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text-indent:-.25in; line-height:200%; mso-pagination:widow-orphan; font-size:10.0pt; font-family:"Times New Roman"; mso-fareast-font-family:"Times New Roman";}p.MsoListNumber4, li.MsoListNumber4, div.MsoListNumber4 {mso-style-parent:"List Number"; margin-top:0in; margin-right:0in; margin-bottom:8.0pt; margin-left:1.25in; text-indent:-.25in; line-height:200%; mso-pagination:widow-orphan; font-size:10.0pt; font-family:"Times New Roman"; mso-fareast-font-family:"Times New Roman";}p.MsoListNumber5, li.MsoListNumber5, div.MsoListNumber5 {mso-style-parent:"List Number"; margin-top:0in; margin-right:0in; margin-bottom:8.0pt; margin-left:1.5in; text-indent:-.25in; line-height:200%; mso-pagination:widow-orphan; font-size:10.0pt; font-family:"Times New Roman"; mso-fareast-font-family:"Times New Roman";}p.MsoTitle, li.MsoTitle, div.MsoTitle {mso-style-parent:"Heading Base"; mso-style-next:Subtitle; margin-top:.25in; margin-right:0in; margin-bottom:8.0pt; margin-left:0in; text-align:center; mso-pagination:widow-orphan lines-together; 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margin-bottom:8.0pt; margin-left:0in; text-align:center; line-height:200%; mso-pagination:widow-orphan; font-size:14.0pt; mso-bidi-font-size:10.0pt; font-family:"Times New Roman"; mso-fareast-font-family:"Times New Roman"; font-weight:bold; mso-bidi-font-weight:normal;}p.MsoBodyTextIndent2, li.MsoBodyTextIndent2, div.MsoBodyTextIndent2 {margin-top:0in; margin-right:0in; margin-bottom:0in; margin-left:1.0in; margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:10.0pt; font-family:"Times New Roman"; mso-fareast-font-family:"Times New Roman";}a:link, span.MsoHyperlink {color:blue; text-decoration:underline; text-underline:single;}a:visited, span.MsoHyperlinkFollowed {color:purple; text-decoration:underline; text-underline:single;}em {mso-style-parent:""; mso-bidi-font-style:normal;}p.AttentionLine, li.AttentionLine, div.AttentionLine {mso-style-name:"Attention Line"; mso-style-parent:"Body Text"; margin-top:0in; margin-right:0in; margin-bottom:8.0pt; margin-left:0in; line-height:200%; mso-pagination:widow-orphan; font-size:10.0pt; font-family:"Times New Roman"; mso-fareast-font-family:"Times New Roman"; font-weight:bold; mso-bidi-font-weight:normal; font-style:italic; mso-bidi-font-style:normal;}p.Author, li.Author, div.Author {mso-style-name:Author; mso-style-parent:"Body Text"; margin-top:48.0pt; margin-right:0in; margin-bottom:0in; margin-left:0in; margin-bottom:.0001pt; text-align:center; line-height:200%; mso-pagination:widow-orphan; font-size:14.0pt; mso-bidi-font-size:10.0pt; font-family:"Times New Roman"; mso-fareast-font-family:"Times New Roman"; font-weight:bold; mso-bidi-font-weight:normal;}p.BlockQuotation, li.BlockQuotation, div.BlockQuotation {mso-style-name:"Block Quotation"; mso-style-parent:"Body Text"; margin-top:0in; margin-right:.5in; margin-bottom:8.0pt; margin-left:.5in; line-height:200%; mso-pagination:widow-orphan lines-together; font-size:10.0pt; font-family:"Times New Roman"; mso-fareast-font-family:"Times New Roman"; font-style:italic; mso-bidi-font-style:normal;}p.BlockQuotationFirst, li.BlockQuotationFirst, div.BlockQuotationFirst {mso-style-name:"Block Quotation First"; 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<div class=Section1>
<p class=TitleCover>Intel Processors Machine Check Architectures in MicrosoftWindows<o:p></o:p></p>
<p class=SectionHeading style='margin-left:0in;text-indent:0in'><o:p> </o:p></p>
<p class=SectionHeading>1.<span style='mso-tab-count:1'>� </span>Introduction</p>
<p class=MsoNormal>Microsoft Windows generic Hardware Abstraction Layers (<spanclass=SpellE>HALs</span>) for Intel Architectures (halx86, <span class=SpellE>halapic</span>,<span class=SpellE>halmps</span>, halia64) support the Machine CheckArchitectures (MCA) for the Intel Pentium� Pro and Itanium processors. The HALenables Machine Check Exception (MCE) reporting for all implementation definederrors. <o:p></o:p></p>
<p class=SectionHeading style='margin-left:0in;text-indent:0in'>2. IntelPentium� Pro Processor Machine Check</p>
<p class=MsoNormal>The Machine Check Exception (MCE) is processor exception 18.The handler for Machine Check Exception is implemented as a task gate formaximum reliability of the exception handler.<span style='mso-spacerun:yes'>�</span>The HAL provides a generic exception handler for all errors that causean exception.<span style='mso-spacerun:yes'>� </span>This handler reports themachine check exception code on the screen and causes the operating system tohalt gracefully, reducing the possibility of persistent data corruption.</p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>In addition, the HAL also provides MCA specific interfacethat can be used by drivers to:</p>
<p class=MsoNormal style='margin-left:.25in;text-indent:-.25in;mso-text-indent-alt:-.25in;mso-list:l0 level1 lfo1;mso-list-change:\F0B7 "Danny Smith" 20010502T0820'><![if !supportLists]><spanstyle='font-family:Symbol;mso-fareast-font-family:Symbol;mso-bidi-font-family:Symbol'><span style='mso-list:Ignore'>�<span style='font:7.0pt "Times New Roman"'> </span></span></span><![endif]>Read the MCA banks to detect an error that doesnot generate an exception. One case where an error does not generate <spanclass=GramE>an <span style='mso-spacerun:yes'>�</span>exception</span> is if thebit controlling reporting of the machine check error for a specific bank (<spanclass=SpellE>MCi_CTL.Eej</span>) bit is turned cleared. There are also somerestartable errors that don�t generate Machine Check Exception and are loggedin the MCA banks.</p>
