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EmbeddedPkg/NonCoherentDmaLib: implement support for DMA range limits

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Implement support for driving peripherals with limited DMA ranges to
NonCoherentDmaLib, by adding a device address limit, and taking it,
along with the device offset, into account when allocating or mapping
DMA buffers.

Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Tested-by: Pete Batard <pete@akeo.ie>
Acked-by: Philippe Mathieu-Daude <philmd@redhat.com>
Acked-by: Leif Lindholm <leif.lindholm@linaro.org>
This commit is contained in:
Ard Biesheuvel
2019-11-21 09:32:26 +01:00
committed by mergify[bot]
parent 9caaa79dd7
commit 62a75650e4
3 changed files with 160 additions and 12 deletions
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EmbeddedPkg/Library/NonCoherentDmaLib/NonCoherentDmaLib.inf
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@@ -38,6 +38,7 @@
[Pcd]
gEmbeddedTokenSpaceGuid.PcdDmaDeviceOffset
gEmbeddedTokenSpaceGuid.PcdDmaDeviceLimit
[Depex]
gEfiCpuArchProtocolGuid