dec0025dea
Add an option to automatically set the aarch64 reset vector to the entry point of the kernel. This is useful when running bare metal workloads that don't use a normal boot loader. Change-Id: Id472f865d461f0d8d8ea8efe5db582c170de0b90 Signed-off-by: Andreas Sandberg <andreas.sandberg@arm.com> Reviewed-by: Nikos Nikoleris <nikos.nikoleris@arm.com> Reviewed-by: Giacomo Gabrielli <giacomo.gabrielli@arm.com> Reviewed-on: https://gem5-review.googlesource.com/8143 Reviewed-by: Giacomo Travaglini <giacomo.travaglini@arm.com>
153 lines
6.5 KiB
Python
153 lines
6.5 KiB
Python
# Copyright (c) 2009, 2012-2013, 2015-2018 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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# Glenn Bergmans
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from m5.params import *
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from m5.SimObject import *
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from m5.util.fdthelper 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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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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auto_reset_addr_64 = Param.Bool(False,
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"Determine reset address from kernel entry point if no boot loader")
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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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def generateDeviceTree(self, state):
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# Generate a device tree root node for the system by creating the root
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# node and adding the generated subnodes of all children.
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# When a child needs to add multiple nodes, this is done by also
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# creating a node called '/' which will then be merged with the
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# root instead of appended.
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def generateMemNode(mem_range):
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node = FdtNode("memory@%x" % long(mem_range.start))
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node.append(FdtPropertyStrings("device_type", ["memory"]))
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node.append(FdtPropertyWords("reg",
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state.addrCells(mem_range.start) +
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state.sizeCells(mem_range.size()) ))
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return node
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root = FdtNode('/')
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root.append(state.addrCellsProperty())
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root.append(state.sizeCellsProperty())
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# Add memory nodes
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for mem_range in self.mem_ranges:
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root.append(generateMemNode(mem_range))
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for node in self.recurseDeviceTree(state):
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# Merge root nodes instead of adding them (for children
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# that need to add multiple root level nodes)
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if node.get_name() == root.get_name():
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root.merge(node)
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else:
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root.append(node)
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return root
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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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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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# Have Linux systems for ARM auto-calc their load_addr_mask for proper
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# kernel relocation.
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load_addr_mask = 0x0
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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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