conf/evalsoc: in order to keep linux sdk consistent, create non-cachable region for rv32 xec, event if xec is not ENABLE. when xec dts node status is changed to okay, rv32 xec can work right now.

Signed-off-by: guibing <guibing@nucleisys.com>

Author: matthewgui

conf/evalsoc/nuclei_rv32imac.dts

@@ -180,7 +180,7 @@
         /* reserve 64KB memroy as non-cachable region */
         no-map;
         reg = <0x0 0xFD000000 0x0 0x10000>;
-        status = "disabled";
+        status = "okay";
     };
   };
 

conf/evalsoc/nuclei_rv32imafdc.dts

@@ -171,6 +171,19 @@
     reg = <0x0 0x80000000 0x0 0x7E000000>;
   };
 
+  reserved-memory {
+    #address-cells = <2>;
+    #size-cells = <2>;
+    ranges;
+
+    noncachable_memory: region@FD000000 {
+        /* reserve 64KB memroy as non-cachable region */
+        no-map;
+        reg = <0x0 0xFD000000 0x0 0x10000>;
+        status = "okay";
+    };
+  };
+
   soc {
     #address-cells = <2>;
     #size-cells = <2>;
@@ -303,7 +316,7 @@
     /*local-mac-address = [00 2b 20 21 03 23];*/
     phy-handle = <&rtl8211f>;
     phy-mode = "rgmii";
-    desc_mem = <0x0 0x90000000 0x0 0x10000>;
+    desc_mem = <&noncachable_memory>;
     status = "disabled";
     mdio {
         compatible = "snps,dwmac-mdio";

conf/evalsoc/opensbi/evalsoc.c

@@ -32,11 +32,11 @@ static int nuclei_evalsoc_final_init(bool cold_boot,
 	}
 
 	/*
-	 * If arch is rv32 or rv64 without svpbmt feature, you can use mattri to set DLM as non-cachable region.
-	 * xec dts node should contain desc_mem region; which is DLM region used to store xec descriptors.
+	 * If arch is rv32 or rv64 without svpbmt feature, you can use mattri to set ddr base:0xfd000000,size:0x10000 as non-cachable region.
+	 * xec dts node should contain desc_mem region from base:0xfd000000,size:0x10000; which is reserved region used to store xec descriptors.
 	 * if rv64 with svpbmt feature, xec dts node must not contain desc_mem property.
 	 */
-#ifdef NUCLEI_XEC_USING_NONCACHABLE
+#if __riscv_xlen == 32
 	#define mattri1_base 0x7f5
 	#define mattri1_mask 0x7f6