source: rtems/c/src/lib/libbsp/m68k/mvme147s/README @ b1b5a7cb

4.104.114.84.95
Last change on this file since b1b5a7cb was afe99c2, checked in by Joel Sherrill <joel.sherrill@…>, on Sep 18, 1996 at 2:17:54 PM

new file submitted by Dominique le Campion.

  • Property mode set to 100644
File size: 2.1 KB
RevLine 
[afe99c2]1#
2#  $Id$
3#
4
5Notes about the MVME147S bsp
6
7MVME147 port for TNI - Telecom Bretagne
8by Dominique LE CAMPION (Dominique.LECAMPION@enst-bretagne.fr)
9May 1996
10
11
12This bsp is essentially based on the mvme136 bsp,
13and is only an extention of the MVME147 bsp. There
14are slight differences in the VMEchips used in the MVME147S and
15the MVME147 that should prevent the shmsupport and the startup
16code from running on a MVME147.
17
18Summary of the modifications that were made:
19
20 * include
21 
22   - bsp.h
23      Peripheral Channel Controller memory mapping
24      Z8530 memory mapping
25      VMEchip memory mapping
26 
27 * startup
28 
29   - bspstart.c
30      main () setup for VME roundrobin mode
31              setup for the PCC interrupt vector base
32              setup of the VME shared memory
33   - bspclean.c
34      bsp_cleanup () disable timer 1 & 2 interruptions
35   - linkcmds set the RAM start (0x7000) and size (4Meg - 0x7000)
36   - setvec.c unchanged
37   - sbrk.c unchanged
38 
39 * console
40 
41   - console.c taken from the dmv152 bsp (Zilog Z8530)
42               with no modification
43 
44 * clock
45 
46   - ckinit.c entirely rewritten for the PCC tick timer 2
47 
48 * timer
49 
50   - timerisr.s and timer.c
51     entirely rewritten for the PCC tick timer 1
52     now gives results un 6.25 us units (mininum timer delay,
53     suprising big grain)
54 
55 * times
56 
57   - updated results for the mvme147 (beware of the 6.25 us grain)
58
59 * shmsupp :
60   Specific to the S version of the MVME147
61   Only tested with 2 boards, in interrupt mode.
62   Uses the top 128k of the VME system controller board RAM
63   as the shared space.
64
65   - mpisr.c : uses the SIGLP interruption
66
67   - Makefile : unchanged
68
69   - getcfg.c : rewritten
70
71   - lock.c unchanged
72
73   - addrconv.c unchanged
74
75 * Makefiles
76   
77   - unchanged
78
79
80To be done:
81
82 * update the overheads in coverhead.h
83
84 * add support for serial ports 2,3 and 4.
85
86Other notes:
87
88 * All the timing tests and sp tests have been run except tmoverhd.
89   The test hangs during the pause (where the task should be suspended
90   until a return). Maybe the rtems_initialize_executive is no more
91   reentrant with this bsp.
92
Note: See TracBrowser for help on using the repository browser.