cos2000v2/lib/interrupts.c

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/*******************************************************************************/
/* COS2000 - Compatible Operating System - LGPL v3 - Hordé Nicolas */
/* */
#include "interrupts.h"
#include "types.h"
#include "asm.h"
#include "memory.h"
#include "video.h"
#include "gdt.h"
#include "system.h"
#include "debug.h"
#include "process.h"
#define IDT_SIZE 256 /* nombre de descripteurs */
/* registre idt */
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static struct idtr idtreg;
/* table de IDT */
static idtdes idt[IDT_SIZE];
static u32 retry_address;
/******************************************************************************/
/* Initialise la reprise après erreur */
void initretry(u32 address)
{
retry_address = address;
}
/******************************************************************************/
/* Récupère l'adresse de reprise après erreur */
u32 getinitretry(void)
{
return retry_address;
}
/******************************************************************************/
/* Initialise le controleur d'interruption 8259A */
void initpic(void)
{
/* MASTER */
/* Initialisation de ICW1 */
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outb(PIC1_CMD, ICW1_INIT + ICW1_ICW4);
nop();
/* Initialisation de ICW2 - vecteur de depart = 32 */
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outb(PIC1_DATA, 0x20);
nop();
/* Initialisation de ICW3 */
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outb(PIC1_DATA, 0x04);
nop();
/* Initialisation de ICW4 */
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outb(PIC1_DATA, ICW4_8086);
nop();
/* masquage des interruptions */
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outb(PIC1_DATA, 0xFF);
nop();
/* SLAVE */
/* Initialisation de ICW1 */
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outb(PIC2_CMD, ICW1_INIT + ICW1_ICW4);
nop();
/* Initialisation de ICW2 - vecteur de depart = 96 */
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outb(PIC2_DATA, 0x60);
nop();
/* Initialisation de ICW3 */
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outb(PIC2_DATA, 0x02);
nop();
/* Initialisation de ICW4 */
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outb(PIC2_DATA, ICW4_8086);
nop();
/* masquage des interruptions */
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outb(PIC2_DATA, 0xFF);
nop();
/* Demasquage des irqs sauf clavier
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outb(PIC1_DATA,0xFD);
nop();
*/
}
/******************************************************************************/
/* Active une IRQ */
void enableirq(u8 irq)
{
u16 port;
cli();
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port = (((irq & 0x08) << 4) + PIC1_DATA);
outb(port, inb(port) & ~(1 << (irq & 7)));
sti();
}
/******************************************************************************/
/* Désactive une IRQ */
void disableirq(u8 irq)
{
u16 port;
cli();
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port = (((irq & 0x08) << 4) + PIC1_DATA);
outb(port, inb(port) | (1 << (irq & 7)));
sti();
}
/******************************************************************************/
/* Créé un descripteur pour l'IDT */
void makeidtdes(u32 offset, u16 select, u16 type, idtdes * desc)
{
