1 <!-- HTML header for doxygen 1.9.6-->
2 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "https://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
3 <html xmlns="http://www.w3.org/1999/xhtml" lang="en-US">
5 <meta http-equiv="Content-Type" content="text/xhtml;charset=UTF-8"/>
6 <meta http-equiv="X-UA-Compatible" content="IE=11"/>
7 <meta name="viewport" content="width=device-width, initial-scale=1"/>
8 <title>CMSIS-Core (Cortex-A): Startup File startup_<Device>.c</title>
9 <link href="doxygen.css" rel="stylesheet" type="text/css" />
10 <script type="text/javascript" src="jquery.js"></script>
11 <script type="text/javascript" src="dynsections.js"></script>
12 <script type="text/javascript" src="tabs.js"></script>
13 <script type="text/javascript" src="footer.js"></script>
14 <script type="text/javascript" src="navtree.js"></script>
15 <link href="navtree.css" rel="stylesheet" type="text/css"/>
16 <script type="text/javascript" src="resize.js"></script>
17 <script type="text/javascript" src="navtreedata.js"></script>
18 <script type="text/javascript" src="navtree.js"></script>
19 <link href="search/search.css" rel="stylesheet" type="text/css"/>
20 <script type="text/javascript" src="search/searchdata.js"></script>
21 <script type="text/javascript" src="search/search.js"></script>
22 <script type="text/javascript">
23 /* @license magnet:?xt=urn:btih:d3d9a9a6595521f9666a5e94cc830dab83b65699&dn=expat.txt MIT */
24 $(document).ready(function() { init_search(); });
27 <script type="text/javascript" src="darkmode_toggle.js"></script>
28 <link href="extra_stylesheet.css" rel="stylesheet" type="text/css"/>
29 <link href="extra_navtree.css" rel="stylesheet" type="text/css"/>
30 <link href="extra_search.css" rel="stylesheet" type="text/css"/>
31 <link href="extra_tabs.css" rel="stylesheet" type="text/css"/>
32 <link href="version.css" rel="stylesheet" type="text/css"/>
33 <script type="text/javascript" src="../../version.js"></script>
36 <div id="top"><!-- do not remove this div, it is closed by doxygen! -->
38 <table cellspacing="0" cellpadding="0">
40 <tr style="height: 55px;">
41 <td id="projectlogo" style="padding: 1.5em;"><img alt="Logo" src="cmsis_logo_white_small.png"/></td>
42 <td style="padding-left: 1em; padding-bottom: 1em;padding-top: 1em;">
43 <div id="projectname">CMSIS-Core (Cortex-A)
44  <span id="projectnumber"><script type="text/javascript">
46 writeHeader.call(this);
47 writeVersionDropdown.call(this, "CMSIS-Core (Cortex-A)");
52 <div id="projectbrief">CMSIS-Core support for Cortex-A processor-based devices</div>
54 <td> <div id="MSearchBox" class="MSearchBoxInactive">
56 <span id="MSearchSelect" onmouseover="return searchBox.OnSearchSelectShow()" onmouseout="return searchBox.OnSearchSelectHide()"> </span>
57 <input type="text" id="MSearchField" value="" placeholder="Search" accesskey="S"
58 onfocus="searchBox.OnSearchFieldFocus(true)"
59 onblur="searchBox.OnSearchFieldFocus(false)"
60 onkeyup="searchBox.OnSearchFieldChange(event)"/>
61 </span><span class="right">
62 <a id="MSearchClose" href="javascript:searchBox.CloseResultsWindow()"><img id="MSearchCloseImg" border="0" src="search/close.svg" alt=""/></a>
66 <!--END !PROJECT_NAME-->
71 <!-- end header part -->
72 <div id="CMSISnav" class="tabs1">
74 <script type="text/javascript">
75 writeComponentTabs.call(this);
79 <script type="text/javascript">
