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i.mx6ull Bootup With Uncompress Kernel

Question asked by tk cheng on Jan 25, 2018
Latest reply on Jan 28, 2018 by tk cheng

I would like to benchmark the performance of booting using uncompress kernel. I am using yocto guide from NXP and currently my kernel version is 4.9.11. By default, the yocto system generated zImage.


In the yocto build system below path, i found the file name 'Image'



I use uboot-image to convert this file into uImage file with the following command:

uboot-mkimage -A arm -O linux -T kernel -C none -a 80800000 -e 80800000 -n myuImage -d Image uImage


When I boot uImage file, the boot up process stop at 'Starting kernel ...'


My Uboot command as below:

run mmcargs;
run loadfdt;
fatload mmc 1 0x80800000 uImage  (from SD)bootm 0x80800000 - 0x83000000


Console output as below:

17350720 bytes read in 766 ms (21.6 MiB/s)
=> bootm 0x80800000 - 0x83000000
## Booting kernel from Legacy Image at 80800000 ...
   Image Name:   myuImage
   Image Type:   ARM Linux Kernel Image (uncompressed)
   Data Size:    17350656 Bytes = 16.5 MiB
   Load Address: 80800000
   Entry Point:  80800000
   Verifying Checksum ... OK
## Flattened Device Tree blob at 83000000
   Booting using the fdt blob at 0x83000000
   Loading Kernel Image ... OK
   Using Device Tree in place at 83000000, end 8300be5d
Modify /soc/aips-bus@02200000/epdc@0228c000:status disabled
ft_system_setup for mx6

Starting kernel ...