C6678 Notify vs SWI

murad qahwash

Hi all,

I am using the Notify module to send a notification from core 0 to core 1...when core 1 receives the notification, it posts a SWI...my question, what happen if another notification arrives core 1 before the SWI is done?...which one is higher priority: Notify or SWI?

Regards,

Murad

over 10 years ago

0 Raja over 10 years ago

TI__Guru* 81335 points

Hi Murad,
Make sure that the ISR code is very minimal.

I hope you will be using SYS/BIOS based application. Please go through below page for hardware interrupt handling using SYS/BIOS.

processors.wiki.ti.com/.../BIOS_Training:_Hwis

Thank you.

0 murad qahwash over 10 years ago in reply to Raja

Genius 3770 points

Thanks Raja for the response.
I am using SYS/BIOS to create the SWI. The Notify is only used to let core 1 that a block of data is ready (read by core 0 from FPGA using PCIe)...the SWI_ISR does all the signal processing, so most of the time is used in the SWI and the Notify is just a way to Post the SWI...is there a different way that SYS/BIOS works?

0 Raja over 10 years ago in reply to murad qahwash

TI__Guru* 81335 points

Hi Murad,

The SWI ISR runs on core 1. Is my understanding right? My recommendation is to check with TI-RTOS experts before implementing this design, you may need to implement bottom halves to avoid missing interrupts.

Please post your TI-RTOS queries to BIOS Forum

Thank you.

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C6678 Notify vs SWI