e7825aab59
The shadow registers are folded into the normal integer registers to ease renaming indexing.
Include the removed Opcdec class of instructions for faulting when a pal mode only instruction is decoded in non-pal mode.
arch/alpha/ev5.cc:
Changes to automatically map the shadow registers if the instruction is in PAL mode.
arch/alpha/isa/branch.isa:
arch/alpha/isa/decoder.isa:
arch/alpha/isa/fp.isa:
arch/alpha/isa/int.isa:
arch/alpha/isa/mem.isa:
arch/alpha/isa/pal.isa:
arch/alpha/isa/unimp.isa:
Changes for automatically using the shadow registers. Now instructions must decode based on an ExtMachInst, which is a MachInst with any decode context information concatenated onto the higher order bits.
arch/alpha/isa/main.isa:
Changes for automatically using the shadow registers. Now instructions must decode based on an ExtMachInst, which is a MachInst with any decode context information concatenated onto the higher order bits.
The decoder (for Alpha) uses the 32nd bit in order to determine if the machine is in PAL mode. If it is, then it refers to the reg_redir table to determine the true index of the register it is using.
Also include the opcdec instruction definition.
arch/alpha/isa_traits.hh:
Define ExtMachInst type that is used by the static inst in order to decode the instruction, given the context of being in pal mode or not.
Redefine the number of Int registers, splitting it into NumIntArchRegs (32) and NumIntRegs (32 + 8 shadow registers).
Change the dependence tags to reflect the integer registers include the 8 shadow registers.
Define function to make an ExtMachInst. Currently it is somewhat specific to Alpha; in the future it must be decided to make this more generic and possibly slower, or leave it specific to each architecture and ifdef it within the CPU.
arch/isa_parser.py:
Have static insts decode on the ExtMachInst.
base/remote_gdb.cc:
Support the automatic remapping of shadow registers. Remote GDB must now look at the PC being read in order to tell if it should use the normal register indices or the shadow register indices.
cpu/o3/regfile.hh:
Comment out the pal registers; they are now a part of the integer registers.
cpu/simple/cpu.cc:
Create an ExtMachInst to decode on, based on the normal MachInst and the PC of the instructoin.
cpu/static_inst.hh:
Change from MachInst to ExtMachInst to support shadow register renaming.
--HG--
extra : convert_revision : 1d23eabf735e297068e1917445a6348e9f8c88d5
623 lines
17 KiB
C++
623 lines
17 KiB
C++
/*
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* Copyright (c) 2002-2005 The Regents of The University of Michigan
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met: redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer;
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* redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution;
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* neither the name of the copyright holders nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "arch/alpha/tlb.hh"
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#include "arch/alpha/isa_traits.hh"
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#include "arch/alpha/osfpal.hh"
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#include "base/kgdb.h"
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#include "base/remote_gdb.hh"
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#include "base/stats/events.hh"
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#include "config/full_system.hh"
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#include "cpu/base.hh"
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#include "cpu/exec_context.hh"
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#include "cpu/fast/cpu.hh"
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#include "kern/kernel_stats.hh"
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#include "sim/debug.hh"
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#include "sim/sim_events.hh"
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#if FULL_SYSTEM
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using namespace EV5;
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////////////////////////////////////////////////////////////////////////
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//
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// Machine dependent functions
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//
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void
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AlphaISA::initCPU(RegFile *regs, int cpuId)
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{
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initIPRs(®s->miscRegs, cpuId);
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regs->intRegFile[16] = cpuId;
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regs->intRegFile[0] = cpuId;
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regs->pc = regs->miscRegs.readReg(IPR_PAL_BASE) + (new ResetFault)->vect();
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regs->npc = regs->pc + sizeof(MachInst);
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}
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////////////////////////////////////////////////////////////////////////
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//
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//
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//
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void
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AlphaISA::initIPRs(MiscRegFile *miscRegs, int cpuId)
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{
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miscRegs->clearIprs();
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miscRegs->setReg(IPR_PAL_BASE, PalBase);
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miscRegs->setReg(IPR_MCSR, 0x6);
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miscRegs->setReg(IPR_PALtemp16, cpuId);
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}
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|
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template <class CPU>
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void
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AlphaISA::processInterrupts(CPU *cpu)
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{
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//Check if there are any outstanding interrupts
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//Handle the interrupts
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int ipl = 0;
