/*
* 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[])
{
reset_TS_flag();
if ((CPU->fpu_owner)!=NULL)
{
fpu_lazy_context_save(&((CPU->fpu_owner)->saved_fpu_context));
(CPU->fpu_owner)->fpu_context_engaged=0; /* don't prevent migration */
}
if(THREAD->fpu_context_exists) fpu_lazy_context_restore(&(THREAD->saved_fpu_context));
else {fpu_init();THREAD->fpu_context_exists=1;}
CPU->fpu_owner=THREAD;
}
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]); 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");
}