projects / mirror_edk2.git / blame
| Commit | Line | Data |
|---|---|---|
| ca3026d3 AB |
1 | /** @file\r |
| 2 | Support ResetSystem Runtime call using PSCI calls\r | |
| 3 | \r | |
| 9180ab73 | 4 | Note: A similar library is implemented in\r |
| 7fbd1eb2 | 5 | ArmVirtPkg/Library/ArmVirtualizationPsciResetSystemLib\r |
| 9180ab73 OM |
6 | So similar issues might exist in this implementation too.\r |
| 7 | \r | |
| ca3026d3 | 8 | Copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR>\r |
| 7fbd1eb2 | 9 | Copyright (c) 2013-2015, ARM Ltd. All rights reserved.<BR>\r |
| ca3026d3 AB |
10 | Copyright (c) 2014, Linaro Ltd. All rights reserved.<BR>\r |
| 11 | \r | |
| 4059386c | 12 | SPDX-License-Identifier: BSD-2-Clause-Patent\r |
| ca3026d3 AB |
13 | \r |
| 14 | **/\r | |
| 15 | \r | |
| 16 | #include <PiDxe.h>\r | |
| 17 | \r | |
| 18 | #include <Library/BaseLib.h>\r | |
| 19 | #include <Library/DebugLib.h>\r | |
| 20 | #include <Library/EfiResetSystemLib.h>\r | |
| 21 | #include <Library/ArmSmcLib.h>\r | |
| ca3026d3 AB |
22 | \r |
| 23 | #include <IndustryStandard/ArmStdSmc.h>\r | |
| 24 | \r | |
| 25 | /**\r | |
| 26 | Resets the entire platform.\r | |
| 27 | \r | |
| 28 | @param ResetType The type of reset to perform.\r | |
| 29 | @param ResetStatus The status code for the reset.\r | |
| 30 | @param DataSize The size, in bytes, of WatchdogData.\r | |
| 31 | @param ResetData For a ResetType of EfiResetCold, EfiResetWarm, or\r | |
| 32 | EfiResetShutdown the data buffer starts with a Null-terminated\r | |
| 33 | Unicode string, optionally followed by additional binary data.\r | |
| 34 | \r | |
| 35 | **/\r | |
| 36 | EFI_STATUS\r | |
| 37 | EFIAPI\r | |
| 38 | LibResetSystem (\r | |
| 39 | IN EFI_RESET_TYPE ResetType,\r | |
| 40 | IN EFI_STATUS ResetStatus,\r | |
| 41 | IN UINTN DataSize,\r | |
| 42 | IN CHAR16 *ResetData OPTIONAL\r | |
| 43 | )\r | |
| 44 | {\r | |
| 45 | ARM_SMC_ARGS ArmSmcArgs;\r | |
| ca3026d3 AB |
46 | \r |
| 47 | switch (ResetType) {\r | |
| ca3026d3 AB |
48 | case EfiResetPlatformSpecific:\r |
| 49 | // Map the platform specific reset as reboot\r | |
| 50 | case EfiResetWarm:\r | |
| 51 | // Map a warm reset into a cold reset\r | |
| 52 | case EfiResetCold:\r | |
| 53 | // Send a PSCI 0.2 SYSTEM_RESET command\r | |
| 54 | ArmSmcArgs.Arg0 = ARM_SMC_ID_PSCI_SYSTEM_RESET;\r | |
| ca3026d3 AB |
55 | break;\r |
| 56 | case EfiResetShutdown:\r | |
| 57 | // Send a PSCI 0.2 SYSTEM_OFF command\r | |
| 58 | ArmSmcArgs.Arg0 = ARM_SMC_ID_PSCI_SYSTEM_OFF;\r | |
| ca3026d3 AB |
59 | break;\r |
| 60 | default:\r | |
| 61 | ASSERT (FALSE);\r | |
| 62 | return EFI_UNSUPPORTED;\r | |
| 63 | }\r | |
| 64 | \r | |
| 9180ab73 | 65 | ArmCallSmc (&ArmSmcArgs);\r |
| ca3026d3 AB |
66 | \r |
| 67 | // We should never be here\r | |
| a4a582e1 | 68 | DEBUG ((DEBUG_ERROR, "%a: PSCI Reset failed\n", __FUNCTION__));\r |
| ca3026d3 AB |
69 | CpuDeadLoop ();\r |
| 70 | return EFI_UNSUPPORTED;\r | |
| 71 | }\r | |
| 72 | \r | |
| 73 | /**\r | |
| 74 | Initialize any infrastructure required for LibResetSystem () to function.\r | |
| 75 | \r | |
| 76 | @param ImageHandle The firmware allocated handle for the EFI image.\r | |
| 77 | @param SystemTable A pointer to the EFI System Table.\r | |
| 78 | \r | |
| 79 | @retval EFI_SUCCESS The constructor always returns EFI_SUCCESS.\r | |
| 80 | \r | |
| 81 | **/\r | |
| 82 | EFI_STATUS\r | |
| 83 | EFIAPI\r | |
| 84 | LibInitializeResetSystem (\r | |
| 85 | IN EFI_HANDLE ImageHandle,\r | |
| 86 | IN EFI_SYSTEM_TABLE *SystemTable\r | |
| 87 | )\r | |
| 88 | {\r | |
| 89 | return EFI_SUCCESS;\r | |
| 90 | }\r |