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Import the "gerbert" kernel I worked on earlier this year.

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It's a lot crappier than I remembered it. It's gonna need a lot of work.
This commit is contained in:
Andreas Kling 2018-10-16 11:01:38 +02:00
parent f608629704
commit 9396108034
55 changed files with 4600 additions and 0 deletions
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135
Kernel/Keyboard.cpp Normal file
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#include "types.h"
#include "i386.h"
#include "IO.h"
#include "IPC.h"
#include "Task.h"
#include "VGA.h"
#include "PIC.h"
#include "Keyboard.h"
#define IRQ_KEYBOARD 1
#define I8042_BUFFER 0x60
#define I8042_STATUS 0x64
#define SET_LEDS 0xED
#define DATA_AVAILABLE 0x01
#define I8042_ACK 0xFA
extern "C" void handleKeyboardInterrupt();
extern "C" void keyboard_ISR();
static BYTE s_ledState;
asm(
".globl keyboard_ISR \n"
"keyboard_ISR: \n"
" pusha\n"
" pushw %ds\n"
" pushw %es\n"
" pushw %ss\n"
" pushw %ss\n"
" popw %ds\n"
" popw %es\n"
" call handleKeyboardInterrupt\n"
" popw %es\n"
" popw %ds\n"
" popa\n"
" iret\n"
);
void handleKeyboardInterrupt()
{
IRQHandlerScope scope(IRQ_KEYBOARD);
Keyboard::handleInterrupt();
}
namespace Keyboard {
#define MOD_ALT 1
#define MOD_CTRL 2
#define MOD_SHIFT 4
static char map[0x100] =
{
0, 0, '1', '2', '3', '4', '5', '6', '7', '8', '9', '0', '-', '=', 0, 0,
'q', 'w', 'e', 'r', 't', 'y', 'u', 'i', 'o', 'p', '[', ']', 0, 0,
'a', 's', 'd', 'f', 'g', 'h', 'j', 'k', 'l', ';', '\'', '`', 0, '\\',
'z', 'x', 'c', 'v', 'b', 'n', 'm', ',', '.', '/',
};
static char shift_map[0x100] =
{
0, 0, '!', '@', '#', '$', '%', '^', '&', '*', '(', ')', '_', '+', 0, 0,
'Q', 'W', 'E', 'R', 'T', 'Y', 'U', 'I', 'O', 'P', '{', '}', 0, 0,
'A', 'S', 'D', 'F', 'G', 'H', 'J', 'K', 'L', ':', '"', '~', 0, '|',
'Z', 'X', 'C', 'V', 'B', 'N', 'M', '<', '>', '?',
};
static BYTE s_modifiers;
void handleInterrupt()
{
while (IO::in8(0x64) & 1) {
BYTE ch = IO::in8(0x60);
switch (ch) {
case 0x38: s_modifiers |= MOD_ALT; break;
case 0xB8: s_modifiers &= ~MOD_ALT; break;
case 0x1D: s_modifiers |= MOD_CTRL; break;
case 0x9D: s_modifiers &= ~MOD_CTRL; break;
case 0x2A: s_modifiers |= MOD_SHIFT; break;
case 0xAA: s_modifiers &= ~MOD_SHIFT; break;
case 0x1C: /* enter */ kprintf("\n"); break;
case 0xFA: /* i8042 ack */ break;
default:
if (ch & 0x80) {
// key has been depressed
break;
}
if (!s_modifiers)
kprintf("%c", map[ch]);
else if (s_modifiers & MOD_SHIFT)
kprintf("%c", shift_map[ch]);
else if (s_modifiers & MOD_CTRL)
kprintf("^%c", shift_map[ch]);
}
//break;
}
}
void initialize()
{
s_modifiers = 0;
s_ledState = 0;
// Empty the buffer of any pending data.
// I don't care what you've been pressing until now!
while (IO::in8(I8042_STATUS ) & DATA_AVAILABLE)
IO::in8(I8042_BUFFER);
registerInterruptHandler(IRQ_VECTOR_BASE + IRQ_KEYBOARD, keyboard_ISR);
PIC::enable(IRQ_KEYBOARD);
}
void setLED(LED led)
{
s_ledState |= (BYTE)led & 7;
while (IO::in8(I8042_STATUS) & DATA_AVAILABLE);
IO::out8(I8042_BUFFER, SET_LEDS);
while (IO::in8(I8042_BUFFER) != I8042_ACK);
IO::out8(I8042_BUFFER, s_ledState);
}
void unsetLED(LED led)
{
s_ledState &= ~((BYTE)led & 7);
while (IO::in8(I8042_STATUS) & DATA_AVAILABLE);
IO::out8(I8042_BUFFER, SET_LEDS);
while (IO::in8(I8042_BUFFER) != I8042_ACK);
IO::out8(I8042_BUFFER, s_ledState);
}
}