universalisos/docs/html/pssw-reference-manual/group__memory__management.html
Fábio Coutada 7855eab092 feat(import): Complete PikeOS 5.0 ecosystem import from devvm-arch
MAJOR MILESTONE: Successfully imported complete PikeOS 5.0 ecosystem
from Virtual Machine 100 (devvm-arch) on gigabyte Proxmox server.

Import Summary:
- Source Code: 4.3GB, 63,441 files, 14,829 C/C++/H files
- Documentation: 78MB, 37+ PDF manuals covering all PikeOS aspects
- XSD Schemas: 1.8MB, 158 schema files for configuration/code generation
- Test Framework: Complete TFW infrastructure in src/tfw/

Key Components:
 Multi-architecture kernels (ARM v7/v8, PowerPC e500/e500mc/e5500, x86_64)
 Core source libraries (libstand, ssw, p4ext)
 Complete test framework with executables, includes, libraries
 37+ comprehensive PDF documentation (installation, development, platform manuals)
 158 XSD schemas for Eclipse-based code generation and configuration
 AUTOSAR/MISRA safety-critical compliance foundation
 Hardware virtualization support
 Eclipse IDE project configuration (.project, .cproject)

Documentation Categories:
- Installation & User Guides (pikeos-installation-guide.pdf, user manuals)
- Development References (kernel, driver, test framework manuals)
- API & Programming (C/C++ environments, native API extensions)
- Platform Manuals (ARM, PowerPC, x86 specific guides)
- CDK Documentation (gcc, binutils, ld, cpp internals)
- Release Notes (all components for 5.0.3)
- Specialized Topics (hardware virtualization, POSIX compliance)

Technical Achievements:
 Complete PikeOS 5.0 codebase across multiple processor architectures
 Safety-critical foundation with AUTOSAR/MISRA compliance
 Eclipse IDE integration with XSD-driven code generation pipeline
 Comprehensive test framework for validation and verification
 Complete documentation covering development, deployment, and optimization

Extraction Method:
- Source: VM 100 (devvm-arch) on gigabyte server (192.168.0.104)
- Method: Direct LVM disk mount via losetup, rsync transfer
- Size: Total 4.4GB extracted and organized

Next Phases:
- Phase 3: XSD Workflow Analysis (Day 8-10)
- Phase 4: Safety Standards Compliance Documentation (Day 11-12)
- Phase 5: Component Categorization (Day 13-14)
- Phase 6: Aurelio Brain Test (Day 15)

Co-Authored-By: Claude <noreply@anthropic.com>
2026-07-06 21:01:41 +01:00

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<a href="#nested-classes">Data Structures</a> &#124;
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<a href="#func-members">Functions</a> </div>
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<div class="title">Memory Management</div> </div>
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<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
<p>This section describes functions to allocate memory and to retrieve status information from memory pools. </p>
<table class="memberdecls">
<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="nested-classes"></a>
Data Structures</h2></td></tr>
<tr class="memitem:"><td class="memItemLeft" align="right" valign="top">struct &#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="structvm__mem__stat__t.html">vm_mem_stat_t</a></td></tr>
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Typedefs</h2></td></tr>
<tr class="memitem:gac18b4f45a9dae42944f9d644636c96f9"><td class="memItemLeft" align="right" valign="top">typedef P4_uint32_t&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__memory__management.html#gac18b4f45a9dae42944f9d644636c96f9">vm_mem_desc_t</a></td></tr>
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<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="func-members"></a>
Functions</h2></td></tr>