desc->offset0_15 = (offset & 0xffff);
desc->select = select;
desc->type = type;
desc->offset16_31 = (offset & 0xffff0000) >> 16;
return;
}
/******************************************************************************/
/* Change une entrée dans l'IDT */
void setidt(u32 offset, u16 select, u16 type, u16 index)
{
cli();
idtdes *desc;
desc = idtreg.base;
desc[index].offset0_15 = (offset & 0xffff);
desc[index].select = select;
desc[index].type = type;
desc[index].offset16_31 = (offset & 0xffff0000) >> 16;
sti();
}
/******************************************************************************/
/* Met une entrée dans l'IDT */
void putidt(u32 offset, u16 select, u16 type, u16 index)
{
idtdes temp;
makeidtdes(offset, select, type, &temp);
idt[index] = temp;
}
/******************************************************************************/
/* Affiche une erreur CPU et fige l'ordinateur */
void cpuerror(const u8 * src, const regs * stack)
{
printf("\033[31m*** ERREUR CPU : %s *** \r\n", src);
if (stack != NULL)
show_cpu(stack);
print("<Appuyer une touche pour continuer>\033[0m\r\n");
sti();
waitascii();
initselectors(retry_address);
/*while (true) {
nop();
} */
}
/******************************************************************************/
/* Déclenché lors de l'appel d'une interruption */
void interruption()
{
regs *dump;
exception_stack_noerror *caller;
u32 *oldesp;
savecpu_noerror(dump, caller, oldesp);
print("Appel d'une interruption\r\n");
restdebugcpu();
iret();
}
/******************************************************************************/
/* Les expections */
void exception0()
{
regs *dump;
exception_stack_noerror *caller;
u32 *oldesp;
savecpu_noerror(dump, caller, oldesp);
cpuerror("#DE Divide error", dump);
}
void exception1()
{
regs *dump;
exception_stack_noerror *caller;
u32 *oldesp;
savecpu_noerror(dump, caller, oldesp);
changevc(6);
clearscreen();
show_lightcpu(dump);
printf("\r\n\033[7m[P]\033[0m PAS A PAS \033[7m D \033[0m PAS A PAS DETAILLE \033[7m C \033[0m CONTINUER \033[7m S \033[0m STOPPER \033[7m V \033[0m VOIR \033[7m S \033[0m SCINDER");
sti();
u8 ascii = waitascii();
cli();
if (ascii == 'P' || ascii == 'p')
setdebugreg(0,
caller->eip + disasm(caller->eip, NULL, false),
DBG_EXEC);
else if (ascii == 'D' || ascii == 'd')
setdebugreg(0, 0, DBG_CLEAR);
else if (ascii == 'C' || ascii == 'c')
setdebugreg(0, 0, DBG_CLEAR);
else if (ascii == 'S' || ascii == 's')
{
changevc(0);
sti();
initselectors(retry_address);
}
changevc(0);
restdebugcpu();
iret();
}
void exception2()
{
regs *dump;
exception_stack_noerror *caller;
u32 *oldesp;
savecpu_noerror(dump, caller, oldesp);
cpuerror("NMI Non-maskable hardware interrupt", dump);
}
void exception3()
{
regs *dump;
exception_stack_noerror *caller;
u32 *oldesp;
savecpu_noerror(dump, caller, oldesp);
cpuerror("#BP INT3 instruction", dump);
}
void exception4()
{
regs *dump;
exception_stack_noerror *caller;
u32 *oldesp;
savecpu_noerror(dump, caller, oldesp);
cpuerror("#OF INTO instruction detected overflow", dump);
}
void exception5()
{
regs *dump;
exception_stack_noerror *caller;
u32 *oldesp;
savecpu_noerror(dump, caller, oldesp);
cpuerror("#BR BOUND instruction detected overrange", dump);
}
void exception6()
{
regs *dump;
exception_stack_noerror *caller;
u32 *oldesp;
