pci_write(D3hpci)

pci_write -- write data to PCI configuration space

Synopsis

   #include <sys/types.h>
   #include <sys/hpci.h>
   #include <sys/hpci_bios.h>
   #include <sys/ddi.h>
   
   int pci_write_byte(rm_key_t hpci, uchar_t bus, uchar_t devfun,
                     ushort_t offset, uchar_t buf);
   

   int pci_write_word(rm_key_t hpci, uchar_t bus, uchar_t devfun,
                     ushort_t offset, ushort_t buf);
   

   int pci_write_dword(rm_key_t hpci, uchar_t bus, uchar_t devfun,
                     ushort_t offset, uint_t buf);

Description

The pci_write( ) functions write a byte, word, or double word to PCI configuration space for the device on the specified bus with the device/function number as specified in the PCI BIOS specification.

Arguments

hpci

resource manager key for this instance of the hot plug controller.

bus

PCI bus to be queried.

devfun

device/function number as defined in the PCI BIOS specification. This is defined as:

   (device << 3) | (function)

offset

offset in config space into which to write; should be less than 256.

buf

data to be written.

Return values

This function returns values as per corresponding 2.1 PCI BIOS calls.

Usage

Context and synchronization

Blockable context

Hardware applicability

All

Version applicability

hpci: 1

References

pci(D5)

``Hotplug devices''
``PCI''