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TomAwezome ff46cd0df2 Fix GrZoomInScreen.
2021-09-21 23:45:45 -04:00

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<a name="l1"></a><span class=cF1>Bool</span><span class=cF0> </span><span class=cFD>Mem32DevIns</span><span class=cF0>(</span><span class=cF9>CMemRange</span><span class=cF0> *tmpmr)
<a name="l2"></a>{
<a name="l3"></a> </span><span class=cF9>CMemRange</span><span class=cF0> *tmpmr1 = </span><span class=cFB>dev</span><span class=cF0>.mem32_head.next, *tmpmr2;
<a name="l4"></a>
<a name="l5"></a> </span><span class=cF1>while</span><span class=cF0> (tmpmr1 != &amp;</span><span class=cFB>dev</span><span class=cF0>.mem32_head)
<a name="l6"></a> </span><span class=cF7>{</span><span class=cF0>
<a name="l7"></a> </span><span class=cF1>if</span><span class=cF0> (!tmpmr1-&gt;type &amp;&amp; tmpmr-&gt;base &gt;= tmpmr1-&gt;base &amp;&amp; tmpmr-&gt;base + tmpmr-&gt;size &lt;= tmpmr1-&gt;base + tmpmr1-&gt;size)
<a name="l8"></a> {
<a name="l9"></a> </span><span class=cF1>if</span><span class=cF0> (tmpmr-&gt;base &gt; tmpmr1-&gt;base)
<a name="l10"></a> </span><span class=cF7>{</span><span class=cF0>
<a name="l11"></a> tmpmr2 = </span><span class=cF5>SysMAlloc</span><span class=cF0>(</span><span class=cF1>sizeof</span><span class=cF7>(</span><span class=cF9>CMemRange</span><span class=cF7>)</span><span class=cF0>);
<a name="l12"></a> tmpmr2-&gt;type = </span><span class=cF3>MRT_UNUSED</span><span class=cF0>;
<a name="l13"></a> tmpmr2-&gt;flags = </span><span class=cFE>0</span><span class=cF0>;
<a name="l14"></a> tmpmr2-&gt;base = tmpmr1-&gt;base;
<a name="l15"></a> tmpmr2-&gt;size = tmpmr-&gt;base - tmpmr1-&gt;base;
<a name="l16"></a> </span><span class=cF5>QueueInsertRev</span><span class=cF0>(tmpmr2, tmpmr1);
<a name="l17"></a> </span><span class=cF7>}</span><span class=cF0>
<a name="l18"></a> </span><span class=cF5>QueueInsertRev</span><span class=cF0>(tmpmr, tmpmr1);
<a name="l19"></a> tmpmr1-&gt;size = tmpmr1-&gt;base + tmpmr1-&gt;size - (tmpmr-&gt;base + tmpmr-&gt;size);
<a name="l20"></a> tmpmr1-&gt;base = tmpmr-&gt;base + tmpmr-&gt;size;
<a name="l21"></a> </span><span class=cF1>if</span><span class=cF0> (!tmpmr1-&gt;size)
<a name="l22"></a> </span><span class=cF7>{</span><span class=cF0>
<a name="l23"></a> </span><span class=cF5>QueueRemove</span><span class=cF0>(tmpmr1);
<a name="l24"></a> </span><span class=cF5>Free</span><span class=cF0>(tmpmr1);
<a name="l25"></a> </span><span class=cF7>}</span><span class=cF0>
<a name="l26"></a> </span><span class=cF1>return</span><span class=cF0> </span><span class=cF3>TRUE</span><span class=cF0>;
<a name="l27"></a> }
<a name="l28"></a> tmpmr1 = tmpmr1-&gt;next;
<a name="l29"></a> </span><span class=cF7>}</span><span class=cF0>
<a name="l30"></a>
<a name="l31"></a> </span><span class=cF1>return</span><span class=cF0> </span><span class=cF3>FALSE</span><span class=cF0>;
<a name="l32"></a>}
<a name="l33"></a>
<a name="l34"></a></span><span class=cF1>U0</span><span class=cF0> </span><span class=cFD>Mem32DevInit</span><span class=cF0>()
<a name="l35"></a>{
