DuetPkg/AcpiResetDxe/Reset.c

   1 /*++ @file
   2   Reset Architectural Protocol implementation.
   3
   4 Copyright (c) 2006 - 2010, Intel Corporation
   5 All rights reserved. This program and the accompanying materials
   6 are licensed and made available under the terms and conditions of the BSD License
   7 which accompanies this distribution.  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 #include "Reset.h"
  16
  17 /**
  18   Use ACPI method to reset the sytem. If fail, use legacy 8042 method to reset the system
  19
  20   @param[in] AcpiDescription   Global variable to record reset info
  21
  22 **/
  23 VOID
  24 SystemReset (
  25   IN EFI_ACPI_DESCRIPTION *AcpiDescription
  26   )
  27 {
  28   UINT8   Dev;
  29   UINT8   Func;
  30   UINT8   Register;
  31
  32   if ((AcpiDescription->RESET_REG.Address != 0) &&
  33       ((AcpiDescription->RESET_REG.AddressSpaceId == EFI_ACPI_3_0_SYSTEM_IO) ||
  34        (AcpiDescription->RESET_REG.AddressSpaceId == EFI_ACPI_3_0_SYSTEM_MEMORY) ||
  35        (AcpiDescription->RESET_REG.AddressSpaceId == EFI_ACPI_3_0_PCI_CONFIGURATION_SPACE))) {
  36     //
  37     // Use ACPI System Reset
  38     //
  39     switch (AcpiDescription->RESET_REG.AddressSpaceId) {
  40     case EFI_ACPI_3_0_SYSTEM_IO:
  41       IoWrite8 ((UINTN) AcpiDescription->RESET_REG.Address, AcpiDescription->RESET_VALUE);
  42       break;
  43     case EFI_ACPI_3_0_SYSTEM_MEMORY:
  44       MmioWrite8 ((UINTN) AcpiDescription->RESET_REG.Address, AcpiDescription->RESET_VALUE);
  45       break;
  46     case EFI_ACPI_3_0_PCI_CONFIGURATION_SPACE:
  47       Register = (UINT8) AcpiDescription->RESET_REG.Address;
  48       Func     = (UINT8) (RShiftU64 (AcpiDescription->RESET_REG.Address, 16) & 0x7);
  49       Dev      = (UINT8) (RShiftU64 (AcpiDescription->RESET_REG.Address, 32) & 0x1F);
  50       PciWrite8 (PCI_LIB_ADDRESS (0, Dev, Func, Register), AcpiDescription->RESET_VALUE);
  51       break;
  52     }
  53   }
  54
  55   //
  56   // If system comes here, means ACPI reset fail, do Legacy System Reset, assume 8042 available
  57   //
  58   Register = 0xfe;
  59   IoWrite8 (0x64, Register);
  60
  61   //
  62   // System should reset now
  63   //
  64
  65   return ;
  66 }
  67
  68 /**
  69   Use ACPI method to shutdown the sytem
  70
  71   @param[in] AcpiDescription   Global variable to record reset info
  72
  73   @retval EFI_UNSUPPORTED      Shutdown fails
  74
  75 **/
  76 EFI_STATUS
  77 SystemShutdown (
  78   IN EFI_ACPI_DESCRIPTION *AcpiDescription
  79   )
  80 {
  81   UINT16  Value;
  82
  83   //
  84   // 1. Write SLP_TYPa
  85   //
  86   if ((AcpiDescription->PM1a_CNT_BLK.Address != 0) && (AcpiDescription->SLP_TYPa != 0)) {
  87     switch (AcpiDescription->PM1a_CNT_BLK.AddressSpaceId) {
  88     case EFI_ACPI_3_0_SYSTEM_IO:
  89       Value = IoRead16 ((UINTN) AcpiDescription->PM1a_CNT_BLK.Address);
  90       Value = (Value & 0xc3ff) | 0x2000 | (AcpiDescription->SLP_TYPa << 10);
  91       IoWrite16 ((UINTN) AcpiDescription->PM1a_CNT_BLK.Address, Value);
  92       break;
  93     case EFI_ACPI_3_0_SYSTEM_MEMORY:
  94       Value = MmioRead16 ((UINTN) AcpiDescription->PM1a_CNT_BLK.Address);
