SPRZ570C November   2023  – July 2025 AM263P2-Q1 , AM263P4 , AM263P4-Q1

 

  1.   1
  2.   Abstract
  3. 1Usage Notes and Advisories Matrices
  4. 2Silicon Revision 1.0 Usage Notes and Advisories
    1. 2.1 Silicon Revision 1.0 Usage Notes
      1.      i2324
      2.      i2488
    2. 2.2 Silicon Revision 1.0 Advisories
      1.      i2189
      2.      i2310
      3.      i2374
      4.      i2311
      5.      i2345
      6.      i2351
      7.      i2352
      8.      i2353
      9.      i2354
      10.      i2356
      11.      i2357
      12.      i2358
      13.      i2359
      14.      i2383
      15.      i2392
      16.      i2393
      17.      i2394
      18.      i2401
      19.      i2404
      20.      i2405
      21.      i2426
      22.      i2427
      23.      i2428
      24.      i2433
      25.      i2438
      26.      i2439
      27.      i2485
      28.      i2486
  5. 3Trademarks
  6. 4Revision History

i2394

Race condition in interrupt and error aggregator capture registers resulting in events miss

Details:

Potential race condition in capture registers resulting in events getting lost while other events in the same register are being cleared by writing to the register. Following registers are impacted by this issue:

MSS_CTRL: *INTAGG_STATUS_REG, *TPCC_ERR/INTAGG_STATUS_RAW

Workaround(s):

Follow below steps in ISR:

1) Before exiting the ISR read the *_ERRAGG_RAW and check the bit-validity by "anding" with *_ERRAGG_MASK.

2) If any bit is set that-implies there is a interrupt/Error which got missed while clearing the *_ERRAGG_STATUS.

3) Service the corresponding bit in ISR and then exit the ISR. So ISR should be exited after both STATUS and "RAW&MASK" are zero