Commit 51148790 authored by Masahiro Yamada's avatar Masahiro Yamada Committed by Tom Rini

kconfig: switch to Kconfig

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: default avatarMasahiro Yamada <yamada.m@jp.panasonic.com>
Acked-by: default avatarSimon Glass <sjg@chromium.org>
parent 4ce99570
......@@ -53,8 +53,6 @@
#
/include/config/
/include/generated/
/include/spl-autoconf.mk
/include/tpl-autoconf.mk
# stgit generated dirs
patches-*
......
......@@ -166,9 +166,6 @@ VPATH := $(srctree)$(if $(KBUILD_EXTMOD),:$(KBUILD_EXTMOD))
export srctree objtree VPATH
MKCONFIG := $(srctree)/mkconfig
export MKCONFIG
# Make sure CDPATH settings don't interfere
unexport CDPATH
......@@ -189,9 +186,6 @@ HOSTOS := $(shell uname -s | tr '[:upper:]' '[:lower:]' | \
export HOSTARCH HOSTOS
# Deal with colliding definitions from tcsh etc.
VENDOR=
#########################################################################
# set default to nothing for native builds
......@@ -199,6 +193,9 @@ ifeq ($(HOSTARCH),$(ARCH))
CROSS_COMPILE ?=
endif
KCONFIG_CONFIG ?= .config
export KCONFIG_CONFIG
# SHELL used by kbuild
CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
else if [ -x /bin/bash ]; then echo /bin/bash; \
......@@ -341,6 +338,7 @@ OBJCOPY = $(CROSS_COMPILE)objcopy
OBJDUMP = $(CROSS_COMPILE)objdump
AWK = awk
PERL = perl
PYTHON = python
DTC = dtc
CHECK = sparse
......@@ -362,7 +360,7 @@ export VERSION PATCHLEVEL SUBLEVEL UBOOTRELEASE UBOOTVERSION
export ARCH CPU BOARD VENDOR SOC CPUDIR BOARDDIR
export CONFIG_SHELL HOSTCC HOSTCFLAGS HOSTLDFLAGS CROSS_COMPILE AS LD CC
export CPP AR NM LDR STRIP OBJCOPY OBJDUMP
export MAKE AWK PERL
export MAKE AWK PERL PYTHON
export HOSTCXX HOSTCXXFLAGS DTC CHECK CHECKFLAGS
export KBUILD_CPPFLAGS NOSTDINC_FLAGS UBOOTINCLUDE OBJCOPYFLAGS LDFLAGS
......@@ -460,31 +458,49 @@ ifeq ($(config-targets),1)
# *config targets only - make sure prerequisites are updated, and descend
# in scripts/kconfig to make the *config target
# Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
# KBUILD_DEFCONFIG may point out an alternative default configuration
# used for 'make defconfig'
KBUILD_DEFCONFIG := sandbox_defconfig
export KBUILD_DEFCONFIG KBUILD_KCONFIG
%_config:: outputmakefile
@$(MKCONFIG) -A $(@:_config=)
config: scripts_basic outputmakefile FORCE
+$(Q)$(PYTHON) $(srctree)/scripts/multiconfig.py $@
%config: scripts_basic outputmakefile FORCE
+$(Q)$(PYTHON) $(srctree)/scripts/multiconfig.py $@
else
# ===========================================================================
# Build targets only - this includes vmlinux, arch specific targets, clean
# targets and others. In general all targets except *config targets.
# load ARCH, BOARD, and CPU configuration
-include include/config.mk
ifeq ($(dot-config),1)
# Read in config
-include include/config/auto.conf
# Read in dependencies to all Kconfig* files, make sure to run
# oldconfig if changes are detected.
-include include/config/auto.conf.cmd
# To avoid any implicit rule to kick in, define an empty command
$(KCONFIG_CONFIG) include/config/auto.conf.cmd: ;