savecpu_noerror(dump, caller, oldesp);
cpuerror("#UD Invalid instruction opcode", dump);
}
void exception7()
{
regs *dump;
exception_stack_noerror *caller;
u32 *oldesp;
savecpu_noerror(dump, caller, oldesp);
cpuerror("#NM No coprocessor", dump);
}
void exception8()
{
regs *dump;
exception_stack_noerror *caller;
u32 *oldesp;
savecpu_noerror(dump, caller, oldesp);
cpuerror("#DF Double fault", dump);
}
void exception9()
{
regs *dump;
exception_stack_noerror *caller;
u32 *oldesp;
savecpu_noerror(dump, caller, oldesp);
cpuerror("Coprocessor segment overrun", dump);
}
void exception10()
{
regs *dump;
exception_stack_noerror *caller;
u32 *oldesp;
savecpu_noerror(dump, caller, oldesp);
cpuerror("#TS Invalid task state segment (TSS)", dump);
}
void exception11()
{
regs *dump;
exception_stack_noerror *caller;
u32 *oldesp;
savecpu_noerror(dump, caller, oldesp);
cpuerror("#NP Segment not present", dump);
}
void exception12()
{
regs *dump;
exception_stack_noerror *caller;
u32 *oldesp;
savecpu_noerror(dump, caller, oldesp);
cpuerror("#SS Stack fault", dump);
}
void exception13()
{
regs *dump;
exception_stack *caller;
u32 *oldesp;
savecpu(dump, caller, oldesp);
cpuerror("#GP General protection fault (GPF)", dump);
}
static u8 ex14_errors1[] =
"Supervisory process tried to read a non-present page entry";
static u8 ex14_errors2[] =
"Supervisory process tried to read a page and caused a protection fault";
static u8 ex14_errors3[] =
"Supervisory process tried to write to a non-present page entry";
static u8 ex14_errors4[] =
"Supervisory process tried to write a page and caused a protection fault";
static u8 ex14_errors5[] =
"User process tried to read a non-present page entry";
static u8 ex14_errors6[] =
"User process tried to read a page and caused a protection fault";
static u8 ex14_errors7[] =
"User process tried to write to a non-present page entry";
static u8 ex14_errors8[] =
"User process tried to write a page and caused a protection fault";
static u8 *ex14_errors[] =
{ &ex14_errors1, &ex14_errors2, &ex14_errors3, &ex14_errors4,
&ex14_errors5, &ex14_errors6, &ex14_errors7, &ex14_errors8
};
void exception14()
{
regs *dump;
exception_stack *caller;
u32 *oldesp;
getEBP(oldesp);
dumpcpu();
getESP(dump);
caller = (exception_stack *) (oldesp + 1);
dump->ebp = *oldesp;
dump->eip = caller->eip;
dump->cs = caller->cs;
if (caller->cs == SEL_KERNEL_CODE)
dump->esp = (u32) oldesp + sizeof(exception_stack);
else
{
dump->esp = (u32) ((exception_stack_user *) caller)->esp;
dump->ss = (u32) ((exception_stack_user *) caller)->ss;
}
if (dump->cr2 >= USER_CODE && dump->cr2 < USER_STACK)
{
virtual_range_new(getcurrentprocess()->pdd,
(u8 *) (dump->cr2 & 0xFFFFF000),
PAGESIZE, PAGE_ALL);
}
else
{
printf("Page fault - %s at adress %Y cs:eip - %Y:%Y\r\n",
ex14_errors[caller->error_code & 0xF], dump->cr2,
dump->cs, dump->eip);
cpuerror("#PGF Page fault", dump);
}
restdebugcpu();
iret();
}
void exception15()
{
regs *dump;
exception_stack_noerror *caller;
u32 *oldesp;
savecpu_noerror(dump, caller, oldesp);
cpuerror("(reserved)", dump);
}
void exception16()
{
regs *dump;
exception_stack_noerror *caller;
u32 *oldesp;
savecpu_noerror(dump, caller, oldesp);
cpuerror("#MF Coprocessor error", dump);
}
void exception17()
{
regs *dump;
exception_stack_noerror *caller;
u32 *oldesp;
