Hi3559AV100制作ext4檔案系統和燒錄emmc

1、首先生成所需檔案系統，見本部落格<Hi3559AV100檔案系統制作cramfs>。

2、使用工具生成EXT4檔案系統

       ./make_ext4fs -s -l 96M rootfs_hi3559av100.ext4 ./rootfs

3、燒錄檔案系統

      mw.b 0x82000000 ff 0x12C00000;tftp 0x82000000 STM_ROOTFS_T19022801

      mmc erase A800 96000; mmc write.ext4sp 0 0x82000000 A800 96000

       注意：燒寫EXT4檔案系統時候必須用mmc write.ext4sp 而不是mmc write，否則會報找不到檔案系統錯誤。

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)