This commit enables Kconfig.
Going forward, we use Kconfig for the board configuration.
mkconfig will never be used. Nor will include/config.mk be generated.
Kconfig must be adjusted for U-Boot because our situation is
a little more complicated than Linux Kernel.
We have to generate multiple boot images (Normal, SPL, TPL)
from one source tree.
Each image needs its own configuration input.
Usage:
Run "make <board>_defconfig" to do the board configuration.
It will create the .config file and additionally spl/.config, tpl/.config
if SPL, TPL is enabled, respectively.
You can use "make config", "make menuconfig" etc. to create
a new .config or modify the existing one.
Use "make spl/config", "make spl/menuconfig" etc. for spl/.config
and do likewise for tpl/.config file.
The generic syntax of configuration targets for SPL, TPL is:
<target_image>/<config_command>
Here, <target_image> is either 'spl' or 'tpl'
<config_command> is 'config', 'menuconfig', 'xconfig', etc.
When the configuration is done, run "make".
(Or "make <board>_defconfig all" will do the configuration and build
in one time.)
For futher information of how Kconfig works in U-Boot,
please read the comment block of scripts/multiconfig.py.
By the way, there is another item worth remarking here:
coexistence of Kconfig and board herder files.
Prior to Kconfig, we used C headers to define a set of configs.
We expect a very long term to migrate from C headers to Kconfig.
Two different infractructure must coexist in the interim.
In our former configuration scheme, include/autoconf.mk was generated
for use in makefiles.
It is still generated under include/, spl/include/, tpl/include/ directory
for the Normal, SPL, TPL image, respectively.
Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
Acked-by: Simon Glass <sjg@chromium.org>
master
Masahiro Yamada
10 years ago
committed by
Tom Rini
parent
4ce9957029
commit
51148790f2
@ -0,0 +1,100 @@ |
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# This helper makefile is used for creating
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# - symbolic links (arch/$ARCH/include/asm/arch
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# - include/autoconf.mk, {spl,tpl}/include/autoconf.mk
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# - include/config.h
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#
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# When our migration to Kconfig is done
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# (= When we move all CONFIGs from header files to Kconfig)
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# this makefile can be deleted.
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# obj is "include" or "spl/include" or "tpl/include"
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# for non-SPL, SPL, TPL, respectively
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include $(obj)/config/auto.conf |
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include scripts/Kbuild.include |
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# Need to define CC and CPP again here in case the top Makefile did not
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# include config.mk. Some architectures expect CROSS_COMPILE to be defined
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# in arch/$(ARCH)/config.mk
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CC = $(CROSS_COMPILE)gcc
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CPP = $(CC) -E
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include config.mk |
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UBOOTINCLUDE := \
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-I$(obj) \
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-Iinclude \
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$(if $(KBUILD_SRC), -I$(srctree)/include) \
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-I$(srctree)/arch/$(ARCH)/include \
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-include $(srctree)/include/linux/kconfig.h
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c_flags := $(KBUILD_CFLAGS) $(KBUILD_CPPFLAGS) $(PLATFORM_CPPFLAGS) \
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$(UBOOTINCLUDE) $(NOSTDINC_FLAGS)
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quiet_cmd_autoconf_dep = GEN $@
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cmd_autoconf_dep = $(CC) -x c -DDO_DEPS_ONLY -M -MP $(c_flags) \
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-MQ include/config/auto.conf $(srctree)/include/common.h > $@ || { \
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rm $@; false; \
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}
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include/autoconf.mk.dep: FORCE |
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$(call cmd,autoconf_dep)
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# We are migrating from board headers to Kconfig little by little.
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# In the interim, we use both of
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# - include/config/auto.conf (generated by Kconfig)
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# - include/autoconf.mk (used in the U-Boot conventional configuration)
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# The following rule creates autoconf.mk
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# include/config/auto.conf is grepped in order to avoid duplication of the
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# same CONFIG macros
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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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while read line; do \
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if ! grep -q "$${line%=*}=" $(obj)/config/auto.conf; then \
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echo "$$line"; \
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fi \
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done > $@; \
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rm $@.tmp; \
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} || { \
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rm $@.tmp; false; \
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}
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$(obj)/autoconf.mk: FORCE |
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$(call cmd,autoconf)
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include/autoconf.mk include/autoconf.mk.dep: include/config.h |
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# include/config.h
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# Prior to Kconfig, it was generated by mkconfig. Now it is created here.
