From c8fc116c7636893517254f785707eba1726d3265 Mon Sep 17 00:00:00 2001 From: Gabe Black Date: Fri, 3 Nov 2006 02:25:39 -0500 Subject: [PATCH] Add a new file which describes an ISA's interrupt handling mechanism. It records when interrupts are requested, and returns an interrupt to execute if the --HG-- extra : convert_revision : c535000a6a170caefd441687b60f940513d29739 --- src/arch/SConscript | 1 + src/arch/alpha/interrupts.hh | 171 +++++++++++++++++++++++++++++++++++ src/cpu/base.cc | 43 ++------- src/cpu/base.hh | 18 ++-- src/cpu/o3/alpha/cpu_impl.hh | 48 +--------- src/cpu/simple/base.cc | 37 +------- 6 files changed, 194 insertions(+), 124 deletions(-) create mode 100644 src/arch/alpha/interrupts.hh diff --git a/src/arch/SConscript b/src/arch/SConscript index dda1dea53..092fad225 100644 --- a/src/arch/SConscript +++ b/src/arch/SConscript @@ -49,6 +49,7 @@ sources = [] isa_switch_hdrs = Split(''' arguments.hh faults.hh + interrupts.hh isa_traits.hh locked_mem.hh process.hh diff --git a/src/arch/alpha/interrupts.hh b/src/arch/alpha/interrupts.hh new file mode 100644 index 000000000..2f031f434 --- /dev/null +++ b/src/arch/alpha/interrupts.hh @@ -0,0 +1,171 @@ +/* + * 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: Steve Reinhardt + * Kevin Lim + */ + +#ifndef __ARCH_ALPHA_INTERRUPT_HH__ +#define __ARCH_ALPHA_INTERRUPT_HH__ + +#include "arch/alpha/faults.hh" +#include "arch/alpha/isa_traits.hh" +#include "cpu/thread_context.hh" + +namespace AlphaISA +{ + class Interrupts + { + protected: + uint64_t interrupts[NumInterruptLevels]; + uint64_t intstatus; + + public: + Interrupts() + { + memset(interrupts, 0, sizeof(interrupts)); + intstatus = 0; + } + + void post(int int_num, int index) + { + DPRINTF(Interrupt, "Interrupt %d:%d posted\n", int_num, index); + + if (int_num < 0 || int_num >= NumInterruptLevels) + panic("int_num out of bounds\n"); + + if (index < 0 || index >= sizeof(uint64_t) * 8) + panic("int_num out of bounds\n"); + + interrupts[int_num] |= 1 << index; + intstatus |= (ULL(1) << int_num); + } + + void clear(int int_num, int index) + { + DPRINTF(Interrupt, "Interrupt %d:%d cleared\n", int_num, index); + + if (int_num < 0 || int_num >= TheISA::NumInterruptLevels) + panic("int_num out of bounds\n"); + + if (index < 0 || index >= sizeof(uint64_t) * 8) + panic("int_num out of bounds\n"); + + interrupts[int_num] &= ~(1 << index); + if (interrupts[int_num] == 0) + intstatus &= ~(ULL(1) << int_num); + } + + void clear_all() + { + DPRINTF(Interrupt, "Interrupts all cleared\n"); + + memset(interrupts, 0, sizeof(interrupts)); + intstatus = 0; + } + + bool check_interrupt(int int_num) const { + if (int_num > NumInterruptLevels) + panic("int_num out of bounds\n"); + + return interrupts[int_num] != 0; + } + + bool check_interrupts() const { return intstatus != 0; } + + void serialize(std::ostream &os) + { + SERIALIZE_ARRAY(interrupts, NumInterruptLevels); + SERIALIZE_SCALAR(intstatus); + } + + void unserialize(Checkpoint *cp, const std::string §ion) + { + UNSERIALIZE_ARRAY(interrupts, NumInterruptLevels); + UNSERIALIZE_SCALAR(intstatus); + } + + Fault getInterrupt(ThreadContext * tc) + { + int ipl = 0; + int summary = 0; + + if (tc->readMiscReg(IPR_ASTRR)) + panic("asynchronous traps not implemented\n"); + + if (tc->readMiscReg(IPR_SIRR)) { + for (int i = INTLEVEL_SOFTWARE_MIN; + i < INTLEVEL_SOFTWARE_MAX; i++) { + if (tc->readMiscReg(IPR_SIRR) & (ULL(1) << i)) { + // See table 4-19 of 21164 hardware reference + ipl = (i - INTLEVEL_SOFTWARE_MIN) + 1; + summary |= (ULL(1) << i); + } + } + } + + uint64_t interrupts = intstatus; + if (interrupts) { + for (int i = INTLEVEL_EXTERNAL_MIN; + i < INTLEVEL_EXTERNAL_MAX; i++) { + if (interrupts & (ULL(1) << i)) { + // See table 4-19 of 21164 hardware reference + ipl = i; + summary |= (ULL(1) << i); + } + } + } + + if (ipl && ipl > tc->readMiscReg(IPR_IPLR)) { + tc->setMiscReg(IPR_ISR, summary); + tc->setMiscReg(IPR_INTID, ipl); + + /* The following needs to be added back in somehow */ + // Checker needs to know these two registers were updated. +/*#if USE_CHECKER + if (this->checker) { + this->checker->threadBase()->setMiscReg(IPR_ISR, summary); + this->checker->threadBase()->setMiscReg(IPR_INTID, ipl); + } +#endif*/ + + DPRINTF(Flow, "Interrupt! IPLR=%d ipl=%d summary=%x\n", + tc->readMiscReg(IPR_IPLR), ipl, summary); + + return new InterruptFault; + } else { + return NoFault; + } + } + + private: + uint64_t intr_status() const { return intstatus; } + }; +} + +#endif + diff --git a/src/cpu/base.cc b/src/cpu/base.cc index ea4b03bf2..66c5d3e11 100644 --- a/src/cpu/base.cc +++ b/src/cpu/base.cc @@ -168,11 +168,6 @@ BaseCPU::BaseCPU(Params *p) p->max_loads_all_threads, *counter); } -#if FULL_SYSTEM - memset(interrupts, 0, sizeof(interrupts)); - intstatus = 0; -#endif - functionTracingEnabled = false; if (p->functionTrace) { functionTraceStream = simout.find(csprintf("ftrace.%s", name())); @@ -314,9 +309,7 @@ BaseCPU::takeOverFrom(BaseCPU *oldCPU) } #if FULL_SYSTEM - for (int i = 0; i < TheISA::NumInterruptLevels; ++i) - interrupts[i] = oldCPU->interrupts[i]; - intstatus = oldCPU->intstatus; + interrupts = oldCPU->interrupts; checkInterrupts = oldCPU->checkInterrupts; for (int i = 0; i < threadContexts.size(); ++i) @@ -348,57 +341,33 @@ BaseCPU::ProfileEvent::process() void BaseCPU::post_interrupt(int int_num, int index) { - DPRINTF(Interrupt, "Interrupt %d:%d posted\n", int_num, index); - - if (int_num < 0 || int_num >= TheISA::NumInterruptLevels) - panic("int_num out of bounds\n"); - - if (index < 0 || index >= sizeof(uint64_t) * 8) - panic("int_num out of bounds\n"); - checkInterrupts = true; - interrupts[int_num] |= 1 << index; - intstatus |= (ULL(1) << int_num); + interrupts.post(int_num, index); } void BaseCPU::clear_interrupt(int int_num, int index) { - DPRINTF(Interrupt, "Interrupt %d:%d cleared\n", int_num, index); - - if (int_num < 0 || int_num >= TheISA::NumInterruptLevels) - panic("int_num out of bounds\n"); - - if (index < 0 || index >= sizeof(uint64_t) * 8) - panic("int_num out of bounds\n"); - - interrupts[int_num] &= ~(1 << index); - if (interrupts[int_num] == 0) - intstatus &= ~(ULL(1) << int_num); + interrupts.clear(int_num, index); } void BaseCPU::clear_interrupts() { - DPRINTF(Interrupt, "Interrupts all cleared\n"); - - memset(interrupts, 0, sizeof(interrupts)); - intstatus = 0; + interrupts.clear_all(); } void BaseCPU::serialize(std::ostream &os) { - SERIALIZE_ARRAY(interrupts, TheISA::NumInterruptLevels); - SERIALIZE_SCALAR(intstatus); + interrupts.serialize(os); } void BaseCPU::unserialize(Checkpoint *cp, const std::string §ion) { - UNSERIALIZE_ARRAY(interrupts, TheISA::NumInterruptLevels); - UNSERIALIZE_SCALAR(intstatus); + interrupts.unserialize(cp, section); } #endif // FULL_SYSTEM diff --git a/src/cpu/base.hh b/src/cpu/base.hh index 75e0d86af..207473d80 100644 --- a/src/cpu/base.hh +++ b/src/cpu/base.hh @@ -40,6 +40,10 @@ #include "mem/mem_object.hh" #include "arch/isa_traits.hh" +#if FULL_SYSTEM +#include "arch/interrupts.hh" +#endif + class BranchPred; class CheckerCPU; class ThreadContext; @@ -75,8 +79,9 @@ class BaseCPU : public MemObject #if FULL_SYSTEM protected: - uint64_t interrupts[TheISA::NumInterruptLevels]; - uint64_t intstatus; +// uint64_t interrupts[TheISA::NumInterruptLevels]; +// uint64_t intstatus; + TheISA::Interrupts interrupts; public: virtual void post_interrupt(int int_num, int index); @@ -85,14 +90,11 @@ class BaseCPU : public MemObject bool checkInterrupts; bool check_interrupt(int int_num) const { - if (int_num > TheISA::NumInterruptLevels) - panic("int_num