initialiseMultitasking.cc

/*
 * Copyright (c) 2008-2014, Pedigree Developers
 *
 * Please see the CONTRIB file in the root of the source tree for a full
 * list of contributors.
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

#if defined(THREADS)

#include "pedigree/kernel/process/initialiseMultitasking.h"
#include "pedigree/kernel/process/PerProcessorScheduler.h"
#include "pedigree/kernel/process/Process.h"
#include "pedigree/kernel/process/Scheduler.h"
#include "pedigree/kernel/process/Thread.h"
#include "pedigree/kernel/processor/Processor.h"
#include "pedigree/kernel/processor/ProcessorInformation.h"
#include "pedigree/kernel/utilities/StaticString.h"
#include "pedigree/kernel/utilities/new"

void initialiseMultitasking()
{
    // Create the kernel idle process.
    Process *pProcess = new Process();
    pProcess->resetCounts();
    pProcess->description() += "Kernel Process";

#ifdef MULTIPROCESSOR
    pProcess->description() += " - Processor #";
    pProcess->description() += Processor::id();
#endif

    // Create the main kernel thread.
    Thread *pThread = new Thread(pProcess);
    pThread->detach();

    // Initialise the scheduler.
    Scheduler::instance().initialise(pProcess);

    // Initialise the per-process scheduler.
    Processor::information().getScheduler().initialise(pThread);
}

void shutdownMultitasking()
{
}

#ifdef MULTIPROCESSOR
void initialiseMultitaskingPerProcessor()
{
    // Create the kernel idle process.
    Process *pProcess = new Process();
    pProcess->description() += "Kernel Process";

    pProcess->description() += " - Processor #";
    pProcess->description() += Processor::id();

    // Create the kernel idle thread.
    Thread *pThread = new Thread(pProcess);
    pThread->detach();
    Processor::information().getScheduler().initialise(pThread);
}
#endif

#endif