Re: [Linaro-uefi] [RFC] Add new interfaces to allocate memory with limited address in UncachedAllocationLib

On 24 September 2015 at 11:39, Heyi Guo heyi.guo@linaro.org wrote:

Hi folks,

How about adding new interfaces to allocate memory with limited address in UncachedAllocationLib, something like AllocateMaxAddress of EFI_ALLOCATE_TYPE?

The background is that we may still have legacy devices on ARM64 which requires 32bit memory for DMA transaction.

Yes, that sounds sensible. But it should be part of a series that introduces a device that actually needs it. Otherwise, we add code in the tree that is not used (and not tested), which I think is something we should avoid.