| // Copyright (c) 2006-2007 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. |
| |
| //////////////////////////////////////////////////////////////////// |
| // |
| // Mem utility templates and functions |
| // |
| |
| // This template provides the execute functions for a load |
| def template LoadExecute {{ |
| Fault %(class_name)s::execute(ExecContext *xc, |
| trace::InstRecord *traceData) const |
| { |
| Fault fault = NoFault; |
| Addr EA; |
| %(op_decl)s; |
| %(op_rd)s; |
| %(ea_code)s; |
| DPRINTF(Sparc, "%s: The address is 0x%x\n", mnemonic, EA); |
| %(fault_check)s; |
| if (fault == NoFault) { |
| %(EA_trunc)s |
| fault = readMemAtomicBE(xc, traceData, EA, Mem, %(asi_val)s); |
| } |
| if (fault == NoFault) { |
| %(code)s; |
| } |
| if (fault == NoFault) { |
| // Write the resulting state to the execution context |
| %(op_wb)s; |
| } |
| |
| return fault; |
| } |
| }}; |
| |
| def template LoadInitiateAcc {{ |
| Fault %(class_name)s::initiateAcc(ExecContext * xc, |
| trace::InstRecord * traceData) const |
| { |
| Fault fault = NoFault; |
| Addr EA; |
| %(op_decl)s; |
| %(op_rd)s; |
| %(ea_code)s; |
| DPRINTF(Sparc, "%s: The address is 0x%x\n", mnemonic, EA); |
| %(fault_check)s; |
| if (fault == NoFault) { |
| %(EA_trunc)s |
| fault = initiateMemRead(xc, traceData, EA, Mem, %(asi_val)s); |
| } |
| return fault; |
| } |
| }}; |
| |
| def template LoadCompleteAcc {{ |
| Fault %(class_name)s::completeAcc(PacketPtr pkt, ExecContext * xc, |
| trace::InstRecord * traceData) const |
| { |
| Fault fault = NoFault; |
| %(op_decl)s; |
| %(op_rd)s; |
| getMemBE(pkt, Mem, traceData); |
| %(code)s; |
| if (fault == NoFault) { |
| %(op_wb)s; |
| } |
| return fault; |
| } |
| }}; |
| |
| // This template provides the execute functions for a store |
| def template StoreExecute {{ |
| Fault %(class_name)s::execute(ExecContext *xc, |
| trace::InstRecord *traceData) const |
| { |
| Fault fault = NoFault; |
| // This is to support the conditional store in cas instructions. |
| // It should be optomized out in all the others |
| bool storeCond = true; |
| Addr EA; |
| %(op_decl)s; |
| %(op_rd)s; |
| %(ea_code)s; |
| DPRINTF(Sparc, "%s: The address is 0x%x\n", mnemonic, EA); |
| %(fault_check)s; |
| if (fault == NoFault) { |
| %(code)s; |
| } |
| if (storeCond && fault == NoFault) { |
| %(EA_trunc)s |
| fault = writeMemAtomicBE( |
| xc, traceData, Mem, EA, %(asi_val)s, 0); |
| } |
| if (fault == NoFault) { |
| // Write the resulting state to the execution context |
| %(op_wb)s; |
| } |
| |
| return fault; |
| } |
| }}; |
| |
| def template StoreInitiateAcc {{ |
| Fault %(class_name)s::initiateAcc(ExecContext * xc, |
| trace::InstRecord * traceData) const |
| { |
| Fault fault = NoFault; |
| bool storeCond = true; |
| Addr EA; |
| %(op_decl)s; |
| |
| %(op_rd)s; |
| %(ea_code)s; |
| DPRINTF(Sparc, "%s: The address is 0x%x\n", mnemonic, EA); |
| %(fault_check)s; |
| if (fault == NoFault) { |
| %(code)s; |
| } |
| if (storeCond && fault == NoFault) { |
| %(EA_trunc)s |
| fault = writeMemTimingBE( |
| xc, traceData, Mem, EA, %(asi_val)s, 0); |
| } |
| return fault; |
| } |
| }}; |
| |
| def template StoreCompleteAcc {{ |
| Fault %(class_name)s::completeAcc(PacketPtr, ExecContext * xc, |
| trace::InstRecord * traceData) const |
| { |
| return NoFault; |
| } |
| }}; |
| |
| // Here are some code snippets which check for various fault conditions |
| let {{ |
| LoadFuncs = [LoadExecute, LoadInitiateAcc, LoadCompleteAcc] |
| StoreFuncs = [StoreExecute, StoreInitiateAcc, StoreCompleteAcc] |
| |
| # The LSB can be zero, since it's really the MSB in doubles and quads |
| # and we're dealing with doubles |
| BlockAlignmentFaultCheck = ''' |
| if (RD & 0xe) |
| fault = std::make_shared<IllegalInstruction>(); |
| else if (EA & 0x3f) |
| fault = std::make_shared<MemAddressNotAligned>(); |
| ''' |
| TwinAlignmentFaultCheck = ''' |
| if (RD & 0x1) |
| fault = std::make_shared<IllegalInstruction>(); |
| else if (EA & 0xf) |
| fault = std::make_shared<MemAddressNotAligned>(); |
| ''' |
| # XXX Need to take care of pstate.hpriv as well. The lower ASIs |
| # are split into ones that are available in priv and hpriv, and |
| # those that are only available in hpriv |
| AlternateASIPrivFaultCheck = ''' |
| if ((!Pstate.priv && !Hpstate.hpriv && |
| !asiIsUnPriv((ASI)EXT_ASI)) || |
| (!Hpstate.hpriv && asiIsHPriv((ASI)EXT_ASI))) |
| fault = std::make_shared<PrivilegedAction>(); |
| else if (asiIsAsIfUser((ASI)EXT_ASI) && !Pstate.priv) |
| fault = std::make_shared<PrivilegedAction>(); |
| ''' |
| |
| TruncateEA = ''' |
| if (!FullSystem) { |
| EA = Pstate.am ? EA<31:0> : EA; |
| } |
| ''' |
| }}; |
| |
| // A simple function to generate the name of the macro op of a certain |
| // instruction at a certain micropc |
| let {{ |
| def makeMicroName(name, microPc): |
| return name + "::" + name + "_" + str(microPc) |
| }}; |
| |
| // This function properly generates the execute functions for one of the |
| // templates above. This is needed because in one case, ea computation, |
| // fault checks and the actual code all occur in the same function, |
| // and in the other they're distributed across two. Also note that for |
| // execute functions, the name of the base class doesn't matter. |
| let {{ |
| def doSplitExecute(execute, name, Name, asi, opt_flags, microParam): |
| microParam["asi_val"] = asi; |
| iop = InstObjParams(name, Name, '', microParam, opt_flags) |
| (execf, initf, compf) = execute |
| return execf.subst(iop) + initf.subst(iop) + compf.subst(iop) |
| |
| |
| def doDualSplitExecute(code, postacc_code, eaRegCode, eaImmCode, execute, |
| faultCode, nameReg, nameImm, NameReg, NameImm, asi, opt_flags): |
| executeCode = '' |
| for (eaCode, name, Name) in ( |
| (eaRegCode, nameReg, NameReg), |
| (eaImmCode, nameImm, NameImm)): |
| microParams = {"code": code, "postacc_code" : postacc_code, |
| "ea_code": eaCode, "fault_check": faultCode, |
| "EA_trunc" : TruncateEA} |
| executeCode += doSplitExecute(execute, name, Name, |
| asi, opt_flags, microParams) |
| return executeCode |
| }}; |
