| # Copyright (c) 2016-2017, 2019, 2021-2022 Arm Limited |
| # All rights reserved. |
| # |
| # The license below extends only to copyright in the software and shall |
| # not be construed as granting a license to any other intellectual |
| # property including but not limited to intellectual property relating |
| # to a hardware implementation of the functionality of the software |
| # licensed hereunder. You may use the software subject to the license |
| # terms below provided that you ensure that this notice is replicated |
| # unmodified and in its entirety in all distributions of the software, |
| # modified or unmodified, in source code or in binary form. |
| # |
| # Redistribution and use in source and binary forms, with or without |
| # modification, are permitted provided that the following conditions are |
| # met: redistributions of source code must retain the above copyright |
| # notice, this list of conditions and the following disclaimer; |
| # redistributions in binary form must reproduce the above copyright |
| # notice, this list of conditions and the following disclaimer in the |
| # documentation and/or other materials provided with the distribution; |
| # neither the name of the copyright holders nor the names of its |
| # contributors may be used to endorse or promote products derived from |
| # this software without specific prior written permission. |
| # |
| # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| # "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| # LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
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| # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| |
| # System components used by the bigLITTLE.py configuration script |
| |
| import m5 |
| from m5.objects import * |
| |
| m5.util.addToPath("../../") |
| from common.Caches import * |
| from common import ObjectList |
| |
| have_kvm = "ArmV8KvmCPU" in ObjectList.cpu_list.get_names() |
| have_fastmodel = "FastModelCortexA76" in ObjectList.cpu_list.get_names() |
| |
| |
| class L1I(L1_ICache): |
| tag_latency = 1 |
| data_latency = 1 |
| response_latency = 1 |
| mshrs = 4 |
| tgts_per_mshr = 8 |
| size = "48kB" |
| assoc = 3 |
| |
| |
| class L1D(L1_DCache): |
| tag_latency = 2 |
| data_latency = 2 |
| response_latency = 1 |
| mshrs = 16 |
| tgts_per_mshr = 16 |
| size = "32kB" |
| assoc = 2 |
| write_buffers = 16 |
| |
| |
| class L2(L2Cache): |
| tag_latency = 12 |
| data_latency = 12 |
| response_latency = 5 |
| mshrs = 32 |
| tgts_per_mshr = 8 |
| size = "1MB" |
| assoc = 16 |
| write_buffers = 8 |
| clusivity = "mostly_excl" |
| |
| |
| class L3(Cache): |
| size = "16MB" |
| assoc = 16 |
| tag_latency = 20 |
| data_latency = 20 |
| response_latency = 20 |
| mshrs = 20 |
| tgts_per_mshr = 12 |
| clusivity = "mostly_excl" |
| |
| |
| class MemBus(SystemXBar): |
| badaddr_responder = BadAddr(warn_access="warn") |
| default = Self.badaddr_responder.pio |
| |
| |
| class ArmCpuCluster(CpuCluster): |
| def __init__( |
| self, |
| system, |
| num_cpus, |
| cpu_clock, |
| cpu_voltage, |
| cpu_type, |
| l1i_type, |
| l1d_type, |
| l2_type, |
| ): |
| super().__init__() |
| self._cpu_type = cpu_type |
