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<book>

  <title>HelenOS Design Documentation</title>

  <chapter>

  <title>Introduction</title>

      <graphic align="center" fileref="images/helenos.gif" />

      <para>The HelenOS project is an effort to develop an easily portable,

      light but durable operating system. HelenOS supports SMP, multitasking

      and multithreading on both 32-bit and 64-bit, little-endian and

      big-endian, processor architectures, among wich are AMD64/EM64T

      (x86-64), IA-32, IA-64 (Itanium), 32-bit MIPS, 32-bit PowerPC and SPARC

      V9.</para>

      <para>This manual should help you understanding design concepts of

      different part of the operating system.</para>

      <para>In case you are interested in our project or have any questions

      about it, feel free to subscribe to our <ulink

      url="http://www.helenos.eu/?reason=list">mailing list</ulink>. We are

      looking for people to join our team or to merely try out our system and

      become our beta testers.</para>

  </chapter>

  <chapter>

    <title>Architecture overview</title>

    <para>Couple of words about microkernel concept etc </para>

  </chapter>

  <chapter>

    <title>Scheduling</title>

    <section>

        <title>Basic terms</title>

        <para>Explain Task, Thread etc</para>

    </section>

    <section>

      <title>Context switching</title>

      <para>Something about context. Probably arch specific context notes.</para>

    </section>

    <section>

        <title>Kernel clock</title>

        <para>timer interrupt handling, slices, timeouts, delays</para>

    </section>

    <section>

        <title>Scheduler</title>

        <para>How scheduler designed and how it works.</para>

    </section>

  </chapter>

  <chapter>

    <title>Synchronization</title>

    <section>

      <title>Introduction. Concept.</title>

      <para>Couple of words about global conception of sychronization</para>

    </section>

    <section>

        <title>Active kernel synchronization. Spinlock.</title>

    <para>Spinlocks explanation. Arch specific notes.</para>

    </section>

    <section>

        <title>Passive kernel synchronization</title>

        <section>

          <title>Mutex</title>

          <para>Mutex explanations</para>

        </section>

        <section>

          <title>Semaphore</title>

          <para>Semaphore explanations</para>

        </section>

        <section>

          <title>Read/Write Locks</title>

          <para>RWLocks explanation</para>

        </section>

        <section>

          <title>Wait queues</title>

          <para>Wait queue explanation</para>

        </section>

        <section>

          <title>Conditional variables</title>

          <para>Condvars explanation</para>

        </section>

    </section>

    <section>

      <title>Userspace synchronization. Futex.</title>

      <para>Idea. Futex explanation.</para>

    </section>

  </chapter>

  <chapter>

    <title>Memory management</title>

    <section>

      <title>Virtual memory management</title>

      <para></para>

    </section>

    <section>

      <title>Physical memory management</title>

      <para></para>

    </section>

    <section>

      <title>Kernel allocators</title>

      <section>

        <title>Buddy allocator</title>

        <para>Physical memory allocation is handled by buddy allocator.</para>

      </section>

      <section>

        <title>Slab allocator</title>

        <para></para>

      </section>

    </section>

    <section>

      <title>Memory sharing</title>

      <para></para>

    </section>

  </chapter>

  <chapter>

    <title>Hardware handling. Device drivers.</title>

    <para></para>

  </chapter>

  <chapter>

    <title>IPC</title>

    <para></para>

  </chapter>

  <chapter>

    <title>User-space</title>

    <para></para>

  </chapter>

</book>