X-Git-Url: https://git.kernelconcepts.de/?a=blobdiff_plain;f=Makefile;h=64e829623982898a6d683e4292257fdb1bb62db5;hb=53e6b14e037c9f72e6d03244c32d8d597e2e0234;hp=d9b2b7fa6005a84132713d0408a8ceba5a9fafa6;hpb=0a8e823ad0c5a602c93c2e8a54caf622ade6d3fb;p=karo-tx-uboot.git

diff --git a/Makefile b/Makefile
index d9b2b7fa60..64e8296239 100644
--- a/Makefile
+++ b/Makefile
@@ -180,9 +180,6 @@ unexport CDPATH
 
 #########################################################################
 
-TIMESTAMP_FILE = include/generated/timestamp_autogenerated.h
-VERSION_FILE = include/generated/version_autogenerated.h
-
 HOSTARCH := $(shell uname -m | \
 	sed -e s/i.86/x86/ \
 	    -e s/sun4u/sparc64/ \
@@ -356,9 +353,11 @@ KBUILD_CFLAGS   := -Wall -Wstrict-prototypes \
 		   -fno-builtin -ffreestanding
 KBUILD_AFLAGS   := -D__ASSEMBLY__
 
-U_BOOT_VERSION = $(VERSION)$(if $(PATCHLEVEL),.$(PATCHLEVEL)$(if $(SUBLEVEL),.$(SUBLEVEL)))$(EXTRAVERSION)
+# Read UBOOTRELEASE from include/config/uboot.release (if it exists)
+UBOOTRELEASE = $(shell cat include/config/uboot.release 2> /dev/null)
+UBOOTVERSION = $(VERSION)$(if $(PATCHLEVEL),.$(PATCHLEVEL)$(if $(SUBLEVEL),.$(SUBLEVEL)))$(EXTRAVERSION)
 
-export VERSION PATCHLEVEL SUBLEVEL U_BOOT_VERSION
+export VERSION PATCHLEVEL SUBLEVEL UBOOTRELEASE UBOOTVERSION
 export ARCH CPU BOARD VENDOR SOC
 export CONFIG_SHELL HOSTCC HOSTCFLAGS HOSTLDFLAGS CROSS_COMPILE AS LD CC
 export CPP AR NM LDR STRIP OBJCOPY OBJDUMP
@@ -411,9 +410,12 @@ endif
 # Detect when mixed targets is specified, and make a second invocation
 # of make so .config is not included in this case either (for *config).
 
+version_h := include/generated/version_autogenerated.h
+timestamp_h := include/generated/timestamp_autogenerated.h
+
 no-dot-config-targets := clean clobber mrproper distclean \
-			 cscope TAGS %tags help %docs check% coccicheck \
-			 backup
+			 help %docs check% coccicheck \
+			 ubootversion backup
 
 config-targets := 0
 mixed-targets  := 0
@@ -483,13 +485,6 @@ ifeq ($(wildcard include/config.mk),)
 $(error "System not configured - see README")
 endif
 
-ifeq ($(__HAVE_ARCH_GENERIC_BOARD),)
-ifneq ($(CONFIG_SYS_GENERIC_BOARD),)
-$(error Your architecture does not support generic board. \
-Please undefined CONFIG_SYS_GENERIC_BOARD in your board config file)
-endif
-endif
-
 # If board code explicitly specified LDSCRIPT or CONFIG_SYS_LDSCRIPT, use
 # that (or fail if absent).  Otherwise, search for a linker script in a
 # standard location.
@@ -500,7 +495,7 @@ ifndef LDSCRIPT
 	#LDSCRIPT := $(TOPDIR)/board/$(BOARDDIR)/u-boot.lds.debug
 	ifdef CONFIG_SYS_LDSCRIPT
 		# need to strip off double quotes
-		LDSCRIPT := $(CONFIG_SYS_LDSCRIPT:"%"=%)
+		LDSCRIPT := $(srctree)/$(CONFIG_SYS_LDSCRIPT:"%"=%)
 	endif
 endif
 
@@ -523,9 +518,6 @@ ifndef LDSCRIPT
 		# We don't expect a Makefile here
 		LDSCRIPT_MAKEFILE_DIR =
 	endif
-	ifeq ($(wildcard $(LDSCRIPT)),)
-$(error could not find linker script)
-	endif
 endif
 
 else
@@ -547,7 +539,9 @@ KBUILD_CFLAGS	+= -g
 KBUILD_AFLAGS	+= -g
 
 # Report stack usage if supported
-KBUILD_CFLAGS += $(call cc-option,-fstack-usage)
+ifeq ($(shell $(CONFIG_SHELL) $(srctree)/scripts/gcc-stack-usage.sh $(CC)),y)
+	KBUILD_CFLAGS += -fstack-usage
+endif
 
 KBUILD_CFLAGS += $(call cc-option,-Wno-format-nonliteral)
 
@@ -580,8 +574,6 @@ CHECKFLAGS     += $(NOSTDINC_FLAGS)
 cpp_flags := $(KBUILD_CPPFLAGS) $(CPPFLAGS) $(UBOOTINCLUDE) $(NOSTDINC_FLAGS)
 c_flags := $(KBUILD_CFLAGS) $(cpp_flags)
 