<a name="l36"></a> </span><span class=cF9>CMemRange</span><span class=cF0> *tmpmr;
<a name="l37"></a> </span><span class=cF9>CMemE820</span><span class=cF0> *m20 = </span><span class=cFD>MEM_E820</span><span class=cF0>;
<a name="l38"></a>
<a name="l39"></a> </span><span class=cF5>QueueInit</span><span class=cF0>(&amp;</span><span class=cFB>dev</span><span class=cF0>.mem32_head);
<a name="l40"></a> tmpmr = </span><span class=cF5>SysMAlloc</span><span class=cF0>(</span><span class=cF1>sizeof</span><span class=cF7>(</span><span class=cF9>CMemRange</span><span class=cF7>)</span><span class=cF0>);
<a name="l41"></a> tmpmr-&gt;type = </span><span class=cF3>MRT_UNUSED</span><span class=cF0>;
<a name="l42"></a> tmpmr-&gt;flags = </span><span class=cFE>0</span><span class=cF0>;
<a name="l43"></a></span><span class=cF2>//Maybe !!! Change this to 0xF0000000 !!!</span><span class=cF0>
<a name="l44"></a> tmpmr-&gt;base = </span><span class=cFE>0xE0000000</span><span class=cF0>;
<a name="l45"></a> tmpmr-&gt;size = </span><span class=cFE>0x10000000</span><span class=cF0>;
<a name="l46"></a> </span><span class=cF5>QueueInsert</span><span class=cF0>(tmpmr, </span><span class=cFB>dev</span><span class=cF0>.mem32_head.last);
<a name="l47"></a>
<a name="l48"></a> </span><span class=cF1>if</span><span class=cF0> (m20-&gt;type)
<a name="l49"></a> </span><span class=cF7>{</span><span class=cF0>
<a name="l50"></a> </span><span class=cF1>while</span><span class=cF0> (m20-&gt;type)
<a name="l51"></a> {
<a name="l52"></a> tmpmr = </span><span class=cF5>SysMAlloc</span><span class=cF0>(</span><span class=cF1>sizeof</span><span class=cF7>(</span><span class=cF9>CMemRange</span><span class=cF7>)</span><span class=cF0>);
<a name="l53"></a> tmpmr-&gt;type = m20-&gt;type;
<a name="l54"></a> tmpmr-&gt;flags = </span><span class=cFE>0</span><span class=cF0>;
<a name="l55"></a> tmpmr-&gt;base = m20-&gt;base;
<a name="l56"></a> tmpmr-&gt;size = m20-&gt;len;
<a name="l57"></a> </span><span class=cF1>if</span><span class=cF0> (!</span><span class=cFD>Mem32DevIns</span><span class=cF7>(</span><span class=cF0>tmpmr</span><span class=cF7>)</span><span class=cF0>)
<a name="l58"></a> </span><span class=cF5>Free</span><span class=cF0>(tmpmr);
<a name="l59"></a> m20++;
<a name="l60"></a> }
<a name="l61"></a> </span><span class=cF7>}</span><span class=cF0>
<a name="l62"></a>}
<a name="l63"></a>
<a name="l64"></a></span><span class=cF1>U8</span><span class=cF0> *</span><span class=cF5>Mem32DevAlloc</span><span class=cF0>(</span><span class=cF9>I64</span><span class=cF0> size, </span><span class=cF9>I64</span><span class=cF0> alignment)
<a name="l65"></a>{</span><span class=cF2>//Alloc 32-bit addr space for device. (Doesn't work.) Not used.</span><span class=cF0>
<a name="l66"></a></span><span class=cF2>//For this to work the BIOS E820 map must be searched for gaps in</span><span class=cF0>
<a name="l67"></a> </span><span class=cF2>//the 32-bit range and the pool initialized to the gaps.</span><span class=cF0>
<a name="l68"></a> </span><span class=cF1>U8</span><span class=cF0> *base, *limit;
