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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. |
| */ |
| |
| /** @addtogroup ia32interrupt |
| * @{ |
| */ |
| /** @file |
| */ |
| |
| #include <arch/interrupt.h> |
| #include <syscall/syscall.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 <proc/thread.h> |
| #include <proc/task.h> |
| #include <synch/spinlock.h> |
| #include <arch/ddi/ddi.h> |
| #include <ipc/sysipc.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(istate_t *istate) |
| { |
| char *symbol = get_symtab_entry(istate->eip); |
| |
| if (!symbol) |
| symbol = ""; |
| |
| if (CPU) |
| printf("----------------EXCEPTION OCCURED (cpu%u)----------------\n", CPU->id); |
| else |
| printf("----------------EXCEPTION OCCURED----------------\n"); |
| |
| printf("%%eip: %#lx (%s)\n", istate->eip, symbol); |
| printf("ERROR_WORD=%#lx\n", istate->error_word); |
| printf("%%cs=%#lx,flags=%#lx\n", istate->cs, istate->eflags); |
| printf("%%eax=%#lx, %%ecx=%#lx, %%edx=%#lx, %%esp=%p\n", istate->eax, istate->ecx, istate->edx, &istate->stack[0]); |
| #ifdef CONFIG_DEBUG_ALLREGS |
| printf("%%esi=%#lx, %%edi=%#lx, %%ebp=%#lx, %%ebx=%#lx\n", istate->esi, istate->edi, istate->ebp, istate->ebx); |
| #endif |
| printf("stack: %#lx, %#lx, %#lx, %#lx\n", istate->stack[0], istate->stack[1], istate->stack[2], istate->stack[3]); |
| printf(" %#lx, %#lx, %#lx, %#lx\n", istate->stack[4], istate->stack[5], istate->stack[6], istate->stack[7]); |
| } |
| |
| static void trap_virtual_eoi(void) |
| { |
| if (eoi_function) |
| eoi_function(); |
| else |
| panic("no eoi_function\n"); |
| |
| } |
| |
| static void null_interrupt(int n, istate_t *istate) |
| { |
| fault_if_from_uspace(istate, "unserviced interrupt: %d", n); |
| |
| decode_istate(istate); |
| panic("unserviced interrupt: %d\n", n); |
| } |
| |
| /** General Protection Fault. */ |
| static void gp_fault(int n __attribute__((unused)), 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(istate); |
| panic("general protection fault\n"); |
| } |
| |
| static void ss_fault(int n __attribute__((unused)), istate_t *istate) |
| { |
| fault_if_from_uspace(istate, "stack fault"); |
| |
| decode_istate(istate); |
| panic("stack fault\n"); |
| } |
| |
| static void simd_fp_exception(int n __attribute__((unused)), istate_t *istate) |
| { |
| uint32_t mxcsr; |
| asm ( |
| "stmxcsr %0;\n" |
| : "=m" (mxcsr) |
| ); |
| fault_if_from_uspace(istate, "SIMD FP exception(19), MXCSR: %#zx", |
| (unative_t) mxcsr); |
| |
| decode_istate(istate); |
| printf("MXCSR: %#lx\n", mxcsr); |
| panic("SIMD FP exception(19)\n"); |
| } |
| |
| static void nm_fault(int n __attribute__((unused)), istate_t *istate __attribute__((unused))) |
| { |
| #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 __attribute__((unused)), istate_t *istate __attribute__((unused))) |
| { |
| trap_virtual_eoi(); |
| tlb_shootdown_ipi_recv(); |
| } |
| #endif |
| |
| /** Handler of IRQ exceptions */ |
| static void irq_interrupt(int n, istate_t *istate __attribute__((unused))) |
| { |
| 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%u: 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(19, "simd_fp", (iroutine) simd_fp_exception); |
| |
| #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\n"); |
| } |
| |
| void trap_virtual_disable_irqs(uint16_t irqmask) |
| { |
| if (disable_irqs_function) |
| disable_irqs_function(irqmask); |
| else |
| panic("no disable_irqs_function\n"); |
| } |
| |
| /** @} |
| */ |