| /* |
| * Copyright (c) 2004-2005 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: Kevin Lim |
| * Gabe Black |
| */ |
| |
| #ifndef __CPU_O3_REGFILE_HH__ |
| #define __CPU_O3_REGFILE_HH__ |
| |
| #include <vector> |
| |
| #include "arch/isa_traits.hh" |
| #include "arch/types.hh" |
| #include "base/trace.hh" |
| #include "config/full_system.hh" |
| #include "config/the_isa.hh" |
| #include "cpu/o3/comm.hh" |
| #include "debug/IEW.hh" |
| |
| #if FULL_SYSTEM |
| #include "arch/kernel_stats.hh" |
| #endif |
| |
| /** |
| * Simple physical register file class. |
| * Right now this is specific to Alpha until we decide if/how to make things |
| * generic enough to support other ISAs. |
| */ |
| template <class Impl> |
| class PhysRegFile |
| { |
| protected: |
| typedef TheISA::IntReg IntReg; |
| typedef TheISA::FloatReg FloatReg; |
| typedef TheISA::FloatRegBits FloatRegBits; |
| |
| typedef union { |
| FloatReg d; |
| FloatRegBits q; |
| } PhysFloatReg; |
| |
| // Note that most of the definitions of the IntReg, FloatReg, etc. exist |
| // within the Impl/ISA class and not within this PhysRegFile class. |
| |
| // Will make these registers public for now, but they probably should |
| // be private eventually with some accessor functions. |
| public: |
| typedef typename Impl::O3CPU O3CPU; |
| |
| /** |
| * Constructs a physical register file with the specified amount of |
| * integer and floating point registers. |
| */ |
| PhysRegFile(O3CPU *_cpu, unsigned _numPhysicalIntRegs, |
| unsigned _numPhysicalFloatRegs); |
| |
| //Everything below should be pretty well identical to the normal |
| //register file that exists within AlphaISA class. |
| //The duplication is unfortunate but it's better than having |
| //different ways to access certain registers. |
| |
| /** Reads an integer register. */ |
| uint64_t readIntReg(PhysRegIndex reg_idx) |
| { |
| assert(reg_idx < numPhysicalIntRegs); |
| |
| DPRINTF(IEW, "RegFile: Access to int register %i, has data " |
| "%#x\n", int(reg_idx), intRegFile[reg_idx]); |
| return intRegFile[reg_idx]; |
| } |
| |
| /** Reads a floating point register (double precision). */ |
| FloatReg readFloatReg(PhysRegIndex reg_idx) |
| { |
| // Remove the base Float reg dependency. |
| reg_idx = reg_idx - numPhysicalIntRegs; |
| |
| assert(reg_idx < numPhysicalFloatRegs + numPhysicalIntRegs); |
| |
| FloatReg floatReg = floatRegFile[reg_idx].d; |
| |
| DPRINTF(IEW, "RegFile: Access to float register %i, has " |
| "data %#x\n", int(reg_idx), floatRegFile[reg_idx].q); |
| |
| return floatReg; |
| } |
| |
| FloatRegBits readFloatRegBits(PhysRegIndex reg_idx) |
| { |
| // Remove the base Float reg dependency. |
| reg_idx = reg_idx - numPhysicalIntRegs; |
| |
| assert(reg_idx < numPhysicalFloatRegs + numPhysicalIntRegs); |
| |
| FloatRegBits floatRegBits = floatRegFile[reg_idx].q; |
| |
| DPRINTF(IEW, "RegFile: Access to float register %i as int, " |
| "has data %#x\n", int(reg_idx), (uint64_t)floatRegBits); |
| |
| return floatRegBits; |
| } |
| |
| /** Sets an integer register to the given value. */ |
| void setIntReg(PhysRegIndex reg_idx, uint64_t val) |
| { |
| assert(reg_idx < numPhysicalIntRegs); |
| |
| DPRINTF(IEW, "RegFile: Setting int register %i to %#x\n", |
| int(reg_idx), val); |
| |
| if (reg_idx != TheISA::ZeroReg) |
| intRegFile[reg_idx] = val; |
| } |
| |
| /** Sets a double precision floating point register to the given value. */ |
| void setFloatReg(PhysRegIndex reg_idx, FloatReg val) |
| { |
| // Remove the base Float reg dependency. |
| reg_idx = reg_idx - numPhysicalIntRegs; |
| |
| assert(reg_idx < numPhysicalFloatRegs); |
| |
| DPRINTF(IEW, "RegFile: Setting float register %i to %#x\n", |
| int(reg_idx), (uint64_t)val); |
| |
| #if THE_ISA == ALPHA_ISA |
| if (reg_idx != TheISA::ZeroReg) |
| #endif |
| floatRegFile[reg_idx].d = val; |
| } |
| |
| void setFloatRegBits(PhysRegIndex reg_idx, FloatRegBits val) |
| { |
| // Remove the base Float reg dependency. |
| reg_idx = reg_idx - numPhysicalIntRegs; |
| |
| assert(reg_idx < numPhysicalFloatRegs); |
| |
| DPRINTF(IEW, "RegFile: Setting float register %i to %#x\n", |
| int(reg_idx), (uint64_t)val); |
| |
| floatRegFile[reg_idx].q = val; |
| } |
| |
| public: |
| /** (signed) integer register file. */ |
| IntReg *intRegFile; |
| |
| /** Floating point register file. */ |
| PhysFloatReg *floatRegFile; |
| |
| #if FULL_SYSTEM |
| private: |
| int intrflag; // interrupt flag |
| #endif |
| |
| private: |
| /** CPU pointer. */ |
| O3CPU *cpu; |
| |
| public: |
| /** Number of physical integer registers. */ |
| unsigned numPhysicalIntRegs; |
| /** Number of physical floating point registers. */ |
| unsigned numPhysicalFloatRegs; |
| }; |
| |
| template <class Impl> |
| PhysRegFile<Impl>::PhysRegFile(O3CPU *_cpu, unsigned _numPhysicalIntRegs, |
| unsigned _numPhysicalFloatRegs) |
| : cpu(_cpu), numPhysicalIntRegs(_numPhysicalIntRegs), |
| numPhysicalFloatRegs(_numPhysicalFloatRegs) |
| { |
| intRegFile = new IntReg[numPhysicalIntRegs]; |
| floatRegFile = new PhysFloatReg[numPhysicalFloatRegs]; |
| |
| memset(intRegFile, 0, sizeof(IntReg) * numPhysicalIntRegs); |
| memset(floatRegFile, 0, sizeof(PhysFloatReg) * numPhysicalFloatRegs); |
| } |
| |
| #endif |