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  1. /*
  2.  * Copyright (c) 2001-2004 Jakub Jermar
  3.  * All rights reserved.
  4.  *
  5.  * Redistribution and use in source and binary forms, with or without
  6.  * modification, are permitted provided that the following conditions
  7.  * are met:
  8.  *
  9.  * - Redistributions of source code must retain the above copyright
  10.  *   notice, this list of conditions and the following disclaimer.
  11.  * - Redistributions in binary form must reproduce the above copyright
  12.  *   notice, this list of conditions and the following disclaimer in the
  13.  *   documentation and/or other materials provided with the distribution.
  14.  * - The name of the author may not be used to endorse or promote products
  15.  *   derived from this software without specific prior written permission.
  16.  *
  17.  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  18.  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  19.  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  20.  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  21.  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  22.  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  23.  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  24.  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  25.  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  26.  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  27.  */
  28.  
  29. /** @addtogroup amd64interrupt
  30.  * @{
  31.  */
  32. /** @file
  33.  */
  34.  
  35. #include <arch/interrupt.h>
  36. #include <print.h>
  37. #include <debug.h>
  38. #include <panic.h>
  39. #include <arch/drivers/i8259.h>
  40. #include <func.h>
  41. #include <cpu.h>
  42. #include <arch/asm.h>
  43. #include <mm/tlb.h>
  44. #include <mm/as.h>
  45. #include <arch.h>
  46. #include <symtab.h>
  47. #include <arch/asm.h>
  48. #include <proc/scheduler.h>
  49. #include <proc/thread.h>
  50. #include <proc/task.h>
  51. #include <synch/spinlock.h>
  52. #include <arch/ddi/ddi.h>
  53. #include <interrupt.h>
  54. #include <ddi/irq.h>
  55.  
  56. /*
  57.  * Interrupt and exception dispatching.
  58.  */
  59.  
  60. void (* disable_irqs_function)(uint16_t irqmask) = NULL;
  61. void (* enable_irqs_function)(uint16_t irqmask) = NULL;
  62. void (* eoi_function)(void) = NULL;
  63.  
  64. void decode_istate(int n, istate_t *istate)
  65. {
  66.     char *symbol;
  67. /*  uint64_t *x = &istate->stack[0]; */
  68.  
  69.     if (!(symbol = get_symtab_entry(istate->rip)))
  70.         symbol = "";
  71.  
  72.     printf("-----EXCEPTION(%d) OCCURED----- ( %s )\n", n, __func__);
  73.     printf("%%rip: %#llx (%s)\n", istate->rip, symbol);
  74.     printf("ERROR_WORD=%#llx\n", istate->error_word);
  75.     printf("%%cs=%#llx, rflags=%#llx, %%cr0=%#llx\n", istate->cs,
  76.         istate->rflags, read_cr0());
  77.     printf("%%rax=%#llx, %%rcx=%#llx, %%rdx=%#llx\n", istate->rax,
  78.         istate->rcx, istate->rdx);
  79.     printf("%%rsi=%#llx, %%rdi=%#llx, %%r8=%#llx\n", istate->rsi,
  80.         istate->rdi, istate->r8);
  81.     printf("%%r9=%#llx, %%r10=%#llx, %%r11=%#llx\n", istate->r9,
  82.         istate->r10, istate->r11);
  83. #ifdef CONFIG_DEBUG_ALLREGS
  84.     printf("%%r12=%#llx, %%r13=%#llx, %%r14=%#llx\n", istate->r12,
  85.         istate->r13, istate->r14);
  86.     printf("%%r15=%#llx, %%rbx=%#llx, %%rbp=%#llx\n", istate->r15,
  87.         istate->rbx, &istate->rbp);
  88. #endif
  89.     printf("%%rsp=%#llx\n", &istate->stack[0]);
  90. }
  91.  
  92. static void trap_virtual_eoi(void)
  93. {
  94.     if (eoi_function)
  95.         eoi_function();
  96.     else
  97.         panic("no eoi_function\n");
  98.  
  99. }
  100.  
  101. static void null_interrupt(int n, istate_t *istate)
  102. {
  103.     fault_if_from_uspace(istate, "unserviced interrupt: %d", n);
  104.     decode_istate(n, istate);
  105.     panic("unserviced interrupt\n");
  106. }
  107.  
  108. /** General Protection Fault. */
  109. static void gp_fault(int n, istate_t *istate)
  110. {
  111.     if (TASK) {
  112.         count_t ver;
  113.  
