slitaz-forge annotate mirror/floppies/builder/bootloader @ rev 265

add mirror/floppies
author Pascal Bellard <pascal.bellard@slitaz.org>
date Thu Apr 12 13:38:03 2012 +0200 (2012-04-12)
parents
children e6e4be1b2591
rev   line source
pascal@265 1 #!/bin/sh
pascal@265 2 #
pascal@265 3 # This script creates a floppy image set from a linux bzImage and can merge
pascal@265 4 # a cmdline and/or one or more initramfs.
pascal@265 5 # The total size can not exceed 15M because INT 15H function 87H limitations.
pascal@265 6 #
pascal@265 7 # (C) 2009 Pascal Bellard - GNU General Public License v3.
pascal@265 8
pascal@265 9 usage()
pascal@265 10 {
pascal@265 11 cat <<EOT
pascal@265 12 Usage: $0 bzImage [--prefix image_prefix] [--cmdline 'args']
pascal@265 13 [--rdev device] [--video mode] [--flags rootflags] [--tracks cnt]
pascal@265 14 [--format 1440|1680|1920|2880 ] [--initrd initrdfile]...
pascal@265 15
pascal@265 16 Default values: --format 1440 --tracks 80 --prefix floppy.
pascal@265 17
pascal@265 18 Example:
pascal@265 19 $0 /boot/vmlinuz-2.6.30.6 --rdev /dev/ram0 --video -3 --cmdline 'rw lang=fr_FR kmap=fr-latin1 laptop autologin' --initrd /boot/rootfs.gz --initrd ./myconfig.gz
pascal@265 20 EOT
pascal@265 21 exit 1
pascal@265 22 }
pascal@265 23
pascal@265 24 KERNEL=""
pascal@265 25 INITRD=""
pascal@265 26 CMDLINE=""
pascal@265 27 PREFIX="floppy."
pascal@265 28 FORMAT="1440"
pascal@265 29 RDEV=""
pascal@265 30 VIDEO=""
pascal@265 31 FLAGS=""
pascal@265 32 TRACKS=""
pascal@265 33 DEBUG=""
pascal@265 34 while [ -n "$1" ]; do
pascal@265 35 case "$1" in
pascal@265 36 --c*|-c*) CMDLINE="$2"; shift;;
pascal@265 37 --i*|-i*) INITRD="$INITRD $2"; shift;;
pascal@265 38 --p*|-p*) PREFIX="$2"; shift;;
pascal@265 39 --fo*|-f*) FORMAT="$2"; shift;;
pascal@265 40 --fl*) FLAGS="$2"; shift;; # 1 read-only, 0 read-write
pascal@265 41 --r*|-r*) RDEV="$2"; shift;; # /dev/???
pascal@265 42 --v*|-v*) VIDEO="$2"; shift;; # -3 .. n
pascal@265 43 --t*|-t*) TRACKS="$2"; shift;; # likely 81 .. 84
pascal@265 44 --debug) DEBUG="1";;
pascal@265 45 *) KERNEL="$1";;
pascal@265 46 esac
pascal@265 47 shift
pascal@265 48 done
pascal@265 49 [ -n "$KERNEL" -a -f "$KERNEL" ] || usage
pascal@265 50 if [ -n "$TRACKS" ]; then
pascal@265 51 if [ $(( $FORMAT % $TRACKS )) -ne 0 ]; then
pascal@265 52 echo "Invalid track count for format $FORMAT."
