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keyboard

This commit is contained in:
c0repwn3r 2022-05-15 19:02:09 -04:00
parent 20b96b2086
commit 02abf375d3
Signed by: core
GPG Key ID: FDBF740DADDCEECF
12 changed files with 311 additions and 61 deletions
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14
Makefile
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@ -43,7 +43,12 @@ default: run
.FORCE:
include/shade/version.h: .FORCE
bin/shade.iso: bin/shade.bin
cp bin/shade.bin src/iso/boot/shade.bin
grub-mkrescue src/iso/ -o $@
rm src/iso/boot/shade.bin
bin/shade.bin: $(sboot_object_files) $(kernel_object_files) $(libc_object_files)
echo "#ifndef VERSION_H" > include/shade/version.h
echo "#define VERSION_H" >> include/shade/version.h
echo "// This file was autogenerated by the shadeOS build system. It should not be modified." >> include/shade/version.h
@ -53,13 +58,6 @@ include/shade/version.h: .FORCE
echo "#define SHADE_OS_COMPILE_DATE \"$(date)\"" >> include/shade/version.h
echo "#define SHADE_OS_CODENAME \"$(codename)\"" >> include/shade/version.h
echo "#endif" >> include/shade/version.h
bin/shade.iso: bin/shade.bin
cp bin/shade.bin src/iso/boot/shade.bin
grub-mkrescue src/iso/ -o $@
rm src/iso/boot/shade.bin
bin/shade.bin: $(sboot_object_files) $(kernel_object_files) $(libc_object_files)
mkdir -p "$(@D)"
$(LD) $(LDFLAGS) -n -T $(shade_bin_ldfile) $^ -o $@
grub-file --is-x86-multiboot2 $@

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bin/shade.bin
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bin/shade.iso
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6
include/shade/platform/drivers/keyboard.h Normal file
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@ -0,0 +1,6 @@
#ifndef KEYBOARD_H
#define KEYBOARD_H
void init_keyboard();
#endif

77
include/shade/platform/interrupts/isr.h
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@ -5,61 +5,38 @@
#define ERR_MAX 5
#define IRQ_MIN 0x20
#define IRQ_MAX 0x2f
#define IRQ0 0x20
#define IRQ1 0x21
#define IRQ2 0x22
#define IRQ3 0x23
#define IRQ4 0x24
#define IRQ5 0x25
#define IRQ6 0x26
#define IRQ7 0x27
#define IRQ8 0x28
#define IRQ9 0x29
#define IRQ10 0x2a
#define IRQ11 0x2b
#define IRQ12 0x2c
#define IRQ13 0x2d
#define IRQ14 0x2e
#define IRQ15 0x2f
static int err_count = 0;
typedef struct {
struct {
uint64_t resv0;
uint64_t resv1;
uint64_t resv2;
uint64_t resv3;
} broken;
struct {
uint64_t resv0;
uint64_t resv1;
uint64_t resv2;
uint64_t resv3;
uint64_t resv4;
uint64_t resv5;
} broken_2;
struct {
uint64_t resv0;
uint64_t error_code;
uint64_t resv1;
uint64_t vector;
uint64_t resv2;
uint64_t resv3;
uint64_t resv4;
uint64_t resv5;
} base_frame;
} isr_xframe_t;
/*
List of pushed things in order:
error_code
vector
rbp
rax
rbx
rcx
rdx
rsi
rdi
cr0
cr2
cr3
cr4
ds
0
*/
static void (*interrupt_handlers[256]) (uint8_t vector, uint16_t err);
__attribute__((noreturn))
void exception_handler(uint8_t vector, uint16_t err);
__attribute__((noreturn))
void interrupt_handler(isr_xframe_t frame);
int register_interrupt_handler(int vector, void (*handler)(uint8_t, uint16_t));
int unregister_interrupt_handler(int vector);
void default_handler(uint8_t vector, uint16_t err);
void fill_isr();
#endif

