ArmSystem.py revision 12272:bcc67ee98e6d 
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36# Authors: Ali Saidi
37
38from m5.params import *
39from m5.SimObject import *
40
41from System import System
42
43class ArmMachineType(Enum):
44    map = {
45        'RealViewEB' : 827,
46        'RealViewPBX' : 1901,
47        'VExpress_EMM' : 2272,
48        'VExpress_EMM64' : 2272,
49        'DTOnly' : -1,
50    }
51
52class ArmSystem(System):
53    type = 'ArmSystem'
54    cxx_header = "arch/arm/system.hh"
55    multi_proc = Param.Bool(True, "Multiprocessor system?")
56    boot_loader = VectorParam.String([],
57        "File that contains the boot loader code. Zero or more files may be "
58        "specified. The first boot loader that matches the kernel's "
59        "architecture will be used.")
60    gic_cpu_addr = Param.Addr(0, "Addres of the GIC CPU interface")
61    flags_addr = Param.Addr(0, "Address of the flags register for MP booting")
62    have_security = Param.Bool(False,
63        "True if Security Extensions are implemented")
64    have_virtualization = Param.Bool(False,
65        "True if Virtualization Extensions are implemented")
66    have_lpae = Param.Bool(True, "True if LPAE is implemented")
67    highest_el_is_64 = Param.Bool(False,
68        "True if the register width of the highest implemented exception level "
69        "is 64 bits (ARMv8)")
70    reset_addr_64 = Param.Addr(0x0,
71        "Reset address if the highest implemented exception level is 64 bits "
72        "(ARMv8)")
73    phys_addr_range_64 = Param.UInt8(40,
74        "Supported physical address range in bits when using AArch64 (ARMv8)")
75    have_large_asid_64 = Param.Bool(False,
76        "True if ASID is 16 bits in AArch64 (ARMv8)")
77
78    m5ops_base = Param.Addr(0,
79        "Base of the 64KiB PA range used for memory-mapped m5ops. Set to 0 "
80        "to disable.")
81
82class GenericArmSystem(ArmSystem):
83    type = 'GenericArmSystem'
84    cxx_header = "arch/arm/system.hh"
85    machine_type = Param.ArmMachineType('DTOnly',
86        "Machine id from http://www.arm.linux.org.uk/developer/machines/")
87    atags_addr = Param.Addr("Address where default atags structure should " \
88                                "be written")
89    dtb_filename = Param.String("",
90        "File that contains the Device Tree Blob. Don't use DTB if empty.")
91    early_kernel_symbols = Param.Bool(False,
92        "enable early kernel symbol tables before MMU")
93    enable_context_switch_stats_dump = Param.Bool(False, "enable stats/task info dumping at context switch boundaries")
94
95    panic_on_panic = Param.Bool(False, "Trigger a gem5 panic if the " \
96                                    "guest kernel panics")
97    panic_on_oops = Param.Bool(False, "Trigger a gem5 panic if the " \
98                                   "guest kernel oopses")
99
100class LinuxArmSystem(GenericArmSystem):
101    type = 'LinuxArmSystem'
102    cxx_header = "arch/arm/linux/system.hh"
103
104    @cxxMethod
105    def dumpDmesg(self):
106        """Dump dmesg from the simulated kernel to standard out"""
107        pass
108
109    # Have Linux systems for ARM auto-calc their load_addr_mask for proper
110    # kernel relocation.
111    load_addr_mask = 0x0
112
113class FreebsdArmSystem(GenericArmSystem):
114    type = 'FreebsdArmSystem'
115    cxx_header = "arch/arm/freebsd/system.hh"
116