What is the purpose of Router map rules in top module.

[tayyabshaikh]

I want to confirm what is the purpose of Router00Map, Router01Map, Router10Map and Router11Map in 2x2 ID Based Mesh, and what is the pattern in which they get generated.
For Example:

localparam int unsigned Router00MapNumRules = 4;

typedef struct packed {
    id_t idx;
    id_t start_addr;
    id_t end_addr;
} router_0_0_map_rule_t;

localparam router_0_0_map_rule_t[Router00MapNumRules-1:0] Router00Map = '{
'{idx: 2, start_addr: 0, end_addr: 1},// cluster_ni_0_0
'{idx: 0, start_addr: 1, end_addr: 2},// cluster_ni_0_1
'{idx: 0, start_addr: 3, end_addr: 4},// cluster_ni_1_1
'{idx: 1, start_addr: 2, end_addr: 3} // cluster_ni_1_0

};