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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.");
  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.");
  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.");
  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.");
  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. #ifdef CONFIG_SMP
  154. static void tlb_shootdown_ipi(int n, istate_t *istate)
  155. {
  156.     trap_virtual_eoi();
  157.     tlb_shootdown_ipi_recv();
  158. }
  159. #endif
  160.  
  161. /** Handler of IRQ exceptions */
  162. static void irq_interrupt(int n, istate_t *istate)
  163. {
  164.     ASSERT(n >= IVT_IRQBASE);
  165.    
  166.     int inum = n - IVT_IRQBASE;
  167.     bool ack = false;
  168.     ASSERT(inum < IRQ_COUNT);
  169.     ASSERT((inum != IRQ_PIC_SPUR) && (inum != IRQ_PIC1));
  170.    
  171.     irq_t *irq = irq_dispatch_and_lock(inum);
  172.     if (irq) {
  173.         /*
  174.          * The IRQ handler was found.
  175.          */
  176.          
  177.         if (irq->preack) {
  178.             /* Send EOI before processing the interrupt */
  179.             trap_virtual_eoi();
  180.             ack = true;
  181.         }
  182.         irq->handler(irq, irq->arg);
  183.         spinlock_unlock(&irq->lock);
  184.     } else {
  185.         /*
  186.          * Spurious interrupt.
  187.          */
  188. #ifdef CONFIG_DEBUG
  189.         printf("cpu%d: spurious interrupt (inum=%d)\n", CPU->id, inum);
  190. #endif
  191.     }
  192.    
  193.     if (!ack)
  194.         trap_virtual_eoi();
  195. }
  196.  
  197. void interrupt_init(void)
  198. {
  199.     int i;
  200.    
  201.     for (i = 0; i < IVT_ITEMS; i++)
  202.         exc_register(i, "null", (iroutine) null_interrupt);
  203.    
  204.     for (i = 0; i < IRQ_COUNT; i++) {
  205.         if ((i != IRQ_PIC_SPUR) && (i != IRQ_PIC1))
  206.             exc_register(IVT_IRQBASE + i, "irq",
  207.                 (iroutine) irq_interrupt);
  208.     }
  209.    
  210.     exc_register(7, "nm_fault", (iroutine) nm_fault);
  211.     exc_register(12, "ss_fault", (iroutine) ss_fault);
  212.     exc_register(13, "gp_fault", (iroutine) gp_fault);
  213.     exc_register(14, "ident_mapper", (iroutine) ident_page_fault);
  214.    
  215. #ifdef CONFIG_SMP
  216.     exc_register(VECTOR_TLB_SHOOTDOWN_IPI, "tlb_shootdown",
  217.         (iroutine) tlb_shootdown_ipi);
  218. #endif
  219. }
  220.  
  221. void trap_virtual_enable_irqs(uint16_t irqmask)
  222. {
  223.     if (enable_irqs_function)
  224.         enable_irqs_function(irqmask);
  225.     else
  226.         panic("No enable_irqs_function.");
  227. }
  228.  
  229. void trap_virtual_disable_irqs(uint16_t irqmask)
  230. {
  231.     if (disable_irqs_function)
  232.         disable_irqs_function(irqmask);
  233.     else
  234.         panic("No disable_irqs_function.");
  235. }
  236.  
  237. /** @}
  238.  */
  239.