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290 lines
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<div class="title">hab_ivt_t Struct Reference</div> </div>
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<p><code>#include <<a class="el" href="_i_v_t_data_source_8h_source.html">IVTDataSource.h</a>></code></p>
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<table class="memberdecls">
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<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="pub-attribs"></a>
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Public Attributes</h2></td></tr>
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<tr class="memitem:a1b7fc9e9d52309f56b57a9543349bf00"><td class="memItemLeft" align="right" valign="top"><a class="el" href="structhab__hdr__t.html">hab_hdr_t</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="structhab__ivt.html#a1b7fc9e9d52309f56b57a9543349bf00">hdr</a></td></tr>
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<tr class="separator:a1b7fc9e9d52309f56b57a9543349bf00"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:afc055b3b0f6aa49f14f48333bf331982"><td class="memItemLeft" align="right" valign="top">uint32_t </td><td class="memItemRight" valign="bottom"><a class="el" href="structhab__ivt.html#afc055b3b0f6aa49f14f48333bf331982">entry</a></td></tr>
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<tr class="memitem:a6b496edf283c9d3b3b2397e6fd4a8db7"><td class="memItemLeft" align="right" valign="top">uint32_t </td><td class="memItemRight" valign="bottom"><a class="el" href="structhab__ivt.html#a6b496edf283c9d3b3b2397e6fd4a8db7">reserved1</a></td></tr>
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<tr class="separator:a6b496edf283c9d3b3b2397e6fd4a8db7"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:af15467ad5c571cb1989439c412b85a71"><td class="memItemLeft" align="right" valign="top">uint32_t </td><td class="memItemRight" valign="bottom"><a class="el" href="structhab__ivt.html#af15467ad5c571cb1989439c412b85a71">dcd</a></td></tr>
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<tr class="separator:af15467ad5c571cb1989439c412b85a71"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:ad7d705aa6b9f376da4b45dc2aee99112"><td class="memItemLeft" align="right" valign="top">uint32_t </td><td class="memItemRight" valign="bottom"><a class="el" href="structhab__ivt.html#ad7d705aa6b9f376da4b45dc2aee99112">boot_data</a></td></tr>
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<tr class="memitem:a38ad470926876c372e91f4212360338d"><td class="memItemLeft" align="right" valign="top">uint32_t </td><td class="memItemRight" valign="bottom"><a class="el" href="structhab__ivt.html#a38ad470926876c372e91f4212360338d">self</a></td></tr>
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<tr class="separator:a38ad470926876c372e91f4212360338d"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:a117eb7ff63a99d084b07d2fcce5ff1f1"><td class="memItemLeft" align="right" valign="top">uint32_t </td><td class="memItemRight" valign="bottom"><a class="el" href="structhab__ivt.html#a117eb7ff63a99d084b07d2fcce5ff1f1">csf</a></td></tr>
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<tr class="memitem:a2c8ce15b7dd410f382d19515d51d471e"><td class="memItemLeft" align="right" valign="top">uint32_t </td><td class="memItemRight" valign="bottom"><a class="el" href="structhab__ivt.html#a2c8ce15b7dd410f382d19515d51d471e">reserved2</a></td></tr>
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<tr class="separator:a2c8ce15b7dd410f382d19515d51d471e"><td class="memSeparator" colspan="2"> </td></tr>
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</table>
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<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
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<div class="textblock"><p>ivt structure</p>
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<dl class="section user"><dt>Format</dt><dd></dd></dl>
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<p>An ivt consists of a <a class="el" href="structhab__ivt.html#a1b7fc9e9d52309f56b57a9543349bf00">hdr</a> followed by a list of addresses as described further below.</p>
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<dl class="section warning"><dt>Warning</dt><dd>The <em>entry</em> address may not be NULL.</dd>
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<dd>
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On an IC not configured as #HAB_CFG_CLOSED, the <em>csf</em> address may be NULL. If it is not NULL, the <a class="el" href="structhab__ivt.html#a117eb7ff63a99d084b07d2fcce5ff1f1">csf</a> will be processed, but any failures should be non-fatal.</dd>
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<dd>
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On an IC configured as #HAB_CFG_CLOSED, the <em>csf</em> address may not be NULL, and <a class="el" href="structhab__ivt.html#a117eb7ff63a99d084b07d2fcce5ff1f1">csf</a> failures are typically fatal.</dd></dl>
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<dl class="section remark"><dt>Remarks</dt><dd>The Boot Data located using the <em>boot_data</em> field is interpreted by the HAB caller in a boot-mode specific manner. This may be used by the boot ROM as to determine the load address and boot device configuration for images loaded from block devices (see ref_rug for details).</dd>
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<dd>
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All addresses given in the IVT, including the Boot Data (if present) are those for the final load location.</dd></dl>
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<p><a class="anchor" id="ila"></a> </p><dl class="section user"><dt>Initial load addresses</dt><dd></dd></dl>
