# Copyright (c) 2012-2013, 2015 ARM Limited
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#
# The license below extends only to copyright in the software and shall
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# 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
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# met: redistributions of source code must retain the above copyright
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# this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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# 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
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# Authors: Andreas Sandberg
#          Giacomo Gabrielli

from m5.params import *
from m5.proxy import *
from m5.SimObject import SimObject

from ArmPMU import ArmPMU

# Enum for DecoderFlavour
class DecoderFlavour(Enum): vals = ['Generic']

class ArmISA(SimObject):
    type = 'ArmISA'
    cxx_class = '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")
    decoderFlavour = Param.DecoderFlavour('Generic', "Decoder flavour specification")

    midr = Param.UInt32(0x410fc0f0, "MIDR value")

    # See section B4.1.93 - B4.1.94 of the ARM ARM
    #
    # !ThumbEE | !Jazelle | Thumb | ARM
    # Note: ThumbEE is disabled for now since we don't support CP14
    # config registers and jumping to ThumbEE vectors
    id_pfr0 = Param.UInt32(0x00000031, "Processor Feature Register 0")
    # !Timer | Virti | !M Profile | TrustZone | ARMv4
    id_pfr1 = Param.UInt32(0x00001011, "Processor Feature Register 1")

    # 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")

    # 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(0x00000000, "Instruction Set Attribute Register 5")

    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 | 2 WRPs | 2 BRPs | !PMU | !Trace | Debug v8-A
    id_aa64dfr0_el1 = Param.UInt64(0x0000000000101006,
        "AArch64 Debug Feature Register 0")
    # Reserved for future expansion
    id_aa64dfr1_el1 = Param.UInt64(0x0000000000000000,
        "AArch64 Debug Feature Register 1")

    # !CRC32 | !SHA2 | !SHA1 | !AES
    id_aa64isar0_el1 = Param.UInt64(0x0000000000000000,
        "AArch64 Instruction Set Attribute Register 0")
    # Reserved for future expansion
    id_aa64isar1_el1 = Param.UInt64(0x0000000000000000,
        "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")
    # Reserved for future expansion
    id_aa64mmfr1_el1 = Param.UInt64(0x0000000000000000,
        "AArch64 Memory Model Feature Register 1")

    # !GICv3 CP15 | AdvSIMD | FP | !EL3 | !EL2 | EL1 (AArch64) | EL0 (AArch64)
    # (no AArch32/64 interprocessing support for now)
    id_aa64pfr0_el1 = Param.UInt64(0x0000000000000011,
        "AArch64 Processor Feature Register 0")
    # Reserved for future expansion
    id_aa64pfr1_el1 = Param.UInt64(0x0000000000000000,
        "AArch64 Processor Feature Register 1")
