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# Authors: Ali Saidi

from m5.params import *

from System import System

class ArmMachineType(Enum):
    map = {'RealView_EB' : 827,
           'RealView_PBX' : 1901,
           'VExpress_ELT' : 2272,
           'VExpress_CA9' : 2272,
           'VExpress_EMM' : 2272}

class ArmSystem(System):
    type = 'ArmSystem'
    load_addr_mask = 0xffffffff
    # 0x35 Implementor is '5' from "M5"
    # 0x0 Variant
    # 0xf Architecture from CPUID scheme
    # 0xc00 Primary part number ("c" or higher implies ARM v7)
    # 0x0 Revision
    midr_regval = Param.UInt32(0x350fc000, "MIDR value")
    multi_proc = Param.Bool(True, "Multiprocessor system?")
    boot_loader = Param.String("", "File that contains the boot loader code if any")
    gic_cpu_addr = Param.Addr(0, "Addres of the GIC CPU interface")
    flags_addr = Param.Addr(0, "Address of the flags register for MP booting")

class LinuxArmSystem(ArmSystem):
    type = 'LinuxArmSystem'
    load_addr_mask = 0x0fffffff
    machine_type = Param.ArmMachineType('RealView_PBX',
        "Machine id from http://www.arm.linux.org.uk/developer/machines/")
    atags_addr = Param.Addr(0x100, "Address where default atags structure should be written")
    early_kernel_symbols = Param.Bool(False, "enable early kernel symbol tables before MMU")
