osfmk/ppc/interrupt.c

   1 /*
   2  * Copyright (c) 2000-2005 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 /*
  23  * @OSF_COPYRIGHT@
  24  */
  25 /*
  26  * @APPLE_FREE_COPYRIGHT@
  27  */
  28 #include <kern/misc_protos.h>
  29 #include <kern/assert.h>
  30 #include <kern/thread.h>
  31 #include <kern/counters.h>
  32 #include <ppc/misc_protos.h>
  33 #include <ppc/trap.h>
  34 #include <ppc/proc_reg.h>
  35 #include <ppc/exception.h>
  36 #include <ppc/savearea.h>
  37 #include <pexpert/pexpert.h>
  38 #include <sys/kdebug.h>
  39
  40 perfCallback perfIntHook = 0;                                           /* Pointer to CHUD trap hook routine */
  41
  42 void unresolved_kernel_trap(int trapno,
  43                                    struct savearea *ssp,
  44                                    unsigned int dsisr,
  45                                    addr64_t dar,
  46                                    const char *message);
  47
  48 struct savearea * interrupt(
  49         int type,
  50         struct savearea *ssp,
  51         unsigned int dsisr,
  52         unsigned int dar)
  53 {
  54         int     current_cpu;
  55         struct per_proc_info    *proc_info;
  56         uint64_t                now;
  57         thread_t                thread;
  58
  59         disable_preemption();
  60
  61         if(perfIntHook) {                                                       /* Is there a hook? */
  62                 if(perfIntHook(type, ssp, dsisr, dar) == KERN_SUCCESS) return ssp;      /* If it succeeds, we are done... */
  63         }
  64
  65 #if 0
  66         {
  67                 extern void fctx_text(void);
  68                 fctx_test();
  69         }
  70 #endif
  71
  72
  73         current_cpu = cpu_number();
  74         proc_info = getPerProc();
  75
  76         switch (type) {
  77
  78                 case T_DECREMENTER:
  79                         KERNEL_DEBUG_CONSTANT(MACHDBG_CODE(DBG_MACH_EXCP_DECI, 0) | DBG_FUNC_NONE,
  80                                   isync_mfdec(), (unsigned int)ssp->save_srr0, 0, 0, 0);
  81
  82 #if 0
  83                         if (pcsample_enable) {
  84                                 if (find_user_regs(current_thread()))
  85                                   add_pcsamples (user_pc(current_thread()));
  86                         }
  87 #endif
  88
  89                         now = mach_absolute_time();                             /* Find out what time it is */
  90
  91                         if(now >= proc_info->pms.pmsPop) {              /* Is it time for power management state change? */
  92                                 pmsStep(1);                                                     /* Yes, advance step */
  93                                 now = mach_absolute_time();                     /* Get the time again since we ran a bit */
  94                         }
  95
  96                         thread = current_thread();                                      /* Find ourselves */
  97                         if(thread->machine.qactTimer != 0) {    /* Is the timer set? */
  98                                 if (thread->machine.qactTimer <= now) { /* It is set, has it popped? */
  99                                         thread->machine.qactTimer = 0;          /* Clear single shot timer */
 100                                         if((unsigned int)thread->machine.vmmControl & 0xFFFFFFFE) {     /* Are there any virtual machines? */
 101                                                 vmm_timer_pop(thread);                  /* Yes, check out them out... */
 102                                         }
 103                                 }
 104                         }
 105
 106                         rtclock_intr(ssp);
 107                         break;
 108
 109                 case T_INTERRUPT:
 110                         /* Call the platform interrupt routine */
 111                         counter_always(c_incoming_interrupts++);
 112
 113                         KERNEL_DEBUG_CONSTANT(MACHDBG_CODE(DBG_MACH_EXCP_INTR, 0) | DBG_FUNC_START,
 114                            current_cpu, (unsigned int)ssp->save_srr0, 0, 0, 0);
 115
 116                         proc_info->interrupt_handler(
 117                                 proc_info->interrupt_target,
 118                                 proc_info->interrupt_refCon,
 119                                 proc_info->interrupt_nub,
 120                                 proc_info->interrupt_source);
 121
 122                         KERNEL_DEBUG_CONSTANT(MACHDBG_CODE(DBG_MACH_EXCP_INTR, 0) | DBG_FUNC_END,
 123                            0, 0, 0, 0, 0);
 124
 125                         break;
 126
 127                 case T_SIGP:
 128                         /* Did the other processor signal us? */
 129                         cpu_signal_handler();
 130                         break;
 131
 132                 case T_SHUTDOWN:
 133                         cpu_doshutdown();
 134                         panic("returning from cpu_doshutdown()\n");
 135                         break;
 136
 137
 138                 default:
 139                         if (!Call_Debugger(type, ssp))
 140                                 unresolved_kernel_trap(type, ssp, dsisr, dar, NULL);
 141                         break;
 142         }
 143
 144         enable_preemption();
 145         return ssp;
 146 }