-.PHONY : $(VERSION_FILE) $(TIMESTAMP_FILE)
-
 #########################################################################
 # U-Boot objects....order is important (i.e. start must be first)
 
@@ -597,7 +589,6 @@ libs-y += $(CPUDIR)/
 ifdef SOC
 libs-y += $(CPUDIR)/$(SOC)/
 endif
-libs-$(CONFIG_IXP4XX_NPE) += drivers/net/npe/
 libs-$(CONFIG_OF_EMBED) += dts/
 libs-y += arch/$(ARCH)/lib/
 libs-y += fs/
@@ -720,7 +711,7 @@ ALL-$(CONFIG_RAMBOOT_PBL) += u-boot.pbl
 ALL-$(CONFIG_SPL) += spl/u-boot-spl.bin
 ALL-$(CONFIG_SPL_FRAMEWORK) += u-boot.img
 ALL-$(CONFIG_TPL) += tpl/u-boot-tpl.bin
-ALL-$(CONFIG_OF_SEPARATE) += u-boot-dtb.bin
+ALL-$(CONFIG_OF_SEPARATE) += u-boot.dtb u-boot-dtb.bin
 ifneq ($(CONFIG_SPL_TARGET),)
 ALL-$(CONFIG_SPL) += $(CONFIG_SPL_TARGET:"%"=%)
 endif
@@ -737,41 +728,66 @@ endif
 endif
 endif
 
-LDFLAGS_u-boot += -T u-boot.lds $(LDFLAGS_FINAL)
+LDFLAGS_u-boot += $(LDFLAGS_FINAL)
 ifneq ($(CONFIG_SYS_TEXT_BASE),)
 LDFLAGS_u-boot += -Ttext $(CONFIG_SYS_TEXT_BASE)
 endif
 
+quiet_cmd_objcopy = OBJCOPY $@
+cmd_objcopy = $(OBJCOPY) $(OBJCOPYFLAGS) $(OBJCOPYFLAGS_$(@F)) $< $@
+
+quiet_cmd_mkimage = UIMAGE  $@
+cmd_mkimage = $(objtree)/tools/mkimage $(MKIMAGEFLAGS_$(@F)) -d $< $@ \
+	$(if $(KBUILD_VERBOSE:1=), >/dev/null)
+
+quiet_cmd_cat = CAT     $@
+cmd_cat = cat $(filter-out $(PHONY), $^) > $@
+
+append = cat $(filter-out $< $(PHONY), $^) >> $@
+
+quiet_cmd_pad_cat = CAT     $@
+cmd_pad_cat = $(cmd_objcopy) && $(append) || rm -f $@
+
 all:		$(ALL-y)
 
 PHONY += dtbs
 dtbs dts/dt.dtb: checkdtc u-boot
 	$(Q)$(MAKE) $(build)=dts dtbs
 
-u-boot-dtb.bin: u-boot.bin dts/dt.dtb
-		cat $^ >$@
+u-boot-dtb.bin: u-boot.bin dts/dt.dtb FORCE
+	$(call if_changed,cat)
 
-u-boot.hex:	u-boot
-		$(OBJCOPY) ${OBJCFLAGS} -O ihex $< $@
+quiet_cmd_copy = COPY    $@
+      cmd_copy = cp $< $@
 
-u-boot.srec:	u-boot
-		$(OBJCOPY) ${OBJCFLAGS} -O srec $< $@
+u-boot.dtb: dts/dt.dtb
+	$(call cmd,copy)
 
-u-boot.bin:	u-boot
-		$(OBJCOPY) ${OBJCFLAGS} -O binary $< $@
-		$(call DO_STATIC_RELA,$<,$@,$(CONFIG_SYS_TEXT_BASE))
-		$(BOARD_SIZE_CHECK)
+OBJCOPYFLAGS_u-boot.hex := -O ihex
+
+OBJCOPYFLAGS_u-boot.srec := -O srec
+
+u-boot.hex u-boot.srec: u-boot FORCE
+	$(call if_changed,objcopy)
+
+OBJCOPYFLAGS_u-boot.bin := -O binary
+
+u-boot.bin: u-boot FORCE
+	$(call if_changed,objcopy)
+	$(call DO_STATIC_RELA,$<,$@,$(CONFIG_SYS_TEXT_BASE))
+	$(BOARD_SIZE_CHECK)
 
 u-boot.ldr:	u-boot
 		$(CREATE_LDR_ENV)
 		$(LDR) -T $(CONFIG_BFIN_CPU) -c $@ $< $(LDR_FLAGS)
 		$(BOARD_SIZE_CHECK)
 
-u-boot.ldr.hex:	u-boot.ldr
-		$(OBJCOPY) ${OBJCFLAGS} -O ihex $< $@ -I binary
+OBJCOPYFLAGS_u-boot.ldr.hex := -I binary -O ihex
 
-u-boot.ldr.srec:	u-boot.ldr
-		$(OBJCOPY) ${OBJCFLAGS} -O srec $< $@ -I binary
+OBJCOPYFLAGS_u-boot.ldr.srec := -I binary -O srec
+
+u-boot.ldr.hex u-boot.ldr.srec: u-boot.ldr FORCE
+	$(call if_changed,objcopy)
 
