DRA72XEVM: Using the XMC functionality via the CSL

Michal Ciesielski

Part Number: DRA72XEVM

Hello,

I'm implementing the memory protection on the C66x DSP side. The memory protection works but in order to have it working I had to copy functionality from the dsp_xmc.h file. That's because the libraries in the pdk_dra7xx_1_0_10/packages/ti/csl/lib/dra72x/c66/release/ are not built with the XMC functions. There are no symbols like DSPXMCSetMPAXSegment or DSPXMCGetFaultAddr in the library.

What's the proper way of accessing those functions? Do I need to use a xdc.useModule('the XMC module name') in the config file? I can't find any module that would do that in the PDK files.

Regards, Michal

over 6 years ago

0 Stephen Molfetta over 6 years ago

TI__Expert 5725 points

Hi Michal,

You are right in that the XMC functions are not included in the CSL library for DRA7xx devices. If you wish to enable, you must do the following:

Enable the compilation of dsp_xmc.c in the build of the CSL library
1. Include dsp_xmc.c in csl/arch/c66x/src_files_c66x.mk
2. Include the header files based on the SOC
Rebuild C66x CSL library for DRA72x
Include csl/arch/csl_arch.h in the application and use the functions you need in your source code.

I have attached a small diff which demonstrates #1: /cfs-file/__key/communityserver-discussions-components-files/791/C66x_5F00_XMC_5F00_enable.diff

Thanks,
Stephen

0 Marcus Christensson80 over 6 years ago in reply to Stephen Molfetta

Intellectual 270 points

Hi Stephen!

Is this something that you can fix in future releases? (or is it already as it should in future releases?)

Regards,

Marcus Christensson

0 Stephen Molfetta over 6 years ago in reply to Marcus Christensson80

TI__Expert 5725 points

Hi Marcus,

We do not have releases planned for this product at this time, but we will definitely update this library with the XMC functions should we plan a new release.

You can subscribe to alerts for the SDK releases from http://www.ti.com/tool/PROCESSOR-SDK-DRA7X in case you are interested for future reference.

Thanks,
Stephen

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DRA72XEVM: Using the XMC functionality via the CSL