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b2c55e73 AB |
1 | /** @file\r |
2 | ResetSystemLib implementation using PSCI calls\r | |
3 | \r | |
6556224e | 4 | Copyright (c) 2017 - 2018, Linaro Ltd. All rights reserved.<BR>\r |
bda4d5be | 5 | Copyright (c) 2019, Intel Corporation. All rights reserved.<BR>\r |
b2c55e73 | 6 | \r |
4059386c | 7 | SPDX-License-Identifier: BSD-2-Clause-Patent\r |
b2c55e73 AB |
8 | \r |
9 | **/\r | |
10 | \r | |
11 | #include <PiDxe.h>\r | |
12 | \r | |
dde2dd64 AB |
13 | #include <Library/ArmMmuLib.h>\r |
14 | #include <Library/ArmSmcLib.h>\r | |
b2c55e73 AB |
15 | #include <Library/BaseLib.h>\r |
16 | #include <Library/DebugLib.h>\r | |
17 | #include <Library/ResetSystemLib.h>\r | |
dde2dd64 AB |
18 | #include <Library/UefiBootServicesTableLib.h>\r |
19 | #include <Library/UefiRuntimeLib.h>\r | |
b2c55e73 AB |
20 | \r |
21 | #include <IndustryStandard/ArmStdSmc.h>\r | |
22 | \r | |
23 | /**\r | |
24 | This function causes a system-wide reset (cold reset), in which\r | |
25 | all circuitry within the system returns to its initial state. This type of reset\r | |
26 | is asynchronous to system operation and operates without regard to\r | |
27 | cycle boundaries.\r | |
28 | \r | |
29 | If this function returns, it means that the system does not support cold reset.\r | |
30 | **/\r | |
31 | VOID\r | |
32 | EFIAPI\r | |
33 | ResetCold (\r | |
34 | VOID\r | |
35 | )\r | |
36 | {\r | |
37 | ARM_SMC_ARGS ArmSmcArgs;\r | |
38 | \r | |
39 | // Send a PSCI 0.2 SYSTEM_RESET command\r | |
40 | ArmSmcArgs.Arg0 = ARM_SMC_ID_PSCI_SYSTEM_RESET;\r | |
41 | ArmCallSmc (&ArmSmcArgs);\r | |
42 | }\r | |
43 | \r | |
44 | /**\r | |
45 | This function causes a system-wide initialization (warm reset), in which all processors\r | |
46 | are set to their initial state. Pending cycles are not corrupted.\r | |
47 | \r | |
48 | If this function returns, it means that the system does not support warm reset.\r | |
49 | **/\r | |
50 | VOID\r | |
51 | EFIAPI\r | |
52 | ResetWarm (\r | |
53 | VOID\r | |
54 | )\r | |
55 | {\r | |
56 | // Map a warm reset into a cold reset\r | |
57 | ResetCold ();\r | |
58 | }\r | |
59 | \r | |
60 | /**\r | |
61 | This function causes the system to enter a power state equivalent\r | |
62 | to the ACPI G2/S5 or G3 states.\r | |
63 | \r | |
64 | If this function returns, it means that the system does not support shutdown reset.\r | |
65 | **/\r | |
66 | VOID\r | |
67 | EFIAPI\r | |
68 | ResetShutdown (\r | |
69 | VOID\r | |
70 | )\r | |
71 | {\r | |
72 | ARM_SMC_ARGS ArmSmcArgs;\r | |
73 | \r | |
74 | // Send a PSCI 0.2 SYSTEM_OFF command\r | |
75 | ArmSmcArgs.Arg0 = ARM_SMC_ID_PSCI_SYSTEM_OFF;\r | |
76 | ArmCallSmc (&ArmSmcArgs);\r | |
77 | }\r | |
78 | \r | |
6556224e AB |
79 | VOID DisableMmuAndReenterPei (VOID);\r |
80 | \r | |
b2c55e73 AB |
81 | /**\r |
82 | This function causes the system to enter S3 and then wake up immediately.\r | |
83 | \r | |
84 | If this function returns, it means that the system does not support S3 feature.\r | |
85 | **/\r | |
86 | VOID\r | |
87 | EFIAPI\r | |
88 | EnterS3WithImmediateWake (\r | |
89 | VOID\r | |
90 | )\r | |
91 | {\r | |
6556224e AB |
92 | EFI_PHYSICAL_ADDRESS Alloc;\r |
93 | EFI_MEMORY_DESCRIPTOR *MemMap;\r | |
94 | UINTN MemMapSize;\r | |
95 | UINTN MapKey, DescriptorSize;\r | |
96 | UINT32 DescriptorVersion;\r | |
97 | EFI_STATUS Status;\r | |
dde2dd64 AB |
98 | \r |
99 | if (FeaturePcdGet (PcdArmReenterPeiForCapsuleWarmReboot) &&\r | |
100 | !EfiAtRuntime ()) {\r | |
101 | //\r | |
102 | // At boot time, we are the only core running, so we can implement the\r | |
103 | // immediate wake (which is used by capsule update) by disabling the MMU\r | |
104 | // and interrupts, and jumping to the PEI entry point.\r | |
105 | //\r | |
dde2dd64 | 106 | \r |
6556224e AB |
107 | //\r |
108 | // Obtain the size of the memory map\r | |
109 | //\r | |
110 | MemMapSize = 0;\r | |
111 | MemMap = NULL;\r | |
112 | Status = gBS->GetMemoryMap (&MemMapSize, MemMap, &MapKey, &DescriptorSize,\r | |
