#include #include #include #include #define MPIC_CMD 0x0020 #define MPIC_DATA 0x0021 #define SPIC_CMD 0x00A0 #define SPIC_DATA 0x00A1 #define PIC_CMD_INIT 0x10 #define PIC_CMD_EXTRA 0x01 #define PIC_CMD_8086 0x01 #define PIC_CMD_EOI 0x20 unsigned int irq_map[] = {0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23}; void pic_init() { // Send initialize command outb(MPIC_CMD, PIC_CMD_INIT | PIC_CMD_EXTRA); outb(SPIC_CMD, PIC_CMD_INIT | PIC_CMD_EXTRA); // Remap offsets outb(MPIC_DATA, INT_IRQ0); outb(SPIC_DATA, INT_IRQ8); // Setup slave PIC outb(MPIC_DATA, 0x04); outb(SPIC_DATA, 0x02); // Extra environment data outb(MPIC_DATA, PIC_CMD_8086); outb(SPIC_DATA, PIC_CMD_8086); // Mask all interrupts outb(MPIC_DATA, 0xFF); outb(SPIC_DATA, 0xFF); }