savecpu_noerror(dump, caller, oldesp);
cpuerror("#AC Alignment check", dump);
}
void exception18()
{
regs *dump;
exception_stack_noerror *caller;
u32 *oldesp;
savecpu_noerror(dump, caller, oldesp);
cpuerror("#MC Machine check", dump);
}
/******************************************************************************/
/* Les IRQ par défaut */
void irq0()
{
cli();
pushf();
pushad();
print("irq 0");
irqendmaster();
popad();
popf();
sti();
leave();
iret();
}
void irq1()
{
cli();
pushf();
pushad();
print("irq 1");
while ((inb(0x64) & 1) == 0);
inb(0x60);
irqendmaster();
popad();
popf();
sti();
leave();
iret();
}
void irq2()
{
cli();
pushf();
pushad();
print("irq 2");
irqendmaster();
popad();
popf();
sti();
leave();
iret();
}
void irq3()
{
cli();
pushf();
pushad();
print("irq 3");
irqendmaster();
popad();
popf();
sti();
leave();
iret();
}
void irq4()
{
cli();
pushf();
pushad();
print("irq 4");
irqendmaster();
popad();
popf();
sti();
leave();
iret();
}
void irq5()
{
cli();
pushf();
pushad();
print("irq 5");
irqendmaster();
popad();
popf();
sti();
leave();
iret();
}
void irq6()
{
cli();
pushf();
pushad();
print("irq 6");
irqendmaster();
popad();
popf();
sti();
leave();
iret();
}
void irq7()
{
cli();
pushf();
pushad();
print("irq 7");
irqendmaster();
popad();
popf();
sti();
leave();
iret();
}
void irq8()
{
cli();
pushf();
pushad();
print("irq 8");
irqendslave();
irqendmaster();
popad();
popf();
sti();
leave();
iret();
}
void irq9()
{
cli();
pushf();
pushad();
print("irq 9");
irqendslave();
irqendmaster();
popad();
popf();
sti();
leave();
iret();
}
void irq10()
{
cli();
pushf();
pushad();
print("irq 10");
irqendslave();
irqendmaster();
popad();
popf();
sti();
leave();
iret();
}
void irq11()
{
cli();
pushf();
pushad();
print("irq 11");
irqendslave();
irqendmaster();
popad();
popf();
sti();
leave();
iret();
}
void irq12()
{
cli();
pushf();
pushad();
print("irq 12");
while ((inb(0x64) & 1) == 0);
inb(0x60);
irqendslave();
irqendmaster();
popad();
popf();
sti();
leave();
iret();
}
void irq13()
{
cli();
pushf();
pushad();
print("irq 13");
irqendslave();
irqendmaster();
popad();
popf();
sti();
leave();
iret();
}
void irq14()
{
cli();
pushf();
pushad();
print("irq 14");
irqendslave();
irqendmaster();
popad();
popf();
sti();
leave();
iret();
}
void irq15()
{
cli();
print("irq 15");
irqendslave();
irqendmaster();
popad();
popf();
sti();
leave();
iret();
}
/******************************************************************************/
/* Initialise une IDT */
void initidt(void)
{
u16 i;
putidt((u32) exception0, SEL_KERNEL_CODE,
ENTRY_PRESENT | ENTRY_RING0 | INTGATE, 0);
putidt((u32) exception1, SEL_KERNEL_CODE,
ENTRY_PRESENT | ENTRY_RING0 | INTGATE, 1);
putidt((u32) exception2, SEL_KERNEL_CODE,
ENTRY_PRESENT | ENTRY_RING0 | INTGATE, 2);
putidt((u32) exception3, SEL_KERNEL_CODE,
ENTRY_PRESENT | ENTRY_RING0 | INTGATE, 3);
putidt((u32) exception4, SEL_KERNEL_CODE,
ENTRY_PRESENT | ENTRY_RING0 | INTGATE, 4);
putidt((u32) exception5, SEL_KERNEL_CODE,
ENTRY_PRESENT | ENTRY_RING0 | INTGATE, 5);
putidt((u32) exception6, SEL_KERNEL_CODE,
ENTRY_PRESENT | ENTRY_RING0 | INTGATE, 6);
putidt((u32) exception7, SEL_KERNEL_CODE,
ENTRY_PRESENT | ENTRY_RING0 | INTGATE, 7);
putidt((u32) exception8, SEL_KERNEL_CODE,
ENTRY_PRESENT | ENTRY_RING0 | INTGATE, 8);
