[topgen/tlgen] Multi-tiered Xbar
The script is to support multi-tiered crossbars on top_earlgrey.
Now any crossbar can have connections to other crossbars. It is allowed
only one connection between two crossbars at this time.
If `xbar: "true"` is defined in the node, the tool does below:
- Recognize it as a crossbar connection
- Gather downstream addresses and calculate the common address range (*)
- If device is a port to another crossbar, the address steering compares
list of address range not a single `address_from`, `address_to`
Signed-off-by: Eunchan Kim <eunchan@opentitan.org>
diff --git a/hw/top_earlgrey/data/top_earlgrey.sv.tpl b/hw/top_earlgrey/data/top_earlgrey.sv.tpl
index c0f3207..f41c7a1 100644
--- a/hw/top_earlgrey/data/top_earlgrey.sv.tpl
+++ b/hw/top_earlgrey/data/top_earlgrey.sv.tpl
@@ -102,6 +102,22 @@
tl_d2h_t tl_${m["name"]}_d_d2h;
% endfor
+## Xbar connection
+% for xbar in top["xbar"]:
+<%
+ xbar_devices = [x for x in xbar["nodes"] if x["type"] == "device" and x["xbar"]]
+%>\
+ % for node in xbar_devices:
+ tl_h2d_t tl_${xbar["name"]}_h_h2d;
+ tl_d2h_t tl_${xbar["name"]}_h_d2h;
+ tl_h2d_t tl_${node["name"]}_d_h2d;
+ tl_d2h_t tl_${node["name"]}_d_d2h;
+
+ assign tl_${xbar["name"]}_h_h2d = tl_${node["name"]}_d_h2d;
+ assign tl_${node["name"]}_d_d2h = tl_${xbar["name"]}_h_d2h;
+ % endfor
+% endfor
+
//reset wires declaration
% for reset in top['resets']:
logic ${reset['name']}_rst_n;
@@ -622,8 +638,8 @@
% endfor
.scanmode_i
-% endfor
);
+% endfor
% if "pinmux" in top:
// Pinmux connections
