configs: Add an example workloads module

This will be a collection of Workload types.
At the moment we provide the following:

* ArmBaremetal: modelling a simple baremetal workload
* ArmTrustedFirmware: modelling the arm trusted firmware workload

Change-Id: Ib46286c03a1c952f981b172c1ea6aa4a6668757e
Signed-off-by: Giacomo Travaglini <giacomo.travaglini@arm.com>
Reviewed-by: Ciro Santilli <ciro.santilli@arm.com>
Reviewed-by: Nikos Nikoleris <nikos.nikoleris@arm.com>
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/27969
Tested-by: kokoro <noreply+kokoro@google.com>

configs/example/arm/workloads.py

@@ -0,0 +1,85 @@
+# Copyright (c) 2020 ARM Limited
+# All rights reserved.
+#
+# The license below extends only to copyright in the software and shall
+# not be construed as granting a license to any other intellectual
+# property including but not limited to intellectual property relating
+# to a hardware implementation of the functionality of the software
+# licensed hereunder.  You may use the software subject to the license
+# terms below provided that you ensure that this notice is replicated
+# unmodified and in its entirety in all distributions of the software,
+# modified or unmodified, in source code or in binary form.
+#
+# 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.
+#
+
+from __future__ import print_function
+from __future__ import absolute_import
+
+import m5
+from m5.objects import *
+from m5.options import *
+
+from common.SysPaths import binary, disk
+
+class ArmBaremetal(ArmFsWorkload):
+    """ Baremetal workload """
+    atags_addr = 0
+
+    def __init__(self, obj, system, **kwargs):
+        super(ArmBaremetal, self).__init__(**kwargs)
+
+        self.object_file = obj
+
+class ArmTrustedFirmware(ArmFsWorkload):
+    """
+    Arm Trusted Firmware (TFA) workload.
+
+    It models the firmware design described at:
+
+    https://trustedfirmware-a.readthedocs.io/en/latest/design/firmware-design.html
+
+    The Workload is expecting to find a set of firmare images under
+    the M5_PATH/binaries path. Those images are:
+        * bl1.bin (BL1 = Stage 1 Bootloader)
+        * fip.bin (FIP = Firmware Image Package):
+            BL2, BL31, BL33 binaries compiled under a singe package
+
+    These are the results of the compilation of Arm Trusted Firmware.
+    https://github.com/ARM-software/arm-trusted-firmware
+
+    """
+    atags_addr = 0
+
+    def __init__(self, obj, system, **kwargs):
+        super(ArmTrustedFirmware, self).__init__(**kwargs)
+
+        self.extras = [ binary('bl1.bin'), binary('fip.bin'), ]
+        self.extras_addrs = [
+            system.realview.bootmem.range.start,
+            system.realview.flash0.range.start
+        ]
+
+        # Arm Trusted Firmware will provide a PSCI implementation
+        system._have_psci = True