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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.

 */

#include <arch/interrupt.h>

#include <print.h>

#include <debug.h>

#include <panic.h>

#include <arch/i8259.h>

#include <func.h>

#include <cpu.h>

#include <arch/asm.h>

#include <mm/tlb.h>

#include <arch.h>

#include <symtab.h>

/*

 * Interrupt and exception dispatching.

 */

static iroutine ivt[IVT_ITEMS];

void (* disable_irqs_function)(__u16 irqmask) = NULL;

void (* enable_irqs_function)(__u16 irqmask) = NULL;

void (* eoi_function)(void) = NULL;

#define PRINT_INFO_ERRCODE(x) { \

    char *symbol = get_symtab_entry(stack[1]); \

    if (!symbol) \

        symbol = ""; \

    printf("----------------EXCEPTION OCCURED----------------\n"); \

    printf("%%eip: %X (%s)\n",x[1],symbol); \

    printf("ERROR_WORD=%X\n", x[0]); \

    printf("%%cs=%X,flags=%X\n", x[2], x[3]); \

    printf("%%eax=%X, %%ebx=%X, %%ecx=%X, %%edx=%X\n",\

           x[-2],x[-5],x[-3],x[-4]); \

    printf("%%esi=%X, %%edi=%X, %%ebp=%X, %%esp=%X\n",\

           x[-8],x[-9],x[-1],x); \

    printf("stack: %X, %X, %X, %X\n", x[4], x[5], x[6], x[7]); \

    printf("       %X, %X, %X, %X\n", x[8], x[9], x[10], x[11]); \

        }

iroutine trap_register(__u8 n, iroutine f)

{

    ASSERT(n < IVT_ITEMS);

    iroutine old;

    old = ivt[n];

    ivt[n] = f;

    return old;

}

/*

 * Called directly from the assembler code.

 * CPU is cpu_priority_high().

 */

void trap_dispatcher(__u8 n, __native stack[])

{

    ASSERT(n < IVT_ITEMS);

    ivt[n](n, stack);

}

void null_interrupt(__u8 n, __native stack[])

{

    printf("int %d: null_interrupt\n", n);

    printf("stack: %L, %L, %L, %L\n", stack[0], stack[1], stack[2], stack[3]);

    panic("unserviced interrupt\n");

}

void gp_fault(__u8 n, __native stack[])

{

    PRINT_INFO_ERRCODE(stack);

    panic("general protection fault\n");

}

void ss_fault(__u8 n, __native stack[])

{

    PRINT_INFO_ERRCODE(stack);

    panic("stack fault\n");

}

void nm_fault(__u8 n, __native stack[])

{

    reset_TS_flag();

    if ((CPU->fpu_owner)!=NULL) {  

        fpu_lazy_context_save(&((CPU->fpu_owner)->saved_fpu_context));

        (CPU->fpu_owner)->fpu_context_engaged=0; /* don't prevent migration */

    }

    if(THREAD->fpu_context_exists) fpu_lazy_context_restore(&(THREAD->saved_fpu_context));

    else {fpu_init();THREAD->fpu_context_exists=1;}

    CPU->fpu_owner=THREAD;

}

void page_fault(__u8 n, __native stack[])

{

    PRINT_INFO_ERRCODE(stack);

    printf("page fault address: %X\n", read_cr2());

    panic("page fault\n");

}

void syscall(__u8 n, __native stack[])

{

    printf("cpu%d: syscall\n", CPU->id);

    thread_usleep(1000);

}

void tlb_shootdown_ipi(__u8 n, __native stack[])

{

    trap_virtual_eoi();

    tlb_shootdown_ipi_recv();

}

void wakeup_ipi(__u8 n, __native stack[])

{

    trap_virtual_eoi();

}

void trap_virtual_enable_irqs(__u16 irqmask)

{

    if (enable_irqs_function)

        enable_irqs_function(irqmask);

    else

        panic("no enable_irqs_function\n");

}

void trap_virtual_disable_irqs(__u16 irqmask)

{

    if (disable_irqs_function)

        disable_irqs_function(irqmask);

    else

        panic("no disable_irqs_function\n");

}

void trap_virtual_eoi(void)

{

    if (eoi_function)

        eoi_function();

    else

        panic("no eoi_function\n");

}