# If .config is newer than include/config/auto.conf, someone tinkered
# with it and forgot to run make oldconfig.
# if auto.conf.cmd is missing then we are probably in a cleaned tree so
# we execute the config step to be sure to catch updated Kconfig files
include/config/%.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd
$(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
-include include/autoconf.mk
-include include/autoconf.mk.dep
# load other configuration
# We want to include arch/$(ARCH)/config.mk only when include/config/auto.conf
# is up-to-date. When we switch to a different board configuration, old CONFIG
# macros are still remaining in include/config/auto.conf. Without the following
# gimmick, wrong config.mk would be included leading nasty warnings/errors.
autoconf_is_current := $(if $(wildcard $(KCONFIG_CONFIG)),$(shell find . \
-path ./include/config/auto.conf -newer $(KCONFIG_CONFIG)))
ifneq ($(autoconf_is_current),)
include $(srctree)/config.mk
ifeq ($(wildcard include/config.mk),)
$(error "System not configured - see README")
endif
# If board code explicitly specified LDSCRIPT or CONFIG_SYS_LDSCRIPT, use
......@@ -513,8 +529,8 @@ ifndef LDSCRIPT
endif
else
# Dummy target needed, because used as prerequisite
include/config/auto.conf: ;
endif # $(dot-config)
KBUILD_CFLAGS += -Os #-fomit-frame-pointer
......@@ -563,7 +579,8 @@ KBUILD_CFLAGS += $(KCFLAGS)
UBOOTINCLUDE := \
-Iinclude \
$(if $(KBUILD_SRC), -I$(srctree)/include) \
-I$(srctree)/arch/$(ARCH)/include
-I$(srctree)/arch/$(ARCH)/include \
-include $(srctree)/include/linux/kconfig.h
NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
CHECKFLAGS += $(NOSTDINC_FLAGS)
......@@ -1024,7 +1041,7 @@ define filechk_uboot.release
endef
# Store (new) UBOOTRELEASE string in include/config/uboot.release
include/config/uboot.release: Makefile FORCE
include/config/uboot.release: include/config/auto.conf FORCE
$(call filechk,uboot.release)
......@@ -1042,8 +1059,8 @@ PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3
# 1) Check that make has not been executed in the kernel src $(srctree)
prepare3: include/config/uboot.release
ifneq ($(KBUILD_SRC),)
@$(kecho) ' Using $(srctree) as source for u-boot'
$(Q)if [ -f $(srctree)/include/config.mk ]; then \
@$(kecho) ' Using $(srctree) as source for U-Boot'
$(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \
echo >&2 " $(srctree) is not clean, please run 'make mrproper'"; \
echo >&2 " in the '$(srctree)' directory.";\
/bin/false; \
......@@ -1053,7 +1070,8 @@ endif
# prepare2 creates a makefile if using a separate output directory
prepare2: prepare3 outputmakefile
prepare1: prepare2 $(version_h) $(timestamp_h)
prepare1: prepare2 $(version_h) $(timestamp_h) \
include/config/auto.conf
ifeq ($(__HAVE_ARCH_GENERIC_BOARD),)
ifeq ($(CONFIG_SYS_GENERIC_BOARD),y)
@echo >&2 " Your architecture does not support generic board."
......@@ -1095,29 +1113,6 @@ $(version_h): include/config/uboot.release FORCE
$(timestamp_h): $(srctree)/Makefile FORCE
$(call filechk,timestamp.h)