<a name="l69"></a> </span><span class=cF9>CMemRange</span><span class=cF0> *tmpmr, *tmpmr1;
<a name="l70"></a>
<a name="l71"></a> </span><span class=cF1>while</span><span class=cF0> (</span><span class=cF5>LBts</span><span class=cF7>(</span><span class=cF0>&amp;</span><span class=cFB>sys_semas</span><span class=cF0>[</span><span class=cF3>SEMA_DEV_MEM</span><span class=cF0>], </span><span class=cFE>0</span><span class=cF7>)</span><span class=cF0>)
<a name="l72"></a> </span><span class=cF5>Yield</span><span class=cF0>;
<a name="l73"></a> tmpmr1 = </span><span class=cFB>dev</span><span class=cF0>.mem32_head.next;
<a name="l74"></a> </span><span class=cF1>while</span><span class=cF0> (tmpmr1 != &amp;</span><span class=cFB>dev</span><span class=cF0>.mem32_head)
<a name="l75"></a> </span><span class=cF7>{</span><span class=cF0>
<a name="l76"></a> base = (tmpmr1-&gt;base + alignment - </span><span class=cFE>1</span><span class=cF0>) &amp; ~(alignment - </span><span class=cFE>1</span><span class=cF0>);
<a name="l77"></a> limit = base + size - </span><span class=cFE>1</span><span class=cF0>;
<a name="l78"></a> </span><span class=cF1>if</span><span class=cF0> (!tmpmr1-&gt;type &amp;&amp; limit &lt; tmpmr1-&gt;base + tmpmr1-&gt;size)
<a name="l79"></a> {
<a name="l80"></a> tmpmr = </span><span class=cF5>SysMAlloc</span><span class=cF0>(</span><span class=cF1>sizeof</span><span class=cF7>(</span><span class=cF9>CMemRange</span><span class=cF7>)</span><span class=cF0>);
<a name="l81"></a> tmpmr-&gt;type = </span><span class=cF3>MRT_DEV</span><span class=cF0>;
<a name="l82"></a> tmpmr-&gt;flags = </span><span class=cFE>0</span><span class=cF0>;
<a name="l83"></a> tmpmr-&gt;base = base;
<a name="l84"></a> tmpmr-&gt;size = size;
<a name="l85"></a> </span><span class=cF1>if</span><span class=cF0> (!</span><span class=cFD>Mem32DevIns</span><span class=cF7>(</span><span class=cF0>tmpmr</span><span class=cF7>)</span><span class=cF0>)
<a name="l86"></a> </span><span class=cF7>{</span><span class=cF0>
<a name="l87"></a> </span><span class=cF5>Free</span><span class=cF0>(tmpmr);
<a name="l88"></a> </span><span class=cF5>LBtr</span><span class=cF0>(&amp;</span><span class=cFB>sys_semas</span><span class=cF0>[</span><span class=cF3>SEMA_DEV_MEM</span><span class=cF0>], </span><span class=cFE>0</span><span class=cF0>);
<a name="l89"></a> </span><span class=cF1>return</span><span class=cF0> </span><span class=cF3>NULL</span><span class=cF0>;
<a name="l90"></a> </span><span class=cF7>}</span><span class=cF0>
<a name="l91"></a> </span><span class=cF5>LBtr</span><span class=cF0>(&amp;</span><span class=cFB>sys_semas</span><span class=cF0>[</span><span class=cF3>SEMA_DEV_MEM</span><span class=cF0>], </span><span class=cFE>0</span><span class=cF0>);
<a name="l92"></a> </span><span class=cF1>return</span><span class=cF0> tmpmr-&gt;base;
<a name="l93"></a> }
<a name="l94"></a> tmpmr1 = tmpmr1-&gt;next;
<a name="l95"></a> </span><span class=cF7>}</span><span class=cF0>
<a name="l96"></a> </span><span class=cF5>LBtr</span><span class=cF0>(&amp;</span><span class=cFB>sys_semas</span><span class=cF0>[</span><span class=cF3>SEMA_DEV_MEM</span><span class=cF0>], </span><span class=cFE>0</span><span class=cF0>);
