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 EFI_HOB_GUID_TYPE *GuidHob; 116 ACPI_BOARD_INFO *pAcpiBoardInfo; 117 UINTN PmCtrlReg; 118 119 // 120 // Find the acpi board information guid hob 121 // 122 GuidHob = GetFirstGuidHob (&gUefiAcpiBoardInfoGuid); 123 ASSERT (GuidHob != NULL); 124 pAcpiBoardInfo = (ACPI_BOARD_INFO *)GET_GUID_HOB_DATA (GuidHob); 125 126 // 127 // GPE0_EN should be disabled to avoid any GPI waking up the system from S5 128 // 129 IoWrite16 ((UINTN)pAcpiBoardInfo->PmGpeEnBase, 0); 130 131 // 132 // Clear Power Button Status 133 // 134 IoWrite16((UINTN) pAcpiBoardInfo->PmEvtBase, BIT8); 135 136 // 137 // Transform system into S5 sleep state 138 // 139 PmCtrlReg = (UINTN)pAcpiBoardInfo->PmCtrlRegBase; 140 IoAndThenOr16 (PmCtrlReg, (UINT16) ~0x3c00, (UINT16) (7 << 10)); 141 IoOr16 (PmCtrlReg, BIT13); 142 CpuDeadLoop (); 143 144 ASSERT (FALSE); 145 } 146 147 /** 148 Calling this function causes the system to enter a power state for capsule 149 update. 150 151 Reset update should not return, if it returns, it means the system does 152 not support capsule update. 153 154 **/ 155 VOID 156 EFIAPI 157 EnterS3WithImmediateWake ( 158 VOID 159 ) 160 { 161 AcpiPmControl (5); 162 ASSERT (FALSE); 163 } 164
