libpayload arm64: Allow board to define upper address limit on DMA
Instead of forcing boards to have DMA region below 4GiB, provide
Kconfig option DMA_LIM_EXCL that a board can use to set the upper
limit in MiB units on the address range reserved by DMA. By default,
this value is 0x1000 i.e. 4GiB limit on the DMA upper address.
BUG=None
BRANCH=None
TEST=Compiles successfully for rush. Default value is seen as 0x1000.
Change-Id: Ie35d3844a0989486ae022f8922fdd4c9d7d57fb4
Signed-off-by: Patrick Georgi <pgeorgi@chromium.org>
Original-Commit-Id: 6716cf312a103bc0440a558fc43c8c77869816e3
Original-Change-Id: I3ecbb4ec90995ab1568cb0924d5ce9467492697d
Original-Signed-off-by: Furquan Shaikh <furquan@google.com>
Original-Reviewed-on: https://chromium-review.googlesource.com/245250
Original-Tested-by: Furquan Shaikh <furquan@chromium.org>
Original-Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Original-Commit-Queue: Furquan Shaikh <furquan@chromium.org>
Reviewed-on: http://review.coreboot.org/8800
Tested-by: build bot (Jenkins)
Reviewed-by: Furquan Shaikh <furquan@google.com>
diff --git a/payloads/libpayload/arch/arm64/Config.in b/payloads/libpayload/arch/arm64/Config.in
index 0f2596c..d2f8e56 100644
--- a/payloads/libpayload/arch/arm64/Config.in
+++ b/payloads/libpayload/arch/arm64/Config.in
@@ -33,4 +33,8 @@
def_bool y
select LITTLE_ENDIAN
+config DMA_LIM_EXCL
+ hex "DMA address limit(exclusive) in MiB units"
+ default 0x1000
+
endif