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// Helpers for working with i8259 interrupt controller.
//
// Copyright (C) 2008 Kevin O'Connor <kevin@koconnor.net>
// Copyright (C) 2002 MandrakeSoft S.A.
//
// This file may be distributed under the terms of the GNU LGPLv3 license.
#ifndef __PIC_H
#define __PIC_H
#include "ioport.h" // PORT_PIC*
#include "farptr.h" // struct segoff_s
// PORT_PIC1 bitdefs
#define PIC1_IRQ0 (1<<0)
#define PIC1_IRQ1 (1<<1)
#define PIC1_IRQ2 (1<<2)
#define PIC1_IRQ5 (1<<5)
#define PIC1_IRQ6 (1<<6)
// PORT_PIC2 bitdefs
#define PIC2_IRQ8 (1<<8)
#define PIC2_IRQ12 (1<<12)
#define PIC2_IRQ13 (1<<13)
#define PIC2_IRQ14 (1<<14)
#define PIC_IRQMASK_DEFAULT ((u16)~PIC1_IRQ2)
#define BIOS_HWIRQ0_VECTOR 0x08
#define BIOS_HWIRQ8_VECTOR 0x70
static inline void
pic_eoi1(void)
{
// Send eoi (select OCW2 + eoi)
outb(0x20, PORT_PIC1_CMD);
}
static inline void
pic_eoi2(void)
{
// Send eoi (select OCW2 + eoi)
outb(0x20, PORT_PIC2_CMD);
pic_eoi1();
}
u16 pic_irqmask_read(void);
void pic_irqmask_write(u16 mask);
void pic_irqmask_mask(u16 off, u16 on);
void pic_reset(u8 irq0, u8 irq8);
void pic_setup(void);
void enable_hwirq(int hwirq, struct segoff_s func);
#endif // pic.h