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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 <arch/asm.h>
  47. #include <proc/scheduler.h>
  48. #include <proc/thread.h>
  49. #include <proc/task.h>
  50. #include <synch/spinlock.h>
  51. #include <arch/ddi/ddi.h>
  52. #include <interrupt.h>
  53. #include <ddi/irq.h>
  54.  
  55. #ifdef CONFIG_SYMTAB
  56. #include <symtab.h>
  57. #endif
  58.  
  59. /*
  60.  * Interrupt and exception dispatching.
  61.  */
  62.  
  63. void (* disable_irqs_function)(uint16_t irqmask) = NULL;
  64. void (* enable_irqs_function)(uint16_t irqmask) = NULL;
  65. void (* eoi_function)(void) = NULL;
  66.  
  67. void decode_istate(int n, istate_t *istate)
  68. {
  69.     char *symbol;
  70. /*  uint64_t *x = &istate->stack[0]; */
  71.  
  72. #ifdef CONFIG_SYMTAB
  73.     if (!(symbol = get_symtab_entry(istate->rip)))
  74.         symbol = "";
  75. #else
  76.     symbol = "";
  77. #endif
  78.  
  79.     printf("-----EXCEPTION(%d) OCCURED----- ( %s )\n", n, __func__);
  80.     printf("%%rip: %#llx (%s)\n", istate->rip, symbol);
  81.     printf("ERROR_WORD=%#llx\n", istate->error_word);
  82.     printf("%%cs=%#llx, rflags=%#llx, %%cr0=%#llx\n", istate->cs,
  83.         istate->rflags, read_cr0());
  84.     printf("%%rax=%#llx, %%rcx=%#llx, %%rdx=%#llx\n", istate->rax,
  85.         istate->rcx, istate->rdx);
  86.     printf("%%rsi=%#llx, %%rdi=%#llx, %%r8=%#llx\n", istate->rsi,
  87.         istate->rdi, istate->r8);
  88.     printf("%%r9=%#llx, %%r10=%#llx, %%r11=%#llx\n", istate->r9,
  89.         istate->r10, istate->r11);
  90.     printf("%%rsp=%#llx\n", &istate->stack[0]);
  91. }
  92.  
  93. static void trap_virtual_eoi(void)
  94. {
  95.     if (eoi_function)
  96.         eoi_function();
  97.     else
  98.         panic("No eoi_function.");
  99.  
  100. }
  101.  
  102. static void null_interrupt(int n, istate_t *istate)
  103. {
  104.     fault_if_from_uspace(istate, "Unserviced interrupt: %d.", n);
  105.     decode_istate(n, istate);
  106.     panic("Unserviced interrupt.");
  107. }
  108.  
  109. /** General Protection Fault. */
  110. static void gp_fault(int n, istate_t *istate)
  111. {
  112.     if (TASK) {
  113.         count_t ver;
  114.  
  115.         spinlock_lock(&TASK->lock);
  116.         ver = TASK->arch.iomapver;
  117.         spinlock_unlock(&TASK->lock);
  118.  
  119.         if (CPU->arch.iomapver_copy != ver) {
  120.             /*
  121.              * This fault can be caused by an early access
  122.              * to I/O port because of an out-dated
  123.              * I/O Permission bitmap installed on CPU.
  124.              * Install the fresh copy and restart
  125.              * the instruction.
  126.              */
  127.             io_perm_bitmap_install();
  128.             return;
  129.         }
  130.         fault_if_from_uspace(istate, "General protection fault.");
  131.     }
  132.  
  133.     decode_istate(n, istate);
  134.     panic("General protection fault.");
  135. }
  136.  
  137. static void ss_fault(int n, istate_t *istate)
  138. {
  139.     fault_if_from_uspace(istate, "Stack fault.");
  140.     decode_istate(n, istate);
  141.     panic("Stack fault.");
  142. }
  143.  
  144. static void nm_fault(int n, istate_t *istate)
  145. {
  146. #ifdef CONFIG_FPU_LAZY
  147.     scheduler_fpu_lazy_request();
  148. #else
  149.     fault_if_from_uspace(istate, "FPU fault.");
  150.     panic("FPU fault.");
  151. #endif
  152. }
  153.  
  154. #ifdef CONFIG_SMP
  155. static void tlb_shootdown_ipi(int n, istate_t *istate)
  156. {
  157.     trap_virtual_eoi();
  158.     tlb_shootdown_ipi_recv();
  159. }
  160. #endif
  161.  
  162. /** Handler of IRQ exceptions */
  163. static void irq_interrupt(int n, istate_t *istate)
  164. {
  165.     ASSERT(n >= IVT_IRQBASE);
  166.    
  167.     int inum = n - IVT_IRQBASE;
  168.     bool ack = false;
  169.     ASSERT(inum < IRQ_COUNT);
  170.     ASSERT((inum != IRQ_PIC_SPUR) && (inum != IRQ_PIC1));
  171.    
  172.     irq_t *irq = irq_dispatch_and_lock(inum);
  173.     if (irq) {
  174.         /*
  175.          * The IRQ handler was found.
  176.          */
  177.          
  178.         if (irq->preack) {
  179.             /* Send EOI before processing the interrupt */
  180.             trap_virtual_eoi();
  181.             ack = true;
  182.         }
  183.         irq->handler(irq);
  184.         spinlock_unlock(&irq->lock);
  185.     } else {
  186.         /*
  187.          * Spurious interrupt.
  188.          */
  189. #ifdef CONFIG_DEBUG
  190.         printf("cpu%d: spurious interrupt (inum=%d)\n", CPU->id, inum);
  191. #endif
  192.     }
  193.    
  194.     if (!ack)
  195.         trap_virtual_eoi();
  196. }
  197.  
  198. void interrupt_init(void)
  199. {
  200.     int i;
  201.    
  202.     for (i = 0; i < IVT_ITEMS; i++)
  203.         exc_register(i, "null", (iroutine) null_interrupt);
  204.    
  205.     for (i = 0; i < IRQ_COUNT; i++) {
  206.         if ((i != IRQ_PIC_SPUR) && (i != IRQ_PIC1))
  207.             exc_register(IVT_IRQBASE + i, "irq",
  208.                 (iroutine) irq_interrupt);
  209.     }
  210.    
  211.     exc_register(7, "nm_fault", (iroutine) nm_fault);
  212.     exc_register(12, "ss_fault", (iroutine) ss_fault);
  213.     exc_register(13, "gp_fault", (iroutine) gp_fault);
  214.     exc_register(14, "ident_mapper", (iroutine) ident_page_fault);
  215.    
  216. #ifdef CONFIG_SMP
  217.     exc_register(VECTOR_TLB_SHOOTDOWN_IPI, "tlb_shootdown",
  218.         (iroutine) tlb_shootdown_ipi);
  219. #endif
  220. }
  221.  
  222. void trap_virtual_enable_irqs(uint16_t irqmask)
  223. {
  224.     if (enable_irqs_function)
  225.         enable_irqs_function(irqmask);
  226.     else
  227.         panic("No enable_irqs_function.");
  228. }
  229.  
  230. void trap_virtual_disable_irqs(uint16_t irqmask)
  231. {
  232.     if (disable_irqs_function)
  233.         disable_irqs_function(irqmask);
  234.     else
  235.         panic("No disable_irqs_function.");
  236. }
  237.  
  238. /** @}
  239.  */
  240.