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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 <syscall/syscall.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 <mm/as.h>

#include <arch.h>

#include <symtab.h>

#include <proc/thread.h>

/*

 * Interrupt and exception dispatching.

 */

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

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

void (* eoi_function)(void) = NULL;

static void PRINT_INFO_ERRCODE(istate_t *istate)

{

    char *symbol = get_symtab_entry(istate->eip);

    if (!symbol)

        symbol = "";

    if (CPU)

        printf("----------------EXCEPTION OCCURED (cpu%d)----------------\n", CPU->id);

    else

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

    printf("%%eip: %X (%s)\n",istate->eip,symbol);

    printf("ERROR_WORD=%X\n", istate->error_word);

    printf("%%cs=%X,flags=%X\n", istate->cs, istate->eflags);

    printf("%%eax=%X, %%ebx=%X, %%ecx=%X, %%edx=%X\n",  istate->eax,istate->ebx,istate->ecx,istate->edx);

    printf("%%esi=%X, %%edi=%X, %%ebp=%X, %%esp=%X\n",  istate->esi,istate->edi,istate->ebp,istate->esp);

    printf("stack: %X, %X, %X, %X\n", istate->stack[0], istate->stack[1], istate->stack[2], istate->stack[3]);

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

}

void null_interrupt(int n, istate_t *istate)

{

    PRINT_INFO_ERRCODE(istate);

    panic("unserviced interrupt: %d\n", n);

}

void gp_fault(int n, istate_t *istate)

{

    PRINT_INFO_ERRCODE(istate);

    panic("general protection fault\n");

}

void ss_fault(int n, istate_t *istate)

{

    PRINT_INFO_ERRCODE(istate);

    panic("stack fault\n");

}

void simd_fp_exception(int n, istate_t *istate)

{

    PRINT_INFO_ERRCODE(istate);

    __u32 mxcsr;

    asm

    (

        "stmxcsr %0;\n"

        :"=m"(mxcsr)

    );

    printf("MXCSR: %X\n",(__native)(mxcsr));

    panic("SIMD FP exception(19)\n");

}

void nm_fault(int n, istate_t *istate)

{

#ifdef CONFIG_FPU_LAZY     

    scheduler_fpu_lazy_request();

#else

    panic("fpu fault");

#endif

}

void page_fault(int n, istate_t *istate)

{

    __address page;

    page = read_cr2();

    if (!as_page_fault(page)) {

        PRINT_INFO_ERRCODE(istate);

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

        panic("page fault\n");

    }

}

void syscall(int n, istate_t *istate)

{

    interrupts_enable();

    if (istate->esi < SYSCALL_END)

        istate->eax = syscall_table[istate->esi](istate->eax, istate->ebx, istate->ecx, istate->edx);

    else

        panic("Undefined syscall %d", istate->esi);

    interrupts_disable();

}

void tlb_shootdown_ipi(int n, istate_t *istate)

{

    trap_virtual_eoi();

    tlb_shootdown_ipi_recv();

}

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");

}