/*
* 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.
*/
/** @addtogroup amd64interrupt
* @{
*/
/** @file
*/
#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 <ddi/irq.h>
/*
* Interrupt and exception dispatching.
*/
void (* disable_irqs_function)(uint16_t irqmask) = NULL;
void (* enable_irqs_function)(uint16_t irqmask) = NULL;
void (* eoi_function)(void) = NULL;
void decode_istate(int n, istate_t *istate)
{
char *symbol;
/* uint64_t *x = &istate->stack[0]; */
if (!(symbol = get_symtab_entry(istate->rip)))
symbol = "";
printf("-----EXCEPTION(%d) OCCURED----- ( %s )\n", n
, __func__
); printf("%%rip: %#llx (%s)\n", istate
->rip
, symbol
); printf("ERROR_WORD=%#llx\n", istate
->error_word
); printf("%%cs=%#llx, rflags=%#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);
printf("%%rsp=%#llx\n", &istate
->stack
[0]); }
static void trap_virtual_eoi(void)
{
if (eoi_function)
eoi_function();
else
panic("No eoi_function.");
}
static void null_interrupt(int n, istate_t *istate)
{
fault_if_from_uspace(istate, "Unserviced interrupt: %d.", n);
decode_istate(n, istate);
panic("Unserviced interrupt.");
}
/** General Protection Fault. */
static 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.");
}
decode_istate(n, istate);
panic("General protection fault.");
}
static void ss_fault(int n, istate_t *istate)
{
fault_if_from_uspace(istate, "Stack fault.");
decode_istate(n, istate);
panic("Stack fault.");
}
static 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
}
#ifdef CONFIG_SMP
static void tlb_shootdown_ipi(int n, istate_t *istate)
{
trap_virtual_eoi();
tlb_shootdown_ipi_recv();
}
#endif
/** Handler of IRQ exceptions */
static void irq_interrupt(int n, istate_t *istate)
{
ASSERT(n >= IVT_IRQBASE);
int inum = n - IVT_IRQBASE;
bool ack = false;
ASSERT(inum < IRQ_COUNT);
ASSERT((inum != IRQ_PIC_SPUR) && (inum != IRQ_PIC1));
irq_t *irq = irq_dispatch_and_lock(inum);
if (irq) {
/*
* The IRQ handler was found.
*/
if (irq->preack) {
/* Send EOI before processing the interrupt */
trap_virtual_eoi();
ack = true;
}
irq->handler(irq, irq->arg);
spinlock_unlock(&irq->lock);
} else {
/*
* Spurious interrupt.
*/
#ifdef CONFIG_DEBUG
printf("cpu%d: spurious interrupt (inum=%d)\n", CPU
->id
, inum
); #endif
}
if (!ack)
trap_virtual_eoi();
}
void interrupt_init(void)
{
int i;
for (i = 0; i < IVT_ITEMS; i++)
exc_register(i, "null", (iroutine) null_interrupt);
for (i = 0; i < IRQ_COUNT; i++) {
if ((i != IRQ_PIC_SPUR) && (i != IRQ_PIC1))
exc_register(IVT_IRQBASE + i, "irq",
(iroutine) irq_interrupt);
}
exc_register(7, "nm_fault", (iroutine) nm_fault);
exc_register(12, "ss_fault", (iroutine) ss_fault);
exc_register(13, "gp_fault", (iroutine) gp_fault);
exc_register(14, "ident_mapper", (iroutine) ident_page_fault);
#ifdef CONFIG_SMP
exc_register(VECTOR_TLB_SHOOTDOWN_IPI, "tlb_shootdown",
(iroutine) tlb_shootdown_ipi);
#endif
}
void trap_virtual_enable_irqs(uint16_t irqmask)
{
if (enable_irqs_function)
enable_irqs_function(irqmask);
else
panic("No enable_irqs_function.");
}
void trap_virtual_disable_irqs(uint16_t irqmask)
{
if (disable_irqs_function)
disable_irqs_function(irqmask);
else
panic("No disable_irqs_function.");
}
/** @}
*/