  95       Value = (Value & 0xc3ff) | 0x2000 | (AcpiDescription->SLP_TYPa << 10);
  96       MmioWrite16 ((UINTN) AcpiDescription->PM1a_CNT_BLK.Address, Value);
  97       break;
  98     }
  99   }
 100
 101   //
 102   // 2. Write SLP_TYPb
 103   //
 104   if ((AcpiDescription->PM1b_CNT_BLK.Address != 0) && (AcpiDescription->SLP_TYPb != 0)) {
 105     switch (AcpiDescription->PM1b_CNT_BLK.AddressSpaceId) {
 106     case EFI_ACPI_3_0_SYSTEM_IO:
 107       Value = IoRead16 ((UINTN) AcpiDescription->PM1b_CNT_BLK.Address);
 108       Value = (Value & 0xc3ff) | 0x2000 | (AcpiDescription->SLP_TYPb << 10);
 109       IoWrite16 ((UINTN) AcpiDescription->PM1b_CNT_BLK.Address, Value);
 110       break;
 111     case EFI_ACPI_3_0_SYSTEM_MEMORY:
 112       Value = MmioRead16 ((UINTN) AcpiDescription->PM1b_CNT_BLK.Address);
 113       Value = (Value & 0xc3ff) | 0x2000 | (AcpiDescription->SLP_TYPb << 10);
 114       MmioWrite16 ((UINTN) AcpiDescription->PM1b_CNT_BLK.Address, Value);
 115       break;
 116     }
 117   }
 118
 119   //
 120   // Done, if code runs here, mean not shutdown correctly
 121   //
 122   return EFI_UNSUPPORTED;
 123 }
 124
 125 /**
 126   Reset the system.
 127
 128   @param[in] ResetType       Warm or cold
 129   @param[in] ResetStatus     Possible cause of reset
 130   @param[in] DataSize        Size of ResetData in bytes
 131   @param[in] ResetData       Optional Unicode string
 132   @param[in] AcpiDescription Global variable to record reset info
 133
 134 **/
 135 VOID
 136 EFIAPI
 137 AcpiResetSystem (
 138   IN EFI_RESET_TYPE   ResetType,
 139   IN EFI_STATUS       ResetStatus,
 140   IN UINTN            DataSize,
 141   IN CHAR16           *ResetData, OPTIONAL
 142   IN EFI_ACPI_DESCRIPTION *AcpiDescription
 143   )
 144 {
 145   EFI_STATUS  Status;
 146
 147   switch (ResetType) {
 148   case EfiResetWarm:
 149   case EfiResetCold:
 150     SystemReset (AcpiDescription);
 151     break;
 152
 153   case EfiResetShutdown:
 154     Status = SystemShutdown (AcpiDescription);
 155     if (EFI_ERROR (Status)) {
 156       SystemReset (AcpiDescription);
 157     }
 158     break;
 159
 160   default:
 161     return ;
 162   }
 163
 164   //
 165   // Given we should have reset getting here would be bad
 166   //
 167   ASSERT (FALSE);
 168 }
 169
 170 BOOLEAN
 171 GetAcpiDescription (
 172   IN EFI_ACPI_DESCRIPTION *AcpiDescription
 173   )
 174 {
 175   EFI_HOB_GUID_TYPE       *HobAcpiDescription;
 176   //
 177   // Get AcpiDescription Hob
 178   //
 179   HobAcpiDescription = GetFirstGuidHob (&gEfiAcpiDescriptionGuid);
 180   if (HobAcpiDescription == NULL) {
 181     return FALSE;
 182   }
 183
 184   //
 185   // Copy it to Runtime Memory
 186   //
 187   ASSERT (sizeof (EFI_ACPI_DESCRIPTION) == GET_GUID_HOB_DATA_SIZE (HobAcpiDescription));
 188   CopyMem (AcpiDescription, GET_GUID_HOB_DATA (HobAcpiDescription), sizeof (EFI_ACPI_DESCRIPTION));
 189
 190   DEBUG ((EFI_D_ERROR, "ACPI Reset Base - %lx\n", AcpiDescription->RESET_REG.Address));
 191   DEBUG ((EFI_D_ERROR, "ACPI Reset Value - %02x\n", (UINTN)AcpiDescription->RESET_VALUE));
 192   DEBUG ((EFI_D_ERROR, "IAPC support - %x\n", (UINTN)(AcpiDescription->IAPC_BOOT_ARCH)));
 193   return TRUE;
 194 }