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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 <mm/as.h>
#include <arch.h>
#include <symtab.h>
#include <arch/asm.h>
#include <proc/scheduler.h>
#include <proc/thread.h>

/*
static void messy_stack_trace(__native *stack)
{
    __native *upper_limit = (__native *)(((__native)get_stack_base()) + STACK_SIZE);
    char *symbol;

    printf("Stack contents: ");
    while (stack < upper_limit) {
        symbol = get_symtab_entry((__address)*stack);
        if (symbol)
            printf("%s, ", symbol);
        stack++;
    }
    printf("\n");
}
*/

static void print_info_errcode(int n, struct interrupt_context *ctx)
{
    char *symbol;
    __u64 *x = &ctx->stack[0];

    if (!(symbol=get_symtab_entry(x[1])))
        symbol = "";

    printf("-----EXCEPTION(%d) OCCURED----- ( %s )\n",n,__FUNCTION__);
    printf("%%rip: %Q (%s)\n",ctx->stack[1],symbol);
    printf("ERROR_WORD=%Q\n", ctx->stack[0]);
    printf("%%rcs=%Q,flags=%Q, %%cr0=%Q\n", ctx->stack[2], 
           ctx->stack[3],read_cr0());
    printf("%%rax=%Q, %%rbx=%Q, %%rcx=%Q\n",ctx->rax,ctx->rbx,ctx->rcx);
    printf("%%rdx=%Q, %%rsi=%Q, %%rdi=%Q\n",ctx->rdx,ctx->rsi,ctx->rdi);
    printf("%%r8 =%Q, %%r9 =%Q, %%r10=%Q\n",ctx->r8,ctx->r9,ctx->r10);
    printf("%%r11=%Q, %%r12=%Q, %%r13=%Q\n",ctx->r11,ctx->r12,ctx->r13);
    printf("%%r14=%Q, %%r15=%Q, %%rsp=%Q\n",ctx->r14,ctx->r15,&ctx->stack[0]);
    printf("%%rbp=%Q\n",ctx->rbp);
    printf("stack: %Q, %Q, %Q\n", x[5], x[6], x[7]);
    printf("       %Q, %Q, %Q\n", x[8], x[9], x[10]);
    printf("       %Q, %Q, %Q\n", x[11], x[12], x[13]);
    printf("       %Q, %Q, %Q\n", x[14], x[15], x[16]);
//  messy_stack_trace(&x[5]);
}

/*
 * Interrupt and exception dispatching.
 */

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

void null_interrupt(int n, struct interrupt_context *ctx)
{
    printf("-----EXCEPTION(%d) OCCURED----- ( %s )\n",n,__FUNCTION__); \
    printf("stack: %X, %X, %X, %X\n", ctx->stack[0], ctx->stack[1],
           ctx->stack[2], ctx->stack[3]);
    panic("unserviced interrupt\n");
}

void gp_fault(int n, void *stack)
{
    print_info_errcode(n,stack);
    panic("general protection fault\n");
}

void ss_fault(int n, void *stack)
{
    print_info_errcode(n,stack);
    panic("stack fault\n");
}


void nm_fault(int n, void *stack)
{
#ifdef CONFIG_FPU_LAZY     
    scheduler_fpu_lazy_request();
#else
    panic("fpu fault");
#endif
}

void page_fault(int n, struct interrupt_context *ctx)
{
    __address page;
    
    page = read_cr2();
    if (!as_page_fault(page)) {
        print_info_errcode(n,ctx);
        printf("Page fault address: %Q\n", page);
        panic("page fault\n");
    }
}

void tlb_shootdown_ipi(int n, void *stack)
{
    trap_virtual_eoi();
    tlb_shootdown_ipi_recv();
}

void wakeup_ipi(int n, void *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");

}