Vlv2DeviceRefCodePkg/AcpiTablesPCAT/Lpit/Lpit.aslc

   1 /*++
   2
   3 Copyright (c)  1999  - 2014, Intel Corporation. All rights reserved
   4
   5   This program and the accompanying materials are licensed and made available under
   6   the terms and conditions of the BSD License that accompanies this distribution.
   7   The full text of the license may be found at
   8   http://opensource.org/licenses/bsd-license.php.
   9
  10   THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  11   WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  12
  13
  14
  15 --*/
  16
  17 //
  18 // Include files
  19 //
  20
  21 #include <PiDxe.h>
  22 #include <IndustryStandard/Acpi50.h>
  23
  24
  25
  26 //
  27 // LPIT Definitions
  28 //
  29
  30 #define EFI_ACPI_LOW_POWER_IDLE_TABLE_REVISION 0x1
  31
  32 //
  33 // Ensure proper structure formats
  34 //
  35 #pragma pack(1)
  36
  37 typedef union _EFI_ACPI_LPI_STATE_FLAGS {
  38   struct {
  39     UINT32 Disabled           :1;
  40     UINT32 CounterUnavailable :1;
  41     UINT32 Reserved           :30;
  42   };
  43   UINT32 AsUlong;
  44 } EFI_ACPI_LPI_STATE_FLAGS, *PEFI_ACPI_LPI_STATE_FLAGS;
  45
  46 // Only Mwait LPI here:
  47
  48 typedef struct _EFI_ACPI_MWAIT_LPI_STATE_DESCRIPTOR {
  49   UINT32 Type;        // offset: 0
  50   UINT32 Length;      // offset: 4
  51   UINT16 UniqueId;    // offset: 8
  52   UINT8 Reserved[2];  // offset: 9
  53   EFI_ACPI_LPI_STATE_FLAGS Flags; // offset: 12
  54   EFI_ACPI_2_0_GENERIC_ADDRESS_STRUCTURE EntryTrigger; // offset: 16
  55   UINT32 Residency;   // offset: 28
  56   UINT32 Latency;     // offset: 32
  57   EFI_ACPI_2_0_GENERIC_ADDRESS_STRUCTURE ResidencyCounter; // offset: 36
  58   UINT64 ResidencyCounterFrequency; //offset: 48
  59 } EFI_ACPI_MWAIT_LPI_STATE_DESCRIPTOR;
  60
  61
  62 //
  63 // Defines for LPIT table, some are VLV specific
  64 //
  65
  66
  67 // signature "LPIT"
  68 #define EFI_ACPI_LOW_POWER_IDLE_TABLE_SIGNATURE  0x5449504c
  69
  70 #define EFI_ACPI_OEM_LPIT_REVISION                      0x00000000
  71
  72 #define EFI_ACPI_LOW_POWER_IDLE_MWAIT_TYPE    0x0
  73 #define EFI_ACPI_LOW_POWER_IDLE_DEFAULT_FLAG  0x0
  74 #define EFI_ACPI_LOW_POWER_IDLE_RES_FREQ_8K   0x8000    // 32768
  75
  76 //
  77 // LPI state count (4 on VLV: S0ir, S0i1, S0i2, S0i3)
  78 //
  79
  80 #define EFI_ACPI_VLV_LPI_STATE_COUNT          0x4
  81
  82 //
  83 // LPI TRIGGER (HW C7 on VLV),
  84 // TOFIX!!!
  85 //
  86 #define EFI_ACPI_VLV_LPI_TRIGGER {0x7F,0x1,0x2,0x0,0x64}
  87
  88 //
  89 // LPI residency counter (MMIO)
  90 //
  91 #define  EFI_ACPI_VLV_LPI_RES_COUNTER0   {0x0,32,0x0,0x03,0xFED03080}
  92 #define  EFI_ACPI_VLV_LPI_RES_COUNTER1   {0x0,32,0x0,0x03,0xFED03084}
  93 #define  EFI_ACPI_VLV_LPI_RES_COUNTER2   {0x0,32,0x0,0x03,0xFED03088}
  94 #define  EFI_ACPI_VLV_LPI_RES_COUNTER3   {0x0,32,0x0,0x03,0xFED0308C}
  95
  96 //
  97 // LPI break-even residency in us - all match S0i3 residency
  98 // Residency estimate: Latency x 3
  99 //
 100 #define  EFI_ACPI_VLV_LPI_MIN_RES0   15000
 101 #define  EFI_ACPI_VLV_LPI_MIN_RES1   15000
 102 #define  EFI_ACPI_VLV_LPI_MIN_RES2   15000
 103 #define  EFI_ACPI_VLV_LPI_MIN_RES3   15000
 104
 105 //
 106 // LPI latency in us - all match S0i3 latency
 107 //
 108 #define  EFI_ACPI_VLV_LPI_LATENCY0   5000
 109 #define  EFI_ACPI_VLV_LPI_LATENCY1   5000
 110 #define  EFI_ACPI_VLV_LPI_LATENCY2   5000
 111 #define  EFI_ACPI_VLV_LPI_LATENCY3   5000
 112
 113
 114 //
 115 // LPI ID
 116 //
