pexpert/i386/pe_interrupt.c

   1 /*
   2  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * The contents of this file constitute Original Code as defined in and
   7  * are subject to the Apple Public Source License Version 1.1 (the
   8  * "License").  You may not use this file except in compliance with the
   9  * License.  Please obtain a copy of the License at
  10  * http://www.apple.com/publicsource and read it before using this file.
  11  *
  12  * This Original Code and all software distributed under the License are
  13  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  14  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  15  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
  17  * License for the specific language governing rights and limitations
  18  * under the License.
  19  *
  20  * @APPLE_LICENSE_HEADER_END@
  21  */
  22 #include <pexpert/pexpert.h>
  23 #include <pexpert/protos.h>
  24 #include <machine/machine_routines.h>
  25 #include <i386/mp.h>
  26 #include <sys/kdebug.h>
  27
  28
  29 void PE_incoming_interrupt(x86_saved_state_t *);
  30
  31
  32 struct i386_interrupt_handler {
  33         IOInterruptHandler      handler;
  34         void                    *nub;
  35         void                    *target;
  36         void                    *refCon;
  37 };
  38
  39 typedef struct i386_interrupt_handler i386_interrupt_handler_t;
  40
  41 i386_interrupt_handler_t        PE_interrupt_handler;
  42
  43
  44
  45 void
  46 PE_incoming_interrupt(x86_saved_state_t *state)
  47 {
  48         i386_interrupt_handler_t        *vector;
  49         uint64_t                        rip;
  50         int                             interrupt;
  51         boolean_t                       user_mode = FALSE;
  52
  53         if (is_saved_state64(state) == TRUE) {
  54                 x86_saved_state64_t     *state64;
  55
  56                 state64 = saved_state64(state);
  57                 rip = state64->isf.rip;
  58                 interrupt = state64->isf.trapno;
  59                 user_mode = TRUE;
  60         } else {
  61                 x86_saved_state32_t     *state32;
  62
  63                 state32 = saved_state32(state);
  64                 if (state32->cs & 0x03)
  65                         user_mode = TRUE;
  66                 rip = state32->eip;
  67                 interrupt = state32->trapno;
  68         }
  69
  70         KERNEL_DEBUG_CONSTANT(
  71                 MACHDBG_CODE(DBG_MACH_EXCP_INTR, 0) | DBG_FUNC_START,
  72                 interrupt, (unsigned int)rip, user_mode, 0, 0);
  73
  74         vector = &PE_interrupt_handler;
  75
  76         if (!lapic_interrupt(interrupt, state)) {
  77                 vector->handler(vector->target, NULL, vector->nub, interrupt);
  78         }
  79
  80         KERNEL_DEBUG_CONSTANT(
  81                 MACHDBG_CODE(DBG_MACH_EXCP_INTR, 0) | DBG_FUNC_END,
  82                 0, 0, 0, 0, 0);
  83 }
  84
  85 void PE_install_interrupt_handler(void *nub,
  86                                   __unused int source,
  87                                   void *target,
  88                                   IOInterruptHandler handler,
  89                                   void *refCon)
  90 {
  91         i386_interrupt_handler_t        *vector;
  92
  93         vector = &PE_interrupt_handler;
  94
  95         /*vector->source = source; IGNORED */
  96         vector->handler = handler;
  97         vector->nub = nub;
  98         vector->target = target;
  99         vector->refCon = refCon;
 100 }