1 /********************************************************************************
2 Copyright (C) 2016 Marvell International Ltd.
3
4 Marvell BSD License Option
5
6 If you received this File from Marvell, you may opt to use, redistribute and/or
7 modify this File under the following licensing terms.
8 Redistribution and use in source and binary forms, with or without modification,
9 are permitted provided that the following conditions are met:
10
11 * Redistributions of source code must retain the above copyright notice,
12 this list of conditions and the following disclaimer.
13
14 * Redistributions in binary form must reproduce the above copyright
15 notice, this list of conditions and the following disclaimer in the
16 documentation and/or other materials provided with the distribution.
17
18 * Neither the name of Marvell nor the names of its contributors may be
19 used to endorse or promote products derived from this software without
20 specific prior written permission.
21
22 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
23 ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
24 WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
25 DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
26 ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
27 (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
28 LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
29 ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
30 (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
31 SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
32
33 *******************************************************************************/
34
35
36 #include <PiDxe.h>
37 #include <Uefi.h>
38
39 #include <Library/BaseLib.h>
40 #include <Library/DebugLib.h>
41 #include <Library/DxeServicesTableLib.h>
42 #include <Library/IoLib.h>
43 #include <Library/UefiLib.h>
44 #include <Library/UefiBootServicesTableLib.h>
45 #include <Library/UefiRuntimeLib.h>
46 #include <Library/UefiRuntimeServicesTableLib.h>
47
48 #include <Guid/EventGroup.h>
49
50 STATIC EFI_EVENT mResetSystemVirtualAddrChangeEvent;
51 STATIC UINT64 mAddress;
52
53 STATIC
54 VOID
55 EFIAPI
LibResetSystemVirtualNotifyEvent(IN EFI_EVENT Event,IN VOID * Context)56 LibResetSystemVirtualNotifyEvent (
57 IN EFI_EVENT Event,
58 IN VOID *Context
59 )
60 {
61 //
62 // Convert physical address to virtual address.
63 //
64 EfiConvertPointer (0x0, (VOID**)&mAddress);
65 return;
66 }
67
68 /**
69 Resets the entire platform.
70
71 @param ResetType The type of reset to perform.
72 @param ResetStatus The status code for the reset.
73 @param DataSize The size, in bytes, of WatchdogData.
74 @param ResetData For a ResetType of EfiResetCold, EfiResetWarm,
75 or EfiResetShutdown the data buffer starts with
76 a Null-terminated Unicode string, optionally
77 followed by additional binary data.
78 **/
79 EFI_STATUS
80 EFIAPI
LibResetSystem(IN EFI_RESET_TYPE ResetType,IN EFI_STATUS ResetStatus,IN UINTN DataSize,IN VOID * ResetData OPTIONAL)81 LibResetSystem (
82 IN EFI_RESET_TYPE ResetType,
83 IN EFI_STATUS ResetStatus,
84 IN UINTN DataSize,
85 IN VOID *ResetData OPTIONAL
86 )
87 {
88 UINT32 Data;
89
90 switch (ResetType) {
91 case EfiResetCold:
92 case EfiResetWarm:
93 Data = MmioRead32 (mAddress);
94 Data &= ~PcdGet32 (PcdResetRegMask);
95 MmioWrite32 (mAddress, Data);
96 break;
97 case EfiResetShutdown:
98 //
99 // Currently there is no support for power-off platform
100 //
101 break;
102 default:
103 break;
104 }
105
106 return EFI_DEVICE_ERROR;
107 }
108
109 EFI_STATUS
110 EFIAPI
LibInitializeResetSystem(IN EFI_HANDLE ImageHandle,IN EFI_SYSTEM_TABLE * SystemTable)111 LibInitializeResetSystem (
112 IN EFI_HANDLE ImageHandle,
113 IN EFI_SYSTEM_TABLE *SystemTable
114 )
115 {
116 UINT64 Alignment;
117 EFI_STATUS Status;
118
119 mAddress = PcdGet64 (PcdResetRegAddress);
120
121 Alignment = ~(SIZE_64KB - 1);
122 //
123 // Add 64KB aligned and 64KB long memory space
124 //
125 Status = gDS->AddMemorySpace (
126 EfiGcdMemoryTypeMemoryMappedIo,
127 mAddress & Alignment, SIZE_64KB,
128 EFI_MEMORY_UC | EFI_MEMORY_RUNTIME
129 );
130 if (EFI_ERROR (Status)) {
131 ASSERT_EFI_ERROR (Status);
132 return Status;
133 }
134
135 //
136 // Mark 64KB aligned and 64KB long memory space as runtime
137 //
138 Status = gDS->SetMemorySpaceAttributes (mAddress & Alignment, SIZE_64KB,
139 EFI_MEMORY_UC | EFI_MEMORY_RUNTIME);
140 if (EFI_ERROR (Status)) {
141 ASSERT_EFI_ERROR (Status);
142 return Status;
143 }
144
145 //
146 // Register for the virtual address change event
147 //
148 Status = gBS->CreateEventEx (
149 EVT_NOTIFY_SIGNAL,
150 TPL_NOTIFY,
151 LibResetSystemVirtualNotifyEvent,
152 NULL,
153 &gEfiEventVirtualAddressChangeGuid,
154 &mResetSystemVirtualAddrChangeEvent
155 );
156 ASSERT_EFI_ERROR (Status);
157
158 return Status;
159 }
160