pic8259.h

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/*******************************************************************************/
/*  © Université de Lille, The Pip Development Team (2015-2021)                */
/*                                                                             */
/*  This software is a computer program whose purpose is to run a minimal,     */
/*  hypervisor relying on proven properties such as memory isolation.          */
/*                                                                             */
/*  This software is governed by the CeCILL license under French law and       */
/*  abiding by the rules of distribution of free software.  You can  use,      */
/*  modify and/ or redistribute the software under the terms of the CeCILL     */
/*  license as circulated by CEA, CNRS and INRIA at the following URL          */
/*  "http://www.cecill.info".                                                  */
/*                                                                             */
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/*  modify and redistribute granted by the license, users are provided only    */
/*  with a limited warranty  and the software's author,  the holder of the     */
/*  economic rights,  and the successive licensors  have only  limited         */
/*  liability.                                                                 */
/*                                                                             */
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/*  software by the user in light of its specific status of free software,     */
/*  that may mean  that it is complicated to manipulate,  and  that  also      */
/*  therefore means  that it is reserved for developers  and  experienced      */
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/*  same conditions as regards security.                                       */
/*                                                                             */
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/*******************************************************************************/

#ifndef PIC8259_H
#define PIC8259_H

#define PIC1        0x20    /* IO base address for master PIC */
#define PIC2        0xA0    /* IO base address for slave PIC */
#define PIC1_COMMAND    PIC1
#define PIC1_DATA   (PIC1+1)
#define PIC2_COMMAND    PIC2
#define PIC2_DATA   (PIC2+1)
#define ICW1_ICW4   0x01    /* ICW4 (not) needed */
#define ICW1_SINGLE 0x02    /* Single (cascade) mode */
#define ICW1_INTERVAL4  0x04    /* Call address interval 4 (8) */
#define ICW1_LEVEL  0x08    /* Level triggered (edge) mode */
#define ICW1_INIT   0x10    /* Initialization - required! */

#define ICW4_8086   0x01    /* 8086/88 (MCS-80/85) mode */
#define ICW4_AUTO   0x02    /* Auto (normal) EOI */
#define ICW4_BUF_SLAVE  0x08    /* Buffered mode/slave */
#define ICW4_BUF_MASTER 0x0C    /* Buffered mode/master */
#define ICW4_SFNM   0x10    /* Special fully nested (not) */
#define PIC_EOI     0x20

#endif