<a name="l97"></a>
<a name="l98"></a> </span><span class=cF1>return</span><span class=cF0> </span><span class=cF3>NULL</span><span class=cF0>;
<a name="l99"></a>}
<a name="l100"></a>
<a name="l101"></a></span><span class=cF1>U0</span><span class=cF0> </span><span class=cF5>Mem32DevFree</span><span class=cF0>(</span><span class=cF1>U8</span><span class=cF0> *base)
<a name="l102"></a>{</span><span class=cF2>//Free 32-bit device address space.</span><span class=cF0>
<a name="l103"></a> </span><span class=cF9>CMemRange</span><span class=cF0> *tmpmr;
<a name="l104"></a>
<a name="l105"></a> </span><span class=cF1>if</span><span class=cF0> (!base)
<a name="l106"></a> </span><span class=cF1>return</span><span class=cF0>;
<a name="l107"></a> </span><span class=cF1>while</span><span class=cF0> (</span><span class=cF5>LBts</span><span class=cF7>(</span><span class=cF0>&amp;</span><span class=cFB>sys_semas</span><span class=cF0>[</span><span class=cF3>SEMA_DEV_MEM</span><span class=cF0>], </span><span class=cFE>0</span><span class=cF7>)</span><span class=cF0>)
<a name="l108"></a> </span><span class=cF5>Yield</span><span class=cF0>;
<a name="l109"></a> tmpmr = </span><span class=cFB>dev</span><span class=cF0>.mem32_head.next;
<a name="l110"></a> </span><span class=cF1>while</span><span class=cF0> (tmpmr != &amp;</span><span class=cFB>dev</span><span class=cF0>.mem32_head)
<a name="l111"></a> </span><span class=cF7>{</span><span class=cF0>
<a name="l112"></a> </span><span class=cF1>if</span><span class=cF0> (tmpmr-&gt;base == base)
<a name="l113"></a> {
<a name="l114"></a> tmpmr-&gt;type = </span><span class=cF3>MRT_UNUSED</span><span class=cF0>;
<a name="l115"></a> </span><span class=cF1>break</span><span class=cF0>;
<a name="l116"></a> }
<a name="l117"></a> tmpmr = tmpmr-&gt;next;
<a name="l118"></a> </span><span class=cF7>}</span><span class=cF0>
<a name="l119"></a> </span><span class=cF5>LBtr</span><span class=cF0>(&amp;</span><span class=cFB>sys_semas</span><span class=cF0>[</span><span class=cF3>SEMA_DEV_MEM</span><span class=cF0>], </span><span class=cFE>0</span><span class=cF0>);
<a name="l120"></a>}
<a name="l121"></a>
<a name="l122"></a></span><span class=cF1>U8</span><span class=cF0> *</span><span class=cF5>Mem64DevAlloc</span><span class=cF0>(</span><span class=cF9>I64</span><span class=cF0> *_pages1Gig)
<a name="l123"></a>{</span><span class=cF2>//Alloc 64-bit addr space for device.</span><span class=cF0>
<a name="l124"></a> </span><span class=cF1>U8</span><span class=cF0> *a;
<a name="l125"></a> </span><span class=cF9>I64</span><span class=cF0> i = *_pages1Gig, *pte;
<a name="l126"></a>
<a name="l127"></a> </span><span class=cF1>while</span><span class=cF0> (</span><span class=cF5>LBts</span><span class=cF7>(</span><span class=cF0>&amp;</span><span class=cFB>sys_semas</span><span class=cF0>[</span><span class=cF3>SEMA_DEV_MEM</span><span class=cF0>], </span><span class=cFE>0</span><span class=cF7>)</span><span class=cF0>)
<a name="l128"></a> </span><span class=cF5>Yield</span><span class=cF0>;
