeh@11396 46 n=$(($n >> 8))
gokhlayeh@11396 47 done | xargs echo -en | ddq bs=1 conv=notrunc of=$3 seek=$1
gokhlayeh@11396 48 [ -n "$DEBUG" ] && printf "put$4(%04X) = %X\n" $1 $2 1>&2
gokhlayeh@9257 49 }
gokhlayeh@9257 50
gokhlayeh@9257 51 # read a 32 bits data
gokhlayeh@11396 52 # usage: get offset file [bytes]
gokhlayeh@11396 53 get()
gokhlayeh@9257 54 {
gokhlayeh@11396 55 ddq if=$2 bs=1 skip=$(($1)) count=${3:-4} | hexdump -e '"" 1/4 "%d"'
gokhlayeh@9257 56 }
gokhlayeh@9257 57
gokhlayeh@11396 58 SetupSzOfs=0x1F1
gokhlayeh@11396 59 SyssizeOfs=0x1F4
gokhlayeh@11396 60 RamfsLenOfs=0x21C
gokhlayeh@11396 61 ArgPtrOfs=0x228
gokhlayeh@11396 62
gokhlayeh@9257 63 floppyset()
gokhlayeh@9257 64 {
gokhlayeh@9257 65 # bzImage offsets
gokhlayeh@11396 66 CylinderCount=0x1F0
gokhlayeh@11396 67 FlagsOfs=0x1F2
gokhlayeh@11396 68 VideoModeOfs=0x1FA
gokhlayeh@11396 69 RootDevOfs=0x1FC
gokhlayeh@9257 70 CodeAdrOfs=0x214
gokhlayeh@9257 71 RamfsAdrOfs=0x218
gokhlayeh@9257 72
gokhlayeh@9257 73 # boot+setup address
gokhlayeh@9257 74 SetupBase=0x90000
gokhlayeh@9257 75
gokhlayeh@9257 76 stacktop=0x9E00
gokhlayeh@9257 77
gokhlayeh@9257 78 bs=/tmp/bs$$
gokhlayeh@9257 79
gokhlayeh@9257 80 # Get and patch boot sector
gokhlayeh@9257 81 # See http://hg.slitaz.org/wok/raw-file/711d076b277c/linux/stuff/linux-header-2.6.34.u
gokhlayeh@11396 82 ddq if=$KERNEL bs=512 count=1 of=$bs
gokhlayeh@11396 83 uudecode <<EOT | ddq of=$bs conv=notrunc
gokhlayeh@9257 84 begin-base64 644 -
gokhlayeh@9257 85 /L+6nWgAkAcGF4n8McC5HQDzq1sfD6mg8X1ABlfFd3ixBvOlZWaPR3gGH8ZF
gokhlayeh@9257 86 +D/6l1hB6DQBvgACA3QO6HYBWwseKAJ0LFNH6AoBXuhmAbAgzRCwCM0QTuhl
gokhlayeh@9257 87 ATwIdAOIBK05NigCdPDoPgE8CnXgiHz+ieb/TBD/TBi/9AGBTRz/gMdFMACc
gokhlayeh@9257 88 sBCxBUi0k4lEHLABiUQUmGaY0+BIZgMFZtPoaAAQB7+AACn4nHMCAccx21BW
gokhlayeh@9257 89 6J4AXrkAgLSH/kQczRVYnXfcoRoCvxwCsQk4RBxyuJPNE+oAACCQsEYoyL7b
gokhlayeh@9257 90 AejSAF3rI4D5E3IEOMF3a4D+AnIEOOZ3bGCB/QAGdCoGUlFTlrQCULEGtQTB
gokhlayeh@9257 91 xQSwDyHoBJAnFEAn6IwA/s117LAgzRDitOiWAJjNE2FSUCjIdwKwAZg5+HIC
gokhlayeh@9257 92 ifhQtALNE5VeWFpyoJVBjuGAxwJPdFFOdfSM4ZU4wXVFiMj+xrEBOOZ1O4j0
gokhlayeh@9257 93 /sW2AID9UHIwOi7wAXIqtQBgvt4B/kQMU+gxAFvoOAB1FlKYzRO4AQLNE1rQ
gokhlayeh@9257 94 1Dpk/nXqRgjkdeVh64sWB7AxLAO0DrsHAM0QPA1088OwDejv/6wIwHX4w79s
gokhlayeh@9257 95 BLFbZQINuA0BZToNdArNFnT0mM0Wju9Hw1g6AEluc2VydCBkaXNrIDEuBw0A
gokhlayeh@9257 96 AA==
gokhlayeh@9257 97 ====
gokhlayeh@9257 98 EOT
gokhlayeh@9257 99
gokhlayeh@9257 100 # Get setup
gokhlayeh@11396 101 setupsz=$(get $SetupSzOfs $bs 1)
gokhlayeh@11396 102 ddq if=$KERNEL bs=512 skip=1 count=$setupsz >> $bs
gokhlayeh@9257 103
gokhlayeh@9257 104 if [ -n "$TRACKS" ]; then
gokhlayeh@11396 105 dbg -n "--tracks "
gokhlayeh@11396 106 put $CylinderCount $TRACKS $bs 1
gokhlayeh@9257 107 fi
gokhlayeh@9257 108 if [ -n "$FLAGS" ]; then
gokhlayeh@11396 109 dbg -n "--flags "
gokhlayeh@11396 110 put $FlagsOfs $FLAGS $bs 2
gokhlayeh@9257 111 fi
