AM335x sdk 7.00 booting problem.

B V Srikanth Reddy

Intellectual 280 points

Hello,

We are having am335x evm rev 1.5c.

We downloaded ti sdk "ti-sdk-am335x-evm-07.00.00.00-Linux-x86-Install.bin" and installed.

created an sdcard boot from the script "create-sdcard.sh" and tried to boot the board from SD card.

The board stops booting after starting kernel

CCCCCCCC
U-Boot SPL 2013.10-g78d8ebd (Mar 30 2014 - 20:46:34)
reading args
spl: error reading image args, err - -1
reading u-boot.img
reading u-boot.img

U-Boot 2013.10-g78d8ebd (Mar 30 2014 - 20:46:34)

I2C:   ready
DRAM: 1 GiB
NAND: 256 MiB
MMC:   OMAP SD/MMC: 0, OMAP SD/MMC: 1
Net:   cpsw, usb_ether
Hit any key to stop autoboot: 0
reading zImage
4158656 bytes read in 241 ms (16.5 MiB/s)
Kernel image @ 0x82000000 [ 0x000000 - 0x3f74c0 ]

Starting kernel ...

The bootargs are

bootargs=console=ttyO0,115200n8 root=/dev/mmcblk0p2 mem=128M rootwait
bootcmd=mmc rescan; fatload mmc 0 0x82000000 zImage; bootz 0x82000000
uenvcmd=boot

can any one help let us know what the problem is?

Thanks,

Srikanth.

over 10 years ago

0 Biser Gatchev-XID over 10 years ago

TI__Guru**** 393215 points

This has been forwarded to the SW experts.

0 Steve Kipisz over 10 years ago in reply to Biser Gatchev-XID

TI__Genius 15510 points

For some reason, your .dtb file is not getting loaded and the bootz isn't correct.

Steve K.

0 Ivan Matrakov over 10 years ago in reply to Steve Kipisz

TI__Expert 4475 points

Hi,

Your first boot is from UART - CCCC. But after loading and executing a u-boot the messages have to be other. I didn't see Loading Device Tree to ..., so please could you explain much more what happens.

BR
Ivan

0 B V Srikanth Reddy over 10 years ago in reply to Steve Kipisz

Intellectual 280 points

Hello Steve,

Very sorry for the late reply. I am not well.

Thank you very much for the reply.

Srikanth.

0 B V Srikanth Reddy over 10 years ago in reply to Ivan Matrakov

Intellectual 280 points

Hello Ivan,

Very sorry for the late reply. I am not well.

Thank you very much for the reply. we are working on some high priority stuff. will run this once again and try let you know more as soon as possible.

Regards,

Srikanth.

0 Vijaykumar Ponugoti over 10 years ago

Intellectual 550 points

Does this problem get solved.? Same issue with me.. Please help..

0 RonB over 10 years ago

TI__Mastermind 30526 points

Srikanth,

In order to boot a DeviceTree based kernel like in SDK 7, you have to provide the kernel image, zImage, as well as a valid DTB file.

In your bootcmd, you are only providing the zImage and not the DTB. You need to modify this:

B V Srikanth Reddy said:
bootargs=console=ttyO0,115200n8 root=/dev/mmcblk0p2 mem=128M rootwait
bootcmd=mmc rescan; fatload mmc 0 0x82000000 zImage; bootz 0x82000000
uenvcmd=boot

To something like this:

bootargs=console=ttyO0,115200n8 root=/dev/mmcblk0p2 mem=128M rootwait
bootcmd=mmc rescan; fatload mmc 0 0x82000000 zImage; fatload mmc 0 0x80F80000 **name of dtb file***
bootz 0x82000000 - 0x80F80000
uenvcmd=boot

If you look at setup-uboot-env.sh in the /bin directory of the SDK, you'll find some examples of uenvcmd that we generate as part of the setup script.

This is a bit simpler than decoding all of the BOOTCMD_MMC in ti_armv7_common.h which is in sdk/board-support/u-boot/include/configs.

Hope this helps.

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AM335x sdk 7.00 booting problem.