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//
// pic.h
//
// Programmable Interrupt Controller (PIC i8259)
//
// Copyright (C) 2002 Michael Ringgaard. All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions
// are met:
//
// 1. Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// 2. Redistributions in binary form must reproduce the above copyright
// notice, this list of conditions and the following disclaimer in the
// documentation and/or other materials provided with the distribution.
// 3. Neither the name of the project nor the names of its contributors
// may be used to endorse or promote products derived from this software
// without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE
// FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
// DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
// OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
// HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
// LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
// OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
// SUCH DAMAGE.
//
#ifndef PIC_H
#define PIC_H
//
// I/O port addresses
//
#define PIC_MSTR_CTRL 0x20
#define PIC_MSTR_MASK 0x21
#define PIC_SLV_CTRL 0xA0
#define PIC_SLV_MASK 0xA1
//
// Master commands
//
#define PIC_MSTR_ICW1 0x11
#define PIC_MSTR_ICW2 0x20
#define PIC_MSTR_ICW3 0x04
#define PIC_MSTR_ICW4 0x01
//
// Slave commands
//
#define PIC_SLV_ICW1 0x11
#define PIC_SLV_ICW2 0x28
#define PIC_SLV_ICW3 0x02
#define PIC_SLV_ICW4 0x01
//
// End of interrupt commands
//
#define PIC_EOI_BASE 0x60
#define PIC_EOI_CAS 0x62
#define PIC_EOI_FD 0x66
void init_pic();
krnlapi void enable_irq(unsigned int irq);
krnlapi void disable_irq(unsigned int irq);
krnlapi void eoi(unsigned int irq);
#endif