| # Copyright (c) 2015-2018 Advanced Micro Devices, Inc. |
| # All rights reserved. |
| # |
| # For use for simulation and test purposes only |
| # |
| # Redistribution and use in source and binary forms, with or without |
| # modification, are permitted provided that the following conditions are met: |
| # |
| # 1. Redistributions of source code must retain the above copyright notice, |
| # this list of conditions and the following disclaimer. |
| # |
| # 2. 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. |
| # |
| # 3. Neither the name of the copyright holder 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 A PARTICULAR PURPOSE |
| # ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE |
| # LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| # CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| # SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| # INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| # CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| # ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
| # POSSIBILITY OF SUCH DAMAGE. |
| |
| from m5.defines import buildEnv |
| from m5.params import * |
| from m5.proxy import * |
| from m5.SimObject import SimObject |
| |
| from m5.objects.Bridge import Bridge |
| from m5.objects.ClockedObject import ClockedObject |
| from m5.objects.Device import DmaDevice |
| from m5.objects.LdsState import LdsState |
| from m5.objects.Process import EmulatedDriver |
| |
| class PrefetchType(Enum): vals = [ |
| 'PF_CU', |
| 'PF_PHASE', |
| 'PF_WF', |
| 'PF_STRIDE', |
| 'PF_END', |
| ] |
| |
| class GfxVersion(ScopedEnum): vals = [ |
| 'gfx801', |
| 'gfx803', |
| 'gfx900', |
| 'gfx902', |
| ] |
| |
| class PoolManager(SimObject): |
| type = 'PoolManager' |
| abstract = True |
| cxx_class = 'gem5::PoolManager' |
| cxx_header = "gpu-compute/pool_manager.hh" |
| |
| min_alloc = Param.Int(4, 'min number of VGPRs allocated per WF') |
| pool_size = Param.Int(2048, 'number of vector registers per SIMD') |
| |
| # The simple pool manage only allows one workgroup to |
| # be executing on a CU at any given time. |
| class SimplePoolManager(PoolManager): |
| type = 'SimplePoolManager' |
| cxx_class = 'gem5::SimplePoolManager' |
| cxx_header = "gpu-compute/simple_pool_manager.hh" |
| |
| ## This is for allowing multiple workgroups on one CU |
| class DynPoolManager(PoolManager): |
| type = 'DynPoolManager' |
| cxx_class = 'gem5::DynPoolManager' |
| cxx_header = "gpu-compute/dyn_pool_manager.hh" |
| |
| class RegisterFile(SimObject): |
| type = 'RegisterFile' |
| cxx_class = 'gem5::RegisterFile' |
| cxx_header = 'gpu-compute/register_file.hh' |
| |
| simd_id = Param.Int(-1, 'SIMD ID associated with this Register File') |
| num_regs = Param.Int(2048, 'number of registers in this RF') |
| wf_size = Param.Int(64, 'Wavefront size (in work items)') |
| |
| class ScalarRegisterFile(RegisterFile): |
| type = 'ScalarRegisterFile' |
| cxx_class = 'gem5::ScalarRegisterFile' |
| cxx_header = 'gpu-compute/scalar_register_file.hh' |
| |
| class VectorRegisterFile(RegisterFile): |
| type = 'VectorRegisterFile' |
| cxx_class = 'gem5::VectorRegisterFile' |
| cxx_header = 'gpu-compute/vector_register_file.hh' |
| |
| class RegisterManager(SimObject): |
| type = 'RegisterManager' |
| cxx_class = 'gem5::RegisterManager' |
| cxx_header = 'gpu-compute/register_manager.hh' |
| |
| policy = Param.String("static", "Register Manager Policy") |
| vrf_pool_managers = VectorParam.PoolManager('VRF Pool Managers') |
| srf_pool_managers = VectorParam.PoolManager('SRF Pool Managers') |
| |
| class Wavefront(SimObject): |
| type = 'Wavefront' |
| cxx_class = 'gem5::Wavefront' |
| cxx_header = 'gpu-compute/wavefront.hh' |
| |
| simdId = Param.Int('SIMD id (0-ComputeUnit.num_SIMDs)') |
| wf_slot_id = Param.Int('wavefront id (0-ComputeUnit.max_wfs)') |
| wf_size = Param.Int(64, 'Wavefront size (in work items)') |
