u-boot-1.1.6_s3c2440/mkconfig 阅读

#!/bin/sh -e

#mkconfig 100ask24x0 arm arm920t 100ask24x0 NULL s3c24x0
# Parameters:  Target  Architecture  CPU  Board [VENDOR] [SOC]


APPEND=no # Default: Create new config file
BOARD_NAME="" # Name to print in make output


# 判断传递参数 --，-a，-n
# %%_config 截取从后边_config，
# ${parameter%word} 最小限度从后面截取word
# ${parameter%%word} 最大限度从后面截取word
# ${parameter%%word*} 最大限度从后面截取word
while [ $# -gt 0 ] ; do
case "$1" in
--) shift ; break ;;
-a) shift ; APPEND=yes ;;
-n) shift ; BOARD_NAME="${1%%_config}" ; shift ;;
*)  break ;;
esac
done


# 判断BOARD_NAME是否存在
[ "${BOARD_NAME}" ] || BOARD_NAME="$1"


# 判断传入参数大于4个小于6个
[ $# -lt 4 ] && exit 1
[ $# -gt 6 ] && exit 1


echo "Configuring for ${BOARD_NAME} board..."


#
# Create link to architecture specific headers
# 创建架构的特定头文件
#
# 为include/asm-arm创建链接include/asm
if [ "$SRCTREE" != "$OBJTREE" ] ; then
mkdir -p ${OBJTREE}/include
mkdir -p ${OBJTREE}/include2
cd ${OBJTREE}/include2
rm -f asm
ln -s ${SRCTREE}/include/asm-$2 asm
LNPREFIX="../../include2/asm/"
cd ../include
rm -rf asm-$2
rm -f asm
mkdir asm-$2
ln -s asm-$2 asm
else
# 从此进入了/include目录
cd ./include
rm -f asm
ln -s asm-$2 asm
fi


# LNPREFIX在SRCTREE==OBJTREE时为空
# 创建include/arch-s3c24x0的链接为include/asm-arm/arch
rm -f asm-$2/arch
if [ -z "$6" -o "$6" = "NULL" ] ; then
ln -s ${LNPREFIX}arch-$3 asm-$2/arch
else
ln -s ${LNPREFIX}arch-$6 asm-$2/arch
fi
# 创建include/proc-armv的链接为include/asm-arm/proc
if [ "$2" = "arm" ] ; then
rm -f asm-$2/proc
ln -s ${LNPREFIX}proc-armv asm-$2/proc
fi


#
# Create include file for Make
# 为Makefile创建/include/config.mk
#
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
# 创建/include/config.h
# include <configs/100ask24x0.h>"
# include/configs/100ask24x0.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


exit 0