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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. #ifndef KERN_ia32_INTERRUPT_H_
  36. #define KERN_ia32_INTERRUPT_H_
  37.  
  38. #include <arch/types.h>
  39. #include <arch/pm.h>
  40.  
  41. #define IVT_ITEMS       IDT_ITEMS
  42. #define IVT_FIRST       0
  43.  
  44. #define EXC_COUNT   32
  45. #define IRQ_COUNT   16
  46.  
  47. #define IVT_EXCBASE     0
  48. #define IVT_IRQBASE     (IVT_EXCBASE + EXC_COUNT)
  49. #define IVT_FREEBASE    (IVT_IRQBASE + IRQ_COUNT)
  50.  
  51. #define IRQ_CLK         0
  52. #define IRQ_KBD         1
  53. #define IRQ_PIC1        2
  54. #define IRQ_PIC_SPUR    7
  55. #define IRQ_MOUSE       12
  56.  
  57. /* this one must have four least significant bits set to ones */
  58. #define VECTOR_APIC_SPUR    (IVT_ITEMS - 1)
  59.  
  60. #if (((VECTOR_APIC_SPUR + 1) % 16) || VECTOR_APIC_SPUR >= IVT_ITEMS)
  61. #error Wrong definition of VECTOR_APIC_SPUR
  62. #endif
  63.  
  64. #define VECTOR_DEBUG                1
  65. #define VECTOR_CLK                  (IVT_IRQBASE + IRQ_CLK)
  66. #define VECTOR_PIC_SPUR             (IVT_IRQBASE + IRQ_PIC_SPUR)
  67. #define VECTOR_SYSCALL              IVT_FREEBASE
  68. #define VECTOR_TLB_SHOOTDOWN_IPI    (IVT_FREEBASE + 1)
  69. #define VECTOR_DEBUG_IPI            (IVT_FREEBASE + 2)
  70.  
  71. struct istate {
  72.     uint32_t eax;
  73.     uint32_t ecx;
  74.     uint32_t edx;
  75.     uint32_t esi;
  76.     uint32_t edi;
  77.     uint32_t ebp;
  78.     uint32_t ebx;
  79.  
  80.     uint32_t gs;
  81.     uint32_t fs;
  82.     uint32_t es;
  83.     uint32_t ds;
  84.  
  85.     uint32_t error_word;
  86.     uint32_t eip;
  87.     uint32_t cs;
  88.     uint32_t eflags;
  89.     uint32_t stack[];
  90. };
  91.  
  92. /** Return true if exception happened while in userspace */
  93. static inline int istate_from_uspace(istate_t *istate)
  94. {
  95.     return !(istate->eip & 0x80000000);
  96. }
  97.  
  98. static inline void istate_set_retaddr(istate_t *istate, uintptr_t retaddr)
  99. {
  100.     istate->eip = retaddr;
  101. }
  102.  
  103. static inline unative_t istate_get_pc(istate_t *istate)
  104. {
  105.     return istate->eip;
  106. }
  107.  
  108. extern void (* disable_irqs_function)(uint16_t irqmask);
  109. extern void (* enable_irqs_function)(uint16_t irqmask);
  110. extern void (* eoi_function)(void);
  111.  
  112. extern void decode_istate(istate_t *istate);
  113. extern void interrupt_init(void);
  114. extern void trap_virtual_enable_irqs(uint16_t irqmask);
  115. extern void trap_virtual_disable_irqs(uint16_t irqmask);
  116.  
  117. #endif
  118.  
  119. /** @}
  120.  */
  121.