* Declaration of a fully associative LRU tag store.
*/
-#ifndef __FA_LRU_HH__
-#define __FA_LRU_HH__
+#ifndef __MEM_CACHE_TAGS_FA_LRU_HH__
+#define __MEM_CACHE_TAGS_FA_LRU_HH__
#include <list>
-#include "mem/cache/cache_blk.hh"
-#include "mem/packet.hh"
#include "base/hashmap.hh"
-#include "mem/cache/tags/base_tags.hh"
+#include "mem/cache/blk.hh"
+#include "mem/cache/tags/base.hh"
+#include "mem/packet.hh"
/**
* A fully associative cache block.
typedef FALRUBlk BlkType;
/** Typedef a list of pointers to the local block type. */
typedef std::list<FALRUBlk*> BlkList;
+
protected:
/** The block size of the cache. */
- const int blkSize;
+ const unsigned blkSize;
/** The size of the cache. */
- const int size;
- /** The number of blocks in the cache. */
- const int numBlks; // calculated internally
+ const unsigned size;
/** The hit latency of the cache. */
- const int hitLatency;
+ const unsigned hitLatency;
/** Array of pointers to blocks at the cache size boundaries. */
FALRUBlk **cacheBoundaries;
/** A mask for the FALRUBlk::inCache bits. */
int cacheMask;
/** The number of different size caches being tracked. */
- int numCaches;
+ unsigned numCaches;
/** The cache blocks. */
FALRUBlk *blks;
*/
/** Hits in each cache size >= 128K. */
- Stats::Vector<> hits;
+ Stats::Vector hits;
/** Misses in each cache size >= 128K. */
- Stats::Vector<> misses;
+ Stats::Vector misses;
/** Total number of accesses. */
- Stats::Scalar<> accesses;
+ Stats::Scalar accesses;
/**
* @}
* @param size The size of the cache.
* @param hit_latency The hit latency of the cache.
*/
- FALRU(int blkSize, int size, int hit_latency);
+ FALRU(unsigned blkSize, unsigned size, unsigned hit_latency);
/**
* Register the stats for this object.
void regStats(const std::string &name);
/**
- * Return true if the address is found in the cache.
- * @param asid The address space ID.
- * @param addr The address to look for.
- * @return True if the address is in the cache.
- */
- bool probe(int asid, Addr addr) const;
-
- /**
- * Invalidate the cache block that contains the given addr.
- * @param asid The address space ID.
- * @param addr The address to invalidate.
+ * Invalidate a cache block.
+ * @param blk The block to invalidate.
*/
- void invalidateBlk(int asid, Addr addr);
+ void invalidateBlk(BlkType *blk);
/**
- * Find the block in the cache and update the replacement data. Returns
- * the access latency and the in cache flags as a side effect
+ * Access block and update replacement data. May not succeed, in which case
+ * NULL pointer is returned. This has all the implications of a cache
+ * access and should only be used as such.
+ * Returns the access latency and inCache flags as a side effect.
* @param addr The address to look for.
* @param asid The address space ID.
* @param lat The latency of the access.
* @param inCache The FALRUBlk::inCache flags.
* @return Pointer to the cache block.
*/
- FALRUBlk* findBlock(Addr addr, int asid, int &lat, int *inCache = 0);
-
- /**
- * Find the block in the cache and update the replacement data. Returns
- * the access latency and the in cache flags as a side effect
- * @param req The req whose block to find
- * @param lat The latency of the access.
- * @param inCache The FALRUBlk::inCache flags.
- * @return Pointer to the cache block.
- */
- FALRUBlk* findBlock(Packet * &pkt, int &lat, int *inCache = 0);
+ FALRUBlk* accessBlock(Addr addr, int &lat, int context_src, int *inCache = 0);
/**
* Find the block in the cache, do not update the replacement data.
* @param asid The address space ID.
* @return Pointer to the cache block.
*/
- FALRUBlk* findBlock(Addr addr, int asid) const;
+ FALRUBlk* findBlock(Addr addr) const;
/**
* Find a replacement block for the address provided.
- * @param req The request to a find a replacement candidate for.
+ * @param pkt The request to a find a replacement candidate for.
* @param writebacks List for any writebacks to be performed.
- * @param compress_blocks List of blocks to compress, for adaptive comp.
* @return The block to place the replacement in.
*/
- FALRUBlk* findReplacement(Packet * &pkt, PacketList* & writebacks,
- BlkList &compress_blocks);
+ FALRUBlk* findVictim(Addr addr, PacketList & writebacks);
+
+ void insertBlock(Addr addr, BlkType *blk, int context_src);
/**
* Return the hit latency of this cache.
* Return the block size of this cache.
* @return The block size.
*/
- int getBlockSize()
+ unsigned
+ getBlockSize() const
{
return blkSize;
}
* Return the subblock size of this cache, always the block size.
* @return The block size.
*/
- int getSubBlockSize()
+ unsigned
+ getSubBlockSize() const
{
return blkSize;
}
* Generate the tag from the addres. For fully associative this is just the
* block address.
* @param addr The address to get the tag from.
- * @param blk ignored here
* @return The tag.
*/
- Addr extractTag(Addr addr, FALRUBlk *blk) const
+ Addr extractTag(Addr addr) const
{
return blkAlign(addr);
}
}
/**
- * Read the data out of the internal storage of a cache block. FALRU
- * currently doesn't support data storage.
- * @param blk The cache block to read.
- * @param data The buffer to read the data into.
- * @return The data from the cache block.
+ *iterated through all blocks and clear all locks
+ *Needed to clear all lock tracking at once
*/
- void readData(FALRUBlk *blk, uint8_t *data)
- {
- }
-
- /**
- * Write data into the internal storage of a cache block. FALRU
- * currently doesn't support data storage.
- * @param blk The cache block to be written.
- * @param data The data to write.
- * @param size The number of bytes to write.
- * @param writebacks A list for any writebacks to be performed. May be
- * needed when writing to a compressed block.
- */
- void writeData(FALRUBlk *blk, uint8_t *data, int size,
- PacketList* &writebacks)
- {
- }
-
- /**
- * Unimplemented. Perform a cache block copy from block aligned addresses.
- * @param source The block aligned source address.
- * @param dest The block aligned destination adddress.
- * @param asid The address space ID.
- * @param writebacks List for any generated writeback requests.
- */
- void doCopy(Addr source, Addr dest, int asid, PacketList* &writebacks)
- {
- }
-
- /**
- * Unimplemented.
- */
- void fixCopy(Packet * &pkt, PacketList* &writebacks)
- {
- }
-
+ virtual void clearLocks();
};
-#endif
+#endif // __MEM_CACHE_TAGS_FA_LRU_HH__
projects / gem5.git / blobdiff