#!/usr/bin/env python3

# Xilinx QEMU wrapper to launch both PMU and APU instances (multiarch)
import os
import subprocess
import sys
import tempfile
import re
import shutil

binpath = os.path.dirname(os.path.abspath(__file__))
mach_path = tempfile.mkdtemp()

# Separate PMU and APU arguments
APU_args = sys.argv[1:]
PMU_args = []
PLM_args = []
bootbin_arg = None

if '-pmu-args' in APU_args:
    pmu_args_idx = APU_args.index('-pmu-args')
    PMU_args = APU_args[pmu_args_idx+1].split()
    del APU_args[pmu_args_idx:pmu_args_idx+2]

if '-plm-args' in APU_args:
    plm_args_idx = APU_args.index('-plm-args')
    PLM_args = APU_args[plm_args_idx+1].split()
    del APU_args[plm_args_idx:plm_args_idx+2]

if '-bootbin' in APU_args:
    bootbin_args_idx = APU_args.index('-bootbin')
    bootbin_arg = APU_args[bootbin_args_idx+1]
    del APU_args[bootbin_args_idx:bootbin_args_idx+2]

if PMU_args and PLM_args:
    sys.exit("\nError: -pmu-args can not be used with -plm-args\n")

help_options = ['-h', '-help', '--help']
def help(status):
    print("AMD FPGA QEMU multiarch wrapper\nVersion 2024.2\n\nUsage:")
    print(f"  {sys.argv[0]} <APU options> [-pmu-args <pmu options>]")
    print(f"  {sys.argv[0]} <APU options> [-plm-args <plm options>]\n")
    if status == 0:
        print(f"\n")
        if set(PMU_args).intersection(set(help_options)):
            print(f"PMU Options:\n")
            pmu_args_s = ' '.join(PMU_args)
            help_cmd = f'{binpath}/qemu-system-microblazeel {pmu_args_s}'
        elif set(PLM_args).intersection(set(help_options)):
            print(f"PLM Options:\n")
            plm_args_s = ' '.join(PLM_args)
            help_cmd = f'{binpath}/qemu-system-microblazeel {plm_args_s}'
        else:
            if not set(APU_args).intersection(set(help_options)):
                APU_args.append('-help')
            print(f"APU Options:\n")
            print(f"    -bootbin <boot.bin> - Use a boot.bin instead of individual firmware, device trees and bootloader\n")
            apu_args_s = ' '.join(APU_args)
            help_cmd = f'{binpath}/qemu-system-aarch64 {apu_args_s}'

        print(f"{help_cmd}\n")
        process = subprocess.Popen(help_cmd, shell=True, stderr=subprocess.PIPE)
        status = process.wait()
    sys.exit(status)

if set(APU_args).intersection(set(help_options)) or set(PMU_args).intersection(set(help_options)) or set(PLM_args).intersection(set(help_options)):
    help(0)

if not PMU_args and not PLM_args:
    help(1)

if PMU_args:
    try:
        PMU_rom = PMU_args[PMU_args.index('-kernel')+1]
    except:
        PMU_rom = ""

    if not os.path.exists(PMU_rom):
        sys.exit(f'\nERROR: Missing PMU ROM: {PMU_rom}'
            '\nSee "meta-xilinx/README.qemu.md" for more information on accquiring the PMU ROM.\n')

if bootbin_arg:
    if not os.path.isfile(bootbin_arg):
        print(f"\nERROR: bootbin file not found at {bootbin_arg}"
            "       Please build and ospi_image or set QB_OSPI_BIN variable to prebuilt file\n")
        sys.exit(1)

    shutil.copyfile(bootbin_arg, f'{mach_path}/boot.bin')

    bootgen_command = [f'{binpath}/bootgen', '-arch', 'versal', '-dump', 'boot.bin']
    subprocess.run(bootgen_command + ['bh'], check=True, cwd=mach_path, stdout=subprocess.DEVNULL)
    subprocess.run(bootgen_command + ['plm'], check=True, cwd=mach_path, stdout=subprocess.DEVNULL)
    subprocess.run(bootgen_command + ['pmc_cdo'], check=True, cwd=mach_path, stdout=subprocess.DEVNULL)

    bootgen_command = f"{binpath}/bootgen -arch versal -read {bootbin_arg}"
    result = subprocess.check_output(bootgen_command.split())
    bootgen_output = result.decode().splitlines()

    for i, l in enumerate(bootgen_output):
        if 'PARTITION HEADER TABLE (pmc_subsys.0.0)' in l:
            plm_line = bootgen_output[i+4]
        if 'BOOT HEADER' in l:
            pmc_line = bootgen_output[i+6]

    plm_load_addr = re.search(r"exec_addr_lo \(0x10\) : (0x\w*)\s*", plm_line).group(1)
    pmc_load_addr = re.search(r"pmccdo_load_addr \(0x20\) : (0x\w*)", pmc_line).group(1)

    PLM_args.append(f"-device loader,file={mach_path}/boot_bh.bin,addr=0xF201E000,force-raw=on")
    PLM_args.append(f"-device loader,file={mach_path}/pmc_cdo.bin,addr={pmc_load_addr},force-raw=on")
    PLM_args.append(f"-device loader,file={mach_path}/plm.bin,addr={plm_load_addr},force-raw=on")
    PLM_args.append(f"-device loader,addr={plm_load_addr},cpu-num=1")

# We need to switch tcp serial arguments (if they exist, e.g. qemurunner) to get the output
tcp_serial_ports = [i for i, s in enumerate(APU_args) if 'tcp:127.0.0.1:' in s]

#FIXME for next yocto release (dont need to switch ports anymore, they will be provided correctly upstream
# We can only switch these if there are exactly two, otherwise we can't assume what is being executed so we leave it as is
if len(tcp_serial_ports) == 2:
    APU_args[tcp_serial_ports[0]],APU_args[tcp_serial_ports[1]] = APU_args[tcp_serial_ports[1]],APU_args[tcp_serial_ports[0]]

mb_cmd = ""
if PMU_args:
    pmu_args_s = ' '.join(PMU_args)
    mb_cmd = f'{binpath}/qemu-system-microblazeel {pmu_args_s} -machine-path {mach_path}'
    print(f"PMU instance cmd: {mb_cmd}\n")

if PLM_args:
    plm_args_s = ' '.join(PLM_args)
    mb_cmd = f'{binpath}/qemu-system-microblazeel {plm_args_s} -machine-path {mach_path}'
    print(f"PLM instance cmd: {mb_cmd}\n")

apu_args_s = ' '.join(APU_args)
apu_cmd = f'{binpath}/qemu-system-aarch64 {apu_args_s} -machine-path {mach_path}'
print(f"APU instance cmd: {apu_cmd}\n")

if mb_cmd:
    process_mb = subprocess.Popen(mb_cmd, shell=True, stderr=subprocess.PIPE)

if apu_cmd:
    process_apu = subprocess.Popen(apu_cmd, shell=True, stderr=subprocess.PIPE)

error_msg = ""
if apu_cmd and process_apu.wait():
    # We only check for failures on the MB instance if APU fails
    error_msg += '\nQEMU APU instance failed:\n%s' % process_apu.stderr.read().decode()

    if mb_cmd and process_mb.wait():
        error_msg += '\nQEMU MB instance failed:\n%s' % process_mb.stderr.read().decode()

shutil.rmtree(mach_path)
sys.exit(error_msg)