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/*
* Copyright (c) 2017 Richard Braun.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*
* Machine-independent interrupt management.
*/
#ifndef KERN_INTR_H
#define KERN_INTR_H
#include <kern/init.h>
/*
* Type for interrupt handler functions.
*
* Return codes :
* - 0 Interrupt successfully handled
* - EAGAIN Spurious interrupt
*/
typedef int (*intr_handler_fn_t)(void *arg);
/*
* Operations of an interrupt controller.
*
* Operations for interrupts targeting the same processor are serialized.
*/
struct intr_ops {
void (*enable)(void *priv, unsigned int intr, unsigned int cpu);
void (*disable)(void *priv, unsigned int intr);
void (*eoi)(void *priv, unsigned int intr);
};
/*
* Register an interrupt controller.
*
* This function isn't thread-safe and can only be called during system
* initialization.
*/
void intr_register_ctl(const struct intr_ops *ops, void *priv,
unsigned int first_intr, unsigned int last_intr);
/*
* Register/unregister an interrupt handler.
*/
int intr_register(unsigned int intr, intr_handler_fn_t fn, void *arg);
void intr_unregister(unsigned int intr, intr_handler_fn_t fn);
/*
* Handle an interrupt.
*/
void intr_handle(unsigned int intr);
/*
* This init operation provides :
* - registration of interrupt controllers and handlers
*/
INIT_OP_DECLARE(intr_bootstrap);
/*
* This init operation provides :
* - all interrupt controllers have been registered
* - module fully initialized
*/
INIT_OP_DECLARE(intr_setup);
#endif /* KERN_INTR_H */
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