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/** @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 *)(UINTN)MICROVM_GED_MMIO_BASE_REGS;
if (EfiGoneVirtual ()) {
EfiConvertPointer (0, &Address);
DEBUG ((DEBUG_INFO, "%a: virtual -> 0x%x\n", __func__, Address));
} else {
DEBUG ((DEBUG_INFO, "%a: physical -> 0x%x\n", __func__, Address));
}
return (UINTN)Address;
}
static VOID
MicrovmReset (
VOID
)
{
UINTN Address = MicrovmGedBase ();
DEBUG ((DEBUG_INFO, "%a: microvm reset via ged\n", __func__));
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", __func__));
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 ();
}
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