#
# Auto-generate the autoconf.mk file (which is included by all makefiles)
#
# This target actually generates 2 files; autoconf.mk and autoconf.mk.dep.
# the dep file is only include in this top level makefile to determine when
# to regenerate the autoconf.mk file.
quiet_cmd_autoconf_dep = GEN $@
cmd_autoconf_dep = $(CC) -x c -DDO_DEPS_ONLY -M $(c_flags) \
-MQ include/autoconf.mk $(srctree)/include/common.h > $@ || rm $@
include/autoconf.mk.dep: include/config.h include/common.h
$(call cmd,autoconf_dep)
quiet_cmd_autoconf = GEN $@
cmd_autoconf = \
$(CPP) $(c_flags) -DDO_DEPS_ONLY -dM $(srctree)/include/common.h > $@.tmp && \
sed -n -f $(srctree)/tools/scripts/define2mk.sed $@.tmp > $@; \
rm $@.tmp
include/autoconf.mk: include/config.h
$(call cmd,autoconf)
# ---------------------------------------------------------------------------
PHONY += depend dep
......@@ -1141,7 +1136,7 @@ spl/sunxi-spl.bin: spl/u-boot-spl
@:
tpl/u-boot-tpl.bin: tools prepare
$(Q)$(MAKE) obj=tpl -f $(srctree)/scripts/Makefile.spl all CONFIG_TPL_BUILD=y
$(Q)$(MAKE) obj=tpl -f $(srctree)/scripts/Makefile.spl all
TAG_SUBDIRS := $(patsubst %,$(srctree)/%,$(u-boot-dirs) include)
......@@ -1216,20 +1211,18 @@ include/license.h: tools/bin2header COPYING
# Directories & files removed with 'make clean'
CLEAN_DIRS += $(MODVERDIR)
CLEAN_FILES += u-boot.lds include/bmp_logo.h include/bmp_logo_data.h \
include/autoconf.mk* include/spl-autoconf.mk \
include/tpl-autoconf.mk
CLEAN_FILES += u-boot.lds include/bmp_logo.h include/bmp_logo_data.h
# Directories & files removed with 'make clobber'
CLOBBER_DIRS += spl tpl
CLOBBER_DIRS += $(foreach d, spl tpl, $(patsubst %,$d/%, \
$(filter-out include, $(shell ls -1 $d 2>/dev/null))))
CLOBBER_FILES += u-boot* MLO* SPL System.map
# Directories & files removed with 'make mrproper'
MRPROPER_DIRS += include/config include/generated \
MRPROPER_DIRS += include/config include/generated spl tpl \
.tmp_objdiff
MRPROPER_FILES += .config .config.old \
ctags etags cscope* GPATH GTAGS GRTAGS GSYMS \
include/config.h include/config.mk
MRPROPER_FILES += .config .config.old include/autoconf.mk* include/config.h \
ctags etags TAGS cscope* GPATH GTAGS GRTAGS GSYMS
# clean - Delete most, but leave enough to build external modules
#
......@@ -1306,10 +1299,9 @@ help:
@echo ' mrproper - Remove all generated files + config + various backup files'
@echo ' distclean - mrproper + remove editor backup and patch files'
@echo ''
# uncomment after adding Kconfig feature
# @echo 'Configuration targets:'
# @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
# @echo ''
@echo 'Configuration targets:'
@$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
@echo ''
@echo 'Other generic targets:'
@echo ' all - Build all necessary images depending on configuration'
@echo ' u-boot - Build the bare u-boot'
......
......@@ -7,14 +7,14 @@
# SPDX-License-Identifier: GPL-2.0+
#
cfg=$(shell grep configs $(objtree)/include/config.h | sed 's/.*<\(configs.*\)>/\1/')
is5208:=$(shell grep CONFIG_M5208 $(srctree)/include/$(cfg))
is5249:=$(shell grep CONFIG_M5249 $(srctree)/include/$(cfg))
is5253:=$(shell grep CONFIG_M5253 $(srctree)/include/$(cfg))
is5271:=$(shell grep CONFIG_M5271 $(srctree)/include/$(cfg))
is5272:=$(shell grep CONFIG_M5272 $(srctree)/include/$(cfg))
is5275:=$(shell grep CONFIG_M5275 $(srctree)/include/$(cfg))
is5282:=$(shell grep CONFIG_M5282 $(srctree)/include/$(cfg))
cfg=$(srctree)/include/configs/$(CONFIG_SYS_CONFIG_NAME:"%"=%).h
is5208:=$(shell grep CONFIG_M5208 $(cfg))
is5249:=$(shell grep CONFIG_M5249 $(cfg))
is5253:=$(shell grep CONFIG_M5253 $(cfg))
is5271:=$(shell grep CONFIG_M5271 $(cfg))
is5272:=$(shell grep CONFIG_M5272 $(cfg))
is5275:=$(shell grep CONFIG_M5275 $(cfg))
is5282:=$(shell grep CONFIG_M5282 $(cfg))
ifneq (,$(findstring CONFIG_M5208,$(is5208)))
PLATFORM_CPPFLAGS += -mcpu=5208
......
