OvmfPkg: remove 8254TimerDxe

8254TimerDxe is not used by any platforms at this point, remove it.

This patch removes mentions of the following CSM resources from the source
code:

- GUIDs (protocols or otherwise):
  - gEfiLegacy8259ProtocolGuid

- headers:
  - Protocol/Legacy8259.h

which extends the list of resources scheduled for removal to:

- GUIDs (protocols or otherwise):
  - gEfiLegacy8259ProtocolGuid

- headers:
  - Protocol/Legacy8259.h

Cc: Ard Biesheuvel <ardb+tianocore@kernel.org>
Cc: Gerd Hoffmann <kraxel@redhat.com>
Cc: Jiewen Yao <jiewen.yao@intel.com>
Ref: https://bugzilla.tianocore.org/show_bug.cgi?id=4588
Signed-off-by: Laszlo Ersek <lersek@redhat.com>
Message-Id: <20231110235820.644381-33-lersek@redhat.com>
Reviewed-by: Jiewen Yao <Jiewen.yao@intel.com>
Reviewed-by: Ard Biesheuvel <ardb@kernel.org>
Acked-by: Corvin Köhne <corvink@FreeBSD.org>
Acked-by: Gerd Hoffmann <kraxel@redhat.com>

5 files changed, 0 insertions, 665 deletions

diff --git a/OvmfPkg/8254TimerDxe/8254Timer.inf b/OvmfPkg/8254TimerDxe/8254Timer.inf
deleted file mode 100644
index 8fbab896f0..0000000000
--- a/OvmfPkg/8254TimerDxe/8254Timer.inf
+++ /dev/null
@@ -1,43 +0,0 @@
-## @file

-# 8254 timer driver that provides Timer Arch protocol.

-#

-# Copyright (c) 2005 - 2019, Intel Corporation. All rights reserved.<BR>

-# SPDX-License-Identifier: BSD-2-Clause-Patent

-#

-##

-

-[Defines]

-  INF_VERSION                    = 0x00010005

-  BASE_NAME                      = Timer

-  MODULE_UNI_FILE                = Timer.uni

-  FILE_GUID                      = C190FE35-44AA-41A1-8AEA-4947BC60E09D

-  MODULE_TYPE                    = DXE_DRIVER

-  VERSION_STRING                 = 1.0

-

-  ENTRY_POINT                    = TimerDriverInitialize

-

-[Packages]

-  MdePkg/MdePkg.dec

-  OvmfPkg/OvmfPkg.dec

-

-[LibraryClasses]

-  UefiBootServicesTableLib

-  BaseLib

-  DebugLib

-  NestedInterruptTplLib

-  UefiDriverEntryPoint

-  IoLib

-

-[Sources]

-  Timer.h

-  Timer.c

-

-[Protocols]

-  gEfiCpuArchProtocolGuid       ## CONSUMES

-  gEfiLegacy8259ProtocolGuid    ## CONSUMES

-  gEfiTimerArchProtocolGuid     ## PRODUCES

-

-[Depex]

-  gEfiCpuArchProtocolGuid AND gEfiLegacy8259ProtocolGuid

-[UserExtensions.TianoCore."ExtraFiles"]

-  TimerExtra.uni

diff --git a/OvmfPkg/8254TimerDxe/Timer.c b/OvmfPkg/8254TimerDxe/Timer.c
deleted file mode 100644
index 5382b01615..0000000000
--- a/OvmfPkg/8254TimerDxe/Timer.c
+++ /dev/null
@@ -1,406 +0,0 @@
-/** @file

-  Timer Architectural Protocol as defined in the DXE CIS

-

-Copyright (c) 2005 - 2018, Intel Corporation. All rights reserved.<BR>

-SPDX-License-Identifier: BSD-2-Clause-Patent

-

-**/

-

-#include <Library/NestedInterruptTplLib.h>

-

-#include "Timer.h"

-

-//

-// The handle onto which the Timer Architectural Protocol will be installed

-//

-EFI_HANDLE  mTimerHandle = NULL;

