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#include "dram.h"
#include "definitions.h"
#include "response.h"
#include <algorithm>
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->wait_time = this->delay;
this->lower = nullptr;
this->requester = IDLE;
}
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;
}
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