16
include/shade/platform/interrupts/pic.h
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@ -27,6 +27,22 @@
#define PIC_READ_IRR 0x0a /* OCW3 irq ready next CMD read */
#define PIC_READ_ISR 0x0b /* OCW3 irq service next CMD read */
#define IRQ_PIT 0
#define IRQ_KEYBOARD 1
#define IRQ_INTERNAL 2
#define IRQ_COM2 3
#define IRQ_COM1 4
#define IRQ_LPT2 5
#define IRQ_FLOPPY 6
#define IRQ_LPT1 7
#define IRQ_CMOS 8
#define IRQ_UNUSED 9
#define IRQ_UNUSED 10
#define IRQ_UNUSED 11
#define IRQ_PS2_MOUSE 12
#define IRQ_FPU 13
#define IRQ_ATA_PRIMARY 14
#define IRQ_ATA_SECONDARY 15
void pic_send_eoi(uint8_t irq);
void pic_remap(int offset1, int offset2);

4
include/shade/version.h
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@ -3,7 +3,7 @@
// This file was autogenerated by the shadeOS build system. It should not be modified.
#define SHADE_OS_KERNEL_VERSION "0.1.1-alpha"
#define SHADE_OS_KERNEL "shade-development"
#define SHADE_OS_BUILD "b4e6b2e"
#define SHADE_OS_COMPILE_DATE "Sun May 15 05:41:17 PM EDT 2022"
#define SHADE_OS_BUILD "20b96b2"
#define SHADE_OS_COMPILE_DATE "Sun May 15 07:01:51 PM EDT 2022"
#define SHADE_OS_CODENAME "willow"
#endif

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obj/kernel/kernel.o
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17
src/kernel/kernel.c
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@ -1,7 +1,10 @@
#include <shade/platform/ports.h>
#include <shade/platform/drivers/vga_text_mode.h>
#include <shade/platform/interrupts/idt.h>
#include <shade/platform/interrupts/isr.h>
#include <shade/platform/interrupts/pic.h>
#include <shade/platform/drivers/keyboard.h>
#include <shade/platform/ports.h>
#include <shade/version.h>
#include <printf.h>
#include <shade/kmsg.h>
@ -37,8 +40,20 @@ void kmain() {
kprintf("The full license can be found at /sys/LICENCE on this system or ./LICENCE in the source tree.\n");
pic_remap(0x20, 0x28);
fill_isr(); // ISR must be filled before interrupts are enabled
idt_assemble();
kmsg_ok("Enabled interrupts\n");
kmsg_ok("Enabled interrupts");
init_keyboard();
idt_disable_interrupts();
outb(0x21,0xfd);
outb(0xa1,0xff);
idt_enable_interrupts();
kmsg_ok("Enabled keyboard");
__asm__ __volatile__ ("int $2");
for (;;) {}
}

