From: Luke Kenneth Casson Leighton <lkcl@lkcl.net>
Date: Sat, 16 Apr 2022 22:03:27 +0000 (+0100)
Subject: reduce dcache/icache number of ways, to fit into ECP5 45k resource
X-Git-Url: https://git.libre-soc.org/?p=soc.git;a=commitdiff_plain;h=239bbdefc79ddf27d282072d3dc73e14823c8611

reduce dcache/icache number of ways, to fit into ECP5 45k resource
---

diff --git a/src/soc/experiment/dcache.py b/src/soc/experiment/dcache.py
index f2e4360a..39578ebc 100644
--- a/src/soc/experiment/dcache.py
+++ b/src/soc/experiment/dcache.py
@@ -747,10 +747,10 @@ class DCache(Elaboratable, DCacheConfig):
 
         if self.microwatt_compat:
             # reduce way sizes and num lines
-            super().__init__(NUM_LINES = 4,
+            super().__init__(NUM_LINES = 2,
                               NUM_WAYS = 1,
                               TLB_NUM_WAYS = 1,
-                              TLB_SET_SIZE=4) # XXX needs device-tree entry
+                              TLB_SET_SIZE=2) # XXX needs device-tree entry
         else:
             super().__init__()
 
diff --git a/src/soc/experiment/icache.py b/src/soc/experiment/icache.py
index e9c8ed1b..b0b674c8 100644
--- a/src/soc/experiment/icache.py
+++ b/src/soc/experiment/icache.py
@@ -345,9 +345,9 @@ class ICache(FetchUnitInterface, Elaboratable, ICacheConfig):
             # reduce way sizes and num lines
             ICacheConfig.__init__(self, LINE_SIZE=XLEN,
                                         XLEN=XLEN,
-                                        NUM_LINES = 4,
+                                        NUM_LINES = 2,
                                         NUM_WAYS = 1,
-                                        TLB_SIZE=4 # needs device-tree update
+                                        TLB_SIZE=2 # needs device-tree update
                                  )
         else:
             ICacheConfig.__init__(self, LINE_SIZE=XLEN, XLEN=XLEN)