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| author | Nikos Nikoleris <nikos.nikoleris@arm.com> | 2017-12-19 21:49:08 +0000 |
|---|---|---|
| committer | Nikos Nikoleris <nikos.nikoleris@arm.com> | 2018-02-07 16:14:39 +0000 |
| commit | c364f58da916a6a1cb66c3e0276e898d77e1021b (patch) | |
| tree | acb02a2876489805fa17db918f20ef5693f62b0a /src/arch/arm | |
| parent | 4d9811cc5fd36a972e340ad82b14ab0ccaeb5cfa (diff) | |
| download | gem5-c364f58da916a6a1cb66c3e0276e898d77e1021b.tar.xz | |
arch-arm: Turn dc ivac to dc civac when some conditions are met
The Arm ARM defines that at EL1 a data cache invalidate instruction
performs a data cache clean and invalidate operation if all of the
following apply:
* EL2 is implemented,
* HCR_EL2.VM is set to 1,
* SCR_EL3.NS is set to 1 or EL3 is not implemented.
This changeset implements this behavior.
Change-Id: I6b6aef2f4b1e7eb107c069fdb0a10f4aa8e6b196
Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com>
Reviewed-on: https://gem5-review.googlesource.com/7826
Maintainer: Andreas Sandberg <andreas.sandberg@arm.com>
Diffstat (limited to 'src/arch/arm')
| -rw-r--r-- | src/arch/arm/isa/insts/data64.isa | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/src/arch/arm/isa/insts/data64.isa b/src/arch/arm/isa/insts/data64.isa index dd87bed62..af84f6566 100644 --- a/src/arch/arm/isa/insts/data64.isa +++ b/src/arch/arm/isa/insts/data64.isa @@ -1,6 +1,6 @@ // -*- mode:c++ -*- -// Copyright (c) 2011-2013, 2016-2017 ARM Limited +// Copyright (c) 2011-2013, 2016-2018 ARM Limited // All rights reserved // // The license below extends only to copyright in the software and shall @@ -524,6 +524,12 @@ let {{ Request::Flags memAccessFlags = Request::INVALIDATE | Request::DST_POC | ArmISA::TLB::MustBeOne; EA = XBase; + HCR hcr = Hcr64; + SCR scr = Scr64; + if (el == EL1 && ArmSystem::haveVirtualization(xc->tcBase()) && + hcr.vm && (scr.ns || !ArmSystem::haveSecurity(xc->tcBase()))) { + memAccessFlags = memAccessFlags | Request::CLEAN; + } System *sys = xc->tcBase()->getSystemPtr(); Addr op_size = sys->cacheLineSize(); EA &= ~(op_size - 1); |