80 writeSubComponentTabs.call(this);
82 <!-- Generated by Doxygen 1.9.6 -->
83 <script type="text/javascript">
84 /* @license magnet:?xt=urn:btih:d3d9a9a6595521f9666a5e94cc830dab83b65699&dn=expat.txt MIT */
85 var searchBox = new SearchBox("searchBox", "search/",'.html');
89 <div id="side-nav" class="ui-resizable side-nav-resizable">
91 <div id="nav-tree-contents">
92 <div id="nav-sync" class="sync"></div>
95 <div id="splitbar" style="-moz-user-select:none;"
96 class="ui-resizable-handle">
99 <script type="text/javascript">
100 /* @license magnet:?xt=urn:btih:d3d9a9a6595521f9666a5e94cc830dab83b65699&dn=expat.txt MIT */
101 $(document).ready(function(){initNavTree('startup_c_pg.html',''); initResizable(); });
104 <div id="doc-content">
105 <!-- window showing the filter options -->
106 <div id="MSearchSelectWindow"
107 onmouseover="return searchBox.OnSearchSelectShow()"
108 onmouseout="return searchBox.OnSearchSelectHide()"
109 onkeydown="return searchBox.OnSearchSelectKey(event)">
112 <!-- iframe showing the search results (closed by default) -->
113 <div id="MSearchResultsWindow">
114 <div id="MSearchResults">
117 <div id="SRResults"></div>
118 <div class="SRStatus" id="Loading">Loading...</div>
119 <div class="SRStatus" id="Searching">Searching...</div>
120 <div class="SRStatus" id="NoMatches">No Matches</div>
126 <div><div class="header">
127 <div class="headertitle"><div class="title">Startup File startup_<Device>.c </div></div>
129 <div class="contents">
130 <div class="textblock"><p>The <a class="el" href="startup_c_pg.html">Startup File startup_<Device>.c</a> contains:</p><ul>
131 <li>Exception vectors of the Cortex-A Processor with weak functions that implement default routines.</li>
132 <li>The reset handler which is executed after CPU reset and typically calls the <a class="el" href="group__system__init__gr.html#ga93f514700ccf00d08dbdcff7f1224eb2">SystemInit</a> function.</li>
133 <li>The setup values for the various stack pointers, i.e. per exceptional mode and main stack.</li>
135 <p>The file exists for each supported toolchain and is the only tool-chain specific CMSIS file.</p>
136 <h1><a class="anchor" id="startup_c_sec"></a>
137 startup_Device.c Template File</h1>
138 <p>An Arm Compiler specific startup file for an Armv7-A processor like Cortex-A9 is shown below. The files for other compiler vendors differ slightly in the syntax, but not in the overall structure.</p>
139 <pre class="fragment">/******************************************************************************
140 * @file startup_<Device>.c
141 * @brief CMSIS Cortex-A Device Startup
143 * @date 10. January 2018
144 ******************************************************************************/
146 * Copyright (c) 2009-2018 Arm Limited. All rights reserved.
148 * SPDX-License-Identifier: Apache-2.0
150 * Licensed under the Apache License, Version 2.0 (the License); you may
151 * not use this file except in compliance with the License.
152 * You may obtain a copy of the License at
154 * www.apache.org/licenses/LICENSE-2.0
156 * Unless required by applicable law or agreed to in writing, software
157 * distributed under the License is distributed on an AS IS BASIS, WITHOUT
158 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
159 * See the License for the specific language governing permissions and
160 * limitations under the License.
