osfmk/ppc/interrupt.c

   1 /*
   2  * Copyright (c) 2000 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 perfTrap perfIntHook = 0;                                               /* Pointer to performance trap hook routine */
  41
  42 struct savearea * interrupt(
  43         int type,
  44         struct savearea *ssp,
  45         unsigned int dsisr,
  46         unsigned int dar)
  47 {
  48         int     current_cpu;
  49         uint64_t                now;
  50         thread_act_t    act;
  51
  52         disable_preemption();
  53
  54         if(perfIntHook) {                                                       /* Is there a hook? */
  55                 if(perfIntHook(type, ssp, dsisr, dar) == KERN_SUCCESS) return ssp;      /* If it succeeds, we are done... */
  56         }
  57
  58 #if 0
  59         {
  60                 extern void fctx_text(void);
  61                 fctx_test();
  62         }
  63 #endif
  64
  65
  66         current_cpu = cpu_number();
  67
  68         switch (type) {
  69
  70                 case T_DECREMENTER:
  71                         KERNEL_DEBUG_CONSTANT(MACHDBG_CODE(DBG_MACH_EXCP_DECI, 0) | DBG_FUNC_NONE,
  72                                   isync_mfdec(), (unsigned int)ssp->save_srr0, 0, 0, 0);
  73
  74 #if 0
  75                         if (pcsample_enable) {
  76                                 if (find_user_regs(current_act()))
  77                                   add_pcsamples (user_pc(current_act()));
  78                         }
  79 #endif
  80
  81                         act = current_act();                                    /* Find ourselves */
  82                         if(act->mact.qactTimer != 0) {  /* Is the timer set? */
  83                                 clock_get_uptime(&now);                         /* Find out what time it is */
  84                                 if (act->mact.qactTimer <= now) {       /* It is set, has it popped? */
  85                                         act->mact.qactTimer = 0;                /* Clear single shot timer */
  86                                         if((unsigned int)act->mact.vmmControl & 0xFFFFFFFE) {   /* Are there any virtual machines? */
  87                                                 vmm_timer_pop(act);                     /* Yes, check out them out... */
  88                                         }
  89                                 }
  90                         }
  91
  92                         rtclock_intr(0, ssp, 0);
  93                         break;
  94
  95                 case T_INTERRUPT:
  96                         /* Call the platform interrupt routine */
  97                         counter_always(c_incoming_interrupts++);
  98
  99                         KERNEL_DEBUG_CONSTANT(MACHDBG_CODE(DBG_MACH_EXCP_INTR, 0) | DBG_FUNC_START,
 100                            current_cpu, (unsigned int)ssp->save_srr0, 0, 0, 0);
 101
 102                         per_proc_info[current_cpu].interrupt_handler(
 103                                 per_proc_info[current_cpu].interrupt_target,
 104                                 per_proc_info[current_cpu].interrupt_refCon,
 105                                 per_proc_info[current_cpu].interrupt_nub,
 106                                 per_proc_info[current_cpu].interrupt_source);
 107
 108                         KERNEL_DEBUG_CONSTANT(MACHDBG_CODE(DBG_MACH_EXCP_INTR, 0) | DBG_FUNC_END,
 109                            0, 0, 0, 0, 0);
 110
 111                         break;
 112
 113                 case T_SIGP:
 114                         /* Did the other processor signal us? */
 115                         cpu_signal_handler();
 116                         break;
 117
 118                 case T_SHUTDOWN:
 119                         cpu_doshutdown();
 120                         panic("returning from cpu_doshutdown()\n");
 121                         break;
 122
 123
 124                 default:
 125         #if     MACH_KDP || MACH_KDB
 126                         (void)Call_Debugger(type, ssp);
 127         #else
 128                         panic("Invalid interrupt type %x\n", type);
 129         #endif
 130                         break;
 131         }
 132
 133         enable_preemption();
 134         return ssp;
 135 }