| /* |
| * Copyright (c) 2006 The Regents of The University of Michigan |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions are |
| * met: redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer; |
| * redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution; |
| * neither the name of the copyright holders nor the names of its |
| * contributors may be used to endorse or promote products derived from |
| * this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| * |
| * Authors: Ali Saidi |
| * Lisa Hsu |
| */ |
| |
| #ifndef __ARCH_SPARC_INTERRUPT_HH__ |
| #define __ARCH_SPARC_INTERRUPT_HH__ |
| |
| #include "arch/sparc/faults.hh" |
| #include "arch/sparc/isa_traits.hh" |
| #include "arch/sparc/registers.hh" |
| #include "cpu/thread_context.hh" |
| #include "debug/Interrupt.hh" |
| #include "params/SparcInterrupts.hh" |
| #include "sim/sim_object.hh" |
| |
| namespace SparcISA |
| { |
| |
| enum InterruptTypes |
| { |
| IT_TRAP_LEVEL_ZERO, |
| IT_HINTP, |
| IT_INT_VEC, |
| IT_CPU_MONDO, |
| IT_DEV_MONDO, |
| IT_RES_ERROR, |
| IT_SOFT_INT, |
| NumInterruptTypes |
| }; |
| |
| class Interrupts : public SimObject |
| { |
| private: |
| BaseCPU * cpu; |
| |
| uint64_t interrupts[NumInterruptTypes]; |
| uint64_t intStatus; |
| |
| public: |
| |
| void |
| setCPU(BaseCPU * _cpu) |
| { |
| cpu = _cpu; |
| } |
| |
| typedef SparcInterruptsParams Params; |
| |
| const Params * |
| params() const |
| { |
| return dynamic_cast<const Params *>(_params); |
| } |
| |
| Interrupts(Params * p) : SimObject(p), cpu(NULL) |
| { |
| clearAll(); |
| } |
| |
| int |
| InterruptLevel(uint64_t softint) |
| { |
| if (softint & 0x10000 || softint & 0x1) |
| return 14; |
| |
| int level = 15; |
| while (level > 0 && !(1 << level & softint)) |
| level--; |
| if (1 << level & softint) |
| return level; |
| return 0; |
| } |
| |
| void |
| post(int int_num, int index) |
| { |
| DPRINTF(Interrupt, "Interrupt %d:%d posted\n", int_num, index); |
| assert(int_num >= 0 && int_num < NumInterruptTypes); |
| assert(index >= 0 && index < 64); |
| |
| interrupts[int_num] |= ULL(1) << index; |
| intStatus |= ULL(1) << int_num; |
| } |
| |
| void |
| clear(int int_num, int index) |
| { |
| DPRINTF(Interrupt, "Interrupt %d:%d cleared\n", int_num, index); |
| assert(int_num >= 0 && int_num < NumInterruptTypes); |
| assert(index >= 0 && index < 64); |
| |
| interrupts[int_num] &= ~(ULL(1) << index); |
| if (!interrupts[int_num]) |
| intStatus &= ~(ULL(1) << int_num); |
| } |
| |
| void |
| clearAll() |
| { |
| for (int i = 0; i < NumInterruptTypes; ++i) { |
| interrupts[i] = 0; |
| } |
| intStatus = 0; |
| } |
| |
| bool |
| checkInterrupts(ThreadContext *tc) const |
| { |
| if (!intStatus) |
| return false; |
| |
| HPSTATE hpstate = tc->readMiscRegNoEffect(MISCREG_HPSTATE); |
| PSTATE pstate = tc->readMiscRegNoEffect(MISCREG_PSTATE); |
| |
| // THESE ARE IN ORDER OF PRIORITY |
| // since there are early returns, and the highest |
| // priority interrupts should get serviced, |
| // it is v. important that new interrupts are inserted |
| // in the right order of processing |
| if (hpstate.hpriv) { |
| if (pstate.ie) { |
| if (interrupts[IT_HINTP]) { |
