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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>

/*

 * 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;

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, __u32 stack[])

{

    ASSERT(n < IVT_ITEMS);

    ivt[n](n, stack);

}

void null_interrupt(__u8 n, __u32 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, __u32 stack[])

{

    printf("stack[0]=%X, %%eip=%X, %%cs=%X, flags=%X\n", stack[0], stack[1], stack[2], stack[3]);

    printf("%%eax=%L, %%ebx=%L, %%ecx=%L, %%edx=%L,\n%%edi=%L, %%esi=%L, %%ebp=%L, %%esp=%L\n", stack[-2], stack[-5], stack[-3], stack[-4], stack[-9], stack[-8], stack[-1], stack);

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

    panic("general protection fault\n");

}

void ss_fault(__u8 n, __u32 stack[])

{

    printf("stack[0]=%X, %%eip=%X, %%cs=%X, flags=%X\n", stack[0], stack[1], stack[2], stack[3]);

    printf("%%eax=%L, %%ebx=%L, %%ecx=%L, %%edx=%L,\n%%edi=%L, %%esi=%L, %%ebp=%L, %%esp=%L\n", stack[-2], stack[-5], stack[-3], stack[-4], stack[-9], stack[-8], stack[-1], stack);

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

    panic("Stack fault\n");

}

void nm_fault(__u8 n, __u32 stack[])

{

//  printf("-1\n");        

    reset_TS_flag();

        if ((CPU->fpu_owner)!=NULL)

    {  

//          printf("owner %X\n",(int)(&((CPU->fpu_owner)->saved_fpu_context)));        

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

//          printf("owner 2\n");

        (CPU->fpu_owner)->fpu_context_engaged=0; /* Enables migration */

//          printf("owner 3\n");        

    }

//  printf("0\n");

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

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

//  printf("1\n");

    CPU->fpu_owner=THREAD;

//  printf("2\n");

//  printf("3\n");  

//  panic("#NM fault\n");

}

void page_fault(__u8 n, __u32 stack[])

{

    printf("page fault address: %X\n", cpu_read_cr2());

    printf("stack[0]=%X, %%eip=%X, %%cs=%X, flags=%X\n", stack[0], stack[1], stack[2], stack[3]);

    printf("%%eax=%L, %%ebx=%L, %%ecx=%L, %%edx=%L,\n%%edi=%L, %%esi=%L, %%ebp=%L, %%esp=%L\n", stack[-2], stack[-5], stack[-3], stack[-4], stack[-9], stack[-8], stack[-1], stack);

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

    printf("page fault\n");

    cpu_halt();

}

void syscall(__u8 n, __u32 stack[])

{

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

    thread_usleep(1000);

}

void tlb_shootdown_ipi(__u8 n, __u32 stack[])

{

    trap_virtual_eoi();

    tlb_shootdown_ipi_recv();

}

void wakeup_ipi(__u8 n, __u32 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");

}