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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.

 */

#ifndef __ia32_INTERRUPT_H__

#define __ia32_INTERRUPT_H__

#include <arch/types.h>

#include <arch/pm.h>

#define IVT_ITEMS       IDT_ITEMS

#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_PIC_SPUR     (IVT_IRQBASE+IRQ_PIC_SPUR)

#define VECTOR_CLK      (IVT_IRQBASE+IRQ_CLK)

#define VECTOR_KBD      (IVT_IRQBASE+IRQ_KBD)

#define VECTOR_SYSCALL          (IVT_FREEBASE+0)

#define VECTOR_TLB_SHOOTDOWN_IPI    (IVT_FREEBASE+1)

#define VECTOR_DEBUG_IPI                (IVT_FREEBASE+2)

struct istate {

    __u32 eax;

    __u32 ecx;

    __u32 edx;

    __u32 esi;

    __u32 edi;

    __u32 ebp;

    __u32 ebx;

    __u32 gs;

    __u32 fs;

    __u32 es;

    __u32 ds;

    __u32 error_word;

    __u32 eip;

    __u32 cs;

    __u32 eflags;

    __u32 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, __address retaddr)

{

    istate->eip = retaddr;

}

static inline __native istate_get_pc(istate_t *istate)

{

    return istate->eip;

}

extern void (* disable_irqs_function)(__u16 irqmask);

extern void (* enable_irqs_function)(__u16 irqmask);

extern void (* eoi_function)(void);

extern void PRINT_INFO_ERRCODE(istate_t *istate);

extern void null_interrupt(int n, istate_t *istate);

extern void gp_fault(int n, istate_t *istate);

extern void nm_fault(int n, istate_t *istate);

extern void ss_fault(int n, istate_t *istate);

extern void simd_fp_exception(int n, istate_t *istate);

extern void syscall(int n, istate_t *istate);

extern void tlb_shootdown_ipi(int n, istate_t *istate);

extern void trap_virtual_enable_irqs(__u16 irqmask);

extern void trap_virtual_disable_irqs(__u16 irqmask);

extern void trap_virtual_eoi(void);

#endif