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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 <print.h>
  31. #include <debug.h>
  32. #include <panic.h>
  33. #include <arch/drivers/i8259.h>
  34. #include <func.h>
  35. #include <cpu.h>
  36. #include <arch/asm.h>
  37. #include <mm/tlb.h>
  38. #include <mm/as.h>
  39. #include <arch.h>
  40. #include <symtab.h>
  41. #include <arch/asm.h>
  42. #include <proc/scheduler.h>
  43. #include <proc/thread.h>
  44. #include <proc/task.h>
  45. #include <synch/spinlock.h>
  46. #include <arch/ddi/ddi.h>
  47. #include <interrupt.h>
  48. #include <ipc/irq.h>
  49.  
  50. void print_info_errcode(int n, istate_t *istate)
  51. {
  52.     char *symbol;
  53. /*  __u64 *x = &istate->stack[0]; */
  54.  
  55.     if (!(symbol=get_symtab_entry(istate->rip)))
  56.         symbol = "";
  57.  
  58.     printf("-----EXCEPTION(%d) OCCURED----- ( %s )\n",n, __FUNCTION__);
  59.     printf("%%rip: %#llX (%s)\n",istate->rip, symbol);
  60.     printf("ERROR_WORD=%#llX\n", istate->error_word);
  61.     printf("%%rcs=%#llX, flags=%#llX, %%cr0=%#llX\n", istate->cs, istate->rflags,read_cr0());
  62.     printf("%%rax=%#llX, %%rcx=%#llX, %%rdx=%#llX\n",istate->rax,istate->rcx,istate->rdx);
  63.     printf("%%rsi=%#llX, %%rdi=%#llX, %%r8 =%#llX\n",istate->rsi,istate->rdi,istate->r8);
  64.     printf("%%r9 =%#llX, %%r10 =%#llX, %%r11=%#llX\n",istate->r9,istate->r10,istate->r11);
  65. #ifdef CONFIG_DEBUG_ALLREGS
  66.     printf("%%r12=%#llX, %%r13=%#llX, %%r14=%#llX\n",istate->r12,istate->r13,istate->r14);
  67.     printf("%%r15=%#llX, %%rbx=%#llX, %%rbp=%#llX\n",istate->r15,istate->rbx,&istate->rbp);
  68. #endif
  69.     printf("%%rsp=%#llX\n",&istate->stack[0]);
  70. }
  71.  
  72. /*
  73.  * Interrupt and exception dispatching.
  74.  */
  75.  
  76. void (* disable_irqs_function)(__u16 irqmask) = NULL;
  77. void (* enable_irqs_function)(__u16 irqmask) = NULL;
  78. void (* eoi_function)(void) = NULL;
  79.  
  80. void null_interrupt(int n, istate_t *istate)
  81. {
  82.     fault_if_from_uspace(istate, "unserviced interrupt: %d", n);
  83.     print_info_errcode(n, istate);
  84.     panic("unserviced interrupt\n");
  85. }
  86.  
  87. /** General Protection Fault. */
  88. void gp_fault(int n, istate_t *istate)
  89. {
  90.     if (TASK) {
  91.         count_t ver;
  92.  
  93.         spinlock_lock(&TASK->lock);
  94.         ver = TASK->arch.iomapver;
  95.         spinlock_unlock(&TASK->lock);
  96.  
  97.         if (CPU->arch.iomapver_copy != ver) {
  98.             /*
  99.              * This fault can be caused by an early access
  100.              * to I/O port because of an out-dated
  101.              * I/O Permission bitmap installed on CPU.
  102.              * Install the fresh copy and restart
  103.              * the instruction.
  104.              */
  105.             io_perm_bitmap_install();
  106.             return;
  107.         }
  108.         fault_if_from_uspace(istate, "general protection fault");
  109.     }
  110.  
  111.     print_info_errcode(n, istate);
  112.     panic("general protection fault\n");
  113. }
  114.  
  115. void ss_fault(int n, istate_t *istate)
  116. {
  117.     fault_if_from_uspace(istate, "stack fault");
  118.     print_info_errcode(n, istate);
  119.     panic("stack fault\n");
  120. }
  121.  
  122. void nm_fault(int n, istate_t *istate)
  123. {
  124. #ifdef CONFIG_FPU_LAZY    
  125.     scheduler_fpu_lazy_request();
  126. #else
  127.     fault_if_from_uspace(istate, "fpu fault");
  128.     panic("fpu fault");
  129. #endif
  130. }
  131.  
  132. void tlb_shootdown_ipi(int n, istate_t *istate)
  133. {
  134.     trap_virtual_eoi();
  135.     tlb_shootdown_ipi_recv();
  136. }
  137.  
  138. void trap_virtual_enable_irqs(__u16 irqmask)
  139. {
  140.     if (enable_irqs_function)
  141.         enable_irqs_function(irqmask);
  142.     else
  143.         panic("no enable_irqs_function\n");
  144. }
  145.  
  146. void trap_virtual_disable_irqs(__u16 irqmask)
  147. {
  148.     if (disable_irqs_function)
  149.         disable_irqs_function(irqmask);
  150.     else
  151.         panic("no disable_irqs_function\n");
  152. }
  153.  
  154. void trap_virtual_eoi(void)
  155. {
  156.     if (eoi_function)
  157.         eoi_function();
  158.     else
  159.         panic("no eoi_function\n");
  160.  
  161. }
  162.  
  163. static void ipc_int(int n, istate_t *istate)
  164. {
  165.     trap_virtual_eoi();
  166.     ipc_irq_send_notif(n-IVT_IRQBASE);
  167. }
  168.  
  169.  
  170. /* Reregister irq to be IPC-ready */
  171. void irq_ipc_bind_arch(__native irq)
  172. {
  173.     if (irq == IRQ_CLK)
  174.         return;
  175.     exc_register(IVT_IRQBASE+irq, "ipc_int", ipc_int);
  176. }
  177.