移植uboot2016.09到jz2440v3步骤分享！

说明：这个经验是在参考网上的一些资料的基础上自己一步步摸索出来的，如果嫌看着麻烦，这有补丁，下面是详细过程。
一、创建文件夹及文件
1.tar jxvf u-boot-2016.09.tar.bz2
2.cd ./u-boot-2016.09/board/samsung/
3.cp smdk2410 smdk2440 -rf
4.cd ../../include/configs/
5.cp smdk2410.h smdk2440.h
6.cd ../../configs
7.cp smdk2410_defconfig smdk2440_defconfig

二、修改文件
1. cd ./u-boot-2016.09/board/samsung/smdk2440
有如下文件
Kconfig  lowlevel_init.S  MAINTAINERS  Makefile  smdk2410.c
1.1修改smdk2410.c为smdk2440.c
cp smdk2410.c smdk2440.c
rm smdk2410.c
1.2修改makefile
obj-y    := smdk2410.o
为
obj-y    := smdk2440.o
1.3修改MAINTAINERS文件
SMDK2410 BOARD
M:    David Müller <d.mueller@elsoft.ch>
S:    Maintained
F:    board/samsung/smdk2410/
F:    include/configs/smdk2410.h
F:    configs/smdk2410_defconfig
为
SMDK2440 BOARD
M:    David Müller <d.mueller@elsoft.ch>
S:    Maintained
    F:    board/samsung/smdk2440/
    F:    include/configs/smdk2440.h
    F:    configs/smdk2440_defconfig
1.4修改Kconfig文件
if TARGET_SMDK2410

config SYS_BOARD
    default "smdk2410"

config SYS_VENDOR
    default "samsung"

config SYS_SOC
    default "s3c24x0"

config SYS_CONFIG_NAME
    default "smdk2410"

endif
为
    if TARGET_SMDK2440

config SYS_BOARD
        default "smdk2440"

config SYS_VENDOR
    default "samsung"

config SYS_SOC
    default "s3c24x0"

config SYS_CONFIG_NAME
        default "smdk2440"

endif

2.cd home/book/workspace/u-boot-2016.09/include/configs,修改smdk2440.h

3.cd home/book/workspace/u-boot-2016.09/configs,修改smdk2440_defconfig
CONFIG_ARM=y
    CONFIG_TARGET_SMDK2410=y
CONFIG_BOOTDELAY=5
CONFIG_HUSH_PARSER=y
    CONFIG_SYS_PROMPT="SMDK2410 # "
CONFIG_CMD_USB=y
# CONFIG_CMD_SETEXPR is not set
CONFIG_CMD_DHCP=y
CONFIG_CMD_PING=y
CONFIG_CMD_CACHE=y
CONFIG_CMD_EXT2=y
CONFIG_CMD_FAT=y
CONFIG_USB=y
CONFIG_USB_STORAGE=y
为
CONFIG_ARM=y
    CONFIG_TARGET_SMDK2440=y
CONFIG_BOOTDELAY=5
CONFIG_HUSH_PARSER=y
    CONFIG_SYS_PROMPT="SMDK2440 # "
CONFIG_CMD_USB=y
# CONFIG_CMD_SETEXPR is not set
CONFIG_CMD_DHCP=y
CONFIG_CMD_PING=y
CONFIG_CMD_CACHE=y
CONFIG_CMD_EXT2=y
CONFIG_CMD_FAT=y
CONFIG_USB=y
CONFIG_USB_STORAGE=y

在uboot根目录下执行make smdk2440_defconfig,通过

4.修改uboot根目录下makefile,在文件开头
VERSION = 2016
PATCHLEVEL = 09
SUBLEVEL =
EXTRAVERSION =
NAME =
后面添加两行，变为
VERSION = 2016
PATCHLEVEL = 09
SUBLEVEL =
EXTRAVERSION =
NAME =

ARCH = arm
CROSS_COMPILE = arm-linux-gcc

make时出现错误
CHK     include/config/uboot.release
  CHK     include/generated/version_autogenerated.h
  CHK     include/generated/timestamp_autogenerated.h
  UPD     include/generated/timestamp_autogenerated.h
  CC      lib/asm-offsets.s
cc1: warning: unknown register name: x18
lib/asm-offsets.c:1: error: bad value (armv8-a) for -march= switch
Kbuild:43: recipe for target 'lib/asm-offsets.s' failed
make[1]: *** [lib/asm-offsets.s] Error 1
Makefile:1277: recipe for target 'prepare0' failed
make: *** [prepare0] Error 2

