linux移植遇到的问题

1）yaffs2移植

version:2013
1 unknown type 'u8';
解决方式：在yportenv.h文件中添加 CONFIG_YAFFS_DEFINES_TYPES

1、设置的Machine为OK6410，结果打印的是SMDK6410
答：linux内核配置时选择了多个6410MMU

2、VFS: Cannot open root device "mtdblock2" or unknown-block(0,0)
Please append a correct "root=" boot option; here are the available partitions:
Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(0,0)
答：与正常启动的linux内核相比缺少了nandflah相关的设置：
NAND device: Manufacturer ID: 0xec, Chip ID: 0xd5 (Samsung NAND 2GiB 3,3V 8-bit)
Creating 3 MTD partitions on "NAND 2GiB 3,3V 8-bit":
0x000000000000-0x000000100000 : "Bootloader"
0x000000100000-0x000000600000 : "Kernel"
0x000000600000-0x000080000000 : "File System"
vcan: Virtual CAN interface driver

查看在arch/arm/mach-s3c64xx/mach-ok6410.c 文件中没有对分区的设置

3、No oob scheme defined for oobsize 218
kernel BUG at drivers/mtd/nand/nand_base.c:3262!
临时解决：在nand_base.c中增加对218分支的处理代码.

4、启动根文件系统报错：
Kernel panic - not syncing: No init found.  Try passing init= option to kernel. See Linux Documentation/init.txt for guidance.
答：在uboot下print环境变量:
bootargs=root=/dev/mtdblock2 rootfstype=yaffs2 console=ttySAC0,115200
修改
bootargs=noinitrd root=/dev/mtdblock2 rootfstype=yaffs2 console=ttySAC0,115200 init=/linuxrc

5、mmc0: mmc_rescan_try_freq: trying to init card at 300000 Hz
VFS: Mounted root (yaffs2 filesystem) on device 31:2.
Freeing init memory: 108K
Failed to execute /linuxrc.  Attempting defaults...
Kernel panic - not syncing: No init found.  Try passing init= option to kernel. See Linux Documentation/init.txt for guidance.
[<c002f504>] (unwind_backtrace+0x0/0xf4) from [<c0246a70>] (panic+0x58/0x178)
[<c0246a70>] (panic+0x58/0x178) from [<c002357c>] (init_post+0x7c/0xcc)
[<c002357c>] (init_post+0x7c/0xcc) from [<c0008458>] (kernel_init+0xe8/0x118)
[<c0008458>] (kernel_init+0xe8/0x118) from [<c002a618>] (kernel_thread_exit+0x0/0x8)
答：暂未解决