NAME
pcitweak - read/write PCI config space
SYNOPSIS
pcitweak
−l
pcitweak −r PCI-ID
[−b|−h] offset
pcitweak −w PCI-ID
[−b|−h] offset value
DESCRIPTION
Pcitweak is a utility that can be used to examine or change registers in the PCI configuration space. On most platforms pcitweak can only be run by the root user.
OPTIONS
|
−l |
Probe the PCI buses and print a line for each detected device. Each line contains the bus location (bus:device:function), chip vendor/device, card (subsystem) vendor/card, revision, class and header type. All values printed are in hexadecimal. |
−r PCI-ID
Read the PCI configuration space register at offset for the PCI device at bus location PCI-ID. PCI-ID should be given in the form bus:device:function, with each value in hexadecimal. By default, a 32-bit register is read.
−w PCI-ID
Write value to the PCI configuration space register at offset for the PCI device at bus location PCI-ID. PCI-ID should be given in the form bus:device:function, with each value in hexadecimal. By default, a 32-bit register is written.
|
−b |
Read or write an 8-bit value (byte). |
|||
|
−h |
Read or write a 16-bit value (halfword). |
SEE ALSO
AUTHORS
David Dawes (dawes [AT] xfree86.org).