/*
 * Copyright 2003-2010, Axel Dörfler, axeld@pinc-software.de.
 * Distributed under the terms of the MIT License.
 *
 * Copyright 2001-2002, Travis Geiselbrecht. All rights reserved.
 * Distributed under the terms of the NewOS License.
 */
#ifndef _KERNEL_INTERRUPTS_H
#define _KERNEL_INTERRUPTS_H


#include <KernelExport.h>
#include <arch/int.h>

#include <util/list.h>

// private install_io_interrupt_handler() flags
#define B_NO_LOCK_VECTOR        0x100
#define B_NO_HANDLED_INFO       0x200

struct kernel_args;


enum interrupt_type {
        INTERRUPT_TYPE_EXCEPTION,
        INTERRUPT_TYPE_IRQ,
        INTERRUPT_TYPE_LOCAL_IRQ,
        INTERRUPT_TYPE_SYSCALL,
        INTERRUPT_TYPE_ICI,
        INTERRUPT_TYPE_UNKNOWN
};

struct irq_assignment {
        list_link       link;

        uint32          irq;
        uint32          count;

        int32           handlers_count;

        int32           load;
        int32           cpu;
};


#ifdef __cplusplus
extern "C" {
#endif

status_t interrupts_init(struct kernel_args* args);
status_t interrupts_init_post_vm(struct kernel_args* args);
status_t interrupts_init_io(struct kernel_args* args);
status_t interrupts_init_post_device_manager(struct kernel_args* args);
int io_interrupt_handler(int vector, bool levelTriggered);

bool interrupts_enabled(void);

static inline void
enable_interrupts(void)
{
        arch_int_enable_interrupts();
}

static inline bool
are_interrupts_enabled(void)
{
        return arch_int_are_interrupts_enabled();
}

#ifdef __cplusplus
}
#endif


// map those directly to the arch versions, so they can be inlined
#define disable_interrupts()            arch_int_disable_interrupts()
#define restore_interrupts(status)      arch_int_restore_interrupts(status)


status_t reserve_io_interrupt_vectors(int32 count, int32 startVector,
        enum interrupt_type type);
status_t allocate_io_interrupt_vectors(int32 count, int32 *startVector,
        enum interrupt_type type);
void free_io_interrupt_vectors(int32 count, int32 startVector);

void assign_io_interrupt_to_cpu(int32 vector, int32 cpu);


#endif /* _KERNEL_INTERRUPTS_H */