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define filechk_config_h |
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(echo "/* Automatically generated - do not edit */"; \
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for i in $$(echo $(CONFIG_SYS_EXTRA_OPTIONS) | sed 's/,/ /g'); do \
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echo \#define CONFIG_$$i \
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| sed '/=/ {s/=/ /;q; } ; { s/$$/ 1/; }'; \
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done; \
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echo \#define CONFIG_BOARDDIR board/$(if $(VENDOR),$(VENDOR)/)$(BOARD);\
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echo \#include \<config_cmd_defaults.h\>; \
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echo \#include \<config_defaults.h\>; \
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echo \#include \<configs/$(CONFIG_SYS_CONFIG_NAME).h\>; \
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echo \#include \<asm/config.h\>; \
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echo \#include \<config_fallbacks.h\>; \
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echo \#include \<config_uncmd_spl.h\>; )
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endef |
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include/config.h: scripts/Makefile.autoconf create_symlink FORCE |
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$(call filechk,config_h)
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# symbolic links
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PHONY += create_symlink
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create_symlink: |
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ifneq ($(KBUILD_SRC),) |
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$(Q)mkdir -p include/asm
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endif |
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$(Q)ln -fsn $(srctree)/arch/$(ARCH)/include/asm/arch-$(if $(SOC),$(SOC),$(CPU)) \
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$(if $(KBUILD_SRC),,arch/$(ARCH)/)include/asm/arch
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PHONY += FORCE
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FORCE: |
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.PHONY: $(PHONY) |
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@ -0,0 +1,410 @@ |
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#!/usr/bin/env python |
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# |
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# Copyright (C) 2014, Masahiro Yamada <yamada.m@jp.panasonic.com> |
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# |
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# SPDX-License-Identifier: GPL-2.0+ |
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# |
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""" |
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A wrapper script to adjust Kconfig for U-Boot |
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The biggest difference between Linux Kernel and U-Boot in terms of the |
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board configuration is that U-Boot has to configure multiple boot images |
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per board: Normal, SPL, TPL. |
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We need to expand the functions of Kconfig to handle multiple boot |
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images. |
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Instead of touching various parts under the scripts/kconfig/ directory, |
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pushing necessary adjustments into this single script would be better |
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for code maintainance. All the make targets related to the configuration |
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(make %config) should be invoked via this script. |
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Let's see what is different from the original Kconfig. |
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- config, menuconfig, etc. |
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The commands 'make config', 'make menuconfig', etc. are used to create |
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or modify the .config file, which stores configs for Normal boot image. |
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The location of the one for SPL, TPL image is spl/.config, tpl/.config, |
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respectively. Use 'make spl/config', 'make spl/menuconfig', etc. |
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to create or modify the spl/.config file, which contains configs |
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for SPL image. |
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Do likewise for the tpl/.config file. |
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The generic syntax for SPL, TPL configuration is |
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'make <target_image>/<config_command>'. |
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- silentoldconfig |
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The command 'make silentoldconfig' updates .config, if necessary, and |
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additionally updates include/generated/autoconf.h and files under |
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include/configs/ directory. In U-Boot, it should do the same things for |
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SPL, TPL images for boards supporting them. |
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Depending on whether CONFIG_SPL, CONFIG_TPL is defined or not, |
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'make silentoldconfig' iterates three times at most changing the target |
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directory. |
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|
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To sum up, 'make silentoldconfig' possibly updates |
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- .config, include/generated/autoconf.h, include/config/* |
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- spl/.config, spl/include/generated/autoconf.h, spl/include/config/* |
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(in case CONFIG_SPL=y) |
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- tpl/.config, tpl/include/generated/autoconf.h, tpl/include/config/* |
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(in case CONFIG_TPL=y) |
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- defconfig, <board>_defconfig |
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The command 'make <board>_defconfig' creates a new .config based on the |
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file configs/<board>_defconfig. The command 'make defconfig' is the same |
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but the difference is it uses the file specified with KBUILD_DEFCONFIG |
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environment. |
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|
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We need to create .config, spl/.config, tpl/.config for boards where SPL |
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and TPL images are supported. One possible solution for that is to have |
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multiple defconfig files per board, but it would produce duplication |
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among the defconfigs. |
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The approach chosen here is to expand the feature and support |
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conditional definition in defconfig, that is, each line in defconfig |
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files has the form of: |
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<condition>:<macro definition> |