 #
 # U-Boot entry point, needed for booting of full-blown U-Boot
@@ -781,25 +797,21 @@ ifndef CONFIG_SYS_UBOOT_START
 CONFIG_SYS_UBOOT_START := 0
 endif
 
-u-boot.img:	u-boot.bin
-		tools/mkimage -A $(ARCH) -T firmware -C none \
-		-O u-boot -a $(CONFIG_SYS_TEXT_BASE) \
-		-e $(CONFIG_SYS_UBOOT_START) \
-		-n $(shell sed -n -e 's/.*U_BOOT_VERSION//p' $(VERSION_FILE) | \
-			sed -e 's/"[	 ]*$$/ for $(BOARD) board"/') \
-		-d $< $@
+MKIMAGEFLAGS_u-boot.img = -A $(ARCH) -T firmware -C none -O u-boot \
+	-a $(CONFIG_SYS_TEXT_BASE) -e $(CONFIG_SYS_UBOOT_START) \
+	-n "U-Boot $(UBOOTRELEASE) for $(BOARD) board"
 
-u-boot.imx: u-boot.bin
-		$(MAKE) $(build)=arch/arm/imx-common $(objtree)/u-boot.imx
+MKIMAGEFLAGS_u-boot.kwb = -n $(CONFIG_SYS_KWD_CONFIG) -T kwbimage \
+		-a $(CONFIG_SYS_TEXT_BASE) -e $(CONFIG_SYS_TEXT_BASE)
 
-u-boot.kwb:       u-boot.bin
-		tools/mkimage -n $(CONFIG_SYS_KWD_CONFIG) -T kwbimage \
-		-a $(CONFIG_SYS_TEXT_BASE) -e $(CONFIG_SYS_TEXT_BASE) -d $< $@
+MKIMAGEFLAGS_u-boot.pbl = -n $(CONFIG_SYS_FSL_PBL_RCW) \
+		-R $(CONFIG_SYS_FSL_PBL_PBI) -T pblimage
 
-u-boot.pbl:	u-boot.bin
-		tools/mkimage -n $(CONFIG_SYS_FSL_PBL_RCW) \
-		-R $(CONFIG_SYS_FSL_PBL_PBI) -T pblimage \
-		-d $< $@
+u-boot.img u-boot.kwb u-boot.pbl: u-boot.bin FORCE
+	$(call if_changed,mkimage)
+
+u-boot.imx: u-boot.bin
+	$(Q)$(MAKE) $(build)=arch/arm/imx-common $@
 
 u-boot.sha1:	u-boot.bin
 		tools/ubsha1 u-boot.bin
@@ -807,52 +819,47 @@ u-boot.sha1:	u-boot.bin
 u-boot.dis:	u-boot
 		$(OBJDUMP) -d $< > $@
 
-# $@ is output, $(1) and $(2) are inputs, $(3) is padded intermediate,
-# $(4) is pad-to
-SPL_PAD_APPEND = \
-		$(OBJCOPY) ${OBJCFLAGS} --pad-to=$(4) -I binary -O binary \
-		$(1) $(3); \
-		cat $(3) $(2) > $@; \
-		rm $(3)
-
 ifdef CONFIG_TPL
 SPL_PAYLOAD := tpl/u-boot-with-tpl.bin
 else
 SPL_PAYLOAD := u-boot.bin
 endif
 
-u-boot-with-spl.bin: spl/u-boot-spl.bin $(SPL_PAYLOAD)
-		$(call SPL_PAD_APPEND,$<,$(SPL_PAYLOAD),spl/u-boot-spl-pad.bin,$(CONFIG_SPL_PAD_TO))
+OBJCOPYFLAGS_u-boot-with-spl.bin = -I binary -O binary \
+				   --pad-to=$(CONFIG_SPL_PAD_TO)
+u-boot-with-spl.bin: spl/u-boot-spl.bin $(SPL_PAYLOAD) FORCE
+	$(call if_changed,pad_cat)
 
-tpl/u-boot-with-tpl.bin: tpl/u-boot-tpl.bin u-boot.bin
-		$(call SPL_PAD_APPEND,$<,u-boot.bin,tpl/u-boot-tpl-pad.bin,$(CONFIG_TPL_PAD_TO))
+OBJCOPYFLAGS_u-boot-with-tpl.bin = -I binary -O binary \
+				   --pad-to=$(CONFIG_TPL_PAD_TO)
+tpl/u-boot-with-tpl.bin: tpl/u-boot-tpl.bin u-boot.bin FORCE
+	$(call if_changed,pad_cat)
 
-u-boot-with-spl.imx: spl/u-boot-spl.bin u-boot.bin
-		$(MAKE) $(build)=arch/arm/imx-common \
-			$(OBJTREE)/u-boot-with-spl.imx
+SPL: spl/u-boot-spl.bin FORCE
+	$(Q)$(MAKE) $(build)=arch/arm/imx-common $@
 
-u-boot-with-nand-spl.imx: spl/u-boot-spl.bin u-boot.bin
-		$(MAKE) $(build)=arch/arm/imx-common \
-			$(OBJTREE)/u-boot-with-nand-spl.imx
+u-boot-with-spl.imx u-boot-with-nand-spl.imx: SPL u-boot.bin FORCE
+	$(Q)$(MAKE) $(build)=arch/arm/imx-common $@
 