-

-//

-// The Timer Architectural Protocol that this driver produces

-//

-EFI_TIMER_ARCH_PROTOCOL  mTimer = {

-  TimerDriverRegisterHandler,

-  TimerDriverSetTimerPeriod,

-  TimerDriverGetTimerPeriod,

-  TimerDriverGenerateSoftInterrupt

-};

-

-//

-// Pointer to the CPU Architectural Protocol instance

-//

-EFI_CPU_ARCH_PROTOCOL  *mCpu;

-

-//

-// Pointer to the Legacy 8259 Protocol instance

-//

-EFI_LEGACY_8259_PROTOCOL  *mLegacy8259;

-

-//

-// The notification function to call on every timer interrupt.

-// A bug in the compiler prevents us from initializing this here.

-//

-EFI_TIMER_NOTIFY  mTimerNotifyFunction;

-

-//

-// The current period of the timer interrupt

-//

-volatile UINT64  mTimerPeriod = 0;

-

-//

-// Worker Functions

-//

-

-/**

-  Sets the counter value for Timer #0 in a legacy 8254 timer.

-

-  @param Count    The 16-bit counter value to program into Timer #0 of the legacy 8254 timer.

-**/

-VOID

-SetPitCount (

-  IN UINT16  Count

-  )

-{

-  IoWrite8 (TIMER_CONTROL_PORT, 0x36);

-  IoWrite8 (TIMER0_COUNT_PORT, (UINT8)(Count & 0xff));

-  IoWrite8 (TIMER0_COUNT_PORT, (UINT8)((Count >> 8) & 0xff));

-}

-

-/**

-  8254 Timer #0 Interrupt Handler.

-

-  @param InterruptType    The type of interrupt that occurred

-  @param SystemContext    A pointer to the system context when the interrupt occurred

-**/

-VOID

-EFIAPI

-TimerInterruptHandler (

-  IN EFI_EXCEPTION_TYPE  InterruptType,

-  IN EFI_SYSTEM_CONTEXT  SystemContext

-  )

-{

-  STATIC NESTED_INTERRUPT_STATE  NestedInterruptState;

-  EFI_TPL                        OriginalTPL;

-

-  OriginalTPL = NestedInterruptRaiseTPL ();

-

-  mLegacy8259->EndOfInterrupt (mLegacy8259, Efi8259Irq0);

-

-  if (mTimerNotifyFunction != NULL) {

-    //

-    // @bug : This does not handle missed timer interrupts

-    //

-    mTimerNotifyFunction (mTimerPeriod);

-  }

-

-  NestedInterruptRestoreTPL (OriginalTPL, SystemContext, &NestedInterruptState);

-}

-

-/**

-

-  This function registers the handler NotifyFunction so it is called every time

-  the timer interrupt fires.  It also passes the amount of time since the last

-  handler call to the NotifyFunction.  If NotifyFunction is NULL, then the

-  handler is unregistered.  If the handler is registered, then EFI_SUCCESS is

-  returned.  If the CPU does not support registering a timer interrupt handler,

-  then EFI_UNSUPPORTED is returned.  If an attempt is made to register a handler

-  when a handler is already registered, then EFI_ALREADY_STARTED is returned.

-  If an attempt is made to unregister a handler when a handler is not registered,

-  then EFI_INVALID_PARAMETER is returned.  If an error occurs attempting to

-  register the NotifyFunction with the timer interrupt, then EFI_DEVICE_ERROR

-  is returned.

-

-

-  @param This             The EFI_TIMER_ARCH_PROTOCOL instance.

-  @param NotifyFunction   The function to call when a timer interrupt fires.  This

-                          function executes at TPL_HIGH_LEVEL.  The DXE Core will

-                          register a handler for the timer interrupt, so it can know

-                          how much time has passed.  This information is used to

-                          signal timer based events.  NULL will unregister the handler.

-

-  @retval        EFI_SUCCESS            The timer handler was registered.

-  @retval        EFI_UNSUPPORTED        The platform does not support timer interrupts.

-  @retval        EFI_ALREADY_STARTED    NotifyFunction is not NULL, and a handler is already

-                                        registered.

-  @retval        EFI_INVALID_PARAMETER  NotifyFunction is NULL, and a handler was not

-                                        previously registered.