| self._l1i_type = l1i_type |
| self._l1d_type = l1d_type |
| self._l2_type = l2_type |
| |
| assert num_cpus > 0 |
| |
| self.voltage_domain = VoltageDomain(voltage=cpu_voltage) |
| self.clk_domain = SrcClockDomain( |
| clock=cpu_clock, voltage_domain=self.voltage_domain |
| ) |
| |
| self.generate_cpus(cpu_type, num_cpus) |
| |
| system.addCpuCluster(self) |
| |
| def addL1(self): |
| for cpu in self.cpus: |
| l1i = None if self._l1i_type is None else self._l1i_type() |
| l1d = None if self._l1d_type is None else self._l1d_type() |
| cpu.addPrivateSplitL1Caches(l1i, l1d) |
| |
| def addL2(self, clk_domain): |
| if self._l2_type is None: |
| return |
| self.toL2Bus = L2XBar(width=64, clk_domain=clk_domain) |
| self.l2 = self._l2_type() |
| for cpu in self.cpus: |
| cpu.connectCachedPorts(self.toL2Bus.cpu_side_ports) |
| self.toL2Bus.mem_side_ports = self.l2.cpu_side |
| |
| def addPMUs(self, ints, events=[]): |
| """ |
| Instantiates 1 ArmPMU per PE. The method is accepting a list of |
| interrupt numbers (ints) used by the PMU and a list of events to |
| register in it. |
| |
| :param ints: List of interrupt numbers. The code will iterate over |
| the cpu list in order and will assign to every cpu in the cluster |
| a PMU with the matching interrupt. |
| :type ints: List[int] |
| :param events: Additional events to be measured by the PMUs |
| :type events: List[Union[ProbeEvent, SoftwareIncrement]] |
| """ |
| assert len(ints) == len(self.cpus) |
| for cpu, pint in zip(self.cpus, ints): |
| int_cls = ArmPPI if pint < 32 else ArmSPI |
| for isa in cpu.isa: |
| isa.pmu = ArmPMU(interrupt=int_cls(num=pint)) |
| isa.pmu.addArchEvents( |
| cpu=cpu, |
| itb=cpu.mmu.itb, |
| dtb=cpu.mmu.dtb, |
| icache=getattr(cpu, "icache", None), |
| dcache=getattr(cpu, "dcache", None), |
| l2cache=getattr(self, "l2", None), |
| ) |
| for ev in events: |
| isa.pmu.addEvent(ev) |
| |
| def connectMemSide(self, bus): |
| try: |
| self.l2.mem_side = bus.cpu_side_ports |
| except AttributeError: |
| for cpu in self.cpus: |
| cpu.connectCachedPorts(bus.cpu_side_ports) |
| |
| |
| class AtomicCluster(ArmCpuCluster): |
| def __init__(self, system, num_cpus, cpu_clock, cpu_voltage="1.0V"): |
| cpu_config = [ |
| ObjectList.cpu_list.get("AtomicSimpleCPU"), |
| None, |
| None, |
| None, |
| ] |
| super().__init__(system, num_cpus, cpu_clock, cpu_voltage, *cpu_config) |
| |
| def addL1(self): |
| pass |
| |
| |
| class KvmCluster(ArmCpuCluster): |
| def __init__(self, system, num_cpus, cpu_clock, cpu_voltage="1.0V"): |
| cpu_config = [ObjectList.cpu_list.get("ArmV8KvmCPU"), None, None, None] |
| super().__init__(system, num_cpus, cpu_clock, cpu_voltage, *cpu_config) |
| |
| def addL1(self): |
| pass |
| |
| |
| class FastmodelCluster(CpuCluster): |
| def __init__(self, system, num_cpus, cpu_clock, cpu_voltage="1.0V"): |
| super().__init__() |
| |
| # Setup GIC |
| gic = system.realview.gic |
| gic.sc_gic.cpu_affinities = ",".join( |
| ["0.0.%d.0" % i for i in range(num_cpus)] |
| ) |
| |
| # Parse the base address of redistributor. |
| redist_base = gic.get_redist_bases()[0] |
| redist_frame_size = 0x40000 if gic.sc_gic.has_gicv4_1 else 0x20000 |
| gic.sc_gic.reg_base_per_redistributor = ",".join( |
