Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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FreeBSD/Linux Kernel Cross Reference
sys/osfmk/ppc/interrupt.c
Version:
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1 /* 2 * Copyright (c) 2000 Apple Computer, Inc. All rights reserved. 3 * 4 * @APPLE_LICENSE_HEADER_START@ 5 * 6 * Copyright (c) 1999-2003 Apple Computer, Inc. All Rights Reserved. 7 * 8 * This file contains Original Code and/or Modifications of Original Code 9 * as defined in and that are subject to the Apple Public Source License 10 * Version 2.0 (the 'License'). You may not use this file except in 11 * compliance with the License. Please obtain a copy of the License at 12 * http://www.opensource.apple.com/apsl/ and read it before using this 13 * file. 14 * 15 * The Original Code and all software distributed under the License are 16 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER 17 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, 18 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, 19 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. 20 * Please see the License for the specific language governing rights and 21 * limitations under the License. 22 * 23 * @APPLE_LICENSE_HEADER_END@ 24 */ 25 /* 26 * @OSF_COPYRIGHT@ 27 */ 28 /* 29 * @APPLE_FREE_COPYRIGHT@ 30 */ 31 #include <kern/misc_protos.h> 32 #include <kern/assert.h> 33 #include <kern/thread.h> 34 #include <kern/counters.h> 35 #include <ppc/misc_protos.h> 36 #include <ppc/trap.h> 37 #include <ppc/proc_reg.h> 38 #include <ppc/exception.h> 39 #include <ppc/savearea.h> 40 #include <pexpert/pexpert.h> 41 #include <sys/kdebug.h> 42 43 perfTrap perfIntHook = 0; /* Pointer to performance trap hook routine */ 44 45 struct savearea * interrupt( 46 int type, 47 struct savearea *ssp, 48 unsigned int dsisr, 49 unsigned int dar) 50 { 51 int current_cpu, tmpr, targtemp; 52 unsigned int throttle; 53 uint64_t now; 54 thread_act_t act; 55 56 disable_preemption(); 57 58 if(perfIntHook) { /* Is there a hook? */ 59 if(perfIntHook(type, ssp, dsisr, dar) == KERN_SUCCESS) return ssp; /* If it succeeds, we are done... */ 60 } 61 62 #if 0 63 { 64 extern void fctx_text(void); 65 fctx_test(); 66 } 67 #endif 68 69 70 current_cpu = cpu_number(); 71 72 switch (type) { 73 74 case T_THERMAL: /* Fix the air conditioning, I'm dripping with sweat, or freezing, whatever... */ 75 76 /* 77 * Note that this code is just a hackification until we have a real thermal plan. 78 */ 79 80 tmpr = ml_read_temp(); /* Find out just how hot it is */ 81 targtemp = (dar >> 23) & 0x7F; /* Get the temprature we were looking for */ 82 if(dar & 4) { /* Did the temprature drop down? */ 83 #if 1 84 kprintf("THERMAL below (cpu %d) target = %d; actual = %d; thrm = %08X\n", current_cpu, targtemp, tmpr, dar); 85 #endif 86 #if 0 87 throttle = ml_throttle(0); /* Set throttle off */ 88 #if 1 89 kprintf("THERMAL (cpu %d) throttle set off; last = %d\n", current_cpu, throttle); 90 #endif 91 #endif 92 ml_thrm_set(0, per_proc_info[current_cpu].thrm.throttleTemp); /* Set no low temp and max allowable as max */ 93 94 #if 1 95 kprintf("THERMAL (cpu %d) temp set to: off min, %d max\n", current_cpu, per_proc_info[current_cpu].thrm.throttleTemp); 96 #endif 97 } 98 else { 99 #if 1 100 kprintf("THERMAL above (cpu %d) target = %d; actual = %d; thrm = %08X\n", current_cpu, targtemp, tmpr, dar); 101 #endif 102 #if 0 103 throttle = ml_throttle(32); /* Set throttle on about 1/8th */ 104 #if 1 105 kprintf("THERMAL (cpu %d) throttle set to 32; last = %d\n", current_cpu, throttle); 106 #endif 107 #endif 108 ml_thrm_set(per_proc_info[current_cpu].thrm.throttleTemp - 4, 0); /* Set low temp to max - 4 and max off */ 109 #if 1 110 kprintf("THERMAL (cpu %d) temp set to: %d min, off max\n", current_cpu, per_proc_info[current_cpu].thrm.throttleTemp - 4); 111 #endif 112 113 } 114 break; 115 116 case T_DECREMENTER: 117 KERNEL_DEBUG_CONSTANT(MACHDBG_CODE(DBG_MACH_EXCP_DECI, 0) | DBG_FUNC_NONE, 118 isync_mfdec(), (unsigned int)ssp->save_srr0, 0, 0, 0); 119 120 #if 0 121 if (pcsample_enable) { 122 if (find_user_regs(current_act())) 123 add_pcsamples (user_pc(current_act())); 124 } 125 #endif 126 127 act = current_act(); /* Find ourselves */ 128 if(act->mact.qactTimer != 0) { /* Is the timer set? */ 129 clock_get_uptime(&now); /* Find out what time it is */ 130 if (act->mact.qactTimer <= now) { /* It is set, has it popped? */ 131 act->mact.qactTimer = 0; /* Clear single shot timer */ 132 if((unsigned int)act->mact.vmmControl & 0xFFFFFFFE) { /* Are there any virtual machines? */ 133 vmm_timer_pop(act); /* Yes, check out them out... */ 134 } 135 } 136 } 137 138 rtclock_intr(0, ssp, 0); 139 break; 140 141 case T_INTERRUPT: 142 /* Call the platform interrupt routine */ 143 counter_always(c_incoming_interrupts++); 144 145 KERNEL_DEBUG_CONSTANT(MACHDBG_CODE(DBG_MACH_EXCP_INTR, 0) | DBG_FUNC_START, 146 current_cpu, (unsigned int)ssp->save_srr0, 0, 0, 0); 147 148 per_proc_info[current_cpu].interrupt_handler( 149 per_proc_info[current_cpu].interrupt_target, 150 per_proc_info[current_cpu].interrupt_refCon, 151 per_proc_info[current_cpu].interrupt_nub, 152 per_proc_info[current_cpu].interrupt_source); 153 154 KERNEL_DEBUG_CONSTANT(MACHDBG_CODE(DBG_MACH_EXCP_INTR, 0) | DBG_FUNC_END, 155 0, 0, 0, 0, 0); 156 157 break; 158 159 case T_SIGP: 160 /* Did the other processor signal us? */ 161 cpu_signal_handler(); 162 break; 163 164 case T_SHUTDOWN: 165 cpu_doshutdown(); 166 panic("returning from cpu_doshutdown()\n"); 167 break; 168 169 170 default: 171 #if MACH_KDP || MACH_KDB 172 (void)Call_Debugger(type, ssp); 173 #else 174 panic("Invalid interrupt type %x\n", type); 175 #endif 176 break; 177 } 178 179 enable_preemption(); 180 return ssp; 181 }
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