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From: Doug Rabson <dfr@FreeBSD.ORG>
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Date: Sun, 14 Jun 1998 06:53:15 -0700 (PDT)
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To: cvs-committers@FreeBSD.ORG, cvs-all@FreeBSD.ORG, cvs-sys@FreeBSD.ORG
Subject: cvs commit: src/sys/alpha/alpha clock_if.m src/sys/alpha/include
         clockvar.h src/sys/dev/dec mcclock_if.m src/sys/kern bus_if.m
         device_if.m makedevops.sh
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dfr         1998/06/14 06:53:14 PDT

  Added files:
    sys/alpha/alpha      clock_if.m 
    sys/alpha/include    clockvar.h 
    sys/dev/dec          mcclock_if.m 
    sys/kern             bus_if.m device_if.m makedevops.sh 
  Log:
  [Add missing files from previous commit]
  
  Major changes to the generic device framework for FreeBSD/alpha:
  
  * Eliminate bus_t and make it possible for all devices to have
    attached children.
  
  * Support dynamically extendable interfaces for drivers to replace
    both the function pointers in driver_t and bus_ops_t (which has been
    removed entirely.  Two system defined interfaces have been defined,
    'device' which is mandatory for all devices and 'bus' which is
    recommended for all devices which support attached children.
  
  * In addition, the alpha port defines two simple interfaces 'clock'
    for attaching various real time clocks to the system and 'mcclock'
    for the many different variations of mc146818 clocks which can be
    attached to different alpha platforms.  This eliminates two more
    function pointer tables in favour of the generic method dispatch
    system provided by the device framework.
  
  Future device interfaces may include:
  
  * cdev and bdev interfaces for devfs to use in replacement for specfs
    and the fixed interfaces bdevsw and cdevsw.
  
  * scsi interface to replace struct scsi_adapter (not sure how this
    works in CAM but I imagine there is something similar there).
  
  * various tailored interfaces for different bus types such as pci,
    isa, pccard etc.

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