1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
|
#ifndef DRAM_H
#define DRAM_H
#include "definitions.h"
#include "storage.h"
#include <functional>
#include <ostream>
class Dram : public Storage
{
public:
/**
* Constructor.
* @param The number of clock cycles each access takes.
* @return A new memory object.
*/
Dram(int delay);
~Dram();
int
write_word(void *, signed int, int) override;
int
write_line(void *, std::array<signed int, LINE_SIZE>, int) override;
int
read_word(void *, int, signed int &) override;
int
read_line(void *, int, std::array<signed int, LINE_SIZE> &) override;
/**
* TODO This will accept a file at a later date.
*/
void
load(std::vector<signed int> program);
private:
/**
* Helper for all access methods.
* Calls `request_handler` when `id` is allowed to complete its
* request cycle.
* @param the source making the request
* @param the address to write to
* @param the function to call when an access should be completed
* @return 1 if the access completed successfully, 0 otherwise
*/
int
process(void *id, int address, std::function<void(int line, int word)> request_handler);
/**
* Returns OK if `id` is allowed to complete its request this cycle.
* Handles wait times, side door, and setting the current id this
* storage is serving.
* @param the source making the request
* @return 1 if the access can be completed this function call, 0 otherwise
*/
int
is_access_cleared(void *id);
/**
* Given `address`, returns the line and word it is in.
* @param an address
* @param the line (row) `address` is in
* @param the word (column) `address` corresponds to
*/
void get_memory_index(int address, int &line, int &word);
};
#endif /* DRAM_H_INCLUDED */
|