<a name="l129"></a> </span><span class=cF1>while</span><span class=cF0> (i--)
<a name="l130"></a> </span><span class=cF7>{</span><span class=cF0>
<a name="l131"></a> a = </span><span class=cFB>dev</span><span class=cF0>.mem64_ptr -= </span><span class=cFE>1</span><span class=cF0> &lt;&lt; </span><span class=cFE>30</span><span class=cF0>;
<a name="l132"></a> </span><span class=cF1>do</span><span class=cF0>
<a name="l133"></a> {
<a name="l134"></a> pte = </span><span class=cF5>MemPageTable</span><span class=cF0>(a);
<a name="l135"></a> *pte = *pte &amp; ~</span><span class=cFE>0x18</span><span class=cF0> | </span><span class=cFE>0x11</span><span class=cF0>; </span><span class=cF2>//Uncached and present</span><span class=cF0>
<a name="l136"></a> </span><span class=cF5>InvalidatePage</span><span class=cF0>(</span><span class=cFB>dev</span><span class=cF0>.mem64_ptr);
<a name="l137"></a> a += </span><span class=cFB>mem_page_size</span><span class=cF0>;
<a name="l138"></a> }
<a name="l139"></a> </span><span class=cF1>while</span><span class=cF0> (a - </span><span class=cFB>dev</span><span class=cF0>.mem64_ptr &lt; </span><span class=cFE>1</span><span class=cF0> &lt;&lt; </span><span class=cFE>30</span><span class=cF0>);
<a name="l140"></a> </span><span class=cF7>}</span><span class=cF0>
<a name="l141"></a> </span><span class=cF5>LBtr</span><span class=cF0>(&amp;</span><span class=cFB>sys_semas</span><span class=cF0>[</span><span class=cF3>SEMA_DEV_MEM</span><span class=cF0>], </span><span class=cFE>0</span><span class=cF0>);
<a name="l142"></a> </span><span class=cF1>return</span><span class=cF0> </span><span class=cFB>dev</span><span class=cF0>.mem64_ptr;
<a name="l143"></a>}
<a name="l144"></a>
<a name="l145"></a></span><span class=cF1>U0</span><span class=cF0> </span><span class=cF5>Mem64DevFree</span><span class=cF0>(</span><span class=cF1>U8</span><span class=cF0> *base, </span><span class=cF9>I64</span><span class=cF0> pages1Gig)
<a name="l146"></a>{</span><span class=cF2>//Free 64-bit device address space.</span><span class=cF0>
<a name="l147"></a> </span><span class=cF1>if</span><span class=cF0> (!base)
<a name="l148"></a> </span><span class=cF1>return</span><span class=cF0>;
<a name="l149"></a> </span><span class=cF1>while</span><span class=cF0> (</span><span class=cF5>LBts</span><span class=cF7>(</span><span class=cF0>&amp;</span><span class=cFB>sys_semas</span><span class=cF0>[</span><span class=cF3>SEMA_DEV_MEM</span><span class=cF0>], </span><span class=cFE>0</span><span class=cF7>)</span><span class=cF0>)
<a name="l150"></a> </span><span class=cF5>Yield</span><span class=cF0>;
<a name="l151"></a> </span><span class=cF1>if</span><span class=cF0> (base == </span><span class=cFB>dev</span><span class=cF0>.mem64_ptr)
<a name="l152"></a> </span><span class=cFB>dev</span><span class=cF0>.mem64_ptr += pages1Gig * </span><span class=cFE>1</span><span class=cF0> &lt;&lt; </span><span class=cFE>30</span><span class=cF0>;
<a name="l153"></a></span><span class=cF2>//else not freed</span><span class=cF0>