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int summary = 0;
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cpu->checkInterrupts = false;
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if (cpu->readMiscReg(IPR_ASTRR))
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panic("asynchronous traps not implemented\n");
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if (cpu->readMiscReg(IPR_SIRR)) {
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for (int i = INTLEVEL_SOFTWARE_MIN;
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i < INTLEVEL_SOFTWARE_MAX; i++) {
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if (cpu->readMiscReg(IPR_SIRR) & (ULL(1) << i)) {
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// See table 4-19 of the 21164 hardware reference
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ipl = (i - INTLEVEL_SOFTWARE_MIN) + 1;
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summary |= (ULL(1) << i);
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}
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}
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}
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uint64_t interrupts = cpu->intr_status();
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if (interrupts) {
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for (int i = INTLEVEL_EXTERNAL_MIN;
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i < INTLEVEL_EXTERNAL_MAX; i++) {
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if (interrupts & (ULL(1) << i)) {
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// See table 4-19 of the 21164 hardware reference
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ipl = i;
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summary |= (ULL(1) << i);
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}
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}
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}
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if (ipl && ipl > cpu->readMiscReg(IPR_IPLR)) {
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cpu->setMiscReg(IPR_ISR, summary);
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cpu->setMiscReg(IPR_INTID, ipl);
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cpu->trap(new InterruptFault);
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DPRINTF(Flow, "Interrupt! IPLR=%d ipl=%d summary=%x\n",
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cpu->readMiscReg(IPR_IPLR), ipl, summary);
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}
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}
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template <class CPU>
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void
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AlphaISA::zeroRegisters(CPU *cpu)
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{
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// Insure ISA semantics
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// (no longer very clean due to the change in setIntReg() in the
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// cpu model. Consider changing later.)
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cpu->xc->setIntReg(ZeroReg, 0);
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cpu->xc->setFloatRegDouble(ZeroReg, 0.0);
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}
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void
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ExecContext::ev5_temp_trap(Fault fault)
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{
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DPRINTF(Fault, "Fault %s at PC: %#x\n", fault->name(), regs.pc);
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cpu->recordEvent(csprintf("Fault %s", fault->name()));
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assert(!misspeculating());
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kernelStats->fault(fault);
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if (fault->isA<ArithmeticFault>())
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panic("Arithmetic traps are unimplemented!");
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// exception restart address
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if (!fault->isA<InterruptFault>() || !inPalMode())
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setMiscReg(AlphaISA::IPR_EXC_ADDR, regs.pc);
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if (fault->isA<PalFault>() || fault->isA<ArithmeticFault>() /* ||
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fault == InterruptFault && !inPalMode() */) {
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// traps... skip faulting instruction.
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setMiscReg(AlphaISA::IPR_EXC_ADDR,
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readMiscReg(AlphaISA::IPR_EXC_ADDR) + 4);
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}
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regs.pc = readMiscReg(AlphaISA::IPR_PAL_BASE) +
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(dynamic_cast<AlphaFault *>(fault.get()))->vect();
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regs.npc = regs.pc + sizeof(MachInst);
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}
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void
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AlphaISA::intr_post(RegFile *regs, Fault fault, Addr pc)
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{
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bool use_pc = (fault == NoFault);
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if (fault->isA<ArithmeticFault>())
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panic("arithmetic faults NYI...");
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// compute exception restart address
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if (use_pc || fault->isA<PalFault>() || fault->isA<ArithmeticFault>()) {
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// traps... skip faulting instruction
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regs->miscRegs.setReg(IPR_EXC_ADDR, regs->pc + 4);
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} else {
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// fault, post fault at excepting instruction
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regs->miscRegs.setReg(IPR_EXC_ADDR, regs->pc);
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}
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// jump to expection address (PAL PC bit set here as well...)