  114.         spinlock_lock(&TASK->lock);
  115.         ver = TASK->arch.iomapver;
  116.         spinlock_unlock(&TASK->lock);
  117.  
  118.         if (CPU->arch.iomapver_copy != ver) {
  119.             /*
  120.              * This fault can be caused by an early access
  121.              * to I/O port because of an out-dated
  122.              * I/O Permission bitmap installed on CPU.
  123.              * Install the fresh copy and restart
  124.              * the instruction.
  125.              */
  126.             io_perm_bitmap_install();
  127.             return;
  128.         }
  129.         fault_if_from_uspace(istate, "general protection fault");
  130.     }
  131.  
  132.     decode_istate(n, istate);
  133.     panic("general protection fault\n");
  134. }
  135.  
  136. static void ss_fault(int n, istate_t *istate)
  137. {
  138.     fault_if_from_uspace(istate, "stack fault");
  139.     decode_istate(n, istate);
  140.     panic("stack fault\n");
  141. }
  142.  
  143. static void nm_fault(int n, istate_t *istate)
  144. {
  145. #ifdef CONFIG_FPU_LAZY    
  146.     scheduler_fpu_lazy_request();
  147. #else
  148.     fault_if_from_uspace(istate, "fpu fault");
  149.     panic("fpu fault");
  150. #endif
  151. }
  152.  
  153. static void tlb_shootdown_ipi(int n, istate_t *istate)
  154. {
  155.     trap_virtual_eoi();
  156.     tlb_shootdown_ipi_recv();
  157. }
  158.  
  159. /** Handler of IRQ exceptions */
  160. static void irq_interrupt(int n, istate_t *istate)
  161. {
  162.     ASSERT(n >= IVT_IRQBASE);
  163.    
  164.     int inum = n - IVT_IRQBASE;
  165.     bool ack = false;
  166.     ASSERT(inum < IRQ_COUNT);
  167.     ASSERT((inum != IRQ_PIC_SPUR) && (inum != IRQ_PIC1));
  168.    
  169.     irq_t *irq = irq_dispatch_and_lock(inum);
  170.     if (irq) {
  171.         /*
  172.          * The IRQ handler was found.
  173.          */
  174.          
  175.         if (irq->preack) {
  176.             /* Send EOI before processing the interrupt */
  177.             trap_virtual_eoi();
  178.             ack = true;
  179.         }
  180.         irq->handler(irq, irq->arg);
  181.         spinlock_unlock(&irq->lock);
  182.     } else {
  183.         /*
  184.          * Spurious interrupt.
  185.          */
  186. #ifdef CONFIG_DEBUG
  187.         printf("cpu%d: spurious interrupt (inum=%d)\n", CPU->id, inum);
  188. #endif
  189.     }
  190.    
  191.     if (!ack)
  192.         trap_virtual_eoi();
  193. }
  194.  
  195. void interrupt_init(void)
  196. {
  197.     int i;
  198.    
  199.     for (i = 0; i < IVT_ITEMS; i++)
  200.         exc_register(i, "null", (iroutine) null_interrupt);
  201.    
  202.     for (i = 0; i < IRQ_COUNT; i++) {
  203.         if ((i != IRQ_PIC_SPUR) && (i != IRQ_PIC1))
  204.             exc_register(IVT_IRQBASE + i, "irq",
  205.                 (iroutine) irq_interrupt);
  206.     }
  207.    
  208.     exc_register(7, "nm_fault", (iroutine) nm_fault);
  209.     exc_register(12, "ss_fault", (iroutine) ss_fault);
  210.     exc_register(13, "gp_fault", (iroutine) gp_fault);
  211.     exc_register(14, "ident_mapper", (iroutine) ident_page_fault);
  212.    
  213. #ifdef CONFIG_SMP
  214.     exc_register(VECTOR_TLB_SHOOTDOWN_IPI, "tlb_shootdown",
  215.         (iroutine) tlb_shootdown_ipi);
  216. #endif
  217. }
  218.  
  219. void trap_virtual_enable_irqs(uint16_t irqmask)
  220. {
  221.     if (enable_irqs_function)
  222.         enable_irqs_function(irqmask);
  223.     else
  224.         panic("no enable_irqs_function\n");
  225. }
  226.  
  227. void trap_virtual_disable_irqs(uint16_t irqmask)
  228. {
  229.     if (disable_irqs_function)
  230.         disable_irqs_function(irqmask);
  231.     else
  232.         panic("no disable_irqs_function\n");
  233. }
  234.  
  235. /** @}
  236.  */
  237.