pascal@265 53 usage
pascal@265 54 fi
pascal@265 55 fi
pascal@265 56
pascal@265 57 # write a 16 bits data
pascal@265 58 # usage: store16 offset data16 file
pascal@265 59 store16()
pascal@265 60 {
pascal@265 61 echo $(( $2 + 0x10000 )) | \
pascal@265 62 awk '{ printf "\\\\x%02X\\\\x%02X",$1%256,($1/256)%256 }' | \
pascal@265 63 xargs echo -en | \
pascal@265 64 dd bs=2 conv=notrunc of=$3 seek=$(( $1 / 2 )) 2> /dev/null
pascal@265 65 [ -n "$DEBUG" ] && printf "store16(%04X) = %04X\n" $1 $2 1>&2
pascal@265 66 }
pascal@265 67
pascal@265 68 # write a 32 bits data
pascal@265 69 # usage: storelong offset data32 file
pascal@265 70 storelong()
pascal@265 71 {
pascal@265 72 echo $2 | awk '{ printf "\\\\x%02X\\\\x%02X\\\\x%02X\\\\x%02X",
pascal@265 73 $1%256,($1/256)%256,($1/256/256)%256,($1/256/256/256)%256 }' | \
pascal@265 74 xargs echo -en | \
pascal@265 75 dd bs=4 conv=notrunc of=$3 seek=$(( $1 / 4 )) 2> /dev/null
pascal@265 76 [ -n "$DEBUG" ] && printf "storelong(%04X) = %08X\n" $1 $2 1>&2
pascal@265 77 }
pascal@265 78
pascal@265 79 # read a 32 bits data
pascal@265 80 # usage: getlong offset file
pascal@265 81 getlong()
pascal@265 82 {
pascal@265 83 dd if=$2 bs=1 skip=$(( $1 )) count=4 2> /dev/null | \
pascal@265 84 hexdump -e '"" 1/4 "%d" "\n"'
pascal@265 85 }
pascal@265 86
pascal@265 87 floppyset()
pascal@265 88 {
pascal@265 89 # bzImage offsets
pascal@265 90 CylinderCount=496
pascal@265 91 SetupSzOfs=497
pascal@265 92 FlagsOfs=498
pascal@265 93 SyssizeOfs=500
pascal@265 94 VideoModeOfs=506
pascal@265 95 RootDevOfs=508
pascal@265 96 CodeAdrOfs=0x214
pascal@265 97 RamfsAdrOfs=0x218
pascal@265 98 RamfsLenOfs=0x21C
pascal@265 99 ArgPtrOfs=0x228
pascal@265 100
pascal@265 101 # boot+setup address
pascal@265 102 SetupBase=0x90000
pascal@265 103
pascal@265 104 stacktop=0x9E00
pascal@265 105
pascal@265 106 bs=/tmp/bs$$
pascal@265 107
pascal@265 108 # Get and patch boot sector
pascal@265 109 # See http://hg.slitaz.org/wok/raw-file/711d076b277c/linux/stuff/linux-header-2.6.34.u
pascal@265 110 dd if=$KERNEL bs=512 count=1 of=$bs 2> /dev/null
pascal@265 111 uudecode <<EOT | dd of=$bs conv=notrunc 2> /dev/null
pascal@265 112 begin-base64 644 -
pascal@265 113 /L+6nWgAkAcGF4n8McC5HQDzq1sfD6mg8X1ABlfFd3ixBvOlZWaPR3gGH8ZF
pascal@265 114 +D/6l1hB6DQBvgACA3QO6HYBWwseKAJ0LFNH6AoBXuhmAbAgzRCwCM0QTuhl
pascal@265 115 ATwIdAOIBK05NigCdPDoPgE8CnXgiHz+ieb/TBD/TBi/9AGBTRz/gMdFMACc
pascal@265 116 sBCxBUi0k4lEHLABiUQUmGaY0+BIZgMFZtPoaAAQB7+AACn4nHMCAccx21BW
pascal@265 117 6J4AXrkAgLSH/kQczRVYnXfcoRoCvxwCsQk4RBxyuJPNE+oAACCQsEYoyL7b
pascal@265 118 AejSAF3rI4D5E3IEOMF3a4D+AnIEOOZ3bGCB/QAGdCoGUlFTlrQCULEGtQTB
pascal@265 119 xQSwDyHoBJAnFEAn6IwA/s117LAgzRDitOiWAJjNE2FSUCjIdwKwAZg5+HIC
pascal@265 120 ifhQtALNE5VeWFpyoJVBjuGAxwJPdFFOdfSM4ZU4wXVFiMj+xrEBOOZ1O4j0
pascal@265 121 /sW2AID9UHIwOi7wAXIqtQBgvt4B/kQMU+gxAFvoOAB1FlKYzRO4AQLNE1rQ
pascal@265 122 1Dpk/nXqRgjkdeVh64sWB7AxLAO0DrsHAM0QPA1088OwDejv/6wIwHX4w79s
pascal@265 123 BLFbZQINuA0BZToNdArNFnT0mM0Wju9Hw1g6AEluc2VydCBkaXNrIDEuBw0A
pascal@265 124 AA==
pascal@265 125 ====
pascal@265 126 EOT
pascal@265 127
pascal@265 128 # Get setup
pascal@265 129 setupsz=$(getlong $SetupSzOfs $bs)
pascal@265 130 setupszb=$(( $setupsz & 255 ))
pascal@265 131 dd if=$KERNEL bs=512 skip=1 count=$setupszb 2> /dev/null >> $bs
pascal@265 132
pascal@265 133 if [ -n "$TRACKS" ]; then
pascal@265 134 [ -n "$DEBUG" ] && echo -n "--tracks " 1>&2
