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ArmISA.py
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ArmISA.py
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# Copyright (c) 2012-2013, 2015-2021 ARM Limited
# All rights reserved.
#
# The license below extends only to copyright in the software and shall
# not be construed as granting a license to any other intellectual
# property including but not limited to intellectual property relating
# to a hardware implementation of the functionality of the software
# licensed hereunder. You may use the software subject to the license
# terms below provided that you ensure that this notice is replicated
# unmodified and in its entirety in all distributions of the software,
# modified or unmodified, in source code or in binary form.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are
# met: redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer;
# 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;
# neither the name of the copyright holders 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
# OWNER 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.params import *
from m5.proxy import *
from m5.SimObject import SimObject
from m5.objects.ArmPMU import ArmPMU
from m5.objects.ArmSystem import SveVectorLength
from m5.objects.BaseISA import BaseISA
from m5.objects.ISACommon import VecRegRenameMode
# Enum for DecoderFlavor
class DecoderFlavor(Enum): vals = ['Generic']
class ArmISA(BaseISA):
type = 'ArmISA'
cxx_class = 'gem5::ArmISA::ISA'
cxx_header = "arch/arm/isa.hh"
system = Param.System(Parent.any, "System this ISA object belongs to")
pmu = Param.ArmPMU(NULL, "Performance Monitoring Unit")
decoderFlavor = Param.DecoderFlavor(
'Generic', "Decoder flavor specification")
# If no MIDR value is provided, 0x0 is treated by gem5 as follows:
# When 'highest_el_is_64' (AArch64 support) is:
# True -> Cortex-A57 TRM r0p0 MIDR is used
# False -> Cortex-A15 TRM r0p0 MIDR is used
midr = Param.UInt32(0x0, "MIDR value")
# See section B4.1.89 - B4.1.92 of the ARM ARM
# VMSAv7 support
id_mmfr0 = Param.UInt32(0x10201103, "Memory Model Feature Register 0")
id_mmfr1 = Param.UInt32(0x00000000, "Memory Model Feature Register 1")
# no HW access | WFI stalling | ISB and DSB |
# all TLB maintenance | no Harvard
id_mmfr2 = Param.UInt32(0x01230000, "Memory Model Feature Register 2")
# SuperSec | Coherent TLB | Bcast Maint |
# BP Maint | Cache Maint Set/way | Cache Maint MVA
id_mmfr3 = Param.UInt32(0x02102211, "Memory Model Feature Register 3")
id_mmfr4 = Param.UInt32(0x00000000, "Memory Model Feature Register 4")
# See section B4.1.84 of ARM ARM
# All values are latest for ARMv7-A profile
id_isar0 = Param.UInt32(0x02101111, "Instruction Set Attribute Register 0")
id_isar1 = Param.UInt32(0x02112111, "Instruction Set Attribute Register 1")
id_isar2 = Param.UInt32(0x21232141, "Instruction Set Attribute Register 2")
id_isar3 = Param.UInt32(0x01112131, "Instruction Set Attribute Register 3")
id_isar4 = Param.UInt32(0x10010142, "Instruction Set Attribute Register 4")
id_isar5 = Param.UInt32(0x11000000, "Instruction Set Attribute Register 5")
# !I8MM | !BF16 | SPECRES = 0 | !SB | !FHM | DP | JSCVT
id_isar6 = Param.UInt32(0x00000001, "Instruction Set Attribute Register 6")
fpsid = Param.UInt32(0x410430a0, "Floating-point System ID Register")
# [31:0] is implementation defined
id_aa64afr0_el1 = Param.UInt64(0x0000000000000000,
"AArch64 Auxiliary Feature Register 0")
# Reserved for future expansion
id_aa64afr1_el1 = Param.UInt64(0x0000000000000000,
"AArch64 Auxiliary Feature Register 1")
# 1 CTX CMPs | 16 WRPs | 16 BRPs | !PMU | !Trace | Debug v8-A
id_aa64dfr0_el1 = Param.UInt64(0x0000000000F0F006,
"AArch64 Debug Feature Register 0")
# Reserved for future expansion
id_aa64dfr1_el1 = Param.UInt64(0x0000000000000000,
"AArch64 Debug Feature Register 1")
# !FHM | !TME | !Atomic | !CRC32 | !SHA2 | RDM | !SHA1 | !AES
id_aa64isar0_el1 = Param.UInt64(0x0000000010000000,
"AArch64 Instruction Set Attribute Register 0")
# !I8MM | !BF16 | SPECRES = 0 | !SB |
# GPI = 0x0 | GPA = 0x1 | API=0x0 | FCMA | JSCVT | APA=0x1
id_aa64isar1_el1 = Param.UInt64(0x0000000001011010,
"AArch64 Instruction Set Attribute Register 1")
# 4K | 64K | !16K | !BigEndEL0 | !SNSMem | !BigEnd | 8b ASID | 40b PA
id_aa64mmfr0_el1 = Param.UInt64(0x0000000000f00002,
"AArch64 Memory Model Feature Register 0")
# PAN | HPDS | !VHE | VMIDBits
id_aa64mmfr1_el1 = Param.UInt64(0x0000000000101020,
"AArch64 Memory Model Feature Register 1")
# |VARANGE
id_aa64mmfr2_el1 = Param.UInt64(0x0000000000010000,
"AArch64 Memory Model Feature Register 2")
# Any access (read/write) to an unimplemented
# Implementation Defined registers is not causing an Undefined Instruction.
# It is rather executed as a NOP.
impdef_nop = Param.Bool(False,
"Any access to a MISCREG_IMPDEF_UNIMPL register is executed as NOP")
# This is required because in SE mode a generic System SimObject is
# allocated, instead of an ArmSystem
sve_vl_se = Param.SveVectorLength(1,
"SVE vector length in quadwords (128-bit), SE-mode only")
# Recurse into subnodes to generate DTB entries. This is mainly needed to
# generate the PMU entry.
generateDeviceTree = SimObject.recurseDeviceTree