Author: gonzo
Date: Wed Aug 3 18:03:14 2016
New Revision: 303726
URL: https://svnweb.freebsd.org/changeset/base/303726
Log:
Fix EHCI driver by excluding first 512K from available memory
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-...@yahoo.com>
MFC after: 3 days
Modified:
head/sys/boot/fdt/dts/arm/zynq-7000.dtsi
Modified: head/sys/boot/fdt/dts/arm/zynq-7000.dtsi
==============================================================================
--- head/sys/boot/fdt/dts/arm/zynq-7000.dtsi Wed Aug 3 18:02:10 2016
(r303725)
+++ head/sys/boot/fdt/dts/arm/zynq-7000.dtsi Wed Aug 3 18:03:14 2016
(r303726)
@@ -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 {
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