osfmk/ppc/interrupt.c

   1 /*
   2  * Copyright (c) 2000-2005 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 /*
  29  * @OSF_COPYRIGHT@
  30  */
  31 /*
  32  * @APPLE_FREE_COPYRIGHT@
  33  */
  34 #include <kern/misc_protos.h>
  35 #include <kern/assert.h>
  36 #include <kern/thread.h>
  37 #include <kern/counters.h>
  38 #include <ppc/misc_protos.h>
  39 #include <ppc/trap.h>
  40 #include <ppc/proc_reg.h>
  41 #include <ppc/exception.h>
  42 #include <ppc/savearea.h>
  43 #include <pexpert/pexpert.h>
  44 #include <sys/kdebug.h>
  45
  46 perfCallback perfIntHook = 0;                                           /* Pointer to CHUD trap hook routine */
  47
  48 void unresolved_kernel_trap(int trapno,
  49                                    struct savearea *ssp,
  50                                    unsigned int dsisr,
  51                                    addr64_t dar,
  52                                    const char *message);
  53
  54 struct savearea * interrupt(
  55         int type,
  56         struct savearea *ssp,
  57         unsigned int dsisr,
  58         unsigned int dar)
  59 {
  60         int     current_cpu;
  61         struct per_proc_info    *proc_info;
  62         uint64_t                now;
  63         thread_t                thread;
  64
  65         disable_preemption();
  66
  67         if(perfIntHook) {                                                       /* Is there a hook? */
  68                 if(perfIntHook(type, ssp, dsisr, dar) == KERN_SUCCESS) return ssp;      /* If it succeeds, we are done... */
  69         }
  70
  71 #if 0
  72         {
  73                 extern void fctx_text(void);
  74                 fctx_test();
  75         }
  76 #endif
  77
  78
  79         current_cpu = cpu_number();
  80         proc_info = getPerProc();
  81
  82         switch (type) {
  83
  84                 case T_DECREMENTER:
  85                         KERNEL_DEBUG_CONSTANT(MACHDBG_CODE(DBG_MACH_EXCP_DECI, 0) | DBG_FUNC_NONE,
  86                                   isync_mfdec(), (unsigned int)ssp->save_srr0, 0, 0, 0);
  87
  88 #if 0
  89                         if (pcsample_enable) {
  90                                 if (find_user_regs(current_thread()))
  91                                   add_pcsamples (user_pc(current_thread()));
  92                         }
  93 #endif
  94
  95                         now = mach_absolute_time();                             /* Find out what time it is */
  96
  97                         if(now >= proc_info->pms.pmsPop) {              /* Is it time for power management state change? */
  98                                 pmsStep(1);                                                     /* Yes, advance step */
  99                                 now = mach_absolute_time();                     /* Get the time again since we ran a bit */
 100                         }
 101
 102                         thread = current_thread();                                      /* Find ourselves */
 103                         if(thread->machine.qactTimer != 0) {    /* Is the timer set? */
 104                                 if (thread->machine.qactTimer <= now) { /* It is set, has it popped? */
 105                                         thread->machine.qactTimer = 0;          /* Clear single shot timer */
 106                                         if((unsigned int)thread->machine.vmmControl & 0xFFFFFFFE) {     /* Are there any virtual machines? */
 107                                                 vmm_timer_pop(thread);                  /* Yes, check out them out... */
 108                                         }
 109                                 }
 110                         }
 111
 112                         rtclock_intr(ssp);
 113                         break;
 114
 115                 case T_INTERRUPT:
 116                         /* Call the platform interrupt routine */
 117                         counter_always(c_incoming_interrupts++);
 118
 119                         KERNEL_DEBUG_CONSTANT(MACHDBG_CODE(DBG_MACH_EXCP_INTR, 0) | DBG_FUNC_START,
 120                            current_cpu, (unsigned int)ssp->save_srr0, 0, 0, 0);
 121
 122                         proc_info->interrupt_handler(
 123                                 proc_info->interrupt_target,
 124                                 proc_info->interrupt_refCon,
 125                                 proc_info->interrupt_nub,
 126                                 proc_info->interrupt_source);
 127
 128                         KERNEL_DEBUG_CONSTANT(MACHDBG_CODE(DBG_MACH_EXCP_INTR, 0) | DBG_FUNC_END,
 129                            0, 0, 0, 0, 0);
 130
 131                         break;
 132
 133                 case T_SIGP:
 134                         /* Did the other processor signal us? */
 135                         cpu_signal_handler();
 136                         break;
 137
 138                 case T_SHUTDOWN:
 139                         cpu_doshutdown();
 140                         panic("returning from cpu_doshutdown()\n");
 141                         break;
 142
 143
 144                 default:
 145                         if (!Call_Debugger(type, ssp))
 146                                 unresolved_kernel_trap(type, ssp, dsisr, dar, NULL);
 147                         break;
 148         }
 149
 150         enable_preemption();
 151         return ssp;
 152 }