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