diff --git a/arch/nds32/cpu/n1213/Makefile b/arch/nds32/cpu/n1213/Makefile
index b8e0d72..bb3550e 100644
--- a/arch/nds32/cpu/n1213/Makefile
+++ b/arch/nds32/cpu/n1213/Makefile
@@ -9,26 +9,4 @@
 # SPDX-License-Identifier:	GPL-2.0+
 #
 
-include $(TOPDIR)/config.mk
-
-LIB	= $(obj)lib$(CPU).o
-
-START	= start.o
-
-SRCS	:= $(START:.o=.S) $(SOBJS-y:.o=.S) $(COBJS-y:.o=.c)
-OBJS	:= $(addprefix $(obj),$(COBJS-y) $(SOBJS-y))
-START	:= $(addprefix $(obj),$(START))
-
-all:	$(obj).depend $(START) $(LIB)
-
-$(LIB):	$(OBJS)
-	$(call cmd_link_o_target, $(OBJS))
-
-#########################################################################
-
-# defines $(obj).depend target
-include $(SRCTREE)/rules.mk
-
-sinclude $(obj).depend
-
-#########################################################################
+extra-y	= start.o
diff --git a/arch/nds32/cpu/n1213/ag101/Makefile b/arch/nds32/cpu/n1213/ag101/Makefile
index b53a3eb..c21ce02 100644
--- a/arch/nds32/cpu/n1213/ag101/Makefile
+++ b/arch/nds32/cpu/n1213/ag101/Makefile
@@ -10,33 +10,12 @@
 # SPDX-License-Identifier:	GPL-2.0+
 #
 
-include $(TOPDIR)/config.mk
-
-LIB	= $(obj)lib$(SOC).o
-
-COBJS-y	:= cpu.o timer.o
+obj-y	:= cpu.o timer.o
 
 ifndef CONFIG_SKIP_LOWLEVEL_INIT
-SOBJS-y	:= lowlevel_init.o
+obj-y	+= lowlevel_init.o
 endif
 
 ifndef CONFIG_SKIP_TRUNOFF_WATCHDOG
-SOBJS-y	+= watchdog.o
+obj-y	+= watchdog.o
 endif
-
-SRCS	:= $(SOBJS-y:.o=.S) $(COBJS-y:.o=.c)
-OBJS	:= $(addprefix $(obj),$(SOBJS-y) $(COBJS-y))
-
-all:	$(obj).depend $(LIB)
-
-$(LIB):	$(OBJS)
-	$(call cmd_link_o_target, $(OBJS))
-
-#########################################################################
-
-# defines $(obj).depend target
-include $(SRCTREE)/rules.mk
-
-sinclude $(obj).depend
-
-#########################################################################
diff --git a/arch/nds32/cpu/n1213/ag102/Makefile b/arch/nds32/cpu/n1213/ag102/Makefile
index b53a3eb..c21ce02 100644
--- a/arch/nds32/cpu/n1213/ag102/Makefile
+++ b/arch/nds32/cpu/n1213/ag102/Makefile
@@ -10,33 +10,12 @@
 # SPDX-License-Identifier:	GPL-2.0+
 #
 
-include $(TOPDIR)/config.mk
-
-LIB	= $(obj)lib$(SOC).o
-
-COBJS-y	:= cpu.o timer.o
+obj-y	:= cpu.o timer.o
 
 ifndef CONFIG_SKIP_LOWLEVEL_INIT
-SOBJS-y	:= lowlevel_init.o
+obj-y	+= lowlevel_init.o
 endif
 
 ifndef CONFIG_SKIP_TRUNOFF_WATCHDOG
-SOBJS-y	+= watchdog.o
+obj-y	+= watchdog.o
 endif
-
-SRCS	:= $(SOBJS-y:.o=.S) $(COBJS-y:.o=.c)
-OBJS	:= $(addprefix $(obj),$(SOBJS-y) $(COBJS-y))
-
-all:	$(obj).depend $(LIB)
-
-$(LIB):	$(OBJS)
-	$(call cmd_link_o_target, $(OBJS))
-
-#########################################################################
-
-# defines $(obj).depend target
-include $(SRCTREE)/rules.mk
-
-sinclude $(obj).depend
-
-#########################################################################
diff --git a/arch/nds32/lib/Makefile b/arch/nds32/lib/Makefile
index 2f7e155..6ea96db 100644
--- a/arch/nds32/lib/Makefile
+++ b/arch/nds32/lib/Makefile
@@ -9,26 +9,7 @@
 # SPDX-License-Identifier:	GPL-2.0+
 #
 
