#!/bin/sh
#
#######################################################
#
# BuildLinux
#
# Version:	1.1
# Date:		2001/05/31
# Firstdate:2000/01/28
# Author:	FP
# Copyright:(c) 2000,2001 VAS GmbH
#
#######################################################

# $execute	: execute path for cross tools
# $linux	: root to linux kernel sources
# $kernel	: where to store cross kernels

# $host		: build tools to run on host system
# $target	: build tools to create code for target system

execute=/Data2/Projekte/CrossPPC/bin
linux=/Data2/LinuxPPC/usr/src/linux
kernel=/Data2/Projekte/DNC/CrossGCC/Kernels

# run cross compiler on host
host=i686-gnu/linux

# for target system: embedded application binary interface
#target=powerpc-motorola-eabi
#problems compiling linux kernels, so switch to linux
target=powerpc-linux

echo "host="$host", target="$target
echo "execute="$execute
echo "linux="$linux
echo "kernel="$kernel

if test -d $execute ; then
	echo "executable dir "$execute" exists"
else
	echo "executable dir "$execute" not found"
	exit -1
fi	

# add cross utils to PATH
if test -z "$(echo $PATH | grep $execute)" ; then
	echo "adding "$execute' to $PATH'
	PATH=$PATH':'$execute
	echo '$PATH='$PATH
else
	echo $execute' already in $PATH'
fi

cd $linux

if test -z "$OFFSET" ; then
	OFFSET=10000
fi

if test "$1" == "initrd" ; then
	if test "$2" == "make" ; then
		echo "building zvmlinux.initrd"
		make zImage.initrd 2>&1 | tee make.out
	fi
	echo "adjusting zvmlinux.initrd using OFFSET="$OFFSET
	cp -vb $linux/arch/ppc/mbxboot/zvmlinux.initrd $kernel/
	LOADADDR=$($target-objdump -h $kernel/zvmlinux.initrd | grep .text | awk '{print toupper($4)}')
	IMAGEOFFSET=$($target-objdump -h $kernel/zvmlinux.initrd | grep image | awk '{print toupper($6)}')
	INITRDOFFSET=$($target-objdump -h $kernel/zvmlinux.initrd | grep initrd | awk '{print toupper($6)}')
	IMAGEVMA=$(echo "obase=16;ibase=16;"$IMAGEOFFSET"+"$LOADADDR"-"$OFFSET | bc)
	INITRDVMA=$(echo "obase=16;ibase=16;"$INITRDOFFSET"+"$LOADADDR"-"$OFFSET | bc)
	echo "LOADADDR="$LOADADDR
	echo "IMAGEOFFSET="$IMAGEOFFSET
	echo "INITRDOFFSET="$INITRDOFFSET
	echo "IMAGEVMA="$IMAGEVMA
	echo "INITRDVMA="$INITRDVMA
	$target-objcopy \
		--set-section-flags=image=contents,alloc,load,readonly,data \
		--adjust-section-vma=image=0x$IMAGEVMA \
		--set-section-flags=initrd=contents,alloc,load,readonly,data \
		--adjust-section-vma=initrd=0x$INITRDVMA \
		$kernel/zvmlinux.initrd $kernel/zvmlinux2.initrd
	$target-objdump -h $kernel/zvmlinux2.initrd
elif test "$1" == "make" -o -z "$1" ; then
	if test "$1" == "make" ; then
		echo "building zvmlinux"
		make zImage 2>&1 | tee make.out
	fi
	echo "adjusting zvmlinux using OFFSET="$OFFSET
	cp -vb $linux/arch/ppc/mbxboot/zvmlinux $kernel/
	LOADADDR=$($target-objdump -h $kernel/zvmlinux | grep .text | awk '{print toupper($4)}')
	IMAGEOFFSET=$($target-objdump -h $kernel/zvmlinux | grep image | awk '{print toupper($6)}')
	IMAGEVMA=$(echo "obase=16;ibase=16;"$IMAGEOFFSET"+"$LOADADDR"-"$OFFSET | bc)
	echo "LOADADDR="$LOADADDR
	echo "IMAGEOFFSET="$IMAGEOFFSET
	echo "IMAGEVMA="$IMAGEVMA
	$target-objcopy \
		--set-section-flags=image=contents,alloc,load,readonly,data \
		--adjust-section-vma=image=0x$IMAGEVMA \
		$kernel/zvmlinux $kernel/zvmlinux2
	$target-objdump -h $kernel/zvmlinux2
else
	echo "illegal option, use:"
	echo $0 " [initrd] [make]"
	echo $0 ": 'make' to rebuild kernel image"
	echo $0 ": 'initrd' to include initial ram disk"
	echo $0 " preload \$OFFSET to use OFFSET different from 10000 [hex]"
	exit 1
fi