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<memberdef kind="variable" id="getfreepage_8c_1a83128501321a91cf4e4f3a90899fa4e8" prot="public" static="yes" mutable="no">
<type>struct <ref refid="structspinLock" kindref="compound">spinLock</ref></type>
<definition>struct spinLock vmmGFPlock</definition>
<argsstring></argsstring>
<name>vmmGFPlock</name>
<initializer>= <ref refid="spinlock_8h_1a0fe85a4f3642683148b25916d6c5eafd" kindref="member">SPIN_LOCK_INITIALIZER</ref></initializer>
<briefdescription>
</briefdescription>
<detaileddescription>
</detaileddescription>
<inbodydescription>
</inbodydescription>
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<type>void *</type>
<definition>void* vmm_getFreePage</definition>
<argsstring>(pidType pid)</argsstring>
<name>vmm_getFreePage</name>
<param>
<type><ref refid="include_2sys_2types_8h_1ae438ba74394b14d7b24b6df3b3b8c252" kindref="member">pidType</ref></type>
<declname>pid</declname>
</param>
<briefdescription>
</briefdescription>
<detaileddescription>
</detaileddescription>
<inbodydescription>
</inbodydescription>
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<references refid="armv6_2spinlock_8c_1a71f03d2ba55111c715b6068254847a53" compoundref="armv6_2spinlock_8c" startline="55" endline="61">spinLock</references>
<referencedby refid="createvirtualspace_8c_1ab7ce06bf4237638127c7f052e8872f8a" compoundref="createvirtualspace_8c" startline="53" endline="191">vmm_createVirtualSpace</referencedby>
</memberdef>
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</briefdescription>
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<programlisting>
<codeline lineno="1"><highlight class="comment">/*-</highlight></codeline>
<codeline lineno="2"><highlight class="comment"><sp/>*<sp/>Copyright<sp/>(c)<sp/>2002-2018<sp/>The<sp/>UbixOS<sp/>Project.</highlight></codeline>
<codeline lineno="3"><highlight class="comment"><sp/>*<sp/>All<sp/>rights<sp/>reserved.</highlight></codeline>
<codeline lineno="4"><highlight class="comment"><sp/>*</highlight></codeline>
<codeline lineno="5"><highlight class="comment"><sp/>*<sp/>This<sp/>was<sp/>developed<sp/>by<sp/>Christopher<sp/>W.<sp/>Olsen<sp/>for<sp/>the<sp/>UbixOS<sp/>Project.</highlight></codeline>
<codeline lineno="6"><highlight class="comment"><sp/>*</highlight></codeline>
<codeline lineno="7"><highlight class="comment"><sp/>*<sp/>Redistribution<sp/>and<sp/>use<sp/>in<sp/>source<sp/>and<sp/>binary<sp/>forms,<sp/>with<sp/>or<sp/>without<sp/>modification,<sp/>are<sp/>permitted</highlight></codeline>
<codeline lineno="8"><highlight class="comment"><sp/>*<sp/>provided<sp/>that<sp/>the<sp/>following<sp/>conditions<sp/>are<sp/>met:</highlight></codeline>
<codeline lineno="9"><highlight class="comment"><sp/>*</highlight></codeline>
<codeline lineno="10"><highlight class="comment"><sp/>*<sp/>1)<sp/>Redistributions<sp/>of<sp/>source<sp/>code<sp/>must<sp/>retain<sp/>the<sp/>above<sp/>copyright<sp/>notice,<sp/>this<sp/>list<sp/>of</highlight></codeline>
<codeline lineno="11"><highlight class="comment"><sp/>*<sp/><sp/><sp/><sp/>conditions,<sp/>the<sp/>following<sp/>disclaimer<sp/>and<sp/>the<sp/>list<sp/>of<sp/>authors.</highlight></codeline>
<codeline lineno="12"><highlight class="comment"><sp/>*<sp/>2)<sp/>Redistributions<sp/>in<sp/>binary<sp/>form<sp/>must<sp/>reproduce<sp/>the<sp/>above<sp/>copyright<sp/>notice,<sp/>this<sp/>list<sp/>of</highlight></codeline>
