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>
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
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