isr.h

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#pragma once
 
#include "kernel.h"
 
// TODO: see interrupt_handler_t in Linux, it is quite different.
typedef void (*interrupt_handler_t)(pt_regs *f);
 
void isrs_init(void);
 
void irq_init(void);
 
/* Even if an interrupt service routine is called for exceptions and
 * interrupts, we use two distinct methods to logically setup an ISR to
 * handle theme. Tecnically speacking, exceptions are synchronous interrupts
 * generated by CPU. For an exception we have an ISR. Interrupts are
 * asynchronous events generated by PIC. Furthermore, multiple ISRs can be set
 * for a same IRQ.
 */
 
int isr_install_handler(unsigned i, interrupt_handler_t handler, char *description);
 
int isr_uninstall_handler(unsigned i);
 
int irq_install_handler(unsigned i, interrupt_handler_t handler, char *description);
 
int irq_uninstall_handler(unsigned i, interrupt_handler_t handler);
 
extern void irq_handler(pt_regs *f);
 
extern void isq_handler(pt_regs *f);
 
//==== List of exceptions generated internally by the CPU ======================
#define DIVIDE_ERROR        0  
#define DEBUG_EXC           1  
#define NMI_INTERRUPT       2  
#define BREAKPOINT          3  
#define OVERFLOW            4  
#define BOUND_RANGE_EXCEED  5  
#define INVALID_OPCODE      6  
#define DEV_NOT_AVL         7  
#define DOUBLE_FAULT        8  
#define COPROC_SEG_OVERRUN  9  
#define INVALID_TSS         10 
#define SEGMENT_NOT_PRESENT 11 
#define STACK_SEGMENT_FAULT 12 
#define GENERAL_PROTECTION  13 
#define PAGE_FAULT          14 
#define INT_RSV             15 
#define FLOATING_POINT_ERR  16 
#define ALIGNMENT_CHECK     17 
#define MACHINE_CHECK       18 
#define SIMD_FP_EXC         19 
#define VIRT_EXC            20 
// Reserved [21-29].
#define SECURITY_EXC 30 
#define TRIPLE_FAULT 31 
#define SYSTEM_CALL  80 
                        //==============================================================================