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