75 lines
1.7 KiB
C
75 lines
1.7 KiB
C
// This file is part of noxos and licensed under the MIT open source license
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#ifndef NOX_INTERRUPTS_H
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#define NOX_INTERRUPTS_H
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#include "utils/stdtypes.h"
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#define IDT_ENTRY_INTR_GATE 0b10001110
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#define IDT_ENTRY_CALL_GATE 0b10001100
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#define IDT_ENTRY_TRAP_GATE 0b10001111
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#define PIC_MASTER_PORT 0x20
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#define PIC_MASTER_COMMAND 0x20
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#define PIC_MASTER_DATA 0x21
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#define PIC_SLAVE_PORT 0xA0
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#define PIC_SLAVE_COMMAND 0xA0
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#define PIC_SLAVE_DATA 0xA1
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#define PIC_END_OF_INTERRUPT 0x20
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#define ICW1_ICW4 0x01
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#define ICW1_INIT 0x10
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#define ICW4_8086 0x01
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#define IRQ_MASTER_OFFSET 0x20
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#define IRQ_SLAVE_OFFSET 0x28
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typedef enum {
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// Master PIC
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IRQ_PIT,
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IRQ_KEYBOARD,
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IRQ_CASCADE,
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IRQ_COM2,
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IRQ_COM1,
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IRQ_LPT2,
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IRQ_FLOPPY,
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IRQ_SPURIOUS,
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// Slave PIC
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IRQ_CMOS_RTC,
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IRQ_FREE_0,
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IRQ_FREE_1,
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IRQ_FREE_2,
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IRQ_PS2_MOUSE,
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IRQ_FPU,
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IRQ_ATA_PRIMARY,
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IRQ_ATA_SECONDARY
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} pic_irq_E;
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typedef struct {
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uint16_t limit;
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uint64_t offset;
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} __attribute__((packed)) idt_register_T;
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typedef struct {
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uint16_t offset0;
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uint16_t selector;
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uint8_t ist;
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uint8_t type_attribute;
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uint16_t offset1;
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uint32_t offset2;
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uint32_t ignore;
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} idt_descriptor_entry_T;
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extern idt_register_T g_idt_register;
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extern uint8_t g_handling_interrupt;
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void idt_init ();
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void pic_init ();
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void pic_remap ();
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void pic_send_end_of_interrupt (pic_irq_E irq);
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void pic_mask_irq (pic_irq_E irq);
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void pic_unmask_irq (pic_irq_E irq);
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#endif //NOX_INTERRUPTS_H
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