pascal@265 135 n=$(getlong $CylinderCount $bs)
pascal@265 136 store16 $CylinderCount $(( ($n & -256) + $TRACKS )) $bs
pascal@265 137 fi
pascal@265 138 if [ -n "$FLAGS" ]; then
pascal@265 139 [ -n "$DEBUG" ] && echo -n "--flags " 1>&2
pascal@265 140 store16 $FlagsOfs $FLAGS $bs
pascal@265 141 fi
pascal@265 142 if [ -n "$VIDEO" ]; then
pascal@265 143 [ -n "$DEBUG" ] && echo -n "--video " 1>&2
pascal@265 144 store16 $VideoModeOfs $VIDEO $bs
pascal@265 145 fi
pascal@265 146 if [ -n "$RDEV" ]; then
pascal@265 147 if [ "$(dirname $RDEV)" == "/dev" -a -b $RDEV ]; then
pascal@265 148 [ -n "$DEBUG" ] && echo -n "--rdev " 1>&2
pascal@265 149 RDEV=$(stat -c '0x%02t%02T' $RDEV 2> /dev/null)
pascal@265 150 store16 $RootDevOfs $RDEV $bs
pascal@265 151 fi
pascal@265 152 fi
pascal@265 153
pascal@265 154 # Store cmdline after setup
pascal@265 155 if [ -n "$CMDLINE" ]; then
pascal@265 156 [ -n "$DEBUG" ] && echo -n "--cmdline '$CMDLINE' " 1>&2
pascal@265 157 echo -n "$CMDLINE" | dd bs=512 count=1 conv=sync 2> /dev/null >> $bs
pascal@265 158 storelong $ArgPtrOfs $(( $SetupBase + $stacktop )) $bs
pascal@265 159 fi
pascal@265 160
pascal@265 161 # Compute initramfs size
pascal@265 162 initrdlen=0
pascal@265 163 for i in $( echo $INITRD | sed 's/,/ /' ); do
pascal@265 164 [ -s "$i" ] || continue
pascal@265 165 [ -n "$DEBUG" ] && echo "--initrd $i " 1>&2
pascal@265 166 initrdlen=$(( ($initrdlen + $(stat -c %s $i) + 3) & -4 ))
pascal@265 167 done
pascal@265 168 if [ $initrdlen -ne 0 ]; then
pascal@265 169 [ -n "$DEBUG" ] && echo "initrdlen = $initrdlen " 1>&2
pascal@265 170 storelong $RamfsAdrOfs \
pascal@265 171 $(( (0x1000000 - $initrdlen) & 0xFFFF0000 )) $bs
pascal@265 172 storelong $RamfsLenOfs $initrdlen $bs
pascal@265 173 fi
pascal@265 174
pascal@265 175 # Output boot sector + setup + cmdline
pascal@265 176 dd if=$bs 2> /dev/null
pascal@265 177
pascal@265 178 # Output kernel code
pascal@265 179 dd if=$KERNEL bs=512 skip=$(( $setupszb + 1 )) 2> /dev/null
pascal@265 180
pascal@265 181 # Pad to next sector
pascal@265 182 Kpad=$(( 512 - ($(stat -c %s $KERNEL) & 511) ))
pascal@265 183 [ $Kpad -eq 512 ] || dd if=/dev/zero bs=1 count=$Kpad 2> /dev/null
pascal@265 184
pascal@265 185 # Output initramfs
pascal@265 186 padding=0
pascal@265 187 for i in $( echo $INITRD | sed 's/,/ /' ); do
pascal@265 188 [ -s "$i" ] || continue
pascal@265 189 [ $padding -ne 0 ] && dd if=/dev/zero bs=1 count=$padding 2> /dev/null
pascal@265 190 dd if=$i 2> /dev/null
pascal@265 191 padding=$(( 4 - ($(stat -c %s $i) & 3) ))
pascal@265 192 [ $padding -eq 4 ] && padding=0
pascal@265 193 done
pascal@265 194
pascal@265 195 # Cleanup
pascal@265 196 rm -f $bs
pascal@265 197 }
pascal@265 198
pascal@265 199 if [ "$FORMAT" == "0" ]; then # unsplitted
pascal@265 200 floppyset > $PREFIX
pascal@265 201 PAD=$(( 512 - ($(stat -c %s $PREFIX) % 512) ))
pascal@265 202 [ $PAD -ne 512 ] && dd if=/dev/zero bs=1 count=$PAD >> $PREFIX 2> /dev/null
pascal@265 203 exit
pascal@265 204 fi
pascal@265 205 floppyset | split -b ${FORMAT}k /dev/stdin floppy$$
pascal@265 206 i=1
pascal@265 207 ls floppy$$* | while read file ; do
pascal@265 208 output=$PREFIX$(printf "%03d" $i)
pascal@265 209 cat $file /dev/zero | dd bs=1k count=$FORMAT conv=sync of=$output 2> /dev/null
pascal@265 210 echo $output
pascal@265 211 rm -f $file
pascal@265 212 i=$(( $i + 1 ))
pascal@265 213 done