| // -*- mode:c++ -*- |
| |
| // Copyright (c) 2007 MIPS Technologies, Inc. |
| // 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 |
| // Korey Sewell |
| |
| //////////////////////////////////////////////////////////////////// |
| // |
| // Memory-format instructions |
| // |
| |
| output header {{ |
| /** |
| * Base class for general Mips memory-format instructions. |
| */ |
| class Memory : public MipsStaticInst |
| { |
| protected: |
| /// Memory request flags. See mem_req_base.hh. |
| Request::Flags memAccessFlags; |
| |
| /// Displacement for EA calculation (signed). |
| int32_t disp; |
| |
| /// Constructor |
| Memory(const char *mnem, MachInst _machInst, OpClass __opClass) |
| : MipsStaticInst(mnem, _machInst, __opClass), |
| disp(sext<16>(OFFSET)) |
| { |
| } |
| |
| std::string generateDisassembly( |
| Addr pc, const SymbolTable *symtab) const override; |
| }; |
| |
| /** |
| * Base class for a few miscellaneous memory-format insts |
| * that don't interpret the disp field |
| */ |
| class MemoryNoDisp : public Memory |
| { |
| protected: |
| /// Constructor |
| MemoryNoDisp(const char *mnem, ExtMachInst _machInst, OpClass __opClass) |
| : Memory(mnem, _machInst, __opClass) |
| { |
| } |
| |
| std::string generateDisassembly( |
| Addr pc, const SymbolTable *symtab) const override; |
| }; |
| }}; |
| |
| |
| 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); |
| } |
| |
| std::string |
| MemoryNoDisp::generateDisassembly(Addr pc, const SymbolTable *symtab) const |
| { |
| return csprintf("%-10s %c%d, r%d(r%d)", mnemonic, |
| flags[IsFloating] ? 'f' : 'r', |
| flags[IsFloating] ? FD : RD, |
| RS, RT); |
| } |
| |
| }}; |
| |
| output header {{ |
| uint64_t getMemData(ExecContext *xc, Packet *packet); |
| |
| }}; |
| |
| output exec {{ |
| /** return data in cases where there the size of data is only |
| known in the packet |
| */ |
| uint64_t getMemData(ExecContext *xc, Packet *packet) { |
| switch (packet->getSize()) |
| { |
| case 1: |
| return packet->getLE<uint8_t>(); |
| |
| case 2: |
| return packet->getLE<uint16_t>(); |
| |
| case 4: |
| return packet->getLE<uint32_t>(); |
| |
| case 8: |
| return packet->getLE<uint64_t>(); |
| |
| default: |
| panic("bad store data size = %d", packet->getSize()); |
| return 0; |
| } |
| } |
| |
| |
| }}; |
| |
| def template LoadStoreDeclare {{ |
| /** |
| * Static instruction class for "%(mnemonic)s". |
| */ |
| class %(class_name)s : public %(base_class)s |
| { |
| public: |
| |
| /// Constructor. |
| %(class_name)s(ExtMachInst machInst); |
| |
| Fault execute(ExecContext *, Trace::InstRecord *) const override; |
| Fault initiateAcc(ExecContext *, Trace::InstRecord *) const override; |
| Fault completeAcc(Packet *, ExecContext *, |
| Trace::InstRecord *) const override; |
| }; |
| }}; |
| |
| |
| def template LoadStoreConstructor {{ |
| %(class_name)s::%(class_name)s(ExtMachInst machInst) |
| : %(base_class)s("%(mnemonic)s", machInst, %(op_class)s) |
| { |
| %(constructor)s; |
| } |
| }}; |
| |
| def template LoadExecute {{ |
| Fault %(class_name)s::execute(ExecContext *xc, |
| Trace::InstRecord *traceData) const |
| { |
| Addr EA; |
| Fault fault = NoFault; |
| |
| if (this->isFloating()) { |
| %(fp_enable_check)s; |
| |
| if(fault != NoFault) |
| return fault; |
| } |
| |
| %(op_decl)s; |
| %(op_rd)s; |
| %(ea_code)s; |
| |
| if (fault == NoFault) { |
| fault = readMemAtomic(xc, traceData, EA, Mem, memAccessFlags); |
| %(memacc_code)s; |
| } |
| |
| if (fault == NoFault) { |
| %(op_wb)s; |
| } |
| |
| return fault; |
| } |
| }}; |
| |
| |
| def template LoadInitiateAcc {{ |
| Fault %(class_name)s::initiateAcc(ExecContext *xc, |
