From 62a75650e4f918a7aed8e325b8beed37247e4513 Mon Sep 17 00:00:00 2001
From: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Date: Thu, 21 Nov 2019 09:32:26 +0100
Subject: EmbeddedPkg/NonCoherentDmaLib: implement support for DMA range limits

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>
---
 EmbeddedPkg/EmbeddedPkg.dec | 6 ++++++
 1 file changed, 6 insertions(+)

(limited to 'EmbeddedPkg/EmbeddedPkg.dec')

diff --git a/EmbeddedPkg/EmbeddedPkg.dec b/EmbeddedPkg/EmbeddedPkg.dec
index 8812a6d..6992280 100644
--- a/EmbeddedPkg/EmbeddedPkg.dec
+++ b/EmbeddedPkg/EmbeddedPkg.dec
@@ -187,6 +187,12 @@
   gEmbeddedTokenSpaceGuid.PcdDmaDeviceOffset|0x0|UINT64|0x0000058
 
   #
+  # Highest address value supported by the device for DMA addressing. Note
+  # that this value should be strictly greater than PcdDmaDeviceOffset.
+  #
+  gEmbeddedTokenSpaceGuid.PcdDmaDeviceLimit|0xFFFFFFFFFFFFFFFF|UINT64|0x000005A
+
+  #
   # Selection between DT and ACPI as a default
   #
   gEmbeddedTokenSpaceGuid.PcdDefaultDtPref|TRUE|BOOLEAN|0x0000059
-- 
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