2440 uboot学习笔记-mkconfig

mkconfig
#!/bin/sh -e

# 2019/1/17 韦东山学习笔记
#

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

#mkconfig 100ask24x0 arm arm920t 100ask24x0  NULL s324x0
#	$0			$1	  $2    $3        $4	  $5	 $6


#只要参数个数大于0，检查第一个参数，--，-a，-n,*
while [ $# -gt 0 ] ; do
	case "$1" in
	--) shift ; break ;;
	-a) shift ; APPEND=yes ;;
	-n) shift ; BOARD_NAME="${1%%_config}" ; shift ;;
	*)  break ;;
	esac
done

#BOARD_NAME=100ask24x0
[ "${BOARD_NAME}" ] || BOARD_NAME="$1"

#如果参数个数小于4就退出，如果大于6就退出

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

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

#
# Create link to architecture specific headers
#

#根据makefile，SRCTREE=CURDIR,OBJTREE=CURDIR,CURDIR为当前目录
#执行else，建立asm-arm链接文件
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
	cd ./include
	rm -f asm
	ln -s asm-$2 asm
fi



rm -f asm-$2/arch

#参数6不为空，执行else
#LNPREFIX变量为空，所以相当于arch-s324x0 asm-arm/arch,
#把asm-arm/arch的链接文件指向arch-s324x0
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

#建立链接文件
if [ "$2" = "arm" ] ; then
	rm -f asm-$2/proc
	ln -s ${LNPREFIX}proc-armv asm-$2/proc
fi

#
# Create include file for Make
#

#'>'代表新建文件config.mk,'>>'代表追加
#config.mk内容：
#ARCH   = arm
#CPU    = arm920t
#BOARD  = 100ask24x0 
echo "ARCH   = $2" >  config.mk
echo "CPU    = $3" >> config.mk
echo "BOARD  = $4" >> config.mk

#第5个参数等于NULL，则不追加
#SOC    = s324x0
[ "$5" ] && [ "$5" != "NULL" ] && echo "VENDOR = $5" >> config.mk

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

#
# Create board specific header file
#

#因为APPEND=NO，生成config.h
if [ "$APPEND" = "yes" ]	# Append to existing config file
then
	echo >> config.h
else
	> config.h		# Create new config file
fi

#config.h内容
#/* Automatically generated - do not edit */
##include <configs/100ask24x0.h>

echo "/* Automatically generated - do not edit */" >>config.h
echo "#include <configs/$1.h>" >>config.h

exit 0
2440 uboot学习笔记-mkconfig

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