mirror of
https://github.com/CloverHackyColor/CloverBootloader.git
synced 2024-11-23 11:35:19 +01:00
186 lines
6.8 KiB
C
186 lines
6.8 KiB
C
/** @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
|