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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. static void PRINT_INFO_ERRCODE(istate_t *istate)
  53. {
  54.     char *symbol = get_symtab_entry(istate->eip);
  55.  
  56.     if (!symbol)
  57.         symbol = "";
  58.  
  59.     if (CPU)
  60.         printf("----------------EXCEPTION OCCURED (cpu%d)----------------\n", CPU->id);
  61.     else
  62.         printf("----------------EXCEPTION OCCURED----------------\n");
  63.        
  64.     printf("%%eip: %X (%s)\n",istate->eip,symbol);
  65.     printf("ERROR_WORD=%X\n", istate->error_word);
  66.     printf("%%cs=%X,flags=%X\n", istate->cs, istate->eflags);
  67.     printf("%%eax=%X, %%ebx=%X, %%ecx=%X, %%edx=%X\n",  istate->eax,istate->ebx,istate->ecx,istate->edx);
  68.     printf("%%esi=%X, %%edi=%X, %%ebp=%X, %%esp=%X\n",  istate->esi,istate->edi,istate->ebp,istate->esp);
  69.     printf("stack: %X, %X, %X, %X\n", istate->stack[0], istate->stack[1], istate->stack[2], istate->stack[3]);
  70.     printf("       %X, %X, %X, %X\n", istate->stack[4], istate->stack[5], istate->stack[6], istate->stack[7]);
  71. }
  72.  
  73. void null_interrupt(int n, istate_t *istate)
  74. {
  75.     PRINT_INFO_ERRCODE(istate);
  76.     panic("unserviced interrupt: %d\n", n);
  77. }
  78.  
  79. void gp_fault(int n, istate_t *istate)
  80. {
  81.     PRINT_INFO_ERRCODE(istate);
  82.     panic("general protection fault\n");
  83. }
  84.  
  85. void ss_fault(int n, istate_t *istate)
  86. {
  87.     PRINT_INFO_ERRCODE(istate);
  88.     panic("stack fault\n");
  89. }
  90.  
  91. void nm_fault(int n, istate_t *istate)
  92. {
  93. #ifdef CONFIG_FPU_LAZY    
  94.     scheduler_fpu_lazy_request();
  95. #else
  96.     panic("fpu fault");
  97. #endif
  98. }
  99.  
  100. void page_fault(int n, istate_t *istate)
  101. {
  102.     __address page;
  103.  
  104.     page = read_cr2();
  105.     if (!as_page_fault(page)) {
  106.         PRINT_INFO_ERRCODE(istate);
  107.         printf("page fault address: %X\n", page);
  108.         panic("page fault\n");
  109.     }
  110. }
  111.  
  112. void syscall(int n, istate_t *istate)
  113. {
  114.     interrupts_enable();
  115.     if (istate->esi < SYSCALL_END)
  116.         istate->eax = syscall_table[istate->esi](istate->eax, istate->ebx, istate->ecx, istate->edx);
  117.     else
  118.         panic("Undefined syscall %d", istate->esi);
  119.     interrupts_disable();
  120. }
  121.  
  122. void tlb_shootdown_ipi(int n, istate_t *istate)
  123. {
  124.     trap_virtual_eoi();
  125.     tlb_shootdown_ipi_recv();
  126. }
  127.  
  128. void trap_virtual_enable_irqs(__u16 irqmask)
  129. {
  130.     if (enable_irqs_function)
  131.         enable_irqs_function(irqmask);
  132.     else
  133.         panic("no enable_irqs_function\n");
  134. }
  135.  
  136. void trap_virtual_disable_irqs(__u16 irqmask)
  137. {
  138.     if (disable_irqs_function)
  139.         disable_irqs_function(irqmask);
  140.     else
  141.         panic("no disable_irqs_function\n");
  142. }
  143.  
  144. void trap_virtual_eoi(void)
  145. {
  146.     if (eoi_function)
  147.         eoi_function();
  148.     else
  149.         panic("no eoi_function\n");
  150.  
  151. }
  152.