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Bob Wisdon <bobwis@ascweb.co.uk> and Chris Johns <ccj@acm.org>
to resolve a random network lockup problem.
ckinit.c:
Occasional network lockups have been noted when the PIT has a higher
interrupt request level than the CPM. The SCC1 bit in the CISR is set
even though the SCC1 interrupt handler is not active. This blocks
interrupts from SCC1 (and all other CPM sources) and locks up the
system. It has not been determined whether the error is within the
68360 or in the RTEMS interrupt support assembler code. The solution,
for now, is to set both PIT and CPM interrupt request levels to the same
value (4).
network.c:
Set CPM transmitter buffer pointer (_tbptr) to beginning of frame
before restarting transmitter. Don't retire transmitter buffer
descriptors belonging to the restarted frame.
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If you're getting close to a new snaphot, here's something that
might be useful to add to the BSP README notes for systems with
networking.
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Here are some patches to the gen68360 BSP. The improvements include:
Boot prom run-time selection of DRAM size (1/4/16 Mbytes)
Full 32-bit ethernet address obtained from boot prom.
Updated README.
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was done based on the 3.6.0 release and had to be autoconf'ed locally.
It is turned on is the bsp enables it and it is not explicitly disabled
via the configure option --disable-tcpip. As many warnings as possible
were removed locally after the code was merged. Only the gen68360
and mvme136 bsps were compiled this way.
The ka9q port and network driver were submitted by Eric Norum
(eric@skatter.USask.Ca).
The network demo programs are not included in the tree at this point.
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Contact information:
W. Eric Norum
Saskatchewan Accelerator Laboratory
107 North Road
University of Saskatchewan
Saskatoon, Saskatchewan, CANADA
S7N 5C6
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