topic Copy Mechanism from boot device to SDRAM in i.MX Processors

Copy Mechanism from boot device to SDRAM

ko-hey — Fri, 08 May 2015 07:38:58 GMT

Hi all

I'm developing a board with i.MX6SoloLite and I have a question about start-up sequence.

I want to know a copy mechanism to SDRAM from boot device such as SD card etc.

During start-up sequence, U-boot that is got from boot device will be copied to SDRAM.

However, I think that their file formats are different.

How it can be copied ?

Is there any description about the copy mechanism ?

Best Regards,

ko-hey

Re: Copy Mechanism from boot device to SDRAM

Yuri — Fri, 08 May 2015 08:49:49 GMT

The system boot up sequence is as following :

ROM code copy 4K byte data (include IVT and DCD table) from
boot device to OCRAM.
Init the DDR base on the DCD table settings.
Load the u-boot form boot device and copy it to DDR.
Jump to DDR to executes the u-boot.

So, for proper boot the U-boot image should contain the IVT and DCD.

Have a great day,
Yuri

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Re: Copy Mechanism from boot device to SDRAM

ko-hey — Tue, 12 May 2015 04:03:44 GMT

Hi Yuri

Thank you for your reply.

I'll share your answer to my team and if I have additional question, I'll ask you.

Ko-hey