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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 amd64interrupt
  30.  * @{
  31.  */
  32. /** @file
  33.  */
  34.  
  35. #include <arch/interrupt.h>
  36. #include <print.h>
  37. #include <debug.h>
  38. #include <panic.h>
  39. #include <arch/drivers/i8259.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 <arch/asm.h>
  48. #include <proc/scheduler.h>
  49. #include <proc/thread.h>
  50. #include <proc/task.h>
  51. #include <synch/spinlock.h>
  52. #include <arch/ddi/ddi.h>
  53. #include <interrupt.h>
  54. #include <ddi/irq.h>
  55.  
  56. /*
  57.  * Interrupt and exception dispatching.
  58.  */
  59.  
  60. void (* disable_irqs_function)(uint16_t irqmask) = NULL;
  61. void (* enable_irqs_function)(uint16_t irqmask) = NULL;
  62. void (* eoi_function)(void) = NULL;
  63.  
  64. void decode_istate(int n, istate_t *istate)
  65. {
  66.     char *symbol;
  67. /*  uint64_t *x = &istate->stack[0]; */
  68.  
  69.     if (!(symbol=get_symtab_entry(istate->rip)))
  70.         symbol = "";
  71.  
  72.     printf("-----EXCEPTION(%d) OCCURED----- ( %s )\n",n, __FUNCTION__);
  73.     printf("%%rip: %#llx (%s)\n",istate->rip, symbol);
  74.     printf("ERROR_WORD=%#llx\n", istate->error_word);
  75.     printf("%%rcs=%#llx, flags=%#llx, %%cr0=%#llx\n", istate->cs, istate->rflags, read_cr0());
  76.     printf("%%rax=%#llx, %%rcx=%#llx, %%rdx=%#llx\n", istate->rax, istate->rcx, istate->rdx);
  77.     printf("%%rsi=%#llx, %%rdi=%#llx, %%r8 =%#llx\n", istate->rsi, istate->rdi, istate->r8);
  78.     printf("%%r9 =%#llx, %%r10 =%#llx, %%r11=%#llx\n", istate->r9, istate->r10, istate->r11);
  79. #ifdef CONFIG_DEBUG_ALLREGS
  80.     printf("%%r12=%#llx, %%r13=%#llx, %%r14=%#llx\n", istate->r12, istate->r13, istate->r14);
  81.     printf("%%r15=%#llx, %%rbx=%#llx, %%rbp=%#llx\n", istate->r15, istate->rbx, &istate->rbp);
  82. #endif
  83.     printf("%%rsp=%#llx\n", &istate->stack[0]);
  84. }
  85.  
  86. static void trap_virtual_eoi(void)
  87. {
  88.     if (eoi_function)
  89.         eoi_function();
  90.     else
  91.         panic("no eoi_function\n");
  92.  
  93. }
  94.  
  95. static void null_interrupt(int n, istate_t *istate)
  96. {
  97.     fault_if_from_uspace(istate, "unserviced interrupt: %d", n);
  98.     decode_istate(n, istate);
  99.     panic("unserviced interrupt\n");
  100. }
  101.  
  102. /** General Protection Fault. */
  103. static void gp_fault(int n, istate_t *istate)
  104. {
  105.     if (TASK) {
  106.         count_t ver;
  107.  
  108.         spinlock_lock(&TASK->lock);
  109.         ver = TASK->arch.iomapver;
  110.         spinlock_unlock(&TASK->lock);
  111.  
  112.         if (CPU->arch.iomapver_copy != ver) {
  113.             /*
  114.              * This fault can be caused by an early access
  115.              * to I/O port because of an out-dated
  116.              * I/O Permission bitmap installed on CPU.
  117.              * Install the fresh copy and restart
  118.              * the instruction.
  119.              */
  120.             io_perm_bitmap_install();
  121.             return;
  122.         }
  123.         fault_if_from_uspace(istate, "general protection fault");
  124.     }
  125.  