gokhlayeh@9257 112 if [ -n "$VIDEO" ]; then
gokhlayeh@11396 113 dbg -n "--video "
gokhlayeh@11396 114 put $VideoModeOfs $VIDEO $bs 2
gokhlayeh@9257 115 fi
gokhlayeh@9257 116 if [ -n "$RDEV" ]; then
gokhlayeh@11396 117 dbg -n "--rdev "
gokhlayeh@9257 118 n=$(stat -c '0x%02t%02T' $RDEV 2> /dev/null)
gokhlayeh@9257 119 [ -n "$n" ] || n=$RDEV
gokhlayeh@11396 120 put $RootDevOfs $n $bs 2
gokhlayeh@9257 121 fi
gokhlayeh@9257 122
gokhlayeh@9257 123 # Store cmdline after setup
gokhlayeh@9257 124 if [ -n "$CMDLINE" ]; then
gokhlayeh@11396 125 dbg -n "--cmdline '$CMDLINE' "
gokhlayeh@11396 126 echo -n "$CMDLINE" | ddq bs=512 count=1 conv=sync >> $bs
gokhlayeh@11396 127 put $ArgPtrOfs $(( $SetupBase + $stacktop )) $bs
gokhlayeh@9257 128 fi
gokhlayeh@9257 129
gokhlayeh@9257 130 # Compute initramfs size
gokhlayeh@9257 131 initrdlen=0
gokhlayeh@9257 132 padding=0
gokhlayeh@9257 133 for i in $( echo $INITRD | sed 's/,/ /' ); do
gokhlayeh@9257 134 [ -s "$i" ] || continue
gokhlayeh@11396 135 dbg "--initrd $i "
gokhlayeh@9257 136 initrdlen=$(( $initrdlen + $padding ))
gokhlayeh@9257 137 padding=$(stat -c %s $i)
gokhlayeh@9257 138 initrdlen=$(( $initrdlen + $padding ))
gokhlayeh@9257 139 padding=$(( 4096 - ($padding & 4095) ))
gokhlayeh@9257 140 [ $padding -eq 4096 ] && padding=0
gokhlayeh@9257 141 done
gokhlayeh@11396 142 Ksize=$(( $(get $SyssizeOfs $bs)*16 ))
gokhlayeh@9257 143 Kpad=$(( (($Ksize+4095)/4096)*4096 - Ksize ))
gokhlayeh@9257 144 if [ $initrdlen -ne 0 ]; then
gokhlayeh@11396 145 dbg "initrdlen = $initrdlen "
gokhlayeh@11396 146 Kbase=$(get $CodeAdrOfs $bs)
gokhlayeh@11396 147 put $RamfsAdrOfs \
gokhlayeh@9257 148 $(( (0x1000000 - $initrdlen) & 0xFFFF0000 )) $bs
gokhlayeh@11396 149 put $RamfsLenOfs $(( ($initrdlen + 3) & -4 )) $bs
gokhlayeh@9257 150 fi
gokhlayeh@9257 151
gokhlayeh@9257 152 # Output boot sector + setup + cmdline
gokhlayeh@11396 153 ddq if=$bs
gokhlayeh@9257 154
gokhlayeh@9257 155 # Output kernel code
gokhlayeh@11396 156 ddq if=$KERNEL bs=512 skip=$(( $setupsz + 1 ))
gokhlayeh@9257 157
gokhlayeh@9257 158 # Pad to next sector
gokhlayeh@9257 159 Kpad=$(( 512 - ($(stat -c %s $KERNEL) & 511) ))
gokhlayeh@11396 160 [ $Kpad -eq 512 ] || ddq if=/dev/zero bs=1 count=$Kpad
gokhlayeh@9257 161
gokhlayeh@9257 162 # Output initramfs
gokhlayeh@9257 163 padding=0
gokhlayeh@9257 164 for i in $( echo $INITRD | sed 's/,/ /' ); do
gokhlayeh@9257 165 [ -s "$i" ] || continue
gokhlayeh@11396 166 [ $padding -ne 0 ] && ddq if=/dev/zero bs=1 count=$padding
gokhlayeh@11396 167 ddq if=$i
gokhlayeh@9257 168 padding=$(( 4 - ($(stat -c %s $i) & 3) ))
gokhlayeh@9257 169 [ $padding -eq 4 ] && padding=0
gokhlayeh@9257 170 done
gokhlayeh@9257 171
gokhlayeh@9257 172 # Cleanup
gokhlayeh@9257 173 rm -f $bs
gokhlayeh@9257 174 }
gokhlayeh@9257 175
gokhlayeh@11396 176 KERNEL=""
gokhlayeh@11396 177 INITRD=""
gokhlayeh@11396 178 CMDLINE=""
gokhlayeh@11396 179 PREFIX="floppy."
