[GitHub] [incubator-nuttx] zhuyanlinzyl edited a comment on pull request #5261: xtensa: add svccall handler and use svc call in context switch

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zhuyanlinzyl edited a comment on pull request #5261:
URL: https://github.com/apache/incubator-nuttx/pull/5261#issuecomment-1017250336


   Yes,  As Xtensa is configurable cores, in hardware chip design, our chip let timer interrupt in level-2 and level-3 interrupt level.
   
   In interrupt higher than level one, the `EXCM` bit will not set by hardware when interrupt happen.
   
   I think it's the reason why we encounter this problem, but you not.
   
   In you product, the scheduler timer interrupt run in level-1 interrupt level.
   
   @Ouss4 
   


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