| Trace::InstRecord *traceData) const |
| { |
| Addr EA; |
| Fault fault = NoFault; |
| |
| if (this->isFloating()) { |
| %(fp_enable_check)s; |
| |
| if(fault != NoFault) |
| return fault; |
| } |
| |
| %(op_src_decl)s; |
| %(op_rd)s; |
| %(ea_code)s; |
| |
| if (fault == NoFault) { |
| fault = initiateMemRead(xc, traceData, EA, Mem, memAccessFlags); |
| } |
| |
| return fault; |
| } |
| }}; |
| |
| def template LoadCompleteAcc {{ |
| Fault %(class_name)s::completeAcc(Packet *pkt, ExecContext *xc, |
| Trace::InstRecord *traceData) const |
| { |
| Fault fault = NoFault; |
| |
| if (this->isFloating()) { |
| %(fp_enable_check)s; |
| |
| if(fault != NoFault) |
| return fault; |
| } |
| |
| %(op_decl)s; |
| %(op_rd)s; |
| |
| getMem(pkt, Mem, traceData); |
| |
| if (fault == NoFault) { |
| %(memacc_code)s; |
| } |
| |
| if (fault == NoFault) { |
| %(op_wb)s; |
| } |
| |
| return fault; |
| } |
| }}; |
| |
| def template StoreExecute {{ |
| Fault %(class_name)s::execute(ExecContext *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) { |
| %(memacc_code)s; |
| } |
| |
| if (fault == NoFault) { |
| fault = writeMemAtomic(xc, traceData, Mem, EA, memAccessFlags, |
| NULL); |
| } |
| |
| if (fault == NoFault) { |
| %(postacc_code)s; |
| } |
| |
| if (fault == NoFault) { |
| %(op_wb)s; |
| } |
| |
| return fault; |
| } |
| }}; |
| |
| |
| def template StoreFPExecute {{ |
| Fault %(class_name)s::execute(ExecContext *xc, |
| Trace::InstRecord *traceData) const |
| { |
| Addr EA; |
| Fault fault = NoFault; |
| |
| %(fp_enable_check)s; |
| if(fault != NoFault) |
| return fault; |
| %(op_decl)s; |
| %(op_rd)s; |
| %(ea_code)s; |
| |
| if (fault == NoFault) { |
| %(memacc_code)s; |
| } |
| |
| if (fault == NoFault) { |
| fault = writeMemAtomic(xc, traceData, Mem, EA, memAccessFlags, |
| NULL); |
| } |
| |
| if (fault == NoFault) { |
| %(postacc_code)s; |
| } |
| |
| if (fault == NoFault) { |
| %(op_wb)s; |
| } |
| |
| return fault; |
| } |
| }}; |
| |
| def template StoreCondExecute {{ |
| Fault %(class_name)s::execute(ExecContext *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 = writeMemAtomic(xc, traceData, Mem, EA, memAccessFlags, |
| &write_result); |
| } |
| |
| if (fault == NoFault) { |
| %(postacc_code)s; |
| } |
| |
| if (fault == NoFault) { |
| %(op_wb)s; |
| } |
| |
| return fault; |
| } |
| }}; |
| |
| def template StoreInitiateAcc {{ |
| Fault %(class_name)s::initiateAcc(ExecContext *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) { |
| %(memacc_code)s; |
| } |
| |
| if (fault == NoFault) { |
| fault = writeMemTiming(xc, traceData, Mem, EA, memAccessFlags, |
| NULL); |
| } |
| |
| return fault; |
| } |
| }}; |
| |
| |
| def template StoreCompleteAcc {{ |
| Fault %(class_name)s::completeAcc(Packet *pkt, |
| ExecContext *xc, |
| Trace::InstRecord *traceData) const |
| { |
| return NoFault; |
| } |
| }}; |
| |
| def template StoreCondCompleteAcc {{ |
| Fault %(class_name)s::completeAcc(Packet *pkt, |
| ExecContext *xc, |
| Trace::InstRecord *traceData) const |
| { |
| Fault fault = NoFault; |
| |
| %(fp_enable_check)s; |
| %(op_dest_decl)s; |
| |
| uint64_t write_result = pkt->req->getExtraData(); |
| |
| if (fault == NoFault) { |
| %(postacc_code)s; |
| } |
| |
| if (fault == NoFault) { |
| %(op_wb)s; |
| } |
| |
| return fault; |
| } |
| }}; |
| |
| def template MiscExecute {{ |
| Fault %(class_name)s::execute(ExecContext *xc, |
| Trace::InstRecord *traceData) const |
| { |
| Addr EA M5_VAR_USED = 0; |
| Fault fault = NoFault; |
| |
| %(fp_enable_check)s; |
| %(op_decl)s; |
| %(op_rd)s; |
| %(ea_code)s; |
| |
| if (fault == NoFault) { |
| %(memacc_code)s; |