gokhlayeh@11396 180 FORMAT="1440"
gokhlayeh@11396 181 RDEV=""
gokhlayeh@11396 182 VIDEO=""
gokhlayeh@11396 183 FLAGS=""
gokhlayeh@11396 184 TRACKS=""
gokhlayeh@11396 185 DEBUG=""
gokhlayeh@11396 186 while [ -n "$1" ]; do
gokhlayeh@11396 187 case "${1/--/-}" in
gokhlayeh@11396 188 -c*) CMDLINE="$2"; shift;;
gokhlayeh@11396 189 -i*) INITRD="$INITRD $2"; shift;;
gokhlayeh@11396 190 -p*) PREFIX="$2"; shift;;
gokhlayeh@11396 191 -fl*) FLAGS="$2"; shift;; # 1 read-only, 0 read-write
gokhlayeh@11396 192 -f*) FORMAT="$2"; shift;;
gokhlayeh@11396 193 -r*) RDEV="$2"; shift;; # /dev/???
gokhlayeh@11396 194 -v*) VIDEO="$2"; shift;; # -3 .. n
gokhlayeh@11396 195 -t*) TRACKS="$2"; shift;; # likely 81 .. 84
gokhlayeh@11396 196 -d*) DEBUG="1";;
gokhlayeh@11396 197 -e*) ddq bs=512 count=2 > kernel
gokhlayeh@11396 198 setupsz=$(get $SetupSzOfs kernel 1)
gokhlayeh@11396 199 ddq bs=512 count=$(($setupsz - 1)) >> kernel
gokhlayeh@11396 200 [ $(get $ArgPtrOfs kernel) -ne 0 ] &&
gokhlayeh@11396 201 ddq bs=512 count=1 | strings > cmdline
gokhlayeh@11396 202 syssz=$(get $SyssizeOfs kernel)
gokhlayeh@11396 203 ddq bs=512 count=$(( ($syssz + 31) / 32 )) >> kernel
gokhlayeh@11396 204 ddq bs=16 seek=$(($syssz + 32 + $setupsz*32)) count=0 of=kernel
gokhlayeh@11396 205 ramsz=$(get $RamfsLenOfs kernel)
gokhlayeh@11396 206 ddq bs=512 count=$((($ramsz + 511) / 512)) of=rootfs
gokhlayeh@11396 207 ddq bs=1 seek=$ramsz count=0 of=rootfs
gokhlayeh@11396 208 exit ;;
gokhlayeh@11396 209 *) KERNEL="$1";;
gokhlayeh@11396 210 esac
gokhlayeh@11396 211 shift
gokhlayeh@11396 212 done
gokhlayeh@11396 213 [ -n "$KERNEL" -a -f "$KERNEL" ] || usage
gokhlayeh@11396 214 [ -n "$TRACKS" ] && [ $(( $FORMAT % $TRACKS )) -ne 0 ] &&
gokhlayeh@11396 215 echo "Invalid track count for format $FORMAT." && usage
gokhlayeh@11396 216
gokhlayeh@9257 217 if [ "$FORMAT" == "0" ]; then # unsplitted
gokhlayeh@9257 218 floppyset > $PREFIX
gokhlayeh@9257 219 exit
gokhlayeh@9257 220 fi
gokhlayeh@9257 221 floppyset | split -b ${FORMAT}k /dev/stdin floppy$$
gokhlayeh@9257 222 i=1
gokhlayeh@9257 223 ls floppy$$* | while read file ; do
gokhlayeh@9257 224 output=$PREFIX$(printf "%03d" $i)
gokhlayeh@11396 225 cat $file /dev/zero | ddq bs=1k count=$FORMAT conv=sync of=$output
gokhlayeh@9257 226 echo $output
gokhlayeh@9257 227 rm -f $file
gokhlayeh@9257 228 i=$(( $i + 1 ))
gokhlayeh@9257 229 done