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#include "dram.h"
#include "definitions.h"
#include "response.h"
#include <bits/stdc++.h>
#include <algorithm>
#include <bitset>
#include <iostream>
#include <iterator>
Dram::Dram(int lines, int delay)
{
this->data = new std::vector<std::array<signed int, LINE_SIZE>>;
this->data->resize(lines);
this->delay = delay;
this->is_waiting = false;
this->lower = nullptr;
this->requester = IDLE;
this->wait_time = this->delay;
}
Dram::~Dram() { delete this->data; }
void Dram::do_write(signed data, int address)
{
int line = address / LINE_SIZE;
int word = address % LINE_SIZE;
this->data->at(line).at(word) = data;
}
Response Dram::write(Accessor accessor, signed int data, int address)
{
Response r = WAIT;
if (accessor == SIDE) {
this->do_write(data, address);
r = OK;
} else {
/* Do this first--then process the first cycle immediately. */
if (this->requester == IDLE)
this->requester = accessor;
if (this->requester == accessor) {
if (this->wait_time == 0) {
this->do_write(data, address);
r = OK;
}
}
}
return r;
}
void Dram::do_read(std::array<signed int, LINE_SIZE> &data_line, int address)
{
int line = address / LINE_SIZE;
data_line = this->data->at(line);
}
Response Dram::read(
Accessor accessor, int address, std::array<signed int, LINE_SIZE> &data)
{
Response r = WAIT;
if (this->requester == IDLE)
this->requester = accessor;
if (this->requester == accessor) {
if (this->wait_time == 0) {
this->do_read(data, address);
r = OK;
}
}
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_SIZE);
cout << data.capacity();
os << " " << std::setfill(' ') << std::setw(MEM_SPEC + 2) << "INDEX"
<< " | " << std::setfill(' ') << std::setw((8 + 3) * 4 - 1) << "DATA" << '\n';
for (int i = 0; i < MEM_SIZE; ++i) {
os << " 0b" << std::setw(MEM_SPEC) << std::bitset<MEM_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 << '\n';
}
std::cout.flags(default_flags);
std::cout.fill(default_fill);
return os;
}
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