版权声明：本文为博主原创文章，未经博主允许不得转载。 https://blog.csdn.net/xclshwd/article/details/88013064
1、首先生成所需文件系统，见本博客<Hi3559AV100文件系统制作cramfs>。
2、使用工具生成EXT4文件系统
./make_ext4fs -s -l 96M rootfs_hi3559av100.ext4 ./rootfs
3、烧录文件系统
mw.b 0x82000000 ff 0x12C00000;tftp 0x82000000 STM_ROOTFS_T19022801
mmc erase A800 96000; mmc write.ext4sp 0 0x82000000 A800 96000
注意：烧写EXT4文件系统时候必须用mmc write.ext4sp 而不是mmc write，否则会报找不到文件系统错误。
No filesystem could mount root, tried: ext4
Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(179,3)
CPU: 0 PID: 1 Comm: swapper/0 Not tainted 4.9.37 #2
Hardware name: Hisilicon HI3559AV100 DEMO Board (DT)
Call trace:
[<ffffff8008088de8>] dump_backtrace+0x0/0x198
[<ffffff800808908c>] show_stack+0x14/0x20
[<ffffff8008338424>] dump_stack+0x94/0xb8
[<ffffff800812c324>] panic+0x114/0x264
[<ffffff80088110d8>] mount_block_root+0x29c/0x2b8
[<ffffff8008811288>] mount_root+0x74/0x84
[<ffffff80088113fc>] prepare_namespace+0x164/0x1a0
[<ffffff8008810c78>] kernel_init_freeable+0x1c0/0x1e0
[<ffffff8008642068>] kernel_init+0x10/0x100
[<ffffff8008082ee0>] ret_from_fork+0x10/0x30
Kernel Offset: disabled
Memory Limit: 512 MB
---[ end Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(179,3)4、CONFIG_BOOTARGS配置如下
Kernel command line: mem=512M console=ttyAMA0,115200 clk_ignore_unused rw rootwait root=/dev/mmcblk0p3 rootfstype=ext4blkdevparts=mmcblk0:1M(uboot.bin),20M(kernel),300M(rootfs.ext4),300M(app),10M(param),10M(backup.param),6000M(data)