ac_cache Class Reference

#include <ac_cache.H>

Inheritance diagram for ac_cache:

[legend]Collaboration diagram for ac_cache:

[legend]List of all members.


Public Member Functions
virtual ac_word	read (unsigned address)
	Reading the content of an address.
virtual unsigned char	read_byte (unsigned address)
	Reading a byte.
virtual ac_Hword	read_half (unsigned address)
	Reading half word.
virtual void	write (unsigned address, ac_word datum)
	Writing into the cache.
virtual void	write_byte (unsigned address, unsigned char datum)
	Class's Constructor.
virtual void	write_half (unsigned address, unsigned short datum)
	Class's Constructor.
	ac_cache (char *n, unsigned bs, unsigned nb, unsigned ss, unsigned st, unsigned char wp=0x11)
	Class's Constructor.
	~ac_cache ()
	Class's Destructor.
void	bindTo (ac_cache &lower)
void	set_codeSize (unsigned s)
	Method to initialize Data array dynamically.
unsigned	get_chosen (unsigned s)
void	update (unsigned s, unsigned e)
	Method that implements the policies of replacement, based on the last access.
unsigned	get_codeSize ()
void	stall ()
void	ready ()
void	request_block (ac_cache_if *client, unsigned address, unsigned size_bytes)
void	request_write_byte (ac_cache_if *client, unsigned address, unsigned char datum)
void	request_write_half (ac_cache_if *client, unsigned address, unsigned short datum)
void	request_write (ac_cache_if *client, unsigned address, ac_word datum)
void	request_write_block (ac_cache_if client, unsigned address, char datum, unsigned size_bytes)
void	response_block (char *block)
void	response_write_byte ()
void	response_write_half ()
void	response_write ()
void	response_write_block ()
void	bindToNext (ac_cache_if &next)
void	bindToPrevious (ac_cache_if &previous)
void	process_request ()

Detailed Description

ArchC class for cache devices This class contains cache parameters for behavioral simulation. The user must define three parameters: using macros for BLOCK_SIZE, NUM_BLOCKS and POLICIES

Definition at line 78 of file ac_cache.H.

Constructor & Destructor Documentation

ac_cache::ac_cache ( char * n,

unsigned bs,

unsigned nb,

unsigned ss,

unsigned st,

unsigned char wp = 0x11

)

Class's Constructor.
The needed arguments are 'n', 'bs', 'nb', 'ss' and 'st': 'n' is the object's name, for instance: "IC2" (Instruction Cache Level 2). 'bs' is the Block Size described by the number of words at each cache line. 'nb' is the Number of Blocks (or lines) of the cache. 'ss' is the Set Size (associativity) in number of grouped blocks at each set. 'st' is the Strategy used for replacement (LRU or RANDOM) 'wp' is the write policiy
Definition at line 582 of file ac_cache.cpp.

Member Function Documentation

unsigned ac_cache::get_chosen ( unsigned s )

Least-recently used (LRU)
Spreads allocation uniformly
Returns the value in the chosen list at the suitable set
Definition at line 659 of file ac_cache.cpp.

ac_word ac_cache::read ( unsigned address ) [virtual]

Reading the content of an address.
Takes as argument the 32-bit address. Searches inside the cache cobject the address asked. The operation can result in a Hit, when the addressed tag is present and the valid bit is ok, returning the resquested data else it can gets a Miss, asking the next hierarchical level for the data, through the "next_level" pointer.
Reimplemented from ac_storage.
Definition at line 296 of file ac_cache.cpp.
References ac_storage::name, ac_storage::read(), and update().