......@@ -7,9 +7,9 @@
# SPDX-License-Identifier: GPL-2.0+
#
cfg=$(shell grep configs $(objtree)/include/config.h | sed 's/.*<\(configs.*\)>/\1/')
is5301x:=$(shell grep CONFIG_MCF5301x $(srctree)/include/$(cfg))
is532x:=$(shell grep CONFIG_MCF532x $(srctree)/include/$(cfg))
cfg=$(srctree)/include/configs/$(CONFIG_SYS_CONFIG_NAME:"%"=%).h
is5301x:=$(shell grep CONFIG_MCF5301x $(cfg))
is532x:=$(shell grep CONFIG_MCF532x $(cfg))
ifneq (,$(findstring CONFIG_MCF5301x,$(is5301x)))
PLATFORM_CPPFLAGS += -mcpu=53015 -fPIC
......
......@@ -9,8 +9,8 @@
# SPDX-License-Identifier: GPL-2.0+
#
cfg=$(shell grep configs $(objtree)/include/config.h | sed 's/.*<\(configs.*\)>/\1/')
is5441x:=$(shell grep CONFIG_MCF5441x $(srctree)/include/$(cfg))
cfg=$(srctree)/include/configs/$(CONFIG_SYS_CONFIG_NAME:"%"=%).h
is5441x:=$(shell grep CONFIG_MCF5441x $(cfg))
ifneq (,$(findstring CONFIG_MCF5441x,$(is5441x)))
PLATFORM_CPPFLAGS += -mcpu=54418 -fPIC
......
......@@ -7,8 +7,8 @@
PLATFORM_CPPFLAGS += -DCONFIG_4xx -mstring -msoft-float
cfg=$(shell grep configs $(objtree)/include/config.h | sed 's/.*<\(configs.*\)>/\1/')
is440:=$(shell grep CONFIG_440 $(srctree)/include/$(cfg))
cfg=$(srctree)/include/configs/$(CONFIG_SYS_CONFIG_NAME:"%"=%).h
is440:=$(shell grep CONFIG_440 $(cfg))
ifneq (,$(findstring CONFIG_440,$(is440)))
PLATFORM_CPPFLAGS += -Wa,-m440 -mcpu=440
......
......@@ -20,6 +20,16 @@ LDFLAGS_FINAL :=
OBJCOPYFLAGS :=
#########################################################################
ARCH := $(CONFIG_SYS_ARCH:"%"=%)
CPU := $(CONFIG_SYS_CPU:"%"=%)
BOARD := $(CONFIG_SYS_BOARD:"%"=%)
ifneq ($(CONFIG_SYS_VENDOR),)
VENDOR := $(CONFIG_SYS_VENDOR:"%"=%)
endif
ifneq ($(CONFIG_SYS_SOC),)
SOC := $(CONFIG_SYS_SOC:"%"=%)
endif
# Some architecture config.mk files need to know what CPUDIR is set to,
# so calculate CPUDIR before including ARCH/SOC/CPU config.mk files.
# Check if arch/$ARCH/cpu/$CPU exists, otherwise assume arch/$ARCH/cpu contains
......
