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>

diff --git a/arch/xtensa/boot/dts/kc705.dts b/arch/xtensa/boot/dts/kc705.dts
index 742a347..c4d17a3 100644 (file)
--- 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>;
        };
 };