litex/targets/simple.py

49 lines
1.5 KiB
Python

from migen.fhdl.std import *
from migen.bus import wishbone
from migen.genlib.io import CRG
from misoclib.soc import SoC, mem_decoder
from misoclib.com.liteethmini.phy import LiteEthPHY
from misoclib.com.liteethmini.mac import LiteEthMAC
class BaseSoC(SoC):
def __init__(self, platform, **kwargs):
SoC.__init__(self, platform,
clk_freq=int((1/(platform.default_clk_period))*1000000000),
integrated_rom_size=0x8000,
integrated_main_ram_size=16*1024,
**kwargs)
self.submodules.crg = CRG(platform.request(platform.default_clk_name))
class MiniSoC(BaseSoC):
csr_map = {
"ethphy": 20,
"ethmac": 21
}
csr_map.update(BaseSoC.csr_map)
interrupt_map = {
"ethmac": 2,
}
interrupt_map.update(BaseSoC.interrupt_map)
mem_map = {
"ethmac": 0x30000000, # (shadow @0xb0000000)
}
mem_map.update(BaseSoC.mem_map)
def __init__(self, platform, **kwargs):
BaseSoC.__init__(self, platform, **kwargs)
self.submodules.ethphy = LiteEthPHY(platform.request("eth_clocks"),
platform.request("eth"))
self.submodules.ethmac = LiteEthMAC(phy=self.ethphy, dw=32,
interface="wishbone",
with_preamble_crc=False)
self.add_wb_slave(mem_decoder(self.mem_map["ethmac"]), self.ethmac.bus)
self.add_memory_region("ethmac", self.mem_map["ethmac"] | self.shadow_base, 0x2000)
default_subtarget = BaseSoC