<p class=MsoNormal style='margin-left:.25in;text-indent:-.25in;mso-text-indent-alt:-.25in;mso-list:l0 level1 lfo1;mso-list-change:\F0B7 "Danny Smith" 20010502T0820'><![if !supportLists]><spanstyle='font-family:Symbol;mso-fareast-font-family:Symbol;mso-bidi-font-family:Symbol'><span style='mso-list:Ignore'>�<span style='font:7.0pt "Times New Roman"'> </span></span></span><![endif]>Obtain control (to possibly log errors to NVRAM)when the Machine Check exception handler is invoked by providing two callbackroutines - ExceptionCallback and DpcCallback</p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=SectionHeading style='margin-left:0in;text-indent:0in'>2.1<spanstyle='mso-tab-count:1'>��� </span>Machine Check Exception Handling</p>
<p class=MsoNormal>If the MCA exception handler detects only Intel Pentium�technology (style) MCE support on the platform, it does the following:</p>
<p class=MsoNormal style='margin-left:.25in;text-indent:-.25in;mso-text-indent-alt:-.25in;mso-list:l0 level1 lfo1;mso-list-change:\F0B7 "Danny Smith" 20010502T0820'><![if !supportLists]><spanstyle='font-family:Symbol;mso-fareast-font-family:Symbol;mso-bidi-font-family:Symbol'><span style='mso-list:Ignore'>�<span style='font:7.0pt "Times New Roman"'> </span></span></span><![endif]>If a MCA driver is registered with the HAL, callthe MCA driver ExceptionCallback function providing the contents of P5_MC_ADDRand P5_MC_TYPE register values. This callback routine can log the registervalues in NVRAM and return.</p>
<p class=MsoNormal style='margin-left:.25in;text-indent:-.25in;mso-text-indent-alt:-.25in;mso-list:l0 level1 lfo1;mso-list-change:\F0B7 "Danny Smith" 20010502T0820'><![if !supportLists]><spanstyle='font-family:Symbol;mso-fareast-font-family:Symbol;mso-bidi-font-family:Symbol'><span style='mso-list:Ignore'>�<span style='font:7.0pt "Times New Roman"'> </span></span></span><![endif]>Call KeBugCheckEx() with the following 4parameters to halt the system <o:p></o:p></p>
<p class=MsoNormal style='margin-left:.75in;text-indent:-.75in;mso-text-indent-alt:-.25in;mso-list:l11 level1 lfo2;mso-list-change:"%1\:1\:0\:\." "Danny Smith" 20010502T0820'><![if !supportLists]><spanstyle='mso-list:Ignore'>1.<span style='font:7.0pt "Times New Roman"'> </span></span><![endif]>Low<span style='mso-spacerun:yes'>� </span>32 bits ofP5_MC_TYPE MSR<o:p></o:p></p>
<p class=MsoNormal style='margin-left:.75in;text-indent:-.75in;mso-text-indent-alt:-.25in;mso-list:l11 level1 lfo3;mso-list-change:"%1\:2\:0\:\." "Danny Smith" 20010502T0820'><![if !supportLists]><spanstyle='mso-list:Ignore'>2.<span style='font:7.0pt "Times New Roman"'> </span></span><![endif]>Always zero<o:p></o:p></p>
<p class=MsoNormal style='margin-left:.75in;text-indent:-.75in;mso-text-indent-alt:-.25in;mso-list:l11 level1 lfo4;mso-list-change:"%1\:3\:0\:\." "Danny Smith" 20010502T0820'><![if !supportLists]><spanstyle='mso-list:Ignore'>3.<span style='font:7.0pt "Times New Roman"'> </span></span><![endif]>High 32 bits of P5_MC_ADDR MSR<o:p></o:p></p>
<p class=MsoNormal style='margin-left:.75in;text-indent:-.75in;mso-text-indent-alt:-.25in;mso-list:l11 level1 lfo5;mso-list-change:"%1\:4\:0\:\." "Danny Smith" 20010502T0820'><![if !supportLists]><spanstyle='mso-list:Ignore'>4.<span style='font:7.0pt "Times New Roman"'> </span></span><![endif]>Low 32 bits of P5_MC_ADDR MSR<o:p></o:p></p>
<span style='font-size:10.0pt;font-family:"Times New Roman";mso-fareast-font-family:"Times New Roman";mso-ansi-language:EN-US;mso-fareast-language:EN-US;mso-bidi-language:AR-SA'><br clear=all style='mso-special-character:line-break;page-break-before:always'></span>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>If MCA support (Pentium Pro processor) on the platform isdetected, the exception handler determines if the error is restartable. If not,it does the following:</p>
<p class=MsoNormal style='margin-left:.25in;text-indent:-.25in;mso-text-indent-alt:-.25in;mso-list:l0 level1 lfo1;mso-list-change:\F0B7 "Danny Smith" 20010502T0820'><![if !supportLists]><spanstyle='font-family:Symbol;mso-fareast-font-family:Symbol;mso-bidi-font-family:Symbol'><span style='mso-list:Ignore'>�<span style='font:7.0pt "Times New Roman"'> </span></span></span><![endif]>call the MCA Driver ExceptionCallback routine togive the MCA driver a chance to log the errors in NVRAM</p>
<p class=MsoNormal style='margin-left:.25in;text-indent:-.25in;mso-text-indent-alt:-.25in;mso-list:l0 level1 lfo1;mso-list-change:\F0B7 "Danny Smith" 20010502T0820'><![if !supportLists]><spanstyle='font-family:Symbol;mso-fareast-font-family:Symbol;mso-bidi-font-family:Symbol'><span style='mso-list:Ignore'>�<span style='font:7.0pt "Times New Roman"'> </span></span></span><![endif]>call KeBugCheckEx() with the following 4parameters to halt the system</p>
<p class=MsoNormal style='margin-left:.75in;text-indent:-.75in;mso-text-indent-alt:-.25in;mso-list:l9 level1 lfo6;mso-list-change:"%1\:1\:0\:\." "Danny Smith" 20010502T0820'><![if !supportLists]><spanstyle='mso-list:Ignore'>1.<span style='font:7.0pt "Times New Roman"'> </span></span><![endif]>MCA Bank number that generated Machine Check exception<o:p></o:p></p>
<p class=MsoNormal style='margin-left:.75in;text-indent:-.75in;mso-text-indent-alt:-.25in;mso-list:l9 level1 lfo7;mso-list-change:"%1\:2\:0\:\." "Danny Smith" 20010502T0820'><![if !supportLists]><spanstyle='mso-list:Ignore'>2.<span style='font:7.0pt "Times New Roman"'> </span></span><![endif]>Address field from <span class=SpellE>MCi_ADDR</span>MSR for this MCA bank<o:p></o:p></p>
