Script to build rootfs image for Aarch64

[John Dulaney <jdulaney@xxxxxxxxxxxxxxxxx>]

This script assumes that the rootfs git repo has been cloned into
the same directory as the script.  It also assumes that qemu is installed.


John Dulaney


#!/bin/bash -x
# script for creating a filesystem image for Fedora's Aarch64 port
# Copyright 2012 John Dulaney jdulaney@xxxxxxxxxxxxxxxxx
# Licensed under the GPLv3+
# Dependancies:  qemu

# Set image size
  imgsize=8G

# Create image
  qemu-img create rootfs.img $imgsize

# Add partitions to the image, a 50 MB DOS bootable partition for
# uboot, and the rest will be for /
  parted rootfs.img mklabel msdos
  parted rootfs.img mkpart primary fat16 1 50
  parted rootfs.img mkpart primary ext3 50 $imgsize
  parted rootfs.img set 1 boot on

# Mount the image in /tmp
  mkdir /tmp/ext3
  mkdir /tmp/vfat

  sudo kpartx -a -v rootfs.img

  sudo mkfs.vfat /dev/mapper/loop0p1
  sudo mkfs.ext3 /dev/mapper/loop0p2

  sudo mount /dev/mapper/loop0p1 /tmp/vfat
  sudo mount /dev/mapper/loop0p2 /tmp/ext3

# Put uboot into the vfat partition for booting
  wget http://fedorapeople.org/groups/armv8/u-boot.bin
  sudo cp u-boot.bin /tmp/vfat
  sudo sync
  sudo umount /tmp/vfat

# Copy file system into image
  cd rootfs
  sudo sh -c "find . -print | cpio -pdumv /tmp/ext3"


#Create /proc, /sys, /dev, etc. since Git doesn't seem to like empty directories
  sudo mkdir /tmp/ext3/proc
  sudo mkdir /tmp/ext3/sys
  sudo mkdir /tmp/ext3/dev
  sudo mkdir /tmp/ext3/tmp
  sudo mkdir /tmp/ext3/var/tmp

# Create special files in /dev
  chdir /tmp/ext3/dev

  sudo mknod null         c   1 3
  sudo mknod zero         c   1 5
  sudo mknod tty          c   5 0
  sudo mknod console      c   5 1
  sudo mknod sda          b   8 0
  sudo mknod sda1         b   8 1
  sudo mknod sda2         b   8 2
  sudo mknod sda3         b   8 3
  sudo mknod sda4         b   8 4
  sudo mknod mmcblk0      b 179 0
  sudo mknod mmcblk0p1    b 179 1
  sudo mknod mmcblk0p2    b 179 2
  sudo mknod mmcblk0p3    b 179 3
  sudo mknod mmcblk0p4    b 179 4
  sudo mknod ttyO0        c 253 0
  sudo mknod ttyO1        c 253 1
  sudo mknod ttyO2        c 253 2
  sudo mknod ttyO3        c 253 3
  sudo mknod tty2         c 4 2
  sudo mknod tty3         c 4 3
  sudo mknod tty4         c 4 4

  sudo mknod ttyS0        c 4 64
  sudo mknod ttyS1        c 4 65
  sudo mknod ttyS2        c 4 66
  sudo mknod ttyS3        c 4 67
  sudo chmod a+rw null zero

# Unmount the image.
  sudo sync
  sudo umount /tmp/ext3

  echo 'Completed.'
 		 	   		  
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