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  46    <div id="projectname">CMSIS-Core (Cortex-A)
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  55    <div id="projectbrief">CMSIS-Core support for Cortex-A processor-based devices</div>
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 130   <div class="headertitle"><div class="title">Overview </div></div>
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 133 <div class="textblock"><p><a class="anchor" id="mainpage"></a> CMSIS-Core (Cortex-A) implements the basic run-time system for a Cortex-A device and gives the user access to the processor core and the device peripherals. In detail it defines:</p><ul>
 134 <li><b>Hardware Abstraction Layer (HAL)</b> for Cortex-A processor registers with standardized definitions for the GIC, FPU, MMU, Cache, and core access functions.</li>
 135 <li><b>System exception names</b> to interface to system exceptions without having compatibility issues.</li>
 136 <li><b>Methods to organize header files</b> that makes it easy to learn new Cortex-A microcontroller products and improve software portability. This includes naming conventions for device-specific interrupts.</li>
 137 <li><b>Methods for system initialization</b> to be used by each MCU vendor. For example, the standardized <a class="el" href="group__system__init__gr.html#ga93f514700ccf00d08dbdcff7f1224eb2" title="Function to Initialize the system.">SystemInit()</a> function is essential for configuring the clock system of the device.</li>
 138 <li><b>Intrinsic functions</b> used to generate CPU instructions that are not supported by standard C functions.</li>
 139 <li>A variable to determine the <b>system clock frequency</b> which simplifies the setup of the system timers.</li>
 140 </ul>
 141 <p>The following sections provide details about the CMSIS-Core (Cortex-A):</p><ul>
 142 <li><a class="el" href="using_pg.html">Using CMSIS in Embedded Applications</a> describes the project setup and shows a simple program example.</li>
 143 <li><a class="el" href="templates_pg.html">CMSIS-Core Device Templates</a> describes the files of the CMSIS-Core (Cortex-A) in detail and explains how to adapt template files provided by Arm to silicon vendor devices.</li>
 144 <li><a class="el" href="coreMISRA_Exceptions_pg.html">MISRA-C Deviations</a> describes the violations to the MISRA standard.</li>
 145 <li><a href="modules.html">API Reference</a> describes the features and functions of the <a class="el" href="device_h_pg.html">Device Header File &lt;Device.h&gt;</a> in detail.</li>
 146 <li><a href="annotated.html">Data Structures</a> describe the data structures of the <a class="el" href="device_h_pg.html">Device Header File &lt;Device.h&gt;</a> in detail.</li>
 147 </ul>
 148 <h1><a class="anchor" id="autotoc_md0"></a>
 149 Access to CMSIS-Core (Cortex-A)</h1>
 150 <p>CMSIS-Core is actively maintained in <a href="https://github.com/ARM-software/CMSIS_6">CMSIS 6 GitHub repository</a> and released as part of the <a href="../../General/html/cmsis_pack.html">CMSIS Software Pack</a>.</p>
 151 <p>The following directories and files relevant to CMSIS-Core (Cortex-A) are present in the <b>ARM::CMSIS</b> Pack:</p>
 152 <table class="markdownTable">
 153 <tr class="markdownTableHead">
 154 <th class="markdownTableHeadLeft">Directory   </th><th class="markdownTableHeadLeft">Content    </th></tr>
 155 <tr class="markdownTableRowOdd">
 156 <td class="markdownTableBodyLeft">📂 CMSIS   </td><td class="markdownTableBodyLeft">CMSIS Base software components folder    </td></tr>
 157 <tr class="markdownTableRowEven">
 158 <td class="markdownTableBodyLeft">┣ 📂 Documentation/Core_A   </td><td class="markdownTableBodyLeft">A local copy of this CMSIS-Core (A) documentation    </td></tr>
 159 <tr class="markdownTableRowOdd">
 160 <td class="markdownTableBodyLeft">┗ 📂 Core   </td><td class="markdownTableBodyLeft">CMSIS-Core files    </td></tr>
 161 <tr class="markdownTableRowEven">
 162 <td class="markdownTableBodyLeft">&emsp;&#160; ┣ 📂 Include   </td><td class="markdownTableBodyLeft"><a class="el" href="templates_pg.html#CMSIS_Processor_files">CMSIS-Core Processor Files</a>.    </td></tr>
 163 <tr class="markdownTableRowOdd">
 164 <td class="markdownTableBodyLeft">&emsp;&emsp;&#160; ┗ 📂 a-profile   </td><td class="markdownTableBodyLeft">Header files specific for Arm A-Profile.    </td></tr>
 165 <tr class="markdownTableRowEven">
 166 <td class="markdownTableBodyLeft">&emsp;&#160; ┗ 📂 Template   </td><td class="markdownTableBodyLeft"><a class="el" href="templates_pg.html#template_files_sec">Template Files</a>   </td></tr>
 167 </table>
 168 <h1><a class="anchor" id="ref_v7A"></a>
 169 Processor Support</h1>
 170 <p>CMSIS supports a selected subset of <a href="https://www.arm.com/products/silicon-ip-cpu?families=cortex-m&amp;showall=true">Cortex-A processors</a>.</p>
 171 <p><a class="anchor" id="ref_man_ca_sec"></a><b>Cortex-A Technical Reference Manuals</b></p>
 172 <p>The following Technical Reference Manuals describe the various Arm Cortex-A processors:</p><ul>
 173 <li><a href="https://developer.arm.com/documentation/ddi0433">Cortex-A5</a> (Armv7-A architecture)</li>
 174 <li><a href="https://developer.arm.com/documentation/ddi0464">Cortex-A7</a> (Armv7-A architecture)</li>
 175 <li><a href="https://developer.arm.com/documentation/100511">Cortex-A9</a> (Armv7-A architecture)</li>
 176 </ul>
 177 <h1><a class="anchor" id="tested_tools_sec"></a>
 178 Tested and Verified Toolchains</h1>
 179 <p>The <a class="el" href="templates_pg.html">CMSIS-Core Device Templates</a> supplied by Arm have been tested and verified with the following toolchains:</p><ul>
 180 <li>Arm: Arm Compiler 5.06 update 7</li>
 181 <li>Arm: Arm Compiler 6.16</li>
 182 <li>Arm: Arm Compiler 6.6.4</li>
 183 <li>GNU: GNU Arm Embedded Toolchain 10-2020-q4-major (10.2.1 20201103)</li>
 184 <li>IAR: IAR ANSI C/C++ Compiler for Arm 8.20.1.14183 </li>
 185 </ul>
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