<p class=MsoNormal style='margin-left:.75in;text-indent:-.75in;mso-text-indent-alt:-.25in;mso-list:l9 level1 lfo8;mso-list-change:"%1\:3\:0\:\." "Danny Smith" 20010502T0820'><![if !supportLists]><spanstyle='mso-list:Ignore'>3.<span style='font:7.0pt "Times New Roman"'> </span></span><![endif]>High 32 bits of <span class=SpellE>MCi_STATUS</span>MSR for this MCA bank<o:p></o:p></p>
<p class=MsoNormal style='margin-left:.75in;text-indent:-.75in;mso-text-indent-alt:-.25in;mso-list:l9 level1 lfo9;mso-list-change:"%1\:4\:0\:\." "Danny Smith" 20010502T0820'><![if !supportLists]><spanstyle='mso-list:Ignore'>4.<span style='font:7.0pt "Times New Roman"'> </span></span><![endif]>Low 32 bits of <span class=SpellE>MCi_STATUS</span> MSRfor this MCA bank<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>If the error is restartable, the exception <spanclass=GramE>handler <span style='mso-spacerun:yes'>�</span>queues</span> a DPCwhich when called <span style='mso-spacerun:yes'>�</span>reports the MCA bankerror to the MCA Driver through the DpcCallback routine.<br style='mso-special-character:line-break'><![if !supportLineBreakNewLine]><br style='mso-special-character:line-break'><![endif]><o:p></o:p></p>
<p class=SectionHeading>3. Intel Itanium� Processor Machine Check<o:p></o:p></p>
<p class=MsoNormal>Machines checks, including Machine Check Aborts cause IA64 processorexecution to vector to the Processor Abstraction Layer (PAL) PALE_CHECK code inthe IA64 ISA. When PALE_CHECK has finished processing, it passes control to theSystem Abstraction Layer (SAL) SAL_ENTRY code in the IA64 ISA, which in turnbranches to the SAL MCA handler: SAL_CHECK. <o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>Uncorrected machine checks refer to errors that cannot becorrected at PAL or SAL layers. These may still be fully or partiallyrecoverable at the OS layer. <span style='mso-spacerun:yes'>�</span>At thattime, the control flow differs between corrected and uncorrected machinechecks. <o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>For corrected machine checks, the OS corrected errorinterrupt handlers will be invoked some time after returning to the interruptedprocess. <o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>For uncorrected machine checks, SAL exposes an interface toregister an OS_MCA callback. After validating this entry point, SAL_CHECK branchesto it and provides an Error Record that will allow the OS to recover wheneverpossible. The Error Record passed by SAL must comply, at a minimum, with theV3.0 SAL specification (January 2001), Appendix B, �Error Record Structures�.The HAL exposes interfaces for the OEMs to register a driver, and provides theError Record to the driver. This enables the OEMs to assist the generic HAL MCAhandler by attempting recovery of platform specific errors and maintaining the integrityof the platform. <o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>For IA64 PAL, SAL and OS MCA handler�s details, please referto<o:p></o:p></p>
<p class=MsoNormal style='margin-left:1.0in;text-indent:-1.0in;mso-text-indent-alt:-.25in;mso-list:l7 level1 lfo17;mso-list-change:\F0B7 "Danny Smith" 20010502T0820;tab-stops:list 1.0in'><![if !supportLists]><span style='font-family:Symbol;mso-fareast-font-family:Symbol;mso-bidi-font-family:Symbol'><spanstyle='mso-list:Ignore'>�<span style='font:7.0pt "Times New Roman"'> </span></span></span><![endif]><span style='mso-spacerun:yes'>�</span><ahref="http://www.intel.com/design/ia-64/manuals">http://www.intel.com/design/ia-64/manuals</a>.<o:p></o:p></p>
<p class=MsoNormal><span style='mso-tab-count:1'>��������������� </span><o:p></o:p></p>
<p class=MsoNormal>The IA64 Reference HAL provides an MCA specific interfacethat can be used by drivers to:<o:p></o:p></p>
<p class=t><o:p> </o:p></p>
<p class=MsoNormal style='margin-left:.25in;text-indent:-.25in;mso-text-indent-alt:-.25in;mso-list:l0 level1 lfo1;mso-list-change:\F0B7 "Danny Smith" 20010502T0820'><![if !supportLists]><spanstyle='font-family:Symbol;mso-fareast-font-family:Symbol;mso-bidi-font-family:Symbol'><span style='mso-list:Ignore'>�<span style='font:7.0pt "Times New Roman"'> </span></span></span><![endif]>Register for delivery of an <span class=SpellE>ExceptionCallback</span>during non-corrected error processing. This callback returns an error severityvalue to the standard HAL OS_MCA, allowing OEM error recovery. The driver alsoregisters a <span class=SpellE>DpcCallback</span>, which will be performed shouldthe driver recover during <span class=SpellE>ExceptionCallback</span>processing.<o:p></o:p></p>
<p class=MsoNormal style='margin-left:.25in;text-indent:-.25in;mso-text-indent-alt:-.25in;mso-list:l0 level1 lfo1;mso-list-change:\F0B7 "Danny Smith" 20010502T0820'><![if !supportLists]><spanstyle='font-family:Symbol;mso-fareast-font-family:Symbol;mso-bidi-font-family:Symbol'><span style='mso-list:Ignore'>�<span style='font:7.0pt "Times New Roman"'> </span></span></span><![endif]>Register for delivery of two additional <spanclass=SpellE>DpcCallback</span>. These are delivered during corrected errorprocessing for CPU Corrected errors and/or Platform corrected errors.<o:p></o:p></p>
<p class=MsoNormal style='margin-left:.25in;text-indent:-.25in;mso-text-indent-alt:-.25in;mso-list:l0 level1 lfo1;mso-list-change:\F0B7 "Danny Smith" 20010502T0820'><![if !supportLists]><spanstyle='font-family:Symbol;mso-fareast-font-family:Symbol;mso-bidi-font-family:Symbol'><span style='mso-list:Ignore'>�<span style='font:7.0pt "Times New Roman"'> </span></span></span><![endif]>Read the Error Records during <spanclass=SpellE>DpcCallback</span> processing.<o:p></o:p></p>