-  @retval        EFI_DEVICE_ERROR       The timer handler could not be registered.

-

-**/

-EFI_STATUS

-EFIAPI

-TimerDriverRegisterHandler (

-  IN EFI_TIMER_ARCH_PROTOCOL  *This,

-  IN EFI_TIMER_NOTIFY         NotifyFunction

-  )

-{

-  //

-  // Check for invalid parameters

-  //

-  if ((NotifyFunction == NULL) && (mTimerNotifyFunction == NULL)) {

-    return EFI_INVALID_PARAMETER;

-  }

-

-  if ((NotifyFunction != NULL) && (mTimerNotifyFunction != NULL)) {

-    return EFI_ALREADY_STARTED;

-  }

-

-  mTimerNotifyFunction = NotifyFunction;

-

-  return EFI_SUCCESS;

-}

-

-/**

-

-  This function adjusts the period of timer interrupts to the value specified

-  by TimerPeriod.  If the timer period is updated, then the selected timer

-  period is stored in EFI_TIMER.TimerPeriod, and EFI_SUCCESS is returned.  If

-  the timer hardware is not programmable, then EFI_UNSUPPORTED is returned.

-  If an error occurs while attempting to update the timer period, then the

-  timer hardware will be put back in its state prior to this call, and

-  EFI_DEVICE_ERROR is returned.  If TimerPeriod is 0, then the timer interrupt

-  is disabled.  This is not the same as disabling the CPU's interrupts.

-  Instead, it must either turn off the timer hardware, or it must adjust the

-  interrupt controller so that a CPU interrupt is not generated when the timer

-  interrupt fires.

-

-

-  @param This            The EFI_TIMER_ARCH_PROTOCOL instance.

-  @param TimerPeriod     The rate to program the timer interrupt in 100 nS units.  If

-                         the timer hardware is not programmable, then EFI_UNSUPPORTED is

-                         returned.  If the timer is programmable, then the timer period

-                         will be rounded up to the nearest timer period that is supported

-                         by the timer hardware.  If TimerPeriod is set to 0, then the

-                         timer interrupts will be disabled.

-

-  @retval        EFI_SUCCESS       The timer period was changed.

-  @retval        EFI_UNSUPPORTED   The platform cannot change the period of the timer interrupt.

-  @retval        EFI_DEVICE_ERROR  The timer period could not be changed due to a device error.

-

-**/

-EFI_STATUS

-EFIAPI

-TimerDriverSetTimerPeriod (

-  IN EFI_TIMER_ARCH_PROTOCOL  *This,

-  IN UINT64                   TimerPeriod

-  )

-{

-  UINT64  TimerCount;

-

-  //

-  //  The basic clock is 1.19318 MHz or 0.119318 ticks per 100 ns.

-  //  TimerPeriod * 0.119318 = 8254 timer divisor. Using integer arithmetic

-  //  TimerCount = (TimerPeriod * 119318)/1000000.

-  //

-  //  Round up to next highest integer. This guarantees that the timer is

-  //  equal to or slightly longer than the requested time.

-  //  TimerCount = ((TimerPeriod * 119318) + 500000)/1000000

-  //

-  // Note that a TimerCount of 0 is equivalent to a count of 65,536

-  //

-  // Since TimerCount is limited to 16 bits for IA32, TimerPeriod is limited

-  // to 20 bits.

-  //

-  if (TimerPeriod == 0) {

-    //

-    // Disable timer interrupt for a TimerPeriod of 0

-    //

-    mLegacy8259->DisableIrq (mLegacy8259, Efi8259Irq0);

-  } else {

-    //

-    // Convert TimerPeriod into 8254 counts

-    //

-    TimerCount = DivU64x32 (MultU64x32 (119318, (UINT32)TimerPeriod) + 500000, 1000000);

-

-    //

-    // Check for overflow

-    //

-    if (TimerCount >= 65536) {

-      TimerCount  = 0;

-      TimerPeriod = MAX_TIMER_TICK_DURATION;

-    }

-

-    //

-    // Program the 8254 timer with the new count value

-    //

-    SetPitCount ((UINT16)TimerCount);

