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/*

 * Copyright (C) 2001-2004 Jakub Jermar

 * All rights reserved.

 *

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions

 * are met:

 *

 * - Redistributions of source code must retain the above copyright

 *   notice, this list of conditions and the following disclaimer.

 * - 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.

 * - The name of the author may not be used to endorse or promote products

 *   derived from this software without specific prior written permission.

 *

 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.

 */

/** @addtogroup ia32interrupt

 * @{

 */

/** @file

 */

#ifndef KERN_ia32_INTERRUPT_H_

#define KERN_ia32_INTERRUPT_H_

#include <arch/types.h>

#include <arch/pm.h>

#define IVT_ITEMS       IDT_ITEMS

#define IVT_FIRST       0

#define EXC_COUNT   32

#define IRQ_COUNT   16

#define IVT_EXCBASE     0

#define IVT_IRQBASE     (IVT_EXCBASE + EXC_COUNT)

#define IVT_FREEBASE    (IVT_IRQBASE + IRQ_COUNT)

#define IRQ_CLK         0

#define IRQ_KBD         1

#define IRQ_PIC1        2

#define IRQ_PIC_SPUR    7

/* this one must have four least significant bits set to ones */

#define VECTOR_APIC_SPUR    (IVT_ITEMS - 1)

#if (((VECTOR_APIC_SPUR + 1) % 16) || VECTOR_APIC_SPUR >= IVT_ITEMS)

#error Wrong definition of VECTOR_APIC_SPUR

#endif

#define VECTOR_DEBUG                1

#define VECTOR_CLK                  (IVT_IRQBASE + IRQ_CLK)

#define VECTOR_PIC_SPUR             (IVT_IRQBASE + IRQ_PIC_SPUR)

#define VECTOR_SYSCALL              IVT_FREEBASE

#define VECTOR_TLB_SHOOTDOWN_IPI    (IVT_FREEBASE + 1)

#define VECTOR_DEBUG_IPI            (IVT_FREEBASE + 2)

struct istate {

    uint32_t eax;

    uint32_t ecx;

    uint32_t edx;

    uint32_t esi;

    uint32_t edi;

    uint32_t ebp;

    uint32_t ebx;

    uint32_t gs;

    uint32_t fs;

    uint32_t es;

    uint32_t ds;

    uint32_t error_word;

    uint32_t eip;

    uint32_t cs;

    uint32_t eflags;

    uint32_t stack[];

};

/** Return true if exception happened while in userspace */

static inline int istate_from_uspace(istate_t *istate)

{

    return !(istate->eip & 0x80000000);

}

static inline void istate_set_retaddr(istate_t *istate, uintptr_t retaddr)

{

    istate->eip = retaddr;

}

static inline unative_t istate_get_pc(istate_t *istate)

{

    return istate->eip;

}

extern void (* disable_irqs_function)(uint16_t irqmask);

extern void (* enable_irqs_function)(uint16_t irqmask);

extern void (* eoi_function)(void);

extern void decode_istate(istate_t *istate);

extern void interrupt_init(void);

extern void trap_virtual_enable_irqs(uint16_t irqmask);

extern void trap_virtual_disable_irqs(uint16_t irqmask);

#endif

/** @}

 */