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sys_attrs_pci(5) [osf1 man page]

sys_attrs_pci(5)						File Formats Manual						  sys_attrs_pci(5)

NAME
sys_attrs_pci - pci subsystem attributes DESCRIPTION
This reference page lists and describes attributes for the PCI (pci) kernel subsystem. Refer to the sys_attrs(5) reference page for an introduction to the topic of kernel subsystem attributes. For this subsytem, users should modify only the following attribute and do so only for the purpose described. Any other visible attributes cannot or should not be modified. A bit-mask setting that allows the developer of PCI hardware and softwareto determine the PCI configuration parameters on an Alpha system based on the PCI bus. By setting PCI_Developer_Debug to different values, a variety of hardware-related or software-related information about all PCI devices on an AlphaServer are printed out at system bootstrap time. If loadable drivers are used, loadable configuration data is also printed out on execution of the sysconfig -c command. Refer to the /usr/include/io/dec/pci/pci_debug.h file for valid bit-field settings for this attribute. The pci_debug.h file con- tains macro definitions that state the type of information that is printed out if PCI_Developer_Debug is set to a particular value. Any combination of the bit-flags is valid. For example, the value 0x70 allows the hardware or software developer to see the PCI configuration header information that the kernel reads or assigns to PCI devices. Default value: 0 Minimum value: 0 Maximum value: FFFFFFFF(16) SEE ALSO
sys_attrs(5) Writing PCI Bus Device Drivers sys_attrs_pci(5)

Check Out this Related Man Page

PCITWEAK(1)						      General Commands Manual						       PCITWEAK(1)

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
scanpci(1) AUTHORS
David Dawes (dawes@xfree86.org). XFree86 Version 4.7.0 PCITWEAK(1)
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