<p class=MsoNormal><i><u><span style='color:blue'><o:p><span style='text-decoration: none'> </span></o:p></span></u></i></p>
<b style='mso-bidi-font-weight:normal'><span style='font-size:14.0pt;mso-bidi-font-size:10.0pt;font-family:Arial;mso-fareast-font-family:"Times New Roman";mso-bidi-font-family:"Times New Roman";mso-font-kerning:14.0pt;mso-ansi-language:EN-US;mso-fareast-language:EN-US;mso-bidi-language:AR-SA'><br clear=allstyle='page-break-before:always'></span></b>
<p class=SectionHeading style='margin-left:0in;text-indent:0in'>3.1<spanstyle='mso-tab-count:1'>��� </span>Machine Check Exception Handling<o:p></o:p></p>
<p class=MsoNormal>After collecting the MCA log, the standard HAL MCA handler callsthe MCA driver <span class=SpellE>ExceptionCallback</span> function providingthe MCA record. This allows the MCA driver to process the log and makesappropriate consideration with regards to the stability of the system. Thiscallback function returns an error severity value to let the HAL know if itshould consider the event as fatal, recoverable or corrected by the MCA driver.<span class=GramE>In case of a corrected event and if registered, the MCAdriver <span class=SpellE>DpcCallback</span> is then called for asynchronouslog collection by the driver.</span><o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>In case of an OS_MCA uncorrected event, the HAL calls <spanclass=SpellE><span class=GramE>KeBugCheckEx</span></span><span class=GramE>(</span>) with the <span class=SpellE>bugcheck</span> code MACHINE_CHECK_EXCEPTION andthe following 4 parameters to halt the system<o:p></o:p></p>
<p class=MsoNormal style='margin-left:.75in;text-indent:-.75in;mso-text-indent-alt:-.25in;mso-list:l10 level1 lfo18;mso-list-change:"%1\:1\:0\:\." "Danny Smith" 20010502T0820;tab-stops:list .75in'><![if !supportLists]><span style='mso-list:Ignore'>1.<spanstyle='font:7.0pt "Times New Roman"'> </span></span><![endif]>HAL IA64 MCA type, which values could be: <o:p></o:p></p>
<p class=MsoNormal style='margin-left:1.25in;text-indent:-1.25in;mso-text-indent-alt:-.25in;mso-list:l10 level2 lfo18;mso-list-change:"%2\:1\:4\:\." "Danny Smith" 20010502T0820;tab-stops:list 1.25in'><![if !supportLists]><span style='mso-list:Ignore'>a.<spanstyle='font:7.0pt "Times New Roman"'> </span></span><![endif]>HAL_BUGCHECK_MCA_ASSERT = 1,<o:p></o:p></p>
<p class=MsoNormal style='margin-left:1.25in;text-indent:-1.25in;mso-text-indent-alt:-.25in;mso-list:l10 level2 lfo18;mso-list-change:"%2\:2\:4\:\." "Danny Smith" 20010502T0820;tab-stops:list 1.25in'><![if !supportLists]><span style='mso-list:Ignore'>b.<spanstyle='font:7.0pt "Times New Roman"'> </span></span><![endif]>HAL_BUGCHECK_MCA_GET_STATEINFO<spanstyle='mso-spacerun:yes'>� </span>= 2,<o:p></o:p></p>
<p class=MsoNormal style='margin-left:1.25in;text-indent:-1.25in;mso-text-indent-alt:-.25in;mso-list:l10 level2 lfo18;mso-list-change:"%2\:3\:4\:\." "Danny Smith" 20010502T0820;tab-stops:list 1.25in'><![if !supportLists]><span style='mso-list:Ignore'>c.<spanstyle='font:7.0pt "Times New Roman"'> </span></span><![endif]>HAL_BUGCHECK_MCA_CLEAR_STATEINFO = 3,<o:p></o:p></p>
<p class=MsoNormal style='margin-left:1.25in;text-indent:-1.25in;mso-text-indent-alt:-.25in;mso-list:l10 level2 lfo18;mso-list-change:"%2\:4\:4\:\." "Danny Smith" 20010502T0820;tab-stops:list 1.25in'><![if !supportLists]><span style='mso-list:Ignore'>d.<spanstyle='font:7.0pt "Times New Roman"'> </span></span><![endif]>HAL_BUGCHECK_MCA_FATAL= 4. <o:p></o:p></p>
<p class=MsoBodyTextIndent2>This last value should be the expected one for theMCA driver, the other values being HAL internal error values.<o:p></o:p></p>
<p class=MsoNormal style='margin-left:.75in;text-indent:-.75in;mso-text-indent-alt:-.25in;mso-list:l10 level1 lfo18;mso-list-change:"%1\:2\:0\:\." "Danny Smith" 20010502T0820;tab-stops:list .75in'><![if !supportLists]><span style='mso-list:Ignore'>2.<spanstyle='font:7.0pt "Times New Roman"'> </span></span><![endif]>MCA log address<o:p></o:p></p>
<p class=MsoNormal style='margin-left:.75in;text-indent:-.75in;mso-text-indent-alt:-.25in;mso-list:l10 level1 lfo18;mso-list-change:"%1\:3\:0\:\." "Danny Smith" 20010502T0820;tab-stops:list .75in'><![if !supportLists]><span style='mso-list:Ignore'>3.<spanstyle='font:7.0pt "Times New Roman"'> </span></span><![endif]>MCA maximum log size<o:p></o:p></p>
<p class=MsoNormal style='margin-left:.75in;text-indent:-.75in;mso-text-indent-alt:-.25in;mso-list:l10 level1 lfo18;mso-list-change:"%1\:4\:0\:\." "Danny Smith" 20010502T0820;tab-stops:list .75in'><![if !supportLists]><span style='mso-list:Ignore'>4.<spanstyle='font:7.0pt "Times New Roman"'> </span></span><![endif]>SAL status of the last SAL interface.<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=SectionHeading>4.<span style='mso-tab-count:1'>� </span>MCA INTERFACEFOR DRIVERS</p>
<p class=MsoNormal>The Intel generic <span class=SpellE>HALs</span> <spanclass=GramE>provide</span> the following Intel Pentium� Pro and Itaniumtechnology MCA specific interface for drivers:</p>
