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[/] [openrisc/] [trunk/] [orpsocv2/] [rtl/] [verilog/] [or1200/] [or1200_du.v] - Rev 815

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815 OR1200 debug unit: prevent deadlock when trap instruction stalls

As per mailing list post <20120925160925.5725e06f@latmask.vernier.se>,
the debug unit could deadlock with the instruction decoder if the trap
instruction is held back by a pipeline stall. This change prevents that.

The problem can be reproduced by placing a breakpoint at an unfavorable
position with instruction cache enabled. In our test, this occurred
with or1200-cbasic when placing a breakpoint at test_bss using gdb, but
this is dependent on such factors as cache parameters and compilation
result.
yannv 4433d 08h /openrisc/trunk/orpsocv2/rtl/verilog/or1200/or1200_du.v
363 ORPSoC's RTL code fixed to pass linting by Verilator.

ORPSoC's debug interface disabled for now in both RTL and System C top level.

Profiled building of cycle-accurate model now done correctly.
julius 5186d 10h /openrisc/trunk/orpsocv2/rtl/verilog/or1200/or1200_du.v
360 First checkin of new ORPSoC set up - more to come, all but RTL tests temporarily broken julius 5188d 00h /openrisc/trunk/orpsocv2/rtl/verilog/or1200/or1200_du.v
358 OR1200's reset now configurable as active high or active low. Thanks to patch
from OpenCores contributor Kuoping.

Updated OR1200 in ORPSoCv2 and OR1200 project.
julius 5188d 09h /openrisc/trunk/orpsocv2/rtl/verilog/components/or1200/or1200_du.v
350 Adding new OR1200 processor to ORPSoCv2 julius 5191d 04h /openrisc/trunk/orpsocv2/rtl/verilog/components/or1200/or1200_du.v

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