  126.     decode_istate(n, istate);
  127.     panic("general protection fault\n");
  128. }
  129.  
  130. static void ss_fault(int n, istate_t *istate)
  131. {
  132.     fault_if_from_uspace(istate, "stack fault");
  133.     decode_istate(n, istate);
  134.     panic("stack fault\n");
  135. }
  136.  
  137. static void nm_fault(int n, istate_t *istate)
  138. {
  139. #ifdef CONFIG_FPU_LAZY    
  140.     scheduler_fpu_lazy_request();
  141. #else
  142.     fault_if_from_uspace(istate, "fpu fault");
  143.     panic("fpu fault");
  144. #endif
  145. }
  146.  
  147. static void tlb_shootdown_ipi(int n, istate_t *istate)
  148. {
  149.     trap_virtual_eoi();
  150.     tlb_shootdown_ipi_recv();
  151. }
  152.  
  153. /** Handler of IRQ exceptions */
  154. static void irq_interrupt(int n, istate_t *istate)
  155. {
  156.     ASSERT(n >= IVT_IRQBASE);
  157.    
  158.     int inum = n - IVT_IRQBASE;
  159.     bool ack = false;
  160.     ASSERT(inum < IRQ_COUNT);
  161.     ASSERT((inum != IRQ_PIC_SPUR) && (inum != IRQ_PIC1));
  162.    
  163.     irq_t *irq = irq_dispatch_and_lock(inum);
  164.     if (irq) {
  165.         /*
  166.          * The IRQ handler was found.
  167.          */
  168.          
  169.         if (irq->preack) {
  170.             /* Send EOI before processing the interrupt */
  171.             trap_virtual_eoi();
  172.             ack = true;
  173.         }
  174.         irq->handler(irq, irq->arg);
  175.         spinlock_unlock(&irq->lock);
  176.     } else {
  177.         /*
  178.          * Spurious interrupt.
  179.          */
  180. #ifdef CONFIG_DEBUG
  181.         printf("cpu%d: spurious interrupt (inum=%d)\n", CPU->id, inum);
  182. #endif
  183.     }
  184.    
  185.     if (!ack)
  186.         trap_virtual_eoi();
  187. }
  188.  
  189. void interrupt_init(void)
  190. {
  191.     int i;
  192.    
  193.     for (i = 0; i < IVT_ITEMS; i++)
  194.         exc_register(i, "null", (iroutine) null_interrupt);
  195.    
  196.     for (i = 0; i < IRQ_COUNT; i++) {
  197.         if ((i != IRQ_PIC_SPUR) && (i != IRQ_PIC1))
  198.             exc_register(IVT_IRQBASE + i, "irq", (iroutine) irq_interrupt);
  199.     }
  200.    
  201.     exc_register(7, "nm_fault", (iroutine) nm_fault);
  202.     exc_register(12, "ss_fault", (iroutine) ss_fault);
  203.     exc_register(13, "gp_fault", (iroutine) gp_fault);
  204.     exc_register(14, "ident_mapper", (iroutine) ident_page_fault);
  205.    
  206. #ifdef CONFIG_SMP
  207.     exc_register(VECTOR_TLB_SHOOTDOWN_IPI, "tlb_shootdown", (iroutine) tlb_shootdown_ipi);
  208. #endif
  209. }
  210.  
  211. void trap_virtual_enable_irqs(uint16_t irqmask)
  212. {
  213.     if (enable_irqs_function)
  214.         enable_irqs_function(irqmask);
  215.     else
  216.         panic("no enable_irqs_function\n");
  217. }
  218.  
  219. void trap_virtual_disable_irqs(uint16_t irqmask)
  220. {
  221.     if (disable_irqs_function)
  222.         disable_irqs_function(irqmask);
  223.     else
  224.         panic("no disable_irqs_function\n");
  225. }
  226.  
  227. /** @}
  228.  */
  229.