Linux/DM385: bootargs for uncompressed kernel image?

Ganesh Biradar

Part Number: DM385

Tool/software: Linux

Hi Guys,

i'm working on boot optimization, for testing purpose i have to boot my board with uncompressed kernel image. I don't have bootargs for uncompressed image. so can anyone give what kind of bootargs i have to pass.

Uncompressed image size is 3.6MB and RAM is 512MB.

DM385 + IPNC RDK3.5 + 2.6.37 kernel

I tried but i'm getting errors

DM385_IPNC#setenv bootcmd 'ipnc_ff_init 1; mmc rescan 0; fatload mmc 0 0x81000000 image; bootm 0x81000000';saveenv
Saving Environment to MMC...
Writing to MMC(0)... done
DM385_IPNC#boot
Wrong Image Format for bootm command
ERROR: can't get kernel image!

regards,

Ganesh

over 9 years ago

0 Pavel Botev over 9 years ago

TI__Guru**** 170625 points

Hi Ganesh,

To use uncompressed kernel (Image) with u-boot, header has to be placed on Image. You can use mkimage tool. For more details see the below pointers:

processors.wiki.ti.com/.../All_This_For_1_Second_Boot

processors.wiki.ti.com/.../TI81XX_PSP_User_Guide

free-electrons.com/.../

e2e.ti.com/.../441630

Regards,
Pavel

0 Pavel Botev over 9 years ago in reply to Pavel Botev

TI__Guru**** 170625 points

Boot arguments are the same for uImage and Image

0 Ganesh Biradar over 9 years ago in reply to Pavel Botev

Expert 2315 points

Hi Pavel,

thanks for your help, i got what i needed.

One more thing

1-> how to increase throughput of NAND?

2-> How to get rid of barrier problem. as i'm doing boot optimization it is taking time.

[5.120117 0.014021] mmc0: queuing unknown CIS tuple 0x91 (3 bytes)
[5.125470 0.005353] mmc0: new high speed SDIO card at address 0001
[5.202334 0.076864] mmc1: new high speed SDHC card at address 0007
[5.206971 0.004637] mmcblk0: mmc1:0007 SS08G 7.21 GiB
[5.211662 0.004691] mmcblk0: p1 p2
[5.318322 0.106660] EXT3-fs: barriers not enabled
[6.164749 0.846427] kjournald starting. Commit interval 5 seconds
[6.174905 0.010156] EXT3-fs (mmcblk0p2): using internal journal
[6.178715 0.003810] EXT3-fs (mmcblk0p2): recovery complete
[6.195832 0.017117] EXT3-fs (mmcblk0p2): mounted filesystem with writeback data mode
[6.201742 0.005910] VFS: Mounted root (ext3 filesystem) on device 179:2.
[6.210487 0.008745] devtmpfs: mounted
[6.212147 0.001660] Freeing init memory: 188K
[6.312005 0.099858] INIT: version 2.86 booting
[6.479072 0.167067] Please wait: booting...

regards,
Ganesh

0 Pavel Botev over 9 years ago in reply to Ganesh Biradar

TI__Guru**** 170625 points

Ganesh,

These "one more thing" are two questions completely different from the subject of this topic and completely different from each other. What I can suggest you is to create new e2e threads regarding your new questions.

Regards,
Pavel

0 Ganesh Biradar over 9 years ago in reply to Pavel Botev

Expert 2315 points

My mistake pavel, i will create new thread.

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Linux/DM385: bootargs for uncompressed kernel image?