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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. #include <symtab.h>
  40.  
  41. /*
  42.  * Interrupt and exception dispatching.
  43.  */
  44.  
  45. static iroutine ivt[IVT_ITEMS];
  46.  
  47. void (* disable_irqs_function)(__u16 irqmask) = NULL;
  48. void (* enable_irqs_function)(__u16 irqmask) = NULL;
  49. void (* eoi_function)(void) = NULL;
  50.  
  51. #define PRINT_INFO_ERRCODE(x) { \
  52.     char *symbol = get_symtab_entry(stack[1]); \
  53.     if (!symbol) \
  54.         symbol = ""; \
  55.     printf("----------------EXCEPTION OCCURED----------------\n"); \
  56.     printf("%%eip: %X (%s)\n",x[1],symbol); \
  57.     printf("ERROR_WORD=%X\n", x[0]); \
  58.     printf("%%cs=%X,flags=%X\n", x[2], x[3]); \
  59.     printf("%%eax=%X, %%ebx=%X, %%ecx=%X, %%edx=%X\n",\
  60.            x[-2],x[-5],x[-3],x[-4]); \
  61.     printf("%%esi=%X, %%edi=%X, %%ebp=%X, %%esp=%X\n",\
  62.            x[-8],x[-9],x[-1],x); \
  63.     printf("stack: %X, %X, %X, %X\n", x[4], x[5], x[6], x[7]); \
  64.     printf("       %X, %X, %X, %X\n", x[8], x[9], x[10], x[11]); \
  65.         }
  66.  
  67. iroutine trap_register(__u8 n, iroutine f)
  68. {
  69.     ASSERT(n < IVT_ITEMS);
  70.    
  71.     iroutine old;
  72.    
  73.     old = ivt[n];
  74.     ivt[n] = f;
  75.    
  76.     return old;
  77. }
  78.  
  79. /*
  80.  * Called directly from the assembler code.
  81.  * CPU is cpu_priority_high().
  82.  */
  83. void trap_dispatcher(__u8 n, __native stack[])
  84. {
  85.     ASSERT(n < IVT_ITEMS);
  86.    
  87.     ivt[n](n, stack);
  88. }
  89.  
  90. void null_interrupt(__u8 n, __native stack[])
  91. {
  92.     printf("int %d: null_interrupt\n", n);
  93.     printf("stack: %L, %L, %L, %L\n", stack[0], stack[1], stack[2], stack[3]);
  94.     panic("unserviced interrupt\n");
  95. }
  96.  
  97. void gp_fault(__u8 n, __native stack[])
  98. {
  99.     PRINT_INFO_ERRCODE(stack);
  100.     panic("general protection fault\n");
  101. }
  102.  
  103. void ss_fault(__u8 n, __native stack[])
  104. {
  105.     PRINT_INFO_ERRCODE(stack);
  106.     panic("stack fault\n");
  107. }
  108.  
  109.  
  110. void nm_fault(__u8 n, __native stack[])
  111. {
  112.     reset_TS_flag();
  113.     if (CPU->fpu_owner != NULL) {  
  114.         fpu_lazy_context_save(&((CPU->fpu_owner)->saved_fpu_context));
  115.         CPU->fpu_owner->fpu_context_engaged=0; /* don't prevent migration */
  116.     }
  117.     if (THREAD->fpu_context_exists)
  118.         fpu_lazy_context_restore(&(THREAD->saved_fpu_context));
  119.     else {
  120.         fpu_init();
  121.         THREAD->fpu_context_exists=1;
  122.     }
  123.     CPU->fpu_owner=THREAD;
  124. }
  125.  
  126.  
  127.  
  128. void page_fault(__u8 n, __native stack[])
  129. {
  130.     PRINT_INFO_ERRCODE(stack);
  131.     printf("page fault address: %X\n", read_cr2());
  132.     panic("page fault\n");
  133. }
  134.  
  135. void syscall(__u8 n, __native stack[])
  136. {
  137.     printf("cpu%d: syscall\n", CPU->id);
  138.     thread_usleep(1000);
  139. }
  140.  
  141. void tlb_shootdown_ipi(__u8 n, __native stack[])
  142. {
  143.     trap_virtual_eoi();
  144.     tlb_shootdown_ipi_recv();
  145. }
  146.  
  147. void wakeup_ipi(__u8 n, __native stack[])
  148. {
  149.     trap_virtual_eoi();
  150. }
  151.  
  152. void trap_virtual_enable_irqs(__u16 irqmask)
  153. {
  154.     if (enable_irqs_function)
  155.         enable_irqs_function(irqmask);
  156.     else
  157.         panic("no enable_irqs_function\n");
  158. }
  159.  
  160. void trap_virtual_disable_irqs(__u16 irqmask)
  161. {
  162.     if (disable_irqs_function)
  163.         disable_irqs_function(irqmask);
  164.     else
  165.         panic("no disable_irqs_function\n");
  166. }
  167.  
  168. void trap_virtual_eoi(void)
  169. {
  170.     if (eoi_function)
  171.         eoi_function();
  172.     else
  173.         panic("no eoi_function\n");
  174.  
  175. }
  176.