<codeline lineno="13"><highlight class="comment"><sp/>*<sp/><sp/><sp/><sp/>conditions,<sp/>the<sp/>following<sp/>disclaimer<sp/>and<sp/>the<sp/>list<sp/>of<sp/>authors<sp/>in<sp/>the<sp/>documentation<sp/>and/or</highlight></codeline>
<codeline lineno="14"><highlight class="comment"><sp/>*<sp/><sp/><sp/><sp/>other<sp/>materials<sp/>provided<sp/>with<sp/>the<sp/>distribution.</highlight></codeline>
<codeline lineno="15"><highlight class="comment"><sp/>*<sp/>3)<sp/>Neither<sp/>the<sp/>name<sp/>of<sp/>the<sp/>UbixOS<sp/>Project<sp/>nor<sp/>the<sp/>names<sp/>of<sp/>its<sp/>contributors<sp/>may<sp/>be<sp/>used<sp/>to</highlight></codeline>
<codeline lineno="16"><highlight class="comment"><sp/>*<sp/><sp/><sp/><sp/>endorse<sp/>or<sp/>promote<sp/>products<sp/>derived<sp/>from<sp/>this<sp/>software<sp/>without<sp/>specific<sp/>prior<sp/>written</highlight></codeline>
<codeline lineno="17"><highlight class="comment"><sp/>*<sp/><sp/><sp/><sp/>permission.</highlight></codeline>
<codeline lineno="18"><highlight class="comment"><sp/>*</highlight></codeline>
<codeline lineno="19"><highlight class="comment"><sp/>*<sp/>THIS<sp/>SOFTWARE<sp/>IS<sp/>PROVIDED<sp/>BY<sp/>THE<sp/>AUTHOR<sp/>AND<sp/>CONTRIBUTORS<sp/>"AS<sp/>IS"<sp/>AND<sp/>ANY<sp/>EXPRESS<sp/>OR<sp/>IMPLIED</highlight></codeline>
<codeline lineno="20"><highlight class="comment"><sp/>*<sp/>WARRANTIES,<sp/>INCLUDING,<sp/>BUT<sp/>NOT<sp/>LIMITED<sp/>TO,<sp/>THE<sp/>IMPLIED<sp/>WARRANTIES<sp/>OF<sp/>MERCHANTABILITY<sp/>AND<sp/>FITNESS</highlight></codeline>
<codeline lineno="21"><highlight class="comment"><sp/>*<sp/>FOR<sp/>A<sp/>PARTICULAR<sp/>PURPOSE<sp/>ARE<sp/>DISCLAIMED.<sp/>IN<sp/>NO<sp/>EVENT<sp/>SHALL<sp/>THE<sp/>COPYRIGHT<sp/>OWNER<sp/>OR<sp/>CONTRIBUTORS</highlight></codeline>
<codeline lineno="22"><highlight class="comment"><sp/>*<sp/>BE<sp/>LIABLE<sp/>FOR<sp/>ANY<sp/>DIRECT,<sp/>INDIRECT,<sp/>INCIDENTAL,<sp/>SPECIAL,<sp/>EXEMPLARY,<sp/>OR<sp/>CONSEQUENTIAL<sp/>DAMAGES</highlight></codeline>
<codeline lineno="23"><highlight class="comment"><sp/>*<sp/>(INCLUDING,<sp/>BUT<sp/>NOT<sp/>LIMITED<sp/>TO,<sp/>PROCUREMENT<sp/>OF<sp/>SUBSTITUTE<sp/>GOODS<sp/>OR<sp/>SERVICES;<sp/>LOSS<sp/>OF<sp/>USE,<sp/>DATA,</highlight></codeline>
<codeline lineno="24"><highlight class="comment"><sp/>*<sp/>OR<sp/>PROFITS;<sp/>OR<sp/>BUSINESS<sp/>INTERRUPTION)<sp/>HOWEVER<sp/>CAUSED<sp/>AND<sp/>ON<sp/>ANY<sp/>THEORY<sp/>OF<sp/>LIABILITY,<sp/>WHETHER<sp/>IN</highlight></codeline>
<codeline lineno="25"><highlight class="comment"><sp/>*<sp/>CONTRACT,<sp/>STRICT<sp/>LIABILITY,<sp/>OR<sp/>TORT<sp/>(INCLUDING<sp/>NEGLIGENCE<sp/>OR<sp/>OTHERWISE)<sp/>ARISING<sp/>IN<sp/>ANY<sp/>WAY<sp/>OUT</highlight></codeline>
<codeline lineno="26"><highlight class="comment"><sp/>*<sp/>OF<sp/>THE<sp/>USE<sp/>OF<sp/>THIS<sp/>SOFTWARE,<sp/>EVEN<sp/>IF<sp/>ADVISED<sp/>OF<sp/>THE<sp/>POSSIBILITY<sp/>OF<sp/>SUCH<sp/>DAMAGE.</highlight></codeline>
<codeline lineno="27"><highlight class="comment"><sp/>*/</highlight><highlight class="normal"></highlight></codeline>
<codeline lineno="28"><highlight class="normal"></highlight></codeline>
<codeline lineno="29"><highlight class="normal"></highlight><highlight class="preprocessor">#include<sp/><<ref refid="vmm_8h" kindref="compound">vmm/vmm.h</ref>></highlight><highlight class="normal"></highlight></codeline>
