关于android内核移植到YLP2440开发板

今天学习把android内核交叉编译后移植到YLP2440开发板，下面是一些心得。

1、从http://code.google.com/p/android/downloads/list上下载linux-2.6.25-android-1.0_r1.tar.gz
2、解压到任意目录下，解压命令为tar tar –zxvf linux-2.6.25-android-1.0_r1.tar.gz。
3、解压YLP2440板的交叉编译工具arm-linux-gcc-3.4.1.tar.bz2命令为tar xjvf arm-linux-3.4.1.tar.bz2，将文件解压到用户目录，如/usr/local/arm/下。
4、添加当前路径进入环境变量，命令export PATH=/usr/local/arm/3.4.1/bin:$PATH
5、进入内核文件夹，如cd ~/kernel.git/
6、修改Makefile文件，gedit Makefile，如下
CROSS_COMPILE ?= arm-linux-
7、运行make menuconfig
(1)确保System Type ---> ARM system type ()中的内容为Samsung S3C2410, S3C2412, S3C2413, S3C2440, S3C2442, S3C2443
(2)确保System Type ---> S3C2410 Machines --->SMDK2410/A9M2410被勾选
(3)取消选择与Goldfish相关的内容,如下：
Device Drivers ---> Character devices ---> < > Goldfish TTY Driver
Device Drivers ---> Power supply class support ---> < > Goldfish battery driver (NEW)
Device Drivers ---> Real Time Clock ---> < > GOLDFISH (NEW)
Device Drivers ---> Graphics support ---> Support for frame buffer devices ---> < > Goldfish Framebuffer
device drivers->Graphics support->Console display driver support->[]VGA text console
(4)选择S3C2410 LCD相关的内容
Device Drivers ---> Graphics support ---> Support for frame buffer devices ---> <*> S3C2410 LCD framebuffer support
Device Drivers ---> Graphics support ---> Bootup logo ---> Standard black and white Linux logo
Device Drivers ---> Graphics support ---> Bootup logo ---> Standard 16-color Linux logo
Device Drivers ---> Graphics support ---> Bootup logo ---> Standard 224-color Linux logo
(5) 选中Android内核必须选项
General setup ---> Use full shmem filesystem
General setup ---> Enable Android's Shared Memory Subsystem
System Type ---> Support Thumb user binaries
Device Drivers ---> Android ---> Android log driver
Device Drivers ---> Android ---> <*> Binder IPC Driver
(6) 尽量选中Android内核可选选项
Device Drivers ---> Android ---> RAM buffer console
Device Drivers ---> Android ---> Android timed gpio driver
Device Drivers ---> Android ---> Only allow certain groups to create sockets
(7)退出并保存.config
8、使用命令make zImage生成映像。

出现的一些问题
问题一：
CC arch/arm/kernel/asm-offsets.s
cc1: error: invalid option `abi=aapcs-linux'
make[1]: *** [arch/arm/kernel/asm-offsets.s] Error 1
make: *** [prepare0] Error 2
解决方法：
关闭kernel features -->Use EABI。

问题二：
drivers/video/console/vgacon.c:494: error: `PCIMEM_BASE' undeclared (first use in this function)
drivers/video/console/vgacon.c:494: error: (Each undeclared identifier is reported only once
解决方法：
device drivers->
Graphics support->
Console display driver support->
[ ]VGA text console（取消）

上面一些东西是参考如下的文章
Android在TQ2440开发板上的移植
whizer发表于 2009-5-21 14:22 | 只看该作者
http://www.arm9.org.ru/viewthread.php?tid=6&extra=page%3D1

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