RTEMS-mvme5500 BSP update

Kate Feng feng1 at bnl.gov
Thu Mar 19 15:23:01 UTC 2009

Joel Sherrill wrote:
> Any chance of getting a patch to apply to the
> RTEMS source base?
Yes, I can produce a patch for it and file a PR. My questions are:
1) Do you want the patch for RTEMS 4.9.1 only or for both
4.9.1 and 4.8.0 ?

2) There were lots of change, which were not related to any
bug.  It was just an attempt to be consistent with the shared code
in the PowerPC, which was originally written by Eric Valette.
Thus, I thought it would be easier if RTEMS takes the entire tar
file.  If you do not think so, then I  will produce a patch.   The patch
would appear overwhelmed, but the major updates are
really only the three things (e.g. bug fixes and PCI performance),
that were mentioned in my previous E-mail.

Please let me know what you think.  -- Kate
> --joel sherrill
> Kate Feng wrote:
>> Hi,
>> The stable version of RTEMS-mvme5500 BSP is posted at
>> http://www.nsls.bnl.gov/facility/expsys/software/EPICS/
>> The "RTEMS-mvme5500 BSP v1.4.9.1", was tested
>> under RTEMS 4.9.1, and the "RTEMS-mvme5500 BSP v1.4.8.0"
>> was tested under RTEMS 4.8.0..
>> The highlights of the change are :
>> 1)  Use the GT_GPP_Value register (0xf104) instead of the
>> GT_GPP_Interrupt_Cause register (0xf108) to monitor the cause
>> of the level sensitive interrupts. See irq/BSP_irq.c.
>> This is an unique solution which solves part of the bugs in
>> the BSP, which especially affects the 1GHz network driver.
>> 2) There is no change in the 100 MHz network driver. Thus,
>> its performance stays the same.  Some bugs were fixed in the
>> 1GHz network drivers (e.g. if_wm.c).
>> 3)Enable "PCI Read Agressive Prefetch", "PCI Read Line Agressive 
>> Prefetch",
>> and "PCI Read Multiple Agressive Prefetch" to improve the performance of
>> the PCI based applications (e.g. 1GHz network driver). See 
>> pci/pci_interface.c.
>> However, performance is driven by applications.
>> There is no known bug at this point.  Any feedback which is related to
>> the RTEMS-mvme5500 BSP would be highly appreciated.
>> Hope this helps,
>> Kate
>> _______________________________________________
>> rtems-users mailing list
>> rtems-users at rtems.com
>> http://rtems.rtems.org/mailman/listinfo/rtems-users

More information about the users mailing list