topic Re: Location for writing SPL in different boot devices in i.MX Processors

Location for writing SPL in different boot devices

adityanagal — Wed, 13 Sep 2017 12:59:42 GMT

Hi ,

In the reference manual , Boot_CFG1[7:4] are used for Boot device selection. What will be location for writing the SPL

in different boot devices like Nor Flash , Nand , eMMC etc. Could you please refer any document having these details.

Please suggest.

Regards,

Aditya Nagal

Re: Location for writing SPL in different boot devices

Carlos_Musich — Thu, 14 Sep 2017 21:31:34 GMT

Hi Aditya,

The booting information is in chapter 8 of Reference Manual. There you will find what you need about the boot process.

Regarding your question, SPL is not changing when you change the booting source, it is the fuses that you must configure.

When the imx boot, the romcode will run on first instance, it will read the fuses and will look for te boot source depending on the fuses configuration.

Regards,
Carlos

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Re: Location for writing SPL in different boot devices

adityanagal — Fri, 15 Sep 2017 08:17:21 GMT

Hi Carlos ,

Probably I could not clarify the question. My question is , when I am writing the SPL over SDcard , I write it over the 1K location using the below command .

sudo dd if=SPL of=${DISK} seek=1 bs=1k

My question is , when this booting devices gets changed obviously as per the fuse settings , like Nand Flash ,

then at what location SPL need to be written , will it be the same or different.

Re: Location for writing SPL in different boot devices

Carlos_Musich — Fri, 15 Sep 2017 17:26:45 GMT

Hi Aditya,

It does change, I assume you have already downloaded the Documentation package of the BSP that you are using. Please take a look to chapter 4.6 Flash memory maps on i.MX_Linux_User's_Guide.pdf

If you don't have this documentation please let me know the MCU and the Linux version you are using and I will let you know where to get it.

Regards,
Carlos