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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.  /** @addtogroup ia32interrupt ia32
  30.  * @ingroup interrupt
  31.  * @{
  32.  */
  33. /** @file
  34.  */
  35.  
  36. #include <arch/interrupt.h>
  37. #include <syscall/syscall.h>
  38. #include <print.h>
  39. #include <debug.h>
  40. #include <panic.h>
  41. #include <arch/drivers/i8259.h>
  42. #include <func.h>
  43. #include <cpu.h>
  44. #include <arch/asm.h>
  45. #include <mm/tlb.h>
  46. #include <mm/as.h>
  47. #include <arch.h>
  48. #include <symtab.h>
  49. #include <proc/thread.h>
  50. #include <proc/task.h>
  51. #include <synch/spinlock.h>
  52. #include <arch/ddi/ddi.h>
  53. #include <ipc/sysipc.h>
  54. #include <interrupt.h>
  55.  
  56. /*
  57.  * Interrupt and exception dispatching.
  58.  */
  59.  
  60. void (* disable_irqs_function)(__u16 irqmask) = NULL;
  61. void (* enable_irqs_function)(__u16 irqmask) = NULL;
  62. void (* eoi_function)(void) = NULL;
  63.  
  64. void PRINT_INFO_ERRCODE(istate_t *istate)
  65. {
  66.     char *symbol = get_symtab_entry(istate->eip);
  67.  
  68.     if (!symbol)
  69.         symbol = "";
  70.  
  71.     if (CPU)
  72.         printf("----------------EXCEPTION OCCURED (cpu%d)----------------\n", CPU->id);
  73.     else
  74.         printf("----------------EXCEPTION OCCURED----------------\n");
  75.        
  76.     printf("%%eip: %#x (%s)\n",istate->eip,symbol);
  77.     printf("ERROR_WORD=%#x\n", istate->error_word);
  78.     printf("%%cs=%#x,flags=%#x\n", istate->cs, istate->eflags);
  79.     printf("%%eax=%#x, %%ecx=%#x, %%edx=%#x, %%esp=%#x\n",  istate->eax,istate->ecx,istate->edx,&istate->stack[0]);
  80. #ifdef CONFIG_DEBUG_ALLREGS
  81.     printf("%%esi=%#x, %%edi=%#x, %%ebp=%#x, %%ebx=%#x\n",  istate->esi,istate->edi,istate->ebp,istate->ebx);
  82. #endif
  83.     printf("stack: %#x, %#x, %#x, %#x\n", istate->stack[0], istate->stack[1], istate->stack[2], istate->stack[3]);
  84.     printf("       %#x, %#x, %#x, %#x\n", istate->stack[4], istate->stack[5], istate->stack[6], istate->stack[7]);
  85. }
  86.  
  87. void null_interrupt(int n, istate_t *istate)
  88. {
  89.     fault_if_from_uspace(istate, "unserviced interrupt: %d", n);
  90.  
  91.     PRINT_INFO_ERRCODE(istate);
  92.     panic("unserviced interrupt: %d\n", n);
  93. }
  94.  
  95. /** General Protection Fault. */
  96. void gp_fault(int n, istate_t *istate)
  97. {
  98.     if (TASK) {
  99.         count_t ver;
  100.        
  101.         spinlock_lock(&TASK->lock);
  102.         ver = TASK->arch.iomapver;
  103.         spinlock_unlock(&TASK->lock);
  104.    
  105.         if (CPU->arch.iomapver_copy != ver) {
  106.             /*
  107.              * This fault can be caused by an early access
  108.              * to I/O port because of an out-dated
  109.              * I/O Permission bitmap installed on CPU.
  110.              * Install the fresh copy and restart
  111.              * the instruction.
  112.              */
  113.             io_perm_bitmap_install();
  114.             return;
  115.         }
  116.         fault_if_from_uspace(istate, "general protection fault");
  117.     }
  118.  
  119.     PRINT_INFO_ERRCODE(istate);
  120.     panic("general protection fault\n");
  121. }
  122.  
  123. void ss_fault(int n, istate_t *istate)
  124. {
  125.     fault_if_from_uspace(istate, "stack fault");
  126.  
  127.     PRINT_INFO_ERRCODE(istate);
  128.     panic("stack fault\n");
  129. }
  130.  
  131. void simd_fp_exception(int n, istate_t *istate)
  132. {
  133.     __u32 mxcsr;
  134.     asm
  135.     (
  136.         "stmxcsr %0;\n"
  137.         :"=m"(mxcsr)
  138.     );
  139.     fault_if_from_uspace(istate, "SIMD FP exception(19), MXCSR: %#zX",
  140.                  (__native)mxcsr);
  141.  
  142.     PRINT_INFO_ERRCODE(istate);
  143.     printf("MXCSR: %#zX\n",(__native)(mxcsr));
  144.     panic("SIMD FP exception(19)\n");
  145. }
  146.  
  147. void nm_fault(int n, istate_t *istate)
  148. {
  149. #ifdef CONFIG_FPU_LAZY    
  150.     scheduler_fpu_lazy_request();
  151. #else
  152.     fault_if_from_uspace(istate, "fpu fault");
  153.     panic("fpu fault");
  154. #endif
  155. }
  156.  
  157. void syscall(int n, istate_t *istate)
  158. {
  159.     panic("Obsolete syscall handler.");
  160. }
  161.  
  162. void tlb_shootdown_ipi(int n, istate_t *istate)
  163. {
  164.     trap_virtual_eoi();
  165.     tlb_shootdown_ipi_recv();
  166. }
  167.  
  168. void trap_virtual_enable_irqs(__u16 irqmask)
  169. {
  170.     if (enable_irqs_function)
  171.         enable_irqs_function(irqmask);
  172.     else
  173.         panic("no enable_irqs_function\n");
  174. }
  175.  
  176. void trap_virtual_disable_irqs(__u16 irqmask)
  177. {
  178.     if (disable_irqs_function)
  179.         disable_irqs_function(irqmask);
  180.     else
  181.         panic("no disable_irqs_function\n");
  182. }
  183.  
  184. void trap_virtual_eoi(void)
  185. {
  186.     if (eoi_function)
  187.         eoi_function();
  188.     else
  189.         panic("no eoi_function\n");
  190.  
  191. }
  192.  
  193. static void ipc_int(int n, istate_t *istate)
  194. {
  195.     ipc_irq_send_notif(n-IVT_IRQBASE);
  196.     trap_virtual_eoi();
  197. }
  198.  
  199.  
  200. /* Reregister irq to be IPC-ready */
  201. void irq_ipc_bind_arch(__native irq)
  202. {
  203.     if (irq == IRQ_CLK)
  204.         return;
  205.     trap_virtual_enable_irqs(1 << irq);
  206.     exc_register(IVT_IRQBASE+irq, "ipc_int", ipc_int);
  207. }
  208.  
  209.  /** @}
  210.  */
  211.  
  212.