ArmSystem.py revision 12471
1# Copyright (c) 2009, 2012-2013, 2015-2017 ARM Limited 2# All rights reserved. 3# 4# The license below extends only to copyright in the software and shall 5# not be construed as granting a license to any other intellectual 6# property including but not limited to intellectual property relating 7# to a hardware implementation of the functionality of the software 8# licensed hereunder. You may use the software subject to the license 9# terms below provided that you ensure that this notice is replicated 10# unmodified and in its entirety in all distributions of the software, 11# modified or unmodified, in source code or in binary form. 12# 13# Redistribution and use in source and binary forms, with or without 14# modification, are permitted provided that the following conditions are 15# met: redistributions of source code must retain the above copyright 16# notice, this list of conditions and the following disclaimer; 17# redistributions in binary form must reproduce the above copyright 18# notice, this list of conditions and the following disclaimer in the 19# documentation and/or other materials provided with the distribution; 20# neither the name of the copyright holders nor the names of its 21# contributors may be used to endorse or promote products derived from 22# this software without specific prior written permission. 23# 24# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 25# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 26# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 27# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 28# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 29# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 30# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 31# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 32# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 33# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 34# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 35# 36# Authors: Ali Saidi 37# Glenn Bergmans 38 39from m5.params import * 40from m5.SimObject import * 41from m5.util.fdthelper import * 42 43from System import System 44 45class ArmMachineType(Enum): 46 map = { 47 'RealViewEB' : 827, 48 'RealViewPBX' : 1901, 49 'VExpress_EMM' : 2272, 50 'VExpress_EMM64' : 2272, 51 'DTOnly' : -1, 52 } 53 54class ArmSystem(System): 55 type = 'ArmSystem' 56 cxx_header = "arch/arm/system.hh" 57 multi_proc = Param.Bool(True, "Multiprocessor system?") 58 boot_loader = VectorParam.String([], 59 "File that contains the boot loader code. Zero or more files may be " 60 "specified. The first boot loader that matches the kernel's " 61 "architecture will be used.") 62 gic_cpu_addr = Param.Addr(0, "Addres of the GIC CPU interface") 63 flags_addr = Param.Addr(0, "Address of the flags register for MP booting") 64 have_security = Param.Bool(False, 65 "True if Security Extensions are implemented") 66 have_virtualization = Param.Bool(False, 67 "True if Virtualization Extensions are implemented") 68 have_lpae = Param.Bool(True, "True if LPAE is implemented") 69 highest_el_is_64 = Param.Bool(False, 70 "True if the register width of the highest implemented exception level " 71 "is 64 bits (ARMv8)") 72 reset_addr_64 = Param.Addr(0x0, 73 "Reset address if the highest implemented exception level is 64 bits " 74 "(ARMv8)") 75 phys_addr_range_64 = Param.UInt8(40, 76 "Supported physical address range in bits when using AArch64 (ARMv8)") 77 have_large_asid_64 = Param.Bool(False, 78 "True if ASID is 16 bits in AArch64 (ARMv8)") 79 80 m5ops_base = Param.Addr(0, 81 "Base of the 64KiB PA range used for memory-mapped m5ops. Set to 0 " 82 "to disable.") 83 84 def generateDeviceTree(self, state): 85 # Generate a device tree root node for the system by creating the root 86 # node and adding the generated subnodes of all children. 87 # When a child needs to add multiple nodes, this is done by also 88 # creating a node called '/' which will then be merged with the 89 # root instead of appended. 90 91 def generateMemNode(mem_range): 92 node = FdtNode("memory@%x" % long(mem_range.start)) 93 node.append(FdtPropertyStrings("device_type", ["memory"])) 94 node.append(FdtPropertyWords("reg", 95 state.addrCells(mem_range.start) + 96 state.sizeCells(mem_range.size()) )) 97 return node 98 99 root = FdtNode('/') 100 root.append(state.addrCellsProperty()) 101 root.append(state.sizeCellsProperty()) 102 103 # Add memory nodes 104 for mem_range in self.mem_ranges: 105 root.append(generateMemNode(mem_range)) 106 107 for node in self.recurseDeviceTree(state): 108 # Merge root nodes instead of adding them (for children 109 # that need to add multiple root level nodes) 110 if node.get_name() == root.get_name(): 111 root.merge(node) 112 else: 113 root.append(node) 114 115 return root 116 117class GenericArmSystem(ArmSystem): 118 type = 'GenericArmSystem' 119 cxx_header = "arch/arm/system.hh" 120 machine_type = Param.ArmMachineType('DTOnly', 121 "Machine id from http://www.arm.linux.org.uk/developer/machines/") 122 atags_addr = Param.Addr("Address where default atags structure should " \ 123 "be written") 124 dtb_filename = Param.String("", 125 "File that contains the Device Tree Blob. Don't use DTB if empty.") 126 early_kernel_symbols = Param.Bool(False, 127 "enable early kernel symbol tables before MMU") 128 enable_context_switch_stats_dump = Param.Bool(False, "enable stats/task info dumping at context switch boundaries") 129 130 panic_on_panic = Param.Bool(False, "Trigger a gem5 panic if the " \ 131 "guest kernel panics") 132 panic_on_oops = Param.Bool(False, "Trigger a gem5 panic if the " \ 133 "guest kernel oopses") 134 135class LinuxArmSystem(GenericArmSystem): 136 type = 'LinuxArmSystem' 137 cxx_header = "arch/arm/linux/system.hh" 138 139 @cxxMethod 140 def dumpDmesg(self): 141 """Dump dmesg from the simulated kernel to standard out""" 142 pass 143 144 # Have Linux systems for ARM auto-calc their load_addr_mask for proper 145 # kernel relocation. 146 load_addr_mask = 0x0 147 148class FreebsdArmSystem(GenericArmSystem): 149 type = 'FreebsdArmSystem' 150 cxx_header = "arch/arm/freebsd/system.hh" 151