（1）Makefile配置所传的参数
$1=-A $2=s5p_goni(mkconfig会通过这个参数在boards.cfg中找到与参数相对应的一行)
%_config:: unconfig @$(MKCONFIG) -A $(@:_config=)
（2）解析boards.cfg
（1）#通过正则表达式在boards.cfg中查找与$2=s5p_goni相对应的一行，将对应行的参数赋值到$1到$8
if [ \( $# -eq 2 \) -a \( "$1" = "-A" \) ] ; then
# Automatic mode
line=`awk '($0 !~ /^#/ && $7 ~ /^'"$2"'$/) { print $1, $2, $3, $4, $5, $6, $7, $8 }' boards.cfg`
if [ -z "$line" ] ; then
echo "make: *** No rule to make target \`$2_config'. Stop." >&2
exit 1
fi
set ${line}
# add default board name if needed
[add default board name if needed
[ $# = 3 ] && set ${line} ${1}
fi
（2）boards.cfg中的对应行为 所以$的值为 $1：Active $2：arm $3：armv7 $4：s5pc1xx $5：samsung $6：goni $7：s5p_goni $8：-
（3）
#判断传参个数是否大于0
while [ $# -gt 0 ] ; do
case "$1" in
--) shift ; break ;;
-a) shift ; APPEND=yes ;;
-n) shift ; BOARD_NAME="${7%_config}" ; shift ;;
-t) shift ; TARGETS="`echo $1 | sed 's:_: :g'` ${TARGETS}" ; shift ;;
#如果$1与上面的不匹配就退出
*) break ;;
esac
done
#传参个数是否小于7
[ $# -lt 7 ] && exit 1
#传参个数是否大于8
[ $# -gt 8 ] && exit 1
（4）
#CONFIG_NAM=s5p_goni _config
CONFIG_NAME="${7%_config}"
#如果没有配置名就把配置名设置为s5p_goni _config
[ "${BOARD_NAME}" ] || BOARD_NAME="${7%_config}"
#arch=arm
arch="$2"
#cpu=armv7
cpu=`echo $3 | awk 'BEGIN {FS = ":"} ; {print $1}'`
spl_cpu=`echo $3 | awk 'BEGIN {FS = ":"} ; {print $2}'`
if [ "$6" = "-" ] ; then
board=${BOARD_NAME}
else
#board=goni
board="$6"
fi
#vendor=samsung
[ "$5" != "-" ] && vendor="$5"
#soc=s5pc1xx
[ "$4" != "-" ] && soc="$4"
[ $# -gt 7 ] && [ "$8" != "-" ] && {
# check if we have a board config name in the options field
# the options field mave have a board config name and a list
# of options, both separated by a colon (':'); the options are
# separated by commas (',').
#
# Check for board name
tmp="${8%:*}"
if [ "$tmp" ] ; then
CONFIG_NAME="$tmp"
fi
# Check if we only have a colon...
if [ "${tmp}" != "$8" ] ; then
options=${8#*:}
TARGETS="`echo ${options} | sed 's:,: :g'` ${TARGETS}"
fi
}
配置结果 arch=arm cpu=armv7 soc=s5pc1xx vendor=samsung board=goni
（5）创建符号链接
if [ "$SRCTREE" != "$OBJTREE" ] ; then
mkdir -p ${OBJTREE}/include
mkdir -p ${OBJTREE}/include2
cd ${OBJTREE}/include2
rm -f asm
#在include下创建asm指向arm/include/asm文件
ln -s ${SRCTREE}/arch/${arch}/include/asm asm
LNPREFIX=${SRCTREE}/arch/${arch}/include/asm/
cd ../include
mkdir -p asm
else
cd ./include
rm -f asm
#在include下创建asm指向arm/include/asm文件
ln -s ../arch/${arch}/include/asm asm
fi
rm -f asm/arch
if [ -z "${soc}" ] ; then
#在asm目录下创建arch文件指向arch-arm
ln -s ${LNPREFIX}arch-${cpu} asm/arch
else
ln -s ${LNPREFIX}arch-${soc} asm/arch
fi
if [ "${arch}" = "arm" ] ; then
rm -f asm/proc
#在asm目录下创建proc文件指向proc-armv
ln -s ${LNPREFIX}proc-armv asm/proc
fi
(6)创建config.h和config.mk文件并添加信息
( echo “ARCH =
a
r
c
h
"
i
f
[
!
−
z
"
{arch}" if [ ! -z "
arch"if[!−z"spl_cpu” ] ; then echo ‘ifeq ($(CONFIG_SPL_BUILD),y)’ echo “CPU = ${spl_cpu}” echo “else” echo “CPU = ${cpu}” echo “endif” else echo “CPU = ${cpu}” fi echo “BOARD = ${board}”
[ "${vendor}" ] && echo "VENDOR = ${vendor}"
[ "${soc}" ] && echo "SOC = ${soc}"
exit 0 ) > config.mk
Assign board directory to BOARDIR variable
if [ -z "
v
e
n
d
o
r
"
]
;
t
h
e
n
B
O
A
R
D
D
I
R
=
{vendor}" ] ; then BOARDDIR=
vendor"];thenBOARDDIR={board} else BOARDDIR=
v
e
n
d
o
r
/
{vendor}/
vendor/{board} fi
Create board specific header file
if [ "$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
for i in ${TARGETS} ; do
i="`echo ${i} | sed '/=/ {s/=/ /;q; } ; { s/$/ 1/; }'`"
echo "#define CONFIG_${i}" >>config.h ;
done
echo "#define CONFIG_SYS_ARCH \"${arch}\"" >> config.h
echo "#define CONFIG_SYS_CPU \"${cpu}\"" >> config.h
echo "#define CONFIG_SYS_BOARD \"${board}\"" >> config.h
[ "${vendor}" ] && echo "#define CONFIG_SYS_VENDOR \"${vendor}\"" >> config.h
[ "${soc}" ] && echo "#define CONFIG_SYS_SOC \"${soc}\"" >> config.h
