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idiolatrie |
/******************************************************************************
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* Interrupts *
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******************************************************************************
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* Copyright (C)2011 Mathias Hörtnagl <mathias.hoertnagl@gmail.com> *
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* *
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* This program is free software: you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation, either version 3 of the License, or *
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* (at your option) any later version. *
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* *
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* This program is distributed in the hope that it will be useful, *
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* but WITHOUT ANY WARRANTY; without even the implied warranty of *
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
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* GNU General Public License for more details. *
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* *
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* You should have received a copy of the GNU General Public License *
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* along with this program. If not, see <http://www.gnu.org/licenses/>. *
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******************************************************************************/
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#include "stddef.h"
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#ifndef _INTERRUPT_H
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#define _INTERRUPT_H
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/* Register a callback at line IRQ_X. */
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#define IRQ_PIT0 0
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#define IRQ_1 1
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#define IRQ_2 2
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#define IRQ_3 3
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#define IRQ_4 4
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#define IRQ_5 5
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#define IRQ_6 6
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#define IRQ_KEYB 7
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/* Enable or disable interrupt handling. */
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#define INTR_EN 0x0001 /* Global interrupt enable. */
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#define INTR_PIT0 0x0100 /* Possible interrupt line masks. */
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#define INTR_1 0x0200
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#define INTR_2 0x0400
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#define INTR_3 0x0800
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#define INTR_4 0x1000
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#define INTR_5 0x2000
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#define INTR_6 0x4000
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#define INTR_KEYB 0x8000
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/* Type definition for the interrupt callback routines. A callback routine is
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a function with no arguments and no return value. */
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typedef void (*callback)();
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/******************************************************************************
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* Status Register Operations *
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******************************************************************************/
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/* Set interrupts of mask. */
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extern void set_intr(ushort mask);
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/* Unset interrupts of mask. */
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extern void unset_intr(ushort mask);
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/******************************************************************************
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* Callback Functions *
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******************************************************************************/
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/* Set a interrupt callback to NULL. If a interrupt callback points to NULL,
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the interrupt will be ignored. */
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extern void register_callback(int irq_line, callback c);
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/* Call the interrupt routines one by one starting with the interrupt at INTR_0
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(or IRQ_0). Interrupts with NULL interrupt routines are ignored. */
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extern void free_callback(int irq_line);
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#endif
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