out of bounds\n"); - - return interrupts[int_num] != 0; + return interrupts.check_interrupt(int_num); } - bool check_interrupts() const { return intstatus != 0; } - uint64_t intr_status() const { return intstatus; } + bool check_interrupts() const { return interrupts.check_interrupts(); } + //uint64_t intr_status() const { return interrupts.intr_status(); } class ProfileEvent : public Event { diff --git a/src/cpu/o3/alpha/cpu_impl.hh b/src/cpu/o3/alpha/cpu_impl.hh index f5c2170ce..170a53c23 100644 --- a/src/cpu/o3/alpha/cpu_impl.hh +++ b/src/cpu/o3/alpha/cpu_impl.hh @@ -270,7 +270,6 @@ template void AlphaO3CPU::processInterrupts() { - using namespace TheISA; // Check for interrupts here. For now can copy the code that // exists within isa_fullsys_traits.hh. Also assume that thread 0 // is the one that handles the interrupts. @@ -279,52 +278,11 @@ AlphaO3CPU::processInterrupts() // Check if there are any outstanding interrupts //Handle the interrupts - int ipl = 0; - int summary = 0; - this->checkInterrupts = false; + Fault interrupt = this->interrupts.getInterrupt(this->tcBase(0)); - if (this->readMiscReg(IPR_ASTRR, 0)) - panic("asynchronous traps not implemented\n"); - - if (this->readMiscReg(IPR_SIRR, 0)) { - for (int i = INTLEVEL_SOFTWARE_MIN; - i < INTLEVEL_SOFTWARE_MAX; i++) { - if (this->readMiscReg(IPR_SIRR, 0) & (ULL(1) << i)) { - // See table 4-19 of the 21164 hardware reference - ipl = (i - INTLEVEL_SOFTWARE_MIN) + 1; - summary |= (ULL(1) << i); - } - } - } - - uint64_t interrupts = this->intr_status(); - - if (interrupts) { - for (int i = INTLEVEL_EXTERNAL_MIN; - i < INTLEVEL_EXTERNAL_MAX; i++) { - if (interrupts & (ULL(1) << i)) { - // See table 4-19 of the 21164 hardware reference - ipl = i; - summary |= (ULL(1) << i); - } - } - } - - if (ipl && ipl > this->readMiscReg(IPR_IPLR, 0)) { - this->setMiscReg(IPR_ISR, summary, 0); - this->setMiscReg(IPR_INTID, ipl, 0); - // Checker needs to know these two registers were updated. -#if USE_CHECKER - if (this->checker) { - this->checker->threadBase()->setMiscReg(IPR_ISR, summary); - this->checker->threadBase()->setMiscReg(IPR_INTID, ipl); - } -#endif - this->trap(Fault(new InterruptFault), 0); - DPRINTF(Flow, "Interrupt! IPLR=%d ipl=%d summary=%x\n", - this->readMiscReg(IPR_IPLR, 0), ipl, summary); - } + if (interrupt != NoFault) + this->trap(interrupt, 0); } #endif // FULL_SYSTEM diff --git a/src/cpu/simple/base.cc b/src/cpu/simple/base.cc index 6a2c0bbe9..0c7b5eafe 100644 --- a/src/cpu/simple/base.cc +++ b/src/cpu/simple/base.cc @@ -312,42 +312,11 @@ BaseSimpleCPU::checkForInterrupts() { #if FULL_SYSTEM if (checkInterrupts && check_interrupts() && !thread->inPalMode()) { - int ipl = 0; - int summary = 0; checkInterrupts = false; + Fault interrupt = interrupts.getInterrupt(tc); - if (thread->readMiscReg(IPR_SIRR)) { - for (int i = INTLEVEL_SOFTWARE_MIN; - i < INTLEVEL_SOFTWARE_MAX; i++) { - if (thread->readMiscReg(IPR_SIRR) & (ULL(1) << i)) { - // See table 4-19 of 21164 hardware reference - ipl = (i - INTLEVEL_SOFTWARE_MIN) + 1; - summary |= (ULL(1) << i); - } - } - } - - uint64_t interrupts = thread->cpu->intr_status(); - for (int i = INTLEVEL_EXTERNAL_MIN; - i < INTLEVEL_EXTERNAL_MAX; i++) { - if (interrupts & (ULL(1) << i)) { - // See table 4-19 of 21164 hardware reference - ipl = i; - summary |= (ULL(1) << i); - } - } - - if (thread->readMiscReg(IPR_ASTRR)) - panic("asynchronous traps not implemented\n"); - - if (ipl && ipl > thread->readMiscReg(IPR_IPLR)) { - thread->setMiscReg(IPR_ISR, summary); - thread->setMiscReg(IPR_INTID, ipl); - - Fault(new InterruptFault)->invoke(tc); - - DPRINTF(Flow, "Interrupt! IPLR=%d ipl=%d summary=%x\n", - thread->readMiscReg(IPR_IPLR), ipl, summary); + if (interrupt != NoFault) { + interrupt->invoke(tc); } } #endif -- 2.30.2