interrupts.hh revision 3521
1/* 2 * Copyright (c) 2006 The Regents of The University of Michigan 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions are 7 * met: redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer; 9 * redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution; 12 * neither the name of the copyright holders nor the names of its 13 * contributors may be used to endorse or promote products derived from 14 * this software without specific prior written permission. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 17 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 18 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 19 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 20 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 21 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 22 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 * 28 * Authors: Steve Reinhardt 29 * Kevin Lim 30 */ 31 32#ifndef __ARCH_ALPHA_INTERRUPT_HH__ 33#define __ARCH_ALPHA_INTERRUPT_HH__ 34 35#include "arch/alpha/faults.hh" 36#include "arch/alpha/isa_traits.hh" 37#include "cpu/thread_context.hh" 38 39namespace AlphaISA 40{ 41 class Interrupts 42 { 43 protected: 44 uint64_t interrupts[NumInterruptLevels]; 45 uint64_t intstatus; 46 47 public: 48 Interrupts() 49 { 50 memset(interrupts, 0, sizeof(interrupts)); 51 intstatus = 0; 52 } 53 54 void post(int int_num, int index) 55 { 56 DPRINTF(Interrupt, "Interrupt %d:%d posted\n", int_num, index); 57 58 if (int_num < 0 || int_num >= NumInterruptLevels) 59 panic("int_num out of bounds\n"); 60 61 if (index < 0 || index >= sizeof(uint64_t) * 8) 62 panic("int_num out of bounds\n"); 63 64 interrupts[int_num] |= 1 << index; 65 intstatus |= (ULL(1) << int_num); 66 } 67 68 void clear(int int_num, int index) 69 { 70 DPRINTF(Interrupt, "Interrupt %d:%d cleared\n", int_num, index); 71 72 if (int_num < 0 || int_num >= TheISA::NumInterruptLevels) 73 panic("int_num out of bounds\n"); 74 75 if (index < 0 || index >= sizeof(uint64_t) * 8) 76 panic("int_num out of bounds\n"); 77 78 interrupts[int_num] &= ~(1 << index); 79 if (interrupts[int_num] == 0) 80 intstatus &= ~(ULL(1) << int_num); 81 } 82 83 void clear_all() 84 { 85 DPRINTF(Interrupt, "Interrupts all cleared\n"); 86 87 memset(interrupts, 0, sizeof(interrupts)); 88 intstatus = 0; 89 } 90 91 void serialize(std::ostream &os) 92 { 93 SERIALIZE_ARRAY(interrupts, NumInterruptLevels); 94 SERIALIZE_SCALAR(intstatus); 95 } 96 97 void unserialize(Checkpoint *cp, const std::string §ion) 98 { 99 UNSERIALIZE_ARRAY(interrupts, NumInterruptLevels); 100 UNSERIALIZE_SCALAR(intstatus); 101 } 102 103 bool check_interrupts(ThreadContext * tc) const 104 { 105 return (intstatus != 0) && !(tc->readPC() & 0x3); 106 } 107 108 Fault getInterrupt(ThreadContext * tc) 109 { 110 int ipl = 0; 111 int summary = 0; 112 113 if (tc->readMiscReg(IPR_ASTRR)) 114 panic("asynchronous traps not implemented\n"); 115 116 if (tc->readMiscReg(IPR_SIRR)) { 117 for (int i = INTLEVEL_SOFTWARE_MIN; 118 i < INTLEVEL_SOFTWARE_MAX; i++) { 119 if (tc->readMiscReg(IPR_SIRR) & (ULL(1) << i)) { 120 // See table 4-19 of 21164 hardware reference 121 ipl = (i - INTLEVEL_SOFTWARE_MIN) + 1; 122 summary |= (ULL(1) << i); 123 } 124 } 125 } 126 127 uint64_t interrupts = intstatus; 128 if (interrupts) { 129 for (int i = INTLEVEL_EXTERNAL_MIN; 130 i < INTLEVEL_EXTERNAL_MAX; i++) { 131 if (interrupts & (ULL(1) << i)) { 132 // See table 4-19 of 21164 hardware reference 133 ipl = i; 134 summary |= (ULL(1) << i); 135 } 136 } 137 } 138 139 if (ipl && ipl > tc->readMiscReg(IPR_IPLR)) { 140 tc->setMiscReg(IPR_ISR, summary); 141 tc->setMiscReg(IPR_INTID, ipl); 142 143 /* The following needs to be added back in somehow */ 144 // Checker needs to know these two registers were updated. 145/*#if USE_CHECKER 146 if (this->checker) { 147 this->checker->threadBase()->setMiscReg(IPR_ISR, summary); 148 this->checker->threadBase()->setMiscReg(IPR_INTID, ipl); 149 } 150#endif*/ 151 152 DPRINTF(Flow, "Interrupt! IPLR=%d ipl=%d summary=%x\n", 153 tc->readMiscReg(IPR_IPLR), ipl, summary); 154 155 return new InterruptFault; 156 } else { 157 return NoFault; 158 } 159 } 160 161 private: 162 }; 163} 164 165#endif 166 167