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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, %%ecx=%X, %%edx=%X, %%esp=%X\n",  istate->eax,istate->ecx,istate->edx,&istate->stack[0]);
  68. #ifdef CONFIG_DEBUG_ALLREGS
  69.     printf("%%esi=%X, %%edi=%X, %%ebp=%X, %%ebx=%X\n",  istate->esi,istate->edi,istate->ebp,istate->ebx);
  70. #endif
  71.     printf("stack: %X, %X, %X, %X\n", istate->stack[0], istate->stack[1], istate->stack[2], istate->stack[3]);
  72.     printf("       %X, %X, %X, %X\n", istate->stack[4], istate->stack[5], istate->stack[6], istate->stack[7]);
  73. }
  74.  
  75. void null_interrupt(int n, istate_t *istate)
  76. {
  77.     PRINT_INFO_ERRCODE(istate);
  78.     panic("unserviced interrupt: %d\n", n);
  79. }
  80.  
  81. void gp_fault(int n, istate_t *istate)
  82. {
  83.     PRINT_INFO_ERRCODE(istate);
  84.     panic("general protection fault\n");
  85. }
  86.  
  87. void ss_fault(int n, istate_t *istate)
  88. {
  89.     PRINT_INFO_ERRCODE(istate);
  90.     panic("stack fault\n");
  91. }
  92.  
  93. void simd_fp_exception(int n, istate_t *istate)
  94. {
  95.  
  96.     PRINT_INFO_ERRCODE(istate);
  97.     __u32 mxcsr;
  98.     asm
  99.     (
  100.         "stmxcsr %0;\n"
  101.         :"=m"(mxcsr)
  102.     );
  103.     printf("MXCSR: %X\n",(__native)(mxcsr));
  104.     panic("SIMD FP exception(19)\n");
  105. }
  106.  
  107. void nm_fault(int n, istate_t *istate)
  108. {
  109. #ifdef CONFIG_FPU_LAZY    
  110.     scheduler_fpu_lazy_request();
  111. #else
  112.     panic("fpu fault");
  113. #endif
  114. }
  115.  
  116. void page_fault(int n, istate_t *istate)
  117. {
  118.     __address page;
  119.  
  120.     page = read_cr2();
  121.     if (!as_page_fault(page)) {
  122.         PRINT_INFO_ERRCODE(istate);
  123.         printf("page fault address: %X\n", page);
  124.         panic("page fault\n");
  125.     }
  126. }
  127.  
  128. void syscall(int n, istate_t *istate)
  129. {
  130.     panic("Obsolete syscall handler.");
  131. }
  132.  
  133. void tlb_shootdown_ipi(int n, istate_t *istate)
  134. {
  135.     trap_virtual_eoi();
  136.     tlb_shootdown_ipi_recv();
  137. }
  138.  
  139. void trap_virtual_enable_irqs(__u16 irqmask)
  140. {
  141.     if (enable_irqs_function)
  142.         enable_irqs_function(irqmask);
  143.     else
  144.         panic("no enable_irqs_function\n");
  145. }
  146.  
  147. void trap_virtual_disable_irqs(__u16 irqmask)
  148. {
  149.     if (disable_irqs_function)
  150.         disable_irqs_function(irqmask);
  151.     else
  152.         panic("no disable_irqs_function\n");
  153. }
  154.  
  155. void trap_virtual_eoi(void)
  156. {
  157.     if (eoi_function)
  158.         eoi_function();
  159.     else
  160.         panic("no eoi_function\n");
  161.  
  162. }
  163.