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 <kern/etimer.h>
  33 #include <kern/pms.h>
  34 #include <ppc/misc_protos.h>
  35 #include <ppc/trap.h>
  36 #include <ppc/proc_reg.h>
  37 #include <ppc/exception.h>
  38 #include <ppc/savearea.h>
  39 #include <pexpert/pexpert.h>
  40 #include <sys/kdebug.h>
  41
  42 perfCallback perfIntHook = 0;                                           /* Pointer to CHUD trap hook routine */
  43
  44 void unresolved_kernel_trap(int trapno,
  45                                    struct savearea *ssp,
  46                                    unsigned int dsisr,
  47                                    addr64_t dar,
  48                                    const char *message);
  49
  50 struct savearea * interrupt(
  51         int type,
  52         struct savearea *ssp,
  53         unsigned int dsisr,
  54         unsigned int dar)
  55 {
  56         int     current_cpu;
  57         struct per_proc_info    *proc_info;
  58         uint64_t                now;
  59         thread_t                thread;
  60
  61         disable_preemption();
  62
  63         if(perfIntHook) {                                                       /* Is there a hook? */
  64                 if(perfIntHook(type, ssp, dsisr, dar) == KERN_SUCCESS) return ssp;      /* If it succeeds, we are done... */
  65         }
  66
  67 #if 0
  68         {
  69                 extern void fctx_text(void);
  70                 fctx_test();
  71         }
  72 #endif
  73
  74
  75         current_cpu = cpu_number();
  76         proc_info = getPerProc();
  77
  78         switch (type) {
  79
  80                 case T_DECREMENTER:
  81                         KERNEL_DEBUG_CONSTANT(MACHDBG_CODE(DBG_MACH_EXCP_DECI, 0) | DBG_FUNC_NONE,
  82                                   isync_mfdec(), (unsigned int)ssp->save_srr0, 0, 0, 0);
  83
  84 #if 0
  85                         if (pcsample_enable) {
  86                                 if (find_user_regs(current_thread()))
  87                                   add_pcsamples (user_pc(current_thread()));
  88                         }
  89 #endif
  90
  91                         now = mach_absolute_time();                             /* Find out what time it is */
  92
  93                         if(now >= proc_info->pms.pmsPop) {              /* Is it time for power management state change? */
  94                                 pmsStep(1);                                                     /* Yes, advance step */
  95                                 now = mach_absolute_time();                     /* Get the time again since we ran a bit */
  96                         }
  97
  98                         thread = current_thread();                                      /* Find ourselves */
  99                         if(thread->machine.qactTimer != 0) {    /* Is the timer set? */
 100                                 if (thread->machine.qactTimer <= now) { /* It is set, has it popped? */
 101                                         thread->machine.qactTimer = 0;          /* Clear single shot timer */
 102                                         if((unsigned int)thread->machine.vmmControl & 0xFFFFFFFE) {     /* Are there any virtual machines? */
 103                                                 vmm_timer_pop(thread);                  /* Yes, check out them out... */
 104                                         }
 105                                 }
 106                         }
 107
 108                         etimer_intr(USER_MODE(ssp->save_srr1), ssp->save_srr0); /* Handle event timer */
 109                         break;
 110
 111                 case T_INTERRUPT:
 112                         /* Call the platform interrupt routine */
 113                         counter_always(c_incoming_interrupts++);
 114
 115                         KERNEL_DEBUG_CONSTANT(MACHDBG_CODE(DBG_MACH_EXCP_INTR, 0) | DBG_FUNC_START,
 116                            current_cpu, (unsigned int)ssp->save_srr0, 0, 0, 0);
 117
 118                         proc_info->interrupt_handler(
 119                                 proc_info->interrupt_target,
 120                                 proc_info->interrupt_refCon,
 121                                 proc_info->interrupt_nub,
 122                                 proc_info->interrupt_source);
 123
 124                         KERNEL_DEBUG_CONSTANT(MACHDBG_CODE(DBG_MACH_EXCP_INTR, 0) | DBG_FUNC_END,
 125                            0, 0, 0, 0, 0);
 126
 127                         break;
 128
 129                 case T_SIGP:
 130                         /* Did the other processor signal us? */
 131                         cpu_signal_handler();
 132                         break;
 133
 134                 case T_SHUTDOWN:
 135                         cpu_doshutdown();
 136                         panic("returning from cpu_doshutdown()\n");
 137                         break;
 138
 139
 140                 default:
 141                         if (!Call_Debugger(type, ssp))
 142                                 unresolved_kernel_trap(type, ssp, dsisr, dar, NULL);
 143                         break;
 144         }
 145
 146         enable_preemption();
 147         return ssp;
 148 }