mirror of
https://github.com/LadybirdBrowser/ladybird.git
synced 2024-11-13 01:59:14 +03:00
63 lines
1.9 KiB
C++
63 lines
1.9 KiB
C++
/*
|
|
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions are met:
|
|
*
|
|
* 1. Redistributions of source code must retain the above copyright notice, this
|
|
* list of conditions and the following disclaimer.
|
|
*
|
|
* 2. Redistributions in binary form must reproduce the above copyright notice,
|
|
* this list of conditions and the following disclaimer in the documentation
|
|
* and/or other materials provided with the distribution.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
|
|
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
|
|
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
|
|
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
|
|
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
|
|
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
|
|
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*/
|
|
|
|
#pragma once
|
|
|
|
#include <AK/Types.h>
|
|
|
|
namespace Kernel {
|
|
|
|
#define TICKS_PER_SECOND 1000
|
|
/* Timer related ports */
|
|
#define TIMER0_CTL 0x40
|
|
#define TIMER1_CTL 0x41
|
|
#define TIMER2_CTL 0x42
|
|
#define PIT_CTL 0x43
|
|
|
|
/* Building blocks for PIT_CTL */
|
|
#define TIMER0_SELECT 0x00
|
|
#define TIMER1_SELECT 0x40
|
|
#define TIMER2_SELECT 0x80
|
|
|
|
#define MODE_COUNTDOWN 0x00
|
|
#define MODE_ONESHOT 0x02
|
|
#define MODE_RATE 0x04
|
|
#define MODE_SQUARE_WAVE 0x06
|
|
|
|
#define WRITE_WORD 0x30
|
|
|
|
#define BASE_FREQUENCY 1193182
|
|
|
|
namespace PIT {
|
|
|
|
void initialize();
|
|
u32 ticks_this_second();
|
|
u32 seconds_since_boot();
|
|
|
|
}
|
|
|
|
}
|