AM6422: rpmsg DDR size

wanglili 王

Part Number: AM6422
Other Parts Discussed in Thread: SYSCONFIG

Tool/software:

Hello，

We use the rpmsg-char example. Linux can interact with R5F0-0. According to our needs, we add our own applications to the rpmsg-char example project of R5F, but the DDR size used is more than 15M. In this case, can we directly modify the LENGTH of DDR_1 in the link.cmd file if other R5F cores are not used?If so, what does linux need to be modified?

8 months ago

0 Paula Carrillo 8 months ago

TI__Mastermind 40350 points

Hi, depending on the R5F project you are using as example, you can change DDR size directly linker.cmd, or in some projects this is done via SysConfig Memory Configurator (AM64x MCU+ SDK: Memory Configurator)

When doing changes to memory layout please keep in mind DDR memory map between Linux + RTOS AM64x MCU+ SDK: Memory Map Layout

hope this helps.

Thank you,

Paula

0 wanglili 王 8 months ago in reply to Paula Carrillo

Intellectual 730 points

Thanks for your reply. I'm using linux+RTOS, in this case, is it OK if R5F0-0 uses more than A100000 in the figure? In fact, my R5F core program did not run like this. Is this 15M verified for each R5F that cannot exceed this data size? Is it okay to not use other R5F cores?

0 Paula Carrillo 8 months ago in reply to wanglili 王

TI__Mastermind 40350 points

Hi, DDR memory carveouts can be reallocated to other cores when other cores are not used, as explained in AM64x Academy -> Allocating memory in linux

Allocating memory in Linux

How to allocate memory

Thank you,

Paula

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AM6422: rpmsg DDR size