-include $(TOPDIR)/config.mk
-
-LIB	= $(obj)lib$(ARCH).o
-
-COBJS-y += board.o
-COBJS-y += cache.o
-COBJS-$(CONFIG_CMD_BOOTM) += bootm.o
-COBJS-y += interrupts.o
-
-SRCS  := $(SOBJS-y:.o=.S) $(COBJS-y:.o=.c)
-OBJS	:= $(addprefix $(obj),$(SOBJS-y) $(COBJS-y))
-
-$(LIB): $(obj).depend $(OBJS)
-	$(call cmd_link_o_target, $(OBJS))
-
-#########################################################################
-
-# defines $(obj).depend target
-include $(SRCTREE)/rules.mk
-
-sinclude $(obj).depend
-
-#########################################################################
+obj-y += board.o
+obj-y += cache.o
+obj-$(CONFIG_CMD_BOOTM) += bootm.o
+obj-y += interrupts.o
diff --git a/board/AndesTech/adp-ag101/Makefile b/board/AndesTech/adp-ag101/Makefile
index 826414f..4cc590f 100644
--- a/board/AndesTech/adp-ag101/Makefile
+++ b/board/AndesTech/adp-ag101/Makefile
@@ -6,23 +6,4 @@
 # SPDX-License-Identifier:	GPL-2.0+
 #
 
-include $(TOPDIR)/config.mk
-
-LIB	= $(obj)lib$(BOARD).o
-
-COBJS-y	:= adp-ag101.o
-
-SRCS	:= $(SOBJS-y:.o=.S) $(COBJS-y:.o=.c)
-OBJS	:= $(addprefix $(obj),$(COBJS-y) $(SOBJS-y))
-
-$(LIB):	$(OBJS)
-	$(call cmd_link_o_target, $(OBJS))
-
-#########################################################################
-
-# defines $(obj).depend target
-include $(SRCTREE)/rules.mk
-
-sinclude $(obj).depend
-
-#########################################################################
+obj-y	:= adp-ag101.o
diff --git a/board/AndesTech/adp-ag101p/Makefile b/board/AndesTech/adp-ag101p/Makefile
index 875fb92..2ba7da4 100644
--- a/board/AndesTech/adp-ag101p/Makefile
+++ b/board/AndesTech/adp-ag101p/Makefile
@@ -6,23 +6,4 @@
 # SPDX-License-Identifier:	GPL-2.0+
 #
 
-include $(TOPDIR)/config.mk
-
-LIB	= $(obj)lib$(BOARD).o
-
-COBJS-y	:= adp-ag101p.o
-
-SRCS	:= $(SOBJS-y:.o=.S) $(COBJS-y:.o=.c)
-OBJS	:= $(addprefix $(obj),$(COBJS-y) $(SOBJS-y))
-
-$(LIB):	$(OBJS)
-	$(call cmd_link_o_target, $(OBJS))
-
-#########################################################################
-
-# defines $(obj).depend target
-include $(SRCTREE)/rules.mk
-
-sinclude $(obj).depend
-
-#########################################################################
+obj-y	:= adp-ag101p.o
diff --git a/board/AndesTech/adp-ag102/Makefile b/board/AndesTech/adp-ag102/Makefile
index 6c18719..fc4bf88 100644
--- a/board/AndesTech/adp-ag102/Makefile
+++ b/board/AndesTech/adp-ag102/Makefile
@@ -5,23 +5,4 @@
 # SPDX-License-Identifier:	GPL-2.0+
 #
 
-include $(TOPDIR)/config.mk
-
-LIB	= $(obj)lib$(BOARD).o
-
-COBJS-y	:= adp-ag102.o
-
-SRCS	:= $(SOBJS-y:.o=.S) $(COBJS-y:.o=.c)
-OBJS	:= $(addprefix $(obj),$(COBJS-y) $(SOBJS-y))
-
-$(LIB):	$(OBJS)
-	$(call cmd_link_o_target, $(OBJS))
-
-#########################################################################
-
-# defines $(obj).depend target
-include $(SRCTREE)/rules.mk
-
-sinclude $(obj).depend
-
-#########################################################################
+obj-y	:= adp-ag102.o