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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. #include <proc/task.h>
  44. #include <synch/spinlock.h>
  45. #include <arch/ddi/ddi.h>
  46. #include <ipc/sysipc.h>
  47. #include <interrupt.h>
  48.  
  49. /*
  50.  * Interrupt and exception dispatching.
  51.  */
  52.  
  53. void (* disable_irqs_function)(__u16 irqmask) = NULL;
  54. void (* enable_irqs_function)(__u16 irqmask) = NULL;
  55. void (* eoi_function)(void) = NULL;
  56.  
  57. static void PRINT_INFO_ERRCODE(istate_t *istate)
  58. {
  59.     char *symbol = get_symtab_entry(istate->eip);
  60.  
  61.     if (!symbol)
  62.         symbol = "";
  63.  
  64.     if (CPU)
  65.         printf("----------------EXCEPTION OCCURED (cpu%d)----------------\n", CPU->id);
  66.     else
  67.         printf("----------------EXCEPTION OCCURED----------------\n");
  68.        
  69.     printf("%%eip: %#x (%s)\n",istate->eip,symbol);
  70.     printf("ERROR_WORD=%#x\n", istate->error_word);
  71.     printf("%%cs=%#x,flags=%#x\n", istate->cs, istate->eflags);
  72.     printf("%%eax=%#x, %%ecx=%#x, %%edx=%#x, %%esp=%#x\n",  istate->eax,istate->ecx,istate->edx,&istate->stack[0]);
  73. #ifdef CONFIG_DEBUG_ALLREGS
  74.     printf("%%esi=%#x, %%edi=%#x, %%ebp=%#x, %%ebx=%#x\n",  istate->esi,istate->edi,istate->ebp,istate->ebx);
  75. #endif
  76.     printf("stack: %#x, %#x, %#x, %#x\n", istate->stack[0], istate->stack[1], istate->stack[2], istate->stack[3]);
  77.     printf("       %#x, %#x, %#x, %#x\n", istate->stack[4], istate->stack[5], istate->stack[6], istate->stack[7]);
  78. }
  79.  
  80. void null_interrupt(int n, istate_t *istate)
  81. {
  82.     PRINT_INFO_ERRCODE(istate);
  83.     panic("unserviced interrupt: %d\n", n);
  84. }
  85.  
  86. /** General Protection Fault. */
  87. void gp_fault(int n, istate_t *istate)
  88. {
  89.     if (TASK) {
  90.         count_t ver;
  91.        
  92.         spinlock_lock(&TASK->lock);
  93.         ver = TASK->arch.iomapver;
  94.         spinlock_unlock(&TASK->lock);
  95.    
  96.         if (CPU->arch.iomapver_copy != ver) {
  97.             /*
  98.              * This fault can be caused by an early access
  99.              * to I/O port because of an out-dated
  100.              * I/O Permission bitmap installed on CPU.
  101.              * Install the fresh copy and restart
  102.              * the instruction.
  103.              */
  104.             io_perm_bitmap_install();
  105.             return;
  106.         }
  107.     }
  108.  
  109.     PRINT_INFO_ERRCODE(istate);
  110.     panic("general protection fault\n");
  111. }
  112.  
  113. void ss_fault(int n, istate_t *istate)
  114. {
  115.     PRINT_INFO_ERRCODE(istate);
  116.     panic("stack fault\n");
  117. }
  118.  
  119. void simd_fp_exception(int n, istate_t *istate)
  120. {
  121.  
  122.     PRINT_INFO_ERRCODE(istate);
  123.     __u32 mxcsr;
  124.     asm
  125.     (
  126.         "stmxcsr %0;\n"
  127.         :"=m"(mxcsr)
  128.     );
  129.     printf("MXCSR: %#zX\n",(__native)(mxcsr));
  130.     panic("SIMD FP exception(19)\n");
  131. }
  132.  
  133. void nm_fault(int n, istate_t *istate)
  134. {
  135. #ifdef CONFIG_FPU_LAZY    
  136.     scheduler_fpu_lazy_request();
  137. #else
  138.     panic("fpu fault");
  139. #endif
  140. }
  141.  
  142. void page_fault(int n, istate_t *istate)
  143. {
  144.     __address page;
  145.  
  146.     page = read_cr2();
  147.     if (!as_page_fault(page)) {
  148.         PRINT_INFO_ERRCODE(istate);
  149.         printf("page fault address: %#x\n", page);
  150.         panic("page fault\n");
  151.     }
  152. }
  153.  
  154. void syscall(int n, istate_t *istate)
  155. {
  156.     panic("Obsolete syscall handler.");
  157. }
  158.  
  159. void tlb_shootdown_ipi(int n, istate_t *istate)
  160. {
  161.     trap_virtual_eoi();
  162.     tlb_shootdown_ipi_recv();
  163. }
  164.  
  165. void trap_virtual_enable_irqs(__u16 irqmask)
  166. {
  167.     if (enable_irqs_function)
  168.         enable_irqs_function(irqmask);
  169.     else
  170.         panic("no enable_irqs_function\n");
  171. }
  172.  
  173. void trap_virtual_disable_irqs(__u16 irqmask)
  174. {
  175.     if (disable_irqs_function)
  176.         disable_irqs_function(irqmask);
  177.     else
  178.         panic("no disable_irqs_function\n");
  179. }
  180.  
  181. void trap_virtual_eoi(void)
  182. {
  183.     if (eoi_function)
  184.         eoi_function();
  185.     else
  186.         panic("no eoi_function\n");
  187.  
  188. }
  189.  
  190. static void ipc_int(int n, istate_t *istate)
  191. {
  192.     trap_virtual_eoi();
  193.     ipc_irq_send_notif(n-IVT_IRQBASE);
  194. }
  195.  
  196.  
  197. /* Reregister irq to be IPC-ready */
  198. void irq_ipc_bind_arch(__native irq)
  199. {
  200.     if (irq == IRQ_CLK)
  201.         return;
  202.     exc_register(IVT_IRQBASE+irq, "ipc_int", ipc_int);
  203. }
  204.