问题出现在smdk2440_defconfig
打开文件smdk2440_defconfig，执行
grep -rl "SMDK2410" ./ 查找当前文件夹下含有'SMDK2410'的文件

./.config.old
./.config
./arch/arm/Kconfig
./arch/arm/include/asm/mach-types.h
./configs/smdk2410_defconfig
./board/samsung/smdk2440/lowlevel_init.S
./board/samsung/smdk2440/smdk2440.c
./board/samsung/smdk2410/MAINTAINERS
./board/samsung/smdk2410/Kconfig
./board/samsung/smdk2410/lowlevel_init.S
./board/samsung/smdk2410/smdk2410.c
./include/configs/smdk2440.h
./include/configs/smdk2410.h
以上文件中含有"SMDK2410"
逐个分析

.config文件
# CONFIG_TARGET_SMDK2410 is not set后添加
# CONFIG_TARGET_SMDK2440 is not set

./arch/arm/Kconfig文件

config TARGET_SMDK2410
    bool "Support smdk2410"
    select CPU_ARM920T   后添加

config TARGET_SMDK2440
    bool "Support smdk2440"
    select CPU_ARM920T

./arch/arm/include/asm/mach-types.h中
有
#define MACH_TYPE_SMDK2410             193
也有
#define MACH_TYPE_S3C2440              362
执行grep -rl "MACH_TYPE_SMDK2410" ./之后
./arch/arm/include/asm/mach-types.h
./board/samsung/smdk2440/smdk2440.c
./board/samsung/smdk2410/smdk2410.c
说明机器码只出现在上述三个文件中，所以在./board/samsung/smdk2440/smdk2440.c中修改机器码
//gd->bd->bi_arch_number = MACH_TYPE_SMDK2410;
gd->bd->bi_arch_number = MACH_TYPE_S3C2440;//./arch/arm/include/asm/mach-types.h   

./configs/smdk2410_defconfig
./board/samsung/smdk2440/lowlevel_init.S
文件中"SMDK2410"为注释
./board/samsung/smdk2440/smdk2440.c
文件中"SMDK2410"有注释，有机器码赋值
./board/samsung/smdk2410/MAINTAINERS
./board/samsung/smdk2410/Kconfig
./board/samsung/smdk2410/lowlevel_init.S
./board/samsung/smdk2410/smdk2410.c
./include/configs/smdk2440.h文件中
改
#define CONFIG_S3C2410        /* specifically a SAMSUNG S3C2410 SoC */
#define CONFIG_SMDK2410        /* on a SAMSUNG SMDK2410 Board */
为
//#define CONFIG_S3C2410        /* specifically a SAMSUNG S3C2410 SoC */
#define CONFIG_S3C2440
//#define CONFIG_SMDK2410        /* on a SAMSUNG SMDK2410 Board */
#define CONFIG_SMDK2440

./include/configs/smdk2410.h

执行make,出现错误
In file included from ./include/common.h:18:
include/config.h:5:22: error: configs/.h: No such file or directory
scripts/Makefile.autoconf:75: recipe for target 'include/autoconf.mk' failed
make[1]: *** [include/autoconf.mk] Error 1
make: *** No rule to make target 'include/config/auto.conf', needed by 'include/config/uboot.release'。 停止。
提示configs/.h: No such file or directory
找到include/config.h，该文件是自动生成的，
执行make smdk2410_defconfig时生成configs/smdk2410.h
执行make smdk2440_defconfig时生成configs/.h。
说明执行make smdk2440_defconfig有错误，上网查找make smdk2410_defconfig的执行过程，make smdk2410_defconfig根据arch/arm/Kconfig里面的source "board/samsung/smdk2410/Kconfig"找到smdk2410的Kconfig进行配置，由此，在arch/arm/Kconfig的source "board/samsung/smdk2410/Kconfig"后面加上source "board/samsung/smdk2440/Kconfig"

执行make,提示错误
  LDS     u-boot.lds
  LD      u-boot
arm-linux-ld:u-boot.lds:1: ignoring invalid character `#' in expression
arm-linux-ld:u-boot.lds:1: syntax error
Makefile:1201: recipe for target 'u-boot' failed
make: *** [u-boot] Error 1
上网搜索
是smdk2440.h文件中宏定义的注释有问题
改
/*#define CONFIG_S3C2410 */        /* specifically a SAMSUNG S3C2410 SoC */
#define CONFIG_S3C2440
/*#define CONFIG_SMDK2410 */    /* on a SAMSUNG SMDK2410 Board */
#define CONFIG_SMDK2440
为

执行make,通过，成功生成u-boot.bin