# Copyright (c) 2012-2013 ARM Limited
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#
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# not be construed as granting a license to any other intellectual
# property including but not limited to intellectual property relating
# to a hardware implementation of the functionality of the software
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#
# Copyright (c) 2006-2008 The Regents of The University of Michigan
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# modification, are permitted provided that the following conditions are
# met: redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer;
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# neither the name of the copyright holders nor the names of its
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# this software without specific prior written permission.
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# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

# Simple test script
#
# "m5 test.py"

import argparse
import sys
import os

import m5
from m5.defines import buildEnv
from m5.objects import *
from m5.params import NULL
from m5.util import addToPath, fatal, warn
from gem5.isas import ISA
from gem5.runtime import get_runtime_isa

addToPath('../')

from ruby import Ruby

from common import Options
from common import Simulation
from common import CacheConfig
from common import CpuConfig
from common import ObjectList
from common import MemConfig
from common.FileSystemConfig import config_filesystem
from common.Caches import *
from common.cpu2000 import *

def get_processes(args):
    """Interprets provided args and returns a list of processes"""

    multiprocesses = []
    inputs = []
    outputs = []
    errouts = []
    pargs = []

    workloads = args.cmd.split(';')
    if args.input != "":
        inputs = args.input.split(';')
    if args.output != "":
        outputs = args.output.split(';')
    if args.errout != "":
        errouts = args.errout.split(';')
    if args.options != "":
        pargs = args.options.split(';')

    idx = 0
    for wrkld in workloads:
        process = Process(pid = 100 + idx)
        process.executable = wrkld
        process.cwd = os.getcwd()
        process.gid = os.getgid()

        if args.env:
            with open(args.env, 'r') as f:
                process.env = [line.rstrip() for line in f]

        if len(pargs) > idx:
            process.cmd = [wrkld] + pargs[idx].split()
        else:
            process.cmd = [wrkld]

        if len(inputs) > idx:
            process.input = inputs[idx]
        if len(outputs) > idx:
            process.output = outputs[idx]
        if len(errouts) > idx:
            process.errout = errouts[idx]

        multiprocesses.append(process)
        idx += 1

    if args.smt:
        assert(args.cpu_type == "DerivO3CPU")
        return multiprocesses, idx
    else:
        return multiprocesses, 1


parser = argparse.ArgumentParser()
Options.addCommonOptions(parser)
Options.addSEOptions(parser)

if '--ruby' in sys.argv:
    Ruby.define_options(parser)

args = parser.parse_args()

multiprocesses = []
numThreads = 1

if args.bench:
    apps = args.bench.split("-")
    if len(apps) != args.num_cpus:
        print("number of benchmarks not equal to set num_cpus!")
        sys.exit(1)

    for app in apps:
        try:
            if get_runtime_isa == ISA.ARM:
                exec("workload = %s('arm_%s', 'linux', '%s')" % (
                        app, args.arm_iset, args.spec_input))
            else:
                # TARGET_ISA has been removed, but this is missing a ], so it
                # has incorrect syntax and wasn't being used anyway.
                exec("workload = %s(buildEnv['TARGET_ISA', 'linux', '%s')" % (
                        app, args.spec_input))
            multiprocesses.append(workload.makeProcess())
        except:
            print("Unable to find workload for %s: %s" %
                    (get_runtime_isa().name, app), file=sys.stderr)
            sys.exit(1)
elif args.cmd:
    multiprocesses, numThreads = get_processes(args)
else:
    print("No workload specified. Exiting!\n", file=sys.stderr)
    sys.exit(1)


(CPUClass, test_mem_mode, FutureClass) = Simulation.setCPUClass(args)
CPUClass.numThreads = numThreads

# Check -- do not allow SMT with multiple CPUs
if args.smt and args.num_cpus > 1:
    fatal("You cannot use SMT with multiple CPUs!")

