L1:
ast case cbk cov dut flist fay refm sim tb uvm readme(file)
L2/3/more:
refm -> xxx -> src refm -> xxx -> doc refm -> xxx -> test
sim ->makefile(linkfile)
sim -> cov
sim -> log -> ast sim -> log -> cov sim -> log -> irun
sim -> misc -> testdir
sim -> script. -> assert.tcl
sim -> script. -> covifle.ccf
sim -> script. -> sva_merge.pl
sim -> script. -> cov_iccr.cmd
sim -> script. -> makefile(source of sim -> makefile)
tb -> xxx_tb.sv tb -> xxx_virtual_sequnce.sv tb -> xxx_virtual_sequncer.sv tb -> top.sv
uvc-> cpu-> src uvc-> cpu-> doc uvc-> cpu-> test
uvc-> rst-> src uvc-> rst-> doc uvc-> rst-> test
uvc-> ral-> src uvc-> ral-> doc uvc-> ral-> test
uvc-> scb-> src uvc-> scb-> doc uvc-> scb-> test
uvc-> xxx-> src uvc-> xxx-> doc uvc-> xxx-> test