<p class=Bulletlist style='text-indent:-.25in;mso-text-indent-alt:-.25in;mso-list:l0 level1 lfo1;mso-list-change:\F0B7 "Danny Smith" 20010502T0820'><![if !supportLists]><spanstyle='font-family:Symbol;mso-fareast-font-family:Symbol;mso-bidi-font-family:Symbol'><span style='mso-list:Ignore'>�<span style='font:7.0pt "Times New Roman"'> </span></span></span><![endif]>HalSetSystemInformation with the HAL_QUERY_INFORMATION_CLASSparameter set <span class=GramE>to <spanstyle='mso-spacerun:yes'>�</span>HalMcaRegisterDriver</span>. This allows adriver to register MCA callbacks with the HAL. Additionally the Itanium drivermay use a HAL_QUERY_INFORMATION_CLASS parameter set to <span class=SpellE>HalCmcRegisterDriver</span>or <span class=SpellE>HalCpeRegisterDriver</span> for delivery of Corrected CPUerrors (CMC) and Corrected Platform Errors (CPE).</p>
<p class=Bulletlist style='text-indent:-.25in;mso-text-indent-alt:-.25in;mso-list:l0 level1 lfo1;mso-list-change:\F0B7 "Danny Smith" 20010502T0820'><![if !supportLists]><spanstyle='font-family:Symbol;mso-fareast-font-family:Symbol;mso-bidi-font-family:Symbol'><span style='mso-list:Ignore'>�<span style='font:7.0pt "Times New Roman"'> </span></span></span><![endif]><span class=SpellE>HalQuerySystemInformation</span>with the HAL_QUERY_INFORMATION_CLASS parameter set to HalMcaLogInformation. Thisallows a driver to read the MCA log. Additionally the Itanium driver may use aHAL_QUERY_INFORMATION_CLASS parameter set to <span class=SpellE>HalCmcLogInformation</span>or <span class=SpellE>HalCpeLogInformation</span> to read MCA logs fromCorrected CPU errors (CMC) and/or Corrected Platform Errors (CPE).</p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=SectionHeading>4.1<span style='mso-tab-count:1'>��� </span><spanclass=SpellE>HalSetSystemInformation</span> <span style='font-weight:normal'>toregister MCA Driver</span></p>
<p class=MsoNormal><b style='mso-bidi-font-weight:normal'>NTSTATUS</b> </p>
<p class=MsoNormal><span class=GramE><b style='mso-bidi-font-weight:normal'>HalSetSystemInformation(</b></span></p>
<p class=MsoNormal><span style='mso-tab-count:2'>������������������������������� </span><bstyle='mso-bidi-font-weight:normal'>IN HAL_QUERY_INFORMATION_CLASS<spanstyle='mso-tab-count:1'> </span></b>InformationClass,</p>
<p class=MsoNormal><span style='mso-tab-count:2'>������������������������������� </span><bstyle='mso-bidi-font-weight:normal'>IN <span class=GramE>ULONG<spanstyle='font-weight:normal'><span style='mso-spacerun:yes'>� </span>BufferSize</span></span></b>,</p>
<p class=MsoNormal><span style='mso-tab-count:1'>��������������� </span><spanstyle='mso-tab-count:1'>��������������� </span><b style='mso-bidi-font-weight:normal'>OUT <span class=GramE>PVOID<span style='font-weight:normal'><spanstyle='mso-spacerun:yes'>� </span>Buffer</span></span></b>,</p>
<p class=MsoNormal><span style='mso-tab-count:1'>��������������� </span>);</p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal><b style='mso-bidi-font-weight:normal'>HalSetSystemInformation</b>can be used to register MCA driver with the HAL</p>
<b style='mso-bidi-font-weight:normal'><span style='font-size:10.0pt;font-family:"Times New Roman";mso-fareast-font-family:"Times New Roman";mso-ansi-language:EN-US;mso-fareast-language:EN-US;mso-bidi-language:AR-SA'><brclear=all style='page-break-before:always'></span></b>
<p class=IAHeaders>Parameters<i style='mso-bidi-font-style:normal'><o:p></o:p></i></p>
<p class=da><span class=SpellE><span class=GramE><b style='mso-bidi-font-weight:normal'>InformationClass</b></span></span><span class=GramE><bstyle='mso-bidi-font-weight:normal'> :</b></span><b style='mso-bidi-font-weight:normal'> </b>Specify<i style='mso-bidi-font-style:normal'> </i><bstyle='mso-bidi-font-weight:normal'>HalMcaRegisterDriver </b>to register MCAdriver�s callback routines with the HAL. There are two callback routines-ExceptionCallback and <span class=SpellE>DpcCallback</span>. The <spanclass=SpellE>ExceptionCallback</span> Routine is called during the MachineCheck Exception handler non-<span class=SpellE>restartable</span> error <spanclass=GramE>processing ,</span> before it <span class=SpellE>bugchecks</span>the system. The DpcCallback routine is called when the MCA error is restartable.For Itanium systems, specify <span class=SpellE><b style='mso-bidi-font-weight:normal'>HalCmcRegisterDriver</b></span><b style='mso-bidi-font-weight:normal'> </b>toregister a driver�s Corrected CPU Error <span class=SpellE>DpcCallback</span>routine, and <span class=SpellE><b style='mso-bidi-font-weight:normal'>HalCpeRegisterDriver</b></span><bstyle='mso-bidi-font-weight:normal'> </b>to register a driver�s CorrectedPlatform Error <span class=SpellE>DpcCallback</span>. </p>
<p class=da><span class=SpellE><span class=GramE><b style='mso-bidi-font-weight:normal'>BufferSize</b></span></span><span class=GramE> :</span> Specifies thesize in bytes of the buffer supplied by the caller.</p>
<p class=da><span class=GramE><b style='mso-bidi-font-weight:normal'>Buffer :</b></span><bstyle='mso-bidi-font-weight:normal'> </b>Pointer to a caller-supplied buffer oftype <i style='mso-bidi-font-style:normal'>MCA_DRIVER_INFO</i></p>
<p class=da><i style='mso-bidi-font-style:normal'>//<o:p></o:p></i></p>
<p class=da><i style='mso-bidi-font-style:normal'>// Structure to record thecallbacks from driver<o:p></o:p></i></p>
<p class=da><i style='mso-bidi-font-style:normal'>//<o:p></o:p></i></p>
<p class=da><span class=GramE><i style='mso-bidi-font-style:normal'>typedef</i></span><istyle='mso-bidi-font-style:normal'> struct _MCA_DRIVER_INFO {<o:p></o:p></i></p>
<p class=da><i style='mso-bidi-font-style:normal'><spanstyle='mso-spacerun:yes'>��� </span>PDRIVER_EXCPTN_CALLBACK <span class=SpellE>ExceptionCallback</span><spanclass=GramE>;<span style='mso-spacerun:yes'>� </span>-</span> <spanstyle='mso-spacerun:yes'>�</span></i><i style='mso-bidi-font-style:normal'><spanstyle='font-size:8.0pt;mso-bidi-font-size:10.0pt'>NULL for Itanium correctederror registration<o:p></o:p></span></i></p>
