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/*
* Copyright (c) 2023-2025 Ian Marco Moffett and the Osmora Team.
* 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 Hyra 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 _MACHINE_INTR_H_
#define _MACHINE_INTR_H_ 1
#include <sys/types.h>
#define IPL_NONE 0x00
/* Upper 4 bits of an interrupt vector */
#define IPL_SHIFT 4
/*
* Represents an interrupt handler, this is split up into
* two parts. One side is only meant for the driver and C
* interrupt code to see, and the other shall be visible
* for the lower level interrupt handling code in vector.S
*
* @hand: Driver-specific handler to invoke [D]
* --
* @name: Name of interrupt : strdup()'d [D]
* @ipl: Interrupt priority level [D]
* @irq: IRQ number to use [D]
* @vector: Interrupt vector result [I]
* @count: Interrupt count [I]
*
* [D]: Set by driver
* [I]: Set internally
*/
struct intr_hand {
/* -- shared between vector.S -- */
int(*hand)(struct intr_hand *hp);
/* -- private to driver and C -- */
char *name;
int8_t ipl;
uint8_t irq;
uint8_t vector;
uint32_t count;
};
/*
* Register an interrupt with a specific priority
*
* @ih: Interrupt handler to register
*
* Returns new interrupt handler on success,
* otherwise NULL on failure
*/
struct intr_hand *intr_register(const struct intr_hand *ih);
#endif /* !_MACHINE_INTR_H_ */
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