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arm, config: Add initial support for Ruby

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Add initial support for creating an ARM system with a Ruby-based
memory system. This support is currently experimental and limited to
the new VExpress_GEM5_V1 platform.

Change-Id: I36baeb68b0d891e34ea46aafe17b5e55217b4bfa
Signed-off-by: Andreas Sandberg <andreas.sandberg@arm.com>
Reviewed-by: Nikos Nikoleris <nikos.nikoleris@arm.com>
Reviewed-by: Jason Lowe-Power <jason@lowepower.com>
Reviewed-by: Brad Beckmann <brad.beckmann@amd.com>
This commit is contained in:
Andreas Sandberg 2016-08-10 16:26:34 +01:00
parent f540f1a230
commit eb87ed8e74
2 changed files with 29 additions and 15 deletions
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30
configs/common/FSConfig.py
View file

@ -1,4 +1,4 @@
# Copyright (c) 2010-2012, 2015 ARM Limited
# Copyright (c) 2010-2012, 2015-2016 ARM Limited
# All rights reserved.
#
# The license below extends only to copyright in the software and shall
@ -203,7 +203,7 @@ def makeSparcSystem(mem_mode, mdesc=None, cmdline=None):
def makeArmSystem(mem_mode, machine_type, num_cpus=1, mdesc=None,
dtb_filename=None, bare_metal=False, cmdline=None,
external_memory=""):
external_memory="", ruby=False):
assert machine_type
default_dtbs = {
@ -233,10 +233,11 @@ def makeArmSystem(mem_mode, machine_type, num_cpus=1, mdesc=None,
self.readfile = mdesc.script()
self.iobus = IOXBar()
self.membus = MemBus()
self.membus.badaddr_responder.warn_access = "warn"
if not ruby:
self.bridge = Bridge(delay='50ns')
self.bridge.master = self.iobus.slave
self.membus = MemBus()
self.membus.badaddr_responder.warn_access = "warn"
self.bridge.slave = self.membus.master
self.mem_mode = mem_mode
@ -318,7 +319,7 @@ def makeArmSystem(mem_mode, machine_type, num_cpus=1, mdesc=None,
# iobus, as gem5's membus is only used for initialization and
# SST doesn't use it. Attaching nvmem to iobus solves this issue.
# During initialization, system_port -> membus -> iobus -> nvmem.
if external_memory:
if external_memory or ruby:
self.realview.setupBootLoader(self.iobus, self, binary)
else:
self.realview.setupBootLoader(self.membus, self, binary)
@ -366,19 +367,30 @@ def makeArmSystem(mem_mode, machine_type, num_cpus=1, mdesc=None,
self.bridge.ranges = [self.realview.nvmem.range]
self.realview.attachOnChipIO(self.iobus)
else:
self.realview.attachOnChipIO(self.membus, self.bridge)
# Attach off-chip devices
self.realview.attachIO(self.iobus)
elif ruby:
self._dma_ports = [ ]
self.realview.attachOnChipIO(self.iobus, dma_ports=self._dma_ports)
# Force Ruby to treat the boot ROM as an IO device.
self.realview.nvmem.in_addr_map = False
self.realview.attachIO(self.iobus, dma_ports=self._dma_ports)
else:
self.realview.attachOnChipIO(self.membus, self.bridge)
# Attach off-chip devices
self.realview.attachIO(self.iobus)
for dev_id, dev in enumerate(pci_devices):
dev.pci_bus, dev.pci_dev, dev.pci_func = (0, dev_id + 1, 0)
self.realview.attachPciDevice(dev, self.iobus)
self.realview.attachPciDevice(
dev, self.iobus,
dma_ports=self._dma_ports if ruby else None)
self.intrctrl = IntrControl()
self.terminal = Terminal()
self.vncserver = VncServer()
if not ruby:
self.system_port = self.membus.slave
return self

8
configs/example/fs.py
View file

@ -1,4 +1,4 @@
# Copyright (c) 2010-2013 ARM Limited
# Copyright (c) 2010-2013, 2016 ARM Limited
# All rights reserved.
#
# The license below extends only to copyright in the software and shall
@ -99,7 +99,8 @@ def build_test_system(np):
options.num_cpus, bm[0], options.dtb_filename,
bare_metal=options.bare_metal,
cmdline=cmdline,
external_memory=options.external_memory_system)
external_memory=options.external_memory_system,
ruby=options.ruby)
if options.enable_context_switch_stats_dump:
test_sys.enable_context_switch_stats_dump = True
else:
@ -172,10 +173,11 @@ def build_test_system(np):
cpu.icache_port = test_sys.ruby._cpu_ports[i].slave
cpu.dcache_port = test_sys.ruby._cpu_ports[i].slave
if buildEnv['TARGET_ISA'] == "x86":
if buildEnv['TARGET_ISA'] in ("x86", "arm"):
cpu.itb.walker.port = test_sys.ruby._cpu_ports[i].slave
cpu.dtb.walker.port = test_sys.ruby._cpu_ports[i].slave
if buildEnv['TARGET_ISA'] in "x86":
cpu.interrupts[0].pio = test_sys.ruby._cpu_ports[i].master
cpu.interrupts[0].int_master = test_sys.ruby._cpu_ports[i].slave
cpu.interrupts[0].int_slave = test_sys.ruby._cpu_ports[i].master