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if (!use_pc)
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regs->npc = regs->miscRegs.readReg(IPR_PAL_BASE) +
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(dynamic_cast<AlphaFault *>(fault.get()))->vect();
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else
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regs->npc = regs->miscRegs.readReg(IPR_PAL_BASE) + pc;
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// that's it! (orders of magnitude less painful than x86)
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}
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Fault
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ExecContext::hwrei()
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{
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if (!inPalMode())
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return new UnimplementedOpcodeFault;
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setNextPC(readMiscReg(AlphaISA::IPR_EXC_ADDR));
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if (!misspeculating()) {
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kernelStats->hwrei();
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cpu->checkInterrupts = true;
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}
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// FIXME: XXX check for interrupts? XXX
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return NoFault;
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}
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void
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AlphaISA::MiscRegFile::clearIprs()
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{
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bzero((char *)ipr, NumInternalProcRegs * sizeof(InternalProcReg));
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}
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AlphaISA::MiscReg
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AlphaISA::MiscRegFile::readIpr(int idx, Fault &fault, ExecContext *xc)
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{
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uint64_t retval = 0; // return value, default 0
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switch (idx) {
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case AlphaISA::IPR_PALtemp0:
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case AlphaISA::IPR_PALtemp1:
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case AlphaISA::IPR_PALtemp2:
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case AlphaISA::IPR_PALtemp3:
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case AlphaISA::IPR_PALtemp4:
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case AlphaISA::IPR_PALtemp5:
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case AlphaISA::IPR_PALtemp6:
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case AlphaISA::IPR_PALtemp7:
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case AlphaISA::IPR_PALtemp8:
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case AlphaISA::IPR_PALtemp9:
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case AlphaISA::IPR_PALtemp10:
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case AlphaISA::IPR_PALtemp11:
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case AlphaISA::IPR_PALtemp12:
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case AlphaISA::IPR_PALtemp13:
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case AlphaISA::IPR_PALtemp14:
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case AlphaISA::IPR_PALtemp15:
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case AlphaISA::IPR_PALtemp16:
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case AlphaISA::IPR_PALtemp17:
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case AlphaISA::IPR_PALtemp18:
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case AlphaISA::IPR_PALtemp19:
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case AlphaISA::IPR_PALtemp20:
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case AlphaISA::IPR_PALtemp21:
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case AlphaISA::IPR_PALtemp22:
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case AlphaISA::IPR_PALtemp23:
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case AlphaISA::IPR_PAL_BASE:
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case AlphaISA::IPR_IVPTBR:
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case AlphaISA::IPR_DC_MODE:
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case AlphaISA::IPR_MAF_MODE:
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case AlphaISA::IPR_ISR:
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case AlphaISA::IPR_EXC_ADDR:
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case AlphaISA::IPR_IC_PERR_STAT:
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case AlphaISA::IPR_DC_PERR_STAT:
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case AlphaISA::IPR_MCSR:
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case AlphaISA::IPR_ASTRR:
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case AlphaISA::IPR_ASTER:
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case AlphaISA::IPR_SIRR:
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case AlphaISA::IPR_ICSR:
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case AlphaISA::IPR_ICM:
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case AlphaISA::IPR_DTB_CM:
