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feat: ensemble de fonctions permettant la gestion des IRQs et des interruptions en mode protégé

This commit is contained in:
Nicolas Hordé 2007-04-02 13:20:26 +00:00
parent ff555b167a
commit 1652e1239c
1 changed files with 36 additions and 0 deletions
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36
lib/irq.c Normal file
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void setpic(void)
{
/* MASTER */
/* Initialisation de ICW1 */
outbp(0x20,0x11);
/* Initialisation de ICW2 - vecteur de depart = 32 */
outbp(0x21,0x20);
/* Initialisation de ICW3 */
outbp(0x21,0x04);
/* Initialisation de ICW4 */
outbp(0x21,0x01);
/* masquage des interruptions */
outbp(0x21,0xFF);
/* SLAVE */
/* Initialisation de ICW1 */
outbp(0xA0,0x11);
/* Initialisation de ICW2 - vecteur de depart = 96 */
outbp(0xA1,0x70);
/* Initialisation de ICW3 */
outbp(0xA1,0x02);
/* Initialisation de ICW4 */
outbp(0xA1,0x01);
/* masquage des interruptions */
outbp(0xA1,0xFF);
/* Demasquage des irqs */
outbp(0x21,0xFD);
}
void makeidtdesc(u32 offset, u16 select, u16 type, idtdesc* desc)
{
desc->offset0_15 = (offset & 0xffff);
desc->select = select;
desc->type = type;
desc->offset16_31 = (offset & 0xffff0000) >> 16;
return;
}