| [ |
| "0.0.%d.0=%#x" % (i, redist_base + redist_frame_size * i) |
| for i in range(num_cpus) |
| ] |
| ) |
| |
| gic_a2t = AmbaToTlmBridge64(amba=gic.amba_m) |
| gic_t2g = TlmToGem5Bridge64( |
| tlm=gic_a2t.tlm, gem5=system.iobus.cpu_side_ports |
| ) |
| gic_g2t = Gem5ToTlmBridge64(gem5=system.membus.mem_side_ports) |
| gic_g2t.addr_ranges = gic.get_addr_ranges() |
| gic_t2a = AmbaFromTlmBridge64(tlm=gic_g2t.tlm) |
| gic.amba_s = gic_t2a.amba |
| |
| system.gic_hub = SubSystem() |
| system.gic_hub.gic_a2t = gic_a2t |
| system.gic_hub.gic_t2g = gic_t2g |
| system.gic_hub.gic_g2t = gic_g2t |
| system.gic_hub.gic_t2a = gic_t2a |
| |
| self.voltage_domain = VoltageDomain(voltage=cpu_voltage) |
| self.clk_domain = SrcClockDomain( |
| clock=cpu_clock, voltage_domain=self.voltage_domain |
| ) |
| |
| # Setup CPU |
| assert num_cpus <= 4 |
| CpuClasses = [ |
| FastModelCortexA76x1, |
| FastModelCortexA76x2, |
| FastModelCortexA76x3, |
| FastModelCortexA76x4, |
| ] |
| CpuClass = CpuClasses[num_cpus - 1] |
| |
| cpu = CpuClass( |
| GICDISABLE=False, BROADCASTATOMIC=False, BROADCASTOUTER=False |
| ) |
| for core in cpu.cores: |
| core.semihosting_enable = False |
| core.RVBARADDR = 0x10 |
| core.redistributor = gic.redistributor |
| core.createThreads() |
| core.createInterruptController() |
| self.cpus = [cpu] |
| |
| self.cpu_hub = SubSystem() |
| a2t = AmbaToTlmBridge64(amba=cpu.amba) |
| t2g = TlmToGem5Bridge64(tlm=a2t.tlm, gem5=system.membus.cpu_side_ports) |
| self.cpu_hub.a2t = a2t |
| self.cpu_hub.t2g = t2g |
| |
| system.addCpuCluster(self) |
| |
| def require_caches(self): |
| return False |
| |
| def memory_mode(self): |
| return "atomic_noncaching" |
| |
| def addL1(self): |
| pass |
| |
| def addL2(self, clk_domain): |
| pass |
| |
| def connectMemSide(self, bus): |
| pass |
| |
| |
| class BaseSimpleSystem(ArmSystem): |
| cache_line_size = 64 |
| |
| def __init__(self, mem_size, platform, **kwargs): |
| super(BaseSimpleSystem, self).__init__(**kwargs) |
| |
| self.voltage_domain = VoltageDomain(voltage="1.0V") |
| self.clk_domain = SrcClockDomain( |
| clock="1GHz", voltage_domain=Parent.voltage_domain |
| ) |
| |
| if platform is None: |
| self.realview = VExpress_GEM5_V1() |
| else: |
| self.realview = platform |
| |
| if hasattr(self.realview.gic, "cpu_addr"): |
| self.gic_cpu_addr = self.realview.gic.cpu_addr |
| |
| self.terminal = Terminal() |
| self.vncserver = VncServer() |
| |
| self.iobus = IOXBar() |
| # Device DMA -> MEM |
| self.mem_ranges = self.getMemRanges(int(Addr(mem_size))) |
| |
| self._clusters = [] |
| |
| def getMemRanges(self, mem_size): |
| """ |
| Define system memory ranges. This depends on the physical |
| memory map provided by the realview platform and by the memory |
| size provided by the user (mem_size argument). |
| The method is iterating over all platform ranges until they cover |
| the entire user's memory requirements. |
| """ |
| mem_ranges = [] |
| for mem_range in self.realview._mem_regions: |
| size_in_range = min(mem_size, mem_range.size()) |
| |
| mem_ranges.append( |
| AddrRange(start=mem_range.start, size=size_in_range) |
| ) |
| |
| mem_size -= size_in_range |
| if mem_size == 0: |
| return mem_ranges |
