[Tf-a-tests] Any manuals for SMMUv3 Test Engine?

Hi All,

I find that in spm/cactus/cactus_tests/smmuv3_test_engine.h, the tf-a-tests clearly shows some MMIO interfaces for the SMMUv3 Test Engine. But, I need help finding a manual about these MMIO interfaces. For example, in this .h file, it says the offset of the start address is in 0x28 (BEGIN_OFF), but I cannot find which manual defines it. It refers to the "SMMUv3TestEngine - trace" Section on FVP manual, but I still cannot find the mapping in this section. Actually I don't know how to "understand" the trace Section.

I also try to dump the FVP model but I can not find it. It only has SMMU configurations, but not this engine.

Can someone help me?

Sincerely, WANG Chenxu