106 lines
2.4 KiB
C
106 lines
2.4 KiB
C
/*******************************************************************************/
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/* COS2000 - Compatible Operating System - LGPL v3 - Hordé Nicolas */
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/* */
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#include "interrupts.h"
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#include "types.h"
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#include "asm.h"
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#include "memory.h"
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#include "timer.h"
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#include "vga.h"
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#include "gdt.h"
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#include "process.h"
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static u8 curs[4] = { "-\\|/" };
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static u8 curspos = 0;
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static u32 time = 0;
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/******************************************************************************/
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/* Récupère la valeur du timer */
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/* SYSCALL
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{
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"ID":4,
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"NAME":"getticks",
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"LIBRARY":"libsys",
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"INTERNALNAME":"gettimer",
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"DESCRIPTION":"Return the internal value of the timer",
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"ARGS": [],
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"RETURN":"u32"
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}
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END-SYSCALL */
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u32 gettimer(void)
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{
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return time;
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}
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/******************************************************************************/
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/* Handler d'interruption du timer IRQ 0 */
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__attribute__ ((noreturn)) void timer_handler(regs *dump)
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{
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exception_stack_noerror *caller = (exception_stack_noerror*) ((u32*)dump->esp+1);
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bool noerror,user;
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if ((caller->cs & 0xFFF8)==SEL_KERNEL_CODE || (caller->cs & 0xFFF8)==SEL_USER_CODE)
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{
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noerror=true;
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dump->eip = caller->eip;
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dump->cs = caller->cs;
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dump->eflags = caller->eflags;
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if ((dump->cs & 0xFFF8)==SEL_KERNEL_CODE)
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{
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dump->esp = (u32) caller + sizeof(exception_stack_noerror);
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user=false;
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}
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else
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{
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dump->esp = (u32) ((exception_stack_noerror_user*) caller)->esp;
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dump->ss = (u32) ((exception_stack_noerror_user*) caller)->ss;
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user=true;
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}
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}
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else
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{
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noerror=false;
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dump->eip = ((exception_stack*)caller)->eip;
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dump->cs = ((exception_stack*)caller)->cs;
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if ((dump->cs & 0xFFF8)==SEL_KERNEL_CODE)
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{
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dump->esp = (u32) caller + sizeof(exception_stack);
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user=false;
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}
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else
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{
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dump->esp = (u32) ((exception_stack_user*) caller)->esp;
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dump->ss = (u32) ((exception_stack_user*) caller)->ss;
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user=true;
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}
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}
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irqendmaster();
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showchar(0, 0, curs[curspos], 7);
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curspos = (curspos + 1) & 0x3;
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time++;
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task *new=getschedule();
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if (new!=NULL)
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{
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task *old=findcurrenttask();
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memcpy(dump, &old->dump, sizeof(regs), 0);
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switchtask(new->tid);
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}
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if ((dump->cs & 0xFFF8)==SEL_KERNEL_CODE)
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{
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setESP(dump);
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restcpu_kernel();
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}
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else
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{
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setESP(dump);
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restcpu_user();
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iret();
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}
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}
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/*******************************************************************************/
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