......@@ -2,4 +2,3 @@
/bmp_logo.h
/bmp_logo_data.h
/config.h
/config.mk
......@@ -13,4 +13,4 @@ build_docproc: $(obj)/docproc
@:
# Let clean descend into subdirs
subdir- += basic
subdir- += basic kconfig
# This helper makefile is used for creating
# - symbolic links (arch/$ARCH/include/asm/arch
# - include/autoconf.mk, {spl,tpl}/include/autoconf.mk
# - include/config.h
#
# When our migration to Kconfig is done
# (= When we move all CONFIGs from header files to Kconfig)
# this makefile can be deleted.
# obj is "include" or "spl/include" or "tpl/include"
# for non-SPL, SPL, TPL, respectively
include $(obj)/config/auto.conf
include scripts/Kbuild.include
# Need to define CC and CPP again here in case the top Makefile did not
# include config.mk. Some architectures expect CROSS_COMPILE to be defined
# in arch/$(ARCH)/config.mk
CC = $(CROSS_COMPILE)gcc
CPP = $(CC) -E
include config.mk
UBOOTINCLUDE := \
-I$(obj) \
-Iinclude \
$(if $(KBUILD_SRC), -I$(srctree)/include) \
-I$(srctree)/arch/$(ARCH)/include \
-include $(srctree)/include/linux/kconfig.h
c_flags := $(KBUILD_CFLAGS) $(KBUILD_CPPFLAGS) $(PLATFORM_CPPFLAGS) \
$(UBOOTINCLUDE) $(NOSTDINC_FLAGS)
quiet_cmd_autoconf_dep = GEN $@
cmd_autoconf_dep = $(CC) -x c -DDO_DEPS_ONLY -M -MP $(c_flags) \
-MQ include/config/auto.conf $(srctree)/include/common.h > $@ || { \
rm $@; false; \
}
include/autoconf.mk.dep: FORCE
$(call cmd,autoconf_dep)
# We are migrating from board headers to Kconfig little by little.
# In the interim, we use both of
# - include/config/auto.conf (generated by Kconfig)
# - include/autoconf.mk (used in the U-Boot conventional configuration)
# The following rule creates autoconf.mk
# include/config/auto.conf is grepped in order to avoid duplication of the
# same CONFIG macros
quiet_cmd_autoconf = GEN $@
cmd_autoconf = \
$(CPP) $(c_flags) -DDO_DEPS_ONLY -dM $(srctree)/include/common.h > $@.tmp && { \
sed -n -f $(srctree)/tools/scripts/define2mk.sed $@.tmp | \
while read line; do \
if ! grep -q "$${line%=*}=" $(obj)/config/auto.conf; then \
echo "$$line"; \
fi \
done > $@; \
rm $@.tmp; \
} || { \
rm $@.tmp; false; \
}
$(obj)/autoconf.mk: FORCE
$(call cmd,autoconf)
