[yocto] dd to nand flash chip?

[Ed Bartosh]

On Fri, Aug 18, 2017 at 11:40:58AM +0800, Riko wrote:
> Here's the boot messages :
> 
> ===
> 
> VFS: PARTUUID= is invalid.
> Expected PARTUUID=<valid-uuid-id>[/PARTNROFF=%d]
> Disabling rootwait; root= is invalid.
> VFS: Cannot open root device "PARTUUID=" or unknown-block(0,0): error -6

Looks like you have empty PARTUUID in the kernel command line. Which wks
file do you use for this image? Which layers? Can you show your
bootloader config?

> Please append a correct "root=" boot option; here are the available
> partitions:
> 0100            4096 ram0 (driver?)
> 0101            4096 ram1 (driver?)
> 0102            4096 ram2 (driver?)
> 0103            4096 ram3 (driver?)
> 0104            4096 ram4 (driver?)
> 0105            4096 ram5 (driver?)
> 0106            4096 ram6 (driver?)
> 0107            4096 ram7 (driver?)
> 0108            4096 ram8 (driver?)
> 0109            4096 ram9 (driver?)
> 010a            4096 ram10 (driver?)
> 010b            4096 ram11 (driver?)
> 010c            4096 ram12 (driver?)
> 010d            4096 ram13 (driver?)
> 010e            4096 ram14 (driver?)
> 010f            4096 ram15 (driver?)
> b300         3735552 mmcblk1  driver: mmcblk
>   b301           16384 mmcblk1p1 2848be0f-01
>   b302          756704 mmcblk1p2 2848be0f-02
> b310            4096 mmcblk1boot1 (driver?)
> b308            4096 mmcblk1boot0 (driver?)
> VFS: Unable to mount root fs on unknown-block(0,0)
> User configuration error - no valid root filesystem found
> Kernel panic - not syncing: Invalid configuration from end user
> prevents conting
> CPU: 0 PID: 1 Comm: swapper Not tainted 4.8.12-yocto-standard #3
> Hardware name: Generic AM33XX (Flattened Device Tree)
> [<c010f260>] (unwind_backtrace) from [<c010c11c>] (show_stack+0x20/0x24)
> [<c010c11c>] (show_stack) from [<c0493068>] (dump_stack+0x20/0x28)
> [<c0493068>] (dump_stack) from [<c01f20f4>] (panic+0xc0/0x22c)
> [<c01f20f4>] (panic) from [<c0f013ac>] (mount_block_root+0x19c/0x274)
> [<c0f013ac>] (mount_block_root) from [<c0f0163c>] (mount_root+0xd0/0x124)
> [<c0f0163c>] (mount_root) from [<c0f01810>] (prepare_namespace+0x180/0x1c0)
> [<c0f01810>] (prepare_namespace) from [<c0f00f3c>]
> (kernel_init_freeable+0x220/)
> [<c0f00f3c>] (kernel_init_freeable) from [<c0964fb8>]
> (kernel_init+0x18/0x11c)
> [<c0964fb8>] (kernel_init) from [<c01078b8>] (ret_from_fork+0x14/0x3c)
> ---[ end Kernel panic - not syncing: Invalid configuration from end
> user preveng
> 
> =====
> 
> How to fix it ? thanks
> 
> 
> On 17/08/17 22:16, Leonardo Sandoval wrote:
> >On Thu, 2017-08-17 at 18:37 +0800, Riko Ho wrote:
> >>Dear Yocto Team Members，
> >>
> >>I tried to dd *.wic to nand flash but always got kernel panic, it can
> >>not find rootfs
> >>when I dd the same file to sd card, it worked.
> >>
> >from the bootloader command prompt, you may need to change the root
> >kernel parameter and point to the device where the filesystem resides.
> >
> >
> >>I copy only *.wic file to usb drive n dd it.
> >>Do I need the whole directory of images for dd? or I need hddimg?
> >>
> >>Regards,
> >>Riko
> >>
> >
> 
> -- 
> /*****
> Sent By
> Ubuntu 16.04 LTS
> Kernel 4.4.0-92-generic
> Regards,
> Riko H
> *****/
> 
> -- 
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-- 
--
Regards,
Ed