/** @file Reset System Library functions for OVMF Copyright (c) 2006 - 2016, Intel Corporation. All rights reserved.<BR> This program and the accompanying materials are licensed and made available under the terms and conditions of the BSD License which accompanies this distribution. The full text of the license may be found at http://opensource.org/licenses/bsd-license.php THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. **/ #include <Base.h> #include <Library/BaseLib.h> #include <Library/DebugLib.h> #include <Library/IoLib.h> #include <Library/TimerLib.h> #include <OvmfPlatforms.h> #include <OvmfPlatforms.h> VOID AcpiPmControl ( UINTN SuspendType ) { UINT16 AcpiPmBaseAddress; UINT16 HostBridgeDevId; ASSERT (SuspendType < 6); AcpiPmBaseAddress = 0; HostBridgeDevId = PciRead16 (OVMF_HOSTBRIDGE_DID); switch (HostBridgeDevId) { case INTEL_82441_DEVICE_ID: AcpiPmBaseAddress = PIIX4_PMBA_VALUE; break; case INTEL_Q35_MCH_DEVICE_ID: AcpiPmBaseAddress = ICH9_PMBASE_VALUE; break; default: ASSERT (FALSE); CpuDeadLoop (); } IoBitFieldWrite16 (AcpiPmBaseAddress + 4, 10, 13, (UINT16) SuspendType); IoOr16 (AcpiPmBaseAddress + 4, BIT13); CpuDeadLoop (); } /** Calling this function causes a system-wide reset. This sets all circuitry within the system to its initial state. This type of reset is asynchronous to system operation and operates without regard to cycle boundaries. System reset should not return, if it returns, it means the system does not support cold reset. **/ VOID EFIAPI ResetCold ( VOID ) { IoWrite8 (0xCF9, BIT2 | BIT1); // 1st choice: PIIX3 RCR, RCPU|SRST MicroSecondDelay (50); IoWrite8 (0x64, 0xfe); // 2nd choice: keyboard controller CpuDeadLoop (); } /** Calling this function causes a system-wide initialization. The processors are set to their initial state, and pending cycles are not corrupted. System reset should not return, if it returns, it means the system does not support warm reset. **/ VOID EFIAPI ResetWarm ( VOID ) { IoWrite8 (0x64, 0xfe); CpuDeadLoop (); } /** Calling this function causes the system to enter a power state equivalent to the ACPI G2/S5 or G3 states. System shutdown should not return, if it returns, it means the system does not support shut down reset. **/ VOID EFIAPI ResetShutdown ( VOID ) { AcpiPmControl (0); ASSERT (FALSE); } /** Calling this function causes the system to enter a power state for capsule update. Reset update should not return, if it returns, it means the system does not support capsule update. **/ VOID EFIAPI EnterS3WithImmediateWake ( VOID ) { AcpiPmControl (1); ASSERT (FALSE); } /** This function causes a systemwide reset. The exact type of the reset is defined by the EFI_GUID that follows the Null-terminated Unicode string passed into ResetData. If the platform does not recognize the EFI_GUID in ResetData the platform must pick a supported reset type to perform.The platform may optionally log the parameters from any non-normal reset that occurs. @param[in] DataSize The size, in bytes, of ResetData. @param[in] ResetData The data buffer starts with a Null-terminated string, followed by the EFI_GUID. **/ VOID EFIAPI ResetPlatformSpecific ( IN UINTN DataSize, IN VOID *ResetData ) { ResetCold (); }