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The '<condition>:' prefix specifies which image the line is valid for. |
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The '<condition>:' is one of: |
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None - the line is valid only for Normal image |
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S: - the line is valid only for SPL image |
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T: - the line is valid only for TPL image |
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ST: - the line is valid for SPL and TPL images |
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+S: - the line is valid for Normal and SPL images |
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+T: - the line is valid for Normal and TPL images |
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+ST: - the line is valid for Normal, SPL and SPL images |
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So, if neither CONFIG_SPL nor CONFIG_TPL is defined, the defconfig file |
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has no '<condition>:' part and therefore has the same form of that of |
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Linux Kernel. |
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In U-Boot, for example, a defconfig file can be written like this: |
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CONFIG_FOO=100 |
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S:CONFIG_FOO=200 |
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T:CONFIG_FOO=300 |
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ST:CONFIG_BAR=y |
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+S:CONFIG_BAZ=y |
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+T:CONFIG_QUX=y |
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+ST:CONFIG_QUUX=y |
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The defconfig above is parsed by this script and internally divided into |
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three temporary defconfig files. |
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- Temporary defconfig for Normal image |
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CONFIG_FOO=100 |
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CONFIG_BAZ=y |
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CONFIG_QUX=y |
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CONFIG_QUUX=y |
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- Temporary defconfig for SPL image |
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CONFIG_FOO=200 |
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CONFIG_BAR=y |
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CONFIG_BAZ=y |
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CONFIG_QUUX=y |
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- Temporary defconfig for TPL image |
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CONFIG_FOO=300 |
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CONFIG_BAR=y |
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CONFIG_QUX=y |
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CONFIG_QUUX=y |
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They are passed to scripts/kconfig/conf, each is used for generating |
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.config, spl/.config, tpl/.config, respectively. |
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- savedefconfig |
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This is the reverse operation of 'make defconfig'. |
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If neither CONFIG_SPL nor CONFIG_TPL is defined in the .config file, |
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it works as 'make savedefconfig' in Linux Kernel: create the minimal set |
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of config based on the .config and save it into 'defconfig' file. |
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If CONFIG_SPL or CONFIG_TPL is defined, the common lines among .config, |
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spl/.config, tpl/.config are coalesced together and output to the file |
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'defconfig' in the form like: |
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CONFIG_FOO=100 |
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S:CONFIG_FOO=200 |
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T:CONFIG_FOO=300 |
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ST:CONFIG_BAR=y |
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+S:CONFIG_BAZ=y |
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+T:CONFIG_QUX=y |
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+ST:CONFIG_QUUX=y |
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This can be used as an input of 'make <board>_defconfig' command. |
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""" |
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import errno |
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import os |
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import re |
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import subprocess |
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import sys |
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# Constant variables |
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SUB_IMAGES = ('spl', 'tpl') |
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IMAGES = ('',) + SUB_IMAGES |
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SYMBOL_MAP = {'': '+', 'spl': 'S', 'tpl': 'T'} |
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PATTERN_SYMBOL = re.compile(r'(\+?)(S?)(T?):(.*)') |
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# Environment variables (should be defined in the top Makefile) |
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# .get('key', 'default_value') method is useful for standalone testing. |
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MAKE = os.environ.get('MAKE', 'make') |
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srctree = os.environ.get('srctree', '.') |
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KCONFIG_CONFIG = os.environ.get('KCONFIG_CONFIG', '.config') |
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|
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# Useful shorthand |
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build = '%s -f %s/scripts/Makefile.build obj=scripts/kconfig %%s' % (MAKE, srctree) |
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autoconf = '%s -f %s/scripts/Makefile.autoconf obj=%%s %%s' % (MAKE, srctree) |
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|
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### helper functions ### |
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def mkdirs(*dirs): |
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"""Make directories ignoring 'File exists' error.""" |
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for d in dirs: |
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try: |
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os.makedirs(d) |
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except OSError as exception: |
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# Ignore 'File exists' error |
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if exception.errno != errno.EEXIST: |
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raise |
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|
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def rmfiles(*files): |
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"""Remove files ignoring 'No such file or directory' error.""" |
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for f in files: |
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try: |
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os.remove(f) |
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except OSError as exception: |
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# Ignore 'No such file or directory' error |
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if exception.errno != errno.ENOENT: |
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raise |
