da4f5726be
This generalized Workload SimObject is not geared towards FS or SE simulations, although currently it's only used in FS. This gets rid of the ARM specific highestELIs64 property (from the workload, not the system) and replaces it with a generic getArch. The old globally accessible kernel symtab has been replaced with a symtab accessor which takes a ThreadContext *. The parameter isn't used for anything for now, but in cases where there might be multiple symbol tables to choose from (kernel vs. current user space?) the method will now be able to distinguish which to use. This also makes it possible for the workload to manage its symbol table with whatever policy makes sense for it. That method returns a const SymbolTable * since most of the time the symbol table doesn't need to be modified. In the one case where an external entity needs to modify the table, two pseudo instructions, the table to modify isn't necessarily the one that's currently active. For instance, the pseudo instruction will likely execute in user space, but might be intended to add a symbol to the kernel in case something like a module was loaded. To support that usage, the workload has a generic "insertSymbol" method which will insert the symbol in the table that "makes sense". There is a lot of ambiguity what that means, but it's no less ambiguous than today where we're only saved by the fact that there is generally only one active symbol table to worry about. This change also introduces a KernelWorkload SimObject class which inherits from Workload and adds in kernel related members for cases where the kernel is specified in the config and loaded by gem5 itself. That's the common case, but the base Workload class would be used directly when, for instance, doing a baremetal simulation or if the kernel is loaded by software within the simulation as is the case for SPARC FS. Because a given architecture specific workload class needs to inherit from either Workload or KernelWorkload, this change removes the ability to boot ARM without a kernel. This ability should be restored in the future. To make having or not having a kernel more flexible, the kernel specific members of the KernelWorkload should be factored out into their own object which can then be attached to a workload through a (potentially unused) property rather than inheritance. Change-Id: Idf72615260266d7b4478d20d4035ed5a1e7aa241 Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/24283 Reviewed-by: Giacomo Travaglini <giacomo.travaglini@arm.com> Maintainer: Gabe Black <gabeblack@google.com> Tested-by: kokoro <noreply+kokoro@google.com>
53 lines
2.4 KiB
Python
53 lines
2.4 KiB
Python
# Copyright 2019 Google Inc.
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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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from m5.params import *
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from m5.SimObject import SimObject
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from m5.objects.SimpleMemory import *
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class Workload(SimObject):
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type = 'Workload'
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cxx_header = "sim/workload.hh"
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abstract = True
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class KernelWorkload(Workload):
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type = 'KernelWorkload'
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cxx_header = "sim/kernel_workload.hh"
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object_file = Param.String("", "File that contains the kernel code")
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extras = VectorParam.String([], "Additional object files to load")
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extras_addrs = VectorParam.Addr([],
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"Load addresses for additional object files")
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addr_check = Param.Bool(True,
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"whether to bounds check kernel addresses (disable for baremetal)")
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load_addr_mask = Param.UInt64(0xffffffffffffffff,
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"Mask to apply to kernel addresses. If zero, "
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"auto-calculated to be the most restrictive.")
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load_addr_offset = Param.UInt64(0, "Address to offset the kernel with")
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command_line = Param.String("a", "boot flags to pass to the kernel")
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