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89 lines
3.5 KiB
XML
89 lines
3.5 KiB
XML
<?xml version="1.0" encoding="UTF-8"?>
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<!--
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Copyright (c) 2016, 2020 OpenPOWER Foundation
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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-->
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<section xmlns="http://docbook.org/ns/docbook"
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xmlns:xi="http://www.w3.org/2001/XInclude"
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xmlns:xlink="http://www.w3.org/1999/xlink"
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version="5.0" xml:id="section_PAPR_goals">
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<?dbhtml stop-chunking?>
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<title> Goals of This Specification</title>
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<para>The specific goals of this specification are as follows:</para>
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<itemizedlist>
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<listitem>
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<para>To create a stable platform architecture to be used by platforms based on processors
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defined by <xref linkend="dbdoclet.50569387_99718"/>. <emphasis>Processor</emphasis>
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implementations based on this
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architecture include IBM POWER8™ processors and their successors. </para>
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</listitem>
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<listitem>
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<para>To create an architecture which will allow platforms to operate with previous versions
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of the OS (“n-1” capability). </para>
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</listitem>
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<listitem>
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<para>To leverage existing and future industry-standard buses and interfaces.</para>
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</listitem>
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<listitem>
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<para>To provide a flexible address map. Another key attribute of this specification
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is the relocatability of devices and subsystems within the Processor Architecture (PA)
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address space. Subsystem address information, which defines where I/O Adapters (IOAs)
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reside, is detected by the OF and passed to the OS in the device tree. This architecture
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accommodates the use of multiple identical buses and IOAs in the same platform without
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address conflicts.</para>
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</listitem>
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<listitem>
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<para>To build upon the OF boot environment defined in
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<xref linkend="dbdoclet.50569387_45524"/>.</para>
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</listitem>
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<listitem>
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<para>To provide an architecture which can evolve as technology changes. </para>
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</listitem>
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<listitem>
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<para>To minimize the support cost for multiple OS versions through the definition of common
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platform abstraction techniques. Common and compatible approaches to the abstraction of
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hardware will reduce the burden on hardware developers who produce differentiated machines.</para>
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</listitem>
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<listitem>
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<para>To architect a mechanism for error handling, error reporting, and fault isolation. This
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architecture provides for the implementation of more robust systems, if desired by the system
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developers.</para>
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</listitem>
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<listitem>
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<para>To architect a mechanism for Dynamic Reconfiguration of the hardware.</para>
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</listitem>
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<listitem>
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<para>To provide an architecture which allows for the logical partitioning of system resources,
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in order to execute multiple concurrent OS instances.</para>
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</listitem>
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</itemizedlist>
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</section>
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