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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. #include <arch/interrupt.h>
  30. #include <print.h>
  31. #include <panic.h>
  32. #include <arch/i8259.h>
  33. #include <func.h>
  34. #include <cpu.h>
  35. #include <arch/asm.h>
  36.  
  37. /*
  38.  * Interrupt and exception dispatching.
  39.  */
  40.  
  41. static iroutine ivt[IVT_ITEMS];
  42.  
  43. void (* disable_irqs_function)(__u16 irqmask) = NULL;
  44. void (* enable_irqs_function)(__u16 irqmask) = NULL;
  45. void (* eoi_function)(void) = NULL;
  46.  
  47. iroutine trap_register(__u8 n, iroutine f)
  48. {
  49.     iroutine old;
  50.    
  51.     old = ivt[n];
  52.     ivt[n] = f;
  53.    
  54.         return old;
  55. }
  56.  
  57. /*
  58.  * Called directly from the assembler code.
  59.  * CPU is cpu_priority_high().
  60.  */
  61. void trap_dispatcher(__u8 n, __u32 stack[])
  62. {
  63.     ivt[n](n,stack);
  64. }
  65.  
  66. void null_interrupt(__u8 n, __u32 stack[])
  67. {
  68.     printf("int %d: null_interrupt\n", n);
  69.     printf("stack: %L, %L, %L, %L\n", stack[0], stack[1], stack[2], stack[3]);
  70.     panic("unserviced interrupt\n");
  71. }
  72.  
  73. void gp_fault(__u8 n, __u32 stack[])
  74. {
  75.     printf("stack[0]=%X, %%eip=%X, %%cs=%X, flags=%X\n", stack[0], stack[1], stack[2], stack[3]);
  76.     printf("%%eax=%L, %%ebx=%L, %%ecx=%L, %%edx=%L,\n%%edi=%L, %%esi=%L, %%ebp=%L, %%esp=%L\n", stack[-2], stack[-5], stack[-3], stack[-4], stack[-9], stack[-8], stack[-1], stack);
  77.     printf("stack: %X, %X, %X, %X\n", stack[4], stack[5], stack[6], stack[7]);
  78.     panic("general protection fault\n");
  79. }
  80.  
  81. void page_fault(__u8 n, __u32 stack[])
  82. {
  83.     printf("page fault address: %X\n", cpu_read_cr2());
  84.     printf("stack[0]=%X, %%eip=%X, %%cs=%X, flags=%X\n", stack[0], stack[1], stack[2], stack[3]);
  85.     printf("%%eax=%L, %%ebx=%L, %%ecx=%L, %%edx=%L,\n%%edi=%L, %%esi=%L, %%ebp=%L, %%esp=%L\n", stack[-2], stack[-5], stack[-3], stack[-4], stack[-9], stack[-8], stack[-1], stack);
  86.     printf("stack: %X, %X, %X, %X\n", stack[4], stack[5], stack[6], stack[7]);
  87.     panic("page fault\n");
  88. }
  89.  
  90. void syscall(__u8 n, __u32 stack[])
  91. {
  92.     printf("syscall... ");
  93.     thread_sleep(1);
  94. }
  95.  
  96. void trap_virtual_enable_irqs(__u16 irqmask)
  97. {
  98.     if (enable_irqs_function)
  99.         enable_irqs_function(irqmask);
  100.     else
  101.         panic(PANIC "no enable_irqs_function\n");
  102. }
  103.  
  104. void trap_virtual_disable_irqs(__u16 irqmask)
  105. {
  106.     if (disable_irqs_function)
  107.         disable_irqs_function(irqmask);
  108.     else
  109.         panic(PANIC "no disable_irqs_function\n");
  110. }
  111.  
  112. void trap_virtual_eoi(void)
  113. {
  114.     if (eoi_function)
  115.         eoi_function();
  116.     else
  117.         panic(PANIC "no eoi_function\n");
  118.  
  119. }
  120.