/*
 * RefreshManager.cpp
 *
 *  Created on: Mar 6, 2014
 *      Author: jonny
 */

#include <core/refresh/RefreshManager.h>
#include "core/utils/Utils.h"



namespace controller {

RefreshManager::RefreshManager(const RefreshTiming& refreshTiming,
		IInternalScheduler& internalScheduler) :
		refreshTiming(refreshTiming), internalScheduler(internalScheduler)
{
	setupTransaction(refreshTransaction, Bank(0));
	nextPlannedRefresh = new ScheduledCommand(refreshTransaction, Refresh, SC_ZERO_TIME,
			refreshTiming.tRFC);
	planNextRefresh(*nextPlannedRefresh);
}

RefreshManager::RefreshManager(const RefreshTiming& refreshTiming,
		IInternalScheduler& internalScheduler, Bank bank) :
		refreshTiming(refreshTiming), internalScheduler(internalScheduler)
{
	setupTransaction(refreshTransaction, bank);
	nextPlannedRefresh = new ScheduledCommand(refreshTransaction, Refresh, SC_ZERO_TIME,
			refreshTiming.tRFC);
	planNextRefresh(*nextPlannedRefresh);
}

RefreshManager::~RefreshManager()
{
	delete nextPlannedRefresh;
}

/*
 * Checks for a scheduled CommandSequence, if there is a collision with the current planned,
 * not yet scheduled, refresh command. In case of a collision the manager schedules the refresh
 * (sends it out) and plans the next refresh. Afterwards the CommandSequence is re-scheduled
 * with the new controller state (earliest start time is the end of the just scheduled refresh).
 */
bool RefreshManager::hasCollision(const CommandSchedule& schedule)
{
	if (schedule.getEnd() < nextPlannedRefresh->getStart())
	{
		return false;
	}
	else
	{
		return true;
	}
}

void RefreshManager::scheduleRefresh(sc_time time)
{
	if (time <= nextPlannedRefresh->getStart())
		scheduleRefresh(*nextPlannedRefresh);
}

void RefreshManager::scheduleRefresh(ScheduledCommand& refresh)
{
	internalScheduler.scheduleCommand(refresh);
	planNextRefresh(refresh);
}

void RefreshManager::planNextRefresh(ScheduledCommand& refresh) //TODO nicer to return the reference ?
{
	refresh.delayStart(refreshTiming.tREFI);
	internalScheduler.scheduleTrigger(RefreshTrigger, refresh.getStart());
}

void RefreshManager::setupTransaction(tlm::tlm_generic_payload& transaction, Bank bank)
{
	transaction.set_address(getStartAddress(bank));
	transaction.set_command(tlm::TLM_READ_COMMAND);
	transaction.set_data_length(0);
	transaction.set_response_status(tlm::TLM_OK_RESPONSE);
	transaction.set_dmi_allowed(false);
	transaction.set_byte_enable_length(0);
	transaction.set_streaming_width(0);

	transaction.set_extension(new DramExtension(Thread(0), bank, Row(0), Column(0))); //payload takes ownership
}

} /* namespace controller */