pexpert/i386/pe_interrupt.c

   1 /*
   2  * Copyright (c) 2000-2006 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License. The rights granted to you under the License
  10  * may not be used to create, or enable the creation or redistribution of,
  11  * unlawful or unlicensed copies of an Apple operating system, or to
  12  * circumvent, violate, or enable the circumvention or violation of, any
  13  * terms of an Apple operating system software license agreement.
  14  *
  15  * Please obtain a copy of the License at
  16  * http://www.opensource.apple.com/apsl/ and read it before using this file.
  17  *
  18  * The Original Code and all software distributed under the License are
  19  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  20  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  21  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  22  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  23  * Please see the License for the specific language governing rights and
  24  * limitations under the License.
  25  *
  26  * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  27  */
  28 #include <pexpert/pexpert.h>
  29 #include <pexpert/protos.h>
  30 #include <machine/machine_routines.h>
  31 #include <i386/lapic.h>
  32 #include <sys/kdebug.h>
  33
  34
  35 #if CONFIG_DTRACE && DEVELOPMENT
  36 #include <mach/sdt.h>
  37 #endif
  38
  39 void PE_incoming_interrupt(x86_saved_state_t *);
  40
  41
  42 struct i386_interrupt_handler {
  43         IOInterruptHandler      handler;
  44         void                    *nub;
  45         void                    *target;
  46         void                    *refCon;
  47 };
  48
  49 typedef struct i386_interrupt_handler i386_interrupt_handler_t;
  50
  51 i386_interrupt_handler_t        PE_interrupt_handler;
  52
  53
  54
  55 void
  56 PE_incoming_interrupt(x86_saved_state_t *state)
  57 {
  58         i386_interrupt_handler_t        *vector;
  59         uint64_t                        rip;
  60         int                             interrupt;
  61         boolean_t                       user_mode = FALSE;
  62
  63         if (is_saved_state64(state) == TRUE) {
  64                 x86_saved_state64_t     *state64;
  65
  66                 state64 = saved_state64(state);
  67                 rip = state64->isf.rip;
  68                 interrupt = state64->isf.trapno;
  69                 user_mode = TRUE;
  70         } else {
  71                 x86_saved_state32_t     *state32;
  72
  73                 state32 = saved_state32(state);
  74                 if (state32->cs & 0x03)
  75                         user_mode = TRUE;
  76                 rip = state32->eip;
  77                 interrupt = state32->trapno;
  78         }
  79
  80         KERNEL_DEBUG_CONSTANT(
  81                 MACHDBG_CODE(DBG_MACH_EXCP_INTR, 0) | DBG_FUNC_START,
  82                 interrupt, (unsigned int)rip, user_mode, 0, 0);
  83
  84         vector = &PE_interrupt_handler;
  85
  86 #if CONFIG_DTRACE && DEVELOPMENT
  87             DTRACE_INT5(interrupt_start, void *, vector->nub, int, 0,
  88                         void *, vector->target, IOInterruptHandler, vector->handler,
  89                         void *, vector->refCon);
  90 #endif
  91
  92         if (!lapic_interrupt(interrupt, state)) {
  93                 vector->handler(vector->target, NULL, vector->nub, interrupt);
  94         }
  95
  96 #if CONFIG_DTRACE && DEVELOPMENT
  97             DTRACE_INT5(interrupt_complete, void *, vector->nub, int, 0,
  98                         void *, vector->target, IOInterruptHandler, vector->handler,
  99                         void *, vector->refCon);
 100 #endif
 101
 102         KERNEL_DEBUG_CONSTANT(
 103                 MACHDBG_CODE(DBG_MACH_EXCP_INTR, 0) | DBG_FUNC_END,
 104            0, 0, 0, 0, 0);
 105 }
 106
 107 void PE_install_interrupt_handler(void *nub,
 108                                   __unused int source,
 109                                   void *target,
 110                                   IOInterruptHandler handler,
 111                                   void *refCon)
 112 {
 113         i386_interrupt_handler_t        *vector;
 114
 115         vector = &PE_interrupt_handler;
 116
 117         /*vector->source = source; IGNORED */
 118         vector->handler = handler;
 119         vector->nub = nub;
 120         vector->target = target;
 121         vector->refCon = refCon;
 122 }