QuarkPlatformPkg/Acpi/AcpiTables/Cpu0Tst/Cpu0Tst.asl

   1 /** @file
   2 CPU T-state control methods
   3
   4 Copyright (c) 2013-2015 Intel Corporation.
   5
   6 SPDX-License-Identifier: BSD-2-Clause-Patent
   7
   8 **/
   9
  10 DefinitionBlock (
  11     "CPU0TST.aml",
  12     "SSDT",
  13     0x01,
  14     "SsgPmm",
  15     "Cpu0Tst",
  16     0x0013
  17     )
  18 {
  19     External (PDC0, IntObj)
  20     External (CFGD, FieldUnitObj)
  21     External(\_PR.CPU0, DeviceObj)
  22     External(_PSS)
  23
  24     Scope(\_PR.CPU0)
  25     {
  26         Method(_TPC,0)
  27         {
  28             Return(ZERO)   // Return All States Available.
  29         }
  30
  31         Name(TPTC, ResourceTemplate()
  32         {
  33             Memory32Fixed(ReadOnly, 0, 0, FIX1) // IO APIC
  34         })
  35
  36         //
  37         // If OSPM is capable of direct access to on demand throttling MSR,
  38         // we use MSR method;otherwise we use IO method.
  39         //
  40         //
  41         // PDCx[2] = Indicates whether OSPM is capable of direct access to
  42         // on demand throttling MSR.
  43         //
  44         Method(_PTC, 0)
  45         {
  46           If(And(PDC0, 0x0004))
  47           {
  48             Return(Package() // MSR Method
  49             {
  50               ResourceTemplate(){Register(FFixedHW, 0, 0, 0)},
  51               ResourceTemplate(){Register(FFixedHW, 0, 0, 0)}
  52             }
  53             )
  54           }
  55           Return(Package() // IO Method
  56           {
  57             //
  58             // PM IO base ("PMBALVL0" will be updated at runtime)
  59             //
  60             ResourceTemplate(){Register(SystemIO, 4, 1, 0x304C564C41424D50)},
  61             ResourceTemplate(){Register(SystemIO, 4, 1, 0x304C564C41424D50)}
  62           }
  63           )
  64         }
  65
  66         //
  67         // _TSS returned package for IO Method
  68         //
  69         Name(TSSI, Package()
  70         {
  71           Package(){100, 1000, 0, 0x00, 0}
  72         }
  73         )
  74         //
  75         // _TSS returned package for MSR Method
  76         //
  77         Name(TSSM, Package()
  78         {
  79           Package(){100, 1000, 0, 0x00, 0}
  80         }
  81         )
  82
  83         Method(_TSS, 0)
  84         {
  85           //
  86           // If OSPM is capable of direct access to on demand throttling MSR,
  87           // we report TSSM;otherwise report TSSI.
  88           //
  89           If(And(PDC0, 0x0004))
  90           {
  91             Return(TSSM)
  92           }
  93           Return(TSSI)
  94         }
  95
  96         Method(_TSD, 0)
  97         {
  98           //
  99           // If CMP is suppored, we report the dependency with two processors
 100           //
 101           If(LAnd(And(CFGD, 0x1000000), LNot(And(PDC0, 4))))
 102           {
 103             Return(Package()
 104             {
 105               Package()
 106               {
 107                 5,    // # entries.
 108                 0,    // Revision.
 109                 0,    // Domain #.
 110                 0xFD, // Coord Type- SW_ANY
 111                 2     // # processors.
 112               }
 113             }
 114             )
 115           }
 116           //
 117           // Otherwise, we report the dependency with one processor
 118           //
 119           Return(Package()
 120           {
 121             Package()
 122             {
 123               5,        // # entries.
 124               0,        // Revision.
 125               0,        // Domain #.
 126               0xFC,     // Coord Type- SW_ALL
 127               1         // # processors.
 128             }
 129           }
 130           )
 131         }
 132     }
 133 }