WebSVN – HelenOS-doc – Diff – /design/trunk/src/ch_intro.xml


<?xml version="1.0" encoding="UTF-8"?>
<chapter id="intro">
  <?dbhtml filename="intro.html" ?>
 
  <title>Introduction</title>
 
  <para>HelenOS is a portable operating system with support for a variety of
  modern processor architectures<footnote>
      <para>amd64, arm32, ia32, ia64, mips32, ppc32 and sparc64. ia32xen and
      ppc64 are currently broken.</para>
    </footnote>.</para>
 
  <para>This book describes the design and principles of the HelenOS operating
  system from the perspective of its microkernel as well as from the
  perspective of its userspace drivers and server tasks. Its primary goal is
  to present ideas behind each subsystem and highlight things that are
  specific to HelenOS. Although this text contains references to source code
  (e.g. function names), these are provided only to improve reader's
  orientation when reading the code. This book does not attempt to be a
  substitute for a reference manual and the reader is strongly encouraged to
  look for interface details there.</para>
 
  <section>
    <title>How to Read This Book</title>
 
    <para><xref linkend="architecture" /> contains overview of the overall
    HelenOS architecture.</para>
 
    <para><xref linkend="ds" /> describes essential data structures used both
    in the kernel and in the userspace.</para>
 
    <para><xref linkend="time" /> focuses on time management in the kernel and
    scheds some light on the userspace source of time.</para>
 
    <para><xref linkend="scheduling" /> is dedicated to threads and the
    scheduling subsystem.</para>
 
    <para><xref linkend="mm" /> describes memory management of physical and
    virtual memory.</para>
 
    <para><xref linkend="ipc" /> deals with the IPC subsystem.</para>
 
    <para><xref linkend="hardware" /> describes facilities that a userspace
    task can use in order to become a device driver.</para>
 
    <para><xref linkend="archspecs" /> presents some architecture specific
    issues.</para>
  </section>
</chapter>

Subversion Repositories HelenOS-doc

(root)/design/trunk/src/ch_intro.xml – Rev 151 → 171

Rev 151		Rev 171
1	<?xml version="1.0" encoding="UTF-8"?>	1	<?xml version="1.0" encoding="UTF-8"?>
2	<chapter id="intro">	2	<chapter id="intro">
3	<?dbhtml filename="intro.html" ?>	3	<?dbhtml filename="intro.html" ?>
4		4
5	<title>Introduction</title>	5	<title>Introduction</title>
6		6
7	<para>HelenOS is a portable operating system with support for a variety of modern	7	<para>HelenOS is a portable operating system with support for a variety of
8	processor architectures<footnote>	8	modern processor architectures<footnote>
9	<para>amd64, ia32, ia64, mips32 and ppc32.</para>	9	<para>amd64, arm32, ia32, ia64, mips32, ppc32 and sparc64. ia32xen and
-		10	ppc64 are currently broken.</para>
10	</footnote>.</para>	11	</footnote>.</para>
11		12
12	<para>This book describes the design and principles of the HelenOS operating	13	<para>This book describes the design and principles of the HelenOS operating
13	system from the perspective of its microkernel as well as from the	14	system from the perspective of its microkernel as well as from the
14	perspective of its userspace drivers and server tasks. Its primary goal is	15	perspective of its userspace drivers and server tasks. Its primary goal is
15	to present ideas behind each subsystem and highlight things that are	16	to present ideas behind each subsystem and highlight things that are
16	specific to HelenOS. Although this text contains references to source code	17	specific to HelenOS. Although this text contains references to source code
17	(e.g. function names), these are provided only to improve reader's	18	(e.g. function names), these are provided only to improve reader's
18	orientation when reading the code. This book does not attempt to be a	19	orientation when reading the code. This book does not attempt to be a
19	substitute for a reference manual and the reader is strongly encouraged to	20	substitute for a reference manual and the reader is strongly encouraged to
20	look for interface details there.</para>	21	look for interface details there.</para>
21		22
22	<section>	23	<section>
23	<title>How to Read This Book</title>	24	<title>How to Read This Book</title>
24		25
25	<para><xref linkend="architecture" /> contains overview of the overall	26	<para><xref linkend="architecture" /> contains overview of the overall
26	HelenOS architecture.</para>	27	HelenOS architecture.</para>
27		28
28	<para><xref linkend="ds" /> describes essential data structures used both	29	<para><xref linkend="ds" /> describes essential data structures used both
29	in the kernel and in the userspace.</para>	30	in the kernel and in the userspace.</para>
30		31
31	<para><xref linkend="time" /> focuses on time management in the kernel and	32	<para><xref linkend="time" /> focuses on time management in the kernel and
32	scheds some light on the userspace source of time.</para>	33	scheds some light on the userspace source of time.</para>
33		34
34	<para><xref linkend="scheduling" /> is dedicated to threads and the	35	<para><xref linkend="scheduling" /> is dedicated to threads and the
35	scheduling subsystem.</para>	36	scheduling subsystem.</para>
36		37
37	<para><xref linkend="mm" /> describes memory management of physical and	38	<para><xref linkend="mm" /> describes memory management of physical and
38	virtual memory.</para>	39	virtual memory.</para>
39		40
40	<para><xref linkend="ipc" /> deals with the IPC subsystem.</para>	41	<para><xref linkend="ipc" /> deals with the IPC subsystem.</para>
41		42
42	<para><xref linkend="hardware" /> describes facilities that a userspace	43	<para><xref linkend="hardware" /> describes facilities that a userspace
43	task can use in order to become a device driver.</para>	44	task can use in order to become a device driver.</para>
44		45
45	<para><xref linkend="archspecs" /> presents some architecture specific	46	<para><xref linkend="archspecs" /> presents some architecture specific
46	issues.</para>	47	issues.</para>
47	</section>	48	</section>
48	</chapter>	49	</chapter>