On 2/24/22 06:29, Tomas Pilar (tpilar) wrote:
+//
+// Enable 64-bit DMA support in the PCI layer.
+//
+Status = PciIo->Attributes (
+ PciIo,
+ EfiPciIoAttributeOperationEnable,
+ EFI_PCI_IO_ATTRIBUTE_DUAL_ADDRESS_CYCLE
(+ Hao Wu)
On Thu, 24 Feb 2022 at 14:29, Tomas Pilar (tpilar)
wrote:
>
> Move the logic that stores starting PCI attributes and sets the
> EFI_PCI_IO_ATTRIBUTE_DUAL_ADDRESS_CYCLE attribute to
> DriverBindingStart() before the memory that backs the
> DMA engine is allocated.
>
> This ensures that
Move the logic that stores starting PCI attributes and sets the
EFI_PCI_IO_ATTRIBUTE_DUAL_ADDRESS_CYCLE attribute to
DriverBindingStart() before the memory that backs the
DMA engine is allocated.
This ensures that the DMA-backing memory is not forcibly allocated
below 4G in system address map. Oth
