uboot配置分析之make100ask24x0_config分析

uboot配置分析之make100ask24x0_config分析

#!/bin/sh -e

# Script to create header files and links to configure
# U-Boot for a specific board.
#
# Parameters:  Target  Architecture  CPU  Board [VENDOR] [SOC]
#
# (C) 2002-2006 DENX Software Engineering, Wolfgang Denk <wd@denx.de>
#

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

#mkconfig 100ask24x0 arm arm920t 100ask24x0 NULL s3c24x0
#判断输入mkconfig的参数有没有--,-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
#如果BOARD_NAME没有定义，则执行BOARD_NAME=$1
[ "${BOARD_NAME}" ] || BOARD_NAME="$1"
#如果输入的参数小于4个或者大于6个，则退出
[ $# -lt 4 ] && exit 1
[ $# -gt 6 ] && exit 1
#打印到控制台
echo "Configuring for ${BOARD_NAME} board..."

#
# Create link to architecture specific headers
#
#BUILD_DIR没有定义，$SRCTREE" != "$OBJTREE 执行else分支
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 && ln -s asm-arm asm
cd ./include
rm -f asm
ln -s asm-$2 asm
fi

rm -f asm-$2/arch
if [ -z "$6" -o "$6" = "NULL" ] ; then #if $6 为空或者NULL,$6不为空或者NULL
ln -s ${LNPREFIX}arch-$3 asm-$2/arch
else
ln -s ${LNPREFIX}arch-$6 asm-$2/arch #LNPREFIX 未定义，ln -s arch-s3c24x0 asm-arm/arch
fi

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

#
# Create include file for Make
#
echo "ARCH   = $2" >  config.mk #creat file /include/config.mk
echo "CPU    = $3" >> config.mk
echo "BOARD  = $4" >> config.mk

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

[ "$6" ] && [ "$6" != "NULL" ] && echo "SOC    = $6" >> config.mk #echo SOC = s3c24x0 >>config.mk

#
#/include/config.mk 的内容如下
#
#ARCH = arm
#CPU  = arm920t
#BOARD = 100ask24x0
#SOC = s3c24x0

#
# Create board specific header file
#
#APPEND = no
if [ "$APPEND" = "yes" ]   # Append to existing config file
then
echo >> config.h
#creat file /include/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
#
#/include/config.h的内容如下
#
#/* Automatically generated - do not edit */
#include <configs/100ask24x0.h>