fastmodel: Add VExpressFastmodel platform

A VExpress based platform with FastModelGIC as interrupt controller.

Change-Id: I5ef6d04573d271225d7b39c110e93350a290c371
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/21359
Reviewed-by: Giacomo Travaglini <giacomo.travaglini@arm.com>
Maintainer: Giacomo Travaglini <giacomo.travaglini@arm.com>
Tested-by: kokoro <noreply+kokoro@google.com>

src/dev/arm/SConscript

@@ -50,6 +50,8 @@ if env['TARGET_ISA'] == 'arm':
     SimObject('EnergyCtrl.py')
     SimObject('NoMali.py')
     SimObject('VirtIOMMIO.py')
+    if env['USE_ARM_FASTMODEL']:
+	SimObject('VExpressFastmodel.py')
 
     Source('a9scu.cc')
     Source('amba_device.cc')

src/dev/arm/VExpressFastmodel.py

@@ -0,0 +1,54 @@
+# Copyright 2019 Google, Inc.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met: redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer;
+# redistributions in binary form must reproduce the above copyright
+# notice, this list of conditions and the following disclaimer in the
+# documentation and/or other materials provided with the distribution;
+# neither the name of the copyright holders nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# 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: Chun-Chen TK Hsu
+
+from m5.objects.FastModelGIC import FastModelGIC, SCFastModelGIC
+from m5.objects.RealView import VExpress_GEM5_Base, HDLcd
+
+class VExpressFastmodel(VExpress_GEM5_Base):
+    gic = FastModelGIC(
+        sc_gic=SCFastModelGIC(
+            reg_base=0x2c000000,
+            reg_base_per_redistributor="0.0.0.0=0x2c010000",
+            spi_count=988,
+        ))
+
+    hdlcd = HDLcd(
+        pxl_clk=VExpress_GEM5_Base.dcc.osc_pxl, pio_addr=0x2b000000, int_num=95)
+
+    def __init__(self, *args, **kwargs):
+        super(VExpressFastmodel, self).__init__(*args, **kwargs)
+
+    def _on_chip_devices(self):
+        devices = super(VExpressFastmodel, self)._on_chip_devices()
+        devices += [ self.gic, self.hdlcd ]
+        devices.remove(self.generic_timer)
+        return devices
+
+    def setupBootLoader(self, cur_sys, loc):
+        super(VExpressFastmodel,self).setupBootLoader(cur_sys, loc)
+        # Override the boot_loader setting
+        cur_sys.boot_loader = [ loc('boot_emm_v2.arm64') ]