| max_ib_size = Param.Int(13, 'Maximum size (in number of insts) of the ' |
| 'instruction buffer (IB).') |
| |
| # Most of the default values here are obtained from the |
| # AMD Graphics Core Next (GCN) Architecture whitepaper. |
| class ComputeUnit(ClockedObject): |
| type = 'ComputeUnit' |
| cxx_class = 'gem5::ComputeUnit' |
| cxx_header = 'gpu-compute/compute_unit.hh' |
| |
| wavefronts = VectorParam.Wavefront('Number of wavefronts') |
| # Wavefront size is 64. This is configurable, however changing |
| # this value to anything other than 64 will likely cause errors. |
| wf_size = Param.Int(64, 'Wavefront size (in work items)') |
| num_barrier_slots = Param.Int(4, 'Number of barrier slots in a CU') |
| num_SIMDs = Param.Int(4, 'number of SIMD units per CU') |
| num_scalar_cores = Param.Int(1, 'number of Scalar cores per CU') |
| num_scalar_mem_pipes = Param.Int(1, 'number of Scalar memory pipelines '\ |
| 'per CU') |
| simd_width = Param.Int(16, 'width (number of lanes) per SIMD unit') |
| |
| operand_network_length = Param.Int(1, 'number of pipe stages of operand '\ |
| 'network') |
| |
| spbypass_pipe_length = Param.Int(4, 'vector ALU Single Precision bypass '\ |
| 'latency') |
| |
| dpbypass_pipe_length = Param.Int(4, 'vector ALU Double Precision bypass '\ |
| 'latency') |
| scalar_pipe_length = Param.Int(1, 'number of pipe stages per scalar ALU') |
| issue_period = Param.Int(4, 'number of cycles per issue period') |
| |
| vrf_gm_bus_latency = Param.Int(1, 'number of cycles per use of VRF to '\ |
| 'GM bus') |
| srf_scm_bus_latency = Param.Int(1, 'number of cycles per use of SRF '\ |
| 'to Scalar Mem bus') |
| vrf_lm_bus_latency = Param.Int(1, 'number of cycles per use of VRF to '\ |
| 'LM bus') |
| |
| num_global_mem_pipes = Param.Int(1,'number of global memory pipes per CU') |
| num_shared_mem_pipes = Param.Int(1,'number of shared memory pipes per CU') |
| n_wf = Param.Int(10, 'Number of wavefront slots per SIMD') |
| mem_req_latency = Param.Int(50, "Latency for request from the cu to ruby. "\ |
| "Represents the pipeline to reach the TCP "\ |
| "and specified in GPU clock cycles") |
| mem_resp_latency = Param.Int(50, "Latency for responses from ruby to the "\ |
| "cu. Represents the pipeline between the "\ |
| "TCP and cu as well as TCP data array "\ |
| "access. Specified in GPU clock cycles") |
| system = Param.System(Parent.any, "system object") |
| cu_id = Param.Int('CU id') |
| vrf_to_coalescer_bus_width = Param.Int(64, "VRF->Coalescer data bus "\ |
| "width in bytes") |
| coalescer_to_vrf_bus_width = Param.Int(64, "Coalescer->VRF data bus "\ |
| "width in bytes") |
| |
| memory_port = VectorRequestPort("Port to the memory system") |
| translation_port = VectorRequestPort('Port to the TLB hierarchy') |
| sqc_port = RequestPort("Port to the SQC (I-cache") |
| sqc_tlb_port = RequestPort("Port to the TLB for the SQC (I-cache)") |
| scalar_port = RequestPort("Port to the scalar data cache") |
| scalar_tlb_port = RequestPort("Port to the TLB for the scalar data cache") |
| gmTokenPort = RequestPort("Port to the GPU coalesecer for sharing tokens") |
| |
| perLaneTLB = Param.Bool(False, "enable per-lane TLB") |
| prefetch_depth = Param.Int(0, "Number of prefetches triggered at a time"\ |
| "(0 turns off prefetching)") |
| prefetch_stride = Param.Int(1, "Fixed Prefetch Stride (1 means next-page)") |
| prefetch_prev_type = Param.PrefetchType('PF_PHASE', "Prefetch the stride "\ |
| "from last mem req in lane of "\ |
| "CU|Phase|Wavefront") |
| execPolicy = Param.String("OLDEST-FIRST", "WF execution selection policy"); |
| debugSegFault = Param.Bool(False, "enable debugging GPU seg faults") |
| functionalTLB = Param.Bool(False, "Assume TLB causes no delay") |
| |
| localMemBarrier = Param.Bool(False, "Assume Barriers do not wait on "\ |
| "kernel end") |
| |
| countPages = Param.Bool(False, "Generate per-CU file of all pages "\ |
| "touched and how many times") |
