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Fix EHCI driver by excluding first 512K from available memory

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On Zynq 256K-512K memory region is not accessible by all bus masters.
EHCI driver fails when trying to use it for DMA transfers. Patching
memory node does not help because ubldr overrides values there with
the ones obtained from u-boot. So as a workaround we just mark first
512K as reserved.

PR:		211484
Submitted by:	Thomas Skibo <thoma555-bsd@yahoo.com>
MFC after:	3 days
This commit is contained in:
Oleksandr Tymoshenko 2016-08-03 18:03:14 +00:00
parent 451cad50cd
commit 161f7406ad
1 changed files with 4 additions and 0 deletions
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4
sys/boot/fdt/dts/arm/zynq-7000.dtsi
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@ -32,6 +32,10 @@
#size-cells = <1>;
interrupt-parent = <&GIC>;
// Reserve first half megabyte because it is not accessible to all
// bus masters.
memreserve = <0x00000000 0x00080000>;
// Zynq PS System registers.
//
ps7sys@f8000000 {