SCO OpenServer

pci_specialcycle(D3oddi)

pci_specialcycle -- generate a PCI special cycle

Synopsis

   #include <sys/pci.h>
     
   void pci_specialcycle(unsigned short busno, unsigned long data);

Description

The pci_specialcycle( ) function generates a PCI special cycle.

Arguments

busno: PCI bus number that will generate the special cycle.
data: 32 bits of data to be broadcast over the bus.

Return Values

None

Usage

Special cycles are not propagated through bridges, and host bridges are not required to provide a mechanism for special cycle generation.

Context and synchronization

Initialization context

Hardware applicability

PCI bus.

Version applicability

oddi: 3, 3mp, 4, 4mp, 5, 5mp, 6, 6mp

SVR5 DDI compatibility

DDI drivers access PCI configuration information through the resource manager database. Use the cm_getval(D3) function to access information supported by the parameters documented on the cm_params(D5) manual page and function such as cm_read_devconfig(D3) and cm_write_devconfig(D3) to access other configuration information. Note that DDI drivers cannot access all the PCI configuration information that SCO OpenServer 5 drivers can access.

References

pci(D4oddi), pci(HW)

pci_buspresent(D3oddi), pci_read(D3oddi), pci_search(D3oddi), pci_write(D3oddi)

``PCI'' in HDK Technical Reference