dev-arm: Implement a SMMUv3 model

This is an implementation of the SMMUv3 architecture.

What can it do?
- Single-stage and nested translation with 4k or 64k granule.  16k would
  be straightforward to add.
- Large pages are supported.
- Works with any gem5 device as long as it is issuing packets with a
  valid (Sub)StreamId

What it can't do?
- Fragment stage 1 page when the underlying stage 2 page is smaller.  S1
  page size > S2 page size is not supported
- Invalidations take zero time. This wouldn't be hard to fix.
- Checkpointing is not supported
- Stall/resume for faulting transactions is not supported

Additional contributors:
- Michiel W. van Tol <Michiel.VanTol@arm.com>
- Giacomo Travaglini <giacomo.travaglini@arm.com>

Change-Id: Ibc606fccd9199b2c1ba739c6335c846ffaa4d564
Signed-off-by: Giacomo Travaglini <giacomo.travaglini@arm.com>
Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com>
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/19008
Maintainer: Andreas Sandberg <andreas.sandberg@arm.com>
Tested-by: kokoro <noreply+kokoro@google.com>

src/dev/arm/SConscript

@@ -44,6 +44,7 @@ if env['TARGET_ISA'] == 'arm':
     SimObject('FlashDevice.py')
     SimObject('Gic.py')
     SimObject('RealView.py')
+    SimObject('SMMUv3.py')
     SimObject('UFSHostDevice.py')
     SimObject('EnergyCtrl.py')
     SimObject('NoMali.py')
@@ -66,6 +67,15 @@ if env['TARGET_ISA'] == 'arm':
     Source('pl111.cc')
     Source('hdlcd.cc')
     Source('kmi.cc')
+    Source('smmu_v3.cc');
+    Source('smmu_v3_caches.cc');
+    Source('smmu_v3_cmdexec.cc');
+    Source('smmu_v3_events.cc');
+    Source('smmu_v3_ports.cc');
+    Source('smmu_v3_proc.cc');
+    Source('smmu_v3_ptops.cc');
+    Source('smmu_v3_slaveifc.cc');
+    Source('smmu_v3_transl.cc');
     Source('timer_sp804.cc')
     Source('gpu_nomali.cc')
     Source('pci_host.cc')
@@ -88,6 +98,8 @@ if env['TARGET_ISA'] == 'arm':
     DebugFlag('GIC')
     DebugFlag('ITS')
     DebugFlag('RVCTRL')
+    DebugFlag('SMMUv3')
+    DebugFlag('SMMUv3Hazard')
     DebugFlag('EnergyCtrl')
     DebugFlag('UFSHostDevice')
     DebugFlag('VGIC')