interrupts.c File Reference

#include <system.h>
#include <core/io.h>
#include <core/serial.h>
#include <core/tables.h>
#include <core/interrupts.h>

Include dependency graph for interrupts.c:

Go to the source code of this file.

Macros
#define	PIC1   0x20
#define	PIC2   0xA0
#define	ICW1   0x11
#define	ICW4   0x01
#define	io_wait()   asm volatile ("outb $0x80")

Functions
void	divide_error ()
void	debug ()
void	nmi ()
void	breakpoint ()
void	overflow ()
void	bounds ()
void	invalid_op ()
void	device_not_available ()
void	double_fault ()
void	coprocessor_segment ()
void	invalid_tss ()
void	segment_not_present ()
void	stack_segment ()
void	general_protection ()
void	page_fault ()
void	reserved ()
void	coprocessor ()
void	rtc_isr ()
void	sys_call_isr ()
void	isr0 ()
void	do_isr ()
void	init_irq (void)
void	init_pic (void)
void	do_divide_error ()
void	do_debug ()
void	do_nmi ()
void	do_breakpoint ()
void	do_overflow ()
void	do_bounds ()
void	do_invalid_op ()
void	do_device_not_available ()
void	do_double_fault ()
void	do_coprocessor_segment ()
void	do_invalid_tss ()
void	do_segment_not_present ()
void	do_stack_segment ()
void	do_general_protection ()
void	do_page_fault ()
void	do_reserved ()
void	do_coprocessor ()

Variables
idt_entry	idt_entries [256]

Macro Definition Documentation

#define ICW1   0x11

Definition at line 20 of file interrupts.c.

Referenced by init_pic().

#define ICW4   0x01

Definition at line 21 of file interrupts.c.

Referenced by init_pic().

#define io_wait

(

)

asm volatile ("outb $0x80")

Definition at line 28 of file interrupts.c.

Referenced by init_pic().

#define PIC1   0x20

Definition at line 16 of file interrupts.c.

Referenced by init_pic().

#define PIC2   0xA0

Definition at line 17 of file interrupts.c.

Referenced by init_pic().

Function Documentation

void bounds

(

)

Referenced by init_irq().

void breakpoint

(

)

Referenced by init_irq().

void coprocessor

(

)

Referenced by init_irq().

void coprocessor_segment

(

)

Referenced by init_irq().

void debug

(

)

Referenced by init_irq().

void device_not_available

(

)

Referenced by init_irq().

void divide_error

(

)

Referenced by init_irq().

void do_bounds

(

)

Definition at line 152 of file interrupts.c.

References kpanic().

{
  kpanic("Bounds error");
}

void do_breakpoint

(

)

Definition at line 144 of file interrupts.c.

References kpanic().

{
  kpanic("Breakpoint");
}

void do_coprocessor

(

)

Definition at line 196 of file interrupts.c.

References kpanic().

{
  kpanic("Coprocessor error");
}

void do_coprocessor_segment

(

)

Definition at line 168 of file interrupts.c.

References kpanic().

{
  kpanic("Coprocessor segment error");
}

void do_debug

(

)

Definition at line 136 of file interrupts.c.

References kpanic().

{
  kpanic("Debug");
}

void do_device_not_available

(

)

Definition at line 160 of file interrupts.c.

References kpanic().

{
  kpanic("Device not available");
}

void do_divide_error

(

)

Definition at line 132 of file interrupts.c.

References kpanic().

{
  kpanic("Division-by-zero");
}

void do_double_fault

(

)

Definition at line 164 of file interrupts.c.

References kpanic().

{
  kpanic("Double fault");
}

void do_general_protection

(

)

Definition at line 184 of file interrupts.c.

References kpanic().

{
  kpanic("General protection fault");
}

void do_invalid_op

(

)

Definition at line 156 of file interrupts.c.

References kpanic().

{
  kpanic("Invalid operation");
}

void do_invalid_tss

(

)

Definition at line 172 of file interrupts.c.

References kpanic().

{
  kpanic("Invalid TSS");
}

void do_isr

(

)

Definition at line 55 of file interrupts.c.

References COM2, inb, outb, serial_print(), and serial_println().

{
  char in = inb(COM2);
  serial_print(&in);
  serial_println("here");
  outb(0x20,0x20); //EOI
}

void do_nmi

(

)

Definition at line 140 of file interrupts.c.

