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
AcpiPmControl(UINTN SuspendType)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
ResetCold(VOID)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
ResetWarm(VOID)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
ResetShutdown(VOID)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
EnterS3WithImmediateWake(VOID)157 EnterS3WithImmediateWake (
158 VOID
159 )
160 {
161 AcpiPmControl (5);
162 ASSERT (FALSE);
163 }
164