-u-boot.ubl:       u-boot-with-spl.bin
-		tools/mkimage -n $(UBL_CONFIG) -T ublimage \
-		-e $(CONFIG_SYS_TEXT_BASE) -d $< u-boot.ubl
+MKIMAGEFLAGS_u-boot.ubl = -n $(UBL_CONFIG) -T ublimage -e $(CONFIG_SYS_TEXT_BASE)
 
-u-boot.ais:       spl/u-boot-spl.bin u-boot.img
-		tools/mkimage -s -n $(if $(CONFIG_AIS_CONFIG_FILE),$(srctree)/$(CONFIG_AIS_CONFIG_FILE:"%"=%),"/dev/null") \
-			-T aisimage \
-			-e $(CONFIG_SPL_TEXT_BASE) \
-			-d spl/u-boot-spl.bin \
-			spl/u-boot-spl.ais
-		$(OBJCOPY) ${OBJCFLAGS} -I binary \
-			--pad-to=$(CONFIG_SPL_MAX_SIZE) -O binary \
-			spl/u-boot-spl.ais spl/u-boot-spl-pad.ais
-		cat spl/u-boot-spl-pad.ais u-boot.img > u-boot.ais
+u-boot.ubl: u-boot-with-spl.bin FORCE
+	$(call if_changed,mkimage)
 
+MKIMAGEFLAGS_u-boot-spl.ais = -s -n $(if $(CONFIG_AIS_CONFIG_FILE), \
+	$(srctree)/$(CONFIG_AIS_CONFIG_FILE:"%"=%),"/dev/null") \
+	-T aisimage -e $(CONFIG_SPL_TEXT_BASE)
+spl/u-boot-spl.ais: spl/u-boot-spl.bin FORCE
+	$(call if_changed,mkimage)
 
-u-boot.sb:       u-boot.bin spl/u-boot-spl.bin
-		$(MAKE) $(build)=$(CPUDIR)/$(SOC)/ $(OBJTREE)/u-boot.sb
+OBJCOPYFLAGS_u-boot.ais = -I binary -O binary --pad-to=$(CONFIG_SPL_MAX_SIZE)
+u-boot.ais: spl/u-boot-spl.ais u-boot.img FORCE
+	$(call if_changed,pad_cat)
+
+u-boot-signed.sb: u-boot.bin spl/u-boot-spl.bin
+	$(Q)$(MAKE) $(build)=arch/arm/cpu/arm926ejs/mxs $(objtree)/u-boot-signed.sb
+u-boot.sb: u-boot.bin spl/u-boot-spl.bin
+	$(Q)$(MAKE) $(build)=arch/arm/cpu/arm926ejs/mxs $(objtree)/u-boot.sb
 
 # On x600 (SPEAr600) U-Boot is appended to U-Boot SPL.
 # Both images are created using mkimage (crc etc), so that the ROM
@@ -860,38 +867,40 @@ u-boot.sb:       u-boot.bin spl/u-boot-spl.bin
 # SPL image (with mkimage header) and not the binary. Otherwise the resulting image
 # which is loaded/copied by the ROM bootloader to SRAM doesn't fit.
 # The resulting image containing both U-Boot images is called u-boot.spr
-u-boot.spr:	u-boot.img spl/u-boot-spl.bin
-		tools/mkimage -A $(ARCH) -T firmware -C none \
-		-a $(CONFIG_SPL_TEXT_BASE) -e $(CONFIG_SPL_TEXT_BASE) -n XLOADER \
-		-d spl/u-boot-spl.bin $@
-		$(OBJCOPY) -I binary -O binary \
-			--pad-to=$(CONFIG_SPL_PAD_TO) --gap-fill=0xff $@
-		cat u-boot.img >> $@
+MKIMAGEFLAGS_u-boot-spl.img = -A $(ARCH) -T firmware -C none \
+	-a $(CONFIG_SPL_TEXT_BASE) -e $(CONFIG_SPL_TEXT_BASE) -n XLOADER
+spl/u-boot-spl.img: spl/u-boot-spl.bin FORCE
+	$(call if_changed,mkimage)
+
+OBJCOPYFLAGS_u-boot.spr = -I binary -O binary --pad-to=$(CONFIG_SPL_PAD_TO) \
+			  --gap-fill=0xff
+u-boot.spr: spl/u-boot-spl.img u-boot.img FORCE
+	$(call if_changed,pad_cat)
 
 ifneq ($(CONFIG_TEGRA),)
-u-boot-nodtb-tegra.bin: spl/u-boot-spl.bin u-boot.bin
-		$(OBJCOPY) ${OBJCFLAGS} --pad-to=$(CONFIG_SYS_TEXT_BASE) -O binary spl/u-boot-spl spl/u-boot-spl-pad.bin
-		cat spl/u-boot-spl-pad.bin u-boot.bin > $@
-		rm spl/u-boot-spl-pad.bin
+OBJCOPYFLAGS_u-boot-nodtb-tegra.bin = -O binary --pad-to=$(CONFIG_SYS_TEXT_BASE)
+u-boot-nodtb-tegra.bin: spl/u-boot-spl u-boot.bin FORCE
+	$(call if_changed,pad_cat)
 
 ifeq ($(CONFIG_OF_SEPARATE),y)
-u-boot-dtb-tegra.bin: u-boot-nodtb-tegra.bin dts/dt.dtb
-		cat $^ > $@
+u-boot-dtb-tegra.bin: u-boot-nodtb-tegra.bin dts/dt.dtb FORCE
+	$(call if_changed,cat)
 endif
 endif
 
