[ixp1200] rcv_rdy_lo with workbench vs without

[Michael Burns]

Hello all,

I've been having trouble using the workbench to run the ingress interface 
aces (of the SDK) while debugging. I can successfully run the various 
tutorials and the L3 forwarding ace without debugging them by using the 
ixstart scripts with mode = 0. When I use mode = 1 and use the workbench 
to debug, the microaces run as if no packets were being received. 

Inspection of the code (and some added debugging routines) show that when 
the workbench is not running, incoming data on ports 0-3 are reflected in 
bits 0-3 of the rcv_rdy_lo CSR. However, if I use the workbench to upload 
the code and run it, bits 8-11 of rcv_rdy_lo reflect the activity on 
ports 0-3. This of course prevents packets from being received [the code 
looks at ((rcv_rdy_lo >> port_num) & 1) for activity]. I'm pretty sure all 
the variables/symbols are being patched correctly.

Does anybody have any ideas what could cause this discrepancy? I'm using 
an ENP-2505 board with 4 100Mb ports. Thanks for any help.

-Michael Burns
UCLA LASR