-

-    //

-    // Enable timer interrupt

-    //

-    mLegacy8259->EnableIrq (mLegacy8259, Efi8259Irq0, FALSE);

-  }

-

-  //

-  // Save the new timer period

-  //

-  mTimerPeriod = TimerPeriod;

-

-  return EFI_SUCCESS;

-}

-

-/**

-

-  This function retrieves the period of timer interrupts in 100 ns units,

-  returns that value in TimerPeriod, and returns EFI_SUCCESS.  If TimerPeriod

-  is NULL, then EFI_INVALID_PARAMETER is returned.  If a TimerPeriod of 0 is

-  returned, then the timer is currently disabled.

-

-

-  @param This            The EFI_TIMER_ARCH_PROTOCOL instance.

-  @param TimerPeriod     A pointer to the timer period to retrieve in 100 ns units.  If

-                         0 is returned, then the timer is currently disabled.

-

-  @retval EFI_SUCCESS            The timer period was returned in TimerPeriod.

-  @retval EFI_INVALID_PARAMETER  TimerPeriod is NULL.

-

-**/

-EFI_STATUS

-EFIAPI

-TimerDriverGetTimerPeriod (

-  IN EFI_TIMER_ARCH_PROTOCOL  *This,

-  OUT UINT64                  *TimerPeriod

-  )

-{

-  if (TimerPeriod == NULL) {

-    return EFI_INVALID_PARAMETER;

-  }

-

-  *TimerPeriod = mTimerPeriod;

-

-  return EFI_SUCCESS;

-}

-

-/**

-

-  This function generates a soft timer interrupt. If the platform does not support soft

-  timer interrupts, then EFI_UNSUPPORTED is returned. Otherwise, EFI_SUCCESS is returned.

-  If a handler has been registered through the EFI_TIMER_ARCH_PROTOCOL.RegisterHandler()

-  service, then a soft timer interrupt will be generated. If the timer interrupt is

-  enabled when this service is called, then the registered handler will be invoked. The

-  registered handler should not be able to distinguish a hardware-generated timer

-  interrupt from a software-generated timer interrupt.

-

-

-  @param This              The EFI_TIMER_ARCH_PROTOCOL instance.

-

-  @retval EFI_SUCCESS       The soft timer interrupt was generated.

-  @retval EFI_UNSUPPORTED   The platform does not support the generation of soft timer interrupts.

-

-**/

-EFI_STATUS

-EFIAPI

-TimerDriverGenerateSoftInterrupt (

-  IN EFI_TIMER_ARCH_PROTOCOL  *This

-  )

-{

-  EFI_STATUS  Status;

-  UINT16      IRQMask;

-  EFI_TPL     OriginalTPL;

-

-  //

-  // If the timer interrupt is enabled, then the registered handler will be invoked.

-  //

-  Status = mLegacy8259->GetMask (mLegacy8259, NULL, NULL, &IRQMask, NULL);

-  ASSERT_EFI_ERROR (Status);

-  if ((IRQMask & 0x1) == 0) {

-    //

-    // Invoke the registered handler

-    //

-    OriginalTPL = gBS->RaiseTPL (TPL_HIGH_LEVEL);

-

-    if (mTimerNotifyFunction != NULL) {

-      //

-      // @bug : This does not handle missed timer interrupts

-      //

-      mTimerNotifyFunction (mTimerPeriod);

-    }

-

-    gBS->RestoreTPL (OriginalTPL);

-  } else {

-    return EFI_UNSUPPORTED;

-  }

-

-  return EFI_SUCCESS;

-}

-

-/**

-  Initialize the Timer Architectural Protocol driver

-

-  @param ImageHandle     ImageHandle of the loaded driver

-  @param SystemTable     Pointer to the System Table

-

-  @retval EFI_SUCCESS            Timer Architectural Protocol created

-  @retval EFI_OUT_OF_RESOURCES   Not enough resources available to initialize driver.

-  @retval EFI_DEVICE_ERROR       A device error occurred attempting to initialize the driver.