<p class=da><i style='mso-bidi-font-style:normal'><spanstyle='mso-spacerun:yes'>��� </span>PKDEFERRED_ROUTINE<spanstyle='mso-spacerun:yes'>����� </span>DpcCallback;<o:p></o:p></i></p>
<p class=da><i style='mso-bidi-font-style:normal'><spanstyle='mso-spacerun:yes'>��� </span>PVOID<spanstyle='mso-spacerun:yes'>������������������ </span>DeviceContext;<o:p></o:p></i></p>
<p class=da><i style='mso-bidi-font-style:normal'>} MCA_DRIVER_INFO, *PMCA_DRIVER_INFO;<o:p></o:p></i></p>
<p class=da><b style='mso-bidi-font-weight:normal'><o:p> </o:p></b></p>
<p class=da><b style='mso-bidi-font-weight:normal'>ExceptionCallback </b>is thedriver-supplied routine to be called when Machine Check Exception occurs fornon-restartable errors. <i style='mso-bidi-font-style:normal'>A driverexplicitly may not utilize any kernel services or <span class=SpellE>spinlock</span>routines.<span style='mso-spacerun:yes'>� </span>The handler is restricted tothe same constraints as a driver operating at highest IRQL.</i></p>
<p class=da><b style='mso-bidi-font-weight:normal'>DpcCallback </b>is a driver-suppliedroutine that is called for restartable errors that caused Machine CheckException. This routine will be called at DISPATCH_LEVEL.<o:p></o:p></p>
<p class=da><span class=SpellE><b style='mso-bidi-font-weight:normal'>DeviceContext</b></span>is the Device specific context for this MCA Driver.<o:p></o:p></p>
<p class=da style='margin-left:0in;text-indent:0in'><b style='mso-bidi-font-weight:normal'><o:p> </o:p></b></p>
<p class=IAHeaders>Include<i style='mso-bidi-font-style:normal'><o:p></o:p></i></p>
<p class=da style='margin-left:0in;text-indent:0in'><span class=SpellE>ntddk.h</span></p>
<p class=IAHeaders>Return Value</p>
<p class=MsoNormal><b style='mso-bidi-font-weight:normal'>HalSetSystemInformation</b>returns STATUS_SUCCESS if the registration is successful.</p>
<p class=IAHeaders>Comments</p>
<p class=MsoNormal><b style='mso-bidi-font-weight:normal'>HalSetSystemInformation</b>must be called before a MCA driver can use any of the other interface routines.Only one MCA driver can be registered with the HAL at any time.<bstyle='mso-bidi-font-weight:normal'><o:p></o:p></b></p>
<p class=MsoNormal><b style='mso-bidi-font-weight:normal'><o:p> </o:p></b></p>
<p class=SectionHeading>4.2<span style='mso-tab-count:1'>��� </span><spanclass=SpellE>HalQuerySystemInformation</span> <span style='font-weight:normal'>toget MCA logs</span></p>
<p class=MsoNormal><b style='mso-bidi-font-weight:normal'>NTSTATUS</b> </p>
<p class=MsoNormal><span class=GramE><b style='mso-bidi-font-weight:normal'>HalQuerySystemInformation(</b></span></p>
<p class=MsoNormal><span style='mso-tab-count:2'>������������������������������� </span><bstyle='mso-bidi-font-weight:normal'>IN HAL_QUERY_INFORMATION_CLASS<spanstyle='mso-tab-count:1'> </span></b>InformationClass,</p>
<p class=MsoNormal><span style='mso-tab-count:2'>������������������������������� </span><bstyle='mso-bidi-font-weight:normal'>IN <span class=GramE>ULONG<spanstyle='font-weight:normal'><span style='mso-spacerun:yes'>� </span>BufferSize</span></span></b>,</p>
<p class=MsoNormal><span style='mso-tab-count:2'>������������������������������� </span><bstyle='mso-bidi-font-weight:normal'>OUT <span class=GramE>PVOID<spanstyle='font-weight:normal'><span style='mso-spacerun:yes'>� </span>Buffer</span></span></b>,</p>
<p class=MsoNormal><span style='mso-tab-count:2'>������������������������������� </span><bstyle='mso-bidi-font-weight:normal'>OUT <span class=GramE>PULONG<spanstyle='font-weight:normal'><span style='mso-spacerun:yes'>�</span>ReturnedLength</span></span></b></p>
<p class=MsoNormal><span style='mso-tab-count:1'>��������������� </span>);</p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal><b style='mso-bidi-font-weight:normal'>HalQuerySystemInformation</b>can be used to read MCA banks status registers</p>
<b style='mso-bidi-font-weight:normal'><span style='font-size:10.0pt;font-family:"Times New Roman";mso-fareast-font-family:"Times New Roman";mso-ansi-language:EN-US;mso-fareast-language:EN-US;mso-bidi-language:AR-SA'><brclear=all style='page-break-before:always'></span></b>
<p class=IAHeaders>Parameters<i style='mso-bidi-font-style:normal'><o:p></o:p></i></p>
<p class=da><span class=SpellE><span class=GramE><b style='mso-bidi-font-weight:normal'>InformationClass</b></span></span><span class=GramE><bstyle='mso-bidi-font-weight:normal'> :</b></span><b style='mso-bidi-font-weight:normal'> </b>Specify<i style='mso-bidi-font-style:normal'> </i><bstyle='mso-bidi-font-weight:normal'>HalMcaLogInformation </b>to read thecurrent MCA error log<b style='mso-bidi-font-weight:normal'>.<spanstyle='mso-spacerun:yes'>� </span></b>If any uncorrected Machine Check error isfound, it is returned in the buffer. For Itanium systems, specify<istyle='mso-bidi-font-style:normal'> </i><span class=SpellE><b style='mso-bidi-font-weight:normal'>HalCmcLogInformation</b></span><b style='mso-bidi-font-weight:normal'> </b>toread the current Corrected CPU Error Log and <span class=SpellE><bstyle='mso-bidi-font-weight:normal'>HalCpeLogInformation</b></span><bstyle='mso-bidi-font-weight:normal'> </b>to read the current Corrected PlatformError Log</p>
<p class=MsoNormal><i style='mso-bidi-font-style:normal'><o:p> </o:p></i></p>
<p class=da><span class=SpellE><span class=GramE><b style='mso-bidi-font-weight:normal'>BufferSize</b></span></span><span class=GramE> :</span> Specifies thesize in bytes of the buffer supplied by the caller.</p>
