irq_controller.h

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/*
 * Copyright (c) 2016, Xilinx Inc. and Contributors. All rights reserved.
 *
 * SPDX-License-Identifier: BSD-3-Clause
 */
 
/*
 * @file        irq.h
 * @brief       Interrupt handling primitives for libmetal.
 */
 
#ifndef __METAL_IRQ_CONTROLLER__H__
#define __METAL_IRQ_CONTROLLER__H__
 
#ifdef __cplusplus
extern "C" {
#endif
 
#include <metal/irq.h>
#include <metal/list.h>
#include <stdlib.h>
 
#define METAL_IRQ_ANY         (-1)
 
#define METAL_IRQ_DISABLE    0U
#define METAL_IRQ_ENABLE     1U
 
struct metal_irq_controller;
 
typedef void (*metal_irq_set_enable) (struct metal_irq_controller *irq_cntr,
                                     int irq, unsigned int enable);
 
typedef int (*metal_cntr_irq_register) (struct metal_irq_controller *irq_cntr,
                                        int irq, metal_irq_handler hd,
                                        void *arg);
 
struct metal_irq {
        metal_irq_handler hd; 
        void *arg; 
};
 
struct metal_irq_controller {
        int irq_base; 
        int irq_num; 
        void *arg; 
        metal_irq_set_enable irq_set_enable; 
        metal_cntr_irq_register irq_register; 
        struct metal_list node; 
        struct metal_irq *irqs; 
};
 
#define METAL_IRQ_CONTROLLER_DECLARE(_irq_controller, \
                                     _irq_base, _irq_num, \
                                     _arg, \
                                     _irq_set_enable, \
                                     _irq_register, \
                                     _irqs) \
        struct metal_irq_controller _irq_controller = { \
                .irq_base = _irq_base, \
                .irq_num = _irq_num, \
                .arg = _arg, \
                .irq_set_enable = _irq_set_enable, \
                .irq_register = _irq_register, \
                .irqs = _irqs,\
        }
 
int metal_irq_register_controller(struct metal_irq_controller *cntr);
 
static inline
int metal_irq_handle(struct metal_irq *irq_data, int irq)
{
        if (irq_data && irq_data->hd) {
                return irq_data->hd(irq, irq_data->arg);
        } else {
                return METAL_IRQ_NOT_HANDLED;
        }
}
 
#ifdef __cplusplus
}
#endif
 
#endif /* __METAL_IRQ__H__ */