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|
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def rmdirs(*dirs): |
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"""Remove directories ignoring 'No such file or directory' |
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and 'Directory not empty' error. |
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""" |
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for d in dirs: |
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try: |
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os.rmdir(d) |
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except OSError as exception: |
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# Ignore 'No such file or directory' |
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# and 'Directory not empty' error |
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if exception.errno != errno.ENOENT and \ |
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exception.errno != errno.ENOTEMPTY: |
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raise |
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|
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def error(msg): |
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"""Output the given argument to stderr and exit with return code 1.""" |
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print >> sys.stderr, msg |
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sys.exit(1) |
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|
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def run_command(command, callback_on_error=None): |
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"""Run the given command in a sub-shell (and exit if it fails). |
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|
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Arguments: |
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command: A string of the command |
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callback_on_error: Callback handler invoked just before exit |
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when the command fails (Default=None) |
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""" |
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retcode = subprocess.call(command, shell=True) |
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if retcode: |
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if callback_on_error: |
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callback_on_error() |
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error("'%s' Failed" % command) |
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|
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def run_make_config(cmd, objdir, callback_on_error=None): |
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"""Run the make command in a sub-shell (and exit if it fails). |
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|
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Arguments: |
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cmd: Make target such as 'config', 'menuconfig', 'defconfig', etc. |
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objdir: Target directory where the make command is run. |
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Typically '', 'spl', 'tpl' for Normal, SPL, TPL image, |
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respectively. |
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callback_on_error: Callback handler invoked just before exit |
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when the command fails (Default=None) |
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""" |
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# Linux expects defconfig files in arch/$(SRCARCH)/configs/ directory, |
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# but U-Boot puts them in configs/ directory. |
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# Give SRCARCH=.. to fake scripts/kconfig/Makefile. |
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options = 'SRCARCH=.. KCONFIG_OBJDIR=%s' % objdir |
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if objdir: |
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options += ' KCONFIG_CONFIG=%s/%s' % (objdir, KCONFIG_CONFIG) |
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mkdirs(objdir) |
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run_command(build % cmd + ' ' + options, callback_on_error) |
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|
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def get_enabled_subimages(ignore_error=False): |
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"""Parse .config file to detect if CONFIG_SPL, CONFIG_TPL is enabled |
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and return a tuple of enabled subimages. |
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|
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Arguments: |
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ignore_error: Specify the behavior when '.config' is not found; |
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Raise an exception if this flag is False. |
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Return a null tuple if this flag is True. |
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|
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Returns: |
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A tuple of enabled subimages as follows: |
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() if neither CONFIG_SPL nor CONFIG_TPL is defined |
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('spl',) if CONFIG_SPL is defined but CONFIG_TPL is not |
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('spl', 'tpl') if both CONFIG_SPL and CONFIG_TPL are defined |
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""" |
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enabled = () |
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match_patterns = [ (img, 'CONFIG_' + img.upper() + '=y\n') |
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for img in SUB_IMAGES ] |
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try: |
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f = open(KCONFIG_CONFIG) |
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except IOError as exception: |
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if not ignore_error or exception.errno != errno.ENOENT: |
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raise |
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return enabled |
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with f: |
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for line in f: |
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for img, pattern in match_patterns: |
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if line == pattern: |
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enabled += (img,) |
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return enabled |
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|
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def do_silentoldconfig(cmd): |
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"""Run 'make silentoldconfig' for all the enabled images. |
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|
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Arguments: |
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cmd: should always be a string 'silentoldconfig' |
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""" |
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run_make_config(cmd, '') |
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subimages = get_enabled_subimages() |
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for obj in subimages: |
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mkdirs(os.path.join(obj, 'include', 'config'), |
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os.path.join(obj, 'include', 'generated')) |
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run_make_config(cmd, obj) |
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remove_auto_conf = lambda : rmfiles('include/config/auto.conf') |
