mem-cache: Remove Packet dependency in Tags

Decouple Tags from Packets, only extracting the necessary
functionality for block insertion. As a side effect, create
a new function to update common insertion statistics.

Change-Id: I5c58f7c17de3255beee531f72a3fd25a30d74c90
Reviewed-on: https://gem5-review.googlesource.com/c/11098
Reviewed-by: Jason Lowe-Power <jason@lowepower.com>
Reviewed-by: Nikos Nikoleris <nikos.nikoleris@arm.com>
Maintainer: Jason Lowe-Power <jason@lowepower.com>

src/mem/cache/base.cc

@@ -1280,7 +1280,8 @@ BaseCache::allocateBlock(const PacketPtr pkt, PacketList &writebacks)
     }
 
     // Insert new block at victimized entry
-    tags->insertBlock(pkt, victim);
+    tags->insertBlock(addr, is_secure, pkt->req->masterId(),
+                      pkt->req->taskId(), victim);
 
     return victim;
 }

src/mem/cache/tags/base.cc

@@ -52,7 +52,6 @@
 
 #include "base/types.hh"
 #include "mem/cache/base.hh"
-#include "mem/packet.hh"
 #include "mem/request.hh"
 #include "sim/core.hh"
 #include "sim/sim_exit.hh"
@@ -80,25 +79,22 @@ BaseTags::setCache(BaseCache *_cache)
 }
 
 void
-BaseTags::insertBlock(const PacketPtr pkt, CacheBlk *blk)
+BaseTags::insertBlock(const Addr addr, const bool is_secure,
+                      const int src_master_ID, const uint32_t task_ID,
+                      CacheBlk *blk)
 {
     assert(!blk->isValid());
 
-    // Get address
-    Addr addr = pkt->getAddr();
-
     // Previous block, if existed, has been removed, and now we have
     // to insert the new one
-
     // Deal with what we are bringing in
-    MasterID master_id = pkt->req->masterId();
-    assert(master_id < cache->system->maxMasters());
-    occupancies[master_id]++;
+    assert(src_master_ID < cache->system->maxMasters());
+    occupancies[src_master_ID]++;
 
     // Insert block with tag, src master id and task id
-    blk->insert(extractTag(addr), pkt->isSecure(), master_id,
-                pkt->req->taskId());
+    blk->insert(extractTag(addr), is_secure, src_master_ID, task_ID);
 
+    // Check if cache warm up is done
     if (!warmedUp && tagsInUse.value() >= warmupBound) {
         warmedUp = true;
         warmupCycle = curTick();

src/mem/cache/tags/base.hh

@@ -58,7 +58,6 @@
 #include "base/statistics.hh"
 #include "base/types.hh"
 #include "mem/cache/blk.hh"
-#include "mem/packet.hh"
 #include "params/BaseTags.hh"
 #include "sim/clocked_object.hh"
 
@@ -285,10 +284,15 @@ class BaseTags : public ClockedObject
     /**
      * Insert the new block into the cache and update stats.
      *
-     * @param pkt Packet holding the address to update
+     * @param addr Address of the block.
+     * @param is_secure Whether the block is in secure space or not.
+     * @param src_master_ID The source requestor ID.
+     * @param task_ID The new task ID.
      * @param blk The block to update.
      */
-    virtual void insertBlock(const PacketPtr pkt, CacheBlk *blk);
+    virtual void insertBlock(const Addr addr, const bool is_secure,
+                             const int src_master_ID, const uint32_t task_ID,
+                             CacheBlk *blk);
 
     /**
      * Regenerate the block address.

src/mem/cache/tags/base_set_assoc.hh

@@ -60,7 +60,6 @@
 #include "mem/cache/replacement_policies/base.hh"
 #include "mem/cache/tags/base.hh"
 #include "mem/cache/tags/cacheset.hh"
-#include "mem/packet.hh"
 #include "params/BaseSetAssoc.hh"
 
