Giacomo Travaglini has submitted this change and it was merged. (
https://gem5-review.googlesource.com/c/public/gem5/+/16748 )
Change subject: dev-arm: Set/Unset dma coherent mode from python
......................................................................
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 <[email protected]>
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/16748
Reviewed-by: Andreas Sandberg <[email protected]>
Maintainer: Andreas Sandberg <[email protected]>
---
M src/dev/arm/RealView.py
1 file changed, 6 insertions(+), 1 deletion(-)
Approvals:
Andreas Sandberg: Looks good to me, approved; Looks good to me, approved
diff --git a/src/dev/arm/RealView.py b/src/dev/arm/RealView.py
index af19f3b..35bc862 100644
--- a/src/dev/arm/RealView.py
+++ b/src/dev/arm/RealView.py
@@ -121,6 +121,10 @@
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 @@
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
--
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Gerrit-Project: public/gem5
Gerrit-Branch: master
Gerrit-Change-Id: I1759fced74e42410462637ca77997a351314a90a
Gerrit-Change-Number: 16748
Gerrit-PatchSet: 5
Gerrit-Owner: Giacomo Travaglini <[email protected]>
Gerrit-Assignee: Gabe Black <[email protected]>
Gerrit-Reviewer: Andreas Sandberg <[email protected]>
Gerrit-Reviewer: Ciro Santilli <[email protected]>
Gerrit-Reviewer: Gabe Black <[email protected]>
Gerrit-Reviewer: Giacomo Travaglini <[email protected]>
Gerrit-Reviewer: Jason Lowe-Power <[email protected]>
Gerrit-MessageType: merged
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