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# If the following part failed, include/config/auto.conf should be deleted |
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# so 'make silentoldconfig' will be re-run on the next build. |
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run_command(autoconf % |
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('include', 'include/autoconf.mk include/autoconf.mk.dep'), |
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remove_auto_conf) |
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# include/config.h has been updated after 'make silentoldconfig'. |
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# We need to touch include/config/auto.conf so it gets newer |
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# than include/config.h. |
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# Otherwise, 'make silentoldconfig' would be invoked twice. |
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os.utime('include/config/auto.conf', None) |
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for obj in subimages: |
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run_command(autoconf % (obj + '/include', |
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obj + '/include/autoconf.mk'), |
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remove_auto_conf) |
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|
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def do_tmp_defconfig(output_lines, img): |
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"""Helper function for do_board_defconfig(). |
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|
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Write the defconfig contents into a file '.tmp_defconfig' and |
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invoke 'make .tmp_defconfig'. |
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|
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Arguments: |
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output_lines: A sequence of defconfig lines of each image |
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img: Target image. Typically '', 'spl', 'tpl' for |
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Normal, SPL, TPL images, respectively. |
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""" |
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TMP_DEFCONFIG = '.tmp_defconfig' |
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TMP_DIRS = ('arch', 'configs') |
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defconfig_path = os.path.join('configs', TMP_DEFCONFIG) |
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mkdirs(*TMP_DIRS) |
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with open(defconfig_path, 'w') as f: |
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f.write(''.join(output_lines[img])) |
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cleanup = lambda: (rmfiles(defconfig_path), rmdirs(*TMP_DIRS)) |
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run_make_config(TMP_DEFCONFIG, img, cleanup) |
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cleanup() |
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|
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def do_board_defconfig(cmd): |
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"""Run 'make <board>_defconfig'. |
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|
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Arguments: |
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cmd: should be a string '<board>_defconfig' |
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""" |
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defconfig_path = os.path.join(srctree, 'configs', cmd) |
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output_lines = dict([ (img, []) for img in IMAGES ]) |
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with open(defconfig_path) as f: |
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for line in f: |
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m = PATTERN_SYMBOL.match(line) |
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if m: |
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for idx, img in enumerate(IMAGES): |
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if m.group(idx + 1): |
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output_lines[img].append(m.group(4) + '\n') |
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continue |
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output_lines[''].append(line) |
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do_tmp_defconfig(output_lines, '') |
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for img in get_enabled_subimages(): |
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do_tmp_defconfig(output_lines, img) |
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|
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def do_defconfig(cmd): |
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"""Run 'make defconfig'. |
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|
||||
Arguments: |
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cmd: should always be a string 'defconfig' |
||||
""" |
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KBUILD_DEFCONFIG = os.environ['KBUILD_DEFCONFIG'] |
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print "*** Default configuration is based on '%s'" % KBUILD_DEFCONFIG |
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do_board_defconfig(KBUILD_DEFCONFIG) |
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|
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def do_savedefconfig(cmd): |
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"""Run 'make savedefconfig'. |
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|
||||
Arguments: |
||||
cmd: should always be a string 'savedefconfig' |
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""" |
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DEFCONFIG = 'defconfig' |
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# Continue even if '.config' does not exist |
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subimages = get_enabled_subimages(True) |
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run_make_config(cmd, '') |
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output_lines = [] |
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prefix = {} |
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with open(DEFCONFIG) as f: |
||||
for line in f: |
||||
output_lines.append(line) |
||||
prefix[line] = '+' |
||||
for img in subimages: |
||||
run_make_config(cmd, img) |
||||
unmatched_lines = [] |
||||
with open(DEFCONFIG) as f: |
||||
for line in f: |
||||
if line in output_lines: |
||||
index = output_lines.index(line) |
||||
output_lines[index:index] = unmatched_lines |
||||
unmatched_lines = [] |
||||
prefix[line] += SYMBOL_MAP[img] |
||||
else: |
||||
ummatched_lines.append(line) |
||||
prefix[line] = SYMBOL_MAP[img] |
||||
with open(DEFCONFIG, 'w') as f: |
||||
for line in output_lines: |
||||
if prefix[line] == '+': |
||||
f.write(line) |
||||
else: |
||||
f.write(prefix[line] + ':' + line) |
||||
|
||||
def do_others(cmd): |
||||
"""Run the make command other than 'silentoldconfig', 'defconfig', |
||||
'<board>_defconfig' and 'savedefconfig'. |
||||
|
||||
Arguments: |
||||
cmd: Make target in the form of '<target_image>/<config_command>' |
||||
The field '<target_image>/' is typically empty, 'spl/', 'tpl/' |
||||
for Normal, SPL, TPL images, respectively. |
||||
The field '<config_command>' is make target such as 'config', |
||||
'menuconfig', etc. |
||||
""" |
||||
objdir, _, cmd = cmd.rpartition('/') |
||||
run_make_config(cmd, objdir) |
||||
|
||||
cmd_list = {'silentoldconfig': do_silentoldconfig, |
||||
'defconfig': do_defconfig, |
||||
'savedefconfig': do_savedefconfig} |
||||
|
||||
def main(): |
||||
cmd = sys.argv[1] |
||||
if cmd.endswith('_defconfig'): |
||||
do_board_defconfig(cmd) |
||||
else: |
||||
func = cmd_list.get(cmd, do_others) |
||||
func(cmd) |
||||
|
||||
if __name__ == '__main__': |
||||
main() |
||||
Loading…
Reference in new issue