mirror of
https://github.com/RGBCube/serenity
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046d6855f5
This makes the Scheduler a lot leaner by not having to evaluate block conditions every time it is invoked. Instead evaluate them as the states change, and unblock threads at that point. This also implements some more waitid/waitpid/wait features and behavior. For example, WUNTRACED and WNOWAIT are now supported. And wait will now not return EINTR when SIGCHLD is delivered at the same time.
414 lines
9.1 KiB
C++
414 lines
9.1 KiB
C++
/*
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* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <AK/Assertions.h>
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#include <AK/ByteBuffer.h>
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#include <AK/Singleton.h>
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#include <AK/StringView.h>
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#include <AK/Types.h>
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#include <Kernel/Arch/i386/CPU.h>
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#include <Kernel/Devices/KeyboardDevice.h>
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#include <Kernel/IO.h>
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#include <Kernel/TTY/VirtualConsole.h>
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//#define KEYBOARD_DEBUG
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namespace Kernel {
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#define IRQ_KEYBOARD 1
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static const KeyCode unshifted_key_map[0x80] = {
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Key_Invalid,
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Key_Escape,
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Key_1,
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Key_2,
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Key_3,
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Key_4,
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Key_5,
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Key_6,
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Key_7,
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Key_8,
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Key_9,
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Key_0,
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Key_Minus,
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Key_Equal,
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Key_Backspace,
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Key_Tab, //15
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Key_Q,
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Key_W,
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Key_E,
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Key_R,
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Key_T,
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Key_Y,
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Key_U,
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Key_I,
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Key_O,
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Key_P,
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Key_LeftBracket,
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Key_RightBracket,
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Key_Return, // 28
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Key_Control, // 29
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Key_A,
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Key_S,
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Key_D,
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Key_F,
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Key_G,
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Key_H,
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Key_J,
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Key_K,
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Key_L,
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Key_Semicolon,
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Key_Apostrophe,
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Key_Backtick,
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Key_LeftShift, // 42
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Key_Backslash,
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Key_Z,
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Key_X,
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Key_C,
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Key_V,
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Key_B,
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Key_N,
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Key_M,
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Key_Comma,
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Key_Period,
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Key_Slash,
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Key_RightShift, // 54
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Key_Asterisk,
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Key_Alt, // 56
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Key_Space, // 57
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Key_CapsLock, // 58
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Key_F1,
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Key_F2,
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Key_F3,
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Key_F4,
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Key_F5,
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Key_F6,
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Key_F7,
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Key_F8,
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Key_F9,
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Key_F10,
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Key_NumLock,
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Key_Invalid, // 70
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Key_Home,
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Key_Up,
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Key_PageUp,
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Key_Minus,
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Key_Left,
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Key_Invalid,
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Key_Right, // 77
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Key_Plus,
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Key_End,
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Key_Down, // 80
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Key_PageDown,
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Key_Invalid,
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Key_Delete, // 83
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Key_Invalid,
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Key_Invalid,
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Key_Backslash,
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Key_F11,
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Key_F12,
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Key_Invalid,
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Key_Invalid,
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Key_Logo,
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};
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static const KeyCode shifted_key_map[0x100] = {
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Key_Invalid,
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Key_Escape,
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Key_ExclamationPoint,
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Key_AtSign,
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Key_Hashtag,
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Key_Dollar,
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Key_Percent,
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Key_Circumflex,
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Key_Ampersand,
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Key_Asterisk,
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Key_LeftParen,
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Key_RightParen,
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Key_Underscore,
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Key_Plus,
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Key_Backspace,
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Key_Tab,
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Key_Q,
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Key_W,
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Key_E,
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Key_R,
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Key_T,
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Key_Y,
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Key_U,
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Key_I,
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Key_O,
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Key_P,
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Key_LeftBrace,
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Key_RightBrace,
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Key_Return,
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Key_Control,
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Key_A,
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Key_S,
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Key_D,
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Key_F,
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Key_G,
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Key_H,
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Key_J,
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Key_K,
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Key_L,
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Key_Colon,
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Key_DoubleQuote,
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Key_Tilde,
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Key_LeftShift, // 42
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Key_Pipe,
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Key_Z,
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Key_X,
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Key_C,
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Key_V,
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Key_B,
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Key_N,
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Key_M,
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Key_LessThan,
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Key_GreaterThan,
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Key_QuestionMark,
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Key_RightShift, // 54
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Key_Asterisk,
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Key_Alt,
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Key_Space, // 57
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Key_CapsLock, // 58
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Key_F1,
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Key_F2,
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Key_F3,
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Key_F4,
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Key_F5,
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Key_F6,
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Key_F7,
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Key_F8,
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Key_F9,
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Key_F10,
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Key_NumLock,
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Key_Invalid, // 70
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Key_Home,
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Key_Up,
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Key_PageUp,
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Key_Minus,
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Key_Left,
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Key_Invalid,
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Key_Right, // 77
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Key_Plus,
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Key_End,
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Key_Down, // 80