<p class=da><span class=GramE><b style='mso-bidi-font-weight:normal'>Buffer :</b></span><bstyle='mso-bidi-font-weight:normal'> </b>Points to a caller-supplied buffer oftype MCA_EXCEPTION that will contain the information returned by this routine.For Itanium, the returned information will be compliant, at a minimum, with theV3.0 SAL specification (January 2001), Appendix B, �Error Record Structures�.For Pentium Pro, the information is as described below.</p>
<p class=da><i style='mso-bidi-font-style:normal'><o:p> </o:p></i></p>
<p class=da><span class=SpellE><span class=GramE><i style='mso-bidi-font-style:normal'>typedef</i></span></span><i style='mso-bidi-font-style:normal'> union_MCI_STATS {<o:p></o:p></i></p>
<p class=da><i style='mso-bidi-font-style:normal'><span style='mso-tab-count:1'>����� </span><span class=SpellE><span class=GramE>struct</span></span> {<o:p></o:p></i></p>
<p class=da><i style='mso-bidi-font-style:normal'><span style='mso-tab-count:1'>����� </span><span style='mso-spacerun:yes'>��� </span>USHORT<spanstyle='mso-tab-count:1'>�������������� </span>McaCod;<o:p></o:p></i></p>
<p class=da><i style='mso-bidi-font-style:normal'><span style='mso-tab-count:1'>����� </span><span style='mso-spacerun:yes'>��� </span>USHORT<spanstyle='mso-tab-count:1'>�������������� </span>MsCod;<o:p></o:p></i></p>
<p class=da><i style='mso-bidi-font-style:normal'><span style='mso-tab-count:1'>����� </span><span style='mso-spacerun:yes'>��� </span>ULONG<spanstyle='mso-tab-count:1'> </span>OtherInfo <span style='mso-tab-count:1'>������������� </span>:25;<o:p></o:p></i></p>
<p class=da><i style='mso-bidi-font-style:normal'><span style='mso-tab-count:1'>����� </span><span style='mso-spacerun:yes'>��� </span>ULONG<spanstyle='mso-tab-count:1'> </span>Damage<span style='mso-tab-count:2'>���������������� </span>:1;<o:p></o:p></i></p>
<p class=da><i style='mso-bidi-font-style:normal'><span style='mso-tab-count:1'>����� </span><span style='mso-spacerun:yes'>��� </span>ULONG<spanstyle='mso-tab-count:1'> </span>AddressValid<span style='mso-tab-count:1'>������� </span>:1;<o:p></o:p></i></p>
<p class=da><i style='mso-bidi-font-style:normal'><span style='mso-tab-count:1'>����� </span><span style='mso-spacerun:yes'>��� </span>ULONG<spanstyle='mso-tab-count:1'> </span>MiscValid<span style='mso-tab-count:1'>������������ </span>:1;<o:p></o:p></i></p>
<p class=da><i style='mso-bidi-font-style:normal'><span style='mso-tab-count:1'>����� </span><span style='mso-spacerun:yes'>��� </span>ULONG<spanstyle='mso-tab-count:1'> </span>Enabled<span style='mso-tab-count:2'>���������������� </span>:1;<o:p></o:p></i></p>
<p class=da><i style='mso-bidi-font-style:normal'><span style='mso-tab-count:1'>����� </span><span style='mso-spacerun:yes'>��� </span>ULONG<spanstyle='mso-tab-count:1'> </span>UnCorrected<span style='mso-tab-count:1'>������� </span>:1;<o:p></o:p></i></p>
<p class=da><i style='mso-bidi-font-style:normal'><span style='mso-tab-count:1'>����� </span><span style='mso-spacerun:yes'>��� </span>ULONG<spanstyle='mso-tab-count:1'> </span>OverFlow<span style='mso-tab-count:1'>������������� </span>:1;<o:p></o:p></i></p>
<p class=da><i style='mso-bidi-font-style:normal'><span style='mso-tab-count:1'>����� </span><span style='mso-spacerun:yes'>��� </span>ULONG<spanstyle='mso-tab-count:1'> </span>Valid<span style='mso-tab-count:2'>��������������������� </span>:1;<o:p></o:p></i></p>
<p class=da><i style='mso-bidi-font-style:normal'><span style='mso-tab-count:1'>����� </span>} MciStats;<o:p></o:p></i></p>
<p class=da><i style='mso-bidi-font-style:normal'><o:p> </o:p></i></p>
<p class=da><i style='mso-bidi-font-style:normal'><span style='mso-tab-count:1'>����� </span>ULONGLONG<span style='mso-tab-count:1'>��������� </span>QuadPart;<o:p></o:p></i></p>
<p class=da><i style='mso-bidi-font-style:normal'>} MCI_STATS, *PMCI_STATS;<o:p></o:p></i></p>
<p class=da><i style='mso-bidi-font-style:normal'><spanstyle='mso-spacerun:yes'>�</span><o:p></o:p></i></p>
<p class=da><span class=GramE><i style='mso-bidi-font-style:normal'>typedef</i></span><istyle='mso-bidi-font-style:normal'> union _MCI_ADDR{<o:p></o:p></i></p>
<p class=da><i style='mso-bidi-font-style:normal'><span style='mso-tab-count:1'>����� </span><span class=GramE>struct</span> {<o:p></o:p></i></p>
<p class=da><i style='mso-bidi-font-style:normal'><span style='mso-tab-count:2'>��������� </span>ULONG Address;<o:p></o:p></i></p>
<p class=da><i style='mso-bidi-font-style:normal'><span style='mso-tab-count:2'>��������� </span>ULONG Reserved;<o:p></o:p></i></p>
<p class=da><i style='mso-bidi-font-style:normal'><span style='mso-tab-count:1'>����� </span>} MciAddr;<o:p></o:p></i></p>
<p class=da><i style='mso-bidi-font-style:normal'><span style='mso-tab-count:1'>����� </span><o:p></o:p></i></p>
<p class=da><i style='mso-bidi-font-style:normal'><span style='mso-tab-count:1'>����� </span>ULONGLONG<span style='mso-tab-count:1'>��������� </span>QuadPart;<o:p></o:p></i></p>
<p class=da><i style='mso-bidi-font-style:normal'>} MCI_ADDR, *PMCI_ADDR;<o:p></o:p></i></p>
<i style='mso-bidi-font-style:normal'><span style='font-size:10.0pt;font-family:"Times New Roman";mso-fareast-font-family:"Times New Roman";mso-ansi-language:EN-US;mso-fareast-language:EN-US;mso-bidi-language:AR-SA'><br clear=allstyle='mso-special-character:line-break;page-break-before:always'></span></i>
<p class=da><i style='mso-bidi-font-style:normal'><o:p> </o:p></i></p>
<p class=da><i style='mso-bidi-font-style:normal'><spanstyle='mso-spacerun:yes'>�</span><o:p></o:p></i></p>
