diff options
| -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 |