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Key_PageDown,
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Key_Invalid,
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Key_Delete, // 83
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Key_Invalid,
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Key_Invalid,
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Key_Pipe,
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Key_F11,
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Key_F12,
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Key_Invalid,
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Key_Invalid,
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Key_Logo,
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};
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static const KeyCode numpad_key_map[13] = { Key_7, Key_8, Key_9, Key_Invalid, Key_4, Key_5, Key_6, Key_Invalid, Key_1, Key_2, Key_3, Key_0, Key_Comma };
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void KeyboardDevice::key_state_changed(u8 scan_code, bool pressed)
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{
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KeyCode key = (m_modifiers & Mod_Shift) ? shifted_key_map[scan_code] : unshifted_key_map[scan_code];
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if (key == Key_NumLock && pressed)
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m_num_lock_on = !m_num_lock_on;
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if (m_num_lock_on && !m_has_e0_prefix) {
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if (scan_code >= 0x47 && scan_code <= 0x53) {
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u8 index = scan_code - 0x47;
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KeyCode newKey = numpad_key_map[index];
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if (newKey != Key_Invalid) {
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key = newKey;
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}
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}
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}
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if (key == Key_CapsLock && pressed)
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m_caps_lock_on = !m_caps_lock_on;
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Event event;
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event.key = key;
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event.scancode = m_has_e0_prefix ? 0xe000 + scan_code : scan_code;
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event.flags = m_modifiers;
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event.e0_prefix = m_has_e0_prefix;
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event.caps_lock_on = m_caps_lock_on;
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event.code_point = m_character_map.get_char(event);
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if (pressed)
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event.flags |= Is_Press;
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if (m_client)
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m_client->on_key_pressed(event);
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{
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ScopedSpinLock lock(m_queue_lock);
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m_queue.enqueue(event);
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}
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m_has_e0_prefix = false;
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evaluate_block_conditions();
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}
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void KeyboardDevice::handle_irq(const RegisterState&)
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{
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// The controller will read the data and call irq_handle_byte_read
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// for the appropriate device
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m_controller.irq_process_input_buffer(I8042Controller::Device::Keyboard);
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}
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void KeyboardDevice::irq_handle_byte_read(u8 byte)
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{
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u8 ch = byte & 0x7f;
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bool pressed = !(byte & 0x80);
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m_entropy_source.add_random_event(byte);
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if (byte == 0xe0) {
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m_has_e0_prefix = true;
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return;
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}
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#ifdef KEYBOARD_DEBUG
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dbg() << "Keyboard::irq_handle_byte_read: " << String::format("%b", ch) << " " << (pressed ? "down" : "up");
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#endif
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switch (ch) {
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case 0x38:
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if (m_has_e0_prefix)
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update_modifier(Mod_AltGr, pressed);
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else
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update_modifier(Mod_Alt, pressed);
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break;
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case 0x1d:
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update_modifier(Mod_Ctrl, pressed);
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break;
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case 0x5b:
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update_modifier(Mod_Logo, pressed);
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break;
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case 0x2a:
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case 0x36:
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update_modifier(Mod_Shift, pressed);
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break;
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}
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switch (ch) {
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case I8042_ACK:
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break;
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default:
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if (m_modifiers & Mod_Alt) {
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switch (ch) {
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case 0x02 ... 0x07: // 1 to 6
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VirtualConsole::switch_to(ch - 0x02);
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break;
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default:
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key_state_changed(ch, pressed);
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break;
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}
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} else {
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key_state_changed(ch, pressed);
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}
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}
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}
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static AK::Singleton<KeyboardDevice> s_the;
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KeyboardDevice& KeyboardDevice::the()
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{
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return *s_the;
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}
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KeyboardDevice::KeyboardDevice()
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: IRQHandler(IRQ_KEYBOARD)
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, CharacterDevice(85, 1)
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, m_controller(I8042Controller::the())
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{
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}
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KeyboardDevice::~KeyboardDevice()
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{
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}
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bool KeyboardDevice::initialize()
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{
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if (!m_controller.reset_device(I8042Controller::Device::Keyboard)) {
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dbg() << "KeyboardDevice: I8042 controller failed to reset device";
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return false;
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}
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return true;
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}
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bool KeyboardDevice::can_read(const FileDescription&, size_t) const
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{
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return !m_queue.is_empty();
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}
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KResultOr<size_t> KeyboardDevice::read(FileDescription&, size_t, UserOrKernelBuffer& buffer, size_t size)
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{
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size_t nread = 0;
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ScopedSpinLock lock(m_queue_lock);
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while (nread < size) {
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if (m_queue.is_empty())
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break;
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// Don't return partial data frames.
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if ((size - nread) < (ssize_t)sizeof(Event))
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break;
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auto event = m_queue.dequeue();
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lock.unlock();
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ssize_t n = buffer.write_buffered<sizeof(Event)>(sizeof(Event), [&](u8* data, size_t data_bytes) {
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memcpy(data, &event, sizeof(Event));
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return (ssize_t)data_bytes;
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});
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if (n < 0)
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return KResult(n);
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ASSERT((size_t)n == sizeof(Event));
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nread += sizeof(Event);
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lock.lock();
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}
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return nread;
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}
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KResultOr<size_t> KeyboardDevice::write(FileDescription&, size_t, const UserOrKernelBuffer&, size_t)
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{
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return 0;
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}
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KeyboardClient::~KeyboardClient()
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{
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}
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void KeyboardDevice::set_maps(const Keyboard::CharacterMapData& character_map_data, const String& character_map_name)
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{
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m_character_map.set_character_map_data(character_map_data);
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m_character_map.set_character_map_name(character_map_name);
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dbg() << "New Character map \"" << character_map_name << "\" passing to client.";
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}
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}
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