[RTEMS Project] #3456: Add support for CPU counter timestamps

[RTEMS trac]

#3456: Add support for CPU counter timestamps
-----------------------------+------------------------------
 Reporter:  Sebastian Huber  |       Owner:  Sebastian Huber
     Type:  enhancement      |      Status:  assigned
 Priority:  normal           |   Milestone:  5.1
Component:  score            |     Version:  5
 Severity:  normal           |  Resolution:
 Keywords:                   |  Blocked By:
 Blocking:                   |
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Comment (by Sebastian Huber <sebastian.huber@…>):

 In [changeset:"762fa62ccaebadb7fa486da634c27b02960112b1/rtems"
 762fa62/rtems]:
 {{{
 #!CommitTicketReference repository="rtems"
 revision="762fa62ccaebadb7fa486da634c27b02960112b1"
 arm: Simplify CPU counter support

 Use the standard ARMv7-M systick module for the ARMv7-M CPU counter
 instead of DWT counter since the DWT counter is affected by power saving
 states.

 Use an inline function for _CPU_Counter_difference() for all ARM BSPs.

 Update #3456.
 }}}

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Ticket URL: <http://devel.rtems.org/ticket/3456#comment:4>
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