mirror of https://github.com/acidanthera/audk.git
133 lines
3.6 KiB
C
133 lines
3.6 KiB
C
/** @file
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ResetSystemLib implementation using PSCI calls
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Copyright (c) 2017, Linaro Ltd. All rights reserved.<BR>
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This program and the accompanying materials
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are licensed and made available under the terms and conditions of the BSD License
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which accompanies this distribution. The full text of the license may be found at
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http://opensource.org/licenses/bsd-license.php
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THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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**/
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#include <PiDxe.h>
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#include <Library/ArmMmuLib.h>
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#include <Library/ArmSmcLib.h>
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#include <Library/BaseLib.h>
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#include <Library/DebugLib.h>
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#include <Library/ResetSystemLib.h>
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#include <Library/UefiBootServicesTableLib.h>
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#include <Library/UefiRuntimeLib.h>
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#include <IndustryStandard/ArmStdSmc.h>
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/**
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This function causes a system-wide reset (cold reset), in which
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all circuitry within the system returns to its initial state. This type of reset
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is asynchronous to system operation and operates without regard to
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cycle boundaries.
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If this function returns, it means that the system does not support cold reset.
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**/
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VOID
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EFIAPI
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ResetCold (
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VOID
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)
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{
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ARM_SMC_ARGS ArmSmcArgs;
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// Send a PSCI 0.2 SYSTEM_RESET command
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ArmSmcArgs.Arg0 = ARM_SMC_ID_PSCI_SYSTEM_RESET;
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ArmCallSmc (&ArmSmcArgs);
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}
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/**
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This function causes a system-wide initialization (warm reset), in which all processors
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are set to their initial state. Pending cycles are not corrupted.
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If this function returns, it means that the system does not support warm reset.
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**/
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VOID
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EFIAPI
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ResetWarm (
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VOID
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)
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{
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// Map a warm reset into a cold reset
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ResetCold ();
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}
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/**
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This function causes the system to enter a power state equivalent
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to the ACPI G2/S5 or G3 states.
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If this function returns, it means that the system does not support shutdown reset.
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**/
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VOID
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EFIAPI
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ResetShutdown (
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VOID
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)
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{
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ARM_SMC_ARGS ArmSmcArgs;
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// Send a PSCI 0.2 SYSTEM_OFF command
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ArmSmcArgs.Arg0 = ARM_SMC_ID_PSCI_SYSTEM_OFF;
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ArmCallSmc (&ArmSmcArgs);
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}
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/**
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This function causes the system to enter S3 and then wake up immediately.
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If this function returns, it means that the system does not support S3 feature.
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**/
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VOID
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EFIAPI
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EnterS3WithImmediateWake (
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VOID
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)
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{
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VOID (*Reset)(VOID);
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if (FeaturePcdGet (PcdArmReenterPeiForCapsuleWarmReboot) &&
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!EfiAtRuntime ()) {
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//
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// At boot time, we are the only core running, so we can implement the
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// immediate wake (which is used by capsule update) by disabling the MMU
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// and interrupts, and jumping to the PEI entry point.
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//
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Reset = (VOID (*)(VOID))(UINTN)FixedPcdGet64 (PcdFvBaseAddress);
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gBS->RaiseTPL (TPL_HIGH_LEVEL);
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ArmDisableMmu ();
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Reset ();
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}
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}
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/**
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This function causes a systemwide reset. The exact type of the reset is
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defined by the EFI_GUID that follows the Null-terminated Unicode string passed
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into ResetData. If the platform does not recognize the EFI_GUID in ResetData
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the platform must pick a supported reset type to perform.The platform may
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optionally log the parameters from any non-normal reset that occurs.
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@param[in] DataSize The size, in bytes, of ResetData.
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@param[in] ResetData The data buffer starts with a Null-terminated string,
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followed by the EFI_GUID.
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**/
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VOID
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EFIAPI
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ResetPlatformSpecific (
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IN UINTN DataSize,
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IN VOID *ResetData
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)
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{
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// Map the platform specific reset as reboot
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ResetCold ();
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}
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