209
src/kernel/platform/drivers/keyboard.c Normal file
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@ -0,0 +1,209 @@
#include <shade/platform/drivers/keyboard.h>
#include <shade/platform/ports.h>
#include <shade/platform/interrupts/isr.h>
#include <shade/platform/interrupts/pic.h>
#include <stdint.h>
#include <printf.h>
void keyboard_callback(uint8_t vector, uint16_t err) {
// PIC leaves scancode in port 0x60
uint8_t scancode = inb(0x60);
print_letter(scancode);
}
void init_keyboard() {
register_interrupt_handler(IRQ1, keyboard_callback);
pic_unmask_irq(IRQ_KEYBOARD);
}
void print_letter(uint8_t scancode) {
switch (scancode) {
case 0x0:
kprintf("ERROR");
break;
case 0x1:
kprintf("ESC");
break;
case 0x2:
kprintf("1");
break;
case 0x3:
kprintf("2");
break;
case 0x4:
kprintf("3");
break;
case 0x5:
kprintf("4");
break;
case 0x6:
kprintf("5");
break;
case 0x7:
kprintf("6");
break;
case 0x8:
kprintf("7");
break;
case 0x9:
kprintf("8");
break;
case 0x0A:
kprintf("9");
break;
case 0x0B:
kprintf("0");
break;
case 0x0C:
kprintf("-");
break;
case 0x0D:
kprintf("+");
break;
case 0x0E:
kprintf("Backspace");
break;
case 0x0F:
kprintf("Tab");
break;
case 0x10:
kprintf("Q");
break;
case 0x11:
kprintf("W");
break;
case 0x12:
kprintf("E");
break;
case 0x13:
kprintf("R");
break;
case 0x14:
kprintf("T");
break;
case 0x15:
kprintf("Y");
break;
case 0x16:
kprintf("U");
break;
case 0x17:
kprintf("I");
break;
case 0x18:
kprintf("O");
break;
case 0x19:
kprintf("P");
break;
case 0x1A:
kprintf("[");
break;
case 0x1B:
kprintf("]");
break;
case 0x1C:
kprintf("ENTER");
break;
case 0x1D:
kprintf("LCtrl");
break;
case 0x1E:
kprintf("A");
break;
case 0x1F:
kprintf("S");
break;
case 0x20:
kprintf("D");
break;
case 0x21:
kprintf("F");
break;
case 0x22:
kprintf("G");
break;
case 0x23:
kprintf("H");
break;
case 0x24:
kprintf("J");
break;
case 0x25:
kprintf("K");
break;
case 0x26:
kprintf("L");
break;
case 0x27:
kprintf(";");
break;
case 0x28:
kprintf("'");
break;
case 0x29:
kprintf("`");
break;
case 0x2A:
kprintf("LShift");
break;
case 0x2B:
kprintf("\\");
break;
case 0x2C:
kprintf("Z");
break;
case 0x2D:
kprintf("X");
break;
case 0x2E:
kprintf("C");
break;
case 0x2F:
kprintf("V");
break;
case 0x30:
kprintf("B");
break;
case 0x31:
kprintf("N");
break;
case 0x32:
kprintf("M");
break;
case 0x33:
kprintf(",");
break;
case 0x34:
kprintf(".");
break;
case 0x35:
kprintf("/");
break;
case 0x36:
kprintf("Rshift");
break;
case 0x37:
kprintf("Keypad *");
break;
case 0x38:
kprintf("LAlt");
break;
case 0x39:
kprintf("Spc");
break;
default:
/* 'keuyp' event corresponds to the 'keydown' + 0x80
* it may still be a scancode we haven't implemented yet, or
* maybe a control/escape sequence */
/*
if (scancode <= 0x7f) {
kprintf("Unknown key down");
} else if (scancode <= 0x39 + 0x80) {
kprintf("key up ");
print_letter(scancode - 0x80);
} else kprintf("Unknown key up");
*/
break;
}
}

24
src/kernel/platform/interrupts/isr.c
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@ -1,11 +1,35 @@
#include <printf.h>
#include <shade/platform/interrupts/isr.h>
#include <shade/platform/interrupts/pic.h>
void exception_handler(uint8_t vector, uint16_t err) {
(*interrupt_handlers[vector])(vector, err);
if (vector >= IRQ_MIN && vector <= IRQ_MAX) {
// needs EOI
pic_send_eoi(vector);
}
}
int register_interrupt_handler(int vector, void (*handler)(uint8_t, uint16_t)) {
interrupt_handlers[vector] = handler;
}
int unregister_interrupt_handler(int vector) {
interrupt_handlers[vector] = default_handler;
}
void default_handler(uint8_t vector, uint16_t err) {
kprintf(" %i: cpu: check_exception 0x%x err_code => %x\n", err_count, vector, err);
kprintf(" %i: cpu: no irq for vector 0x%x\n", err_count, vector);
err_count++;
if (err_count > ERR_MAX) {
kprintf("cpu: ierr hit err_max, halt\n");
__asm__ __volatile__("cli; hlt");
}
}
void fill_isr() {
for (int i = 0; i < 256; i++) {
register_interrupt_handler(i, default_handler);
}
}

5
src/kernel/platform/interrupts/pic.c
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@ -1,5 +1,6 @@
#include <shade/platform/interrupts/pic.h>
#include <shade/platform/ports.h>
#include <shade/platform/interrupts/idt.h>
void pic_send_eoi(uint8_t irq) {
if (irq >= 8) {
@ -37,6 +38,7 @@ void pic_remap(int offset1, int offset2) {
}
void pic_mask_irq(uint8_t irq) {
idt_disable_interrupts();
uint16_t port;
uint8_t value;
@ -48,9 +50,11 @@ void pic_mask_irq(uint8_t irq) {
}
value = inb(port) | (1 << irq);
outb(port, value);
idt_enable_interrupts();
}
void pic_unmask_irq(uint8_t irq) {
idt_disable_interrupts();
uint16_t port;
uint8_t value;
@ -62,6 +66,7 @@ void pic_unmask_irq(uint8_t irq) {
}
value = inb(port) & ~(1 << irq);
outb(port, value);
idt_enable_interrupts();
}
static uint16_t __pic_get_irq_reg(int ocw3) {