np = args.num_cpus
mp0_path = multiprocesses[0].executable
system = System(cpu = [CPUClass(cpu_id=i) for i in range(np)],
                mem_mode = test_mem_mode,
                mem_ranges = [AddrRange(args.mem_size)],
                cache_line_size = args.cacheline_size)

if numThreads > 1:
    system.multi_thread = True

# Create a top-level voltage domain
system.voltage_domain = VoltageDomain(voltage = args.sys_voltage)

# Create a source clock for the system and set the clock period
system.clk_domain = SrcClockDomain(clock =  args.sys_clock,
                                   voltage_domain = system.voltage_domain)

# Create a CPU voltage domain
system.cpu_voltage_domain = VoltageDomain()

# Create a separate clock domain for the CPUs
system.cpu_clk_domain = SrcClockDomain(clock = args.cpu_clock,
                                       voltage_domain =
                                       system.cpu_voltage_domain)

# If elastic tracing is enabled, then configure the cpu and attach the elastic
# trace probe
if args.elastic_trace_en:
    CpuConfig.config_etrace(CPUClass, system.cpu, args)

# All cpus belong to a common cpu_clk_domain, therefore running at a common
# frequency.
for cpu in system.cpu:
    cpu.clk_domain = system.cpu_clk_domain

if ObjectList.is_kvm_cpu(CPUClass) or ObjectList.is_kvm_cpu(FutureClass):
    if buildEnv['USE_X86_ISA']:
        system.kvm_vm = KvmVM()
        system.m5ops_base = 0xffff0000
        for process in multiprocesses:
            process.useArchPT = True
            process.kvmInSE = True
    else:
        fatal("KvmCPU can only be used in SE mode with x86")

# Sanity check
if args.simpoint_profile:
    if not ObjectList.is_noncaching_cpu(CPUClass):
        fatal("SimPoint/BPProbe should be done with an atomic cpu")
    if np > 1:
        fatal("SimPoint generation not supported with more than one CPUs")

for i in range(np):
    if args.smt:
        system.cpu[i].workload = multiprocesses
    elif len(multiprocesses) == 1:
        system.cpu[i].workload = multiprocesses[0]
    else:
        system.cpu[i].workload = multiprocesses[i]

    if args.simpoint_profile:
        system.cpu[i].addSimPointProbe(args.simpoint_interval)

    if args.checker:
        system.cpu[i].addCheckerCpu()

    if args.bp_type:
        bpClass = ObjectList.bp_list.get(args.bp_type)
        system.cpu[i].branchPred = bpClass()

    if args.indirect_bp_type:
        indirectBPClass = \
            ObjectList.indirect_bp_list.get(args.indirect_bp_type)
        system.cpu[i].branchPred.indirectBranchPred = indirectBPClass()

    system.cpu[i].createThreads()

if args.ruby:
    Ruby.create_system(args, False, system)
    assert(args.num_cpus == len(system.ruby._cpu_ports))

    system.ruby.clk_domain = SrcClockDomain(clock = args.ruby_clock,
                                        voltage_domain = system.voltage_domain)
    for i in range(np):
        ruby_port = system.ruby._cpu_ports[i]

        # Create the interrupt controller and connect its ports to Ruby
        # Note that the interrupt controller is always present but only
        # in x86 does it have message ports that need to be connected
        system.cpu[i].createInterruptController()

        # Connect the cpu's cache ports to Ruby
        ruby_port.connectCpuPorts(system.cpu[i])
else:
    MemClass = Simulation.setMemClass(args)
    system.membus = SystemXBar()
    system.system_port = system.membus.cpu_side_ports
    CacheConfig.config_cache(args, system)
    MemConfig.config_mem(args, system)
    config_filesystem(system, args)

system.workload = SEWorkload.init_compatible(mp0_path)

if args.wait_gdb:
    system.workload.wait_for_remote_gdb = True

root = Root(full_system = False, system = system)
Simulation.run(args, root, system, FutureClass)