# Copyright (c) 2022 The Regents of the University of California
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"""
This gem5 configuration script runs a full system Ubuntu image, Linux
kernel and calls m5 exit after the kernel is loaded.

Usage
---

```
scons build/RISCV/gem5.opt

./build/RISCV/gem5.opt \
    configs/example/gem5_library/riscvmatched-fs.py
```
"""

from python.gem5.prebuilt.riscvmatched.riscvmatched_board import (
    RISCVMatchedBoard,
)
from gem5.utils.requires import requires
from gem5.isas import ISA
from gem5.simulate.simulator import Simulator
from gem5.resources.workload import Workload

requires(isa_required=ISA.RISCV)

# instantiate the riscv matched board with default parameters
board = RISCVMatchedBoard(
    clk_freq="1.2GHz",
    l2_size="2MB",
    is_fs=True,
)

# Here we a full system workload: "riscv-ubuntu-20.04-boot" which boots
# Ubuntu 20.04. Once the system successfully boots it encounters an `m5_exit`
# instruction which stops the simulation. When the simulation has ended you may
# inspect `m5out/system.pc.com_1.device` to see the stdout.
board.set_workload(Workload("riscv-ubuntu-20.04-boot"))

simulator = Simulator(board=board)
simulator.run()