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NAME    [Toc]    [Back]

       sys_attrs_pci - pci subsystem attributes

DESCRIPTION    [Toc]    [Back]

       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)

SEE ALSO    [Toc]    [Back]


       Writing PCI Bus Device Drivers

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