I can not find the files 'SpTraceVcdC.h' and 'SpTraceVcdC.cpp' on current SVN repository. It said following error messages when I build the cycle-accurate model.

\tSpTraceVcdC

make[1]: Entering directory `/home/anserine/IP/openrisc/orpsocv2/sim/vlt'
make[1]: *** No rule to make target `SpTraceVcdC.o'. Stop.
make[1]: Leaving directory `/home/anserine/IP/openrisc/orpsocv2/sim/vlt'
make: *** [vlt-modules-compile] Error 2

I take it you have just downloaded the latest version of Verilator (3.800) to use with ORPSoCv2?

I suggest doing an svn update - I fixed this today. Revision 70 of ORPSoCv2 will work with the latest verilator:

When I build the cycle-accurate model, it can not find the sram.vmem files to build the testbench. This is the patch file for Cygwin with verilator 3.80.

It is assumed you that the user is in the sim/run dir when running any of those tests. Are you trying to run the tests from the sim/bin path? The scripts are not designed to do that.

I just type 'make vlt-tests'. It will build the cycle-accurate model, and run the testbench in the meanwhile. It reports that it can not find the sram.vmem file.

It's working fine for me. Can you confirm you are doing a "make vlt-tests" under the sim/run path?
If you are still having issues, can you give me more information such as which test it is trying to run (it will print "Current test:" for each one) and any output indicating an error occurred.

Sorry, it's my fault. I run the "make vlt-tests" under the sim/bin path.