xtensa: configure kc705 for highmem

Enable all memory available on KC705 (1G - 128M) by default. Update memory
node in DTS and also limit usable memory in bootargs in case memmap is
passed from the bootloader.

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>

1 files changed, 4 insertions, 1 deletions

diff --git a/arch/xtensa/boot/dts/kc705.dts b/arch/xtensa/boot/dts/kc705.dts
index 742a347be67a..c4d17a34ab86 100644
--- a/arch/xtensa/boot/dts/kc705.dts
+++ b/arch/xtensa/boot/dts/kc705.dts
@@ -4,8 +4,11 @@
 
 / {
         compatible = "cdns,xtensa-kc705";
+        chosen {
+                bootargs = "earlycon=uart8250,mmio32,0xfd050020,115200n8 console=ttyS0,115200n8 ip=dhcp root=/dev/nfs rw debug memmap=0x38000000";
+        };
         memory@0 {
                 device_type = "memory";
-                reg = <0x00000000 0x08000000>;
+                reg = <0x00000000 0x38000000>;
         };
 };