feat: irq interrupts; basic kb driver

kernel/CMakeLists.txt

@@ -23,6 +23,7 @@ add_executable(kernel
     src/modules/console.c
     src/modules/rand.c
     src/modules/panic.c
+    src/modules/keyboard.c
     src/modules/kfetch.c
     data/font8x16.c
 )

kernel/include/io.h

@@ -4,6 +4,11 @@
 #ifndef IO_H
 #define IO_H
 
+#define MASTER_COMMAND 0x20
+#define MASTER_DATA    0x21
+#define SLAVE_COMMAND  0xA0
+#define SLAVE_DATA     0xA1
+
 static inline void outb(unsigned short port, unsigned char val) {
     __asm__ volatile( 
         "outb %0, %1" 

kernel/include/keyboard.h

@@ -0,0 +1,8 @@
+#ifndef KEYBOARD_H
+#define KEYBOARD_H
+
+#include "types.h"
+
+void kb_handler(Registers *regs);
+
+#endif

kernel/include/pic.h

@@ -4,4 +4,8 @@
 #ifndef PIC_H
 #define PIC_H
 
+#include "types.h"
+
+u16 pic_remap();
+
 #endif

kernel/src/asm/interrupts.asm

@@ -4,6 +4,7 @@
 bits 64
 
 extern isr_handler_c
+extern irq_handler_c
 
 section .text
 
@@ -22,6 +23,60 @@ isr%1:
     jmp isr_common_stub
 %endmacro
 
+%macro PUSHALL 0
+    push r15
+    push r14
+    push r13
+    push r12
+    push r11
+    push r10
+    push r9
+    push r8
+    push rbp
+    push rdi
+    push rsi
+    push rdx
+    push rcx
+    push rbx
+    push rax
+%endmacro
+
+%macro POPALL 0
+    pop rax
+    pop rbx
+    pop rcx
+    pop rdx
+    pop rsi
+    pop rdi
+    pop rbp
+    pop r8
+    pop r9
+    pop r10
+    pop r11
+    pop r12
+    pop r13
+    pop r14
+    pop r15
+%endmacro
+
+%macro IRQ_HANDLER 2
+global %2
+%2:
+    push 0   ; dummy err code 
+    push %1         
+    
+    PUSHALL
+    
+    mov rdi, rsp
+    cld 
+    call irq_handler_c
+    
+    POPALL
+    
+    add rsp, 16 
+    iretq
+%endmacro
+
 ISR_NOERRCODE 0   ; Divide by zero
 ISR_NOERRCODE 1   ; Debug
 ISR_NOERRCODE 2   ; NMI
@@ -56,40 +111,12 @@ ISR_ERRCODE   30  ; Security Exception
 ISR_NOERRCODE 31  ; Reserved
 
 isr_common_stub:
-    push r15
+    PUSHALL
-    push r14
-    push r13
-    push r12
-    push r11
-    push r10
-    push r9
-    push r8
-    push rdi
-    push rsi
-    push rbp
-    push rdx
-    push rcx
-    push rbx
-    push rax
 
     mov rdi, rsp
     call isr_handler_c
 
-    pop rax
+    POPALL
-    pop rbx
-    pop rcx
-    pop rdx
-    pop rbp
-    pop rsi
-    pop rdi
-    pop r8
-    pop r9
-    pop r10
-    pop r11
-    pop r12
-    pop r13
-    pop r14
-    pop r15
 
     add rsp, 16
     iretq
@@ -98,3 +125,6 @@ global idt_load
 idt_load:
     lidt [rdi]
     ret
+
+IRQ_HANDLER 32, irq0
+IRQ_HANDLER 33, irq1

kernel/src/kmain.c

@@ -11,19 +11,13 @@
 
 #include "gdt.h"
 #include "idt.h"
+#include "pic.h"
 #include "pmm.h"
 #include "vmm.h"
 
 #include "../data/logo.h"
 #include "vmm.h"
 
-
-int rectest(int a) {
-    volatile int b = a + 1;
-    kprintf("%d", b);
-    return rectest(b * 2);
-}
-
 extern u64 _kernel_end;
 extern u8* bitmap;
 extern u64 bitmap_size_g;
@@ -49,6 +43,7 @@ void kmain(Bootinfo* info) {
 
     gdt_init();
     idt_init();
+    pic_remap();
 
     SG_Point logo_point = {0, 10};
     sg_put_img(&sg_ctx, &logo_point, &logo_img);
@@ -68,18 +63,7 @@ void kmain(Bootinfo* info) {
     vmm_init(info);
 
     kprintf("\nIM ALIVE :D");
-
+    __asm__ volatile ("sti");
-    // kprintf("\nSetting up guard page test");
-    // u64* new_stack_phys = pmm_alloc_page();
-    // u64 stack_top = 0x40000000;
-    // vmm_map_page(pml4_kernel, (u64)new_stack_phys, stack_top, PTE_PRESENT | PTE_RW);
-    
-    // __asm__ volatile (
-    //   "mov %0, %%rsp \n"      
-    //   :: "r"(stack_top + 4096)
-    // );
-
-   // rectest(0);
 
     while (1) { __asm__("hlt"); }
 }

kernel/src/modules/idt.c

@@ -15,6 +15,7 @@ extern void isr16(); extern void isr17(); extern void isr18(); extern void isr19
 extern void isr20(); extern void isr21(); extern void isr22(); extern void isr23();
 extern void isr24(); extern void isr25(); extern void isr26(); extern void isr27();
 extern void isr28(); extern void isr29(); extern void isr30(); extern void isr31();
+extern void irq0(void); extern void irq1(void);
 
 extern void idt_load(u64); // asm: lidt [rdi] / ret
 
@@ -74,5 +75,8 @@ void idt_init() {
     idt[13].ist = 1;
     idt[14].ist = 1;
 
+    idt_set_gate(32, (u64)irq0, selector, flags);
+    idt_set_gate(33, (u64)irq1, selector, flags);
+
     __asm__ volatile ("lidt %0" : : "m"(idt_ptr));
 }

kernel/src/modules/interrupts.c

@@ -1,9 +1,22 @@
 // SPDX-License-Identifier: GPL-3.0-or-later
 // Copyright (c) 2025 0xKarinyash
 
+#include "io.h"
 #include "panic.h"
+#include "keyboard.h"
 #include "types.h"
 
+
 void isr_handler_c(Registers *regs) {
     panic_exception(regs);
 }
+
+void irq_handler_c(Registers *regs) {
+    switch (regs->int_no) {
+        case 32: return outb(MASTER_COMMAND, 0x20);
+        case 33: return kb_handler(regs);
+        default: outb(SLAVE_COMMAND, 0x20); break;
+    }
+
+    outb(MASTER_COMMAND, 0x20);
+}

kernel/src/modules/keyboard.c

@@ -0,0 +1,10 @@
+#include "keyboard.h"
+#include "console.h"
+#include "io.h"
+#include "types.h"
+
+void kb_handler(Registers *regs) {
+    u8 scancode = inb(0x60);
+    outb(MASTER_COMMAND, 0x20);
+    kprintf("Key: %x\n", scancode);
+}

kernel/src/modules/panic.c

@@ -47,7 +47,9 @@ const char* fun_messages[] = {
     "Pro tip: dont crash",
     "Stop ricing the kernel you loonixtard, TermOS is NOT Loonix",
     "Attaboy, Jack. He's good. Really good.",
-    ""
+    "Zhenih priehal",
+    "YOUR PC WAS BLOCKED BY FBI FOR WATCHING PORNOGRAPHY SEND 20 US DOLLARS",
+    "fuck off"
 };