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case AlphaISA::IPR_IPLR:
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case AlphaISA::IPR_INTID:
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case AlphaISA::IPR_PMCTR:
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// no side-effect
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retval = ipr[idx];
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break;
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case AlphaISA::IPR_CC:
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retval |= ipr[idx] & ULL(0xffffffff00000000);
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retval |= xc->cpu->curCycle() & ULL(0x00000000ffffffff);
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break;
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case AlphaISA::IPR_VA:
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retval = ipr[idx];
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break;
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|
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|
case AlphaISA::IPR_VA_FORM:
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|
case AlphaISA::IPR_MM_STAT:
|
|
case AlphaISA::IPR_IFAULT_VA_FORM:
|
|
case AlphaISA::IPR_EXC_MASK:
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case AlphaISA::IPR_EXC_SUM:
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retval = ipr[idx];
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break;
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|
case AlphaISA::IPR_DTB_PTE:
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{
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AlphaISA::PTE &pte = xc->dtb->index(!xc->misspeculating());
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retval |= ((u_int64_t)pte.ppn & ULL(0x7ffffff)) << 32;
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retval |= ((u_int64_t)pte.xre & ULL(0xf)) << 8;
|
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retval |= ((u_int64_t)pte.xwe & ULL(0xf)) << 12;
|
|
retval |= ((u_int64_t)pte.fonr & ULL(0x1)) << 1;
|
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retval |= ((u_int64_t)pte.fonw & ULL(0x1))<< 2;
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retval |= ((u_int64_t)pte.asma & ULL(0x1)) << 4;
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retval |= ((u_int64_t)pte.asn & ULL(0x7f)) << 57;
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}
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break;
|
|
|
|
// write only registers
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|
case AlphaISA::IPR_HWINT_CLR:
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case AlphaISA::IPR_SL_XMIT:
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|
case AlphaISA::IPR_DC_FLUSH:
|
|
case AlphaISA::IPR_IC_FLUSH:
|
|
case AlphaISA::IPR_ALT_MODE:
|
|
case AlphaISA::IPR_DTB_IA:
|
|
case AlphaISA::IPR_DTB_IAP:
|
|
case AlphaISA::IPR_ITB_IA:
|
|
case AlphaISA::IPR_ITB_IAP:
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fault = new UnimplementedOpcodeFault;
|
|
break;
|
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|
|
default:
|
|
// invalid IPR
|
|
fault = new UnimplementedOpcodeFault;
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break;
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}
|
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|
|
return retval;
|
|
}
|
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|
|
#ifdef DEBUG
|
|
// Cause the simulator to break when changing to the following IPL
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int break_ipl = -1;
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|
#endif
|
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|
|
Fault
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AlphaISA::MiscRegFile::setIpr(int idx, uint64_t val, ExecContext *xc)
|
|
{
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|
uint64_t old;
|
|
|
|
if (xc->misspeculating())
|
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return NoFault;
|
|
|
|
switch (idx) {
|
|
case AlphaISA::IPR_PALtemp0:
|
|
case AlphaISA::IPR_PALtemp1:
|
|
case AlphaISA::IPR_PALtemp2:
|
|
case AlphaISA::IPR_PALtemp3:
|
|
case AlphaISA::IPR_PALtemp4:
|
|
case AlphaISA::IPR_PALtemp5:
|
|
case AlphaISA::IPR_PALtemp6:
|
|
case AlphaISA::IPR_PALtemp7:
|
|
case AlphaISA::IPR_PALtemp8:
|
|
case AlphaISA::IPR_PALtemp9:
|
|
case AlphaISA::IPR_PALtemp10:
|
|
case AlphaISA::IPR_PALtemp11:
|
|
case AlphaISA::IPR_PALtemp12:
|
|
case AlphaISA::IPR_PALtemp13:
|
|
case AlphaISA::IPR_PALtemp14:
|
|
case AlphaISA::IPR_PALtemp15:
|
|
case AlphaISA::IPR_PALtemp16:
|
|
case AlphaISA::IPR_PALtemp17:
|
|
case AlphaISA::IPR_PALtemp18:
|
|
case AlphaISA::IPR_PALtemp19:
|
|
case AlphaISA::IPR_PALtemp20:
|
|
case AlphaISA::IPR_PALtemp21:
|
|
case AlphaISA::IPR_PALtemp22:
|
|
case AlphaISA::IPR_PAL_BASE:
|
|
case AlphaISA::IPR_IC_PERR_STAT:
|
|
case AlphaISA::IPR_DC_PERR_STAT:
|
|
case AlphaISA::IPR_PMCTR:
|
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// write entire quad w/ no side-effect
|
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ipr[idx] = val;
|
|
break;
|
|
|
|
case AlphaISA::IPR_CC_CTL:
|
|
// This IPR resets the cycle counter. We assume this only
|
|
// happens once... let's verify that.
|
|
assert(ipr[idx] == 0);
|
|
ipr[idx] = 1;
|
|
break;
|
|
|
|
case AlphaISA::IPR_CC:
|
|
// This IPR only writes the upper 64 bits. It's ok to write
|
|
// all 64 here since we mask out the lower 32 in rpcc (see
|
|
// isa_desc).