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<p>The <em>self</em> field is used to calculate addresses in boot modes where an initial portion of the image is loaded to an initial location. In such cases, the IVT, Boot Data (if present) and DCD (if present) are used in configuring the IC and loading the full image to its final location. Only the IVT, Boot Data (if present) and DCD (if present) are required to be within the initial image portion.</p>
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<p>The method for calculating an initial load address for the DCD is illustrated in the following C fragment. Similar calculations apply to other fields.</p>
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<pre class="fragment"> hab_ivt_t* ivt_initial = <initial IVT load address>;
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const void* dcd_initial = ivt_initial->dcd;
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if (ivt_initial->dcd != NULL)
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dcd_initial = (const uint8_t*)ivt_initial
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+ (ivt_initial->dcd - ivt_initial->self)
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</pre><dl class="section note"><dt>Note</dt><dd>The void* types in this structure have been changed to uint32_t so that this code will work correctly when compiled on a 64-bit host. Otherwise the structure would come out incorrect.</dd></dl>
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<p>ivt type </p>
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</div><h2 class="groupheader">Member Data Documentation</h2>
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<a class="anchor" id="ad7d705aa6b9f376da4b45dc2aee99112"></a>
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<td class="memname">uint32_t hab_ivt_t::boot_data</td>
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</table>
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</div><div class="memdoc">
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<p>Absolute address of the Boot Data: may be NULL, but not interpreted any further by HAB </p>
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<a class="anchor" id="a117eb7ff63a99d084b07d2fcce5ff1f1"></a>
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<td class="memname">uint32_t hab_ivt_t::csf</td>
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</div><div class="memdoc">
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<p>Absolute address of the image CSF. </p>
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<a class="anchor" id="af15467ad5c571cb1989439c412b85a71"></a>
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<td class="memname">uint32_t hab_ivt_t::dcd</td>
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</div><div class="memdoc">
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<p>Absolute address of the image DCD: may be NULL. </p>
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<td class="memname">uint32_t hab_ivt_t::entry</td>
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</div><div class="memdoc">
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<p>Absolute address of the first instruction to execute from the image </p>
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<td class="memname"><a class="el" href="structhab__hdr__t.html">hab_hdr_t</a> hab_ivt_t::hdr</td>
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</tr>
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</table>
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</div><div class="memdoc">
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<p><a class="el" href="structhab__ivt.html#a1b7fc9e9d52309f56b57a9543349bf00">hdr</a> with tag #HAB_TAG_IVT, length and HAB version fields (see data) </p>
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<a class="anchor" id="a6b496edf283c9d3b3b2397e6fd4a8db7"></a>
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<td class="memname">uint32_t hab_ivt_t::reserved1</td>
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</div><div class="memdoc">
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<p>Reserved in this version of HAB: should be NULL. </p>
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<td class="memname">uint32_t hab_ivt_t::reserved2</td>
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</div><div class="memdoc">
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<p>Reserved in this version of HAB: should be zero. </p>
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<td class="memname">uint32_t hab_ivt_t::self</td>
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</div><div class="memdoc">
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<p>Absolute address of the IVT. </p>
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</div>
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</div>
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<hr/>The documentation for this struct was generated from the following file:<ul>
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<li><a class="el" href="_i_v_t_data_source_8h_source.html">IVTDataSource.h</a></li>
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</ul>
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<ul>
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<li class="navelem"><a class="el" href="structhab__ivt.html">hab_ivt</a></li>
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<li class="footer">Generated on Mon Mar 7 2016 16:49:51 for Kinetis Bootloader Host by
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<a href="http://www.doxygen.org/index.html">
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<img class="footer" src="doxygen.png" alt="doxygen"/></a> 1.8.11 </li>
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