source: rtems/bsps/m68k/mvme147/README @ 5959b1e

Last change on this file since 5959b1e was 5959b1e, checked in by Joel Sherrill <joel@…>, on Sep 10, 2020 at 5:29:11 PM

Remove tmoverhd which existed to produce the obsolete coverhd.h

Closes #4040.

  • Property mode set to 100644
File size: 1.8 KB
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1Notes about the MVME147 bsp
2
3MVME147 port for TNI - Telecom Bretagne
4by Dominique LE CAMPION (Dominique.LECAMPION@enst-bretagne.fr)
5May 1996
6
7
8This bsp is essentially based on the mvme136 bsp.
9
10Summary of the modifications that were made:
11
12 * include
13 
14   - bsp.h
15      Peripheral Channel Controller memory mapping
16      Z8530 memory mapping
17 
18 * startup
19 
20   - bspstart.c
21      main () setup for VME roundrobin mode
22              setup for the PCC interrupt vector base
23   - bspclean.c
24      bsp_cleanup () disable timer 1 & 2 interruptions
25   - linkcmds set the RAM start (0x5000) and size (4Meg - 0x5000)
26   - setvec.c unchanged
27   - sbrk.c unchanged
28 
29 * console
30 
31   - console.c taken from the dmv152 bsp (Zilog Z8530)
32               with no modification
33 
34 * clock
35 
36   - ckinit.c entirely rewritten for the PCC tick timer 2
37 
38 * timer
39 
40   - timerisr.s and timer.c
41     entirely rewritten for the PCC tick timer 1
42     now gives results un 6.25 us units (mininum timer delay,
43     suprising big grain)
44 
45 * times
46 
47   - updated results for the mvme147 (beware of the 6.25 us grain)
48
49 * Makefiles
50   
51   - compilation of shmsupp simply removed
52
53
54To be done:
55
56 * add VMEchip memory mapping to include/bsp.h
57
58 * update the overheads in coverhead.h
59
60 * add support for serila ports 2,3 and 4.
61
62Other notes:
63
64 * There is no MP support (no more shmsupp) because I have no
65   experience of the VME bus. The mvme136 shared memory support
66   does not seem applicable on the VMEchip of the mvme147, so
67   I don't know where to start. Suggestions are welcome.
68
69 * All the timing tests and sp tests have been run.
70
71Future work:
72
73 * Add gdb serial remote support.
74
75 * Shared memory support (I don't really need it, but I can do
76   it if it's simple).
77
78 * Message passing on VME bus, with Ada 95 annex E (distributed
79   systems) in mind.
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