Linux移植过程中的一些错误

问题点：

1 YAFFS2根文件系统无法挂载

Failed to execute /linuxrc.  Attempting defaults...
Kernel panic - not syncing: No init found.  Try passing init= option to kernel.

原因：mkyaffs2image工具有问题，制作的YAFFS2文件系统不能被内核识别，参考：http://blog.youkuaiyun.com/itismine/article/details/4799770，重新编译支持128M nandflash的YAFFS2文件系统，成功解决。

2,ECC 校验没有关闭

end_request: I/O error, dev mtdblock2, sector 0
Buffer I/O error on device mtdblock2, logical block 0
end_request: I/O error, dev mtdblock2, sector 0
Buffer I/O error on device mtdblock2, logical block 0
end_request: I/O error, dev mtdblock2, sector 8
Buffer I/O error on device mtdblock2, logical block 1
end_request: I/O error, dev mtdblock2, sector 8
Buffer I/O error on device mtdblock2, logical block 1
end_request: I/O error, dev mtdblock2, sector 16
Buffer I/O error on device mtdblock2, logical block 2
end_request: I/O error, dev mtdblock2, sector 16
Buffer I/O error on device mtdblock2, logical block 2
end_request: I/O error, dev mtdblock2, sector 24
Buffer I/O error on device mtdblock2, logical block 3
end_request: I/O error, dev mtdblock2, sector 24
Buffer I/O error on device mtdblock2, logical block 3
end_request: I/O error, dev mtdblock2, sector 0
FAT: unable to read boot sector
VFS: Cannot open root device "mtdblock2" or unknown-block(31,2)
Please append a correct "root=" boot option; here are the available partitions:
1f00      2048 mtdblock0 (driver?)
1f01      8192 mtdblock1 (driver?)
1f02    120832 mtdblock2 (driver?)
Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(31,2)

【原因】：一般是NAND ECC校验错误：内核编译启用了MTD的ECC,文件系统制作过程禁用了的ECC；

【解决】：禁用内核编译时的MTD的ECC：

                   drivers/mtd/nand/s3c2410.c

                   将chip->ecc.mode = NAND_ECC_SOFT;

       改为 chip->ecc.mode = NAND_ECC_NONE;

 

3，  Kernel panic - not syncing: Attempted to kill init!

 【原因】：内核和文件系统编译时选用的配置不一致：一般是文件系统启用了ARM EABI，但内核编译时，未打开此编译选项；

【解决】：make menuconfig

Kernel Features ---> [*] Use the ARM EABI to compile the kernel [*] Allow old ABI binaries to run with this kernel (EXPERIMENTA)