 117 #define  EFI_ACPI_VLV_LPI_UNIQUE_ID0   0
 118 #define  EFI_ACPI_VLV_LPI_UNIQUE_ID1   1
 119 #define  EFI_ACPI_VLV_LPI_UNIQUE_ID2   2
 120 #define  EFI_ACPI_VLV_LPI_UNIQUE_ID3   3
 121
 122 //
 123 //  LPI ACPI table header
 124 //
 125
 126
 127 typedef struct _EFI_ACPI_LOW_POWER_IDLE_TABLE {
 128   EFI_ACPI_DESCRIPTION_HEADER             Header;
 129   EFI_ACPI_MWAIT_LPI_STATE_DESCRIPTOR     LpiStates[EFI_ACPI_VLV_LPI_STATE_COUNT];
 130 } EFI_ACPI_LOW_POWER_IDLE_TABLE;
 131
 132 #pragma pack()
 133
 134 EFI_ACPI_LOW_POWER_IDLE_TABLE Lpit = {
 135
 136   //
 137   // Header
 138   //
 139
 140
 141   EFI_ACPI_LOW_POWER_IDLE_TABLE_SIGNATURE,
 142   sizeof (EFI_ACPI_LOW_POWER_IDLE_TABLE),
 143   EFI_ACPI_LOW_POWER_IDLE_TABLE_REVISION ,
 144
 145   //
 146   // Checksum will be updated at runtime
 147   //
 148   0x00,
 149
 150   //
 151   // It is expected that these values will be updated at runtime
 152   //
 153   ' ', ' ', ' ', ' ', ' ', ' ',
 154
 155   0,
 156   EFI_ACPI_OEM_LPIT_REVISION,
 157   0,
 158   0,
 159
 160
 161
 162   //
 163   // Descriptor
 164   //
 165   {
 166     {
 167       EFI_ACPI_LOW_POWER_IDLE_MWAIT_TYPE,
 168       sizeof(EFI_ACPI_MWAIT_LPI_STATE_DESCRIPTOR),
 169       EFI_ACPI_VLV_LPI_UNIQUE_ID0,
 170       {0,0},
 171       {EFI_ACPI_LOW_POWER_IDLE_DEFAULT_FLAG},   // Flags
 172       EFI_ACPI_VLV_LPI_TRIGGER,  //EntryTrigger
 173       EFI_ACPI_VLV_LPI_MIN_RES0, //Residency
 174       EFI_ACPI_VLV_LPI_LATENCY0, //Latency
 175       EFI_ACPI_VLV_LPI_RES_COUNTER0, //ResidencyCounter
 176       EFI_ACPI_LOW_POWER_IDLE_RES_FREQ_8K //Residency counter frequency
 177     },
 178     {
 179       EFI_ACPI_LOW_POWER_IDLE_MWAIT_TYPE,
 180       sizeof(EFI_ACPI_MWAIT_LPI_STATE_DESCRIPTOR),
 181       EFI_ACPI_VLV_LPI_UNIQUE_ID1,
 182       {0,0},
 183       {EFI_ACPI_LOW_POWER_IDLE_DEFAULT_FLAG},   // Flags
 184       EFI_ACPI_VLV_LPI_TRIGGER,  //EntryTrigger
 185       EFI_ACPI_VLV_LPI_MIN_RES1, //Residency
 186       EFI_ACPI_VLV_LPI_LATENCY1, //Latency
 187       EFI_ACPI_VLV_LPI_RES_COUNTER1, //ResidencyCounter
 188       EFI_ACPI_LOW_POWER_IDLE_RES_FREQ_8K //Residency counter frequency
 189     },
 190     {
 191       EFI_ACPI_LOW_POWER_IDLE_MWAIT_TYPE,
 192       sizeof(EFI_ACPI_MWAIT_LPI_STATE_DESCRIPTOR),
 193       EFI_ACPI_VLV_LPI_UNIQUE_ID2,
 194       {0,0},
 195       {EFI_ACPI_LOW_POWER_IDLE_DEFAULT_FLAG},   // Flags
 196       EFI_ACPI_VLV_LPI_TRIGGER,  //EntryTrigger
 197       EFI_ACPI_VLV_LPI_MIN_RES2, //Residency
 198       EFI_ACPI_VLV_LPI_LATENCY2, //Latency
 199       EFI_ACPI_VLV_LPI_RES_COUNTER2, //ResidencyCounter
 200       EFI_ACPI_LOW_POWER_IDLE_RES_FREQ_8K //Residency counter frequency
 201     },
 202     {
 203       EFI_ACPI_LOW_POWER_IDLE_MWAIT_TYPE,
 204       sizeof(EFI_ACPI_MWAIT_LPI_STATE_DESCRIPTOR),
 205       EFI_ACPI_VLV_LPI_UNIQUE_ID3,
 206       {0,0},
 207       {EFI_ACPI_LOW_POWER_IDLE_DEFAULT_FLAG},   // Flags
 208       EFI_ACPI_VLV_LPI_TRIGGER,  //EntryTrigger
 209       EFI_ACPI_VLV_LPI_MIN_RES3, //Residency
 210       EFI_ACPI_VLV_LPI_LATENCY3, //Latency
 211       EFI_ACPI_VLV_LPI_RES_COUNTER3, //ResidencyCounter
 212       EFI_ACPI_LOW_POWER_IDLE_RES_FREQ_8K //Residency counter frequency
 213     }
 214   }
 215
 216 };
 217
 218
 219 VOID*
 220 ReferenceAcpiTable (
 221   VOID
 222   )
 223 {
 224   //
 225   // Reference the table being generated to prevent the optimizer from
 226   // removing the data structure from the executable
 227   //
 228   return (VOID*)&Lpit;
 229 }