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1 | /** @file\r |
2 | ResetSystemLib implementation using PSCI calls\r | |
3 | \r | |
4 | Copyright (c) 2017, Linaro Ltd. All rights reserved.<BR>\r | |
5 | \r | |
6 | This program and the accompanying materials\r | |
7 | are licensed and made available under the terms and conditions of the BSD License\r | |
8 | which accompanies this distribution. The full text of the license may be found at\r | |
9 | http://opensource.org/licenses/bsd-license.php\r | |
10 | \r | |
11 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r | |
12 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r | |
13 | \r | |
14 | **/\r | |
15 | \r | |
16 | #include <PiDxe.h>\r | |
17 | \r | |
dde2dd64 AB |
18 | #include <Library/ArmMmuLib.h>\r |
19 | #include <Library/ArmSmcLib.h>\r | |
b2c55e73 AB |
20 | #include <Library/BaseLib.h>\r |
21 | #include <Library/DebugLib.h>\r | |
22 | #include <Library/ResetSystemLib.h>\r | |
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23 | #include <Library/UefiBootServicesTableLib.h>\r |
24 | #include <Library/UefiRuntimeLib.h>\r | |
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25 | \r |
26 | #include <IndustryStandard/ArmStdSmc.h>\r | |
27 | \r | |
28 | /**\r | |
29 | This function causes a system-wide reset (cold reset), in which\r | |
30 | all circuitry within the system returns to its initial state. This type of reset\r | |
31 | is asynchronous to system operation and operates without regard to\r | |
32 | cycle boundaries.\r | |
33 | \r | |
34 | If this function returns, it means that the system does not support cold reset.\r | |
35 | **/\r | |
36 | VOID\r | |
37 | EFIAPI\r | |
38 | ResetCold (\r | |
39 | VOID\r | |
40 | )\r | |
41 | {\r | |
42 | ARM_SMC_ARGS ArmSmcArgs;\r | |
43 | \r | |
44 | // Send a PSCI 0.2 SYSTEM_RESET command\r | |
45 | ArmSmcArgs.Arg0 = ARM_SMC_ID_PSCI_SYSTEM_RESET;\r | |
46 | ArmCallSmc (&ArmSmcArgs);\r | |
47 | }\r | |
48 | \r | |
49 | /**\r | |
50 | This function causes a system-wide initialization (warm reset), in which all processors\r | |
51 | are set to their initial state. Pending cycles are not corrupted.\r | |
52 | \r | |
53 | If this function returns, it means that the system does not support warm reset.\r | |
54 | **/\r | |
55 | VOID\r | |
56 | EFIAPI\r | |
57 | ResetWarm (\r | |
58 | VOID\r | |
59 | )\r | |
60 | {\r | |
61 | // Map a warm reset into a cold reset\r | |
62 | ResetCold ();\r | |
63 | }\r | |
64 | \r | |
65 | /**\r | |
66 | This function causes the system to enter a power state equivalent\r | |
67 | to the ACPI G2/S5 or G3 states.\r | |
68 | \r | |
69 | If this function returns, it means that the system does not support shutdown reset.\r | |
70 | **/\r | |
71 | VOID\r | |
72 | EFIAPI\r | |
73 | ResetShutdown (\r | |
74 | VOID\r | |
75 | )\r | |
76 | {\r | |
77 | ARM_SMC_ARGS ArmSmcArgs;\r | |
78 | \r | |
79 | // Send a PSCI 0.2 SYSTEM_OFF command\r | |
80 | ArmSmcArgs.Arg0 = ARM_SMC_ID_PSCI_SYSTEM_OFF;\r | |
81 | ArmCallSmc (&ArmSmcArgs);\r | |
82 | }\r | |
83 | \r | |
84 | /**\r | |
85 | This function causes the system to enter S3 and then wake up immediately.\r | |
86 | \r | |
87 | If this function returns, it means that the system does not support S3 feature.\r | |
88 | **/\r | |
89 | VOID\r | |
90 | EFIAPI\r | |
91 | EnterS3WithImmediateWake (\r | |
92 | VOID\r | |
93 | )\r | |
94 | {\r | |
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95 | VOID (*Reset)(VOID);\r |
96 | \r | |
97 | if (FeaturePcdGet (PcdArmReenterPeiForCapsuleWarmReboot) &&\r | |
98 | !EfiAtRuntime ()) {\r | |
99 | //\r | |
100 | // At boot time, we are the only core running, so we can implement the\r | |
101 | // immediate wake (which is used by capsule update) by disabling the MMU\r | |
102 | // and interrupts, and jumping to the PEI entry point.\r | |
103 | //\r | |
104 | Reset = (VOID (*)(VOID))(UINTN)FixedPcdGet64 (PcdFvBaseAddress);\r | |
105 | \r | |
106 | gBS->RaiseTPL (TPL_HIGH_LEVEL);\r | |
107 | ArmDisableMmu ();\r | |
108 | Reset ();\r | |
109 | }\r | |
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110 | }\r |
111 | \r | |
112 | /**\r | |
113 | This function causes a systemwide reset. The exact type of the reset is\r | |
114 | defined by the EFI_GUID that follows the Null-terminated Unicode string passed\r | |
115 | into ResetData. If the platform does not recognize the EFI_GUID in ResetData\r | |
116 | the platform must pick a supported reset type to perform.The platform may\r | |
117 | optionally log the parameters from any non-normal reset that occurs.\r | |
118 | \r | |
119 | @param[in] DataSize The size, in bytes, of ResetData.\r | |
120 | @param[in] ResetData The data buffer starts with a Null-terminated string,\r | |
121 | followed by the EFI_GUID.\r | |
122 | **/\r | |
123 | VOID\r | |
124 | EFIAPI\r | |
125 | ResetPlatformSpecific (\r | |
126 | IN UINTN DataSize,\r | |
127 | IN VOID *ResetData\r | |
128 | )\r | |
129 | {\r | |
130 | // Map the platform specific reset as reboot\r | |
131 | ResetCold ();\r | |
132 | }\r |