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Notes about the MVME147 bsp
MVME147 port for TNI - Telecom Bretagne
by Dominique LE CAMPION (Dominique.LECAMPION@enst-bretagne.fr)
May 1996
This bsp is essentially based on the mvme136 bsp.
Summary of the modifications that were made:
* include
- bsp.h
Peripheral Channel Controller memory mapping
Z8530 memory mapping
* startup
- bspstart.c
main () setup for VME roundrobin mode
setup for the PCC interrupt vector base
- bspclean.c
bsp_cleanup () disable timer 1 & 2 interruptions
- linkcmds set the RAM start (0x5000) and size (4Meg - 0x5000)
- setvec.c unchanged
- sbrk.c unchanged
* console
- console.c taken from the dmv152 bsp (Zilog Z8530)
with no modification
* clock
- ckinit.c entirely rewritten for the PCC tick timer 2
* timer
- timerisr.s and timer.c
entirely rewritten for the PCC tick timer 1
now gives results un 6.25 us units (mininum timer delay,
suprising big grain)
* times
- updated results for the mvme147 (beware of the 6.25 us grain)
* Makefiles
- compilation of shmsupp simply removed
To be done:
* add VMEchip memory mapping to include/bsp.h
* update the overheads in coverhead.h
* add support for serila ports 2,3 and 4.
Other notes:
* There is no MP support (no more shmsupp) because I have no
experience of the VME bus. The mvme136 shared memory support
does not seem applicable on the VMEchip of the mvme147, so
I don't know where to start. Suggestions are welcome.
* All the timing tests and sp tests have been run except tmoverhd.
The test hangs during the pause (where the task should be suspended
until a return). Maybe the rtems_initialize_executive is no more
reentrant with this bsp.
Future work:
* Add gdb serial remote support.
* Shared memory support (I don't really need it, but I can do
it if it's simple).
* Message passing on VME bus, with Ada 95 annex E (distributed
systems) in mind.
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