| scalar_mem_queue_size = Param.Int(32, "Number of entries in scalar "\ |
| "memory pipeline's queues") |
| global_mem_queue_size = Param.Int(256, "Number of entries in the global " |
| "memory pipeline's queues") |
| local_mem_queue_size = Param.Int(256, "Number of entries in the local " |
| "memory pipeline's queues") |
| max_wave_requests = Param.Int(64, "number of pending vector memory "\ |
| "requests per wavefront") |
| max_cu_tokens = Param.Int(4, "Maximum number of tokens, i.e., the number"\ |
| " of instructions that can be sent to coalescer") |
| ldsBus = Bridge() # the bridge between the CU and its LDS |
| ldsPort = RequestPort("The port that goes to the LDS") |
| localDataStore = Param.LdsState("the LDS for this CU") |
| |
| vector_register_file = VectorParam.VectorRegisterFile("Vector register "\ |
| "file") |
| |
| scalar_register_file = VectorParam.ScalarRegisterFile("Scalar register "\ |
| "file") |
| out_of_order_data_delivery = Param.Bool(False, "enable OoO data delivery" |
| " in the GM pipeline") |
| register_manager = Param.RegisterManager("Register Manager") |
| fetch_depth = Param.Int(2, 'number of i-cache lines that may be ' |
| 'buffered in the fetch unit.') |
| |
| class Shader(ClockedObject): |
| type = 'Shader' |
| cxx_class = 'gem5::Shader' |
| cxx_header = 'gpu-compute/shader.hh' |
| CUs = VectorParam.ComputeUnit('Number of compute units') |
| gpu_cmd_proc = Param.GPUCommandProcessor('Command processor for GPU') |
| dispatcher = Param.GPUDispatcher('GPU workgroup dispatcher') |
| n_wf = Param.Int(10, 'Number of wavefront slots per SIMD') |
| impl_kern_launch_acq = Param.Bool(True, """Insert acq packet into |
| ruby at kernel launch""") |
| impl_kern_end_rel = Param.Bool(False, """Insert rel packet into |
| ruby at kernel end""") |
| globalmem = Param.MemorySize('64kB', 'Memory size') |
| timing = Param.Bool(False, 'timing memory accesses') |
| |
| cpu_pointer = Param.BaseCPU(NULL, "pointer to base CPU") |
| translation = Param.Bool(False, "address translation"); |
| timer_period = Param.Clock('10us', "system timer period") |
| idlecu_timeout = Param.Tick(0, "Idle CU watchdog timeout threshold") |
| max_valu_insts = Param.Int(0, "Maximum vALU insts before exiting") |
| |
| class GPUComputeDriver(EmulatedDriver): |
| type = 'GPUComputeDriver' |
| cxx_class = 'gem5::GPUComputeDriver' |
| cxx_header = 'gpu-compute/gpu_compute_driver.hh' |
| device = Param.GPUCommandProcessor('GPU controlled by this driver') |
| isdGPU = Param.Bool(False, 'Driver is for a dGPU') |
| gfxVersion = Param.GfxVersion('gfx801', 'ISA of gpu to model') |
| dGPUPoolID = Param.Int(0, 'Pool ID for dGPU.') |
| # Default Mtype for caches |
| #-- 1 1 1 C_RW_S (Cached-ReadWrite-Shared) |
| #-- 1 1 0 C_RW_US (Cached-ReadWrite-Unshared) |
| #-- 1 0 1 C_RO_S (Cached-ReadOnly-Shared) |
| #-- 1 0 0 C_RO_US (Cached-ReadOnly-Unshared) |
| #-- 0 1 x UC_L2 (Uncached_GL2) |
| #-- 0 0 x UC_All (Uncached_All_Load) |
| # default value: 5/C_RO_S (only allow caching in GL2 for read. Shared) |
| m_type = Param.Int("Default MTYPE for cache. Valid values between 0-7"); |
| |
| class GPURenderDriver(EmulatedDriver): |
| type = 'GPURenderDriver' |
| cxx_class = 'gem5::GPURenderDriver' |
| cxx_header = 'gpu-compute/gpu_render_driver.hh' |
| |
| class GPUDispatcher(SimObject): |
| type = 'GPUDispatcher' |
| cxx_class = 'gem5::GPUDispatcher' |
| cxx_header = 'gpu-compute/dispatcher.hh' |
| |
| class GPUCommandProcessor(DmaDevice): |
| type = 'GPUCommandProcessor' |
| cxx_class = 'gem5::GPUCommandProcessor' |
| cxx_header = 'gpu-compute/gpu_command_processor.hh' |
| dispatcher = Param.GPUDispatcher('workgroup dispatcher for the GPU') |
| |
| hsapp = Param.HSAPacketProcessor('PP attached to this device') |
| |
| class StorageClassType(Enum): vals = [ |
| 'SC_SPILL', |
| 'SC_GLOBAL', |
| 'SC_GROUP', |
| 'SC_PRIVATE', |
| 'SC_READONLY', |
| 'SC_KERNARG', |
| 'SC_ARG', |
| 'SC_NONE', |
| ] |