include/autoconf.mk include/autoconf.mk.dep: include/config.h
# include/config.h
# Prior to Kconfig, it was generated by mkconfig. Now it is created here.
define filechk_config_h
(echo "/* Automatically generated - do not edit */"; \
for i in $$(echo $(CONFIG_SYS_EXTRA_OPTIONS) | sed 's/,/ /g'); do \
echo \#define CONFIG_$$i \
| sed '/=/ {s/=/ /;q; } ; { s/$$/ 1/; }'; \
done; \
echo \#define CONFIG_BOARDDIR board/$(if $(VENDOR),$(VENDOR)/)$(BOARD);\
echo \#include \<config_cmd_defaults.h\>; \
echo \#include \<config_defaults.h\>; \
echo \#include \<configs/$(CONFIG_SYS_CONFIG_NAME).h\>; \
echo \#include \<asm/config.h\>; \
echo \#include \<config_fallbacks.h\>; \
echo \#include \<config_uncmd_spl.h\>; )
endef
include/config.h: scripts/Makefile.autoconf create_symlink FORCE
$(call filechk,config_h)
# symbolic links
PHONY += create_symlink
create_symlink:
ifneq ($(KBUILD_SRC),)
$(Q)mkdir -p include/asm
endif
$(Q)ln -fsn $(srctree)/arch/$(ARCH)/include/asm/arch-$(if $(SOC),$(SOC),$(CPU)) \
$(if $(KBUILD_SRC),,arch/$(ARCH)/)include/asm/arch
PHONY += FORCE
FORCE:
.PHONY: $(PHONY)
......@@ -3,14 +3,14 @@
# ==========================================================================
# Modified for U-Boot
ifeq ($(CONFIG_TPL_BUILD),y)
src := $(patsubst tpl/%,%,$(obj))
else
ifeq ($(CONFIG_SPL_BUILD),y)
src := $(patsubst spl/%,%,$(obj))
else
src := $(obj)
endif
prefix := tpl
src := $(patsubst $(prefix)/%,%,$(obj))
ifeq ($(obj),$(src))
prefix := spl
src := $(patsubst $(prefix)/%,%,$(obj))
ifeq ($(obj),$(src))
prefix := .
endif
endif
PHONY := __build
......@@ -40,18 +40,9 @@ subdir-asflags-y :=
subdir-ccflags-y :=
# Read auto.conf if it exists, otherwise ignore
-include include/config/auto.conf
# Added for U-Boot: Load U-Boot configuration
ifeq ($(CONFIG_TPL_BUILD),y)
-include include/tpl-autoconf.mk
else
ifeq ($(CONFIG_SPL_BUILD),y)
-include include/spl-autoconf.mk
else
-include include/autoconf.mk
endif
endif
# Modified for U-Boot
-include $(prefix)/include/config/auto.conf
-include $(prefix)/include/autoconf.mk
include scripts/Kbuild.include
......
......@@ -21,13 +21,10 @@ _dummy := $(shell [ -d $(obj) ] || mkdir -p $(obj))
include $(srctree)/scripts/Kbuild.include
CONFIG_SPL_BUILD := y
export CONFIG_SPL_BUILD
UBOOTINCLUDE := -I$(obj)/include $(UBOOTINCLUDE)
KBUILD_CPPFLAGS += -DCONFIG_SPL_BUILD
ifeq ($(CONFIG_TPL_BUILD),y)
KBUILD_CPPFLAGS += -DCONFIG_TPL_BUILD
endif
-include $(obj)/include/config/auto.conf
-include $(obj)/include/autoconf.mk
ifeq ($(CONFIG_TPL_BUILD),y)
export CONFIG_TPL_BUILD
......@@ -36,14 +33,6 @@ else
SPL_BIN := u-boot-spl
endif
include include/config.mk
ifeq ($(CONFIG_TPL_BUILD),y)
-include include/tpl-autoconf.mk
else
-include include/spl-autoconf.mk
endif
include $(srctree)/config.mk
# Enable garbage collection of un-used sections for SPL
......@@ -53,20 +42,6 @@ LDFLAGS_FINAL += --gc-sections
# FIX ME
cpp_flags := $(KBUILD_CPPFLAGS) $(PLATFORM_CPPFLAGS) $(UBOOTINCLUDE) \
$(NOSTDINC_FLAGS)
c_flags := $(KBUILD_CFLAGS) $(cpp_flags)
# Auto-generate the spl-autoconf.mk file (which is included by all makefiles for SPL)
quiet_cmd_autoconf = GEN $@
cmd_autoconf = \
$(CPP) $(c_flags) -DDO_DEPS_ONLY -dM $(srctree)/include/common.h > $@.tmp && \
sed -n -f $(srctree)/tools/scripts/define2mk.sed $@.tmp > $@; \
rm $@.tmp
include/tpl-autoconf.mk: include/config.h
$(call cmd,autoconf)
include/spl-autoconf.mk: include/config.h
$(call cmd,autoconf)
HAVE_VENDOR_COMMON_LIB = $(if $(wildcard $(srctree)/board/$(VENDOR)/common/Makefile),y,n)
......