113 | &DescriptorVersion);\r | |
114 | ASSERT (Status == EFI_BUFFER_TOO_SMALL);\r | |
115 | \r | |
116 | //\r | |
117 | // Add some slack to the allocation to cater for changes in the memory\r | |
118 | // map if ExitBootServices () fails the first time around.\r | |
119 | //\r | |
120 | MemMapSize += SIZE_4KB;\r | |
121 | Status = gBS->AllocatePages (AllocateAnyPages, EfiBootServicesData,\r | |
122 | EFI_SIZE_TO_PAGES (MemMapSize), &Alloc);\r | |
123 | ASSERT_EFI_ERROR (Status);\r | |
124 | \r | |
125 | MemMap = (EFI_MEMORY_DESCRIPTOR *)(UINTN)Alloc;\r | |
126 | \r | |
127 | Status = gBS->GetMemoryMap (&MemMapSize, MemMap, &MapKey, &DescriptorSize,\r | |
128 | &DescriptorVersion);\r | |
129 | ASSERT_EFI_ERROR (Status);\r | |
130 | \r | |
131 | Status = gBS->ExitBootServices (gImageHandle, MapKey);\r | |
132 | if (EFI_ERROR (Status)) {\r | |
133 | //\r | |
134 | // ExitBootServices () may fail the first time around if an event fired\r | |
135 | // right after the call to GetMemoryMap() which allocated or freed memory.\r | |
136 | // Since that first call to ExitBootServices () will disarm the timer,\r | |
137 | // this is guaranteed not to happen again, so one additional attempt\r | |
138 | // should suffice.\r | |
139 | //\r | |
140 | Status = gBS->GetMemoryMap (&MemMapSize, MemMap, &MapKey, &DescriptorSize,\r | |
141 | &DescriptorVersion);\r | |
142 | ASSERT_EFI_ERROR (Status);\r | |
143 | \r | |
144 | Status = gBS->ExitBootServices (gImageHandle, MapKey);\r | |
145 | ASSERT_EFI_ERROR (Status);\r | |
146 | }\r | |
147 | \r | |
148 | DisableMmuAndReenterPei ();\r | |
dde2dd64 | 149 | }\r |
b2c55e73 AB |
150 | }\r |
151 | \r | |
152 | /**\r | |
153 | This function causes a systemwide reset. The exact type of the reset is\r | |
154 | defined by the EFI_GUID that follows the Null-terminated Unicode string passed\r | |
155 | into ResetData. If the platform does not recognize the EFI_GUID in ResetData\r | |
156 | the platform must pick a supported reset type to perform.The platform may\r | |
157 | optionally log the parameters from any non-normal reset that occurs.\r | |
158 | \r | |
159 | @param[in] DataSize The size, in bytes, of ResetData.\r | |
160 | @param[in] ResetData The data buffer starts with a Null-terminated string,\r | |
161 | followed by the EFI_GUID.\r | |
162 | **/\r | |
163 | VOID\r | |
164 | EFIAPI\r | |
165 | ResetPlatformSpecific (\r | |
166 | IN UINTN DataSize,\r | |
167 | IN VOID *ResetData\r | |
168 | )\r | |
169 | {\r | |
170 | // Map the platform specific reset as reboot\r | |
171 | ResetCold ();\r | |
172 | }\r | |
bda4d5be ZG |
173 | \r |
174 | /**\r | |
175 | The ResetSystem function resets the entire platform.\r | |
176 | \r | |
177 | @param[in] ResetType The type of reset to perform.\r | |
178 | @param[in] ResetStatus The status code for the reset.\r | |
179 | @param[in] DataSize The size, in bytes, of ResetData.\r | |
180 | @param[in] ResetData For a ResetType of EfiResetCold, EfiResetWarm, or EfiResetShutdown\r | |
181 | the data buffer starts with a Null-terminated string, optionally\r | |
182 | followed by additional binary data. The string is a description\r | |
183 | that the caller may use to further indicate the reason for the\r | |
184 | system reset.\r | |
185 | **/\r | |
186 | VOID\r | |
187 | EFIAPI\r | |
188 | ResetSystem (\r | |
189 | IN EFI_RESET_TYPE ResetType,\r | |
190 | IN EFI_STATUS ResetStatus,\r | |
191 | IN UINTN DataSize,\r | |
192 | IN VOID *ResetData OPTIONAL\r | |
193 | )\r | |
194 | {\r | |
195 | switch (ResetType) {\r | |
196 | case EfiResetWarm:\r | |
197 | ResetWarm ();\r | |
198 | break;\r | |
199 | \r | |
200 | case EfiResetCold:\r | |
201 | ResetCold ();\r | |
202 | break;\r | |
203 | \r | |
204 | case EfiResetShutdown:\r | |
205 | ResetShutdown ();\r | |
206 | return;\r | |
207 | \r | |
208 | case EfiResetPlatformSpecific:\r | |
209 | ResetPlatformSpecific (DataSize, ResetData);\r | |
210 | return;\r | |
211 | \r | |
212 | default:\r | |
213 | return;\r | |
214 | }\r | |
215 | }\r |