]>
Commit | Line | Data |
---|---|---|
9180ab73 OM |
1 | /** @file\r |
2 | Support ResetSystem Runtime call using PSCI calls\r | |
3 | \r | |
4 | Note: A similar library is implemented in\r | |
5 | ArmPkg/Library/ArmPsciResetSystemLib. Similar issues might\r | |
6 | exist in this implementation too.\r | |
7 | \r | |
8 | Copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR>\r | |
9 | Copyright (c) 2013, ARM Ltd. All rights reserved.<BR>\r | |
10 | Copyright (c) 2014, Linaro Ltd. All rights reserved.<BR>\r | |
11 | \r | |
12 | This program and the accompanying materials\r | |
13 | are licensed and made available under the terms and conditions of the BSD License\r | |
14 | which accompanies this distribution. The full text of the license may be found at\r | |
15 | http://opensource.org/licenses/bsd-license.php\r | |
16 | \r | |
17 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r | |
18 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r | |
19 | \r | |
20 | **/\r | |
21 | \r | |
22 | #include <PiDxe.h>\r | |
23 | \r | |
24 | #include <Library/BaseLib.h>\r | |
25 | #include <Library/DebugLib.h>\r | |
26 | #include <Library/EfiResetSystemLib.h>\r | |
27 | #include <Library/ArmSmcLib.h>\r | |
28 | #include <Library/ArmHvcLib.h>\r | |
93f9a23f | 29 | #include <Library/UefiBootServicesTableLib.h>\r |
9180ab73 OM |
30 | \r |
31 | #include <IndustryStandard/ArmStdSmc.h>\r | |
32 | \r | |
93f9a23f AB |
33 | #include <Protocol/FdtClient.h>\r |
34 | \r | |
9180ab73 OM |
35 | STATIC UINT32 mArmPsciMethod;\r |
36 | \r | |
37 | RETURN_STATUS\r | |
38 | EFIAPI\r | |
39 | ArmPsciResetSystemLibConstructor (\r | |
40 | VOID\r | |
41 | )\r | |
42 | {\r | |
93f9a23f AB |
43 | EFI_STATUS Status;\r |
44 | FDT_CLIENT_PROTOCOL *FdtClient;\r | |
45 | CONST VOID *Prop;\r | |
46 | \r | |
47 | Status = gBS->LocateProtocol (&gFdtClientProtocolGuid, NULL,\r | |
48 | (VOID **)&FdtClient);\r | |
49 | ASSERT_EFI_ERROR (Status);\r | |
50 | \r | |
51 | Status = FdtClient->FindCompatibleNodeProperty (FdtClient, "arm,psci-0.2",\r | |
52 | "method", &Prop, NULL);\r | |
53 | if (EFI_ERROR (Status)) {\r | |
54 | return Status;\r | |
55 | }\r | |
56 | \r | |
57 | if (AsciiStrnCmp (Prop, "hvc", 3) == 0) {\r | |
58 | mArmPsciMethod = 1;\r | |
59 | } else if (AsciiStrnCmp (Prop, "smc", 3) == 0) {\r | |
60 | mArmPsciMethod = 2;\r | |
61 | } else {\r | |
62 | DEBUG ((EFI_D_ERROR, "%a: Unknown PSCI method \"%a\"\n", __FUNCTION__,\r | |
63 | Prop));\r | |
64 | return EFI_NOT_FOUND;\r | |
65 | }\r | |
66 | return EFI_SUCCESS;\r | |
9180ab73 OM |
67 | }\r |
68 | \r | |
69 | /**\r | |
70 | Resets the entire platform.\r | |
71 | \r | |
72 | @param ResetType The type of reset to perform.\r | |
73 | @param ResetStatus The status code for the reset.\r | |
74 | @param DataSize The size, in bytes, of WatchdogData.\r | |
75 | @param ResetData For a ResetType of EfiResetCold, EfiResetWarm, or\r | |
76 | EfiResetShutdown the data buffer starts with a Null-terminated\r | |
77 | Unicode string, optionally followed by additional binary data.\r | |
78 | \r | |
79 | **/\r | |
80 | EFI_STATUS\r | |
81 | EFIAPI\r | |
82 | LibResetSystem (\r | |
83 | IN EFI_RESET_TYPE ResetType,\r | |
84 | IN EFI_STATUS ResetStatus,\r | |
85 | IN UINTN DataSize,\r | |
86 | IN CHAR16 *ResetData OPTIONAL\r | |
87 | )\r | |
88 | {\r | |
89 | ARM_SMC_ARGS ArmSmcArgs;\r | |
90 | ARM_HVC_ARGS ArmHvcArgs;\r | |
91 | \r | |
92 | switch (ResetType) {\r | |
93 | \r | |
94 | case EfiResetPlatformSpecific:\r | |
95 | // Map the platform specific reset as reboot\r | |
96 | case EfiResetWarm:\r | |
97 | // Map a warm reset into a cold reset\r | |
98 | case EfiResetCold:\r | |
99 | // Send a PSCI 0.2 SYSTEM_RESET command\r | |
100 | ArmSmcArgs.Arg0 = ARM_SMC_ID_PSCI_SYSTEM_RESET;\r | |
101 | ArmHvcArgs.Arg0 = ARM_SMC_ID_PSCI_SYSTEM_RESET;\r | |
102 | break;\r | |
103 | case EfiResetShutdown:\r | |
104 | // Send a PSCI 0.2 SYSTEM_OFF command\r | |
105 | ArmSmcArgs.Arg0 = ARM_SMC_ID_PSCI_SYSTEM_OFF;\r | |
106 | ArmHvcArgs.Arg0 = ARM_SMC_ID_PSCI_SYSTEM_OFF;\r | |
107 | break;\r | |
108 | default:\r | |
109 | ASSERT (FALSE);\r | |
110 | return EFI_UNSUPPORTED;\r | |
111 | }\r | |
112 | \r | |
113 | switch (mArmPsciMethod) {\r | |
114 | case 1:\r | |
115 | ArmCallHvc (&ArmHvcArgs);\r | |
116 | break;\r | |
117 | \r | |
118 | case 2:\r | |
119 | ArmCallSmc (&ArmSmcArgs);\r | |
120 | break;\r | |
121 | \r | |
122 | default:\r | |
123 | DEBUG ((EFI_D_ERROR, "%a: no PSCI method defined\n", __FUNCTION__));\r | |
124 | return EFI_UNSUPPORTED;\r | |
125 | }\r | |
126 | \r | |
127 | // We should never be here\r | |
128 | DEBUG ((EFI_D_ERROR, "%a: PSCI Reset failed\n", __FUNCTION__));\r | |
129 | CpuDeadLoop ();\r | |
130 | return EFI_UNSUPPORTED;\r | |
131 | }\r | |
132 | \r | |
133 | /**\r | |
134 | Initialize any infrastructure required for LibResetSystem () to function.\r | |
135 | \r | |
136 | @param ImageHandle The firmware allocated handle for the EFI image.\r | |
137 | @param SystemTable A pointer to the EFI System Table.\r | |
138 | \r | |
139 | @retval EFI_SUCCESS The constructor always returns EFI_SUCCESS.\r | |
140 | \r | |
141 | **/\r | |
142 | EFI_STATUS\r | |
143 | EFIAPI\r | |
144 | LibInitializeResetSystem (\r | |
145 | IN EFI_HANDLE ImageHandle,\r | |
146 | IN EFI_SYSTEM_TABLE *SystemTable\r | |
147 | )\r | |
148 | {\r | |
149 | return EFI_SUCCESS;\r | |
150 | }\r |