<codeline lineno="30"><highlight class="normal"></highlight><highlight class="preprocessor">#include<sp/><<ref refid="kpanic_8h" kindref="compound">ubixos/kpanic.h</ref>></highlight><highlight class="normal"></highlight></codeline>
<codeline lineno="31"><highlight class="normal"></highlight><highlight class="preprocessor">#include<sp/><<ref refid="spinlock_8h" kindref="compound">ubixos/spinlock.h</ref>></highlight><highlight class="normal"></highlight></codeline>
<codeline lineno="32"><highlight class="normal"></highlight></codeline>
<codeline lineno="33"><highlight class="normal"></highlight><highlight class="keyword">static</highlight><highlight class="normal"><sp/></highlight><highlight class="keyword">struct<sp/></highlight><highlight class="normal"><ref refid="structspinLock" kindref="compound">spinLock</ref><sp/>vmmGFPlock<sp/>=<sp/><ref refid="spinlock_8h_1a0fe85a4f3642683148b25916d6c5eafd" kindref="member">SPIN_LOCK_INITIALIZER</ref>;</highlight></codeline>
<codeline lineno="34"><highlight class="normal"></highlight></codeline>
<codeline lineno="35"><highlight class="normal"></highlight><highlight class="comment">/************************************************************************</highlight></codeline>
<codeline lineno="36"><highlight class="comment"></highlight></codeline>
<codeline lineno="37"><highlight class="comment"><sp/>Function:<sp/>void<sp/>*vmm_getFreePage(pidType<sp/>pid);</highlight></codeline>
<codeline lineno="38"><highlight class="comment"></highlight></codeline>
<codeline lineno="39"><highlight class="comment"><sp/>Description:<sp/>Returns<sp/>A<sp/>Free<sp/>Page<sp/>Mapped<sp/>To<sp/>The<sp/>VM<sp/>Space</highlight></codeline>
<codeline lineno="40"><highlight class="comment"></highlight></codeline>
<codeline lineno="41"><highlight class="comment"><sp/>Notes:</highlight></codeline>
<codeline lineno="42"><highlight class="comment"></highlight></codeline>
<codeline lineno="43"><highlight class="comment"><sp/>07/30/02<sp/>-<sp/>This<sp/>Returns<sp/>A<sp/>Free<sp/>Page<sp/>In<sp/>The<sp/>Top<sp/>1GB<sp/>For<sp/>The<sp/>Kernel</highlight></codeline>
<codeline lineno="44"><highlight class="comment"></highlight></codeline>
<codeline lineno="45" refid="getfreepage_8c_1ad6eff5040ec0334e0003ad532300da0c" refkind="member"><highlight class="comment"><sp/>************************************************************************/</highlight><highlight class="normal"></highlight></codeline>
<codeline lineno="46"><highlight class="normal"></highlight><highlight class="keywordtype">void</highlight><highlight class="normal"><sp/>*<ref refid="getfreepage_8c_1ad6eff5040ec0334e0003ad532300da0c" kindref="member">vmm_getFreePage</ref>(<ref refid="include_2sys_2types_8h_1ae438ba74394b14d7b24b6df3b3b8c252" kindref="member">pidType</ref><sp/>pid)<sp/>{</highlight></codeline>
<codeline lineno="47"><highlight class="normal"><sp/><sp/><ref refid="objgfx30_8h_1a81f3b46fa4ddd984830104840a08da82" kindref="member">uInt16</ref><sp/>x<sp/>=<sp/>0x0,<sp/>y<sp/>=<sp/>0x0;</highlight></codeline>
<codeline lineno="48"><highlight class="normal"><sp/><sp/><ref refid="objgfx30_8h_1ada085051a6d9a8e00a2cb256d1af14ba" kindref="member">uInt32</ref><sp/>*pageTableSrc<sp/>=<sp/>0x0;</highlight></codeline>
<codeline lineno="49"><highlight class="normal"></highlight></codeline>
<codeline lineno="50"><highlight class="normal"><sp/><sp/><ref refid="armv6_2spinlock_8c_1a71f03d2ba55111c715b6068254847a53" kindref="member">spinLock</ref>(&vmmGFPlock);</highlight></codeline>
