nes-proj/cpu/x86/drivers/legacy_pc/shared-isr.h

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/*
* Copyright (C) 2016, Intel Corporation. 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 the copyright holder 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 HOLDER 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 CPU_X86_DRIVERS_LEGACY_PC_SHARED_ISR_H_
#define CPU_X86_DRIVERS_LEGACY_PC_SHARED_ISR_H_
#include <stdbool.h>
#include "pci.h"
/**
* The handler function should return true if and only if it handled the
* interrupt.
*/
typedef bool (*shared_isr_handler_t)(void);
typedef struct shared_isr_client {
uint8_t irq;
IRQAGENT agent;
INTR_PIN pin;
PIRQ pirq;
shared_isr_handler_t handler;
} shared_isr_client_t;
/* Unlike a non-shared interrupt handler function, an individual interrupt
* handler for a shared interrupt must not issue an EOI. The EOI is issued by
* the shared-isr subsystem.
*/
#define DEFINE_SHARED_IRQ(irq_, agent_, pin_, pirq_, handler_) \
static struct shared_isr_client \
__attribute__((used, section(".shared_isr_data"))) _shared_irq_##irq_ = { \
.irq = irq_, \
.agent = agent_, \
.pin = pin_, \
.pirq = pirq_, \
.handler = handler_ \
}
void shared_isr_init(void);
#endif /* CPU_X86_DRIVERS_LEGACY_PC_SHARED_ISR_H_ */