/** @file
|
Reset System Library functions for OVMF
|
|
Copyright (c) 2006 - 2019, Intel Corporation. All rights reserved.<BR>
|
SPDX-License-Identifier: BSD-2-Clause-Patent
|
|
**/
|
|
#include <Base.h> // BIT1
|
|
#include <Library/BaseLib.h> // CpuDeadLoop()
|
#include <Library/DebugLib.h> // ASSERT()
|
#include <Library/IoLib.h> // IoWrite8()
|
#include <Library/ResetSystemLib.h> // ResetCold()
|
#include <Library/TimerLib.h> // MicroSecondDelay()
|
#include <Library/UefiRuntimeLib.h> // EfiGoneVirtual()
|
#include <OvmfPlatforms.h> // PIIX4_PMBA_VALUE
|
|
static UINTN MicrovmGedBase (VOID)
|
{
|
VOID *Address = (VOID*) MICROVM_GED_MMIO_BASE_REGS;
|
|
if (EfiGoneVirtual ()) {
|
EfiConvertPointer (0, &Address);
|
DEBUG ((DEBUG_INFO, "%a: virtual -> 0x%x\n", __FUNCTION__, Address));
|
} else {
|
DEBUG ((DEBUG_INFO, "%a: physical -> 0x%x\n", __FUNCTION__, Address));
|
}
|
|
return (UINTN) Address;
|
}
|
|
static VOID MicrovmReset (VOID)
|
{
|
UINTN Address = MicrovmGedBase();
|
|
DEBUG ((DEBUG_INFO, "%a: microvm reset via ged\n", __FUNCTION__));
|
MmioWrite8 (Address + MICROVM_ACPI_GED_REG_RESET,
|
MICROVM_ACPI_GED_RESET_VALUE);
|
CpuDeadLoop ();
|
}
|
|
static VOID MicrovmShutdown (VOID)
|
{
|
UINTN Address = MicrovmGedBase();
|
|
DEBUG ((DEBUG_INFO, "%a: microvm poweroff via ged\n", __FUNCTION__));
|
MmioWrite8 (Address + MICROVM_ACPI_GED_REG_SLEEP_CTL,
|
(1 << 5) /* enable bit */ |
|
(5 << 2) /* typ == S5 */);
|
CpuDeadLoop ();
|
}
|
|
VOID EFIAPI ResetCold (VOID)
|
{
|
MicrovmReset();
|
}
|
|
VOID EFIAPI ResetWarm (VOID)
|
{
|
MicrovmReset();
|
}
|
|
VOID
|
EFIAPI
|
ResetPlatformSpecific (
|
IN UINTN DataSize,
|
IN VOID *ResetData
|
)
|
{
|
MicrovmReset();
|
}
|
|
VOID
|
EFIAPI
|
ResetSystem (
|
IN EFI_RESET_TYPE ResetType,
|
IN EFI_STATUS ResetStatus,
|
IN UINTN DataSize,
|
IN VOID *ResetData OPTIONAL
|
)
|
{
|
MicrovmReset();
|
}
|
|
VOID EFIAPI ResetShutdown (VOID)
|
{
|
MicrovmShutdown();
|
}
|