-u-boot-img.bin: spl/u-boot-spl.bin u-boot.img
-		cat spl/u-boot-spl.bin u-boot.img > $@
+u-boot-img.bin: spl/u-boot-spl.bin u-boot.img FORCE
+	$(call if_changed,cat)
 
 # PPC4xx needs the SPL at the end of the image, since the reset vector
 # is located at 0xfffffffc. So we can't use the "u-boot-img.bin" target
 # and need to introduce a new build target with the full blown U-Boot
 # at the start padded up to the start of the SPL image. And then concat
 # the SPL image to the end.
-u-boot-img-spl-at-end.bin: spl/u-boot-spl.bin u-boot.img
-		$(OBJCOPY) -I binary -O binary --pad-to=$(CONFIG_UBOOT_PAD_TO) \
-			 --gap-fill=0xff u-boot.img $@
-		cat spl/u-boot-spl.bin >> $@
+
+OBJCOPYFLAGS_u-boot-img-spl-at-end.bin := -I binary -O binary \
+	--pad-to=$(CONFIG_UBOOT_PAD_TO) --gap-fill=0xff
+u-boot-img-spl-at-end.bin: u-boot.img spl/u-boot-spl.bin FORCE
+	$(call if_changed,pad_cat)
 
 # Create a new ELF from a raw binary file.  This is useful for arm64
 # where static relocation needs to be performed on the raw binary,
@@ -905,27 +914,22 @@ u-boot.elf: u-boot.bin
 		--defsym=_start=$(CONFIG_SYS_TEXT_BASE) \
 		-Ttext=$(CONFIG_SYS_TEXT_BASE)
 
-ifeq ($(CONFIG_SANDBOX),y)
-GEN_UBOOT = \
-		$(CC) $(SYMS) -T u-boot.lds \
-			-Wl,--start-group $(u-boot-main) -Wl,--end-group \
-			$(PLATFORM_LIBS) -Wl,-Map -Wl,u-boot.map -o u-boot
-else
-GEN_UBOOT = \
-		$(LD) $(LDFLAGS) $(LDFLAGS_$(@F)) \
-			$(u-boot-init) \
-			--start-group $(u-boot-main) --end-group $(PLATFORM_LIBS) \
-			-Map u-boot.map -o u-boot
-endif
+# Rule to link u-boot
+# May be overridden by arch/$(ARCH)/config.mk
+quiet_cmd_u-boot__ ?= LD      $@
+      cmd_u-boot__ ?= $(LD) $(LDFLAGS) $(LDFLAGS_u-boot) -o $@ \
+      -T u-boot.lds $(u-boot-init)                             \
+      --start-group $(u-boot-main) --end-group                 \
+      $(PLATFORM_LIBS) -Map u-boot.map
 
 u-boot:	$(u-boot-init) $(u-boot-main) u-boot.lds
-		$(GEN_UBOOT)
+	$(call if_changed,u-boot__)
 ifeq ($(CONFIG_KALLSYMS),y)
-		smap=`$(call SYSTEM_MAP,u-boot) | \
-			awk '$$2 ~ /[tTwW]/ {printf $$1 $$3 "\\\\000"}'` ; \
-		$(CC) $(c_flags) -DSYSTEM_MAP="\"$${smap}\"" \
-			-c $(srctree)/common/system_map.c -o common/system_map.o
-		$(GEN_UBOOT) common/system_map.o
+	smap=`$(call SYSTEM_MAP,u-boot) | \
+		awk '$$2 ~ /[tTwW]/ {printf $$1 $$3 "\\\\000"}'` ; \
+	$(CC) $(c_flags) -DSYSTEM_MAP="\"$${smap}\"" \
+		-c $(srctree)/common/system_map.c -o common/system_map.o
+	$(call cmd,u-boot__) common/system_map.o
 endif
 
 # The actual objects are generated when descending, 
@@ -939,16 +943,25 @@ $(sort $(u-boot-init) $(u-boot-main)): $(u-boot-dirs) ;
 # Error messages still appears in the original language
 
 PHONY += $(u-boot-dirs)
-$(u-boot-dirs): depend prepare scripts
+$(u-boot-dirs): prepare scripts
 	$(Q)$(MAKE) $(build)=$@
 
-tools: $(TIMESTAMP_FILE) $(VERSION_FILE)
+tools: prepare
 # The "tools" are needed early
 $(filter-out tools, $(u-boot-dirs)): tools
 # The "examples" conditionally depend on U-Boot (say, when USE_PRIVATE_LIBGCC
 # is "yes"), so compile examples after U-Boot is compiled.
 examples: $(filter-out examples, $(u-boot-dirs))
 
