  We compare the dark matter(DM) production processes and its parameters space
in the background of reheating obtained from two chief systems in the early
Universe: the inflaton $\phi$ and the primordial black holes (PBHs). We
concentrated on the mechanism where DMs are universally produced only from the
PBH decay and the generation of the standard model plasma from both inflton and
PBHs. Whereas the distribution of Primordial Black Holes behaves like dust, the
inflaton phenomenology depends strongly on its equation of state after the
inflationary phase, which in turn is conditioned by the nature of the potential
$V(\phi)$. Depending upon the initial mass and population of PBHs, a large
range of DM mass is shown to be viable if reheating is controlled by PBHs
itself. Inflaton-dominated reheating is observed to further widen such
possibilities depending on the initial population of black holes and its mass
as well as the coupling of the inflaton to the standard model sector.
