c464f67955
Old ARM systems used to pass the machine type in the ATAGS list passed to the kernel. This has been largely deprecated by the introduction of device trees. Switch to the DTOnly machine type by default in gem5 since all new platforms and kernel will require this behavior. Change-Id: Icfd085e4862863b4ef495566bfddbd11591866c3 Signed-off-by: Andreas Sandberg <andreas.sandberg@arm.com> Reviewed-by: Nikos Nikoleris <nikos.nikoleris@arm.com> Reviewed-on: https://gem5-review.googlesource.com/4260 Reviewed-by: Jason Lowe-Power <jason@lowepower.com>
114 lines
5.0 KiB
Python
114 lines
5.0 KiB
Python
# Copyright (c) 2009, 2012-2013, 2015 ARM Limited
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# All rights reserved.
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#
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# The license below extends only to copyright in the software and shall
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# not be construed as granting a license to any other intellectual
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# property including but not limited to intellectual property relating
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# to a hardware implementation of the functionality of the software
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# licensed hereunder. You may use the software subject to the license
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# terms below provided that you ensure that this notice is replicated
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# unmodified and in its entirety in all distributions of the software,
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# modified or unmodified, in source code or in binary form.
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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: Ali Saidi
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from m5.params import *
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from m5.SimObject import *
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from System import System
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class ArmMachineType(Enum):
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map = {
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'RealViewEB' : 827,
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'RealViewPBX' : 1901,
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'VExpress_EMM' : 2272,
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'VExpress_EMM64' : 2272,
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'DTOnly' : -1,
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}
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class ArmSystem(System):
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type = 'ArmSystem'
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cxx_header = "arch/arm/system.hh"
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load_addr_mask = 0xffffffff
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multi_proc = Param.Bool(True, "Multiprocessor system?")
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boot_loader = VectorParam.String([],
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"File that contains the boot loader code. Zero or more files may be "
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"specified. The first boot loader that matches the kernel's "
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"architecture will be used.")
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gic_cpu_addr = Param.Addr(0, "Addres of the GIC CPU interface")
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flags_addr = Param.Addr(0, "Address of the flags register for MP booting")
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have_security = Param.Bool(False,
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"True if Security Extensions are implemented")
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have_virtualization = Param.Bool(False,
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"True if Virtualization Extensions are implemented")
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have_lpae = Param.Bool(True, "True if LPAE is implemented")
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highest_el_is_64 = Param.Bool(False,
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"True if the register width of the highest implemented exception level "
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"is 64 bits (ARMv8)")
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reset_addr_64 = Param.Addr(0x0,
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"Reset address if the highest implemented exception level is 64 bits "
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"(ARMv8)")
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phys_addr_range_64 = Param.UInt8(40,
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"Supported physical address range in bits when using AArch64 (ARMv8)")
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have_large_asid_64 = Param.Bool(False,
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"True if ASID is 16 bits in AArch64 (ARMv8)")
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m5ops_base = Param.Addr(0,
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"Base of the 64KiB PA range used for memory-mapped m5ops. Set to 0 "
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"to disable.")
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class GenericArmSystem(ArmSystem):
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type = 'GenericArmSystem'
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cxx_header = "arch/arm/system.hh"
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load_addr_mask = 0x0fffffff
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machine_type = Param.ArmMachineType('DTOnly',
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"Machine id from http://www.arm.linux.org.uk/developer/machines/")
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atags_addr = Param.Addr("Address where default atags structure should " \
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"be written")
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dtb_filename = Param.String("",
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"File that contains the Device Tree Blob. Don't use DTB if empty.")
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early_kernel_symbols = Param.Bool(False,
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"enable early kernel symbol tables before MMU")
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enable_context_switch_stats_dump = Param.Bool(False, "enable stats/task info dumping at context switch boundaries")
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panic_on_panic = Param.Bool(False, "Trigger a gem5 panic if the " \
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"guest kernel panics")
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panic_on_oops = Param.Bool(False, "Trigger a gem5 panic if the " \
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"guest kernel oopses")
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class LinuxArmSystem(GenericArmSystem):
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type = 'LinuxArmSystem'
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cxx_header = "arch/arm/linux/system.hh"
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@cxxMethod
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def dumpDmesg(self):
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"""Dump dmesg from the simulated kernel to standard out"""
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pass
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class FreebsdArmSystem(GenericArmSystem):
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type = 'FreebsdArmSystem'
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cxx_header = "arch/arm/freebsd/system.hh"
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