Service_ReleaseFIQ (changes)
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Programmer's Reference Manuals
» Part 16 – Service Calls
» Service_ReleaseFIQ
Service_ReleaseFIQ
(Service &0B)
| Entry | |
|---|---|
| R1 | 11 (&0B) |
| Exit | |
|---|---|
| All registers preserved to pass on, else | |
| R1 | 0 (claim service) |
Use
This service must be issued by a module when it voluntarily releases the FIQ hardware vector.
Notes
A module can claim this vector if it wants to take over ownership of the FIQ vector. If the call is left unclaimed then the kernel will take ownership, installing a default handler which disables and ignores any received FIQ.
This call should only be issued when a module voluntarily releases control of the FIQ vector. It should not be issued in response to Service_ClaimFIQ or Service_ClaimFIQinBackground.
See also
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