References kpanic().

{
  kpanic("NMI");
}

void do_overflow

(

)

Definition at line 148 of file interrupts.c.

References kpanic().

{
  kpanic("Overflow error");
}

void do_page_fault

(

)

Definition at line 188 of file interrupts.c.

References kpanic().

{
  kpanic("Page Fault");
}

void do_reserved

(

)

Definition at line 192 of file interrupts.c.

References serial_println().

{
  serial_println("die: reserved");
}

void do_segment_not_present

(

)

Definition at line 176 of file interrupts.c.

References kpanic().

{
  kpanic("Segment not present");
}

void do_stack_segment

(

)

Definition at line 180 of file interrupts.c.

References kpanic().

{
  kpanic("Stack segment error");
}

void double_fault

(

)

Referenced by init_irq().

void general_protection

(

)

Referenced by init_irq().

void init_irq

(

void

)

Definition at line 68 of file interrupts.c.

References bounds(), breakpoint(), coprocessor(), coprocessor_segment(), debug(), device_not_available(), divide_error(), double_fault(), general_protection(), idt_set_gate(), invalid_op(), invalid_tss(), nmi(), overflow(), page_fault(), reserved(), rtc_isr(), segment_not_present(), stack_segment(), and sys_call_isr().

Referenced by kmain().

{  
  int i;

  // Necessary interrupt handlers for protected mode
  u32int isrs[17] = {
    (u32int)divide_error,
    (u32int)debug,
    (u32int)nmi,
    (u32int)breakpoint,
    (u32int)overflow,
    (u32int)bounds,
    (u32int)invalid_op,
    (u32int)device_not_available,
    (u32int)double_fault,
    (u32int)coprocessor_segment,
    (u32int)invalid_tss,
    (u32int)segment_not_present,
    (u32int)stack_segment,
    (u32int)general_protection,
    (u32int)page_fault,
    (u32int)reserved,
    (u32int)coprocessor
  };

  // Install handlers; 0x08=sel, 0x8e=flags
  for(i=0; i<32; i++){
    if (i<17) idt_set_gate(i, isrs[i], 0x08, 0x8e);
    else idt_set_gate(i, (u32int)reserved, 0x08, 0x8e);
  }
  // Ignore interrupts from the real time clock
  idt_set_gate(0x08, (u32int)rtc_isr, 0x08, 0x8e);
  idt_set_gate(60, (u32int)sys_call_isr, 0x08, 0x8e);
}

void init_pic

(

void

)

Definition at line 109 of file interrupts.c.

References ICW1, ICW4, io_wait, outb, PIC1, and PIC2.

Referenced by kmain().

{
  outb(PIC1,ICW1);   //send initialization code words 1 to PIC1
  io_wait();
  outb(PIC2,ICW1);   //send icw1 to PIC2
  io_wait();
  outb(PIC1+1,0x20); //icw2: remap irq0 to 32
  io_wait();
  outb(PIC2+1,0x28); //icw2: remap irq8 to 40
  io_wait();
  outb(PIC1+1,4);    //icw3
  io_wait();
  outb(PIC2+1,2);    //icw3
  io_wait();
  outb(PIC1+1,ICW4); //icw4: 80x86, automatic handling
  io_wait();
  outb(PIC2+1,ICW4); //icw4: 80x86, automatic handling
  io_wait();
  outb(PIC1+1,0xFF); //disable irqs for PIC1
  io_wait();
  outb(PIC2+1,0xFF); //disable irqs for PIC2
}

void invalid_op

(

)

Referenced by init_irq().

void invalid_tss

(

)

Referenced by init_irq().

void isr0

(

)

void nmi

(

)

Referenced by init_irq().

void overflow

(

)

Referenced by init_irq().

void page_fault

(

)

Referenced by init_irq().

void reserved

(

)

Referenced by init_irq().

void rtc_isr

(

)

Referenced by init_irq().

void segment_not_present

(

)

Referenced by init_irq().

void stack_segment

(

)

Referenced by init_irq().

void sys_call_isr

(

)

Referenced by init_irq().

Variable Documentation

idt_entry idt_entries[256]

Definition at line 17 of file tables.c.

Referenced by idt_set_gate(), and init_idt().