+define filechk_uboot.release
+	echo "$(UBOOTVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))"
+endef
+
+# Store (new) UBOOTRELEASE string in include/config/uboot.release
+include/config/uboot.release: Makefile FORCE
+	$(call filechk,uboot.release)
+
+
 # Things we need to do before we recursively start building the kernel
 # or the modules are listed in "prepare".
 # A multi level approach is used. prepareN is processed before prepareN-1.
@@ -961,7 +974,7 @@ PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3
 # prepare3 is used to check if we are building in a separate output directory,
 # and if so do:
 # 1) Check that make has not been executed in the kernel src $(srctree)
-prepare3:
+prepare3: include/config/uboot.release
 ifneq ($(KBUILD_SRC),)
 	@$(kecho) '  Using $(srctree) as source for u-boot'
 	$(Q)if [ -f $(srctree)/include/config.mk ]; then \
@@ -974,17 +987,48 @@ endif
 # prepare2 creates a makefile if using a separate output directory
 prepare2: prepare3 outputmakefile
 
-prepare1: prepare2
-	@:
+prepare1: prepare2 $(version_h) $(timestamp_h)
+ifeq ($(__HAVE_ARCH_GENERIC_BOARD),)
+ifeq ($(CONFIG_SYS_GENERIC_BOARD),y)
+	@echo >&2 "  Your architecture does not support generic board."
+	@echo >&2 "  Please undefine CONFIG_SYS_GENERIC_BOARD in your board config file."
+	@/bin/false
+endif
+endif
+ifeq ($(wildcard $(LDSCRIPT)),)
+	@echo >&2 "  Could not find linker script."
+	@/bin/false
+endif
 
 archprepare: prepare1 scripts_basic
 
 prepare0: archprepare FORCE
-	@:
+	$(Q)$(MAKE) $(build)=.
 
 # All the preparing..
 prepare: prepare0
 
+# Generate some files
+# ---------------------------------------------------------------------------
+
+define filechk_version.h
+	(echo \#define PLAIN_VERSION \"$(UBOOTRELEASE)\"; \
+	echo \#define U_BOOT_VERSION \"U-Boot \" PLAIN_VERSION; \
+	echo \#define CC_VERSION_STRING \"$$($(CC) --version | head -n 1)\"; \
+	echo \#define LD_VERSION_STRING \"$$($(LD) --version | head -n 1)\"; )
+endef
+
+define filechk_timestamp.h
+	(LC_ALL=C date +'#define U_BOOT_DATE "%b %d %C%y"'; \
+	LC_ALL=C date +'#define U_BOOT_TIME "%T"')
+endef
+
+$(version_h): $(srctree)/Makefile FORCE
+	$(call filechk,version.h)
+
+$(timestamp_h): $(srctree)/Makefile FORCE
+	$(call filechk,timestamp.h)
+
 #
 # Auto-generate the autoconf.mk file (which is included by all makefiles)
 #
@@ -1008,38 +1052,43 @@ quiet_cmd_autoconf = GEN     $@
 include/autoconf.mk: include/config.h
 	$(call cmd,autoconf)
 
-u-boot.lds: $(LDSCRIPT) depend
-		$(CPP) $(cpp_flags) $(LDPPFLAGS) -ansi -D__ASSEMBLY__ -P - <$< >$@
+# ---------------------------------------------------------------------------
+
+PHONY += depend dep
+depend dep:
+	@echo '*** Warning: make $@ is unnecessary now.'
 
-nand_spl:	$(TIMESTAMP_FILE) $(VERSION_FILE) depend prepare
-		$(MAKE) $(build)=nand_spl/board/$(BOARDDIR) all
+# ---------------------------------------------------------------------------
+quiet_cmd_cpp_lds = LDS     $@
+cmd_cpp_lds = $(CPP) $(cpp_flags) $(LDPPFLAGS) -ansi -D__ASSEMBLY__ \
+		-x assembler-with-cpp -P -o $@ $<
 
-u-boot-nand.bin:	nand_spl u-boot.bin
-		cat nand_spl/u-boot-spl-16k.bin u-boot.bin > u-boot-nand.bin
+u-boot.lds: $(LDSCRIPT) prepare FORCE
+	$(call if_changed,cpp_lds)
 
-spl/u-boot-spl.bin: tools depend prepare 
-		$(MAKE) obj=spl -f $(srctree)/spl/Makefile all
+PHONY += nand_spl
+nand_spl: prepare
+	$(Q)$(MAKE) $(build)=nand_spl/board/$(BOARDDIR) all
 
-tpl/u-boot-tpl.bin: tools depend prepare
-		$(MAKE) obj=tpl -f $(srctree)/spl/Makefile all CONFIG_TPL_BUILD=y
+nand_spl/u-boot-spl-16k.bin: nand_spl
+	@:
 
-# Explicitly make _depend in subdirs containing multiple targets to prevent
-# parallel sub-makes creating .depend files simultaneously.
-depend dep:	$(TIMESTAMP_FILE) $(VERSION_FILE) \
-		include/generated/generic-asm-offsets.h \
-		include/generated/asm-offsets.h
+u-boot-nand.bin: nand_spl/u-boot-spl-16k.bin u-boot.bin FORCE
+	$(call if_changed,cat)
+
+spl/u-boot-spl.bin: spl/u-boot-spl
+	@:
+spl/u-boot-spl: tools prepare
+	$(Q)$(MAKE) obj=spl -f $(srctree)/spl/Makefile all
+
+tpl/u-boot-tpl.bin: tools prepare
+	$(Q)$(MAKE) obj=tpl -f $(srctree)/spl/Makefile all CONFIG_TPL_BUILD=y
 
