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Follow http://wiki.osdev.org/PIC

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This commit is contained in:
Braiden Vasco 2017-11-06 10:41:28 +00:00
parent cb4ebffe88
commit 91c323b7c8
1 changed files with 7 additions and 2 deletions
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9
arch/pic.c
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@ -13,6 +13,10 @@ void pic_remap(const unsigned char master_irq_start, const unsigned char slave_i
{
logger_info_from("pic", "Remap the IRQ table.");
// Save masks
unsigned char master_mask = inportb(PIC_MASTER_DATA);
unsigned char slave_mask = inportb(PIC_SLAVE_DATA);
// Start the initialization sequence
outportb(PIC_MASTER_COMMAND, 0x11);
outportb(PIC_SLAVE_COMMAND, 0x11);
@ -29,6 +33,7 @@ void pic_remap(const unsigned char master_irq_start, const unsigned char slave_i
outportb(PIC_MASTER_DATA, 0x01);
outportb(PIC_SLAVE_DATA, 0x01);
outportb(PIC_MASTER_DATA, 0x00);
outportb(PIC_SLAVE_DATA, 0x00);
// Restore masks
outportb(PIC_MASTER_DATA, master_mask);
outportb(PIC_SLAVE_DATA, slave_mask);
}