Subversion Repositories openrisc_2011-10-31

#ifndef MEM_CACHE__H

#ifndef MEM_CACHE__H

#define MEM_CACHE__H

#define MEM_CACHE__H

#include <stdint.h>

#include <stdint.h>

//! Module for cacheing memory accesses by the debug unit

//! Module for cacheing memory accesses by the debug unit

//! Memory reads and writes through the Debug Unit via JTAG are time

//! Memory reads and writes through the Debug Unit via JTAG are time

//! consuming - of the order of 1000 CPU clock cycles. However when the

//! consuming - of the order of 1000 CPU clock cycles. However when the

//! processor is stalled the values cannot change, other than through the

//! processor is stalled the values cannot change, other than through the

//! a closed hash table.

//! a closed hash table.

//! In the event of a clash on write, the old value is replaced by the new

//! In the event of a clash on write, the old value is replaced by the new

//! value.

//! value.

public:

public:

  // Constructor and destructor

  // Constructor and destructor

  MemCache (int  _tableSize = 1009);

  MemCache (int  _tableSize = 1009);

  ~MemCache ();

  ~MemCache ();

  // Functions

  // Functions

  void  clear ();

  void  clear ();

private:

private:

  //! The size of the hash table. A prime number is a good choice.

  //! The size of the hash table. A prime number is a good choice.

  int  tableSize;

  int  tableSize;

  // allowing unambiguous clearing by use of memset for efficiency.

  // allowing unambiguous clearing by use of memset for efficiency.

  bool     *tabIsValid;

  bool     *tabIsValid;

  uint32_t *tabKeyAddr;

  uint32_t *tabKeyAddr;

  uint32_t *tabValue;

  uint32_t *tabValue;

};      // MemCache ()

};      // MemCache ()

#endif  // MEM_CACHE__H

#endif  // MEM_CACHE__H

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