from operator import itemgetter from math import ceil from migen.fhdl.std import * from migen.bank import csrgen from migen.bus import wishbone, csr, lasmibus, dfi from migen.bus import wishbone2lasmi, wishbone2csr from misoclib import lm32, mor1kx, uart, identifier, timer, memtest from misoclib.sdram import lasmicon from misoclib.sdram import dfii from misoclib.sdram.minicon import Minicon def mem_decoder(address, start=26, end=29): return lambda a: a[start:end] == ((address >> (start+2)) & (2**(end-start))-1) class GenSoC(Module): csr_map = { "crg": 0, # user "uart": 1, # provided by default "identifier": 2, # provided "timer0": 3, # provided "buttons": 4, # user "leds": 5, # user } interrupt_map = { "uart": 0, "timer0": 1, } mem_map = { "rom": 0x00000000, # (shadow @0x80000000) "sram": 0x10000000, # (shadow @0x90000000) "csr": 0x60000000, # (shadow @0xe0000000) } def __init__(self, platform, clk_freq, cpu_reset_address, sram_size=4096, l2_size=0, with_uart=True, cpu_type="lm32", csr_data_width=8, csr_address_width=14): self.clk_freq = clk_freq self.cpu_reset_address = cpu_reset_address self.sram_size = sram_size self.l2_size = l2_size self.cpu_type = cpu_type self.csr_data_width = csr_data_width self.csr_address_width = csr_address_width self.cpu_memory_regions = [] self.cpu_csr_regions = [] # list of (name, origin, busword, csr_list/Memory) self._rom_registered = False # Wishbone if cpu_type == "lm32": self.submodules.cpu = lm32.LM32(platform, cpu_reset_address) elif cpu_type == "or1k": self.submodules.cpu = mor1kx.MOR1KX(platform, cpu_reset_address) else: raise ValueError("Unsupported CPU type: "+cpu_type) self.submodules.sram = wishbone.SRAM(sram_size) self.submodules.wishbone2csr = wishbone2csr.WB2CSR(bus_csr=csr.Interface(csr_data_width, csr_address_width)) # rom 0x00000000 (shadow @0x80000000) from register_rom # SRAM/debug 0x10000000 (shadow @0x90000000) provided # CSR bridge 0x60000000 (shadow @0xe0000000) provided self._wb_masters = [self.cpu.ibus, self.cpu.dbus] self._wb_slaves = [ (mem_decoder(self.mem_map["sram"]), self.sram.bus), (mem_decoder(self.mem_map["csr"]), self.wishbone2csr.wishbone) ] self.add_cpu_memory_region("sram", self.mem_map["sram"], sram_size) # CSR if with_uart: self.submodules.uart = uart.UART(platform.request("serial"), clk_freq, baud=115200) platform_id = 0x554E if not hasattr(platform, "identifier") else platform.identifier self.submodules.identifier = identifier.Identifier(platform_id, int(clk_freq), log2_int(l2_size) if l2_size else 0) self.submodules.timer0 = timer.Timer() def register_rom(self, rom_wb_if, bios_size=0xa000): if self._rom_registered: raise FinalizeError self._rom_registered = True self.add_wb_slave(mem_decoder(self.mem_map["rom"]), rom_wb_if) self.add_cpu_memory_region("rom", self.cpu_reset_address, bios_size) def add_wb_master(self, wbm): if self.finalized: raise FinalizeError self._wb_masters.append(wbm) def add_wb_slave(self, address_decoder, interface): if self.finalized: raise FinalizeError self._wb_slaves.append((address_decoder, interface)) def add_cpu_memory_region(self, name, origin, length): self.cpu_memory_regions.append((name, origin, length)) def add_cpu_csr_region(self, name, origin, busword, obj): self.cpu_csr_regions.append((name, origin, busword, obj)) def do_finalize(self): if not self._rom_registered: raise FinalizeError("Need to call GenSoC.register_rom()") # Wishbone self.submodules.wishbonecon = wishbone.InterconnectShared(self._wb_masters, self._wb_slaves, register=True) # CSR self.submodules.csrbankarray = csrgen.BankArray(self, lambda name, memory: self.csr_map[name if memory is None else name + "_" + memory.name_override], data_width=self.csr_data_width, address_width=self.csr_address_width) self.submodules.csrcon = csr.Interconnect(self.wishbone2csr.csr, self.csrbankarray.get_buses()) for name, csrs, mapaddr, rmap in self.csrbankarray.banks: self.add_cpu_csr_region(name, self.mem_map["csr"]+0x80000000+0x800*mapaddr, flen(rmap.bus.dat_w), csrs) for name, memory, mapaddr, mmap in self.csrbankarray.srams: self.add_cpu_csr_region(name, self.mem_map["csr"]+0x80000000+0x800*mapaddr, flen(rmap.bus.dat_w), memory) # Interrupts for k, v in sorted(self.interrupt_map.items(), key=itemgetter(1)): if hasattr(self, k): self.comb += self.cpu.interrupt[v].eq(getattr(self, k).ev.irq) def ns(self, t, margin=True): clk_period_ns = 1000000000/self.clk_freq if margin: t += clk_period_ns/2 return ceil(t/clk_period_ns) def do_exit(self, vns): pass class IntegratedBIOS: def __init__(self, bios_size=0x8000): self.submodules.rom = wishbone.SRAM(bios_size, read_only=True) self.register_rom(self.rom.bus, bios_size) def init_bios_memory(self, data): self.rom.mem.init = data class SDRAMSoC(GenSoC): csr_map = { "dfii": 6, "lasmicon": 7, "memtest_w": 8, "memtest_r": 9 } csr_map.update(GenSoC.csr_map) mem_map = { "sdram": 0x40000000, # (shadow @0xc0000000) } mem_map.update(GenSoC.mem_map) def __init__(self, platform, clk_freq, cpu_reset_address, with_memtest=False, sram_size=4096, l2_size=8192, with_uart=True, ramcon_type="lasmicon", **kwargs): GenSoC.__init__(self, platform, clk_freq, cpu_reset_address, sram_size, l2_size, with_uart, **kwargs) self.with_memtest = with_memtest self.ramcon_type = ramcon_type self._sdram_phy_registered = False def register_sdram_phy(self, phy_dfi, phy_settings, sdram_geom, sdram_timing): if self._sdram_phy_registered: raise FinalizeError self._sdram_phy_registered = True # DFI self.submodules.dfii = dfii.DFIInjector(sdram_geom.mux_a, sdram_geom.bank_a, phy_settings.dfi_d, phy_settings.nphases) self.submodules.dficon0 = dfi.Interconnect(self.dfii.master, phy_dfi) # LASMICON if self.ramcon_type == "lasmicon": self.submodules.lasmicon = lasmicon.LASMIcon(phy_settings, sdram_geom, sdram_timing) self.submodules.dficon1 = dfi.Interconnect(self.lasmicon.dfi, self.dfii.slave) self.submodules.lasmixbar = lasmibus.Crossbar([self.lasmicon.lasmic], self.lasmicon.nrowbits) if self.with_memtest: self.submodules.memtest_w = memtest.MemtestWriter(self.lasmixbar.get_master()) self.submodules.memtest_r = memtest.MemtestReader(self.lasmixbar.get_master()) # Wishbone bridge self.submodules.wishbone2lasmi = wishbone2lasmi.WB2LASMI(self.l2_size//4, self.lasmixbar.get_master()) self.add_wb_slave(mem_decoder(self.mem_map["sdram"]), self.wishbone2lasmi.wishbone) self.add_cpu_memory_region("sdram", self.mem_map["sdram"], 2**self.lasmicon.lasmic.aw*self.lasmicon.lasmic.dw*self.lasmicon.lasmic.nbanks//8) # MINICON elif self.ramcon_type == "minicon": self.submodules.minicon = sdramcon = Minicon(phy_settings, sdram_geom, sdram_timing) self.submodules.dficon1 = dfi.Interconnect(sdramcon.dfi, self.dfii.slave) sdram_width = flen(sdramcon.bus.dat_r) if (sdram_width == 32): self.add_wb_slave(mem_decoder(self.mem_map["sdram"]), sdramcon.bus) elif (sdram_width < 32): self.submodules.dc = wishbone.DownConverter(32, sdram_width) self.submodules.intercon = wishbone.InterconnectPointToPoint(dc.wishbone_o, sdramcon.bus) self.add_wb_slave(mem_decoder(self.mem_map["sdram"]), self.dc.wishbone_i) else: raise NotImplementedError("Unsupported SDRAM width of {} > 32".format(sdram_width)) # Wishbone bridge self.add_cpu_memory_region("sdram", self.mem_map["sdram"], 2**(sdram_geom.bank_a+sdram_geom.row_a+sdram_geom.col_a)*sdram_width//8) else: raise ValueError("Unsupported SDRAM controller type: {}".format(self.ramcon_type)) def do_finalize(self): if not self._sdram_phy_registered: raise FinalizeError("Need to call SDRAMSoC.register_sdram_phy()") GenSoC.do_finalize(self)