#!/bin/sh
#
# SPDX-License-Identifier: BSD-3-Clause
#
# Copyright © 2019 Keith Packard
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
#
# 1. Redistributions of source code must retain the above copyright
#    notice, this list of conditions and the following disclaimer.
#
# 2. Redistributions in binary form must reproduce the above
#    copyright notice, this list of conditions and the following
#    disclaimer in the documentation and/or other materials provided
#    with the distribution.
#
# 3. Neither the name of the copyright holder nor the names of its
#    contributors may be used to endorse or promote products derived
#    from this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
# FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
# COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
# INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
# (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
# SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
# STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
# OF THE POSSIBILITY OF SUCH DAMAGE.
#

qemu="qemu-system-arm"

# select the program
elf="$1"
shift

cpu=cortex-m0
machine=virtm

#
# Make sure the target machine is supported by qemu
# 
if "$qemu" -machine help | grep -q "^$machine "; then
    :
else
    echo "Skipping $elf" unsupported machine
    exit 77
fi

# Map stdio to a multiplexed character device so we can use it
# for the monitor and semihosting output

chardev=stdio,mux=on,id=stdio0

# Point the semihosting driver at our new chardev

semi=enable=on,chardev=stdio0

input=""

case "$1" in
    --)
	semi="$semi",arg="$2"
	shift
	shift
	;;
    -*|"")
	;;
    *)
	semi="$semi",arg="$1"
	input="$1"
	shift
	;;
esac

# Disable monitor

mon=none

# Disable serial

serial=none

echo "$input" | "$qemu" \
      -chardev "$chardev" \
      -semihosting-config "$semi" \
      -monitor "$mon" \
      -serial "$serial" \
      -machine "$machine",accel=tcg \
      -cpu "$cpu" \
      -device loader,file="$elf",cpu-num=0 \
      -nographic \
      "$@"