<tr class="memitem:ga2b7f59fad51a4ba666621486103c4f55"><td class="memItemLeft" align="right" valign="top">P4_e_t&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__memory__management.html#ga2b7f59fad51a4ba666621486103c4f55">vm_mem_lookup</a> (<a class="el" href="group__partition__management.html#gaa1d33969ece09c012517ce3f11f83649">vm_part_id_t</a> part_id, const char *name, <a class="el" href="group__memory__management.html#gac18b4f45a9dae42944f9d644636c96f9">vm_mem_desc_t</a> *mh_p)</td></tr>
<tr class="memdesc:ga2b7f59fad51a4ba666621486103c4f55"><td class="mdescLeft">&#160;</td><td class="mdescRight">Retrieve the memory descriptor for a given name. <a href="#ga2b7f59fad51a4ba666621486103c4f55">More...</a><br /></td></tr>
<tr class="separator:ga2b7f59fad51a4ba666621486103c4f55"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:ga8965018bd985ca112893f47ca635f37c"><td class="memItemLeft" align="right" valign="top">P4_e_t&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__memory__management.html#ga8965018bd985ca112893f47ca635f37c">vm_mem_pool_alloc</a> (<a class="el" href="group__memory__management.html#gac18b4f45a9dae42944f9d644636c96f9">vm_mem_desc_t</a> mh, P4_size_t size, P4_address_t vaddr)</td></tr>
<tr class="memdesc:ga8965018bd985ca112893f47ca635f37c"><td class="mdescLeft">&#160;</td><td class="mdescRight">Allocate memory from a partition's memory pool. <a href="#ga8965018bd985ca112893f47ca635f37c">More...</a><br /></td></tr>
<tr class="separator:ga8965018bd985ca112893f47ca635f37c"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:ga6fdfb44cf28d50201e27a1afceeac266"><td class="memItemLeft" align="right" valign="top">P4_e_t&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__memory__management.html#ga6fdfb44cf28d50201e27a1afceeac266">vm_mem_stat</a> (<a class="el" href="group__partition__management.html#gaa1d33969ece09c012517ce3f11f83649">vm_part_id_t</a> part_id, <a class="el" href="group__memory__management.html#gac18b4f45a9dae42944f9d644636c96f9">vm_mem_desc_t</a> mh, <a class="el" href="structvm__mem__stat__t.html">vm_mem_stat_t</a> *pstat)</td></tr>
<tr class="memdesc:ga6fdfb44cf28d50201e27a1afceeac266"><td class="mdescLeft">&#160;</td><td class="mdescRight">Retrieve status information about a memory object. <a href="#ga6fdfb44cf28d50201e27a1afceeac266">More...</a><br /></td></tr>
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<h2 class="groupheader">Typedef Documentation</h2>
<a id="gac18b4f45a9dae42944f9d644636c96f9"></a>
<h2 class="memtitle"><span class="permalink"><a href="#gac18b4f45a9dae42944f9d644636c96f9">&#9670;&nbsp;</a></span>vm_mem_desc_t</h2>
<div class="memitem">
<div class="memproto">
<table class="memname">
<tr>
<td class="memname">typedef P4_uint32_t <a class="el" href="group__memory__management.html#gac18b4f45a9dae42944f9d644636c96f9">vm_mem_desc_t</a></td>
</tr>
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<p>Memory descriptor </p>
</div>
</div>
<h2 class="groupheader">Function Documentation</h2>
<a id="ga2b7f59fad51a4ba666621486103c4f55"></a>
<h2 class="memtitle"><span class="permalink"><a href="#ga2b7f59fad51a4ba666621486103c4f55">&#9670;&nbsp;</a></span>vm_mem_lookup()</h2>
<div class="memitem">
<div class="memproto">
<table class="memname">
<tr>
<td class="memname">P4_e_t vm_mem_lookup </td>
<td>(</td>
<td class="paramtype"><a class="el" href="group__partition__management.html#gaa1d33969ece09c012517ce3f11f83649">vm_part_id_t</a>&#160;</td>
<td class="paramname"><em>part_id</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">const char *&#160;</td>
<td class="paramname"><em>name</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="group__memory__management.html#gac18b4f45a9dae42944f9d644636c96f9">vm_mem_desc_t</a> *&#160;</td>
<td class="paramname"><em>mh_p</em>&#160;</td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td>
