Hi,
On 11/18/24 10:19 PM, Uy Ha via lists.yoctoproject.org wrote:
Or you can boot your system not using eMMC (external USB, network
TFTP/NFS, ...) and then use bmaptool on your target to flash the eMMC.
I am trying this approach now. I created a bootable USB (well, theoretically
bootable, I haven't actually managed to boot from it) using `bmaptool`.
However, I am not sure how to boot from it from the U-Boot console. I tried
loading the `fitImage` in the /boot and run `bootm` to boot (I am just trying
random things at this point, I am not really sure what I am doing) but the
kernel panics.
The steps I have done:
* Run: `usb start`
* Load the `fitImage` into memory: `load usb 0:1 $loadaddr /boot/fitImage`
* Boot: `bootm`
Then the kernel panics with the following error message
/dev/root: Can't open blockdev
VFS: Cannot open root device "(null)" or unknown-block(0,0): error -6
Please append a correct "root=" boot option; here are the available
partitions:
0100 65536 ram0
(driver?)
0101 65536 ram1
(driver?)
0102 65536 ram2
(driver?)
0103 65536 ram3
(driver?)
0104 65536 ram4
(driver?)
0105 65536 ram5
(driver?)
0106 65536 ram6
(driver?)
0107 65536 ram7
(driver?)
0108 65536 ram8
(driver?)
0109 65536 ram9
(driver?)
010a 65536 ram10
(driver?)
010b 65536 ram11
(driver?)
010c 65536 ram12
(driver?)
010d 65536 ram13
(driver?)
010e 65536 ram14
(driver?)
010f 65536 ram15
(driver?)
b300 7634944 mmcblk2
driver: mmcblk
b301 134010 mmcblk2p1 076c4a2a-01
b302 7496704 mmcblk2p2 076c4a2a-02
b308 4096 mmcblk2boot0
(driver?)
b310 4096 mmcblk2boot1
(driver?)
Kernel panic - not syncing: VFS: Unable to mount root fs on
unknown-block(0,0)
What am I missing here?
You are missing a rootfs. Usually passed via bootargs with root= or as
an initramfs if part of the fitimage configuration that is used by default.
Cheers,
Quentin
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