????? 这段时间学习linux的内核移植。翻阅很多资料才成功进行了内核的移植，下面是对内核总要部分的总结！！！
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基于Tiny?6410的内核移植?（NAND?FLASH?、UBIFS篇）
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一、环境
1、开发板
Tiny6410??NAND:?2G??RAM:?256M??MLC
2、操作系统
Ubuntu10
3、交叉工具编译链
arm-linux-gcc-4.5.1
二、下载内核源码包
linux-2.6.38
三、解压内核
tar??–jxvf??linux-2.6.38.tar.bz2?
我解压的的路径是：?
四、NAND?FLASH移植
1、修改Makefile
?vim??Makefile
?将约191行改为：???
ARCH??????=???arm?
CROSS_COMPILE?????=??arm-linux-????
2、cp??arch/arm/configs/s3c6400_defconfig??.config
???忽略这一步的话，后面会找不到System?Type
3、make??menuconfig
4、添加交叉工具编译链的目录
General?setup??--->
(/opt/FriendlyARM/toolschain/4.5.1/bin/arm-linux-)?Cross-compiler?too
? System?Type??--->
[*]?MINI6410????（其余的可以去掉）
这样编译出来的内核是可以被uboot引导的，然后是增加nand?flash支持
vi?arch/arm/mach-s3c64xx/mach-mini6410.c
第117行
struct?mtd_partition?mini6410_nand_part[]?=?{
{
.name?=?"Bootloader",
.offset?=?0,
.size?=?(4?*?128?*SZ_1K),
.mask_flags?=?MTD_CAP_NANDFLASH,
},
{
.name?=?"Kernel",
.offset?=?(4?*?128?*SZ_1K),
.size?=?(5*SZ_1M)?,
{
.name?=?"File?System",
.offset?=?MTDPART_OFS_APPEND,
.size?=?MTDPART_SIZ_FULL,
}
};?//update?at?2011-8-26?经过测试发现，这里改完后根本不起作用，甚至将整个注释也无妨，估计分区已经固死在后面的s3c_nand_mlc.fo中
拷贝友善光盘的NDND?FLASH?驱动
drivers/mtd/nand/s3c_nand.c
arch/arm/plat-samsung/include/plat/regs-nand.h
drivers/mtd/nand/s3c_nand_mlc.fo
然后修改drivers/mtd/nand/Kconfig和drivers/mtd/nand/Makefile文件
在drivers/mtd/nand/Kconfig??238行增加（注意：进格要用Tab键）
config?MTD_NAND_S3C
tristate?"NAND?Flash?support?for?S3C?SoC"
depends?on?(ARCH_S3C64XX?||?ARCH_S5P64XX?||?ARCH_S5PC1XX)?&&?MTD_NAND
help
This?enables?the?NAND?flash?controller?on?the?S3C.
No?board?specfic?support?is?done?by?this?driver,?each?board
must?advertise?a?platform_device?for?the?driver?to?attach.
config?MTD_NAND_S3C_DEBUG
bool?"S3C?NAND?driver?debug"
depends?on?MTD_NAND_S3C
help
Enable?debugging?of?the?S3C?NAND?driver
configMTD_NAND_S3C_HWECC
bool?"S3C?NAND?Hardware?ECC"
depends?on?MTD_NAND_S3C
help
Enable?the?use?of?the?S3C's?internal?ECC?generator?when
using?NAND.?Early?versions?of?the?chip?have?had?problems?with
incorrect?ECC?generation,?and?if?using?these,?the?default?of
software?ECC?is?preferable.
If?you?lay?down?a?device?with?the?hardware?ECC,?then?you?will
currently?not?be?able?to?switch?to?software,?as?there?is?no
implementation?for?ECC?method?used?by?the?S3C
drivers/mtd/nand/Makefile中20行增加
obj-$(CONFIG_MTD_NAND_S3C)?+=?s3c_nand.o
末尾再增加
S3C_NAND_MLC_SRC?=?$(shell?ls?drivers/mtd/nand/s3c_nand_mlc.c?2>/dev/null)
ifeq?($(S3C_NAND_MLC_SRC),)
obj-$(CONFIG_MTD_NAND_S3C)?+=?s3c_nand_mlc.fo
else
obj-$(CONFIG_MTD_NAND_S3C)?+=?s3c_nand_mlc.o
endif
然后再make?menuconfig
Device?Drivers--->
<*>?Memory?Technology?Device?(MTD)?support?--->
[*]?MTD?partitioning?support
[*]?Command?line?partition?table?parsing
<*>?Direct?char?device?access?to?MTD?devices
<*>?Caching?block?device?access?to?MTD?devices
<*>?NAND?Device?Support?--->
<?>?NAND?Flash?support?for?Samsung?S3C?SoCs?去掉不要选
<*>?NAND?Flash?support?for?S3C?SoC
[*]?S3C?NAND?Hardware?ECC
make?zImage
五、内核添加UBIFS
1、配置内核支持UBIFS
Device?Drivers??--->
<*>?Memory?Technology?Device?(MTD)?support??--->
<*>???Enable?UBI?-?Unsorted?block?images??--->
2、配置MTD支持UBI接口
File?systems??--->
[*]?Miscellaneous?filesystems??--->
<*>???UBIFS?file?system?support
3、make
4、下载测试
只要出现正常内核分区就说明nand?驱动可以用了。