| } |
| |
| return NoFault; |
| } |
| }}; |
| |
| def template MiscInitiateAcc {{ |
| Fault %(class_name)s::initiateAcc(ExecContext *xc, |
| Trace::InstRecord *traceData) const |
| { |
| panic("Misc instruction does not support split access method!"); |
| return NoFault; |
| } |
| }}; |
| |
| |
| def template MiscCompleteAcc {{ |
| Fault %(class_name)s::completeAcc(Packet *pkt, ExecContext *xc, |
| Trace::InstRecord *traceData) const |
| { |
| panic("Misc instruction does not support split access method!"); |
| |
| return NoFault; |
| } |
| }}; |
| |
| 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 = ImmNopCheckDecode, |
| 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') |
| }}; |
| |
| def format LoadIndexedMemory(memacc_code, ea_code = {{ EA = Rs + Rt; }}, |
| mem_flags = [], inst_flags = []) {{ |
| inst_flags += ['IsIndexed'] |
| (header_output, decoder_output, decode_block, exec_output) = \ |
| LoadStoreBase(name, Name, ea_code, memacc_code, mem_flags, inst_flags, |
| decode_template = ImmNopCheckDecode, |
| exec_template_base = 'Load') |
| }}; |
| |
| def format StoreIndexedMemory(memacc_code, ea_code = {{ EA = Rs + Rt; }}, |
| mem_flags = [], inst_flags = []) {{ |
| inst_flags += ['IsIndexed'] |
| (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 LoadFPIndexedMemory(memacc_code, ea_code = {{ EA = Rs + Rt; }}, |
| mem_flags = [], inst_flags = []) {{ |
| inst_flags += ['IsIndexed', 'IsFloating'] |
| (header_output, decoder_output, decode_block, exec_output) = \ |
| LoadStoreBase(name, Name, ea_code, memacc_code, mem_flags, inst_flags, |
| decode_template = ImmNopCheckDecode, |
| exec_template_base = 'Load') |
| }}; |
| |
| def format StoreFPIndexedMemory(memacc_code, ea_code = {{ EA = Rs + Rt; }}, |
| mem_flags = [], inst_flags = []) {{ |
| inst_flags += ['IsIndexed', 'IsFloating'] |
| (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 LoadUnalignedMemory(memacc_code, ea_code = {{ EA = (Rs + disp) & ~3; }}, |
| mem_flags = [], inst_flags = []) {{ |
| decl_code = ''' |
| uint32_t mem_word = Mem_uw; |
| uint32_t unalign_addr = Rs + disp; |
| uint32_t byte_offset = unalign_addr & 3; |
| if (GuestByteOrder == BigEndianByteOrder) |
| byte_offset ^= 3; |
| ''' |
| |
| memacc_code = decl_code + memacc_code |
| |
| (header_output, decoder_output, decode_block, exec_output) = \ |
| LoadStoreBase(name, Name, ea_code, memacc_code, mem_flags, inst_flags, |
| decode_template = ImmNopCheckDecode, |
| exec_template_base = 'Load') |
| }}; |
| |
| def format StoreUnalignedMemory(memacc_code, ea_code = {{ EA = (Rs + disp) & ~3; }}, |
| mem_flags = [], inst_flags = []) {{ |
| decl_code = ''' |
| uint32_t mem_word = 0; |
| uint32_t unaligned_addr = Rs + disp; |
| uint32_t byte_offset = unaligned_addr & 3; |
| if (GuestByteOrder == BigEndianByteOrder) |
| byte_offset ^= 3; |
| fault = readMemAtomic(xc, traceData, EA, mem_word, memAccessFlags); |
| ''' |
| memacc_code = decl_code + memacc_code + '\nMem = mem_word;\n' |
| |
| (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 Prefetch(ea_code = {{ EA = Rs + disp; }}, |
| mem_flags = [], pf_flags = [], inst_flags = []) {{ |
| pf_mem_flags = mem_flags + pf_flags + ['PREFETCH'] |
| pf_inst_flags = inst_flags |
| |
| (header_output, decoder_output, decode_block, exec_output) = \ |
| LoadStoreBase(name, Name, ea_code, |
| 'warn_once("Prefetching not implemented for MIPS\\n");', |
| pf_mem_flags, pf_inst_flags, exec_template_base = 'Misc') |
| |
| }}; |
| |
| def format StoreCond(memacc_code, postacc_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, |
| postacc_code, exec_template_base = 'StoreCond') |
| }}; |