|
|
ipr[idx] = val;
|
|
break;
|
|
|
|
case AlphaISA::IPR_PALtemp23:
|
|
// write entire quad w/ no side-effect
|
|
old = ipr[idx];
|
|
ipr[idx] = val;
|
|
xc->kernelStats->context(old, val);
|
|
break;
|
|
|
|
case AlphaISA::IPR_DTB_PTE:
|
|
// write entire quad w/ no side-effect, tag is forthcoming
|
|
ipr[idx] = val;
|
|
break;
|
|
|
|
case AlphaISA::IPR_EXC_ADDR:
|
|
// second least significant bit in PC is always zero
|
|
ipr[idx] = val & ~2;
|
|
break;
|
|
|
|
case AlphaISA::IPR_ASTRR:
|
|
case AlphaISA::IPR_ASTER:
|
|
// only write least significant four bits - privilege mask
|
|
ipr[idx] = val & 0xf;
|
|
break;
|
|
|
|
case AlphaISA::IPR_IPLR:
|
|
#ifdef DEBUG
|
|
if (break_ipl != -1 && break_ipl == (val & 0x1f))
|
|
debug_break();
|
|
#endif
|
|
|
|
// only write least significant five bits - interrupt level
|
|
ipr[idx] = val & 0x1f;
|
|
xc->kernelStats->swpipl(ipr[idx]);
|
|
break;
|
|
|
|
case AlphaISA::IPR_DTB_CM:
|
|
if (val & 0x18)
|
|
xc->kernelStats->mode(Kernel::user);
|
|
else
|
|
xc->kernelStats->mode(Kernel::kernel);
|
|
|
|
case AlphaISA::IPR_ICM:
|
|
// only write two mode bits - processor mode
|
|
ipr[idx] = val & 0x18;
|
|
break;
|
|
|
|
case AlphaISA::IPR_ALT_MODE:
|
|
// only write two mode bits - processor mode
|
|
ipr[idx] = val & 0x18;
|
|
break;
|
|
|
|
case AlphaISA::IPR_MCSR:
|
|
// more here after optimization...
|
|
ipr[idx] = val;
|
|
break;
|
|
|
|
case AlphaISA::IPR_SIRR:
|
|
// only write software interrupt mask
|
|
ipr[idx] = val & 0x7fff0;
|
|
break;
|
|
|
|
case AlphaISA::IPR_ICSR:
|
|
ipr[idx] = val & ULL(0xffffff0300);
|
|
break;
|
|
|
|
case AlphaISA::IPR_IVPTBR:
|
|
case AlphaISA::IPR_MVPTBR:
|
|
ipr[idx] = val & ULL(0xffffffffc0000000);
|
|
break;
|
|
|
|
case AlphaISA::IPR_DC_TEST_CTL:
|
|
ipr[idx] = val & 0x1ffb;
|
|
break;
|
|
|
|
case AlphaISA::IPR_DC_MODE:
|
|
case AlphaISA::IPR_MAF_MODE:
|
|
ipr[idx] = val & 0x3f;
|
|
break;
|
|
|
|
case AlphaISA::IPR_ITB_ASN:
|
|
ipr[idx] = val & 0x7f0;
|
|
break;
|
|
|
|
case AlphaISA::IPR_DTB_ASN:
|
|
ipr[idx] = val & ULL(0xfe00000000000000);
|
|
break;
|
|
|
|
case AlphaISA::IPR_EXC_SUM:
|
|
case AlphaISA::IPR_EXC_MASK:
|
|
// any write to this register clears it
|
|
ipr[idx] = 0;
|
|
break;
|
|
|
|
case AlphaISA::IPR_INTID:
|
|
case AlphaISA::IPR_SL_RCV:
|
|
case AlphaISA::IPR_MM_STAT:
|
|
case AlphaISA::IPR_ITB_PTE_TEMP:
|
|
case AlphaISA::IPR_DTB_PTE_TEMP:
|
|
// read-only registers
|
|
return new UnimplementedOpcodeFault;
|
|
|
|
case AlphaISA::IPR_HWINT_CLR:
|
|
case AlphaISA::IPR_SL_XMIT:
|
|
case AlphaISA::IPR_DC_FLUSH:
|
|
case AlphaISA::IPR_IC_FLUSH:
|
|
// the following are write only
|
|
ipr[idx] = val;
|
|
break;
|
|
|
|
case AlphaISA::IPR_DTB_IA:
|
|
// really a control write
|
|
ipr[idx] = 0;
|
|
|
|
xc->dtb->flushAll();
|
|
break;
|
|
|
|
case AlphaISA::IPR_DTB_IAP:
|
|
// really a control write
|
|
ipr[idx] = 0;
|
|
|
|
xc->dtb->flushProcesses();
|
|
break;
|
|
|
|
case AlphaISA::IPR_DTB_IS:
|
|
// really a control write
|
|
ipr[idx] = val;
|
|
|
|
xc->dtb->flushAddr(val, DTB_ASN_ASN(ipr[AlphaISA::IPR_DTB_ASN]));
|
|
break;
|
|
|
|
case AlphaISA::IPR_DTB_TAG: {
|
|
struct AlphaISA::PTE pte;
|
|
|
|
// FIXME: granularity hints NYI...
