CorebootPayloadPkg/Library/ResetSystemLib/ResetSystemLib.c

   1 /** @file
   2   Reset System Library functions for coreboot
   3
   4   Copyright (c) 2014, Intel Corporation. All rights reserved.<BR>
   5   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 <PiDxe.h>
  16 #include <Library/BaseLib.h>
  17 #include <Library/DebugLib.h>
  18 #include <Library/IoLib.h>
  19 #include <Library/HobLib.h>
  20
  21 #include <Guid/AcpiBoardInfoGuid.h>
  22
  23 VOID
  24 AcpiPmControl (
  25   UINTN SuspendType
  26   )
  27 {
  28         EFI_HOB_GUID_TYPE  *GuidHob;
  29         ACPI_BOARD_INFO    *pAcpiBoardInfo;
  30         UINTN PmCtrlReg = 0;
  31
  32   ASSERT (SuspendType <= 7);
  33   //
  34         // Find the acpi board information guid hob
  35         //
  36         GuidHob = GetFirstGuidHob (&gUefiAcpiBoardInfoGuid);
  37         ASSERT (GuidHob != NULL);
  38   pAcpiBoardInfo = (ACPI_BOARD_INFO *)GET_GUID_HOB_DATA (GuidHob);
  39
  40   PmCtrlReg = (UINTN)pAcpiBoardInfo->PmCtrlRegBase;
  41   IoAndThenOr16 (PmCtrlReg, (UINT16) ~0x3c00, (UINT16) (SuspendType << 10));
  42   IoOr16 (PmCtrlReg, BIT13);
  43   CpuDeadLoop ();
  44 }
  45
  46 /**
  47   Calling this function causes a system-wide reset. This sets
  48   all circuitry within the system to its initial state. This type of reset
  49   is asynchronous to system operation and operates without regard to
  50   cycle boundaries.
  51
  52   System reset should not return, if it returns, it means the system does
  53   not support cold reset.
  54 **/
  55 VOID
  56 EFIAPI
  57 ResetCold (
  58   VOID
  59   )
  60 {
  61   EFI_HOB_GUID_TYPE  *GuidHob;
  62         ACPI_BOARD_INFO    *pAcpiBoardInfo;
  63
  64         //
  65         // Find the acpi board information guid hob
  66         //
  67         GuidHob = GetFirstGuidHob (&gUefiAcpiBoardInfoGuid);
  68         ASSERT (GuidHob != NULL);
  69   pAcpiBoardInfo = (ACPI_BOARD_INFO *)GET_GUID_HOB_DATA (GuidHob);
  70
  71   IoWrite8 ((UINTN)pAcpiBoardInfo->ResetRegAddress, pAcpiBoardInfo->ResetValue);
  72   CpuDeadLoop ();
  73 }
  74
  75 /**
  76   Calling this function causes a system-wide initialization. The processors
  77   are set to their initial state, and pending cycles are not corrupted.
  78
  79   System reset should not return, if it returns, it means the system does
  80   not support warm reset.
  81 **/
  82 VOID
  83 EFIAPI
  84 ResetWarm (
  85   VOID
  86   )
  87 {
  88         EFI_HOB_GUID_TYPE  *GuidHob;
  89         ACPI_BOARD_INFO    *pAcpiBoardInfo;
  90
  91         //
  92         // Find the acpi board information guid hob
  93         //
  94         GuidHob = GetFirstGuidHob (&gUefiAcpiBoardInfoGuid);
  95         ASSERT (GuidHob != NULL);
  96   pAcpiBoardInfo = (ACPI_BOARD_INFO *)GET_GUID_HOB_DATA (GuidHob);
  97
  98   IoWrite8 ((UINTN)pAcpiBoardInfo->ResetRegAddress, pAcpiBoardInfo->ResetValue);
  99   CpuDeadLoop ();
 100 }
 101
 102 /**
 103   Calling this function causes the system to enter a power state equivalent
 104   to the ACPI G2/S5 or G3 states.
 105
 106   System shutdown should not return, if it returns, it means the system does
 107   not support shut down reset.
 108 **/
 109 VOID
 110 EFIAPI
 111 ResetShutdown (
 112   VOID
 113   )
 114 {
 115   AcpiPmControl (7);
 116   ASSERT (FALSE);
 117 }
 118
 119
 120 /**
 121   Calling this function causes the system to enter a power state for capsule
 122   update.
 123
 124   Reset update should not return, if it returns, it means the system does
 125   not support capsule update.
 126
 127 **/
 128 VOID
 129 EFIAPI
 130 EnterS3WithImmediateWake (
 131   VOID
 132   )
 133 {
 134   AcpiPmControl (5);
 135   ASSERT (FALSE);
 136 }