static void alloc_routing_structs(struct s_router_opts router_opts,
struct s_det_routing_arch det_routing_arch, t_segment_inf *segment_inf,
t_timing_inf timing_inf, t_subblock_data subblock_data) {
int bb_factor;
/*calls routines that set up routing resource graph and associated structures*/
/*must set up dummy blocks for the first pass through*/
assign_locations(CLB, 1, 1, CLB, nx, ny);
clb_opins_used_locally = alloc_route_structs(subblock_data);
free_rr_graph();
build_rr_graph(router_opts.route_type, det_routing_arch, segment_inf,
timing_inf, router_opts.base_cost_type);
alloc_and_load_rr_node_route_structs();
alloc_timing_driven_route_structs(&pin_criticality, &sink_order,
&rt_node_of_sink);
bb_factor = nx + ny; /*set it to a huge value*/
init_route_structs(bb_factor);
}
boolean try_route (int width_fac, struct s_router_opts router_opts, struct
s_det_routing_arch det_routing_arch, t_segment_inf *segment_inf,
t_timing_inf timing_inf, float **net_slack, float **net_delay,
t_chan_width_dist chan_width_dist, t_ivec **clb_opins_used_locally) {
/* Attempts a routing via an iterated maze router algorithm. Width_fac *
* specifies the relative width of the channels, while the members of *
* router_opts determine the value of the costs assigned to routing *
* resource node, etc. det_routing_arch describes the detailed routing *
* architecture (connection and switch boxes) of the FPGA; it is used *
* only if a DETAILED routing has been selected. */
boolean success;
printf("\nAttempting routing with a width factor (usually maximum channel ");
printf("width) of %d.\n",width_fac);
/* Set the channel widths */
init_chan (width_fac, chan_width_dist);
/* Free any old routing graph, if one exists. */
free_rr_graph ();
/* Set up the routing resource graph defined by this FPGA architecture. */
build_rr_graph (router_opts.route_type, det_routing_arch, segment_inf,
timing_inf, router_opts.base_cost_type);
/* Allocate and load some additional rr_graph information needed only by *
* the router. */
alloc_and_load_rr_node_route_structs ();
init_route_structs (router_opts.bb_factor);
if (router_opts.router_algorithm == BREADTH_FIRST)
success = try_breadth_first_route (router_opts, clb_opins_used_locally);
else /* TIMING_DRIVEN route */
success = try_timing_driven_route (router_opts, net_slack, net_delay,
clb_opins_used_locally);
free_rr_node_route_structs ();
return (success);
}
static void
alloc_routing_structs(struct s_router_opts router_opts,
struct s_det_routing_arch det_routing_arch,
t_segment_inf * segment_inf,
t_timing_inf timing_inf)
{
int bb_factor;
int warnings;
t_graph_type graph_type;
/*calls routines that set up routing resource graph and associated structures */
/*must set up dummy blocks for the first pass through to setup locally used opins */
/* Only one block per tile */
assign_locations(FILL_TYPE, 1, 1, 0, FILL_TYPE, nx, ny, 0);
clb_opins_used_locally = alloc_route_structs();
free_rr_graph();
if(router_opts.route_type == GLOBAL) {
graph_type = GRAPH_GLOBAL;
} else {
graph_type = (det_routing_arch.directionality ==
BI_DIRECTIONAL ? GRAPH_BIDIR : GRAPH_UNIDIR);
}
build_rr_graph(graph_type, num_types, dummy_type_descriptors, nx,
ny, grid, chan_width_x[0], NULL,
det_routing_arch.switch_block_type,
det_routing_arch.Fs, det_routing_arch.num_segment, det_routing_arch.num_switch,
segment_inf, det_routing_arch.global_route_switch,
det_routing_arch.delayless_switch, timing_inf,
det_routing_arch.wire_to_ipin_switch,
router_opts.base_cost_type, &warnings);
alloc_and_load_rr_node_route_structs();
alloc_timing_driven_route_structs(&pin_criticality, &sink_order,
&rt_node_of_sink);
bb_factor = nx + ny; /*set it to a huge value */
init_route_structs(bb_factor);
}
boolean
try_route(int width_fac,
struct s_router_opts router_opts,
struct s_det_routing_arch det_routing_arch,
t_segment_inf * segment_inf,
t_timing_inf timing_inf,
float **net_slack,
float **net_delay,
t_chan_width_dist chan_width_dist,
t_ivec ** fb_opins_used_locally,
t_mst_edge ** mst,
boolean * Fc_clipped)
{
/* Attempts a routing via an iterated maze router algorithm. Width_fac *
* specifies the relative width of the channels, while the members of *
* router_opts determine the value of the costs assigned to routing *
* resource node, etc. det_routing_arch describes the detailed routing *
* architecture (connection and switch boxes) of the FPGA; it is used *
* only if a DETAILED routing has been selected. */
int tmp;
boolean success;
t_graph_type graph_type;
if(router_opts.route_type == GLOBAL) {
graph_type = GRAPH_GLOBAL;
} else {
graph_type = (det_routing_arch.directionality ==
BI_DIRECTIONAL ? GRAPH_BIDIR : GRAPH_UNIDIR);
}
/* Set the channel widths */
init_chan(width_fac, chan_width_dist);
/* Free any old routing graph, if one exists. */
free_rr_graph();
/* Set up the routing resource graph defined by this FPGA architecture. */
build_rr_graph(graph_type,
num_types, type_descriptors, nx, ny, grid,
chan_width_x[0], NULL,
det_routing_arch.switch_block_type, det_routing_arch.Fs,
det_routing_arch.num_segment, det_routing_arch.num_switch, segment_inf,
det_routing_arch.global_route_switch,
det_routing_arch.delayless_switch, timing_inf,
det_routing_arch.wire_to_ipin_switch,
router_opts.base_cost_type, &tmp);
/* Allocate and load some additional rr_graph information needed only by *
* the router. */
alloc_and_load_rr_node_route_structs();
init_route_structs(router_opts.bb_factor);
if(router_opts.router_algorithm == BREADTH_FIRST)
{
printf("Confirming Router Algorithm: BREADTH_FIRST.\n");
success =
try_breadth_first_route(router_opts, fb_opins_used_locally,
width_fac);
}
else if(router_opts.router_algorithm == TIMING_DRIVEN)
{ /* TIMING_DRIVEN route */
printf("Confirming Router Algorithm: TIMING_DRIVEN.\n");
assert(router_opts.route_type != GLOBAL);
success =
try_timing_driven_route(router_opts, net_slack, net_delay,
fb_opins_used_locally);
}
else
{ /* Directed Search Routability Driven */
printf("Confirming Router Algorithm: DIRECTED_SEARCH.\n");
success =
try_directed_search_route(router_opts, fb_opins_used_locally,
width_fac, mst);
}
free_rr_node_route_structs();
return (success);
}
