mem-cache: Create Sector Cache

Implementation of Sector Caches, i.e., a cache with multiple
sequential data entries per tag entry for Set Associtive
placement policies.

Change-Id: I8e1e9448fa44ba308ccb16cd5bcc5fd36c988feb
Reviewed-on: https://gem5-review.googlesource.com/9741
Reviewed-by: Nikos Nikoleris <nikos.nikoleris@arm.com>
Maintainer: Nikos Nikoleris <nikos.nikoleris@arm.com>

1 files changed, 16 insertions, 0 deletions

diff --git a/src/mem/cache/tags/Tags.py b/src/mem/cache/tags/Tags.py
index 76cd8d6b9..8fdfdce61 100644
--- a/src/mem/cache/tags/Tags.py
+++ b/src/mem/cache/tags/Tags.py
@@ -67,12 +67,28 @@ class BaseTags(ClockedObject):
 class BaseSetAssoc(BaseTags):
     type = 'BaseSetAssoc'
     cxx_header = "mem/cache/tags/base_set_assoc.hh"
+
+    # Get the cache associativity
     assoc = Param.Int(Parent.assoc, "associativity")
 
     # Get replacement policy from the parent (cache)
     replacement_policy = Param.BaseReplacementPolicy(
         Parent.replacement_policy, "Replacement policy")
 
+class SectorTags(BaseTags):
+    type = 'SectorTags'
+    cxx_header = "mem/cache/tags/sector_tags.hh"
+
+    # Get the cache associativity
+    assoc = Param.Int(Parent.assoc, "associativity")
+
+    # Number of sub-sectors (data blocks) per sector
+    num_blocks_per_sector = Param.Int(1, "Number of sub-sectors per sector");
+
+    # Get replacement policy from the parent (cache)
+    replacement_policy = Param.BaseReplacementPolicy(
+        Parent.replacement_policy, "Replacement policy")
+
 class FALRU(BaseTags):
     type = 'FALRU'
     cxx_class = 'FALRU'