| Vishal Bhoj | 82c8071 | 2015-12-15 21:13:33 +0530 | [diff] [blame^] | 1 | /** @file
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| 2 | Support ResetSystem Runtime call using PSCI calls
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| 3 |
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| 4 | Note: A similar library is implemented in
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| 5 | ArmPlatformPkg/ArmVirtualizationPkg/Library/ArmVirtualizationPsciResetSystemLib
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| 6 | So similar issues might exist in this implementation too.
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| 7 |
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| 8 | Copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR>
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| 9 | Copyright (c) 2013-2014, ARM Ltd. All rights reserved.<BR>
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| 10 | Copyright (c) 2014, Linaro Ltd. All rights reserved.<BR>
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| 11 |
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| 12 | This program and the accompanying materials
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| 13 | are licensed and made available under the terms and conditions of the BSD License
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| 14 | which accompanies this distribution. The full text of the license may be found at
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| 15 | http://opensource.org/licenses/bsd-license.php
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| 16 |
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| 17 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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| 18 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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| 19 |
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| 20 | **/
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| 21 |
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| 22 | #include <PiDxe.h>
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| 23 |
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| 24 | #include <Library/BaseLib.h>
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| 25 | #include <Library/DebugLib.h>
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| 26 | #include <Library/EfiResetSystemLib.h>
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| 27 | #include <Library/ArmSmcLib.h>
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| 28 |
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| 29 | #include <IndustryStandard/ArmStdSmc.h>
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| 30 |
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| 31 | /**
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| 32 | Resets the entire platform.
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| 33 |
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| 34 | @param ResetType The type of reset to perform.
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| 35 | @param ResetStatus The status code for the reset.
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| 36 | @param DataSize The size, in bytes, of WatchdogData.
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| 37 | @param ResetData For a ResetType of EfiResetCold, EfiResetWarm, or
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| 38 | EfiResetShutdown the data buffer starts with a Null-terminated
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| 39 | Unicode string, optionally followed by additional binary data.
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| 40 |
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| 41 | **/
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| 42 | EFI_STATUS
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| 43 | EFIAPI
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| 44 | LibResetSystem (
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| 45 | IN EFI_RESET_TYPE ResetType,
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| 46 | IN EFI_STATUS ResetStatus,
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| 47 | IN UINTN DataSize,
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| 48 | IN CHAR16 *ResetData OPTIONAL
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| 49 | )
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| 50 | {
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| 51 | ARM_SMC_ARGS ArmSmcArgs;
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| 52 |
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| 53 | switch (ResetType) {
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| 54 | case EfiResetPlatformSpecific:
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| 55 | // Map the platform specific reset as reboot
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| 56 | case EfiResetWarm:
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| 57 | // Map a warm reset into a cold reset
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| 58 | case EfiResetCold:
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| 59 | // Send a PSCI 0.2 SYSTEM_RESET command
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| 60 | ArmSmcArgs.Arg0 = ARM_SMC_ID_PSCI_SYSTEM_RESET;
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| 61 | break;
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| 62 | case EfiResetShutdown:
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| 63 | // Send a PSCI 0.2 SYSTEM_OFF command
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| 64 | ArmSmcArgs.Arg0 = ARM_SMC_ID_PSCI_SYSTEM_OFF;
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| 65 | break;
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| 66 | default:
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| 67 | ASSERT (FALSE);
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| 68 | return EFI_UNSUPPORTED;
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| 69 | }
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| 70 |
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| 71 | ArmCallSmc (&ArmSmcArgs);
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| 72 |
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| 73 | // We should never be here
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| 74 | DEBUG ((EFI_D_ERROR, "%a: PSCI Reset failed\n", __FUNCTION__));
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| 75 | CpuDeadLoop ();
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| 76 | return EFI_UNSUPPORTED;
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| 77 | }
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| 78 |
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| 79 | /**
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| 80 | Initialize any infrastructure required for LibResetSystem () to function.
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| 81 |
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| 82 | @param ImageHandle The firmware allocated handle for the EFI image.
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| 83 | @param SystemTable A pointer to the EFI System Table.
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| 84 |
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| 85 | @retval EFI_SUCCESS The constructor always returns EFI_SUCCESS.
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| 86 |
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| 87 | **/
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| 88 | EFI_STATUS
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| 89 | EFIAPI
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| 90 | LibInitializeResetSystem (
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| 91 | IN EFI_HANDLE ImageHandle,
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| 92 | IN EFI_SYSTEM_TABLE *SystemTable
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| 93 | )
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| 94 | {
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| 95 | return EFI_SUCCESS;
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| 96 | }
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