-# Copyright (c) 2009, 2012-2013 ARM Limited
+# Copyright (c) 2009, 2012-2013, 2015-2020 ARM Limited
# All rights reserved.
#
# The license below extends only to copyright in the software and shall
# 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.
-#
-# Authors: Ali Saidi
from m5.params import *
+from m5.options import *
+from m5.SimObject import *
+from m5.util.fdthelper import *
-from System import System
+from m5.objects.System import System
+from m5.objects.ArmSemihosting import ArmSemihosting
-class ArmMachineType(Enum):
- map = {'RealView_EB' : 827,
- 'RealView_PBX' : 1901,
- 'VExpress_EMM' : 2272,
- 'VExpress_EMM64' : 2272}
+class SveVectorLength(UInt8): min = 1; max = 16
class ArmSystem(System):
type = 'ArmSystem'
cxx_header = "arch/arm/system.hh"
- load_addr_mask = 0xffffffff
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")
have_security = Param.Bool(False,
"True if Security Extensions are implemented")
have_virtualization = Param.Bool(False,
"True if Virtualization Extensions are implemented")
- have_lpae = Param.Bool(False, "True if LPAE is implemented")
- have_generic_timer = Param.Bool(False,
- "True if the Generic Timer extension is implemented")
+ have_crypto = Param.Bool(False,
+ "True if Crypto Extensions is implemented")
+ have_lpae = Param.Bool(True, "True if LPAE is implemented")
+ reset_addr = Param.Addr(0x0,
+ "Reset address (ARMv8)")
+ auto_reset_addr = Param.Bool(True,
+ "Determine reset address from kernel entry point if no boot loader")
highest_el_is_64 = Param.Bool(False,
"True if the register width of the highest implemented exception level "
"is 64 bits (ARMv8)")
- reset_addr_64 = Param.Addr(0x0,
- "Reset address if the highest implemented exception level is 64 bits "
- "(ARMv8)")
phys_addr_range_64 = Param.UInt8(40,
"Supported physical address range in bits when using AArch64 (ARMv8)")
have_large_asid_64 = Param.Bool(False,
"True if ASID is 16 bits in AArch64 (ARMv8)")
+ have_sve = Param.Bool(True,
+ "True if SVE is implemented (ARMv8)")
+ sve_vl = Param.SveVectorLength(1,
+ "SVE vector length in quadwords (128-bit)")
+ have_lse = Param.Bool(True,
+ "True if LSE is implemented (ARMv8.1)")
+ have_pan = Param.Bool(True,
+ "True if Priviledge Access Never is implemented (ARMv8.1)")
+
+ semihosting = Param.ArmSemihosting(NULL,
+ "Enable support for the Arm semihosting by settings this parameter")
+
+ # Set to true if simulation provides a PSCI implementation
+ # This flag will be checked when auto-generating
+ # a PSCI node. A client (e.g Linux) would then be able to
+ # know if it can use the PSCI APIs
+ _have_psci = False
+
+ def generateDtb(self, filename):
+ """
+ Autogenerate DTB. Arguments are the folder where the DTB
+ will be stored, and the name of the DTB file.
+ """
+ state = FdtState(addr_cells=2, size_cells=2, cpu_cells=1)
+ rootNode = self.generateDeviceTree(state)
+
+ fdt = Fdt()
+ fdt.add_rootnode(rootNode)
+ fdt.writeDtbFile(filename)
+
+
+ def generateDeviceTree(self, state):
+ # Generate a device tree root node for the system by creating the root
+ # node and adding the generated subnodes of all children.
+ # When a child needs to add multiple nodes, this is done by also
+ # creating a node called '/' which will then be merged with the
+ # root instead of appended.
+
+ def generateMemNode(mem_range):
+ node = FdtNode("memory@%x" % long(mem_range.start))
+ node.append(FdtPropertyStrings("device_type", ["memory"]))
+ node.append(FdtPropertyWords("reg",
+ state.addrCells(mem_range.start) +
+ state.sizeCells(mem_range.size()) ))
+ return node
+
+ root = FdtNode('/')
+ root.append(state.addrCellsProperty())
+ root.append(state.sizeCellsProperty())
+
+ # Add memory nodes
+ for mem_range in self.mem_ranges:
+ root.append(generateMemNode(mem_range))
-class LinuxArmSystem(ArmSystem):
- type = 'LinuxArmSystem'
- cxx_header = "arch/arm/linux/system.hh"
- load_addr_mask = 0x0fffffff
- machine_type = Param.ArmMachineType('VExpress_EMM',
- "Machine id from http://www.arm.linux.org.uk/developer/machines/")
- atags_addr = Param.Addr("Address where default atags structure should " \
- "be written")
- boot_release_addr = Param.Addr(0xfff8, "Address where secondary CPUs " \
- "spin waiting boot in the loader")
- dtb_filename = Param.String("",
- "File that contains the Device Tree Blob. Don't use DTB if empty.")
- early_kernel_symbols = Param.Bool(False,
- "enable early kernel symbol tables before MMU")
- enable_context_switch_stats_dump = Param.Bool(False, "enable stats/task info dumping at context switch boundaries")
+ for node in self.recurseDeviceTree(state):
+ # Merge root nodes instead of adding them (for children
+ # that need to add multiple root level nodes)
+ if node.get_name() == root.get_name():
+ root.merge(node)
+ else:
+ root.append(node)
- panic_on_panic = Param.Bool(False, "Trigger a gem5 panic if the " \
- "guest kernel panics")
- panic_on_oops = Param.Bool(False, "Trigger a gem5 panic if the " \
- "guest kernel oopses")
+ return root
projects / gem5.git / blobdiff