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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.     printf("%%rsp=%#llx\n", &istate->stack[0]);
  84. }
  85.  
  86. static void trap_virtual_eoi(void)
  87. {
  88.     if (eoi_function)
  89.         eoi_function();
  90.     else
  91.         panic("No eoi_function.");
  92.  
  93. }
  94.  
  95. static void null_interrupt(int n, istate_t *istate)
  96. {
  97.     fault_if_from_uspace(istate, "Unserviced interrupt: %d.", n);
  98.     decode_istate(n, istate);
  99.     panic("Unserviced interrupt.");
  100. }
  101.  
  102. /** General Protection Fault. */
  103. static void gp_fault(int n, istate_t *istate)
  104. {
  105.     if (TASK) {
  106.         count_t ver;
  107.  
  108.         spinlock_lock(&TASK->lock);
  109.         ver = TASK->arch.iomapver;
  110.         spinlock_unlock(&TASK->lock);
  111.  
  112.         if (CPU->arch.iomapver_copy != ver) {
  113.             /*
  114.              * This fault can be caused by an early access
  115.              * to I/O port because of an out-dated
  116.              * I/O Permission bitmap installed on CPU.
  117.              * Install the fresh copy and restart
  118.              * the instruction.
  119.              */
  120.             io_perm_bitmap_install();
  121.             return;
  122.         }
  123.         fault_if_from_uspace(istate, "General protection fault.");
  124.     }
  125.  
  126.     decode_istate(n, istate);
  127.     panic("General protection fault.");
  128. }
  129.  
  130. static void ss_fault(int n, istate_t *istate)
  131. {
  132.     fault_if_from_uspace(istate, "Stack fault.");
  133.     decode_istate(n, istate);
  134.     panic("Stack fault.");
  135. }
  136.  
  137. static void nm_fault(int n, istate_t *istate)
  138. {
  139. #ifdef CONFIG_FPU_LAZY
  140.     scheduler_fpu_lazy_request();
  141. #else
  142.     fault_if_from_uspace(istate, "FPU fault.");
  143.     panic("FPU fault.");
  144. #endif
  145. }
  146.  
  147. #ifdef CONFIG_SMP
  148. static void tlb_shootdown_ipi(int n, istate_t *istate)
  149. {
  150.     trap_virtual_eoi();
  151.     tlb_shootdown_ipi_recv();
  152. }
  153. #endif
  154.  
  155. /** Handler of IRQ exceptions */
  156. static void irq_interrupt(int n, istate_t *istate)
  157. {
  158.     ASSERT(n >= IVT_IRQBASE);
  159.    
  160.     int inum = n - IVT_IRQBASE;
  161.     bool ack = false;
  162.     ASSERT(inum < IRQ_COUNT);
  163.     ASSERT((inum != IRQ_PIC_SPUR) && (inum != IRQ_PIC1));
  164.    
  165.     irq_t *irq = irq_dispatch_and_lock(inum);
  166.     if (irq) {
  167.         /*
  168.          * The IRQ handler was found.
  169.          */
  170.          
  171.         if (irq->preack) {
  172.             /* Send EOI before processing the interrupt */
  173.             trap_virtual_eoi();
  174.             ack = true;
  175.         }
  176.         irq->handler(irq, irq->arg);
  177.         spinlock_unlock(&irq->lock);
  178.     } else {
  179.         /*
  180.          * Spurious interrupt.
  181.          */
  182. #ifdef CONFIG_DEBUG
  183.         printf("cpu%d: spurious interrupt (inum=%d)\n", CPU->id, inum);
  184. #endif
  185.     }
  186.    
  187.     if (!ack)
  188.         trap_virtual_eoi();
  189. }
  190.  
  191. void interrupt_init(void)
  192. {
  193.     int i;
  194.    
  195.     for (i = 0; i < IVT_ITEMS; i++)
  196.         exc_register(i, "null", (iroutine) null_interrupt);
  197.    
  198.     for (i = 0; i < IRQ_COUNT; i++) {
  199.         if ((i != IRQ_PIC_SPUR) && (i != IRQ_PIC1))
  200.             exc_register(IVT_IRQBASE + i, "irq",
  201.                 (iroutine) irq_interrupt);
  202.     }
  203.    
  204.     exc_register(7, "nm_fault", (iroutine) nm_fault);
  205.     exc_register(12, "ss_fault", (iroutine) ss_fault);
  206.     exc_register(13, "gp_fault", (iroutine) gp_fault);
  207.     exc_register(14, "ident_mapper", (iroutine) ident_page_fault);
  208.    
  209. #ifdef CONFIG_SMP
  210.     exc_register(VECTOR_TLB_SHOOTDOWN_IPI, "tlb_shootdown",
  211.         (iroutine) tlb_shootdown_ipi);
  212. #endif
  213. }
  214.  
  215. void trap_virtual_enable_irqs(uint16_t irqmask)
  216. {
  217.     if (enable_irqs_function)
  218.         enable_irqs_function(irqmask);
  219.     else
  220.         panic("No enable_irqs_function.");
  221. }
  222.  
  223. void trap_virtual_disable_irqs(uint16_t irqmask)
  224. {
  225.     if (disable_irqs_function)
  226.         disable_irqs_function(irqmask);
  227.     else
  228.         panic("No disable_irqs_function.");
  229. }
  230.  
  231. /** @}
  232.  */
  233.