b6d542e927
Move the ResetShutdown() definition to its own file. This will help us
introduce:
- a new library instance that is not broken in runtime modules (the
current library instance is broken in runtime modules),
- another new library instance for bhyve support.
While at it, squash AcpiPmControl() into ResetShutdown(), open-coding
SuspendType=0. This is justified because we've had no other callers for
AcpiPmControl() since commit 2d9950a2bf ("OvmfPkg: remove
EnterS3WithImmediateWake () from ResetSystemLib", 2020-01-10).
Tested with the "reset -s" UEFI shell command, on both i440fx and q35.
Cc: Ard Biesheuvel <ard.biesheuvel@arm.com>
Cc: Jordan Justen <jordan.l.justen@intel.com>
Cc: Philippe Mathieu-Daudé <philmd@redhat.com>
Cc: Rebecca Cran <rebecca@bsdio.com>
Ref: https://bugzilla.tianocore.org/show_bug.cgi?id=2675
Signed-off-by: Laszlo Ersek <lersek@redhat.com>
Message-Id: <20200417153751.7110-5-lersek@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: Ard Biesheuvel <ard.biesheuvel@arm.com>
Reviewed-by: Rebecca Cran <rebecca@bsdio.com>
121 lines
3.3 KiB
C
121 lines
3.3 KiB
C
/** @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/IoLib.h> // IoWrite8()
|
|
#include <Library/ResetSystemLib.h> // ResetCold()
|
|
#include <Library/TimerLib.h> // MicroSecondDelay()
|
|
|
|
/**
|
|
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 ();
|
|
}
|
|
|
|
|
|
/**
|
|
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 ();
|
|
}
|
|
|
|
/**
|
|
The ResetSystem function resets the entire platform.
|
|
|
|
@param[in] ResetType The type of reset to perform.
|
|
@param[in] ResetStatus The status code for the reset.
|
|
@param[in] DataSize The size, in bytes, of ResetData.
|
|
@param[in] ResetData For a ResetType of EfiResetCold, EfiResetWarm, or
|
|
EfiResetShutdown the data buffer starts with a
|
|
Null-terminated string, optionally followed by
|
|
additional binary data. The string is a description
|
|
that the caller may use to further indicate the
|
|
reason for the system reset.
|
|
**/
|
|
VOID
|
|
EFIAPI
|
|
ResetSystem (
|
|
IN EFI_RESET_TYPE ResetType,
|
|
IN EFI_STATUS ResetStatus,
|
|
IN UINTN DataSize,
|
|
IN VOID *ResetData OPTIONAL
|
|
)
|
|
{
|
|
switch (ResetType) {
|
|
case EfiResetWarm:
|
|
ResetWarm ();
|
|
break;
|
|
|
|
case EfiResetCold:
|
|
ResetCold ();
|
|
break;
|
|
|
|
case EfiResetShutdown:
|
|
ResetShutdown ();
|
|
break;
|
|
|
|
case EfiResetPlatformSpecific:
|
|
ResetPlatformSpecific (DataSize, ResetData);
|
|
break;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
}
|