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Service_ClaimFIQinBackground
Programmer's Reference Manuals
» Part 16 – Service Calls
» Service_ClaimFIQinBackground
Service_ClaimFIQinBackground
(Service &47)
| Entry | |
|---|---|
| R1 | 71 (&47) |
| Exit | |
|---|---|
| R1 | 0 to claim service, else preserved to pass on |
Use
This service is issued by a module running as a background task (i.e. IRQ) that wants to claim the FIQ hardware vector, or a foreground task that wants to poll availability of the vector.
Notes
If you are the current owner and wish to release the vector, you should do so and signal this by claiming this service.