| // This will be cleaned by a HINTP write |
| return true; |
| } |
| if (interrupts[IT_INT_VEC]) { |
| // this will be cleared by an ASI read (or write) |
| return true; |
| } |
| } |
| } else { |
| if (interrupts[IT_TRAP_LEVEL_ZERO]) { |
| // this is cleared by deasserting HPSTATE::tlz |
| return true; |
| } |
| // HStick matches always happen in priv mode (ie doesn't matter) |
| if (interrupts[IT_HINTP]) { |
| return true; |
| } |
| if (interrupts[IT_INT_VEC]) { |
| // this will be cleared by an ASI read (or write) |
| return true; |
| } |
| if (pstate.ie) { |
| if (interrupts[IT_CPU_MONDO]) { |
| return true; |
| } |
| if (interrupts[IT_DEV_MONDO]) { |
| return true; |
| } |
| if (interrupts[IT_SOFT_INT]) { |
| return true; |
| } |
| |
| if (interrupts[IT_RES_ERROR]) { |
| return true; |
| } |
| } // !hpriv && pstate.ie |
| } // !hpriv |
| |
| return false; |
| } |
| |
| Fault |
| getInterrupt(ThreadContext *tc) |
| { |
| assert(checkInterrupts(tc)); |
| |
| HPSTATE hpstate = tc->readMiscRegNoEffect(MISCREG_HPSTATE); |
| PSTATE pstate = tc->readMiscRegNoEffect(MISCREG_PSTATE); |
| |
| // THESE ARE IN ORDER OF PRIORITY |
| // since there are early returns, and the highest |
| // priority interrupts should get serviced, |
| // it is v. important that new interrupts are inserted |
| // in the right order of processing |
| if (hpstate.hpriv) { |
| if (pstate.ie) { |
| if (interrupts[IT_HINTP]) { |
| // This will be cleaned by a HINTP write |
| return std::make_shared<HstickMatch>(); |
| } |
| if (interrupts[IT_INT_VEC]) { |
| // this will be cleared by an ASI read (or write) |
| return std::make_shared<InterruptVector>(); |
| } |
| } |
| } else { |
| if (interrupts[IT_TRAP_LEVEL_ZERO]) { |
| // this is cleared by deasserting HPSTATE::tlz |
| return std::make_shared<TrapLevelZero>(); |
| } |
| // HStick matches always happen in priv mode (ie doesn't matter) |
| if (interrupts[IT_HINTP]) { |
| return std::make_shared<HstickMatch>(); |
| } |
| if (interrupts[IT_INT_VEC]) { |
| // this will be cleared by an ASI read (or write) |
| return std::make_shared<InterruptVector>(); |
| } |
| if (pstate.ie) { |
| if (interrupts[IT_CPU_MONDO]) { |
| return std::make_shared<CpuMondo>(); |
| } |
| if (interrupts[IT_DEV_MONDO]) { |
| return std::make_shared<DevMondo>(); |
| } |
| if (interrupts[IT_SOFT_INT]) { |
| int level = InterruptLevel(interrupts[IT_SOFT_INT]); |
| return std::make_shared<InterruptLevelN>(level); |
| } |
| |
| if (interrupts[IT_RES_ERROR]) { |
| return std::make_shared<ResumableError>(); |
| } |
| } // !hpriv && pstate.ie |
| } // !hpriv |
| return NoFault; |
| } |
| |
| void |
| updateIntrInfo(ThreadContext *tc) |
| {} |
| |
| uint64_t |
| get_vec(int int_num) |
| { |
| assert(int_num >= 0 && int_num < NumInterruptTypes); |
| return interrupts[int_num]; |
| } |
| |
| void |
| serialize(CheckpointOut &cp) const override |
| { |
| SERIALIZE_ARRAY(interrupts,NumInterruptTypes); |
| SERIALIZE_SCALAR(intStatus); |
| } |
| |
| void |
| unserialize(CheckpointIn &cp) override |
| { |
| UNSERIALIZE_ARRAY(interrupts,NumInterruptTypes); |
| UNSERIALIZE_SCALAR(intStatus); |
| } |
| }; |
| } // namespace SPARC_ISA |
| |
| #endif // __ARCH_SPARC_INTERRUPT_HH__ |