 /**
@@ -245,13 +244,18 @@ class BaseSetAssoc : public BaseTags
     /**
      * Insert the new block into the cache and update replacement data.
      *
-     * @param pkt Packet holding the address to update
+     * @param addr Address of the block.
+     * @param is_secure Whether the block is in secure space or not.
+     * @param src_master_ID The source requestor ID.
+     * @param task_ID The new task ID.
      * @param blk The block to update.
      */
-    void insertBlock(const PacketPtr pkt, CacheBlk *blk) override
+    void insertBlock(const Addr addr, const bool is_secure,
+                     const int src_master_ID, const uint32_t task_ID,
+                     CacheBlk *blk) override
     {
         // Insert block
-        BaseTags::insertBlock(pkt, blk);
+        BaseTags::insertBlock(addr, is_secure, src_master_ID, task_ID, blk);
 
         // Increment tag counter
         tagsInUse++;

src/mem/cache/tags/fa_lru.cc

@@ -208,7 +208,9 @@ FALRU::findVictim(Addr addr, const bool is_secure,
 }
 
 void
-FALRU::insertBlock(const PacketPtr pkt, CacheBlk *blk)
+FALRU::insertBlock(const Addr addr, const bool is_secure,
+                   const int src_master_ID, const uint32_t task_ID,
+                   CacheBlk *blk)
 {
     FALRUBlk* falruBlk = static_cast<FALRUBlk*>(blk);
 
@@ -216,7 +218,7 @@ FALRU::insertBlock(const PacketPtr pkt, CacheBlk *blk)
     assert(falruBlk->inCachesMask == 0);
 
     // Do common block insertion functionality
-    BaseTags::insertBlock(pkt, blk);
+    BaseTags::insertBlock(addr, is_secure, src_master_ID, task_ID, blk);
 
     // Increment tag counter
     tagsInUse++;

src/mem/cache/tags/fa_lru.hh

@@ -62,7 +62,6 @@
 #include "base/types.hh"
 #include "mem/cache/blk.hh"
 #include "mem/cache/tags/base.hh"
-#include "mem/packet.hh"
 #include "params/FALRU.hh"
 
 // Uncomment to enable sanity checks for the FALRU cache and the
@@ -214,10 +213,15 @@ class FALRU : public BaseTags
     /**
      * Insert the new block into the cache and update replacement data.
      *
-     * @param pkt Packet holding the address to update
+     * @param addr Address of the block.
+     * @param is_secure Whether the block is in secure space or not.
+     * @param src_master_ID The source requestor ID.
+     * @param task_ID The new task ID.
      * @param blk The block to update.
      */
-    void insertBlock(const PacketPtr pkt, CacheBlk *blk) override;
+    void insertBlock(const Addr addr, const bool is_secure,
+                     const int src_master_ID, const uint32_t task_ID,
+                     CacheBlk *blk) override;
 
     /**
      * Generate the tag from the addres. For fully associative this is just the

src/mem/cache/tags/sector_tags.cc

@@ -194,10 +194,12 @@ SectorTags::getPossibleLocations(Addr addr) const
 }
 
 void
-SectorTags::insertBlock(const PacketPtr pkt, CacheBlk *blk)
+SectorTags::insertBlock(const Addr addr, const bool is_secure,
+                        const int src_master_ID, const uint32_t task_ID,
+                        CacheBlk *blk)
 {
-    // Insert block
-    BaseTags::insertBlock(pkt, blk);
+    // Do common block insertion functionality
+    BaseTags::insertBlock(addr, is_secure, src_master_ID, task_ID, blk);
 
     // Get block's sector
     SectorSubBlk* sub_blk = static_cast<SectorSubBlk*>(blk);

src/mem/cache/tags/sector_tags.hh

@@ -41,7 +41,6 @@
 
 #include "mem/cache/sector_blk.hh"
 #include "mem/cache/tags/base.hh"
-#include "mem/packet.hh"
 #include "params/SectorTags.hh"
 
 class BaseReplacementPolicy;
@@ -150,10 +149,15 @@ class SectorTags : public BaseTags
     /**
      * Insert the new block into the cache and update replacement data.
      *
-     * @param pkt Packet holding the address to update
+     * @param addr Address of the block.
+     * @param is_secure Whether the block is in secure space or not.
+     * @param src_master_ID The source requestor ID.
+     * @param task_ID The new task ID.
      * @param blk The block to update.
      */
-    void insertBlock(const PacketPtr pkt, CacheBlk *blk) override;
+    void insertBlock(const Addr addr, const bool is_secure,
+                     const int src_master_ID, const uint32_t task_ID,
+                     CacheBlk *blk) override;
 
     /**
      * Finds the given address in the cache, do not update replacement data.