kernel/arch/ia32/include/interrupt.h

   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  */