From ec152d814af82524cf68df95d7f06b9b70c0d0d0 Mon Sep 17 00:00:00 2001
From: Alejandro Soto <alejandro@34project.org>
Date: Sat, 15 Oct 2022 19:31:55 -0600
Subject: Rework bus architecture

---
 tb/avalon.impl.hpp | 29 +++++++++++++++++++----------
 1 file changed, 19 insertions(+), 10 deletions(-)

(limited to 'tb/avalon.impl.hpp')

diff --git a/tb/avalon.impl.hpp b/tb/avalon.impl.hpp
index cc371a7..60f36a4 100644
--- a/tb/avalon.impl.hpp
+++ b/tb/avalon.impl.hpp
@@ -24,18 +24,33 @@ namespace taller::avalon
 	template<class Platform>
 	void interconnect<Platform>::tick(bool clk)
 	{
+		if(active)
+		{
+			assert(avl_address == plat.avl_address);
+			assert(avl_read == plat.avl_read);
+			assert(avl_write == plat.avl_write);
+			assert(avl_writedata == plat.avl_writedata);
+			assert(avl_byteenable == plat.avl_byteenable);
+		}
+
 		if(!clk)
+		{
+			if(!plat.avl_waitrequest)
+			{
+				active = nullptr;
+			}
+
+			return;
+		} else if(!active)
 		{
 			avl_address = plat.avl_address;
 			avl_read = plat.avl_read;
 			avl_write = plat.avl_write;
 			avl_writedata = plat.avl_writedata;
 			avl_byteenable = plat.avl_byteenable;
-			return;
-		}
 
-		if(!active)
-		{
+			assert(!avl_read || !avl_write);
+
 			if(avl_address & 0b11)
 			{
 				fprintf(stderr, "[avl] unaligned address: 0x%08x\n", avl_address);
@@ -59,7 +74,6 @@ namespace taller::avalon
 			}
 		}
 
-		assert(!avl_read || !avl_write);
 		auto pos = (avl_address & ~active->address_mask()) >> 2;
 
 		if(avl_read)
@@ -69,11 +83,6 @@ namespace taller::avalon
 		{
 			plat.avl_waitrequest = !active->write(pos, avl_writedata, avl_byteenable);
 		}
-
-		if(!plat.avl_waitrequest)
-		{
-			active = nullptr;
-		}
 	}
 }
 
-- 
cgit v1.2.3