<codeline lineno="51"><highlight class="normal"></highlight></codeline>
<codeline lineno="52"><highlight class="normal"><sp/><sp/></highlight><highlight class="comment">/*<sp/>Lets<sp/>Search<sp/>For<sp/>A<sp/>Free<sp/>Page<sp/>*/</highlight><highlight class="normal"></highlight></codeline>
<codeline lineno="53"><highlight class="normal"><sp/><sp/></highlight><highlight class="keywordflow">for</highlight><highlight class="normal"><sp/>(x<sp/>=<sp/><ref refid="paging_8h_1ac96f9536624cb5d2e7634f37fa919c4c" kindref="member">PD_INDEX</ref>(<ref refid="vmm_8h_1ad6394b4f60e68fe4e1431fc4e1998957" kindref="member">VMM_KERN_START</ref>);<sp/>x<sp/><=<sp/><ref refid="paging_8h_1ac96f9536624cb5d2e7634f37fa919c4c" kindref="member">PD_INDEX</ref>(<ref refid="vmm_8h_1a8204faafc0c27e418f993e07c2f59f14" kindref="member">VMM_KERN_END</ref>);<sp/>x++)<sp/>{</highlight></codeline>
<codeline lineno="54"><highlight class="normal"></highlight></codeline>
<codeline lineno="55"><highlight class="normal"><sp/><sp/><sp/><sp/></highlight><highlight class="comment">/*<sp/>Set<sp/>Page<sp/>Table<sp/>Address<sp/>*/</highlight><highlight class="normal"></highlight></codeline>
<codeline lineno="56"><highlight class="normal"><sp/><sp/><sp/><sp/>pageTableSrc<sp/>=<sp/>(<ref refid="objgfx30_8h_1ada085051a6d9a8e00a2cb256d1af14ba" kindref="member">uInt32</ref><sp/>*)<sp/>(<ref refid="paging_8h_1a8d42a9a09d9dea53cab3044f51482acc" kindref="member">PT_BASE_ADDR</ref><sp/>+<sp/>(0x1000<sp/>*<sp/>x));</highlight></codeline>
<codeline lineno="57"><highlight class="normal"></highlight></codeline>
<codeline lineno="58"><highlight class="normal"><sp/><sp/><sp/><sp/></highlight><highlight class="keywordflow">for</highlight><highlight class="normal"><sp/>(y<sp/>=<sp/>0x0;<sp/>y<sp/><<sp/>1024;<sp/>y++)<sp/>{</highlight></codeline>
<codeline lineno="59"><highlight class="normal"></highlight></codeline>
<codeline lineno="60"><highlight class="normal"><sp/><sp/><sp/><sp/><sp/><sp/></highlight><highlight class="comment">/*<sp/>Loop<sp/>Through<sp/>The<sp/>Page<sp/>Table<sp/>Find<sp/>An<sp/>UnAllocated<sp/>Page<sp/>*/</highlight><highlight class="normal"></highlight></codeline>
<codeline lineno="61"><highlight class="normal"><sp/><sp/><sp/><sp/><sp/><sp/></highlight><highlight class="keywordflow">if</highlight><highlight class="normal"><sp/>((<ref refid="objgfx30_8h_1ada085051a6d9a8e00a2cb256d1af14ba" kindref="member">uInt32</ref>)<sp/>pageTableSrc[y]<sp/>==<sp/>(<ref refid="objgfx30_8h_1ada085051a6d9a8e00a2cb256d1af14ba" kindref="member">uInt32</ref>)<sp/>0x0)<sp/>{</highlight></codeline>
<codeline lineno="62"><highlight class="normal"></highlight></codeline>
<codeline lineno="63"><highlight class="normal"><sp/><sp/><sp/><sp/><sp/><sp/><sp/><sp/></highlight><highlight class="comment">/*<sp/>Map<sp/>A<sp/>Physical<sp/>Page<sp/>To<sp/>The<sp/>Virtual<sp/>Page<sp/>*/</highlight><highlight class="normal"></highlight></codeline>
<codeline lineno="64"><highlight class="normal"><sp/><sp/><sp/><sp/><sp/><sp/><sp/><sp/></highlight><highlight class="keywordflow">if</highlight><highlight class="normal"><sp/>((<ref refid="paging_8h_1adea68f248df43bddee62a09d945304b0" kindref="member">vmm_remapPage</ref>(<ref refid="vmm_8h_1ab8e4e189a7b1df2a03072ce5b75c89fe" kindref="member">vmm_findFreePage</ref>(pid),<sp/>((x<sp/>*<sp/>0x400000)<sp/>+<sp/>(y<sp/>*<sp/>0x1000)),<sp/><ref refid="paging_8h_1a8b838cda4f0bc79ab8d07eb19dd35420" kindref="member">KERNEL_PAGE_DEFAULT</ref>,<sp/>pid,<sp/>0))<sp/>==<sp/>0x0)</highlight></codeline>
