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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 <syscall/syscall.h>
  31. #include <print.h>
  32. #include <debug.h>
  33. #include <panic.h>
  34. #include <arch/i8259.h>
  35. #include <func.h>
  36. #include <cpu.h>
  37. #include <arch/asm.h>
  38. #include <mm/tlb.h>
  39. #include <mm/as.h>
  40. #include <arch.h>
  41. #include <symtab.h>
  42. #include <proc/thread.h>
  43.  
  44. /*
  45.  * Interrupt and exception dispatching.
  46.  */
  47.  
  48. void (* disable_irqs_function)(__u16 irqmask) = NULL;
  49. void (* enable_irqs_function)(__u16 irqmask) = NULL;
  50. void (* eoi_function)(void) = NULL;
  51.  
  52. #define PRINT_INFO_ERRCODE(st) { \
  53.         __native *x = (__native *) st; \
  54.     char *symbol = get_symtab_entry(x[1]); \
  55.     if (!symbol) \
  56.         symbol = ""; \
  57.     printf("----------------EXCEPTION OCCURED----------------\n"); \
  58.     printf("%%eip: %X (%s)\n",x[1],symbol); \
  59.     printf("ERROR_WORD=%X\n", x[0]); \
  60.     printf("%%cs=%X,flags=%X\n", x[2], x[3]); \
  61.     printf("%%eax=%X, %%ebx=%X, %%ecx=%X, %%edx=%X\n",\
  62.            x[-2],x[-5],x[-3],x[-4]); \
  63.     printf("%%esi=%X, %%edi=%X, %%ebp=%X, %%esp=%X\n",\
  64.            x[-8],x[-9],x[-1],x); \
  65.     printf("stack: %X, %X, %X, %X\n", x[4], x[5], x[6], x[7]); \
  66.     printf("       %X, %X, %X, %X\n", x[8], x[9], x[10], x[11]); \
  67.         }
  68.  
  69. void null_interrupt(int n, void *st)
  70. {
  71.     __native *stack = (__native *) st;
  72.  
  73.     printf("int %d: null_interrupt\n", n);
  74.     printf("stack: %L, %L, %L, %L\n", stack[0], stack[1], stack[2], stack[3]);
  75.     panic("unserviced interrupt\n");
  76. }
  77.  
  78. void gp_fault(int n, void *stack)
  79. {
  80.     PRINT_INFO_ERRCODE(stack);
  81.     panic("general protection fault\n");
  82. }
  83.  
  84. void ss_fault(int n, void *stack)
  85. {
  86.     PRINT_INFO_ERRCODE(stack);
  87.     panic("stack fault\n");
  88. }
  89.  
  90.  
  91. void nm_fault(int n, void *stack)
  92. {
  93. #ifdef CONFIG_FPU_LAZY    
  94.     scheduler_fpu_lazy_request();
  95. #else
  96.     panic("fpu fault");
  97. #endif
  98. }
  99.  
  100.  
  101.  
  102. void page_fault(int n, void *stack)
  103. {
  104.     __address page;
  105.  
  106.     page = read_cr2();
  107.     if (!as_page_fault(page)) {
  108.         PRINT_INFO_ERRCODE(stack);
  109.         printf("page fault address: %X\n", page);
  110.         panic("page fault\n");
  111.     }
  112. }
  113.  
  114. void syscall(int n, void *st)
  115. {
  116.     __native *stack = (__native *) st;
  117.    
  118.     if (stack[-2] < SYSCALL_END)
  119.         stack[-2] = syscall_table[stack[-2]](stack[-5], stack[-3], stack[-4]);
  120.     else
  121.         panic("Undefined syscall %d", stack[-2]);
  122. }
  123.  
  124. void tlb_shootdown_ipi(int n, void *stack)
  125. {
  126.     trap_virtual_eoi();
  127.     tlb_shootdown_ipi_recv();
  128. }
  129.  
  130. void trap_virtual_enable_irqs(__u16 irqmask)
  131. {
  132.     if (enable_irqs_function)
  133.         enable_irqs_function(irqmask);
  134.     else
  135.         panic("no enable_irqs_function\n");
  136. }
  137.  
  138. void trap_virtual_disable_irqs(__u16 irqmask)
  139. {
  140.     if (disable_irqs_function)
  141.         disable_irqs_function(irqmask);
  142.     else
  143.         panic("no disable_irqs_function\n");
  144. }
  145.  
  146. void trap_virtual_eoi(void)
  147. {
  148.     if (eoi_function)
  149.         eoi_function();
  150.     else
  151.         panic("no eoi_function\n");
  152.  
  153. }
  154.