How to do use the SRAM and define the OCRAM address in imx8MP?

[charleshuang]

Hi NXP

Do you have example about how to use the SRAM in imx8mp?

We fine the OCRAM address. How to do about define the address in imx8mp?

Thanks.

[Zhiming_Liu]

Hi @charleshuang 

Do you need define the address in M core SDK?

[charleshuang]

Hi @Zhiming_Liu 

We need to use the SRAM and define the address for access SRAM. 

Do you have advice?

[Zhiming_Liu]

Hi @charleshuang 

Please share more detail about your question.

For example, you want to OCRAM_S/OCRAM_A? Which layer you want to define it ? In A core or M core?

[charleshuang]

Hi @Zhiming_Liu 

About OCRAM_S/OCRAM_A, what is different?

We want to define A core.

[charleshuang]

@Zhiming_Liu 

We find the setting in imx8mp.dtsi.

//----------------------------------------//

resmem: reserved-memory {
#address-cells = <2>;
#size-cells = <2>;
ranges;

ocram: ocram@900000 {
no-map;
reg = <0 0x900000 0 0x70000>;
};

//----------------------------------------//

Do you have any SOP the test and read/write date in SRAM(NXP)?

Thanks.

[Zhiming_Liu]

Hi @charleshuang 

There is memtool in demo image, you can test like this:

root@imx8mpevk:/unit_tests# ./memtool -32 0x910000 0x0001
E
Reading 0x1 count starting at address 0x00910000

0x00910000:  006F0074

root@imx8mpevk:/unit_tests# ./memtool -32 0x910000=0x0001
Writing 32-bit value 0x1 to address 0x00910000
root@imx8mpevk:/unit_tests# ./memtool -32 0x910000 0x0001
E
Reading 0x1 count starting at address 0x00910000

0x00910000:  00000001