pic.h

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/*
 * Copyright (c) 2014, Michael Müller
 * Copyright (c) 2014, Sebastian Lackner
 * 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.
 *
 * 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 _H_PIC_
#define _H_PIC_

#ifdef __KERNEL__

    #include <stdbool.h>
    #include <stdint.h>

    #define PIC1_PORT           0x20
    #define PIC2_PORT           0xA0
    #define PIC1_COMMAND_PORT   PIC1_PORT
    #define PIC1_DATA_PORT      (PIC1_PORT+1)
    #define PIC2_COMMAND_PORT   PIC2_PORT
    #define PIC2_DATA_PORT      (PIC2_PORT+1)

    #define ICW1_ICW4           0x01
    #define ICW1_SINGLE         0x02
    #define ICW1_INTERVAL4      0x04
    #define ICW1_LEVEL          0x08
    #define ICW1_INIT           0x10

    #define ICW4_8086           0x01
    #define ICW4_AUTO           0x02
    #define ICW4_BUF_SLAVE      0x08
    #define ICW4_BUF_MASTER     0x0C
    #define ICW4_SFNM           0x10

    #define PIC_EOI             0x20

    #define IRQ_COUNT           16

    #define IRQ_PIT         0 
    #define IRQ_KEYBOARD    1 
    #define IRQ_SLAVE       2 
    #define IRQ_COM2        3 
    #define IRQ_COM1        4 
    #define IRQ_LPT2        5 
    #define IRQ_FLOPPY      6 
    #define IRQ_LPT1        7 
    #define IRQ_CMOS_CLOCK  8 
    #define IRQ_PS2_MOUSE   12 
    #define IRQ_FPU         13 
    #define IRQ_ATA1        14 
    #define IRQ_ATA2        15 
    typedef uint32_t (*irq_callback)(uint32_t irq);

    void picInit(uint32_t interruptOffset);
    bool picReserveIRQ(uint32_t irq, irq_callback callback);
    void picFreeIRQ(uint32_t irq);

#endif

#endif /* _H_PIC_ */