<a name="l154"></a> </span><span class=cF5>LBtr</span><span class=cF0>(&amp;</span><span class=cFB>sys_semas</span><span class=cF0>[</span><span class=cF3>SEMA_DEV_MEM</span><span class=cF0>], </span><span class=cFE>0</span><span class=cF0>);
<a name="l155"></a>}
<a name="l156"></a>
<a name="l157"></a></span><span class=cF1>U0</span><span class=cF0> </span><span class=cFD>UncachedAliasAlloc</span><span class=cF0>() </span><span class=cF2>//Make uncached alias for 4 lowest Gig.</span><span class=cF0>
<a name="l158"></a>{
<a name="l159"></a> </span><span class=cF9>I64</span><span class=cF0> i = </span><span class=cFE>4</span><span class=cF0>, *pte;
<a name="l160"></a> </span><span class=cF1>U8</span><span class=cF0> *a;
<a name="l161"></a>
<a name="l162"></a> a = </span><span class=cFB>dev</span><span class=cF0>.uncached_alias = </span><span class=cF5>Mem64DevAlloc</span><span class=cF0>(&amp;i);
<a name="l163"></a> </span><span class=cF1>do</span><span class=cF0>
<a name="l164"></a> </span><span class=cF7>{</span><span class=cF0>
<a name="l165"></a> pte = </span><span class=cF5>MemPageTable</span><span class=cF0>(a);
<a name="l166"></a> *pte = </span><span class=cFE>0x197</span><span class=cF0> + a - </span><span class=cFB>dev</span><span class=cF0>.uncached_alias;
<a name="l167"></a> </span><span class=cF5>InvalidatePage</span><span class=cF0>(a);
<a name="l168"></a> a += </span><span class=cFB>mem_page_size</span><span class=cF0>;
<a name="l169"></a> </span><span class=cF7>}</span><span class=cF0>
<a name="l170"></a> </span><span class=cF1>while</span><span class=cF0> (a - </span><span class=cFB>dev</span><span class=cF0>.uncached_alias &lt; </span><span class=cFE>1</span><span class=cF0> &lt;&lt; </span><span class=cFE>32</span><span class=cF0>);
<a name="l171"></a>}
<a name="l172"></a>
<a name="l173"></a></span><span class=cF9>I64</span><span class=cF0> </span><span class=cF5>MemBIOSTotal</span><span class=cF0>()
<a name="l174"></a>{</span><span class=cF2>//Returns max of either E801 or E820 mem map.</span><span class=cF0>
<a name="l175"></a> </span><span class=cF9>I64</span><span class=cF0> total01 = </span><span class=cFE>0x100000</span><span class=cF0>, total20 = </span><span class=cFE>0</span><span class=cF0>;
<a name="l176"></a> </span><span class=cF9>U16</span><span class=cF0> *mem01 = </span><span class=cFD>MEM_E801</span><span class=cF0>;
<a name="l177"></a> </span><span class=cF9>CMemE820</span><span class=cF0> *mem20 = </span><span class=cFD>MEM_E820</span><span class=cF0>;
<a name="l178"></a>
<a name="l179"></a> total01 += mem01[</span><span class=cFE>0</span><span class=cF0>] * </span><span class=cFE>1024</span><span class=cF0>; </span><span class=cF2>//First U16 is mem between 1MiB and 16 MiB in KiB.</span><span class=cF0>
<a name="l180"></a> total01 += mem01[</span><span class=cFE>1</span><span class=cF0>] * </span><span class=cFE>64</span><span class=cF0> * </span><span class=cFE>1024</span><span class=cF0>;</span><span class=cF2>//Second U16 is mem above 16MiB (until it encounters a hole) in 64KiB blocks.</span><span class=cF0>
<a name="l181"></a>
<a name="l182"></a> </span><span class=cF1>if</span><span class=cF0> (mem20-&gt;type)
