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unpack ramdisk with MTK (Mediatek) header #36

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unpack ramdisk with MTK (Mediatek) header #36

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20 changes: 20 additions & 0 deletions mkboot
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Original file line number Diff line number Diff line change
Expand Up @@ -263,6 +263,26 @@ escaped_cmd_line=`echo $cmd_line | sed "s/'/$esq/g"`
printf "kernel=kernel\nramdisk=ramdisk\n${s_name}${dt_name}page_size=$page_size\n\
kernel_size=$kernel_size\nramdisk_size=$ramdisk_size\n${s_size}${dt_size}base_addr=$base_addr\nkernel_offset=$kernel_offset\n\
ramdisk_offset=$ramdisk_offset\ntags_offset=$tags_offset\ncmd_line=\'$escaped_cmd_line\'\nboard=\"$board\"\n" > img_info

# MTK ramdisk (MTK Header Size 512, MAGIC 0x58881688)
mtk_header_magic="58881688"
ramdisk_packed_header=$(od -A n -X -j 0 -N 4 ramdisk.packed | sed 's/ //g')
if [ $ramdisk_packed_header = $mtk_header_magic ]; then
mv ramdisk.packed ramdisk.packed.mtk
dd if=ramdisk.packed.mtk of=ramdisk.packed ibs=512 skip=1 2>/dev/null
dd if=ramdisk.packed.mtk of=ramdisk.mtk_header bs=512 count=1 2>/dev/null
partition_size=$(od -A n -D -j 4 -N 4 ramdisk.packed.mtk | sed 's/ //g')
#partition_name=$(od -A n -c -j 8 -N 32 ramdisk.packed.mtk | sed 's/ //g' | sed ':a;N;$!ba;s/\n//g' | sed 's/\\0//g')
partition_name=$(od -A n -S1 -j 8 -N 32 ramdisk.packed.mtk)
escaped_partition_name=`echo $partition_name | sed "s/'/$esq/g"`
printf "ramdisk has a MTK header:\n\tpartition_size=${partition_size}\n\tpartition_name=$escaped_partition_name\n" >> img_info
pout " ramdisk has a MTK header"
pout " header_size : 512"
pout " partition_size : $partition_size"
pout " partition_name : $escaped_partition_name"
rm -f ramdisk.packed.mtk
fi

mkdir ramdisk
cd ramdisk

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