-

-**/

-EFI_STATUS

-EFIAPI

-TimerDriverInitialize (

-  IN EFI_HANDLE        ImageHandle,

-  IN EFI_SYSTEM_TABLE  *SystemTable

-  )

-{

-  EFI_STATUS  Status;

-  UINT32      TimerVector;

-

-  //

-  // Initialize the pointer to our notify function.

-  //

-  mTimerNotifyFunction = NULL;

-

-  //

-  // Make sure the Timer Architectural Protocol is not already installed in the system

-  //

-  ASSERT_PROTOCOL_ALREADY_INSTALLED (NULL, &gEfiTimerArchProtocolGuid);

-

-  //

-  // Find the CPU architectural protocol.

-  //

-  Status = gBS->LocateProtocol (&gEfiCpuArchProtocolGuid, NULL, (VOID **)&mCpu);

-  ASSERT_EFI_ERROR (Status);

-

-  //

-  // Find the Legacy8259 protocol.

-  //

-  Status = gBS->LocateProtocol (&gEfiLegacy8259ProtocolGuid, NULL, (VOID **)&mLegacy8259);

-  ASSERT_EFI_ERROR (Status);

-

-  //

-  // Force the timer to be disabled

-  //

-  Status = TimerDriverSetTimerPeriod (&mTimer, 0);

-  ASSERT_EFI_ERROR (Status);

-

-  //

-  // Get the interrupt vector number corresponding to IRQ0 from the 8259 driver

-  //

-  TimerVector = 0;

-  Status      = mLegacy8259->GetVector (mLegacy8259, Efi8259Irq0, (UINT8 *)&TimerVector);

-  ASSERT_EFI_ERROR (Status);

-

-  //

-  // Install interrupt handler for 8254 Timer #0 (ISA IRQ0)

-  //

-  Status = mCpu->RegisterInterruptHandler (mCpu, TimerVector, TimerInterruptHandler);

-  ASSERT_EFI_ERROR (Status);

-

-  //

-  // Force the timer to be enabled at its default period

-  //

-  Status = TimerDriverSetTimerPeriod (&mTimer, DEFAULT_TIMER_TICK_DURATION);

-  ASSERT_EFI_ERROR (Status);

-

-  //

-  // Install the Timer Architectural Protocol onto a new handle

-  //

-  Status = gBS->InstallMultipleProtocolInterfaces (

-                  &mTimerHandle,

-                  &gEfiTimerArchProtocolGuid,

-                  &mTimer,

-                  NULL

-                  );

-  ASSERT_EFI_ERROR (Status);

-

-  return Status;

-}

diff --git a/OvmfPkg/8254TimerDxe/Timer.h b/OvmfPkg/8254TimerDxe/Timer.h
deleted file mode 100644
index b19ef3c1f9..0000000000
--- a/OvmfPkg/8254TimerDxe/Timer.h
+++ /dev/null
@@ -1,186 +0,0 @@
-/** @file

-  Private data structures

-

-Copyright (c) 2005 - 2018, Intel Corporation. All rights reserved.<BR>

-SPDX-License-Identifier: BSD-2-Clause-Patent

-**/

-

-#ifndef _TIMER_H_

-#define _TIMER_H_

-

-#include <PiDxe.h>

-

-#include <Protocol/Cpu.h>

-#include <Protocol/Legacy8259.h>

-#include <Protocol/Timer.h>

-

-#include <Library/UefiBootServicesTableLib.h>

-#include <Library/BaseLib.h>

-#include <Library/DebugLib.h>

-#include <Library/IoLib.h>

-

-//

-// The PCAT 8253/8254 has an input clock at 1.193182 MHz and Timer 0 is

-// initialized as a 16 bit free running counter that generates an interrupt(IRQ0)

-// each time the counter rolls over.

