lywind commented on issue #12687:
URL: https://github.com/apache/nuttx/issues/12687#issuecomment-2230131835

   > 1. Seems as expected, you need to confirm with vendor the behavior of 
**RAR(Reset all registers)** when lockstep is disabled, which is fixed on 
design phase.
   > 2. Zephyr does something similar, I think initializing the registers is 
necessary
   >    [arch: arm: Rewrite Cortex-R reset vector function. 
zephyrproject-rtos/zephyr#20473](https://github.com/zephyrproject-rtos/zephyr/pull/20473)
   > 
   > 
[ARM_ECM_0690721_Cortex_M33_DCLS.pdf](https://github.com/user-attachments/files/16233802/ARM_ECM_0690721_Cortex_M33_DCLS.pdf)
   > 
   > 
![20240715-194023](https://private-user-images.githubusercontent.com/758493/348691216-8b59d6e7-9ba5-44f6-8ce9-4769b3d310d1.jpg?jwt=eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJpc3MiOiJnaXRodWIuY29tIiwiYXVkIjoicmF3LmdpdGh1YnVzZXJjb250ZW50LmNvbSIsImtleSI6ImtleTUiLCJleHAiOjE3MjExMDY1MTksIm5iZiI6MTcyMTEwNjIxOSwicGF0aCI6Ii83NTg0OTMvMzQ4NjkxMjE2LThiNTlkNmU3LTliYTUtNDRmNi04Y2U5LTQ3NjliM2QzMTBkMS5qcGc_WC1BbXotQWxnb3JpdGhtPUFXUzQtSE1BQy1TSEEyNTYmWC1BbXotQ3JlZGVudGlhbD1BS0lBVkNPRFlMU0E1M1BRSzRaQSUyRjIwMjQwNzE2JTJGdXMtZWFzdC0xJTJGczMlMkZhd3M0X3JlcXVlc3QmWC1BbXotRGF0ZT0yMDI0MDcxNlQwNTAzMzlaJlgtQW16LUV4cGlyZXM9MzAwJlgtQW16LVNpZ25hdHVyZT0xMTI5N2E1MzUzMjEzN2NmODE1OTE0YjE5ZmY5Yzc3OGY0MDg0ZWNmOTU3N2QwNzM3OWU5Zjk3YmM2OTZkNjVhJlgtQW16LVNpZ25lZEhlYWRlcnM9aG9zdCZhY3Rvcl9pZD0wJmtleV9pZD0wJnJlcG9faWQ9MCJ9.o1cNZ0dyetb09TjLSEA19NCvTi7HnAhCNtMSIwrYNo8)
   
   In fact, this is a Cortex-M7 MCU which is the ARM v7M-E architecture. And it 
does not have LOCKSTEP or RAR configurations. So I think it might not be the 
DCLS problem.


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