Map an interrupt pin to an IRQ
Synopsis:
#include <hw/pci.h>
int pci_map_irq( unsigned bus,
unsigned dev_func,
short intno,
short intpin );
Arguments:
- bus
- The bus number of the device.
- dev_func
- The device or function number of the device. The device number
is in bits 7 through 3, and the function number is in bits 2 through 0.
- intno
- The interrupt to be mapped (e.g. 0 - 15 on x86).
- intpin
- The PCI interrupt pin (0x0a - 0x0d).
Library:
libc
Use the -l c option to
qcc
to link against this library.
This library is usually included automatically.
Description:
The pci_map_irq() function maps a PCI interrupt pin to a specific interrupt request (IRQ).
Note:
You must successfully call
pci_attach()
before calling any of the other PCI functions.
Returns:
- PCI_SUCCESS
- Success.
- PCI_SET_FAILED
- The PCI server was unable to map the intno/intpin.
- PCI_UNSUPPORTED_FUNCTION
- This function isn't supported.
- -1
- You haven't called
pci_attach(),
or the call to it failed.
Classification:
QNX Neutrino
Safety: |
|
Cancellation point |
Yes |
Interrupt handler |
No |
Signal handler |
Yes |
Thread |
Yes |