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 <ppc/misc_protos.h>
  41 #include <ppc/trap.h>
  42 #include <ppc/proc_reg.h>
  43 #include <ppc/exception.h>
  44 #include <ppc/savearea.h>
  45 #include <pexpert/pexpert.h>
  46 #include <sys/kdebug.h>
  47
  48 perfCallback perfIntHook = 0;                                           /* Pointer to CHUD trap hook routine */
  49
  50 void unresolved_kernel_trap(int trapno,
  51                                    struct savearea *ssp,
  52                                    unsigned int dsisr,
  53                                    addr64_t dar,
  54                                    const char *message);
  55
  56 struct savearea * interrupt(
  57         int type,
  58         struct savearea *ssp,
  59         unsigned int dsisr,
  60         unsigned int dar)
  61 {
  62         int     current_cpu;
  63         struct per_proc_info    *proc_info;
  64         uint64_t                now;
  65         thread_t                thread;
  66
  67         disable_preemption();
  68
  69         if(perfIntHook) {                                                       /* Is there a hook? */
  70                 if(perfIntHook(type, ssp, dsisr, dar) == KERN_SUCCESS) return ssp;      /* If it succeeds, we are done... */
  71         }
  72
  73 #if 0
  74         {
  75                 extern void fctx_text(void);
  76                 fctx_test();
  77         }
  78 #endif
  79
  80
  81         current_cpu = cpu_number();
  82         proc_info = getPerProc();
  83
  84         switch (type) {
  85
  86                 case T_DECREMENTER:
  87                         KERNEL_DEBUG_CONSTANT(MACHDBG_CODE(DBG_MACH_EXCP_DECI, 0) | DBG_FUNC_NONE,
  88                                   isync_mfdec(), (unsigned int)ssp->save_srr0, 0, 0, 0);
  89
  90 #if 0
  91                         if (pcsample_enable) {
  92                                 if (find_user_regs(current_thread()))
  93                                   add_pcsamples (user_pc(current_thread()));
  94                         }
  95 #endif
  96
  97                         now = mach_absolute_time();                             /* Find out what time it is */
  98
  99                         if(now >= proc_info->pms.pmsPop) {              /* Is it time for power management state change? */
 100                                 pmsStep(1);                                                     /* Yes, advance step */
 101                                 now = mach_absolute_time();                     /* Get the time again since we ran a bit */
 102                         }
 103
 104                         thread = current_thread();                                      /* Find ourselves */
 105                         if(thread->machine.qactTimer != 0) {    /* Is the timer set? */
 106                                 if (thread->machine.qactTimer <= now) { /* It is set, has it popped? */
 107                                         thread->machine.qactTimer = 0;          /* Clear single shot timer */
 108                                         if((unsigned int)thread->machine.vmmControl & 0xFFFFFFFE) {     /* Are there any virtual machines? */
 109                                                 vmm_timer_pop(thread);                  /* Yes, check out them out... */
 110                                         }
 111                                 }
 112                         }
 113
 114                         rtclock_intr(ssp);
 115                         break;
 116
 117                 case T_INTERRUPT:
 118                         /* Call the platform interrupt routine */
 119                         counter_always(c_incoming_interrupts++);
 120
 121                         KERNEL_DEBUG_CONSTANT(MACHDBG_CODE(DBG_MACH_EXCP_INTR, 0) | DBG_FUNC_START,
 122                            current_cpu, (unsigned int)ssp->save_srr0, 0, 0, 0);
 123
 124                         proc_info->interrupt_handler(
 125                                 proc_info->interrupt_target,
 126                                 proc_info->interrupt_refCon,
 127                                 proc_info->interrupt_nub,
 128                                 proc_info->interrupt_source);
 129
 130                         KERNEL_DEBUG_CONSTANT(MACHDBG_CODE(DBG_MACH_EXCP_INTR, 0) | DBG_FUNC_END,
 131                            0, 0, 0, 0, 0);
 132
 133                         break;
 134
 135                 case T_SIGP:
 136                         /* Did the other processor signal us? */
 137                         cpu_signal_handler();
 138                         break;
 139
 140                 case T_SHUTDOWN:
 141                         cpu_doshutdown();
 142                         panic("returning from cpu_doshutdown()\n");
 143                         break;
 144
 145
 146                 default:
 147                         if (!Call_Debugger(type, ssp))
 148                                 unresolved_kernel_trap(type, ssp, dsisr, dar, NULL);
 149                         break;
 150         }
 151
 152         enable_preemption();
 153         return ssp;
 154 }