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"""
This example runs a simple linux boot.
Characteristics
---------------
* Runs exclusively on the RISC-V ISA with the classic caches
* Assumes that the kernel is compiled into the bootloader
* Automatically generates the DTB file
"""
import m5
from m5.objects import Root
from gem5.components.boards.experimental.lupv_board import LupvBoard
from gem5.components.memory.single_channel import SingleChannelDDR3_1600
from gem5.components.processors.simple_processor import SimpleProcessor
from gem5.components.processors.cpu_types import CPUTypes
from gem5.isas import ISA
from gem5.utils.requires import requires
from gem5.resources.resource import Resource, CustomResource
import argparse
# Run a check to ensure the right version of gem5 is being used.
requires(isa_required=ISA.RISCV)
from gem5.components.cachehierarchies.classic.private_l1_private_l2_cache_hierarchy import (
PrivateL1PrivateL2CacheHierarchy,
)
parser = argparse.ArgumentParser(description="Runs Linux fs test with RISCV.")
parser.add_argument(
"cpu_type",
choices=("timing", "atomic"),
help="The type of CPU in the system",
)
parser.add_argument(
"num_cpus", type=int, help="The number of CPU in the system"
)
parser.add_argument(
"--max-ticks",
type=int,
required=False,
default=m5.MaxTick,
help="The maximum number of ticks to simulate. Used for testing.",
)
args = parser.parse_args()
cache_hierarchy = PrivateL1PrivateL2CacheHierarchy(
l1d_size="32KiB", l1i_size="32KiB", l2_size="512KiB"
)
# Setup the system memory.
memory = SingleChannelDDR3_1600(size="128MB")
# Setup a single core Processor.
if args.cpu_type == "atomic":
processor = SimpleProcessor(
cpu_type=CPUTypes.ATOMIC, num_cores=args.num_cpus, isa=ISA.RISCV
)
elif args.cpu_type == "timing":
processor = SimpleProcessor(
cpu_type=CPUTypes.TIMING, num_cores=args.num_cpus, isa=ISA.RISCV
)
# Setup the board.
board = LupvBoard(
clk_freq="1GHz",
processor=processor,
memory=memory,
cache_hierarchy=cache_hierarchy,
)
# Set the Full System workload.
board.set_kernel_disk_workload(
kernel=Resource("riscv-lupio-linux-kernel"),
disk_image=Resource("riscv-lupio-busybox-img"),
)
# Begin running of the simulation.
print("Running with ISA: " + processor.get_isa().name)
print()
root = Root(full_system=True, system=board)
board._pre_instantiate()
m5.instantiate()
print("Beginning simulation!")
exit_event = m5.simulate(args.max_ticks)
print(f"Exiting @ tick {m5.curTick()} because {exit_event.getCause()}.")