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| <div class="title">System Partition Header File partition_<device>.h </div> </div> |
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| <div class="textblock"><p>The <a class="el" href="partition_h_pg.html">System Partition Header File partition_<device>.h</a> contains the initial setup of the TrustZone hardware in an Armv8-M system. The function <a class="el" href="group__sau__trustzone__functions.html#ga6093bc5939ea8924fbcfdffb8f0553f1">TZ_SAU_Setup</a> is call from <a class="el" href="group__system__init__gr.html#ga93f514700ccf00d08dbdcff7f1224eb2">SystemInit</a> and uses the settings in this file to initialize the Secure Attribute Unit (SAU) and define non-secure interrupts (register NVIC_INIT_ITNS). The following initializations are performed:</p> |
| <ul> |
| <li><a class="el" href="partition_h_pg.html#sau_ctrlregister_sec">SAU CTRL register settings</a> provides settings for the SAU CTRL register.</li> |
| <li><a class="el" href="partition_h_pg.html#sau_regions_sect">Configuration of the SAU Address Regions</a> provides configuration of the SAU Address Regions.</li> |
| <li><a class="el" href="partition_h_pg.html#sau_sleepexception_sec">Configuration of Sleep and Exception behaviour</a> provides device-specific deepsleep and exception settings.</li> |
| <li><a class="el" href="partition_h_pg.html#sau_interrupttarget_sec">Configuration of Interrupt Target settings</a> provides device-specific interrupt target settings.</li> |
| </ul> |
| <h1><a class="anchor" id="sau_ctrlregister_sec"></a> |
| SAU CTRL register settings</h1> |
| <table class="cmtable"> |
| <tr> |
| <th>#define </th><th>Value Range </th><th>Default </th><th>Description </th></tr> |
| <tr> |
| <td>SAU_INIT_CTRL </td><td>0 .. 1 </td><td>0 </td><td>Initialize SAU CTRL register or not<ul> |
| <li>0: do not initialize SAU CTRL register</li> |
| <li>1: initialize SAU CTRL register </li> |
| </ul> |
| </td></tr> |
| <tr> |
| <td>SAU_INIT_CTRL_ENABLE </td><td>0 .. 1 </td><td>0 </td><td>enable/disable the SAU<ul> |
| <li>0: disable SAU</li> |
| <li>1: enable SAU </li> |
| </ul> |
| </td></tr> |
| <tr> |
| <td>SAU_INIT_CTRL_ALLNS </td><td>0 .. 1 </td><td>0 </td><td>value for SAU_CTRL register bit ALLNS<ul> |
| <li>0: all Memory is Secure</li> |
| <li>1: all Memory is Non-Secure </li> |
| </ul> |
| </td></tr> |
| </table> |
| <h1><a class="anchor" id="sau_regions_sect"></a> |
| Configuration of the SAU Address Regions</h1> |
| <table class="cmtable"> |
| <tr> |
| <th>#define </th><th>Value Range </th><th>Default </th><th>Description </th></tr> |
| <tr> |
| <td>SAU_REGIONS_MAX </td><td>0 .. tbd </td><td>8 </td><td>maximum number of SAU regions </td></tr> |
| <tr> |
| <td>SAU_INIT_REGION<number> </td><td>0 .. 1 </td><td>0 </td><td>initialize SAU region or not<ul> |
| <li>0: do not initialize SAU region</li> |
| <li>1: initialize SAU region </li> |
| </ul> |
| </td></tr> |
| <tr> |
| <td>SAU_INIT_START<number> </td><td>0x00000000 .. 0xFFFFFFE0<br/> |
| [in steps of 32] </td><td>0x00000000 </td><td>region start address </td></tr> |
| <tr> |
| <td>SAU_INIT_END<number> </td><td>0x00000000 .. 0xFFFFFFE0<br/> |
| [in steps of 32] </td><td>0x00000000 </td><td>region start address </td></tr> |
| <tr> |
| <td>SAU_INIT_NSC<number> </td><td>0 .. 1 </td><td>0 </td><td>SAU region attribute<ul> |
| <li>0: Non-Secure</li> |
| <li>1: Secure, Non-Secure callable </li> |
| </ul> |
| </td></tr> |
| </table> |
| <p>The range of <number> is from 0 .. SAU_REGIONS_MAX. A set of these macros must exist for each <number>.</p> |
| <p>The following example shows a set of SAU region macros.</p> |
| <div class="fragment"><div class="line"><span class="preprocessor">#define SAU_REGIONS_MAX 8 </span><span class="comment">/* Max. number of SAU regions */</span><span class="preprocessor"></span></div> |
| <div class="line"><span class="preprocessor"></span> </div> |
| <div class="line"><span class="preprocessor">#define SAU_INIT_REGION0 1</span></div> |
