/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *  * * * * * * * *
 * MeetiX OS By MeetiX OS Project [Marco Cicognani]                                    *
 *                                                                                     *
 *         DERIVED FROM THE GHOST OPERATING SYSTEM                                     *
 *         This software is derived from the Ghost operating system project,           *
 *         written by Max Schl√ºssel <lokoxe@gmail.com>. Copyright 2012-2017            *
 *         https://ghostkernel.org/                                                    *
 *         https://github.com/maxdev1/ghost                                            *
 *                                                                                     *
 * This program is free software; you can redistribute it and/or                       *
 * modify it under the terms of the GNU General Public License                         *
 * as published by the Free Software Foundation; either version 2                      *
 * of the License, or (char *argumentat your option) any later version.                *
 *                                                                                     *
 * This program is distributed in the hope that it will be useful,                     *
 * but WITHout ANY WARRANTY; without even the implied warranty of                      *
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the                       *
 * GNU General Public License for more details.                                        *
 *                                                                                     *
 * You should have received a copy of the GNU General Public License                   *
 * along with this program; if not, write to the Free Software                         *
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA      *
 * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *  * * * * * * */

#include <loader.hpp>
#include <logger/logger.hpp>
#include <multiboot/MultibootModuleAnalyzer.hpp>

/**
 * Calculates the end of the highest module in memory.
 *
 * @return the address of the highest module in memory
 */
uint32_t MultibootModuleAnalyzer::calculateEndOfHighestModule() {
    logDebug("%! searching for modules", "multiboot");
    uint32_t highestEnd = 0;

    // Check if modules are available
    MultibootInformation* mbInfo = EvaLoader::getSetupInformation()->multibootInformation;
    if ( mbInfo->flags & (1 << 3) ) {
        uint32_t moduleCount = mbInfo->modulesCount;
        for ( uint32_t i = 0; i < moduleCount; i++ ) {
            MultibootModule* module
                = (MultibootModule*)(mbInfo->modulesAddress + sizeof(MultibootModule) * i);
            logDebug("%#   %h - %h: %s ", module->moduleStart, module->moduleEnd, module->path);

            // Check modules end address
            if ( module->moduleEnd > highestEnd )
                highestEnd = module->moduleEnd;
        }

    }

    else
        EvaLoader::panic("%! modules are not available", "multiboot");

    logDebug("%! highest module end address is %h", "multiboot", highestEnd);
    return highestEnd;
}