......@@ -221,7 +221,11 @@ static void use_config(const char *m, int slen)
define_config(m, slen, hash);
printf(" $(wildcard include/config/");
/* printf(" $(wildcard include/config/"); */
/* modified for U-Boot */
printf(" $(wildcard %sinclude/config/",
strncmp(depfile, "spl/", 4) ?
(strncmp(depfile, "tpl/", 4) ? "" : "tpl/") : "spl/");
for (i = 0; i < slen; i++) {
c = m[i];
if (c == '_')
......
......@@ -951,6 +951,14 @@ int conf_write_autoconf(void)
FILE *out, *tristate, *out_h;
int i;
/*
* Added for U-Boot SPL/TPL
*/
name = getenv("KCONFIG_OBJDIR");
if (name && name[0])
if (chdir(name))
return 1;
sym_clear_all_valid();
file_write_dep("include/config/auto.conf.cmd");
......
#!/usr/bin/env python
#
# Copyright (C) 2014, Masahiro Yamada <yamada.m@jp.panasonic.com>
#
# SPDX-License-Identifier: GPL-2.0+
#
"""
A wrapper script to adjust Kconfig for U-Boot
The biggest difference between Linux Kernel and U-Boot in terms of the
board configuration is that U-Boot has to configure multiple boot images
per board: Normal, SPL, TPL.
We need to expand the functions of Kconfig to handle multiple boot
images.
Instead of touching various parts under the scripts/kconfig/ directory,
pushing necessary adjustments into this single script would be better
for code maintainance. All the make targets related to the configuration
(make %config) should be invoked via this script.
Let's see what is different from the original Kconfig.
- config, menuconfig, etc.
The commands 'make config', 'make menuconfig', etc. are used to create
or modify the .config file, which stores configs for Normal boot image.
The location of the one for SPL, TPL image is spl/.config, tpl/.config,
respectively. Use 'make spl/config', 'make spl/menuconfig', etc.
to create or modify the spl/.config file, which contains configs
for SPL image.
Do likewise for the tpl/.config file.
The generic syntax for SPL, TPL configuration is
'make <target_image>/<config_command>'.
- silentoldconfig
The command 'make silentoldconfig' updates .config, if necessary, and
additionally updates include/generated/autoconf.h and files under
include/configs/ directory. In U-Boot, it should do the same things for
SPL, TPL images for boards supporting them.
Depending on whether CONFIG_SPL, CONFIG_TPL is defined or not,
'make silentoldconfig' iterates three times at most changing the target
directory.
To sum up, 'make silentoldconfig' possibly updates
- .config, include/generated/autoconf.h, include/config/*
- spl/.config, spl/include/generated/autoconf.h, spl/include/config/*
(in case CONFIG_SPL=y)
- tpl/.config, tpl/include/generated/autoconf.h, tpl/include/config/*
(in case CONFIG_TPL=y)
- defconfig, <board>_defconfig
The command 'make <board>_defconfig' creates a new .config based on the
file configs/<board>_defconfig. The command 'make defconfig' is the same
but the difference is it uses the file specified with KBUILD_DEFCONFIG
environment.
We need to create .config, spl/.config, tpl/.config for boards where SPL
and TPL images are supported. One possible solution for that is to have
multiple defconfig files per board, but it would produce duplication
among the defconfigs.
The approach chosen here is to expand the feature and support
conditional definition in defconfig, that is, each line in defconfig
files has the form of:
<condition>:<macro definition>
The '<condition>:' prefix specifies which image the line is valid for.
The '<condition>:' is one of:
None - the line is valid only for Normal image
S: - the line is valid only for SPL image
T: - the line is valid only for TPL image
ST: - the line is valid for SPL and TPL images
+S: - the line is valid for Normal and SPL images
+T: - the line is valid for Normal and TPL images
+ST: - the line is valid for Normal, SPL and SPL images
So, if neither CONFIG_SPL nor CONFIG_TPL is defined, the defconfig file
has no '<condition>:' part and therefore has the same form of that of
Linux Kernel.
