Vlv2TbltDevicePkg/Library/ResetSystemLib/ResetSystemLib.c

   1 /** @file
   2
   3   Copyright (c) 2007 - 2016, Intel Corporation. All rights reserved.<BR>
   4   This program and the accompanying materials are licensed and made available under
   5   the terms and conditions of the BSD License that accompanies this distribution.
   6   The full text of the license may be found at
   7   http://opensource.org/licenses/bsd-license.php.
   8
   9   THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  10   WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  11
  12
  13
  14 Module Name:
  15
  16   IdeBus.h
  17
  18 Abstract:
  19
  20   System reset Library Services.  This library class provides a set of
  21   methods to reset whole system with manipulate ICH.
  22
  23 **/
  24
  25
  26 #include <Base.h>
  27
  28
  29 #include <Library/ResetSystemLib.h>
  30 #include <Library/BaseLib.h>
  31 #include <Library/IoLib.h>
  32 #include <Library/DebugLib.h>
  33 #include <Library/PciLib.h>
  34
  35 #include "PchRegs.h"
  36 #include "Rsci.h"
  37 #include "Platform.h"
  38
  39 #define RESET_GENERATOR_PORT R_PCH_RST_CNT
  40
  41 VOID
  42 EFIAPI
  43 PlatformResetHook (
  44   UINT8 ResetType
  45   )
  46 {
  47   //
  48   // Platform need to save OS reset request/types for next Android boot
  49   //
  50   IoWrite8 (0x72, CMOS_RESET_TYPE_BY_OS);
  51   IoWrite8 (0x73, ResetType);
  52 }
  53
  54 /**
  55   Calling this function causes a system-wide reset. This sets
  56   all circuitry within the system to its initial state. This type of reset
  57   is asynchronous to system operation and operates without regard to
  58   cycle boundaries.
  59
  60   System reset should not return, if it returns, it means the system does
  61   not support cold reset.
  62 **/
  63 VOID
  64 EFIAPI
  65 ResetCold (
  66   VOID
  67   )
  68 {
  69   PlatformResetHook(COLD_RESET);
  70   IoWrite8 (RESET_GENERATOR_PORT, 0x2);
  71   IoWrite8 (RESET_GENERATOR_PORT, 0x6);
  72 }
  73
  74 /**
  75   Calling this function causes a system-wide initialization. The processors
  76   are set to their initial state, and pending cycles are not corrupted.
  77
  78   System reset should not return, if it returns, it means the system does
  79   not support warm reset.
  80 **/
  81 VOID
  82 EFIAPI
  83 ResetWarm (
  84   VOID
  85   )
  86 {
  87   PlatformResetHook(WARM_RESET);
  88   IoWrite8 (RESET_GENERATOR_PORT, 0x0);
  89   IoWrite8 (RESET_GENERATOR_PORT, 0x4);
  90 }
  91
  92 /**
  93   Calling this function causes the system to enter a power state equivalent
  94   to the ACPI G2/S5 or G3 states.
  95
  96   System shutdown should not return, if it returns, it means the system does
  97   not support shut down reset.
  98 **/
  99 VOID
 100 EFIAPI
 101 ResetShutdown (
 102   VOID
 103   )
 104 {
 105   UINT16  PchPmioBase;
 106   UINT16  Data16;
 107   UINT32  Data32;
 108
 109   PchPmioBase = (UINT16) (PciRead16 (PCI_LIB_ADDRESS(0, PCI_DEVICE_NUMBER_PCH_LPC, 0, R_PCH_LPC_ACPI_BASE)) & ~BIT0);
 110
 111   //
 112   // Then, GPE0_EN should be disabled to avoid any GPI waking up the system from S5
 113   //
 114   Data16 = 0;
 115   IoWrite16 (
 116     (UINTN)(PchPmioBase + R_PCH_ACPI_GPE0a_EN),
 117     (UINT16)Data16
 118     );
 119
 120   //
 121   // Clear Sleep SMI Status
 122   //
 123   IoWrite16 (PchPmioBase + R_PCH_SMI_STS,
 124              (UINT16)(IoRead16 (PchPmioBase + R_PCH_SMI_STS) | B_PCH_SMI_STS_ON_SLP_EN));
 125   //
 126   // Clear Sleep Type Enable
 127   //
 128   IoWrite16 (PchPmioBase + R_PCH_SMI_EN,
 129              (UINT16)(IoRead16 (PchPmioBase + R_PCH_SMI_EN) & (~B_PCH_SMI_EN_ON_SLP_EN)));
 130   //
 131   // Clear Power Button Status
 132   //
 133   IoWrite16(PchPmioBase + R_PCH_ACPI_PM1_STS, B_PCH_ACPI_PM1_STS_PWRBTN);
 134
 135   //
 136   // Secondly, Power Button Status bit must be cleared
 137   //
 138   // Write a "1" to bit[8] of power button status register at
 139   // (ABASE + PM1_STS) to clear this bit
 140   // Clear it through SMI Status register
 141   //
 142   Data16 = B_PCH_SMI_STS_PM1_STS_REG;
 143   IoWrite16 ((UINTN) (PchPmioBase + R_PCH_SMI_STS), Data16);
 144
 145   //
 146   // Finally, transform system into S5 sleep state
 147   //
 148   Data32  = IoRead32 ((UINTN) (PchPmioBase + R_PCH_ACPI_PM1_CNT));
 149
 150   Data32  = (UINT32) ((Data32 &~(B_PCH_ACPI_PM1_CNT_SLP_TYP + B_PCH_ACPI_PM1_CNT_SLP_EN)) | V_PCH_ACPI_PM1_CNT_S5);
 151
 152   IoWrite32 ((UINTN) (PchPmioBase + R_PCH_ACPI_PM1_CNT), Data32);
 153
 154   Data32 = Data32 | B_PCH_ACPI_PM1_CNT_SLP_EN;
 155
 156   IoWrite32 ((UINTN) (PchPmioBase + R_PCH_ACPI_PM1_CNT), Data32);
 157
 158   return;
 159 }
 160
 161 /**
 162   Calling this function causes the system to enter a power state for capsule
 163   update.
 164
 165   Reset update should not return, if it returns, it means the system does
 166   not support capsule update.
 167
 168 **/
 169 VOID
 170 EFIAPI
 171 EnterS3WithImmediateWake (
 172   VOID
 173   )
 174 {
 175   ASSERT (FALSE);
 176 }
 177
 178 /**
 179   This function causes a systemwide reset. The exact type of the reset is
 180   defined by the EFI_GUID that follows the Null-terminated Unicode string passed
 181   into ResetData. If the platform does not recognize the EFI_GUID in ResetData
 182   the platform must pick a supported reset type to perform.The platform may
 183   optionally log the parameters from any non-normal reset that occurs.
 184
 185   @param[in]  DataSize   The size, in bytes, of ResetData.
 186   @param[in]  ResetData  The data buffer starts with a Null-terminated string,
 187                          followed by the EFI_GUID.
 188 **/
 189 VOID
 190 EFIAPI
 191 ResetPlatformSpecific (
 192   IN UINTN   DataSize,
 193   IN VOID    *ResetData
 194   )
 195 {
 196   ResetCold ();
 197 }