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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 <debug.h>
  32. #include <panic.h>
  33. #include <arch/i8259.h>
  34. #include <func.h>
  35. #include <cpu.h>
  36. #include <arch/asm.h>
  37. #include <mm/tlb.h>
  38. #include <arch.h>
  39.  
  40. /*
  41.  * Interrupt and exception dispatching.
  42.  */
  43.  
  44. static iroutine ivt[IVT_ITEMS];
  45.  
  46. void (* disable_irqs_function)(__u16 irqmask) = NULL;
  47. void (* enable_irqs_function)(__u16 irqmask) = NULL;
  48. void (* eoi_function)(void) = NULL;
  49.  
  50. iroutine trap_register(__u8 n, iroutine f)
  51. {
  52.     ASSERT(n < IVT_ITEMS);
  53.    
  54.     iroutine old;
  55.    
  56.     old = ivt[n];
  57.     ivt[n] = f;
  58.    
  59.     return old;
  60. }
  61.  
  62. /*
  63.  * Called directly from the assembler code.
  64.  * CPU is cpu_priority_high().
  65.  */
  66. void trap_dispatcher(__u8 n, __u32 stack[])
  67. {
  68.     ASSERT(n < IVT_ITEMS);
  69.    
  70.     ivt[n](n, stack);
  71. }
  72.  
  73. void null_interrupt(__u8 n, __u32 stack[])
  74. {
  75.     printf("int %d: null_interrupt\n", n);
  76.     printf("stack: %L, %L, %L, %L\n", stack[0], stack[1], stack[2], stack[3]);
  77.     panic("unserviced interrupt\n");
  78. }
  79.  
  80. void gp_fault(__u8 n, __u32 stack[])
  81. {
  82.     printf("stack[0]=%X, %%eip=%X, %%cs=%X, flags=%X\n", stack[0], stack[1], stack[2], stack[3]);
  83.     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);
  84.     printf("stack: %X, %X, %X, %X\n", stack[4], stack[5], stack[6], stack[7]);
  85.     panic("general protection fault\n");
  86. }
  87.  
  88. void nm_fault(__u8 n, __u32 stack[])
  89. {
  90.  
  91.         if (((CPU->arch).fpu_owner)!=NULL)
  92.     {  
  93.         fpu_lazy_context_save(&(((CPU->arch).fpu_owner)->saved_fpu_context));
  94.         ((CPU->arch).fpu_owner)->fpu_context_engaged=0; /* Enables migration */
  95.     }
  96.    
  97.     if(THREAD->fpu_context_exists) fpu_lazy_context_restore(&(THREAD->saved_fpu_context));
  98.         else {fpu_init();THREAD->fpu_context_exists=1;}
  99.  
  100.     (CPU->arch).fpu_owner=THREAD;
  101.  
  102.     reset_TS_flag();
  103.    
  104. //  panic("#NM fault\n");
  105. }
  106.  
  107.  
  108.  
  109. void page_fault(__u8 n, __u32 stack[])
  110. {
  111.     printf("page fault address: %X\n", cpu_read_cr2());
  112.     printf("stack[0]=%X, %%eip=%X, %%cs=%X, flags=%X\n", stack[0], stack[1], stack[2], stack[3]);
  113.     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);
  114.     printf("stack: %X, %X, %X, %X\n", stack[4], stack[5], stack[6], stack[7]);
  115.     printf("page fault\n");
  116.     cpu_halt();
  117. }
  118.  
  119. void syscall(__u8 n, __u32 stack[])
  120. {
  121.     printf("cpu%d: syscall\n", CPU->id);
  122.     thread_usleep(1000);
  123. }
  124.  
  125. void tlb_shootdown_ipi(__u8 n, __u32 stack[])
  126. {
  127.     trap_virtual_eoi();
  128.     tlb_shootdown_ipi_recv();
  129. }
  130.  
  131. void wakeup_ipi(__u8 n, __u32 stack[])
  132. {
  133.     trap_virtual_eoi();
  134. }
  135.  
  136. void trap_virtual_enable_irqs(__u16 irqmask)
  137. {
  138.     if (enable_irqs_function)
  139.         enable_irqs_function(irqmask);
  140.     else
  141.         panic("no enable_irqs_function\n");
  142. }
  143.  
  144. void trap_virtual_disable_irqs(__u16 irqmask)
  145. {
  146.     if (disable_irqs_function)
  147.         disable_irqs_function(irqmask);
  148.     else
  149.         panic("no disable_irqs_function\n");
  150. }
  151.  
  152. void trap_virtual_eoi(void)
  153. {
  154.     if (eoi_function)
  155.         eoi_function();
  156.     else
  157.         panic("no eoi_function\n");
  158.  
  159. }
  160.