| <div class="line"><span class="preprocessor"></span><span class="preprocessor">#define SAU_INIT_START0 0x00000000 </span><span class="comment">/* start address of SAU region 0 */</span><span class="preprocessor"></span></div> |
| <div class="line"><span class="preprocessor"></span><span class="preprocessor">#define SAU_INIT_END0 0x001FFFE0 </span><span class="comment">/* end address of SAU region 0 */</span><span class="preprocessor"></span></div> |
| <div class="line"><span class="preprocessor"></span><span class="preprocessor">#define SAU_INIT_NSC0 1</span></div> |
| <div class="line"><span class="preprocessor"></span> </div> |
| <div class="line"><span class="preprocessor">#define SAU_INIT_REGION1 1</span></div> |
| <div class="line"><span class="preprocessor"></span><span class="preprocessor">#define SAU_INIT_START1 0x00200000 </span><span class="comment">/* start address of SAU region 1 */</span><span class="preprocessor"></span></div> |
| <div class="line"><span class="preprocessor"></span><span class="preprocessor">#define SAU_INIT_END1 0x003FFFE0 </span><span class="comment">/* end address of SAU region 1 */</span><span class="preprocessor"></span></div> |
| <div class="line"><span class="preprocessor"></span><span class="preprocessor">#define SAU_INIT_NSC1 0</span></div> |
| <div class="line"><span class="preprocessor"></span> </div> |
| <div class="line"><span class="preprocessor">#define SAU_INIT_REGION2 1</span></div> |
| <div class="line"><span class="preprocessor"></span><span class="preprocessor">#define SAU_INIT_START2 0x20200000 </span><span class="comment">/* start address of SAU region 2 */</span><span class="preprocessor"></span></div> |
| <div class="line"><span class="preprocessor"></span><span class="preprocessor">#define SAU_INIT_END2 0x203FFFE0 </span><span class="comment">/* end address of SAU region 2 */</span><span class="preprocessor"></span></div> |
| <div class="line"><span class="preprocessor"></span><span class="preprocessor">#define SAU_INIT_NSC2 0</span></div> |
| <div class="line"><span class="preprocessor"></span> </div> |
| <div class="line"><span class="preprocessor">#define SAU_INIT_REGION3 1</span></div> |
| <div class="line"><span class="preprocessor"></span><span class="preprocessor">#define SAU_INIT_START3 0x40000000 </span><span class="comment">/* start address of SAU region 3 */</span><span class="preprocessor"></span></div> |
| <div class="line"><span class="preprocessor"></span><span class="preprocessor">#define SAU_INIT_END3 0x40040000 </span><span class="comment">/* end address of SAU region 3 */</span><span class="preprocessor"></span></div> |
| <div class="line"><span class="preprocessor"></span><span class="preprocessor">#define SAU_INIT_NSC3 0</span></div> |
| <div class="line"><span class="preprocessor"></span> </div> |
| <div class="line"><span class="preprocessor">#define SAU_INIT_REGION4 0</span></div> |
| <div class="line"><span class="preprocessor"></span><span class="preprocessor">#define SAU_INIT_START4 0x00000000 </span><span class="comment">/* start address of SAU region 4 */</span><span class="preprocessor"></span></div> |
| <div class="line"><span class="preprocessor"></span><span class="preprocessor">#define SAU_INIT_END4 0x00000000 </span><span class="comment">/* end address of SAU region 4 */</span><span class="preprocessor"></span></div> |
| <div class="line"><span class="preprocessor"></span><span class="preprocessor">#define SAU_INIT_NSC4 0</span></div> |
| <div class="line"><span class="preprocessor"></span> </div> |
| <div class="line"><span class="preprocessor">#define SAU_INIT_REGION5 0</span></div> |
| <div class="line"><span class="preprocessor"></span><span class="preprocessor">#define SAU_INIT_START5 0x00000000 </span><span class="comment">/* start address of SAU region 5 */</span><span class="preprocessor"></span></div> |
| <div class="line"><span class="preprocessor"></span><span class="preprocessor">#define SAU_INIT_END5 0x00000000 </span><span class="comment">/* end address of SAU region 5 */</span><span class="preprocessor"></span></div> |
| <div class="line"><span class="preprocessor"></span><span class="preprocessor">#define SAU_INIT_NSC5 0</span></div> |
