OpenXiangShan
FPGA: Add the function of fpga core difftest
When using fpga to carry out difftest, difftest will read out the architecture related information from the dma interface as a host program, and check the register on the PC side.
usage make fpga-build，./fpga-host --diff=nemu.so
The idea of this function comes from the revision of encore. Thanks to the support of Teacher Shi Kan and Xu Shuoxiang for providing the XDMA initialization code (f7f0f8b), and Zhang Shoulin for helping debug the FPGA
Co-authored-by: fengkehan [email protected] Co-authored-by: xushuoxiang [email protected] Co-authored-by: zhangshoulin [email protected]
您好，想问一下，目前difftest环境和encore能结合起来吗？我看到encore的流程里在生成snapshot，可以进一步在仿真环境里运行，这里是否可以用difftest来跑？另外，目前fpga上的difftest环境运行时速度跟encore比哪个更快呢？
您好，想问一下，目前difftest环境和encore能结合起来吗？我看到encore的流程里在生成snapshot，可以
你好，这套系统就是将类似encore的结构做到difftest环境，这套系统目前能传输大约7GB/S的数据，具体运行频率 需要视difftest模式情况而计算，因为不同模式下的difftest产生的数据量不一样
Seems a too large PR. I will carefully review later. (Busy in exames these days). And I think maybe we can seperate it to some commits with detailed message, rather than squashed into a large one. And this PR should also be merged after tests passed in FPGA, even just a simplified subset of DifftestBundle.
Seems a too large PR. I will carefully review later. (Busy in exames these days). And I think maybe we can seperate it to some commits with detailed message, rather than squashed into a large one. And this PR should also be merged after tests passed in FPGA, even just a simplified subset of DifftestBundle.
I have tested and passed some simple workload, so I plan to merge a working version first. If I want to split, the previous commits in this pr will not work.