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1 jermar 1
/*
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 * Copyright (C) 2001-2004 Jakub Jermar
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 * All rights reserved.
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 *
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 * Redistribution and use in source and binary forms, with or without
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 * modification, are permitted provided that the following conditions
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 * are met:
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 *
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 * - Redistributions of source code must retain the above copyright
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 *   notice, this list of conditions and the following disclaimer.
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 * - Redistributions in binary form must reproduce the above copyright
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 *   notice, this list of conditions and the following disclaimer in the
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 *   documentation and/or other materials provided with the distribution.
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 * - The name of the author may not be used to endorse or promote products
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 *   derived from this software without specific prior written permission.
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 *
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 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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 */
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#include <arch/interrupt.h>
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#include <syscall/syscall.h>
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#include <print.h>
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#include <debug.h>
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#include <panic.h>
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#include <arch/i8259.h>
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#include <func.h>
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#include <cpu.h>
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#include <arch/asm.h>
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#include <mm/tlb.h>
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#include <mm/as.h>
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#include <arch.h>
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#include <symtab.h>
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#include <proc/thread.h>
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/*
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 * Interrupt and exception dispatching.
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 */
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void (* disable_irqs_function)(__u16 irqmask) = NULL;
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void (* enable_irqs_function)(__u16 irqmask) = NULL;
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void (* eoi_function)(void) = NULL;
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#define PRINT_INFO_ERRCODE(istate) do { \
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    char *symbol = get_symtab_entry(istate->eip); \
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    if (!symbol) \
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        symbol = ""; \
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    printf("----------------EXCEPTION OCCURED----------------\n"); \
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    printf("%%eip: %X (%s)\n",istate->eip,symbol); \
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    printf("ERROR_WORD=%X\n", istate->error_word); \
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    printf("%%cs=%X,flags=%X\n", istate->cs, istate->eflags); \
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    printf("%%eax=%X, %%ebx=%X, %%ecx=%X, %%edx=%X\n",\
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           istate->eax,istate->ebx,istate->ecx,istate->edx); \
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    printf("%%esi=%X, %%edi=%X, %%ebp=%X, %%esp=%X\n",\
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           istate->esi,istate->edi,istate->ebp,istate->esp); \
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    printf("stack: %X, %X, %X, %X\n", istate->stack[0], istate->stack[1], istate->stack[2], istate->stack[3]); \
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    printf("       %X, %X, %X, %X\n", istate->stack[4], istate->stack[5], istate->stack[6], istate->stack[7]); \
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} while(0)
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void null_interrupt(int n, istate_t *istate)
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{
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    PRINT_INFO_ERRCODE(istate);
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    panic("unserviced interrupt: %d\n", n);
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}
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void gp_fault(int n, istate_t *istate)
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{
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    PRINT_INFO_ERRCODE(istate);
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    panic("general protection fault\n");
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}
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void ss_fault(int n, istate_t *istate)
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{
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    PRINT_INFO_ERRCODE(istate);
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    panic("stack fault\n");
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}
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void nm_fault(int n, istate_t *istate)
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{
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#ifdef CONFIG_FPU_LAZY     
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    scheduler_fpu_lazy_request();
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#else
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    panic("fpu fault");
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#endif
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}
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void page_fault(int n, istate_t *istate)
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{
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    __address page;
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    page = read_cr2();
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    if (!as_page_fault(page)) {
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        PRINT_INFO_ERRCODE(istate);
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        printf("page fault address: %X\n", page);
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        panic("page fault\n");
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    }
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}
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void syscall(int n, istate_t *istate)
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{
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    interrupts_enable();
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    if (istate->edx < SYSCALL_END)
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        istate->eax = syscall_table[istate->edx](istate->eax, istate->ebx, istate->ecx);
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    else
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        panic("Undefined syscall %d", istate->edx);
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    interrupts_disable();
1 jermar 115
}
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void tlb_shootdown_ipi(int n, istate_t *istate)
5 jermar 118
{
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    trap_virtual_eoi();
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    tlb_shootdown_ipi_recv();
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}
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1 jermar 123
void trap_virtual_enable_irqs(__u16 irqmask)
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{
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    if (enable_irqs_function)
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        enable_irqs_function(irqmask);
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    else
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        panic("no enable_irqs_function\n");
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}
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void trap_virtual_disable_irqs(__u16 irqmask)
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{
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    if (disable_irqs_function)
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        disable_irqs_function(irqmask);
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    else
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        panic("no disable_irqs_function\n");
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}
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void trap_virtual_eoi(void)
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{
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    if (eoi_function)
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        eoi_function();
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    else
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        panic("no eoi_function\n");
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}