</tr>
</table>
</div><div class="memdoc">
<p>Retrieve the memory descriptor for a given name. </p>
<p>A successful call to this function returns the memory descriptor corresponding to the name given by <em>name</em> in the resource partition identified by <em>part_id</em>.</p>
<p>The memory descriptor returned by this function into <code>*mh_p</code> can be used as a handle to <a class="el" href="group__memory__management.html#ga6fdfb44cf28d50201e27a1afceeac266" title="Retrieve status information about a memory object. ">vm_mem_stat()</a>. Memory descriptors are local to each partition, so only a pair of partition id and memory descriptor uniquely identifies a memory requirement in the system. The descriptor can be also used in calls to <a class="el" href="group__memory__management.html#ga8965018bd985ca112893f47ca635f37c" title="Allocate memory from a partition&#39;s memory pool. ">vm_mem_pool_alloc()</a> if the memory requirement is specified in the VMIT with the flag <b>IsPool</b> set to <b>true</b>.</p>
<p>For looking up memory requirements in other partitions than the caller's, the caller partition must have the VM_AB_MONITOR ability.</p>
<p>This function has undefined behavior before <a class="el" href="group__initialization.html#ga1700b78fbc2632387ff7f166ff98af3d" title="Initialize PSSW services. ">vm_init()</a> is invoked.</p>
<p>If <code>mh_p</code> is NULL, this function has undefined behavior.</p>
<p>If this function returns anything but P4_E_OK, the contents of <code>mh_p</code> are unspecified.</p>
<dl class="section return"><dt>Returns</dt><dd></dd></dl>
<dl class="retval"><dt>Return values</dt><dd>
<table class="retval">
<tr><td class="paramname">P4_E_OK</td><td>upon success</td></tr>
<tr><td class="paramname">P4_E_INVAL</td><td>if <em>name</em> is not a valid PSSW name or if <em>part_id</em> refers to an invalid partition.</td></tr>
<tr><td class="paramname">P4_E_NOABILITY</td><td>if the calling partition does not the ability VM_AB_MONITOR and <em>part_id</em> refers to another partition than the caller's partition</td></tr>
<tr><td class="paramname">P4_E_NOENT</td><td>if no memory pool with the given name exists in the given partition.</td></tr>
<tr><td class="paramname">P4_E_ABORT</td><td>if the call was aborted.</td></tr>
<tr><td class="paramname">P4_E_CANCEL</td><td>if the call was canceled.</td></tr>
</table>
</dd>
</dl>
<dl class="section pre"><dt>Precondition</dt><dd><a class="el" href="group__initialization.html#ga1700b78fbc2632387ff7f166ff98af3d" title="Initialize PSSW services. ">vm_init()</a> must have been called at least once by the caller's task.</dd></dl>
<dl class="section see"><dt>See also</dt><dd><a class="el" href="group__initialization.html#ga1700b78fbc2632387ff7f166ff98af3d" title="Initialize PSSW services. ">vm_init()</a>, <a class="el" href="group__memory__management.html#ga8965018bd985ca112893f47ca635f37c" title="Allocate memory from a partition&#39;s memory pool. ">vm_mem_pool_alloc()</a>, and <a class="el" href="group__memory__management.html#ga6fdfb44cf28d50201e27a1afceeac266" title="Retrieve status information about a memory object. ">vm_mem_stat()</a> </dd></dl>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">part_id</td><td>IN: Partition ID <br />
VM_RESPART_MYSELF may be used to refer to the caller's partition. </td></tr>
<tr><td class="paramname">name</td><td>IN: Name of the memory pool as given in the VMIT </td></tr>
<tr><td class="paramname">mh_p</td><td>OUT: Memory pool descriptor. </td></tr>
</table>
</dd>
</dl>
</div>
</div>
<a id="ga8965018bd985ca112893f47ca635f37c"></a>
<h2 class="memtitle"><span class="permalink"><a href="#ga8965018bd985ca112893f47ca635f37c">&#9670;&nbsp;</a></span>vm_mem_pool_alloc()</h2>
<div class="memitem">
<div class="memproto">
