u-boot学习笔记二(脚本)

上一篇对u-boot的makefile做了一个大概的分析，提到了一些脚本！这篇对脚本mkconfig做一个大概的分析，本人看u-boot才两天有余，望大家批评指正！

while [ $# -gt 0 ] ; do
 case "$1" in
 --) shift ; break ;;
 -a) shift ; APPEND=yes ;;
 *)  break ;;
 esac
done

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

这事是对参数的检查，如果第一个参数为--或者-a则左移一个参数！并且保证参数在4-6之间！

cd ./include

#
# Create link to architecture specific headers
#
rm -f asm
ln -s asm-$2 asm
rm -f asm-$2/arch

if [ -z "$6" -o "$6" = "NULL" ] ; then
 ln -s arch-$3 asm-$2/arch
else
 ln -s arch-$6 asm-$2/arch
fi

if [ "$2" = "arm" ] ; then
 rm -f asm-$2/proc
 ln -s proc-armv asm-$2/proc
fi
进入include目录，根据传入的参数做一些文件的链接

#
# Create include file for Make
#
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

#
# Create board specific header file
#
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

exit 0
根据参数生成两个文件即config,mk和config.h

到此为止，下面将正式对u-boot源码做大概的分析！