i.MX ProcessorsのトピックRe: imx7ulpevk memory

imx7ulpevk memory

kayiyeh — Wed, 02 Oct 2019 06:31:51 GMT

Dear All,

I have a imx7ulpevk board. I changed the on board DRAM with a 4Gb LPDDR3. I would like to test the memory as much as I can from the A7 CPU core. When I boot up the A7 core with Linux, I found there are some space seems to be reserved for the M4 or for A7/M4 communication . If this is true, is there any method to change? Will it work if I delete the rpmsg reserved memory in the dtsi file?

Regards,

Ka-Yi

Re: imx7ulpevk memory

igorpadykov — Wed, 02 Oct 2019 07:47:05 GMT

Hi Ka-Yi

yes one can try to delete reserved memory in dts file, it should work.

Best regards
igor
-----------------------------------------------------------------------------------------------------------------------
Note: If this post answers your question, please click the Correct Answer button. Thank you!
-----------------------------------------------------------------------------------------------------------------------

Re: imx7ulpevk memory

kayiyeh — Wed, 02 Oct 2019 08:40:46 GMT

Dear Igor,

Thank you for your quick response. When I modified the imx7ulp.dtsi as attached then copy back to :

work/imx7ulpevk-poky-linux-gnueabi/u-boot-imx/2018.03-r0/git/arch/arm/dts/imx7ulp.dtsi

it seems fine to bitbake but the result turns out the same. Did I modify the wrong file?

Ka-Yi

Re: imx7ulpevk memory

igorpadykov — Wed, 02 Oct 2019 10:14:32 GMT

Hi Ka-Yi

one can look at i.MX7D example, without rpmsg_reserved :

imx7d.dtsi\dts\boot\arm\arch - linux-imx - i.MX Linux kernel

Best regards
igor