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  1. /*
  2.  * Copyright (C) 2006 Martin Decky
  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 xen32interrupt
  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 <func.h>
  41. #include <cpu.h>
  42. #include <arch/asm.h>
  43. #include <mm/tlb.h>
  44. #include <mm/as.h>
  45. #include <arch.h>
  46. #include <symtab.h>
  47. #include <proc/thread.h>
  48. #include <proc/task.h>
  49. #include <synch/spinlock.h>
  50. #include <arch/ddi/ddi.h>
  51. #include <ipc/sysipc.h>
  52. #include <interrupt.h>
  53.  
  54. /*
  55.  * Interrupt and exception dispatching.
  56.  */
  57.  
  58. void (* disable_irqs_function)(uint16_t irqmask) = NULL;
  59. void (* enable_irqs_function)(uint16_t irqmask) = NULL;
  60. void (* eoi_function)(void) = NULL;
  61.  
  62. void PRINT_INFO_ERRCODE(istate_t *istate)
  63. {
  64.     char *symbol = get_symtab_entry(istate->eip);
  65.  
  66.     if (!symbol)
  67.         symbol = "";
  68.  
  69.     if (CPU)
  70.         printf("----------------EXCEPTION OCCURED (cpu%d)----------------\n", CPU->id);
  71.     else
  72.         printf("----------------EXCEPTION OCCURED----------------\n");
  73.        
  74.     printf("%%eip: %#x (%s)\n",istate->eip,symbol);
  75.     printf("ERROR_WORD=%#x\n", istate->error_word);
  76.     printf("%%cs=%#x,flags=%#x\n", istate->cs, istate->eflags);
  77.     printf("%%eax=%#x, %%ecx=%#x, %%edx=%#x, %%esp=%#x\n",  istate->eax,istate->ecx,istate->edx,&istate->stack[0]);
  78. #ifdef CONFIG_DEBUG_ALLREGS
  79.     printf("%%esi=%#x, %%edi=%#x, %%ebp=%#x, %%ebx=%#x\n",  istate->esi,istate->edi,istate->ebp,istate->ebx);
  80. #endif
  81.     printf("stack: %#x, %#x, %#x, %#x\n", istate->stack[0], istate->stack[1], istate->stack[2], istate->stack[3]);
  82.     printf("       %#x, %#x, %#x, %#x\n", istate->stack[4], istate->stack[5], istate->stack[6], istate->stack[7]);
  83. }
  84.  
  85. void null_interrupt(int n, istate_t *istate)
  86. {
  87.     fault_if_from_uspace(istate, "unserviced interrupt: %d", n);
  88.  
  89.     PRINT_INFO_ERRCODE(istate);
  90.     panic("unserviced interrupt: %d\n", n);
  91. }
  92.  
  93. /** General Protection Fault. */
  94. void gp_fault(int n, istate_t *istate)
  95. {
  96.     if (TASK) {
  97.         count_t ver;
  98.        
  99.         spinlock_lock(&TASK->lock);
  100.         ver = TASK->arch.iomapver;
  101.         spinlock_unlock(&TASK->lock);
  102.    
  103.         if (CPU->arch.iomapver_copy != ver) {
  104.             /*
  105.              * This fault can be caused by an early access
  106.              * to I/O port because of an out-dated
  107.              * I/O Permission bitmap installed on CPU.
  108.              * Install the fresh copy and restart
  109.              * the instruction.
  110.              */
  111.             io_perm_bitmap_install();
  112.             return;
  113.         }
  114.         fault_if_from_uspace(istate, "general protection fault");
  115.     }
  116.  
  117.     PRINT_INFO_ERRCODE(istate);
  118.     panic("general protection fault\n");
  119. }
  120.  
  121. void ss_fault(int n, istate_t *istate)
  122. {
  123.     fault_if_from_uspace(istate, "stack fault");
  124.  
  125.     PRINT_INFO_ERRCODE(istate);
  126.     panic("stack fault\n");
  127. }
  128.  
  129. void simd_fp_exception(int n, istate_t *istate)
  130. {
  131.     uint32_t mxcsr;
  132.     asm
  133.     (
  134.         "stmxcsr %0;\n"
  135.         :"=m"(mxcsr)
  136.     );
  137.     fault_if_from_uspace(istate, "SIMD FP exception(19), MXCSR: %#zx",
  138.                  (unative_t)mxcsr);
  139.  
  140.     PRINT_INFO_ERRCODE(istate);
  141.     printf("MXCSR: %#zx\n",(unative_t)(mxcsr));
  142.     panic("SIMD FP exception(19)\n");
  143. }
  144.  
  145. void nm_fault(int n, istate_t *istate)
  146. {
  147. #ifdef CONFIG_FPU_LAZY    
  148.     scheduler_fpu_lazy_request();
  149. #else
  150.     fault_if_from_uspace(istate, "fpu fault");
  151.     panic("fpu fault");
  152. #endif
  153. }
  154.  
  155. void syscall(int n, istate_t *istate)
  156. {
  157.     panic("Obsolete syscall handler.");
  158. }
  159.  
  160. void tlb_shootdown_ipi(int n, istate_t *istate)
  161. {
  162.     trap_virtual_eoi();
  163.     tlb_shootdown_ipi_recv();
  164. }
  165.  
  166. void trap_virtual_enable_irqs(uint16_t irqmask)
  167. {
  168.     if (enable_irqs_function)
  169.         enable_irqs_function(irqmask);
  170.     else
  171.         panic("no enable_irqs_function\n");
  172. }
  173.  
  174. void trap_virtual_disable_irqs(uint16_t irqmask)
  175. {
  176.     if (disable_irqs_function)
  177.         disable_irqs_function(irqmask);
  178.     else
  179.         panic("no disable_irqs_function\n");
  180. }
  181.  
  182. void trap_virtual_eoi(void)
  183. {
  184.     if (eoi_function)
  185.         eoi_function();
  186.     else
  187.         panic("no eoi_function\n");
  188.  
  189. }
  190.  
  191. static void ipc_int(int n, istate_t *istate)
  192. {
  193.     ipc_irq_send_notif(n-IVT_IRQBASE);
  194.     trap_virtual_eoi();
  195. }
  196.  
  197.  
  198. /* Reregister irq to be IPC-ready */
  199. void irq_ipc_bind_arch(unative_t irq)
  200. {
  201.     if (irq == IRQ_CLK)
  202.         return;
  203.     exc_register(IVT_IRQBASE+irq, "ipc_int", ipc_int);
  204.     trap_virtual_enable_irqs(1 << irq);
  205. }
  206.  
  207. /** @}
  208.  */
  209.  
  210.