In U-Boot, for example, a defconfig file can be written like this:
CONFIG_FOO=100
S:CONFIG_FOO=200
T:CONFIG_FOO=300
ST:CONFIG_BAR=y
+S:CONFIG_BAZ=y
+T:CONFIG_QUX=y
+ST:CONFIG_QUUX=y
The defconfig above is parsed by this script and internally divided into
three temporary defconfig files.
- Temporary defconfig for Normal image
CONFIG_FOO=100
CONFIG_BAZ=y
CONFIG_QUX=y
CONFIG_QUUX=y
- Temporary defconfig for SPL image
CONFIG_FOO=200
CONFIG_BAR=y
CONFIG_BAZ=y
CONFIG_QUUX=y
- Temporary defconfig for TPL image
CONFIG_FOO=300
CONFIG_BAR=y
CONFIG_QUX=y
CONFIG_QUUX=y
They are passed to scripts/kconfig/conf, each is used for generating
.config, spl/.config, tpl/.config, respectively.
- savedefconfig
This is the reverse operation of 'make defconfig'.
If neither CONFIG_SPL nor CONFIG_TPL is defined in the .config file,
it works as 'make savedefconfig' in Linux Kernel: create the minimal set
of config based on the .config and save it into 'defconfig' file.
If CONFIG_SPL or CONFIG_TPL is defined, the common lines among .config,
spl/.config, tpl/.config are coalesced together and output to the file
'defconfig' in the form like:
CONFIG_FOO=100
S:CONFIG_FOO=200
T:CONFIG_FOO=300
ST:CONFIG_BAR=y
+S:CONFIG_BAZ=y
+T:CONFIG_QUX=y
+ST:CONFIG_QUUX=y
This can be used as an input of 'make <board>_defconfig' command.
"""
import errno
import os
import re
import subprocess
import sys
# Constant variables
SUB_IMAGES = ('spl', 'tpl')
IMAGES = ('',) + SUB_IMAGES
SYMBOL_MAP = {'': '+', 'spl': 'S', 'tpl': 'T'}
PATTERN_SYMBOL = re.compile(r'(\+?)(S?)(T?):(.*)')
# Environment variables (should be defined in the top Makefile)
# .get('key', 'default_value') method is useful for standalone testing.
MAKE = os.environ.get('MAKE', 'make')
srctree = os.environ.get('srctree', '.')
KCONFIG_CONFIG = os.environ.get('KCONFIG_CONFIG', '.config')
# Useful shorthand
build = '%s -f %s/scripts/Makefile.build obj=scripts/kconfig %%s' % (MAKE, srctree)
autoconf = '%s -f %s/scripts/Makefile.autoconf obj=%%s %%s' % (MAKE, srctree)
### helper functions ###
def mkdirs(*dirs):
"""Make directories ignoring 'File exists' error."""
for d in dirs:
try:
os.makedirs(d)
except OSError as exception:
# Ignore 'File exists' error
if exception.errno != errno.EEXIST:
raise
def rmfiles(*files):
"""Remove files ignoring 'No such file or directory' error."""
for f in files:
try:
os.remove(f)
except OSError as exception:
# Ignore 'No such file or directory' error
if exception.errno != errno.ENOENT:
raise
def rmdirs(*dirs):
"""Remove directories ignoring 'No such file or directory'
and 'Directory not empty' error.
"""
for d in dirs:
try:
os.rmdir(d)
except OSError as exception:
# Ignore 'No such file or directory'
# and 'Directory not empty' error
if exception.errno != errno.ENOENT and \
exception.errno != errno.ENOTEMPTY:
raise
def error(msg):
"""Output the given argument to stderr and exit with return code 1."""
print >> sys.stderr, msg
sys.exit(1)
def run_command(command, callback_on_error=None):