<a name="l183"></a> </span><span class=cF7>{</span><span class=cF0>
<a name="l184"></a> </span><span class=cF1>while</span><span class=cF0> (mem20-&gt;type)
<a name="l185"></a> {
<a name="l186"></a> </span><span class=cF1>if</span><span class=cF0> (mem20-&gt;type == </span><span class=cF3>MEM_E820t_USABLE</span><span class=cF0>)
<a name="l187"></a> total20 += mem20-&gt;len;
<a name="l188"></a> mem20++;
<a name="l189"></a> }
<a name="l190"></a> </span><span class=cF7>}</span><span class=cF0>
<a name="l191"></a> </span><span class=cF1>return</span><span class=cF0> </span><span class=cF5>MaxI64</span><span class=cF0>(total01, total20);
<a name="l192"></a>}
<a name="l193"></a>
<a name="l194"></a></span><span class=cF9>I64</span><span class=cF0> </span><span class=cF5>Scale2Mem</span><span class=cF0>(</span><span class=cF9>I64</span><span class=cF0> min, </span><span class=cF9>I64</span><span class=cF0> max, </span><span class=cF9>I64</span><span class=cF0> limit=</span><span class=cFE>2</span><span class=cF0>*</span><span class=cFE>1024</span><span class=cF0>*</span><span class=cFE>1024</span><span class=cF0>*</span><span class=cFE>1024</span><span class=cF0>)
<a name="l195"></a>{</span><span class=cF2>//Helps pick DiskCache and RAMDisk sizes.</span><span class=cF0>
<a name="l196"></a></span><span class=cF2>//Can be used in </span><a href="https://zeal-operating-system.github.io/ZealOS/System/Boot/BootHDIns.CC.html#l25"><span class=cF4>BootHDIns</span></a><span class=cF2>() config scripts.</span><span class=cF0>
<a name="l197"></a> </span><span class=cF9>I64</span><span class=cF0> i;
<a name="l198"></a>
<a name="l199"></a> </span><span class=cF1>if</span><span class=cF0> (</span><span class=cFB>sys_data_bp</span><span class=cF0>)
<a name="l200"></a> i = </span><span class=cFB>sys_data_bp</span><span class=cF0>-&gt;alloced_u8s;
<a name="l201"></a> </span><span class=cF1>else</span><span class=cF0>
<a name="l202"></a> i = </span><span class=cFB>sys_code_bp</span><span class=cF0>-&gt;alloced_u8s;
<a name="l203"></a> </span><span class=cF1>if</span><span class=cF0> (i &gt;= limit)
<a name="l204"></a> </span><span class=cF1>return</span><span class=cF0> max;
<a name="l205"></a> </span><span class=cF1>else</span><span class=cF0>
<a name="l206"></a> </span><span class=cF1>return</span><span class=cF0> min + (max - min) * i / limit;
<a name="l207"></a>}
<a name="l208"></a>
<a name="l209"></a></span><span class=cF9>I64</span><span class=cF0> </span><span class=cF5>Seg2Linear</span><span class=cF0>(</span><span class=cF9>U32</span><span class=cF0> *ptr)
<a name="l210"></a>{</span><span class=cF2>//Convert 32-bit segmented farptr to linear address. Modify in place.</span><span class=cF0>
<a name="l211"></a> *ptr = *ptr &gt;&gt; </span><span class=cFE>16</span><span class=cF0> &lt;&lt; </span><span class=cFE>4</span><span class=cF0> + *ptr &amp; </span><span class=cFE>0xFFFF</span><span class=cF0>;
<a name="l212"></a> </span><span class=cF1>return</span><span class=cF0> *ptr;
<a name="l213"></a>}</span></pre></body>
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