| |
| raise ValueError("memory size too big for platform capabilities") |
| |
| def numCpuClusters(self): |
| return len(self._clusters) |
| |
| def addCpuCluster(self, cpu_cluster): |
| self._clusters.append(cpu_cluster) |
| |
| def addCaches(self, need_caches, last_cache_level): |
| if not need_caches: |
| # connect each cluster to the memory hierarchy |
| for cluster in self._clusters: |
| cluster.connectMemSide(self.membus) |
| return |
| |
| cluster_mem_bus = self.membus |
| assert last_cache_level >= 1 and last_cache_level <= 3 |
| for cluster in self._clusters: |
| cluster.addL1() |
| if last_cache_level > 1: |
| for cluster in self._clusters: |
| cluster.addL2(cluster.clk_domain) |
| if last_cache_level > 2: |
| max_clock_cluster = max( |
| self._clusters, key=lambda c: c.clk_domain.clock[0] |
| ) |
| self.l3 = L3(clk_domain=max_clock_cluster.clk_domain) |
| self.toL3Bus = L2XBar(width=64) |
| self.toL3Bus.mem_side_ports = self.l3.cpu_side |
| self.l3.mem_side = self.membus.cpu_side_ports |
| cluster_mem_bus = self.toL3Bus |
| |
| # connect each cluster to the memory hierarchy |
| for cluster in self._clusters: |
| cluster.connectMemSide(cluster_mem_bus) |
| |
| |
| class SimpleSystem(BaseSimpleSystem): |
| """ |
| Meant to be used with the classic memory model |
| """ |
| |
| def __init__(self, caches, mem_size, platform=None, **kwargs): |
| super(SimpleSystem, self).__init__(mem_size, platform, **kwargs) |
| |
| self.membus = MemBus() |
| # CPUs->PIO |
| self.iobridge = Bridge(delay="50ns") |
| |
| self._caches = caches |
| if self._caches: |
| self.iocache = IOCache(addr_ranges=self.mem_ranges) |
| else: |
| self.dmabridge = Bridge(delay="50ns", ranges=self.mem_ranges) |
| |
| def connect(self): |
| self.iobridge.mem_side_port = self.iobus.cpu_side_ports |
| self.iobridge.cpu_side_port = self.membus.mem_side_ports |
| |
| if self._caches: |
| self.iocache.mem_side = self.membus.cpu_side_ports |
| self.iocache.cpu_side = self.iobus.mem_side_ports |
| else: |
| self.dmabridge.mem_side_port = self.membus.cpu_side_ports |
| self.dmabridge.cpu_side_port = self.iobus.mem_side_ports |
| |
| if hasattr(self.realview.gic, "cpu_addr"): |
| self.gic_cpu_addr = self.realview.gic.cpu_addr |
| self.realview.attachOnChipIO(self.membus, self.iobridge) |
| self.realview.attachIO(self.iobus) |
| self.system_port = self.membus.cpu_side_ports |
| |
| def attach_pci(self, dev): |
| self.realview.attachPciDevice(dev, self.iobus) |
| |
| |
| class ArmRubySystem(BaseSimpleSystem): |
| """ |
| Meant to be used with ruby |
| """ |
| |
| def __init__(self, mem_size, platform=None, **kwargs): |
| super(ArmRubySystem, self).__init__(mem_size, platform, **kwargs) |
| self._dma_ports = [] |
| self._mem_ports = [] |
| |
| def connect(self): |
| self.realview.attachOnChipIO( |
| self.iobus, dma_ports=self._dma_ports, mem_ports=self._mem_ports |
| ) |
| |
| self.realview.attachIO(self.iobus, dma_ports=self._dma_ports) |
| |
| for cluster in self._clusters: |
| for i, cpu in enumerate(cluster.cpus): |
| self.ruby._cpu_ports[i].connectCpuPorts(cpu) |
| |
| def attach_pci(self, dev): |
| self.realview.attachPciDevice( |
| dev, self.iobus, dma_ports=self._dma_ports |
| ) |
