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https://github.com/Fennix-Project/Kernel.git
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Revamped kernel panic functions with significant improvements
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EnderIce2
388
core/panic/keyboard.cpp
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388
core/panic/keyboard.cpp
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/*
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This file is part of Fennix Kernel.
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Fennix Kernel is free software: you can redistribute it and/or
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modify it under the terms of the GNU General Public License as
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published by the Free Software Foundation, either version 3 of
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the License, or (at your option) any later version.
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Fennix Kernel is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with Fennix Kernel. If not, see <https://www.gnu.org/licenses/>.
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*/
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#include "keyboard.hpp"
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#include <display.hpp>
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#include <convert.h>
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#include <printf.h>
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#include <debug.h>
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#include <smp.hpp>
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#include <cpu.hpp>
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#include <io.h>
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#if defined(a64)
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#include "../../arch/amd64/cpu/gdt.hpp"
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#elif defined(a32)
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#elif defined(aa64)
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#endif
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#include "../../kernel.h"
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#define ERROR_COLOR "\eFF0000"
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#define WARN_COLOR "\eFFAA00"
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#define DEFAULT_COLOR "\e00FF00"
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extern void ExPrint(const char *Format, ...);
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extern void ArrowInput(uint8_t key);
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extern void UserInput(char *Input);
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const char sc_ascii_low[] = {'?', '?', '1', '2', '3', '4', '5', '6',
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'7', '8', '9', '0', '-', '=', '?', '?', 'q', 'w', 'e', 'r', 't', 'y',
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'u', 'i', 'o', 'p', '[', ']', '?', '?', 'a', 's', 'd', 'f', 'g',
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'h', 'j', 'k', 'l', ';', '\'', '`', '?', '\\', 'z', 'x', 'c', 'v',
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'b', 'n', 'm', ',', '.', '/', '?', '?', '?', ' '};
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const char sc_ascii_high[] = {'?', '?', '!', '@', '#', '$', '%', '^',
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'&', '*', '(', ')', '_', '+', '?', '?', 'Q', 'W', 'E', 'R', 'T', 'Y',
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'U', 'I', 'O', 'P', '{', '}', '?', '?', 'A', 'S', 'D', 'F', 'G',
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'H', 'J', 'K', 'L', ';', '\"', '~', '?', '|', 'Z', 'X', 'C', 'V',
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'B', 'N', 'M', '<', '>', '?', '?', '?', '?', ' '};
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static int LowerCase = true;
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nsa static inline int GetLetterFromScanCode(uint8_t ScanCode)
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{
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if (ScanCode & 0x80)
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{
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switch (ScanCode)
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{
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case KEY_U_LSHIFT:
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LowerCase = true;
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return KEY_INVALID;
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case KEY_U_RSHIFT:
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LowerCase = true;
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return KEY_INVALID;
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default:
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return KEY_INVALID;
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}
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}
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else
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{
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switch (ScanCode)
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{
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case KEY_D_RETURN:
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return '\n';
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case KEY_D_LSHIFT:
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LowerCase = false;
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return KEY_INVALID;
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case KEY_D_RSHIFT:
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LowerCase = false;
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return KEY_INVALID;
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case KEY_D_BACKSPACE:
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return ScanCode;
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default:
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{
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if (ScanCode > 0x39)
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break;
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if (LowerCase)
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return sc_ascii_low[ScanCode];
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else
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return sc_ascii_high[ScanCode];
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}
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}
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}
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return KEY_INVALID;
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}
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nsa void CrashKeyboardDriver::PS2Wait(bool Read)
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{
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TimeoutCallNumber++;
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#if defined(a86)
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int Timeout = 100000;
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uint8_t Status = 0;
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while (Timeout--)
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{
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Status = inb(0x64);
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if (Read)
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{
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if ((Status & 1) == 1)
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return;
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}
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else
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{
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if ((Status & 2) == 0)
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return;
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}
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}
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ExPrint(WARN_COLOR "PS/2 controller timeout (%s;%d)\n" DEFAULT_COLOR,
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Read ? "read" : "write", TimeoutCallNumber - 1);
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#endif // a86
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}
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/*
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This simple driver relies on the PS/2 controller to handle the keyboard.
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Maybe is not the most efficient way but most x86 devices out there
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still has PS/2 support (emulated or not).
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We even have to make sure IRQ1 is enabled in the PIC but on x64 we use
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the I/O APIC... "outb(0x21, 0b11111101);" can be used but the EOI is
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automatically sent to I/O APIC if enabled/supported which is bad.
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FIXME: On some real devices, the PS/2 keyboard doesn't send interrupts.
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TODO: Implement a way to handle USB keyboards in the future.