163 #include "<Device>.h" /* ToDo: replace '<Device>' with your device name */
165 /*----------------------------------------------------------------------------
167 *----------------------------------------------------------------------------*/
168 #define USR_MODE 0x10 // User mode
169 #define FIQ_MODE 0x11 // Fast Interrupt Request mode
170 #define IRQ_MODE 0x12 // Interrupt Request mode
171 #define SVC_MODE 0x13 // Supervisor mode
172 #define ABT_MODE 0x17 // Abort mode
173 #define UND_MODE 0x1B // Undefined Instruction mode
174 #define SYS_MODE 0x1F // System mode
176 /*----------------------------------------------------------------------------
178 *----------------------------------------------------------------------------*/
179 void Vectors (void) __attribute__ ((section("RESET")));
180 void Reset_Handler (void);
182 /*----------------------------------------------------------------------------
183 Exception / Interrupt Handler
184 *----------------------------------------------------------------------------*/
185 void Undef_Handler (void) __attribute__ ((weak, alias("Default_Handler")));
186 void SVC_Handler (void) __attribute__ ((weak, alias("Default_Handler")));
187 void PAbt_Handler (void) __attribute__ ((weak, alias("Default_Handler")));
188 void DAbt_Handler (void) __attribute__ ((weak, alias("Default_Handler")));
189 void IRQ_Handler (void) __attribute__ ((weak, alias("Default_Handler")));
190 void FIQ_Handler (void) __attribute__ ((weak, alias("Default_Handler")));
192 /*----------------------------------------------------------------------------
193 Exception / Interrupt Vector Table
194 *----------------------------------------------------------------------------*/
195 __ASM void Vectors(void) {
202 LDR PC, =Reset_Handler
203 LDR PC, =Undef_Handler
205 LDR PC, =PAbt_Handler
206 LDR PC, =DAbt_Handler
212 /*----------------------------------------------------------------------------
213 Reset Handler called on controller reset
214 *----------------------------------------------------------------------------*/
215 __ASM void Reset_Handler(void) {
220 // Put any cores other than 0 to sleep
221 MRC p15, 0, R0, c0, c0, 5 // Read MPIDR
227 // Reset SCTLR Settings
228 MRC p15, 0, R0, c1, c0, 0 // Read CP15 System Control register
229 BIC R0, R0, #(0x1 << 12) // Clear I bit 12 to disable I Cache
230 BIC R0, R0, #(0x1 << 2) // Clear C bit 2 to disable D Cache
231 BIC R0, R0, #0x1 // Clear M bit 0 to disable MMU
232 BIC R0, R0, #(0x1 << 11) // Clear Z bit 11 to disable branch prediction
233 BIC R0, R0, #(0x1 << 13) // Clear V bit 13 to disable hivecs
234 MCR p15, 0, R0, c1, c0, 0 // Write value back to CP15 System Control register
238 MRC p15, 0, r0, c1, c0, 1 // Read CP15 Auxiliary Control Register
239 ORR r0, r0, #(1 << 1) // Enable L2 prefetch hint (UNK/WI since r4p1)
240 MCR p15, 0, r0, c1, c0, 1 // Write CP15 Auxiliary Control Register
242 // Set Vector Base Address Register (VBAR) to point to this application's vector table
244 MCR p15, 0, R0, c12, c0, 0
246 // Setup Stack for each exceptional mode
247 IMPORT |Image$$FIQ_STACK$$ZI$$Limit|
248 IMPORT |Image$$IRQ_STACK$$ZI$$Limit|
249 IMPORT |Image$$SVC_STACK$$ZI$$Limit|
250 IMPORT |Image$$ABT_STACK$$ZI$$Limit|
251 IMPORT |Image$$UND_STACK$$ZI$$Limit|
252 IMPORT |Image$$ARM_LIB_STACK$$ZI$$Limit|
254 LDR SP, =|Image$$FIQ_STACK$$ZI$$Limit|
256 LDR SP, =|Image$$IRQ_STACK$$ZI$$Limit|
258 LDR SP, =|Image$$SVC_STACK$$ZI$$Limit|
260 LDR SP, =|Image$$ABT_STACK$$ZI$$Limit|
262 LDR SP, =|Image$$UND_STACK$$ZI$$Limit|
264 LDR SP, =|Image$$ARM_LIB_STACK$$ZI$$Limit|
278 /*----------------------------------------------------------------------------
279 Default Handler for Exceptions / Interrupts
280 *----------------------------------------------------------------------------*/
281 void Default_Handler(void) {
284 </pre> </div></div><!-- contents -->
285 </div><!-- PageDoc -->
286 </div><!-- doc-content -->
287 <!-- start footer part -->
288 <div id="nav-path" class="navpath"><!-- id is needed for treeview function! -->
291 <script type="text/javascript">
293 writeFooter.call(this);