#!/bin/sh

BL1=bl1.bin.hardkernel
UBOOT=u-boot.bin

if [ -z $1 ]; then
        echo "usage ./sd_freebsd.sh <SD card reader's device file>"
        exit 0
fi

if [ ! -f $BL1 ]; then
        echo "Error: $BL1 does not exist."
        exit 0
fi

if [ ! -f $UBOOT ]; then
        echo "Error: $UBOOT does not exist."
        exit 0
fi

# Write BL1 / MBR
dd if=$BL1 of=$1 bs=512
# Write U-boot
dd if=$UBOOT of=$1 bs=512 seek=64 conv=sync
# Zero out U-boot Environment 
dd if=/dev/zero of=$1 bs=512 seek=1024 count=64

# Create MBR GEOM
gpart create -s mbr `basename $1`
# Add MSDOS partition to contain kernel.bin
gpart add -t fat16 -b 1134 -s 64M `basename $1`
# Add FreeBSD partition
gpart add -t freebsd -b 132174 `basename $1`

# Creating the MBR GEOM may have cleared the
# MBR bootcode in block zero so refresh it.
dd if=$BL1 bs=512 count=1 of=bl1-mbr.tmp
gpart bootcode -b bl1-mbr.tmp `basename $1`
rm -f bl1-mbr.tmp

# Format filesystems
newfs_msdos -F 16 ${1}s1
newfs ${1}s2

echo "Successfully partitioned and wrote boot code to $1"