interrupts.hh revision 8829:d21889bface6
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: Ali Saidi 29 * Lisa Hsu 30 */ 31 32#ifndef __ARCH_SPARC_INTERRUPT_HH__ 33#define __ARCH_SPARC_INTERRUPT_HH__ 34 35#include "arch/sparc/faults.hh" 36#include "arch/sparc/isa_traits.hh" 37#include "arch/sparc/registers.hh" 38#include "cpu/thread_context.hh" 39#include "debug/Interrupt.hh" 40#include "params/SparcInterrupts.hh" 41#include "sim/sim_object.hh" 42 43namespace SparcISA 44{ 45 46class Interrupts : public SimObject 47{ 48 private: 49 BaseCPU * cpu; 50 51 uint64_t interrupts[NumInterruptTypes]; 52 uint64_t intStatus; 53 54 public: 55 56 void 57 setCPU(BaseCPU * _cpu) 58 { 59 cpu = _cpu; 60 } 61 62 typedef SparcInterruptsParams Params; 63 64 const Params * 65 params() const 66 { 67 return dynamic_cast<const Params *>(_params); 68 } 69 70 Interrupts(Params * p) : SimObject(p), cpu(NULL) 71 { 72 clearAll(); 73 } 74 75 int 76 InterruptLevel(uint64_t softint) 77 { 78 if (softint & 0x10000 || softint & 0x1) 79 return 14; 80 81 int level = 15; 82 while (level > 0 && !(1 << level & softint)) 83 level--; 84 if (1 << level & softint) 85 return level; 86 return 0; 87 } 88 89 void 90 post(int int_num, int index) 91 { 92 DPRINTF(Interrupt, "Interrupt %d:%d posted\n", int_num, index); 93 assert(int_num >= 0 && int_num < NumInterruptTypes); 94 assert(index >= 0 && index < 64); 95 96 interrupts[int_num] |= ULL(1) << index; 97 intStatus |= ULL(1) << int_num; 98 } 99 100 void 101 clear(int int_num, int index) 102 { 103 DPRINTF(Interrupt, "Interrupt %d:%d cleared\n", int_num, index); 104 assert(int_num >= 0 && int_num < NumInterruptTypes); 105 assert(index >= 0 && index < 64); 106 107 interrupts[int_num] &= ~(ULL(1) << index); 108 if (!interrupts[int_num]) 109 intStatus &= ~(ULL(1) << int_num); 110 } 111 112 void 113 clearAll() 114 { 115 for (int i = 0; i < NumInterruptTypes; ++i) { 116 interrupts[i] = 0; 117 } 118 intStatus = 0; 119 } 120 121 bool 122 checkInterrupts(ThreadContext *tc) const 123 { 124 return intStatus; 125 } 126 127 Fault 128 getInterrupt(ThreadContext *tc) 129 { 130 HPSTATE hpstate = tc->readMiscRegNoEffect(MISCREG_HPSTATE); 131 PSTATE pstate = tc->readMiscRegNoEffect(MISCREG_PSTATE); 132 133 // THESE ARE IN ORDER OF PRIORITY 134 // since there are early returns, and the highest 135 // priority interrupts should get serviced, 136 // it is v. important that new interrupts are inserted 137 // in the right order of processing 138 if (hpstate.hpriv) { 139 if (pstate.ie) { 140 if (interrupts[IT_HINTP]) { 141 // This will be cleaned by a HINTP write 142 return new HstickMatch; 143 } 144 if (interrupts[IT_INT_VEC]) { 145 // this will be cleared by an ASI read (or write) 146 return new InterruptVector; 147 } 148 } 149 } else { 150 if (interrupts[IT_TRAP_LEVEL_ZERO]) { 151 // this is cleared by deasserting HPSTATE::tlz 152 return new TrapLevelZero; 153 } 154 // HStick matches always happen in priv mode (ie doesn't matter) 155 if (interrupts[IT_HINTP]) { 156 return new HstickMatch; 157 } 158 if (interrupts[IT_INT_VEC]) { 159 // this will be cleared by an ASI read (or write) 160 return new InterruptVector; 161 } 162 if (pstate.ie) { 163 if (interrupts[IT_CPU_MONDO]) { 164 return new CpuMondo; 165 } 166 if (interrupts[IT_DEV_MONDO]) { 167 return new DevMondo; 168 } 169 if (interrupts[IT_SOFT_INT]) { 170 int level = InterruptLevel(interrupts[IT_SOFT_INT]); 171 return new InterruptLevelN(level); 172 } 173 174 if (interrupts[IT_RES_ERROR]) { 175 return new ResumableError; 176 } 177 } // !hpriv && pstate.ie 178 } // !hpriv 179 return NoFault; 180 } 181 182 void 183 updateIntrInfo(ThreadContext *tc) 184 {} 185 186 uint64_t 187 get_vec(int int_num) 188 { 189 assert(int_num >= 0 && int_num < NumInterruptTypes); 190 return interrupts[int_num]; 191 } 192 193 void 194 serialize(std::ostream &os) 195 { 196 SERIALIZE_ARRAY(interrupts,NumInterruptTypes); 197 SERIALIZE_SCALAR(intStatus); 198 } 199 200 void 201 unserialize(Checkpoint *cp, const std::string §ion) 202 { 203 UNSERIALIZE_ARRAY(interrupts,NumInterruptTypes); 204 UNSERIALIZE_SCALAR(intStatus); 205 } 206}; 207} // namespace SPARC_ISA 208 209#endif // __ARCH_SPARC_INTERRUPT_HH__ 210