| // -*- mode:c++ -*- |
| |
| // Copyright (c) 2003-2005 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: Gabe Black |
| // Korey Sewell |
| |
| //////////////////////////////////////////////////////////////////// |
| // |
| // Memory-format instructions: LoadAddress, Load, Store |
| // |
| |
| output header {{ |
| /** |
| * Base class for general Mips memory-format instructions. |
| */ |
| class Memory : public MipsStaticInst |
| { |
| protected: |
| |
| /// Memory request flags. See mem_req_base.hh. |
| unsigned memAccessFlags; |
| /// Pointer to EAComp object. |
| const StaticInstPtr eaCompPtr; |
| /// Pointer to MemAcc object. |
| const StaticInstPtr memAccPtr; |
| |
| /// Displacement for EA calculation (signed). |
| int32_t disp; |
| |
| /// Constructor |
| Memory(const char *mnem, MachInst _machInst, OpClass __opClass, |
| StaticInstPtr _eaCompPtr = nullStaticInstPtr, |
| StaticInstPtr _memAccPtr = nullStaticInstPtr) |
| : MipsStaticInst(mnem, _machInst, __opClass), |
| memAccessFlags(0), eaCompPtr(_eaCompPtr), memAccPtr(_memAccPtr), |
| disp(OFFSET) |
| { |
| //If Bit 15 is 1 then Sign Extend |
| int32_t temp = disp & 0x00008000; |
| |
| if (temp > 0) { |
| disp |= 0xFFFF0000; |
| } |
| } |
| |
| std::string |
| generateDisassembly(Addr pc, const SymbolTable *symtab) const; |
| |
| public: |
| |
| const StaticInstPtr &eaCompInst() const { return eaCompPtr; } |
| const StaticInstPtr &memAccInst() const { return memAccPtr; } |
| }; |
| |
| }}; |
| |
| |
| output decoder {{ |
| std::string |
| Memory::generateDisassembly(Addr pc, const SymbolTable *symtab) const |
| { |
| return csprintf("%-10s %c%d,%d(r%d)", mnemonic, |
| flags[IsFloating] ? 'f' : 'r', RT, disp, RS); |
| } |
| |
| }}; |
| |
| def format LoadAddress(code) {{ |
| iop = InstObjParams(name, Name, 'MemoryDisp32', CodeBlock(code)) |
| header_output = BasicDeclare.subst(iop) |
| decoder_output = BasicConstructor.subst(iop) |
| decode_block = BasicDecode.subst(iop) |
| exec_output = BasicExecute.subst(iop) |
| }}; |
| |
| |
| def template LoadStoreDeclare {{ |
| /** |
| * Static instruction class for "%(mnemonic)s". |
| */ |
| class %(class_name)s : public %(base_class)s |
| { |
| protected: |
| |
| /** |
| * "Fake" effective address computation class for "%(mnemonic)s". |
| */ |
| class EAComp : public %(base_class)s |
| { |
| public: |
| /// Constructor |
| EAComp(MachInst machInst); |
| |
| %(BasicExecDeclare)s |
| }; |
| |
| /** |
| * "Fake" memory access instruction class for "%(mnemonic)s". |
| */ |
| class MemAcc : public %(base_class)s |
| { |
| public: |
| /// Constructor |
| MemAcc(MachInst machInst); |
| |
| %(BasicExecDeclare)s |
| }; |
| |
| public: |
| |
| /// Constructor. |
| %(class_name)s(MachInst machInst); |
| |
| %(BasicExecDeclare)s |
| |
| %(InitiateAccDeclare)s |
| |
| %(CompleteAccDeclare)s |
| }; |
| }}; |
| |
| |
| def template InitiateAccDeclare {{ |
| Fault initiateAcc(%(CPU_exec_context)s *, Trace::InstRecord *) const; |
| }}; |
| |
| |
| def template CompleteAccDeclare {{ |
| Fault completeAcc(uint8_t *, %(CPU_exec_context)s *, Trace::InstRecord *) const; |
| }}; |
| |
| |
| def template LoadStoreConstructor {{ |
| /** TODO: change op_class to AddrGenOp or something (requires |
| * creating new member of OpClass enum in op_class.hh, updating |
| * config files, etc.). */ |
| inline %(class_name)s::EAComp::EAComp(MachInst machInst) |
| : %(base_class)s("%(mnemonic)s (EAComp)", machInst, IntAluOp) |
| { |
| %(ea_constructor)s; |
| } |
| |
