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#include "dram.h"
#include "definitions.h"
#include "response.h"
#include <algorithm>
#include <bits/stdc++.h>
#include <bitset>
#include <iostream>
#include <iterator>
#include <utils.h>
Dram::Dram(int delay)
{
this->data = new std::vector<std::array<signed int, LINE_SIZE>>;
this->data->resize(MEM_LINES);
this->delay = delay;
this->is_waiting = false;
this->lower = nullptr;
this->requester = IDLE;
this->wait_time = this->delay;
}
Dram::~Dram() { delete this->data; }
Response Dram::write_line(
Accessor accessor, std::array<signed int, LINE_SIZE> data_line, int address)
{
return process(accessor, address, [&](int line, int word) {
(void)word;
this->data->at(line) = data_line;
});
}
Response Dram::write_word(Accessor accessor, signed int data, int address)
{
return process(accessor, address, [&](int line, int word) {
this->data->at(line).at(word) = data;
});
}
// TODO requires testing
Response Dram::read_line(
Accessor accessor,
int address,
std::array<signed int, LINE_SIZE> &data_line)
{
return process(accessor, address, [&](int line, int word) {
(void)word;
data_line = this->data->at(line);
});
}
Response Dram::read_word(Accessor accessor, int address, signed int &data)
{
return process(accessor, address, [&](int line, int word) {
data = this->data->at(line).at(word);
});
}
// TODO load a file instead and test this method
void Dram::load(std::vector<signed int> program) {
unsigned long i;
for (i = 0; i < program.size(); ++i) {
int line, word;
get_memory_index(i, line, word);
this->data->at(line).at(word) = program[i];
}
}
Response Dram::process(
Accessor accessor,
int address,
std::function<void(int line, int word)> request_handler)
{
Response r = this->is_access_cleared(accessor);
if (r == OK) {
int line, word;
get_memory_index(address, line, word);
request_handler(line, word);
}
return r;
}
Response Dram::is_access_cleared(Accessor accessor)
{
Response r;
r = WAIT;
/* Do this first--then process the first cycle immediately. */
if (accessor == SIDE)
r = OK;
else {
if (this->requester == IDLE)
this->requester = accessor;
if (this->requester == accessor) {
if (this->wait_time == 0) {
this->requester = IDLE;
this->wait_time = delay;
r = OK;
} else {
--this->wait_time;
}
}
}
return r;
}
std::ostream &operator<<(std::ostream &os, const Dram &d)
{
const auto default_flags = std::cout.flags();
const auto default_fill = std::cout.fill();
std::vector<std::array<signed int, LINE_SIZE>> data = d.view(0, MEM_LINES);
os << " " << std::setfill(' ') << std::setw(MEM_LINE_SPEC + 2 + LINE_SPEC)
<< "ADDRESS"
<< " | " << std::setfill(' ') << std::setw((8 + 3) * 4 - 1) << "DATA"
<< std::endl;
for (int i = 0; i < MEM_LINES; ++i) {
os << " 0b" << std::setw(MEM_LINE_SPEC + LINE_SPEC) << left
<< std::bitset<MEM_LINE_SPEC>(i) << " | ";
for (int j = 0; j < LINE_SIZE; ++j) {
os << "0x" << std::setfill('0') << std::setw(8) << std::hex
<< data.at(i).at(j) << ' ';
}
os << std::endl;
}
std::cout.flags(default_flags);
std::cout.fill(default_fill);
return os;
}
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