Re: [I] [HELP] Boot multi-core on FVP A510, but the code still run "while (up_testset(lock) == SP_LOCKED)" loop in spin_lock() [nuttx]

Wed, 16 Oct 2024 02:10:23 -0700 


lzc1001 commented on issue #14257:
URL: https://github.com/apache/nuttx/issues/14257#issuecomment-2416190722

   Hi, I have another question for function "int arm64_gic_send_sgi()". I find 
that read vaule of GICR_IGROUP0 is 0x0 in non-secure EL1, but the value is 
0xDFFF00FF in secure and the value(0xDFFF00FF) is set by ARM TF-A in EL3. So, 
Is the "if " judgement condition reasonable when the core run in non-secure EL1?
   
![image](https://github.com/user-attachments/assets/df2ac52e-c1b4-4e9d-82d8-ec6af42638da)
   Those two pictures are from Learn the architecture - Generic Interrupt 
Controller v3 and v4, Overview
   
![image](https://github.com/user-attachments/assets/ba391d17-c3a5-475d-9f5a-bf1620d9d8e1)
   
![image](https://github.com/user-attachments/assets/328e5867-0a60-4abe-855a-dd8f0bab9f56)
   
   
   


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