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<!-- Copyright (C) 2003 Red Hat, Inc.                                -->
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<!-- and conditions set forth in the Open Publication License, v1.0  -->
<!-- or later (the latest version is presently available at          -->
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<HTML
><HEAD
><TITLE
>Introduction</TITLE
><meta name="MSSmartTagsPreventParsing" content="TRUE">
<META
NAME="GENERATOR"
CONTENT="Modular DocBook HTML Stylesheet Version 1.76b+
"><LINK
REL="HOME"
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>eCos Reference Manual</TH
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><HR
ALIGN="LEFT"
WIDTH="100%"></DIV
><DIV
CLASS="CHAPTER"
><H1
><A
NAME="HAL-INTRODUCTION">Chapter 6. Introduction</H1
><P
>This is an initial specification of the <SPAN
CLASS="emphasis"
><I
CLASS="EMPHASIS"
>eCos</I
></SPAN
> Hardware Abstraction Layer (HAL). The HAL abstracts
the underlying hardware of a processor architecture and/or the
platform to a level sufficient for the eCos kernel to be ported onto
that platform.</P
><DIV
CLASS="NOTE"
><BLOCKQUOTE
CLASS="NOTE"
><P
><B
>Caveat: </B
>This document is an informal description of the HAL capabilities and
is not intended to be full documentation, although it may be used as a
source for such. It also describes the HAL as it is currently
implemented for the architectures targeted in this release. It most
closely describes the HALs for the MIPS, I386 and PowerPC HALs. Other
architectures are similar but may not be organized precisely as
described here.</P
></BLOCKQUOTE
></DIV
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><TR
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>

Line No.	Rev	Author	Line
1	28	unneback	`<!-- Copyright (C) 2003 Red Hat, Inc. -->`
2			`<!-- This material may be distributed only subject to the terms -->`
3			`<!-- and conditions set forth in the Open Publication License, v1.0 -->`
4			`<!-- or later (the latest version is presently available at -->`
5			`<!-- http://www.opencontent.org/openpub/). -->`
6			`<!-- Distribution of the work or derivative of the work in any -->`
7			`<!-- standard (paper) book form is prohibited unless prior -->`
8			`<!-- permission is obtained from the copyright holder. -->`
9			`<HTML`
10			`><HEAD`
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12			`>Introduction</TITLE`
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15			`NAME="GENERATOR"`
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18			`REL="HOME"`
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20			`HREF="ecos-ref.html"><LINK`
21			`REL="UP"`
22			`TITLE="The eCos Hardware Abstraction Layer (HAL)"`
23			`HREF="the-ecos-hardware-abstraction-layer.html"><LINK`
24			`REL="PREVIOUS"`
25			`TITLE="The eCos Hardware Abstraction Layer (HAL)"`
26			`HREF="the-ecos-hardware-abstraction-layer.html"><LINK`
27			`REL="NEXT"`
28			`TITLE="Architecture, Variant and Platform"`
29			`HREF="hal-architecture-variant-and-platform.html"></HEAD`
30			`><BODY`
31			`CLASS="CHAPTER"`
32			`BGCOLOR="#FFFFFF"`
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44			`CELLSPACING="0"`
45			`><TR`
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47			`COLSPAN="3"`
48			`ALIGN="center"`
49			`>eCos Reference Manual</TH`
50			`></TR`
51			`><TR`
52			`><TD`
53			`WIDTH="10%"`
54			`ALIGN="left"`
55			`VALIGN="bottom"`
56			`><A`
57			`HREF="the-ecos-hardware-abstraction-layer.html"`
58			`ACCESSKEY="P"`
59			`>Prev</A`
60			`></TD`
61			`><TD`
62			`WIDTH="80%"`
63			`ALIGN="center"`
64			`VALIGN="bottom"`
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76			`></TABLE`
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78			`ALIGN="LEFT"`
79			`WIDTH="100%"></DIV`
80			`><DIV`
81			`CLASS="CHAPTER"`
82			`><H1`
83			`><A`
84			`NAME="HAL-INTRODUCTION">Chapter 6. Introduction</H1`
85			`><P`
86			`>This is an initial specification of the <SPAN`
87			`CLASS="emphasis"`
88			`><I`
89			`CLASS="EMPHASIS"`
90			`>eCos</I`
91			`></SPAN`
92			`> Hardware Abstraction Layer (HAL). The HAL abstracts`
93			`the underlying hardware of a processor architecture and/or the`
94			`platform to a level sufficient for the eCos kernel to be ported onto`
95			`that platform.</P`
96			`><DIV`
97			`CLASS="NOTE"`
98			`><BLOCKQUOTE`
99			`CLASS="NOTE"`
100			`><P`
101			`><B`
102			`>Caveat: </B`
103			`>This document is an informal description of the HAL capabilities and`
104			`is not intended to be full documentation, although it may be used as a`
105			`source for such. It also describes the HAL as it is currently`
106			`implemented for the architectures targeted in this release. It most`
107			`closely describes the HALs for the MIPS, I386 and PowerPC HALs. Other`
108			`architectures are similar but may not be organized precisely as`
109			`described here.</P`
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131			`>Prev</A`
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134			`WIDTH="34%"`
135			`ALIGN="center"`
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145			`VALIGN="top"`
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147			`HREF="hal-architecture-variant-and-platform.html"`
148			`ACCESSKEY="N"`
149			`>Next</A`
150			`></TD`
151			`></TR`
152			`><TR`
153			`><TD`
154			`WIDTH="33%"`
155			`ALIGN="left"`
156			`VALIGN="top"`
157			`>The eCos Hardware Abstraction Layer (HAL)</TD`
158			`><TD`
159			`WIDTH="34%"`
160			`ALIGN="center"`
161			`VALIGN="top"`
162			`><A`
163			`HREF="the-ecos-hardware-abstraction-layer.html"`
164			`ACCESSKEY="U"`
165			`>Up</A`
166			`></TD`
167			`><TD`
168			`WIDTH="33%"`
169			`ALIGN="right"`
170			`VALIGN="top"`
171			`>Architecture, Variant and Platform</TD`
172			`></TR`
173			`></TABLE`
174			`></DIV`
175			`></BODY`
176			`></HTML`
177			`>`

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[/] [openrisc/] [trunk/] [rtos/] [ecos-2.0/] [doc/] [html/] [ref/] [hal-introduction.html] - Blame information for rev 174