 TAG_SUBDIRS := $(u-boot-dirs) include
 
 FIND := find
 FINDFLAGS := -L
 
-PHONY += checkstack
-
-checkstack:
-	$(OBJDUMP) -d u-boot $$(find . -name u-boot-spl) | \
-	$(PERL) $(src)/scripts/checkstack.pl $(ARCH)
-
 tags ctags:
 		ctags -w -o ctags `$(FIND) $(FINDFLAGS) $(TAG_SUBDIRS) \
 						-name '*.[chS]' -print`
@@ -1082,37 +1131,6 @@ checkdtc:
 		false; \
 	fi
 
-quiet_cmd_offsets = GEN     $@
-      cmd_offsets = $(srctree)/tools/scripts/make-asm-offsets $< $@
-
-include/generated/generic-asm-offsets.h: lib/asm-offsets.s
-	$(call cmd,offsets)
-
-quiet_cmd_asm-offsets.s = CC      $@
-      cmd_asm-offsets.s = mkdir -p lib; \
-		$(CC) -DDO_DEPS_ONLY \
-		$(c_flags) $(CFLAGS_$(BCURDIR)/$(@F)) $(CFLAGS_$(BCURDIR)) \
-		-o $@ $< -c -S
-
-lib/asm-offsets.s: $(srctree)/lib/asm-offsets.c include/config.h
-	$(call cmd,asm-offsets.s)
-
-include/generated/asm-offsets.h: $(CPUDIR)/$(SOC)/asm-offsets.s
-	$(call cmd,offsets)
-
-quiet_cmd_soc_asm-offsets.s = CC      $@
-      cmd_soc_asm-offsets.s = mkdir -p $(CPUDIR)/$(SOC); \
-	if [ -f $(srctree)/$(CPUDIR)/$(SOC)/asm-offsets.c ];then \
-		$(CC) -DDO_DEPS_ONLY \
-		$(c_flags) $(CFLAGS_$(BCURDIR)/$(@F)) $(CFLAGS_$(BCURDIR)) \
-			-o $@ $(srctree)/$(CPUDIR)/$(SOC)/asm-offsets.c -c -S; \
-	else \
-		touch $@; \
-	fi
-
-$(CPUDIR)/$(SOC)/asm-offsets.s:	include/config.h
-	$(call cmd,soc_asm-offsets.s)
-
 #########################################################################
 
 # ARM relocations should all be R_ARM_RELATIVE (32-bit) or
@@ -1126,27 +1144,7 @@ checkarmreloc: u-boot
 		false; \
 	fi
 
-$(VERSION_FILE):
-		@mkdir -p $(dir $(VERSION_FILE))
-		@( localvers='$(shell $(TOPDIR)/scripts/setlocalversion $(TOPDIR))' ; \
-		   printf '#define PLAIN_VERSION "%s%s"\n' \
-			"$(U_BOOT_VERSION)" "$${localvers}" ; \
-		   printf '#define U_BOOT_VERSION "U-Boot %s%s"\n' \
-			"$(U_BOOT_VERSION)" "$${localvers}" ; \
-		) > $@.tmp
-		@( printf '#define CC_VERSION_STRING "%s"\n' \
-		 '$(shell $(CC) --version | head -n 1)' )>>  $@.tmp
-		@( printf '#define LD_VERSION_STRING "%s"\n' \
-		 '$(shell $(LD) -v | head -n 1)' )>>  $@.tmp
-		@cmp -s $@ $@.tmp && rm -f $@.tmp || mv -f $@.tmp $@
-
-$(TIMESTAMP_FILE):
-		@mkdir -p $(dir $(TIMESTAMP_FILE))
-		@LC_ALL=C date +'#define U_BOOT_DATE "%b %d %C%y"' > $@.tmp
-		@LC_ALL=C date +'#define U_BOOT_TIME "%T"' >> $@.tmp
-		@cmp -s $@ $@.tmp && rm -f $@.tmp || mv -f $@.tmp $@
-
-env: depend scripts_basic
+env: scripts_basic
 	$(Q)$(MAKE) $(build)=tools/$@
 
 tools-all: HOST_TOOLS_ALL=y
@@ -1179,7 +1177,7 @@ CLEAN_FILES += u-boot.lds include/bmp_logo.h include/bmp_logo_data.h \
 CLOBBER_DIRS  += $(patsubst %,spl/%, $(filter-out Makefile, \
 		 $(shell ls -1 spl 2>/dev/null))) \
 		 tpl
-CLOBBER_FILES += u-boot* MLO MLO* SPL System.map nand_spl/u-boot*
+CLOBBER_FILES += u-boot* MLO* SPL System.map nand_spl/u-boot*
 
 # Directories & files removed with 'make mrproper'
 MRPROPER_DIRS  += include/config include/generated
@@ -1256,6 +1254,51 @@ backup:
 	F=`basename $(TOPDIR)` ; cd .. ; \
 	gtar --force-local -zcvf `LC_ALL=C date "+$$F-%Y-%m-%d-%T.tar.gz"` $$F
 
