# Copyright (c) 2022 Advanced Micro Devices, Inc.
# All rights reserved.
#
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# 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
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# POSSIBILITY OF SUCH DAMAGE.

import m5
import runfs
import base64
import tempfile
import argparse
import sys
import os

from amd import AmdGPUOptions
from common import Options
from common import GPUTLBOptions
from ruby import Ruby


demo_runscript = '''\
export LD_LIBRARY_PATH=/opt/rocm/lib:$LD_LIBRARY_PATH
export HSA_ENABLE_SDMA=0
dmesg -n3
dd if=/root/roms/vega10.rom of=/dev/mem bs=1k seek=768 count=128
if [ ! -f /lib/modules/`uname -r`/updates/dkms/amdgpu.ko ]; then
    echo "ERROR: Missing DKMS package for kernel `uname -r`. Exiting gem5."
    /sbin/m5 exit
fi
modprobe -v amdgpu ip_block_mask=0xff ppfeaturemask=0 dpm=0 audio=0
echo "Running {} {}"
echo "{}" | base64 -d > myapp
chmod +x myapp
./myapp {}
/sbin/m5 exit
'''

def addDemoOptions(parser):
    parser.add_argument("-a", "--app", default=None,
                        help="GPU application to run")
    parser.add_argument("-o", "--opts", default="",
                        help="GPU application arguments")

if __name__ == "__m5_main__":
    parser = argparse.ArgumentParser()
    runfs.addRunFSOptions(parser)
    Options.addCommonOptions(parser)
    AmdGPUOptions.addAmdGPUOptions(parser)
    Ruby.define_options(parser)
    GPUTLBOptions.tlb_options(parser)
    addDemoOptions(parser)

    # Parse now so we can override options
    args = parser.parse_args()

    # Create temp script to run application
    if args.app is None:
        print("No application given. Use %s -a <app>" % sys.argv[0])
        sys.exit(1)
    elif args.kernel is None:
        print("No kernel path given. Use %s --kernel <vmlinux>" % sys.argv[0])
        sys.exit(1)
    elif args.disk_image is None:
        print("No disk path given. Use %s --disk-image <linux>" % sys.argv[0])
        sys.exit(1)
    elif args.gpu_mmio_trace is None:
        print("No MMIO trace path. Use %s --gpu-mmio-trace <path>"
                % sys.argv[0])
        sys.exit(1)
    elif not os.path.isfile(args.app):
        print("Could not find applcation", args.app)
        sys.exit(1)

    with open(os.path.abspath(args.app), 'rb') as binfile:
        encodedBin = base64.b64encode(binfile.read()).decode()

    _, tempRunscript = tempfile.mkstemp()
    with open(tempRunscript, 'w') as b64file:
        runscriptStr = demo_runscript.format(args.app, args.opts, encodedBin,
                                             args.opts)
        b64file.write(runscriptStr)

    if args.second_disk == None:
        args.second_disk = args.disk_image

    # Defaults for Vega10
    args.ruby = True
    args.cpu_type = 'X86KvmCPU'
    args.num_cpus = 1
    args.mem_size = '3GB'
    args.dgpu = True
    args.dgpu_mem_size = '16GB'
    args.dgpu_start = '0GB'
    args.checkpoint_restore = 0
    args.disjoint = True
    args.timing_gpu = True
    args.script = tempRunscript
    args.dgpu_xor_low_bit = 0

    # Run gem5
    runfs.runGpuFSSystem(args)