| inline %(class_name)s::MemAcc::MemAcc(MachInst machInst) |
| : %(base_class)s("%(mnemonic)s (MemAcc)", machInst, %(op_class)s) |
| { |
| %(memacc_constructor)s; |
| } |
| |
| inline %(class_name)s::%(class_name)s(MachInst machInst) |
| : %(base_class)s("%(mnemonic)s", machInst, %(op_class)s, |
| new EAComp(machInst), new MemAcc(machInst)) |
| { |
| %(constructor)s; |
| } |
| }}; |
| |
| |
| def template EACompExecute {{ |
| Fault |
| %(class_name)s::EAComp::execute(%(CPU_exec_context)s *xc, |
| Trace::InstRecord *traceData) const |
| { |
| Addr EA; |
| Fault fault = NoFault; |
| |
| %(fp_enable_check)s; |
| %(op_decl)s; |
| %(op_rd)s; |
| %(code)s; |
| |
| if (fault == NoFault) { |
| %(op_wb)s; |
| xc->setEA(EA); |
| } |
| |
| return fault; |
| } |
| }}; |
| |
| def template LoadMemAccExecute {{ |
| Fault |
| %(class_name)s::MemAcc::execute(%(CPU_exec_context)s *xc, |
| Trace::InstRecord *traceData) const |
| { |
| Addr EA; |
| Fault fault = NoFault; |
| |
| %(fp_enable_check)s; |
| %(op_decl)s; |
| %(op_rd)s; |
| EA = xc->getEA(); |
| |
| if (fault == NoFault) { |
| fault = xc->read(EA, (uint%(mem_acc_size)d_t&)Mem, memAccessFlags); |
| %(code)s; |
| } |
| |
| if (fault == NoFault) { |
| %(op_wb)s; |
| } |
| |
| return fault; |
| } |
| }}; |
| |
| |
| def template LoadExecute {{ |
| Fault %(class_name)s::execute(%(CPU_exec_context)s *xc, |
| Trace::InstRecord *traceData) const |
| { |
| Addr EA; |
| Fault fault = NoFault; |
| |
| %(fp_enable_check)s; |
| %(op_decl)s; |
| %(op_rd)s; |
| %(ea_code)s; |
| |
| if (fault == NoFault) { |
| fault = xc->read(EA, (uint%(mem_acc_size)d_t&)Mem, memAccessFlags); |
| %(memacc_code)s; |
| } |
| |
| if (fault == NoFault) { |
| %(op_wb)s; |
| } |
| |
| return fault; |
| } |
| }}; |
| |
| |
| def template LoadInitiateAcc {{ |
| Fault %(class_name)s::initiateAcc(%(CPU_exec_context)s *xc, |
| Trace::InstRecord *traceData) const |
| { |
| Addr EA; |
| Fault fault = NoFault; |
| |
| %(fp_enable_check)s; |
| %(op_src_decl)s; |
| %(op_rd)s; |
| %(ea_code)s; |
| |
| if (fault == NoFault) { |
| fault = xc->read(EA, (uint%(mem_acc_size)d_t &)Mem, memAccessFlags); |
| } |
| |
| return fault; |
| } |
| }}; |
| |
| |
| def template LoadCompleteAcc {{ |
| Fault %(class_name)s::completeAcc(uint8_t *data, |
| %(CPU_exec_context)s *xc, |
| Trace::InstRecord *traceData) const |
| { |
| Fault fault = NoFault; |
| |
| %(fp_enable_check)s; |
| %(op_decl)s; |
| |
| memcpy(&Mem, data, sizeof(Mem)); |
| |
| if (fault == NoFault) { |
| %(memacc_code)s; |
| } |
| |
| if (fault == NoFault) { |
| %(op_wb)s; |
| } |
| |
| return fault; |
| } |
| }}; |
| |
| |
| def template StoreMemAccExecute {{ |
| Fault |
| %(class_name)s::MemAcc::execute(%(CPU_exec_context)s *xc, |
| Trace::InstRecord *traceData) const |
| { |
| Addr EA; |
| Fault fault = NoFault; |
| uint64_t write_result = 0; |
| |
| %(fp_enable_check)s; |
| %(op_decl)s; |
| %(op_rd)s; |
| EA = xc->getEA(); |
| |
| if (fault == NoFault) { |
| %(code)s; |
| } |
| |
| if (fault == NoFault) { |
| fault = xc->write((uint%(mem_acc_size)d_t&)Mem, EA, |
| memAccessFlags, &write_result); |
| if (traceData) { traceData->setData(Mem); } |
| } |
| |
| if (fault == NoFault) { |
| %(postacc_code)s; |
| } |
| |
| if (fault == NoFault) { |
| %(op_wb)s; |
| } |
| |
| return fault; |
| } |
| }}; |
| |
| |
| def template StoreExecute {{ |
| Fault %(class_name)s::execute(%(CPU_exec_context)s *xc, |
| Trace::InstRecord *traceData) const |
| { |
| Addr EA; |
| Fault fault = NoFault; |
