mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-12-02 01:19:49 +00:00
026f9cf24f
Kbuild brought about many advantages for us but a significant
performance regression was reported by Simon Glass.
After some discussions and analysis, it turned out
its main cause is in $(call cc-option,...).
Historically, U-Boot parses all config.mk
(arch/*/config.mk and board/*/config.mk)
every time descending into subdirectories.
That means cc-options are evaluated over and over again.
$(call cc-option,...) is useful but costly.
So we want to evaluate them only in ./Makefile
and spl/Makefile and export compiler flags.
This commit changes the build system as follows:
- Modify scripts/Makefile.build to not include config.mk
Instead, add $(PLATFORM_CPPFLAGS) to asflags-y, ccflags-y,
cppflags-y.
- Export many variables
Going forward, Kbuild will not parse config.mk files
when it descends into subdirectories.
If we want to set variables in config.mk and use them
in subdirectories, they must be exported.
This is the list of variables to get exported:
PLATFORM_CPPFLAGS
CPUDIR
BOARDDIR
OBJCOPYFLAGS
LDFLAGS
LDFLAGS_FINAL
(used in nand_spl/board/*/*/Makefile)
CONFIG_STANDALONE_LOAD_ADDR
(used in examples/standalone/Makefile)
SYM_PREFIX
(used in examples/standalone/Makefile)
RELFLAGS
(used in examples/standalone/Makefile)
- Delete CPPFLAGS
This variable has been replaced with PLATFORM_CPPFLAGS
- Copy gcclibdir from example/standalone/Makefile
to arch/sparc/config.mk
The reference in CONFIG_STANDALONE_LOAD_ADDR must be
resolved before it is exported.
Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
Reported-by: Simon Glass <sjg@chromium.org>
Acked-by: Simon Glass <sjg@chromium.org>
Tested-by: Simon Glass <sjg@chromium.org> [on Sandbox]
Tested-by: Stephen Warren <swarren@nvidia.com> [on Tegra]
255 lines
7.5 KiB
Makefile
255 lines
7.5 KiB
Makefile
#
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# (C) Copyright 2000-2011
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# Wolfgang Denk, DENX Software Engineering, wd@denx.de.
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#
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# (C) Copyright 2011
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# Daniel Schwierzeck, daniel.schwierzeck@googlemail.com.
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#
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# (C) Copyright 2011
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# Texas Instruments Incorporated - http://www.ti.com/
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# Aneesh V <aneesh@ti.com>
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#
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# SPDX-License-Identifier: GPL-2.0+
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#
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# Based on top-level Makefile.
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#
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src := $(obj)
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# Create output directory if not already present
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_dummy := $(shell [ -d $(obj) ] || mkdir -p $(obj))
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include $(srctree)/scripts/Kbuild.include
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CONFIG_SPL_BUILD := y
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export CONFIG_SPL_BUILD
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KBUILD_CPPFLAGS += -DCONFIG_SPL_BUILD
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ifeq ($(CONFIG_TPL_BUILD),y)
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KBUILD_CPPFLAGS += -DCONFIG_TPL_BUILD
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endif
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ifeq ($(CONFIG_TPL_BUILD),y)
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export CONFIG_TPL_BUILD
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SPL_BIN := u-boot-tpl
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else
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SPL_BIN := u-boot-spl
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endif
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include include/config.mk
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ifeq ($(CONFIG_TPL_BUILD),y)
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-include include/tpl-autoconf.mk
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else
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-include include/spl-autoconf.mk
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endif
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include $(TOPDIR)/config.mk
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# Enable garbage collection of un-used sections for SPL
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KBUILD_CFLAGS += -ffunction-sections -fdata-sections
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LDFLAGS_FINAL += --gc-sections
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# FIX ME
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cpp_flags := $(KBUILD_CPPFLAGS) $(PLATFORM_CPPFLAGS) $(UBOOTINCLUDE) \
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$(NOSTDINC_FLAGS)
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c_flags := $(KBUILD_CFLAGS) $(cpp_flags)
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# Auto-generate the spl-autoconf.mk file (which is included by all makefiles for SPL)
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quiet_cmd_autoconf = GEN $@
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cmd_autoconf = \
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$(CPP) $(c_flags) -DDO_DEPS_ONLY -dM $(srctree)/include/common.h > $@.tmp && \
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sed -n -f $(srctree)/tools/scripts/define2mk.sed $@.tmp > $@; \
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rm $@.tmp
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include/tpl-autoconf.mk: include/config.h
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$(call cmd,autoconf)
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include/spl-autoconf.mk: include/config.h
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$(call cmd,autoconf)
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HAVE_VENDOR_COMMON_LIB = $(if $(wildcard $(SRCTREE)/board/$(VENDOR)/common/Makefile),y,n)
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ifdef CONFIG_SPL_START_S_PATH
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START_PATH := $(CONFIG_SPL_START_S_PATH:"%"=%)
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else
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START_PATH := $(CPUDIR)
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endif