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*/
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CrashKeyboardDriver::CrashKeyboardDriver() : Interrupts::Handler(1) /* IRQ1 */
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{
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#define WaitRead PS2Wait(true)
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#define WaitWrite PS2Wait(false)
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#define SetMessageLocation \
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Display->SetBufferCursor(8, \
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Display->GetHeight - \
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Display->GetCurrentFont()->GetInfo().Height - 24)
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CPU::Interrupts(CPU::Disable);
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/* Dots will be printed at the bottom of the screen as a progress bar. */
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Display->SetBufferCursor(8,
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Display->GetHeight -
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Display->GetCurrentFont()->GetInfo().Height - 8);
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#if defined(a86)
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/* Disable port 1 & 2 */
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{
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/* Disable Port 1 */
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WaitWrite;
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outb(0x64, 0xAD);
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/* Disable Port 2 */
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WaitWrite;
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outb(0x64, 0xA7);
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}
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Display->Print('.');
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/* Flush */
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{
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int Timeout = 100000;
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while ((inb(0x64) & 1) && Timeout-- > 0)
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inb(0x60);
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if (Timeout <= 0)
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{
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SetMessageLocation;
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ExPrint(ERROR_COLOR
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"PS/2 controller timeout (flush;0)\n" DEFAULT_COLOR);
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CPU::Stop();
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}
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}
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Display->Print('.');
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/* Test controller */
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{
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/* Save config */
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WaitWrite;
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outb(0x64, 0x20);
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WaitRead;
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uint8_t cfg = inb(0x60);
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/* Test PS/2 controller */
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WaitWrite;
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outb(0x64, 0xAA);
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WaitRead;
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uint8_t test = inb(0x60);
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if (test != 0x55)
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{
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if (test == 0xFA)
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{
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trace("PS/2 controller sent ACK to test request.");
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WaitRead;
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test = inb(0x60);
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}
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if (test != 0x55)
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{
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SetMessageLocation;
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ExPrint(ERROR_COLOR
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"PS/2 controller self test failed (%#x)\n" DEFAULT_COLOR,
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test);
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CPU::Stop();
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}
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}
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/* Restore config */
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WaitWrite;
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outb(0x64, 0x60);
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WaitWrite;
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outb(0x60, cfg);
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}
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Display->Print('.');
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/* Disable scanning; Enable port 1; Set default settings */
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{
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/* Disable scanning */
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outb(0x60, 0xF5);
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/* Enable Port 1 */
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WaitWrite;
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outb(0x64, 0xAE);
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/* Set default settings */
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outb(0x60, 0xF6);
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}
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Display->Print('.');
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/* Test port 1 */
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{
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WaitWrite;
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outb(0x64, 0xAB);
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WaitRead;
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uint8_t test = inb(0x60);
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if (test != 0x00)
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{
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if (test == 0xFA)
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{
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trace("PS/2 keyboard sent ACK to test request.");
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WaitRead;
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test = inb(0x60);
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}
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if (test != 0x00)
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{
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SetMessageLocation;
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ExPrint(ERROR_COLOR
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"PS/2 keyboard self test failed (%#x)\n" DEFAULT_COLOR,
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test);
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CPU::Stop();
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}
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}
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}
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Display->Print('.');
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/* Configure the controller */
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{
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/* Read Controller Configuration */
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WaitWrite;
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outb(0x64, 0x20);
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WaitRead;
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uint8_t cfg = inb(0x60);
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/* Enable Port 1 & Port 1 translation */
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cfg |= 0b01000001;
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/* Write Controller Configuration */
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WaitWrite;
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outb(0x64, 0x60);
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WaitWrite;
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outb(0x60, cfg);
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}
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Display->Print('.');
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/* Enable port 1; Set scan code; Enable scanning */
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{
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/* Enable Port 1 */
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outb(0x64, 0xAE);
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/* Set scan code set 1 */
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WaitWrite;
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outb(0x60, 0xF0);
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WaitWrite;
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outb(0x60, 0x02);
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/* Check if we have scan code set 1 */
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WaitWrite;
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outb(0x60, 0xF0);
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WaitWrite;
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outb(0x60, 0x00);
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/* Read scan code set */
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WaitRead;
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uint8_t scs = inb(0x60);
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if (scs == 0xFA || scs == 0xFE)
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{
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if (scs == 0xFA)
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trace("PS/2 keyboard sent ACK to scan code set request.");
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if (scs == 0xFE)
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trace("PS/2 keyboard sent RESEND to scan code set request.");
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WaitRead;
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scs = inb(0x60);
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}
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if (scs != 0x41)
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{
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SetMessageLocation;
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ExPrint(WARN_COLOR
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"PS/2 keyboard scan code set 1 not supported (%#x)\n" DEFAULT_COLOR,
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scs);
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}
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/* Enable scanning */
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outb(0x60, 0xF4);
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}
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Display->Print('.');
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#endif // defined(a86)
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CPU::Interrupts(CPU::Enable);
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}
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nsa void CrashKeyboardDriver::OnInterruptReceived(CPU::TrapFrame *Frame)
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{
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#if defined(a86)
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UNUSED(Frame);
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uint8_t scanCode = inb(0x60);
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if (scanCode == KEY_D_TAB ||
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scanCode == KEY_D_LCTRL ||
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scanCode == KEY_D_LALT ||
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scanCode == KEY_U_LCTRL ||
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scanCode == KEY_U_LALT)
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return;
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switch (scanCode)
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{
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case KEY_D_UP:
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case KEY_D_LEFT:
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case KEY_D_RIGHT:
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case KEY_D_DOWN:
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ArrowInput(scanCode);
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break;
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default:
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break;
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}
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int key = GetLetterFromScanCode(scanCode);
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if (key != KEY_INVALID)
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{
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if (key == KEY_D_BACKSPACE)
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{
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if (BackSpaceLimit > 0)
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{
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Display->Print('\b');
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backspace(UserInputBuffer);
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BackSpaceLimit--;
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}
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}
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else if (key == '\n')
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{
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UserInput(UserInputBuffer);
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BackSpaceLimit = 0;
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UserInputBuffer[0] = '\0';
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}
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else
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{
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append(UserInputBuffer, s_cst(char, key));
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Display->Print((char)key);
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BackSpaceLimit++;
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}
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Display->UpdateBuffer(); /* Update as we type. */
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}
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#endif // a64 || a32
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}
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