scripts/run-riscv

#!/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,
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# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
# OF THE POSSIBILITY OF SUCH DAMAGE.
#

qemu="qemu-system-riscv32"

# select the program
elf="$1"
shift

case "$elf" in
    *rv32*_ilp32*)
	qemu="qemu-system-riscv32"
	cpu=rv32
	;;
    *rv64*_lp64*)
	qemu="qemu-system-riscv64"
	cpu=rv64
	;;
    *)
	qemu="qemu-system-riscv64"
	options="i m a f d c"
	cpu=rv64
	;;
esac

cpu="$cpu,mmu=false,pmp=false"

if [ -z "$options" ]; then
    options="$(echo "$elf" | sed 's/.*rv[36][24]\([a-z]*\)_.*$/\1/' | sed 's/\(.\)/\1 /g')"
fi

all_options="i e g m a f d c s u"

for o in $all_options; do
    if echo "$options" | grep -q "$o"; then
	value=true
    else
	value=false
    fi
    cpu="$cpu,$o=$value"
done

# Set the target machine
machine=virt,accel=tcg

# 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

# Point the monitor at the new chardev too

mon=none

# Disable the serial port

serial=none

echo "$input" | $qemu -chardev $chardev -semihosting-config "$semi" -monitor "$mon" -serial "$serial" -machine "$machine" -cpu "$cpu" -kernel "$elf" -nographic "$@" -bios none