ARC: mm: HIGHMEM: populate high memory from DT

Signed-off-by: Vineet Gupta <vgupta@synopsys.com>

1 files changed, 10 insertions, 2 deletions

diff --git a/arch/arc/boot/dts/nsim_hs.dts b/arch/arc/boot/dts/nsim_hs.dts
index 911f069e0540..b0eb0e7fe21d 100644
--- a/arch/arc/boot/dts/nsim_hs.dts
+++ b/arch/arc/boot/dts/nsim_hs.dts
@@ -11,8 +11,16 @@
 
 / {
         compatible = "snps,nsim_hs";
+        #address-cells = <2>;
+        #size-cells = <2>;
         interrupt-parent = <&core_intc>;
 
+        memory {
+                device_type = "memory";
+                reg = <0x0 0x80000000 0x0 0x40000000    /* 1 GB low mem */
+                       0x1 0x00000000 0x0 0x40000000>;  /* 1 GB highmem */
+        };
+
         chosen {
                 bootargs = "earlycon=arc_uart,mmio32,0xc0fc1000,115200n8 console=ttyARC0,115200n8";
         };
@@ -26,8 +34,8 @@
                 #address-cells = <1>;
                 #size-cells = <1>;
 
-                /* child and parent address space 1:1 mapped */
-                ranges;
+                /* only perip space at end of low mem accessible */
+                ranges = <0x80000000 0x0 0x80000000 0x80000000>;
 
                 core_intc: core-interrupt-controller {
                         compatible = "snps,archs-intc";