| uint64_t write_result = 0; |
| |
| %(fp_enable_check)s; |
| %(op_decl)s; |
| %(op_rd)s; |
| %(ea_code)s; |
| |
| if (fault == NoFault) { |
| %(memacc_code)s; |
| } |
| |
| if (fault == NoFault) { |
| fault = xc->write((uint%(mem_acc_size)d_t&)Mem, EA, |
| memAccessFlags, &write_result); |
| if (traceData) { traceData->setData(Mem); } |
| } |
| |
| if (fault == NoFault) { |
| %(postacc_code)s; |
| } |
| |
| if (fault == NoFault) { |
| %(op_wb)s; |
| } |
| |
| return fault; |
| } |
| }}; |
| |
| def template StoreInitiateAcc {{ |
| Fault %(class_name)s::initiateAcc(%(CPU_exec_context)s *xc, |
| Trace::InstRecord *traceData) const |
| { |
| Addr EA; |
| Fault fault = NoFault; |
| uint64_t write_result = 0; |
| |
| %(fp_enable_check)s; |
| %(op_decl)s; |
| %(op_rd)s; |
| %(ea_code)s; |
| |
| if (fault == NoFault) { |
| %(memacc_code)s; |
| } |
| |
| if (fault == NoFault) { |
| fault = xc->write((uint%(mem_acc_size)d_t&)Mem, EA, |
| memAccessFlags, &write_result); |
| if (traceData) { traceData->setData(Mem); } |
| } |
| |
| return fault; |
| } |
| }}; |
| |
| |
| def template StoreCompleteAcc {{ |
| Fault %(class_name)s::completeAcc(uint8_t *data, |
| %(CPU_exec_context)s *xc, |
| Trace::InstRecord *traceData) const |
| { |
| Fault fault = NoFault; |
| uint64_t write_result = 0; |
| |
| %(fp_enable_check)s; |
| %(op_dest_decl)s; |
| |
| memcpy(&write_result, data, sizeof(write_result)); |
| |
| if (fault == NoFault) { |
| %(postacc_code)s; |
| } |
| |
| if (fault == NoFault) { |
| %(op_wb)s; |
| } |
| |
| return fault; |
| } |
| }}; |
| |
| // load instructions use Rt as dest, so check for |
| // Rt == 31 to detect nops |
| def template LoadNopCheckDecode {{ |
| { |
| MipsStaticInst *i = new %(class_name)s(machInst); |
| if (RT == 0) { |
| i = makeNop(i); |
| } |
| return i; |
| } |
| }}; |
| |
| def format LoadMemory(memacc_code, ea_code = {{ EA = Rs + disp; }}, |
| mem_flags = [], inst_flags = []) {{ |
| (header_output, decoder_output, decode_block, exec_output) = \ |
| LoadStoreBase(name, Name, ea_code, memacc_code, mem_flags, inst_flags, |
| decode_template = LoadNopCheckDecode, |
| exec_template_base = 'Load') |
| }}; |
| |
| |
| def format StoreMemory(memacc_code, ea_code = {{ EA = Rs + disp; }}, |
| mem_flags = [], inst_flags = []) {{ |
| (header_output, decoder_output, decode_block, exec_output) = \ |
| LoadStoreBase(name, Name, ea_code, memacc_code, mem_flags, inst_flags, |
| exec_template_base = 'Store') |
| }}; |
| |
| //FP loads are offloaded to these formats for now ... |
| def format LoadFloatMemory(memacc_code, ea_code = {{ EA = Rs + disp; }}, |
| mem_flags = [], inst_flags = []) {{ |
| (header_output, decoder_output, decode_block, exec_output) = \ |
| LoadStoreBase(name, Name, ea_code, memacc_code, mem_flags, inst_flags, |
| decode_template = BasicDecode, |
| exec_template_base = 'Load') |
| }}; |
| |
| |
| def format StoreFloatMemory(memacc_code, ea_code = {{ EA = Rs + disp; }}, |
| mem_flags = [], inst_flags = []) {{ |
| (header_output, decoder_output, decode_block, exec_output) = \ |
| LoadStoreBase(name, Name, ea_code, memacc_code, mem_flags, inst_flags, |
| exec_template_base = 'Store') |
| }}; |
| |
| |
| def format UnalignedStore(memacc_code, postacc_code, |
| ea_code = {{ EA = Rb + disp; }}, |
| mem_flags = [], inst_flags = []) {{ |
| (header_output, decoder_output, decode_block, exec_output) = \ |
| LoadStoreBase(name, Name, ea_code, memacc_code, mem_flags, inst_flags, |
| postacc_code, exec_template_base = 'Store') |
| }}; |