e17328a227
This patch ensures we can run simulations with very large simulated memories (at least 64 TB based on some quick runs on a Linux workstation). In essence this allows us to efficiently deal with sparse address maps without having to implement a redirection layer in the backing store. This opens up for run-time errors if we eventually exhausts the hosts memory and swap space, but this should hopefully never happen.
105 lines
4.8 KiB
Python
105 lines
4.8 KiB
Python
# Copyright (c) 2005-2007 The Regents of The University of Michigan
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# Copyright (c) 2011 Regents of the University of California
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# All rights reserved.
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions are
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# met: redistributions of source code must retain the above copyright
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# notice, this list of conditions and the following disclaimer;
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# redistributions in binary form must reproduce the above copyright
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# notice, this list of conditions and the following disclaimer in the
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# documentation and/or other materials provided with the distribution;
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# neither the name of the copyright holders nor the names of its
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# contributors may be used to endorse or promote products derived from
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# this software without specific prior written permission.
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#
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# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#
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# Authors: Nathan Binkert
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# Rick Strong
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from m5.SimObject import SimObject
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from m5.defines import buildEnv
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from m5.params import *
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from m5.proxy import *
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from DVFSHandler import *
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from SimpleMemory import *
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class MemoryMode(Enum): vals = ['invalid', 'atomic', 'timing',
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'atomic_noncaching']
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class System(MemObject):
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type = 'System'
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cxx_header = "sim/system.hh"
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system_port = MasterPort("System port")
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@classmethod
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def export_method_cxx_predecls(cls, code):
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code('#include "sim/system.hh"')
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@classmethod
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def export_methods(cls, code):
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code('''
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Enums::MemoryMode getMemoryMode() const;
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void setMemoryMode(Enums::MemoryMode mode);
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''')
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memories = VectorParam.AbstractMemory(Self.all,
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"All memories in the system")
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mem_mode = Param.MemoryMode('atomic', "The mode the memory system is in")
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# When reserving memory on the host, we have the option of
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# reserving swap space or not (by passing MAP_NORESERVE to
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# mmap). By enabling this flag, we accomodate cases where a large
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# (but sparse) memory is simulated.
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mmap_using_noreserve = Param.Bool(False, "mmap the backing store " \
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"without reserving swap")
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# The memory ranges are to be populated when creating the system
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# such that these can be passed from the I/O subsystem through an
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# I/O bridge or cache
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mem_ranges = VectorParam.AddrRange([], "Ranges that constitute main memory")
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cache_line_size = Param.Unsigned(64, "Cache line size in bytes")
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work_item_id = Param.Int(-1, "specific work item id")
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num_work_ids = Param.Int(16, "Number of distinct work item types")
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work_begin_cpu_id_exit = Param.Int(-1,
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"work started on specific id, now exit simulation")
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work_begin_ckpt_count = Param.Counter(0,
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"create checkpoint when work items begin count value is reached")
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work_begin_exit_count = Param.Counter(0,
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"exit simulation when work items begin count value is reached")
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work_end_ckpt_count = Param.Counter(0,
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"create checkpoint when work items end count value is reached")
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work_end_exit_count = Param.Counter(0,
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"exit simulation when work items end count value is reached")
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work_cpus_ckpt_count = Param.Counter(0,
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"create checkpoint when active cpu count value is reached")
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init_param = Param.UInt64(0, "numerical value to pass into simulator")
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boot_osflags = Param.String("a", "boot flags to pass to the kernel")
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kernel = Param.String("", "file that contains the kernel code")
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kernel_addr_check = Param.Bool(True,
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"whether to address check on kernel (disable for baremetal)")
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readfile = Param.String("", "file to read startup script from")
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symbolfile = Param.String("", "file to get the symbols from")
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load_addr_mask = Param.UInt64(0xffffffffff,
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"Address to mask loading binaries with")
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load_offset = Param.UInt64(0, "Address to offset loading binaries with")
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# Dynamic voltage and frequency handler for the system, disabled by default
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# Provide list of domains that need to be controlled by the handler
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dvfs_handler = DVFSHandler()
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