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head-y := $(START_PATH)/start.o
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head-$(CONFIG_X86) += $(START_PATH)/start16.o $(START_PATH)/resetvec.o
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head-$(CONFIG_4xx) += $(START_PATH)/resetvec.o
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head-$(CONFIG_MPC85xx) += $(START_PATH)/resetvec.o
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libs-y += arch/$(ARCH)/lib/
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libs-y += $(CPUDIR)/
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ifdef SOC
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libs-y += $(CPUDIR)/$(SOC)/
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endif
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libs-y += board/$(BOARDDIR)/
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libs-$(HAVE_VENDOR_COMMON_LIB) += board/$(VENDOR)/common/
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libs-$(CONFIG_SPL_FRAMEWORK) += common/spl/
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libs-$(CONFIG_SPL_LIBCOMMON_SUPPORT) += common/
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libs-$(CONFIG_SPL_LIBDISK_SUPPORT) += disk/
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libs-$(CONFIG_SPL_I2C_SUPPORT) += drivers/i2c/
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libs-$(CONFIG_SPL_GPIO_SUPPORT) += drivers/gpio/
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libs-$(CONFIG_SPL_MMC_SUPPORT) += drivers/mmc/
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libs-$(CONFIG_SPL_MPC8XXX_INIT_DDR_SUPPORT) += drivers/ddr/fsl/
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libs-$(CONFIG_SPL_SERIAL_SUPPORT) += drivers/serial/
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libs-$(CONFIG_SPL_SPI_FLASH_SUPPORT) += drivers/mtd/spi/
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libs-$(CONFIG_SPL_SPI_SUPPORT) += drivers/spi/
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libs-y += fs/
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libs-$(CONFIG_SPL_LIBGENERIC_SUPPORT) += lib/
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libs-$(CONFIG_SPL_POWER_SUPPORT) += drivers/power/ drivers/power/pmic/
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libs-$(if $(CONFIG_CMD_NAND),$(CONFIG_SPL_NAND_SUPPORT)) += drivers/mtd/nand/
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libs-$(CONFIG_SPL_DRIVERS_MISC_SUPPORT) += drivers/misc/
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libs-$(CONFIG_SPL_ONENAND_SUPPORT) += drivers/mtd/onenand/
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libs-$(CONFIG_SPL_DMA_SUPPORT) += drivers/dma/
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libs-$(CONFIG_SPL_POST_MEM_SUPPORT) += post/drivers/
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libs-$(CONFIG_SPL_NET_SUPPORT) += net/
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libs-$(CONFIG_SPL_ETH_SUPPORT) += drivers/net/
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libs-$(CONFIG_SPL_ETH_SUPPORT) += drivers/net/phy/
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libs-$(CONFIG_SPL_USBETH_SUPPORT) += drivers/net/phy/
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libs-$(CONFIG_SPL_MUSB_NEW_SUPPORT) += drivers/usb/musb-new/
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libs-$(CONFIG_SPL_USBETH_SUPPORT) += drivers/usb/gadget/
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libs-$(CONFIG_SPL_WATCHDOG_SUPPORT) += drivers/watchdog/
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libs-$(CONFIG_SPL_USB_HOST_SUPPORT) += drivers/usb/host/
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libs-$(CONFIG_OMAP_USB_PHY) += drivers/usb/phy/
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libs-$(CONFIG_SPL_SATA_SUPPORT) += drivers/block/
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ifneq (,$(CONFIG_MX23)$(CONFIG_MX35)$(filter $(SOC), mx25 mx27 mx5 mx6 mx31 mx35))
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libs-y += arch/$(ARCH)/imx-common/
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endif
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libs-$(CONFIG_ARM) += arch/arm/cpu/
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libs-$(CONFIG_PPC) += arch/powerpc/cpu/
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head-y := $(addprefix $(obj)/,$(head-y))
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libs-y := $(addprefix $(obj)/,$(libs-y))
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u-boot-spl-dirs := $(patsubst %/,%,$(filter %/, $(libs-y)))
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libs-y := $(patsubst %/, %/built-in.o, $(libs-y))
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# Add GCC lib
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ifeq ($(CONFIG_USE_PRIVATE_LIBGCC),y)
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PLATFORM_LIBGCC = arch/$(ARCH)/lib/lib.a
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PLATFORM_LIBS := $(filter-out %/lib.a, $(filter-out -lgcc, $(PLATFORM_LIBS))) $(PLATFORM_LIBGCC)
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endif
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u-boot-spl-init := $(head-y)
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u-boot-spl-main := $(libs-y)
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# Linker Script
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ifdef CONFIG_SPL_LDSCRIPT
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# need to strip off double quotes
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LDSCRIPT := $(addprefix $(SRCTREE)/,$(CONFIG_SPL_LDSCRIPT:"%"=%))
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endif
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ifeq ($(wildcard $(LDSCRIPT)),)
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LDSCRIPT := $(TOPDIR)/board/$(BOARDDIR)/u-boot-spl.lds
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endif
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ifeq ($(wildcard $(LDSCRIPT)),)
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LDSCRIPT := $(TOPDIR)/$(CPUDIR)/u-boot-spl.lds
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endif
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ifeq ($(wildcard $(LDSCRIPT)),)
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LDSCRIPT := $(TOPDIR)/arch/$(ARCH)/cpu/u-boot-spl.lds
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endif
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ifeq ($(wildcard $(LDSCRIPT)),)
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$(error could not find linker script)
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endif
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# Special flags for CPP when processing the linker script.