+help:
+	@echo  'Cleaning targets:'
+	@echo  '  clean		  - Remove most generated files but keep the config and'
+	@echo  '                    necessities for testing u-boot'
+	@echo  '  clobber	  - Remove most generated files but keep the config'
+	@echo  '  mrproper	  - Remove all generated files + config + various backup files'
+	@echo  '  distclean	  - mrproper + remove editor backup and patch files'
+	@echo  ''
+# uncomment after adding Kconfig feature
+#	@echo  'Configuration targets:'
+#	@$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
+#	@echo  ''
+	@echo  'Other generic targets:'
+	@echo  '  all		  - Build all necessary images depending on configuration'
+	@echo  '  u-boot	  - Build the bare u-boot'
+	@echo  '  dir/            - Build all files in dir and below'
+	@echo  '  dir/file.[oisS] - Build specified target only'
+	@echo  '  dir/file.lst    - Build specified mixed source/assembly target only'
+	@echo  '                    (requires a recent binutils and recent build (System.map))'
+	@echo  '  tags/TAGS	  - Generate tags file for editors'
+	@echo  '  cscope	  - Generate cscope index'
+	@echo  '  ubootrelease	  - Output the release version string'
+	@echo  '  ubootversion	  - Output the version stored in Makefile'
+	@echo  ''
+	@echo  'Static analysers'
+	@echo  '  checkstack      - Generate a list of stack hogs'
+	@echo  ''
+	@echo  'Documentation targets:'
+	@$(MAKE) -f $(srctree)/doc/DocBook/Makefile dochelp
+	@echo  ''
+	@echo  '  make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
+	@echo  '  make V=2   [targets] 2 => give reason for rebuild of target'
+	@echo  '  make O=dir [targets] Locate all output files in "dir", including .config'
+	@echo  '  make C=1   [targets] Check all c source with $$CHECK (sparse by default)'
+	@echo  '  make C=2   [targets] Force check of all c source with $$CHECK'
+	@echo  '  make RECORDMCOUNT_WARN=1 [targets] Warn about ignored mcount sections'
+	@echo  '  make W=n   [targets] Enable extra gcc checks, n=1,2,3 where'
+	@echo  '		1: warnings which may be relevant and do not occur too often'
+	@echo  '		2: warnings which occur quite often but may still be relevant'
+	@echo  '		3: more obscure warnings, can most likely be ignored'
+	@echo  '		Multiple levels can be combined with W=12 or W=123'
+	@echo  ''
+	@echo  'Execute "make" or "make all" to build all targets marked with [*] '
+	@echo  'For further info see the ./README file'
+
 
 # Documentation targets
 # ---------------------------------------------------------------------------
@@ -1271,12 +1314,86 @@ scripts: ;
 endif #ifeq ($(config-targets),1)
 endif #ifeq ($(mixed-targets),1)
 
+PHONY += checkstack ubootrelease ubootversion
+
+checkstack:
+	$(OBJDUMP) -d u-boot $$(find . -name u-boot-spl) | \
+	$(PERL) $(src)/scripts/checkstack.pl $(ARCH)
+
+ubootrelease:
+	@echo "$(UBOOTVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))"
+
+ubootversion:
+	@echo $(UBOOTVERSION)
+
+# Single targets
+# ---------------------------------------------------------------------------
+# Single targets are compatible with:
+# - build with mixed source and output
+# - build with separate output dir 'make O=...'
+# - external modules
+#
+#  target-dir => where to store outputfile
+#  build-dir  => directory in kernel source tree to use
+
+ifeq ($(KBUILD_EXTMOD),)
+        build-dir  = $(patsubst %/,%,$(dir $@))
+        target-dir = $(dir $@)
+else
+        zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@)))
+        build-dir  = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash))
+        target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@))
+endif
+
+%.s: %.c prepare scripts FORCE
+	$(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
+%.i: %.c prepare scripts FORCE
+	$(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
+%.o: %.c prepare scripts FORCE
+	$(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
+%.lst: %.c prepare scripts FORCE
+	$(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
+%.s: %.S prepare scripts FORCE
+	$(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
+%.o: %.S prepare scripts FORCE
+	$(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
+%.symtypes: %.c prepare scripts FORCE
+	$(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
+
+# Modules
+/: prepare scripts FORCE
+	$(cmd_crmodverdir)
+	$(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
+	$(build)=$(build-dir)
+%/: prepare scripts FORCE
+	$(cmd_crmodverdir)
+	$(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
+	$(build)=$(build-dir)
+%.ko: prepare scripts FORCE
+	$(cmd_crmodverdir)
+	$(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1)   \
+	$(build)=$(build-dir) $(@:.ko=.o)
+	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
+
+# FIXME Should go into a make.lib or something 
+# ===========================================================================
+
 quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN   $(wildcard $(rm-dirs)))
       cmd_rmdirs = rm -rf $(rm-dirs)
 
 quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN   $(wildcard $(rm-files)))
       cmd_rmfiles = rm -f $(rm-files)
 
+# read all saved command lines
+
+targets := $(wildcard $(sort $(targets)))
+cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
+
+ifneq ($(cmd_files),)
+  $(cmd_files): ;	# Do not try to update included dependency files
+  include $(cmd_files)
+endif
+
 # Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir
 # Usage:
 # $(Q)$(MAKE) $(clean)=dir