<table class="memname">
<tr>
<td class="memname">P4_e_t vm_mem_pool_alloc </td>
<td>(</td>
<td class="paramtype"><a class="el" href="group__memory__management.html#gac18b4f45a9dae42944f9d644636c96f9">vm_mem_desc_t</a>&#160;</td>
<td class="paramname"><em>mh</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">P4_size_t&#160;</td>
<td class="paramname"><em>size</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">P4_address_t&#160;</td>
<td class="paramname"><em>vaddr</em>&#160;</td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td>
</tr>
</table>
</div><div class="memdoc">
<p>Allocate memory from a partition's memory pool. </p>
<p>A successful call to this function allocates <em>size</em> bytes from the memory pool given by <em>mh</em> and maps it to the virtual address given by <em>vaddr</em> in the caller's address space.</p>
<p>If the memory pool contains physically contiguous memory, the allocated memory is also contiguous. Two consecutive calls however are not guaranteed to return physically adjoining segments.</p>
<p>This function can only be used to reference memory pools in the caller's resource partition, therefore, the function has no parameter for a partition ID.</p>
<p>This function has undefined behavior before <a class="el" href="group__initialization.html#ga1700b78fbc2632387ff7f166ff98af3d" title="Initialize PSSW services. ">vm_init()</a> is invoked.</p>
<dl class="section return"><dt>Returns</dt><dd></dd></dl>
<dl class="retval"><dt>Return values</dt><dd>
<table class="retval">
<tr><td class="paramname">P4_E_OK</td><td>upon success</td></tr>
<tr><td class="paramname">P4_E_INVAL</td><td>is returned if - <em>size</em> if zero. - either <em>size</em> or <em>vaddr</em> is not a multiple of P4_PAGESIZE - parts of the virtual address space in the range [<em>vaddr</em> : <em>vaddr</em> + <em>size</em> - 1] are outside of the valid user address space. It is also returned if <code>mh</code> does not refer to a memory pool of the caller's resource partition.</td></tr>
<tr><td class="paramname">P4_E_OVERMAP</td><td>if parts of the virtual address space in the range [<em>vaddr</em> : <em>vaddr</em> <ul>
<li><em>size</em> - 1] are already mapped</li>
</ul>
</td></tr>
<tr><td class="paramname">P4_E_OOMEM</td><td>if there are less than <em>size</em> bytes left in the pool.</td></tr>
<tr><td class="paramname">P4_E_NOKMEM</td><td>if the calling partition has not enough kernel pages left to install the mapping.</td></tr>
<tr><td class="paramname">P4_E_ABORT</td><td>if the call was aborted.</td></tr>
<tr><td class="paramname">P4_E_CANCEL</td><td>if the call was canceled.</td></tr>
</table>
</dd>
</dl>
<dl class="section pre"><dt>Precondition</dt><dd><a class="el" href="group__initialization.html#ga1700b78fbc2632387ff7f166ff98af3d" title="Initialize PSSW services. ">vm_init()</a> must have been called at least once by the caller's task.</dd></dl>
<dl class="section see"><dt>See also</dt><dd><a class="el" href="group__initialization.html#ga1700b78fbc2632387ff7f166ff98af3d" title="Initialize PSSW services. ">vm_init()</a>, <a class="el" href="group__memory__management.html#ga2b7f59fad51a4ba666621486103c4f55" title="Retrieve the memory descriptor for a given name. ">vm_mem_lookup()</a>, <a class="el" href="group__memory__management.html#ga6fdfb44cf28d50201e27a1afceeac266" title="Retrieve status information about a memory object. ">vm_mem_stat()</a> </dd></dl>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">mh</td><td>IN: Memory pool descriptor </td></tr>
<tr><td class="paramname">size</td><td>IN: Number of bytes to allocate, where size must be a multiple of P4_PAGESIZE </td></tr>
<tr><td class="paramname">vaddr</td><td>IN: Virtual address where the memory shall be mapped to </td></tr>
</table>
</dd>
