diff --git a/SoC/evalsoc/Common/npk.yml b/SoC/evalsoc/Common/npk.yml
index 56d6276f..cb8bc3b9 100644
--- a/SoC/evalsoc/Common/npk.yml
+++ b/SoC/evalsoc/Common/npk.yml
@@ -275,6 +275,11 @@ configuration:
     hints: "_zba_zbb_zbc_zbs_xxldsp"
     global: true
     description: ARCH Extensions(ARCH_EXT=)
+  nuclei_gen:
+    default_value: 0
+    type: checkbox
+    tips: "If SDK is generated by cpu nuclei_gen tool, please click it!"
+    description: SDK gen by nuclei_gen
   nuclei_cache:
     default_value: []
     type: multicheckbox_v2
@@ -446,6 +451,10 @@ buildconfig:
       - flags: -x assembler-with-cpp
     cxxflags:
     common_defines:
+      # if SDK is generated by cpu nuclei_gen tool it will define HAS_AUTOGEN_CPUCFG
+      # to match the cpu rtl configuration
+      - defines: HAS_AUTOGEN_CPUCFG
+        condition: $( ${nuclei_gen} == 1 )
       - defines: SMP_CPU_CNT=${nuclei_smp}
         condition: $( ${nuclei_smp} > 1 )
       - defines: BOOT_HARTID=${boothartid}
diff --git a/SoC/evalsoc/build.mk b/SoC/evalsoc/build.mk
index 01b30329..bc40255e 100644
--- a/SoC/evalsoc/build.mk
+++ b/SoC/evalsoc/build.mk
@@ -109,7 +109,11 @@ ifneq ($(SPLITMODE),)
 OPENOCD_CMD_ARGS += set SPLITMODE $(SPLITMODE);
 endif
 
-# If using generated cpu configs
+# If using generated cpu configs done by nuclei_gen
+# Notice: cpu nuclei_gen tool will do the following things:
+# 1. generate autogen_nuclei_cpu.h in where evalsoc.h located
+# 2. generate Makefile.global in <SDK>/Build/ folder
+# 3. sed and replace flash/ilm/dlm/sram/ddr base and size in gcc_evalsoc_*.ld
 ifeq ($(CPU_CONFIG_K),1)
 COMMON_FLAGS += -DHAS_AUTOGEN_CPUCFG
 endif