U-boot for imx8mm Mini Evaluation kit

KJ_Mehta — Tue, 05 Apr 2022 15:27:53 GMT

To track boot-time of U-boot (proper) i am using U-boot's internal bootstage facility which records boot-time for different stages as booting up progress. in imx8mm_evk_defconfig file configured the following parameters.

CONFIG_BOOTSTAGE =y

CONFIG_BOOTSTAGE_REPORT =y

and then built and created flash.bin image. it worked fine and shows the bootstage report in (micro-secs) of different stages.

but, when tried to use bootstage for U-boot SPL it does not give SPL stages time records. it still shows only U-boot (proper) stages time records only and does not include SPL start and SPL end time markings.

the following configurations were done:

CONFIG_SPL_BOOTSTAGE =Y

Moreover, the image failed to flash when BOOTSTAGE_STASH =Y was configured.

it kept resetting the cpu and could not flash (flash.bin) to evk board through uuu-utility for usb serial download.

stash start address - 0x0 { I have doubt here.. what should be stash start address for imx8mm Mini board)

statsh size - 0x1000 (4096)

please clarify and resolve the query.

Re: U-boot for imx8mm Mini Evaluation kit

Zhiming_Liu — Wed, 13 Apr 2022 04:38:32 GMT

Hi @KJ_Mehta

Please refer this AN:

Boot Time Measurements Methodology

i.MX ProcessorsのトピックRe: U-boot for imx8mm Mini Evaluation kit

U-boot for imx8mm Mini Evaluation kit

Re: U-boot for imx8mm Mini Evaluation kit