</dl>
</div>
</div>
<a id="ga6fdfb44cf28d50201e27a1afceeac266"></a>
<h2 class="memtitle"><span class="permalink"><a href="#ga6fdfb44cf28d50201e27a1afceeac266">&#9670;&nbsp;</a></span>vm_mem_stat()</h2>
<div class="memitem">
<div class="memproto">
<table class="memname">
<tr>
<td class="memname">P4_e_t vm_mem_stat </td>
<td>(</td>
<td class="paramtype"><a class="el" href="group__partition__management.html#gaa1d33969ece09c012517ce3f11f83649">vm_part_id_t</a>&#160;</td>
<td class="paramname"><em>part_id</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="group__memory__management.html#gac18b4f45a9dae42944f9d644636c96f9">vm_mem_desc_t</a>&#160;</td>
<td class="paramname"><em>mh</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="structvm__mem__stat__t.html">vm_mem_stat_t</a> *&#160;</td>
<td class="paramname"><em>pstat</em>&#160;</td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td>
</tr>
</table>
</div><div class="memdoc">
<p>Retrieve status information about a memory object. </p>
<p>A successful call to this function returns the status of the memory requirement given by <code>mh</code> of the partition given by <em>part_id</em> in the data structure referenced by <em>status</em>.</p>
<p>Refer to the description of the data structure <em><a class="el" href="structvm__mem__stat__t.html">vm_mem_stat_t</a></em> for a detailed description of the memory status.</p>
<p>This function has undefined behavior before <a class="el" href="group__initialization.html#ga1700b78fbc2632387ff7f166ff98af3d" title="Initialize PSSW services. ">vm_init()</a> is invoked.</p>
<p>If <code>pstat</code> is NULL, this function has undefined behavior.</p>
<p>If this function returns anything but P4_E_OK, the contents of <code>pstat</code> are unspecified.</p>
<dl class="section return"><dt>Returns</dt><dd></dd></dl>
<dl class="retval"><dt>Return values</dt><dd>
<table class="retval">
<tr><td class="paramname">P4_E_OK</td><td>upon success</td></tr>
<tr><td class="paramname">P4_E_NOABILITY</td><td>if the calling partition does not the ability VM_AB_MONITOR and <em>part_id</em> refers to another partition than the caller's partition</td></tr>
<tr><td class="paramname">P4_E_INVAL</td><td>if <code>mh</code> does not refer to a valid memory object of the partition <em>part_id</em> or if <em>part_id</em> refers to an invalid partition</td></tr>
<tr><td class="paramname">P4_E_ABORT</td><td>if the call was aborted.</td></tr>
<tr><td class="paramname">P4_E_CANCEL</td><td>if the call was canceled.</td></tr>
</table>
</dd>
</dl>
<dl class="section pre"><dt>Precondition</dt><dd><a class="el" href="group__initialization.html#ga1700b78fbc2632387ff7f166ff98af3d" title="Initialize PSSW services. ">vm_init()</a> must have been called at least once by the caller's task.</dd></dl>
<dl class="section see"><dt>See also</dt><dd><a class="el" href="group__initialization.html#ga1700b78fbc2632387ff7f166ff98af3d" title="Initialize PSSW services. ">vm_init()</a>, <a class="el" href="group__memory__management.html#ga8965018bd985ca112893f47ca635f37c" title="Allocate memory from a partition&#39;s memory pool. ">vm_mem_pool_alloc()</a>, <a class="el" href="group__memory__management.html#ga2b7f59fad51a4ba666621486103c4f55" title="Retrieve the memory descriptor for a given name. ">vm_mem_lookup()</a>, and <a class="el" href="structvm__mem__stat__t.html">vm_mem_stat_t</a> </dd></dl>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">part_id</td><td>IN: Partition ID <br />
VM_RESPART_MYSELF may be used to refer to the caller's partition. </td></tr>
<tr><td class="paramname">mh</td><td>IN: Memory pool descriptor </td></tr>
<tr><td class="paramname">pstat</td><td>OUT: Memory pool status </td></tr>
</table>
</dd>
</dl>
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