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pcitweak - read/write PCI config space
pcitweak -l
pcitweak -r PCI-ID [-b|-h] offset
pcitweak -w PCI-ID [-b|-h] offset value
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.
- -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).
scanpci(1)
David Dawes
([email protected]).
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