diff options
Diffstat (limited to 'src/mem/cache/tags')
| -rw-r--r-- | src/mem/cache/tags/base.hh | 12 | ||||
| -rw-r--r-- | src/mem/cache/tags/base_set_assoc.hh | 12 | ||||
| -rw-r--r-- | src/mem/cache/tags/fa_lru.cc | 10 | ||||
| -rw-r--r-- | src/mem/cache/tags/fa_lru.hh | 7 |
4 files changed, 32 insertions, 9 deletions
diff --git a/src/mem/cache/tags/base.hh b/src/mem/cache/tags/base.hh index 167364ff1..27771982a 100644 --- a/src/mem/cache/tags/base.hh +++ b/src/mem/cache/tags/base.hh @@ -262,12 +262,20 @@ class BaseTags : public ClockedObject } /** - * Find replacement victim based on address. + * Find replacement victim based on address. If the address requires + * blocks to be evicted, their locations are listed for eviction. If a + * conventional cache is being used, the list only contains the victim. + * However, if using sector or compressed caches, the victim is one of + * the blocks to be evicted, but its location is the only one that will + * be assigned to the newly allocated block associated to this address. + * @sa insertBlock * * @param addr Address to find a victim for. + * @param evict_blks Cache blocks to be evicted. * @return Cache block to be replaced. */ - virtual CacheBlk* findVictim(Addr addr) = 0; + virtual CacheBlk* findVictim(Addr addr, std::vector<CacheBlk*>& evict_blks) + const = 0; virtual CacheBlk* accessBlock(Addr addr, bool is_secure, Cycles &lat) = 0; diff --git a/src/mem/cache/tags/base_set_assoc.hh b/src/mem/cache/tags/base_set_assoc.hh index 475566268..d19a00ed9 100644 --- a/src/mem/cache/tags/base_set_assoc.hh +++ b/src/mem/cache/tags/base_set_assoc.hh @@ -200,12 +200,15 @@ class BaseSetAssoc : public BaseTags ReplaceableEntry* findBlockBySetAndWay(int set, int way) const override; /** - * Find replacement victim based on address. + * Find replacement victim based on address. The list of evicted blocks + * only contains the victim. * * @param addr Address to find a victim for. + * @param evict_blks Cache blocks to be evicted. * @return Cache block to be replaced. */ - CacheBlk* findVictim(Addr addr) override + CacheBlk* findVictim(Addr addr, std::vector<CacheBlk*>& evict_blks) const + override { // Get possible locations for the victim block std::vector<CacheBlk*> locations = getPossibleLocations(addr); @@ -215,6 +218,9 @@ class BaseSetAssoc : public BaseTags std::vector<ReplaceableEntry*>( locations.begin(), locations.end()))); + // There is only one eviction for this replacement + evict_blks.push_back(victim); + DPRINTF(CacheRepl, "set %x, way %x: selecting blk for replacement\n", victim->set, victim->way); @@ -230,7 +236,7 @@ class BaseSetAssoc : public BaseTags * @param addr The addr to a find possible locations for. * @return The possible locations. */ - const std::vector<CacheBlk*> getPossibleLocations(Addr addr) + const std::vector<CacheBlk*> getPossibleLocations(Addr addr) const { return sets[extractSet(addr)].blks; } diff --git a/src/mem/cache/tags/fa_lru.cc b/src/mem/cache/tags/fa_lru.cc index a6e1b3be1..8eab62845 100644 --- a/src/mem/cache/tags/fa_lru.cc +++ b/src/mem/cache/tags/fa_lru.cc @@ -193,9 +193,15 @@ FALRU::findBlockBySetAndWay(int set, int way) const } CacheBlk* -FALRU::findVictim(Addr addr) +FALRU::findVictim(Addr addr, std::vector<CacheBlk*>& evict_blks) const { - return tail; + // The victim is always stored on the tail for the FALRU + FALRUBlk* victim = tail; + + // There is only one eviction for this replacement + evict_blks.push_back(victim); + + return victim; } void diff --git a/src/mem/cache/tags/fa_lru.hh b/src/mem/cache/tags/fa_lru.hh index 22b67c534..b134417b5 100644 --- a/src/mem/cache/tags/fa_lru.hh +++ b/src/mem/cache/tags/fa_lru.hh @@ -195,12 +195,15 @@ class FALRU : public BaseTags ReplaceableEntry* findBlockBySetAndWay(int set, int way) const override; /** - * Find replacement victim based on address. + * Find replacement victim based on address. The list of evicted blocks + * only contains the victim. * * @param addr Address to find a victim for. + * @param evict_blks Cache blocks to be evicted. * @return Cache block to be replaced. */ - CacheBlk* findVictim(Addr addr) override; + CacheBlk* findVictim(Addr addr, std::vector<CacheBlk*>& evict_blks) const + override; /** * Insert the new block into the cache and update replacement data. |