Content-type: text/html Man page of sys_attrs_pci


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sys_attrs_pci - pci subsystem attributes  


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 contains 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)



Writing PCI Bus Device Drivers




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Time: 02:43:14 GMT, October 02, 2010