<codeline lineno="65"><highlight class="normal"><sp/><sp/><sp/><sp/><sp/><sp/><sp/><sp/><sp/><sp/><ref refid="armv6_2kpanic_8c_1adb9a182aa071791a306163d50d653deb" kindref="member">kpanic</ref>(</highlight><highlight class="stringliteral">"vmmRemapPage:<sp/>vmm_getFreePage\n"</highlight><highlight class="normal">);</highlight></codeline>
<codeline lineno="66"><highlight class="normal"></highlight></codeline>
<codeline lineno="67"><highlight class="normal"><sp/><sp/><sp/><sp/><sp/><sp/><sp/><sp/></highlight><highlight class="comment">/*<sp/>Clear<sp/>This<sp/>Page<sp/>So<sp/>No<sp/>Garbage<sp/>Is<sp/>There<sp/>*/</highlight><highlight class="normal"></highlight></codeline>
<codeline lineno="68"><highlight class="normal"><sp/><sp/><sp/><sp/><sp/><sp/><sp/><sp/><ref refid="paging_8c_1a8350aa43ff69829ba667ca34d9bcaa7a" kindref="member">vmm_clearVirtualPage</ref>((<ref refid="objgfx30_8h_1ada085051a6d9a8e00a2cb256d1af14ba" kindref="member">uInt32</ref>)<sp/>((x<sp/>*<sp/>0x400000)<sp/>+<sp/>(y<sp/>*<sp/>0x1000)));</highlight></codeline>
<codeline lineno="69"><highlight class="normal"></highlight></codeline>
<codeline lineno="70"><highlight class="normal"><sp/><sp/><sp/><sp/><sp/><sp/><sp/><sp/></highlight><highlight class="comment">/*<sp/>Return<sp/>The<sp/>Address<sp/>Of<sp/>The<sp/>Newly<sp/>Allocate<sp/>Page<sp/>*/</highlight><highlight class="normal"></highlight></codeline>
<codeline lineno="71"><highlight class="normal"><sp/><sp/><sp/><sp/><sp/><sp/><sp/><sp/><ref refid="armv6_2spinlock_8c_1ae29ab191c93f9ead066cb462dd2e7247" kindref="member">spinUnlock</ref>(&vmmGFPlock);</highlight></codeline>
<codeline lineno="72"><highlight class="normal"><sp/><sp/><sp/><sp/><sp/><sp/><sp/><sp/></highlight><highlight class="keywordflow">return</highlight><highlight class="normal"><sp/>((</highlight><highlight class="keywordtype">void</highlight><highlight class="normal"><sp/>*)<sp/>((x<sp/>*<sp/>0x400000)<sp/>+<sp/>(y<sp/>*<sp/>0x1000)));</highlight></codeline>
<codeline lineno="73"><highlight class="normal"><sp/><sp/><sp/><sp/><sp/><sp/>}</highlight></codeline>
<codeline lineno="74"><highlight class="normal"><sp/><sp/><sp/><sp/>}</highlight></codeline>
<codeline lineno="75"><highlight class="normal"><sp/><sp/>}</highlight></codeline>
<codeline lineno="76"><highlight class="normal"></highlight></codeline>
<codeline lineno="77"><highlight class="normal"><sp/><sp/></highlight><highlight class="comment">/*<sp/>If<sp/>No<sp/>Free<sp/>Page<sp/>Was<sp/>Found<sp/>Return<sp/>NULL<sp/>*/</highlight><highlight class="normal"></highlight></codeline>
<codeline lineno="78"><highlight class="normal"><sp/><sp/><ref refid="armv6_2spinlock_8c_1ae29ab191c93f9ead066cb462dd2e7247" kindref="member">spinUnlock</ref>(&vmmGFPlock);</highlight></codeline>
<codeline lineno="79"><highlight class="normal"></highlight></codeline>
<codeline lineno="80"><highlight class="normal"><sp/><sp/></highlight><highlight class="keywordflow">return</highlight><highlight class="normal"><sp/>(0x0);</highlight></codeline>
<codeline lineno="81"><highlight class="normal">}</highlight></codeline>
</programlisting>
<location file="C:/Dev/git/UbixOS/sys/vmm/getfreepage.c"/>
</compounddef>
</doxygen>
