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* Copyright (c) 2001-2004 Jakub Jermar
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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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* - 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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* 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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/** @addtogroup amd64interrupt
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#include <arch/interrupt.h>
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#include <arch/drivers/i8259.h>
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#include <proc/scheduler.h>
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#include <proc/thread.h>
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#include <proc/task.h>
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#include <synch/spinlock.h>
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#include <arch/ddi/ddi.h>
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#include <interrupt.h>
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* Interrupt and exception dispatching.
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void (* disable_irqs_function)(uint16_t irqmask) = NULL;
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void (* enable_irqs_function)(uint16_t irqmask) = NULL;
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void (* eoi_function)(void) = NULL;
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void decode_istate(int n, istate_t *istate)
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symbol = symtab_fmt_name_lookup(istate->rip);
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printf("-----EXCEPTION(%d) OCCURED----- ( %s )\n", n, __func__);
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printf("%%rip: %#llx (%s)\n", istate->rip, symbol);
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printf("ERROR_WORD=%#llx\n", istate->error_word);
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printf("%%cs=%#llx, rflags=%#llx, %%cr0=%#llx\n", istate->cs,
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istate->rflags, read_cr0());
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printf("%%rax=%#llx, %%rcx=%#llx, %%rdx=%#llx\n", istate->rax,
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istate->rcx, istate->rdx);
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printf("%%rsi=%#llx, %%rdi=%#llx, %%r8=%#llx\n", istate->rsi,
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istate->rdi, istate->r8);
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printf("%%r9=%#llx, %%r10=%#llx, %%r11=%#llx\n", istate->r9,
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istate->r10, istate->r11);
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printf("%%rsp=%#llx\n", &istate->stack[0]);
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static void trap_virtual_eoi(void)
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panic("No eoi_function.");
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static void null_interrupt(int n, istate_t *istate)
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fault_if_from_uspace(istate, "Unserviced interrupt: %d.", n);
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decode_istate(n, istate);
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panic("Unserviced interrupt.");
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/** General Protection Fault. */
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static void gp_fault(int n, istate_t *istate)
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spinlock_lock(&TASK->lock);
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ver = TASK->arch.iomapver;
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spinlock_unlock(&TASK->lock);
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if (CPU->arch.iomapver_copy != ver) {
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* This fault can be caused by an early access
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* to I/O port because of an out-dated
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* I/O Permission bitmap installed on CPU.
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* Install the fresh copy and restart
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io_perm_bitmap_install();
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fault_if_from_uspace(istate, "General protection fault.");
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decode_istate(n, istate);
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panic("General protection fault.");
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static void ss_fault(int n, istate_t *istate)
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fault_if_from_uspace(istate, "Stack fault.");
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decode_istate(n, istate);
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panic("Stack fault.");
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static void nm_fault(int n, istate_t *istate)
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#ifdef CONFIG_FPU_LAZY
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scheduler_fpu_lazy_request();
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fault_if_from_uspace(istate, "FPU fault.");
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static void tlb_shootdown_ipi(int n, istate_t *istate)
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tlb_shootdown_ipi_recv();
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/** Handler of IRQ exceptions */
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static void irq_interrupt(int n, istate_t *istate)
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ASSERT(n >= IVT_IRQBASE);
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int inum = n - IVT_IRQBASE;
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ASSERT(inum < IRQ_COUNT);
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ASSERT((inum != IRQ_PIC_SPUR) && (inum != IRQ_PIC1));
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irq_t *irq = irq_dispatch_and_lock(inum);
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* The IRQ handler was found.
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/* Send EOI before processing the interrupt */
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spinlock_unlock(&irq->lock);
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* Spurious interrupt.
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printf("cpu%d: spurious interrupt (inum=%d)\n", CPU->id, inum);
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void interrupt_init(void)
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for (i = 0; i < IVT_ITEMS; i++)
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exc_register(i, "null", (iroutine) null_interrupt);
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for (i = 0; i < IRQ_COUNT; i++) {
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if ((i != IRQ_PIC_SPUR) && (i != IRQ_PIC1))
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exc_register(IVT_IRQBASE + i, "irq",
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(iroutine) irq_interrupt);
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exc_register(7, "nm_fault", (iroutine) nm_fault);
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exc_register(12, "ss_fault", (iroutine) ss_fault);
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exc_register(13, "gp_fault", (iroutine) gp_fault);
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exc_register(14, "ident_mapper", (iroutine) ident_page_fault);
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exc_register(VECTOR_TLB_SHOOTDOWN_IPI, "tlb_shootdown",
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(iroutine) tlb_shootdown_ipi);
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void trap_virtual_enable_irqs(uint16_t irqmask)
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if (enable_irqs_function)
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enable_irqs_function(irqmask);
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panic("No enable_irqs_function.");
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void trap_virtual_disable_irqs(uint16_t irqmask)
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if (disable_irqs_function)
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disable_irqs_function(irqmask);
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panic("No disable_irqs_function.");