osfmk/ppc/interrupt.c

   1 /*
   2  * Copyright (c) 2000-2007 Apple Inc. All rights reserved.
   3  *
   4  * @APPLE_OSREFERENCE_LICENSE_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 License
  10  * may not be used to create, or enable the creation or redistribution of,
  11  * unlawful or unlicensed copies of an Apple operating system, or to
  12  * circumvent, violate, or enable the circumvention or violation of, any
  13  * terms of an Apple operating system software license agreement.
  14  *
  15  * Please obtain a copy of the License at
  16  * http://www.opensource.apple.com/apsl/ and read it before using this file.
  17  *
  18  * The Original Code and all software distributed under the License are
  19  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  20  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  21  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  22  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  23  * Please see the License for the specific language governing rights and
  24  * limitations under the License.
  25  *
  26  * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  27  */
  28 /*
  29  * @OSF_COPYRIGHT@
  30  */
  31 /*
  32  * @APPLE_FREE_COPYRIGHT@
  33  */
  34
  35 #include <kern/misc_protos.h>
  36 #include <kern/assert.h>
  37 #include <kern/thread.h>
  38 #include <kern/counters.h>
  39 #include <kern/etimer.h>
  40 #include <kern/pms.h>
  41 #include <ppc/misc_protos.h>
  42 #include <ppc/trap.h>
  43 #include <ppc/proc_reg.h>
  44 #include <ppc/exception.h>
  45 #include <ppc/savearea.h>
  46 #include <ppc/vmachmon.h>
  47 #include <ppc/machine_cpu.h>
  48 #include <pexpert/pexpert.h>
  49 #include <sys/kdebug.h>
  50
  51 perfCallback perfIntHook;                                               /* Pointer to CHUD trap hook routine */
  52
  53 #if CONFIG_DTRACE
  54 #if (DEVELOPMENT || DEBUG )
  55 #include <mach/sdt.h>
  56 #endif
  57
  58 extern vm_offset_t dtrace_get_cpu_int_stack_top(void);
  59
  60 vm_offset_t dtrace_get_cpu_int_stack_top(void)
  61 {
  62         return getPerProc()->intstack_top_ss;
  63 }
  64
  65 /* See <rdar://problem/4613924> */
  66 perfCallback tempDTraceIntHook; /* Pointer to DTrace fbt int handler */
  67 #endif
  68
  69 void unresolved_kernel_trap(int trapno,
  70                                    struct savearea *ssp,
  71                                    unsigned int dsisr,
  72                                    addr64_t dar,
  73                                    const char *message);
  74
  75 unsigned int isync_mfdec(void);
  76
  77 struct savearea * interrupt(
  78         int type,
  79         struct savearea *ssp,
  80         unsigned int dsisr,
  81         unsigned int dar)
  82 {
  83         int     current_cpu;
  84         struct per_proc_info    *proc_info;
  85         uint64_t                now;
  86         thread_t                thread;
  87
  88         disable_preemption();
  89
  90         if(perfIntHook) {                                                       /* Is there a hook? */
  91                 if(perfIntHook(type, ssp, dsisr, dar) == KERN_SUCCESS) return ssp;      /* If it succeeds, we are done... */
  92         }
  93
  94 #if CONFIG_DTRACE
  95         if(tempDTraceIntHook) {                                                 /* Is there a hook? */
  96                 if(tempDTraceIntHook(type, ssp, dsisr, dar) == KERN_SUCCESS) return ssp;        /* If it succeeds, we are done... */
  97         }
  98 #endif
  99
 100 #if 0
 101         {
 102                 extern void fctx_text(void);
 103                 fctx_test();
 104         }
 105 #endif
 106
 107
 108         current_cpu = cpu_number();
 109         proc_info = getPerProc();
 110
 111         switch (type) {
 112
 113                 case T_DECREMENTER:
 114                         KERNEL_DEBUG_CONSTANT(MACHDBG_CODE(DBG_MACH_EXCP_DECI, 0) | DBG_FUNC_NONE,
 115                                   isync_mfdec(), (unsigned int)ssp->save_srr0, 0, 0, 0);
 116
 117                         now = mach_absolute_time();                             /* Find out what time it is */
 118
 119                         if(now >= proc_info->pms.pmsPop) {              /* Is it time for power management state change? */
 120                                 pmsStep(1);                                                     /* Yes, advance step */
 121                                 now = mach_absolute_time();                     /* Get the time again since we ran a bit */
 122                         }
 123
 124                         thread = current_thread();                                      /* Find ourselves */
 125                         if(thread->machine.qactTimer != 0) {    /* Is the timer set? */
 126                                 if (thread->machine.qactTimer <= now) { /* It is set, has it popped? */
 127                                         thread->machine.qactTimer = 0;          /* Clear single shot timer */
 128                                         if((unsigned int)thread->machine.vmmControl & 0xFFFFFFFE) {     /* Are there any virtual machines? */
 129                                                 vmm_timer_pop(thread);                  /* Yes, check out them out... */
 130                                         }
 131                                 }
 132                         }
 133
 134                         etimer_intr(USER_MODE(ssp->save_srr1), ssp->save_srr0); /* Handle event timer */
 135                         break;
 136
 137                 case T_INTERRUPT:
 138                         /* Call the platform interrupt routine */
 139                         counter(c_incoming_interrupts++);
 140
 141                         KERNEL_DEBUG_CONSTANT(MACHDBG_CODE(DBG_MACH_EXCP_INTR, 0) | DBG_FUNC_START,
 142                            current_cpu, (unsigned int)ssp->save_srr0, 0, 0, 0);
 143
 144 #if CONFIG_DTRACE && (DEVELOPMENT || DEBUG )
 145                         DTRACE_INT5(interrupt__start, void *, proc_info->interrupt_nub, int, proc_info->interrupt_source,
 146                                                 void *, proc_info->interrupt_target, IOInterruptHandler, proc_info->interrupt_handler,
 147                                                 void *, proc_info->interrupt_refCon);
 148 #endif
 149
 150                         proc_info->interrupt_handler(
 151                                 proc_info->interrupt_target,
 152                                 proc_info->interrupt_refCon,
 153                                 proc_info->interrupt_nub,
 154                                 proc_info->interrupt_source);
 155
 156 #if CONFIG_DTRACE && (DEVELOPMENT || DEBUG )
 157                         DTRACE_INT5(interrupt__complete, void *, proc_info->interrupt_nub, int, proc_info->interrupt_source,
 158                                                 void *, proc_info->interrupt_target, IOInterruptHandler, proc_info->interrupt_handler,
 159                                                 void *, proc_info->interrupt_refCon);
 160 #endif
 161
 162                         KERNEL_DEBUG_CONSTANT(MACHDBG_CODE(DBG_MACH_EXCP_INTR, 0) | DBG_FUNC_END,
 163                            0, 0, 0, 0, 0);
 164
 165                         break;
 166
 167                 case T_SIGP:
 168                         /* Did the other processor signal us? */
 169                         cpu_signal_handler();
 170                         break;
 171
 172                 case T_SHUTDOWN:
 173                         cpu_doshutdown();
 174                         panic("returning from cpu_doshutdown()\n");
 175                         break;
 176
 177
 178                 default:
 179                         if (!Call_Debugger(type, ssp))
 180                                 unresolved_kernel_trap(type, ssp, dsisr, dar, NULL);
 181                         break;
 182         }
 183
 184         enable_preemption();
 185         return ssp;
 186 }