-//

-//   65536 counts

-// ---------------- * 1,000,000 uS/S = 54925.4 uS = 549254 * 100 ns

-//   1,193,182 Hz

-//

-

-//

-// The maximum tick duration for 8254 timer

-//

-#define MAX_TIMER_TICK_DURATION  549254

-//

-// The default timer tick duration is set to 10 ms = 100000 100 ns units

-//

-#define DEFAULT_TIMER_TICK_DURATION  100000

-#define TIMER_CONTROL_PORT           0x43

-#define TIMER0_COUNT_PORT            0x40

-

-//

-// Function Prototypes

-//

-

-/**

-  Initialize the Timer Architectural Protocol driver

-

-  @param ImageHandle     ImageHandle of the loaded driver

-  @param SystemTable     Pointer to the System Table

-

-  @retval EFI_SUCCESS            Timer Architectural Protocol created

-  @retval EFI_OUT_OF_RESOURCES   Not enough resources available to initialize driver.

-  @retval EFI_DEVICE_ERROR       A device error occurred attempting to initialize the driver.

-

-**/

-EFI_STATUS

-EFIAPI

-TimerDriverInitialize (

-  IN EFI_HANDLE        ImageHandle,

-  IN EFI_SYSTEM_TABLE  *SystemTable

-  )

-;

-

-/**

-

-  This function adjusts the period of timer interrupts to the value specified

-  by TimerPeriod.  If the timer period is updated, then the selected timer

-  period is stored in EFI_TIMER.TimerPeriod, and EFI_SUCCESS is returned.  If

-  the timer hardware is not programmable, then EFI_UNSUPPORTED is returned.

-  If an error occurs while attempting to update the timer period, then the

-  timer hardware will be put back in its state prior to this call, and

-  EFI_DEVICE_ERROR is returned.  If TimerPeriod is 0, then the timer interrupt

-  is disabled.  This is not the same as disabling the CPU's interrupts.

-  Instead, it must either turn off the timer hardware, or it must adjust the

-  interrupt controller so that a CPU interrupt is not generated when the timer

-  interrupt fires.

-

-

-  @param This            The EFI_TIMER_ARCH_PROTOCOL instance.

-  @param NotifyFunction  The rate to program the timer interrupt in 100 nS units.  If

-                         the timer hardware is not programmable, then EFI_UNSUPPORTED is

-                         returned.  If the timer is programmable, then the timer period

-                         will be rounded up to the nearest timer period that is supported

-                         by the timer hardware.  If TimerPeriod is set to 0, then the

-                         timer interrupts will be disabled.

-

-  @retval        EFI_SUCCESS       The timer period was changed.

-  @retval        EFI_UNSUPPORTED   The platform cannot change the period of the timer interrupt.

-  @retval        EFI_DEVICE_ERROR  The timer period could not be changed due to a device error.

-

-**/

-EFI_STATUS

-EFIAPI

-TimerDriverRegisterHandler (

-  IN EFI_TIMER_ARCH_PROTOCOL  *This,

-  IN EFI_TIMER_NOTIFY         NotifyFunction

-  )

-;

-

-/**

-

-  This function adjusts the period of timer interrupts to the value specified

-  by TimerPeriod.  If the timer period is updated, then the selected timer

-  period is stored in EFI_TIMER.TimerPeriod, and EFI_SUCCESS is returned.  If

-  the timer hardware is not programmable, then EFI_UNSUPPORTED is returned.

-  If an error occurs while attempting to update the timer period, then the

-  timer hardware will be put back in its state prior to this call, and

-  EFI_DEVICE_ERROR is returned.  If TimerPeriod is 0, then the timer interrupt

-  is disabled.  This is not the same as disabling the CPU's interrupts.

-  Instead, it must either turn off the timer hardware, or it must adjust the

-  interrupt controller so that a CPU interrupt is not generated when the timer

-  interrupt fires.

-

-

-  @param This            The EFI_TIMER_ARCH_PROTOCOL instance.

-  @param TimerPeriod     The rate to program the timer interrupt in 100 nS units.  If

-                         the timer hardware is not programmable, then EFI_UNSUPPORTED is

-                         returned.  If the timer is programmable, then the timer period

-                         will be rounded up to the nearest timer period that is supported

-                         by the timer hardware.  If TimerPeriod is set to 0, then the

-                         timer interrupts will be disabled.

-

-  @retval        EFI_SUCCESS       The timer period was changed.

-  @retval        EFI_UNSUPPORTED   The platform cannot change the period of the timer interrupt.

