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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. #include <mm/tlb.h>
  37.  
  38. /*
  39.  * Interrupt and exception dispatching.
  40.  */
  41.  
  42. static iroutine ivt[IVT_ITEMS];
  43.  
  44. void (* disable_irqs_function)(__u16 irqmask) = NULL;
  45. void (* enable_irqs_function)(__u16 irqmask) = NULL;
  46. void (* eoi_function)(void) = NULL;
  47.  
  48. iroutine trap_register(__u8 n, iroutine f)
  49. {
  50.     iroutine old;
  51.    
  52.     old = ivt[n];
  53.     ivt[n] = f;
  54.    
  55.         return old;
  56. }
  57.  
  58. /*
  59.  * Called directly from the assembler code.
  60.  * CPU is cpu_priority_high().
  61.  */
  62. void trap_dispatcher(__u8 n, __u32 stack[])
  63. {
  64.     ivt[n](n,stack);
  65. }
  66.  
  67. void null_interrupt(__u8 n, __u32 stack[])
  68. {
  69.     printf("int %d: null_interrupt\n", n);
  70.     printf("stack: %L, %L, %L, %L\n", stack[0], stack[1], stack[2], stack[3]);
  71.     panic("unserviced interrupt\n");
  72. }
  73.  
  74. void gp_fault(__u8 n, __u32 stack[])
  75. {
  76.     printf("stack[0]=%X, %%eip=%X, %%cs=%X, flags=%X\n", stack[0], stack[1], stack[2], stack[3]);
  77.     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);
  78.     printf("stack: %X, %X, %X, %X\n", stack[4], stack[5], stack[6], stack[7]);
  79.     panic("general protection fault\n");
  80. }
  81.  
  82. void page_fault(__u8 n, __u32 stack[])
  83. {
  84.     printf("page fault address: %X\n", cpu_read_cr2());
  85.     printf("stack[0]=%X, %%eip=%X, %%cs=%X, flags=%X\n", stack[0], stack[1], stack[2], stack[3]);
  86.     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);
  87.     printf("stack: %X, %X, %X, %X\n", stack[4], stack[5], stack[6], stack[7]);
  88.     panic("page fault\n");
  89. }
  90.  
  91. void syscall(__u8 n, __u32 stack[])
  92. {
  93.     printf("syscall... ");
  94.     thread_sleep(1);
  95. }
  96.  
  97. void tlb_shutdown_ipi(__u8 n, __u32 stack[])
  98. {
  99.     trap_virtual_eoi();
  100.     tlb_shutdown_ipi_recv();
  101. }
  102.  
  103. void trap_virtual_enable_irqs(__u16 irqmask)
  104. {
  105.     if (enable_irqs_function)
  106.         enable_irqs_function(irqmask);
  107.     else
  108.         panic(PANIC "no enable_irqs_function\n");
  109. }
  110.  
  111. void trap_virtual_disable_irqs(__u16 irqmask)
  112. {
  113.     if (disable_irqs_function)
  114.         disable_irqs_function(irqmask);
  115.     else
  116.         panic(PANIC "no disable_irqs_function\n");
  117. }
  118.  
  119. void trap_virtual_eoi(void)
  120. {
  121.     if (eoi_function)
  122.         eoi_function();
  123.     else
  124.         panic(PANIC "no eoi_function\n");
  125.  
  126. }
  127.