56 lines
1.5 KiB
C
56 lines
1.5 KiB
C
#ifndef INTERRUPTS_H
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#define INTERRUPTS_H
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#include "types.h"
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// There are more interrupts but tbh i doubt we're going to need them
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#define i_Timer 0
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#define i_Keyboard 1
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#define i_PIC2 2
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#define i_COM2 3
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#define i_COM1 4
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#define i_LPT2 5
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struct cpu_reg_state {
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u32 gs, fs, es, ds; // segment registers
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u32 edi, esi, ebp, esp; // generaal purupose via pushad
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u32 ebx, edx, ecx, eax;
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u32 int_no, err_code; // pushed by each interrupt dispatcher
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u32 eip, cs, eflags, useresp, ss; // processor pushes this automatically
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}__attribute__((packed)); // we shouldn't need packing since everythign is dwords here
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#define IDT_SIZE 256
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struct IDT_Entry {
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u16 offset_low; // offset bits 0..15
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u16 selector; // code segment in either gdt or ldt
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u8 zero; // not used always 0
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/* 7 0
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* +---+---+---+---+---+---+---+---+
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* | P | DPL | S | GateType |
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* +---+---+---+---+---+---+---+---+
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*/
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u8 type_attrs; // format specified above
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u16 offset_high;// offset bits 16..31
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}__attribute__((packed));
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struct IDT_PTR {
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u16 limit;
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u32 address;
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}__attribute__((packed));
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struct IDT_Entry IDT[IDT_SIZE];
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struct IDT_PTR idt_ptr;
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void init_idt();
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void setup_idt_entry(u32 t_idx, u32 base, u16 sel, u8 type_attrs);
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void int_keyboard(struct cpu_reg_state*);
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void interrupt_handler(struct cpu_reg_state*);
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// IRQ specifi functions
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void init_irq_handler(u32 irq, void (*handler)(struct cpu_reg_state* cpu));
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void irq_handler(struct cpu_reg_state* cpu);
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#endif
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