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| author | Giacomo Travaglini <giacomo.travaglini@arm.com> | 2019-02-25 17:05:09 +0000 |
|---|---|---|
| committer | Giacomo Travaglini <giacomo.travaglini@arm.com> | 2019-03-26 12:53:44 +0000 |
| commit | 61f0e7e2676a54579cf104a385e0f6fa97266e4b (patch) | |
| tree | 2a2ff4532756ac45b338f08933806017e439c18d /src/dev/arm | |
| parent | ca4c0a168ae3a48fe97f0c132fefbf606d925bb8 (diff) | |
| download | gem5-61f0e7e2676a54579cf104a385e0f6fa97266e4b.tar.xz | |
dev-arm: Set/Unset dma coherent mode from python
With this patch it will be possible to automatically enable/disable the
dma-coherent property for the GenericArmPciHost autogenerated DTB. This
has been done by adding the _dma_coherent param.
Change-Id: I1759fced74e42410462637ca77997a351314a90a
Signed-off-by: Giacomo Travaglini <giacomo.travaglini@arm.com>
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/16748
Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com>
Maintainer: Andreas Sandberg <andreas.sandberg@arm.com>
Diffstat (limited to 'src/dev/arm')
| -rw-r--r-- | src/dev/arm/RealView.py | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/src/dev/arm/RealView.py b/src/dev/arm/RealView.py index af19f3bbd..35bc86227 100644 --- a/src/dev/arm/RealView.py +++ b/src/dev/arm/RealView.py @@ -121,6 +121,10 @@ class GenericArmPciHost(GenericPciHost): int_base = Param.Unsigned("PCI interrupt base") int_count = Param.Unsigned("Maximum number of interrupts used by this host") + # This python parameter can be used in configuration scripts to turn + # on/off the fdt dma-coherent flag when doing dtb autogeneration + _dma_coherent = True + def generateDeviceTree(self, state): local_state = FdtState(addr_cells=3, size_cells=2, cpu_cells=1) intterrupt_cells = 1 @@ -182,7 +186,8 @@ class GenericArmPciHost(GenericPciHost): m5.fatal("Unsupported PCI interrupt policy " + "for Device Tree generation") - node.append(FdtProperty("dma-coherent")) + if self._dma_coherent: + node.append(FdtProperty("dma-coherent")) yield node |