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# Pass the version down so we can handle backwards compatibility
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# on the fly.
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LDPPFLAGS += \
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-include $(TOPDIR)/include/u-boot/u-boot.lds.h \
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-include $(OBJTREE)/include/config.h \
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-DCPUDIR=$(CPUDIR) \
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$(shell $(LD) --version | \
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sed -ne 's/GNU ld version \([0-9][0-9]*\)\.\([0-9][0-9]*\).*/-DLD_MAJOR=\1 -DLD_MINOR=\2/p')
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quiet_cmd_mkimage = UIMAGE $@
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cmd_mkimage = $(objtree)/tools/mkimage $(MKIMAGEFLAGS_$(@F)) -d $< $@ \
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$(if $(KBUILD_VERBOSE:1=), >/dev/null)
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MKIMAGEFLAGS_MLO = -T omapimage -a $(CONFIG_SPL_TEXT_BASE)
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MKIMAGEFLAGS_MLO.byteswap = -T omapimage -n byteswap -a $(CONFIG_SPL_TEXT_BASE)
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MLO MLO.byteswap: $(obj)/u-boot-spl.bin
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$(call if_changed,mkimage)
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ALL-y += $(obj)/$(SPL_BIN).bin
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ifdef CONFIG_SAMSUNG
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ALL-y += $(obj)/$(BOARD)-spl.bin
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endif
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all: $(ALL-y)
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ifdef CONFIG_SAMSUNG
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ifdef CONFIG_VAR_SIZE_SPL
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VAR_SIZE_PARAM = --vs
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else
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VAR_SIZE_PARAM =
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endif
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$(obj)/$(BOARD)-spl.bin: $(obj)/u-boot-spl.bin
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$(if $(wildcard $(OBJTREE)/spl/board/samsung/$(BOARD)/tools/mk$(BOARD)spl),\
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$(OBJTREE)/spl/board/samsung/$(BOARD)/tools/mk$(BOARD)spl,\
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$(OBJTREE)/tools/mkexynosspl) $(VAR_SIZE_PARAM) $< $@
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endif
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quiet_cmd_objcopy = OBJCOPY $@
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cmd_objcopy = $(OBJCOPY) $(OBJCOPYFLAGS) $(OBJCOPYFLAGS_$(@F)) $< $@
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OBJCOPYFLAGS_$(SPL_BIN).bin = $(SPL_OBJCFLAGS) -O binary
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$(obj)/$(SPL_BIN).bin: $(obj)/$(SPL_BIN) FORCE
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$(call if_changed,objcopy)
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LDFLAGS_$(SPL_BIN) += -T u-boot-spl.lds $(LDFLAGS_FINAL)
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ifneq ($(CONFIG_SPL_TEXT_BASE),)
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LDFLAGS_$(SPL_BIN) += -Ttext $(CONFIG_SPL_TEXT_BASE)
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endif
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quiet_cmd_u-boot-spl = LD $@
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cmd_u-boot-spl = cd $(obj) && $(LD) $(LDFLAGS) $(LDFLAGS_$(@F)) \
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$(patsubst $(obj)/%,%,$(u-boot-spl-init)) --start-group \
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$(patsubst $(obj)/%,%,$(u-boot-spl-main)) --end-group \
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$(PLATFORM_LIBS) -Map $(SPL_BIN).map -o $(SPL_BIN)
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$(obj)/$(SPL_BIN): $(u-boot-spl-init) $(u-boot-spl-main) $(obj)/u-boot-spl.lds
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$(call cmd,u-boot-spl)
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$(sort $(u-boot-spl-init) $(u-boot-spl-main)): $(u-boot-spl-dirs) ;
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PHONY += $(u-boot-spl-dirs)
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$(u-boot-spl-dirs):
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$(Q)$(MAKE) $(build)=$@
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quiet_cmd_cpp_lds = LDS $@
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cmd_cpp_lds = $(CPP) $(cpp_flags) $(LDPPFLAGS) -ansi -D__ASSEMBLY__ \
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-x assembler-with-cpp -P -o $@ $<
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$(obj)/u-boot-spl.lds: $(LDSCRIPT) FORCE
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$(call if_changed,cpp_lds)
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# read all saved command lines
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targets := $(wildcard $(sort $(targets)))
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cmd_files := $(wildcard $(obj)/.*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
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ifneq ($(cmd_files),)
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$(cmd_files): ; # Do not try to update included dependency files
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include $(cmd_files)
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endif
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PHONY += FORCE
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FORCE:
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# Declare the contents of the .PHONY variable as phony. We keep that
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# information in a variable so we can use it in if_changed and friends.
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.PHONY: $(PHONY)
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