Uboot配置文件mkconfig分析

mkconfig脚本在主Makefile文件中配置时调用

x210_sd_config :	unconfig
	@$(MKCONFIG) $(@:_config=) arm s5pc11x x210 samsung s5pc110
	@echo "TEXT_BASE = 0xc3e00000" > $(obj)board/samsung/x210/config.mk

在调用脚本时传了6个参数 $#=6， $1=x210_sd，$2=arm，$3=s5pc11x，$4=x210，$5=samsung，$6=s5pc110。

12行，23行代码为BOARD_NAME赋值x210_sd。

BOARD_NAME=""	# Name to print in make output 	#12
[ "${BOARD_NAME}" ] || BOARD_NAME="$1"  	   	#23

25，26行限制参数个数$#大于或等于4，小于或等于6。

[ $# -lt 4 ] && exit 1							#25
[ $# -gt 6 ] && exit 1							#26

33-49行为include文件夹下的asm-$2创建符号链接asm。

if [ "$SRCTREE" != "$OBJTREE" ] ; then			#33
	mkdir -p ${OBJTREE}/include					#34
	mkdir -p ${OBJTREE}/include2				#35
	cd ${OBJTREE}/include2						#36
	rm -f asm									#37
	ln -s ${SRCTREE}/include/asm-$2 asm			#38
	LNPREFIX="../../include2/asm/"				#39
	cd ../include								#40
	rm -rf asm-$2								#41
	rm -f asm									#42
	mkdir asm-$2								#43
	ln -s asm-$2 asm							#44
else											#45
	cd ./include								#46
	rm -f asm									#47
	ln -s asm-$2 asm							#48
fi												#49

SRCTREE与OBJTREE是主Makefile中声明的源码目录与目标文件目录，如果它们不是同一路径，则要单独为OBJTREE生成include文件夹，如果原地编译，则只需进入include文件夹生成软连接即可。注意：接下来所有操作都在include文件夹下进行。

84-89行为$6.h(s5pc110.h)与asm-$2文件夹下arch-$3(arch-s5pc11x)创建软连接regs.h与arch。

if [ "$3" = "s5pc11x" ] ; then					#84
        rm -f regs.h							#85
        ln -s $6.h regs.h						#86
        rm -f asm-$2/arch						#87
        ln -s arch-$3 asm-$2/arch				#88
fi												#89

107-110行为asm-$2文件夹下proc-armv创建软连接proc

if [ "$2" = "arm" ] ; then						#107
	rm -f asm-$2/proc							#108
	ln -s ${LNPREFIX}proc-armv asm-$2/proc		#109
fi												#110

123-129行创建include文件夹下的config.mk文件

echo "ARCH   = $2" >  config.mk
echo "CPU    = $3" >> config.mk
echo "BOARD  = $4" >> config.mk

[ "$5" ] && [ "$5" != "NULL" ] && echo "VENDOR = $5" >> config.mk

[ "$6" ] && [ "$6" != "NULL" ] && echo "SOC    = $6" >> config.mk

134-141行创建config.h，包含头文件include/configs/$1.h。

if [ "$APPEND" = "yes" ]	# Append to existing config file
then
	echo >> config.h
else
	> config.h		# Create new config file
fi
echo "/* Automatically generated - do not edit */" >>config.h
echo "#include <configs/$1.h>" >>config.h

APPEND 变量默认no,即重新创建config.h文件。

Uboot配置文件mkconfig分析

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