-  @retval        EFI_DEVICE_ERROR  The timer period could not be changed due to a device error.

-

-**/

-EFI_STATUS

-EFIAPI

-TimerDriverSetTimerPeriod (

-  IN EFI_TIMER_ARCH_PROTOCOL  *This,

-  IN UINT64                   TimerPeriod

-  )

-;

-

-/**

-

-  This function retrieves the period of timer interrupts in 100 ns units,

-  returns that value in TimerPeriod, and returns EFI_SUCCESS.  If TimerPeriod

-  is NULL, then EFI_INVALID_PARAMETER is returned.  If a TimerPeriod of 0 is

-  returned, then the timer is currently disabled.

-

-

-  @param This            The EFI_TIMER_ARCH_PROTOCOL instance.

-  @param TimerPeriod     A pointer to the timer period to retrieve in 100 ns units.  If

-                         0 is returned, then the timer is currently disabled.

-

-  @retval EFI_SUCCESS            The timer period was returned in TimerPeriod.

-  @retval EFI_INVALID_PARAMETER  TimerPeriod is NULL.

-

-**/

-EFI_STATUS

-EFIAPI

-TimerDriverGetTimerPeriod (

-  IN EFI_TIMER_ARCH_PROTOCOL  *This,

-  OUT UINT64                  *TimerPeriod

-  )

-;

-

-/**

-

-  This function generates a soft timer interrupt. If the platform does not support soft

-  timer interrupts, then EFI_UNSUPPORTED is returned. Otherwise, EFI_SUCCESS is returned.

-  If a handler has been registered through the EFI_TIMER_ARCH_PROTOCOL.RegisterHandler()

-  service, then a soft timer interrupt will be generated. If the timer interrupt is

-  enabled when this service is called, then the registered handler will be invoked. The

-  registered handler should not be able to distinguish a hardware-generated timer

-  interrupt from a software-generated timer interrupt.

-

-

-  @param This              The EFI_TIMER_ARCH_PROTOCOL instance.

-

-  @retval EFI_SUCCESS       The soft timer interrupt was generated.

-  @retval EFI_UNSUPPORTED   The platform does not support the generation of soft timer interrupts.

-

-**/

-EFI_STATUS

-EFIAPI

-TimerDriverGenerateSoftInterrupt (

-  IN EFI_TIMER_ARCH_PROTOCOL  *This

-  )

-;

-

-#endif

diff --git a/OvmfPkg/8254TimerDxe/Timer.uni b/OvmfPkg/8254TimerDxe/Timer.uni
deleted file mode 100644
index 7f3d35f4e1..0000000000
--- a/OvmfPkg/8254TimerDxe/Timer.uni
+++ /dev/null
@@ -1,16 +0,0 @@
-// /** @file

-// 8254 timer driver that provides Timer Arch protocol.

-//

-// 8254 timer driver that provides Timer Arch protocol.

-//

-// Copyright (c) 2005 - 2018, Intel Corporation. All rights reserved.<BR>

-//

-// SPDX-License-Identifier: BSD-2-Clause-Patent

-//

-// **/

-

-

-#string STR_MODULE_ABSTRACT             #language en-US "8254 timer driver that provides Timer Arch protocol"

-

-#string STR_MODULE_DESCRIPTION          #language en-US "8254 timer driver that provides Timer Arch protocol."

-

diff --git a/OvmfPkg/8254TimerDxe/TimerExtra.uni b/OvmfPkg/8254TimerDxe/TimerExtra.uni
deleted file mode 100644
index 7a54767a45..0000000000
--- a/OvmfPkg/8254TimerDxe/TimerExtra.uni
+++ /dev/null
@@ -1,14 +0,0 @@
-// /** @file

-// Timer Localized Strings and Content

-//

-// Copyright (c) 2013 - 2018, Intel Corporation. All rights reserved.<BR>

-//

-// SPDX-License-Identifier: BSD-2-Clause-Patent

-//

-// **/

-

-#string STR_PROPERTIES_MODULE_NAME

-#language en-US

-"8254 Timer DXE Driver"

-

-