putidt((u32) exception9, SEL_KERNEL_CODE,
ENTRY_PRESENT | ENTRY_RING0 | INTGATE, 9);
putidt((u32) exception10, SEL_KERNEL_CODE,
ENTRY_PRESENT | ENTRY_RING0 | INTGATE, 10);
putidt((u32) exception11, SEL_KERNEL_CODE,
ENTRY_PRESENT | ENTRY_RING0 | INTGATE, 11);
putidt((u32) exception12, SEL_KERNEL_CODE,
ENTRY_PRESENT | ENTRY_RING0 | INTGATE, 12);
putidt((u32) exception13, SEL_KERNEL_CODE,
ENTRY_PRESENT | ENTRY_RING0 | INTGATE, 13);
putidt((u32) exception14, SEL_KERNEL_CODE,
ENTRY_PRESENT | ENTRY_RING0 | INTGATE, 14);
putidt((u32) exception15, SEL_KERNEL_CODE,
ENTRY_PRESENT | ENTRY_RING0 | INTGATE, 15);
putidt((u32) exception16, SEL_KERNEL_CODE,
ENTRY_PRESENT | ENTRY_RING0 | INTGATE, 16);
putidt((u32) exception17, SEL_KERNEL_CODE,
ENTRY_PRESENT | ENTRY_RING0 | INTGATE, 17);
putidt((u32) exception18, SEL_KERNEL_CODE,
ENTRY_PRESENT | ENTRY_RING0 | INTGATE, 18);
for (i = 19; i < 32; i++)
{
putidt((u32) interruption, SEL_KERNEL_CODE,
ENTRY_PRESENT | ENTRY_RING3 | TRAPGATE, i);
}
putidt((u32) irq0, SEL_KERNEL_CODE,
ENTRY_PRESENT | ENTRY_RING0 | INTGATE, 32);
putidt((u32) irq1, SEL_KERNEL_CODE,
ENTRY_PRESENT | ENTRY_RING0 | INTGATE, 33);
putidt((u32) irq2, SEL_KERNEL_CODE,
ENTRY_PRESENT | ENTRY_RING0 | INTGATE, 34);
putidt((u32) irq3, SEL_KERNEL_CODE,
ENTRY_PRESENT | ENTRY_RING0 | INTGATE, 35);
putidt((u32) irq4, SEL_KERNEL_CODE,
ENTRY_PRESENT | ENTRY_RING0 | INTGATE, 36);
putidt((u32) irq5, SEL_KERNEL_CODE,
ENTRY_PRESENT | ENTRY_RING0 | INTGATE, 37);
putidt((u32) irq6, SEL_KERNEL_CODE,
ENTRY_PRESENT | ENTRY_RING0 | INTGATE, 38);
putidt((u32) irq7, SEL_KERNEL_CODE,
ENTRY_PRESENT | ENTRY_RING0 | INTGATE, 39);
for (i = 40; i < 96; i++)
{
putidt((u32) interruption, SEL_KERNEL_CODE,
ENTRY_PRESENT | ENTRY_RING3 | TRAPGATE, i);
}
putidt((u32) irq8, SEL_KERNEL_CODE,
ENTRY_PRESENT | ENTRY_RING0 | INTGATE, 96);
putidt((u32) irq9, SEL_KERNEL_CODE,
ENTRY_PRESENT | ENTRY_RING0 | INTGATE, 97);
putidt((u32) irq10, SEL_KERNEL_CODE,
ENTRY_PRESENT | ENTRY_RING0 | INTGATE, 98);
putidt((u32) irq11, SEL_KERNEL_CODE,
ENTRY_PRESENT | ENTRY_RING0 | INTGATE, 99);
putidt((u32) irq12, SEL_KERNEL_CODE,
ENTRY_PRESENT | ENTRY_RING0 | INTGATE, 100);
putidt((u32) irq13, SEL_KERNEL_CODE,
ENTRY_PRESENT | ENTRY_RING0 | INTGATE, 101);
putidt((u32) irq14, SEL_KERNEL_CODE,
ENTRY_PRESENT | ENTRY_RING0 | INTGATE, 102);
putidt((u32) irq15, SEL_KERNEL_CODE,
ENTRY_PRESENT | ENTRY_RING0 | INTGATE, 103);
for (i = 104; i < IDT_SIZE; i++)
{
putidt((u32) interruption, SEL_KERNEL_CODE,
ENTRY_PRESENT | ENTRY_RING0 | TRAPGATE, i);
}
/* initialise le registre idt */
idtreg.limite = IDT_SIZE * sizeof(idtdes);
idtreg.base = IDT_ADDR;
/* recopie de la IDT a son adresse */
memcpy(&idt, (u8 *) idtreg.base, idtreg.limite, 1);
/* chargement du registre IDTR */
lidt(&idtreg);
}
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/******************************************************************************/
/* 8253/8254 PIT (Programmable Interval Timer) Timer ajustable */
void inittimer(void)
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{
u32 divisor = TIMER_FREQ / HZ;
outb(TIMER_MODE, RATE_GENERATOR);
outb(TIMER0, (u8) divisor);
outb(TIMER0, (u8) (divisor >> 8));
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}
/*******************************************************************************/