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cache configuration cause edma initialization failure!

Bendney Yu
Expert 1420 points

platform: C6A8168

develop tools: EzSDK 5_02_02_60

edma3 lld: edma3lld_02_11_02_04

I set those in server's .cfg file,  when I initialize edma driver, it's failed!

var Cache = xdc.useModule('ti.sysbios.family.c64p.Cache');
Cache.MAR0_31    = 0xffffffff;
Cache.MAR32_63   = 0xffffffff;
Cache.MAR64_95   = 0xffffffff;
Cache.MAR96_127  = 0xffffffff;
Cache.MAR128_159 = 0xffffffff;
Cache.MAR160_191 = 0xffffffff;
Cache.MAR192_223 = 0xffffffff;
Cache.MAR224_255 = 0xffffffff;
Cache.initSize.l1pSize = Cache.L1Size_32K;
Cache.initSize.l1dSize = Cache.L1Size_32K; 
Cache.initSize.l2Size  = Cache.L2Size_256K;
I don't know the reason why this error can happen.  When I hide this configurations, The failure's gone!
I set this configurations for opening cache on c674x DSP core.
  • 0
    TI__Mastermind 32475 points

    benlu,

    Are you placing any code or data into L2 memory?  You need to make sure that your not placing things into the part of L2 that becomes the L2 cache.

    My guess is that its the line:  'Cache.initSize.l2Size  = Cache.L2Size_256K;'  which makes the issue show up since L1P and L1D by default have 32K cache turned on.

    But this would only tell you that there's an issue when L2 cache is enabled, it doesn't really tell you where the issue is.

    What are the symptons of the error?  Is it incorrect data? a crash?

    Could it be the edma code is not handling the caching in L2 correctly?

    Judah

  • 0 in reply to judahvang
    Expert 1420 points

    judahvang,

    I'm sure I don't place any code to L2 memory. I duplicated the Cache.initSize setting, the problem is still exist. The symptons is incorrect data and a crash that McASP GBLCTL registers write error and get rsrctl register failed after initializing edma driver. 

  • 0 in reply to Bendney Yu
    TI__Mastermind 32475 points

    Benlu,

    Did you resolve your problem?

    Without much information, if you still have the problem, my suggestions would be to try didn't cache settings and also different placement of your data sections.

    Judah

  • 0 in reply to judahvang
    Expert 1420 points

    judahvang,

    I still haven't resolved the problem, because I didn't know much about this configurations, I just know this setting open cache.  Can you give me some guides?Thank you!

  • 0 in reply to judahvang
    Expert 1420 points

    judahang,

    I have tried didn't cache settings and place data to different section, and the problems still exist. Is it possible that cache settings related with my EDMA3 application problem?