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 | |
| 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 | |
| ca3026d3 AB |
28 | \r |
| 29 | #include <IndustryStandard/ArmStdSmc.h>\r | |
| 30 | \r | |
| 31 | /**\r | |
| 32 | Resets the entire platform.\r | |
| 33 | \r | |
| 34 | @param ResetType The type of reset to perform.\r | |
| 35 | @param ResetStatus The status code for the reset.\r | |
| 36 | @param DataSize The size, in bytes, of WatchdogData.\r | |
| 37 | @param ResetData For a ResetType of EfiResetCold, EfiResetWarm, or\r | |
| 38 | EfiResetShutdown the data buffer starts with a Null-terminated\r | |
| 39 | Unicode string, optionally followed by additional binary data.\r | |
| 40 | \r | |
| 41 | **/\r | |
| 42 | EFI_STATUS\r | |
| 43 | EFIAPI\r | |
| 44 | LibResetSystem (\r | |
| 45 | IN EFI_RESET_TYPE ResetType,\r | |
| 46 | IN EFI_STATUS ResetStatus,\r | |
| 47 | IN UINTN DataSize,\r | |
| 48 | IN CHAR16 *ResetData OPTIONAL\r | |
| 49 | )\r | |
| 50 | {\r | |
| 51 | ARM_SMC_ARGS ArmSmcArgs;\r | |
| ca3026d3 AB |
52 | \r |
| 53 | switch (ResetType) {\r | |
| ca3026d3 AB |
54 | case EfiResetPlatformSpecific:\r |
| 55 | // Map the platform specific reset as reboot\r | |
| 56 | case EfiResetWarm:\r | |
| 57 | // Map a warm reset into a cold reset\r | |
| 58 | case EfiResetCold:\r | |
| 59 | // Send a PSCI 0.2 SYSTEM_RESET command\r | |
| 60 | ArmSmcArgs.Arg0 = ARM_SMC_ID_PSCI_SYSTEM_RESET;\r | |
| ca3026d3 AB |
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 | |
| ca3026d3 AB |
65 | break;\r |
| 66 | default:\r | |
| 67 | ASSERT (FALSE);\r | |
| 68 | return EFI_UNSUPPORTED;\r | |
| 69 | }\r | |
| 70 | \r | |
| 9180ab73 | 71 | ArmCallSmc (&ArmSmcArgs);\r |
| ca3026d3 AB |
72 | \r |
| 73 | // We should never be here\r | |
| 74 | DEBUG ((EFI_D_ERROR, "%a: PSCI Reset failed\n", __FUNCTION__));\r | |
| 75 | CpuDeadLoop ();\r | |
| 76 | return EFI_UNSUPPORTED;\r | |
| 77 | }\r | |
| 78 | \r | |
| 79 | /**\r | |
| 80 | Initialize any infrastructure required for LibResetSystem () to function.\r | |
| 81 | \r | |
| 82 | @param ImageHandle The firmware allocated handle for the EFI image.\r | |
| 83 | @param SystemTable A pointer to the EFI System Table.\r | |
| 84 | \r | |
| 85 | @retval EFI_SUCCESS The constructor always returns EFI_SUCCESS.\r | |
| 86 | \r | |
| 87 | **/\r | |
| 88 | EFI_STATUS\r | |
| 89 | EFIAPI\r | |
| 90 | LibInitializeResetSystem (\r | |
| 91 | IN EFI_HANDLE ImageHandle,\r | |
| 92 | IN EFI_SYSTEM_TABLE *SystemTable\r | |
| 93 | )\r | |
| 94 | {\r | |
| 95 | return EFI_SUCCESS;\r | |
| 96 | }\r |