interrupt.h

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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[];
};

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

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