#!/bin/sh

# Configuration options
PURESTART=8323072               # Start offset
ROMSTART=2961113088             # Start offset + 0xB??????? prefix
ROM="./MARIO64.Z64"             # ROM file
ROM_MODEL="./MARIO-MODEL.Z64"   # Unmodified ROM file
BINDIR="./bin"


##
## Prerequisites
##

# Create a clean copy of our ROM
cp ${ROM_MODEL} ${ROM}


##
## Checks
##

# Check for `f2c`
if [ ! -f ./f2c ]
then
    echo "Can't find \"f2c\" binary."
    exit 1
fi

# Check for `putbin`
if [ ! -f ./putbin ]
then
    echo "Can't find \"putbin\" binary."
    exit 1
fi


##
## User binary
##

# Build user binary
make -C ${BINDIR}

# Error checking...
if [ "$?" != 0 ]
then
        echo "Problem building binary."
        exit 1
fi


##
## Stage 2
##

# Copy the game's entry point to be replaced
dd if=${ROM} bs=1 skip=4096 count=1024 | ./f2c entry_point > stage2/game-ep.c

# Move user binary to stage2
cp -vf ${BINDIR}/bin.a ./stage2/bin.a

# Clean & build
make -C stage2 clean
make -C stage2

# Error checking
if [ "$?" != 0 ]
then
        echo "Problem building stage2."
        exit 1
fi


##
## Stage 1
##

# Get filesize of stage 2 binary
STAGE2SIZE=`stat --printf="%s" stage2/nbl-stage2.bin`

# Calculate ROM ending address
ROMEND=`echo ${ROMSTART} ${STAGE2SIZE} + p | dc`

# Generate config.h
rm -fv ./stage1/config.h
echo "#ifndef __N64BL_CONF_H__" >> ./stage1/config.h
echo "#define __N64BL_CONF_H__" >> ./stage1/config.h
echo "#define BL_STACK_TMP      0x807FFFF0" >> ./stage1/config.h
echo "#define BL_ROM_START      `printf "0x%08X" ${ROMSTART}`" >> ./stage1/config.h
echo "#define BL_ROM_END        `printf "0x%08X" ${ROMEND}`" >> ./stage1/config.h
echo "#define BL_RAM_START      0xA0400000" >> ./stage1/config.h
echo "#endif /* __N64BL_CONF_H__ */" >> ./stage1/config.h

# Clean & build
make -C stage1 clean
make -C stage1


##
## Finishing touches
##

# Copy the binaries to their respective locations
./putbin ./stage1/nbl-stage1.bin ${ROM} 1000
./putbin ./stage2/nbl-stage2.bin ${ROM} `printf "%08X" ${PURESTART}`

# Fix the ROM CRC
ucon64 --n64 --chk ${ROM}