From 9bf55b70a85e5c12e9cfd0b8c7e1eaf1c05a6c1c Mon Sep 17 00:00:00 2001
From: Alejandro Soto <alejandro@34project.org>
Date: Tue, 13 Feb 2024 07:22:01 -0600
Subject: rtl/cache: fix critical bus protocol bug when caches are disabled

cache_core_waitrequest must be always high when caches are disabled.
Otherwise, cache_routing won't raise core_waitrequest on the idle state.
---
 rtl/cache/cache.sv | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'rtl/cache')

diff --git a/rtl/cache/cache.sv b/rtl/cache/cache.sv
index f525373..465da08 100644
--- a/rtl/cache/cache.sv
+++ b/rtl/cache/cache.sv
@@ -144,7 +144,7 @@ module cache
 
 			assign cache_mem_read = 0;
 			assign cache_mem_write = 0;
-			assign cache_core_waitrequest = 0;
+			assign cache_core_waitrequest = 1;
 
 			if (`CONFIG_CACHE) begin: null_ring
 				assign in_data_ready = out_data_ready;
-- 
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