<p class=da><span class=SpellE><span class=GramE><i style='mso-bidi-font-style:normal'>typedef</i></span></span><i style='mso-bidi-font-style:normal'> <spanclass=SpellE>struct</span> _MCA_EXCEPTION {<o:p></o:p></i></p>
<p class=da><i style='mso-bidi-font-style:normal'><span style='mso-tab-count:1'>����� </span><o:p></o:p></i></p>
<p class=da><i style='mso-bidi-font-style:normal'><span style='mso-tab-count:1'>����� </span>ULONG<span style='mso-tab-count:4'>���������������������������������������������������� </span>VersionNumber;<spanstyle='mso-tab-count:1'>� </span>// Version number of this record type<o:p></o:p></i></p>
<p class=da><i style='mso-bidi-font-style:normal'><span style='mso-tab-count:1'>����� </span>MCA_EXCEPTION_TYPE<span style='mso-tab-count:2'>������������������� </span>ExceptionType;<spanstyle='mso-tab-count:1'>��� </span>// MCA or MCE<o:p></o:p></i></p>
<p class=da><i style='mso-bidi-font-style:normal'><span style='mso-tab-count:1'>����� </span>LARGE_INTEGER <span style='mso-tab-count:2'>���������������� </span>TimeStamp;<spanstyle='mso-tab-count:1'>���������� </span>// exception recording timestamp<o:p></o:p></i></p>
<p class=da><i style='mso-bidi-font-style:normal'><span style='mso-tab-count:1'>����� </span>ULONG<span style='mso-tab-count:4'>���������������������������������������������������� </span>ProcessorNumber<spanclass=GramE>;/</span>/ processor number<o:p></o:p></i></p>
<p class=da><i style='mso-bidi-font-style:normal'><span style='mso-tab-count:2'>��������� </span><span style='mso-spacerun:yes'>�</span><o:p></o:p></i></p>
<p class=da><i style='mso-bidi-font-style:normal'><span style='mso-tab-count:1'>����� </span><span class=GramE>union</span> {<o:p></o:p></i></p>
<p class=da><i style='mso-bidi-font-style:normal'><span style='mso-tab-count:2'>��������� </span><span class=GramE>struct</span> {<o:p></o:p></i></p>
<p class=da><i style='mso-bidi-font-style:normal'><span style='mso-tab-count:3'>������������������������� </span>UCHAR<span style='mso-tab-count:3'>��������������������������������� </span>BankNumber;<spanstyle='mso-tab-count:2'>���������������������� </span>// bank number<o:p></o:p></i></p>
<p class=da><i style='mso-bidi-font-style:normal'><span style='mso-tab-count:3'>������������������������� </span>MCI_STATS<span style='mso-tab-count:2'>������������������������� </span>Status;<spanstyle='mso-spacerun:yes'>���� </span><o:p></o:p></i></p>
<p class=da><i style='mso-bidi-font-style:normal'><span style='mso-tab-count:3'>������������������������� </span>MCI_ADDR<span style='mso-tab-count:2'>������������������������� </span>Address;<o:p></o:p></i></p>
<p class=da><i style='mso-bidi-font-style:normal'><span style='mso-tab-count:3'>������������������������� </span>ULONGLONG<span style='mso-tab-count:2'>��������������������� </span>Misc;<o:p></o:p></i></p>
<p class=da><i style='mso-bidi-font-style:normal'><span style='mso-tab-count:2'>��������� </span>} Mca;<o:p></o:p></i></p>
<p class=da><i style='mso-bidi-font-style:normal'><span style='mso-tab-count:2'>��������� </span><o:p></o:p></i></p>
<p class=da><i style='mso-bidi-font-style:normal'><span style='mso-tab-count:2'>��������� </span><span class=GramE>struct</span> {<o:p></o:p></i></p>
<p class=da><i style='mso-bidi-font-style:normal'><span style='mso-tab-count:3'>������������������������� </span>ULONGLONG<span style='mso-tab-count:1'>����� </span>McAddress;<spanstyle='mso-tab-count:1'>���������� </span>// physical address for the cyclecausing the error<o:p></o:p></i></p>
<p class=da><i style='mso-bidi-font-style:normal'><span style='mso-tab-count:3'>������������������������� </span>ULONGLONG<span style='mso-tab-count:1'>����� </span>McType;<span style='mso-tab-count:1'>�������������� </span>// cycle specificationcausing the error<o:p></o:p></i></p>
<p class=da><i style='mso-bidi-font-style:normal'><span style='mso-tab-count:2'>��������� </span>} Mce;<o:p></o:p></i></p>
<p class=da><i style='mso-bidi-font-style:normal'><span style='mso-tab-count:1'>����� </span>} u;<o:p></o:p></i></p>
<p class=da><i style='mso-bidi-font-style:normal'><o:p> </o:p></i></p>
<p class=da><i style='mso-bidi-font-style:normal'>} MCA_EXCEPTION,*PMCA_EXCEPTION;<o:p></o:p></i></p>
<p class=da><i style='mso-bidi-font-style:normal'><o:p> </o:p></i></p>
<p class=da><span class=GramE><b style='mso-bidi-font-weight:normal'>ReturnedLength:</b></span><b style='mso-bidi-font-weight:normal'> </b>Specifies the number ofbytes returned in Buffer.</p>
<p class=IAHeaders>Include<i style='mso-bidi-font-style:normal'><o:p></o:p></i></p>
<p class=da style='margin-left:0in;text-indent:0in'><span class=SpellE>ntddk.h</span><o:p></o:p></p>
<p class=IAHeaders>Return Value</p>
<p class=MsoNormal style='margin-left:.25in;text-indent:-.25in;mso-text-indent-alt:-.25in;mso-list:l0 level1 lfo1;mso-list-change:\F0B7 "Danny Smith" 20010502T0820'><![if !supportLists]><spanstyle='font-family:Symbol;mso-fareast-font-family:Symbol;mso-bidi-font-family:Symbol'><span style='mso-list:Ignore'>�<span style='font:7.0pt "Times New Roman"'> </span></span></span><![endif]><span class=SpellE><b style='mso-bidi-font-weight:normal'>HalQuerySystemInformation</b></span> returns STATUS_SUCCESS if an errorlog exists.</p>
<p class=IAHeaders>Comments</p>
<p class=MsoNormal>This<b style='mso-bidi-font-weight:normal'> </b>functionreturns the first error. It is the MCA driver responsibility to call thisroutine again to see if there are any more errors available</p>
<p class=TYPEWRITER><o:p> </o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
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