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/*
 * Copyright (C) 2005 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 ia64interrupt
 * @{
 */
/** @file
 */

#ifndef KERN_ia64_INTERRUPT_H_
#define KERN_ia64_INTERRUPT_H_

#include <typedefs.h>
#include <arch/types.h>
#include <arch/register.h>

/** ia64 has 256 INRs. */
#define INR_COUNT   256

/*
 * We need to keep this just to compile.
 * We might eventually move interrupt/ stuff
 * to genarch.
 */
#define IVT_ITEMS       0
#define IVT_FIRST       0

/** External Interrupt vectors. */
#define INTERRUPT_TIMER     255
#define INTERRUPT_SPURIOUS  15

/** General Exception codes. */
#define GE_ILLEGALOP        0
#define GE_PRIVOP       1
#define GE_PRIVREG      2
#define GE_RESREGFLD        3
#define GE_DISBLDISTRAN     4
#define GE_ILLEGALDEP       8

#define EOI 0        /**< The actual value doesn't matter. */

struct istate {
    __r128 f2;
    __r128 f3;
    __r128 f4;
    __r128 f5;
    __r128 f6;
    __r128 f7;
    __r128 f8;
    __r128 f9;
    __r128 f10;
    __r128 f11;
    __r128 f12;
    __r128 f13;
    __r128 f14;
    __r128 f15;
    __r128 f16;
    __r128 f17;
    __r128 f18;
    __r128 f19;
    __r128 f20;
    __r128 f21;
    __r128 f22;
    __r128 f23;
    __r128 f24;
    __r128 f25;
    __r128 f26;
    __r128 f27;
    __r128 f28;
    __r128 f29;
    __r128 f30;
    __r128 f31;
        
    uintptr_t ar_bsp;
    uintptr_t ar_bspstore;
    uintptr_t ar_bspstore_new;
    uint64_t ar_rnat;
    uint64_t ar_ifs;
    uint64_t ar_pfs;
    uint64_t ar_rsc;
    uintptr_t cr_ifa;
    cr_isr_t cr_isr;
    uintptr_t cr_iipa;
    psr_t cr_ipsr;
    uintptr_t cr_iip;
    uint64_t pr;
    uintptr_t sp;
    
    /*
     * The following variables are defined only for break_instruction handler. 
     */
    uint64_t in0;
    uint64_t in1;
    uint64_t in2;
    uint64_t in3;
    uint64_t in4;
};

static inline void istate_set_retaddr(istate_t *istate, uintptr_t retaddr)
{
    istate->cr_iip = retaddr;
    istate->cr_ipsr.ri = 0;     /* return to instruction slot #0 */
}

static inline unative_t istate_get_pc(istate_t *istate)
{
    return istate->cr_iip;
}

static inline int istate_from_uspace(istate_t *istate)
{
    return (istate->cr_iip) < 0xe000000000000000ULL;
}

extern void *ivt;

extern void general_exception(uint64_t vector, istate_t *istate);
extern int break_instruction(uint64_t vector, istate_t *istate);
extern void universal_handler(uint64_t vector, istate_t *istate);
extern void nop_handler(uint64_t vector, istate_t *istate);
extern void external_interrupt(uint64_t vector, istate_t *istate);
extern void disabled_fp_register(uint64_t vector, istate_t *istate);

#endif

/** @}
 */