阅读uboot

下面是一个执行make XXX_config后的打印信息:

pengdl@debian:~/work/costdown/new/Hi3520D_SDK_V1.0.2.2c/source/arm11/u-boot-2010.06$ make ARCH=arm CROSS_COMPILE=arm-hisiv100nptl-linux- hi3520d_config
Generating include/autoconf.mk
Generating include/autoconf.mk.dep
# Target Architecture CPU Board [VENDOR] [SOC]
'$#' =
'$0' = /home/pengdl/work/costdown/new/Hi3520D_SDK_V1.0.2.2c/source/arm11/u-boot-2010.06/mkconfig
'$1' = hi3520d (Target)
'$2' = arm (Architecture)
'$3' = hi3520d (CPU)
'$4' = hi3520d (Board)
'$5' = NULL (VENDOR)
'$6' = hi3520d (SOC)
BOARD_NAME = hi3520d
/home/pengdl/work/costdown/new/Hi3520D_SDK_V1.0.2.2c/source/arm11/u-boot-2010.06
Configuring for hi3520d board...
SRCTREE = /home/pengdl/work/costdown/new/Hi3520D_SDK_V1.0.2.2c/source/arm11/u-boot-2010.06
OBJTREE = /home/pengdl/work/costdown/new/Hi3520D_SDK_V1.0.2.2c/source/arm11/u-boot-2010.06
ln -s ../arch/arm/include/asm asm
/home/pengdl/work/costdown/new/Hi3520D_SDK_V1.0.2.2c/source/arm11/u-boot-2010.06/include
ln -s arch-hi3520d asm/arch
ln -s proc-armv asm/proc
ARCH = arm > config.mk
CPU = hi3520d >> config.mk
BOARD = hi3520d >> config.mk
SOC = hi3520d >> config.mk
BOARDDIR = hi3520d
/home/pengdl/work/costdown/new/Hi3520D_SDK_V1.0.2.2c/source/arm11/u-boot-2010.06/include

下面是mkconfig的代码:

#!/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) - DENX Software Engineering, Wolfgang Denk <wd@denx.de>
# APPEND=no # Default: Create new config file
BOARD_NAME="" # Name to print in make output
TARGETS="" while [ $# -gt ] ; do
case "$1" in
--) shift ; break ;;
-a) shift ; APPEND=yes ;;
-n) shift ; BOARD_NAME="${1%%_config}" ; shift ;;
-t) shift ; TARGETS="`echo $1 | sed 's:_: :g'` ${TARGETS}" ; shift ;;
*) break ;;
esac
done echo "# Target Architecture CPU Board [VENDOR] [SOC]"
echo "'\$#' = $#"
echo "'\$0' = $0"
echo "'\$1' = $1 (Target)"
echo "'\$2' = $2 (Architecture)"
echo "'\$3' = $3 (CPU)"
echo "'\$4' = $4 (Board)"
echo "'\$5' = $5 (VENDOR)"
echo "'\$6' = $6 (SOC)" [ "${BOARD_NAME}" ] || BOARD_NAME="$1" [ $# -lt ] && exit
[ $# -gt ] && exit if [ "${ARCH}" -a "${ARCH}" != "$2" ]; then
echo "Failed: \$ARCH=${ARCH}, should be '$2' for ${BOARD_NAME}" >&
exit
fi
echo "BOARD_NAME = $BOARD_NAME"
echo "`pwd`"
echo "Configuring for ${BOARD_NAME} board..." #
# Create link to architecture specific headers
#
echo "SRCTREE = $SRCTREE"
echo "OBJTREE = $OBJTREE"
if [ "$SRCTREE" != "$OBJTREE" ] ; then
mkdir -p ${OBJTREE}/include
mkdir -p ${OBJTREE}/include2
cd ${OBJTREE}/include2
rm -f asm
ln -s ${SRCTREE}/arch/$/include/asm asm
LNPREFIX=${SRCTREE}/arch/$/include/asm/
cd ../include
rm -f asm
ln -s ${SRCTREE}/arch/$/include/asm asm
else
cd ./include
rm -f asm
echo "ln -s ../arch/$2/include/asm asm"
ln -s ../arch/$/include/asm asm
fi echo "`pwd`"
rm -f asm/arch if [ -z "$6" -o "$6" = "NULL" ] ; then
echo "ln -s ${LNPREFIX}arch-$3 asm/arch"
ln -s ${LNPREFIX}arch-$ asm/arch
else
echo "ln -s ${LNPREFIX}arch-$6 asm/arch"
ln -s ${LNPREFIX}arch-$ asm/arch
fi if [ "$2" = "arm" ] ; then
rm -f asm/proc
echo "ln -s ${LNPREFIX}proc-armv asm/proc"
ln -s ${LNPREFIX}proc-armv asm/proc
fi #
# Create include file for Make
#
echo "ARCH = $2 > config.mk"
echo "ARCH = $2" > config.mk echo "CPU = $3 >> config.mk"
echo "CPU = $3" >> config.mk echo "BOARD = $4 >> config.mk"
echo "BOARD = $4" >> config.mk [ "$5" ] && [ "$5" != "NULL" ] && echo "VENDOR = $5" >> config.mk && echo "VENDOR = $5 >> config.mk" [ "$6" ] && [ "$6" != "NULL" ] && echo "SOC = $6" >> config.mk && echo "SOC = $6 >> config.mk" # Assign board directory to BOARDIR variable
if [ -z "$5" -o "$5" = "NULL" ] ; then
BOARDDIR=$
else
BOARDDIR=$/$
fi echo "BOARDDIR = $BOARDDIR" #
# Create board specific header file
#
echo "`pwd`"
if [ "$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 ${TARGETS} ; do
echo "#define CONFIG_MK_${i} 1" >>config.h ;
done cat << EOF >> config.h
#define CONFIG_BOARDDIR board/$BOARDDIR
#include <config_defaults.h>
#include <configs/$.h>
#include <asm/config.h>
EOF exit

  • 如何知道自己的板子用的是哪个串口驱动?

include/configs/Target.h(Target 是传给mkconfig的第一个参数,即$1)中定义了大量的宏,在其中搜索serial,可以找到相关的宏,然后到driver/serial/Makefile中看调用的是哪个C文件,或者直接看driver/serial/下有哪个C文件参见了编译即可。

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