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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/drivers/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>

#include <proc/task.h>

#include <synch/spinlock.h>

#include <arch/ddi/ddi.h>

#include <interrupt.h>

#include <ipc/irq.h>

void print_info_errcode(int n, istate_t *istate)

{

    char *symbol;

/*  __u64 *x = &istate->stack[0]; */

    if (!(symbol=get_symtab_entry(istate->rip)))

        symbol = "";

    printf("-----EXCEPTION(%d) OCCURED----- ( %s )\n",n, __FUNCTION__);

    printf("%%rip: %#llX (%s)\n",istate->rip, symbol);

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

    printf("%%rcs=%#llX, flags=%#llX, %%cr0=%#llX\n", istate->cs, istate->rflags,read_cr0());

    printf("%%rax=%#llX, %%rcx=%#llX, %%rdx=%#llX\n",istate->rax,istate->rcx,istate->rdx);

    printf("%%rsi=%#llX, %%rdi=%#llX, %%r8 =%#llX\n",istate->rsi,istate->rdi,istate->r8);

    printf("%%r9 =%#llX, %%r10 =%#llX, %%r11=%#llX\n",istate->r9,istate->r10,istate->r11);

#ifdef CONFIG_DEBUG_ALLREGS 

    printf("%%r12=%#llX, %%r13=%#llX, %%r14=%#llX\n",istate->r12,istate->r13,istate->r14);

    printf("%%r15=%#llX, %%rbx=%#llX, %%rbp=%#llX\n",istate->r15,istate->rbx,&istate->rbp);

#endif

    printf("%%rsp=%#llX\n",&istate->stack[0]);

}

/*

 * 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, istate_t *istate)

{

    fault_if_from_uspace(istate, "unserviced interrupt: %d", n);

    print_info_errcode(n, istate);

    panic("unserviced interrupt\n");

}

/** General Protection Fault. */

void gp_fault(int n, istate_t *istate)

{

    if (TASK) {

        count_t ver;

        spinlock_lock(&TASK->lock);

        ver = TASK->arch.iomapver;

        spinlock_unlock(&TASK->lock);

        if (CPU->arch.iomapver_copy != ver) {

            /*

             * This fault can be caused by an early access

             * to I/O port because of an out-dated

             * I/O Permission bitmap installed on CPU.

             * Install the fresh copy and restart

             * the instruction.

             */

            io_perm_bitmap_install();

            return;

        }

        fault_if_from_uspace(istate, "general protection fault");

    }

    print_info_errcode(n, istate);

    panic("general protection fault\n");

}

void ss_fault(int n, istate_t *istate)

{

    fault_if_from_uspace(istate, "stack fault");

    print_info_errcode(n, istate);

    panic("stack fault\n");

}

void nm_fault(int n, istate_t *istate)

{

#ifdef CONFIG_FPU_LAZY     

    scheduler_fpu_lazy_request();

#else

    fault_if_from_uspace(istate, "fpu fault");

    panic("fpu fault");

#endif

}

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");

}

static void ipc_int(int n, istate_t *istate)

{

    trap_virtual_eoi();

    ipc_irq_send_notif(n-IVT_IRQBASE);

}

/* Reregister irq to be IPC-ready */

void irq_ipc_bind_arch(__native irq)

{

    if (irq == IRQ_CLK)

        return;

    exc_register(IVT_IRQBASE+irq, "ipc_int", ipc_int);

}