osfmk/ppc/interrupt.c

   1 /*
   2  * Copyright (c) 2000-2005 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_OSREFERENCE_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
  10  * License may not be used to create, or enable the creation or
  11  * redistribution of, unlawful or unlicensed copies of an Apple operating
  12  * system, or to circumvent, violate, or enable the circumvention or
  13  * violation of, any terms of an Apple operating system software license
  14  * agreement.
  15  *
  16  * Please obtain a copy of the License at
  17  * http://www.opensource.apple.com/apsl/ and read it before using this
  18  * file.
  19  *
  20  * The Original Code and all software distributed under the License are
  21  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  22  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  23  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  24  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  25  * Please see the License for the specific language governing rights and
  26  * limitations under the License.
  27  *
  28  * @APPLE_LICENSE_OSREFERENCE_HEADER_END@
  29  */
  30 /*
  31  * @OSF_COPYRIGHT@
  32  */
  33 /*
  34  * @APPLE_FREE_COPYRIGHT@
  35  */
  36 #include <kern/misc_protos.h>
  37 #include <kern/assert.h>
  38 #include <kern/thread.h>
  39 #include <kern/counters.h>
  40 #include <kern/etimer.h>
  41 #include <kern/pms.h>
  42 #include <ppc/misc_protos.h>
  43 #include <ppc/trap.h>
  44 #include <ppc/proc_reg.h>
  45 #include <ppc/exception.h>
  46 #include <ppc/savearea.h>
  47 #include <pexpert/pexpert.h>
  48 #include <sys/kdebug.h>
  49
  50 perfCallback perfIntHook = 0;                                           /* Pointer to CHUD trap hook routine */
  51
  52 void unresolved_kernel_trap(int trapno,
  53                                    struct savearea *ssp,
  54                                    unsigned int dsisr,
  55                                    addr64_t dar,
  56                                    const char *message);
  57
  58 struct savearea * interrupt(
  59         int type,
  60         struct savearea *ssp,
  61         unsigned int dsisr,
  62         unsigned int dar)
  63 {
  64         int     current_cpu;
  65         struct per_proc_info    *proc_info;
  66         uint64_t                now;
  67         thread_t                thread;
  68
  69         disable_preemption();
  70
  71         if(perfIntHook) {                                                       /* Is there a hook? */
  72                 if(perfIntHook(type, ssp, dsisr, dar) == KERN_SUCCESS) return ssp;      /* If it succeeds, we are done... */
  73         }
  74
  75 #if 0
  76         {
  77                 extern void fctx_text(void);
  78                 fctx_test();
  79         }
  80 #endif
  81
  82
  83         current_cpu = cpu_number();
  84         proc_info = getPerProc();
  85
  86         switch (type) {
  87
  88                 case T_DECREMENTER:
  89                         KERNEL_DEBUG_CONSTANT(MACHDBG_CODE(DBG_MACH_EXCP_DECI, 0) | DBG_FUNC_NONE,
  90                                   isync_mfdec(), (unsigned int)ssp->save_srr0, 0, 0, 0);
  91
  92 #if 0
  93                         if (pcsample_enable) {
  94                                 if (find_user_regs(current_thread()))
  95                                   add_pcsamples (user_pc(current_thread()));
  96                         }
  97 #endif
  98
  99                         now = mach_absolute_time();                             /* Find out what time it is */
 100
 101                         if(now >= proc_info->pms.pmsPop) {              /* Is it time for power management state change? */
 102                                 pmsStep(1);                                                     /* Yes, advance step */
 103                                 now = mach_absolute_time();                     /* Get the time again since we ran a bit */
 104                         }
 105
 106                         thread = current_thread();                                      /* Find ourselves */
 107                         if(thread->machine.qactTimer != 0) {    /* Is the timer set? */
 108                                 if (thread->machine.qactTimer <= now) { /* It is set, has it popped? */
 109                                         thread->machine.qactTimer = 0;          /* Clear single shot timer */
 110                                         if((unsigned int)thread->machine.vmmControl & 0xFFFFFFFE) {     /* Are there any virtual machines? */
 111                                                 vmm_timer_pop(thread);                  /* Yes, check out them out... */
 112                                         }
 113                                 }
 114                         }
 115
 116                         etimer_intr(USER_MODE(ssp->save_srr1), ssp->save_srr0); /* Handle event timer */
 117                         break;
 118
 119                 case T_INTERRUPT:
 120                         /* Call the platform interrupt routine */
 121                         counter_always(c_incoming_interrupts++);
 122
 123                         KERNEL_DEBUG_CONSTANT(MACHDBG_CODE(DBG_MACH_EXCP_INTR, 0) | DBG_FUNC_START,
 124                            current_cpu, (unsigned int)ssp->save_srr0, 0, 0, 0);
 125
 126                         proc_info->interrupt_handler(
 127                                 proc_info->interrupt_target,
 128                                 proc_info->interrupt_refCon,
 129                                 proc_info->interrupt_nub,
 130                                 proc_info->interrupt_source);
 131
 132                         KERNEL_DEBUG_CONSTANT(MACHDBG_CODE(DBG_MACH_EXCP_INTR, 0) | DBG_FUNC_END,
 133                            0, 0, 0, 0, 0);
 134
 135                         break;
 136
 137                 case T_SIGP:
 138                         /* Did the other processor signal us? */
 139                         cpu_signal_handler();
 140                         break;
 141
 142                 case T_SHUTDOWN:
 143                         cpu_doshutdown();
 144                         panic("returning from cpu_doshutdown()\n");
 145                         break;
 146
 147
 148                 default:
 149                         if (!Call_Debugger(type, ssp))
 150                                 unresolved_kernel_trap(type, ssp, dsisr, dar, NULL);
 151                         break;
 152         }
 153
 154         enable_preemption();
 155         return ssp;
 156 }