Entry | |
---|---|
R1 | 12 (&0C) |
Exit | |
---|---|
All registers preserved to pass on, else | |
R1 | 0 (claim service) |
This service is issued by a module running as a foreground task (not IRQ), that wants to claim the FIQ hardware vector.
If you are the current owner, you must release the vector as soon as possible, and signal this by claiming this service.