bus.py

M5,一个功能强大的多处理器系统模拟器.很多针对处理器架构,性能的研究都使用它作为模拟平台

from m5 import build_env
from m5.params import *
from m5.proxy import *
from MemObject import MemObject

if build_env['FULL_SYSTEM']:
    from Device import BadAddr

class Bus(MemObject):
    type = 'Bus'
    port = VectorPort("vector port for connecting devices")
    bus_id = Param.Int(0, "blah")
    clock = Param.Clock("1GHz", "bus clock speed")
    header_cycles = Param.Int(1, "cycles of overhead per transaction")
    width = Param.Int(64, "bus width (bytes)")
    responder_set = Param.Bool(False, "Did the user specify a default responder.")
    block_size = Param.Int(64, "The default block size if one isn't set by a device attached to the bus.")
    if build_env['FULL_SYSTEM']:
        responder = BadAddr(pio_addr=0x0, pio_latency="1ps")
        default = Port(Self.responder.pio, "Default port for requests that aren't handled by a device.")
    else:
        default = Port("Default port for requests that aren't handled by a device.")