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#ifndef MELVIX_INTERRUPTS_H
#define MELVIX_INTERRUPTS_H
#include <stddef.h>
#include <stdint.h>
/**
* Initialize the Interrupt Descriptor Table with 256 entries
*/
void idt_install();
/**
* Add new gate (Interrupt Service Routine) to the Interrupt Descriptor Table
* @param num The index of the routine in the IDT
* @param base The base address of the ISR
* @param sel The kernel code segment (0x08)
* @param flags The IDT access byte entry (P DPL 01110)
*/
void idt_set_gate(u8 num, unsigned long base, u16 sel, u8 flags);
/**
* Registers that get passed into an IRQ handler
*/
struct regs {
u32 gs, fs, es, ds;
u32 edi, esi, ebp, esp, ebx, edx, ecx, eax;
u32 int_no, err_code;
u32 eip, cs, eflags, useresp, ss;
};
/**
* Install 32 exception ISRs into the IDT
*/
void isrs_install();
/**
* Add a new Interrupt Request Handler
* @param irq The index of the IRQ routine
* @param handler The interrupt handler function
*/
typedef void (*irq_handler_t)(struct regs *);
void isr_install_handler(u32 isr, irq_handler_t handler);
/**
* Uninstall a handler by index
* @param irq The index of the IRQ routine that should be removed
*/
void isr_uninstall_handler(u32 isr);
/**
* Initialize the Interrupt Requests by mapping the ISRs to the correct
* entries in the IDT (install the exception handlers)
*/
void irq_install();
/**
* Add a new Interrupt Request Handler
* @param irq The index of the IRQ routine
* @param handler The interrupt handler function
*/
void irq_install_handler(int irq, void (*handler)(struct regs *r));
/**
* Uninstall a handler by index
* @param irq The index of the IRQ routine that should be removed
*/
void irq_uninstall_handler(int irq);
/**
* Execute the handler of the IRQ
* @param r The ISR that should be handled
*/
void irq_handler(struct regs *r);
/**
* Check if an IRQ is installed
* @param irq The index of the IRQ routine that should be checked
* @return 1 if installed, 0 if not
*/
int irq_is_installed(int irq);
/**
* Logs fault messages and panics
* @param r The registers
*/
void fault_handler(struct regs *r);
// Defined in isr.asm
extern void isr0();
extern void isr1();
extern void isr2();
extern void isr3();
extern void isr4();
extern void isr5();
extern void isr6();
extern void isr7();
extern void isr8();
extern void isr9();
extern void isr10();
extern void isr11();
extern void isr12();
extern void isr13();
extern void isr14();
extern void isr15();
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 isr128();
#endif
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