mini2440 u-boot linux 内核启动,移植较新（Linux3.19）内核至mini2440开发板（一）

s3c24xx-nand s3c2440-nand: Tacls=1, 9ns Twrph0=3 29ns, Twrph1=2 19ns

s3c24xx-nand s3c2440-nand: NAND soft ECC

nand: device found, Manufacturer ID: 0xec, Chip ID: 0xda

nand: Samsung NAND 256MiB 3,3V 8-bit

nand: 256 MiB, SLC, erase size: 128 KiB, page size: 2048, OOB size: 64

Creating 5 MTD partitions on "nand":

0x000000000000-0x000000040000 : "supervivi"

__nand_correct_data: uncorrectable ECC error

0x000000040000-0x000000060000 : "param"

ftl_cs: FTL header not found.

0x000000060000-0x000000560000 : "Kernel"

ftl_cs: FTL header not found.

0x000000560000-0x000040560000 : "root"

mtd: partition "root" extends beyond the end of device "nand" -- size truncated to 0xfaa0000

ftl_cs: FTL header not found.

0x000000000000-0x000040000000 : "nand"

mtd: partition "nand" extends beyond the end of device "nand" -- size truncated to 0x10000000

__nand_correct_data: uncorrectable ECC error

发现开发板已经可以识别nand flash的信息，但是打印出如下信息：

ftl_cs: FTL header not found.

解决方法如下：在内核根目录下执行make menuconfig,进入

Device Drivers ->

Memory Technology Devices (MTD) ->

去掉如下选项

<>FTL (Flash Translation Layer) support

<> NFTL (NAND Flash Translation Layer) support

<>INFTL (Inverse NAND Flash Translation Layer) support

保存后重新编译即可。

1.6到目前为止已经完成了对nand flash的支持，但是因为缺少根文件系统，内核依旧无法正常启动。接下去我们将为内核添加对yaffs2的支持。

在终端下执行#git clone git://www.aleph1.co.uk/yaffs2 获取最新的yaffs2源码。同步完后，进入yaffs2目录，执行# ./patch-ker.sh c m 内核源码路径，既可对内核打上yaffs2的补丁。进入内核目录，执行make menuconfig

选择File systems  --->

[*] Miscellaneous filesystems  --->

│       yaffs2 file system support

保存后退出，重新编译，此时会遇到几个错误，因为新版的Linux内核有一些对文件操作的函数进行了修改，我们需要按照错误逐一进行修改。按照错误：

fs/yaffs2/yaffs_vfs.c: In function 'yaffs_readpage_nolock':

fs/yaffs2/yaffs_vfs.c:286: error: 'struct file' has no member named 'f_dentry'

fs/yaffs2/yaffs_vfs.c: In function 'yaffs_hold_space':

fs/yaffs2/yaffs_vfs.c:484: error: 'struct file' has no member named 'f_dentry'

fs/yaffs2/yaffs_vfs.c: In function 'yaffs_release_space':

fs/yaffs2/yaffs_vfs.c:502: error: 'struct file' has no member named 'f_dentry'

fs/yaffs2/yaffs_vfs.c: In function 'yaffs_file_write':

fs/yaffs2/yaffs_vfs.c:594: error: 'struct file' has no member named 'f_dentry'

fs/yaffs2/yaffs_vfs.c:606: error: 'struct file' has no member named 'f_dentry'

fs/yaffs2/yaffs_vfs.c: In function 'yaffs_file_flush':

fs/yaffs2/yaffs_vfs.c:730: error: 'struct file' has no member named 'f_dentry'

fs/yaffs2/yaffs_vfs.c:741: error: too few arguments to function 'yaffs_flush_file'

fs/yaffs2/yaffs_vfs.c: In function 'yaffs_sync_object':

fs/yaffs2/yaffs_vfs.c:771: error: too few arguments to function 'yaffs_flush_file'

fs/yaffs2/yaffs_vfs.c: At top level:

fs/yaffs2/yaffs_vfs.c:781: error: 'generic_file_aio_read' undeclared here (not in a function)

fs/yaffs2/yaffs_vfs.c:782: error: 'generic_file_aio_write' undeclared here (not in a function)

fs/yaffs2/yaffs_vfs.c:787: error: 'generic_file_splice_write' undeclared here (not in a function)

fs/yaffs2/yaffs_vfs.c: In function 'yaffs_iterate':

fs/yaffs2/yaffs_vfs.c:1719: error: 'struct file' has no member named 'f_dentry'

fs/yaffs2/yaffs_vfs.c: In function 'yaffs_flush_inodes':

fs/yaffs2/yaffs_vfs.c:2190: error: too few arguments to function 'yaffs_flush_file'

fs/yaffs2/yaffs_vfs.c: In function 'yaffs_flush_super':

fs/yaffs2/yaffs_vfs.c:2203: error: too few arguments to function 'yaffs_flush_whole_cache'

打开/fs/yaffs2/yaffs_vfs.c,使用替换功能，将代码中的所有f_dentry均替换为f_path.dentry，将所有的yaffs_flush_file(obj, 1, 0);替换为yaffs_flush_file(obj, 1, 0,1);将yaffs_flush_file(obj, 1, datasync);替换为yaffs_flush_file(obj, 1, datasync,1);将yaffs_flush_file(obj, 1, 0);替换为yaffs_flush_file(obj, 1, 0,1);yaffs_flush_whole_cache(dev);替换为yaffs_flush_whole_cache(dev,1);

718行附近

-.read = do_sync_read,

-.write = do_sync_write,

+.read = new_sync_read,

+.write = new_sync_write,

-.aio_read = generic_file_aio_read,

-.aio_write = generic_file_aio_write,

+       .read_iter =generic_file_read_iter,

+       .write_iter =generic_file_write_iter,

-.splice_write = generic_file_splice_write,

+.splice_write = iter_file_splice_write,

保存后重新编译，下载内核至开发板，同时烧录文件系统(为了测试方便，这次我先使用友善提供的制作好的文件系统root_qtopia.img在以后的教程中我们也会制作自己的文件系统)，重启开发板，看到如下引导信息

Starting kernel ...

Booting Linux on physical CPU 0x0

Linux version 3.19.3 (root@ginger-virtual-machine) (gcc version 4.4.3 (ctng-1.6.1) ) #6 Sat Apr 25 13:37:14 CST 2015