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