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1 | /** @file\r |
2 | Support ResetSystem Runtime call using PSCI calls\r | |
3 | \r | |
4 | Copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR>\r | |
5 | Copyright (c) 2013, ARM Ltd. All rights reserved.<BR>\r | |
6 | Copyright (c) 2014, Linaro Ltd. All rights reserved.<BR>\r | |
7 | \r | |
8 | This program and the accompanying materials\r | |
9 | are licensed and made available under the terms and conditions of the BSD License\r | |
10 | which accompanies this distribution. The full text of the license may be found at\r | |
11 | http://opensource.org/licenses/bsd-license.php\r | |
12 | \r | |
13 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r | |
14 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r | |
15 | \r | |
16 | **/\r | |
17 | \r | |
18 | #include <PiDxe.h>\r | |
19 | \r | |
20 | #include <Library/BaseLib.h>\r | |
21 | #include <Library/DebugLib.h>\r | |
22 | #include <Library/EfiResetSystemLib.h>\r | |
23 | #include <Library/ArmSmcLib.h>\r | |
24 | #include <Library/ArmHvcLib.h>\r | |
25 | \r | |
26 | #include <IndustryStandard/ArmStdSmc.h>\r | |
27 | \r | |
28 | /**\r | |
29 | Resets the entire platform.\r | |
30 | \r | |
31 | @param ResetType The type of reset to perform.\r | |
32 | @param ResetStatus The status code for the reset.\r | |
33 | @param DataSize The size, in bytes, of WatchdogData.\r | |
34 | @param ResetData For a ResetType of EfiResetCold, EfiResetWarm, or\r | |
35 | EfiResetShutdown the data buffer starts with a Null-terminated\r | |
36 | Unicode string, optionally followed by additional binary data.\r | |
37 | \r | |
38 | **/\r | |
39 | EFI_STATUS\r | |
40 | EFIAPI\r | |
41 | LibResetSystem (\r | |
42 | IN EFI_RESET_TYPE ResetType,\r | |
43 | IN EFI_STATUS ResetStatus,\r | |
44 | IN UINTN DataSize,\r | |
45 | IN CHAR16 *ResetData OPTIONAL\r | |
46 | )\r | |
47 | {\r | |
48 | ARM_SMC_ARGS ArmSmcArgs;\r | |
49 | ARM_HVC_ARGS ArmHvcArgs;\r | |
50 | \r | |
51 | switch (ResetType) {\r | |
52 | \r | |
53 | case EfiResetPlatformSpecific:\r | |
54 | // Map the platform specific reset as reboot\r | |
55 | case EfiResetWarm:\r | |
56 | // Map a warm reset into a cold reset\r | |
57 | case EfiResetCold:\r | |
58 | // Send a PSCI 0.2 SYSTEM_RESET command\r | |
59 | ArmSmcArgs.Arg0 = ARM_SMC_ID_PSCI_SYSTEM_RESET;\r | |
60 | ArmHvcArgs.Arg0 = ARM_SMC_ID_PSCI_SYSTEM_RESET;\r | |
61 | break;\r | |
62 | case EfiResetShutdown:\r | |
63 | // Send a PSCI 0.2 SYSTEM_OFF command\r | |
64 | ArmSmcArgs.Arg0 = ARM_SMC_ID_PSCI_SYSTEM_OFF;\r | |
65 | ArmHvcArgs.Arg0 = ARM_SMC_ID_PSCI_SYSTEM_OFF;\r | |
66 | break;\r | |
67 | default:\r | |
68 | ASSERT (FALSE);\r | |
69 | return EFI_UNSUPPORTED;\r | |
70 | }\r | |
71 | \r | |
72 | switch (PcdGet32 (PcdArmPsciMethod)) {\r | |
73 | case 1:\r | |
74 | ArmCallHvc (&ArmHvcArgs);\r | |
75 | break;\r | |
76 | \r | |
77 | case 2:\r | |
78 | ArmCallSmc (&ArmSmcArgs);\r | |
79 | break;\r | |
80 | \r | |
81 | default:\r | |
82 | DEBUG ((EFI_D_ERROR, "%a: no PSCI method defined\n", __FUNCTION__));\r | |
83 | return EFI_UNSUPPORTED;\r | |
84 | }\r | |
85 | \r | |
86 | // We should never be here\r | |
87 | DEBUG ((EFI_D_ERROR, "%a: PSCI Reset failed\n", __FUNCTION__));\r | |
88 | CpuDeadLoop ();\r | |
89 | return EFI_UNSUPPORTED;\r | |
90 | }\r | |
91 | \r | |
92 | /**\r | |
93 | Initialize any infrastructure required for LibResetSystem () to function.\r | |
94 | \r | |
95 | @param ImageHandle The firmware allocated handle for the EFI image.\r | |
96 | @param SystemTable A pointer to the EFI System Table.\r | |
97 | \r | |
98 | @retval EFI_SUCCESS The constructor always returns EFI_SUCCESS.\r | |
99 | \r | |
100 | **/\r | |
101 | EFI_STATUS\r | |
102 | EFIAPI\r | |
103 | LibInitializeResetSystem (\r | |
104 | IN EFI_HANDLE ImageHandle,\r | |
105 | IN EFI_SYSTEM_TABLE *SystemTable\r | |
106 | )\r | |
107 | {\r | |
108 | return EFI_SUCCESS;\r | |
109 | }\r |