u-boot 2013.04-rc1移植（2）

模板建立

原生u-boot里面支持了很多种的架构的mcu，但并没有对s3c6410进行适配，需要参考已有的s3c6400相关文件，对源码进行修改，增加对6410的支持。

1、将下载好的u-boot-2013.04.tar.bz2解压，里面包含如下信息

eric@eric-PC:~/Documents/u-boot-2013.04-rc1$ ls
api         config.mk  drivers    include      mkconfig  rules.mk
arch        COPYING    dts        lib          nand_spl  snapshot.commit
board       CREDITS    examples   MAINTAINERS  net       spl
boards.cfg  disk       fs         MAKEALL      post      test
common      doc        helper.mk  Makefile     README    tools

2、修改顶层Makefile，将所有6400，替换成6410。

smdk6410_noUSB_config   \
smdk6410_config :   unconfig
@mkdir -p $(obj)include $(obj)board/samsung/smdk6410
@mkdir -p $(obj)nand_spl/board/samsung/smdk6410
@echo "#define CONFIG_NAND_U_BOOT" > $(obj)include/config.h
@echo "CONFIG_NAND_U_BOOT = y" >> $(obj)include/config.mk
@if [ -z "$(findstring smdk6410_noUSB_config,$@)" ]; then          \
echo "RAM_TEXT = 0x57e00000" >> $(obj)board/samsung/smdk6410/config.tmp;\
else                                        \
echo "RAM_TEXT = 0xc7e00000" >> $(obj)board/samsung/smdk6410/config.tmp;\
fi
@$(MKCONFIG) smdk6410 arm arm1176 smdk6410 samsung s3c64xx
@echo "CONFIG_NAND_U_BOOT = y" >> $(obj)include/config.mk

3、尝试对6410进行配置

eric@eric-PC:~/Documents/u-boot-2013.04-rc1$ make smdk6410_config

warning: Please migrate to boards.cfg.  Failure to do so will
mean removal of your board in the next release.

Configuring for smdk6410 board...
eric@eric-PC:~/Documents/u-boot-2013.04-rc1$

Configuring for smdk6410 board…可以成功配置6410！

4、修改相关文件6400字段为6410，包含以下两种情况

a、文件中含有6400字段替换成6410（包括头文件引用和宏判断、定义）

b、含有6400字段的文件夹，均复制出相应的6410文件夹，包含文件夹中的文件

涉及的文件如下：

1、u-boot-2013.04-rc1/arch/arm/cpu/arm1176/s3c64xx/cpu_init.S

2、u-boot-2013.04-rc1/arch/arm/cpu/arm1176/s3c64xx/Makefile

3、u-boot-2013.04-rc1/arch/arm/cpu/arm1176/s3c64xx/Reset.S

4、u-boot-2013.04-rc1/arch/arm/cpu/arm1176/s3c64xx/speed.c

4、u-boot-2013.04-rc1/arch/arm/cpu/arm1176/s3c64xx/timer.c

5、u-boot-2013.04-rc1/arch/arm/include/asm/arch-s3c64xx/s3c64x0.h

6、u-boot-2013.04-rc1/board/samsung/smdk6410 【添加smdk6410文件夹】

7、u-boot-2013.04-rc1/drivers/mtd/nand/s3c64xx.c

8、u-boot-2013.04-rc1/drivers/usb/host/s3c64xx-hcd.c

9、u-boot-2013.04-rc1/drivers/serial/s3c64xx.c

10、u-boot-2013.04-rc1/include/common.h 【defined(CONFIG_S3C6410) || \】

11、u-boot-2013.04-rc1/drivers/usb/host/ohci-hcd.c 【defined(CONFIG_S3C6410) || \】

5、公共文件夹中添加6410头文件(复制6400.h)

u-boot-2013.04-rc1/arch/arm/include/asm/arch-s3c64xx/s3c6410.h

u-boot-2013.04-rc1/include/configs/smdk6410.h

6、以上修改完成，模板基本已经添加了6410所需的支持。尝试进行编译

...
/usr/local/arm/arm-linux-gcc-4.4.3/bin/.arm-none-linux-gnueabi-ld:u-boot.lds:19: syntax error
Makefile:569: recipe for target 'u-boot' failed
make: *** [u-boot] Error 1
eric@eric-PC:~/Documents/u-boot-2013.04-rc1$

发现第一个错误：u-boot.lds:19: syntax error

语法错误，修改u-boot-2013.04-rc1/board/samsung/smdk6410/u-boot-nand.lds 51,56行（由于文件会随时修改，具体行数会有出入）

. = align(4); —> . = ALIGN(4);

7、再次编译

make[1]: Leaving directory '/home/eric/Documents/u-boot-2013.04-rc1/nand_spl/board/samsung/smdk6410'
Makefile:603: recipe for target 'nand_spl' failed
make: *** [nand_spl] Error 2

第二个错误：Makefile:603: recipe for target ‘nand_spl’ failed

修改： /home/eric/Documents/u-boot-2013.04-rc1/nand_spl/board/samsung/smdk6410/Makefile

34行，添加 crt0.o

SOBJS = start.o cpu_init.o lowlevel_init.o crt0.o ##eric++ crt0.o

71行：添加

$(obj)crt0.S:
@rm -f $@
@ln -s $(TOPDIR)/arch/arm/lib/crt0.S $@

8、再次编译

...
crt0.o: In function `clbss_l':
/home/eric/Documents/u-boot-2013.04-rc1/nand_spl/board/samsung/smdk6410/crt0.S:153: undefined reference to `coloured_LED_init'
/home/eric/Documents/u-boot-2013.04-rc1/nand_spl/board/samsung/smdk6410/crt0.S:154: undefined reference to `red_led_on'
Makefile:59: recipe for target '/home/eric/Documents/u-boot-2013.04-rc1/nand_spl/u-boot-spl' failed
make[1]: *** [/home/eric/Documents/u-boot-2013.04-rc1/nand_spl/u-boot-spl] Error 1
make[1]: Leaving directory '/home/eric/Documents/u-boot-2013.04-rc1/nand_spl/board/samsung/smdk6410'
Makefile:603: recipe for target 'nand_spl' failed
make: *** [nand_spl] Error 2

错误，修复：/home/eric/Documents/u-boot-2013.04-rc1/nand_spl/board/samsung/smdk6410/crt0.c

153行：添加CONFIG_NAND_SPL限制

#ifndef(CONFIG_NAND_SPL)
bl coloured_LED_init
bl red_led_on
#endif

9、再此编译

...
make -C examples/api all
make[1]: Entering directory '/home/eric/Documents/u-boot-2013.04-rc1/examples/api'
make[1]: Nothing to be done for 'all'.
make[1]: Leaving directory '/home/eric/Documents/u-boot-2013.04-rc1/examples/api'
eric@eric-PC:~/Documents/u-boot-2013.04-rc1$

至此，Nothing to be done for ‘all’.所以内容全部编译通过！！！

虽然，编译已经通过，但目前还并不能成功启动开发板，因为底层驱动，如SD卡，NAND falsh等还未进行适配。

8b93