Where DDR Ram gets initialised when there is no SPL

adityanagal — Wed, 05 Apr 2017 11:09:04 GMT

Hi ,

The normal boot process is , SPL is loaded to the SRAM and during the execution of the SPL DDR Ram gets initialized.

Once the DDR is initialized , u-boot /kernel is loaded to DDR Ram.

Now SPL is no longer in use and CPU directly loads the u-boot to DRAM. Now question is , where the DDR Ram gets initialized ? IMX can load u-boot only when the DDR ram is initialized. Where this initialization happens ?

Please suggest.

Regards,

Aditya Nagal

Re: Where DDR Ram gets initialised when there is no SPL

Yuri — Wed, 05 Apr 2017 11:16:40 GMT

Hello,

Other mechanism for system initialization is using the DCD Table.

Please refer to Chapter 1 (Porting U-Boot from an i.MX 6/7 Reference

Board to an i.MX 6/7 Custom Board) of “i.MX_BSP_Porting_Guide.pdf”

in Linux documentation.

http://www.nxp.com/webapp/Download?colCode=L4.1.15_2.0.0-LINUX-DOCS&Parent_nodeId=1337699481071706174845&Parent_pageType…

Have a great day,
Yuri

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topic Re: Where DDR Ram gets initialised when there is no SPL in i.MX Processors

Where DDR Ram gets initialised when there is no SPL

Re: Where DDR Ram gets initialised when there is no SPL