|
|
if (DTB_PTE_GH(ipr[AlphaISA::IPR_DTB_PTE]) != 0)
|
|
panic("PTE GH field != 0");
|
|
|
|
// write entire quad
|
|
ipr[idx] = val;
|
|
|
|
// construct PTE for new entry
|
|
pte.ppn = DTB_PTE_PPN(ipr[AlphaISA::IPR_DTB_PTE]);
|
|
pte.xre = DTB_PTE_XRE(ipr[AlphaISA::IPR_DTB_PTE]);
|
|
pte.xwe = DTB_PTE_XWE(ipr[AlphaISA::IPR_DTB_PTE]);
|
|
pte.fonr = DTB_PTE_FONR(ipr[AlphaISA::IPR_DTB_PTE]);
|
|
pte.fonw = DTB_PTE_FONW(ipr[AlphaISA::IPR_DTB_PTE]);
|
|
pte.asma = DTB_PTE_ASMA(ipr[AlphaISA::IPR_DTB_PTE]);
|
|
pte.asn = DTB_ASN_ASN(ipr[AlphaISA::IPR_DTB_ASN]);
|
|
|
|
// insert new TAG/PTE value into data TLB
|
|
xc->dtb->insert(val, pte);
|
|
}
|
|
break;
|
|
|
|
case AlphaISA::IPR_ITB_PTE: {
|
|
struct AlphaISA::PTE pte;
|
|
|
|
// FIXME: granularity hints NYI...
|
|
if (ITB_PTE_GH(val) != 0)
|
|
panic("PTE GH field != 0");
|
|
|
|
// write entire quad
|
|
ipr[idx] = val;
|
|
|
|
// construct PTE for new entry
|
|
pte.ppn = ITB_PTE_PPN(val);
|
|
pte.xre = ITB_PTE_XRE(val);
|
|
pte.xwe = 0;
|
|
pte.fonr = ITB_PTE_FONR(val);
|
|
pte.fonw = ITB_PTE_FONW(val);
|
|
pte.asma = ITB_PTE_ASMA(val);
|
|
pte.asn = ITB_ASN_ASN(ipr[AlphaISA::IPR_ITB_ASN]);
|
|
|
|
// insert new TAG/PTE value into data TLB
|
|
xc->itb->insert(ipr[AlphaISA::IPR_ITB_TAG], pte);
|
|
}
|
|
break;
|
|
|
|
case AlphaISA::IPR_ITB_IA:
|
|
// really a control write
|
|
ipr[idx] = 0;
|
|
|
|
xc->itb->flushAll();
|
|
break;
|
|
|
|
case AlphaISA::IPR_ITB_IAP:
|
|
// really a control write
|
|
ipr[idx] = 0;
|
|
|
|
xc->itb->flushProcesses();
|
|
break;
|
|
|
|
case AlphaISA::IPR_ITB_IS:
|
|
// really a control write
|
|
ipr[idx] = val;
|
|
|
|
xc->itb->flushAddr(val, ITB_ASN_ASN(ipr[AlphaISA::IPR_ITB_ASN]));
|
|
break;
|
|
|
|
default:
|
|
// invalid IPR
|
|
return new UnimplementedOpcodeFault;
|
|
}
|
|
|
|
// no error...
|
|
return NoFault;
|
|
}
|
|
|
|
/**
|
|
* Check for special simulator handling of specific PAL calls.
|
|
* If return value is false, actual PAL call will be suppressed.
|
|
*/
|
|
bool
|
|
ExecContext::simPalCheck(int palFunc)
|
|
{
|
|
kernelStats->callpal(palFunc);
|
|
|
|
switch (palFunc) {
|
|
case PAL::halt:
|
|
halt();
|
|
if (--System::numSystemsRunning == 0)
|
|
new SimExitEvent("all cpus halted");
|
|
break;
|
|
|
|
case PAL::bpt:
|
|
case PAL::bugchk:
|
|
if (system->breakpoint())
|
|
return false;
|
|
break;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
//Forward instantiation for FastCPU object
|
|
template
|
|
void AlphaISA::processInterrupts(FastCPU *xc);
|
|
|
|
//Forward instantiation for FastCPU object
|
|
template
|
|
void AlphaISA::zeroRegisters(FastCPU *xc);
|
|
|
|
#endif // FULL_SYSTEM
|