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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_
#include <sys/types.h>
#define IST_SCHED 1U
#define IST_HW_IRQ 2U
#define IST_SW_INT 3U
/* Upper 4 bits of interrupt vector */
#define IPL_SHIFT 4
/*
* Interrupt priority levels
*/
#define IPL_NONE 0 /* Don't defer anything */
#define IPL_BIO 1 /* Block I/O */
#define IPL_CLOCK 2 /* Clock */
#define IPL_HIGH 3 /* Defer everything */
struct intr_entry {
int priority;
};
/*
* Interrupt handler
*
* [r]: Required for intr_register()
* [o]: Not required for intr_register()
* [v]: Returned by intr_register()
*
* @func: The actual handler [r]
* @name: Interrupt name [v]
* @priority: Interrupt priority [r]
* @irq: Interrupt request number [o]
* @vector: Interrupt vector [v]
*
* XXX: `irq` can be set to -1 for MSI/MSI-X
* interrupts.
*
* XXX: `func` must be the first field in this
* structure so that it may be called through
* assembly.
*
* XXX: `ist' should usually be set to -1 but can be
* used if an interrupt requires its own stack.
*/
struct intr_hand {
int(*func)(void *);
char *name;
int priority;
int irq;
int vector;
};
void *intr_register(const char *name, const struct intr_hand *ih);
int splraise(uint8_t s);
void splx(uint8_t s);
#endif
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