| <div class="line"><span class="preprocessor"></span> </div> |
| <div class="line"><span class="preprocessor">#define SAU_INIT_REGION6 0</span></div> |
| <div class="line"><span class="preprocessor"></span><span class="preprocessor">#define SAU_INIT_START6 0x00000000 </span><span class="comment">/* start address of SAU region 6 */</span><span class="preprocessor"></span></div> |
| <div class="line"><span class="preprocessor"></span><span class="preprocessor">#define SAU_INIT_END6 0x00000000 </span><span class="comment">/* end address of SAU region 6 */</span><span class="preprocessor"></span></div> |
| <div class="line"><span class="preprocessor"></span><span class="preprocessor">#define SAU_INIT_NSC6 0</span></div> |
| <div class="line"><span class="preprocessor"></span> </div> |
| <div class="line"><span class="preprocessor">#define SAU_INIT_REGION7 0</span></div> |
| <div class="line"><span class="preprocessor"></span><span class="preprocessor">#define SAU_INIT_START7 0x00000000 </span><span class="comment">/* start address of SAU region 7 */</span><span class="preprocessor"></span></div> |
| <div class="line"><span class="preprocessor"></span><span class="preprocessor">#define SAU_INIT_END7 0x00000000 </span><span class="comment">/* end address of SAU region 7 */</span><span class="preprocessor"></span></div> |
| <div class="line"><span class="preprocessor">#define SAU_INIT_NSC7 0</span></div> |
| </div><!-- fragment --><h1><a class="anchor" id="sau_sleepexception_sec"></a> |
| Configuration of Sleep and Exception behaviour</h1> |
| <table class="cmtable"> |
| <tr> |
| <th>#define </th><th>Value Range </th><th>Default </th><th>Description </th></tr> |
| <tr> |
| <td>CSR_INIT_DEEPSLEEPS </td><td>0 .. 1 </td><td>0 </td><td>value for SCB_CSR register bit DEEPSLEEPS<ul> |
| <li>0: Deep Sleep can be enabled by Secure and Non-Secure state</li> |
| <li>1: Deep Sleep can be enabled by Secure state only </li> |
| </ul> |
| </td></tr> |
| <tr> |
| <td>AIRCR_INIT_SYSRESETREQS </td><td>0 .. 1 </td><td>0 </td><td>value for SCB_AIRCR register bit SYSRESETREQS<ul> |
| <li>0: System reset request accessible from Secure and Non-Secure state</li> |
| <li>1: System reset request accessible from Secure state only </li> |
| </ul> |
| </td></tr> |
| <tr> |
| <td>AIRCR_INIT_PRIS </td><td>0 .. 1 </td><td>0 </td><td>value for SCB_AIRCR register bit PRIS<ul> |
| <li>0: Priority of Non-Secure exceptions is Not altered</li> |
| <li>1: Priority of Non-Secure exceptions is Lowered to 0x80-0xFF </li> |
| </ul> |
| </td></tr> |
| <tr> |
| <td>AIRCR_INIT_BFHFNMINS </td><td>0 .. 1 </td><td>0 </td><td>value for SCB_AIRCR register bit BFHFNMINS<ul> |
| <li>0: BusFault, HardFault, and NMI target are Secure state</li> |
| <li>1: BusFault, HardFault, and NMI target are Non-Secure state </li> |
| </ul> |
| </td></tr> |
| </table> |
| <h1><a class="anchor" id="sau_interrupttarget_sec"></a> |
| Configuration of Interrupt Target settings</h1> |
| <p>Each interrupt has a configuration bit that defines the execution in Secure or Non-secure state. The Non-Secure interrupts have a separate vector table. Refer to <a class="el" href="using_TrustZone_pg.html#Model_TrustZone">Programmers Model with TrustZone</a> for more information.</p> |
| <table class="cmtable"> |
| <tr> |
| <th>#define </th><th>Value Range </th><th>Default </th><th>Description </th></tr> |
| <tr> |
| <td>NVIC_INIT_ITNS<number> </td><td>0x00000000 .. 0xFFFFFFFF<br/> |
| [each bit represents an interrupt] </td><td>0x00000000 </td><td>Interrupt vector target<ul> |
| <li>0: Secure state</li> |
| <li>1: Non-Secure state </li> |
| </ul> |
| </td></tr> |
| </table> |
| <p>The range of <number> is 0 .. (<number of external interrupts> + 31) / 32.</p> |
| <p>The following example shows the configuration for a maximum of 64 external interrupts.</p> |
| <div class="fragment"><div class="line"><span class="preprocessor">#define NVIC_INIT_ITNS0 0x0000122B</span></div> |
| <div class="line"><span class="preprocessor">#define NVIC_INIT_ITNS1 0x0000003A</span></div> |
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