1 /** @file
2 Reset Architectural Protocol implementation
3
4 Copyright (c) 2006 - 2016, Intel Corporation. All rights reserved.<BR>
5
6 This program and the accompanying materials
7 are licensed and made available under the terms and conditions of the BSD License
8 which accompanies this distribution. The full text of the license may be found at
9 http://opensource.org/licenses/bsd-license.php
10
11 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
12 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
13
14 **/
15
16 #include "ResetSystem.h"
17
18 //
19 // The handle onto which the Reset Architectural Protocol is installed
20 //
21 EFI_HANDLE mResetHandle = NULL;
22
23 /**
24 The driver's entry point.
25
26 It initializes the Reset Architectural Protocol.
27
28 @param[in] ImageHandle The firmware allocated handle for the EFI image.
29 @param[in] SystemTable A pointer to the EFI System Table.
30
31 @retval EFI_SUCCESS The entry point is executed successfully.
32 @retval other Cannot install ResetArch protocol.
33
34 **/
35 EFI_STATUS
36 EFIAPI
InitializeResetSystem(IN EFI_HANDLE ImageHandle,IN EFI_SYSTEM_TABLE * SystemTable)37 InitializeResetSystem (
38 IN EFI_HANDLE ImageHandle,
39 IN EFI_SYSTEM_TABLE *SystemTable
40 )
41 {
42 EFI_STATUS Status;
43
44 //
45 // Make sure the Reset Architectural Protocol is not already installed in the system
46 //
47 ASSERT_PROTOCOL_ALREADY_INSTALLED (NULL, &gEfiResetArchProtocolGuid);
48
49 //
50 // Hook the runtime service table
51 //
52 gRT->ResetSystem = ResetSystem;
53
54 //
55 // Now install the Reset RT AP on a new handle
56 //
57 Status = gBS->InstallMultipleProtocolInterfaces (
58 &mResetHandle,
59 &gEfiResetArchProtocolGuid,
60 NULL,
61 NULL
62 );
63 ASSERT_EFI_ERROR (Status);
64
65 return Status;
66 }
67
68 /**
69 Put the system into S3 power state.
70 **/
71 VOID
DoS3(VOID)72 DoS3 (
73 VOID
74 )
75 {
76 EnterS3WithImmediateWake ();
77
78 //
79 // Should not return
80 //
81 CpuDeadLoop ();
82 }
83
84 /**
85 Resets the entire platform.
86
87 @param[in] ResetType The type of reset to perform.
88 @param[in] ResetStatus The status code for the reset.
89 @param[in] DataSize The size, in bytes, of ResetData.
90 @param[in] ResetData For a ResetType of EfiResetCold, EfiResetWarm, or
91 EfiResetShutdown the data buffer starts with a Null-terminated
92 string, optionally followed by additional binary data.
93 The string is a description that the caller may use to further
94 indicate the reason for the system reset. ResetData is only
95 valid if ResetStatus is something other than EFI_SUCCESS
96 unless the ResetType is EfiResetPlatformSpecific
97 where a minimum amount of ResetData is always required.
98 **/
99 VOID
100 EFIAPI
ResetSystem(IN EFI_RESET_TYPE ResetType,IN EFI_STATUS ResetStatus,IN UINTN DataSize,IN VOID * ResetData OPTIONAL)101 ResetSystem (
102 IN EFI_RESET_TYPE ResetType,
103 IN EFI_STATUS ResetStatus,
104 IN UINTN DataSize,
105 IN VOID *ResetData OPTIONAL
106 )
107 {
108 EFI_STATUS Status;
109 UINTN Size;
110 UINTN CapsuleDataPtr;
111
112 //
113 // Indicate reset system runtime service is called.
114 //
115 REPORT_STATUS_CODE (EFI_PROGRESS_CODE, (EFI_SOFTWARE_EFI_RUNTIME_SERVICE | EFI_SW_RS_PC_RESET_SYSTEM));
116
117 switch (ResetType) {
118 case EfiResetWarm:
119
120 //
121 //Check if there are pending capsules to process
122 //
123 Size = sizeof (CapsuleDataPtr);
124 Status = EfiGetVariable (
125 EFI_CAPSULE_VARIABLE_NAME,
126 &gEfiCapsuleVendorGuid,
127 NULL,
128 &Size,
129 (VOID *) &CapsuleDataPtr
130 );
131
132 if (Status == EFI_SUCCESS) {
133 //
134 //Process capsules across a system reset.
135 //
136 DoS3();
137 }
138
139 ResetWarm ();
140
141 break;
142
143 case EfiResetCold:
144 ResetCold ();
145 break;
146
147 case EfiResetShutdown:
148 ResetShutdown ();
149 return ;
150
151 case EfiResetPlatformSpecific:
152 ResetPlatformSpecific (DataSize, ResetData);
153 return;
154
155 default:
156 return ;
157 }
158
159 //
160 // Given we should have reset getting here would be bad
161 //
162 ASSERT (FALSE);
163 }
164